udev/udevadm-trigger.c

   1 /*
   2  * Copyright (C) 2004-2008 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
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation, either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include <stdlib.h>
  20 #include <stddef.h>
  21 #include <string.h>
  22 #include <stdio.h>
  23 #include <unistd.h>
  24 #include <getopt.h>
  25 #include <errno.h>
  26 #include <dirent.h>
  27 #include <fcntl.h>
  28 #include <syslog.h>
  29 #include <fnmatch.h>
  30 #include <sys/stat.h>
  31 #include <sys/types.h>
  32 #include <sys/socket.h>
  33 #include <sys/un.h>
  34
  35 #include "udev.h"
  36 #include "udev_rules.h"
  37
  38 static int verbose;
  39 static int dry_run;
  40 LIST_HEAD(device_list);
  41 LIST_HEAD(filter_subsystem_match_list);
  42 LIST_HEAD(filter_subsystem_nomatch_list);
  43 LIST_HEAD(filter_attr_match_list);
  44 LIST_HEAD(filter_attr_nomatch_list);
  45 static int sock = -1;
  46 static struct sockaddr_un saddr;
  47 static socklen_t saddrlen;
  48
  49 /* devices that should run last cause of their dependencies */
  50 static int delay_device(const char *devpath)
  51 {
  52         static const char *delay_device_list[] = {
  53                 "*/md*",
  54                 "*/dm-*",
  55                 NULL
  56         };
  57         int i;
  58
  59         for (i = 0; delay_device_list[i] != NULL; i++)
  60                 if (fnmatch(delay_device_list[i], devpath, 0) == 0)
  61                         return 1;
  62         return 0;
  63 }
  64
  65 static int device_list_insert(struct udev *udev, const char *path)
  66 {
  67         char filename[PATH_SIZE];
  68         char devpath[PATH_SIZE];
  69         struct stat statbuf;
  70
  71         dbg(udev, "add '%s'\n" , path);
  72
  73         /* we only have a device, if we have an uevent file */
  74         strlcpy(filename, path, sizeof(filename));
  75         strlcat(filename, "/uevent", sizeof(filename));
  76         if (stat(filename, &statbuf) < 0)
  77                 return -1;
  78         if (!(statbuf.st_mode & S_IWUSR))
  79                 return -1;
  80
  81         strlcpy(devpath, &path[strlen(udev_get_sys_path(udev))], sizeof(devpath));
  82
  83         /* resolve possible link to real target */
  84         if (lstat(path, &statbuf) < 0)
  85                 return -1;
  86         if (S_ISLNK(statbuf.st_mode))
  87                 if (sysfs_resolve_link(udev, devpath, sizeof(devpath)) != 0)
  88                         return -1;
  89
  90         name_list_add(udev, &device_list, devpath, 1);
  91         return 0;
  92 }
  93
  94 static void trigger_uevent(struct udev *udev, const char *devpath, const char *action)
  95 {
  96         char filename[PATH_SIZE];
  97         int fd;
  98
  99         strlcpy(filename, udev_get_sys_path(udev), sizeof(filename));
 100         strlcat(filename, devpath, sizeof(filename));
 101         strlcat(filename, "/uevent", sizeof(filename));
 102
 103         if (verbose)
 104                 printf("%s\n", devpath);
 105
 106         if (dry_run)
 107                 return;
 108
 109         fd = open(filename, O_WRONLY);
 110         if (fd < 0) {
 111                 dbg(udev, "error on opening %s: %s\n", filename, strerror(errno));
 112                 return;
 113         }
 114
 115         if (write(fd, action, strlen(action)) < 0)
 116                 info(udev, "error writing '%s' to '%s': %s\n", action, filename, strerror(errno));
 117
 118         close(fd);
 119 }
 120
 121 static int pass_to_socket(struct udev *udev, const char *devpath, const char *action, const char *env)
 122 {
 123         struct udevice *udevice;
 124         struct name_entry *name_loop;
 125         char buf[4096];
 126         size_t bufpos = 0;
 127         ssize_t count;
 128         char path[PATH_SIZE];
 129         int fd;
 130         char link_target[PATH_SIZE];
 131         int len;
 132         int err = 0;
 133
 134         if (verbose)
 135                 printf("%s\n", devpath);
 136
 137         udevice = udev_device_init(udev);
 138         if (udevice == NULL)
 139                 return -1;
 140         udev_db_get_device(udevice, devpath);
 141
 142         /* add header */
 143         bufpos = snprintf(buf, sizeof(buf)-1, "%s@%s", action, devpath);
 144         bufpos++;
 145
 146         /* add cookie */
 147         if (env != NULL) {
 148                 bufpos += snprintf(&buf[bufpos], sizeof(buf)-1, "%s", env);
 149                 bufpos++;
 150         }
 151
