src/hwdb/hwdb.c

   1 /***
   2   This file is part of systemd.
   3
   4   Copyright 2012 Kay Sievers <kay@vrfy.org>
   5
   6   systemd is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU Lesser General Public License as published by
   8   the Free Software Foundation; either version 2.1 of the License, or
   9   (at your option) any later version.
  10
  11   systemd is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   Lesser General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  18 ***/
  19
  20 #include <ctype.h>
  21 #include <getopt.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24
  25 #include "alloc-util.h"
  26 #include "conf-files.h"
  27 #include "fd-util.h"
  28 #include "fileio.h"
  29 #include "fs-util.h"
  30 #include "hwdb-internal.h"
  31 #include "hwdb-util.h"
  32 #include "mkdir.h"
  33 #include "strbuf.h"
  34 #include "string-util.h"
  35 #include "strv.h"
  36 #include "util.h"
  37 #include "verbs.h"
  38
  39 /*
  40  * Generic udev properties, key/value database based on modalias strings.
  41  * Uses a Patricia/radix trie to index all matches for efficient lookup.
  42  */
  43
  44 static const char *arg_hwdb_bin_dir = "/etc/udev";
  45 static const char *arg_root = "";
  46
  47 static const char * const conf_file_dirs[] = {
  48         "/etc/udev/hwdb.d",
  49         UDEVLIBEXECDIR "/hwdb.d",
  50         NULL
  51 };
  52
  53 /* in-memory trie objects */
  54 struct trie {
  55         struct trie_node *root;
  56         struct strbuf *strings;
  57
  58         size_t nodes_count;
  59         size_t children_count;
  60         size_t values_count;
  61 };
  62
  63 struct trie_node {
  64         /* prefix, common part for all children of this node */
  65         size_t prefix_off;
  66
  67         /* sorted array of pointers to children nodes */
  68         struct trie_child_entry *children;
  69         uint8_t children_count;
  70
  71         /* sorted array of key/value pairs */
  72         struct trie_value_entry *values;
  73         size_t values_count;
  74 };
  75
  76 /* children array item with char (0-255) index */
  77 struct trie_child_entry {
  78         uint8_t c;
  79         struct trie_node *child;
  80 };
  81
  82 /* value array item with key/value pairs */
  83 struct trie_value_entry {
  84         size_t key_off;
  85         size_t value_off;
  86 };
  87
  88 static int trie_children_cmp(const void *v1, const void *v2) {
  89         const struct trie_child_entry *n1 = v1;
  90         const struct trie_child_entry *n2 = v2;
  91
  92         return n1->c - n2->c;
  93 }
  94
  95 static int node_add_child(struct trie *trie, struct trie_node *node, struct trie_node *node_child, uint8_t c) {
  96         struct trie_child_entry *child;
  97
  98         /* extend array, add new entry, sort for bisection */
  99         child = realloc(node->children, (node->children_count + 1) * sizeof(struct trie_child_entry));
 100         if (!child)
 101                 return -ENOMEM;
 102
 103         node->children = child;
 104         trie->children_count++;
 105         node->children[node->children_count].c = c;
 106         node->children[node->children_count].child = node_child;
 107         node->children_count++;
 108         qsort(node->children, node->children_count, sizeof(struct trie_child_entry), trie_children_cmp);
 109         trie->nodes_count++;
 110
 111         return 0;
 112 }
 113
 114 static struct trie_node *node_lookup(const struct trie_node *node, uint8_t c) {
 115         struct trie_child_entry *child;
 116         struct trie_child_entry search;
 117
 118         search.c = c;
 119         child = bsearch(&search, node->children, node->children_count, sizeof(struct trie_child_entry), trie_children_cmp);
 120         if (child)
 121                 return child->child;
 122         return NULL;
 123 }
 124
 125 static void trie_node_cleanup(struct trie_node *node) {
 126         size_t i;
 127
 128         for (i = 0; i < node->children_count; i++)
 129                 trie_node_cleanup(node->children[i].child);
 130         free(node->children);
 131         free(node->values);
 132         free(node);
 133 }
 134
 135 static void trie_free(struct trie *trie) {
 136         if (!trie)
 137                 return;
 138
 139         if (trie->root)
 140                 trie_node_cleanup(trie->root);
 141
 142         strbuf_cleanup(trie->strings);
 143         free(trie);
 144 }
 145
 146 DEFINE_TRIVIAL_CLEANUP_FUNC(struct trie*, trie_free);
 147
 148 static int trie_values_cmp(const void *v1, const void *v2, void *arg) {
