2 * Copyright (C) 2003-2013 Kay Sievers <kay@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/>.
27 #include <sys/prctl.h>
29 #include <sys/epoll.h>
31 #include <sys/signalfd.h>
33 #include "rtnl-util.h"
34 #include "event-util.h"
35 #include "formats-util.h"
36 #include "process-util.h"
37 #include "signal-util.h"
40 typedef struct Spawn
{
47 struct udev_event
*udev_event_new(struct udev_device
*dev
) {
48 struct udev
*udev
= udev_device_get_udev(dev
);
49 struct udev_event
*event
;
51 event
= new0(struct udev_event
, 1);
56 udev_list_init(udev
, &event
->run_list
, false);
57 udev_list_init(udev
, &event
->seclabel_list
, false);
58 event
->birth_usec
= clock_boottime_or_monotonic();
62 void udev_event_unref(struct udev_event
*event
) {
65 sd_rtnl_unref(event
->rtnl
);
66 udev_list_cleanup(&event
->run_list
);
67 udev_list_cleanup(&event
->seclabel_list
);
68 free(event
->program_result
);
73 size_t udev_event_apply_format(struct udev_event
*event
, const char *src
, char *dest
, size_t size
) {
74 struct udev_device
*dev
= event
->dev
;
94 static const struct subst_map
{
99 { .name
= "devnode", .fmt
= 'N', .type
= SUBST_DEVNODE
},
100 { .name
= "tempnode", .fmt
= 'N', .type
= SUBST_DEVNODE
},
101 { .name
= "attr", .fmt
= 's', .type
= SUBST_ATTR
},
102 { .name
= "sysfs", .fmt
= 's', .type
= SUBST_ATTR
},
103 { .name
= "env", .fmt
= 'E', .type
= SUBST_ENV
},
104 { .name
= "kernel", .fmt
= 'k', .type
= SUBST_KERNEL
},
105 { .name
= "number", .fmt
= 'n', .type
= SUBST_KERNEL_NUMBER
},
106 { .name
= "driver", .fmt
= 'd', .type
= SUBST_DRIVER
},
107 { .name
= "devpath", .fmt
= 'p', .type
= SUBST_DEVPATH
},
108 { .name
= "id", .fmt
= 'b', .type
= SUBST_ID
},
109 { .name
= "major", .fmt
= 'M', .type
= SUBST_MAJOR
},
110 { .name
= "minor", .fmt
= 'm', .type
= SUBST_MINOR
},
111 { .name
= "result", .fmt
= 'c', .type
= SUBST_RESULT
},
112 { .name
= "parent", .fmt
= 'P', .type
= SUBST_PARENT
},
113 { .name
= "name", .fmt
= 'D', .type
= SUBST_NAME
},
114 { .name
= "links", .fmt
= 'L', .type
= SUBST_LINKS
},
115 { .name
= "root", .fmt
= 'r', .type
= SUBST_ROOT
},
116 { .name
= "sys", .fmt
= 'S', .type
= SUBST_SYS
},
129 enum subst_type type
= SUBST_UNKNOWN
;
130 char attrbuf
[UTIL_PATH_SIZE
];
133 while (from
[0] != '\0') {
134 if (from
[0] == '$') {
135 /* substitute named variable */
138 if (from
[1] == '$') {
143 for (i
= 0; i
< ELEMENTSOF(map
); i
++) {
144 if (startswith(&from
[1], map
[i
].name
)) {
146 from
+= strlen(map
[i
].name
)+1;
150 } else if (from
[0] == '%') {
151 /* substitute format char */
154 if (from
[1] == '%') {
159 for (i
= 0; i
< ELEMENTSOF(map
); i
++) {
160 if (from
[1] == map
[i
].fmt
) {
179 /* extract possible $format{attr} */
180 if (from
[0] == '{') {
184 for (i
= 0; from
[i
] != '}'; i
++) {
185 if (from
[i
] == '\0') {
186 log_error("missing closing brace for format '%s'", src
);
190 if (i
>= sizeof(attrbuf
))
192 memcpy(attrbuf
, from
, i
);
202 l
= strpcpy(&s
, l
, udev_device_get_devpath(dev
));
205 l
= strpcpy(&s
, l
, udev_device_get_sysname(dev
));
207 case SUBST_KERNEL_NUMBER
:
208 if (udev_device_get_sysnum(dev
) == NULL
)
210 l
= strpcpy(&s
, l
