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);
199 worker = calloc(1, sizeof(struct worker));
207 struct udev_device *dev;
209 udev_queue_export_unref(udev_queue_export);
210 udev_ctrl_unref(udev_ctrl);
211 close(pfd[FD_SIGNAL].fd);
212 close(worker_watch[READ_END]);
214 logging_init("udevd-work");
215 setpriority(PRIO_PROCESS, 0, UDEV_PRIORITY);
217 /* set signal handlers */
218 memset(&act, 0x00, sizeof(act));
219 act.sa_handler = event_sig_handler;
220 sigemptyset (&act.sa_mask);
222 sigaction(SIGTERM, &act, NULL);
223 sigaction(SIGALRM, &act, NULL);
225 /* unblock signals */
227 sigdelset(&mask, SIGTERM);
228 sigdelset(&mask, SIGALRM);
229 sigprocmask(SIG_SETMASK, &mask, NULL);
231 /* request TERM signal if parent exits */
232 prctl(PR_SET_PDEATHSIG, SIGTERM);
237 while (!worker_exit) {
238 struct udev_event *udev_event;
239 struct worker_message msg;
242 udev_event = udev_event_new(dev);
243 if (udev_event == NULL)
246 /* set timeout to prevent hanging processes */
247 alarm(UDEV_EVENT_TIMEOUT);
249 /* apply rules, create node, symlinks */
250 err = udev_event_execute_rules(udev_event, rules);
252 /* rules may change/disable the timeout */
253 if (udev_device_get_event_timeout(dev) >= 0)
254 alarm(udev_device_get_event_timeout(dev));
257 if (err == 0 && !udev_event->ignore_device && udev_get_run(udev_event->udev))
258 udev_event_execute_run(udev_event);
263 /* apply/restore inotify watch */
264 if (err == 0 && udev_event->inotify_watch) {
265 udev_watch_begin(udev_event->udev, dev);
266 udev_device_update_db(dev);
269 /* send processed event back to libudev listeners */
270 udev_monitor_send_device(worker_monitor, NULL, dev);
272 info(event->udev, "seq %llu finished with %i\n", udev_device_get_seqnum(dev), err);
273 udev_device_unref(dev);
274 udev_event_unref(udev_event);
276 /* send back the result of the event execution */
279 send(worker_watch[WRITE_END], &msg, sizeof(struct worker_message), 0);
281 /* wait for more device messages from udevd */
283 dev = udev_monitor_receive_device(worker_monitor);
284 while (!worker_exit && dev == NULL);
287 udev_monitor_unref(worker_monitor);
292 udev_monitor_unref(worker_monitor);
293 event->state = EVENT_QUEUED;
295 err(event->udev, "fork of child failed: %m\n");
298 /* close monitor, but keep address around */
299 udev_monitor_disconnect(worker_monitor);
300 worker->monitor = worker_monitor;
302 worker->state = WORKER_RUNNING;
303 worker->event = event;
304 event->state = EVENT_RUNNING;
305 udev_list_node_append(&worker->node, &worker_list);
311 static void event_run(struct event *event)
313 struct udev_list_node *loop;
315 udev_list_node_foreach(loop, &worker_list) {
316 struct worker *worker = node_to_worker(loop);
319 if (worker->state != WORKER_IDLE)
322 worker->event = event;
323 worker->state = WORKER_RUNNING;
324 event->state = EVENT_RUNNING;
325 count = udev_monitor_send_device(monitor, worker->monitor, event->dev);
327 err(event->udev, "worker [%u] did not accept message, kill it\n", worker->pid);
328 event->state = EVENT_QUEUED;
329 worker->state = WORKER_KILLED;
330 kill(worker->pid, SIGKILL);
336 if (childs >= max_childs) {
337 info(event->udev, "maximum number (%i) of childs reached\n", childs);
341 /* start new worker and pass initial device */
345 static void event_queue_insert(struct udev_device *dev)
349 event = calloc(1, sizeof(struct event));
353 event->udev = udev_device_get_udev(dev);
355 event->seqnum = udev_device_get_seqnum(dev);
356 event->devpath = udev_device_get_devpath(dev);
