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 bt_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_OUTPUT_PATH, 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                         ret = -EINVAL;
 208                         goto end;
 209                 }
 210         } while ((str = strtok_r(NULL, ",", &strctx)));
 211 end:
 212         free(strlist);
 213         return ret;
 214 }
 215
 216 static int get_fields_args(poptContext *pc)
 217 {
 218         char *str, *strlist, *strctx;
 219         int ret = 0;
 220
 221         strlist = (char *) poptGetOptArg(*pc);
 222         if (!strlist) {
 223                 return -EINVAL;
 224         }
 225         str = strtok_r(strlist, ",", &strctx);
 226         do {
 227                 opt_trace_default_fields = 0;
 228                 if (!strcmp(str, "all"))
 229                         opt_all_fields = 1;
 230                 else if (!strcmp(str, "trace"))
 231                         opt_trace_field = 1;
 232                 else if (!strcmp(str, "trace:hostname"))
 233                         opt_trace_hostname_field = 1;
 234                 else if (!strcmp(str, "trace:domain"))
 235                         opt_trace_domain_field = 1;
 236                 else if (!strcmp(str, "trace:procname"))
 237                         opt_trace_procname_field = 1;
 238                 else if (!strcmp(str, "trace:vpid"))
 239                         opt_trace_vpid_field = 1;
 240                 else if (!strcmp(str, "loglevel"))
 241                         opt_loglevel_field = 1;
 242                 else if (!strcmp(str, "emf"))
 243                         opt_emf_field = 1;
 244                 else if (!strcmp(str, "callsite"))
 245                         opt_callsite_field = 1;
 246                 else {
 247                         fprintf(stderr, "[error] unknown field type %s\n", str);
 248                         ret = -EINVAL;
 249                         goto end;
 250                 }
 251         } while ((str = strtok_r(NULL, ",", &strctx)));
 252 end:
 253         free(strlist);
 254         return ret;
 255 }
 256
 257 /*
 258  * Return 0 if caller should continue, < 0 if caller should return
 259  * error, > 0 if caller should exit without reporting error.
 260  */
 261 static int parse_options(int argc, char **argv)
 262 {
 263         poptContext pc;
 264         int opt, ret = 0;
 265         const char *ipath;
 266
 267         if (argc == 1) {
 268                 usage(stdout);
 269                 return 1;       /* exit cleanly */
 270         }
 271
 272         pc = poptGetContext(NULL, argc, (const char **) argv, long_options, 0);
 273         poptReadDefaultConfig(pc, 0);
 274
 275         /* set default */
 276         opt_context_field_names = 1;
 277         opt_payload_field_names = 1;
 278
 279         while ((opt = poptGetNextOpt(pc)) != -1) {
 280                 switch (opt) {
 281                 case OPT_OUTPUT_PATH:
 282                         opt_output_path = (char *) poptGetOptArg(pc);
 283                         if (!opt_output_path) {
 284                                 ret = -EINVAL;
 285                                 goto end;
 286                         }
 287                         break;
 288                 case OPT_INPUT_FORMAT:
 289                         opt_input_format = (char *) poptGetOptArg(pc);
 290                         if (!opt_input_format) {
 291                                 ret = -EINVAL;
 292                                 goto end;
 293                         }
 294                         break;
 295                 case OPT_OUTPUT_FORMAT:
 296                         opt_output_format = (char *) poptGetOptArg(pc);
 297                         if (!opt_output_format) {
 298                                 ret = -EINVAL;
 299                                 goto end;
 300                         }
 301                         break;
 302                 case OPT_HELP:
 303                         usage(stdout);
 304                         ret = 1;        /* exit cleanly */
 305                         goto end;
 306                 case OPT_LIST:
 307                         list_formats(stdout);
 308                         ret = 1;
 309                         goto end;
 310                 case OPT_VERBOSE:
 311                         babeltrace_verbose = 1;
 312                         break;
 313                 case OPT_NAMES:
 314                         if (get_names_args(&pc)) {
 315                                 ret = -EINVAL;
 316                                 goto end;
 317                         }
 318                         break;
 319                 case OPT_FIELDS:
 320                         if (get_fields_args(&pc)) {
 321                                 ret = -EINVAL;
 322                                 goto end;
 323                         }
 324                         break;
 325                 case OPT_DEBUG:
 326                         babeltrace_debug = 1;
 327                         break;
 328                 case OPT_NO_DELTA:
 329                         opt_delta_field = 0;
 330                         break;
 331                 case OPT_CLOCK_CYCLES:
 332                         opt_clock_cycles = 1;
 333                         break;
 334                 case OPT_CLOCK_OFFSET:
 335                 {
 336                         char *str;
 337                         char *endptr;
 338
 339                         str = (char *) poptGetOptArg(pc);
 340                         if (!str) {
 341                                 fprintf(stderr, "[error] Missing --clock-offset argument\n");
 342                                 ret = -EINVAL;
 343                                 goto end;
 344                         }
 345                         errno = 0;
 346                         opt_clock_offset = strtoull(str, &endptr, 0);
 347                         if (*endptr != '\0' || str == endptr || errno != 0) {
 348                                 fprintf(stderr, "[error] Incorrect --clock-offset argument: %s\n", str);
 349                                 ret = -EINVAL;
 350                                 free(str);
 351                                 goto end;
 352                         }
 353                         free(str);
 354                         break;
 355                 }
 356                 case OPT_CLOCK_SECONDS:
 357                         opt_clock_seconds = 1;
 358                         break;
 359                 case OPT_CLOCK_DATE:
 360                         opt_clock_date = 1;
 361                         break;
 362                 case OPT_CLOCK_GMT:
 363                         opt_clock_gmt = 1;
 364                         break;
 365                 case OPT_CLOCK_FORCE_CORRELATE:
 366                         opt_clock_force_correlate = 1;
 367                         break;
 368
 369                 default:
 370                         ret = -EINVAL;
 371                         goto end;
 372                 }
 373         }
 374
 375         do {
 376                 ipath = poptGetArg(pc);
 377                 if (ipath)
 378                         g_ptr_array_add(opt_input_paths, (gpointer) ipath);
 379         } while (ipath);
 380         if (opt_input_paths->len == 0) {
 381                 ret = -EINVAL;
 382                 goto end;
 383         }
 384
 385 end:
 386         if (pc) {
 387                 poptFreeContext(pc);
 388         }
 389         return ret;
 390 }
 391
 392 static GPtrArray *traversed_paths = 0;
 393
 394 /*
 395  * traverse_trace_dir() is the callback function for File Tree Walk (nftw).
 396  * it receives the path of the current entry (file, dir, link..etc) with
 397  * a flag to indicate the type of the entry.
 398  * if the entry being visited is a directory and contains a metadata file,
 399  * then add the path to a global list to be processed later in
 400  * add_traces_recursive.
 401  */
 402 static int traverse_trace_dir(const char *fpath, const struct stat *sb,
 403                         int tflag, struct FTW *ftwbuf)
 404 {
 405         int dirfd, metafd;
 406         int closeret;
 407
 408         if (tflag != FTW_D)
 409                 return 0;
 410
 411         dirfd = open(fpath, 0);
 412         if (dirfd < 0) {
 413                 fprintf(stderr, "[error] [Context] Unable to open trace "
 414                         "directory file descriptor.\n");
 415                 return 0;       /* partial error */
 416         }
 417         metafd = openat(dirfd, "metadata", O_RDONLY);
 418         if (metafd < 0) {
 419                 closeret = close(dirfd);
 420                 if (closeret < 0) {
 421                         perror("close");
 422                         return -1;
 423                 }
 424                 /* No meta data, just return */
 425                 return 0;
 426         } else {
 427                 closeret = close(metafd);
 428                 if (closeret < 0) {
 429                         perror("close");
 430                         return -1;      /* failure */
 431                 }
 432                 closeret = close(dirfd);
 433                 if (closeret < 0) {
 434                         perror("close");
 435                         return -1;      /* failure */
 436                 }
 437
 438                 /* Add path to the global list */
 439                 if (traversed_paths == NULL) {
 440                         fprintf(stderr, "[error] [Context] Invalid open path array.\n");
 441                         return -1;
 442                 }
 443                 g_ptr_array_add(traversed_paths, g_string_new(fpath));
 444         }
 445
 446         return 0;
 447 }
 448
 449 /*
 450  * bt_context_add_traces_recursive: Open a trace recursively
 451  *
 452  * Find each trace present in the subdirectory starting from the given
 453  * path, and add them to the context. The packet_seek parameter can be
 454  * NULL: this specify to use the default format packet_seek.
 455  *
 456  * Return: 0 on success, < 0 on failure, > 0 on partial failure.
 457  * Unable to open toplevel: failure.