, udev_device_get_sysnum(dev
));
213 if (event
->dev_parent
== NULL
)
215 l
= strpcpy(&s
, l
, udev_device_get_sysname(event
->dev_parent
));
220 if (event
->dev_parent
== NULL
)
223 driver
= udev_device_get_driver(event
->dev_parent
);
226 l
= strpcpy(&s
, l
, driver
);
230 char num
[UTIL_PATH_SIZE
];
232 sprintf(num
, "%u", major(udev_device_get_devnum(dev
)));
233 l
= strpcpy(&s
, l
, num
);
237 char num
[UTIL_PATH_SIZE
];
239 sprintf(num
, "%u", minor(udev_device_get_devnum(dev
)));
240 l
= strpcpy(&s
, l
, num
);
247 if (event
->program_result
== NULL
)
249 /* get part part of the result string */
252 i
= strtoul(attr
, &rest
, 10);
254 char result
[UTIL_PATH_SIZE
];
255 char tmp
[UTIL_PATH_SIZE
];
258 strscpy(result
, sizeof(result
), event
->program_result
);
261 while (cpos
[0] != '\0' && !isspace(cpos
[0]))
263 while (isspace(cpos
[0]))
269 log_error("requested part of result string not found");
272 strscpy(tmp
, sizeof(tmp
), cpos
);
273 /* %{2+}c copies the whole string from the second part on */
274 if (rest
[0] != '+') {
275 cpos
= strchr(tmp
, ' ');
279 l
= strpcpy(&s
, l
, tmp
);
281 l
= strpcpy(&s
, l
, event
->program_result
);
286 const char *value
= NULL
;
287 char vbuf
[UTIL_NAME_SIZE
];
292 log_error("missing file parameter for attr");
296 /* try to read the value specified by "[dmi/id]product_name" */
297 if (util_resolve_subsys_kernel(event
->udev
, attr
, vbuf
, sizeof(vbuf
), 1) == 0)
300 /* try to read the attribute the device */
302 value
= udev_device_get_sysattr_value(event
->dev
, attr
);
304 /* try to read the attribute of the parent device, other matches have selected */
305 if (value
== NULL
&& event
->dev_parent
!= NULL
&& event
->dev_parent
!= event
->dev
)
306 value
= udev_device_get_sysattr_value(event
->dev_parent
, attr
);
311 /* strip trailing whitespace, and replace unwanted characters */
313 strscpy(vbuf
, sizeof(vbuf
), value
);
315 while (len
> 0 && isspace(vbuf
[--len
]))
317 count
= util_replace_chars(vbuf
, UDEV_ALLOWED_CHARS_INPUT
);
319 log_debug("%i character(s) replaced" , count
);
320 l
= strpcpy(&s
, l
, vbuf
);
324 struct udev_device
*dev_parent
;
327 dev_parent
= udev_device_get_parent(event
->dev
);
328 if (dev_parent
== NULL
)
330 devnode
= udev_device_get_devnode(dev_parent
);
332 l
= strpcpy(&s
, l
, devnode
+ strlen("/dev/"));
336 if (udev_device_get_devnode(dev
) != NULL
)
337 l
= strpcpy(&s
, l
, udev_device_get_devnode(dev
));
340 if (event
->name
!= NULL
)
341 l
= strpcpy(&s
, l
, event
->name
);
342 else if (udev_device_get_devnode(dev
) != NULL
)
343 l
= strpcpy(&s
, l
, udev_device_get_devnode(dev
) + strlen("/dev/"));
345 l
= strpcpy(&s
, l
, udev_device_get_sysname(dev
));
348 struct udev_list_entry
*list_entry
;
350 list_entry
= udev_device_get_devlinks_list_entry(dev
);
351 if (list_entry
== NULL
)
353 l
= strpcpy(&s
, l
, udev_list_entry_get_name(list_entry
) + strlen("/dev/"));
354 udev_list_entry_foreach(list_entry
, udev_list_entry_get_next(list_entry
))
355 l
= strpcpyl(&s
, l
, " ", udev_list_entry_get_name(list_entry
) + strlen("/dev/"), NULL
);
359 l
= strpcpy(&s
, l
, "/dev");
362 l
= strpcpy(&s
, l
, "/sys");
