2 * Copyright (C) 2003-2010 Kay Sievers <kay.sievers@vrfy.org>
4 * This program is free software: you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation, either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <http://www.gnu.org/licenses/>.
28 #include <sys/ioctl.h>
29 #include <sys/prctl.h>
31 #include <sys/epoll.h>
33 #include <sys/socket.h>
34 #include <sys/signalfd.h>
35 #include <linux/sockios.h>
39 struct udev_event *udev_event_new(struct udev_device *dev)
41 struct udev *udev = udev_device_get_udev(dev);
42 struct udev_event *event;
44 event = calloc(1, sizeof(struct udev_event));
49 udev_list_init(udev, &event->run_list, false);
50 event->fd_signal = -1;
51 event->birth_usec = now_usec();
52 event->timeout_usec = 60 * 1000 * 1000;
53 dbg(event->udev, "allocated event %p\n", event);
57 void udev_event_unref(struct udev_event *event)
61 udev_list_cleanup(&event->run_list);
62 free(event->tmp_node);
63 free(event->program_result);
65 dbg(event->udev, "free event %p\n", event);
69 size_t udev_event_apply_format(struct udev_event *event, const char *src, char *dest, size_t size)
71 struct udev_device *dev = event->dev;
91 static const struct subst_map {
96 { .name = "tempnode", .fmt = 'N', .type = SUBST_TEMP_NODE },
97 { .name = "attr", .fmt = 's', .type = SUBST_ATTR },
98 { .name = "sysfs", .fmt = 's', .type = SUBST_ATTR },
99 { .name = "env", .fmt = 'E', .type = SUBST_ENV },
100 { .name = "kernel", .fmt = 'k', .type = SUBST_KERNEL },
101 { .name = "number", .fmt = 'n', .type = SUBST_KERNEL_NUMBER },
102 { .name = "driver", .fmt = 'd', .type = SUBST_DRIVER },
103 { .name = "devpath", .fmt = 'p', .type = SUBST_DEVPATH },
104 { .name = "id", .fmt = 'b', .type = SUBST_ID },
105 { .name = "major", .fmt = 'M', .type = SUBST_MAJOR },
106 { .name = "minor", .fmt = 'm', .type = SUBST_MINOR },
107 { .name = "result", .fmt = 'c', .type = SUBST_RESULT },
108 { .name = "parent", .fmt = 'P', .type = SUBST_PARENT },
109 { .name = "name", .fmt = 'D', .type = SUBST_NAME },
110 { .name = "links", .fmt = 'L', .type = SUBST_LINKS },
111 { .name = "root", .fmt = 'r', .type = SUBST_ROOT },
112 { .name = "sys", .fmt = 'S', .type = SUBST_SYS },
123 enum subst_type type = SUBST_UNKNOWN;
124 char attrbuf[UTIL_PATH_SIZE];
127 while (from[0] != '\0') {
128 if (from[0] == '$') {
129 /* substitute named variable */
132 if (from[1] == '$') {
137 for (i = 0; i < ARRAY_SIZE(map); i++) {
138 if (strncmp(&from[1], map[i].name, strlen(map[i].name)) == 0) {
140 from += strlen(map[i].name)+1;
141 dbg(event->udev, "will substitute format name '%s'\n", map[i].name);
145 } else if (from[0] == '%') {
146 /* substitute format char */
149 if (from[1] == '%') {
154 for (i = 0; i < ARRAY_SIZE(map); i++) {
155 if (from[1] == map[i].fmt) {
158 dbg(event->udev, "will substitute format char '%c'\n", map[i].fmt);
175 /* extract possible $format{attr} */
176 if (from[0] == '{') {
180 for (i = 0; from[i] != '}'; i++) {
181 if (from[i] == '\0') {
182 err(event->udev, "missing closing brace for format '%s'\n", src);
186 if (i >= sizeof(attrbuf))
188 memcpy(attrbuf, from, i);
198 l = util_strpcpy(&s, l, udev_device_get_devpath(dev));
199 dbg(event->udev, "substitute devpath '%s'\n", udev_device_get_devpath(dev));
202 l = util_strpcpy(&s, l, udev_device_get_sysname(dev));
203 dbg(event->udev, "substitute kernel name '%s'\n", udev_device_get_sysname(dev));
