2 * libudev - interface to udev device information
4 * Copyright (C) 2008-2010 Kay Sievers <kay.sievers@vrfy.org>
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
24 #include <sys/ioctl.h>
25 #include <sys/socket.h>
26 #include <linux/sockios.h>
29 #include "libudev-private.h"
32 * SECTION:libudev-device
33 * @short_description: kernel sys devices
35 * Representation of kernel sys devices. Devices are uniquely identified
36 * by their syspath, every device has exactly one path in the kernel sys
37 * filesystem. Devices usually belong to a kernel subsystem, and and have
38 * a unique name inside that subsystem.
44 * Opaque object representing one kernel sys device.
48 struct udev_device
*parent_device
;
63 size_t monitor_buf_len
;
64 struct udev_list devlinks_list
;
65 struct udev_list properties_list
;
66 struct udev_list sysattr_value_list
;
67 struct udev_list sysattr_list
;
68 struct udev_list tags_list
;
69 unsigned long long int seqnum
;
70 unsigned long long int usec_initialized
;
80 bool devlinks_uptodate
;
88 bool sysattr_list_read
;
93 * udev_device_get_seqnum:
94 * @udev_device: udev device
96 * This is only valid if the device was received through a monitor. Devices read from
97 * sys do not have a sequence number.
99 * Returns: the kernel event sequence number, or 0 if there is no sequence number available.
101 _public_
unsigned long long int udev_device_get_seqnum(struct udev_device
*udev_device
)
103 if (udev_device
== NULL
)
105 return udev_device
->seqnum
;
108 static int udev_device_set_seqnum(struct udev_device
*udev_device
, unsigned long long int seqnum
)
112 udev_device
->seqnum
= seqnum
;
113 snprintf(num
, sizeof(num
), "%llu", seqnum
);
114 udev_device_add_property(udev_device
, "SEQNUM", num
);
118 int udev_device_get_ifindex(struct udev_device
*udev_device
)
120 if (!udev_device
->info_loaded
)
121 udev_device_read_uevent_file(udev_device
);
122 return udev_device
->ifindex
;
125 static int udev_device_set_ifindex(struct udev_device
*udev_device
, int ifindex
)
129 udev_device
->ifindex
= ifindex
;
130 snprintf(num
, sizeof(num
), "%u", ifindex
);
131 udev_device_add_property(udev_device
, "IFINDEX", num
);
136 * udev_device_get_devnum:
137 * @udev_device: udev device
139 * Get the device major/minor number.
141 * Returns: the dev_t number.
143 _public_ dev_t
udev_device_get_devnum(struct udev_device
*udev_device
)
145 if (udev_device
== NULL
)
146 return makedev(0, 0);
147 if (!udev_device
->info_loaded
)
148 udev_device_read_uevent_file(udev_device
);
149 return udev_device
->devnum
;
152 static int udev_device_set_devnum(struct udev_device
*udev_device
, dev_t devnum
)
156 udev_device
->devnum
= devnum
;
158 snprintf(num
, sizeof(num
), "%u", major(devnum
));
159 udev_device_add_property(udev_device
, "MAJOR", num
);
160 snprintf(num
, sizeof(num
), "%u", minor(devnum
));
161 udev_device_add_property(udev_device
, "MINOR", num
);
165 const char *udev_device_get_devpath_old(struct udev_device
*udev_device
)
167 return udev_device
->devpath_old
;
170 static int udev_device_set_devpath_old(struct udev_device
*udev_device
, const char *devpath_old
)
174 free(udev_device
->devpath_old
);
175 udev_device
->devpath_old
= strdup(devpath_old
);
176 if (udev_device
->devpath_old
== NULL
)
178 udev_device_add_property(udev_device
, "DEVPATH_OLD", udev_device
->devpath_old
);
180 pos
= strrchr(udev_device
->devpath_old
, '/');
187 * udev_device_get_driver:
188 * @udev_device: udev device
190 * Get the kernel driver name.
192 * Returns: the driver name string, or #NULL if there is no driver attached.
194 _public_
const char *udev_device_get_driver(struct udev_device
*udev_device
)
196 char driver
[UTIL_NAME_SIZE
];
198 if (udev_device
== NULL
)
200 if (!udev_device
->driver_set
) {
201 udev_device
->driver_set
= true;
202 if (util_get_sys_core_link_value(udev_device
->udev
, "driver", udev_device
->syspath
, driver
, sizeof(driver
)) > 0)
203 udev_device
->driver
= strdup(driver
);
205 return udev_device
->driver
;
208 static int udev_device_set_driver(struct udev_device
*udev_device
, const char *driver
)
210 free(udev_device
->driver
);
211 udev_device
->driver
= strdup(driver
);
212 if (udev_device
->driver
== NULL
)
214 udev_device
->driver_set
= true;
215 udev_device_add_property(udev_device
, "DRIVER", udev_device
->driver
);
220 * udev_device_get_devtype:
221 * @udev_device: udev device
223 * Retrieve the devtype string of the udev device.
