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_event *event;
43 event = calloc(1, sizeof(struct udev_event));
47 event->udev = udev_device_get_udev(dev);
48 udev_list_init(&event->run_list);
49 event->fd_signal = -1;
50 event->birth_usec = now_usec();
51 event->timeout_usec = 60 * 1000 * 1000;
52 dbg(event->udev, "allocated event %p\n", event);
56 void udev_event_unref(struct udev_event *event)
60 udev_list_cleanup_entries(event->udev, &event->run_list);
61 free(event->tmp_node);
62 free(event->program_result);
64 dbg(event->udev, "free event %p\n", event);
68 size_t udev_event_apply_format(struct udev_event *event, const char *src, char *dest, size_t size)
70 struct udev_device *dev = event->dev;
90 static const struct subst_map {
95 { .name = "tempnode", .fmt = 'N', .type = SUBST_TEMP_NODE },
96 { .name = "attr", .fmt = 's', .type = SUBST_ATTR },
97 { .name = "sysfs", .fmt = 's', .type = SUBST_ATTR },
98 { .name = "env", .fmt = 'E', .type = SUBST_ENV },
99 { .name = "kernel", .fmt = 'k', .type = SUBST_KERNEL },
100 { .name = "number", .fmt = 'n', .type = SUBST_KERNEL_NUMBER },
101 { .name = "driver", .fmt = 'd', .type = SUBST_DRIVER },
102 { .name = "devpath", .fmt = 'p', .type = SUBST_DEVPATH },
103 { .name = "id", .fmt = 'b', .type = SUBST_ID },
104 { .name = "major", .fmt = 'M', .type = SUBST_MAJOR },
105 { .name = "minor", .fmt = 'm', .type = SUBST_MINOR },
106 { .name = "result", .fmt = 'c', .type = SUBST_RESULT },
107 { .name = "parent", .fmt = 'P', .type = SUBST_PARENT },
108 { .name = "name", .fmt = 'D', .type = SUBST_NAME },
109 { .name = "links", .fmt = 'L', .type = SUBST_LINKS },
110 { .name = "root", .fmt = 'r', .type = SUBST_ROOT },
111 { .name = "sys", .fmt = 'S', .type = SUBST_SYS },
122 enum subst_type type = SUBST_UNKNOWN;
123 char attrbuf[UTIL_PATH_SIZE];
126 while (from[0] != '\0') {
127 if (from[0] == '$') {
128 /* substitute named variable */
131 if (from[1] == '$') {
136 for (i = 0; i < ARRAY_SIZE(map); i++) {
137 if (strncmp(&from[1], map[i].name, strlen(map[i].name)) == 0) {
139 from += strlen(map[i].name)+1;
140 dbg(event->udev, "will substitute format name '%s'\n", map[i].name);
144 } else if (from[0] == '%') {
145 /* substitute format char */
148 if (from[1] == '%') {
153 for (i = 0; i < ARRAY_SIZE(map); i++) {
154 if (from[1] == map[i].fmt) {
157 dbg(event->udev, "will substitute format char '%c'\n", map[i].fmt);
174 /* extract possible $format{attr} */
175 if (from[0] == '{') {
179 for (i = 0; from[i] != '}'; i++) {
180 if (from[i] == '\0') {
181 err(event->udev, "missing closing brace for format '%s'\n", src);
185 if (i >= sizeof(attrbuf))
187 memcpy(attrbuf, from, i);
197 l = util_strpcpy(&s, l, udev_device_get_devpath(dev));
198 dbg(event->udev, "substitute devpath '%s'\n", udev_device_get_devpath(dev));
201 l = util_strpcpy(&s, l, udev_device_get_sysname(dev));
202 dbg(event->udev, "substitute kernel name '%s'\n", udev_device_get_sysname(dev));
204 case SUBST_KERNEL_NUMBER:
205 if (udev_device_get_sysnum(dev) == NULL)
207 l = util_strpcpy(&s, l, udev_device_get_sysnum(dev));
208 dbg(event->udev, "substitute kernel number '%s'\n", udev_device_get_sysnum(dev));
211 if (event->dev_parent == NULL)
213 l = util_strpcpy(&s, l, udev_device_get_sysname(event->dev_parent));