205 case SUBST_KERNEL_NUMBER:
206 if (udev_device_get_sysnum(dev) == NULL)
208 l = util_strpcpy(&s, l, udev_device_get_sysnum(dev));
209 dbg(event->udev, "substitute kernel number '%s'\n", udev_device_get_sysnum(dev));
212 if (event->dev_parent == NULL)
214 l = util_strpcpy(&s, l, udev_device_get_sysname(event->dev_parent));
215 dbg(event->udev, "substitute id '%s'\n", udev_device_get_sysname(event->dev_parent));
220 if (event->dev_parent == NULL)
223 driver = udev_device_get_driver(event->dev_parent);
226 l = util_strpcpy(&s, l, driver);
227 dbg(event->udev, "substitute driver '%s'\n", driver);
231 char num[UTIL_PATH_SIZE];
233 sprintf(num, "%d", major(udev_device_get_devnum(dev)));
234 l = util_strpcpy(&s, l, num);
235 dbg(event->udev, "substitute major number '%s'\n", num);
239 char num[UTIL_PATH_SIZE];
241 sprintf(num, "%d", minor(udev_device_get_devnum(dev)));
242 l = util_strpcpy(&s, l, num);
243 dbg(event->udev, "substitute minor number '%s'\n", num);
250 if (event->program_result == NULL)
252 /* get part part of the result string */
255 i = strtoul(attr, &rest, 10);
257 char result[UTIL_PATH_SIZE];
258 char tmp[UTIL_PATH_SIZE];
261 dbg(event->udev, "request part #%d of result string\n", i);
262 util_strscpy(result, sizeof(result), event->program_result);
265 while (cpos[0] != '\0' && !isspace(cpos[0]))
267 while (isspace(cpos[0]))
271 err(event->udev, "requested part of result string not found\n");
274 util_strscpy(tmp, sizeof(tmp), cpos);
275 /* %{2+}c copies the whole string from the second part on */
276 if (rest[0] != '+') {
277 cpos = strchr(tmp, ' ');
281 l = util_strpcpy(&s, l, tmp);
282 dbg(event->udev, "substitute part of result string '%s'\n", tmp);
284 l = util_strpcpy(&s, l, event->program_result);
285 dbg(event->udev, "substitute result string '%s'\n", event->program_result);
290 const char *value = NULL;
291 char vbuf[UTIL_NAME_SIZE];
296 err(event->udev, "missing file parameter for attr\n");
300 /* try to read the value specified by "[dmi/id]product_name" */
301 if (util_resolve_subsys_kernel(event->udev, attr, vbuf, sizeof(vbuf), 1) == 0)
304 /* try to read the attribute the device */
306 value = udev_device_get_sysattr_value(event->dev, attr);
308 /* try to read the attribute of the parent device, other matches have selected */
309 if (value == NULL && event->dev_parent != NULL && event->dev_parent != event->dev)
310 value = udev_device_get_sysattr_value(event->dev_parent, attr);
315 /* strip trailing whitespace, and replace unwanted characters */
317 util_strscpy(vbuf, sizeof(vbuf), value);
319 while (len > 0 && isspace(vbuf[--len]))
321 count = util_replace_chars(vbuf, UDEV_ALLOWED_CHARS_INPUT);
323 info(event->udev, "%i character(s) replaced\n" , count);
324 l = util_strpcpy(&s, l, vbuf);
325 dbg(event->udev, "substitute sysfs value '%s'\n", vbuf);
329 struct udev_device *dev_parent;
332 dev_parent = udev_device_get_parent(event->dev);
333 if (dev_parent == NULL)
335 devnode = udev_device_get_devnode(dev_parent);
336 if (devnode != NULL) {
337 size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
339 l = util_strpcpy(&s, l, &devnode[devlen]);
340 dbg(event->udev, "found parent '%s', got node name '%s'\n",
341 udev_device_get_syspath(dev_parent), &devnode[devlen]);
345 case SUBST_TEMP_NODE: {
348 char filename[UTIL_PATH_SIZE];
351 if (event->tmp_node != NULL) {
352 l = util_strpcpy(&s, l, event->tmp_node);