370 value
= udev_device_get_property_value(event
->dev
, attr
);
373 l
= strpcpy(&s
, l
, value
);
377 log_error("unknown substitution type=%i", type
);
387 static int spawn_exec(struct udev_event
*event
,
388 const char *cmd
, char *const argv
[], char **envp
,
389 int fd_stdout
, int fd_stderr
) {
390 _cleanup_close_
int fd
= -1;
392 /* discard child output or connect to pipe */
393 fd
= open("/dev/null", O_RDWR
);
395 dup2(fd
, STDIN_FILENO
);
397 dup2(fd
, STDOUT_FILENO
);
399 dup2(fd
, STDERR_FILENO
);
401 log_error_errno(errno
, "open /dev/null failed: %m");
403 /* connect pipes to std{out,err} */
404 if (fd_stdout
>= 0) {
405 dup2(fd_stdout
, STDOUT_FILENO
);
406 safe_close(fd_stdout
);
408 if (fd_stderr
>= 0) {
409 dup2(fd_stderr
, STDERR_FILENO
);
410 safe_close(fd_stderr
);
413 /* terminate child in case parent goes away */
414 prctl(PR_SET_PDEATHSIG
, SIGTERM
);
416 /* restore sigmask before exec */
417 (void) reset_signal_mask();
419 execve(argv
[0], argv
, envp
);
422 log_error_errno(errno
, "failed to execute '%s' '%s': %m", argv
[0], cmd
);
427 static void spawn_read(struct udev_event
*event
,
430 int fd_stdout
, int fd_stderr
,
431 char *result
, size_t ressize
) {
432 _cleanup_close_
int fd_ep
= -1;
433 struct epoll_event ep_outpipe
= {
435 .data
.ptr
= &fd_stdout
,
437 struct epoll_event ep_errpipe
= {
439 .data
.ptr
= &fd_stderr
,
444 /* read from child if requested */
445 if (fd_stdout
< 0 && fd_stderr
< 0)
448 fd_ep
= epoll_create1(EPOLL_CLOEXEC
);
450 log_error_errno(errno
, "error creating epoll fd: %m");
454 if (fd_stdout
>= 0) {
455 r
= epoll_ctl(fd_ep
, EPOLL_CTL_ADD
, fd_stdout
, &ep_outpipe
);
457 log_error_errno(errno
, "fail to add stdout fd to epoll: %m");
462 if (fd_stderr
>= 0) {
463 r
= epoll_ctl(fd_ep
, EPOLL_CTL_ADD
, fd_stderr
, &ep_errpipe
);
465 log_error_errno(errno
, "fail to add stderr fd to epoll: %m");
470 /* read child output */
471 while (fd_stdout
>= 0 || fd_stderr
>= 0) {
474 struct epoll_event ev
[4];
477 if (timeout_usec
> 0) {
480 age_usec
= clock_boottime_or_monotonic() - event
->birth_usec
;
481 if (age_usec
>= timeout_usec
) {
482 log_error("timeout '%s'", cmd
);
485 timeout
= ((timeout_usec
- age_usec
) / USEC_PER_MSEC
) + MSEC_PER_SEC
;
490 fdcount
= epoll_wait(fd_ep
, ev
, ELEMENTSOF(ev
), timeout
);
494 log_error_errno(errno
, "failed to poll: %m");
496 } else if (fdcount
== 0) {
497 log_error("timeout '%s'", cmd
);
501 for (i
= 0; i
< fdcount
; i
++) {
502 int *fd
= (int *)ev
[i
].data
.ptr
;
507 if (ev
[i
].events
& EPOLLIN
) {
511 count
= read(*fd
, buf
, sizeof(buf
)-1);
516 /* store stdout result */
517 if (result
!= NULL
&& *fd
== fd_stdout
) {
518 if (respos
+ count
< ressize
) {
519 memcpy(&result
[respos
], buf
, count
);
522 log_error("'%s' ressize %zu too short", cmd
, ressize
);
526 /* log debug output only if we watch stderr */
527 if (fd_stderr
>= 0) {
532 while ((line
= strsep(&pos
, "\n"))) {
533 if (pos
!= NULL
|| line
[0] != '\0')
534 log_debug("'%s'(%s) '%s'", cmd
, *fd
== fd_stdout
? "out" : "err" , line
);
537 } else if (ev
[i
].events
& EPOLLHUP
) {
538 r
= epoll_ctl(fd_ep
, EPOLL_CTL_DEL
, *fd
, NULL
);
