udev/udevadm-trigger.c

   1 /*
   2  * Copyright (C) 2004-2006 Kay Sievers <kay@vrfy.org>
   3  * Copyright (C) 2006 Hannes Reinecke <hare@suse.de>
   4  *
   5  *      This program is free software; you can redistribute it and/or modify it
   6  *      under the terms of the GNU General Public License as published by the
   7  *      Free Software Foundation version 2 of the License.
   8  *
   9  *      This program is distributed in the hope that it will be useful, but
  10  *      WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  *      General Public License for more details.
  13  *
  14  *      You should have received a copy of the GNU General Public License along
  15  *      with this program; if not, write to the Free Software Foundation, Inc.,
  16  *      51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  17  *
  18  */
  19
  20 #include <stdlib.h>
  21 #include <stddef.h>
  22 #include <string.h>
  23 #include <stdio.h>
  24 #include <unistd.h>
  25 #include <getopt.h>
  26 #include <errno.h>
  27 #include <dirent.h>
  28 #include <fcntl.h>
  29 #include <syslog.h>
  30 #include <fnmatch.h>
  31 #include <sys/stat.h>
  32 #include <sys/types.h>
  33 #include <sys/socket.h>
  34 #include <sys/un.h>
  35
  36 #include "udev.h"
  37 #include "udev_rules.h"
  38
  39 static int verbose;
  40 static int dry_run;
  41 LIST_HEAD(device_list);
  42 LIST_HEAD(filter_subsystem_match_list);
  43 LIST_HEAD(filter_subsystem_nomatch_list);
  44 LIST_HEAD(filter_attr_match_list);
  45 LIST_HEAD(filter_attr_nomatch_list);
  46 static int sock = -1;
  47 static struct sockaddr_un saddr;
  48 static socklen_t saddrlen;
  49
  50 /* devices that should run last cause of their dependencies */
  51 static int delay_device(const char *devpath)
  52 {
  53         static const char *delay_device_list[] = {
  54                 "*/md*",
  55                 "*/dm-*",
  56                 NULL
  57         };
  58         int i;
  59
  60         for (i = 0; delay_device_list[i] != NULL; i++)
  61                 if (fnmatch(delay_device_list[i], devpath, 0) == 0)
  62                         return 1;
  63         return 0;
  64 }
  65
  66 static int device_list_insert(struct udev *udev, const char *path)
  67 {
  68         char filename[PATH_SIZE];
  69         char devpath[PATH_SIZE];
  70         struct stat statbuf;
  71
  72         dbg(udev, "add '%s'\n" , path);
  73
  74         /* we only have a device, if we have an uevent file */
  75         strlcpy(filename, path, sizeof(filename));
  76         strlcat(filename, "/uevent", sizeof(filename));
  77         if (stat(filename, &statbuf) < 0)
  78                 return -1;
  79         if (!(statbuf.st_mode & S_IWUSR))
  80                 return -1;
  81
  82         strlcpy(devpath, &path[strlen(udev_get_sys_path(udev))], sizeof(devpath));
  83
  84         /* resolve possible link to real target */
  85         if (lstat(path, &statbuf) < 0)
  86                 return -1;
  87         if (S_ISLNK(statbuf.st_mode))
  88                 if (sysfs_resolve_link(udev, devpath, sizeof(devpath)) != 0)
  89                         return -1;
  90
  91         name_list_add(udev, &device_list, devpath, 1);
  92         return 0;
  93 }
  94
  95 static void trigger_uevent(struct udev *udev, const char *devpath, const char *action)
  96 {
  97         char filename[PATH_SIZE];
  98         int fd;
  99
 100         strlcpy(filename, udev_get_sys_path(udev), sizeof(filename));
 101         strlcat(filename, devpath, sizeof(filename));
 102         strlcat(filename, "/uevent", sizeof(filename));
 103
 104         if (verbose)
 105                 printf("%s\n", devpath);
 106
 107         if (dry_run)
 108                 return;
 109
 110         fd = open(filename, O_WRONLY);
 111         if (fd < 0) {
 112                 dbg(udev, "error on opening %s: %s\n", filename, strerror(errno));
 113                 return;
