converter/babeltrace.c

   1 /*
   2  * babeltrace.c
   3  *
   4  * Babeltrace Trace Converter
   5  *
   6  * Copyright 2010-2011 EfficiOS Inc. and Linux Foundation
   7  *
   8  * Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   9  *
  10  * Permission is hereby granted, free of charge, to any person obtaining a copy
  11  * of this software and associated documentation files (the "Software"), to deal
  12  * in the Software without restriction, including without limitation the rights
  13  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  14  * copies of the Software, and to permit persons to whom the Software is
  15  * furnished to do so, subject to the following conditions:
  16  *
  17  * The above copyright notice and this permission notice shall be included in
  18  * all copies or substantial portions of the Software.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  21  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  23  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  24  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  25  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  26  * SOFTWARE.
  27  */
  28
  29 #define _GNU_SOURCE
  30 #include <config.h>
  31 #include <babeltrace/babeltrace.h>
  32 #include <babeltrace/format.h>
  33 #include <babeltrace/context.h>
  34 #include <babeltrace/ctf/types.h>
  35 #include <babeltrace/ctf/events.h>
  36 /* TODO: fix object model for format-agnostic callbacks */
  37 #include <babeltrace/ctf/events-internal.h>
  38 #include <babeltrace/ctf/iterator.h>
  39 #include <babeltrace/ctf-text/types.h>
  40 #include <babeltrace/iterator.h>
  41 #include <popt.h>
  42 #include <errno.h>
  43 #include <stdlib.h>
  44 #include <ctype.h>
  45 #include <sys/stat.h>
  46 #include <sys/types.h>
  47 #include <fcntl.h>
  48 #include <unistd.h>
  49 #include <inttypes.h>
  50 #include <ftw.h>
  51 #include <string.h>
  52
  53 #include <babeltrace/ctf-ir/metadata.h> /* for clocks */
  54
  55 #define PARTIAL_ERROR_SLEEP     3       /* 3 seconds */
  56
  57 #define DEFAULT_FILE_ARRAY_SIZE 1
  58
  59 static char *opt_input_format, *opt_output_format;
  60
  61 /*
  62  * We are not freeing opt_input_paths ipath elements when exiting from
  63  * main() for backward compatibility with libpop 0.13, which does not
  64  * allocate copies for arguments returned by poptGetArg(), and for
  65  * general compatibility with the documented behavior. This is known to
  66  * cause a small memory leak with libpop 0.16.
  67  */
  68 static GPtrArray *opt_input_paths;
  69 static char *opt_output_path;
  70
  71 static struct format *fmt_read;
  72
  73 static
  74 void strlower(char *str)
  75 {
  76         while (*str) {
  77                 *str = tolower((int) *str);
  78                 str++;
  79         }
  80 }
  81
  82 enum {
  83         OPT_NONE = 0,
  84         OPT_OUTPUT_PATH,
  85         OPT_INPUT_FORMAT,
  86         OPT_OUTPUT_FORMAT,
  87         OPT_HELP,
  88         OPT_LIST,
  89         OPT_VERBOSE,
  90         OPT_DEBUG,
  91         OPT_NAMES,
  92         OPT_FIELDS,
  93         OPT_NO_DELTA,
  94         OPT_CLOCK_OFFSET,
  95         OPT_CLOCK_CYCLES,
  96         OPT_CLOCK_SECONDS,
  97         OPT_CLOCK_DATE,
  98         OPT_CLOCK_GMT,
  99         OPT_CLOCK_FORCE_CORRELATE,
 100 };
 101
 102 /*
 103  * We are _not_ using POPT_ARG_STRING ability to store directly into
 104  * variables, because we want to cast the return to non-const, which is
 105  * not possible without using poptGetOptArg explicitly. This helps us
 106  * controlling memory allocation correctly without making assumptions
 107  * about undocumented behaviors. poptGetOptArg is documented as
 108  * requiring the returned const char * to be freed by the caller.
