2 * Copyright (C) 2004-2009 Kay Sievers <kay.sievers@vrfy.org>
3 * Copyright (C) 2004 Chris Friesen <chris_friesen@sympatico.ca>
4 * Copyright (C) 2009 Canonical Ltd.
5 * Copyright (C) 2009 Scott James Remnant <scott@netsplit.com>
7 * This program is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
33 #include <sys/prctl.h>
34 #include <sys/socket.h>
35 #include <sys/signalfd.h>
36 #include <sys/select.h>
40 #include <sys/ioctl.h>
41 #include <sys/inotify.h>
45 #define UDEVD_PRIORITY -4
46 #define UDEV_PRIORITY -2
50 static void log_fn(struct udev *udev, int priority,
51 const char *file, int line, const char *fn,
52 const char *format, va_list args)
55 fprintf(stderr, "[%d] %s: ", (int) getpid(), fn);
56 vfprintf(stderr, format, args);
58 vsyslog(priority, format, args);
62 static int debug_trace;
63 static struct udev_rules *rules;
64 static struct udev_queue_export *udev_queue_export;
65 static struct udev_ctrl *udev_ctrl;
66 static struct udev_monitor *monitor;
67 static int worker_watch[2];
68 static pid_t settle_pid;
69 static int stop_exec_queue;
70 static int reload_config;
71 static int max_childs;
73 static struct udev_list_node event_list;
74 static struct udev_list_node worker_list;
76 static volatile sig_atomic_t worker_exit;
86 static struct pollfd pfd[] = {
87 [FD_NETLINK] = { .events = POLLIN },
88 [FD_WORKER] = { .events = POLLIN },
89 [FD_SIGNAL] = { .events = POLLIN },
90 [FD_INOTIFY] = { .events = POLLIN },
91 [FD_CONTROL] = { .events = POLLIN },
101 struct udev_list_node node;
103 struct udev_device *dev;
104 enum event_state state;
106 unsigned long long int delaying_seqnum;
107 unsigned long long int seqnum;
110 const char *devpath_old;
113 static struct event *node_to_event(struct udev_list_node *node)
117 event = (char *)node;
118 event -= offsetof(struct event, node);
119 return (struct event *)event;
130 struct udev_list_node node;
132 struct udev_monitor *monitor;
133 enum worker_state state;
137 /* passed from worker to main process */
138 struct worker_message {
143 static struct worker *node_to_worker(struct udev_list_node *node)
147 worker = (char *)node;
148 worker -= offsetof(struct worker, node);
149 return (struct worker *)worker;
152 static void event_queue_delete(struct event *event)
154 udev_list_node_remove(&event->node);
156 /* mark as failed, if "add" event returns non-zero */
157 if (event->exitcode && strcmp(udev_device_get_action(event->dev), "add") == 0)
158 udev_queue_export_device_failed(udev_queue_export, event->dev);
160 udev_queue_export_device_finished(udev_queue_export, event->dev);
162 udev_device_unref(event->dev);
166 static void event_sig_handler(int signum)
178 static void worker_unref(struct worker *worker)
180 udev_monitor_unref(worker->monitor);
184 static void worker_new(struct event *event)
186 struct worker *worker;
187 struct udev_monitor *worker_monitor;
189 struct sigaction act;
191 /* listen for new events */
192 worker_monitor = udev_monitor_new_from_netlink(event->udev, NULL);
193 if (worker_monitor == NULL)
195 /* allow the main daemon netlink address to send devices to the worker */
196 udev_monitor_allow_unicast_sender(worker_monitor, monitor);
197 udev_monitor_enable_receiving(worker_monitor);
198 util_set_fd_cloexec(udev_monitor_get_fd(worker_monitor));
200 worker = calloc(1, sizeof(struct worker));
208 struct udev_device *dev;
210 udev_queue_export_unref(udev_queue_export);
211 udev_monitor_unref(monitor);
212 udev_ctrl_unref(udev_ctrl);