214 dbg(event->udev, "substitute id '%s'\n", udev_device_get_sysname(event->dev_parent));
219 if (event->dev_parent == NULL)
222 driver = udev_device_get_driver(event->dev_parent);
225 l = util_strpcpy(&s, l, driver);
226 dbg(event->udev, "substitute driver '%s'\n", driver);
230 char num[UTIL_PATH_SIZE];
232 sprintf(num, "%d", major(udev_device_get_devnum(dev)));
233 l = util_strpcpy(&s, l, num);
234 dbg(event->udev, "substitute major number '%s'\n", num);
238 char num[UTIL_PATH_SIZE];
240 sprintf(num, "%d", minor(udev_device_get_devnum(dev)));
241 l = util_strpcpy(&s, l, num);
242 dbg(event->udev, "substitute minor number '%s'\n", num);
249 if (event->program_result == NULL)
251 /* get part part of the result string */
254 i = strtoul(attr, &rest, 10);
256 char result[UTIL_PATH_SIZE];
257 char tmp[UTIL_PATH_SIZE];
260 dbg(event->udev, "request part #%d of result string\n", i);
261 util_strscpy(result, sizeof(result), event->program_result);
264 while (cpos[0] != '\0' && !isspace(cpos[0]))
266 while (isspace(cpos[0]))
270 err(event->udev, "requested part of result string not found\n");
273 util_strscpy(tmp, sizeof(tmp), cpos);
274 /* %{2+}c copies the whole string from the second part on */
275 if (rest[0] != '+') {
276 cpos = strchr(tmp, ' ');
280 l = util_strpcpy(&s, l, tmp);
281 dbg(event->udev, "substitute part of result string '%s'\n", tmp);
283 l = util_strpcpy(&s, l, event->program_result);
284 dbg(event->udev, "substitute result string '%s'\n", event->program_result);
289 const char *value = NULL;
290 char vbuf[UTIL_NAME_SIZE];
295 err(event->udev, "missing file parameter for attr\n");
299 /* try to read the value specified by "[dmi/id]product_name" */
300 if (util_resolve_subsys_kernel(event->udev, attr, vbuf, sizeof(vbuf), 1) == 0)
303 /* try to read the attribute the device */
305 value = udev_device_get_sysattr_value(event->dev, attr);
307 /* try to read the attribute of the parent device, other matches have selected */
308 if (value == NULL && event->dev_parent != NULL && event->dev_parent != event->dev)
309 value = udev_device_get_sysattr_value(event->dev_parent, attr);
314 /* strip trailing whitespace, and replace unwanted characters */
316 util_strscpy(vbuf, sizeof(vbuf), value);
318 while (len > 0 && isspace(vbuf[--len]))
320 count = udev_util_replace_chars(vbuf, UDEV_ALLOWED_CHARS_INPUT);
322 info(event->udev, "%i character(s) replaced\n" , count);
323 l = util_strpcpy(&s, l, vbuf);
324 dbg(event->udev, "substitute sysfs value '%s'\n", vbuf);
328 struct udev_device *dev_parent;
331 dev_parent = udev_device_get_parent(event->dev);
332 if (dev_parent == NULL)
334 devnode = udev_device_get_devnode(dev_parent);
335 if (devnode != NULL) {
336 size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
338 l = util_strpcpy(&s, l, &devnode[devlen]);
339 dbg(event->udev, "found parent '%s', got node name '%s'\n",
340 udev_device_get_syspath(dev_parent), &devnode[devlen]);
344 case SUBST_TEMP_NODE: {
347 char filename[UTIL_PATH_SIZE];
350 if (event->tmp_node != NULL) {
351 l = util_strpcpy(&s, l, event->tmp_node);
352 dbg(event->udev, "tempnode: return earlier created one\n");
355 devnum = udev_device_get_devnum(dev);
356 if (major(devnum) == 0)
358 /* lookup kernel provided node */
359 if (udev_device_get_knodename(dev) != NULL) {
