2 * Copyright (C) 2004-2008 Kay Sievers <kay@vrfy.org>
3 * Copyright (C) 2006 Hannes Reinecke <hare@suse.de>
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.
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.
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/>.
31 #include <sys/types.h>
32 #include <sys/socket.h>
36 #include "udev_rules.h"
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);
46 static struct sockaddr_un saddr;
47 static socklen_t saddrlen;
49 /* devices that should run last cause of their dependencies */
50 static int delay_device(const char *devpath)
52 static const char *delay_device_list[] = {
59 for (i = 0; delay_device_list[i] != NULL; i++)
60 if (fnmatch(delay_device_list[i], devpath, 0) == 0)
65 static int device_list_insert(struct udev *udev, const char *path)
67 char filename[PATH_SIZE];
68 char devpath[PATH_SIZE];
71 dbg(udev, "add '%s'\n" , path);
73 /* we only have a device, if we have an uevent file */
74 util_strlcpy(filename, path, sizeof(filename));
75 util_strlcat(filename, "/uevent", sizeof(filename));
76 if (stat(filename, &statbuf) < 0)
78 if (!(statbuf.st_mode & S_IWUSR))
81 util_strlcpy(devpath, &path[strlen(udev_get_sys_path(udev))], sizeof(devpath));
83 /* resolve possible link to real target */
84 if (lstat(path, &statbuf) < 0)
86 if (S_ISLNK(statbuf.st_mode))
87 if (sysfs_resolve_link(udev, devpath, sizeof(devpath)) != 0)
90 name_list_add(udev, &device_list, devpath, 1);
94 static void trigger_uevent(struct udev *udev, const char *devpath, const char *action)
96 char filename[PATH_SIZE];
99 util_strlcpy(filename, udev_get_sys_path(udev), sizeof(filename));
100 util_strlcat(filename, devpath, sizeof(filename));
101 util_strlcat(filename, "/uevent", sizeof(filename));
104 printf("%s\n", devpath);
109 fd = open(filename, O_WRONLY);
111 dbg(udev, "error on opening %s: %s\n", filename, strerror(errno));
115 if (write(fd, action, strlen(action)) < 0)
116 info(udev, "error writing '%s' to '%s': %s\n", action, filename, strerror(errno));
121 static int pass_to_socket(struct udev *udev, const char *devpath, const char *action, const char *env)
123 struct udevice *udevice;
124 struct name_entry *name_loop;
128 char path[PATH_SIZE];
130 char link_target[PATH_SIZE];
135 printf("%s\n", devpath);
137 udevice = udev_device_init(udev);
140 udev_db_get_device(udevice, devpath);
143 bufpos = snprintf(buf, sizeof(buf)-1, "%s@%s", action, devpath);
148 bufpos += snprintf(&buf[bufpos], sizeof(buf)-1, "%s", env);
152 /* add standard keys */
153 bufpos += snprintf(&buf[bufpos], sizeof(buf)-1, "DEVPATH=%s", devpath);
155 bufpos += snprintf(&buf[bufpos], sizeof(buf)-1, "ACTION=%s", action);
159 util_strlcpy(path, udev_get_sys_path(udev), sizeof(path));
160 util_strlcat(path, devpath, sizeof(path));
161 util_strlcat(path, "/subsystem", sizeof(path));
162 len = readlink(path, link_target, sizeof(link_target));
166 link_target[len] = '\0';
167 pos = strrchr(link_target, '/');
169 bufpos += snprintf(&buf[bufpos], sizeof(buf)-1, "SUBSYSTEM=%s", &pos[1]);
174 /* add symlinks and node name */
176 list_for_each_entry(name_loop, &udevice->symlink_list, node) {
177 util_strlcat(path, udev_get_dev_path(udev), sizeof(path));
178 util_strlcat(path, "/", sizeof(path));
179 util_strlcat(path, name_loop->name, sizeof(path));
180 util_strlcat(path, " ", sizeof(path));
182 util_remove_trailing_chars(path, ' ');
183 if (path[0] != '\0') {
184 bufpos += snprintf(&buf[bufpos], sizeof(buf)-1, "DEVLINKS=%s", path);
187 if (udevice->name[0] != '\0') {
188 util_strlcpy(path, udev_get_dev_path(udev), sizeof(path));
189 util_strlcat(path, "/", sizeof(path));
190 util_strlcat(path, udevice->name, sizeof(path));
191 bufpos += snprintf(&buf[bufpos], sizeof(buf)-1, "DEVNAME=%s", path);
195 /* add keys from device "uevent" file */
196 util_strlcpy(path, udev_get_sys_path(udev), sizeof(path));
197 util_strlcat(path, devpath, sizeof(path));
198 util_strlcat(path, "/uevent", sizeof(path));
199 fd = open(path, O_RDONLY);