213 close(pfd[FD_SIGNAL].fd);
214 close(worker_watch[READ_END]);
216 logging_init("udevd-work");
217 setpriority(PRIO_PROCESS, 0, UDEV_PRIORITY);
219 /* set signal handlers */
220 memset(&act, 0x00, sizeof(act));
221 act.sa_handler = event_sig_handler;
222 sigemptyset (&act.sa_mask);
224 sigaction(SIGTERM, &act, NULL);
225 sigaction(SIGALRM, &act, NULL);
227 /* unblock signals */
229 sigdelset(&mask, SIGTERM);
230 sigdelset(&mask, SIGALRM);
231 sigprocmask(SIG_SETMASK, &mask, NULL);
233 /* request TERM signal if parent exits */
234 prctl(PR_SET_PDEATHSIG, SIGTERM);
239 while (!worker_exit) {
240 struct udev_event *udev_event;
241 struct worker_message msg;
244 udev_event = udev_event_new(dev);
245 if (udev_event == NULL)
248 /* set timeout to prevent hanging processes */
249 alarm(UDEV_EVENT_TIMEOUT);
251 /* apply rules, create node, symlinks */
252 err = udev_event_execute_rules(udev_event, rules);
254 /* rules may change/disable the timeout */
255 if (udev_device_get_event_timeout(dev) >= 0)
256 alarm(udev_device_get_event_timeout(dev));
259 if (err == 0 && !udev_event->ignore_device && udev_get_run(udev_event->udev))
260 udev_event_execute_run(udev_event);
265 /* apply/restore inotify watch */
266 if (err == 0 && udev_event->inotify_watch) {
267 udev_watch_begin(udev_event->udev, dev);
268 udev_device_update_db(dev);
271 /* send processed event back to libudev listeners */
272 udev_monitor_send_device(worker_monitor, NULL, dev);
274 info(event->udev, "seq %llu finished with %i\n", udev_device_get_seqnum(dev), err);
275 udev_device_unref(dev);
276 udev_event_unref(udev_event);
278 /* send back the result of the event execution */
281 send(worker_watch[WRITE_END], &msg, sizeof(struct worker_message), 0);
283 /* wait for more device messages from udevd */
285 dev = udev_monitor_receive_device(worker_monitor);
286 while (!worker_exit && dev == NULL);
289 udev_monitor_unref(worker_monitor);
294 udev_monitor_unref(worker_monitor);
295 event->state = EVENT_QUEUED;
297 err(event->udev, "fork of child failed: %m\n");
300 /* close monitor, but keep address around */
301 udev_monitor_disconnect(worker_monitor);
302 worker->monitor = worker_monitor;
304 worker->state = WORKER_RUNNING;
305 worker->event = event;
306 event->state = EVENT_RUNNING;
307 udev_list_node_append(&worker->node, &worker_list);
313 static void event_run(struct event *event)
315 struct udev_list_node *loop;
317 udev_list_node_foreach(loop, &worker_list) {
318 struct worker *worker = node_to_worker(loop);
321 if (worker->state != WORKER_IDLE)
324 worker->event = event;
325 worker->state = WORKER_RUNNING;
326 event->state = EVENT_RUNNING;
327 count = udev_monitor_send_device(monitor, worker->monitor, event->dev);
329 err(event->udev, "worker [%u] did not accept message, kill it\n", worker->pid);
330 event->state = EVENT_QUEUED;
331 worker->state = WORKER_KILLED;
332 kill(worker->pid, SIGKILL);
338 if (childs >= max_childs) {
339 info(event->udev, "maximum number (%i) of childs reached\n", childs);
343 /* start new worker and pass initial device */
347 static void event_queue_insert(struct udev_device *dev)
351 event = calloc(1, sizeof(struct event));
355 event->udev = udev_device_get_udev(dev);
357 event->seqnum = udev_device_get_seqnum(dev);
358 event->devpath = udev_device_get_devpath(dev);
359 event->devpath_len = strlen(event->devpath);
360 event->devpath_old = udev_device_get_devpath_old(dev);
362 udev_queue_export_device_queued(udev_queue_export, dev);