353 dbg(event->udev, "tempnode: return earlier created one\n");
356 devnum = udev_device_get_devnum(dev);
357 if (major(devnum) == 0)
359 /* lookup kernel provided node */
360 if (udev_device_get_knodename(dev) != NULL) {
361 util_strscpyl(filename, sizeof(filename),
362 udev_get_dev_path(event->udev), "/", udev_device_get_knodename(dev), NULL);
363 if (stat(filename, &statbuf) == 0 && statbuf.st_rdev == devnum) {
364 l = util_strpcpy(&s, l, filename);
365 dbg(event->udev, "tempnode: return kernel node\n");
369 /* lookup /dev/{char,block}/<maj>:<min> */
370 if (strcmp(udev_device_get_subsystem(dev), "block") == 0)
374 snprintf(filename, sizeof(filename), "%s/%s/%u:%u",
375 udev_get_dev_path(event->udev), devtype,
376 major(udev_device_get_devnum(dev)),
377 minor(udev_device_get_devnum(dev)));
378 if (stat(filename, &statbuf) == 0 && statbuf.st_rdev == devnum) {
379 l = util_strpcpy(&s, l, filename);
380 dbg(event->udev, "tempnode: return maj:min node\n");
383 /* create temporary node */
384 dbg(event->udev, "tempnode: create temp node\n");
385 asprintf(&event->tmp_node, "%s/.tmp-%s-%u:%u",
386 udev_get_dev_path(event->udev), devtype,
387 major(udev_device_get_devnum(dev)),
388 minor(udev_device_get_devnum(dev)));
389 if (event->tmp_node == NULL)
391 udev_node_mknod(dev, event->tmp_node, 0600, 0, 0);
392 l = util_strpcpy(&s, l, event->tmp_node);
396 if (event->name != NULL) {
397 l = util_strpcpy(&s, l, event->name);
398 dbg(event->udev, "substitute name '%s'\n", event->name);
400 l = util_strpcpy(&s, l, udev_device_get_sysname(dev));
401 dbg(event->udev, "substitute sysname '%s'\n", udev_device_get_sysname(dev));
405 size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
406 struct udev_list_entry *list_entry;
408 list_entry = udev_device_get_devlinks_list_entry(dev);
409 if (list_entry == NULL)
411 l = util_strpcpy(&s, l, &udev_list_entry_get_name(list_entry)[devlen]);
412 udev_list_entry_foreach(list_entry, udev_list_entry_get_next(list_entry))
413 l = util_strpcpyl(&s, l, " ", &udev_list_entry_get_name(list_entry)[devlen], NULL);
417 l = util_strpcpy(&s, l, udev_get_dev_path(event->udev));
418 dbg(event->udev, "substitute udev_root '%s'\n", udev_get_dev_path(event->udev));
421 l = util_strpcpy(&s, l, udev_get_sys_path(event->udev));
422 dbg(event->udev, "substitute sys_path '%s'\n", udev_get_sys_path(event->udev));
426 dbg(event->udev, "missing attribute\n");
431 value = udev_device_get_property_value(event->dev, attr);
434 dbg(event->udev, "substitute env '%s=%s'\n", attr, value);
435 l = util_strpcpy(&s, l, value);
439 err(event->udev, "unknown substitution type=%i\n", type);
446 dbg(event->udev, "'%s' -> '%s' (%zu)\n", src, dest, l);
450 static int spawn_exec(struct udev_event *event,
451 const char *cmd, char *const argv[], char **envp, const sigset_t *sigmask,
452 int fd_stdout, int fd_stderr)
454 struct udev *udev = event->udev;
458 /* discard child output or connect to pipe */
459 fd = open("/dev/null", O_RDWR);
461 dup2(fd, STDIN_FILENO);
463 dup2(fd, STDOUT_FILENO);
465 dup2(fd, STDERR_FILENO);
468 err(udev, "open /dev/null failed: %m\n");
471 /* connect pipes to std{out,err} */
472 if (fd_stdout >= 0) {
473 dup2(fd_stdout, STDOUT_FILENO);
476 if (fd_stderr >= 0) {
477 dup2(fd_stderr, STDERR_FILENO);
481 /* terminate child in case parent goes away */
482 prctl(PR_SET_PDEATHSIG, SIGTERM);