360 util_strscpyl(filename, sizeof(filename),
361 udev_get_dev_path(event->udev), "/", udev_device_get_knodename(dev), NULL);
362 if (stat(filename, &statbuf) == 0 && statbuf.st_rdev == devnum) {
363 l = util_strpcpy(&s, l, filename);
364 dbg(event->udev, "tempnode: return kernel node\n");
368 /* lookup /dev/{char,block}/<maj>:<min> */
369 if (strcmp(udev_device_get_subsystem(dev), "block") == 0)
373 snprintf(filename, sizeof(filename), "%s/%s/%u:%u",
374 udev_get_dev_path(event->udev), devtype,
375 major(udev_device_get_devnum(dev)),
376 minor(udev_device_get_devnum(dev)));
377 if (stat(filename, &statbuf) == 0 && statbuf.st_rdev == devnum) {
378 l = util_strpcpy(&s, l, filename);
379 dbg(event->udev, "tempnode: return maj:min node\n");
382 /* create temporary node */
383 dbg(event->udev, "tempnode: create temp node\n");
384 asprintf(&event->tmp_node, "%s/.tmp-%s-%u:%u",
385 udev_get_dev_path(event->udev), devtype,
386 major(udev_device_get_devnum(dev)),
387 minor(udev_device_get_devnum(dev)));
388 if (event->tmp_node == NULL)
390 udev_node_mknod(dev, event->tmp_node, 0600, 0, 0);
391 l = util_strpcpy(&s, l, event->tmp_node);
395 if (event->name != NULL) {
396 l = util_strpcpy(&s, l, event->name);
397 dbg(event->udev, "substitute name '%s'\n", event->name);
399 l = util_strpcpy(&s, l, udev_device_get_sysname(dev));
400 dbg(event->udev, "substitute sysname '%s'\n", udev_device_get_sysname(dev));
404 size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
405 struct udev_list_entry *list_entry;
407 list_entry = udev_device_get_devlinks_list_entry(dev);
408 if (list_entry == NULL)
410 l = util_strpcpy(&s, l, &udev_list_entry_get_name(list_entry)[devlen]);
411 udev_list_entry_foreach(list_entry, udev_list_entry_get_next(list_entry))
412 l = util_strpcpyl(&s, l, " ", &udev_list_entry_get_name(list_entry)[devlen], NULL);
416 l = util_strpcpy(&s, l, udev_get_dev_path(event->udev));
417 dbg(event->udev, "substitute udev_root '%s'\n", udev_get_dev_path(event->udev));
420 l = util_strpcpy(&s, l, udev_get_sys_path(event->udev));
421 dbg(event->udev, "substitute sys_path '%s'\n", udev_get_sys_path(event->udev));
425 dbg(event->udev, "missing attribute\n");
430 value = udev_device_get_property_value(event->dev, attr);
433 dbg(event->udev, "substitute env '%s=%s'\n", attr, value);
434 l = util_strpcpy(&s, l, value);
438 err(event->udev, "unknown substitution type=%i\n", type);
445 dbg(event->udev, "'%s' -> '%s' (%zu)\n", src, dest, l);
449 static int spawn_exec(struct udev_event *event,
450 const char *cmd, char *const argv[], char **envp, const sigset_t *sigmask,
451 int fd_stdout, int fd_stderr)
453 struct udev *udev = event->udev;
457 /* discard child output or connect to pipe */
458 fd = open("/dev/null", O_RDWR);
460 dup2(fd, STDIN_FILENO);
462 dup2(fd, STDOUT_FILENO);
464 dup2(fd, STDERR_FILENO);
467 err(udev, "open /dev/null failed: %m\n");
470 /* connect pipes to std{out,err} */
471 if (fd_stdout >= 0) {
472 dup2(fd_stdout, STDOUT_FILENO);
475 if (fd_stderr >= 0) {
476 dup2(fd_stderr, STDERR_FILENO);
480 /* terminate child in case parent goes away */
481 prctl(PR_SET_PDEATHSIG, SIGTERM);
483 /* restore original udev sigmask before exec */
485 sigprocmask(SIG_SETMASK, sigmask, NULL);
487 execve(argv[0], argv, envp);
491 err(udev, "failed to execute '%s' '%s': %m\n", argv[0], cmd);