363 info(event->udev, "seq %llu queued, '%s' '%s'\n", udev_device_get_seqnum(dev),
364 udev_device_get_action(dev), udev_device_get_subsystem(dev));
366 event->state = EVENT_QUEUED;
367 udev_list_node_append(&event->node, &event_list);
369 /* run all events with a timeout set immediately */
370 if (udev_device_get_timeout(dev) > 0) {
376 static void worker_kill(int retain)
378 struct udev_list_node *loop;
381 if (childs <= retain)
384 max = childs - retain;
386 udev_list_node_foreach(loop, &worker_list) {
387 struct worker *worker = node_to_worker(loop);
392 if (worker->state == WORKER_KILLED)
395 worker->state = WORKER_KILLED;
396 kill(worker->pid, SIGTERM);
400 static int mem_size_mb(void)
404 long int memsize = -1;
406 f = fopen("/proc/meminfo", "r");
410 while (fgets(buf, sizeof(buf), f) != NULL) {
413 if (sscanf(buf, "MemTotal: %ld kB", &value) == 1) {
414 memsize = value / 1024;
423 /* lookup event for identical, parent, child device */
424 static int devpath_busy(struct event *event)
426 struct udev_list_node *loop;
429 /* check if queue contains events we depend on */
430 udev_list_node_foreach(loop, &event_list) {
431 struct event *loop_event = node_to_event(loop);
433 /* we already found a later event, earlier can not block us, no need to check again */
434 if (loop_event->seqnum < event->delaying_seqnum)
437 /* event we checked earlier still exists, no need to check again */
438 if (loop_event->seqnum == event->delaying_seqnum)
441 /* found ourself, no later event can block us */
442 if (loop_event->seqnum >= event->seqnum)
445 /* check our old name */
446 if (event->devpath_old != NULL)
447 if (strcmp(loop_event->devpath, event->devpath_old) == 0) {
448 event->delaying_seqnum = loop_event->seqnum;
452 /* compare devpath */
453 common = MIN(loop_event->devpath_len, event->devpath_len);
455 /* one devpath is contained in the other? */
456 if (memcmp(loop_event->devpath, event->devpath, common) != 0)
459 /* identical device event found */
460 if (loop_event->devpath_len == event->devpath_len) {
461 event->delaying_seqnum = loop_event->seqnum;
465 /* parent device event found */
466 if (event->devpath[common] == '/') {
467 event->delaying_seqnum = loop_event->seqnum;
471 /* child device event found */
472 if (loop_event->devpath[common] == '/') {
473 event->delaying_seqnum = loop_event->seqnum;
477 /* no matching device */
484 static void events_start(struct udev *udev)
486 struct udev_list_node *loop;
488 udev_list_node_foreach(loop, &event_list) {
489 struct event *event = node_to_event(loop);
491 if (event->state != EVENT_QUEUED)
494 /* do not start event if parent or child event is still running */
495 if (devpath_busy(event) != 0) {
496 dbg(udev, "delay seq %llu (%s)\n", event->seqnum, event->devpath);
504 static void worker_returned(void)
507 struct worker_message msg;
509 struct udev_list_node *loop;
511 size = recv(pfd[FD_WORKER].fd, &msg, sizeof(struct worker_message), MSG_DONTWAIT);
512 if (size != sizeof(struct worker_message))
515 /* lookup worker who sent the signal */
516 udev_list_node_foreach(loop, &worker_list) {
517 struct worker *worker = node_to_worker(loop);
519 if (worker->pid != msg.pid)
522 /* worker returned */
523 worker->event->exitcode = msg.exitcode;
524 event_queue_delete(worker->event);
525 worker->event = NULL;
526 worker->state = WORKER_IDLE;
532 /* receive the udevd message from userspace */
533 static void handle_ctrl_msg(struct udev_ctrl *uctrl)
535 struct udev *udev = udev_ctrl_get_udev(uctrl);