 109  */
 110 static struct poptOption long_options[] = {
 111         /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
 112         { "output", 'w', POPT_ARG_STRING, NULL, OPT_NONE, NULL, NULL },
 113         { "input-format", 'i', POPT_ARG_STRING, NULL, OPT_INPUT_FORMAT, NULL, NULL },
 114         { "output-format", 'o', POPT_ARG_STRING, NULL, OPT_OUTPUT_FORMAT, NULL, NULL },
 115         { "help", 'h', POPT_ARG_NONE, NULL, OPT_HELP, NULL, NULL },
 116         { "list", 'l', POPT_ARG_NONE, NULL, OPT_LIST, NULL, NULL },
 117         { "verbose", 'v', POPT_ARG_NONE, NULL, OPT_VERBOSE, NULL, NULL },
 118         { "debug", 'd', POPT_ARG_NONE, NULL, OPT_DEBUG, NULL, NULL },
 119         { "names", 'n', POPT_ARG_STRING, NULL, OPT_NAMES, NULL, NULL },
 120         { "fields", 'f', POPT_ARG_STRING, NULL, OPT_FIELDS, NULL, NULL },
 121         { "no-delta", 0, POPT_ARG_NONE, NULL, OPT_NO_DELTA, NULL, NULL },
 122         { "clock-offset", 0, POPT_ARG_STRING, NULL, OPT_CLOCK_OFFSET, NULL, NULL },
 123         { "clock-cycles", 0, POPT_ARG_NONE, NULL, OPT_CLOCK_CYCLES, NULL, NULL },
 124         { "clock-seconds", 0, POPT_ARG_NONE, NULL, OPT_CLOCK_SECONDS, NULL, NULL },
 125         { "clock-date", 0, POPT_ARG_NONE, NULL, OPT_CLOCK_DATE, NULL, NULL },
 126         { "clock-gmt", 0, POPT_ARG_NONE, NULL, OPT_CLOCK_GMT, NULL, NULL },
 127         { "clock-force-correlate", 0, POPT_ARG_NONE, NULL, OPT_CLOCK_FORCE_CORRELATE, NULL, NULL },
 128         { NULL, 0, 0, NULL, 0, NULL, NULL },
 129 };
 130
 131 static void list_formats(FILE *fp)
 132 {
 133         fprintf(fp, "\n");
 134         bt_fprintf_format_list(fp);
 135 }
 136
 137 static void usage(FILE *fp)
 138 {
 139         fprintf(fp, "BabelTrace Trace Viewer and Converter %s\n\n", VERSION);
 140         fprintf(fp, "usage : babeltrace [OPTIONS] FILE...\n");
 141         fprintf(fp, "\n");
 142         fprintf(fp, "  FILE                           Input trace file(s) and/or directory(ies)\n");
 143         fprintf(fp, "                                     (space-separated)\n");
 144         fprintf(fp, "  -w, --output OUTPUT            Output trace path (default: stdout)\n");
 145         fprintf(fp, "\n");
 146         fprintf(fp, "  -i, --input-format FORMAT      Input trace format (default: ctf)\n");
 147         fprintf(fp, "  -o, --output-format FORMAT     Output trace format (default: text)\n");
 148         fprintf(fp, "\n");
 149         fprintf(fp, "  -h, --help                     This help message\n");
 150         fprintf(fp, "  -l, --list                     List available formats\n");
 151         fprintf(fp, "  -v, --verbose                  Verbose mode\n");
 152         fprintf(fp, "                                 (or set BABELTRACE_VERBOSE environment variable)\n");
 153         fprintf(fp, "  -d, --debug                    Debug mode\n");
 154         fprintf(fp, "                                 (or set BABELTRACE_DEBUG environment variable)\n");
 155         fprintf(fp, "      --no-delta                 Do not print time delta between consecutive events\n");
 156         fprintf(fp, "  -n, --names name1<,name2,...>  Print field names:\n");
 157         fprintf(fp, "                                     (payload OR args OR arg)\n");
 158         fprintf(fp, "                                     none, all, scope, header, (context OR ctx)\n");
 159         fprintf(fp, "                                        (default: payload,context)\n");
 160         fprintf(fp, "  -f, --fields name1<,name2,...> Print additional fields:\n");
 161         fprintf(fp, "                                     all, trace, trace:hostname, trace:domain,\n");
 162         fprintf(fp, "                                     trace:procname, trace:vpid, loglevel, emf, callsite.\n");
 163         fprintf(fp, "                                     (default: trace:hostname,trace:procname,trace:vpid)\n");
 164         fprintf(fp, "      --clock-cycles             Timestamp in cycles\n");
 165         fprintf(fp, "      --clock-offset seconds     Clock offset in seconds\n");
 166         fprintf(fp, "      --clock-seconds            Print the timestamps as [sec.ns]\n");