495 static int spawn_read(struct udev_event *event,
497 int fd_stdout, int fd_stderr,
498 char *result, size_t ressize)
500 struct udev *udev = event->udev;
503 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);
513 err(udev, "error creating epoll fd: %m\n");
517 if (fd_stdout >= 0) {
518 memset(&ep_outpipe, 0, sizeof(struct epoll_event));
519 ep_outpipe.events = EPOLLIN;
520 ep_outpipe.data.ptr = &fd_stdout;
521 if (epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_stdout, &ep_outpipe) < 0) {
522 err(udev, "fail to add fd to epoll: %m\n");
527 if (fd_stderr >= 0) {
528 memset(&ep_errpipe, 0, sizeof(struct epoll_event));
529 ep_errpipe.events = EPOLLIN;
530 ep_errpipe.data.ptr = &fd_stderr;
531 if (epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_stderr, &ep_errpipe) < 0) {
532 err(udev, "fail to add fd to epoll: %m\n");
537 /* read child output */
538 while (fd_stdout >= 0 || fd_stderr >= 0) {
541 struct epoll_event ev[4];
544 if (event->timeout_usec > 0) {
545 unsigned long long age_usec;
547 age_usec = now_usec() - event->birth_usec;
548 if (age_usec >= event->timeout_usec) {
550 err(udev, "timeout '%s'\n", cmd);
553 timeout = ((event->timeout_usec - age_usec) / 1000) + 1000;
558 fdcount = epoll_wait(fd_ep, ev, ARRAY_SIZE(ev), timeout);
563 err(udev, "failed to poll: %m\n");
568 err(udev, "timeout '%s'\n", cmd);
572 for (i = 0; i < fdcount; i++) {
573 int *fd = (int *)ev[i].data.ptr;
575 if (ev[i].events & EPOLLIN) {
579 count = read(*fd, buf, sizeof(buf)-1);
584 /* store stdout result */
585 if (result != NULL && *fd == fd_stdout) {
586 if (respos + count < ressize) {
587 memcpy(&result[respos], buf, count);
590 err(udev, "'%s' ressize %zd too short\n", cmd, ressize);
595 /* log debug output only if we watch stderr */
596 if (fd_stderr >= 0) {
601 while ((line = strsep(&pos, "\n"))) {
602 if (pos != NULL || line[0] != '\0')
603 info(udev, "'%s'(%s) '%s'\n", cmd, *fd == fd_stdout ? "out" : "err" , line);
606 } else if (ev[i].events & EPOLLHUP) {
607 if (epoll_ctl(fd_ep, EPOLL_CTL_DEL, *fd, NULL) < 0) {
609 err(udev, "failed to remove fd from epoll: %m\n");
617 /* return the child's stdout string */
618 if (result != NULL) {
619 result[respos] = '\0';
620 dbg(udev, "result='%s'\n", result);
628 static int spawn_wait(struct udev_event *event, const char *cmd, pid_t pid)
630 struct udev *udev = event->udev;
631 struct pollfd pfd[1];
634 pfd[0].events = POLLIN;
635 pfd[0].fd = event->fd_signal;
641 if (event->timeout_usec > 0) {
642 unsigned long long age_usec;
644 age_usec = now_usec() - event->birth_usec;
645 if (age_usec >= event->timeout_usec)
648 timeout = ((event->timeout_usec - age_usec) / 1000) + 1000;
653 fdcount = poll(pfd, 1, timeout);
658 err(udev, "failed to poll: %m\n");
662 err(udev, "timeout: killing '%s' [%u]\n", cmd, pid);
666 if (pfd[0].revents & POLLIN) {
667 struct signalfd_siginfo fdsi;
671 size = read(event->fd_signal, &fdsi, sizeof(struct signalfd_siginfo));
672 if (size != sizeof(struct signalfd_siginfo))
675 switch (fdsi.ssi_signo) {
677 event->sigterm = true;
680 if (waitpid(pid, &status, WNOHANG) < 0)
682 if (WIFEXITED(status)) {
683 info(udev, "'%s' [%u] exit with return code %i\n", cmd, pid, WEXITSTATUS(status));
684 if (WEXITSTATUS(status) != 0)