536 struct udev_ctrl_msg *ctrl_msg;
540 ctrl_msg = udev_ctrl_receive_msg(uctrl);
541 if (ctrl_msg == NULL)
544 i = udev_ctrl_get_set_log_level(ctrl_msg);
546 info(udev, "udevd message (SET_LOG_PRIORITY) received, log_priority=%i\n", i);
547 udev_set_log_priority(udev, i);
551 if (udev_ctrl_get_stop_exec_queue(ctrl_msg) > 0) {
552 info(udev, "udevd message (STOP_EXEC_QUEUE) received\n");
556 if (udev_ctrl_get_start_exec_queue(ctrl_msg) > 0) {
557 info(udev, "udevd message (START_EXEC_QUEUE) received\n");
561 if (udev_ctrl_get_reload_rules(ctrl_msg) > 0) {
562 info(udev, "udevd message (RELOAD_RULES) received\n");
566 str = udev_ctrl_get_set_env(ctrl_msg);
574 val = strchr(key, '=');
578 if (val[0] == '\0') {
579 info(udev, "udevd message (ENV) received, unset '%s'\n", key);
580 udev_add_property(udev, key, NULL);
582 info(udev, "udevd message (ENV) received, set '%s=%s'\n", key, val);
583 udev_add_property(udev, key, val);
586 err(udev, "wrong key format '%s'\n", key);
593 i = udev_ctrl_get_set_max_childs(ctrl_msg);
595 info(udev, "udevd message (SET_MAX_CHILDS) received, max_childs=%i\n", i);
599 settle_pid = udev_ctrl_get_settle(ctrl_msg);
600 if (settle_pid > 0) {
601 info(udev, "udevd message (SETTLE) received\n");
602 kill(settle_pid, SIGUSR1);
605 udev_ctrl_msg_unref(ctrl_msg);
608 /* read inotify messages */
609 static int handle_inotify(struct udev *udev)
613 struct inotify_event *ev;
615 if ((ioctl(pfd[FD_INOTIFY].fd, FIONREAD, &nbytes) < 0) || (nbytes <= 0))
618 buf = malloc(nbytes);
620 err(udev, "error getting buffer for inotify, disable watching\n");
624 nbytes = read(pfd[FD_INOTIFY].fd, buf, nbytes);
626 for (pos = 0; pos < nbytes; pos += sizeof(struct inotify_event) + ev->len) {
627 struct udev_device *dev;
629 ev = (struct inotify_event *)(buf + pos);
631 dbg(udev, "inotify event: %x for %s\n", ev->mask, ev->name);
636 dev = udev_watch_lookup(udev, ev->wd);
638 dbg(udev, "inotify event: %x for %s\n", ev->mask, udev_device_get_devnode(dev));
639 if (ev->mask & IN_CLOSE_WRITE) {
640 char filename[UTIL_PATH_SIZE];
643 info(udev, "device %s closed, synthesising 'change'\n", udev_device_get_devnode(dev));
644 util_strscpyl(filename, sizeof(filename), udev_device_get_syspath(dev), "/uevent", NULL);
645 fd = open(filename, O_WRONLY);
646 if (fd < 0 || write(fd, "change", 6) < 0)
647 info(udev, "error writing uevent: %m\n");
650 if (ev->mask & IN_IGNORED)
651 udev_watch_end(udev, dev);
653 udev_device_unref(dev);
662 static void handle_signal(int signo)
672 struct udev_list_node *loop, *tmp;
674 pid = waitpid(-1, NULL, WNOHANG);
678 udev_list_node_foreach_safe(loop, tmp, &worker_list) {
679 struct worker *worker = node_to_worker(loop);
681 if (worker->pid != pid)
684 /* fail event, if worker died unexpectedly */
685 if (worker->event != NULL) {
686 worker->event->exitcode = 127;
687 event_queue_delete(worker->event);
690 udev_list_node_remove(&worker->node);
691 worker_unref(worker);
703 static void startup_log(struct udev *udev)
706 char path[UTIL_PATH_SIZE];
709 f = fopen("/dev/kmsg", "w");
711 fprintf(f, "<6>udev: starting version " VERSION "\n");
713 util_strscpyl(path, sizeof(path), udev_get_sys_path(udev), "/class/mem/null", NULL);
714 if (lstat(path, &statbuf) == 0 && S_ISDIR(statbuf.st_mode)) {
715 const char *depr_str =
716 "udev: missing sysfs features; please update the kernel "
717 "or disable the kernel's CONFIG_SYSFS_DEPRECATED option; "
718 "udev may fail to work correctly";
721 fprintf(f, "<3>%s\n", depr_str);
