cli/babeltrace-cfg-cli-args.c

   1 /*
   2  * Babeltrace trace converter - parameter parsing
   3  *
   4  * Copyright 2016 Philippe Proulx <pproulx@efficios.com>
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  19  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  22  * SOFTWARE.
  23  */
  24
  25 #define BT_LOG_TAG "CLI-CFG-CLI-ARGS"
  26 #include "logging.h"
  27
  28 #include <errno.h>
  29 #include <stdlib.h>
  30 #include <string.h>
  31 #include <babeltrace/assert-internal.h>
  32 #include <stdio.h>
  33 #include <stdbool.h>
  34 #include <inttypes.h>
  35 #include <babeltrace/babeltrace.h>
  36 #include <babeltrace/common-internal.h>
  37 #include <popt.h>
  38 #include <glib.h>
  39 #include <sys/types.h>
  40 #include "babeltrace-cfg.h"
  41 #include "babeltrace-cfg-cli-args.h"
  42 #include "babeltrace-cfg-cli-args-connect.h"
  43 #include "version.h"
  44
  45 /*
  46  * Error printf() macro which prepends "Error: " the first time it's
  47  * called. This gives a nicer feel than having a bunch of error prefixes
  48  * (since the following lines usually describe the error and possible
  49  * solutions), or the error prefix just at the end.
  50  */
  51 #define printf_err(fmt, args...)                                        \
  52         do {                                                            \
  53                 if (is_first_error) {                                   \
  54                         fprintf(stderr, "Command line error: ");        \
  55                         is_first_error = false;                         \
  56                 }                                                       \
  57                 fprintf(stderr, fmt, ##args);                           \
  58         } while (0)
  59
  60 static bool is_first_error = true;
  61
  62 /* INI-style parsing FSM states */
  63 enum ini_parsing_fsm_state {
  64         /* Expect a map key (identifier) */
  65         INI_EXPECT_MAP_KEY,
  66
  67         /* Expect an equal character ('=') */
  68         INI_EXPECT_EQUAL,
  69
  70         /* Expect a value */
  71         INI_EXPECT_VALUE,
  72
  73         /* Expect a negative number value */
  74         INI_EXPECT_VALUE_NUMBER_NEG,
  75
  76         /* Expect a comma character (',') */
  77         INI_EXPECT_COMMA,
  78 };
  79
  80 /* INI-style parsing state variables */
  81 struct ini_parsing_state {
  82         /* Lexical scanner (owned by this) */
  83         GScanner *scanner;
  84
  85         /* Output map value object being filled (owned by this) */
  86         struct bt_value *params;
  87
  88         /* Next expected FSM state */
  89         enum ini_parsing_fsm_state expecting;
  90
  91         /* Last decoded map key (owned by this) */
  92         char *last_map_key;
  93
  94         /* Complete INI-style string to parse (not owned by this) */
  95         const char *arg;
  96
  97         /* Error buffer (not owned by this) */
  98         GString *ini_error;
  99 };
 100
 101 /* Offset option with "is set" boolean */
 102 struct offset_opt {
 103         int64_t value;
 104         bool is_set;
 105 };
 106
 107 /* Legacy "ctf"/"lttng-live" format options */
 108 struct ctf_legacy_opts {
 109         struct offset_opt offset_s;
 110         struct offset_opt offset_ns;
 111         bool stream_intersection;
 112 };
 113
 114 /* Legacy "text" format options */
 115 struct text_legacy_opts {
 116         /*
 117          * output, dbg_info_dir, dbg_info_target_prefix, names,
 118          * and fields are owned by this.
 119          */
 120         GString *output;
 121         GString *dbg_info_dir;
 122         GString *dbg_info_target_prefix;
 123         const struct bt_value *names;
 124         const struct bt_value *fields;
 125
 126         /* Flags */
 127         bool no_delta;
 128         bool clock_cycles;
 129         bool clock_seconds;
 130         bool clock_date;
 131         bool clock_gmt;
 132         bool dbg_info_full_path;
 133         bool verbose;
 134 };
 135
 136 /* Legacy input format format */
 137 enum legacy_input_format {
 138         LEGACY_INPUT_FORMAT_NONE = 0,
 139         LEGACY_INPUT_FORMAT_CTF,
 140         LEGACY_INPUT_FORMAT_LTTNG_LIVE,
 141 };
 142
 143 /* Legacy output format format */
 144 enum legacy_output_format {
 145         LEGACY_OUTPUT_FORMAT_NONE = 0,
 146         LEGACY_OUTPUT_FORMAT_TEXT,
 147         LEGACY_OUTPUT_FORMAT_DUMMY,
 148 };
 149
 150 /*
 151  * Prints the "out of memory" error.
 152  */
 153 static
 154 void print_err_oom(void)
 155 {
 156         printf_err("Out of memory\n");
 157 }
 158
 159 /*
 160  * Appends an "expecting token" error to the INI-style parsing state's
 161  * error buffer.
 162  */
 163 static
 164 void ini_append_error_expecting(struct ini_parsing_state *state,
 165                 GScanner *scanner, const char *expecting)
 166 {
 167         size_t i;
 168         size_t pos;
 169
 170         g_string_append_printf(state->ini_error, "Expecting %s:\n", expecting);
 171
 172         /* Only print error if there's one line */
 173         if (strchr(state->arg, '\n') != NULL || strlen(state->arg) == 0) {
 174                 return;
 175         }
 176
 177         g_string_append_printf(state->ini_error, "\n    %s\n", state->arg);
 178         pos = g_scanner_cur_position(scanner) + 4;
 179
 180         if (!g_scanner_eof(scanner)) {
 181                 pos--;
 182         }
 183
 184         for (i = 0; i < pos; ++i) {
 185                 g_string_append_printf(state->ini_error, " ");
 186         }
 187
 188         g_string_append_printf(state->ini_error, "^\n\n");
 189 }
 190
 191 static
 192 int ini_handle_state(struct ini_parsing_state *state)
 193 {
 194         int ret = 0;
 195         GTokenType token_type;
 196         struct bt_value *value = NULL;
 197
 198         token_type = g_scanner_get_next_token(state->scanner);
 199         if (token_type == G_TOKEN_EOF) {
 200                 if (state->expecting != INI_EXPECT_COMMA) {
 201                         switch (state->expecting) {
 202                         case INI_EXPECT_EQUAL:
 203                                 ini_append_error_expecting(state,
 204                                         state->scanner, "'='");
 205                                 break;
 206                         case INI_EXPECT_VALUE:
 207                         case INI_EXPECT_VALUE_NUMBER_NEG:
 208                                 ini_append_error_expecting(state,
 209                                         state->scanner, "value");
 210                                 break;
 211                         case INI_EXPECT_MAP_KEY:
 212                                 ini_append_error_expecting(state,
 213                                         state->scanner, "unquoted map key");
 214                                 break;
 215                         default:
 216                                 break;
 217                         }
 218                         goto error;
 219                 }
 220
 221                 /* We're done! */
 222                 ret = 1;
 223                 goto success;
 224         }
 225
 226         switch (state->expecting) {
 227         case INI_EXPECT_MAP_KEY:
 228                 if (token_type != G_TOKEN_IDENTIFIER) {
 229                         ini_append_error_expecting(state, state->scanner,
 230                                 "unquoted map key");
 231                         goto error;
 232                 }
 233
 234                 free(state->last_map_key);
 235                 state->last_map_key =
 236                         strdup(state->scanner->value.v_identifier);
 237                 if (!state->last_map_key) {
 238                         g_string_append(state->ini_error,
 239                                 "Out of memory\n");
 240                         goto error;
 241                 }
 242
 243                 if (bt_value_map_has_entry(state->params,
 244                                            state->last_map_key)) {
 245                         g_string_append_printf(state->ini_error,
 246                                 "Duplicate parameter key: `%s`\n",
 247                                 state->last_map_key);
 248                         goto error;
 249                 }
 250
 251                 state->expecting = INI_EXPECT_EQUAL;
 252                 goto success;
 253         case INI_EXPECT_EQUAL:
 254                 if (token_type != G_TOKEN_CHAR) {
 255                         ini_append_error_expecting(state,
 256                                 state->scanner, "'='");
 257                         goto error;
 258                 }
 259
 260                 if (state->scanner->value.v_char != '=') {
 261                         ini_append_error_expecting(state,
 262                                 state->scanner, "'='");
 263                         goto error;
 264                 }
 265
 266                 state->expecting = INI_EXPECT_VALUE;
 267                 goto success;
 268         case INI_EXPECT_VALUE:
 269         {
 270                 switch (token_type) {
 271                 case G_TOKEN_CHAR:
 272                         if (state->scanner->value.v_char == '-') {
 273                                 /* Negative number */
 274                                 state->expecting =
 275                                         INI_EXPECT_VALUE_NUMBER_NEG;
 276                                 goto success;
 277                         } else {
 278                                 ini_append_error_expecting(state,
 279                                         state->scanner, "value");
 280                                 goto error;
 281                         }
 282                         break;
 283                 case G_TOKEN_INT:
 284                 {
 285                         /* Positive integer */
 286                         uint64_t int_val = state->scanner->value.v_int64;
 287
 288                         if (int_val > (1ULL << 63) - 1) {
 289                                 g_string_append_printf(state->ini_error,
 290                                         "Integer value %" PRIu64 " is outside the range of a 64-bit signed integer\n",
 291                                         int_val);
 292                                 goto error;
 293                         }
 294
 295                         value = bt_value_integer_create_init((int64_t)int_val);
 296                         break;
 297                 }
 298                 case G_TOKEN_FLOAT:
 299                         /* Positive floating point number */
 300                         value = bt_value_real_create_init(state->scanner->value.v_float);
 301                         break;
 302                 case G_TOKEN_STRING:
 303                         /* Quoted string */
 304                         value = bt_value_string_create_init(state->scanner->value.v_string);
 305                         break;
 306                 case G_TOKEN_IDENTIFIER:
 307                 {
 308                         /*
 309                          * Using symbols would be appropriate here,
 310                          * but said symbols are allowed as map key,
 311                          * so it's easier to consider everything an
 312                          * identifier.
 313                          *
 314                          * If one of the known symbols is not
 315                          * recognized here, then fall back to creating
 316                          * a string value.
 317                          */
 318                         const char *id = state->scanner->value.v_identifier;
 319
 320                         if (!strcmp(id, "null") || !strcmp(id, "NULL") ||
 321                                         !strcmp(id, "nul")) {
 322                                 value = bt_value_null;
 323                         } else if (!strcmp(id, "true") || !strcmp(id, "TRUE") ||
 324                                         !strcmp(id, "yes") ||
 325                                         !strcmp(id, "YES")) {
 326                                 value = bt_value_bool_create_init(true);
 327                         } else if (!strcmp(id, "false") ||
 328                                         !strcmp(id, "FALSE") ||
 329                                         !strcmp(id, "no") ||
 330                                         !strcmp(id, "NO")) {
 331                                 value = bt_value_bool_create_init(false);
 332                         } else {
 333                                 value = bt_value_string_create_init(id);
 334                         }
 335                         break;
 336                 }
 337                 default:
 338                         /* Unset value variable will trigger the error */
 339                         break;
 340                 }
 341
 342                 if (!value) {
 343                         ini_append_error_expecting(state,
 344                                 state->scanner, "value");
 345                         goto error;
 346                 }
 347
 348                 state->expecting = INI_EXPECT_COMMA;
 349                 goto success;
 350         }
 351         case INI_EXPECT_VALUE_NUMBER_NEG:
 352         {
 353                 switch (token_type) {
 354                 case G_TOKEN_INT:
 355                 {
 356                         /* Negative integer */
 357                         uint64_t int_val = state->scanner->value.v_int64;
 358
 359                         if (int_val > (1ULL << 63) - 1) {
 360                                 g_string_append_printf(state->ini_error,
 361                                         "Integer value -%" PRIu64 " is outside the range of a 64-bit signed integer\n",
 362                                         int_val);
 363                                 goto error;
 364                         }
 365
 366                         value = bt_value_integer_create_init(-((int64_t)int_val));
 367                         break;
 368                 }
 369                 case G_TOKEN_FLOAT:
 370                         /* Negative floating point number */
 371                         value = bt_value_real_create_init(-state->scanner->value.v_float);
 372                         break;
 373                 default:
 374                         /* Unset value variable will trigger the error */
 375                         break;
 376                 }
 377
 378                 if (!value) {
 379                         ini_append_error_expecting(state,
 380                                 state->scanner, "value");
 381                         goto error;
 382                 }
 383
 384                 state->expecting = INI_EXPECT_COMMA;
 385                 goto success;
 386         }
 387         case INI_EXPECT_COMMA:
 388                 if (token_type != G_TOKEN_CHAR) {
 389                         ini_append_error_expecting(state,
 390                                 state->scanner, "','");
 391                         goto error;
 392                 }
 393
 394                 if (state->scanner->value.v_char != ',') {
 395                         ini_append_error_expecting(state,
 396                                 state->scanner, "','");
 397                         goto error;
 398                 }
 399
 400                 state->expecting = INI_EXPECT_MAP_KEY;
 401                 goto success;
 402         default:
 403                 abort();
 404         }
 405
 406 error:
 407         ret = -1;
 408         goto end;
 409
 410 success:
 411         if (value) {
 412                 if (bt_value_map_insert_entry(state->params,
 413                                 state->last_map_key, value)) {
 414                         /* Only override return value on error */
 415                         ret = -1;
 416                 }
 417         }
 418
 419 end:
 420         BT_OBJECT_PUT_REF_AND_RESET(value);
 421         return ret;
 422 }
 423
 424 /*
 425  * Converts an INI-style argument to an equivalent map value object.
 426  *
 427  * Return value is owned by the caller.
 428  */
 429 static
 430 struct bt_value *bt_value_from_ini(const char *arg,
 431                 GString *ini_error)
 432 {
 433         /* Lexical scanner configuration */
 434         GScannerConfig scanner_config = {
 435                 /* Skip whitespaces */
 436                 .cset_skip_characters = " \t\n",
 437
 438                 /* Identifier syntax is: [a-zA-Z_][a-zA-Z0-9_.:-]* */
 439                 .cset_identifier_first =
 440                         G_CSET_a_2_z
 441                         "_"
 442                         G_CSET_A_2_Z,
 443                 .cset_identifier_nth =
 444                         G_CSET_a_2_z
 445                         "_0123456789-.:"
 446                         G_CSET_A_2_Z,
 447
 448                 /* "hello" and "Hello" two different keys */
 449                 .case_sensitive = TRUE,
 450
 451                 /* No comments */
 452                 .cpair_comment_single = NULL,
 453                 .skip_comment_multi = TRUE,
 454                 .skip_comment_single = TRUE,
 455                 .scan_comment_multi = FALSE,
 456
 457                 /*
 458                  * Do scan identifiers, including 1-char identifiers,
 459                  * but NULL is a normal identifier.
 460                  */
 461                 .scan_identifier = TRUE,
 462                 .scan_identifier_1char = TRUE,
 463                 .scan_identifier_NULL = FALSE,
 464
 465                 /*
 466                  * No specific symbols: null and boolean "symbols" are
 467                  * scanned as plain identifiers.
 468                  */
 469                 .scan_symbols = FALSE,
 470                 .symbol_2_token = FALSE,
 471                 .scope_0_fallback = FALSE,
 472
 473                 /*
 474                  * Scan "0b"-, "0"-, and "0x"-prefixed integers, but not
 475                  * integers prefixed with "$".
 476                  */
 477                 .scan_binary = TRUE,
 478                 .scan_octal = TRUE,
 479                 .scan_float = TRUE,
 480                 .scan_hex = TRUE,
 481                 .scan_hex_dollar = FALSE,
 482
 483                 /* Convert scanned numbers to integer tokens */
 484                 .numbers_2_int = TRUE,
 485
 486                 /* Support both integers and floating-point numbers */
 487                 .int_2_float = FALSE,
 488
 489                 /* Scan integers as 64-bit signed integers */
 490                 .store_int64 = TRUE,
 491
 492                 /* Only scan double-quoted strings */
 493                 .scan_string_sq = FALSE,
 494                 .scan_string_dq = TRUE,
 495
 496                 /* Do not converter identifiers to string tokens */
 497                 .identifier_2_string = FALSE,
 498
 499                 /* Scan characters as G_TOKEN_CHAR token */
 500                 .char_2_token = FALSE,
 501         };
 502         struct ini_parsing_state state = {
 503                 .scanner = NULL,
 504                 .params = NULL,
 505                 .expecting = INI_EXPECT_MAP_KEY,
 506                 .arg = arg,
 507                 .ini_error = ini_error,
 508         };
 509
 510         state.params = bt_value_map_create();
 511         if (!state.params) {
 512                 goto error;
 513         }
 514
 515         state.scanner = g_scanner_new(&scanner_config);
 516         if (!state.scanner) {
 517                 goto error;
 518         }
 519
 520         /* Let the scan begin */
 521         g_scanner_input_text(state.scanner, arg, strlen(arg));
 522
 523         while (true) {
 524                 int ret = ini_handle_state(&state);
 525
 526                 if (ret < 0) {
 527                         /* Error */
 528                         goto error;
 529                 } else if (ret > 0) {
 530                         /* Done */
 531                         break;
 532                 }
 533         }
 534
 535         goto end;
 536
 537 error:
 538         BT_OBJECT_PUT_REF_AND_RESET(state.params);
 539
 540 end:
 541         if (state.scanner) {
 542                 g_scanner_destroy(state.scanner);
 543         }
 544
 545         free(state.last_map_key);
 546         return state.params;
 547 }
 548
 549 /*
 550  * Returns the parameters map value object from a command-line
 551  * parameter option's argument.
 552  *
 553  * Return value is owned by the caller.
 554  */
 555 static
 556 struct bt_value *bt_value_from_arg(const char *arg)
 557 {
 558         struct bt_value *params = NULL;
 559         GString *ini_error = NULL;
 560
 561         ini_error = g_string_new(NULL);
 562         if (!ini_error) {
 563                 print_err_oom();
 564                 goto end;
 565         }
 566
 567         /* Try INI-style parsing */
 568         params = bt_value_from_ini(arg, ini_error);
 569         if (!params) {
 570                 printf_err("%s", ini_error->str);
 571                 goto end;
 572         }
 573
 574 end:
 575         if (ini_error) {
 576                 g_string_free(ini_error, TRUE);
 577         }
 578
 579         return params;
 580 }
 581
 582 /*
 583  * Returns the plugin name, component class name, component class type,
 584  * and component name from a command-line --component option's argument.
 585  * arg must have the following format:
 586  *
 587  *     [NAME:]TYPE.PLUGIN.CLS
 588  *
 589  * where NAME is the optional component name, TYPE is either `source`,
 590  * `filter`, or `sink`, PLUGIN is the plugin name, and CLS is the
 591  * component class name.
 592  *
 593  * On success, both *plugin and *component are not NULL. *plugin
 594  * and *comp_cls are owned by the caller. On success, *name can be NULL
 595  * if no component class name was found, and *comp_cls_type is set.
 596  */
 597 static
 598 void plugin_comp_cls_names(const char *arg, char **name, char **plugin,
 599                 char **comp_cls, enum bt_component_class_type *comp_cls_type)
 600 {
 601         const char *at = arg;
 602         GString *gs_name = NULL;
 603         GString *gs_comp_cls_type = NULL;
 604         GString *gs_plugin = NULL;
 605         GString *gs_comp_cls = NULL;
 606         size_t end_pos;
 607
 608         BT_ASSERT(arg);
 609         BT_ASSERT(plugin);
 610         BT_ASSERT(comp_cls);
 611         BT_ASSERT(comp_cls_type);
 612
 613         if (!bt_common_string_is_printable(arg)) {
 614                 printf_err("Argument contains a non-printable character\n");
 615                 goto error;
 616         }
 617
 618         /* Parse the component name */
 619         gs_name = bt_common_string_until(at, ".:\\", ":", &end_pos);
 620         if (!gs_name) {
 621                 goto error;
 622         }
 623
 624         if (arg[end_pos] == ':') {
 625                 at += end_pos + 1;
 626         } else {
 627                 /* No name */
 628                 g_string_assign(gs_name, "");
 629         }
 630
 631         /* Parse the component class type */
 632         gs_comp_cls_type = bt_common_string_until(at, ".:\\", ".", &end_pos);
 633         if (!gs_comp_cls_type || at[end_pos] == '\0') {
 634                 printf_err("Missing component class type (`source`, `filter`, or `sink`)\n");
 635                 goto error;
 636         }
 637
 638         if (strcmp(gs_comp_cls_type->str, "source") == 0 ||
 639                         strcmp(gs_comp_cls_type->str, "src") == 0) {
 640                 *comp_cls_type = BT_COMPONENT_CLASS_TYPE_SOURCE;
 641         } else if (strcmp(gs_comp_cls_type->str, "filter") == 0 ||
 642                         strcmp(gs_comp_cls_type->str, "flt") == 0) {
 643                 *comp_cls_type = BT_COMPONENT_CLASS_TYPE_FILTER;
 644         } else if (strcmp(gs_comp_cls_type->str, "sink") == 0) {
 645                 *comp_cls_type = BT_COMPONENT_CLASS_TYPE_SINK;
 646         } else {
 647                 printf_err("Unknown component class type: `%s`\n",
 648                         gs_comp_cls_type->str);
 649                 goto error;
 650         }
 651
 652         at += end_pos + 1;
 653
 654         /* Parse the plugin name */
 655         gs_plugin = bt_common_string_until(at, ".:\\", ".", &end_pos);
 656         if (!gs_plugin || gs_plugin->len == 0 || at[end_pos] == '\0') {
 657                 printf_err("Missing plugin or component class name\n");
 658                 goto error;
 659         }
 660
 661         at += end_pos + 1;
 662
 663         /* Parse the component class name */
 664         gs_comp_cls = bt_common_string_until(at, ".:\\", ".", &end_pos);
 665         if (!gs_comp_cls || gs_comp_cls->len == 0) {
 666                 printf_err("Missing component class name\n");
 667                 goto error;
 668         }
 669
 670         if (at[end_pos] != '\0') {
 671                 /* Found a non-escaped `.` */
 672                 goto error;
 673         }
 674
 675         if (name) {
 676                 if (gs_name->len == 0) {
 677                         *name = NULL;
 678                         g_string_free(gs_name, TRUE);
 679                 } else {
 680                         *name = gs_name->str;
 681                         g_string_free(gs_name, FALSE);
 682                 }
 683         } else {
 684                 g_string_free(gs_name, TRUE);
 685         }
 686
 687         *plugin = gs_plugin->str;
 688         *comp_cls = gs_comp_cls->str;
 689         g_string_free(gs_plugin, FALSE);
 690         g_string_free(gs_comp_cls, FALSE);
 691         gs_name = NULL;
 692         gs_plugin = NULL;
 693         gs_comp_cls = NULL;
 694         goto end;
 695
 696 error:
 697         if (name) {
 698                 *name = NULL;
 699         }
 700
 701         *plugin = NULL;
 702         *comp_cls = NULL;
 703
 704 end:
 705         if (gs_name) {
 706                 g_string_free(gs_name, TRUE);
 707         }
 708
 709         if (gs_plugin) {
 710                 g_string_free(gs_plugin, TRUE);
 711         }
 712
 713         if (gs_comp_cls) {
 714                 g_string_free(gs_comp_cls, TRUE);
 715         }
 716
 717         if (gs_comp_cls_type) {
 718                 g_string_free(gs_comp_cls_type, TRUE);
 719         }
 720
 721         return;
 722 }
 723
 724 /*
 725  * Prints the Babeltrace version.