 458  * Unable to open some subdirectory or file: warn and continue (partial
 459  * failure);
 460  */
 461 int bt_context_add_traces_recursive(struct bt_context *ctx, const char *path,
 462                 const char *format_str,
 463                 void (*packet_seek)(struct bt_stream_pos *pos,
 464                         size_t offset, int whence))
 465 {
 466
 467         GArray *trace_ids;
 468         int ret = 0;
 469
 470         /* Should lock traversed_paths mutex here if used in multithread */
 471
 472         traversed_paths = g_ptr_array_new();
 473         trace_ids = g_array_new(FALSE, TRUE, sizeof(int));
 474
 475         ret = nftw(path, traverse_trace_dir, 10, 0);
 476
 477         /* Process the array if ntfw did not return a fatal error */
 478         if (ret >= 0) {
 479                 int i;
 480
 481                 for (i = 0; i < traversed_paths->len; i++) {
 482                         GString *trace_path = g_ptr_array_index(traversed_paths,
 483                                                                 i);
 484                         int trace_id = bt_context_add_trace(ctx,
 485                                                             trace_path->str,
 486                                                             format_str,
 487                                                             packet_seek,
 488                                                             NULL,
 489                                                             NULL);
 490                         if (trace_id < 0) {
 491                                 fprintf(stderr, "[warning] [Context] cannot open trace \"%s\" from %s "
 492                                         "for reading.\n", trace_path->str, path);
 493                                 /* Allow to skip erroneous traces. */
 494                                 ret = 1;        /* partial error */
 495                         } else {
 496                                 g_array_append_val(trace_ids, trace_id);
 497                         }
 498                         g_string_free(trace_path, TRUE);
 499                 }
 500         }
 501
 502         g_ptr_array_free(traversed_paths, TRUE);
 503         traversed_paths = NULL;
 504
 505         /* Should unlock traversed paths mutex here if used in multithread */
 506
 507         /*
 508          * Return an error if no trace can be opened.
 509          */
 510         if (trace_ids->len == 0) {
 511                 fprintf(stderr, "[error] Cannot open any trace for reading.\n\n");
 512                 ret = -ENOENT;          /* failure */
 513         }
 514         g_array_free(trace_ids, TRUE);
 515         return ret;
 516 }
 517
 518 int convert_trace(struct bt_trace_descriptor *td_write,
 519                   struct bt_context *ctx)
 520 {
 521         struct bt_ctf_iter *iter;
 522         struct ctf_text_stream_pos *sout;
 523         struct bt_iter_pos begin_pos;
 524         struct bt_ctf_event *ctf_event;
 525         int ret;
 526
 527         sout = container_of(td_write, struct ctf_text_stream_pos,
 528                         trace_descriptor);
 529
 530         begin_pos.type = BT_SEEK_BEGIN;
 531         iter = bt_ctf_iter_create(ctx, &begin_pos, NULL);
 532         if (!iter) {
 533                 ret = -1;
 534                 goto error_iter;
 535         }
 536         while ((ctf_event = bt_ctf_iter_read_event(iter))) {
 537                 ret = sout->parent.event_cb(&sout->parent, ctf_event->parent->stream);
 538                 if (ret) {
 539                         fprintf(stderr, "[error] Writing event failed.\n");
 540                         goto end;
 541                 }
 542                 ret = bt_iter_next(bt_ctf_get_iter(iter));
 543                 if (ret < 0)
 544                         goto end;
 545         }
 546         ret = 0;
 547
 548 end:
 549         bt_ctf_iter_destroy(iter);
 550 error_iter:
 551         return ret;
 552 }
 553
 554 int main(int argc, char **argv)
 555 {
 556         int ret, partial_error = 0, open_success = 0;
 557         struct bt_format *fmt_write;
 558         struct bt_trace_descriptor *td_write;
 559         struct bt_context *ctx;
 560         int i;
 561
 562         opt_input_paths = g_ptr_array_new();
 563
 564         ret = parse_options(argc, argv);
 565         if (ret < 0) {
 566                 fprintf(stderr, "Error parsing options.\n\n");
 567                 usage(stderr);
 568                 g_ptr_array_free(opt_input_paths, TRUE);
 569                 exit(EXIT_FAILURE);
 570         } else if (ret > 0) {
 571                 g_ptr_array_free(opt_input_paths, TRUE);
 572                 exit(EXIT_SUCCESS);
 573         }
 574         printf_verbose("Verbose mode active.\n");
 575         printf_debug("Debug mode active.\n");
 576
 577         if (opt_input_format)