225 * Returns: the devtype name of the udev device, or #NULL if it can not be determined
227 _public_
const char *udev_device_get_devtype(struct udev_device
*udev_device
)
229 if (udev_device
== NULL
)
231 if (!udev_device
->devtype_set
) {
232 udev_device
->devtype_set
= true;
233 udev_device_read_uevent_file(udev_device
);
235 return udev_device
->devtype
;
238 static int udev_device_set_devtype(struct udev_device
*udev_device
, const char *devtype
)
240 free(udev_device
->devtype
);
241 udev_device
->devtype
= strdup(devtype
);
242 if (udev_device
->devtype
== NULL
)
244 udev_device
->devtype_set
= true;
245 udev_device_add_property(udev_device
, "DEVTYPE", udev_device
->devtype
);
249 static int udev_device_set_subsystem(struct udev_device
*udev_device
, const char *subsystem
)
251 free(udev_device
->subsystem
);
252 udev_device
->subsystem
= strdup(subsystem
);
253 if (udev_device
->subsystem
== NULL
)
255 udev_device
->subsystem_set
= true;
256 udev_device_add_property(udev_device
, "SUBSYSTEM", udev_device
->subsystem
);
261 * udev_device_get_subsystem:
262 * @udev_device: udev device
264 * Retrieve the subsystem string of the udev device. The string does not
267 * Returns: the subsystem name of the udev device, or #NULL if it can not be determined
269 _public_
const char *udev_device_get_subsystem(struct udev_device
*udev_device
)
271 char subsystem
[UTIL_NAME_SIZE
];
273 if (udev_device
== NULL
)
275 if (!udev_device
->subsystem_set
) {
276 udev_device
->subsystem_set
= true;
277 /* read "subsystem" link */
278 if (util_get_sys_core_link_value(udev_device
->udev
, "subsystem", udev_device
->syspath
, subsystem
, sizeof(subsystem
)) > 0) {
279 udev_device_set_subsystem(udev_device
, subsystem
);
280 return udev_device
->subsystem
;
283 if (startswith(udev_device
->devpath
, "/module/")) {
284 udev_device_set_subsystem(udev_device
, "module");
285 return udev_device
->subsystem
;
287 if (strstr(udev_device
->devpath
, "/drivers/") != NULL
) {
288 udev_device_set_subsystem(udev_device
, "drivers");
289 return udev_device
->subsystem
;
291 if (startswith(udev_device
->devpath
, "/subsystem/") ||
292 startswith(udev_device
->devpath
, "/class/") ||
293 startswith(udev_device
->devpath
, "/bus/")) {
294 udev_device_set_subsystem(udev_device
, "subsystem");
295 return udev_device
->subsystem
;
298 return udev_device
->subsystem
;
301 mode_t
udev_device_get_devnode_mode(struct udev_device
*udev_device
)
303 if (!udev_device
->info_loaded
)
304 udev_device_read_uevent_file(udev_device
);
305 return udev_device
->devnode_mode
;
308 static int udev_device_set_devnode_mode(struct udev_device
*udev_device
, mode_t mode
)
312 udev_device
->devnode_mode
= mode
;
313 snprintf(num
, sizeof(num
), "%#o", mode
);
314 udev_device_add_property(udev_device
, "DEVMODE", num
);
318 struct udev_list_entry
*udev_device_add_property(struct udev_device
*udev_device
, const char *key
, const char *value
)
320 udev_device
->envp_uptodate
= false;
322 struct udev_list_entry
*list_entry
;
324 list_entry
= udev_device_get_properties_list_entry(udev_device
);
325 list_entry
= udev_list_entry_get_by_name(list_entry
, key
);
326 if (list_entry
!= NULL
)
327 udev_list_entry_delete(list_entry
);
330 return udev_list_entry_add(&udev_device
->properties_list
, key
, value
);
333 static struct udev_list_entry
*udev_device_add_property_from_string(struct udev_device
*udev_device
, const char *property
)
335 char name
[UTIL_LINE_SIZE
];
338 util_strscpy(name
, sizeof(name
), property
);
339 val
= strchr(name
, '=');
346 return udev_device_add_property(udev_device
, name
, val
);
350 * parse property string, and if needed, update internal values accordingly
352 * udev_device_add_property_from_string_parse_finish() needs to be
353 * called after adding properties, and its return value checked
355 * udev_device_set_info_loaded() needs to be set, to avoid trying
356 * to use a device without a DEVPATH set
358 void udev_device_add_property_from_string_parse(struct udev_device
*udev_device
, const char *property
)
360 if (startswith(property
, "DEVPATH=")) {
361 char path
[UTIL_PATH_SIZE
];
363 util_strscpyl(path
, sizeof(path
), "/sys", &property
[8], NULL
);
364 udev_device_set_syspath(udev_device
, path
);
365 } else if (startswith(property
, "SUBSYSTEM=")) {
366 udev_device_set_subsystem(udev_device
, &property
[10]);
367 } else if (startswith(property
, "DEVTYPE=")) {
368 udev_device_set_devtype(udev_device
, &property
[8]);
369 } else if (startswith(property
, "DEVNAME=")) {
370 udev_device_set_devnode(udev_device
, &property
[8]);
371 } else if (startswith(property
, "DEVLINKS=")) {
372 char devlinks
[UTIL_PATH_SIZE
];
376 util_strscpy(devlinks
, sizeof(devlinks
), &property
[9]);
378 next
= strchr(slink
, ' ');
379 while (next
!= NULL
) {
381 udev_device_add_devlink(udev_device
, slink
, 0);
383 next
= strchr(slink
, ' ');
385 if (slink
[0] != '\0')
386 udev_device_add_devlink(udev_device
, slink
, 0);
387 } else if (startswith(property
, "TAGS=")) {
388 char tags
[UTIL_PATH_SIZE
];
391 util_strscpy(tags
, sizeof(tags
), &property
[5]);
392 next
= strchr(tags
, ':');
395 while (next
[0] != '\0') {
399 next
= strchr(tag
, ':');
404 udev_device_add_tag(udev_device
, tag
);
407 } else if (startswith(property
, "USEC_INITIALIZED=")) {
408 udev_device_set_usec_initialized(udev_device
, strtoull(&property
[19], NULL
, 10));
409 } else if (startswith(property
, "DRIVER=")) {
410 udev_device_set_driver(udev_device
, &property
[7]);
411 } else if (startswith(property
, "ACTION=")) {
412 udev_device_set_action(udev_device
, &property
[7]);
413 } else if (startswith(property
, "MAJOR=")) {
414 udev_device
->maj
= strtoull(&property
[6], NULL
, 10);
415 } else if (startswith(property
, "MINOR=")) {
416 udev_device
->min
= strtoull(&property
[6], NULL
, 10);
417 } else if (startswith(property
, "DEVPATH_OLD=")) {
418 udev_device_set_devpath_old(udev_device
, &property
[12]);
419 } else if (startswith(property
, "SEQNUM=")) {
420 udev_device_set_seqnum(udev_device
, strtoull(&property
[7], NULL
, 10));
421 } else if (startswith(property
, "IFINDEX=")) {
422 udev_device_set_ifindex(udev_device
, strtoull(&property
[8], NULL
, 10));
423 } else if (startswith(property
, "DEVMODE=")) {
424 udev_device_set_devnode_mode(udev_device
, strtoul(&property
[8], NULL
, 8));
426 udev_device_add_property_from_string(udev_device
, property
);
430 int udev_device_add_property_from_string_parse_finish(struct udev_device
*udev_device
)
432 if (udev_device
->maj
> 0)
433 udev_device_set_devnum(udev_device
, makedev(udev_device
->maj
, udev_device
->min
));
434 udev_device
->maj
= 0;
435 udev_device
->min
= 0;
437 if (udev_device
->devpath
== NULL
|| udev_device
->subsystem
== NULL
)
443 * udev_device_get_property_value:
444 * @udev_device: udev device
445 * @key: property name
447 * Get the value of a given property.
449 * Returns: the property string, or #NULL if there is no such property.