 152         /* add standard keys */
 153         bufpos += snprintf(&buf[bufpos], sizeof(buf)-1, "DEVPATH=%s", devpath);
 154         bufpos++;
 155         bufpos += snprintf(&buf[bufpos], sizeof(buf)-1, "ACTION=%s", action);
 156         bufpos++;
 157
 158         /* add subsystem */
 159         strlcpy(path, udev_get_sys_path(udev), sizeof(path));
 160         strlcat(path, devpath, sizeof(path));
 161         strlcat(path, "/subsystem", sizeof(path));
 162         len = readlink(path, link_target, sizeof(link_target));
 163         if (len > 0) {
 164                 char *pos;
 165
 166                 link_target[len] = '\0';
 167                 pos = strrchr(link_target, '/');
 168                 if (pos != NULL) {
 169                         bufpos += snprintf(&buf[bufpos], sizeof(buf)-1, "SUBSYSTEM=%s", &pos[1]);
 170                         bufpos++;
 171                 }
 172         }
 173
 174         /* add symlinks and node name */
 175         path[0] = '\0';
 176         list_for_each_entry(name_loop, &udevice->symlink_list, node) {
 177                 strlcat(path, udev_get_dev_path(udev), sizeof(path));
 178                 strlcat(path, "/", sizeof(path));
 179                 strlcat(path, name_loop->name, sizeof(path));
 180                 strlcat(path, " ", sizeof(path));
 181         }
 182         util_remove_trailing_chars(path, ' ');
 183         if (path[0] != '\0') {
 184                 bufpos += snprintf(&buf[bufpos], sizeof(buf)-1, "DEVLINKS=%s", path);
 185                 bufpos++;
 186         }
 187         if (udevice->name[0] != '\0') {
 188                 strlcpy(path, udev_get_dev_path(udev), sizeof(path));
 189                 strlcat(path, "/", sizeof(path));
 190                 strlcat(path, udevice->name, sizeof(path));
 191                 bufpos += snprintf(&buf[bufpos], sizeof(buf)-1, "DEVNAME=%s", path);
 192                 bufpos++;
 193         }
 194
 195         /* add keys from device "uevent" file */
 196         strlcpy(path, udev_get_sys_path(udev), sizeof(path));
 197         strlcat(path, devpath, sizeof(path));
 198         strlcat(path, "/uevent", sizeof(path));
 199         fd = open(path, O_RDONLY);
 200         if (fd >= 0) {
 201                 char value[4096];
 202
 203                 count = read(fd, value, sizeof(value));
 204                 close(fd);
 205                 if (count > 0) {
 206                         char *key;
 207
 208                         value[count] = '\0';
 209                         key = value;
 210                         while (key[0] != '\0') {
 211                                 char *next;
 212
 213                                 next = strchr(key, '\n');
 214                                 if (next == NULL)
 215                                         break;
 216                                 next[0] = '\0';
 217                                 bufpos += strlcpy(&buf[bufpos], key, sizeof(buf) - bufpos-1);
 218                                 bufpos++;
 219                                 key = &next[1];
 220                         }
 221                 }
 222         }
 223
 224         /* add keys from database */
 225         list_for_each_entry(name_loop, &udevice->env_list, node) {
 226                 bufpos += strlcpy(&buf[bufpos], name_loop->name, sizeof(buf) - bufpos-1);
 227                 bufpos++;
 228         }
 229         if (bufpos > sizeof(buf))
 230                 bufpos = sizeof(buf);
 231
 232         count = sendto(sock, &buf, bufpos, 0, (struct sockaddr *)&saddr, saddrlen);
 233         if (count < 0)
 234                 err = -1;
 235
 236         return err;
 237 }
 238
 239 static void exec_list(struct udev *udev, const char *action, const char *env)
 240 {
 241         struct name_entry *loop_device;
 242         struct name_entry *tmp_device;
 243
 244         list_for_each_entry_safe(loop_device, tmp_device, &device_list, node) {
 245                 if (delay_device(loop_device->name))
 246                         continue;
 247                 if (sock >= 0)
 248                         pass_to_socket(udev, loop_device->name, action, env);
 249                 else
 250                         trigger_uevent(udev, loop_device->name, action);
 251                 list_del(&loop_device->node);
 252                 free(loop_device);
 253         }
 254
 255         /* trigger remaining delayed devices */
 256         list_for_each_entry_safe(loop_device, tmp_device, &device_list, node) {
 257                 if (sock >= 0)
