2 This file is part of systemd.
4 Copyright 2008-2012 Kay Sievers <kay@vrfy.org>
6 systemd is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version.
11 systemd is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public License
17 along with systemd; If not, see <http://www.gnu.org/licenses/>.
32 #include <sys/ioctl.h>
33 #include <sys/socket.h>
34 #include <linux/sockios.h>
37 #include "libudev-private.h"
40 * SECTION:libudev-device
41 * @short_description: kernel sys devices
43 * Representation of kernel sys devices. Devices are uniquely identified
44 * by their syspath, every device has exactly one path in the kernel sys
45 * filesystem. Devices usually belong to a kernel subsystem, and and have
46 * a unique name inside that subsystem.
52 * Opaque object representing one kernel sys device.
56 struct udev_device
*parent_device
;
71 size_t monitor_buf_len
;
72 struct udev_list devlinks_list
;
73 struct udev_list properties_list
;
74 struct udev_list sysattr_value_list
;
75 struct udev_list sysattr_list
;
76 struct udev_list tags_list
;
77 unsigned long long int seqnum
;
78 usec_t usec_initialized
;
88 bool devlinks_uptodate
;
96 bool sysattr_list_read
;
101 * udev_device_get_seqnum:
102 * @udev_device: udev device
104 * This is only valid if the device was received through a monitor. Devices read from
105 * sys do not have a sequence number.
107 * Returns: the kernel event sequence number, or 0 if there is no sequence number available.
109 _public_
unsigned long long int udev_device_get_seqnum(struct udev_device
*udev_device
)
111 if (udev_device
== NULL
)
113 return udev_device
->seqnum
;
116 static int udev_device_set_seqnum(struct udev_device
*udev_device
, unsigned long long int seqnum
)
120 udev_device
->seqnum
= seqnum
;
121 snprintf(num
, sizeof(num
), "%llu", seqnum
);
122 udev_device_add_property(udev_device
, "SEQNUM", num
);
126 int udev_device_get_ifindex(struct udev_device
*udev_device
)
128 if (!udev_device
->info_loaded
)
129 udev_device_read_uevent_file(udev_device
);
130 return udev_device
->ifindex
;
133 static int udev_device_set_ifindex(struct udev_device
*udev_device
, int ifindex
)
137 udev_device
->ifindex
= ifindex
;
138 snprintf(num
, sizeof(num
), "%u", ifindex
);
139 udev_device_add_property(udev_device
, "IFINDEX", num
);
144 * udev_device_get_devnum:
145 * @udev_device: udev device
147 * Get the device major/minor number.
149 * Returns: the dev_t number.
151 _public_ dev_t
udev_device_get_devnum(struct udev_device
*udev_device
)
153 if (udev_device
== NULL
)
154 return makedev(0, 0);
155 if (!udev_device
->info_loaded
)
156 udev_device_read_uevent_file(udev_device
);
157 return udev_device
->devnum
;
160 static int udev_device_set_devnum(struct udev_device
*udev_device
, dev_t devnum
)
164 udev_device
->devnum
= devnum
;
166 snprintf(num
, sizeof(num
), "%u", major(devnum
));
167 udev_device_add_property(udev_device
, "MAJOR", num
);
168 snprintf(num
, sizeof(num
), "%u", minor(devnum
));
169 udev_device_add_property(udev_device
, "MINOR", num
);
173 const char *udev_device_get_devpath_old(struct udev_device
*udev_device
)
175 return udev_device
->devpath_old
;
178 static int udev_device_set_devpath_old(struct udev_device
*udev_device
, const char *devpath_old
)
182 free(udev_device
->devpath_old
);
183 udev_device
->devpath_old
= strdup(devpath_old
);
184 if (udev_device
->devpath_old
== NULL
)
186 udev_device_add_property(udev_device
, "DEVPATH_OLD", udev_device
->devpath_old
);
188 pos
= strrchr(udev_device
->devpath_old
, '/');
195 * udev_device_get_driver:
196 * @udev_device: udev device
198 * Get the kernel driver name.
200 * Returns: the driver name string, or #NULL if there is no driver attached.
202 _public_
const char *udev_device_get_driver(struct udev_device
*udev_device
)
204 char driver
[UTIL_NAME_SIZE
];
206 if (udev_device
== NULL
)
208 if (!udev_device
->driver_set
) {
209 udev_device
->driver_set
= true;
210 if (util_get_sys_core_link_value(udev_device
->udev
, "driver", udev_device
->syspath
, driver
, sizeof(driver
)) > 0)
211 udev_device
->driver
= strdup(driver
);
213 return udev_device
->driver
;
216 static int udev_device_set_driver(struct udev_device
*udev_device
, const char *driver
)
218 free(udev_device
->driver
);
219 udev_device
->driver
= strdup(driver
);
220 if (udev_device
->driver
== NULL
)
222 udev_device
->driver_set
= true;
223 udev_device_add_property(udev_device
, "DRIVER", udev_device
->driver
);
228 * udev_device_get_devtype:
229 * @udev_device: udev device
231 * Retrieve the devtype string of the udev device.