451 _public_
const char *udev_device_get_property_value(struct udev_device
*udev_device
, const char *key
)
453 struct udev_list_entry
*list_entry
;
455 if (udev_device
== NULL
)
460 list_entry
= udev_device_get_properties_list_entry(udev_device
);
461 list_entry
= udev_list_entry_get_by_name(list_entry
, key
);
462 return udev_list_entry_get_value(list_entry
);
465 int udev_device_read_db(struct udev_device
*udev_device
, const char *dbfile
)
467 char filename
[UTIL_PATH_SIZE
];
468 char line
[UTIL_LINE_SIZE
];
471 /* providing a database file will always force-load it */
472 if (dbfile
== NULL
) {
475 if (udev_device
->db_loaded
)
477 udev_device
->db_loaded
= true;
479 id
= udev_device_get_id_filename(udev_device
);
482 util_strscpyl(filename
, sizeof(filename
), "/run/udev/data/", id
, NULL
);
486 f
= fopen(dbfile
, "re");
488 udev_dbg(udev_device
->udev
, "no db file to read %s: %m\n", dbfile
);
491 udev_device
->is_initialized
= true;
493 while (fgets(line
, sizeof(line
), f
)) {
496 struct udev_list_entry
*entry
;
505 util_strscpyl(filename
, sizeof(filename
), "/dev/", val
, NULL
);
506 udev_device_add_devlink(udev_device
, filename
, 0);
509 udev_device_set_devlink_priority(udev_device
, atoi(val
));
512 entry
= udev_device_add_property_from_string(udev_device
, val
);
513 udev_list_entry_set_num(entry
, true);
516 udev_device_add_tag(udev_device
, val
);
519 udev_device_set_watch_handle(udev_device
, atoi(val
));
522 udev_device_set_usec_initialized(udev_device
, strtoull(val
, NULL
, 10));
528 udev_dbg(udev_device
->udev
, "device %p filled with db file data\n", udev_device
);
532 int udev_device_read_uevent_file(struct udev_device
*udev_device
)
534 char filename
[UTIL_PATH_SIZE
];
536 char line
[UTIL_LINE_SIZE
];
540 if (udev_device
->uevent_loaded
)
543 util_strscpyl(filename
, sizeof(filename
), udev_device
->syspath
, "/uevent", NULL
);
544 f
= fopen(filename
, "re");
547 udev_device
->uevent_loaded
= true;
549 while (fgets(line
, sizeof(line
), f
)) {
552 pos
= strchr(line
, '\n');
557 if (startswith(line
, "DEVTYPE=")) {
558 udev_device_set_devtype(udev_device
, &line
[8]);
561 if (startswith(line
, "IFINDEX=")) {
562 udev_device_set_ifindex(udev_device
, strtoull(&line
[8], NULL
, 10));
565 if (startswith(line
, "DEVNAME=")) {
566 udev_device_set_devnode(udev_device
, &line
[8]);
570 if (startswith(line
, "MAJOR="))
571 maj
= strtoull(&line
[6], NULL
, 10);
572 else if (startswith(line
, "MINOR="))
573 min
= strtoull(&line
[6], NULL
, 10);
574 else if (startswith(line
, "DEVMODE="))
575 udev_device
->devnode_mode
= strtoul(&line
[8], NULL
, 8);
577 udev_device_add_property_from_string(udev_device
, line
);
580 udev_device
->devnum
= makedev(maj
, min
);
585 void udev_device_set_info_loaded(struct udev_device
*device
)
587 device
->info_loaded
= true;
590 struct udev_device
*udev_device_new(struct udev
*udev
)
592 struct udev_device
*udev_device
;
593 struct udev_list_entry
*list_entry
;
598 udev_device
= calloc(1, sizeof(struct udev_device
));
599 if (udev_device
== NULL
)
601 udev_device
->refcount
= 1;
602 udev_device
->udev
= udev
;
603 udev_list_init(udev
, &udev_device
->devlinks_list
, true);
604 udev_list_init(udev
, &udev_device
->properties_list
, true);
605 udev_list_init(udev
, &udev_device
->sysattr_value_list
, true);
606 udev_list_init(udev
, &udev_device
->sysattr_list
, false);
607 udev_list_init(udev
, &udev_device
->tags_list
, true);
608 udev_device
->watch_handle
= -1;
609 /* copy global properties */
610 udev_list_entry_foreach(list_entry
, udev_get_properties_list_entry(udev
))
611 udev_device_add_property(udev_device
,
612 udev_list_entry_get_name(list_entry
),
613 udev_list_entry_get_value(list_entry
));
618 * udev_device_new_from_syspath:
619 * @udev: udev library context
620 * @syspath: sys device path including sys directory
622 * Create new udev device, and fill in information from the sys
623 * device and the udev database entry. The syspath is the absolute
624 * path to the device, including the sys mount point.
626 * The initial refcount is 1, and needs to be decremented to
627 * release the resources of the udev device.
629 * Returns: a new udev device, or #NULL, if it does not exist
631 _public_
struct udev_device
*udev_device_new_from_syspath(struct udev
*udev
, const char *syspath
)
634 char path
[UTIL_PATH_SIZE
];
637 struct udev_device
*udev_device
;
644 /* path starts in sys */
645 if (!startswith(syspath
, "/sys")) {
646 udev_dbg(udev
, "not in sys :%s\n", syspath
);
650 /* path is not a root directory */
651 subdir
= syspath
+ strlen("/sys");
652 pos
= strrchr(subdir
, '/');
653 if (pos
== NULL
|| pos
[1] == '\0' || pos
< &subdir
[2])
656 /* resolve possible symlink to real path */
657 util_strscpy(path
, sizeof(path
), syspath
);
658 util_resolve_sys_link(udev
, path
, sizeof(path
));
660 if (startswith(path
+ strlen("/sys"), "/devices/")) {
661 char file
[UTIL_PATH_SIZE
];
663 /* all "devices" require a "uevent" file */
664 util_strscpyl(file
, sizeof(file
), path
, "/uevent", NULL
);
665 if (stat(file
, &statbuf
) != 0)
668 /* everything else just needs to be a directory */
669 if (stat(path
, &statbuf
) != 0 || !S_ISDIR(statbuf
.st_mode
))
673 udev_device
= udev_device_new(udev
);
674 if (udev_device
== NULL
)
677 udev_device_set_syspath(udev_device
, path
);
678 udev_dbg(udev
, "device %p has devpath '%s'\n", udev_device
, udev_device_get_devpath(udev_device
));
684 * udev_device_new_from_devnum:
685 * @udev: udev library context
686 * @type: char or block device
687 * @devnum: device major/minor number
689 * Create new udev device, and fill in information from the sys
690 * device and the udev database entry. The device is looked-up
691 * by its major/minor number and type. Character and block device
692 * numbers are not unique across the two types.