 149         const struct trie_value_entry *val1 = v1;
 150         const struct trie_value_entry *val2 = v2;
 151         struct trie *trie = arg;
 152
 153         return strcmp(trie->strings->buf + val1->key_off,
 154                       trie->strings->buf + val2->key_off);
 155 }
 156
 157 static int trie_node_add_value(struct trie *trie, struct trie_node *node,
 158                           const char *key, const char *value) {
 159         ssize_t k, v;
 160         struct trie_value_entry *val;
 161
 162         k = strbuf_add_string(trie->strings, key, strlen(key));
 163         if (k < 0)
 164                 return k;
 165         v = strbuf_add_string(trie->strings, value, strlen(value));
 166         if (v < 0)
 167                 return v;
 168
 169         if (node->values_count) {
 170                 struct trie_value_entry search = {
 171                         .key_off = k,
 172                         .value_off = v,
 173                 };
 174
 175                 val = xbsearch_r(&search, node->values, node->values_count, sizeof(struct trie_value_entry), trie_values_cmp, trie);
 176                 if (val) {
 177                         /* replace existing earlier key with new value */
 178                         val->value_off = v;
 179                         return 0;
 180                 }
 181         }
 182
 183         /* extend array, add new entry, sort for bisection */
 184         val = realloc(node->values, (node->values_count + 1) * sizeof(struct trie_value_entry));
 185         if (!val)
 186                 return -ENOMEM;
 187         trie->values_count++;
 188         node->values = val;
 189         node->values[node->values_count].key_off = k;
 190         node->values[node->values_count].value_off = v;
 191         node->values_count++;
 192         qsort_r(node->values, node->values_count, sizeof(struct trie_value_entry), trie_values_cmp, trie);
 193         return 0;
 194 }
 195
 196 static int trie_insert(struct trie *trie, struct trie_node *node, const char *search,
 197                        const char *key, const char *value) {
 198         size_t i = 0;
 199         int err = 0;
 200
 201         for (;;) {
 202                 size_t p;
 203                 uint8_t c;
 204                 struct trie_node *child;
 205
 206                 for (p = 0; (c = trie->strings->buf[node->prefix_off + p]); p++) {
 207                         _cleanup_free_ char *s = NULL;
 208                         ssize_t off;
 209                         _cleanup_free_ struct trie_node *new_child = NULL;
 210
 211                         if (c == search[i + p])
 212                                 continue;
 213
 214                         /* split node */
 215                         new_child = new0(struct trie_node, 1);
 216                         if (!new_child)
 217                                 return -ENOMEM;
 218
 219                         /* move values from parent to child */
 220                         new_child->prefix_off = node->prefix_off + p+1;
 221                         new_child->children = node->children;
 222                         new_child->children_count = node->children_count;
 223                         new_child->values = node->values;
 224                         new_child->values_count = node->values_count;
 225
 226                         /* update parent; use strdup() because the source gets realloc()d */
 227                         s = strndup(trie->strings->buf + node->prefix_off, p);
 228                         if (!s)
 229                                 return -ENOMEM;
 230
 231                         off = strbuf_add_string(trie->strings, s, p);
 232                         if (off < 0)
 233                                 return off;
 234
 235                         node->prefix_off = off;
 236                         node->children = NULL;
 237                         node->children_count = 0;
 238                         node->values = NULL;
 239                         node->values_count = 0;
 240                         err = node_add_child(trie, node, new_child, c);
 241                         if (err < 0)
 242                                 return err;
 243
 244                         new_child = NULL; /* avoid cleanup */
 245                         break;
 246                 }
 247                 i += p;
 248
 249                 c = search[i];
 250                 if (c == '\0')
 251                         return trie_node_add_value(trie, node, key, value);
 252
 253                 child = node_lookup(node, c);
 254                 if (!child) {