233 * Returns: the devtype name of the udev device, or #NULL if it can not be determined
235 _public_
const char *udev_device_get_devtype(struct udev_device
*udev_device
)
237 if (udev_device
== NULL
)
239 if (!udev_device
->devtype_set
) {
240 udev_device
->devtype_set
= true;
241 udev_device_read_uevent_file(udev_device
);
243 return udev_device
->devtype
;
246 static int udev_device_set_devtype(struct udev_device
*udev_device
, const char *devtype
)
248 free(udev_device
->devtype
);
249 udev_device
->devtype
= strdup(devtype
);
250 if (udev_device
->devtype
== NULL
)
252 udev_device
->devtype_set
= true;
253 udev_device_add_property(udev_device
, "DEVTYPE", udev_device
->devtype
);
257 int udev_device_set_subsystem(struct udev_device
*udev_device
, const char *subsystem
)
259 free(udev_device
->subsystem
);
260 udev_device
->subsystem
= strdup(subsystem
);
261 if (udev_device
->subsystem
== NULL
)
263 udev_device
->subsystem_set
= true;
264 udev_device_add_property(udev_device
, "SUBSYSTEM", udev_device
->subsystem
);
269 * udev_device_get_subsystem:
270 * @udev_device: udev device
272 * Retrieve the subsystem string of the udev device. The string does not
275 * Returns: the subsystem name of the udev device, or #NULL if it can not be determined
277 _public_
const char *udev_device_get_subsystem(struct udev_device
*udev_device
)
279 char subsystem
[UTIL_NAME_SIZE
];
281 if (udev_device
== NULL
)
283 if (!udev_device
->subsystem_set
) {
284 udev_device
->subsystem_set
= true;
285 /* read "subsystem" link */
286 if (util_get_sys_core_link_value(udev_device
->udev
, "subsystem", udev_device
->syspath
, subsystem
, sizeof(subsystem
)) > 0) {
287 udev_device_set_subsystem(udev_device
, subsystem
);
288 return udev_device
->subsystem
;
291 if (startswith(udev_device
->devpath
, "/module/")) {
292 udev_device_set_subsystem(udev_device
, "module");
293 return udev_device
->subsystem
;
295 if (strstr(udev_device
->devpath
, "/drivers/") != NULL
) {
296 udev_device_set_subsystem(udev_device
, "drivers");
297 return udev_device
->subsystem
;
299 if (startswith(udev_device
->devpath
, "/subsystem/") ||
300 startswith(udev_device
->devpath
, "/class/") ||
301 startswith(udev_device
->devpath
, "/bus/")) {
302 udev_device_set_subsystem(udev_device
, "subsystem");
303 return udev_device
->subsystem
;
306 return udev_device
->subsystem
;
309 mode_t
udev_device_get_devnode_mode(struct udev_device
*udev_device
)
311 if (!udev_device
->info_loaded
)
312 udev_device_read_uevent_file(udev_device
);
313 return udev_device
->devnode_mode
;
316 static int udev_device_set_devnode_mode(struct udev_device
*udev_device
, mode_t mode
)
320 udev_device
->devnode_mode
= mode
;
321 snprintf(num
, sizeof(num
), "%#o", mode
);
322 udev_device_add_property(udev_device
, "DEVMODE", num
);
326 struct udev_list_entry
*udev_device_add_property(struct udev_device
*udev_device
, const char *key
, const char *value
)
328 udev_device
->envp_uptodate
= false;
330 struct udev_list_entry
*list_entry
;
332 list_entry
= udev_device_get_properties_list_entry(udev_device
);
333 list_entry
= udev_list_entry_get_by_name(list_entry
, key
);
334 if (list_entry
!= NULL
)
335 udev_list_entry_delete(list_entry
);
338 return udev_list_entry_add(&udev_device
->properties_list
, key
, value
);
341 static struct udev_list_entry
*udev_device_add_property_from_string(struct udev_device
*udev_device
, const char *property
)
343 char name
[UTIL_LINE_SIZE
];
346 util_strscpy(name
, sizeof(name
), property
);
347 val
= strchr(name
, '=');
354 return udev_device_add_property(udev_device
, name
, val
);
358 * parse property string, and if needed, update internal values accordingly
360 * udev_device_add_property_from_string_parse_finish() needs to be
361 * called after adding properties, and its return value checked
363 * udev_device_set_info_loaded() needs to be set, to avoid trying
364 * to use a device without a DEVPATH set
366 void udev_device_add_property_from_string_parse(struct udev_device
*udev_device
, const char *property
)
368 if (startswith(property
, "DEVPATH=")) {
369 char path
[UTIL_PATH_SIZE
];
371 util_strscpyl(path
, sizeof(path
), "/sys", &property
[8], NULL
);
372 udev_device_set_syspath(udev_device
, path
);
373 } else if (startswith(property
, "SUBSYSTEM=")) {
374 udev_device_set_subsystem(udev_device
, &property
[10]);
375 } else if (startswith(property
, "DEVTYPE=")) {
376 udev_device_set_devtype(udev_device
, &property
[8]);
377 } else if (startswith(property
, "DEVNAME=")) {
378 udev_device_set_devnode(udev_device
, &property
[8]);
379 } else if (startswith(property
, "DEVLINKS=")) {
380 char devlinks
[UTIL_PATH_SIZE
];
384 util_strscpy(devlinks
, sizeof(devlinks
), &property
[9]);
386 next
= strchr(slink
, ' ');
387 while (next
!= NULL
) {
389 udev_device_add_devlink(udev_device
, slink
);
391 next
= strchr(slink
, ' ');
393 if (slink
[0] != '\0')
394 udev_device_add_devlink(udev_device
, slink
);
395 } else if (startswith(property
, "TAGS=")) {
396 char tags
[UTIL_PATH_SIZE
];
399 util_strscpy(tags
, sizeof(tags
), &property
[5]);
400 next
= strchr(tags
, ':');
403 while (next
[0] != '\0') {
407 next
= strchr(tag
, ':');
412 udev_device_add_tag(udev_device
, tag
);
415 } else if (startswith(property
, "USEC_INITIALIZED=")) {
416 udev_device_set_usec_initialized(udev_device
, strtoull(&property
[19], NULL
, 10));
417 } else if (startswith(property
, "DRIVER=")) {
418 udev_device_set_driver(udev_device
, &property
[7]);
419 } else if (startswith(property
, "ACTION=")) {
420 udev_device_set_action(udev_device
, &property
[7]);
421 } else if (startswith(property
, "MAJOR=")) {
422 udev_device
->maj
= strtoull(&property
[6], NULL
, 10);
423 } else if (startswith(property
, "MINOR=")) {
424 udev_device
->min
= strtoull(&property
[6], NULL
, 10);
425 } else if (startswith(property
, "DEVPATH_OLD=")) {
426 udev_device_set_devpath_old(udev_device
, &property
[12]);
427 } else if (startswith(property
, "SEQNUM=")) {
428 udev_device_set_seqnum(udev_device
, strtoull(&property
[7], NULL
, 10));
429 } else if (startswith(property
, "IFINDEX=")) {
430 udev_device_set_ifindex(udev_device
, strtoull(&property
[8], NULL
, 10));
431 } else if (startswith(property
, "DEVMODE=")) {
432 udev_device_set_devnode_mode(udev_device
, strtoul(&property
[8], NULL
, 8));
434 udev_device_add_property_from_string(udev_device
, property
);
438 int udev_device_add_property_from_string_parse_finish(struct udev_device
*udev_device
)
440 if (udev_device
->maj
> 0)
441 udev_device_set_devnum(udev_device
, makedev(udev_device
->maj
, udev_device
->min
));
442 udev_device
->maj
= 0;
443 udev_device
->min
= 0;
445 if (udev_device
->devpath
== NULL
|| udev_device
->subsystem
== NULL
)
451 * udev_device_get_property_value:
452 * @udev_device: udev device
453 * @key: property name
455 * Get the value of a given property.
457 * Returns: the property string, or #NULL if there is no such property.
