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