 114         }
 115
 116         if (write(fd, action, strlen(action)) < 0)
 117                 info(udev, "error writing '%s' to '%s': %s\n", action, filename, strerror(errno));
 118
 119         close(fd);
 120 }
 121
 122 static int pass_to_socket(struct udev *udev, const char *devpath, const char *action, const char *env)
 123 {
 124         struct udevice *udevice;
 125         struct name_entry *name_loop;
 126         char buf[4096];
 127         size_t bufpos = 0;
 128         ssize_t count;
 129         char path[PATH_SIZE];
 130         int fd;
 131         char link_target[PATH_SIZE];
 132         int len;
 133         int err = 0;
 134
 135         if (verbose)
 136                 printf("%s\n", devpath);
 137
 138         udevice = udev_device_init(udev);
 139         if (udevice == NULL)
 140                 return -1;
 141         udev_db_get_device(udevice, devpath);
 142
 143         /* add header */
 144         bufpos = snprintf(buf, sizeof(buf)-1, "%s@%s", action, devpath);
 145         bufpos++;
 146
 147         /* add cookie */
 148         if (env != NULL) {
 149                 bufpos += snprintf(&buf[bufpos], sizeof(buf)-1, "%s", env);
 150                 bufpos++;
 151         }
 152
 153         /* add standard keys */
 154         bufpos += snprintf(&buf[bufpos], sizeof(buf)-1, "DEVPATH=%s", devpath);
 155         bufpos++;
 156         bufpos += snprintf(&buf[bufpos], sizeof(buf)-1, "ACTION=%s", action);
 157         bufpos++;
 158
 159         /* add subsystem */
 160         strlcpy(path, udev_get_sys_path(udev), sizeof(path));
 161         strlcat(path, devpath, sizeof(path));
 162         strlcat(path, "/subsystem", sizeof(path));
 163         len = readlink(path, link_target, sizeof(link_target));
 164         if (len > 0) {
 165                 char *pos;
 166
 167                 link_target[len] = '\0';
 168                 pos = strrchr(link_target, '/');
 169                 if (pos != NULL) {
 170                         bufpos += snprintf(&buf[bufpos], sizeof(buf)-1, "SUBSYSTEM=%s", &pos[1]);
 171                         bufpos++;
 172                 }
 173         }
 174
 175         /* add symlinks and node name */
 176         path[0] = '\0';
 177         list_for_each_entry(name_loop, &udevice->symlink_list, node) {
 178                 strlcat(path, udev_get_dev_path(udev), sizeof(path));
 179                 strlcat(path, "/", sizeof(path));
 180                 strlcat(path, name_loop->name, sizeof(path));
 181                 strlcat(path, " ", sizeof(path));
 182         }
 183         remove_trailing_chars(path, ' ');
 184         if (path[0] != '\0') {
 185                 bufpos += snprintf(&buf[bufpos], sizeof(buf)-1, "DEVLINKS=%s", path);
 186                 bufpos++;
 187         }
 188         if (udevice->name[0] != '\0') {
 189                 strlcpy(path, udev_get_dev_path(udev), sizeof(path));
 190                 strlcat(path, "/", sizeof(path));
 191                 strlcat(path, udevice->name, sizeof(path));
 192                 bufpos += snprintf(&buf[bufpos], sizeof(buf)-1, "DEVNAME=%s", path);
 193                 bufpos++;
 194         }
 195
 196         /* add keys from device "uevent" file */
 197         strlcpy(path, udev_get_sys_path(udev), sizeof(path));
 198         strlcat(path, devpath, sizeof(path));
 199         strlcat(path, "/uevent", sizeof(path));
 200         fd = open(path, O_RDONLY);
 201         if (fd >= 0) {
 202                 char value[4096];
 203
 204                 count = read(fd, value, sizeof(value));
 205                 close(fd);
 206                 if (count > 0) {
 207                         char *key;
 208
 209                         value[count] = '\0';
 210                         key = value;
 211                         while (key[0] != '\0') {
 212                                 char *next;
 213
 214                                 next = strchr(key, '\n');