484 /* restore original udev sigmask before exec */
486 sigprocmask(SIG_SETMASK, sigmask, NULL);
488 execve(argv[0], argv, envp);
492 err(udev, "failed to execute '%s' '%s': %m\n", argv[0], cmd);
496 static void spawn_read(struct udev_event *event,
498 int fd_stdout, int fd_stderr,
499 char *result, size_t ressize)
501 struct udev *udev = event->udev;
504 struct epoll_event ep_outpipe, ep_errpipe;
506 /* read from child if requested */
507 if (fd_stdout < 0 && fd_stderr < 0)
510 fd_ep = epoll_create1(EPOLL_CLOEXEC);
512 err(udev, "error creating epoll fd: %m\n");
516 if (fd_stdout >= 0) {
517 memset(&ep_outpipe, 0, sizeof(struct epoll_event));
518 ep_outpipe.events = EPOLLIN;
519 ep_outpipe.data.ptr = &fd_stdout;
520 if (epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_stdout, &ep_outpipe) < 0) {
521 err(udev, "fail to add fd to epoll: %m\n");
526 if (fd_stderr >= 0) {
527 memset(&ep_errpipe, 0, sizeof(struct epoll_event));
528 ep_errpipe.events = EPOLLIN;
529 ep_errpipe.data.ptr = &fd_stderr;
530 if (epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_stderr, &ep_errpipe) < 0) {
531 err(udev, "fail to add fd to epoll: %m\n");
536 /* read child output */
537 while (fd_stdout >= 0 || fd_stderr >= 0) {
540 struct epoll_event ev[4];
543 if (event->timeout_usec > 0) {
544 unsigned long long age_usec;
546 age_usec = now_usec() - event->birth_usec;
547 if (age_usec >= event->timeout_usec) {
548 err(udev, "timeout '%s'\n", cmd);
551 timeout = ((event->timeout_usec - age_usec) / 1000) + 1000;
556 fdcount = epoll_wait(fd_ep, ev, ARRAY_SIZE(ev), timeout);
560 err(udev, "failed to poll: %m\n");
564 err(udev, "timeout '%s'\n", cmd);
568 for (i = 0; i < fdcount; i++) {
569 int *fd = (int *)ev[i].data.ptr;
571 if (ev[i].events & EPOLLIN) {
575 count = read(*fd, buf, sizeof(buf)-1);
580 /* store stdout result */
581 if (result != NULL && *fd == fd_stdout) {
582 if (respos + count < ressize) {
583 memcpy(&result[respos], buf, count);
586 err(udev, "'%s' ressize %zd too short\n", cmd, ressize);
590 /* log debug output only if we watch stderr */
591 if (fd_stderr >= 0) {
596 while ((line = strsep(&pos, "\n"))) {
597 if (pos != NULL || line[0] != '\0')
598 info(udev, "'%s'(%s) '%s'\n", cmd, *fd == fd_stdout ? "out" : "err" , line);
601 } else if (ev[i].events & EPOLLHUP) {
602 if (epoll_ctl(fd_ep, EPOLL_CTL_DEL, *fd, NULL) < 0) {
603 err(udev, "failed to remove fd from epoll: %m\n");
611 /* return the child's stdout string */
612 if (result != NULL) {
613 result[respos] = '\0';
614 dbg(udev, "result='%s'\n", result);
621 static int spawn_wait(struct udev_event *event, const char *cmd, pid_t pid)
623 struct udev *udev = event->udev;
624 struct pollfd pfd[1];
627 pfd[0].events = POLLIN;
628 pfd[0].fd = event->fd_signal;
634 if (event->timeout_usec > 0) {
635 unsigned long long age_usec;
637 age_usec = now_usec() - event->birth_usec;
638 if (age_usec >= event->timeout_usec)
641 timeout = ((event->timeout_usec - age_usec) / 1000) + 1000;
646 fdcount = poll(pfd, 1, timeout);
651 err(udev, "failed to poll: %m\n");
655 err(udev, "timeout: killing '%s' [%u]\n", cmd, pid);
659 if (pfd[0].revents & POLLIN) {
660 struct signalfd_siginfo fdsi;
664 size = read(event->fd_signal, &fdsi, sizeof(struct signalfd_siginfo));
665 if (size != sizeof(struct signalfd_siginfo))
668 switch (fdsi.ssi_signo) {
670 event->sigterm = true;
673 if (waitpid(pid, &status, WNOHANG) < 0)
