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