 215                                 if (next == NULL)
 216                                         break;
 217                                 next[0] = '\0';
 218                                 bufpos += strlcpy(&buf[bufpos], key, sizeof(buf) - bufpos-1);
 219                                 bufpos++;
 220                                 key = &next[1];
 221                         }
 222                 }
 223         }
 224
 225         /* add keys from database */
 226         list_for_each_entry(name_loop, &udevice->env_list, node) {
 227                 bufpos += strlcpy(&buf[bufpos], name_loop->name, sizeof(buf) - bufpos-1);
 228                 bufpos++;
 229         }
 230         if (bufpos > sizeof(buf))
 231                 bufpos = sizeof(buf);
 232
 233         count = sendto(sock, &buf, bufpos, 0, (struct sockaddr *)&saddr, saddrlen);
 234         if (count < 0)
 235                 err = -1;
 236
 237         return err;
 238 }
 239
 240 static void exec_list(struct udev *udev, const char *action, const char *env)
 241 {
 242         struct name_entry *loop_device;
 243         struct name_entry *tmp_device;
 244
 245         list_for_each_entry_safe(loop_device, tmp_device, &device_list, node) {
 246                 if (delay_device(loop_device->name))
 247                         continue;
 248                 if (sock >= 0)
 249                         pass_to_socket(udev, loop_device->name, action, env);
 250                 else
 251                         trigger_uevent(udev, loop_device->name, action);
 252                 list_del(&loop_device->node);
 253                 free(loop_device);
 254         }
 255
 256         /* trigger remaining delayed devices */
 257         list_for_each_entry_safe(loop_device, tmp_device, &device_list, node) {
 258                 if (sock >= 0)
 259                         pass_to_socket(udev, loop_device->name, action, env);
 260                 else
 261                         trigger_uevent(udev, loop_device->name, action);
 262                 list_del(&loop_device->node);
 263                 free(loop_device);
 264         }
 265 }
 266
 267 static int subsystem_filtered(const char *subsystem)
 268 {
 269         struct name_entry *loop_name;
 270
 271         /* skip devices matching the listed subsystems */
 272         list_for_each_entry(loop_name, &filter_subsystem_nomatch_list, node)
 273                 if (fnmatch(loop_name->name, subsystem, 0) == 0)
 274                         return 1;
 275
 276         /* skip devices not matching the listed subsystems */
 277         if (!list_empty(&filter_subsystem_match_list)) {
 278                 list_for_each_entry(loop_name, &filter_subsystem_match_list, node)
 279                         if (fnmatch(loop_name->name, subsystem, 0) == 0)
 280                                 return 0;
 281                 return 1;
 282         }
 283
 284         return 0;
 285 }
 286
 287 static int attr_match(const char *path, const char *attr_value)
 288 {
 289         char attr[NAME_SIZE];
 290         char file[PATH_SIZE];
 291         char *match_value;
 292
 293         strlcpy(attr, attr_value, sizeof(attr));
 294
 295         /* separate attr and match value */
 296         match_value = strchr(attr, '=');
 297         if (match_value != NULL) {
 298                 match_value[0] = '\0';
 299                 match_value = &match_value[1];
 300         }
 301
 302         strlcpy(file, path, sizeof(file));
 303         strlcat(file, "/", sizeof(file));
 304         strlcat(file, attr, sizeof(file));
 305
 306         if (match_value != NULL) {
 307                 /* match file content */
 308                 char value[NAME_SIZE];
 309                 int fd;
 310                 ssize_t size;
 311
 312                 fd = open(file, O_RDONLY);
 313                 if (fd < 0)
 314                         return 0;