686 } else if (WIFSIGNALED(status)) {
687 err(udev, "'%s' [%u] terminated by signal %i (%s)\n", cmd, pid, WTERMSIG(status), strsignal(WTERMSIG(status)));
689 } else if (WIFSTOPPED(status)) {
690 err(udev, "'%s' [%u] stopped\n", cmd, pid);
692 } else if (WIFCONTINUED(status)) {
693 err(udev, "'%s' [%u] continued\n", cmd, pid);
696 err(udev, "'%s' [%u] exit with status 0x%04x\n", cmd, pid, status);
708 int udev_event_spawn(struct udev_event *event,
709 const char *cmd, char **envp, const sigset_t *sigmask,
710 char *result, size_t ressize)
712 struct udev *udev = event->udev;
713 int outpipe[2] = {-1, -1};
714 int errpipe[2] = {-1, -1};
716 char arg[UTIL_PATH_SIZE];
717 char program[UTIL_PATH_SIZE];
718 char *argv[((sizeof(arg) + 1) / 2) + 1];
722 /* build argv from command */
723 util_strscpy(arg, sizeof(arg), cmd);
725 if (strchr(arg, ' ') != NULL) {
728 while (pos != NULL && pos[0] != '\0') {
729 if (pos[0] == '\'') {
730 /* do not separate quotes */
732 argv[i] = strsep(&pos, "\'");
734 while (pos[0] == ' ')
737 argv[i] = strsep(&pos, " ");
739 while (pos[0] == ' ')
742 dbg(udev, "arg[%i] '%s'\n", i, argv[i]);
751 /* pipes from child to parent */
752 if (result != NULL || udev_get_log_priority(udev) >= LOG_INFO) {
753 if (pipe2(outpipe, O_NONBLOCK) != 0) {
755 err(udev, "pipe failed: %m\n");
759 if (udev_get_log_priority(udev) >= LOG_INFO) {
760 if (pipe2(errpipe, O_NONBLOCK) != 0) {
762 err(udev, "pipe failed: %m\n");
767 /* allow programs in /lib/udev/ to be called without the path */
768 if (argv[0][0] != '/') {
769 util_strscpyl(program, sizeof(program), LIBEXECDIR "/", argv[0], NULL);
776 /* child closes parent's ends of pipes */
777 if (outpipe[READ_END] >= 0) {
778 close(outpipe[READ_END]);
779 outpipe[READ_END] = -1;
781 if (errpipe[READ_END] >= 0) {
782 close(errpipe[READ_END]);
783 errpipe[READ_END] = -1;
786 info(udev, "starting '%s'\n", cmd);
788 err = spawn_exec(event, cmd, argv, envp, sigmask,
789 outpipe[WRITE_END], errpipe[WRITE_END]);
793 err(udev, "fork of '%s' failed: %m\n", cmd);
797 /* parent closed child's ends of pipes */
798 if (outpipe[WRITE_END] >= 0) {
799 close(outpipe[WRITE_END]);
800 outpipe[WRITE_END] = -1;
802 if (errpipe[WRITE_END] >= 0) {
803 close(errpipe[WRITE_END]);
804 errpipe[WRITE_END] = -1;
807 err = spawn_read(event, cmd,
808 outpipe[READ_END], errpipe[READ_END],
811 err = spawn_wait(event, cmd, pid);
815 if (outpipe[READ_END] >= 0)
816 close(outpipe[READ_END]);
817 if (outpipe[WRITE_END] >= 0)
818 close(outpipe[WRITE_END]);
819 if (errpipe[READ_END] >= 0)
820 close(errpipe[READ_END]);
821 if (errpipe[WRITE_END] >= 0)
822 close(errpipe[WRITE_END]);
826 static void rename_netif_kernel_log(struct ifreq ifr)
831 klog = open("/dev/kmsg", O_WRONLY);
835 f = fdopen(klog, "w");
841 fprintf(f, "<30>udevd[%u]: renamed network interface %s to %s\n",
842 getpid(), ifr.ifr_name, ifr.ifr_newname);
846 static int rename_netif(struct udev_event *event)
848 struct udev_device *dev = event->dev;
854 info(event->udev, "changing net interface name from '%s' to '%s'\n",
855 udev_device_get_sysname(dev), event->name);
857 sk = socket(PF_INET, SOCK_DGRAM, 0);
860 err(event->udev, "error opening socket: %m\n");
864 memset(&ifr, 0x00, sizeof(struct ifreq));
865 util_strscpy(ifr.ifr_name, IFNAMSIZ, udev_device_get_sysname(dev));