459 _public_
const char *udev_device_get_property_value(struct udev_device
*udev_device
, const char *key
)
461 struct udev_list_entry
*list_entry
;
463 if (udev_device
== NULL
)
468 list_entry
= udev_device_get_properties_list_entry(udev_device
);
469 list_entry
= udev_list_entry_get_by_name(list_entry
, key
);
470 return udev_list_entry_get_value(list_entry
);
473 int udev_device_read_db(struct udev_device
*udev_device
, const char *dbfile
)
475 char filename
[UTIL_PATH_SIZE
];
476 char line
[UTIL_LINE_SIZE
];
479 /* providing a database file will always force-load it */
480 if (dbfile
== NULL
) {
483 if (udev_device
->db_loaded
)
485 udev_device
->db_loaded
= true;
487 id
= udev_device_get_id_filename(udev_device
);
490 util_strscpyl(filename
, sizeof(filename
), "/run/udev/data/", id
, NULL
);
494 f
= fopen(dbfile
, "re");
496 udev_dbg(udev_device
->udev
, "no db file to read %s: %m\n", dbfile
);
499 udev_device
->is_initialized
= true;
501 while (fgets(line
, sizeof(line
), f
)) {
504 struct udev_list_entry
*entry
;
513 util_strscpyl(filename
, sizeof(filename
), "/dev/", val
, NULL
);
514 udev_device_add_devlink(udev_device
, filename
);
517 udev_device_set_devlink_priority(udev_device
, atoi(val
));
520 entry
= udev_device_add_property_from_string(udev_device
, val
);
521 udev_list_entry_set_num(entry
, true);
524 udev_device_add_tag(udev_device
, val
);
527 udev_device_set_watch_handle(udev_device
, atoi(val
));
530 udev_device_set_usec_initialized(udev_device
, strtoull(val
, NULL
, 10));
536 udev_dbg(udev_device
->udev
, "device %p filled with db file data\n", udev_device
);
540 int udev_device_read_uevent_file(struct udev_device
*udev_device
)
542 char filename
[UTIL_PATH_SIZE
];
544 char line
[UTIL_LINE_SIZE
];
548 if (udev_device
->uevent_loaded
)
551 util_strscpyl(filename
, sizeof(filename
), udev_device
->syspath
, "/uevent", NULL
);
552 f
= fopen(filename
, "re");
555 udev_device
->uevent_loaded
= true;
557 while (fgets(line
, sizeof(line
), f
)) {
560 pos
= strchr(line
, '\n');
565 if (startswith(line
, "DEVTYPE=")) {
566 udev_device_set_devtype(udev_device
, &line
[8]);
569 if (startswith(line
, "IFINDEX=")) {
570 udev_device_set_ifindex(udev_device
, strtoull(&line
[8], NULL
, 10));
573 if (startswith(line
, "DEVNAME=")) {
574 udev_device_set_devnode(udev_device
, &line
[8]);
578 if (startswith(line
, "MAJOR="))
579 maj
= strtoull(&line
[6], NULL
, 10);
580 else if (startswith(line
, "MINOR="))
581 min
= strtoull(&line
[6], NULL
, 10);
582 else if (startswith(line
, "DEVMODE="))
583 udev_device
->devnode_mode
= strtoul(&line
[8], NULL
, 8);
585 udev_device_add_property_from_string(udev_device
, line
);
588 udev_device
->devnum
= makedev(maj
, min
);
593 void udev_device_set_info_loaded(struct udev_device
*device
)
595 device
->info_loaded
= true;
598 struct udev_device
*udev_device_new(struct udev
*udev
)
600 struct udev_device
*udev_device
;
601 struct udev_list_entry
*list_entry
;
606 udev_device
= calloc(1, sizeof(struct udev_device
));
607 if (udev_device
== NULL
)
609 udev_device
->refcount
= 1;
610 udev_device
->udev
= udev
;
611 udev_list_init(udev
, &udev_device
->devlinks_list
, true);
612 udev_list_init(udev
, &udev_device
->properties_list
, true);
613 udev_list_init(udev
, &udev_device
->sysattr_value_list
, true);
614 udev_list_init(udev
, &udev_device
->sysattr_list
, false);
615 udev_list_init(udev
, &udev_device
->tags_list
, true);
616 udev_device
->watch_handle
= -1;
617 /* copy global properties */
618 udev_list_entry_foreach(list_entry
, udev_get_properties_list_entry(udev
))
619 udev_device_add_property(udev_device
,
620 udev_list_entry_get_name(list_entry
),
621 udev_list_entry_get_value(list_entry
));
626 * udev_device_new_from_syspath:
627 * @udev: udev library context
628 * @syspath: sys device path including sys directory
630 * Create new udev device, and fill in information from the sys
631 * device and the udev database entry. The syspath is the absolute
632 * path to the device, including the sys mount point.
634 * The initial refcount is 1, and needs to be decremented to
635 * release the resources of the udev device.
637 * Returns: a new udev device, or #NULL, if it does not exist
639 _public_
struct udev_device
*udev_device_new_from_syspath(struct udev
*udev
, const char *syspath
)
642 char path
[UTIL_PATH_SIZE
];
645 struct udev_device
*udev_device
;
652 /* path starts in sys */
653 if (!startswith(syspath
, "/sys")) {
654 udev_dbg(udev
, "not in sys :%s\n", syspath
);
658 /* path is not a root directory */
659 subdir
= syspath
+ strlen("/sys");
660 pos
= strrchr(subdir
, '/');
661 if (pos
== NULL
|| pos
[1] == '\0' || pos
< &subdir
[2])
664 /* resolve possible symlink to real path */
665 util_strscpy(path
, sizeof(path
), syspath
);
666 util_resolve_sys_link(udev
, path
, sizeof(path
));
668 if (startswith(path
+ strlen("/sys"), "/devices/")) {
669 char file
[UTIL_PATH_SIZE
];
671 /* all "devices" require a "uevent" file */
672 util_strscpyl(file
, sizeof(file
), path
, "/uevent", NULL
);
673 if (stat(file
, &statbuf
) != 0)
676 /* everything else just needs to be a directory */
677 if (stat(path
, &statbuf
) != 0 || !S_ISDIR(statbuf
.st_mode
))
681 udev_device
= udev_device_new(udev
);
682 if (udev_device
== NULL
)
685 udev_device_set_syspath(udev_device
, path
);
686 udev_dbg(udev
, "device %p has devpath '%s'\n", udev_device
, udev_device_get_devpath(udev_device
));
692 * udev_device_new_from_devnum:
693 * @udev: udev library context
694 * @type: char or block device
695 * @devnum: device major/minor number
697 * Create new udev device, and fill in information from the sys
698 * device and the udev database entry. The device is looked-up
699 * by its major/minor number and type. Character and block device
700 * numbers are not unique across the two types.
702 * The initial refcount is 1, and needs to be decremented to
703 * release the resources of the udev device.