 315                 size = read(fd, value, sizeof(value));
 316                 close(fd);
 317                 if (size < 0)
 318                         return 0;
 319                 value[size] = '\0';
 320                 remove_trailing_chars(value, '\n');
 321
 322                 /* match if attribute value matches */
 323                 if (fnmatch(match_value, value, 0) == 0)
 324                         return 1;
 325         } else {
 326                 /* match if attribute exists */
 327                 struct stat statbuf;
 328
 329                 if (stat(file, &statbuf) == 0)
 330                         return 1;
 331         }
 332         return 0;
 333 }
 334
 335 static int attr_filtered(const char *path)
 336 {
 337         struct name_entry *loop_name;
 338
 339         /* skip devices matching the listed sysfs attributes */
 340         list_for_each_entry(loop_name, &filter_attr_nomatch_list, node)
 341                 if (attr_match(path, loop_name->name))
 342                         return 1;
 343
 344         /* skip devices not matching the listed sysfs attributes */
 345         if (!list_empty(&filter_attr_match_list)) {
 346                 list_for_each_entry(loop_name, &filter_attr_match_list, node)
 347                         if (attr_match(path, loop_name->name))
 348                                 return 0;
 349                 return 1;
 350         }
 351         return 0;
 352 }
 353
 354 enum scan_type {
 355         SCAN_DEVICES,
 356         SCAN_SUBSYSTEM,
 357 };
 358
 359 static void scan_subsystem(struct udev *udev, const char *subsys, enum scan_type scan)
 360 {
 361         char base[PATH_SIZE];
 362         DIR *dir;
 363         struct dirent *dent;
 364         const char *subdir;
 365
 366         if (scan == SCAN_DEVICES)
 367                 subdir = "/devices";
 368         else if (scan == SCAN_SUBSYSTEM)
 369                 subdir = "/drivers";
 370         else
 371                 return;
 372
 373         strlcpy(base, udev_get_sys_path(udev), sizeof(base));
 374         strlcat(base, "/", sizeof(base));
 375         strlcat(base, subsys, sizeof(base));
 376
 377         dir = opendir(base);
 378         if (dir != NULL) {
 379                 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
 380                         char dirname[PATH_SIZE];
 381                         DIR *dir2;
 382                         struct dirent *dent2;
 383
 384                         if (dent->d_name[0] == '.')
 385                                 continue;
 386
 387                         if (scan == SCAN_DEVICES)
 388                                 if (subsystem_filtered(dent->d_name))
 389                                         continue;
 390
 391                         strlcpy(dirname, base, sizeof(dirname));
 392                         strlcat(dirname, "/", sizeof(dirname));
 393                         strlcat(dirname, dent->d_name, sizeof(dirname));
 394
 395                         if (scan == SCAN_SUBSYSTEM) {
 396                                 if (attr_filtered(dirname))
 397                                         continue;
 398                                 if (!subsystem_filtered("subsystem"))
 399                                         device_list_insert(udev, dirname);
 400                                 if (subsystem_filtered("drivers"))
 401                                         continue;
 402                         }
 403
 404                         strlcat(dirname, subdir, sizeof(dirname));
 405
 406                         /* look for devices/drivers */
 407                         dir2 = opendir(dirname);
 408                         if (dir2 != NULL) {
 409                                 for (dent2 = readdir(dir2); dent2 != NULL; dent2 = readdir(dir2)) {
 410                                         char dirname2[PATH_SIZE];
 411
 412                                         if (dent2->d_name[0] == '.')