 258                         pass_to_socket(udev, loop_device->name, action, env);
 259                 else
 260                         trigger_uevent(udev, loop_device->name, action);
 261                 list_del(&loop_device->node);
 262                 free(loop_device);
 263         }
 264 }
 265
 266 static int subsystem_filtered(const char *subsystem)
 267 {
 268         struct name_entry *loop_name;
 269
 270         /* skip devices matching the listed subsystems */
 271         list_for_each_entry(loop_name, &filter_subsystem_nomatch_list, node)
 272                 if (fnmatch(loop_name->name, subsystem, 0) == 0)
 273                         return 1;
 274
 275         /* skip devices not matching the listed subsystems */
 276         if (!list_empty(&filter_subsystem_match_list)) {
 277                 list_for_each_entry(loop_name, &filter_subsystem_match_list, node)
 278                         if (fnmatch(loop_name->name, subsystem, 0) == 0)
 279                                 return 0;
 280                 return 1;
 281         }
 282
 283         return 0;
 284 }
 285
 286 static int attr_match(const char *path, const char *attr_value)
 287 {
 288         char attr[NAME_SIZE];
 289         char file[PATH_SIZE];
 290         char *match_value;
 291
 292         strlcpy(attr, attr_value, sizeof(attr));
 293
 294         /* separate attr and match value */
 295         match_value = strchr(attr, '=');
 296         if (match_value != NULL) {
 297                 match_value[0] = '\0';
 298                 match_value = &match_value[1];
 299         }
 300
 301         strlcpy(file, path, sizeof(file));
 302         strlcat(file, "/", sizeof(file));
 303         strlcat(file, attr, sizeof(file));
 304
 305         if (match_value != NULL) {
 306                 /* match file content */
 307                 char value[NAME_SIZE];
 308                 int fd;
 309                 ssize_t size;
 310
 311                 fd = open(file, O_RDONLY);
 312                 if (fd < 0)
 313                         return 0;
 314                 size = read(fd, value, sizeof(value));
 315                 close(fd);
 316                 if (size < 0)
 317                         return 0;
 318                 value[size] = '\0';
 319                 util_remove_trailing_chars(value, '\n');
 320
 321                 /* match if attribute value matches */
 322                 if (fnmatch(match_value, value, 0) == 0)
 323                         return 1;
 324         } else {
 325                 /* match if attribute exists */
 326                 struct stat statbuf;
 327
 328                 if (stat(file, &statbuf) == 0)
 329                         return 1;
 330         }
 331         return 0;
 332 }
 333
 334 static int attr_filtered(const char *path)
 335 {
 336         struct name_entry *loop_name;
 337
 338         /* skip devices matching the listed sysfs attributes */
 339         list_for_each_entry(loop_name, &filter_attr_nomatch_list, node)
 340                 if (attr_match(path, loop_name->name))
 341                         return 1;
 342
 343         /* skip devices not matching the listed sysfs attributes */
 344         if (!list_empty(&filter_attr_match_list)) {
 345                 list_for_each_entry(loop_name, &filter_attr_match_list, node)
 346                         if (attr_match(path, loop_name->name))
 347                                 return 0;
 348                 return 1;
 349         }
 350         return 0;
 351 }
 352
 353 enum scan_type {
 354         SCAN_DEVICES,
 355         SCAN_SUBSYSTEM,
 356 };
 357
 358 static void scan_subsystem(struct udev *udev, const char *subsys, enum scan_type scan)
 359 {
 360         char base[PATH_SIZE];
 361         DIR *dir;
 362         struct dirent *dent;
 363         const char *subdir;
 364
 365         if (scan == SCAN_DEVICES)
 366                 subdir = "/devices";
 367         else if (scan == SCAN_SUBSYSTEM)
 368                 subdir = "/drivers";
 369         else
 370                 return;
 371
 372         strlcpy(base, udev_get_sys_path(udev), sizeof(base));
 373         strlcat(base, "/", sizeof(base));
 374         strlcat(base, subsys, sizeof(base));
 375
 376         dir = opendir(base);
 377         if (dir != NULL) {
 378                 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
 379                         char dirname[PATH_SIZE];
 380                         DIR *dir2;
 381                         struct dirent *dent2;
 382
 383                         if (dent->d_name[0] == '.')