 255                         ssize_t off;
 256
 257                         /* new child */
 258                         child = new0(struct trie_node, 1);
 259                         if (!child)
 260                                 return -ENOMEM;
 261
 262                         off = strbuf_add_string(trie->strings, search + i+1, strlen(search + i+1));
 263                         if (off < 0) {
 264                                 free(child);
 265                                 return off;
 266                         }
 267
 268                         child->prefix_off = off;
 269                         err = node_add_child(trie, node, child, c);
 270                         if (err < 0) {
 271                                 free(child);
 272                                 return err;
 273                         }
 274
 275                         return trie_node_add_value(trie, child, key, value);
 276                 }
 277
 278                 node = child;
 279                 i++;
 280         }
 281 }
 282
 283 struct trie_f {
 284         FILE *f;
 285         struct trie *trie;
 286         uint64_t strings_off;
 287
 288         uint64_t nodes_count;
 289         uint64_t children_count;
 290         uint64_t values_count;
 291 };
 292
 293 /* calculate the storage space for the nodes, children arrays, value arrays */
 294 static void trie_store_nodes_size(struct trie_f *trie, struct trie_node *node) {
 295         uint64_t i;
 296
 297         for (i = 0; i < node->children_count; i++)
 298                 trie_store_nodes_size(trie, node->children[i].child);
 299
 300         trie->strings_off += sizeof(struct trie_node_f);
 301         for (i = 0; i < node->children_count; i++)
 302                 trie->strings_off += sizeof(struct trie_child_entry_f);
 303         for (i = 0; i < node->values_count; i++)
 304                 trie->strings_off += sizeof(struct trie_value_entry_f);
 305 }
 306
 307 static int64_t trie_store_nodes(struct trie_f *trie, struct trie_node *node) {
 308         uint64_t i;
 309         struct trie_node_f n = {
 310                 .prefix_off = htole64(trie->strings_off + node->prefix_off),
 311                 .children_count = node->children_count,
 312                 .values_count = htole64(node->values_count),
 313         };
 314         struct trie_child_entry_f *children = NULL;
 315         int64_t node_off;
 316
 317         if (node->children_count) {
 318                 children = new0(struct trie_child_entry_f, node->children_count);
 319                 if (!children)
 320                         return -ENOMEM;
 321         }
 322
 323         /* post-order recursion */
 324         for (i = 0; i < node->children_count; i++) {
 325                 int64_t child_off;
 326
 327                 child_off = trie_store_nodes(trie, node->children[i].child);
 328                 if (child_off < 0) {
 329                         free(children);
 330                         return child_off;
 331                 }
 332                 children[i].c = node->children[i].c;
 333                 children[i].child_off = htole64(child_off);
 334         }
 335
 336         /* write node */
 337         node_off = ftello(trie->f);
 338         fwrite(&n, sizeof(struct trie_node_f), 1, trie->f);
 339         trie->nodes_count++;
 340
 341         /* append children array */
 342         if (node->children_count) {
 343                 fwrite(children, sizeof(struct trie_child_entry_f), node->children_count, trie->f);
 344                 trie->children_count += node->children_count;
 345                 free(children);
 346         }
 347
 348         /* append values array */
 349         for (i = 0; i < node->values_count; i++) {
 350                 struct trie_value_entry_f v = {
 351                         .key_off = htole64(trie->strings_off + node->values[i].key_off),
 352                         .value_off = htole64(trie->strings_off + node->values[i].value_off),
 353                 };
 354
 355                 fwrite(&v, sizeof(struct trie_value_entry_f), 1, trie->f);
 356                 trie->values_count++;
 357         }
 358
 359         return node_off;
 360 }
 361
 362 static int trie_store(struct trie *trie, const char *filename) {
 363         struct trie_f t = {
 364                 .trie = trie,
 365         };
 366         _cleanup_free_ char *filename_tmp = NULL;
 367         int64_t pos;
 368         int64_t root_off;
 369         int64_t size;
 370         struct trie_header_f h = {
 371                 .signature = HWDB_SIG,
 372                 .tool_version = htole64(atoi(VERSION)),
