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