 413                                                 continue;
 414
 415                                         strlcpy(dirname2, dirname, sizeof(dirname2));
 416                                         strlcat(dirname2, "/", sizeof(dirname2));
 417                                         strlcat(dirname2, dent2->d_name, sizeof(dirname2));
 418                                         if (attr_filtered(dirname2))
 419                                                 continue;
 420                                         device_list_insert(udev, dirname2);
 421                                 }
 422                                 closedir(dir2);
 423                         }
 424                 }
 425                 closedir(dir);
 426         }
 427 }
 428
 429 static void scan_block(struct udev *udev)
 430 {
 431         char base[PATH_SIZE];
 432         DIR *dir;
 433         struct dirent *dent;
 434
 435         if (subsystem_filtered("block"))
 436                 return;
 437
 438         strlcpy(base, udev_get_sys_path(udev), sizeof(base));
 439         strlcat(base, "/block", sizeof(base));
 440
 441         dir = opendir(base);
 442         if (dir != NULL) {
 443                 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
 444                         char dirname[PATH_SIZE];
 445                         DIR *dir2;
 446                         struct dirent *dent2;
 447
 448                         if (dent->d_name[0] == '.')
 449                                 continue;
 450
 451                         strlcpy(dirname, base, sizeof(dirname));
 452                         strlcat(dirname, "/", sizeof(dirname));
 453                         strlcat(dirname, dent->d_name, sizeof(dirname));
 454                         if (attr_filtered(dirname))
 455                                 continue;
 456                         if (device_list_insert(udev, dirname) != 0)
 457                                 continue;
 458
 459                         /* look for partitions */
 460                         dir2 = opendir(dirname);
 461                         if (dir2 != NULL) {
 462                                 for (dent2 = readdir(dir2); dent2 != NULL; dent2 = readdir(dir2)) {
 463                                         char dirname2[PATH_SIZE];
 464
 465                                         if (dent2->d_name[0] == '.')
 466                                                 continue;
 467
 468                                         if (!strcmp(dent2->d_name,"device"))
 469                                                 continue;
 470
 471                                         strlcpy(dirname2, dirname, sizeof(dirname2));
 472                                         strlcat(dirname2, "/", sizeof(dirname2));
 473                                         strlcat(dirname2, dent2->d_name, sizeof(dirname2));
 474                                         if (attr_filtered(dirname2))
 475                                                 continue;
 476                                         device_list_insert(udev, dirname2);
 477                                 }
 478                                 closedir(dir2);
 479                         }
 480                 }
 481                 closedir(dir);
 482         }
 483 }
 484
 485 static void scan_class(struct udev *udev)
 486 {
 487         char base[PATH_SIZE];
 488         DIR *dir;
 489         struct dirent *dent;
 490
 491         strlcpy(base, udev_get_sys_path(udev), sizeof(base));
 492         strlcat(base, "/class", sizeof(base));
 493
 494         dir = opendir(base);
 495         if (dir != NULL) {
 496                 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
 497                         char dirname[PATH_SIZE];
 498                         DIR *dir2;
 499                         struct dirent *dent2;
 500
 501                         if (dent->d_name[0] == '.')
 502                                 continue;
 503
 504                         if (subsystem_filtered(dent->d_name))
 505                                 continue;
 506
 507                         strlcpy(dirname, base, sizeof(dirname));
 508                         strlcat(dirname, "/", sizeof(dirname));
 509                         strlcat(dirname, dent->d_name, sizeof(dirname));
 510                         dir2 = opendir(dirname);
 511                         if (dir2 != NULL) {
 512                                 for (dent2 = readdir(dir2); dent2 != NULL; dent2 = readdir(dir2)) {
 513                                         char dirname2[PATH_SIZE];
 514
 515                                         if (dent2->d_name[0] == '.')