675 if (WIFEXITED(status)) {
676 info(udev, "'%s' [%u] exit with return code %i\n", cmd, pid, WEXITSTATUS(status));
677 if (WEXITSTATUS(status) != 0)
679 } else if (WIFSIGNALED(status)) {
680 err(udev, "'%s' [%u] terminated by signal %i (%s)\n", cmd, pid, WTERMSIG(status), strsignal(WTERMSIG(status)));
682 } else if (WIFSTOPPED(status)) {
683 err(udev, "'%s' [%u] stopped\n", cmd, pid);
685 } else if (WIFCONTINUED(status)) {
686 err(udev, "'%s' [%u] continued\n", cmd, pid);
689 err(udev, "'%s' [%u] exit with status 0x%04x\n", cmd, pid, status);
701 int udev_build_argv(struct udev *udev, char *cmd, int *argc, char *argv[])
706 if (strchr(cmd, ' ') == NULL) {
712 while (pos != NULL && pos[0] != '\0') {
713 if (pos[0] == '\'') {
714 /* do not separate quotes */
716 argv[i] = strsep(&pos, "\'");
718 while (pos[0] == ' ')
721 argv[i] = strsep(&pos, " ");
723 while (pos[0] == ' ')
726 dbg(udev, "argv[%i] '%s'\n", i, argv[i]);
736 int udev_event_spawn(struct udev_event *event,
737 const char *cmd, char **envp, const sigset_t *sigmask,
738 char *result, size_t ressize)
740 struct udev *udev = event->udev;
741 int outpipe[2] = {-1, -1};
742 int errpipe[2] = {-1, -1};
744 char arg[UTIL_PATH_SIZE];
746 char program[UTIL_PATH_SIZE];
749 util_strscpy(arg, sizeof(arg), cmd);
750 udev_build_argv(event->udev, arg, NULL, argv);
752 /* pipes from child to parent */
753 if (result != NULL || udev_get_log_priority(udev) >= LOG_INFO) {
754 if (pipe2(outpipe, O_NONBLOCK) != 0) {
756 err(udev, "pipe failed: %m\n");
760 if (udev_get_log_priority(udev) >= LOG_INFO) {
761 if (pipe2(errpipe, O_NONBLOCK) != 0) {
763 err(udev, "pipe failed: %m\n");
768 /* allow programs in /usr/lib/udev/ to be called without the path */
769 if (argv[0][0] != '/') {
770 util_strscpyl(program, sizeof(program), LIBEXECDIR "/", argv[0], NULL);
777 /* child closes parent's ends of pipes */
778 if (outpipe[READ_END] >= 0) {
779 close(outpipe[READ_END]);
780 outpipe[READ_END] = -1;
782 if (errpipe[READ_END] >= 0) {
783 close(errpipe[READ_END]);
784 errpipe[READ_END] = -1;
787 info(udev, "starting '%s'\n", cmd);
789 err = spawn_exec(event, cmd, argv, envp, sigmask,
790 outpipe[WRITE_END], errpipe[WRITE_END]);
794 err(udev, "fork of '%s' failed: %m\n", cmd);
798 /* parent closed child's ends of pipes */
799 if (outpipe[WRITE_END] >= 0) {
800 close(outpipe[WRITE_END]);
801 outpipe[WRITE_END] = -1;
803 if (errpipe[WRITE_END] >= 0) {
804 close(errpipe[WRITE_END]);
805 errpipe[WRITE_END] = -1;
808 spawn_read(event, cmd,
809 outpipe[READ_END], errpipe[READ_END],
812 err = spawn_wait(event, cmd, pid);
816 if (outpipe[READ_END] >= 0)
817 close(outpipe[READ_END]);
818 if (outpipe[WRITE_END] >= 0)
819 close(outpipe[WRITE_END]);
820 if (errpipe[READ_END] >= 0)
821 close(errpipe[READ_END]);
822 if (errpipe[WRITE_END] >= 0)
823 close(errpipe[WRITE_END]);
827 static void rename_netif_kernel_log(struct ifreq ifr)
832 klog = open("/dev/kmsg", O_WRONLY);
836 f = fdopen(klog, "w");
842 fprintf(f, "<30>udevd[%u]: renamed network interface %s to %s\n",
843 getpid(), ifr.ifr_name, ifr.ifr_newname);
847 static int rename_netif(struct udev_event *event)
849 struct udev_device *dev = event->dev;
855 info(event->udev, "changing net interface name from '%s' to '%s'\n",
856 udev_device_get_sysname(dev), event->name);
858 sk = socket(PF_INET, SOCK_DGRAM, 0);
861 err(event->udev, "error opening socket: %m\n");