 384                                 continue;
 385
 386                         if (scan == SCAN_DEVICES)
 387                                 if (subsystem_filtered(dent->d_name))
 388                                         continue;
 389
 390                         strlcpy(dirname, base, sizeof(dirname));
 391                         strlcat(dirname, "/", sizeof(dirname));
 392                         strlcat(dirname, dent->d_name, sizeof(dirname));
 393
 394                         if (scan == SCAN_SUBSYSTEM) {
 395                                 if (attr_filtered(dirname))
 396                                         continue;
 397                                 if (!subsystem_filtered("subsystem"))
 398                                         device_list_insert(udev, dirname);
 399                                 if (subsystem_filtered("drivers"))
 400                                         continue;
 401                         }
 402
 403                         strlcat(dirname, subdir, sizeof(dirname));
 404
 405                         /* look for devices/drivers */
 406                         dir2 = opendir(dirname);
 407                         if (dir2 != NULL) {
 408                                 for (dent2 = readdir(dir2); dent2 != NULL; dent2 = readdir(dir2)) {
 409                                         char dirname2[PATH_SIZE];
 410
 411                                         if (dent2->d_name[0] == '.')
 412                                                 continue;
 413
 414                                         strlcpy(dirname2, dirname, sizeof(dirname2));
 415                                         strlcat(dirname2, "/", sizeof(dirname2));
 416                                         strlcat(dirname2, dent2->d_name, sizeof(dirname2));
 417                                         if (attr_filtered(dirname2))
 418                                                 continue;
 419                                         device_list_insert(udev, dirname2);
 420                                 }
 421                                 closedir(dir2);
 422                         }
 423                 }
 424                 closedir(dir);
 425         }
 426 }
 427
 428 static void scan_block(struct udev *udev)
 429 {
 430         char base[PATH_SIZE];
 431         DIR *dir;
 432         struct dirent *dent;
 433
 434         if (subsystem_filtered("block"))
 435                 return;
 436
 437         strlcpy(base, udev_get_sys_path(udev), sizeof(base));
 438         strlcat(base, "/block", sizeof(base));
 439
 440         dir = opendir(base);
 441         if (dir != NULL) {
 442                 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
 443                         char dirname[PATH_SIZE];
 444                         DIR *dir2;
 445                         struct dirent *dent2;
 446
 447                         if (dent->d_name[0] == '.')
 448                                 continue;
 449
 450                         strlcpy(dirname, base, sizeof(dirname));
 451                         strlcat(dirname, "/", sizeof(dirname));
 452                         strlcat(dirname, dent->d_name, sizeof(dirname));
 453                         if (attr_filtered(dirname))
 454                                 continue;
 455                         if (device_list_insert(udev, dirname) != 0)
 456                                 continue;
 457
 458                         /* look for partitions */
 459                         dir2 = opendir(dirname);
 460                         if (dir2 != NULL) {
 461                                 for (dent2 = readdir(dir2); dent2 != NULL; dent2 = readdir(dir2)) {
 462                                         char dirname2[PATH_SIZE];
 463
 464                                         if (dent2->d_name[0] == '.')
 465                                                 continue;
 466
 467                                         if (!strcmp(dent2->d_name,"device"))
 468                                                 continue;
 469
 470                                         strlcpy(dirname2, dirname, sizeof(dirname2));
 471                                         strlcat(dirname2, "/", sizeof(dirname2));
 472                                         strlcat(dirname2, dent2->d_name, sizeof(dirname2));
 473                                         if (attr_filtered(dirname2))
 474                                                 continue;
 475                                         device_list_insert(udev, dirname2);
 476                                 }
 477                                 closedir(dir2);
 478                         }
 479                 }
 480                 closedir(dir);
 481         }
 482 }
 483
 484 static void scan_class(struct udev *udev)
 485 {
 486         char base[PATH_SIZE];
 487         DIR *dir;
 488         struct dirent *dent;
 489
 490         strlcpy(base, udev_get_sys_path(udev), sizeof(base));
 491         strlcat(base, "/class", sizeof(base));
 492
 493         dir = opendir(base);
 494         if (dir != NULL) {
 495                 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
 496                         char dirname[PATH_SIZE];
 497                         DIR *dir2;
 498                         struct dirent *dent2;
 499
 500                         if (dent->d_name[0] == '.')