705 * Returns: a new udev device, or #NULL, if it does not exist
707 _public_
struct udev_device
*udev_device_new_from_devnum(struct udev
*udev
, char type
, dev_t devnum
)
709 char path
[UTIL_PATH_SIZE
];
710 const char *type_str
;
714 else if (type
== 'c')
719 /* use /sys/dev/{block,char}/<maj>:<min> link */
720 snprintf(path
, sizeof(path
), "/sys/dev/%s/%u:%u",
721 type_str
, major(devnum
), minor(devnum
));
722 return udev_device_new_from_syspath(udev
, path
);
726 * udev_device_new_from_device_id:
727 * @udev: udev library context
728 * @id: text string identifying a kernel device
730 * Create new udev device, and fill in information from the sys
731 * device and the udev database entry. The device is looked-up
732 * by a special string:
733 * b8:2 - block device major:minor
734 * c128:1 - char device major:minor
735 * n3 - network device ifindex
736 * +sound:card29 - kernel driver core subsystem:device name
738 * The initial refcount is 1, and needs to be decremented to
739 * release the resources of the udev device.
741 * Returns: a new udev device, or #NULL, if it does not exist
743 _public_
struct udev_device
*udev_device_new_from_device_id(struct udev
*udev
, char *id
)
747 char subsys
[UTIL_PATH_SIZE
];
753 if (sscanf(id
, "%c%i:%i", &type
, &maj
, &min
) != 3)
755 return udev_device_new_from_devnum(udev
, type
, makedev(maj
, min
));
759 struct udev_device
*dev
;
762 ifindex
= strtoul(&id
[1], NULL
, 10);
766 sk
= socket(PF_INET
, SOCK_DGRAM
, 0);
769 memset(&ifr
, 0x00, sizeof(struct ifreq
));
770 ifr
.ifr_ifindex
= ifindex
;
771 if (ioctl(sk
, SIOCGIFNAME
, &ifr
) != 0) {
777 dev
= udev_device_new_from_subsystem_sysname(udev
, "net", ifr
.ifr_name
);
780 if (udev_device_get_ifindex(dev
) == ifindex
)
782 udev_device_unref(dev
);
786 util_strscpy(subsys
, sizeof(subsys
), &id
[1]);
787 sysname
= strchr(subsys
, ':');
791 sysname
= &sysname
[1];
792 return udev_device_new_from_subsystem_sysname(udev
, subsys
, sysname
);
799 * udev_device_new_from_subsystem_sysname:
800 * @udev: udev library context
801 * @subsystem: the subsystem of the device
802 * @sysname: the name of the device
804 * Create new udev device, and fill in information from the sys device
805 * and the udev database entry. The device is looked up by the subsystem
806 * and name string of the device, like "mem" / "zero", or "block" / "sda".
808 * The initial refcount is 1, and needs to be decremented to
809 * release the resources of the udev device.
811 * Returns: a new udev device, or #NULL, if it does not exist
813 _public_
struct udev_device
*udev_device_new_from_subsystem_sysname(struct udev
*udev
, const char *subsystem
, const char *sysname
)
815 char path
[UTIL_PATH_SIZE
];
818 if (streq(subsystem
, "subsystem")) {
819 util_strscpyl(path
, sizeof(path
), "/sys/subsystem/", sysname
, NULL
);
820 if (stat(path
, &statbuf
) == 0)
823 util_strscpyl(path
, sizeof(path
), "/sys/bus/", sysname
, NULL
);
824 if (stat(path
, &statbuf
) == 0)
827 util_strscpyl(path
, sizeof(path
), "/sys/class/", sysname
, NULL
);
828 if (stat(path
, &statbuf
) == 0)
833 if (streq(subsystem
, "module")) {
834 util_strscpyl(path
, sizeof(path
), "/sys/module/", sysname
, NULL
);
835 if (stat(path
, &statbuf
) == 0)
840 if (streq(subsystem
, "drivers")) {
841 char subsys
[UTIL_NAME_SIZE
];
844 util_strscpy(subsys
, sizeof(subsys
), sysname
);
845 driver
= strchr(subsys
, ':');
846 if (driver
!= NULL
) {
850 util_strscpyl(path
, sizeof(path
), "/sys/subsystem/", subsys
, "/drivers/", driver
, NULL
);
851 if (stat(path
, &statbuf
) == 0)
854 util_strscpyl(path
, sizeof(path
), "/sys/bus/", subsys
, "/drivers/", driver
, NULL
);
855 if (stat(path
, &statbuf
) == 0)
861 util_strscpyl(path
, sizeof(path
), "/sys/subsystem/", subsystem
, "/devices/", sysname
, NULL
);
862 if (stat(path
, &statbuf
) == 0)
865 util_strscpyl(path
, sizeof(path
), "/sys/bus/", subsystem
, "/devices/", sysname
, NULL
);
866 if (stat(path
, &statbuf
) == 0)
869 util_strscpyl(path
, sizeof(path
), "/sys/class/", subsystem
, "/", sysname
, NULL
);
870 if (stat(path
, &statbuf
) == 0)
875 return udev_device_new_from_syspath(udev
, path
);
879 * udev_device_new_from_environment
880 * @udev: udev library context
882 * Create new udev device, and fill in information from the
883 * current process environment. This only works reliable if
884 * the process is called from a udev rule. It is usually used
885 * for tools executed from IMPORT= rules.
887 * The initial refcount is 1, and needs to be decremented to
888 * release the resources of the udev device.
890 * Returns: a new udev device, or #NULL, if it does not exist
892 _public_
struct udev_device
*udev_device_new_from_environment(struct udev
*udev
)
895 struct udev_device
*udev_device
;
897 udev_device
= udev_device_new(udev
);
898 if (udev_device
== NULL
)
900 udev_device_set_info_loaded(udev_device
);
902 for (i
= 0; environ
[i
] != NULL
; i
++)
903 udev_device_add_property_from_string_parse(udev_device
, environ
[i
]);
905 if (udev_device_add_property_from_string_parse_finish(udev_device
) < 0) {
906 udev_dbg(udev
, "missing values, invalid device\n");
907 udev_device_unref(udev_device
);
914 static struct udev_device
*device_new_from_parent(struct udev_device
*udev_device
)
916 struct udev_device
*udev_device_parent
= NULL
;
917 char path
[UTIL_PATH_SIZE
];
920 util_strscpy(path
, sizeof(path
), udev_device
->syspath
);
921 subdir
= path
+ strlen("/sys/");
925 pos
= strrchr(subdir
, '/');
926 if (pos
== NULL
|| pos
< &subdir
[2])
929 udev_device_parent
= udev_device_new_from_syspath(udev_device
->udev
, path
);
930 if (udev_device_parent
!= NULL
)
931 return udev_device_parent
;
937 * udev_device_get_parent:
938 * @udev_device: the device to start searching from
940 * Find the next parent device, and fill in information from the sys
941 * device and the udev database entry.