203 count = read(fd, value, sizeof(value));
210 while (key[0] != '\0') {
213 next = strchr(key, '\n');
217 bufpos += util_strlcpy(&buf[bufpos], key, sizeof(buf) - bufpos-1);
224 /* add keys from database */
225 list_for_each_entry(name_loop, &udevice->env_list, node) {
226 bufpos += util_strlcpy(&buf[bufpos], name_loop->name, sizeof(buf) - bufpos-1);
229 if (bufpos > sizeof(buf))
230 bufpos = sizeof(buf);
232 count = sendto(sock, &buf, bufpos, 0, (struct sockaddr *)&saddr, saddrlen);
239 static void exec_list(struct udev *udev, const char *action, const char *env)
241 struct name_entry *loop_device;
242 struct name_entry *tmp_device;
244 list_for_each_entry_safe(loop_device, tmp_device, &device_list, node) {
245 if (delay_device(loop_device->name))
248 pass_to_socket(udev, loop_device->name, action, env);
250 trigger_uevent(udev, loop_device->name, action);
251 list_del(&loop_device->node);
255 /* trigger remaining delayed devices */
256 list_for_each_entry_safe(loop_device, tmp_device, &device_list, node) {
258 pass_to_socket(udev, loop_device->name, action, env);
260 trigger_uevent(udev, loop_device->name, action);
261 list_del(&loop_device->node);
266 static int subsystem_filtered(const char *subsystem)
268 struct name_entry *loop_name;
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)
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)
286 static int attr_match(const char *path, const char *attr_value)
288 char attr[NAME_SIZE];
289 char file[PATH_SIZE];
292 util_strlcpy(attr, attr_value, sizeof(attr));
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];
301 util_strlcpy(file, path, sizeof(file));
302 util_strlcat(file, "/", sizeof(file));
303 util_strlcat(file, attr, sizeof(file));
305 if (match_value != NULL) {
306 /* match file content */
307 char value[NAME_SIZE];
311 fd = open(file, O_RDONLY);
314 size = read(fd, value, sizeof(value));
319 util_remove_trailing_chars(value, '\n');
321 /* match if attribute value matches */
322 if (fnmatch(match_value, value, 0) == 0)
325 /* match if attribute exists */
328 if (stat(file, &statbuf) == 0)
334 static int attr_filtered(const char *path)
336 struct name_entry *loop_name;
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))
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))
358 static void scan_subsystem(struct udev *udev, const char *subsys, enum scan_type scan)
360 char base[PATH_SIZE];
365 if (scan == SCAN_DEVICES)
367 else if (scan == SCAN_SUBSYSTEM)
372 util_strlcpy(base, udev_get_sys_path(udev), sizeof(base));
373 util_strlcat(base, "/", sizeof(base));
374 util_strlcat(base, subsys, sizeof(base));
378 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
379 char dirname[PATH_SIZE];
381 struct dirent *dent2;
383 if (dent->d_name[0] == '.')
386 if (scan == SCAN_DEVICES)
387 if (subsystem_filtered(dent->d_name))
390 util_strlcpy(dirname, base, sizeof(dirname));
391 util_strlcat(dirname, "/", sizeof(dirname));
392 util_strlcat(dirname, dent->d_name, sizeof(dirname));
394 if (scan == SCAN_SUBSYSTEM) {
395 if (attr_filtered(dirname))
397 if (!subsystem_filtered("subsystem"))
398 device_list_insert(udev, dirname);
399 if (subsystem_filtered("drivers"))
403 util_strlcat(dirname, subdir, sizeof(dirname));
405 /* look for devices/drivers */
406 dir2 = opendir(dirname);
408 for (dent2 = readdir(dir2); dent2 != NULL; dent2 = readdir(dir2)) {
409 char dirname2[PATH_SIZE];
411 if (dent2->d_name[0] == '.')
414 util_strlcpy(dirname2, dirname, sizeof(dirname2));
415 util_strlcat(dirname2, "/", sizeof(dirname2));
416 util_strlcat(dirname2, dent2->d_name, sizeof(dirname2));
417 if (attr_filtered(dirname2))
419 device_list_insert(udev, dirname2);
428 static void scan_block(struct udev *udev)
430 char base[PATH_SIZE];
434 if (subsystem_filtered("block"))
437 util_strlcpy(base, udev_get_sys_path(udev), sizeof(base));
438 util_strlcat(base, "/block", sizeof(base));
442 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
443 char dirname[PATH_SIZE];
445 struct dirent *dent2;
447 if (dent->d_name[0] == '.')