694 * The initial refcount is 1, and needs to be decremented to
695 * release the resources of the udev device.
697 * Returns: a new udev device, or #NULL, if it does not exist
699 _public_
struct udev_device
*udev_device_new_from_devnum(struct udev
*udev
, char type
, dev_t devnum
)
701 char path
[UTIL_PATH_SIZE
];
702 const char *type_str
;
706 else if (type
== 'c')
711 /* use /sys/dev/{block,char}/<maj>:<min> link */
712 snprintf(path
, sizeof(path
), "/sys/dev/%s/%u:%u",
713 type_str
, major(devnum
), minor(devnum
));
714 return udev_device_new_from_syspath(udev
, path
);
717 struct udev_device
*udev_device_new_from_id_filename(struct udev
*udev
, char *id
)
721 char subsys
[UTIL_PATH_SIZE
];
727 if (sscanf(id
, "%c%i:%i", &type
, &maj
, &min
) != 3)
729 return udev_device_new_from_devnum(udev
, type
, makedev(maj
, min
));
733 struct udev_device
*dev
;
736 ifindex
= strtoul(&id
[1], NULL
, 10);
740 sk
= socket(PF_INET
, SOCK_DGRAM
, 0);
743 memset(&ifr
, 0x00, sizeof(struct ifreq
));
744 ifr
.ifr_ifindex
= ifindex
;
745 if (ioctl(sk
, SIOCGIFNAME
, &ifr
) != 0) {
751 dev
= udev_device_new_from_subsystem_sysname(udev
, "net", ifr
.ifr_name
);
754 if (udev_device_get_ifindex(dev
) == ifindex
)
756 udev_device_unref(dev
);
760 util_strscpy(subsys
, sizeof(subsys
), &id
[1]);
761 sysname
= strchr(subsys
, ':');
765 sysname
= &sysname
[1];
766 return udev_device_new_from_subsystem_sysname(udev
, subsys
, sysname
);
773 * udev_device_new_from_subsystem_sysname:
774 * @udev: udev library context
775 * @subsystem: the subsystem of the device
776 * @sysname: the name of the device
778 * Create new udev device, and fill in information from the sys device
779 * and the udev database entry. The device is looked up by the subsystem
780 * and name string of the device, like "mem" / "zero", or "block" / "sda".
782 * The initial refcount is 1, and needs to be decremented to
783 * release the resources of the udev device.
785 * Returns: a new udev device, or #NULL, if it does not exist
787 _public_
struct udev_device
*udev_device_new_from_subsystem_sysname(struct udev
*udev
, const char *subsystem
, const char *sysname
)
789 char path
[UTIL_PATH_SIZE
];
792 if (streq(subsystem
, "subsystem")) {
793 util_strscpyl(path
, sizeof(path
), "/sys/subsystem/", sysname
, NULL
);
794 if (stat(path
, &statbuf
) == 0)
797 util_strscpyl(path
, sizeof(path
), "/sys/bus/", sysname
, NULL
);
798 if (stat(path
, &statbuf
) == 0)
801 util_strscpyl(path
, sizeof(path
), "/sys/class/", sysname
, NULL
);
802 if (stat(path
, &statbuf
) == 0)
807 if (streq(subsystem
, "module")) {
808 util_strscpyl(path
, sizeof(path
), "/sys/module/", sysname
, NULL
);
809 if (stat(path
, &statbuf
) == 0)
814 if (streq(subsystem
, "drivers")) {
815 char subsys
[UTIL_NAME_SIZE
];
818 util_strscpy(subsys
, sizeof(subsys
), sysname
);
819 driver
= strchr(subsys
, ':');
820 if (driver
!= NULL
) {
824 util_strscpyl(path
, sizeof(path
), "/sys/subsystem/", subsys
, "/drivers/", driver
, NULL
);
825 if (stat(path
, &statbuf
) == 0)
828 util_strscpyl(path
, sizeof(path
), "/sys/bus/", subsys
, "/drivers/", driver
, NULL
);
829 if (stat(path
, &statbuf
) == 0)
835 util_strscpyl(path
, sizeof(path
), "/sys/subsystem/", subsystem
, "/devices/", sysname
, NULL
);
836 if (stat(path
, &statbuf
) == 0)
839 util_strscpyl(path
, sizeof(path
), "/sys/bus/", subsystem
, "/devices/", sysname
, NULL
);
840 if (stat(path
, &statbuf
) == 0)
843 util_strscpyl(path
, sizeof(path
), "/sys/class/", subsystem
, "/", sysname
, NULL
);
844 if (stat(path
, &statbuf
) == 0)
849 return udev_device_new_from_syspath(udev
, path
);
853 * udev_device_new_from_environment
854 * @udev: udev library context
856 * Create new udev device, and fill in information from the
857 * current process environment. This only works reliable if
858 * the process is called from a udev rule. It is usually used
859 * for tools executed from IMPORT= rules.
861 * The initial refcount is 1, and needs to be decremented to
862 * release the resources of the udev device.
864 * Returns: a new udev device, or #NULL, if it does not exist
866 _public_
struct udev_device
*udev_device_new_from_environment(struct udev
*udev
)
869 struct udev_device
*udev_device
;
871 udev_device
= udev_device_new(udev
);
872 if (udev_device
== NULL
)
874 udev_device_set_info_loaded(udev_device
);
876 for (i
= 0; environ
[i
] != NULL
; i
++)
877 udev_device_add_property_from_string_parse(udev_device
, environ
[i
]);
879 if (udev_device_add_property_from_string_parse_finish(udev_device
) < 0) {
880 udev_dbg(udev
, "missing values, invalid device\n");
881 udev_device_unref(udev_device
);
888 static struct udev_device
*device_new_from_parent(struct udev_device
*udev_device
)
890 struct udev_device
*udev_device_parent
= NULL
;
891 char path
[UTIL_PATH_SIZE
];
894 util_strscpy(path
, sizeof(path
), udev_device
->syspath
);
895 subdir
= path
+ strlen("/sys/");
899 pos
= strrchr(subdir
, '/');
900 if (pos
== NULL
|| pos
< &subdir
[2])
903 udev_device_parent
= udev_device_new_from_syspath(udev_device
->udev
, path
);
904 if (udev_device_parent
!= NULL
)
905 return udev_device_parent
;
911 * udev_device_get_parent:
912 * @udev_device: the device to start searching from
914 * Find the next parent device, and fill in information from the sys
915 * device and the udev database entry.