 726  */
 727 static
 728 void print_version(void)
 729 {
 730         if (GIT_VERSION[0] == '\0') {
 731                 puts("Babeltrace " VERSION);
 732         } else {
 733                 puts("Babeltrace " VERSION  " - " GIT_VERSION);
 734         }
 735 }
 736
 737 /*
 738  * Destroys a component configuration.
 739  */
 740 static
 741 void bt_config_component_destroy(struct bt_object *obj)
 742 {
 743         struct bt_config_component *bt_config_component =
 744                 container_of(obj, struct bt_config_component, base);
 745
 746         if (!obj) {
 747                 goto end;
 748         }
 749
 750         if (bt_config_component->plugin_name) {
 751                 g_string_free(bt_config_component->plugin_name, TRUE);
 752         }
 753
 754         if (bt_config_component->comp_cls_name) {
 755                 g_string_free(bt_config_component->comp_cls_name, TRUE);
 756         }
 757
 758         if (bt_config_component->instance_name) {
 759                 g_string_free(bt_config_component->instance_name, TRUE);
 760         }
 761
 762         BT_OBJECT_PUT_REF_AND_RESET(bt_config_component->params);
 763         g_free(bt_config_component);
 764
 765 end:
 766         return;
 767 }
 768
 769 /*
 770  * Creates a component configuration using the given plugin name and
 771  * component name. `plugin_name` and `comp_cls_name` are copied (belong
 772  * to the return value).
 773  *
 774  * Return value is owned by the caller.
 775  */
 776 static
 777 struct bt_config_component *bt_config_component_create(
 778                 enum bt_component_class_type type,
 779                 const char *plugin_name, const char *comp_cls_name)
 780 {
 781         struct bt_config_component *cfg_component = NULL;
 782
 783         cfg_component = g_new0(struct bt_config_component, 1);
 784         if (!cfg_component) {
 785                 print_err_oom();
 786                 goto error;
 787         }
 788
 789         bt_object_init_shared(&cfg_component->base,
 790                 bt_config_component_destroy);
 791         cfg_component->type = type;
 792         cfg_component->plugin_name = g_string_new(plugin_name);
 793         if (!cfg_component->plugin_name) {
 794                 print_err_oom();
 795                 goto error;
 796         }
 797
 798         cfg_component->comp_cls_name = g_string_new(comp_cls_name);
 799         if (!cfg_component->comp_cls_name) {
 800                 print_err_oom();
 801                 goto error;
 802         }
 803
 804         cfg_component->instance_name = g_string_new(NULL);
 805         if (!cfg_component->instance_name) {
 806                 print_err_oom();
 807                 goto error;
 808         }
 809
 810         /* Start with empty parameters */
 811         cfg_component->params = bt_value_map_create();
 812         if (!cfg_component->params) {
 813                 print_err_oom();
 814                 goto error;
 815         }
 816
 817         goto end;
 818
 819 error:
 820         BT_OBJECT_PUT_REF_AND_RESET(cfg_component);
 821
 822 end:
 823         return cfg_component;
 824 }
 825
 826 /*
 827  * Creates a component configuration from a command-line --component
 828  * option's argument.
 829  */
 830 static
 831 struct bt_config_component *bt_config_component_from_arg(const char *arg)
 832 {
 833         struct bt_config_component *cfg_comp = NULL;
 834         char *name = NULL;
 835         char *plugin_name = NULL;
 836         char *comp_cls_name = NULL;
 837         enum bt_component_class_type type;
 838
 839         plugin_comp_cls_names(arg, &name, &plugin_name, &comp_cls_name, &type);
 840         if (!plugin_name || !comp_cls_name) {
 841                 goto error;
 842         }
 843
 844         cfg_comp = bt_config_component_create(type, plugin_name, comp_cls_name);
 845         if (!cfg_comp) {
 846                 goto error;
 847         }
 848
 849         if (name) {
 850                 g_string_assign(cfg_comp->instance_name, name);
 851         }
 852
 853         goto end;
 854
 855 error:
 856         BT_OBJECT_PUT_REF_AND_RESET(cfg_comp);
 857
 858 end:
 859         g_free(name);
 860         g_free(plugin_name);
 861         g_free(comp_cls_name);
 862         return cfg_comp;
 863 }
 864
 865 /*
 866  * Destroys a configuration.
 867  */
 868 static
 869 void bt_config_destroy(struct bt_object *obj)
 870 {
 871         struct bt_config *cfg =
 872                 container_of(obj, struct bt_config, base);
 873
 874         if (!obj) {
 875                 goto end;
 876         }
 877
 878         BT_OBJECT_PUT_REF_AND_RESET(cfg->plugin_paths);
 879
 880         switch (cfg->command) {
 881         case BT_CONFIG_COMMAND_RUN:
 882                 if (cfg->cmd_data.run.sources) {
 883                         g_ptr_array_free(cfg->cmd_data.run.sources, TRUE);
 884                 }
 885
 886                 if (cfg->cmd_data.run.filters) {
 887                         g_ptr_array_free(cfg->cmd_data.run.filters, TRUE);
 888                 }
 889
 890                 if (cfg->cmd_data.run.sinks) {
 891                         g_ptr_array_free(cfg->cmd_data.run.sinks, TRUE);
 892                 }
 893
 894                 if (cfg->cmd_data.run.connections) {
 895                         g_ptr_array_free(cfg->cmd_data.run.connections,
 896                                 TRUE);
 897                 }
 898                 break;
 899         case BT_CONFIG_COMMAND_LIST_PLUGINS:
 900                 break;
 901         case BT_CONFIG_COMMAND_HELP:
 902                 BT_OBJECT_PUT_REF_AND_RESET(cfg->cmd_data.help.cfg_component);
 903                 break;
 904         case BT_CONFIG_COMMAND_QUERY:
 905                 BT_OBJECT_PUT_REF_AND_RESET(cfg->cmd_data.query.cfg_component);
 906
 907                 if (cfg->cmd_data.query.object) {
 908                         g_string_free(cfg->cmd_data.query.object, TRUE);
 909                 }
 910                 break;
 911         case BT_CONFIG_COMMAND_PRINT_CTF_METADATA:
 912                 if (cfg->cmd_data.print_ctf_metadata.path) {
 913                         g_string_free(cfg->cmd_data.print_ctf_metadata.path,
 914                                 TRUE);
 915                         g_string_free(
 916                                 cfg->cmd_data.print_ctf_metadata.output_path,
 917                                 TRUE);
 918                 }
 919                 break;
 920         case BT_CONFIG_COMMAND_PRINT_LTTNG_LIVE_SESSIONS:
 921                 if (cfg->cmd_data.print_lttng_live_sessions.url) {
 922                         g_string_free(
 923                                 cfg->cmd_data.print_lttng_live_sessions.url,
 924                                 TRUE);
 925                         g_string_free(
 926                                 cfg->cmd_data.print_lttng_live_sessions.output_path,
 927                                 TRUE);
 928                 }
 929                 break;
 930         default:
 931                 abort();
 932         }
 933
 934         g_free(cfg);
 935
 936 end:
 937         return;
 938 }
 939
 940 static
 941 void destroy_glist_of_gstring(GList *list)
 942 {
 943         GList *at;
 944
 945         if (!list) {
 946                 return;
 947         }
 948
 949         for (at = list; at != NULL; at = g_list_next(at)) {
 950                 g_string_free(at->data, TRUE);
 951         }
 952
 953         g_list_free(list);
 954 }
 955
 956 /*
 957  * Creates a simple lexical scanner for parsing comma-delimited names
 958  * and fields.
 959  *
 960  * Return value is owned by the caller.
 961  */
 962 static
 963 GScanner *create_csv_identifiers_scanner(void)
 964 {
 965         GScanner *scanner;
 966         GScannerConfig scanner_config = {
 967                 .cset_skip_characters = " \t\n",
 968                 .cset_identifier_first = G_CSET_a_2_z G_CSET_A_2_Z "_",
 969                 .cset_identifier_nth = G_CSET_a_2_z G_CSET_A_2_Z ":_-",
 970                 .case_sensitive = TRUE,
 971                 .cpair_comment_single = NULL,
 972                 .skip_comment_multi = TRUE,
 973                 .skip_comment_single = TRUE,
 974                 .scan_comment_multi = FALSE,
 975                 .scan_identifier = TRUE,
 976                 .scan_identifier_1char = TRUE,
 977                 .scan_identifier_NULL = FALSE,
 978                 .scan_symbols = FALSE,
 979                 .symbol_2_token = FALSE,
 980                 .scope_0_fallback = FALSE,
 981                 .scan_binary = FALSE,
 982                 .scan_octal = FALSE,
 983                 .scan_float = FALSE,
 984                 .scan_hex = FALSE,
 985                 .scan_hex_dollar = FALSE,
 986                 .numbers_2_int = FALSE,
 987                 .int_2_float = FALSE,
 988                 .store_int64 = FALSE,
 989                 .scan_string_sq = FALSE,
 990                 .scan_string_dq = FALSE,
 991                 .identifier_2_string = FALSE,
 992                 .char_2_token = TRUE,
 993         };
 994
 995         scanner = g_scanner_new(&scanner_config);
 996         if (!scanner) {
 997                 print_err_oom();
 998         }
 999
1000         return scanner;
1001 }
1002
1003 /*
1004  * Converts a comma-delimited list of known names (--names option) to
1005  * an array value object containing those names as string value objects.
1006  *
1007  * Return value is owned by the caller.
1008  */
1009 static
1010 struct bt_value *names_from_arg(const char *arg)
1011 {
1012         GScanner *scanner = NULL;
1013         struct bt_value *names = NULL;
1014         bool found_all = false, found_none = false, found_item = false;
1015
1016         names = bt_value_array_create();
1017         if (!names) {
1018                 print_err_oom();
1019                 goto error;
1020         }
1021
1022         scanner = create_csv_identifiers_scanner();
1023         if (!scanner) {
1024                 goto error;
1025         }
1026
1027         g_scanner_input_text(scanner, arg, strlen(arg));
1028
1029         while (true) {
1030                 GTokenType token_type = g_scanner_get_next_token(scanner);
1031
1032                 switch (token_type) {
1033                 case G_TOKEN_IDENTIFIER:
1034                 {
1035                         const char *identifier = scanner->value.v_identifier;
1036
1037                         if (!strcmp(identifier, "payload") ||
1038                                         !strcmp(identifier, "args") ||
1039                                         !strcmp(identifier, "arg")) {
1040                                 found_item = true;
1041                                 if (bt_value_array_append_string_element(names,
1042                                                 "payload")) {
1043                                         goto error;
1044                                 }
1045                         } else if (!strcmp(identifier, "context") ||
1046                                         !strcmp(identifier, "ctx")) {
1047                                 found_item = true;
1048                                 if (bt_value_array_append_string_element(names,
1049                                                 "context")) {
1050                                         goto error;
1051                                 }
1052                         } else if (!strcmp(identifier, "scope") ||
1053                                         !strcmp(identifier, "header")) {
1054                                 found_item = true;
1055                                 if (bt_value_array_append_string_element(names,
1056                                                 identifier)) {
1057                                         goto error;
1058                                 }
1059                         } else if (!strcmp(identifier, "all")) {
1060                                 found_all = true;
1061                                 if (bt_value_array_append_string_element(names,
1062                                                 identifier)) {
1063                                         goto error;
1064                                 }
1065                         } else if (!strcmp(identifier, "none")) {
1066                                 found_none = true;
1067                                 if (bt_value_array_append_string_element(names,
1068                                                 identifier)) {
1069                                         goto error;
1070                                 }
1071                         } else {
1072                                 printf_err("Unknown name: `%s`\n",
1073                                         identifier);
1074                                 goto error;
1075                         }
1076                         break;
1077                 }
1078                 case G_TOKEN_COMMA:
1079                         continue;
1080                 case G_TOKEN_EOF:
1081                         goto end;
1082                 default:
1083                         goto error;
1084                 }
1085         }
1086
1087 end:
1088         if (found_none && found_all) {
1089                 printf_err("Only either `all` or `none` can be specified in the list given to the --names option, but not both.\n");
1090                 goto error;
1091         }
1092         /*
1093          * Legacy behavior is to clear the defaults (show none) when at
1094          * least one item is specified.
1095          */
1096         if (found_item && !found_none && !found_all) {
1097                 if (bt_value_array_append_string_element(names, "none")) {
1098                         goto error;
1099                 }
1100         }
1101         if (scanner) {
1102                 g_scanner_destroy(scanner);
1103         }
1104         return names;
1105
1106 error:
1107         BT_OBJECT_PUT_REF_AND_RESET(names);
1108         if (scanner) {
1109                 g_scanner_destroy(scanner);
1110         }
1111         return names;
1112 }
1113
1114 /*
1115  * Converts a comma-delimited list of known fields (--fields option) to
1116  * an array value object containing those fields as string
1117  * value objects.
1118  *
1119  * Return value is owned by the caller.
1120  */
1121 static
1122 struct bt_value *fields_from_arg(const char *arg)
1123 {
1124         GScanner *scanner = NULL;
1125         struct bt_value *fields;
1126
1127         fields = bt_value_array_create();
1128         if (!fields) {
1129                 print_err_oom();
1130                 goto error;
1131         }
1132
1133         scanner = create_csv_identifiers_scanner();
1134         if (!scanner) {
1135                 goto error;
1136         }
1137
1138         g_scanner_input_text(scanner, arg, strlen(arg));
1139
1140         while (true) {
1141                 GTokenType token_type = g_scanner_get_next_token(scanner);
1142
1143                 switch (token_type) {
1144                 case G_TOKEN_IDENTIFIER:
1145                 {
1146                         const char *identifier = scanner->value.v_identifier;
1147
1148                         if (!strcmp(identifier, "trace") ||
1149                                         !strcmp(identifier, "trace:hostname") ||
1150                                         !strcmp(identifier, "trace:domain") ||
1151                                         !strcmp(identifier, "trace:procname") ||
1152                                         !strcmp(identifier, "trace:vpid") ||
1153                                         !strcmp(identifier, "loglevel") ||
1154                                         !strcmp(identifier, "emf") ||
1155                                         !strcmp(identifier, "callsite") ||
1156                                         !strcmp(identifier, "all")) {
1157                                 if (bt_value_array_append_string_element(fields,
1158                                                 identifier)) {
1159                                         goto error;
1160                                 }
1161                         } else {
1162                                 printf_err("Unknown field: `%s`\n",
1163                                         identifier);
1164                                 goto error;
1165                         }
1166                         break;
1167                 }
1168                 case G_TOKEN_COMMA:
1169                         continue;
1170                 case G_TOKEN_EOF:
1171                         goto end;
1172                 default:
1173                         goto error;
1174                 }
1175         }
1176
1177         goto end;
1178
1179 error:
1180         BT_OBJECT_PUT_REF_AND_RESET(fields);
1181
1182 end:
1183         if (scanner) {
1184                 g_scanner_destroy(scanner);
1185         }
1186         return fields;
1187 }
1188
1189 static
1190 void append_param_arg(GString *params_arg, const char *key, const char *value)
1191 {
1192         BT_ASSERT(params_arg);
1193         BT_ASSERT(key);
1194         BT_ASSERT(value);
1195
1196         if (params_arg->len != 0) {
1197                 g_string_append_c(params_arg, ',');
1198         }
1199
1200         g_string_append(params_arg, key);
1201         g_string_append_c(params_arg, '=');
1202         g_string_append(params_arg, value);
1203 }
1204
1205 /*
1206  * Inserts the equivalent "prefix-NAME=yes" strings into params_arg
1207  * where the names are in names_array.
1208  */
1209 static
1210 int insert_flat_params_from_array(GString *params_arg,
1211                 const struct bt_value *names_array, const char *prefix)
1212 {
1213         int ret = 0;
1214         int i;
1215         GString *tmpstr = NULL, *default_value = NULL;
1216         bool default_set = false, non_default_set = false;
1217
1218         /*
1219          * names_array may be NULL if no CLI options were specified to
1220          * trigger its creation.
1221          */
1222         if (!names_array) {
1223                 goto end;
1224         }
1225
1226         tmpstr = g_string_new(NULL);
1227         if (!tmpstr) {
1228                 print_err_oom();
1229                 ret = -1;
1230                 goto end;
1231         }
1232
1233         default_value = g_string_new(NULL);
1234         if (!default_value) {
1235                 print_err_oom();
1236                 ret = -1;
1237                 goto end;
1238         }
1239
1240         for (i = 0; i < bt_value_array_get_size(names_array); i++) {
1241                 const struct bt_value *str_obj =
1242                         bt_value_array_borrow_element_by_index_const(names_array,
1243                                                                      i);
1244                 const char *suffix;
1245                 bool is_default = false;
1246
1247                 if (!str_obj) {
1248                         printf_err("Unexpected error\n");
1249                         ret = -1;
1250                         goto end;
1251                 }
1252
1253                 suffix = bt_value_string_get(str_obj);
1254
1255                 g_string_assign(tmpstr, prefix);
1256                 g_string_append(tmpstr, "-");
1257
1258                 /* Special-case for "all" and "none". */
1259                 if (!strcmp(suffix, "all")) {
1260                         is_default = true;
1261                         g_string_assign(default_value, "show");
1262                 } else if (!strcmp(suffix, "none")) {
1263                         is_default = true;
1264                         g_string_assign(default_value, "hide");
1265                 }
1266                 if (is_default) {
1267                         default_set = true;
1268                         g_string_append(tmpstr, "default");
1269                         append_param_arg(params_arg, tmpstr->str,
1270                                 default_value->str);
1271                 } else {
1272                         non_default_set = true;
1273                         g_string_append(tmpstr, suffix);
1274                         append_param_arg(params_arg, tmpstr->str, "yes");
1275                 }
1276         }
1277
1278         /* Implicit field-default=hide if any non-default option is set. */
1279         if (non_default_set && !default_set) {
1280                 g_string_assign(tmpstr, prefix);
1281                 g_string_append(tmpstr, "-default");
1282                 g_string_assign(default_value, "hide");
1283                 append_param_arg(params_arg, tmpstr->str, default_value->str);
1284         }
1285
1286 end:
1287         if (default_value) {
1288                 g_string_free(default_value, TRUE);
1289         }
1290
1291         if (tmpstr) {
1292                 g_string_free(tmpstr, TRUE);
1293         }
1294
1295         return ret;
1296 }
1297
1298 /* popt options */
1299 enum {
1300         OPT_NONE = 0,
1301         OPT_BASE_PARAMS,
1302         OPT_BEGIN,
1303         OPT_CLOCK_CYCLES,
1304         OPT_CLOCK_DATE,
1305         OPT_CLOCK_FORCE_CORRELATE,
1306         OPT_CLOCK_GMT,
1307         OPT_CLOCK_OFFSET,
1308         OPT_CLOCK_OFFSET_NS,
1309         OPT_CLOCK_SECONDS,
1310         OPT_COLOR,
1311         OPT_COMPONENT,
1312         OPT_CONNECT,
1313         OPT_DEBUG,
1314         OPT_DEBUG_INFO,
1315         OPT_DEBUG_INFO_DIR,
1316         OPT_DEBUG_INFO_FULL_PATH,
1317         OPT_DEBUG_INFO_TARGET_PREFIX,
1318         OPT_END,
1319         OPT_FIELDS,
1320         OPT_HELP,
1321         OPT_INPUT_FORMAT,
1322         OPT_KEY,
1323         OPT_LIST,
1324         OPT_NAME,
1325         OPT_NAMES,
1326         OPT_NO_DELTA,
1327         OPT_OMIT_HOME_PLUGIN_PATH,
1328         OPT_OMIT_SYSTEM_PLUGIN_PATH,
1329         OPT_OUTPUT,
1330         OPT_OUTPUT_FORMAT,
1331         OPT_PARAMS,
1332         OPT_PATH,
1333         OPT_PLUGIN_PATH,
1334         OPT_RESET_BASE_PARAMS,
1335         OPT_RETRY_DURATION,
1336         OPT_RUN_ARGS,
1337         OPT_RUN_ARGS_0,
1338         OPT_STREAM_INTERSECTION,
1339         OPT_TIMERANGE,
1340         OPT_URL,
1341         OPT_VALUE,
1342         OPT_VERBOSE,
1343 };
1344
1345 enum bt_config_component_dest {
1346         BT_CONFIG_COMPONENT_DEST_UNKNOWN = -1,
1347         BT_CONFIG_COMPONENT_DEST_SOURCE,
1348         BT_CONFIG_COMPONENT_DEST_FILTER,
1349         BT_CONFIG_COMPONENT_DEST_SINK,
1350 };
1351
1352 /*
1353  * Adds a configuration component to the appropriate configuration
1354  * array depending on the destination.