 501                                 continue;
 502
 503                         if (subsystem_filtered(dent->d_name))
 504                                 continue;
 505
 506                         strlcpy(dirname, base, sizeof(dirname));
 507                         strlcat(dirname, "/", sizeof(dirname));
 508                         strlcat(dirname, dent->d_name, sizeof(dirname));
 509                         dir2 = opendir(dirname);
 510                         if (dir2 != NULL) {
 511                                 for (dent2 = readdir(dir2); dent2 != NULL; dent2 = readdir(dir2)) {
 512                                         char dirname2[PATH_SIZE];
 513
 514                                         if (dent2->d_name[0] == '.')
 515                                                 continue;
 516
 517                                         if (!strcmp(dent2->d_name, "device"))
 518                                                 continue;
 519
 520                                         strlcpy(dirname2, dirname, sizeof(dirname2));
 521                                         strlcat(dirname2, "/", sizeof(dirname2));
 522                                         strlcat(dirname2, dent2->d_name, sizeof(dirname2));
 523                                         if (attr_filtered(dirname2))
 524                                                 continue;
 525                                         device_list_insert(udev, dirname2);
 526                                 }
 527                                 closedir(dir2);
 528                         }
 529                 }
 530                 closedir(dir);
 531         }
 532 }
 533
 534 static void scan_failed(struct udev *udev)
 535 {
 536         char base[PATH_SIZE];
 537         DIR *dir;
 538         struct dirent *dent;
 539
 540         strlcpy(base, udev_get_dev_path(udev), sizeof(base));
 541         strlcat(base, "/.udev/failed", sizeof(base));
 542
 543         dir = opendir(base);
 544         if (dir != NULL) {
 545                 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
 546                         char device[PATH_SIZE];
 547                         size_t start;
 548
 549                         if (dent->d_name[0] == '.')
 550                                 continue;
 551
 552                         start = strlcpy(device, udev_get_sys_path(udev), sizeof(device));
 553                         if(start >= sizeof(device))
 554                                 start = sizeof(device) - 1;
 555                         strlcat(device, dent->d_name, sizeof(device));
 556                         util_path_decode(&device[start]);
 557                         device_list_insert(udev, device);
 558                 }
 559                 closedir(dir);
 560         }
 561 }
 562
 563 int udevadm_trigger(struct udev *udev, int argc, char *argv[])
 564 {
 565         int failed = 0;
 566         const char *sockpath = NULL;
 567         int option;
 568         const char *action = "add";
 569         const char *env = NULL;
 570         static const struct option options[] = {
 571                 { "verbose", 0, NULL, 'v' },
 572                 { "dry-run", 0, NULL, 'n' },
 573                 { "retry-failed", 0, NULL, 'F' },
 574                 { "socket", 1, NULL, 'o' },
 575                 { "help", 0, NULL, 'h' },
 576                 { "action", 1, NULL, 'c' },
 577                 { "subsystem-match", 1, NULL, 's' },
 578                 { "subsystem-nomatch", 1, NULL, 'S' },
 579                 { "attr-match", 1, NULL, 'a' },
 580                 { "attr-nomatch", 1, NULL, 'A' },
 581                 { "env", 1, NULL, 'e' },
 582                 {}
 583         };
 584
 585         dbg(udev, "version %s\n", VERSION);
 586
 587         while (1) {
 588                 option = getopt_long(argc, argv, "vnFo:hce::s:S:a:A:", options, NULL);
 589                 if (option == -1)
 590                         break;
 591
 592                 switch (option) {
 593                 case 'v':
 594                         verbose = 1;
 595                         break;
 596                 case 'n':
 597                         dry_run = 1;
 598                         break;
 599                 case 'F':
 600                         failed = 1;
 601                         break;
 602                 case 'o':
 603                         sockpath = optarg;
 604                         break;
 605                 case 'c':
 606                         action = optarg;
 607                         break;
 608                 case 'e':
 609                         if (strchr(optarg, '=') != NULL)
 610                                 env = optarg;
 611                         break;
 612                 case 's':
 613                         name_list_add(udev, &filter_subsystem_match_list, optarg, 0);
 614                         break;
 615                 case 'S':
 616                         name_list_add(udev, &filter_subsystem_nomatch_list, optarg, 0);
 617                         break;
 618                 case 'a':
 619                         name_list_add(udev, &filter_attr_match_list, optarg, 0);
 620                         break;