866 util_strscpy(ifr.ifr_newname, IFNAMSIZ, event->name);
867 err = ioctl(sk, SIOCSIFNAME, &ifr);
869 rename_netif_kernel_log(ifr);
873 /* keep trying if the destination interface name already exists */
878 /* free our own name, another process may wait for us */
879 snprintf(ifr.ifr_newname, IFNAMSIZ, "rename%u", udev_device_get_ifindex(dev));
880 err = ioctl(sk, SIOCSIFNAME, &ifr);
886 /* log temporary name */
887 rename_netif_kernel_log(ifr);
889 /* wait a maximum of 90 seconds for our target to become available */
890 util_strscpy(ifr.ifr_name, IFNAMSIZ, ifr.ifr_newname);
891 util_strscpy(ifr.ifr_newname, IFNAMSIZ, event->name);
894 const struct timespec duration = { 0, 1000 * 1000 * 1000 / 20 };
896 dbg(event->udev, "wait for netif '%s' to become free, loop=%i\n",
897 event->name, (90 * 20) - loop);
898 nanosleep(&duration, NULL);
900 err = ioctl(sk, SIOCSIFNAME, &ifr);
902 rename_netif_kernel_log(ifr);
912 err(event->udev, "error changing net interface name %s to %s: %m\n", ifr.ifr_name, ifr.ifr_newname);
917 int udev_event_execute_rules(struct udev_event *event, struct udev_rules *rules, const sigset_t *sigmask)
919 struct udev_device *dev = event->dev;
922 if (udev_device_get_subsystem(dev) == NULL)
925 if (strcmp(udev_device_get_action(dev), "remove") == 0) {
926 udev_device_read_db(dev, NULL);
927 udev_device_delete_db(dev);
928 udev_device_tag_index(dev, NULL, false);
930 if (major(udev_device_get_devnum(dev)) != 0)
931 udev_watch_end(event->udev, dev);
933 udev_rules_apply_to_event(rules, event, sigmask);
935 if (major(udev_device_get_devnum(dev)) != 0)
936 err = udev_node_remove(dev);
938 event->dev_db = udev_device_new_from_syspath(event->udev, udev_device_get_syspath(dev));
939 if (event->dev_db != NULL) {
940 udev_device_read_db(event->dev_db, NULL);
941 udev_device_set_info_loaded(event->dev_db);
943 /* disable watch during event processing */
944 if (major(udev_device_get_devnum(dev)) != 0)
945 udev_watch_end(event->udev, event->dev_db);
948 udev_rules_apply_to_event(rules, event, sigmask);
950 /* rename a new network interface, if needed */
951 if (udev_device_get_ifindex(dev) > 0 && strcmp(udev_device_get_action(dev), "add") == 0 &&
952 event->name != NULL && strcmp(event->name, udev_device_get_sysname(dev)) != 0) {
953 char syspath[UTIL_PATH_SIZE];
956 err = rename_netif(event);
958 info(event->udev, "renamed netif to '%s'\n", event->name);
960 /* delete stale db file */
961 udev_device_delete_db(dev);
962 udev_device_tag_index(dev, NULL, false);
964 /* remember old name */
965 udev_device_add_property(dev, "INTERFACE_OLD", udev_device_get_sysname(dev));
967 /* now change the devpath, because the kernel device name has changed */
968 util_strscpy(syspath, sizeof(syspath), udev_device_get_syspath(dev));
969 pos = strrchr(syspath, '/');
972 util_strscpy(pos, sizeof(syspath) - (pos - syspath), event->name);
973 udev_device_set_syspath(event->dev, syspath);
974 udev_device_add_property(dev, "INTERFACE", udev_device_get_sysname(dev));
975 info(event->udev, "changed devpath to '%s'\n", udev_device_get_devpath(dev));
980 if (major(udev_device_get_devnum(dev)) != 0) {
981 char filename[UTIL_PATH_SIZE];
983 if (event->tmp_node != NULL) {
984 info(event->udev, "cleanup temporary device node\n");