1355  */
1356 static
1357 void add_run_cfg_comp(struct bt_config *cfg,
1358                 struct bt_config_component *cfg_comp,
1359                 enum bt_config_component_dest dest)
1360 {
1361         bt_object_get_ref(cfg_comp);
1362
1363         switch (dest) {
1364         case BT_CONFIG_COMPONENT_DEST_SOURCE:
1365                 g_ptr_array_add(cfg->cmd_data.run.sources, cfg_comp);
1366                 break;
1367         case BT_CONFIG_COMPONENT_DEST_FILTER:
1368                 g_ptr_array_add(cfg->cmd_data.run.filters, cfg_comp);
1369                 break;
1370         case BT_CONFIG_COMPONENT_DEST_SINK:
1371                 g_ptr_array_add(cfg->cmd_data.run.sinks, cfg_comp);
1372                 break;
1373         default:
1374                 abort();
1375         }
1376 }
1377
1378 static
1379 int add_run_cfg_comp_check_name(struct bt_config *cfg,
1380                 struct bt_config_component *cfg_comp,
1381                 enum bt_config_component_dest dest,
1382                 struct bt_value *instance_names)
1383 {
1384         int ret = 0;
1385
1386         if (cfg_comp->instance_name->len == 0) {
1387                 printf_err("Found an unnamed component\n");
1388                 ret = -1;
1389                 goto end;
1390         }
1391
1392         if (bt_value_map_has_entry(instance_names,
1393                                    cfg_comp->instance_name->str)) {
1394                 printf_err("Duplicate component instance name:\n    %s\n",
1395                         cfg_comp->instance_name->str);
1396                 ret = -1;
1397                 goto end;
1398         }
1399
1400         if (bt_value_map_insert_entry(instance_names,
1401                         cfg_comp->instance_name->str, bt_value_null)) {
1402                 print_err_oom();
1403                 ret = -1;
1404                 goto end;
1405         }
1406
1407         add_run_cfg_comp(cfg, cfg_comp, dest);
1408
1409 end:
1410         return ret;
1411 }
1412
1413 static
1414 int append_env_var_plugin_paths(struct bt_value *plugin_paths)
1415 {
1416         int ret = 0;
1417         const char *envvar;
1418
1419         if (bt_common_is_setuid_setgid()) {
1420                 BT_LOGI_STR("Skipping non-system plugin paths for setuid/setgid binary.");
1421                 goto end;
1422         }
1423
1424         envvar = getenv("BABELTRACE_PLUGIN_PATH");
1425         if (!envvar) {
1426                 goto end;
1427         }
1428
1429         ret = bt_config_append_plugin_paths(plugin_paths, envvar);
1430
1431 end:
1432         if (ret) {
1433                 printf_err("Cannot append plugin paths from BABELTRACE_PLUGIN_PATH\n");
1434         }
1435
1436         return ret;
1437 }
1438
1439 static
1440 int append_home_and_system_plugin_paths(struct bt_value *plugin_paths,
1441                 bool omit_system_plugin_path, bool omit_home_plugin_path)
1442 {
1443         int ret;
1444
1445         if (!omit_home_plugin_path) {
1446                 if (bt_common_is_setuid_setgid()) {
1447                         BT_LOGI_STR("Skipping non-system plugin paths for setuid/setgid binary.");
1448                 } else {
1449                         char *home_plugin_dir =
1450                                 bt_common_get_home_plugin_path();
1451
1452                         if (home_plugin_dir) {
1453                                 ret = bt_config_append_plugin_paths(
1454                                         plugin_paths, home_plugin_dir);
1455                                 free(home_plugin_dir);
1456
1457                                 if (ret) {
1458                                         printf_err("Invalid home plugin path\n");
1459                                         goto error;
1460                                 }
1461                         }
1462                 }
1463         }
1464
1465         if (!omit_system_plugin_path) {
1466                 if (bt_config_append_plugin_paths(plugin_paths,
1467                                 bt_common_get_system_plugin_path())) {
1468                         printf_err("Invalid system plugin path\n");
1469                         goto error;
1470                 }
1471         }
1472         return 0;
1473 error:
1474         printf_err("Cannot append home and system plugin paths\n");
1475         return -1;
1476 }
1477
1478 static
1479 int append_home_and_system_plugin_paths_cfg(struct bt_config *cfg)
1480 {
1481         return append_home_and_system_plugin_paths(cfg->plugin_paths,
1482                 cfg->omit_system_plugin_path, cfg->omit_home_plugin_path);
1483 }
1484
1485 static
1486 struct bt_config *bt_config_base_create(enum bt_config_command command,
1487                 const struct bt_value *initial_plugin_paths,
1488                 bool needs_plugins)
1489 {
1490         struct bt_config *cfg;
1491
1492         /* Create config */
1493         cfg = g_new0(struct bt_config, 1);
1494         if (!cfg) {
1495                 print_err_oom();
1496                 goto error;
1497         }
1498
1499         bt_object_init_shared(&cfg->base, bt_config_destroy);
1500         cfg->command = command;
1501         cfg->command_needs_plugins = needs_plugins;
1502
1503         if (initial_plugin_paths) {
1504                 struct bt_value *initial_plugin_paths_copy;
1505
1506                 (void) bt_value_copy(&initial_plugin_paths_copy,
1507                         initial_plugin_paths);
1508                 cfg->plugin_paths = initial_plugin_paths_copy;
1509         } else {
1510                 cfg->plugin_paths = bt_value_array_create();
1511                 if (!cfg->plugin_paths) {
1512                         print_err_oom();
1513                         goto error;
1514                 }
1515         }
1516
1517         goto end;
1518
1519 error:
1520         BT_OBJECT_PUT_REF_AND_RESET(cfg);
1521
1522 end:
1523         return cfg;
1524 }
1525
1526 static
1527 struct bt_config *bt_config_run_create(
1528                 const struct bt_value *initial_plugin_paths)
1529 {
1530         struct bt_config *cfg;
1531
1532         /* Create config */
1533         cfg = bt_config_base_create(BT_CONFIG_COMMAND_RUN,
1534                 initial_plugin_paths, true);
1535         if (!cfg) {
1536                 goto error;
1537         }
1538
1539         cfg->cmd_data.run.sources = g_ptr_array_new_with_free_func(
1540                 (GDestroyNotify) bt_object_put_ref);
1541         if (!cfg->cmd_data.run.sources) {
1542                 print_err_oom();
1543                 goto error;
1544         }
1545
1546         cfg->cmd_data.run.filters = g_ptr_array_new_with_free_func(
1547                 (GDestroyNotify) bt_object_put_ref);
1548         if (!cfg->cmd_data.run.filters) {
1549                 print_err_oom();
1550                 goto error;
1551         }
1552
1553         cfg->cmd_data.run.sinks = g_ptr_array_new_with_free_func(
1554                 (GDestroyNotify) bt_object_put_ref);
1555         if (!cfg->cmd_data.run.sinks) {
1556                 print_err_oom();
1557                 goto error;
1558         }
1559
1560         cfg->cmd_data.run.connections = g_ptr_array_new_with_free_func(
1561                 (GDestroyNotify) bt_config_connection_destroy);
1562         if (!cfg->cmd_data.run.connections) {
1563                 print_err_oom();
1564                 goto error;
1565         }
1566
1567         goto end;
1568
1569 error:
1570         BT_OBJECT_PUT_REF_AND_RESET(cfg);
1571
1572 end:
1573         return cfg;
1574 }
1575
1576 static
1577 struct bt_config *bt_config_list_plugins_create(
1578                 const struct bt_value *initial_plugin_paths)
1579 {
1580         struct bt_config *cfg;
1581
1582         /* Create config */
1583         cfg = bt_config_base_create(BT_CONFIG_COMMAND_LIST_PLUGINS,
1584                 initial_plugin_paths, true);
1585         if (!cfg) {
1586                 goto error;
1587         }
1588
1589         goto end;
1590
1591 error:
1592         BT_OBJECT_PUT_REF_AND_RESET(cfg);
1593
1594 end:
1595         return cfg;
1596 }
1597
1598 static
1599 struct bt_config *bt_config_help_create(
1600                 const struct bt_value *initial_plugin_paths)
1601 {
1602         struct bt_config *cfg;
1603
1604         /* Create config */
1605         cfg = bt_config_base_create(BT_CONFIG_COMMAND_HELP,
1606                 initial_plugin_paths, true);
1607         if (!cfg) {
1608                 goto error;
1609         }
1610
1611         cfg->cmd_data.help.cfg_component =
1612                 bt_config_component_create(-1, NULL, NULL);
1613         if (!cfg->cmd_data.help.cfg_component) {
1614                 goto error;
1615         }
1616
1617         goto end;
1618
1619 error:
1620         BT_OBJECT_PUT_REF_AND_RESET(cfg);
1621
1622 end:
1623         return cfg;
1624 }
1625
1626 static
1627 struct bt_config *bt_config_query_create(
1628                 const struct bt_value *initial_plugin_paths)
1629 {
1630         struct bt_config *cfg;
1631
1632         /* Create config */
1633         cfg = bt_config_base_create(BT_CONFIG_COMMAND_QUERY,
1634                 initial_plugin_paths, true);
1635         if (!cfg) {
1636                 goto error;
1637         }
1638
1639         cfg->cmd_data.query.object = g_string_new(NULL);
1640         if (!cfg->cmd_data.query.object) {
1641                 print_err_oom();
1642                 goto error;
1643         }
1644
1645         goto end;
1646
1647 error:
1648         BT_OBJECT_PUT_REF_AND_RESET(cfg);
1649
1650 end:
1651         return cfg;
1652 }
1653
1654 static
1655 struct bt_config *bt_config_print_ctf_metadata_create(
1656                 const struct bt_value *initial_plugin_paths)
1657 {
1658         struct bt_config *cfg;
1659
1660         /* Create config */
1661         cfg = bt_config_base_create(BT_CONFIG_COMMAND_PRINT_CTF_METADATA,
1662                 initial_plugin_paths, true);
1663         if (!cfg) {
1664                 goto error;
1665         }
1666
1667         cfg->cmd_data.print_ctf_metadata.path = g_string_new(NULL);
1668         if (!cfg->cmd_data.print_ctf_metadata.path) {
1669                 print_err_oom();
1670                 goto error;
1671         }
1672
1673         cfg->cmd_data.print_ctf_metadata.output_path = g_string_new(NULL);
1674         if (!cfg->cmd_data.print_ctf_metadata.output_path) {
1675                 print_err_oom();
1676                 goto error;
1677         }
1678
1679         goto end;
1680
1681 error:
1682         BT_OBJECT_PUT_REF_AND_RESET(cfg);
1683
1684 end:
1685         return cfg;
1686 }
1687
1688 static
1689 struct bt_config *bt_config_print_lttng_live_sessions_create(
1690                 const struct bt_value *initial_plugin_paths)
1691 {
1692         struct bt_config *cfg;
1693
1694         /* Create config */
1695         cfg = bt_config_base_create(BT_CONFIG_COMMAND_PRINT_LTTNG_LIVE_SESSIONS,
1696                 initial_plugin_paths, true);
1697         if (!cfg) {
1698                 goto error;
1699         }
1700
1701         cfg->cmd_data.print_lttng_live_sessions.url = g_string_new(NULL);
1702         if (!cfg->cmd_data.print_lttng_live_sessions.url) {
1703                 print_err_oom();
1704                 goto error;
1705         }
1706
1707         cfg->cmd_data.print_lttng_live_sessions.output_path =
1708                 g_string_new(NULL);
1709         if (!cfg->cmd_data.print_lttng_live_sessions.output_path) {
1710                 print_err_oom();
1711                 goto error;
1712         }
1713
1714         goto end;
1715
1716 error:
1717         BT_OBJECT_PUT_REF_AND_RESET(cfg);
1718
1719 end:
1720         return cfg;
1721 }
1722
1723 static
1724 int bt_config_append_plugin_paths_check_setuid_setgid(
1725                 struct bt_value *plugin_paths, const char *arg)
1726 {
1727         int ret = 0;
1728
1729         if (bt_common_is_setuid_setgid()) {
1730                 BT_LOGI_STR("Skipping non-system plugin paths for setuid/setgid binary.");
1731                 goto end;
1732         }
1733
1734         if (bt_config_append_plugin_paths(plugin_paths, arg)) {
1735                 printf_err("Invalid --plugin-path option's argument:\n    %s\n",
1736                         arg);
1737                 ret = -1;
1738                 goto end;
1739         }
1740
1741 end:
1742         return ret;
1743 }
1744
1745 /*
1746  * Prints the expected format for a --params option.
1747  */
1748 static
1749 void print_expected_params_format(FILE *fp)
1750 {
1751         fprintf(fp, "Expected format of PARAMS\n");
1752         fprintf(fp, "-------------------------\n");
1753         fprintf(fp, "\n");
1754         fprintf(fp, "    PARAM=VALUE[,PARAM=VALUE]...\n");
1755         fprintf(fp, "\n");
1756         fprintf(fp, "The parameter string is a comma-separated list of PARAM=VALUE assignments,\n");
1757         fprintf(fp, "where PARAM is the parameter name (C identifier plus the [:.-] characters),\n");
1758         fprintf(fp, "and VALUE can be one of:\n");
1759         fprintf(fp, "\n");
1760         fprintf(fp, "* `null`, `nul`, `NULL`: null value (no backticks).\n");
1761         fprintf(fp, "* `true`, `TRUE`, `yes`, `YES`: true boolean value (no backticks).\n");
1762         fprintf(fp, "* `false`, `FALSE`, `no`, `NO`: false boolean value (no backticks).\n");
1763         fprintf(fp, "* Binary (`0b` prefix), octal (`0` prefix), decimal, or hexadecimal\n");
1764         fprintf(fp, "  (`0x` prefix) signed 64-bit integer.\n");
1765         fprintf(fp, "* Double precision floating point number (scientific notation is accepted).\n");
1766         fprintf(fp, "* Unquoted string with no special characters, and not matching any of\n");
1767         fprintf(fp, "  the null and boolean value symbols above.\n");
1768         fprintf(fp, "* Double-quoted string (accepts escape characters).\n");
1769         fprintf(fp, "\n");
1770         fprintf(fp, "You can put whitespaces allowed around individual `=` and `,` symbols.\n");
1771         fprintf(fp, "\n");
1772         fprintf(fp, "Example:\n");
1773         fprintf(fp, "\n");
1774         fprintf(fp, "    many=null, fresh=yes, condition=false, squirrel=-782329,\n");
1775         fprintf(fp, "    observe=3.14, simple=beef, needs-quotes=\"some string\",\n");
1776         fprintf(fp, "    escape.chars-are:allowed=\"this is a \\\" double quote\"\n");
1777         fprintf(fp, "\n");
1778         fprintf(fp, "IMPORTANT: Make sure to single-quote the whole argument when you run\n");
1779         fprintf(fp, "babeltrace from a shell.\n");
1780 }
1781
1782
1783 /*
1784  * Prints the help command usage.
1785  */
1786 static
1787 void print_help_usage(FILE *fp)
1788 {
1789         fprintf(fp, "Usage: babeltrace [GENERAL OPTIONS] help [OPTIONS] PLUGIN\n");
1790         fprintf(fp, "       babeltrace [GENERAL OPTIONS] help [OPTIONS] TYPE.PLUGIN.CLS\n");
1791         fprintf(fp, "\n");
1792         fprintf(fp, "Options:\n");
1793         fprintf(fp, "\n");
1794         fprintf(fp, "      --omit-home-plugin-path       Omit home plugins from plugin search path\n");
1795         fprintf(fp, "                                    (~/.local/lib/babeltrace/plugins)\n");
1796         fprintf(fp, "      --omit-system-plugin-path     Omit system plugins from plugin search path\n");
1797         fprintf(fp, "      --plugin-path=PATH[:PATH]...  Add PATH to the list of paths from which\n");
1798         fprintf(fp, "                                    dynamic plugins can be loaded\n");
1799         fprintf(fp, "  -h, --help                        Show this help and quit\n");
1800         fprintf(fp, "\n");
1801         fprintf(fp, "See `babeltrace --help` for the list of general options.\n");
1802         fprintf(fp, "\n");
1803         fprintf(fp, "Use `babeltrace list-plugins` to show the list of available plugins.\n");
1804 }
1805
1806 static
1807 struct poptOption help_long_options[] = {
1808         /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
1809         { "help", 'h', POPT_ARG_NONE, NULL, OPT_HELP, NULL, NULL },
1810         { "omit-home-plugin-path", '\0', POPT_ARG_NONE, NULL, OPT_OMIT_HOME_PLUGIN_PATH, NULL, NULL },
1811         { "omit-system-plugin-path", '\0', POPT_ARG_NONE, NULL, OPT_OMIT_SYSTEM_PLUGIN_PATH, NULL, NULL },
1812         { "plugin-path", '\0', POPT_ARG_STRING, NULL, OPT_PLUGIN_PATH, NULL, NULL },
1813         { NULL, 0, '\0', NULL, 0, NULL, NULL },
1814 };
1815
1816 /*
1817  * Creates a Babeltrace config object from the arguments of a help
1818  * command.
1819  *
1820  * *retcode is set to the appropriate exit code to use.
1821  */
1822 static
1823 struct bt_config *bt_config_help_from_args(int argc, const char *argv[],
1824                 int *retcode, bool force_omit_system_plugin_path,
1825                 bool force_omit_home_plugin_path,
1826                 const struct bt_value *initial_plugin_paths)
1827 {
1828         poptContext pc = NULL;
1829         char *arg = NULL;
1830         int opt;
1831         int ret;
1832         struct bt_config *cfg = NULL;
1833         const char *leftover;
1834         char *plugin_name = NULL, *comp_cls_name = NULL;
1835
1836         *retcode = 0;
1837         cfg = bt_config_help_create(initial_plugin_paths);
1838         if (!cfg) {
1839                 goto error;
1840         }
1841
1842         cfg->omit_system_plugin_path = force_omit_system_plugin_path;
1843         cfg->omit_home_plugin_path = force_omit_home_plugin_path;
1844         ret = append_env_var_plugin_paths(cfg->plugin_paths);
1845         if (ret) {
1846                 goto error;
1847         }
1848
1849         /* Parse options */
1850         pc = poptGetContext(NULL, argc, (const char **) argv,
1851                 help_long_options, 0);
1852         if (!pc) {
1853                 printf_err("Cannot get popt context\n");
1854                 goto error;
1855         }
1856
1857         poptReadDefaultConfig(pc, 0);
1858
1859         while ((opt = poptGetNextOpt(pc)) > 0) {
1860                 arg = poptGetOptArg(pc);
1861
1862                 switch (opt) {
1863                 case OPT_PLUGIN_PATH:
1864                         if (bt_config_append_plugin_paths_check_setuid_setgid(
1865                                         cfg->plugin_paths, arg)) {
1866                                 goto error;
1867                         }
1868                         break;
1869                 case OPT_OMIT_SYSTEM_PLUGIN_PATH:
1870                         cfg->omit_system_plugin_path = true;
1871                         break;
1872                 case OPT_OMIT_HOME_PLUGIN_PATH:
1873                         cfg->omit_home_plugin_path = true;
1874                         break;
1875                 case OPT_HELP:
1876                         print_help_usage(stdout);
1877                         *retcode = -1;
1878                         BT_OBJECT_PUT_REF_AND_RESET(cfg);
1879                         goto end;
1880                 default:
1881                         printf_err("Unknown command-line option specified (option code %d)\n",
1882                                 opt);
1883                         goto error;
1884                 }
1885
1886                 free(arg);
1887                 arg = NULL;
1888         }
1889
1890         /* Check for option parsing error */
1891         if (opt < -1) {
1892                 printf_err("While parsing command-line options, at option %s: %s\n",
1893                         poptBadOption(pc, 0), poptStrerror(opt));
1894                 goto error;
1895         }
1896
1897         leftover = poptGetArg(pc);
1898         if (leftover) {
1899                 plugin_comp_cls_names(leftover, NULL,
1900                         &plugin_name, &comp_cls_name,
1901                         &cfg->cmd_data.help.cfg_component->type);
1902                 if (plugin_name && comp_cls_name) {
1903                         /* Component class help */
1904                         g_string_assign(
1905                                 cfg->cmd_data.help.cfg_component->plugin_name,
1906                                 plugin_name);
1907                         g_string_assign(
1908                                 cfg->cmd_data.help.cfg_component->comp_cls_name,
1909                                 comp_cls_name);
1910                 } else {
1911                         /* Fall back to plugin help */
1912                         g_string_assign(
1913                                 cfg->cmd_data.help.cfg_component->plugin_name,
1914                                 leftover);
1915                 }
1916         } else {
1917                 print_help_usage(stdout);
1918                 *retcode = -1;
1919                 BT_OBJECT_PUT_REF_AND_RESET(cfg);
1920                 goto end;
1921         }
1922
1923         if (append_home_and_system_plugin_paths_cfg(cfg)) {
1924                 goto error;
1925         }
1926
1927         goto end;
1928
1929 error:
1930         *retcode = 1;
1931         BT_OBJECT_PUT_REF_AND_RESET(cfg);
1932
1933 end:
1934         g_free(plugin_name);
1935         g_free(comp_cls_name);
1936
1937         if (pc) {
1938                 poptFreeContext(pc);
1939         }
1940
1941         free(arg);
1942         return cfg;
1943 }
1944
1945 /*
1946  * Prints the help command usage.
1947  */
1948 static
1949 void print_query_usage(FILE *fp)
1950 {
1951         fprintf(fp, "Usage: babeltrace [GEN OPTS] query [OPTS] TYPE.PLUGIN.CLS OBJECT\n");
1952         fprintf(fp, "\n");
1953         fprintf(fp, "Options:\n");
1954         fprintf(fp, "\n");
1955         fprintf(fp, "      --omit-home-plugin-path       Omit home plugins from plugin search path\n");
1956         fprintf(fp, "                                    (~/.local/lib/babeltrace/plugins)\n");
1957         fprintf(fp, "      --omit-system-plugin-path     Omit system plugins from plugin search path\n");
1958         fprintf(fp, "  -p, --params=PARAMS               Set the query parameters to PARAMS\n");
1959         fprintf(fp, "                                    (see the expected format of PARAMS below)\n");
1960         fprintf(fp, "      --plugin-path=PATH[:PATH]...  Add PATH to the list of paths from which\n");
1961         fprintf(fp, "                                    dynamic plugins can be loaded\n");
1962         fprintf(fp, "  -h, --help                        Show this help and quit\n");
1963         fprintf(fp, "\n\n");
1964         print_expected_params_format(fp);
1965 }
1966
1967 static
1968 struct poptOption query_long_options[] = {
1969         /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
1970         { "help", 'h', POPT_ARG_NONE, NULL, OPT_HELP, NULL, NULL },
1971         { "omit-home-plugin-path", '\0', POPT_ARG_NONE, NULL, OPT_OMIT_HOME_PLUGIN_PATH, NULL, NULL },
1972         { "omit-system-plugin-path", '\0', POPT_ARG_NONE, NULL, OPT_OMIT_SYSTEM_PLUGIN_PATH, NULL, NULL },
1973         { "params", 'p', POPT_ARG_STRING, NULL, OPT_PARAMS, NULL, NULL },
1974         { "plugin-path", '\0', POPT_ARG_STRING, NULL, OPT_PLUGIN_PATH, NULL, NULL },
1975         { NULL, 0, '\0', NULL, 0, NULL, NULL },
1976 };
1977
1978 /*
1979  * Creates a Babeltrace config object from the arguments of a query
1980  * command.
1981  *
1982  * *retcode is set to the appropriate exit code to use.