 373                 .header_size = htole64(sizeof(struct trie_header_f)),
 374                 .node_size = htole64(sizeof(struct trie_node_f)),
 375                 .child_entry_size = htole64(sizeof(struct trie_child_entry_f)),
 376                 .value_entry_size = htole64(sizeof(struct trie_value_entry_f)),
 377         };
 378         int err;
 379
 380         /* calculate size of header, nodes, children entries, value entries */
 381         t.strings_off = sizeof(struct trie_header_f);
 382         trie_store_nodes_size(&t, trie->root);
 383
 384         err = fopen_temporary(filename , &t.f, &filename_tmp);
 385         if (err < 0)
 386                 return err;
 387         fchmod(fileno(t.f), 0444);
 388
 389         /* write nodes */
 390         err = fseeko(t.f, sizeof(struct trie_header_f), SEEK_SET);
 391         if (err < 0) {
 392                 fclose(t.f);
 393                 unlink_noerrno(filename_tmp);
 394                 return -errno;
 395         }
 396         root_off = trie_store_nodes(&t, trie->root);
 397         h.nodes_root_off = htole64(root_off);
 398         pos = ftello(t.f);
 399         h.nodes_len = htole64(pos - sizeof(struct trie_header_f));
 400
 401         /* write string buffer */
 402         fwrite(trie->strings->buf, trie->strings->len, 1, t.f);
 403         h.strings_len = htole64(trie->strings->len);
 404
 405         /* write header */
 406         size = ftello(t.f);
 407         h.file_size = htole64(size);
 408         err = fseeko(t.f, 0, SEEK_SET);
 409         if (err < 0) {
 410                 fclose(t.f);
 411                 unlink_noerrno(filename_tmp);
 412                 return -errno;
 413         }
 414         fwrite(&h, sizeof(struct trie_header_f), 1, t.f);
 415         err = ferror(t.f);
 416         if (err)
 417                 err = -errno;
 418         fclose(t.f);
 419         if (err < 0 || rename(filename_tmp, filename) < 0) {
 420                 unlink_noerrno(filename_tmp);
 421                 return err < 0 ? err : -errno;
 422         }
 423
 424         log_debug("=== trie on-disk ===");
 425         log_debug("size:             %8"PRIi64" bytes", size);
 426         log_debug("header:           %8zu bytes", sizeof(struct trie_header_f));
 427         log_debug("nodes:            %8"PRIu64" bytes (%8"PRIu64")",
 428                   t.nodes_count * sizeof(struct trie_node_f), t.nodes_count);
 429         log_debug("child pointers:   %8"PRIu64" bytes (%8"PRIu64")",
 430                   t.children_count * sizeof(struct trie_child_entry_f), t.children_count);
 431         log_debug("value pointers:   %8"PRIu64" bytes (%8"PRIu64")",
 432                   t.values_count * sizeof(struct trie_value_entry_f), t.values_count);
 433         log_debug("string store:     %8zu bytes", trie->strings->len);
 434         log_debug("strings start:    %8"PRIu64, t.strings_off);
 435
 436         return 0;
 437 }
 438
 439 static int insert_data(struct trie *trie, char **match_list, char *line, const char *filename) {
 440         char *value, **entry;
 441
 442         value = strchr(line, '=');
 443         if (!value) {
 444                 log_error("Error, key/value pair expected but got '%s' in '%s':", line, filename);
 445                 return -EINVAL;
 446         }
 447
 448         value[0] = '\0';
 449         value++;
 450
 451         /* libudev requires properties to start with a space */
 452         while (isblank(line[0]) && isblank(line[1]))
 453                 line++;
 454
 455         if (line[0] == '\0' || value[0] == '\0') {
 456                 log_error("Error, empty key or value '%s' in '%s':", line, filename);
 457                 return -EINVAL;
 458         }
 459
 460         STRV_FOREACH(entry, match_list)
 461                 trie_insert(trie, trie->root, *entry, line, value);
 462
 463         return 0;
 464 }
 465
 466 static int import_file(struct trie *trie, const char *filename) {
 467         enum {
 468                 HW_NONE,
 469                 HW_MATCH,
 470                 HW_DATA,
 471         } state = HW_NONE;
 472         _cleanup_fclose_ FILE *f = NULL;
 473         char line[LINE_MAX];
 474         _cleanup_strv_free_ char **match_list = NULL;
 475         char *match = NULL;
 476         int r;
 477
 478         f = fopen(filename, "re");
 479         if (!f)
 480                 return -errno;
 481
 482         while (fgets(line, sizeof(line), f)) {
 483                 size_t len;
 484                 char *pos;
 485
 486                 /* comment line */
 487                 if (line[0] == '#')