865 memset(&ifr, 0x00, sizeof(struct ifreq));
866 util_strscpy(ifr.ifr_name, IFNAMSIZ, udev_device_get_sysname(dev));
867 util_strscpy(ifr.ifr_newname, IFNAMSIZ, event->name);
868 err = ioctl(sk, SIOCSIFNAME, &ifr);
870 rename_netif_kernel_log(ifr);
874 /* keep trying if the destination interface name already exists */
879 /* free our own name, another process may wait for us */
880 snprintf(ifr.ifr_newname, IFNAMSIZ, "rename%u", udev_device_get_ifindex(dev));
881 err = ioctl(sk, SIOCSIFNAME, &ifr);
887 /* log temporary name */
888 rename_netif_kernel_log(ifr);
890 /* wait a maximum of 90 seconds for our target to become available */
891 util_strscpy(ifr.ifr_name, IFNAMSIZ, ifr.ifr_newname);
892 util_strscpy(ifr.ifr_newname, IFNAMSIZ, event->name);
895 const struct timespec duration = { 0, 1000 * 1000 * 1000 / 20 };
897 dbg(event->udev, "wait for netif '%s' to become free, loop=%i\n",
898 event->name, (90 * 20) - loop);
899 nanosleep(&duration, NULL);
901 err = ioctl(sk, SIOCSIFNAME, &ifr);
903 rename_netif_kernel_log(ifr);
913 err(event->udev, "error changing net interface name %s to %s: %m\n", ifr.ifr_name, ifr.ifr_newname);
918 int udev_event_execute_rules(struct udev_event *event, struct udev_rules *rules, const sigset_t *sigmask)
920 struct udev_device *dev = event->dev;
923 if (udev_device_get_subsystem(dev) == NULL)
926 if (strcmp(udev_device_get_action(dev), "remove") == 0) {
927 udev_device_read_db(dev, NULL);
928 udev_device_delete_db(dev);
929 udev_device_tag_index(dev, NULL, false);
931 if (major(udev_device_get_devnum(dev)) != 0)
932 udev_watch_end(event->udev, dev);
934 udev_rules_apply_to_event(rules, event, sigmask);
936 if (major(udev_device_get_devnum(dev)) != 0)
937 err = udev_node_remove(dev);
939 event->dev_db = udev_device_new_from_syspath(event->udev, udev_device_get_syspath(dev));
940 if (event->dev_db != NULL) {
941 udev_device_read_db(event->dev_db, NULL);
942 udev_device_set_info_loaded(event->dev_db);
944 /* disable watch during event processing */
945 if (major(udev_device_get_devnum(dev)) != 0)
946 udev_watch_end(event->udev, event->dev_db);
949 udev_rules_apply_to_event(rules, event, sigmask);
951 /* rename a new network interface, if needed */
952 if (udev_device_get_ifindex(dev) > 0 && strcmp(udev_device_get_action(dev), "add") == 0 &&
953 event->name != NULL && strcmp(event->name, udev_device_get_sysname(dev)) != 0) {
954 char syspath[UTIL_PATH_SIZE];
957 err = rename_netif(event);
959 info(event->udev, "renamed netif to '%s'\n", event->name);
961 /* remember old name */
962 udev_device_add_property(dev, "INTERFACE_OLD", udev_device_get_sysname(dev));
964 /* now change the devpath, because the kernel device name has changed */
965 util_strscpy(syspath, sizeof(syspath), udev_device_get_syspath(dev));
966 pos = strrchr(syspath, '/');
969 util_strscpy(pos, sizeof(syspath) - (pos - syspath), event->name);
970 udev_device_set_syspath(event->dev, syspath);
971 udev_device_add_property(dev, "INTERFACE", udev_device_get_sysname(dev));
972 info(event->udev, "changed devpath to '%s'\n", udev_device_get_devpath(dev));
977 if (major(udev_device_get_devnum(dev)) != 0) {
978 char filename[UTIL_PATH_SIZE];
980 if (event->tmp_node != NULL) {
981 info(event->udev, "cleanup temporary device node\n");
982 util_unlink_secure(event->udev, event->tmp_node);
983 free(event->tmp_node);
984 event->tmp_node = NULL;