1983  */
1984 static
1985 struct bt_config *bt_config_query_from_args(int argc, const char *argv[],
1986                 int *retcode, bool force_omit_system_plugin_path,
1987                 bool force_omit_home_plugin_path,
1988                 const struct bt_value *initial_plugin_paths)
1989 {
1990         poptContext pc = NULL;
1991         char *arg = NULL;
1992         int opt;
1993         int ret;
1994         struct bt_config *cfg = NULL;
1995         const char *leftover;
1996         struct bt_value *params = bt_value_null;
1997
1998         *retcode = 0;
1999         cfg = bt_config_query_create(initial_plugin_paths);
2000         if (!cfg) {
2001                 goto error;
2002         }
2003
2004         cfg->omit_system_plugin_path = force_omit_system_plugin_path;
2005         cfg->omit_home_plugin_path = force_omit_home_plugin_path;
2006         ret = append_env_var_plugin_paths(cfg->plugin_paths);
2007         if (ret) {
2008                 goto error;
2009         }
2010
2011         /* Parse options */
2012         pc = poptGetContext(NULL, argc, (const char **) argv,
2013                 query_long_options, 0);
2014         if (!pc) {
2015                 printf_err("Cannot get popt context\n");
2016                 goto error;
2017         }
2018
2019         poptReadDefaultConfig(pc, 0);
2020
2021         while ((opt = poptGetNextOpt(pc)) > 0) {
2022                 arg = poptGetOptArg(pc);
2023
2024                 switch (opt) {
2025                 case OPT_PLUGIN_PATH:
2026                         if (bt_config_append_plugin_paths_check_setuid_setgid(
2027                                         cfg->plugin_paths, arg)) {
2028                                 goto error;
2029                         }
2030                         break;
2031                 case OPT_OMIT_SYSTEM_PLUGIN_PATH:
2032                         cfg->omit_system_plugin_path = true;
2033                         break;
2034                 case OPT_OMIT_HOME_PLUGIN_PATH:
2035                         cfg->omit_home_plugin_path = true;
2036                         break;
2037                 case OPT_PARAMS:
2038                 {
2039                         bt_object_put_ref(params);
2040                         params = bt_value_from_arg(arg);
2041                         if (!params) {
2042                                 printf_err("Invalid format for --params option's argument:\n    %s\n",
2043                                         arg);
2044                                 goto error;
2045                         }
2046                         break;
2047                 }
2048                 case OPT_HELP:
2049                         print_query_usage(stdout);
2050                         *retcode = -1;
2051                         BT_OBJECT_PUT_REF_AND_RESET(cfg);
2052                         goto end;
2053                 default:
2054                         printf_err("Unknown command-line option specified (option code %d)\n",
2055                                 opt);
2056                         goto error;
2057                 }
2058
2059                 free(arg);
2060                 arg = NULL;
2061         }
2062
2063         /* Check for option parsing error */
2064         if (opt < -1) {
2065                 printf_err("While parsing command-line options, at option %s: %s\n",
2066                         poptBadOption(pc, 0), poptStrerror(opt));
2067                 goto error;
2068         }
2069
2070         /*
2071          * We need exactly two leftover arguments which are the
2072          * mandatory component class specification and query object.
2073          */
2074         leftover = poptGetArg(pc);
2075         if (leftover) {
2076                 cfg->cmd_data.query.cfg_component =
2077                         bt_config_component_from_arg(leftover);
2078                 if (!cfg->cmd_data.query.cfg_component) {
2079                         printf_err("Invalid format for component class specification:\n    %s\n",
2080                                 leftover);
2081                         goto error;
2082                 }
2083
2084                 BT_ASSERT(params);
2085                 BT_OBJECT_MOVE_REF(cfg->cmd_data.query.cfg_component->params,
2086                         params);
2087         } else {
2088                 print_query_usage(stdout);
2089                 *retcode = -1;
2090                 BT_OBJECT_PUT_REF_AND_RESET(cfg);
2091                 goto end;
2092         }
2093
2094         leftover = poptGetArg(pc);
2095         if (leftover) {
2096                 if (strlen(leftover) == 0) {
2097                         printf_err("Invalid empty object\n");
2098                         goto error;
2099                 }
2100
2101                 g_string_assign(cfg->cmd_data.query.object, leftover);
2102         } else {
2103                 print_query_usage(stdout);
2104                 *retcode = -1;
2105                 BT_OBJECT_PUT_REF_AND_RESET(cfg);
2106                 goto end;
2107         }
2108
2109         leftover = poptGetArg(pc);
2110         if (leftover) {
2111                 printf_err("Unexpected argument: %s\n", leftover);
2112                 goto error;
2113         }
2114
2115         if (append_home_and_system_plugin_paths_cfg(cfg)) {
2116                 goto error;
2117         }
2118
2119         goto end;
2120
2121 error:
2122         *retcode = 1;
2123         BT_OBJECT_PUT_REF_AND_RESET(cfg);
2124
2125 end:
2126         if (pc) {
2127                 poptFreeContext(pc);
2128         }
2129
2130         bt_object_put_ref(params);
2131         free(arg);
2132         return cfg;
2133 }
2134
2135 /*
2136  * Prints the list-plugins command usage.
2137  */
2138 static
2139 void print_list_plugins_usage(FILE *fp)
2140 {
2141         fprintf(fp, "Usage: babeltrace [GENERAL OPTIONS] list-plugins [OPTIONS]\n");
2142         fprintf(fp, "\n");
2143         fprintf(fp, "Options:\n");
2144         fprintf(fp, "\n");
2145         fprintf(fp, "      --omit-home-plugin-path       Omit home plugins from plugin search path\n");
2146         fprintf(fp, "                                    (~/.local/lib/babeltrace/plugins)\n");
2147         fprintf(fp, "      --omit-system-plugin-path     Omit system plugins from plugin search path\n");
2148         fprintf(fp, "      --plugin-path=PATH[:PATH]...  Add PATH to the list of paths from which\n");
2149         fprintf(fp, "                                    dynamic plugins can be loaded\n");
2150         fprintf(fp, "  -h, --help                        Show this help and quit\n");
2151         fprintf(fp, "\n");
2152         fprintf(fp, "See `babeltrace --help` for the list of general options.\n");
2153         fprintf(fp, "\n");
2154         fprintf(fp, "Use `babeltrace help` to get help for a specific plugin or component class.\n");
2155 }
2156
2157 static
2158 struct poptOption list_plugins_long_options[] = {
2159         /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
2160         { "help", 'h', POPT_ARG_NONE, NULL, OPT_HELP, NULL, NULL },
2161         { "omit-home-plugin-path", '\0', POPT_ARG_NONE, NULL, OPT_OMIT_HOME_PLUGIN_PATH, NULL, NULL },
2162         { "omit-system-plugin-path", '\0', POPT_ARG_NONE, NULL, OPT_OMIT_SYSTEM_PLUGIN_PATH, NULL, NULL },
2163         { "plugin-path", '\0', POPT_ARG_STRING, NULL, OPT_PLUGIN_PATH, NULL, NULL },
2164         { NULL, 0, '\0', NULL, 0, NULL, NULL },
2165 };
2166
2167 /*
2168  * Creates a Babeltrace config object from the arguments of a
2169  * list-plugins command.
2170  *
2171  * *retcode is set to the appropriate exit code to use.
2172  */
2173 static
2174 struct bt_config *bt_config_list_plugins_from_args(int argc, const char *argv[],
2175                 int *retcode, bool force_omit_system_plugin_path,
2176                 bool force_omit_home_plugin_path,
2177                 const struct bt_value *initial_plugin_paths)
2178 {
2179         poptContext pc = NULL;
2180         char *arg = NULL;
2181         int opt;
2182         int ret;
2183         struct bt_config *cfg = NULL;
2184         const char *leftover;
2185
2186         *retcode = 0;
2187         cfg = bt_config_list_plugins_create(initial_plugin_paths);
2188         if (!cfg) {
2189                 goto error;
2190         }
2191
2192         cfg->omit_system_plugin_path = force_omit_system_plugin_path;
2193         cfg->omit_home_plugin_path = force_omit_home_plugin_path;
2194         ret = append_env_var_plugin_paths(cfg->plugin_paths);
2195         if (ret) {
2196                 goto error;
2197         }
2198
2199         /* Parse options */
2200         pc = poptGetContext(NULL, argc, (const char **) argv,
2201                 list_plugins_long_options, 0);
2202         if (!pc) {
2203                 printf_err("Cannot get popt context\n");
2204                 goto error;
2205         }
2206
2207         poptReadDefaultConfig(pc, 0);
2208
2209         while ((opt = poptGetNextOpt(pc)) > 0) {
2210                 arg = poptGetOptArg(pc);
2211
2212                 switch (opt) {
2213                 case OPT_PLUGIN_PATH:
2214                         if (bt_config_append_plugin_paths_check_setuid_setgid(
2215                                         cfg->plugin_paths, arg)) {
2216                                 goto error;
2217                         }
2218                         break;
2219                 case OPT_OMIT_SYSTEM_PLUGIN_PATH:
2220                         cfg->omit_system_plugin_path = true;
2221                         break;
2222                 case OPT_OMIT_HOME_PLUGIN_PATH:
2223                         cfg->omit_home_plugin_path = true;
2224                         break;
2225                 case OPT_HELP:
2226                         print_list_plugins_usage(stdout);
2227                         *retcode = -1;
2228                         BT_OBJECT_PUT_REF_AND_RESET(cfg);
2229                         goto end;
2230                 default:
2231                         printf_err("Unknown command-line option specified (option code %d)\n",
2232                                 opt);
2233                         goto error;
2234                 }
2235
2236                 free(arg);
2237                 arg = NULL;
2238         }
2239
2240         /* Check for option parsing error */
2241         if (opt < -1) {
2242                 printf_err("While parsing command-line options, at option %s: %s\n",
2243                         poptBadOption(pc, 0), poptStrerror(opt));
2244                 goto error;
2245         }
2246
2247         leftover = poptGetArg(pc);
2248         if (leftover) {
2249                 printf_err("Unexpected argument: %s\n", leftover);
2250                 goto error;
2251         }
2252
2253         if (append_home_and_system_plugin_paths_cfg(cfg)) {
2254                 goto error;
2255         }
2256
2257         goto end;
2258
2259 error:
2260         *retcode = 1;
2261         BT_OBJECT_PUT_REF_AND_RESET(cfg);
2262
2263 end:
2264         if (pc) {
2265                 poptFreeContext(pc);
2266         }
2267
2268         free(arg);
2269         return cfg;
2270 }
2271
2272 /*
2273  * Prints the run command usage.
2274  */
2275 static
2276 void print_run_usage(FILE *fp)
2277 {
2278         fprintf(fp, "Usage: babeltrace [GENERAL OPTIONS] run [OPTIONS]\n");
2279         fprintf(fp, "\n");
2280         fprintf(fp, "Options:\n");
2281         fprintf(fp, "\n");
2282         fprintf(fp, "  -b, --base-params=PARAMS          Set PARAMS as the current base parameters\n");
2283         fprintf(fp, "                                    for all the following components until\n");
2284         fprintf(fp, "                                    --reset-base-params is encountered\n");
2285         fprintf(fp, "                                    (see the expected format of PARAMS below)\n");
2286         fprintf(fp, "  -c, --component=[NAME:]TYPE.PLUGIN.CLS\n");
2287         fprintf(fp, "                                    Instantiate the component class CLS of type\n");
2288         fprintf(fp, "                                    TYPE (`source`, `filter`, or `sink`) found\n");
2289         fprintf(fp, "                                    in the plugin PLUGIN, add it to the graph,\n");
2290         fprintf(fp, "                                    and optionally name it NAME (you can also\n");
2291         fprintf(fp, "                                    specify the name with --name)\n");
2292         fprintf(fp, "  -C, --connect=CONNECTION          Connect two created components (see the\n");
2293         fprintf(fp, "                                    expected format of CONNECTION below)\n");
2294         fprintf(fp, "      --key=KEY                     Set the current initialization string\n");
2295         fprintf(fp, "                                    parameter key to KEY (see --value)\n");
2296         fprintf(fp, "  -n, --name=NAME                   Set the name of the current component\n");
2297         fprintf(fp, "                                    to NAME (must be unique amongst all the\n");
2298         fprintf(fp, "                                    names of the created components)\n");
2299         fprintf(fp, "      --omit-home-plugin-path       Omit home plugins from plugin search path\n");
2300         fprintf(fp, "                                    (~/.local/lib/babeltrace/plugins)\n");
2301         fprintf(fp, "      --omit-system-plugin-path     Omit system plugins from plugin search path\n");
2302         fprintf(fp, "  -p, --params=PARAMS               Add initialization parameters PARAMS to the\n");
2303         fprintf(fp, "                                    current component (see the expected format\n");
2304         fprintf(fp, "                                    of PARAMS below)\n");
2305         fprintf(fp, "      --plugin-path=PATH[:PATH]...  Add PATH to the list of paths from which\n");
2306         fprintf(fp, "                                    dynamic plugins can be loaded\n");
2307         fprintf(fp, "  -r, --reset-base-params           Reset the current base parameters to an\n");
2308         fprintf(fp, "                                    empty map\n");
2309         fprintf(fp, "      --retry-duration=DUR          When babeltrace(1) needs to retry to run\n");
2310         fprintf(fp, "                                    the graph later, retry in DUR µs\n");
2311         fprintf(fp, "                                    (default: 100000)\n");
2312         fprintf(fp, "      --value=VAL                   Add a string initialization parameter to\n");
2313         fprintf(fp, "                                    the current component with a name given by\n");
2314         fprintf(fp, "                                    the last argument of the --key option and a\n");
2315         fprintf(fp, "                                    value set to VAL\n");
2316         fprintf(fp, "  -h, --help                        Show this help and quit\n");
2317         fprintf(fp, "\n");
2318         fprintf(fp, "See `babeltrace --help` for the list of general options.\n");
2319         fprintf(fp, "\n\n");
2320         fprintf(fp, "Expected format of CONNECTION\n");
2321         fprintf(fp, "-----------------------------\n");
2322         fprintf(fp, "\n");
2323         fprintf(fp, "    UPSTREAM[.UPSTREAM-PORT]:DOWNSTREAM[.DOWNSTREAM-PORT]\n");
2324         fprintf(fp, "\n");
2325         fprintf(fp, "UPSTREAM and DOWNSTREAM are names of the upstream and downstream\n");
2326         fprintf(fp, "components to connect together. You must escape the following characters\n\n");
2327         fprintf(fp, "with `\\`: `\\`, `.`, and `:`. You can set the name of the current\n");
2328         fprintf(fp, "component with the --name option.\n");
2329         fprintf(fp, "\n");
2330         fprintf(fp, "UPSTREAM-PORT and DOWNSTREAM-PORT are optional globbing patterns to\n");
2331         fprintf(fp, "identify the upstream and downstream ports to use for the connection.\n");
2332         fprintf(fp, "When the port is not specified, `*` is used.\n");
2333         fprintf(fp, "\n");
2334         fprintf(fp, "When a component named UPSTREAM has an available port which matches the\n");
2335         fprintf(fp, "UPSTREAM-PORT globbing pattern, it is connected to the first port which\n");
2336         fprintf(fp, "matches the DOWNSTREAM-PORT globbing pattern of the component named\n");
2337         fprintf(fp, "DOWNSTREAM.\n");
2338         fprintf(fp, "\n");
2339         fprintf(fp, "The only special character in UPSTREAM-PORT and DOWNSTREAM-PORT is `*`\n");
2340         fprintf(fp, "which matches anything. You must escape the following characters\n");
2341         fprintf(fp, "with `\\`: `\\`, `*`, `?`, `[`, `.`, and `:`.\n");
2342         fprintf(fp, "\n");
2343         fprintf(fp, "You can connect a source component to a filter or sink component. You\n");
2344         fprintf(fp, "can connect a filter component to a sink component.\n");
2345         fprintf(fp, "\n");
2346         fprintf(fp, "Examples:\n");
2347         fprintf(fp, "\n");
2348         fprintf(fp, "    my-src:my-sink\n");
2349         fprintf(fp, "    ctf-fs.*stream*:utils-muxer:*\n");
2350         fprintf(fp, "\n");
2351         fprintf(fp, "IMPORTANT: Make sure to single-quote the whole argument when you run\n");
2352         fprintf(fp, "babeltrace from a shell.\n");
2353         fprintf(fp, "\n\n");
2354         print_expected_params_format(fp);
2355 }
2356
2357 /*
2358  * Creates a Babeltrace config object from the arguments of a run
2359  * command.
2360  *
2361  * *retcode is set to the appropriate exit code to use.
2362  */
2363 static
2364 struct bt_config *bt_config_run_from_args(int argc, const char *argv[],
2365                 int *retcode, bool force_omit_system_plugin_path,
2366                 bool force_omit_home_plugin_path,
2367                 const struct bt_value *initial_plugin_paths)
2368 {
2369         poptContext pc = NULL;
2370         char *arg = NULL;
2371         struct bt_config_component *cur_cfg_comp = NULL;
2372         enum bt_config_component_dest cur_cfg_comp_dest =
2373                         BT_CONFIG_COMPONENT_DEST_UNKNOWN;
2374         struct bt_value *cur_base_params = NULL;
2375         int opt, ret = 0;
2376         struct bt_config *cfg = NULL;
2377         struct bt_value *instance_names = NULL;
2378         struct bt_value *connection_args = NULL;
2379         GString *cur_param_key = NULL;
2380         char error_buf[256] = { 0 };
2381         long retry_duration = -1;
2382         enum bt_value_status status;
2383         struct poptOption run_long_options[] = {
2384                 { "base-params", 'b', POPT_ARG_STRING, NULL, OPT_BASE_PARAMS, NULL, NULL },
2385                 { "component", 'c', POPT_ARG_STRING, NULL, OPT_COMPONENT, NULL, NULL },
2386                 { "connect", 'C', POPT_ARG_STRING, NULL, OPT_CONNECT, NULL, NULL },
2387                 { "help", 'h', POPT_ARG_NONE, NULL, OPT_HELP, NULL, NULL },
2388                 { "key", '\0', POPT_ARG_STRING, NULL, OPT_KEY, NULL, NULL },
2389                 { "name", 'n', POPT_ARG_STRING, NULL, OPT_NAME, NULL, NULL },
2390                 { "omit-home-plugin-path", '\0', POPT_ARG_NONE, NULL, OPT_OMIT_HOME_PLUGIN_PATH, NULL, NULL },
2391                 { "omit-system-plugin-path", '\0', POPT_ARG_NONE, NULL, OPT_OMIT_SYSTEM_PLUGIN_PATH, NULL, NULL },
2392                 { "params", 'p', POPT_ARG_STRING, NULL, OPT_PARAMS, NULL, NULL },
2393                 { "plugin-path", '\0', POPT_ARG_STRING, NULL, OPT_PLUGIN_PATH, NULL, NULL },
2394                 { "reset-base-params", 'r', POPT_ARG_NONE, NULL, OPT_RESET_BASE_PARAMS, NULL, NULL },
2395                 { "retry-duration", '\0', POPT_ARG_LONG, &retry_duration, OPT_RETRY_DURATION, NULL, NULL },
2396                 { "value", '\0', POPT_ARG_STRING, NULL, OPT_VALUE, NULL, NULL },
2397                 { NULL, 0, '\0', NULL, 0, NULL, NULL },
2398         };
2399
2400         *retcode = 0;
2401         cur_param_key = g_string_new(NULL);
2402         if (!cur_param_key) {
2403                 print_err_oom();
2404                 goto error;
2405         }
2406
2407         if (argc <= 1) {
2408                 print_run_usage(stdout);
2409                 *retcode = -1;
2410                 goto end;
2411         }
2412
2413         cfg = bt_config_run_create(initial_plugin_paths);
2414         if (!cfg) {
2415                 goto error;
2416         }
2417
2418         cfg->cmd_data.run.retry_duration_us = 100000;
2419         cfg->omit_system_plugin_path = force_omit_system_plugin_path;
2420         cfg->omit_home_plugin_path = force_omit_home_plugin_path;
2421         cur_base_params = bt_value_map_create();
2422         if (!cur_base_params) {
2423                 print_err_oom();
2424                 goto error;
2425         }
2426
2427         instance_names = bt_value_map_create();
2428         if (!instance_names) {
2429                 print_err_oom();
2430                 goto error;
2431         }
2432
2433         connection_args = bt_value_array_create();
2434         if (!connection_args) {
2435                 print_err_oom();
2436                 goto error;
2437         }
2438
2439         ret = append_env_var_plugin_paths(cfg->plugin_paths);
2440         if (ret) {
2441                 goto error;
2442         }
2443
2444         /* Parse options */
2445         pc = poptGetContext(NULL, argc, (const char **) argv,
2446                 run_long_options, 0);
2447         if (!pc) {
2448                 printf_err("Cannot get popt context\n");
2449                 goto error;
2450         }
2451
2452         poptReadDefaultConfig(pc, 0);
2453
2454         while ((opt = poptGetNextOpt(pc)) > 0) {
2455                 arg = poptGetOptArg(pc);
2456
2457                 switch (opt) {
2458                 case OPT_PLUGIN_PATH:
2459                         if (bt_config_append_plugin_paths_check_setuid_setgid(
2460                                         cfg->plugin_paths, arg)) {
2461                                 goto error;
2462                         }
2463                         break;
2464                 case OPT_OMIT_SYSTEM_PLUGIN_PATH:
2465                         cfg->omit_system_plugin_path = true;
2466                         break;
2467                 case OPT_OMIT_HOME_PLUGIN_PATH:
2468                         cfg->omit_home_plugin_path = true;
2469                         break;
2470                 case OPT_COMPONENT:
2471                 {
2472                         enum bt_config_component_dest new_dest;
2473
2474                         if (cur_cfg_comp) {
2475                                 ret = add_run_cfg_comp_check_name(cfg,
2476                                         cur_cfg_comp, cur_cfg_comp_dest,
2477                                         instance_names);
2478                                 BT_OBJECT_PUT_REF_AND_RESET(cur_cfg_comp);
2479                                 if (ret) {
2480                                         goto error;
2481                                 }
2482                         }
2483
2484                         cur_cfg_comp = bt_config_component_from_arg(arg);
2485                         if (!cur_cfg_comp) {
2486                                 printf_err("Invalid format for --component option's argument:\n    %s\n",
2487                                         arg);
2488                                 goto error;
2489                         }
2490
2491                         switch (cur_cfg_comp->type) {
2492                         case BT_COMPONENT_CLASS_TYPE_SOURCE:
2493                                 new_dest = BT_CONFIG_COMPONENT_DEST_SOURCE;
2494                                 break;
2495                         case BT_COMPONENT_CLASS_TYPE_FILTER:
2496                                 new_dest = BT_CONFIG_COMPONENT_DEST_FILTER;
2497                                 break;
2498                         case BT_COMPONENT_CLASS_TYPE_SINK:
2499                                 new_dest = BT_CONFIG_COMPONENT_DEST_SINK;
2500                                 break;
2501                         default:
2502                                 abort();
2503                         }
2504
2505                         BT_ASSERT(cur_base_params);
2506                         bt_object_put_ref(cur_cfg_comp->params);
2507                         status = bt_value_copy(
2508                                 &cur_cfg_comp->params,
2509                                 cur_base_params);
2510                         if (status != BT_VALUE_STATUS_OK) {
2511                                 print_err_oom();
2512                                 goto error;
2513                         }
2514
2515                         cur_cfg_comp_dest = new_dest;
2516                         break;
2517                 }
2518                 case OPT_PARAMS:
2519                 {
2520                         struct bt_value *params;
2521                         struct bt_value *params_to_set;
2522
2523                         if (!cur_cfg_comp) {
2524                                 printf_err("Cannot add parameters to unavailable component:\n    %s\n",
2525                                         arg);
2526                                 goto error;
2527                         }
2528
2529                         params = bt_value_from_arg(arg);
2530                         if (!params) {
2531                                 printf_err("Invalid format for --params option's argument:\n    %s\n",
2532                                         arg);
2533                                 goto error;
2534                         }
2535
2536                         status = bt_value_map_extend(&params_to_set,
2537                                 cur_cfg_comp->params,
2538                                 params);
2539                         BT_OBJECT_PUT_REF_AND_RESET(params);
2540                         if (status != BT_VALUE_STATUS_OK) {
2541                                 printf_err("Cannot extend current component parameters with --params option's argument:\n    %s\n",
2542                                         arg);
2543                                 goto error;
2544                         }
2545
2546                         BT_OBJECT_MOVE_REF(cur_cfg_comp->params, params_to_set);
2547                         break;
2548                 }
2549                 case OPT_KEY:
2550                         if (strlen(arg) == 0) {
2551                                 printf_err("Cannot set an empty string as the current parameter key\n");
2552                                 goto error;
2553                         }
2554
2555                         g_string_assign(cur_param_key, arg);
2556                         break;
2557                 case OPT_VALUE:
2558                         if (!cur_cfg_comp) {
2559                                 printf_err("Cannot set a parameter's value of unavailable component:\n    %s\n",
2560                                         arg);
2561                                 goto error;
2562                         }
2563
2564                         if (cur_param_key->len == 0) {
2565                                 printf_err("--value option specified without preceding --key option:\n    %s\n",
2566                                         arg);
2567                                 goto error;
2568                         }
2569
2570                         if (bt_value_map_insert_string_entry(cur_cfg_comp->params,
2571                                         cur_param_key->str, arg)) {
2572                                 print_err_oom();
2573                                 goto error;
2574                         }
2575                         break;
2576                 case OPT_NAME:
2577                         if (!cur_cfg_comp) {
2578                                 printf_err("Cannot set the name of unavailable component:\n    %s\n",
2579                                         arg);
2580                                 goto error;
2581                         }
2582
2583                         g_string_assign(cur_cfg_comp->instance_name, arg);
2584                         break;
2585                 case OPT_BASE_PARAMS:
2586                 {
2587                         struct bt_value *params =
2588                                 bt_value_from_arg(arg);
2589
2590                         if (!params) {
2591                                 printf_err("Invalid format for --base-params option's argument:\n    %s\n",
2592                                         arg);
2593                                 goto error;
2594                         }
2595