 488                         continue;
 489
 490                 /* strip trailing comment */
 491                 pos = strchr(line, '#');
 492                 if (pos)
 493                         pos[0] = '\0';
 494
 495                 /* strip trailing whitespace */
 496                 len = strlen(line);
 497                 while (len > 0 && isspace(line[len-1]))
 498                         len--;
 499                 line[len] = '\0';
 500
 501                 switch (state) {
 502                 case HW_NONE:
 503                         if (len == 0)
 504                                 break;
 505
 506                         if (line[0] == ' ') {
 507                                 log_error("Error, MATCH expected but got '%s' in '%s':", line, filename);
 508                                 break;
 509                         }
 510
 511                         /* start of record, first match */
 512                         state = HW_MATCH;
 513
 514                         match = strdup(line);
 515                         if (!match)
 516                                 return -ENOMEM;
 517
 518                         r = strv_consume(&match_list, match);
 519                         if (r < 0)
 520                                 return r;
 521
 522                         break;
 523
 524                 case HW_MATCH:
 525                         if (len == 0) {
 526                                 log_error("Error, DATA expected but got empty line in '%s':", filename);
 527                                 state = HW_NONE;
 528                                 strv_clear(match_list);
 529                                 break;
 530                         }
 531
 532                         /* another match */
 533                         if (line[0] != ' ') {
 534                                 match = strdup(line);
 535                                 if (!match)
 536                                         return -ENOMEM;
 537
 538                                 r = strv_consume(&match_list, match);
 539                                 if (r < 0)
 540                                         return r;
 541
 542                                 break;
 543                         }
 544
 545                         /* first data */
 546                         state = HW_DATA;
 547                         insert_data(trie, match_list, line, filename);
 548                         break;
 549
 550                 case HW_DATA:
 551                         /* end of record */
 552                         if (len == 0) {
 553                                 state = HW_NONE;
 554                                 strv_clear(match_list);
 555                                 break;
 556                         }
 557
 558                         if (line[0] != ' ') {
 559                                 log_error("Error, DATA expected but got '%s' in '%s':", line, filename);
 560                                 state = HW_NONE;
 561                                 strv_clear(match_list);
 562                                 break;
 563                         }
 564
 565                         insert_data(trie, match_list, line, filename);
 566                         break;
 567                 };
 568         }
 569
 570         return 0;
 571 }
 572
 573 static int hwdb_query(int argc, char *argv[], void *userdata) {
 574         _cleanup_(sd_hwdb_unrefp) sd_hwdb *hwdb = NULL;
 575         const char *key, *value;
 576         const char *modalias;
 577         int r;
 578
 579         assert(argc >= 2);
 580         assert(argv);
 581
 582         modalias = argv[1];
 583
 584         r = sd_hwdb_new(&hwdb);
 585         if (r < 0)
 586                 return r;
 587
 588         SD_HWDB_FOREACH_PROPERTY(hwdb, modalias, key, value)
 589                 printf("%s=%s\n", key, value);
 590
 591         return 0;
 592 }
 593
 594 static int hwdb_update(int argc, char *argv[], void *userdata) {
 595         _cleanup_free_ char *hwdb_bin = NULL;
 596         _cleanup_(trie_freep) struct trie *trie = NULL;
 597         char **files, **f;
 598         int r;
 599
 600         trie = new0(struct trie, 1);
 601         if (!trie)
 602                 return -ENOMEM;
 603
 604         /* string store */
 605         trie->strings = strbuf_new();
 606         if (!trie->strings)
 607                 return -ENOMEM;
 608
 609         /* index */
 610         trie->root = new0(struct trie_node, 1);
 611         if (!trie->root)
 612                 return -ENOMEM;
 613
 614         trie->nodes_count++;
 615