722 err(udev, "%s\n", depr_str);
730 int main(int argc, char *argv[])
737 int resolve_names = 1;
738 static const struct option options[] = {
739 { "daemon", no_argument, NULL, 'd' },
740 { "debug-trace", no_argument, NULL, 't' },
741 { "debug", no_argument, NULL, 'D' },
742 { "help", no_argument, NULL, 'h' },
743 { "version", no_argument, NULL, 'V' },
744 { "resolve-names", required_argument, NULL, 'N' },
753 logging_init("udevd");
754 udev_set_log_fn(udev, log_fn);
755 info(udev, "version %s\n", VERSION);
756 udev_selinux_init(udev);
761 option = getopt_long(argc, argv, "dDthV", options, NULL);
774 if (udev_get_log_priority(udev) < LOG_INFO)
775 udev_set_log_priority(udev, LOG_INFO);
778 if (strcmp (optarg, "early") == 0) {
780 } else if (strcmp (optarg, "late") == 0) {
782 } else if (strcmp (optarg, "never") == 0) {
785 fprintf(stderr, "resolve-names must be early, late or never\n");
786 err(udev, "resolve-names must be early, late or never\n");
791 printf("Usage: udevd [--help] [--daemon] [--debug-trace] [--debug] "
792 "[--resolve-names=early|late|never] [--version]\n");
795 printf("%s\n", VERSION);
803 fprintf(stderr, "root privileges required\n");
804 err(udev, "root privileges required\n");
808 /* make sure std{in,out,err} fd's are in a sane state */
809 fd = open("/dev/null", O_RDWR);
811 fprintf(stderr, "cannot open /dev/null\n");
812 err(udev, "cannot open /dev/null\n");
814 if (write(STDOUT_FILENO, 0, 0) < 0)
815 dup2(fd, STDOUT_FILENO);
816 if (write(STDERR_FILENO, 0, 0) < 0)
817 dup2(fd, STDERR_FILENO);
819 /* init control socket, bind() ensures, that only one udevd instance is running */
820 udev_ctrl = udev_ctrl_new_from_socket(udev, UDEV_CTRL_SOCK_PATH);
821 if (udev_ctrl == NULL) {
822 fprintf(stderr, "error initializing control socket");
823 err(udev, "error initializing udevd socket");
827 if (udev_ctrl_enable_receiving(udev_ctrl) < 0) {
828 fprintf(stderr, "error binding control socket, seems udevd is already running\n");
829 err(udev, "error binding control socket, seems udevd is already running\n");
833 pfd[FD_CONTROL].fd = udev_ctrl_get_fd(udev_ctrl);
835 monitor = udev_monitor_new_from_netlink(udev, "kernel");
836 if (monitor == NULL || udev_monitor_enable_receiving(monitor) < 0) {
837 fprintf(stderr, "error initializing netlink socket\n");
838 err(udev, "error initializing netlink socket\n");
842 udev_monitor_set_receive_buffer_size(monitor, 128*1024*1024);
843 pfd[FD_NETLINK].fd = udev_monitor_get_fd(monitor);
845 pfd[FD_INOTIFY].fd = udev_watch_init(udev);
846 if (pfd[FD_INOTIFY].fd < 0) {
847 fprintf(stderr, "error initializing inotify\n");
848 err(udev, "error initializing inotify\n");
853 if (udev_get_rules_path(udev) != NULL) {
854 inotify_add_watch(pfd[FD_INOTIFY].fd, udev_get_rules_path(udev),
855 IN_CREATE | IN_DELETE | IN_MOVE | IN_CLOSE_WRITE);
857 char filename[UTIL_PATH_SIZE];
859 inotify_add_watch(pfd[FD_INOTIFY].fd, UDEV_PREFIX "/lib/udev/rules.d",
860 IN_CREATE | IN_DELETE | IN_MOVE | IN_CLOSE_WRITE);
861 inotify_add_watch(pfd[FD_INOTIFY].fd, SYSCONFDIR "/udev/rules.d",
862 IN_CREATE | IN_DELETE | IN_MOVE | IN_CLOSE_WRITE);
864 /* watch dynamic rules directory */
865 util_strscpyl(filename, sizeof(filename), udev_get_dev_path(udev), "/.udev/rules.d", NULL);
866 inotify_add_watch(pfd[FD_INOTIFY].fd, filename,
867 IN_CREATE | IN_DELETE | IN_MOVE | IN_CLOSE_WRITE);
869 udev_watch_restore(udev);
871 /* block and listen to all signals on signalfd */
873 sigprocmask(SIG_SETMASK, &mask, NULL);