 516                                                 continue;
 517
 518                                         if (!strcmp(dent2->d_name, "device"))
 519                                                 continue;
 520
 521                                         strlcpy(dirname2, dirname, sizeof(dirname2));
 522                                         strlcat(dirname2, "/", sizeof(dirname2));
 523                                         strlcat(dirname2, dent2->d_name, sizeof(dirname2));
 524                                         if (attr_filtered(dirname2))
 525                                                 continue;
 526                                         device_list_insert(udev, dirname2);
 527                                 }
 528                                 closedir(dir2);
 529                         }
 530                 }
 531                 closedir(dir);
 532         }
 533 }
 534
 535 static void scan_failed(struct udev *udev)
 536 {
 537         char base[PATH_SIZE];
 538         DIR *dir;
 539         struct dirent *dent;
 540
 541         strlcpy(base, udev_get_dev_path(udev), sizeof(base));
 542         strlcat(base, "/.udev/failed", sizeof(base));
 543
 544         dir = opendir(base);
 545         if (dir != NULL) {
 546                 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
 547                         char device[PATH_SIZE];
 548                         size_t start;
 549
 550                         if (dent->d_name[0] == '.')
 551                                 continue;
 552
 553                         start = strlcpy(device, udev_get_sys_path(udev), sizeof(device));
 554                         if(start >= sizeof(device))
 555                                 start = sizeof(device) - 1;
 556                         strlcat(device, dent->d_name, sizeof(device));
 557                         path_decode(&device[start]);
 558                         device_list_insert(udev, device);
 559                 }
 560                 closedir(dir);
 561         }
 562 }
 563
 564 int udevadm_trigger(struct udev *udev, int argc, char *argv[])
 565 {
 566         int failed = 0;
 567         const char *sockpath = NULL;
 568         int option;
 569         const char *action = "add";
 570         const char *env = NULL;
 571         static const struct option options[] = {
 572                 { "verbose", 0, NULL, 'v' },
 573                 { "dry-run", 0, NULL, 'n' },
 574                 { "retry-failed", 0, NULL, 'F' },
 575                 { "socket", 1, NULL, 'o' },
 576                 { "help", 0, NULL, 'h' },
 577                 { "action", 1, NULL, 'c' },
 578                 { "subsystem-match", 1, NULL, 's' },
 579                 { "subsystem-nomatch", 1, NULL, 'S' },
 580                 { "attr-match", 1, NULL, 'a' },
 581                 { "attr-nomatch", 1, NULL, 'A' },
 582                 { "env", 1, NULL, 'e' },
 583                 {}
 584         };
 585
 586         dbg(udev, "version %s\n", VERSION);
 587
 588         while (1) {
 589                 option = getopt_long(argc, argv, "vnFo:hce::s:S:a:A:", options, NULL);
 590                 if (option == -1)
 591                         break;
 592
 593                 switch (option) {
 594                 case 'v':
 595                         verbose = 1;
 596                         break;
 597                 case 'n':
 598                         dry_run = 1;
 599                         break;
 600                 case 'F':
 601                         failed = 1;
 602                         break;
 603                 case 'o':
 604                         sockpath = optarg;
 605                         break;
 606                 case 'c':
 607                         action = optarg;
 608                         break;
 609                 case 'e':
 610                         if (strchr(optarg, '=') != NULL)
 611                                 env = optarg;
 612                         break;
 613                 case 's':
 614                         name_list_add(udev, &filter_subsystem_match_list, optarg, 0);
 615                         break;
 616                 case 'S':
 617                         name_list_add(udev, &filter_subsystem_nomatch_list, optarg, 0);
 618                         break;
 619                 case 'a':
 620                         name_list_add(udev, &filter_attr_match_list, optarg, 0);
 621                         break;
 622                 case 'A':
 623                         name_list_add(udev, &filter_attr_nomatch_list, optarg, 0);
 624                         break;
 625                 case 'h':
 626                         printf("Usage: udevadm trigger OPTIONS\n"
 627                                "  --verbose                       print the list of devices while running\n"