540 log_error_errno(errno
, "failed to remove fd from epoll: %m");
548 /* return the child's stdout string */
550 result
[respos
] = '\0';
553 static int on_spawn_timeout(sd_event_source
*s
, uint64_t usec
, void *userdata
) {
554 Spawn
*spawn
= userdata
;
555 char timeout
[FORMAT_TIMESTAMP_RELATIVE_MAX
];
559 kill_and_sigcont(spawn
->pid
, SIGKILL
);
561 log_error("spawned process '%s' ["PID_FMT
"] timed out after %s, killing", spawn
->cmd
, spawn
->pid
,
562 format_timestamp_relative(timeout
, sizeof(timeout
), spawn
->timeout
));
567 static int on_spawn_timeout_warning(sd_event_source
*s
, uint64_t usec
, void *userdata
) {
568 Spawn
*spawn
= userdata
;
569 char timeout
[FORMAT_TIMESTAMP_RELATIVE_MAX
];
573 log_warning("spawned process '%s' ["PID_FMT
"] is taking longer than %s to complete", spawn
->cmd
, spawn
->pid
,
574 format_timestamp_relative(timeout
, sizeof(timeout
), spawn
->timeout
));
579 static int on_spawn_sigchld(sd_event_source
*s
, const siginfo_t
*si
, void *userdata
) {
580 Spawn
*spawn
= userdata
;
584 switch (si
->si_code
) {
586 if (si
->si_status
!= 0)
587 log_warning("process '%s' failed with exit code %i.", spawn
->cmd
, si
->si_status
);
589 log_debug("process '%s' succeeded.", spawn
->cmd
);
590 sd_event_exit(sd_event_source_get_event(s
), 0);
598 log_warning("process '%s' terminated by signal %s.", spawn
->cmd
, signal_to_string(si
->si_status
));
602 log_error("process '%s' failed due to unknown reason.", spawn
->cmd
);
605 sd_event_exit(sd_event_source_get_event(s
), -EIO
);
610 static int spawn_wait(struct udev_event
*event
,
612 usec_t timeout_warn_usec
,
613 const char *cmd
, pid_t pid
) {
618 _cleanup_event_unref_ sd_event
*e
= NULL
;
621 r
= sd_event_new(&e
);
625 if (timeout_usec
> 0) {
626 usec_t usec
, age_usec
;
628 usec
= now(clock_boottime_or_monotonic());
629 age_usec
= usec
- event
->birth_usec
;
630 if (age_usec
< timeout_usec
) {
631 if (timeout_warn_usec
> 0 && timeout_warn_usec
< timeout_usec
&& age_usec
< timeout_warn_usec
) {
632 spawn
.timeout_warn
= timeout_warn_usec
- age_usec
;
634 r
= sd_event_add_time(e
, NULL
, clock_boottime_or_monotonic(),
635 usec
+ spawn
.timeout_warn
, USEC_PER_SEC
,
636 on_spawn_timeout_warning
, &spawn
);
641 spawn
.timeout
= timeout_usec
- age_usec
;
643 r
= sd_event_add_time(e
, NULL
, clock_boottime_or_monotonic(),
644 usec
+ spawn
.timeout
, USEC_PER_SEC
, on_spawn_timeout
, &spawn
);
650 r
= sd_event_add_child(e
, NULL
, pid
, WEXITED
, on_spawn_sigchld
, &spawn
);
654 r
= sd_event_loop(e
);
658 r
= sd_event_get_exit_code(e
, &ret
);
665 int udev_build_argv(struct udev
*udev
, char *cmd
, int *argc
, char *argv
[]) {
669 if (strchr(cmd
, ' ') == NULL
) {
675 while (pos
!= NULL
&& pos
[0] != '\0') {
676 if (pos
[0] == '\'') {
677 /* do not separate quotes */
679 argv
[i
] = strsep(&pos
, "\'");
681 while (pos
[0] == ' ')
684 argv
[i
] = strsep(&pos
, " ");
686 while (pos
[0] == ' ')
698 int udev_event_spawn(struct udev_event
*event
,
700 usec_t timeout_warn_usec
,
701 const char *cmd
, char **envp
,
702 char *result
, size_t ressize
) {
703 int outpipe
[2] = {-1, -1};
704 int errpipe
[2] = {-1, -1};