 167         fprintf(fp, "                                 (default is: [hh:mm:ss.ns])\n");
 168         fprintf(fp, "      --clock-date               Print clock date\n");
 169         fprintf(fp, "      --clock-gmt                Print clock in GMT time zone (default: local time zone)\n");
 170         fprintf(fp, "      --clock-force-correlate    Assume that clocks are inherently correlated\n");
 171         fprintf(fp, "                                 across traces.\n");
 172         list_formats(fp);
 173         fprintf(fp, "\n");
 174 }
 175
 176 static int get_names_args(poptContext *pc)
 177 {
 178         char *str, *strlist, *strctx;
 179         int ret = 0;
 180
 181         opt_payload_field_names = 0;
 182         opt_context_field_names = 0;
 183         strlist = (char *) poptGetOptArg(*pc);
 184         if (!strlist) {
 185                 return -EINVAL;
 186         }
 187         str = strtok_r(strlist, ",", &strctx);
 188         do {
 189                 if (!strcmp(str, "all"))
 190                         opt_all_field_names = 1;
 191                 else if (!strcmp(str, "scope"))
 192                         opt_scope_field_names = 1;
 193                 else if (!strcmp(str, "context") || !strcmp(str, "ctx"))
 194                         opt_context_field_names = 1;
 195                 else if (!strcmp(str, "header"))
 196                         opt_header_field_names = 1;
 197                 else if (!strcmp(str, "payload") || !strcmp(str, "args") || !strcmp(str, "arg"))
 198                         opt_payload_field_names = 1;
 199                 else if (!strcmp(str, "none")) {
 200                         opt_all_field_names = 0;
 201                         opt_scope_field_names = 0;
 202                         opt_context_field_names = 0;
 203                         opt_header_field_names = 0;
 204                         opt_payload_field_names = 0;
 205                 } else {
 206                         fprintf(stderr, "[error] unknown field name type %s\n", str);
 207                         free(strlist);
 208                         ret = -EINVAL;
 209                         goto end;
 210                 }
 211         } while ((str = strtok_r(NULL, ",", &strctx)));
 212 end:
 213         free(strlist);
 214         return ret;
 215 }
 216
 217 static int get_fields_args(poptContext *pc)
 218 {
 219         char *str, *strlist, *strctx;
 220         int ret = 0;
 221
 222         strlist = (char *) poptGetOptArg(*pc);
 223         if (!strlist) {
 224                 return -EINVAL;
 225         }
 226         str = strtok_r(strlist, ",", &strctx);
 227         do {
 228                 opt_trace_default_fields = 0;
 229                 if (!strcmp(str, "all"))
 230                         opt_all_fields = 1;
 231                 else if (!strcmp(str, "trace"))
 232                         opt_trace_field = 1;
 233                 else if (!strcmp(str, "trace:hostname"))
 234                         opt_trace_hostname_field = 1;
 235                 else if (!strcmp(str, "trace:domain"))
 236                         opt_trace_domain_field = 1;
 237                 else if (!strcmp(str, "trace:procname"))
 238                         opt_trace_procname_field = 1;
 239                 else if (!strcmp(str, "trace:vpid"))
 240                         opt_trace_vpid_field = 1;
 241                 else if (!strcmp(str, "loglevel"))
 242                         opt_loglevel_field = 1;
 243                 else if (!strcmp(str, "emf"))
 244                         opt_emf_field = 1;
 245                 else if (!strcmp(str, "callsite"))
 246                         opt_callsite_field = 1;
 247                 else {
 248                         fprintf(stderr, "[error] unknown field type %s\n", str);
 249                         ret = -EINVAL;
 250                         goto end;
 251                 }
 252         } while ((str = strtok_r(NULL, ",", &strctx)));
 253 end:
 254         free(strlist);
 255         return ret;
 256 }
 257
 258 /*
 259  * Return 0 if caller should continue, < 0 if caller should return
 260  * error, > 0 if caller should exit without reporting error.