987 /* no rule, use kernel provided name */
988 if (event->name == NULL) {
989 if (udev_device_get_knodename(dev) != NULL) {
990 event->name = strdup(udev_device_get_knodename(dev));
991 info(event->udev, "no node name set, will use kernel supplied name '%s'\n", event->name);
993 event->name = strdup(udev_device_get_sysname(event->dev));
994 info(event->udev, "no node name set, will use device name '%s'\n", event->name);
998 if (event->name == NULL || event->name[0] == '\0') {
999 udev_device_delete_db(dev);
1000 udev_device_tag_index(dev, NULL, false);
1001 udev_device_unref(event->dev_db);
1003 err(event->udev, "no node name, something went wrong, ignoring\n");
1007 if (udev_device_get_knodename(dev) != NULL && strcmp(udev_device_get_knodename(dev), event->name) != 0)
1008 err(event->udev, "kernel-provided name '%s' and NAME= '%s' disagree, "
1009 "please use SYMLINK+= or change the kernel to provide the proper name\n",
1010 udev_device_get_knodename(dev), event->name);
1012 /* set device node name */
1013 util_strscpyl(filename, sizeof(filename), udev_get_dev_path(event->udev), "/", event->name, NULL);
1014 udev_device_set_devnode(dev, filename);
1016 /* remove/update possible left-over symlinks from old database entry */
1017 if (event->dev_db != NULL)
1018 udev_node_update_old_links(dev, event->dev_db);
1020 if (!event->mode_set) {
1021 if (udev_device_get_devnode_mode(dev) > 0) {
1022 /* kernel supplied value */
1023 event->mode = udev_device_get_devnode_mode(dev);
1024 } else if (event->gid > 0) {
1025 /* default 0660 if a group is assigned */
1033 /* set sticky bit, so we do not remove the node on module unload */
1034 if (event->static_node)
1035 event->mode |= 01000;
1037 err = udev_node_add(dev, event->mode, event->uid, event->gid);
1040 /* preserve old, or get new initialization timestamp */
1041 if (event->dev_db != NULL && udev_device_get_usec_initialized(event->dev_db) > 0)
1042 udev_device_set_usec_initialized(event->dev, udev_device_get_usec_initialized(event->dev_db));
1043 else if (udev_device_get_usec_initialized(event->dev) == 0)
1044 udev_device_set_usec_initialized(event->dev, now_usec());
1046 /* (re)write database file */
1047 udev_device_update_db(dev);
1048 udev_device_tag_index(dev, event->dev_db, true);
1049 udev_device_set_is_initialized(dev);
1051 udev_device_unref(event->dev_db);
1052 event->dev_db = NULL;
1058 int udev_event_execute_run(struct udev_event *event, const sigset_t *sigmask)
1060 struct udev_list_entry *list_entry;
1063 dbg(event->udev, "executing run list\n");
1064 udev_list_entry_foreach(list_entry, udev_list_get_entry(&event->run_list)) {
1065 const char *cmd = udev_list_entry_get_name(list_entry);
1067 if (strncmp(cmd, "socket:", strlen("socket:")) == 0) {
1068 struct udev_monitor *monitor;
1070 monitor = udev_monitor_new_from_socket(event->udev, &cmd[strlen("socket:")]);
1071 if (monitor == NULL)
1073 udev_monitor_send_device(monitor, NULL, event->dev);
1074 udev_monitor_unref(monitor);
1076 char program[UTIL_PATH_SIZE];
1079 if (event->exec_delay > 0) {
1080 info(event->udev, "delay execution of '%s'\n", program);
1081 sleep(event->exec_delay);
1084 udev_event_apply_format(event, cmd, program, sizeof(program));
1085 envp = udev_device_get_properties_envp(event->dev);
1086 if (udev_event_spawn(event, program, envp, sigmask, NULL, 0) < 0) {
1087 if (udev_list_entry_get_num(list_entry))