985 util_unlink_secure(event->udev, event->tmp_node);
986 free(event->tmp_node);
987 event->tmp_node = NULL;
990 /* no rule, use kernel provided name */
991 if (event->name == NULL) {
992 if (udev_device_get_knodename(dev) != NULL) {
993 event->name = strdup(udev_device_get_knodename(dev));
994 info(event->udev, "no node name set, will use kernel supplied name '%s'\n", event->name);
996 event->name = strdup(udev_device_get_sysname(event->dev));
997 info(event->udev, "no node name set, will use device name '%s'\n", event->name);
1001 if (event->name == NULL || event->name[0] == '\0') {
1002 udev_device_delete_db(dev);
1003 udev_device_tag_index(dev, NULL, false);
1004 udev_device_unref(event->dev_db);
1006 err(event->udev, "no node name, something went wrong, ignoring\n");
1010 if (udev_device_get_knodename(dev) != NULL && strcmp(udev_device_get_knodename(dev), event->name) != 0)
1011 err(event->udev, "kernel-provided name '%s' and NAME= '%s' disagree, "
1012 "please use SYMLINK+= or change the kernel to provide the proper name\n",
1013 udev_device_get_knodename(dev), event->name);
1015 /* set device node name */
1016 util_strscpyl(filename, sizeof(filename), udev_get_dev_path(event->udev), "/", event->name, NULL);
1017 udev_device_set_devnode(dev, filename);
1019 /* remove/update possible left-over symlinks from old database entry */
1020 if (event->dev_db != NULL)
1021 udev_node_update_old_links(dev, event->dev_db);
1023 if (!event->mode_set) {
1024 if (udev_device_get_devnode_mode(dev) > 0) {
1025 /* kernel supplied value */
1026 event->mode = udev_device_get_devnode_mode(dev);
1027 } else if (event->gid > 0) {
1028 /* default 0660 if a group is assigned */
1036 err = udev_node_add(dev, event->mode, event->uid, event->gid);
1039 /* preserve old, or get new initialization timestamp */
1040 if (event->dev_db != NULL && udev_device_get_usec_initialized(event->dev_db) > 0)
1041 udev_device_set_usec_initialized(event->dev, udev_device_get_usec_initialized(event->dev_db));
1043 udev_device_set_usec_initialized(event->dev, now_usec());
1045 /* (re)write database file */
1046 udev_device_update_db(dev);
1047 udev_device_tag_index(dev, event->dev_db, true);
1048 udev_device_set_is_initialized(dev);
1050 udev_device_unref(event->dev_db);
1051 event->dev_db = NULL;
1057 int udev_event_execute_run(struct udev_event *event, const sigset_t *sigmask)
1059 struct udev_list_entry *list_entry;
1062 dbg(event->udev, "executing run list\n");
1063 udev_list_entry_foreach(list_entry, udev_list_get_entry(&event->run_list)) {
1064 const char *cmd = udev_list_entry_get_name(list_entry);
1066 if (strncmp(cmd, "socket:", strlen("socket:")) == 0) {
1067 struct udev_monitor *monitor;
1069 monitor = udev_monitor_new_from_socket(event->udev, &cmd[strlen("socket:")]);
1070 if (monitor == NULL)
1072 udev_monitor_send_device(monitor, NULL, event->dev);
1073 udev_monitor_unref(monitor);
1075 char program[UTIL_PATH_SIZE];
1078 if (event->exec_delay > 0) {
1079 info(event->udev, "delay execution of '%s'\n", program);
1080 sleep(event->exec_delay);
1083 udev_event_apply_format(event, cmd, program, sizeof(program));
1084 envp = udev_device_get_properties_envp(event->dev);
1085 if (udev_event_spawn(event, program, envp, sigmask, NULL, 0) < 0) {
1086 if (udev_list_entry_get_num(list_entry))