357 event->devpath_len = strlen(event->devpath);
358 event->devpath_old = udev_device_get_devpath_old(dev);
360 udev_queue_export_device_queued(udev_queue_export, dev);
361 info(event->udev, "seq %llu queued, '%s' '%s'\n", udev_device_get_seqnum(dev),
362 udev_device_get_action(dev), udev_device_get_subsystem(dev));
364 event->state = EVENT_QUEUED;
365 udev_list_node_append(&event->node, &event_list);
367 /* run all events with a timeout set immediately */
368 if (udev_device_get_timeout(dev) > 0) {
374 static void worker_kill(int retain)
376 struct udev_list_node *loop;
379 if (childs <= retain)
382 max = childs - retain;
384 udev_list_node_foreach(loop, &worker_list) {
385 struct worker *worker = node_to_worker(loop);
390 if (worker->state == WORKER_KILLED)
393 worker->state = WORKER_KILLED;
394 kill(worker->pid, SIGTERM);
398 static int mem_size_mb(void)
402 long int memsize = -1;
404 f = fopen("/proc/meminfo", "r");
408 while (fgets(buf, sizeof(buf), f) != NULL) {
411 if (sscanf(buf, "MemTotal: %ld kB", &value) == 1) {
412 memsize = value / 1024;
421 /* lookup event for identical, parent, child device */
422 static int devpath_busy(struct event *event)
424 struct udev_list_node *loop;
427 /* check if queue contains events we depend on */
428 udev_list_node_foreach(loop, &event_list) {
429 struct event *loop_event = node_to_event(loop);
431 /* we already found a later event, earlier can not block us, no need to check again */
432 if (loop_event->seqnum < event->delaying_seqnum)
435 /* event we checked earlier still exists, no need to check again */
436 if (loop_event->seqnum == event->delaying_seqnum)
439 /* found ourself, no later event can block us */
440 if (loop_event->seqnum >= event->seqnum)
443 /* check our old name */
444 if (event->devpath_old != NULL)
445 if (strcmp(loop_event->devpath, event->devpath_old) == 0) {
446 event->delaying_seqnum = loop_event->seqnum;
450 /* compare devpath */
451 common = MIN(loop_event->devpath_len, event->devpath_len);
453 /* one devpath is contained in the other? */
454 if (memcmp(loop_event->devpath, event->devpath, common) != 0)
457 /* identical device event found */
458 if (loop_event->devpath_len == event->devpath_len) {
459 event->delaying_seqnum = loop_event->seqnum;
463 /* parent device event found */
464 if (event->devpath[common] == '/') {
465 event->delaying_seqnum = loop_event->seqnum;
469 /* child device event found */
470 if (loop_event->devpath[common] == '/') {
471 event->delaying_seqnum = loop_event->seqnum;
475 /* no matching device */
482 static void events_start(struct udev *udev)
484 struct udev_list_node *loop;
486 udev_list_node_foreach(loop, &event_list) {
487 struct event *event = node_to_event(loop);
489 if (event->state != EVENT_QUEUED)
492 /* do not start event if parent or child event is still running */
493 if (devpath_busy(event) != 0) {
494 dbg(udev, "delay seq %llu (%s)\n", event->seqnum, event->devpath);
502 static void worker_returned(void)
505 struct worker_message msg;
507 struct udev_list_node *loop;
509 size = recv(pfd[FD_WORKER].fd, &msg, sizeof(struct worker_message), MSG_DONTWAIT);
510 if (size != sizeof(struct worker_message))
513 /* lookup worker who sent the signal */
514 udev_list_node_foreach(loop, &worker_list) {
515 struct worker *worker = node_to_worker(loop);
517 if (worker->pid != msg.pid)
520 /* worker returned */
521 worker->event->exitcode = msg.exitcode;
522 event_queue_delete(worker->event);
523 worker->event = NULL;
524 worker->state = WORKER_IDLE;