917 * The returned the device is not referenced. It is attached to the
918 * child device, and will be cleaned up when the child device
921 * It is not necessarily just the upper level directory, empty or not
922 * recognized sys directories are ignored.
924 * It can be called as many times as needed, without caring about
927 * Returns: a new udev device, or #NULL, if it no parent exist.
929 _public_
struct udev_device
*udev_device_get_parent(struct udev_device
*udev_device
)
931 if (udev_device
== NULL
)
933 if (!udev_device
->parent_set
) {
934 udev_device
->parent_set
= true;
935 udev_device
->parent_device
= device_new_from_parent(udev_device
);
937 return udev_device
->parent_device
;
941 * udev_device_get_parent_with_subsystem_devtype:
942 * @udev_device: udev device to start searching from
943 * @subsystem: the subsystem of the device
944 * @devtype: the type (DEVTYPE) of the device
946 * Find the next parent device, with a matching subsystem and devtype
947 * value, and fill in information from the sys device and the udev
950 * If devtype is #NULL, only subsystem is checked, and any devtype will
953 * The returned the device is not referenced. It is attached to the
954 * child device, and will be cleaned up when the child device
957 * It can be called as many times as needed, without caring about
960 * Returns: a new udev device, or #NULL if no matching parent exists.
962 _public_
struct udev_device
*udev_device_get_parent_with_subsystem_devtype(struct udev_device
*udev_device
, const char *subsystem
, const char *devtype
)
964 struct udev_device
*parent
;
966 if (subsystem
== NULL
)
969 parent
= udev_device_get_parent(udev_device
);
970 while (parent
!= NULL
) {
971 const char *parent_subsystem
;
972 const char *parent_devtype
;
974 parent_subsystem
= udev_device_get_subsystem(parent
);
975 if (parent_subsystem
!= NULL
&& streq(parent_subsystem
, subsystem
)) {
978 parent_devtype
= udev_device_get_devtype(parent
);
979 if (parent_devtype
!= NULL
&& streq(parent_devtype
, devtype
))
982 parent
= udev_device_get_parent(parent
);
988 * udev_device_get_udev:
989 * @udev_device: udev device
991 * Retrieve the udev library context the device was created with.
993 * Returns: the udev library context
995 _public_
struct udev
*udev_device_get_udev(struct udev_device
*udev_device
)
997 if (udev_device
== NULL
)
999 return udev_device
->udev
;
1004 * @udev_device: udev device
1006 * Take a reference of a udev device.
1008 * Returns: the passed udev device
1010 _public_
struct udev_device
*udev_device_ref(struct udev_device
*udev_device
)
1012 if (udev_device
== NULL
)
1014 udev_device
->refcount
++;
1019 * udev_device_unref:
1020 * @udev_device: udev device
1022 * Drop a reference of a udev device. If the refcount reaches zero,
1023 * the resources of the device will be released.
1025 * Returns: the passed udev device if it has still an active reference, or #NULL otherwise.
1027 _public_
struct udev_device
*udev_device_unref(struct udev_device
*udev_device
)
1029 if (udev_device
== NULL
)
1031 udev_device
->refcount
--;
1032 if (udev_device
->refcount
> 0)
1034 if (udev_device
->parent_device
!= NULL
)
1035 udev_device_unref(udev_device
->parent_device
);
1036 free(udev_device
->syspath
);
1037 free(udev_device
->sysname
);
1038 free(udev_device
->devnode
);
1039 free(udev_device
->subsystem
);
1040 free(udev_device
->devtype
);
1041 udev_list_cleanup(&udev_device
->devlinks_list
);
1042 udev_list_cleanup(&udev_device
->properties_list
);
1043 udev_list_cleanup(&udev_device
->sysattr_value_list
);
1044 udev_list_cleanup(&udev_device
->sysattr_list
);
1045 udev_list_cleanup(&udev_device
->tags_list
);
1046 free(udev_device
->action
);
1047 free(udev_device
->driver
);
1048 free(udev_device
->devpath_old
);
1049 free(udev_device
->id_filename
);
1050 free(udev_device
->envp
);
1051 free(udev_device
->monitor_buf
);
1057 * udev_device_get_devpath:
1058 * @udev_device: udev device
1060 * Retrieve the kernel devpath value of the udev device. The path
1061 * does not contain the sys mount point, and starts with a '/'.
1063 * Returns: the devpath of the udev device
1065 _public_
const char *udev_device_get_devpath(struct udev_device
*udev_device
)
1067 if (udev_device
== NULL
)
1069 return udev_device
->devpath
;
1073 * udev_device_get_syspath:
1074 * @udev_device: udev device
1076 * Retrieve the sys path of the udev device. The path is an
1077 * absolute path and starts with the sys mount point.
1079 * Returns: the sys path of the udev device
1081 _public_
const char *udev_device_get_syspath(struct udev_device
*udev_device
)
1083 if (udev_device
== NULL
)
1085 return udev_device
->syspath
;
1089 * udev_device_get_sysname:
1090 * @udev_device: udev device
1092 * Get the kernel device name in /sys.
1094 * Returns: the name string of the device device
1096 _public_
const char *udev_device_get_sysname(struct udev_device
*udev_device
)
1098 if (udev_device
== NULL
)
1100 return udev_device
->sysname
;
1104 * udev_device_get_sysnum:
1105 * @udev_device: udev device
1107 * Get the instance number of the device.
1109 * Returns: the trailing number string of of the device name
1111 _public_
const char *udev_device_get_sysnum(struct udev_device
*udev_device
)
1113 if (udev_device
== NULL
)
1115 return udev_device
->sysnum
;
1119 * udev_device_get_devnode:
1120 * @udev_device: udev device
1122 * Retrieve the device node file name belonging to the udev device.
1123 * The path is an absolute path, and starts with the device directory.
1125 * Returns: the device node file name of the udev device, or #NULL if no device node exists
1127 _public_
const char *udev_device_get_devnode(struct udev_device
*udev_device
)
1129 if (udev_device
== NULL
)
1131 if (udev_device
->devnode
!= NULL
)
1132 return udev_device
->devnode
;
1133 if (!udev_device
->info_loaded
)
1134 udev_device_read_uevent_file(udev_device
);
1135 return udev_device
->devnode
;
1139 * udev_device_get_devlinks_list_entry:
1140 * @udev_device: udev device
1142 * Retrieve the list of device links pointing to the device file of
1143 * the udev device. The next list entry can be retrieved with
1144 * udev_list_entry_get_next(), which returns #NULL if no more entries exist.