 616         r = conf_files_list_strv(&files, ".hwdb", arg_root, conf_file_dirs);
 617         if (r < 0)
 618                 return log_error_errno(r, "failed to enumerate hwdb files: %m");
 619
 620         STRV_FOREACH(f, files) {
 621                 log_debug("reading file '%s'", *f);
 622                 import_file(trie, *f);
 623         }
 624         strv_free(files);
 625
 626         strbuf_complete(trie->strings);
 627
 628         log_debug("=== trie in-memory ===");
 629         log_debug("nodes:            %8zu bytes (%8zu)",
 630                   trie->nodes_count * sizeof(struct trie_node), trie->nodes_count);
 631         log_debug("children arrays:  %8zu bytes (%8zu)",
 632                   trie->children_count * sizeof(struct trie_child_entry), trie->children_count);
 633         log_debug("values arrays:    %8zu bytes (%8zu)",
 634                   trie->values_count * sizeof(struct trie_value_entry), trie->values_count);
 635         log_debug("strings:          %8zu bytes",
 636                   trie->strings->len);
 637         log_debug("strings incoming: %8zu bytes (%8zu)",
 638                   trie->strings->in_len, trie->strings->in_count);
 639         log_debug("strings dedup'ed: %8zu bytes (%8zu)",
 640                   trie->strings->dedup_len, trie->strings->dedup_count);
 641
 642         hwdb_bin = strjoin(arg_root, "/", arg_hwdb_bin_dir, "/hwdb.bin", NULL);
 643         if (!hwdb_bin)
 644                 return -ENOMEM;
 645
 646         mkdir_parents(hwdb_bin, 0755);
 647         r = trie_store(trie, hwdb_bin);
 648         if (r < 0)
 649                 return log_error_errno(r, "Failure writing database %s: %m", hwdb_bin);
 650
 651         return 0;
 652 }
 653
 654 static void help(void) {
 655         printf("Usage: %s OPTIONS COMMAND\n\n"
 656                "Update or query the hardware database.\n\n"
 657                "  -h --help            Show this help\n"
 658                "     --version         Show package version\n"
 659                "     --usr             Generate in " UDEVLIBEXECDIR " instead of /etc/udev\n"
 660                "  -r --root=PATH       Alternative root path in the filesystem\n\n"
 661                "Commands:\n"
 662                "  update               Update the hwdb database\n"
 663                "  query MODALIAS       Query database and print result\n",
 664                program_invocation_short_name);
 665 }
 666
 667 static int parse_argv(int argc, char *argv[]) {
 668         enum {
 669                 ARG_VERSION = 0x100,
 670                 ARG_USR,
 671         };
 672
 673         static const struct option options[] = {
 674                 { "help",     no_argument,       NULL, 'h'         },
 675                 { "version",  no_argument,       NULL, ARG_VERSION },
 676                 { "usr",      no_argument,       NULL, ARG_USR     },
 677                 { "root",     required_argument, NULL, 'r'         },
 678                 {}
 679         };
 680
 681         int c;
 682
 683         assert(argc >= 0);
 684         assert(argv);
 685
 686         while ((c = getopt_long(argc, argv, "ut:r:h", options, NULL)) >= 0) {
 687                 switch(c) {
 688
 689                 case 'h':
 690                         help();
 691                         return 0;
 692
 693                 case ARG_VERSION:
 694                         return version();
 695
 696                 case ARG_USR:
 697                         arg_hwdb_bin_dir = UDEVLIBEXECDIR;
 698                         break;
 699
 700                 case 'r':
 701                         arg_root = optarg;
 702                         break;
 703
 704                 case '?':
 705                         return -EINVAL;
 706
 707                 default:
 708                         assert_not_reached("Unknown option");
 709                 }
 710         }
 711
 712         return 1;
 713 }
 714
 715 static int hwdb_main(int argc, char *argv[]) {
 716         const Verb verbs[] = {
 717                 { "update", 1, 1, 0, hwdb_update },
 718                 { "query",  2, 2, 0, hwdb_query  },
 719                 {},
 720         };
 721
 722         return dispatch_verb(argc, argv, verbs, NULL);
 723 }
 724
 725 int main (int argc, char *argv[]) {
 726         int r;
 727
 728         log_parse_environment();
 729         log_open();
 730
 731         r = parse_argv(argc, argv);
 732         if (r <= 0)
 733                 goto finish;
 734
 735         r = hwdb_main(argc, argv);
 736
 737 finish:
 738         return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
 739 }