530 /* receive the udevd message from userspace */
531 static void handle_ctrl_msg(struct udev_ctrl *uctrl)
533 struct udev *udev = udev_ctrl_get_udev(uctrl);
534 struct udev_ctrl_msg *ctrl_msg;
538 ctrl_msg = udev_ctrl_receive_msg(uctrl);
539 if (ctrl_msg == NULL)
542 i = udev_ctrl_get_set_log_level(ctrl_msg);
544 info(udev, "udevd message (SET_LOG_PRIORITY) received, log_priority=%i\n", i);
545 udev_set_log_priority(udev, i);
549 if (udev_ctrl_get_stop_exec_queue(ctrl_msg) > 0) {
550 info(udev, "udevd message (STOP_EXEC_QUEUE) received\n");
554 if (udev_ctrl_get_start_exec_queue(ctrl_msg) > 0) {
555 info(udev, "udevd message (START_EXEC_QUEUE) received\n");
559 if (udev_ctrl_get_reload_rules(ctrl_msg) > 0) {
560 info(udev, "udevd message (RELOAD_RULES) received\n");
564 str = udev_ctrl_get_set_env(ctrl_msg);
572 val = strchr(key, '=');
576 if (val[0] == '\0') {
577 info(udev, "udevd message (ENV) received, unset '%s'\n", key);
578 udev_add_property(udev, key, NULL);
580 info(udev, "udevd message (ENV) received, set '%s=%s'\n", key, val);
581 udev_add_property(udev, key, val);
584 err(udev, "wrong key format '%s'\n", key);
591 i = udev_ctrl_get_set_max_childs(ctrl_msg);
593 info(udev, "udevd message (SET_MAX_CHILDS) received, max_childs=%i\n", i);
597 settle_pid = udev_ctrl_get_settle(ctrl_msg);
598 if (settle_pid > 0) {
599 info(udev, "udevd message (SETTLE) received\n");
600 kill(settle_pid, SIGUSR1);
603 udev_ctrl_msg_unref(ctrl_msg);
606 /* read inotify messages */
607 static int handle_inotify(struct udev *udev)
611 struct inotify_event *ev;
613 if ((ioctl(pfd[FD_INOTIFY].fd, FIONREAD, &nbytes) < 0) || (nbytes <= 0))
616 buf = malloc(nbytes);
618 err(udev, "error getting buffer for inotify, disable watching\n");
622 nbytes = read(pfd[FD_INOTIFY].fd, buf, nbytes);
624 for (pos = 0; pos < nbytes; pos += sizeof(struct inotify_event) + ev->len) {
625 struct udev_device *dev;
627 ev = (struct inotify_event *)(buf + pos);
629 dbg(udev, "inotify event: %x for %s\n", ev->mask, ev->name);
634 dev = udev_watch_lookup(udev, ev->wd);
636 dbg(udev, "inotify event: %x for %s\n", ev->mask, udev_device_get_devnode(dev));
637 if (ev->mask & IN_CLOSE_WRITE) {
638 char filename[UTIL_PATH_SIZE];
641 info(udev, "device %s closed, synthesising 'change'\n", udev_device_get_devnode(dev));
642 util_strscpyl(filename, sizeof(filename), udev_device_get_syspath(dev), "/uevent", NULL);
643 fd = open(filename, O_WRONLY);
644 if (fd < 0 || write(fd, "change", 6) < 0)
645 info(udev, "error writing uevent: %m\n");
648 if (ev->mask & IN_IGNORED)
649 udev_watch_end(udev, dev);
651 udev_device_unref(dev);
660 static void handle_signal(int signo)
670 struct udev_list_node *loop, *tmp;
672 pid = waitpid(-1, NULL, WNOHANG);
676 udev_list_node_foreach_safe(loop, tmp, &worker_list) {
677 struct worker *worker = node_to_worker(loop);
679 if (worker->pid != pid)
682 /* fail event, if worker died unexpectedly */
683 if (worker->event != NULL) {
684 worker->event->exitcode = 127;
685 event_queue_delete(worker->event);
688 udev_list_node_remove(&worker->node);
689 worker_unref(worker);
701 static void startup_log(struct udev *udev)
704 char path[UTIL_PATH_SIZE];
707 f = fopen("/dev/kmsg", "w");
709 fprintf(f, "<6>udev: starting version " VERSION "\n");
711 util_strscpyl(path, sizeof(path), udev_get_sys_path(udev), "/class/mem/null", NULL);
712 if (lstat(path, &statbuf) == 0 && S_ISDIR(statbuf.st_mode)) {
713 const char *depr_str =
714 "udev: missing sysfs features; please update the kernel "