943 * The returned the device is not referenced. It is attached to the
944 * child device, and will be cleaned up when the child device
947 * It is not necessarily just the upper level directory, empty or not
948 * recognized sys directories are ignored.
950 * It can be called as many times as needed, without caring about
953 * Returns: a new udev device, or #NULL, if it no parent exist.
955 _public_
struct udev_device
*udev_device_get_parent(struct udev_device
*udev_device
)
957 if (udev_device
== NULL
)
959 if (!udev_device
->parent_set
) {
960 udev_device
->parent_set
= true;
961 udev_device
->parent_device
= device_new_from_parent(udev_device
);
963 return udev_device
->parent_device
;
967 * udev_device_get_parent_with_subsystem_devtype:
968 * @udev_device: udev device to start searching from
969 * @subsystem: the subsystem of the device
970 * @devtype: the type (DEVTYPE) of the device
972 * Find the next parent device, with a matching subsystem and devtype
973 * value, and fill in information from the sys device and the udev
976 * If devtype is #NULL, only subsystem is checked, and any devtype will
979 * The returned the device is not referenced. It is attached to the
980 * child device, and will be cleaned up when the child device
983 * It can be called as many times as needed, without caring about
986 * Returns: a new udev device, or #NULL if no matching parent exists.
988 _public_
struct udev_device
*udev_device_get_parent_with_subsystem_devtype(struct udev_device
*udev_device
, const char *subsystem
, const char *devtype
)
990 struct udev_device
*parent
;
992 if (subsystem
== NULL
)
995 parent
= udev_device_get_parent(udev_device
);
996 while (parent
!= NULL
) {
997 const char *parent_subsystem
;
998 const char *parent_devtype
;
1000 parent_subsystem
= udev_device_get_subsystem(parent
);
1001 if (parent_subsystem
!= NULL
&& streq(parent_subsystem
, subsystem
)) {
1002 if (devtype
== NULL
)
1004 parent_devtype
= udev_device_get_devtype(parent
);
1005 if (parent_devtype
!= NULL
&& streq(parent_devtype
, devtype
))
1008 parent
= udev_device_get_parent(parent
);
1014 * udev_device_get_udev:
1015 * @udev_device: udev device
1017 * Retrieve the udev library context the device was created with.
1019 * Returns: the udev library context
1021 _public_
struct udev
*udev_device_get_udev(struct udev_device
*udev_device
)
1023 if (udev_device
== NULL
)
1025 return udev_device
->udev
;
1030 * @udev_device: udev device
1032 * Take a reference of a udev device.
1034 * Returns: the passed udev device
1036 _public_
struct udev_device
*udev_device_ref(struct udev_device
*udev_device
)
1038 if (udev_device
== NULL
)
1040 udev_device
->refcount
++;
1045 * udev_device_unref:
1046 * @udev_device: udev device
1048 * Drop a reference of a udev device. If the refcount reaches zero,
1049 * the resources of the device will be released.
1051 * Returns: the passed udev device if it has still an active reference, or #NULL otherwise.
1053 _public_
struct udev_device
*udev_device_unref(struct udev_device
*udev_device
)
1055 if (udev_device
== NULL
)
1057 udev_device
->refcount
--;
1058 if (udev_device
->refcount
> 0)
1060 if (udev_device
->parent_device
!= NULL
)
1061 udev_device_unref(udev_device
->parent_device
);
1062 free(udev_device
->syspath
);
1063 free(udev_device
->sysname
);
1064 free(udev_device
->devnode
);
1065 free(udev_device
->subsystem
);
1066 free(udev_device
->devtype
);
1067 udev_list_cleanup(&udev_device
->devlinks_list
);
1068 udev_list_cleanup(&udev_device
->properties_list
);
1069 udev_list_cleanup(&udev_device
->sysattr_value_list
);
1070 udev_list_cleanup(&udev_device
->sysattr_list
);
1071 udev_list_cleanup(&udev_device
->tags_list
);
1072 free(udev_device
->action
);
1073 free(udev_device
->driver
);
1074 free(udev_device
->devpath_old
);
1075 free(udev_device
->id_filename
);
1076 free(udev_device
->envp
);
1077 free(udev_device
->monitor_buf
);
1083 * udev_device_get_devpath:
1084 * @udev_device: udev device
1086 * Retrieve the kernel devpath value of the udev device. The path
1087 * does not contain the sys mount point, and starts with a '/'.
1089 * Returns: the devpath of the udev device
1091 _public_
const char *udev_device_get_devpath(struct udev_device
*udev_device
)
1093 if (udev_device
== NULL
)
1095 return udev_device
->devpath
;
1099 * udev_device_get_syspath:
1100 * @udev_device: udev device
1102 * Retrieve the sys path of the udev device. The path is an
1103 * absolute path and starts with the sys mount point.
1105 * Returns: the sys path of the udev device
1107 _public_
const char *udev_device_get_syspath(struct udev_device
*udev_device
)
1109 if (udev_device
== NULL
)
1111 return udev_device
->syspath
;
1115 * udev_device_get_sysname:
1116 * @udev_device: udev device
1118 * Get the kernel device name in /sys.
1120 * Returns: the name string of the device device
1122 _public_
const char *udev_device_get_sysname(struct udev_device
*udev_device
)
1124 if (udev_device
== NULL
)
1126 return udev_device
->sysname
;
1130 * udev_device_get_sysnum:
1131 * @udev_device: udev device
1133 * Get the instance number of the device.
1135 * Returns: the trailing number string of the device name
1137 _public_
const char *udev_device_get_sysnum(struct udev_device
*udev_device
)
1139 if (udev_device
== NULL
)
1141 return udev_device
->sysnum
;
1145 * udev_device_get_devnode:
1146 * @udev_device: udev device
1148 * Retrieve the device node file name belonging to the udev device.
1149 * The path is an absolute path, and starts with the device directory.
1151 * Returns: the device node file name of the udev device, or #NULL if no device node exists
1153 _public_
const char *udev_device_get_devnode(struct udev_device
*udev_device
)
1155 if (udev_device
== NULL
)
1157 if (udev_device
->devnode
!= NULL
)
1158 return udev_device
->devnode
;
1159 if (!udev_device
->info_loaded
)
1160 udev_device_read_uevent_file(udev_device
);
1161 return udev_device
->devnode
;
1165 * udev_device_get_devlinks_list_entry:
1166 * @udev_device: udev device
1168 * Retrieve the list of device links pointing to the device file of
1169 * the udev device. The next list entry can be retrieved with
1170 * udev_list_entry_get_next(), which returns #NULL if no more entries exist.