 261  */
 262 static int parse_options(int argc, char **argv)
 263 {
 264         poptContext pc;
 265         int opt, ret = 0;
 266         const char *ipath;
 267
 268         if (argc == 1) {
 269                 usage(stdout);
 270                 return 1;       /* exit cleanly */
 271         }
 272
 273         pc = poptGetContext(NULL, argc, (const char **) argv, long_options, 0);
 274         poptReadDefaultConfig(pc, 0);
 275
 276         /* set default */
 277         opt_context_field_names = 1;
 278         opt_payload_field_names = 1;
 279
 280         while ((opt = poptGetNextOpt(pc)) != -1) {
 281                 switch (opt) {
 282                 case OPT_OUTPUT_PATH:
 283                         opt_output_path = (char *) poptGetOptArg(pc);
 284                         if (!opt_output_path) {
 285                                 ret = -EINVAL;
 286                                 goto end;
 287                         }
 288                         break;
 289                 case OPT_INPUT_FORMAT:
 290                         opt_input_format = (char *) poptGetOptArg(pc);
 291                         if (!opt_input_format) {
 292                                 ret = -EINVAL;
 293                                 goto end;
 294                         }
 295                         break;
 296                 case OPT_OUTPUT_FORMAT:
 297                         opt_output_format = (char *) poptGetOptArg(pc);
 298                         if (!opt_output_format) {
 299                                 ret = -EINVAL;
 300                                 goto end;
 301                         }
 302                         break;
 303                 case OPT_HELP:
 304                         usage(stdout);
 305                         ret = 1;        /* exit cleanly */
 306                         goto end;
 307                 case OPT_LIST:
 308                         list_formats(stdout);
 309                         ret = 1;
 310                         goto end;
 311                 case OPT_VERBOSE:
 312                         babeltrace_verbose = 1;
 313                         break;
 314                 case OPT_NAMES:
 315                         if (get_names_args(&pc)) {
 316                                 ret = -EINVAL;
 317                                 goto end;
 318                         }
 319                         break;
 320                 case OPT_FIELDS:
 321                         if (get_fields_args(&pc)) {
 322                                 ret = -EINVAL;
 323                                 goto end;
 324                         }
 325                         break;
 326                 case OPT_DEBUG:
 327                         babeltrace_debug = 1;
 328                         break;
 329                 case OPT_NO_DELTA:
 330                         opt_delta_field = 0;
 331                         break;
 332                 case OPT_CLOCK_CYCLES:
 333                         opt_clock_cycles = 1;
 334                         break;
 335                 case OPT_CLOCK_OFFSET:
 336                 {
 337                         char *str;
 338                         char *endptr;
 339
 340                         str = (char *) poptGetOptArg(pc);
 341                         if (!str) {
 342                                 fprintf(stderr, "[error] Missing --clock-offset argument\n");
 343                                 ret = -EINVAL;
 344                                 goto end;
 345                         }
 346                         errno = 0;
 347                         opt_clock_offset = strtoull(str, &endptr, 0);
 348                         if (*endptr != '\0' || str == endptr || errno != 0) {
 349                                 fprintf(stderr, "[error] Incorrect --clock-offset argument: %s\n", str);
 350                                 ret = -EINVAL;
 351                                 free(str);
 352                                 goto end;
 353                         }
 354                         free(str);
 355                         break;
 356                 }
 357                 case OPT_CLOCK_SECONDS:
 358                         opt_clock_seconds = 1;
 359                         break;
 360                 case OPT_CLOCK_DATE:
 361                         opt_clock_date = 1;
 362                         break;
 363                 case OPT_CLOCK_GMT:
 364                         opt_clock_gmt = 1;
 365                         break;
 366                 case OPT_CLOCK_FORCE_CORRELATE:
 367                         opt_clock_force_correlate = 1;
 368                         break;
 369
 370                 default:
 371                         ret = -EINVAL;
 372                         goto end;
 373                 }
 374         }
 375
 376         do {
 377                 ipath = poptGetArg(pc);
 378                 if (ipath)
 379                         g_ptr_array_add(opt_input_paths, (gpointer) ipath);
 380         } while (ipath);
 381         if (opt_input_paths->len == 0) {
 382                 ret = -EINVAL;
 383                 goto end;
 384         }
 385
 386 end:
 387         if (pc) {
 388                 poptFreeContext(pc);
 389         }
 390         return ret;
 391 }
 392
 393 static GPtrArray *traversed_paths = 0;
 394
 395 /*
 396  * traverse_trace_dir() is the callback function for File Tree Walk (nftw).
