]>
git.ipfire.org Git - thirdparty/systemd.git/blob - udev/udev-event.c
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
= udev_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 int 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
;
507 /* read from child if requested */
508 if (fd_stdout
< 0 && fd_stderr
< 0)
511 fd_ep
= epoll_create1(EPOLL_CLOEXEC
);
514 err(udev
, "error creating epoll fd: %m\n");
518 if (fd_stdout
>= 0) {
519 memset(&ep_outpipe
, 0, sizeof(struct epoll_event
));
520 ep_outpipe
.events
= EPOLLIN
;
521 ep_outpipe
.data
.ptr
= &fd_stdout
;
522 if (epoll_ctl(fd_ep
, EPOLL_CTL_ADD
, fd_stdout
, &ep_outpipe
) < 0) {
523 err(udev
, "fail to add fd to epoll: %m\n");
528 if (fd_stderr
>= 0) {
529 memset(&ep_errpipe
, 0, sizeof(struct epoll_event
));
530 ep_errpipe
.events
= EPOLLIN
;
531 ep_errpipe
.data
.ptr
= &fd_stderr
;
532 if (epoll_ctl(fd_ep
, EPOLL_CTL_ADD
, fd_stderr
, &ep_errpipe
) < 0) {
533 err(udev
, "fail to add fd to epoll: %m\n");
538 /* read child output */
539 while (fd_stdout
>= 0 || fd_stderr
>= 0) {
542 struct epoll_event ev
[4];
545 if (event
->timeout_usec
> 0) {
546 unsigned long long age_usec
;
548 age_usec
= now_usec() - event
->birth_usec
;
549 if (age_usec
>= event
->timeout_usec
) {
551 err(udev
, "timeout '%s'\n", cmd
);
554 timeout
= ((event
->timeout_usec
- age_usec
) / 1000) + 1000;
559 fdcount
= epoll_wait(fd_ep
, ev
, ARRAY_SIZE(ev
), timeout
);
564 err(udev
, "failed to poll: %m\n");
569 err(udev
, "timeout '%s'\n", cmd
);
573 for (i
= 0; i
< fdcount
; i
++) {
574 int *fd
= (int *)ev
[i
].data
.ptr
;
576 if (ev
[i
].events
& EPOLLIN
) {
580 count
= read(*fd
, buf
, sizeof(buf
)-1);
585 /* store stdout result */
586 if (result
!= NULL
&& *fd
== fd_stdout
) {
587 if (respos
+ count
< ressize
) {
588 memcpy(&result
[respos
], buf
, count
);
591 err(udev
, "'%s' ressize %zd too short\n", cmd
, ressize
);
596 /* log debug output only if we watch stderr */
597 if (fd_stderr
>= 0) {
602 while ((line
= strsep(&pos
, "\n"))) {
603 if (pos
!= NULL
|| line
[0] != '\0')
604 info(udev
, "'%s'(%s) '%s'\n", cmd
, *fd
== fd_stdout
? "out" : "err" , line
);
607 } else if (ev
[i
].events
& EPOLLHUP
) {
608 if (epoll_ctl(fd_ep
, EPOLL_CTL_DEL
, *fd
, NULL
) < 0) {
610 err(udev
, "failed to remove fd from epoll: %m\n");
618 /* return the child's stdout string */
619 if (result
!= NULL
) {
620 result
[respos
] = '\0';
621 dbg(udev
, "result='%s'\n", result
);
629 static int spawn_wait(struct udev_event
*event
, const char *cmd
, pid_t pid
)
631 struct udev
*udev
= event
->udev
;
632 struct pollfd pfd
[1];
635 pfd
[0].events
= POLLIN
;
636 pfd
[0].fd
= event
->fd_signal
;
642 if (event
->timeout_usec
> 0) {
643 unsigned long long age_usec
;
645 age_usec
= now_usec() - event
->birth_usec
;
646 if (age_usec
>= event
->timeout_usec
)
649 timeout
= ((event
->timeout_usec
- age_usec
) / 1000) + 1000;
654 fdcount
= poll(pfd
, 1, timeout
);
659 err(udev
, "failed to poll: %m\n");
663 err(udev
, "timeout: killing '%s' [%u]\n", cmd
, pid
);
667 if (pfd
[0].revents
& POLLIN
) {
668 struct signalfd_siginfo fdsi
;
672 size
= read(event
->fd_signal
, &fdsi
, sizeof(struct signalfd_siginfo
));
673 if (size
!= sizeof(struct signalfd_siginfo
))
676 switch (fdsi
.ssi_signo
) {