1145 * The devlink path can be retrieved from the list entry by
1146 * udev_list_entry_get_name(). The path is an absolute path, and starts with
1147 * the device directory.
1149 * Returns: the first entry of the device node link list
1151 _public_
struct udev_list_entry
*udev_device_get_devlinks_list_entry(struct udev_device
*udev_device
)
1153 if (udev_device
== NULL
)
1155 if (!udev_device
->info_loaded
)
1156 udev_device_read_db(udev_device
, NULL
);
1157 return udev_list_get_entry(&udev_device
->devlinks_list
);
1160 void udev_device_cleanup_devlinks_list(struct udev_device
*udev_device
)
1162 udev_device
->devlinks_uptodate
= false;
1163 udev_list_cleanup(&udev_device
->devlinks_list
);
1167 * udev_device_get_properties_list_entry:
1168 * @udev_device: udev device
1170 * Retrieve the list of key/value device properties of the udev
1171 * device. The next list entry can be retrieved with udev_list_entry_get_next(),
1172 * which returns #NULL if no more entries exist. The property name
1173 * can be retrieved from the list entry by udev_list_entry_get_name(),
1174 * the property value by udev_list_entry_get_value().
1176 * Returns: the first entry of the property list
1178 _public_
struct udev_list_entry
*udev_device_get_properties_list_entry(struct udev_device
*udev_device
)
1180 if (udev_device
== NULL
)
1182 if (!udev_device
->info_loaded
) {
1183 udev_device_read_uevent_file(udev_device
);
1184 udev_device_read_db(udev_device
, NULL
);
1186 if (!udev_device
->devlinks_uptodate
) {
1187 char symlinks
[UTIL_PATH_SIZE
];
1188 struct udev_list_entry
*list_entry
;
1190 udev_device
->devlinks_uptodate
= true;
1191 list_entry
= udev_device_get_devlinks_list_entry(udev_device
);
1192 if (list_entry
!= NULL
) {
1197 l
= util_strpcpyl(&s
, sizeof(symlinks
), udev_list_entry_get_name(list_entry
), NULL
);
1198 udev_list_entry_foreach(list_entry
, udev_list_entry_get_next(list_entry
))
1199 l
= util_strpcpyl(&s
, l
, " ", udev_list_entry_get_name(list_entry
), NULL
);
1200 udev_device_add_property(udev_device
, "DEVLINKS", symlinks
);
1203 if (!udev_device
->tags_uptodate
) {
1204 udev_device
->tags_uptodate
= true;
1205 if (udev_device_get_tags_list_entry(udev_device
) != NULL
) {
1206 char tags
[UTIL_PATH_SIZE
];
1207 struct udev_list_entry
*list_entry
;
1212 l
= util_strpcpyl(&s
, sizeof(tags
), ":", NULL
);
1213 udev_list_entry_foreach(list_entry
, udev_device_get_tags_list_entry(udev_device
))
1214 l
= util_strpcpyl(&s
, l
, udev_list_entry_get_name(list_entry
), ":", NULL
);
1215 udev_device_add_property(udev_device
, "TAGS", tags
);
1218 return udev_list_get_entry(&udev_device
->properties_list
);
1222 * udev_device_get_action:
1223 * @udev_device: udev device
1225 * This is only valid if the device was received through a monitor. Devices read from
1226 * sys do not have an action string. Usual actions are: add, remove, change, online,
1229 * Returns: the kernel action value, or #NULL if there is no action value available.
1231 _public_
const char *udev_device_get_action(struct udev_device
*udev_device
)
1233 if (udev_device
== NULL
)
1235 return udev_device
->action
;
1239 * udev_device_get_usec_since_initialized:
1240 * @udev_device: udev device
1242 * Return the number of microseconds passed since udev set up the
1243 * device for the first time.
1245 * This is only implemented for devices with need to store properties
1246 * in the udev database. All other devices return 0 here.
1248 * Returns: the number of microseconds since the device was first seen.
1250 _public_
unsigned long long int udev_device_get_usec_since_initialized(struct udev_device
*udev_device
)
1252 unsigned long long now_ts
;
1254 if (udev_device
== NULL
)
1256 if (!udev_device
->info_loaded
)
1257 udev_device_read_db(udev_device
, NULL
);
1258 if (udev_device
->usec_initialized
== 0)
1260 now_ts
= now_usec();
1263 return now_ts
- udev_device
->usec_initialized
;
1266 unsigned long long udev_device_get_usec_initialized(struct udev_device
*udev_device
)
1268 return udev_device
->usec_initialized
;
1271 void udev_device_set_usec_initialized(struct udev_device
*udev_device
, unsigned long long usec_initialized
)
1275 udev_device
->usec_initialized
= usec_initialized
;
1276 snprintf(num
, sizeof(num
), "%llu", usec_initialized
);
1277 udev_device_add_property(udev_device
, "USEC_INITIALIZED", num
);
1281 * udev_device_get_sysattr_value:
1282 * @udev_device: udev device
1283 * @sysattr: attribute name
1285 * The retrieved value is cached in the device. Repeated calls will return the same
1286 * value and not open the attribute again.
1288 * Returns: the content of a sys attribute file, or #NULL if there is no sys attribute value.
1290 _public_
const char *udev_device_get_sysattr_value(struct udev_device
*udev_device
, const char *sysattr
)
1292 struct udev_list_entry
*list_entry
;
1293 char path
[UTIL_PATH_SIZE
];
1295 struct stat statbuf
;
1298 const char *val
= NULL
;
1300 if (udev_device
== NULL
)
1302 if (sysattr
== NULL
)
1305 /* look for possibly already cached result */
1306 list_entry
= udev_list_get_entry(&udev_device
->sysattr_value_list
);
1307 list_entry
= udev_list_entry_get_by_name(list_entry
, sysattr
);
1308 if (list_entry
!= NULL
)
1309 return udev_list_entry_get_value(list_entry
);
1311 util_strscpyl(path
, sizeof(path
), udev_device_get_syspath(udev_device
), "/", sysattr
, NULL
);
1312 if (lstat(path
, &statbuf
) != 0) {
1313 udev_list_entry_add(&udev_device
->sysattr_value_list
, sysattr
, NULL
);
1317 if (S_ISLNK(statbuf
.st_mode
)) {
1318 struct udev_device
*dev
;
1321 * Some core links return only the last element of the target path,
1322 * these are just values, the paths should not be exposed.