2596                         BT_OBJECT_MOVE_REF(cur_base_params, params);
2597                         break;
2598                 }
2599                 case OPT_RESET_BASE_PARAMS:
2600                         BT_OBJECT_PUT_REF_AND_RESET(cur_base_params);
2601                         cur_base_params = bt_value_map_create();
2602                         if (!cur_base_params) {
2603                                 print_err_oom();
2604                                 goto error;
2605                         }
2606                         break;
2607                 case OPT_CONNECT:
2608                         if (bt_value_array_append_string_element(
2609                                         connection_args, arg)) {
2610                                 print_err_oom();
2611                                 goto error;
2612                         }
2613                         break;
2614                 case OPT_RETRY_DURATION:
2615                         if (retry_duration < 0) {
2616                                 printf_err("--retry-duration option's argument must be positive or 0: %ld\n",
2617                                         retry_duration);
2618                                 goto error;
2619                         }
2620
2621                         cfg->cmd_data.run.retry_duration_us =
2622                                 (uint64_t) retry_duration;
2623                         break;
2624                 case OPT_HELP:
2625                         print_run_usage(stdout);
2626                         *retcode = -1;
2627                         BT_OBJECT_PUT_REF_AND_RESET(cfg);
2628                         goto end;
2629                 default:
2630                         printf_err("Unknown command-line option specified (option code %d)\n",
2631                                 opt);
2632                         goto error;
2633                 }
2634
2635                 free(arg);
2636                 arg = NULL;
2637         }
2638
2639         /* Check for option parsing error */
2640         if (opt < -1) {
2641                 printf_err("While parsing command-line options, at option %s: %s\n",
2642                         poptBadOption(pc, 0), poptStrerror(opt));
2643                 goto error;
2644         }
2645
2646         /* This command does not accept leftover arguments */
2647         if (poptPeekArg(pc)) {
2648                 printf_err("Unexpected argument: %s\n", poptPeekArg(pc));
2649                 goto error;
2650         }
2651
2652         /* Add current component */
2653         if (cur_cfg_comp) {
2654                 ret = add_run_cfg_comp_check_name(cfg, cur_cfg_comp,
2655                         cur_cfg_comp_dest, instance_names);
2656                 BT_OBJECT_PUT_REF_AND_RESET(cur_cfg_comp);
2657                 if (ret) {
2658                         goto error;
2659                 }
2660         }
2661
2662         if (cfg->cmd_data.run.sources->len == 0) {
2663                 printf_err("Incomplete graph: no source component\n");
2664                 goto error;
2665         }
2666
2667         if (cfg->cmd_data.run.sinks->len == 0) {
2668                 printf_err("Incomplete graph: no sink component\n");
2669                 goto error;
2670         }
2671
2672         if (append_home_and_system_plugin_paths_cfg(cfg)) {
2673                 goto error;
2674         }
2675
2676         ret = bt_config_cli_args_create_connections(cfg,
2677                 connection_args,
2678                 error_buf, 256);
2679         if (ret) {
2680                 printf_err("Cannot creation connections:\n%s", error_buf);
2681                 goto error;
2682         }
2683
2684         goto end;
2685
2686 error:
2687         *retcode = 1;
2688         BT_OBJECT_PUT_REF_AND_RESET(cfg);
2689
2690 end:
2691         if (pc) {
2692                 poptFreeContext(pc);
2693         }
2694
2695         if (cur_param_key) {
2696                 g_string_free(cur_param_key, TRUE);
2697         }
2698
2699         free(arg);
2700         BT_OBJECT_PUT_REF_AND_RESET(cur_cfg_comp);
2701         BT_OBJECT_PUT_REF_AND_RESET(cur_base_params);
2702         BT_OBJECT_PUT_REF_AND_RESET(instance_names);
2703         BT_OBJECT_PUT_REF_AND_RESET(connection_args);
2704         return cfg;
2705 }
2706
2707 static
2708 struct bt_config *bt_config_run_from_args_array(const struct bt_value *run_args,
2709                 int *retcode, bool force_omit_system_plugin_path,
2710                 bool force_omit_home_plugin_path,
2711                 const struct bt_value *initial_plugin_paths)
2712 {
2713         struct bt_config *cfg = NULL;
2714         const char **argv;
2715         int64_t i, len;
2716         const size_t argc = bt_value_array_get_size(run_args) + 1;
2717
2718         argv = calloc(argc, sizeof(*argv));
2719         if (!argv) {
2720                 print_err_oom();
2721                 goto end;
2722         }
2723
2724         argv[0] = "run";
2725
2726         len = bt_value_array_get_size(run_args);
2727         if (len < 0) {
2728                 printf_err("Invalid executable arguments\n");
2729                 goto end;
2730         }
2731         for (i = 0; i < len; i++) {
2732                 const struct bt_value *arg_value =
2733                         bt_value_array_borrow_element_by_index_const(run_args,
2734                                                                      i);
2735                 const char *arg;
2736
2737                 BT_ASSERT(arg_value);
2738                 arg = bt_value_string_get(arg_value);
2739                 BT_ASSERT(arg);
2740                 argv[i + 1] = arg;
2741         }
2742
2743         cfg = bt_config_run_from_args(argc, argv, retcode,
2744                 force_omit_system_plugin_path, force_omit_home_plugin_path,
2745                 initial_plugin_paths);
2746
2747 end:
2748         free(argv);
2749         return cfg;
2750 }
2751
2752 /*
2753  * Prints the convert command usage.
2754  */
2755 static
2756 void print_convert_usage(FILE *fp)
2757 {
2758         fprintf(fp, "Usage: babeltrace [GENERAL OPTIONS] [convert] [OPTIONS] [PATH/URL]\n");
2759         fprintf(fp, "\n");
2760         fprintf(fp, "Options:\n");
2761         fprintf(fp, "\n");
2762         fprintf(fp, "  -c, --component=[NAME:]TYPE.PLUGIN.CLS\n");
2763         fprintf(fp, "                                    Instantiate the component class CLS of type\n");
2764         fprintf(fp, "                                    TYPE (`source`, `filter`, or `sink`) found\n");
2765         fprintf(fp, "                                    in the plugin PLUGIN, add it to the\n");
2766         fprintf(fp, "                                    conversion graph, and optionally name it\n");
2767         fprintf(fp, "                                    NAME (you can also specify the name with\n");
2768         fprintf(fp, "                                    --name)\n");
2769         fprintf(fp, "      --name=NAME                   Set the name of the current component\n");
2770         fprintf(fp, "                                    to NAME (must be unique amongst all the\n");
2771         fprintf(fp, "                                    names of the created components)\n");
2772         fprintf(fp, "      --omit-home-plugin-path       Omit home plugins from plugin search path\n");
2773         fprintf(fp, "                                    (~/.local/lib/babeltrace/plugins)\n");
2774         fprintf(fp, "      --omit-system-plugin-path     Omit system plugins from plugin search path\n");
2775         fprintf(fp, "  -p, --params=PARAMS               Add initialization parameters PARAMS to the\n");
2776         fprintf(fp, "                                    current component (see the expected format\n");
2777         fprintf(fp, "                                    of PARAMS below)\n");
2778         fprintf(fp, "  -P, --path=PATH                   Set the `path` string parameter of the\n");
2779         fprintf(fp, "                                    current component to PATH\n");
2780         fprintf(fp, "      --plugin-path=PATH[:PATH]...  Add PATH to the list of paths from which\n");
2781         fprintf(fp, "      --retry-duration=DUR          When babeltrace(1) needs to retry to run\n");
2782         fprintf(fp, "                                    the graph later, retry in DUR µs\n");
2783         fprintf(fp, "                                    (default: 100000)\n");
2784         fprintf(fp, "                                    dynamic plugins can be loaded\n");
2785         fprintf(fp, "      --run-args                    Print the equivalent arguments for the\n");
2786         fprintf(fp, "                                    `run` command to the standard output,\n");
2787         fprintf(fp, "                                    formatted for a shell, and quit\n");
2788         fprintf(fp, "      --run-args-0                  Print the equivalent arguments for the\n");
2789         fprintf(fp, "                                    `run` command to the standard output,\n");
2790         fprintf(fp, "                                    formatted for `xargs -0`, and quit\n");
2791         fprintf(fp, "      --stream-intersection         Only process events when all streams\n");
2792         fprintf(fp, "                                    are active\n");
2793         fprintf(fp, "  -u, --url=URL                     Set the `url` string parameter of the\n");
2794         fprintf(fp, "                                    current component to URL\n");
2795         fprintf(fp, "  -h, --help                        Show this help and quit\n");
2796         fprintf(fp, "\n");
2797         fprintf(fp, "Implicit `source.ctf.fs` component options:\n");
2798         fprintf(fp, "\n");
2799         fprintf(fp, "      --clock-offset=SEC            Set clock offset to SEC seconds\n");
2800         fprintf(fp, "      --clock-offset-ns=NS          Set clock offset to NS ns\n");
2801         fprintf(fp, "\n");
2802         fprintf(fp, "Implicit `sink.text.pretty` component options:\n");
2803         fprintf(fp, "\n");
2804         fprintf(fp, "      --clock-cycles                Print timestamps in clock cycles\n");
2805         fprintf(fp, "      --clock-date                  Print timestamp dates\n");
2806         fprintf(fp, "      --clock-gmt                   Print and parse timestamps in the GMT\n");
2807         fprintf(fp, "                                    time zone instead of the local time zone\n");
2808         fprintf(fp, "      --clock-seconds               Print the timestamps as `SEC.NS` instead\n");
2809         fprintf(fp, "                                    of `hh:mm:ss.nnnnnnnnn`\n");
2810         fprintf(fp, "      --color=(never | auto | always)\n");
2811         fprintf(fp, "                                    Never, automatically, or always emit\n");
2812         fprintf(fp, "                                    console color codes\n");
2813         fprintf(fp, "  -f, --fields=FIELD[,FIELD]...     Print additional fields; FIELD can be:\n");
2814         fprintf(fp, "                                      `all`, `trace`, `trace:hostname`,\n");
2815         fprintf(fp, "                                      `trace:domain`, `trace:procname`,\n");
2816         fprintf(fp, "                                      `trace:vpid`, `loglevel`, `emf`\n");
2817         fprintf(fp, "  -n, --names=NAME[,NAME]...        Print field names; NAME can be:\n");
2818         fprintf(fp, "                                      `payload` (or `arg` or `args`), `none`,\n");
2819         fprintf(fp, "                                      `all`, `scope`, `header`, `context`\n");
2820         fprintf(fp, "                                      (or `ctx`)\n");
2821         fprintf(fp, "      --no-delta                    Do not print time delta between\n");
2822         fprintf(fp, "                                    consecutive events\n");
2823         fprintf(fp, "  -w, --output=PATH                 Write output text to PATH instead of\n");
2824         fprintf(fp, "                                    the standard output\n");
2825         fprintf(fp, "\n");
2826         fprintf(fp, "Implicit `filter.utils.muxer` component options:\n");
2827         fprintf(fp, "\n");
2828         fprintf(fp, "      --clock-force-correlate       Assume that clocks are inherently\n");
2829         fprintf(fp, "                                    correlated across traces\n");
2830         fprintf(fp, "\n");
2831         fprintf(fp, "Implicit `filter.utils.trimmer` component options:\n");
2832         fprintf(fp, "\n");
2833         fprintf(fp, "  -b, --begin=BEGIN                 Set the beginning time of the conversion\n");
2834         fprintf(fp, "                                    time range to BEGIN (see the format of\n");
2835         fprintf(fp, "                                    BEGIN below)\n");
2836         fprintf(fp, "  -e, --end=END                     Set the end time of the conversion time\n");
2837         fprintf(fp, "                                    range to END (see the format of END below)\n");
2838         fprintf(fp, "  -t, --timerange=TIMERANGE         Set conversion time range to TIMERANGE:\n");
2839         fprintf(fp, "                                    BEGIN,END or [BEGIN,END] (literally `[` and\n");
2840         fprintf(fp, "                                    `]`) (see the format of BEGIN/END below)\n");
2841         fprintf(fp, "\n");
2842         fprintf(fp, "Implicit `filter.lttng-utils.debug-info` component options:\n");
2843         fprintf(fp, "\n");
2844         fprintf(fp, "      --debug-info                  Create an implicit\n");
2845         fprintf(fp, "                                    `filter.lttng-utils.debug-info` component\n");
2846         fprintf(fp, "      --debug-info-dir=DIR          Search for debug info in directory DIR\n");
2847         fprintf(fp, "                                    instead of `/usr/lib/debug`\n");
2848         fprintf(fp, "      --debug-info-full-path        Show full debug info source and\n");
2849         fprintf(fp, "                                    binary paths instead of just names\n");
2850         fprintf(fp, "      --debug-info-target-prefix=DIR\n");
2851         fprintf(fp, "                                    Use directory DIR as a prefix when\n");
2852         fprintf(fp, "                                    looking up executables during debug\n");
2853         fprintf(fp, "                                    info analysis\n");
2854         fprintf(fp, "\n");
2855         fprintf(fp, "Legacy options that still work:\n");
2856         fprintf(fp, "\n");
2857         fprintf(fp, "  -i, --input-format=(ctf | lttng-live)\n");
2858         fprintf(fp, "                                    `ctf`:\n");
2859         fprintf(fp, "                                      Create an implicit `source.ctf.fs`\n");
2860         fprintf(fp, "                                      component\n");
2861         fprintf(fp, "                                    `lttng-live`:\n");
2862         fprintf(fp, "                                      Create an implicit `source.ctf.lttng-live`\n");
2863         fprintf(fp, "                                      component\n");
2864         fprintf(fp, "  -o, --output-format=(text | ctf | dummy | ctf-metadata)\n");
2865         fprintf(fp, "                                    `text`:\n");
2866         fprintf(fp, "                                      Create an implicit `sink.text.pretty`\n");
2867         fprintf(fp, "                                      component\n");
2868         fprintf(fp, "                                    `ctf`:\n");
2869         fprintf(fp, "                                      Create an implicit `sink.ctf.fs`\n");
2870         fprintf(fp, "                                      component\n");
2871         fprintf(fp, "                                    `dummy`:\n");
2872         fprintf(fp, "                                      Create an implicit `sink.utils.dummy`\n");
2873         fprintf(fp, "                                      component\n");
2874         fprintf(fp, "                                    `ctf-metadata`:\n");
2875         fprintf(fp, "                                      Query the `source.ctf.fs` component class\n");
2876         fprintf(fp, "                                      for metadata text and quit\n");
2877         fprintf(fp, "\n");
2878         fprintf(fp, "See `babeltrace --help` for the list of general options.\n");
2879         fprintf(fp, "\n\n");
2880         fprintf(fp, "Format of BEGIN and END\n");
2881         fprintf(fp, "-----------------------\n");
2882         fprintf(fp, "\n");
2883         fprintf(fp, "    [YYYY-MM-DD [hh:mm:]]ss[.nnnnnnnnn]\n");
2884         fprintf(fp, "\n\n");
2885         print_expected_params_format(fp);
2886 }
2887
2888 static
2889 struct poptOption convert_long_options[] = {
2890         /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
2891         { "begin", 'b', POPT_ARG_STRING, NULL, OPT_BEGIN, NULL, NULL },
2892         { "clock-cycles", '\0', POPT_ARG_NONE, NULL, OPT_CLOCK_CYCLES, NULL, NULL },
2893         { "clock-date", '\0', POPT_ARG_NONE, NULL, OPT_CLOCK_DATE, NULL, NULL },
2894         { "clock-force-correlate", '\0', POPT_ARG_NONE, NULL, OPT_CLOCK_FORCE_CORRELATE, NULL, NULL },
2895         { "clock-gmt", '\0', POPT_ARG_NONE, NULL, OPT_CLOCK_GMT, NULL, NULL },
2896         { "clock-offset", '\0', POPT_ARG_STRING, NULL, OPT_CLOCK_OFFSET, NULL, NULL },
2897         { "clock-offset-ns", '\0', POPT_ARG_STRING, NULL, OPT_CLOCK_OFFSET_NS, NULL, NULL },
2898         { "clock-seconds", '\0', POPT_ARG_NONE, NULL, OPT_CLOCK_SECONDS, NULL, NULL },
2899         { "color", '\0', POPT_ARG_STRING, NULL, OPT_COLOR, NULL, NULL },
2900         { "component", 'c', POPT_ARG_STRING, NULL, OPT_COMPONENT, NULL, NULL },
2901         { "debug", 'd', POPT_ARG_NONE, NULL, OPT_DEBUG, NULL, NULL },
2902         { "debug-info-dir", 0, POPT_ARG_STRING, NULL, OPT_DEBUG_INFO_DIR, NULL, NULL },
2903         { "debug-info-full-path", 0, POPT_ARG_NONE, NULL, OPT_DEBUG_INFO_FULL_PATH, NULL, NULL },
2904         { "debug-info-target-prefix", 0, POPT_ARG_STRING, NULL, OPT_DEBUG_INFO_TARGET_PREFIX, NULL, NULL },
2905         { "end", 'e', POPT_ARG_STRING, NULL, OPT_END, NULL, NULL },
2906         { "fields", 'f', POPT_ARG_STRING, NULL, OPT_FIELDS, NULL, NULL },
2907         { "help", 'h', POPT_ARG_NONE, NULL, OPT_HELP, NULL, NULL },
2908         { "input-format", 'i', POPT_ARG_STRING, NULL, OPT_INPUT_FORMAT, NULL, NULL },
2909         { "name", '\0', POPT_ARG_STRING, NULL, OPT_NAME, NULL, NULL },
2910         { "names", 'n', POPT_ARG_STRING, NULL, OPT_NAMES, NULL, NULL },
2911         { "debug-info", '\0', POPT_ARG_NONE, NULL, OPT_DEBUG_INFO, NULL, NULL },
2912         { "no-delta", '\0', POPT_ARG_NONE, NULL, OPT_NO_DELTA, NULL, NULL },
2913         { "omit-home-plugin-path", '\0', POPT_ARG_NONE, NULL, OPT_OMIT_HOME_PLUGIN_PATH, NULL, NULL },
2914         { "omit-system-plugin-path", '\0', POPT_ARG_NONE, NULL, OPT_OMIT_SYSTEM_PLUGIN_PATH, NULL, NULL },
2915         { "output", 'w', POPT_ARG_STRING, NULL, OPT_OUTPUT, NULL, NULL },
2916         { "output-format", 'o', POPT_ARG_STRING, NULL, OPT_OUTPUT_FORMAT, NULL, NULL },
2917         { "params", 'p', POPT_ARG_STRING, NULL, OPT_PARAMS, NULL, NULL },
2918         { "path", 'P', POPT_ARG_STRING, NULL, OPT_PATH, NULL, NULL },
2919         { "plugin-path", '\0', POPT_ARG_STRING, NULL, OPT_PLUGIN_PATH, NULL, NULL },
2920         { "retry-duration", '\0', POPT_ARG_STRING, NULL, OPT_RETRY_DURATION, NULL, NULL },
2921         { "run-args", '\0', POPT_ARG_NONE, NULL, OPT_RUN_ARGS, NULL, NULL },
2922         { "run-args-0", '\0', POPT_ARG_NONE, NULL, OPT_RUN_ARGS_0, NULL, NULL },
2923         { "stream-intersection", '\0', POPT_ARG_NONE, NULL, OPT_STREAM_INTERSECTION, NULL, NULL },
2924         { "timerange", '\0', POPT_ARG_STRING, NULL, OPT_TIMERANGE, NULL, NULL },
2925         { "url", 'u', POPT_ARG_STRING, NULL, OPT_URL, NULL, NULL },
2926         { "verbose", 'v', POPT_ARG_NONE, NULL, OPT_VERBOSE, NULL, NULL },
2927         { NULL, 0, '\0', NULL, 0, NULL, NULL },
2928 };
2929
2930 static
2931 GString *get_component_auto_name(const char *prefix,
2932                 const struct bt_value *existing_names)
2933 {
2934         unsigned int i = 0;
2935         GString *auto_name = g_string_new(NULL);
2936
2937         if (!auto_name) {
2938                 print_err_oom();
2939                 goto end;
2940         }
2941
2942         if (!bt_value_map_has_entry(existing_names, prefix)) {
2943                 g_string_assign(auto_name, prefix);
2944                 goto end;
2945         }
2946
2947         do {
2948                 g_string_printf(auto_name, "%s-%d", prefix, i);
2949                 i++;
2950         } while (bt_value_map_has_entry(existing_names, auto_name->str));
2951
2952 end:
2953         return auto_name;
2954 }
2955
2956 struct implicit_component_args {
2957         bool exists;
2958         GString *comp_arg;
2959         GString *name_arg;
2960         GString *params_arg;
2961         struct bt_value *extra_params;
2962 };
2963
2964 static
2965 int assign_name_to_implicit_component(struct implicit_component_args *args,
2966                 const char *prefix, struct bt_value *existing_names,
2967                 GList **comp_names, bool append_to_comp_names)
2968 {
2969         int ret = 0;
2970         GString *name = NULL;
2971
2972         if (!args->exists) {
2973                 goto end;
2974         }
2975
2976         name = get_component_auto_name(prefix,
2977                 existing_names);
2978
2979         if (!name) {
2980                 ret = -1;
2981                 goto end;
2982         }
2983
2984         g_string_assign(args->name_arg, name->str);
2985
2986         if (bt_value_map_insert_entry(existing_names, name->str,
2987                         bt_value_null)) {
2988                 print_err_oom();
2989                 ret = -1;
2990                 goto end;
2991         }
2992
2993         if (append_to_comp_names) {
2994                 *comp_names = g_list_append(*comp_names, name);
2995                 name = NULL;
2996         }
2997
2998 end:
2999         if (name) {
3000                 g_string_free(name, TRUE);
3001         }
3002
3003         return ret;
3004 }
3005
3006 static
3007 int append_run_args_for_implicit_component(
3008                 struct implicit_component_args *impl_args,
3009                 struct bt_value *run_args)
3010 {
3011         int ret = 0;
3012         size_t i;
3013
3014         if (!impl_args->exists) {
3015                 goto end;
3016         }
3017
3018         if (bt_value_array_append_string_element(run_args, "--component")) {
3019                 print_err_oom();
3020                 goto error;
3021         }
3022
3023         if (bt_value_array_append_string_element(run_args, impl_args->comp_arg->str)) {
3024                 print_err_oom();
3025                 goto error;
3026         }
3027
3028         if (bt_value_array_append_string_element(run_args, "--name")) {
3029                 print_err_oom();
3030                 goto error;
3031         }
3032
3033         if (bt_value_array_append_string_element(run_args, impl_args->name_arg->str)) {
3034                 print_err_oom();
3035                 goto error;
3036         }
3037
3038         if (impl_args->params_arg->len > 0) {
3039                 if (bt_value_array_append_string_element(run_args, "--params")) {
3040                         print_err_oom();
3041                         goto error;
3042                 }
3043
3044                 if (bt_value_array_append_string_element(run_args,
3045                                 impl_args->params_arg->str)) {
3046                         print_err_oom();
3047                         goto error;
3048                 }
3049         }
3050
3051         for (i = 0; i < bt_value_array_get_size(impl_args->extra_params);
3052                         i++) {
3053                 const struct bt_value *elem;
3054                 const char *arg;
3055
3056                 elem = bt_value_array_borrow_element_by_index(impl_args->extra_params,
3057                                                               i);
3058                 if (!elem) {
3059                         goto error;
3060                 }
3061
3062                 BT_ASSERT(bt_value_is_string(elem));
3063                 arg = bt_value_string_get(elem);
3064                 ret = bt_value_array_append_string_element(run_args, arg);
3065                 if (ret) {
3066                         print_err_oom();
3067                         goto error;
3068                 }
3069         }
3070
3071         goto end;
3072
3073 error:
3074         ret = -1;
3075
3076 end:
3077         return ret;
3078 }
3079
3080 static
3081 void finalize_implicit_component_args(struct implicit_component_args *args)
3082 {
3083         BT_ASSERT(args);
3084
3085         if (args->comp_arg) {
3086                 g_string_free(args->comp_arg, TRUE);
3087         }
3088
3089         if (args->name_arg) {
3090                 g_string_free(args->name_arg, TRUE);
3091         }
3092
3093         if (args->params_arg) {
3094                 g_string_free(args->params_arg, TRUE);
3095         }
3096
3097         bt_object_put_ref(args->extra_params);
3098 }
3099
3100 static
3101 void destroy_implicit_component_args(void *args)
3102 {
3103         if (!args) {
3104                 return;
3105         }
3106
3107         finalize_implicit_component_args(args);
3108         g_free(args);
3109 }
3110
3111 static
3112 int init_implicit_component_args(struct implicit_component_args *args,
3113                 const char *comp_arg, bool exists)
3114 {
3115         int ret = 0;
3116
3117         args->exists = exists;
3118         args->comp_arg = g_string_new(comp_arg);
3119         args->name_arg = g_string_new(NULL);
3120         args->params_arg = g_string_new(NULL);
3121         args->extra_params = bt_value_array_create();
3122
3123         if (!args->comp_arg || !args->name_arg ||
3124                         !args->params_arg || !args->extra_params) {
3125                 ret = -1;
3126                 finalize_implicit_component_args(args);
3127                 print_err_oom();
3128                 goto end;
3129         }
3130
3131 end:
3132         return ret;
3133 }
3134
3135 static
3136 void append_implicit_component_param(struct implicit_component_args *args,
3137         const char *key, const char *value)
3138 {
3139         BT_ASSERT(args);
3140         BT_ASSERT(key);
3141         BT_ASSERT(value);
3142         append_param_arg(args->params_arg, key, value);
3143 }
3144
3145 static
3146 int append_implicit_component_extra_param(struct implicit_component_args *args,
3147                 const char *key, const char *value)
3148 {
3149         int ret = 0;
3150
3151         BT_ASSERT(args);
3152         BT_ASSERT(key);
3153         BT_ASSERT(value);
3154
3155         if (bt_value_array_append_string_element(args->extra_params, "--key")) {
3156                 print_err_oom();
3157                 ret = -1;
3158                 goto end;
3159         }
3160
3161         if (bt_value_array_append_string_element(args->extra_params, key)) {
3162                 print_err_oom();
3163                 ret = -1;
3164                 goto end;
3165         }
3166
3167         if (bt_value_array_append_string_element(args->extra_params, "--value")) {
3168                 print_err_oom();
3169                 ret = -1;
3170                 goto end;
3171         }
3172
3173         if (bt_value_array_append_string_element(args->extra_params, value)) {
3174                 print_err_oom();
3175                 ret = -1;
3176                 goto end;
3177         }
3178
3179 end:
3180         return ret;
3181 }
3182
3183 static
3184 int convert_append_name_param(enum bt_config_component_dest dest,
3185                 GString *cur_name, GString *cur_name_prefix,
3186                 struct bt_value *run_args,
3187                 struct bt_value *all_names,
3188                 GList **source_names, GList **filter_names,
3189                 GList **sink_names)
3190 {
3191         int ret = 0;
3192
3193         if (cur_name_prefix->len > 0) {
3194                 /* We're after a --component option */
3195                 GString *name = NULL;
3196                 bool append_name_opt = false;
3197
3198                 if (cur_name->len == 0) {
3199                         /*
3200                          * No explicit name was provided for the user
3201                          * component.