678 event
->sigterm
= true;
681 if (waitpid(pid
, &status
, WNOHANG
) < 0)
683 if (WIFEXITED(status
)) {
684 info(udev
, "'%s' [%u] exit with return code %i\n", cmd
, pid
, WEXITSTATUS(status
));
685 if (WEXITSTATUS(status
) != 0)
687 } else if (WIFSIGNALED(status
)) {
688 err(udev
, "'%s' [%u] terminated by signal %i (%s)\n", cmd
, pid
, WTERMSIG(status
), strsignal(WTERMSIG(status
)));
690 } else if (WIFSTOPPED(status
)) {
691 err(udev
, "'%s' [%u] stopped\n", cmd
, pid
);
693 } else if (WIFCONTINUED(status
)) {
694 err(udev
, "'%s' [%u] continued\n", cmd
, pid
);
697 err(udev
, "'%s' [%u] exit with status 0x%04x\n", cmd
, pid
, status
);
709 int udev_event_spawn(struct udev_event
*event
,
710 const char *cmd
, char **envp
, const sigset_t
*sigmask
,
711 char *result
, size_t ressize
)
713 struct udev
*udev
= event
->udev
;
714 int outpipe
[2] = {-1, -1};
715 int errpipe
[2] = {-1, -1};
717 char arg
[UTIL_PATH_SIZE
];
718 char program
[UTIL_PATH_SIZE
];
719 char *argv
[((sizeof(arg
) + 1) / 2) + 1];
723 /* build argv from command */
724 util_strscpy(arg
, sizeof(arg
), cmd
);
726 if (strchr(arg
, ' ') != NULL
) {
729 while (pos
!= NULL
&& pos
[0] != '\0') {
730 if (pos
[0] == '\'') {
731 /* do not separate quotes */
733 argv
[i
] = strsep(&pos
, "\'");
735 while (pos
[0] == ' ')
738 argv
[i
] = strsep(&pos
, " ");
740 while (pos
[0] == ' ')
743 dbg(udev
, "arg[%i] '%s'\n", i
, argv
[i
]);
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 /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 err
= 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 err
= udev_node_add(dev
, event
->mode
, event
->uid
, event
->gid
);
1036 /* preserve old, or get new initialization timestamp */
1037 if (event
->dev_db
!= NULL
&& udev_device_get_usec_initialized(event
->dev_db
) > 0)
1038 udev_device_set_usec_initialized(event
->dev
, udev_device_get_usec_initialized(event
->dev_db
));
1040 udev_device_set_usec_initialized(event
->dev
, now_usec());
1042 /* (re)write database file */
1043 udev_device_update_db(dev
);
1044 udev_device_tag_index(dev
, event
->dev_db
, true);
1045 udev_device_set_is_initialized(dev
);
1047 udev_device_unref(event
->dev_db
);
1048 event
->dev_db
= NULL
;
1054 int udev_event_execute_run(struct udev_event
*event
, const sigset_t
*sigmask
)
1056 struct udev_list_entry
*list_entry
;
1059 dbg(event
->udev
, "executing run list\n");
1060 udev_list_entry_foreach(list_entry
, udev_list_get_entry(&event
->run_list
)) {
1061 const char *cmd
= udev_list_entry_get_name(list_entry
);
1063 if (strncmp(cmd
, "socket:", strlen("socket:")) == 0) {
1064 struct udev_monitor
*monitor
;
1066 monitor
= udev_monitor_new_from_socket(event
->udev
, &cmd
[strlen("socket:")]);
1067 if (monitor
== NULL
)
1069 udev_monitor_send_device(monitor
, NULL
, event
->dev
);
1070 udev_monitor_unref(monitor
);
1072 char program
[UTIL_PATH_SIZE
];
1075 if (event
->exec_delay
> 0) {
1076 info(event
->udev
, "delay execution of '%s'\n", program
);
1077 sleep(event
->exec_delay
);
1080 udev_event_apply_format(event
, cmd
, program
, sizeof(program
));
1081 envp
= udev_device_get_properties_envp(event
->dev
);
1082 if (udev_event_spawn(event
, program
, envp
, sigmask
, NULL
, 0) < 0) {
1083 if (udev_list_entry_get_num(list_entry
))