715 "or disable the kernel's CONFIG_SYSFS_DEPRECATED option; "
716 "udev may fail to work correctly";
719 fprintf(f, "<3>%s\n", depr_str);
720 err(udev, "%s\n", depr_str);
728 int main(int argc, char *argv[])
735 int resolve_names = 1;
736 static const struct option options[] = {
737 { "daemon", no_argument, NULL, 'd' },
738 { "debug-trace", no_argument, NULL, 't' },
739 { "debug", no_argument, NULL, 'D' },
740 { "help", no_argument, NULL, 'h' },
741 { "version", no_argument, NULL, 'V' },
742 { "resolve-names", required_argument, NULL, 'N' },
751 logging_init("udevd");
752 udev_set_log_fn(udev, log_fn);
753 info(udev, "version %s\n", VERSION);
754 udev_selinux_init(udev);
759 option = getopt_long(argc, argv, "dDthV", options, NULL);
772 if (udev_get_log_priority(udev) < LOG_INFO)
773 udev_set_log_priority(udev, LOG_INFO);
776 if (strcmp (optarg, "early") == 0) {
778 } else if (strcmp (optarg, "late") == 0) {
780 } else if (strcmp (optarg, "never") == 0) {
783 fprintf(stderr, "resolve-names must be early, late or never\n");
784 err(udev, "resolve-names must be early, late or never\n");
789 printf("Usage: udevd [--help] [--daemon] [--debug-trace] [--debug] "
790 "[--resolve-names=early|late|never] [--version]\n");
793 printf("%s\n", VERSION);
801 fprintf(stderr, "root privileges required\n");
802 err(udev, "root privileges required\n");
806 /* make sure std{in,out,err} fd's are in a sane state */
807 fd = open("/dev/null", O_RDWR);
809 fprintf(stderr, "cannot open /dev/null\n");
810 err(udev, "cannot open /dev/null\n");
812 if (write(STDOUT_FILENO, 0, 0) < 0)
813 dup2(fd, STDOUT_FILENO);
814 if (write(STDERR_FILENO, 0, 0) < 0)
815 dup2(fd, STDERR_FILENO);
817 /* init control socket, bind() ensures, that only one udevd instance is running */
818 udev_ctrl = udev_ctrl_new_from_socket(udev, UDEV_CTRL_SOCK_PATH);
819 if (udev_ctrl == NULL) {
820 fprintf(stderr, "error initializing control socket");
821 err(udev, "error initializing udevd socket");
825 if (udev_ctrl_enable_receiving(udev_ctrl) < 0) {
826 fprintf(stderr, "error binding control socket, seems udevd is already running\n");
827 err(udev, "error binding control socket, seems udevd is already running\n");
831 pfd[FD_CONTROL].fd = udev_ctrl_get_fd(udev_ctrl);
833 monitor = udev_monitor_new_from_netlink(udev, "kernel");
834 if (monitor == NULL || udev_monitor_enable_receiving(monitor) < 0) {
835 fprintf(stderr, "error initializing netlink socket\n");
836 err(udev, "error initializing netlink socket\n");
840 udev_monitor_set_receive_buffer_size(monitor, 128*1024*1024);
841 pfd[FD_NETLINK].fd = udev_monitor_get_fd(monitor);
843 pfd[FD_INOTIFY].fd = udev_watch_init(udev);
844 if (pfd[FD_INOTIFY].fd < 0) {
845 fprintf(stderr, "error initializing inotify\n");
846 err(udev, "error initializing inotify\n");
851 if (udev_get_rules_path(udev) != NULL) {
852 inotify_add_watch(pfd[FD_INOTIFY].fd, udev_get_rules_path(udev),
853 IN_CREATE | IN_DELETE | IN_MOVE | IN_CLOSE_WRITE);
855 char filename[UTIL_PATH_SIZE];
857 inotify_add_watch(pfd[FD_INOTIFY].fd, UDEV_PREFIX "/lib/udev/rules.d",
858 IN_CREATE | IN_DELETE | IN_MOVE | IN_CLOSE_WRITE);
859 inotify_add_watch(pfd[FD_INOTIFY].fd, SYSCONFDIR "/udev/rules.d",
860 IN_CREATE | IN_DELETE | IN_MOVE | IN_CLOSE_WRITE);
862 /* watch dynamic rules directory */
863 util_strscpyl(filename, sizeof(filename), udev_get_dev_path(udev), "/.udev/rules.d", NULL);
864 inotify_add_watch(pfd[FD_INOTIFY].fd, filename,
865 IN_CREATE | IN_DELETE | IN_MOVE | IN_CLOSE_WRITE);
867 udev_watch_restore(udev);