 628                                "  --dry-run                       do not actually trigger the events\n"
 629                                "  --retry-failed                  trigger only the events which have been\n"
 630                                "                                  marked as failed during a previous run\n"
 631                                "  --socket=<socket path>          pass events to socket instead of triggering kernel events\n"
 632                                "  --env=<KEY>=<value>             pass an additional key (works only with --socket=)\n"
 633                                "  --subsystem-match=<subsystem>   trigger devices from a matching subystem\n"
 634                                "  --subsystem-nomatch=<subsystem> exclude devices from a matching subystem\n"
 635                                "  --attr-match=<file[=<value>]>   trigger devices with a matching sysfs\n"
 636                                "                                  attribute\n"
 637                                "  --attr-nomatch=<file[=<value>]> exclude devices with a matching sysfs\n"
 638                                "                                  attribute\n"
 639                                "  --help                          print this text\n"
 640                                "\n");
 641                         goto exit;
 642                 default:
 643                         goto exit;
 644                 }
 645         }
 646
 647         if (sockpath != NULL) {
 648                 struct stat stats;
 649
 650                 sock = socket(AF_LOCAL, SOCK_DGRAM, 0);
 651                 memset(&saddr, 0x00, sizeof(struct sockaddr_un));
 652                 saddr.sun_family = AF_LOCAL;
 653                 if (sockpath[0] == '@') {
 654                         /* abstract namespace socket requested */
 655                         strlcpy(&saddr.sun_path[1], &sockpath[1], sizeof(saddr.sun_path)-1);
 656                         saddrlen = offsetof(struct sockaddr_un, sun_path) + 1 + strlen(&saddr.sun_path[1]);
 657                 } else if (stat(sockpath, &stats) == 0 && S_ISSOCK(stats.st_mode)) {
 658                         /* existing socket file */
 659                         strlcpy(saddr.sun_path, sockpath, sizeof(saddr.sun_path));
 660                         saddrlen = offsetof(struct sockaddr_un, sun_path) + strlen(saddr.sun_path);
 661                 } else {
 662                         /* no socket file, assume abstract namespace socket */
 663                         strlcpy(&saddr.sun_path[1], sockpath, sizeof(saddr.sun_path)-1);
 664                         saddrlen = offsetof(struct sockaddr_un, sun_path) + 1 + strlen(&saddr.sun_path[1]);
 665                 }
 666         } else if (env != NULL) {
 667                 fprintf(stderr, "error: --env= only valid with --socket= option\n");
 668                 goto exit;
 669         }
 670
 671         if (failed) {
 672                 scan_failed(udev);
 673                 exec_list(udev, action, env);
 674         } else {
 675                 char base[PATH_SIZE];
 676                 struct stat statbuf;
 677
 678                 /* if we have /sys/subsystem, forget all the old stuff */
 679                 strlcpy(base, udev_get_sys_path(udev), sizeof(base));
 680                 strlcat(base, "/subsystem", sizeof(base));
 681                 if (stat(base, &statbuf) == 0) {
 682                         scan_subsystem(udev, "subsystem", SCAN_SUBSYSTEM);
 683                         exec_list(udev, action, env);
 684                         scan_subsystem(udev, "subsystem", SCAN_DEVICES);
 685                         exec_list(udev, action, env);
 686                 } else {
 687                         scan_subsystem(udev, "bus", SCAN_SUBSYSTEM);
 688                         exec_list(udev, action, env);
 689                         scan_subsystem(udev, "bus", SCAN_DEVICES);
 690                         scan_class(udev);
 691
 692                         /* scan "block" if it isn't a "class" */
 693                         strlcpy(base, udev_get_sys_path(udev), sizeof(base));
 694                         strlcat(base, "/class/block", sizeof(base));
 695                         if (stat(base, &statbuf) != 0)
 696                                 scan_block(udev);
 697                         exec_list(udev, action, env);
 698                 }
 699         }
 700
 701 exit:
 702         name_list_cleanup(udev, &filter_subsystem_match_list);
 703         name_list_cleanup(udev, &filter_subsystem_nomatch_list);
 704         name_list_cleanup(udev, &filter_attr_match_list);
 705         name_list_cleanup(udev, &filter_attr_nomatch_list);
 706
 707         if (sock >= 0)
 708                 close(sock);
 709         return 0;
 710 }