3202                          */
3203                         name = get_component_auto_name(cur_name_prefix->str,
3204                                 all_names);
3205                         append_name_opt = true;
3206                 } else {
3207                         /*
3208                          * An explicit name was provided for the user
3209                          * component.
3210                          */
3211                         if (bt_value_map_has_entry(all_names,
3212                                                    cur_name->str)) {
3213                                 printf_err("Duplicate component instance name:\n    %s\n",
3214                                         cur_name->str);
3215                                 goto error;
3216                         }
3217
3218                         name = g_string_new(cur_name->str);
3219                 }
3220
3221                 if (!name) {
3222                         print_err_oom();
3223                         goto error;
3224                 }
3225
3226                 /*
3227                  * Remember this name globally, for the uniqueness of
3228                  * all component names.
3229                  */
3230                 if (bt_value_map_insert_entry(all_names, name->str, bt_value_null)) {
3231                         print_err_oom();
3232                         goto error;
3233                 }
3234
3235                 /*
3236                  * Append the --name option if necessary.
3237                  */
3238                 if (append_name_opt) {
3239                         if (bt_value_array_append_string_element(run_args, "--name")) {
3240                                 print_err_oom();
3241                                 goto error;
3242                         }
3243
3244                         if (bt_value_array_append_string_element(run_args, name->str)) {
3245                                 print_err_oom();
3246                                 goto error;
3247                         }
3248                 }
3249
3250                 /*
3251                  * Remember this name specifically for the type of the
3252                  * component. This is to create connection arguments.
3253                  */
3254                 switch (dest) {
3255                 case BT_CONFIG_COMPONENT_DEST_SOURCE:
3256                         *source_names = g_list_append(*source_names, name);
3257                         break;
3258                 case BT_CONFIG_COMPONENT_DEST_FILTER:
3259                         *filter_names = g_list_append(*filter_names, name);
3260                         break;
3261                 case BT_CONFIG_COMPONENT_DEST_SINK:
3262                         *sink_names = g_list_append(*sink_names, name);
3263                         break;
3264                 default:
3265                         abort();
3266                 }
3267
3268                 g_string_assign(cur_name_prefix, "");
3269         }
3270
3271         goto end;
3272
3273 error:
3274         ret = -1;
3275
3276 end:
3277         return ret;
3278 }
3279
3280 /*
3281  * Escapes `.`, `:`, and `\` of `input` with `\`.
3282  */
3283 static
3284 GString *escape_dot_colon(const char *input)
3285 {
3286         GString *output = g_string_new(NULL);
3287         const char *ch;
3288
3289         if (!output) {
3290                 print_err_oom();
3291                 goto end;
3292         }
3293
3294         for (ch = input; *ch != '\0'; ch++) {
3295                 if (*ch == '\\' || *ch == '.' || *ch == ':') {
3296                         g_string_append_c(output, '\\');
3297                 }
3298
3299                 g_string_append_c(output, *ch);
3300         }
3301
3302 end:
3303         return output;
3304 }
3305
3306 /*
3307  * Appends a --connect option to a list of arguments. `upstream_name`
3308  * and `downstream_name` are escaped with escape_dot_colon() in this
3309  * function.
3310  */
3311 static
3312 int append_connect_arg(struct bt_value *run_args,
3313                 const char *upstream_name, const char *downstream_name)
3314 {
3315         int ret = 0;
3316         GString *e_upstream_name = escape_dot_colon(upstream_name);
3317         GString *e_downstream_name = escape_dot_colon(downstream_name);
3318         GString *arg = g_string_new(NULL);
3319
3320         if (!e_upstream_name || !e_downstream_name || !arg) {
3321                 print_err_oom();
3322                 ret = -1;
3323                 goto end;
3324         }
3325
3326         ret = bt_value_array_append_string_element(run_args, "--connect");
3327         if (ret) {
3328                 print_err_oom();
3329                 ret = -1;
3330                 goto end;
3331         }
3332
3333         g_string_append(arg, e_upstream_name->str);
3334         g_string_append_c(arg, ':');
3335         g_string_append(arg, e_downstream_name->str);
3336         ret = bt_value_array_append_string_element(run_args, arg->str);
3337         if (ret) {
3338                 print_err_oom();
3339                 ret = -1;
3340                 goto end;
3341         }
3342
3343 end:
3344         if (arg) {
3345                 g_string_free(arg, TRUE);
3346         }
3347
3348         if (e_upstream_name) {
3349                 g_string_free(e_upstream_name, TRUE);
3350         }
3351
3352         if (e_downstream_name) {
3353                 g_string_free(e_downstream_name, TRUE);
3354         }
3355
3356         return ret;
3357 }
3358
3359 /*
3360  * Appends the run command's --connect options for the convert command.
3361  */
3362 static
3363 int convert_auto_connect(struct bt_value *run_args,
3364                 GList *source_names, GList *filter_names,
3365                 GList *sink_names)
3366 {
3367         int ret = 0;
3368         GList *source_at = source_names;
3369         GList *filter_at = filter_names;
3370         GList *filter_prev;
3371         GList *sink_at = sink_names;
3372
3373         BT_ASSERT(source_names);
3374         BT_ASSERT(filter_names);
3375         BT_ASSERT(sink_names);
3376
3377         /* Connect all sources to the first filter */
3378         for (source_at = source_names; source_at != NULL; source_at = g_list_next(source_at)) {
3379                 GString *source_name = source_at->data;
3380                 GString *filter_name = filter_at->data;
3381
3382                 ret = append_connect_arg(run_args, source_name->str,
3383                         filter_name->str);
3384                 if (ret) {
3385                         goto error;
3386                 }
3387         }
3388
3389         filter_prev = filter_at;
3390         filter_at = g_list_next(filter_at);
3391
3392         /* Connect remaining filters */
3393         for (; filter_at != NULL; filter_prev = filter_at, filter_at = g_list_next(filter_at)) {
3394                 GString *filter_name = filter_at->data;
3395                 GString *filter_prev_name = filter_prev->data;
3396
3397                 ret = append_connect_arg(run_args, filter_prev_name->str,
3398                         filter_name->str);
3399                 if (ret) {
3400                         goto error;
3401                 }
3402         }
3403
3404         /* Connect last filter to all sinks */
3405         for (sink_at = sink_names; sink_at != NULL; sink_at = g_list_next(sink_at)) {
3406                 GString *filter_name = filter_prev->data;
3407                 GString *sink_name = sink_at->data;
3408
3409                 ret = append_connect_arg(run_args, filter_name->str,
3410                         sink_name->str);
3411                 if (ret) {
3412                         goto error;
3413                 }
3414         }
3415
3416         goto end;
3417
3418 error:
3419         ret = -1;
3420
3421 end:
3422         return ret;
3423 }
3424
3425 static
3426 int split_timerange(const char *arg, char **begin, char **end)
3427 {
3428         int ret = 0;
3429         const char *ch = arg;
3430         size_t end_pos;
3431         GString *g_begin = NULL;
3432         GString *g_end = NULL;
3433
3434         BT_ASSERT(arg);
3435
3436         if (*ch == '[') {
3437                 ch++;
3438         }
3439
3440         g_begin = bt_common_string_until(ch, "", ",", &end_pos);
3441         if (!g_begin || ch[end_pos] != ',' || g_begin->len == 0) {
3442                 goto error;
3443         }
3444
3445         ch += end_pos + 1;
3446
3447         g_end = bt_common_string_until(ch, "", "]", &end_pos);
3448         if (!g_end || g_end->len == 0) {
3449                 goto error;
3450         }
3451
3452         BT_ASSERT(begin);
3453         BT_ASSERT(end);
3454         *begin = g_begin->str;
3455         *end = g_end->str;
3456         g_string_free(g_begin, FALSE);
3457         g_string_free(g_end, FALSE);
3458         g_begin = NULL;
3459         g_end = NULL;
3460         goto end;
3461
3462 error:
3463         ret = -1;
3464
3465 end:
3466         if (g_begin) {
3467                 g_string_free(g_begin, TRUE);
3468         }
3469
3470         if (g_end) {
3471                 g_string_free(g_end, TRUE);
3472         }
3473
3474         return ret;
3475 }
3476
3477 static
3478 int g_list_prepend_gstring(GList **list, const char *string)
3479 {
3480         int ret = 0;
3481         GString *gs = g_string_new(string);
3482
3483         BT_ASSERT(list);
3484
3485         if (!gs) {
3486                 print_err_oom();
3487                 goto end;
3488         }
3489
3490         *list = g_list_prepend(*list, gs);
3491
3492 end:
3493         return ret;
3494 }
3495
3496 static
3497 struct implicit_component_args *create_implicit_component_args(void)
3498 {
3499         struct implicit_component_args *impl_args =
3500                 g_new0(struct implicit_component_args, 1);
3501
3502         if (!impl_args) {
3503                 goto end;
3504         }
3505
3506         if (init_implicit_component_args(impl_args, NULL, true)) {
3507                 destroy_implicit_component_args(impl_args);
3508                 impl_args = NULL;
3509                 goto end;
3510         }
3511
3512 end:
3513         return impl_args;
3514 }
3515
3516 static
3517 int fill_implicit_ctf_inputs_args(GPtrArray *implicit_ctf_inputs_args,
3518                 struct implicit_component_args *base_implicit_ctf_input_args,
3519                 GList *leftovers)
3520 {
3521         int ret = 0;
3522         GList *leftover;
3523         enum bt_value_status status;
3524
3525         for (leftover = leftovers; leftover != NULL;
3526                         leftover = g_list_next(leftover)) {
3527                 GString *gs_leftover = leftover->data;
3528                 struct implicit_component_args *impl_args =
3529                         create_implicit_component_args();
3530
3531                 if (!impl_args) {
3532                         print_err_oom();
3533                         goto error;
3534                 }
3535
3536                 impl_args->exists = true;
3537                 g_string_assign(impl_args->comp_arg,
3538                         base_implicit_ctf_input_args->comp_arg->str);
3539                 g_string_assign(impl_args->params_arg,
3540                         base_implicit_ctf_input_args->params_arg->str);
3541
3542                 /*
3543                  * We need our own copy of the extra parameters because
3544                  * this is where the unique path goes.
3545                  */
3546                 BT_OBJECT_PUT_REF_AND_RESET(impl_args->extra_params);
3547                 status = bt_value_copy(&impl_args->extra_params,
3548                                 base_implicit_ctf_input_args->extra_params);
3549                 if (status != BT_VALUE_STATUS_OK) {
3550                         print_err_oom();
3551                         destroy_implicit_component_args(impl_args);
3552                         goto error;
3553                 }
3554
3555                 /* Append unique path parameter */
3556                 ret = append_implicit_component_extra_param(impl_args,
3557                         "path", gs_leftover->str);
3558                 if (ret) {
3559                         destroy_implicit_component_args(impl_args);
3560                         goto error;
3561                 }
3562
3563                 g_ptr_array_add(implicit_ctf_inputs_args, impl_args);
3564         }
3565
3566         goto end;
3567
3568 error:
3569         ret = -1;
3570
3571 end:
3572         return ret;
3573 }
3574
3575 /*
3576  * Creates a Babeltrace config object from the arguments of a convert
3577  * command.
3578  *
3579  * *retcode is set to the appropriate exit code to use.
3580  */
3581 static
3582 struct bt_config *bt_config_convert_from_args(int argc, const char *argv[],
3583                 int *retcode, bool force_omit_system_plugin_path,
3584                 bool force_omit_home_plugin_path,
3585                 const struct bt_value *initial_plugin_paths, char *log_level)
3586 {
3587         poptContext pc = NULL;
3588         char *arg = NULL;
3589         enum bt_config_component_dest cur_comp_dest =
3590                         BT_CONFIG_COMPONENT_DEST_UNKNOWN;
3591         int opt, ret = 0;
3592         struct bt_config *cfg = NULL;
3593         bool got_input_format_opt = false;
3594         bool got_output_format_opt = false;
3595         bool trimmer_has_begin = false;
3596         bool trimmer_has_end = false;
3597         bool stream_intersection_mode = false;
3598         GString *cur_name = NULL;
3599         GString *cur_name_prefix = NULL;
3600         const char *leftover = NULL;
3601         bool print_run_args = false;
3602         bool print_run_args_0 = false;
3603         bool print_ctf_metadata = false;
3604         struct bt_value *run_args = NULL;
3605         struct bt_value *all_names = NULL;
3606         GList *source_names = NULL;
3607         GList *filter_names = NULL;
3608         GList *sink_names = NULL;
3609         GList *leftovers = NULL;
3610         GPtrArray *implicit_ctf_inputs_args = NULL;
3611         struct implicit_component_args base_implicit_ctf_input_args = { 0 };
3612         struct implicit_component_args implicit_ctf_output_args = { 0 };
3613         struct implicit_component_args implicit_lttng_live_args = { 0 };
3614         struct implicit_component_args implicit_dummy_args = { 0 };
3615         struct implicit_component_args implicit_text_args = { 0 };
3616         struct implicit_component_args implicit_debug_info_args = { 0 };
3617         struct implicit_component_args implicit_muxer_args = { 0 };
3618         struct implicit_component_args implicit_trimmer_args = { 0 };
3619         struct bt_value *plugin_paths;
3620         char error_buf[256] = { 0 };
3621         size_t i;
3622         struct bt_common_lttng_live_url_parts lttng_live_url_parts = { 0 };
3623         char *output = NULL;
3624
3625         (void) bt_value_copy(&plugin_paths, initial_plugin_paths);
3626
3627         *retcode = 0;
3628
3629         if (argc <= 1) {
3630                 print_convert_usage(stdout);
3631                 *retcode = -1;
3632                 goto end;
3633         }
3634
3635         if (init_implicit_component_args(&base_implicit_ctf_input_args,
3636                         "source.ctf.fs", false)) {
3637                 goto error;
3638         }
3639
3640         if (init_implicit_component_args(&implicit_ctf_output_args,
3641                         "sink.ctf.fs", false)) {
3642                 goto error;
3643         }
3644
3645         if (init_implicit_component_args(&implicit_lttng_live_args,
3646                         "source.ctf.lttng-live", false)) {
3647                 goto error;
3648         }
3649
3650         if (init_implicit_component_args(&implicit_text_args,
3651                         "sink.text.pretty", false)) {
3652                 goto error;
3653         }
3654
3655         if (init_implicit_component_args(&implicit_dummy_args,
3656                         "sink.utils.dummy", false)) {
3657                 goto error;
3658         }
3659
3660         if (init_implicit_component_args(&implicit_debug_info_args,
3661                         "filter.lttng-utils.debug-info", false)) {
3662                 goto error;
3663         }
3664
3665         if (init_implicit_component_args(&implicit_muxer_args,
3666                         "filter.utils.muxer", true)) {
3667                 goto error;
3668         }
3669
3670         if (init_implicit_component_args(&implicit_trimmer_args,
3671                         "filter.utils.trimmer", false)) {
3672                 goto error;
3673         }
3674
3675         implicit_ctf_inputs_args = g_ptr_array_new_with_free_func(
3676                 (GDestroyNotify) destroy_implicit_component_args);
3677         if (!implicit_ctf_inputs_args) {
3678                 print_err_oom();
3679                 goto error;
3680         }
3681
3682         all_names = bt_value_map_create();
3683         if (!all_names) {
3684                 print_err_oom();
3685                 goto error;
3686         }
3687
3688         run_args = bt_value_array_create();
3689         if (!run_args) {
3690                 print_err_oom();
3691                 goto error;
3692         }
3693
3694         cur_name = g_string_new(NULL);
3695         if (!cur_name) {
3696                 print_err_oom();
3697                 goto error;
3698         }
3699
3700         cur_name_prefix = g_string_new(NULL);
3701         if (!cur_name_prefix) {
3702                 print_err_oom();
3703                 goto error;
3704         }
3705
3706         ret = append_env_var_plugin_paths(plugin_paths);
3707         if (ret) {
3708                 goto error;
3709         }
3710
3711         /*
3712          * First pass: collect all arguments which need to be passed
3713          * as is to the run command. This pass can also add --name
3714          * arguments if needed to automatically name unnamed component
3715          * instances. Also it does the following transformations:
3716          *
3717          *     --path=PATH -> --key path --value PATH
3718          *     --url=URL   -> --key url --value URL
3719          *
3720          * Also it appends the plugin paths of --plugin-path to
3721          * `plugin_paths`.