706 char arg
[UTIL_PATH_SIZE
];
708 char program
[UTIL_PATH_SIZE
];
711 strscpy(arg
, sizeof(arg
), cmd
);
712 udev_build_argv(event
->udev
, arg
, NULL
, argv
);
714 /* pipes from child to parent */
715 if (result
!= NULL
|| log_get_max_level() >= LOG_INFO
) {
716 if (pipe2(outpipe
, O_NONBLOCK
) != 0) {
718 log_error_errno(errno
, "pipe failed: %m");
722 if (log_get_max_level() >= LOG_INFO
) {
723 if (pipe2(errpipe
, O_NONBLOCK
) != 0) {
725 log_error_errno(errno
, "pipe failed: %m");
730 /* allow programs in /usr/lib/udev/ to be called without the path */
731 if (argv
[0][0] != '/') {
732 strscpyl(program
, sizeof(program
), UDEVLIBEXECDIR
"/", argv
[0], NULL
);
739 /* child closes parent's ends of pipes */
740 if (outpipe
[READ_END
] >= 0) {
741 close(outpipe
[READ_END
]);
742 outpipe
[READ_END
] = -1;
744 if (errpipe
[READ_END
] >= 0) {
745 close(errpipe
[READ_END
]);
746 errpipe
[READ_END
] = -1;
749 log_debug("starting '%s'", cmd
);
751 spawn_exec(event
, cmd
, argv
, envp
,
752 outpipe
[WRITE_END
], errpipe
[WRITE_END
]);
756 log_error_errno(errno
, "fork of '%s' failed: %m", cmd
);
760 /* parent closed child's ends of pipes */
761 if (outpipe
[WRITE_END
] >= 0) {
762 close(outpipe
[WRITE_END
]);
763 outpipe
[WRITE_END
] = -1;
765 if (errpipe
[WRITE_END
] >= 0) {
766 close(errpipe
[WRITE_END
]);
767 errpipe
[WRITE_END
] = -1;
773 outpipe
[READ_END
], errpipe
[READ_END
],
776 err
= spawn_wait(event
, timeout_usec
, timeout_warn_usec
, cmd
, pid
);
780 if (outpipe
[READ_END
] >= 0)
781 close(outpipe
[READ_END
]);
782 if (outpipe
[WRITE_END
] >= 0)
783 close(outpipe
[WRITE_END
]);
784 if (errpipe
[READ_END
] >= 0)
785 close(errpipe
[READ_END
]);
786 if (errpipe
[WRITE_END
] >= 0)
787 close(errpipe
[WRITE_END
]);
791 static int rename_netif(struct udev_event
*event
) {
792 struct udev_device
*dev
= event
->dev
;
797 oldname
= udev_device_get_sysname(dev
);
799 strscpy(name
, IFNAMSIZ
, event
->name
);
801 r
= rtnl_set_link_name(&event
->rtnl
, udev_device_get_ifindex(dev
), name
);
803 return log_error_errno(r
, "Error changing net interface name '%s' to '%s': %m", oldname
, name
);
805 log_debug("renamed network interface '%s' to '%s'", oldname
, name
);
810 void udev_event_execute_rules(struct udev_event
*event
,
811 usec_t timeout_usec
, usec_t timeout_warn_usec
,
812 struct udev_list
*properties_list
,
813 struct udev_rules
*rules
) {
814 struct udev_device
*dev
= event
->dev
;
816 if (udev_device_get_subsystem(dev
) == NULL
)
819 if (streq(udev_device_get_action(dev
), "remove")) {
820 udev_device_read_db(dev
);
821 udev_device_tag_index(dev
, NULL
, false);
822 udev_device_delete_db(dev
);
824 if (major(udev_device_get_devnum(dev
)) != 0)
825 udev_watch_end(event
->udev
, dev
);
827 udev_rules_apply_to_event(rules
, event
,
828 timeout_usec
, timeout_warn_usec
,
831 if (major(udev_device_get_devnum(dev
)) != 0)
832 udev_node_remove(dev
);
834 event
->dev_db
= udev_device_clone_with_db(dev
);
835 if (event
->dev_db
!= NULL
) {
836 /* disable watch during event processing */
837 if (major(udev_device_get_devnum(dev
)) != 0)
838 udev_watch_end(event
->udev
, event
->dev_db
);