1171 * The devlink path can be retrieved from the list entry by
1172 * udev_list_entry_get_name(). The path is an absolute path, and starts with
1173 * the device directory.
1175 * Returns: the first entry of the device node link list
1177 _public_
struct udev_list_entry
*udev_device_get_devlinks_list_entry(struct udev_device
*udev_device
)
1179 if (udev_device
== NULL
)
1181 if (!udev_device
->info_loaded
)
1182 udev_device_read_db(udev_device
, NULL
);
1183 return udev_list_get_entry(&udev_device
->devlinks_list
);
1186 void udev_device_cleanup_devlinks_list(struct udev_device
*udev_device
)
1188 udev_device
->devlinks_uptodate
= false;
1189 udev_list_cleanup(&udev_device
->devlinks_list
);
1193 * udev_device_get_properties_list_entry:
1194 * @udev_device: udev device
1196 * Retrieve the list of key/value device properties of the udev
1197 * device. The next list entry can be retrieved with udev_list_entry_get_next(),
1198 * which returns #NULL if no more entries exist. The property name
1199 * can be retrieved from the list entry by udev_list_entry_get_name(),
1200 * the property value by udev_list_entry_get_value().
1202 * Returns: the first entry of the property list
1204 _public_
struct udev_list_entry
*udev_device_get_properties_list_entry(struct udev_device
*udev_device
)
1206 if (udev_device
== NULL
)
1208 if (!udev_device
->info_loaded
) {
1209 udev_device_read_uevent_file(udev_device
);
1210 udev_device_read_db(udev_device
, NULL
);
1212 if (!udev_device
->devlinks_uptodate
) {
1213 char symlinks
[UTIL_PATH_SIZE
];
1214 struct udev_list_entry
*list_entry
;
1216 udev_device
->devlinks_uptodate
= true;
1217 list_entry
= udev_device_get_devlinks_list_entry(udev_device
);
1218 if (list_entry
!= NULL
) {
1223 l
= util_strpcpyl(&s
, sizeof(symlinks
), udev_list_entry_get_name(list_entry
), NULL
);
1224 udev_list_entry_foreach(list_entry
, udev_list_entry_get_next(list_entry
))
1225 l
= util_strpcpyl(&s
, l
, " ", udev_list_entry_get_name(list_entry
), NULL
);
1226 udev_device_add_property(udev_device
, "DEVLINKS", symlinks
);
1229 if (!udev_device
->tags_uptodate
) {
1230 udev_device
->tags_uptodate
= true;
1231 if (udev_device_get_tags_list_entry(udev_device
) != NULL
) {
1232 char tags
[UTIL_PATH_SIZE
];
1233 struct udev_list_entry
*list_entry
;
1238 l
= util_strpcpyl(&s
, sizeof(tags
), ":", NULL
);
1239 udev_list_entry_foreach(list_entry
, udev_device_get_tags_list_entry(udev_device
))
1240 l
= util_strpcpyl(&s
, l
, udev_list_entry_get_name(list_entry
), ":", NULL
);
1241 udev_device_add_property(udev_device
, "TAGS", tags
);
1244 return udev_list_get_entry(&udev_device
->properties_list
);
1248 * udev_device_get_action:
1249 * @udev_device: udev device
1251 * This is only valid if the device was received through a monitor. Devices read from
1252 * sys do not have an action string. Usual actions are: add, remove, change, online,
1255 * Returns: the kernel action value, or #NULL if there is no action value available.
1257 _public_
const char *udev_device_get_action(struct udev_device
*udev_device
)
1259 if (udev_device
== NULL
)
1261 return udev_device
->action
;
1265 * udev_device_get_usec_since_initialized:
1266 * @udev_device: udev device
1268 * Return the number of microseconds passed since udev set up the
1269 * device for the first time.
1271 * This is only implemented for devices with need to store properties
1272 * in the udev database. All other devices return 0 here.
1274 * Returns: the number of microseconds since the device was first seen.
1276 _public_
unsigned long long int udev_device_get_usec_since_initialized(struct udev_device
*udev_device
)
1280 if (udev_device
== NULL
)
1282 if (!udev_device
->info_loaded
)
1283 udev_device_read_db(udev_device
, NULL
);
1284 if (udev_device
->usec_initialized
== 0)
1286 now_ts
= now(CLOCK_MONOTONIC
);
1289 return now_ts
- udev_device
->usec_initialized
;
1292 usec_t
udev_device_get_usec_initialized(struct udev_device
*udev_device
)
1294 return udev_device
->usec_initialized
;
1297 void udev_device_set_usec_initialized(struct udev_device
*udev_device
, usec_t usec_initialized
)
1301 udev_device
->usec_initialized
= usec_initialized
;
1302 snprintf(num
, sizeof(num
), "%llu", (unsigned long long)usec_initialized
);
1303 udev_device_add_property(udev_device
, "USEC_INITIALIZED", num
);
1307 * udev_device_get_sysattr_value:
1308 * @udev_device: udev device
1309 * @sysattr: attribute name
1311 * The retrieved value is cached in the device. Repeated calls will return the same
1312 * value and not open the attribute again.
1314 * Returns: the content of a sys attribute file, or #NULL if there is no sys attribute value.
1316 _public_
const char *udev_device_get_sysattr_value(struct udev_device
*udev_device
, const char *sysattr
)
1318 struct udev_list_entry
*list_entry
;
1319 char path
[UTIL_PATH_SIZE
];
1321 struct stat statbuf
;
1324 const char *val
= NULL
;
1326 if (udev_device
== NULL
)
1328 if (sysattr
== NULL
)
1331 /* look for possibly already cached result */
1332 list_entry
= udev_list_get_entry(&udev_device
->sysattr_value_list
);
1333 list_entry
= udev_list_entry_get_by_name(list_entry
, sysattr
);
1334 if (list_entry
!= NULL
)
1335 return udev_list_entry_get_value(list_entry
);
1337 util_strscpyl(path
, sizeof(path
), udev_device_get_syspath(udev_device
), "/", sysattr
, NULL
);
1338 if (lstat(path
, &statbuf
) != 0) {
1339 udev_list_entry_add(&udev_device
->sysattr_value_list
, sysattr
, NULL
);
1343 if (S_ISLNK(statbuf
.st_mode
)) {
1344 struct udev_device
*dev
;
1347 * Some core links return only the last element of the target path,
1348 * these are just values, the paths should not be exposed.