 397  * it receives the path of the current entry (file, dir, link..etc) with
 398  * a flag to indicate the type of the entry.
 399  * if the entry being visited is a directory and contains a metadata file,
 400  * then add the path to a global list to be processed later in
 401  * add_traces_recursive.
 402  */
 403 static int traverse_trace_dir(const char *fpath, const struct stat *sb,
 404                         int tflag, struct FTW *ftwbuf)
 405 {
 406         int dirfd, metafd;
 407         int closeret;
 408
 409         if (tflag != FTW_D)
 410                 return 0;
 411
 412         dirfd = open(fpath, 0);
 413         if (dirfd < 0) {
 414                 fprintf(stderr, "[error] [Context] Unable to open trace "
 415                         "directory file descriptor.\n");
 416                 return 0;       /* partial error */
 417         }
 418         metafd = openat(dirfd, "metadata", O_RDONLY);
 419         if (metafd < 0) {
 420                 closeret = close(dirfd);
 421                 if (closeret < 0) {
 422                         perror("close");
 423                         return -1;
 424                 }
 425                 /* No meta data, just return */
 426                 return 0;
 427         } else {
 428                 closeret = close(metafd);
 429                 if (closeret < 0) {
 430                         perror("close");
 431                         return -1;      /* failure */
 432                 }
 433                 closeret = close(dirfd);
 434                 if (closeret < 0) {
 435                         perror("close");
 436                         return -1;      /* failure */
 437                 }
 438
 439                 /* Add path to the global list */
 440                 if (traversed_paths == NULL) {
 441                         fprintf(stderr, "[error] [Context] Invalid open path array.\n");
 442                         return -1;
 443                 }
 444                 g_ptr_array_add(traversed_paths, g_string_new(fpath));
 445         }
 446
 447         return 0;
 448 }
 449
 450 /*
 451  * bt_context_add_traces_recursive: Open a trace recursively
 452  *
 453  * Find each trace present in the subdirectory starting from the given
 454  * path, and add them to the context. The packet_seek parameter can be
 455  * NULL: this specify to use the default format packet_seek.
 456  *
 457  * Return: 0 on success, < 0 on failure, > 0 on partial failure.
 458  * Unable to open toplevel: failure.