869 /* block and listen to all signals on signalfd */
871 sigprocmask(SIG_SETMASK, &mask, NULL);
872 pfd[FD_SIGNAL].fd = signalfd(-1, &mask, 0);
873 if (pfd[FD_SIGNAL].fd < 0) {
874 fprintf(stderr, "error getting signalfd\n");
875 err(udev, "error getting signalfd\n");
880 /* unnamed socket from workers to the main daemon */
881 if (socketpair(AF_LOCAL, SOCK_DGRAM, 0, worker_watch) < 0) {
882 fprintf(stderr, "error getting socketpair\n");
883 err(udev, "error getting socketpair\n");
887 pfd[FD_WORKER].fd = worker_watch[READ_END];
889 rules = udev_rules_new(udev, resolve_names);
891 err(udev, "error reading rules\n");
895 udev_queue_export = udev_queue_export_new(udev);
896 if (udev_queue_export == NULL) {
897 err(udev, "error creating queue file\n");
909 err(udev, "fork of daemon failed: %m\n");
920 /* redirect std{out,err} */
921 if (!debug && !debug_trace) {
922 dup2(fd, STDIN_FILENO);
923 dup2(fd, STDOUT_FILENO);
924 dup2(fd, STDERR_FILENO);
926 if (fd > STDERR_FILENO)
929 /* set scheduling priority for the daemon */
930 setpriority(PRIO_PROCESS, 0, UDEVD_PRIORITY);
936 /* OOM_DISABLE == -17 */
937 fd = open("/proc/self/oom_adj", O_RDWR);
939 err(udev, "error disabling OOM: %m\n");
945 /* in trace mode run one event after the other */
949 int memsize = mem_size_mb();
952 max_childs = 128 + (memsize / 8);
957 /* possibly overwrite maximum limit of executed events */
958 value = getenv("UDEVD_MAX_CHILDS");
960 max_childs = strtoul(value, NULL, 10);
961 info(udev, "initialize max_childs to %u\n", max_childs);
963 udev_list_init(&event_list);
964 udev_list_init(&worker_list);
970 /* set timeout to kill idle workers */
971 if (udev_list_is_empty(&event_list) && childs > 2)
975 /* wait for events */
976 fdcount = poll(pfd, ARRAY_SIZE(pfd), timeout);
980 /* timeout - kill idle workers */
984 /* event has finished */
985 if (pfd[FD_WORKER].revents & POLLIN)
988 /* get kernel uevent */
989 if (pfd[FD_NETLINK].revents & POLLIN) {
990 struct udev_device *dev;
992 dev = udev_monitor_receive_device(monitor);
994 event_queue_insert(dev);
996 udev_device_unref(dev);
999 /* start new events */
1000 if (!udev_list_is_empty(&event_list) && !stop_exec_queue)
1004 if (pfd[FD_SIGNAL].revents & POLLIN) {
1005 struct signalfd_siginfo fdsi;
1008 size = read(pfd[FD_SIGNAL].fd, &fdsi, sizeof(struct signalfd_siginfo));
1009 if (size == sizeof(struct signalfd_siginfo))
1010 handle_signal(fdsi.ssi_signo);
1013 /* device node and rules directory inotify watch */
1014 if (pfd[FD_INOTIFY].revents & POLLIN)
1015 handle_inotify(udev);
1018 * get control message
1020 * This needs to be after the inotify handling, to make sure,
1021 * that the settle signal is send back after the possibly generated
1022 * "change" events by the inotify device node watch.
1024 if (pfd[FD_CONTROL].revents & POLLIN)
1025 handle_ctrl_msg(udev_ctrl);
1027 /* rules changed, set by inotify or a HUP signal */
1028 if (reload_config) {
1029 struct udev_rules *rules_new;
1032 rules_new = udev_rules_new(udev, resolve_names);
1033 if (rules_new != NULL) {
1034 udev_rules_unref(rules);
1041 udev_queue_export_cleanup(udev_queue_export);
1044 udev_queue_export_unref(udev_queue_export);
1045 udev_rules_unref(rules);
1046 udev_ctrl_unref(udev_ctrl);
1047 if (pfd[FD_SIGNAL].fd >= 0)
1048 close(pfd[FD_SIGNAL].fd);
1049 if (worker_watch[READ_END] >= 0)
1050 close(worker_watch[READ_END]);
1051 if (worker_watch[WRITE_END] >= 0)
1052 close(worker_watch[WRITE_END]);
1053 udev_monitor_unref(monitor);
1054 udev_selinux_exit(udev);