1350 if (streq(sysattr
, "driver") ||
1351 streq(sysattr
, "subsystem") ||
1352 streq(sysattr
, "module")) {
1353 if (util_get_sys_core_link_value(udev_device
->udev
, sysattr
,
1354 udev_device
->syspath
, value
, sizeof(value
)) < 0)
1356 list_entry
= udev_list_entry_add(&udev_device
->sysattr_value_list
, sysattr
, value
);
1357 val
= udev_list_entry_get_value(list_entry
);
1361 /* resolve link to a device and return its syspath */
1362 util_strscpyl(path
, sizeof(path
), udev_device
->syspath
, "/", sysattr
, NULL
);
1363 dev
= udev_device_new_from_syspath(udev_device
->udev
, path
);
1365 list_entry
= udev_list_entry_add(&udev_device
->sysattr_value_list
, sysattr
,
1366 udev_device_get_syspath(dev
));
1367 val
= udev_list_entry_get_value(list_entry
);
1368 udev_device_unref(dev
);
1374 /* skip directories */
1375 if (S_ISDIR(statbuf
.st_mode
))
1378 /* skip non-readable files */
1379 if ((statbuf
.st_mode
& S_IRUSR
) == 0)
1382 /* read attribute value */
1383 fd
= open(path
, O_RDONLY
|O_CLOEXEC
);
1386 size
= read(fd
, value
, sizeof(value
));
1390 if (size
== sizeof(value
))
1393 /* got a valid value, store it in cache and return it */
1395 util_remove_trailing_chars(value
, '\n');
1396 list_entry
= udev_list_entry_add(&udev_device
->sysattr_value_list
, sysattr
, value
);
1397 val
= udev_list_entry_get_value(list_entry
);
1402 static int udev_device_sysattr_list_read(struct udev_device
*udev_device
)
1404 struct dirent
*dent
;
1408 if (udev_device
== NULL
)
1410 if (udev_device
->sysattr_list_read
)
1413 dir
= opendir(udev_device_get_syspath(udev_device
));
1417 for (dent
= readdir(dir
); dent
!= NULL
; dent
= readdir(dir
)) {
1418 char path
[UTIL_PATH_SIZE
];
1419 struct stat statbuf
;
1421 /* only handle symlinks and regular files */
1422 if (dent
->d_type
!= DT_LNK
&& dent
->d_type
!= DT_REG
)
1425 util_strscpyl(path
, sizeof(path
), udev_device_get_syspath(udev_device
), "/", dent
->d_name
, NULL
);
1426 if (lstat(path
, &statbuf
) != 0)
1428 if ((statbuf
.st_mode
& S_IRUSR
) == 0)
1431 udev_list_entry_add(&udev_device
->sysattr_list
, dent
->d_name
, NULL
);
1436 udev_device
->sysattr_list_read
= true;
1442 * udev_device_get_sysattr_list_entry:
1443 * @udev_device: udev device
1445 * Retrieve the list of available sysattrs, with value being empty;
1446 * This just return all available sysfs attributes for a particular
1447 * device without reading their values.
1449 * Returns: the first entry of the property list
1451 _public_
struct udev_list_entry
*udev_device_get_sysattr_list_entry(struct udev_device
*udev_device
)
1453 if (!udev_device
->sysattr_list_read
) {
1455 ret
= udev_device_sysattr_list_read(udev_device
);
1460 return udev_list_get_entry(&udev_device
->sysattr_list
);
1463 int udev_device_set_syspath(struct udev_device
*udev_device
, const char *syspath
)
1468 free(udev_device
->syspath
);
1469 udev_device
->syspath
= strdup(syspath
);
1470 if (udev_device
->syspath
== NULL
)
1472 udev_device
->devpath
= udev_device
->syspath
+ strlen("/sys");
1473 udev_device_add_property(udev_device
, "DEVPATH", udev_device
->devpath
);
1475 pos
= strrchr(udev_device
->syspath
, '/');
1478 udev_device
->sysname
= strdup(&pos
[1]);
1479 if (udev_device
->sysname
== NULL
)
1482 /* some devices have '!' in their name, change that to '/' */
1484 while (udev_device
->sysname
[len
] != '\0') {
1485 if (udev_device
->sysname
[len
] == '!')
1486 udev_device
->sysname
[len
] = '/';
1490 /* trailing number */
1491 while (len
> 0 && isdigit(udev_device
->sysname
[--len
]))
1492 udev_device
->sysnum
= &udev_device
->sysname
[len
];
1494 /* sysname is completely numeric */
1496 udev_device
->sysnum
= NULL
;
1501 int udev_device_set_devnode(struct udev_device
*udev_device
, const char *devnode
)
1503 free(udev_device
->devnode
);
1504 if (devnode
[0] != '/') {
1505 if (asprintf(&udev_device
->devnode
, "/dev/%s", devnode
) < 0)
1506 udev_device
->devnode
= NULL
;
1508 udev_device
->devnode
= strdup(devnode
);
1510 if (udev_device
->devnode
== NULL
)
1512 udev_device_add_property(udev_device
, "DEVNAME", udev_device
->devnode
);
1516 int udev_device_add_devlink(struct udev_device
*udev_device
, const char *devlink
)
1518 struct udev_list_entry
*list_entry
;
1520 udev_device
->devlinks_uptodate
= false;
1521 list_entry
= udev_list_entry_add(&udev_device
->devlinks_list
, devlink
, NULL
);
1522 if (list_entry
== NULL
)
1527 const char *udev_device_get_id_filename(struct udev_device
*udev_device
)
1529 if (udev_device
->id_filename
== NULL
) {
1530 if (udev_device_get_subsystem(udev_device
) == NULL
)
1533 if (major(udev_device_get_devnum(udev_device
)) > 0) {
1534 /* use dev_t -- b259:131072, c254:0 */
1535 if (asprintf(&udev_device
->id_filename
, "%c%u:%u",
1536 streq(udev_device_get_subsystem(udev_device
), "block") ? 'b' : 'c',
1537 major(udev_device_get_devnum(udev_device
)),
1538 minor(udev_device_get_devnum(udev_device
))) < 0)
1539 udev_device
->id_filename
= NULL
;
1540 } else if (udev_device_get_ifindex(udev_device
) > 0) {
1541 /* use netdev ifindex -- n3 */
1542 if (asprintf(&udev_device
->id_filename
, "n%u", udev_device_get_ifindex(udev_device
)) < 0)
1543 udev_device
->id_filename
= NULL
;
1546 * use $subsys:$syname -- pci:0000:00:1f.2
1547 * sysname() has '!' translated, get it from devpath
1549 const char *sysname
;
1550 sysname
= strrchr(udev_device
->devpath
, '/');
1551 if (sysname
== NULL
)
1553 sysname
= &sysname
[1];
1554 if (asprintf(&udev_device
->id_filename
, "+%s:%s", udev_device_get_subsystem(udev_device
), sysname
) < 0)
1555 udev_device
->id_filename
= NULL
;
1558 return udev_device
->id_filename
;
1562 * udev_device_get_is_initialized:
1563 * @udev_device: udev device
1565 * Check if udev has already handled the device and has set up
1566 * device node permissions and context, or has renamed a network
1569 * This is only implemented for devices with a device node
1570 * or network interfaces. All other devices return 1 here.