874 pfd[FD_SIGNAL].fd = signalfd(-1, &mask, 0);
875 if (pfd[FD_SIGNAL].fd < 0) {
876 fprintf(stderr, "error getting signalfd\n");
877 err(udev, "error getting signalfd\n");
882 /* unnamed socket from workers to the main daemon */
883 if (socketpair(AF_LOCAL, SOCK_DGRAM, 0, worker_watch) < 0) {
884 fprintf(stderr, "error getting socketpair\n");
885 err(udev, "error getting socketpair\n");
889 pfd[FD_WORKER].fd = worker_watch[READ_END];
890 util_set_fd_cloexec(worker_watch[WRITE_END]);
892 rules = udev_rules_new(udev, resolve_names);
894 err(udev, "error reading rules\n");
898 udev_queue_export = udev_queue_export_new(udev);
899 if (udev_queue_export == NULL) {
900 err(udev, "error creating queue file\n");
912 err(udev, "fork of daemon failed: %m\n");
923 /* redirect std{out,err} */
924 if (!debug && !debug_trace) {
925 dup2(fd, STDIN_FILENO);
926 dup2(fd, STDOUT_FILENO);
927 dup2(fd, STDERR_FILENO);
929 if (fd > STDERR_FILENO)
932 /* set scheduling priority for the daemon */
933 setpriority(PRIO_PROCESS, 0, UDEVD_PRIORITY);
939 /* OOM_DISABLE == -17 */
940 fd = open("/proc/self/oom_adj", O_RDWR);
942 err(udev, "error disabling OOM: %m\n");
948 /* in trace mode run one event after the other */
952 int memsize = mem_size_mb();
955 max_childs = 128 + (memsize / 8);
960 /* possibly overwrite maximum limit of executed events */
961 value = getenv("UDEVD_MAX_CHILDS");
963 max_childs = strtoul(value, NULL, 10);
964 info(udev, "initialize max_childs to %u\n", max_childs);
966 udev_list_init(&event_list);
967 udev_list_init(&worker_list);
973 /* set timeout to kill idle workers */
974 if (udev_list_is_empty(&event_list) && childs > 2)
978 /* wait for events */
979 fdcount = poll(pfd, ARRAY_SIZE(pfd), timeout);
983 /* timeout - kill idle workers */
987 /* event has finished */
988 if (pfd[FD_WORKER].revents & POLLIN)
991 /* get kernel uevent */
992 if (pfd[FD_NETLINK].revents & POLLIN) {
993 struct udev_device *dev;
995 dev = udev_monitor_receive_device(monitor);
997 event_queue_insert(dev);
999 udev_device_unref(dev);
1002 /* start new events */
1003 if (!udev_list_is_empty(&event_list) && !stop_exec_queue)
1007 if (pfd[FD_SIGNAL].revents & POLLIN) {
1008 struct signalfd_siginfo fdsi;
1011 size = read(pfd[FD_SIGNAL].fd, &fdsi, sizeof(struct signalfd_siginfo));
1012 if (size == sizeof(struct signalfd_siginfo))
1013 handle_signal(fdsi.ssi_signo);
1016 /* device node and rules directory inotify watch */
1017 if (pfd[FD_INOTIFY].revents & POLLIN)
1018 handle_inotify(udev);
1021 * get control message
1023 * This needs to be after the inotify handling, to make sure,
1024 * that the settle signal is send back after the possibly generated
1025 * "change" events by the inotify device node watch.
1027 if (pfd[FD_CONTROL].revents & POLLIN)
1028 handle_ctrl_msg(udev_ctrl);
1030 /* rules changed, set by inotify or a HUP signal */
1031 if (reload_config) {
1032 struct udev_rules *rules_new;
1035 rules_new = udev_rules_new(udev, resolve_names);
1036 if (rules_new != NULL) {
1037 udev_rules_unref(rules);
1044 udev_queue_export_cleanup(udev_queue_export);
1047 udev_queue_export_unref(udev_queue_export);
1048 udev_rules_unref(rules);
1049 udev_ctrl_unref(udev_ctrl);
1050 if (pfd[FD_SIGNAL].fd >= 0)
1051 close(pfd[FD_SIGNAL].fd);
1052 if (worker_watch[READ_END] >= 0)
1053 close(worker_watch[READ_END]);
1054 if (worker_watch[WRITE_END] >= 0)
1055 close(worker_watch[WRITE_END]);
1056 udev_monitor_unref(monitor);
1057 udev_selinux_exit(udev);