3722          */
3723         pc = poptGetContext(NULL, argc, (const char **) argv,
3724                 convert_long_options, 0);
3725         if (!pc) {
3726                 printf_err("Cannot get popt context\n");
3727                 goto error;
3728         }
3729
3730         poptReadDefaultConfig(pc, 0);
3731
3732         while ((opt = poptGetNextOpt(pc)) > 0) {
3733                 char *name = NULL;
3734                 char *plugin_name = NULL;
3735                 char *comp_cls_name = NULL;
3736
3737                 arg = poptGetOptArg(pc);
3738
3739                 switch (opt) {
3740                 case OPT_COMPONENT:
3741                 {
3742                         enum bt_component_class_type type;
3743                         const char *type_prefix;
3744
3745                         /* Append current component's name if needed */
3746                         ret = convert_append_name_param(cur_comp_dest, cur_name,
3747                                 cur_name_prefix, run_args, all_names,
3748                                 &source_names, &filter_names, &sink_names);
3749                         if (ret) {
3750                                 goto error;
3751                         }
3752
3753                         /* Parse the argument */
3754                         plugin_comp_cls_names(arg, &name, &plugin_name,
3755                                 &comp_cls_name, &type);
3756                         if (!plugin_name || !comp_cls_name) {
3757                                 printf_err("Invalid format for --component option's argument:\n    %s\n",
3758                                         arg);
3759                                 goto error;
3760                         }
3761
3762                         if (name) {
3763                                 g_string_assign(cur_name, name);
3764                         } else {
3765                                 g_string_assign(cur_name, "");
3766                         }
3767
3768                         switch (type) {
3769                         case BT_COMPONENT_CLASS_TYPE_SOURCE:
3770                                 cur_comp_dest = BT_CONFIG_COMPONENT_DEST_SOURCE;
3771                                 type_prefix = "source";
3772                                 break;
3773                         case BT_COMPONENT_CLASS_TYPE_FILTER:
3774                                 cur_comp_dest = BT_CONFIG_COMPONENT_DEST_FILTER;
3775                                 type_prefix = "filter";
3776                                 break;
3777                         case BT_COMPONENT_CLASS_TYPE_SINK:
3778                                 cur_comp_dest = BT_CONFIG_COMPONENT_DEST_SINK;
3779                                 type_prefix = "sink";
3780                                 break;
3781                         default:
3782                                 abort();
3783                         }
3784
3785                         if (bt_value_array_append_string_element(run_args,
3786                                         "--component")) {
3787                                 print_err_oom();
3788                                 goto error;
3789                         }
3790
3791                         if (bt_value_array_append_string_element(run_args, arg)) {
3792                                 print_err_oom();
3793                                 goto error;
3794                         }
3795
3796                         g_string_assign(cur_name_prefix, "");
3797                         g_string_append_printf(cur_name_prefix, "%s.%s.%s",
3798                                 type_prefix, plugin_name, comp_cls_name);
3799                         free(name);
3800                         free(plugin_name);
3801                         free(comp_cls_name);
3802                         name = NULL;
3803                         plugin_name = NULL;
3804                         comp_cls_name = NULL;
3805                         break;
3806                 }
3807                 case OPT_PARAMS:
3808                         if (cur_name_prefix->len == 0) {
3809                                 printf_err("No current component of which to set parameters:\n    %s\n",
3810                                         arg);
3811                                 goto error;
3812                         }
3813
3814                         if (bt_value_array_append_string_element(run_args,
3815                                         "--params")) {
3816                                 print_err_oom();
3817                                 goto error;
3818                         }
3819
3820                         if (bt_value_array_append_string_element(run_args, arg)) {
3821                                 print_err_oom();
3822                                 goto error;
3823                         }
3824                         break;
3825                 case OPT_PATH:
3826                         if (cur_name_prefix->len == 0) {
3827                                 printf_err("No current component of which to set `path` parameter:\n    %s\n",
3828                                         arg);
3829                                 goto error;
3830                         }
3831
3832                         if (bt_value_array_append_string_element(run_args, "--key")) {
3833                                 print_err_oom();
3834                                 goto error;
3835                         }
3836
3837                         if (bt_value_array_append_string_element(run_args, "path")) {
3838                                 print_err_oom();
3839                                 goto error;
3840                         }
3841
3842                         if (bt_value_array_append_string_element(run_args, "--value")) {
3843                                 print_err_oom();
3844                                 goto error;
3845                         }
3846
3847                         if (bt_value_array_append_string_element(run_args, arg)) {
3848                                 print_err_oom();
3849                                 goto error;
3850                         }
3851                         break;
3852                 case OPT_URL:
3853                         if (cur_name_prefix->len == 0) {
3854                                 printf_err("No current component of which to set `url` parameter:\n    %s\n",
3855                                         arg);
3856                                 goto error;
3857                         }
3858
3859                         if (bt_value_array_append_string_element(run_args, "--key")) {
3860                                 print_err_oom();
3861                                 goto error;
3862                         }
3863
3864                         if (bt_value_array_append_string_element(run_args, "url")) {
3865                                 print_err_oom();
3866                                 goto error;
3867                         }
3868
3869                         if (bt_value_array_append_string_element(run_args, "--value")) {
3870                                 print_err_oom();
3871                                 goto error;
3872                         }
3873
3874                         if (bt_value_array_append_string_element(run_args, arg)) {
3875                                 print_err_oom();
3876                                 goto error;
3877                         }
3878                         break;
3879                 case OPT_NAME:
3880                         if (cur_name_prefix->len == 0) {
3881                                 printf_err("No current component to name:\n    %s\n",
3882                                         arg);
3883                                 goto error;
3884                         }
3885
3886                         if (bt_value_array_append_string_element(run_args, "--name")) {
3887                                 print_err_oom();
3888                                 goto error;
3889                         }
3890
3891                         if (bt_value_array_append_string_element(run_args, arg)) {
3892                                 print_err_oom();
3893                                 goto error;
3894                         }
3895
3896                         g_string_assign(cur_name, arg);
3897                         break;
3898                 case OPT_OMIT_HOME_PLUGIN_PATH:
3899                         force_omit_home_plugin_path = true;
3900
3901                         if (bt_value_array_append_string_element(run_args,
3902                                         "--omit-home-plugin-path")) {
3903                                 print_err_oom();
3904                                 goto error;
3905                         }
3906                         break;
3907                 case OPT_RETRY_DURATION:
3908                         if (bt_value_array_append_string_element(run_args,
3909                                         "--retry-duration")) {
3910                                 print_err_oom();
3911                                 goto error;
3912                         }
3913
3914                         if (bt_value_array_append_string_element(run_args, arg)) {
3915                                 print_err_oom();
3916                                 goto error;
3917                         }
3918                         break;
3919                 case OPT_OMIT_SYSTEM_PLUGIN_PATH:
3920                         force_omit_system_plugin_path = true;
3921
3922                         if (bt_value_array_append_string_element(run_args,
3923                                         "--omit-system-plugin-path")) {
3924                                 print_err_oom();
3925                                 goto error;
3926                         }
3927                         break;
3928                 case OPT_PLUGIN_PATH:
3929                         if (bt_config_append_plugin_paths_check_setuid_setgid(
3930                                         plugin_paths, arg)) {
3931                                 goto error;
3932                         }
3933
3934                         if (bt_value_array_append_string_element(run_args,
3935                                         "--plugin-path")) {
3936                                 print_err_oom();
3937                                 goto error;
3938                         }
3939
3940                         if (bt_value_array_append_string_element(run_args, arg)) {
3941                                 print_err_oom();
3942                                 goto error;
3943                         }
3944                         break;
3945                 case OPT_HELP:
3946                         print_convert_usage(stdout);
3947                         *retcode = -1;
3948                         BT_OBJECT_PUT_REF_AND_RESET(cfg);
3949                         goto end;
3950                 case OPT_BEGIN:
3951                 case OPT_CLOCK_CYCLES:
3952                 case OPT_CLOCK_DATE:
3953                 case OPT_CLOCK_FORCE_CORRELATE:
3954                 case OPT_CLOCK_GMT:
3955                 case OPT_CLOCK_OFFSET:
3956                 case OPT_CLOCK_OFFSET_NS:
3957                 case OPT_CLOCK_SECONDS:
3958                 case OPT_COLOR:
3959                 case OPT_DEBUG:
3960                 case OPT_DEBUG_INFO:
3961                 case OPT_DEBUG_INFO_DIR:
3962                 case OPT_DEBUG_INFO_FULL_PATH:
3963                 case OPT_DEBUG_INFO_TARGET_PREFIX:
3964                 case OPT_END:
3965                 case OPT_FIELDS:
3966                 case OPT_INPUT_FORMAT:
3967                 case OPT_NAMES:
3968                 case OPT_NO_DELTA:
3969                 case OPT_OUTPUT_FORMAT:
3970                 case OPT_OUTPUT:
3971                 case OPT_RUN_ARGS:
3972                 case OPT_RUN_ARGS_0:
3973                 case OPT_STREAM_INTERSECTION:
3974                 case OPT_TIMERANGE:
3975                 case OPT_VERBOSE:
3976                         /* Ignore in this pass */
3977                         break;
3978                 default:
3979                         printf_err("Unknown command-line option specified (option code %d)\n",
3980                                 opt);
3981                         goto error;
3982                 }
3983
3984                 free(arg);
3985                 arg = NULL;
3986         }
3987
3988         /* Append current component's name if needed */
3989         ret = convert_append_name_param(cur_comp_dest, cur_name,
3990                 cur_name_prefix, run_args, all_names, &source_names,
3991                 &filter_names, &sink_names);
3992         if (ret) {
3993                 goto error;
3994         }
3995
3996         /* Check for option parsing error */
3997         if (opt < -1) {
3998                 printf_err("While parsing command-line options, at option %s: %s\n",
3999                         poptBadOption(pc, 0), poptStrerror(opt));
4000                 goto error;
4001         }
4002
4003         poptFreeContext(pc);
4004         free(arg);
4005         arg = NULL;
4006
4007         /*
4008          * Second pass: transform the convert-specific options and
4009          * arguments into implicit component instances for the run
4010          * command.
4011          */
4012         pc = poptGetContext(NULL, argc, (const char **) argv,
4013                 convert_long_options, 0);
4014         if (!pc) {
4015                 printf_err("Cannot get popt context\n");
4016                 goto error;
4017         }
4018
4019         poptReadDefaultConfig(pc, 0);
4020
4021         while ((opt = poptGetNextOpt(pc)) > 0) {
4022                 arg = poptGetOptArg(pc);
4023
4024                 switch (opt) {
4025                 case OPT_BEGIN:
4026                         if (trimmer_has_begin) {
4027                                 printf("At --begin option: --begin or --timerange option already specified\n    %s\n",
4028                                         arg);
4029                                 goto error;
4030                         }
4031
4032                         trimmer_has_begin = true;
4033                         ret = append_implicit_component_extra_param(
4034                                 &implicit_trimmer_args, "begin", arg);
4035                         implicit_trimmer_args.exists = true;
4036                         if (ret) {
4037                                 goto error;
4038                         }
4039                         break;
4040                 case OPT_END:
4041                         if (trimmer_has_end) {
4042                                 printf("At --end option: --end or --timerange option already specified\n    %s\n",
4043                                         arg);
4044                                 goto error;
4045                         }
4046
4047                         trimmer_has_end = true;
4048                         ret = append_implicit_component_extra_param(
4049                                 &implicit_trimmer_args, "end", arg);
4050                         implicit_trimmer_args.exists = true;
4051                         if (ret) {
4052                                 goto error;
4053                         }
4054                         break;
4055                 case OPT_TIMERANGE:
4056                 {
4057                         char *begin;
4058                         char *end;
4059
4060                         if (trimmer_has_begin || trimmer_has_end) {
4061                                 printf("At --timerange option: --begin, --end, or --timerange option already specified\n    %s\n",
4062                                         arg);
4063                                 goto error;
4064                         }
4065
4066                         ret = split_timerange(arg, &begin, &end);
4067                         if (ret) {
4068                                 printf_err("Invalid --timerange option's argument: expecting BEGIN,END or [BEGIN,END]:\n    %s\n",
4069                                         arg);
4070                                 goto error;
4071                         }
4072
4073                         ret = append_implicit_component_extra_param(
4074                                 &implicit_trimmer_args, "begin", begin);
4075                         ret |= append_implicit_component_extra_param(
4076                                 &implicit_trimmer_args, "end", end);
4077                         implicit_trimmer_args.exists = true;
4078                         free(begin);
4079                         free(end);
4080                         if (ret) {
4081                                 goto error;
4082                         }
4083                         break;
4084                 }
4085                 case OPT_CLOCK_CYCLES:
4086                         append_implicit_component_param(
4087                                 &implicit_text_args, "clock-cycles", "yes");
4088                         implicit_text_args.exists = true;
4089                         break;
4090                 case OPT_CLOCK_DATE:
4091                         append_implicit_component_param(
4092                                 &implicit_text_args, "clock-date", "yes");
4093                         implicit_text_args.exists = true;
4094                         break;
4095                 case OPT_CLOCK_FORCE_CORRELATE:
4096                         append_implicit_component_param(
4097                                 &implicit_muxer_args,
4098                                 "assume-absolute-clock-classes", "yes");
4099                         break;
4100                 case OPT_CLOCK_GMT:
4101                         append_implicit_component_param(
4102                                 &implicit_text_args, "clock-gmt", "yes");
4103                         append_implicit_component_param(
4104                                 &implicit_trimmer_args, "clock-gmt", "yes");
4105                         implicit_text_args.exists = true;
4106                         break;
4107                 case OPT_CLOCK_OFFSET:
4108                         base_implicit_ctf_input_args.exists = true;
4109                         append_implicit_component_param(
4110                                         &base_implicit_ctf_input_args,
4111                                         "clock-class-offset-s", arg);
4112                         break;
4113                 case OPT_CLOCK_OFFSET_NS:
4114                         base_implicit_ctf_input_args.exists = true;
4115                         append_implicit_component_param(
4116                                         &base_implicit_ctf_input_args,
4117                                         "clock-class-offset-ns", arg);
4118                         break;
4119                 case OPT_CLOCK_SECONDS:
4120                         append_implicit_component_param(
4121                                 &implicit_text_args, "clock-seconds", "yes");
4122                         implicit_text_args.exists = true;
4123                         break;
4124                 case OPT_COLOR:
4125                         implicit_text_args.exists = true;
4126                         ret = append_implicit_component_extra_param(
4127                                 &implicit_text_args, "color", arg);
4128                         if (ret) {
4129                                 goto error;
4130                         }
4131                         break;
4132                 case OPT_DEBUG_INFO:
4133                         implicit_debug_info_args.exists = true;
4134                         break;
4135                 case OPT_DEBUG_INFO_DIR:
4136                         implicit_debug_info_args.exists = true;
4137                         ret = append_implicit_component_extra_param(
4138                                 &implicit_debug_info_args, "debug-info-dir", arg);
4139                         if (ret) {
4140                                 goto error;
4141                         }
4142                         break;
4143                 case OPT_DEBUG_INFO_FULL_PATH:
4144                         implicit_debug_info_args.exists = true;
4145                         append_implicit_component_param(
4146                                 &implicit_debug_info_args, "full-path", "yes");
4147                         break;
4148                 case OPT_DEBUG_INFO_TARGET_PREFIX:
4149                         implicit_debug_info_args.exists = true;
4150                         ret = append_implicit_component_extra_param(
4151                                 &implicit_debug_info_args,
4152                                 "target-prefix", arg);
4153                         if (ret) {
4154                                 goto error;
4155                         }
4156                         break;
4157                 case OPT_FIELDS:
4158                 {
4159                         struct bt_value *fields = fields_from_arg(arg);
4160
4161                         if (!fields) {
4162                                 goto error;
4163                         }
4164
4165                         implicit_text_args.exists = true;
4166                         ret = insert_flat_params_from_array(
4167                                 implicit_text_args.params_arg,
4168                                 fields, "field");
4169                         bt_object_put_ref(fields);
4170                         if (ret) {
4171                                 goto error;
4172                         }
4173                         break;
4174                 }
4175                 case OPT_NAMES:
4176                 {
4177                         struct bt_value *names = names_from_arg(arg);
4178
4179                         if (!names) {
4180                                 goto error;
4181                         }
4182
4183                         implicit_text_args.exists = true;
4184                         ret = insert_flat_params_from_array(
4185                                 implicit_text_args.params_arg,
4186                                 names, "name");
4187                         bt_object_put_ref(names);
4188                         if (ret) {
4189                                 goto error;
4190                         }
4191                         break;
4192                 }
4193                 case OPT_NO_DELTA:
4194                         append_implicit_component_param(
4195                                 &implicit_text_args, "no-delta", "yes");
4196                         implicit_text_args.exists = true;
4197                         break;
4198                 case OPT_INPUT_FORMAT:
4199                         if (got_input_format_opt) {
4200                                 printf_err("Duplicate --input-format option\n");
4201                                 goto error;
4202                         }
4203
4204                         got_input_format_opt = true;
4205
4206                         if (strcmp(arg, "ctf") == 0) {
4207                                 base_implicit_ctf_input_args.exists = true;
4208                         } else if (strcmp(arg, "lttng-live") == 0) {
4209                                 implicit_lttng_live_args.exists = true;
4210                         } else {
4211                                 printf_err("Unknown legacy input format:\n    %s\n",
4212                                         arg);
4213                                 goto error;
4214                         }
4215                         break;
4216                 case OPT_OUTPUT_FORMAT:
4217                         if (got_output_format_opt) {
4218                                 printf_err("Duplicate --output-format option\n");
4219                                 goto error;
4220                         }
4221
4222                         got_output_format_opt = true;
4223
4224                         if (strcmp(arg, "text") == 0) {
4225                                 implicit_text_args.exists = true;
4226                         } else if (strcmp(arg, "ctf") == 0) {
4227                                 implicit_ctf_output_args.exists = true;
4228                         } else if (strcmp(arg, "dummy") == 0) {
4229                                 implicit_dummy_args.exists = true;
4230                         } else if (strcmp(arg, "ctf-metadata") == 0) {
4231                                 print_ctf_metadata = true;
4232                         } else {
4233                                 printf_err("Unknown legacy output format:\n    %s\n",
4234                                         arg);
4235                                 goto error;
4236                         }
4237                         break;
4238                 case OPT_OUTPUT:
4239                         if (output) {
4240                                 printf_err("Duplicate --output option\n");
4241                                 goto error;
4242                         }
4243
4244                         output = strdup(arg);
4245                         if (!output) {
4246                                 print_err_oom();
4247                                 goto error;
4248                         }
4249                         break;
4250                 case OPT_RUN_ARGS:
4251                         if (print_run_args_0) {
4252                                 printf_err("Cannot specify --run-args and --run-args-0\n");
4253                                 goto error;
4254                         }
4255
4256                         print_run_args = true;
4257                         break;
4258                 case OPT_RUN_ARGS_0:
4259                         if (print_run_args) {
4260                                 printf_err("Cannot specify --run-args and --run-args-0\n");
4261                                 goto error;
4262                         }
4263
4264                         print_run_args_0 = true;
4265                         break;
4266                 case OPT_STREAM_INTERSECTION:
4267                         /*
4268                          * Applies to all traces implementing the trace-info
4269                          * query.
4270                          */
4271                         stream_intersection_mode = true;
4272                         break;
4273                 case OPT_VERBOSE:
4274                         if (*log_level != 'V' && *log_level != 'D') {
4275                                 *log_level = 'I';
4276                         }
4277                         break;
4278                 case OPT_DEBUG:
4279                         *log_level = 'V';
4280                         break;
4281                 }
4282
4283                 free(arg);
4284                 arg = NULL;
4285         }
4286
4287         /* Check for option parsing error */
4288         if (opt < -1) {
4289                 printf_err("While parsing command-line options, at option %s: %s\n",
4290                         poptBadOption(pc, 0), poptStrerror(opt));
4291                 goto error;
4292         }
4293
4294         /*
4295          * Legacy behaviour: --verbose used to make the `text` output
4296          * format print more information. --verbose is now equivalent to
4297          * the INFO log level, which is why we compare to 'I' here.
4298          */
4299         if (*log_level == 'I') {
4300                 append_implicit_component_param(&implicit_text_args,
4301                         "verbose", "yes");
4302         }
4303
4304         /*
4305          * Append home and system plugin paths now that we possibly got
4306          * --plugin-path.
4307          */
4308         if (append_home_and_system_plugin_paths(plugin_paths,
4309                         force_omit_system_plugin_path,
4310                         force_omit_home_plugin_path)) {
4311                 goto error;
4312         }
4313
4314         /* Consume and keep leftover arguments */
4315         while ((leftover = poptGetArg(pc))) {
4316                 GString *gs_leftover = g_string_new(leftover);
4317
4318                 if (!gs_leftover) {
4319                         print_err_oom();
4320                         goto error;
4321                 }
4322
4323                 leftovers = g_list_append(leftovers, gs_leftover);
4324                 if (!leftovers) {
4325                         g_string_free(gs_leftover, TRUE);
4326                         print_err_oom();
4327                         goto error;
4328                 }
4329         }
4330
4331         /* Print CTF metadata or print LTTng live sessions */
4332         if (print_ctf_metadata) {
4333                 GString *gs_leftover;
4334
4335                 if (g_list_length(leftovers) == 0) {
4336                         printf_err("--output-format=ctf-metadata specified without a path\n");
4337                         goto error;
4338                 }
4339
4340                 if (g_list_length(leftovers) > 1) {
4341                         printf_err("Too many paths specified for --output-format=ctf-metadata\n");
4342                         goto error;
4343                 }
4344
4345                 cfg = bt_config_print_ctf_metadata_create(plugin_paths);
4346                 if (!cfg) {
4347                         goto error;
4348                 }
4349
4350                 gs_leftover = leftovers->data;
4351                 g_string_assign(cfg->cmd_data.print_ctf_metadata.path,
4352                         gs_leftover->str);
4353
4354                 if (output) {
4355                         g_string_assign(
4356                                 cfg->cmd_data.print_ctf_metadata.output_path,
4357                                 output);
4358                 }
4359
4360                 goto end;
4361         }
4362
4363         /*
4364          * If -o ctf was specified, make sure an output path (--output)
4365          * was also specified. --output does not imply -o ctf because
4366          * it's also used for the default, implicit -o text if -o ctf
4367          * is not specified.
4368          */
4369         if (implicit_ctf_output_args.exists) {
4370                 if (!output) {
4371                         printf_err("--output-format=ctf specified without --output (trace output path)\n");
4372                         goto error;
4373                 }
4374
4375                 /*
4376                  * At this point we know that -o ctf AND --output were
4377                  * specified. Make sure that no options were specified
4378                  * which would imply -o text because --output would be
4379                  * ambiguous in this case. For example, this is wrong:
4380                  *
4381                  *     babeltrace --names=all -o ctf --output=/tmp/path my-trace
4382                  *
4383                  * because --names=all implies -o text, and --output
4384                  * could apply to both the sink.text.pretty and
4385                  * sink.ctf.fs implicit components.
4386                  */
4387                 if (implicit_text_args.exists) {
4388                         printf_err("Ambiguous --output option: --output-format=ctf specified but another option implies --output-format=text\n");
4389                         goto error;
4390                 }
4391         }
4392
4393         /*
4394          * If -o dummy and -o ctf were not specified, and if there are
4395          * no explicit sink components, then use an implicit
4396          * `sink.text.pretty` component.