1572 * Returns: 1 if the device is set up. 0 otherwise.
1574 _public_
int udev_device_get_is_initialized(struct udev_device
*udev_device
)
1576 if (!udev_device
->info_loaded
)
1577 udev_device_read_db(udev_device
, NULL
);
1578 return udev_device
->is_initialized
;
1581 void udev_device_set_is_initialized(struct udev_device
*udev_device
)
1583 udev_device
->is_initialized
= true;
1586 int udev_device_add_tag(struct udev_device
*udev_device
, const char *tag
)
1588 if (strchr(tag
, ':') != NULL
|| strchr(tag
, ' ') != NULL
)
1590 udev_device
->tags_uptodate
= false;
1591 if (udev_list_entry_add(&udev_device
->tags_list
, tag
, NULL
) != NULL
)
1596 void udev_device_cleanup_tags_list(struct udev_device
*udev_device
)
1598 udev_device
->tags_uptodate
= false;
1599 udev_list_cleanup(&udev_device
->tags_list
);
1603 * udev_device_get_tags_list_entry:
1604 * @udev_device: udev device
1606 * Retrieve the list of tags attached to the udev device. The next
1607 * list entry can be retrieved with udev_list_entry_get_next(),
1608 * which returns #NULL if no more entries exist. The tag string
1609 * can be retrieved from the list entry by udev_list_entry_get_name().
1611 * Returns: the first entry of the tag list
1613 _public_
struct udev_list_entry
*udev_device_get_tags_list_entry(struct udev_device
*udev_device
)
1615 if (udev_device
== NULL
)
1617 if (!udev_device
->info_loaded
)
1618 udev_device_read_db(udev_device
, NULL
);
1619 return udev_list_get_entry(&udev_device
->tags_list
);
1623 * udev_device_has_tag:
1624 * @udev_device: udev device
1627 * Check if a given device has a certain tag associated.
1629 * Returns: 1 if the tag is found. 0 otherwise.
1631 _public_
int udev_device_has_tag(struct udev_device
*udev_device
, const char *tag
)
1633 struct udev_list_entry
*list_entry
;
1635 if (udev_device
== NULL
)
1637 if (!udev_device
->info_loaded
)
1638 udev_device_read_db(udev_device
, NULL
);
1639 list_entry
= udev_device_get_tags_list_entry(udev_device
);
1640 if (udev_list_entry_get_by_name(list_entry
, tag
) != NULL
)
1645 #define ENVP_SIZE 128
1646 #define MONITOR_BUF_SIZE 4096
1647 static int update_envp_monitor_buf(struct udev_device
*udev_device
)
1649 struct udev_list_entry
*list_entry
;
1654 /* monitor buffer of property strings */
1655 free(udev_device
->monitor_buf
);
1656 udev_device
->monitor_buf_len
= 0;
1657 udev_device
->monitor_buf
= malloc(MONITOR_BUF_SIZE
);
1658 if (udev_device
->monitor_buf
== NULL
)
1661 /* envp array, strings will point into monitor buffer */
1662 if (udev_device
->envp
== NULL
)
1663 udev_device
->envp
= malloc(sizeof(char *) * ENVP_SIZE
);
1664 if (udev_device
->envp
== NULL
)
1668 s
= udev_device
->monitor_buf
;
1669 l
= MONITOR_BUF_SIZE
;
1670 udev_list_entry_foreach(list_entry
, udev_device_get_properties_list_entry(udev_device
)) {
1673 key
= udev_list_entry_get_name(list_entry
);
1674 /* skip private variables */
1678 /* add string to envp array */
1679 udev_device
->envp
[i
++] = s
;
1680 if (i
+1 >= ENVP_SIZE
)
1683 /* add property string to monitor buffer */
1684 l
= util_strpcpyl(&s
, l
, key
, "=", udev_list_entry_get_value(list_entry
), NULL
);
1687 /* advance past the trailing '\0' that util_strpcpyl() guarantees */
1691 udev_device
->envp
[i
] = NULL
;
1692 udev_device
->monitor_buf_len
= s
- udev_device
->monitor_buf
;
1693 udev_device
->envp_uptodate
= true;
1697 char **udev_device_get_properties_envp(struct udev_device
*udev_device
)
1699 if (!udev_device
->envp_uptodate
)
1700 if (update_envp_monitor_buf(udev_device
) != 0)
1702 return udev_device
->envp
;
1705 ssize_t
udev_device_get_properties_monitor_buf(struct udev_device
*udev_device
, const char **buf
)
1707 if (!udev_device
->envp_uptodate
)
1708 if (update_envp_monitor_buf(udev_device
) != 0)
1710 *buf
= udev_device
->monitor_buf
;
1711 return udev_device
->monitor_buf_len
;
1714 int udev_device_set_action(struct udev_device
*udev_device
, const char *action
)
1716 free(udev_device
->action
);
1717 udev_device
->action
= strdup(action
);
1718 if (udev_device
->action
== NULL
)
1720 udev_device_add_property(udev_device
, "ACTION", udev_device
->action
);
1724 int udev_device_get_devlink_priority(struct udev_device
*udev_device
)
1726 if (!udev_device
->info_loaded
)
1727 udev_device_read_db(udev_device
, NULL
);
1728 return udev_device
->devlink_priority
;
1731 int udev_device_set_devlink_priority(struct udev_device
*udev_device
, int prio
)
1733 udev_device
->devlink_priority
= prio
;
1737 int udev_device_get_watch_handle(struct udev_device
*udev_device
)
1739 if (!udev_device
->info_loaded
)
1740 udev_device_read_db(udev_device
, NULL
);
1741 return udev_device
->watch_handle
;
1744 int udev_device_set_watch_handle(struct udev_device
*udev_device
, int handle
)
1746 udev_device
->watch_handle
= handle
;
1750 bool udev_device_get_db_persist(struct udev_device
*udev_device
)
1752 return udev_device
->db_persist
;
1755 void udev_device_set_db_persist(struct udev_device
*udev_device
)
1757 udev_device
->db_persist
= true;