1324 if (streq(sysattr
, "driver") ||
1325 streq(sysattr
, "subsystem") ||
1326 streq(sysattr
, "module")) {
1327 if (util_get_sys_core_link_value(udev_device
->udev
, sysattr
,
1328 udev_device
->syspath
, value
, sizeof(value
)) < 0)
1330 list_entry
= udev_list_entry_add(&udev_device
->sysattr_value_list
, sysattr
, value
);
1331 val
= udev_list_entry_get_value(list_entry
);
1335 /* resolve link to a device and return its syspath */
1336 util_strscpyl(path
, sizeof(path
), udev_device
->syspath
, "/", sysattr
, NULL
);
1337 dev
= udev_device_new_from_syspath(udev_device
->udev
, path
);
1339 list_entry
= udev_list_entry_add(&udev_device
->sysattr_value_list
, sysattr
,
1340 udev_device_get_syspath(dev
));
1341 val
= udev_list_entry_get_value(list_entry
);
1342 udev_device_unref(dev
);
1348 /* skip directories */
1349 if (S_ISDIR(statbuf
.st_mode
))
1352 /* skip non-readable files */
1353 if ((statbuf
.st_mode
& S_IRUSR
) == 0)
1356 /* read attribute value */
1357 fd
= open(path
, O_RDONLY
|O_CLOEXEC
);
1360 size
= read(fd
, value
, sizeof(value
));
1364 if (size
== sizeof(value
))
1367 /* got a valid value, store it in cache and return it */
1369 util_remove_trailing_chars(value
, '\n');
1370 list_entry
= udev_list_entry_add(&udev_device
->sysattr_value_list
, sysattr
, value
);
1371 val
= udev_list_entry_get_value(list_entry
);
1376 static int udev_device_sysattr_list_read(struct udev_device
*udev_device
)
1378 struct dirent
*dent
;
1382 if (udev_device
== NULL
)
1384 if (udev_device
->sysattr_list_read
)
1387 dir
= opendir(udev_device_get_syspath(udev_device
));
1391 for (dent
= readdir(dir
); dent
!= NULL
; dent
= readdir(dir
)) {
1392 char path
[UTIL_PATH_SIZE
];
1393 struct stat statbuf
;
1395 /* only handle symlinks and regular files */
1396 if (dent
->d_type
!= DT_LNK
&& dent
->d_type
!= DT_REG
)
1399 util_strscpyl(path
, sizeof(path
), udev_device_get_syspath(udev_device
), "/", dent
->d_name
, NULL
);
1400 if (lstat(path
, &statbuf
) != 0)
1402 if ((statbuf
.st_mode
& S_IRUSR
) == 0)
1405 udev_list_entry_add(&udev_device
->sysattr_list
, dent
->d_name
, NULL
);
1410 udev_device
->sysattr_list_read
= true;
1416 * udev_device_get_sysattr_list_entry:
1417 * @udev_device: udev device
1419 * Retrieve the list of available sysattrs, with value being empty;
1420 * This just return all available sysfs attributes for a particular
1421 * device without reading their values.
1423 * Returns: the first entry of the property list
1425 _public_
struct udev_list_entry
*udev_device_get_sysattr_list_entry(struct udev_device
*udev_device
)
1427 if (!udev_device
->sysattr_list_read
) {
1429 ret
= udev_device_sysattr_list_read(udev_device
);
1434 return udev_list_get_entry(&udev_device
->sysattr_list
);
1437 int udev_device_set_syspath(struct udev_device
*udev_device
, const char *syspath
)
1442 free(udev_device
->syspath
);
1443 udev_device
->syspath
= strdup(syspath
);
1444 if (udev_device
->syspath
== NULL
)
1446 udev_device
->devpath
= udev_device
->syspath
+ strlen("/sys");
1447 udev_device_add_property(udev_device
, "DEVPATH", udev_device
->devpath
);
1449 pos
= strrchr(udev_device
->syspath
, '/');
1452 udev_device
->sysname
= strdup(&pos
[1]);
1453 if (udev_device
->sysname
== NULL
)
1456 /* some devices have '!' in their name, change that to '/' */
1458 while (udev_device
->sysname
[len
] != '\0') {
1459 if (udev_device
->sysname
[len
] == '!')
1460 udev_device
->sysname
[len
] = '/';
1464 /* trailing number */
1465 while (len
> 0 && isdigit(udev_device
->sysname
[--len
]))
1466 udev_device
->sysnum
= &udev_device
->sysname
[len
];
1468 /* sysname is completely numeric */
1470 udev_device
->sysnum
= NULL
;
1475 int udev_device_set_devnode(struct udev_device
*udev_device
, const char *devnode
)
1477 free(udev_device
->devnode
);
1478 if (devnode
[0] != '/') {
1479 if (asprintf(&udev_device
->devnode
, "/dev/%s", devnode
) < 0)
1480 udev_device
->devnode
= NULL
;
1482 udev_device
->devnode
= strdup(devnode
);
1484 if (udev_device
->devnode
== NULL
)
1486 udev_device_add_property(udev_device
, "DEVNAME", udev_device
->devnode
);
1490 int udev_device_add_devlink(struct udev_device
*udev_device
, const char *devlink
, int unique
)
1492 struct udev_list_entry
*list_entry
;
1494 udev_device
->devlinks_uptodate
= false;
1495 list_entry
= udev_list_entry_add(&udev_device
->devlinks_list
, devlink
, NULL
);
1496 if (list_entry
== NULL
)
1499 udev_list_entry_set_num(list_entry
, true);
1503 const char *udev_device_get_id_filename(struct udev_device
*udev_device
)
1505 if (udev_device
->id_filename
== NULL
) {
1506 if (udev_device_get_subsystem(udev_device
) == NULL
)
1509 if (major(udev_device_get_devnum(udev_device
)) > 0) {
1510 /* use dev_t -- b259:131072, c254:0 */
1511 if (asprintf(&udev_device
->id_filename
, "%c%u:%u",
1512 streq(udev_device_get_subsystem(udev_device
), "block") ? 'b' : 'c',
1513 major(udev_device_get_devnum(udev_device
)),
1514 minor(udev_device_get_devnum(udev_device
))) < 0)
1515 udev_device
->id_filename
= NULL
;
1516 } else if (udev_device_get_ifindex(udev_device
) > 0) {
1517 /* use netdev ifindex -- n3 */
1518 if (asprintf(&udev_device
->id_filename
, "n%u", udev_device_get_ifindex(udev_device
)) < 0)
1519 udev_device
->id_filename
= NULL
;
1522 * use $subsys:$syname -- pci:0000:00:1f.2
1523 * sysname() has '!' translated, get it from devpath
1525 const char *sysname
;
1526 sysname
= strrchr(udev_device
->devpath
, '/');
1527 if (sysname
== NULL
)
1529 sysname
= &sysname
[1];
1530 if (asprintf(&udev_device
->id_filename
, "+%s:%s", udev_device_get_subsystem(udev_device
), sysname
) < 0)
1531 udev_device
->id_filename
= NULL
;
1534 return udev_device
->id_filename
;
1538 * udev_device_get_is_initialized:
1539 * @udev_device: udev device
1541 * Check if udev has already handled the device and has set up
1542 * device node permissions and context, or has renamed a network
1545 * This is only implemented for devices with a device node
1546 * or network interfaces. All other devices return 1 here.