 459  * Unable to open some subdirectory or file: warn and continue (partial
 460  * failure);
 461  */
 462 int bt_context_add_traces_recursive(struct bt_context *ctx, const char *path,
 463                 const char *format_str,
 464                 void (*packet_seek)(struct stream_pos *pos,
 465                         size_t offset, int whence))
 466 {
 467
 468         GArray *trace_ids;
 469         int ret = 0;
 470
 471         /* Should lock traversed_paths mutex here if used in multithread */
 472
 473         traversed_paths = g_ptr_array_new();
 474         trace_ids = g_array_new(FALSE, TRUE, sizeof(int));
 475
 476         ret = nftw(path, traverse_trace_dir, 10, 0);
 477
 478         /* Process the array if ntfw did not return a fatal error */
 479         if (ret >= 0) {
 480                 int i;
 481
 482                 for (i = 0; i < traversed_paths->len; i++) {
 483                         GString *trace_path = g_ptr_array_index(traversed_paths,
 484                                                                 i);
 485                         int trace_id = bt_context_add_trace(ctx,
 486                                                             trace_path->str,
 487                                                             format_str,
 488                                                             packet_seek,
 489                                                             NULL,
 490                                                             NULL);
 491                         if (trace_id < 0) {
 492                                 fprintf(stderr, "[warning] [Context] cannot open trace \"%s\" from %s "
 493                                         "for reading.\n", trace_path->str, path);
 494                                 /* Allow to skip erroneous traces. */
 495                                 ret = 1;        /* partial error */
 496                         } else {
 497                                 g_array_append_val(trace_ids, trace_id);
 498                         }
 499                         g_string_free(trace_path, TRUE);
 500                 }
 501         }
 502
 503         g_ptr_array_free(traversed_paths, TRUE);
 504         traversed_paths = NULL;
 505
 506         /* Should unlock traversed paths mutex here if used in multithread */
 507
 508         /*
 509          * Return an error if no trace can be opened.
 510          */
 511         if (trace_ids->len == 0) {
 512                 fprintf(stderr, "[error] Cannot open any trace for reading.\n\n");
 513                 ret = -ENOENT;          /* failure */
 514         }
 515         g_array_free(trace_ids, TRUE);
 516         return ret;
 517 }
 518
 519 int convert_trace(struct trace_descriptor *td_write,
 520                   struct bt_context *ctx)
 521 {
 522         struct bt_ctf_iter *iter;
 523         struct ctf_text_stream_pos *sout;
 524         struct bt_iter_pos begin_pos;
 525         struct bt_ctf_event *ctf_event;
 526         int ret;
 527
 528         sout = container_of(td_write, struct ctf_text_stream_pos,
 529                         trace_descriptor);
 530
 531         begin_pos.type = BT_SEEK_BEGIN;
 532         iter = bt_ctf_iter_create(ctx, &begin_pos, NULL);
 533         if (!iter) {
 534                 ret = -1;
 535                 goto error_iter;
 536         }
 537         while ((ctf_event = bt_ctf_iter_read_event(iter))) {
 538                 ret = sout->parent.event_cb(&sout->parent, ctf_event->parent->stream);
 539                 if (ret) {
 540                         fprintf(stderr, "[error] Writing event failed.\n");
 541                         goto end;
 542                 }
 543                 ret = bt_iter_next(bt_ctf_get_iter(iter));
 544                 if (ret < 0)
 545                         goto end;
 546         }
 547         ret = 0;
 548
 549 end:
 550         bt_ctf_iter_destroy(iter);
 551 error_iter:
 552         return ret;
 553 }
 554
 555 int main(int argc, char **argv)
 556 {
 557         int ret, partial_error = 0, open_success = 0;
 558         struct format *fmt_write;
 559         struct trace_descriptor *td_write;
 560         struct bt_context *ctx;
 561         int i;
 562
 563         opt_input_paths = g_ptr_array_new();
 564
 565         ret = parse_options(argc, argv);
 566         if (ret < 0) {
 567                 fprintf(stderr, "Error parsing options.\n\n");
 568                 usage(stderr);
 569                 g_ptr_array_free(opt_input_paths, TRUE);
 570                 exit(EXIT_FAILURE);
 571         } else if (ret > 0) {
 572                 g_ptr_array_free(opt_input_paths, TRUE);
 573                 exit(EXIT_SUCCESS);
 574         }
 575         printf_verbose("Verbose mode active.\n");
 576         printf_debug("Debug mode active.\n");
 577
 578         if (opt_input_format)