450 util_strlcpy(dirname, base, sizeof(dirname));
451 util_strlcat(dirname, "/", sizeof(dirname));
452 util_strlcat(dirname, dent->d_name, sizeof(dirname));
453 if (attr_filtered(dirname))
455 if (device_list_insert(udev, dirname) != 0)
458 /* look for partitions */
459 dir2 = opendir(dirname);
461 for (dent2 = readdir(dir2); dent2 != NULL; dent2 = readdir(dir2)) {
462 char dirname2[PATH_SIZE];
464 if (dent2->d_name[0] == '.')
467 if (!strcmp(dent2->d_name,"device"))
470 util_strlcpy(dirname2, dirname, sizeof(dirname2));
471 util_strlcat(dirname2, "/", sizeof(dirname2));
472 util_strlcat(dirname2, dent2->d_name, sizeof(dirname2));
473 if (attr_filtered(dirname2))
475 device_list_insert(udev, dirname2);
484 static void scan_class(struct udev *udev)
486 char base[PATH_SIZE];
490 util_strlcpy(base, udev_get_sys_path(udev), sizeof(base));
491 util_strlcat(base, "/class", sizeof(base));
495 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
496 char dirname[PATH_SIZE];
498 struct dirent *dent2;
500 if (dent->d_name[0] == '.')
503 if (subsystem_filtered(dent->d_name))
506 util_strlcpy(dirname, base, sizeof(dirname));
507 util_strlcat(dirname, "/", sizeof(dirname));
508 util_strlcat(dirname, dent->d_name, sizeof(dirname));
509 dir2 = opendir(dirname);
511 for (dent2 = readdir(dir2); dent2 != NULL; dent2 = readdir(dir2)) {
512 char dirname2[PATH_SIZE];
514 if (dent2->d_name[0] == '.')
517 if (!strcmp(dent2->d_name, "device"))
520 util_strlcpy(dirname2, dirname, sizeof(dirname2));
521 util_strlcat(dirname2, "/", sizeof(dirname2));
522 util_strlcat(dirname2, dent2->d_name, sizeof(dirname2));
523 if (attr_filtered(dirname2))
525 device_list_insert(udev, dirname2);
534 static void scan_failed(struct udev *udev)
536 char base[PATH_SIZE];
540 util_strlcpy(base, udev_get_dev_path(udev), sizeof(base));
541 util_strlcat(base, "/.udev/failed", sizeof(base));
545 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
546 char device[PATH_SIZE];
549 if (dent->d_name[0] == '.')
552 start = util_strlcpy(device, udev_get_sys_path(udev), sizeof(device));
553 if(start >= sizeof(device))
554 start = sizeof(device) - 1;
555 util_strlcat(device, dent->d_name, sizeof(device));
556 util_path_decode(&device[start]);
557 device_list_insert(udev, device);
563 int udevadm_trigger(struct udev *udev, int argc, char *argv[])
566 const char *sockpath = NULL;
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' },
585 dbg(udev, "version %s\n", VERSION);
588 option = getopt_long(argc, argv, "vnFo:hce::s:S:a:A:", options, NULL);
609 if (strchr(optarg, '=') != NULL)
613 name_list_add(udev, &filter_subsystem_match_list, optarg, 0);
616 name_list_add(udev, &filter_subsystem_nomatch_list, optarg, 0);
619 name_list_add(udev, &filter_attr_match_list, optarg, 0);
622 name_list_add(udev, &filter_attr_nomatch_list, optarg, 0);
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"
636 " --attr-nomatch=<file[=<value>]> exclude devices with a matching sysfs\n"
638 " --help print this text\n"
646 if (sockpath != NULL) {
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 util_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 util_strlcpy(saddr.sun_path, sockpath, sizeof(saddr.sun_path));
659 saddrlen = offsetof(struct sockaddr_un, sun_path) + strlen(saddr.sun_path);
661 /* no socket file, assume abstract namespace socket */
662 util_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]);
665 } else if (env != NULL) {
666 fprintf(stderr, "error: --env= only valid with --socket= option\n");
672 exec_list(udev, action, env);
674 char base[PATH_SIZE];
677 /* if we have /sys/subsystem, forget all the old stuff */
678 util_strlcpy(base, udev_get_sys_path(udev), sizeof(base));
679 util_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);
686 scan_subsystem(udev, "bus", SCAN_SUBSYSTEM);
687 exec_list(udev, action, env);
688 scan_subsystem(udev, "bus", SCAN_DEVICES);
691 /* scan "block" if it isn't a "class" */
692 util_strlcpy(base, udev_get_sys_path(udev), sizeof(base));
693 util_strlcat(base, "/class/block", sizeof(base));
694 if (stat(base, &statbuf) != 0)
696 exec_list(udev, action, env);
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);