1548 * Returns: 1 if the device is set up. 0 otherwise.
1550 _public_
int udev_device_get_is_initialized(struct udev_device
*udev_device
)
1552 if (!udev_device
->info_loaded
)
1553 udev_device_read_db(udev_device
, NULL
);
1554 return udev_device
->is_initialized
;
1557 void udev_device_set_is_initialized(struct udev_device
*udev_device
)
1559 udev_device
->is_initialized
= true;
1562 int udev_device_add_tag(struct udev_device
*udev_device
, const char *tag
)
1564 if (strchr(tag
, ':') != NULL
|| strchr(tag
, ' ') != NULL
)
1566 udev_device
->tags_uptodate
= false;
1567 if (udev_list_entry_add(&udev_device
->tags_list
, tag
, NULL
) != NULL
)
1572 void udev_device_cleanup_tags_list(struct udev_device
*udev_device
)
1574 udev_device
->tags_uptodate
= false;
1575 udev_list_cleanup(&udev_device
->tags_list
);
1579 * udev_device_get_tags_list_entry:
1580 * @udev_device: udev device
1582 * Retrieve the list of tags attached to the udev device. The next
1583 * list entry can be retrieved with udev_list_entry_get_next(),
1584 * which returns #NULL if no more entries exist. The tag string
1585 * can be retrieved from the list entry by udev_list_entry_get_name().
1587 * Returns: the first entry of the tag list
1589 _public_
struct udev_list_entry
*udev_device_get_tags_list_entry(struct udev_device
*udev_device
)
1591 if (udev_device
== NULL
)
1593 if (!udev_device
->info_loaded
)
1594 udev_device_read_db(udev_device
, NULL
);
1595 return udev_list_get_entry(&udev_device
->tags_list
);
1599 * udev_device_has_tag:
1600 * @udev_device: udev device
1603 * Check if a given device has a certain tag associated.
1605 * Returns: 1 if the tag is found. 0 otherwise.
1607 _public_
int udev_device_has_tag(struct udev_device
*udev_device
, const char *tag
)
1609 struct udev_list_entry
*list_entry
;
1611 if (udev_device
== NULL
)
1613 if (!udev_device
->info_loaded
)
1614 udev_device_read_db(udev_device
, NULL
);
1615 list_entry
= udev_device_get_tags_list_entry(udev_device
);
1616 if (udev_list_entry_get_by_name(list_entry
, tag
) != NULL
)
1621 #define ENVP_SIZE 128
1622 #define MONITOR_BUF_SIZE 4096
1623 static int update_envp_monitor_buf(struct udev_device
*udev_device
)
1625 struct udev_list_entry
*list_entry
;
1630 /* monitor buffer of property strings */
1631 free(udev_device
->monitor_buf
);
1632 udev_device
->monitor_buf_len
= 0;
1633 udev_device
->monitor_buf
= malloc(MONITOR_BUF_SIZE
);
1634 if (udev_device
->monitor_buf
== NULL
)
1637 /* envp array, strings will point into monitor buffer */
1638 if (udev_device
->envp
== NULL
)
1639 udev_device
->envp
= malloc(sizeof(char *) * ENVP_SIZE
);
1640 if (udev_device
->envp
== NULL
)
1644 s
= udev_device
->monitor_buf
;
1645 l
= MONITOR_BUF_SIZE
;
1646 udev_list_entry_foreach(list_entry
, udev_device_get_properties_list_entry(udev_device
)) {
1649 key
= udev_list_entry_get_name(list_entry
);
1650 /* skip private variables */
1654 /* add string to envp array */
1655 udev_device
->envp
[i
++] = s
;
1656 if (i
+1 >= ENVP_SIZE
)
1659 /* add property string to monitor buffer */
1660 l
= util_strpcpyl(&s
, l
, key
, "=", udev_list_entry_get_value(list_entry
), NULL
);
1663 /* advance past the trailing '\0' that util_strpcpyl() guarantees */
1667 udev_device
->envp
[i
] = NULL
;
1668 udev_device
->monitor_buf_len
= s
- udev_device
->monitor_buf
;
1669 udev_device
->envp_uptodate
= true;
1673 char **udev_device_get_properties_envp(struct udev_device
*udev_device
)
1675 if (!udev_device
->envp_uptodate
)
1676 if (update_envp_monitor_buf(udev_device
) != 0)
1678 return udev_device
->envp
;
1681 ssize_t
udev_device_get_properties_monitor_buf(struct udev_device
*udev_device
, const char **buf
)
1683 if (!udev_device
->envp_uptodate
)
1684 if (update_envp_monitor_buf(udev_device
) != 0)
1686 *buf
= udev_device
->monitor_buf
;
1687 return udev_device
->monitor_buf_len
;
1690 int udev_device_set_action(struct udev_device
*udev_device
, const char *action
)
1692 free(udev_device
->action
);
1693 udev_device
->action
= strdup(action
);
1694 if (udev_device
->action
== NULL
)
1696 udev_device_add_property(udev_device
, "ACTION", udev_device
->action
);
1700 int udev_device_get_devlink_priority(struct udev_device
*udev_device
)
1702 if (!udev_device
->info_loaded
)
1703 udev_device_read_db(udev_device
, NULL
);
1704 return udev_device
->devlink_priority
;
1707 int udev_device_set_devlink_priority(struct udev_device
*udev_device
, int prio
)
1709 udev_device
->devlink_priority
= prio
;
1713 int udev_device_get_watch_handle(struct udev_device
*udev_device
)
1715 if (!udev_device
->info_loaded
)
1716 udev_device_read_db(udev_device
, NULL
);
1717 return udev_device
->watch_handle
;
1720 int udev_device_set_watch_handle(struct udev_device
*udev_device
, int handle
)
1722 udev_device
->watch_handle
= handle
;
1726 bool udev_device_get_db_persist(struct udev_device
*udev_device
)
1728 return udev_device
->db_persist
;
1731 void udev_device_set_db_persist(struct udev_device
*udev_device
)
1733 udev_device
->db_persist
= true;