 621                 case 'A':
 622                         name_list_add(udev, &filter_attr_nomatch_list, optarg, 0);
 623                         break;
 624                 case 'h':
 625                         printf("Usage: udevadm trigger OPTIONS\n"
 626                                "  --verbose                       print the list of devices while running\n"
 627                                "  --dry-run                       do not actually trigger the events\n"
 628                                "  --retry-failed                  trigger only the events which have been\n"
 629                                "                                  marked as failed during a previous run\n"
 630                                "  --socket=<socket path>          pass events to socket instead of triggering kernel events\n"
 631                                "  --env=<KEY>=<value>             pass an additional key (works only with --socket=)\n"
 632                                "  --subsystem-match=<subsystem>   trigger devices from a matching subystem\n"
 633                                "  --subsystem-nomatch=<subsystem> exclude devices from a matching subystem\n"
 634                                "  --attr-match=<file[=<value>]>   trigger devices with a matching sysfs\n"
 635                                "                                  attribute\n"
 636                                "  --attr-nomatch=<file[=<value>]> exclude devices with a matching sysfs\n"
 637                                "                                  attribute\n"
 638                                "  --help                          print this text\n"
 639                                "\n");
 640                         goto exit;
 641                 default:
 642                         goto exit;
 643                 }
 644         }
 645
 646         if (sockpath != NULL) {
 647                 struct stat stats;
 648
 649                 sock = socket(AF_LOCAL, SOCK_DGRAM, 0);
 650                 memset(&saddr, 0x00, sizeof(struct sockaddr_un));
 651                 saddr.sun_family = AF_LOCAL;
 652                 if (sockpath[0] == '@') {
 653                         /* abstract namespace socket requested */
 654                         strlcpy(&saddr.sun_path[1], &sockpath[1], sizeof(saddr.sun_path)-1);
 655                         saddrlen = offsetof(struct sockaddr_un, sun_path) + 1 + strlen(&saddr.sun_path[1]);
 656                 } else if (stat(sockpath, &stats) == 0 && S_ISSOCK(stats.st_mode)) {
 657                         /* existing socket file */
 658                         strlcpy(saddr.sun_path, sockpath, sizeof(saddr.sun_path));
 659                         saddrlen = offsetof(struct sockaddr_un, sun_path) + strlen(saddr.sun_path);
 660                 } else {
 661                         /* no socket file, assume abstract namespace socket */
 662                         strlcpy(&saddr.sun_path[1], sockpath, sizeof(saddr.sun_path)-1);
 663                         saddrlen = offsetof(struct sockaddr_un, sun_path) + 1 + strlen(&saddr.sun_path[1]);
 664                 }
 665         } else if (env != NULL) {
 666                 fprintf(stderr, "error: --env= only valid with --socket= option\n");
 667                 goto exit;
 668         }
 669
 670         if (failed) {
 671                 scan_failed(udev);
 672                 exec_list(udev, action, env);
 673         } else {
 674                 char base[PATH_SIZE];
 675                 struct stat statbuf;
 676
 677                 /* if we have /sys/subsystem, forget all the old stuff */
 678                 strlcpy(base, udev_get_sys_path(udev), sizeof(base));
 679                 strlcat(base, "/subsystem", sizeof(base));
 680                 if (stat(base, &statbuf) == 0) {
 681                         scan_subsystem(udev, "subsystem", SCAN_SUBSYSTEM);
 682                         exec_list(udev, action, env);
 683                         scan_subsystem(udev, "subsystem", SCAN_DEVICES);
 684                         exec_list(udev, action, env);
 685                 } else {
 686                         scan_subsystem(udev, "bus", SCAN_SUBSYSTEM);
 687                         exec_list(udev, action, env);
 688                         scan_subsystem(udev, "bus", SCAN_DEVICES);
 689                         scan_class(udev);
 690
 691                         /* scan "block" if it isn't a "class" */
 692                         strlcpy(base, udev_get_sys_path(udev), sizeof(base));
 693                         strlcat(base, "/class/block", sizeof(base));
 694                         if (stat(base, &statbuf) != 0)
 695                                 scan_block(udev);
 696                         exec_list(udev, action, env);
 697                 }
 698         }
 699
 700 exit:
 701         name_list_cleanup(udev, &filter_subsystem_match_list);
 702         name_list_cleanup(udev, &filter_subsystem_nomatch_list);
 703         name_list_cleanup(udev, &filter_attr_match_list);
 704         name_list_cleanup(udev, &filter_attr_nomatch_list);
 705
 706         if (sock >= 0)
 707                 close(sock);
 708         return 0;
 709 }