 578                 strlower(opt_input_format);
 579         if (opt_output_format)
 580                 strlower(opt_output_format);
 581
 582         printf_verbose("Converting from directory(ies):\n");
 583         for (i = 0; i < opt_input_paths->len; i++) {
 584                 const char *ipath = g_ptr_array_index(opt_input_paths, i);
 585                 printf_verbose("    %s\n", ipath);
 586         }
 587         printf_verbose("Converting from format: %s\n",
 588                 opt_input_format ? : "ctf <default>");
 589         printf_verbose("Converting to directory: %s\n",
 590                 opt_output_path ? : "<stdout>");
 591         printf_verbose("Converting to format: %s\n",
 592                 opt_output_format ? : "text <default>");
 593
 594         if (!opt_input_format) {
 595                 opt_input_format = strdup("ctf");
 596                 if (!opt_input_format) {
 597                         partial_error = 1;
 598                         goto end;
 599                 }
 600         }
 601         if (!opt_output_format) {
 602                 opt_output_format = strdup("text");
 603                 if (!opt_output_format) {
 604                         partial_error = 1;
 605                         goto end;
 606                 }
 607         }
 608         fmt_read = bt_lookup_format(g_quark_from_static_string(opt_input_format));
 609         if (!fmt_read || fmt_read->name != g_quark_from_static_string("ctf")) {
 610                 fprintf(stderr, "[error] Format \"%s\" is not supported.\n\n",
 611                         opt_input_format);
 612                 partial_error = 1;
 613                 goto end;
 614         }
 615         fmt_write = bt_lookup_format(g_quark_from_static_string(opt_output_format));
 616         if (!fmt_write) {
 617                 fprintf(stderr, "[error] format \"%s\" is not supported.\n\n",
 618                         opt_output_format);
 619                 partial_error = 1;
 620                 goto end;
 621         }
 622
 623         ctx = bt_context_create();
 624         if (!ctx) {
 625                 goto error_td_read;
 626         }
 627
 628         for (i = 0; i < opt_input_paths->len; i++) {
 629                 const char *ipath = g_ptr_array_index(opt_input_paths, i);
 630                 ret = bt_context_add_traces_recursive(ctx, ipath,
 631                                 opt_input_format, NULL);
 632                 if (ret < 0) {
 633                         fprintf(stderr, "[error] opening trace \"%s\" for reading.\n\n",
 634                                 ipath);
 635                 } else if (ret > 0) {
 636                         fprintf(stderr, "[warning] errors occurred when opening trace \"%s\" for reading, continuing anyway.\n\n",
 637                                 ipath);
 638                         open_success = 1;       /* some traces were OK */
 639                         partial_error = 1;
 640                 } else {
 641                         open_success = 1;       /* all traces were OK */
 642                 }
 643         }
 644         if (!open_success) {
 645                 fprintf(stderr, "[error] none of the specified trace paths could be opened.\n\n");
 646                 goto error_td_read;
 647         }
 648
 649         td_write = fmt_write->open_trace(opt_output_path, O_RDWR, NULL, NULL);
 650         if (!td_write) {
 651                 fprintf(stderr, "Error opening trace \"%s\" for writing.\n\n",
 652                         opt_output_path ? : "<none>");
 653                 goto error_td_write;
 654         }
 655
 656         /*
 657          * Errors happened when opening traces, but we continue anyway.
 658          * sleep to let user see the stderr output before stdout.
 659          */
 660         if (partial_error)
 661                 sleep(PARTIAL_ERROR_SLEEP);
 662
 663         ret = convert_trace(td_write, ctx);
 664         if (ret) {
 665                 fprintf(stderr, "Error printing trace.\n\n");
 666                 goto error_copy_trace;
 667         }
 668
 669         fmt_write->close_trace(td_write);
 670
 671         bt_context_put(ctx);
 672         printf_verbose("finished converting. Output written to:\n%s\n",
 673                         opt_output_path ? : "<stdout>");
 674         goto end;
 675
 676         /* Error handling */
 677 error_copy_trace:
 678         fmt_write->close_trace(td_write);
 679 error_td_write:
 680         bt_context_put(ctx);
 681 error_td_read:
 682         partial_error = 1;
 683
 684         /* teardown and exit */
 685 end:
 686         free(opt_input_format);
 687         free(opt_output_format);
 688         free(opt_output_path);
 689         g_ptr_array_free(opt_input_paths, TRUE);
 690         if (partial_error)
 691                 exit(EXIT_FAILURE);
 692         else
 693                 exit(EXIT_SUCCESS);
 694 }