4397          */
4398         if (!implicit_dummy_args.exists && !implicit_ctf_output_args.exists &&
4399                         !sink_names) {
4400                 implicit_text_args.exists = true;
4401         }
4402
4403         /*
4404          * Set implicit `sink.text.pretty` or `sink.ctf.fs` component's
4405          * `path` parameter if --output was specified.
4406          */
4407         if (output) {
4408                 if (implicit_text_args.exists) {
4409                         append_implicit_component_extra_param(&implicit_text_args,
4410                                 "path", output);
4411                 } else if (implicit_ctf_output_args.exists) {
4412                         append_implicit_component_extra_param(&implicit_ctf_output_args,
4413                                 "path", output);
4414                 }
4415         }
4416
4417         /* Decide where the leftover argument(s) go */
4418         if (g_list_length(leftovers) > 0) {
4419                 if (implicit_lttng_live_args.exists) {
4420                         GString *gs_leftover;
4421
4422                         if (g_list_length(leftovers) > 1) {
4423                                 printf_err("Too many URLs specified for --output-format=lttng-live\n");
4424                                 goto error;
4425                         }
4426
4427                         gs_leftover = leftovers->data;
4428                         lttng_live_url_parts =
4429                                 bt_common_parse_lttng_live_url(gs_leftover->str,
4430                                         error_buf, sizeof(error_buf));
4431                         if (!lttng_live_url_parts.proto) {
4432                                 printf_err("Invalid LTTng live URL format: %s\n",
4433                                         error_buf);
4434                                 goto error;
4435                         }
4436
4437                         if (!lttng_live_url_parts.session_name) {
4438                                 /* Print LTTng live sessions */
4439                                 cfg = bt_config_print_lttng_live_sessions_create(
4440                                         plugin_paths);
4441                                 if (!cfg) {
4442                                         goto error;
4443                                 }
4444
4445                                 g_string_assign(cfg->cmd_data.print_lttng_live_sessions.url,
4446                                         gs_leftover->str);
4447
4448                                 if (output) {
4449                                         g_string_assign(
4450                                                 cfg->cmd_data.print_lttng_live_sessions.output_path,
4451                                                 output);
4452                                 }
4453
4454                                 goto end;
4455                         }
4456
4457                         ret = append_implicit_component_extra_param(
4458                                 &implicit_lttng_live_args, "url",
4459                                 gs_leftover->str);
4460                         if (ret) {
4461                                 goto error;
4462                         }
4463                 } else {
4464                         /*
4465                          * Append one implicit component argument set
4466                          * for each leftover (souce.ctf.fs paths). Copy
4467                          * the base implicit component arguments.
4468                          * Note that they still have to be named later.
4469                          */
4470                         ret = fill_implicit_ctf_inputs_args(
4471                                 implicit_ctf_inputs_args,
4472                                 &base_implicit_ctf_input_args, leftovers);
4473                         if (ret) {
4474                                 goto error;
4475                         }
4476                 }
4477         }
4478
4479         /*
4480          * Ensure mutual exclusion between implicit `source.ctf.fs` and
4481          * `source.ctf.lttng-live` components.
4482          */
4483         if (base_implicit_ctf_input_args.exists &&
4484                         implicit_lttng_live_args.exists) {
4485                 printf_err("Cannot create both implicit `%s` and `%s` components\n",
4486                         base_implicit_ctf_input_args.comp_arg->str,
4487                         implicit_lttng_live_args.comp_arg->str);
4488                 goto error;
4489         }
4490
4491         /*
4492          * If the implicit `source.ctf.fs` or `source.ctf.lttng-live`
4493          * components exists, make sure there's at least one leftover
4494          * (which is the path or URL).
4495          */
4496         if (base_implicit_ctf_input_args.exists &&
4497                         g_list_length(leftovers) == 0) {
4498                 printf_err("Missing path for implicit `%s` component\n",
4499                         base_implicit_ctf_input_args.comp_arg->str);
4500                 goto error;
4501         }
4502
4503         if (implicit_lttng_live_args.exists && g_list_length(leftovers) == 0) {
4504                 printf_err("Missing URL for implicit `%s` component\n",
4505                         implicit_lttng_live_args.comp_arg->str);
4506                 goto error;
4507         }
4508
4509         /* Assign names to implicit components */
4510         for (i = 0; i < implicit_ctf_inputs_args->len; i++) {
4511                 struct implicit_component_args *impl_args =
4512                         g_ptr_array_index(implicit_ctf_inputs_args, i);
4513
4514                 ret = assign_name_to_implicit_component(impl_args,
4515                         "source-ctf-fs", all_names, &source_names, true);
4516                 if (ret) {
4517                         goto error;
4518                 }
4519         }
4520
4521         ret = assign_name_to_implicit_component(&implicit_lttng_live_args,
4522                 "lttng-live", all_names, &source_names, true);
4523         if (ret) {
4524                 goto error;
4525         }
4526
4527         ret = assign_name_to_implicit_component(&implicit_text_args,
4528                 "pretty", all_names, &sink_names, true);
4529         if (ret) {
4530                 goto error;
4531         }
4532
4533         ret = assign_name_to_implicit_component(&implicit_ctf_output_args,
4534                 "sink-ctf-fs", all_names, &sink_names, true);
4535         if (ret) {
4536                 goto error;
4537         }
4538
4539         ret = assign_name_to_implicit_component(&implicit_dummy_args,
4540                 "dummy", all_names, &sink_names, true);
4541         if (ret) {
4542                 goto error;
4543         }
4544
4545         ret = assign_name_to_implicit_component(&implicit_muxer_args,
4546                 "muxer", all_names, NULL, false);
4547         if (ret) {
4548                 goto error;
4549         }
4550
4551         ret = assign_name_to_implicit_component(&implicit_trimmer_args,
4552                 "trimmer", all_names, NULL, false);
4553         if (ret) {
4554                 goto error;
4555         }
4556
4557         ret = assign_name_to_implicit_component(&implicit_debug_info_args,
4558                 "debug-info", all_names, NULL, false);
4559         if (ret) {
4560                 goto error;
4561         }
4562
4563         /* Make sure there's at least one source and one sink */
4564         if (!source_names) {
4565                 printf_err("No source component\n");
4566                 goto error;
4567         }
4568
4569         if (!sink_names) {
4570                 printf_err("No sink component\n");
4571                 goto error;
4572         }
4573
4574         /*
4575          * Prepend the muxer, the trimmer, and the debug info to the
4576          * filter chain so that we have:
4577          *
4578          *     sources -> muxer -> [trimmer] -> [debug info] ->
4579          *                [user filters] -> sinks
4580          */
4581         if (implicit_debug_info_args.exists) {
4582                 if (g_list_prepend_gstring(&filter_names,
4583                                 implicit_debug_info_args.name_arg->str)) {
4584                         goto error;
4585                 }
4586         }
4587
4588         if (implicit_trimmer_args.exists) {
4589                 if (g_list_prepend_gstring(&filter_names,
4590                                 implicit_trimmer_args.name_arg->str)) {
4591                         goto error;
4592                 }
4593         }
4594
4595         if (g_list_prepend_gstring(&filter_names,
4596                         implicit_muxer_args.name_arg->str)) {
4597                 goto error;
4598         }
4599
4600         /*
4601          * Append the equivalent run arguments for the implicit
4602          * components.
4603          */
4604         for (i = 0; i < implicit_ctf_inputs_args->len; i++) {
4605                 struct implicit_component_args *impl_args =
4606                         g_ptr_array_index(implicit_ctf_inputs_args, i);
4607
4608                 ret = append_run_args_for_implicit_component(impl_args,
4609                         run_args);
4610                 if (ret) {
4611                         goto error;
4612                 }
4613         }
4614
4615         ret = append_run_args_for_implicit_component(&implicit_lttng_live_args,
4616                 run_args);
4617         if (ret) {
4618                 goto error;
4619         }
4620
4621         ret = append_run_args_for_implicit_component(&implicit_text_args,
4622                 run_args);
4623         if (ret) {
4624                 goto error;
4625         }
4626
4627         ret = append_run_args_for_implicit_component(&implicit_ctf_output_args,
4628                 run_args);
4629         if (ret) {
4630                 goto error;
4631         }
4632
4633         ret = append_run_args_for_implicit_component(&implicit_dummy_args,
4634                 run_args);
4635         if (ret) {
4636                 goto error;
4637         }
4638
4639         ret = append_run_args_for_implicit_component(&implicit_muxer_args,
4640                 run_args);
4641         if (ret) {
4642                 goto error;
4643         }
4644
4645         ret = append_run_args_for_implicit_component(&implicit_trimmer_args,
4646                 run_args);
4647         if (ret) {
4648                 goto error;
4649         }
4650
4651         ret = append_run_args_for_implicit_component(&implicit_debug_info_args,
4652                 run_args);
4653         if (ret) {
4654                 goto error;
4655         }
4656
4657         /* Auto-connect components */
4658         ret = convert_auto_connect(run_args, source_names, filter_names,
4659                         sink_names);
4660         if (ret) {
4661                 printf_err("Cannot auto-connect components\n");
4662                 goto error;
4663         }
4664
4665         /*
4666          * We have all the run command arguments now. Depending on
4667          * --run-args, we pass this to the run command or print them
4668          * here.
4669          */
4670         if (print_run_args || print_run_args_0) {
4671                 if (stream_intersection_mode) {
4672                         printf_err("Cannot specify --stream-intersection with --run-args or --run-args-0\n");
4673                         goto error;
4674                 }
4675
4676                 for (i = 0; i < bt_value_array_get_size(run_args); i++) {
4677                         const struct bt_value *arg_value =
4678                                 bt_value_array_borrow_element_by_index(run_args,
4679                                                                        i);
4680                         const char *arg;
4681                         GString *quoted = NULL;
4682                         const char *arg_to_print;
4683
4684                         BT_ASSERT(arg_value);
4685                         arg = bt_value_string_get(arg_value);
4686
4687                         if (print_run_args) {
4688                                 quoted = bt_common_shell_quote(arg, true);
4689                                 if (!quoted) {
4690                                         goto error;
4691                                 }
4692
4693                                 arg_to_print = quoted->str;
4694                         } else {
4695                                 arg_to_print = arg;
4696                         }
4697
4698                         printf("%s", arg_to_print);
4699
4700                         if (quoted) {
4701                                 g_string_free(quoted, TRUE);
4702                         }
4703
4704                         if (i < bt_value_array_get_size(run_args) - 1) {
4705                                 if (print_run_args) {
4706                                         putchar(' ');
4707                                 } else {
4708                                         putchar('\0');
4709                                 }
4710                         }
4711                 }
4712
4713                 *retcode = -1;
4714                 BT_OBJECT_PUT_REF_AND_RESET(cfg);
4715                 goto end;
4716         }
4717
4718         cfg = bt_config_run_from_args_array(run_args, retcode,
4719                                             force_omit_system_plugin_path,
4720                                             force_omit_home_plugin_path,
4721                                             initial_plugin_paths);
4722         if (!cfg) {
4723                 goto error;
4724         }
4725
4726         cfg->cmd_data.run.stream_intersection_mode = stream_intersection_mode;
4727         goto end;
4728
4729 error:
4730         *retcode = 1;
4731         BT_OBJECT_PUT_REF_AND_RESET(cfg);
4732
4733 end:
4734         if (pc) {
4735                 poptFreeContext(pc);
4736         }
4737
4738         free(arg);
4739         free(output);
4740
4741         if (cur_name) {
4742                 g_string_free(cur_name, TRUE);
4743         }
4744
4745         if (cur_name_prefix) {
4746                 g_string_free(cur_name_prefix, TRUE);
4747         }
4748
4749         if (implicit_ctf_inputs_args) {
4750                 g_ptr_array_free(implicit_ctf_inputs_args, TRUE);
4751         }
4752
4753         bt_object_put_ref(run_args);
4754         bt_object_put_ref(all_names);
4755         destroy_glist_of_gstring(source_names);
4756         destroy_glist_of_gstring(filter_names);
4757         destroy_glist_of_gstring(sink_names);
4758         destroy_glist_of_gstring(leftovers);
4759         finalize_implicit_component_args(&base_implicit_ctf_input_args);
4760         finalize_implicit_component_args(&implicit_ctf_output_args);
4761         finalize_implicit_component_args(&implicit_lttng_live_args);
4762         finalize_implicit_component_args(&implicit_dummy_args);
4763         finalize_implicit_component_args(&implicit_text_args);
4764         finalize_implicit_component_args(&implicit_debug_info_args);
4765         finalize_implicit_component_args(&implicit_muxer_args);
4766         finalize_implicit_component_args(&implicit_trimmer_args);
4767         bt_object_put_ref(plugin_paths);
4768         bt_common_destroy_lttng_live_url_parts(&lttng_live_url_parts);
4769         return cfg;
4770 }
4771
4772 /*
4773  * Prints the Babeltrace 2.x general usage.
4774  */
4775 static
4776 void print_gen_usage(FILE *fp)
4777 {
4778         fprintf(fp, "Usage: babeltrace [GENERAL OPTIONS] [COMMAND] [COMMAND ARGUMENTS]\n");
4779         fprintf(fp, "\n");
4780         fprintf(fp, "General options:\n");
4781         fprintf(fp, "\n");
4782         fprintf(fp, "  -d, --debug          Enable debug mode (same as --log-level=V)\n");
4783         fprintf(fp, "  -h, --help           Show this help and quit\n");
4784         fprintf(fp, "  -l, --log-level=LVL  Set all log levels to LVL (`N`, `V`, `D`,\n");
4785         fprintf(fp, "                       `I`, `W` (default), `E`, or `F`)\n");
4786         fprintf(fp, "  -v, --verbose        Enable verbose mode (same as --log-level=I)\n");
4787         fprintf(fp, "  -V, --version        Show version and quit\n");
4788         fprintf(fp, "\n");
4789         fprintf(fp, "Available commands:\n");
4790         fprintf(fp, "\n");
4791         fprintf(fp, "    convert       Convert and trim traces (default)\n");
4792         fprintf(fp, "    help          Get help for a plugin or a component class\n");
4793         fprintf(fp, "    list-plugins  List available plugins and their content\n");
4794         fprintf(fp, "    query         Query objects from a component class\n");
4795         fprintf(fp, "    run           Build a processing graph and run it\n");
4796         fprintf(fp, "\n");
4797         fprintf(fp, "Use `babeltrace COMMAND --help` to show the help of COMMAND.\n");
4798 }
4799
4800 static
4801 char log_level_from_arg(const char *arg)
4802 {
4803         char level = 'U';
4804
4805         if (strcmp(arg, "VERBOSE") == 0 ||
4806                         strcmp(arg, "V") == 0) {
4807                 level = 'V';
4808         } else if (strcmp(arg, "DEBUG") == 0 ||
4809                         strcmp(arg, "D") == 0) {
4810                 level = 'D';
4811         } else if (strcmp(arg, "INFO") == 0 ||
4812                         strcmp(arg, "I") == 0) {
4813                 level = 'I';
4814         } else if (strcmp(arg, "WARN") == 0 ||
4815                         strcmp(arg, "WARNING") == 0 ||
4816                         strcmp(arg, "W") == 0) {
4817                 level = 'W';
4818         } else if (strcmp(arg, "ERROR") == 0 ||
4819                         strcmp(arg, "E") == 0) {
4820                 level = 'E';
4821         } else if (strcmp(arg, "FATAL") == 0 ||
4822                         strcmp(arg, "F") == 0) {
4823                 level = 'F';
4824         } else if (strcmp(arg, "NONE") == 0 ||
4825                         strcmp(arg, "N") == 0) {
4826                 level = 'N';
4827         }
4828
4829         return level;
4830 }
4831
4832 struct bt_config *bt_config_cli_args_create(int argc, const char *argv[],
4833                 int *retcode, bool force_omit_system_plugin_path,
4834                 bool force_omit_home_plugin_path,
4835                 const struct bt_value *initial_plugin_paths)
4836 {
4837         struct bt_config *config = NULL;
4838         int i;
4839         const char **command_argv = NULL;
4840         int command_argc = -1;
4841         const char *command_name = NULL;
4842         char log_level = 'U';
4843
4844         enum command_type {
4845                 COMMAND_TYPE_NONE = -1,
4846                 COMMAND_TYPE_RUN = 0,
4847                 COMMAND_TYPE_CONVERT,
4848                 COMMAND_TYPE_LIST_PLUGINS,
4849                 COMMAND_TYPE_HELP,
4850                 COMMAND_TYPE_QUERY,
4851         } command_type = COMMAND_TYPE_NONE;
4852
4853         *retcode = -1;
4854
4855         if (!initial_plugin_paths) {
4856                 initial_plugin_paths = bt_value_array_create();
4857                 if (!initial_plugin_paths) {
4858                         *retcode = 1;
4859                         goto end;
4860                 }
4861         } else {
4862                 bt_object_get_ref(initial_plugin_paths);
4863         }
4864
4865         if (argc <= 1) {
4866                 print_version();
4867                 puts("");
4868                 print_gen_usage(stdout);
4869                 goto end;
4870         }
4871
4872         for (i = 1; i < argc; i++) {
4873                 const char *cur_arg = argv[i];
4874                 const char *next_arg = i == (argc - 1) ? NULL : argv[i + 1];
4875
4876                 if (strcmp(cur_arg, "-d") == 0 ||
4877                                 strcmp(cur_arg, "--debug") == 0) {
4878                         log_level = 'V';
4879                 } else if (strcmp(cur_arg, "-v") == 0 ||
4880                                 strcmp(cur_arg, "--verbose") == 0) {
4881                         if (log_level != 'V' && log_level != 'D') {
4882                                 /*
4883                                  * Legacy: do not override a previous
4884                                  * --debug because --verbose and --debug
4885                                  * can be specified together (in this
4886                                  * case we want the lowest log level to
4887                                  * apply, VERBOSE).
4888                                  */
4889                                 log_level = 'I';
4890                         }
4891                 } else if (strcmp(cur_arg, "--log-level") == 0 ||
4892                                 strcmp(cur_arg, "-l") == 0) {
4893                         if (!next_arg) {
4894                                 printf_err("Missing log level value for --log-level option\n");
4895                                 *retcode = 1;
4896                                 goto end;
4897                         }
4898
4899                         log_level = log_level_from_arg(next_arg);
4900                         if (log_level == 'U') {
4901                                 printf_err("Invalid argument for --log-level option:\n    %s\n",
4902                                         next_arg);
4903                                 *retcode = 1;
4904                                 goto end;
4905                         }
4906
4907                         i++;
4908                 } else if (strncmp(cur_arg, "--log-level=", 12) == 0) {
4909                         const char *arg = &cur_arg[12];
4910
4911                         log_level = log_level_from_arg(arg);
4912                         if (log_level == 'U') {
4913                                 printf_err("Invalid argument for --log-level option:\n    %s\n",
4914                                         arg);
4915                                 *retcode = 1;
4916                                 goto end;
4917                         }
4918                 } else if (strncmp(cur_arg, "-l", 2) == 0) {
4919                         const char *arg = &cur_arg[2];
4920
4921                         log_level = log_level_from_arg(arg);
4922                         if (log_level == 'U') {
4923                                 printf_err("Invalid argument for --log-level option:\n    %s\n",
4924                                         arg);
4925                                 *retcode = 1;
4926                                 goto end;
4927                         }
4928                 } else if (strcmp(cur_arg, "-V") == 0 ||
4929                                 strcmp(cur_arg, "--version") == 0) {
4930                         print_version();
4931                         goto end;
4932                 } else if (strcmp(cur_arg, "-h") == 0 ||
4933                                 strcmp(cur_arg, "--help") == 0) {
4934                         print_gen_usage(stdout);
4935                         goto end;
4936                 } else {
4937                         /*
4938                          * First unknown argument: is it a known command
4939                          * name?
4940                          */
4941                         command_argv = &argv[i];
4942                         command_argc = argc - i;
4943
4944                         if (strcmp(cur_arg, "convert") == 0) {
4945                                 command_type = COMMAND_TYPE_CONVERT;
4946                         } else if (strcmp(cur_arg, "list-plugins") == 0) {
4947                                 command_type = COMMAND_TYPE_LIST_PLUGINS;
4948                         } else if (strcmp(cur_arg, "help") == 0) {
4949                                 command_type = COMMAND_TYPE_HELP;
4950                         } else if (strcmp(cur_arg, "query") == 0) {
4951                                 command_type = COMMAND_TYPE_QUERY;
4952                         } else if (strcmp(cur_arg, "run") == 0) {
4953                                 command_type = COMMAND_TYPE_RUN;
4954                         } else {
4955                                 /*
4956                                  * Unknown argument, but not a known
4957                                  * command name: assume the default
4958                                  * `convert` command.
4959                                  */
4960                                 command_type = COMMAND_TYPE_CONVERT;
4961                                 command_name = "convert";
4962                                 command_argv = &argv[i - 1];
4963                                 command_argc = argc - i + 1;
4964                         }
4965                         break;
4966                 }
4967         }
4968
4969         if (command_type == COMMAND_TYPE_NONE) {
4970                 /*
4971                  * We only got non-help, non-version general options
4972                  * like --verbose and --debug, without any other
4973                  * arguments, so we can't do anything useful: print the
4974                  * usage and quit.
4975                  */
4976                 print_gen_usage(stdout);
4977                 goto end;
4978         }
4979
4980         BT_ASSERT(command_argv);
4981         BT_ASSERT(command_argc >= 0);
4982
4983         switch (command_type) {
4984         case COMMAND_TYPE_RUN:
4985                 config = bt_config_run_from_args(command_argc, command_argv,
4986                         retcode, force_omit_system_plugin_path,
4987                         force_omit_home_plugin_path, initial_plugin_paths);
4988                 break;
4989         case COMMAND_TYPE_CONVERT:
4990                 config = bt_config_convert_from_args(command_argc, command_argv,
4991                         retcode, force_omit_system_plugin_path,
4992                         force_omit_home_plugin_path,
4993                         initial_plugin_paths, &log_level);
4994                 break;
4995         case COMMAND_TYPE_LIST_PLUGINS:
4996                 config = bt_config_list_plugins_from_args(command_argc,
4997                         command_argv, retcode, force_omit_system_plugin_path,
4998                         force_omit_home_plugin_path, initial_plugin_paths);
4999                 break;
5000         case COMMAND_TYPE_HELP:
5001                 config = bt_config_help_from_args(command_argc,
5002                         command_argv, retcode, force_omit_system_plugin_path,
5003                         force_omit_home_plugin_path, initial_plugin_paths);
5004                 break;
5005         case COMMAND_TYPE_QUERY:
5006                 config = bt_config_query_from_args(command_argc,
5007                         command_argv, retcode, force_omit_system_plugin_path,
5008                         force_omit_home_plugin_path, initial_plugin_paths);
5009                 break;
5010         default:
5011                 abort();
5012         }
5013
5014         if (config) {
5015                 if (log_level == 'U') {
5016                         log_level = 'W';
5017                 }
5018
5019                 config->log_level = log_level;
5020                 config->command_name = command_name;
5021         }
5022
5023 end:
5024         bt_object_put_ref(initial_plugin_paths);
5025         return config;
5026 }