841 if (major(udev_device_get_devnum(dev
)) == 0 &&
842 streq(udev_device_get_action(dev
), "move"))
843 udev_device_copy_properties(dev
, event
->dev_db
);
845 udev_rules_apply_to_event(rules
, event
,
846 timeout_usec
, timeout_warn_usec
,
849 /* rename a new network interface, if needed */
850 if (udev_device_get_ifindex(dev
) > 0 && streq(udev_device_get_action(dev
), "add") &&
851 event
->name
!= NULL
&& !streq(event
->name
, udev_device_get_sysname(dev
))) {
854 r
= rename_netif(event
);
856 log_warning_errno(r
, "could not rename interface '%d' from '%s' to '%s': %m", udev_device_get_ifindex(dev
),
857 udev_device_get_sysname(dev
), event
->name
);
859 r
= udev_device_rename(dev
, event
->name
);
861 log_warning_errno(r
, "renamed interface '%d' from '%s' to '%s', but could not update udev_device: %m",
862 udev_device_get_ifindex(dev
), udev_device_get_sysname(dev
), event
->name
);
864 log_debug("changed devpath to '%s'", udev_device_get_devpath(dev
));
868 if (major(udev_device_get_devnum(dev
)) > 0) {
871 /* remove/update possible left-over symlinks from old database entry */
872 if (event
->dev_db
!= NULL
)
873 udev_node_update_old_links(dev
, event
->dev_db
);
875 if (!event
->owner_set
)
876 event
->uid
= udev_device_get_devnode_uid(dev
);
878 if (!event
->group_set
)
879 event
->gid
= udev_device_get_devnode_gid(dev
);
881 if (!event
->mode_set
) {
882 if (udev_device_get_devnode_mode(dev
) > 0) {
883 /* kernel supplied value */
884 event
->mode
= udev_device_get_devnode_mode(dev
);
885 } else if (event
->gid
> 0) {
886 /* default 0660 if a group is assigned */
894 apply
= streq(udev_device_get_action(dev
), "add") || event
->owner_set
|| event
->group_set
|| event
->mode_set
;
895 udev_node_add(dev
, apply
, event
->mode
, event
->uid
, event
->gid
, &event
->seclabel_list
);
898 /* preserve old, or get new initialization timestamp */
899 udev_device_ensure_usec_initialized(event
->dev
, event
->dev_db
);
901 /* (re)write database file */
902 udev_device_tag_index(dev
, event
->dev_db
, true);
903 udev_device_update_db(dev
);
904 udev_device_set_is_initialized(dev
);
906 event
->dev_db
= udev_device_unref(event
->dev_db
);
910 void udev_event_execute_run(struct udev_event
*event
, usec_t timeout_usec
, usec_t timeout_warn_usec
) {
911 struct udev_list_entry
*list_entry
;
913 udev_list_entry_foreach(list_entry
, udev_list_get_entry(&event
->run_list
)) {
914 const char *cmd
= udev_list_entry_get_name(list_entry
);
915 enum udev_builtin_cmd builtin_cmd
= udev_list_entry_get_num(list_entry
);
917 if (builtin_cmd
< UDEV_BUILTIN_MAX
) {
918 char command
[UTIL_PATH_SIZE
];
920 udev_event_apply_format(event
, cmd
, command
, sizeof(command
));
921 udev_builtin_run(event
->dev
, builtin_cmd
, command
, false);
923 char program
[UTIL_PATH_SIZE
];
926 if (event
->exec_delay
> 0) {
927 log_debug("delay execution of '%s'", program
);
928 sleep(event
->exec_delay
);
931 udev_event_apply_format(event
, cmd
, program
, sizeof(program
));
932 envp
= udev_device_get_properties_envp(event
->dev
);
933 udev_event_spawn(event
, timeout_usec
, timeout_warn_usec
, program
, envp
, NULL
, 0);