 579                 strlower(opt_input_format);
 580         if (opt_output_format)
 581                 strlower(opt_output_format);
 582
 583         printf_verbose("Converting from directory(ies):\n");
 584         for (i = 0; i < opt_input_paths->len; i++) {
 585                 const char *ipath = g_ptr_array_index(opt_input_paths, i);
 586                 printf_verbose("    %s\n", ipath);
 587         }
 588         printf_verbose("Converting from format: %s\n",
 589                 opt_input_format ? : "ctf <default>");
 590         printf_verbose("Converting to directory: %s\n",
 591                 opt_output_path ? : "<stdout>");
 592         printf_verbose("Converting to format: %s\n",
 593                 opt_output_format ? : "text <default>");
 594
 595         if (!opt_input_format) {
 596                 opt_input_format = strdup("ctf");
 597                 if (!opt_input_format) {
 598                         partial_error = 1;
 599                         goto end;
 600                 }
 601         }
 602         if (!opt_output_format) {
 603                 opt_output_format = strdup("text");
 604                 if (!opt_output_format) {
 605                         partial_error = 1;
 606                         goto end;
 607                 }
 608         }
 609         fmt_read = bt_lookup_format(g_quark_from_static_string(opt_input_format));
 610         if (!fmt_read) {
 611                 fprintf(stderr, "[error] Format \"%s\" is not supported.\n\n",
 612                         opt_input_format);
 613                 partial_error = 1;
 614                 goto end;
 615         }
 616         fmt_write = bt_lookup_format(g_quark_from_static_string(opt_output_format));
 617         if (!fmt_write) {
 618                 fprintf(stderr, "[error] format \"%s\" is not supported.\n\n",
 619                         opt_output_format);
 620                 partial_error = 1;
 621                 goto end;
 622         }
 623
 624         ctx = bt_context_create();
 625         if (!ctx) {
 626                 goto error_td_read;
 627         }
 628
 629         for (i = 0; i < opt_input_paths->len; i++) {
 630                 const char *ipath = g_ptr_array_index(opt_input_paths, i);
 631                 ret = bt_context_add_traces_recursive(ctx, ipath,
 632                                 opt_input_format, NULL);
 633                 if (ret < 0) {
 634                         fprintf(stderr, "[error] opening trace \"%s\" for reading.\n\n",
 635                                 ipath);
 636                 } else if (ret > 0) {
 637                         fprintf(stderr, "[warning] errors occurred when opening trace \"%s\" for reading, continuing anyway.\n\n",
 638                                 ipath);
 639                         open_success = 1;       /* some traces were OK */
 640                         partial_error = 1;
 641                 } else {
 642                         open_success = 1;       /* all traces were OK */
 643                 }
 644         }
 645         if (!open_success) {
 646                 fprintf(stderr, "[error] none of the specified trace paths could be opened.\n\n");
 647                 goto error_td_read;
 648         }
 649
 650         td_write = fmt_write->open_trace(opt_output_path, O_RDWR, NULL, NULL);
 651         if (!td_write) {
 652                 fprintf(stderr, "Error opening trace \"%s\" for writing.\n\n",
 653                         opt_output_path ? : "<none>");
 654                 goto error_td_write;
 655         }
 656
 657         /*
 658          * Errors happened when opening traces, but we continue anyway.
 659          * sleep to let user see the stderr output before stdout.
 660          */
 661         if (partial_error)
 662                 sleep(PARTIAL_ERROR_SLEEP);
 663
 664         ret = convert_trace(td_write, ctx);
 665         if (ret) {
 666                 fprintf(stderr, "Error printing trace.\n\n");
 667                 goto error_copy_trace;
 668         }
 669
 670         fmt_write->close_trace(td_write);
 671
 672         bt_context_put(ctx);
 673         printf_verbose("finished converting. Output written to:\n%s\n",
 674                         opt_output_path ? : "<stdout>");
 675         goto end;
 676
 677         /* Error handling */
 678 error_copy_trace:
 679         fmt_write->close_trace(td_write);
 680 error_td_write:
 681         bt_context_put(ctx);
 682 error_td_read:
 683         partial_error = 1;
 684
 685         /* teardown and exit */
 686 end:
 687         free(opt_input_format);
 688         free(opt_output_format);
 689         free(opt_output_path);
 690         g_ptr_array_free(opt_input_paths, TRUE);
 691         if (partial_error)
 692                 exit(EXIT_FAILURE);
 693         else
 694                 exit(EXIT_SUCCESS);
 695 }