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88a6477e KS |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2008-2012 Kay Sievers <kay@vrfy.org> | |
5 | ||
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. | |
10 | ||
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. | |
15 | ||
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/>. | |
18 | ***/ | |
eb1f0e66 | 19 | |
eb1f0e66 KS |
20 | #include <stdio.h> |
21 | #include <stdlib.h> | |
22 | #include <stddef.h> | |
23 | #include <unistd.h> | |
fc8d61c5 | 24 | #include <stdbool.h> |
eb1f0e66 KS |
25 | #include <errno.h> |
26 | #include <string.h> | |
27 | #include <dirent.h> | |
93b0f384 | 28 | #include <fcntl.h> |
517814e7 | 29 | #include <ctype.h> |
3e0a2c9a | 30 | #include <net/if.h> |
eb1f0e66 | 31 | #include <sys/stat.h> |
3e0a2c9a KS |
32 | #include <sys/ioctl.h> |
33 | #include <sys/socket.h> | |
34 | #include <linux/sockios.h> | |
eb1f0e66 KS |
35 | |
36 | #include "libudev.h" | |
37 | #include "libudev-private.h" | |
eb1f0e66 | 38 | |
b2661839 | 39 | static int udev_device_set_devnode(struct udev_device *udev_device, const char *devnode); |
df546eb5 | 40 | static struct udev_list_entry *udev_device_add_property_internal(struct udev_device *udev_device, const char *key, const char *value); |
b2661839 | 41 | |
ce1d6d7f KS |
42 | /** |
43 | * SECTION:libudev-device | |
44 | * @short_description: kernel sys devices | |
45 | * | |
46 | * Representation of kernel sys devices. Devices are uniquely identified | |
47 | * by their syspath, every device has exactly one path in the kernel sys | |
5eec7de6 | 48 | * filesystem. Devices usually belong to a kernel subsystem, and have |
214a6c79 | 49 | * a unique name inside that subsystem. |
ce1d6d7f KS |
50 | */ |
51 | ||
1e511322 KS |
52 | /** |
53 | * udev_device: | |
54 | * | |
ce1d6d7f | 55 | * Opaque object representing one kernel sys device. |
1e511322 | 56 | */ |
11d543c1 | 57 | struct udev_device { |
912541b0 KS |
58 | struct udev *udev; |
59 | struct udev_device *parent_device; | |
60 | char *syspath; | |
61 | const char *devpath; | |
62 | char *sysname; | |
63 | const char *sysnum; | |
64 | char *devnode; | |
65 | mode_t devnode_mode; | |
1edefa4f KS |
66 | uid_t devnode_uid; |
67 | gid_t devnode_gid; | |
912541b0 KS |
68 | char *subsystem; |
69 | char *devtype; | |
70 | char *driver; | |
71 | char *action; | |
72 | char *devpath_old; | |
73 | char *id_filename; | |
74 | char **envp; | |
75 | char *monitor_buf; | |
76 | size_t monitor_buf_len; | |
77 | struct udev_list devlinks_list; | |
78 | struct udev_list properties_list; | |
79 | struct udev_list sysattr_value_list; | |
80 | struct udev_list sysattr_list; | |
81 | struct udev_list tags_list; | |
82 | unsigned long long int seqnum; | |
40fe8b11 | 83 | usec_t usec_initialized; |
912541b0 KS |
84 | int devlink_priority; |
85 | int refcount; | |
86 | dev_t devnum; | |
87 | int ifindex; | |
88 | int watch_handle; | |
89 | int maj, min; | |
90 | bool parent_set; | |
91 | bool subsystem_set; | |
92 | bool devtype_set; | |
93 | bool devlinks_uptodate; | |
94 | bool envp_uptodate; | |
95 | bool tags_uptodate; | |
96 | bool driver_set; | |
97 | bool info_loaded; | |
98 | bool db_loaded; | |
99 | bool uevent_loaded; | |
100 | bool is_initialized; | |
101 | bool sysattr_list_read; | |
102 | bool db_persist; | |
11d543c1 KS |
103 | }; |
104 | ||
905555dc | 105 | /** |
a3321f68 | 106 | * udev_device_get_seqnum: |
905555dc KS |
107 | * @udev_device: udev device |
108 | * | |
109 | * This is only valid if the device was received through a monitor. Devices read from | |
110 | * sys do not have a sequence number. | |
111 | * | |
112 | * Returns: the kernel event sequence number, or 0 if there is no sequence number available. | |
113 | **/ | |
54cf0b7f | 114 | _public_ unsigned long long int udev_device_get_seqnum(struct udev_device *udev_device) |
905555dc | 115 | { |
912541b0 KS |
116 | if (udev_device == NULL) |
117 | return 0; | |
118 | return udev_device->seqnum; | |
905555dc KS |
119 | } |
120 | ||
121 | static int udev_device_set_seqnum(struct udev_device *udev_device, unsigned long long int seqnum) | |
122 | { | |
912541b0 | 123 | char num[32]; |
905555dc | 124 | |
912541b0 KS |
125 | udev_device->seqnum = seqnum; |
126 | snprintf(num, sizeof(num), "%llu", seqnum); | |
df546eb5 | 127 | udev_device_add_property_internal(udev_device, "SEQNUM", num); |
912541b0 | 128 | return 0; |
905555dc KS |
129 | } |
130 | ||
131 | int udev_device_get_ifindex(struct udev_device *udev_device) | |
132 | { | |
912541b0 KS |
133 | if (!udev_device->info_loaded) |
134 | udev_device_read_uevent_file(udev_device); | |
135 | return udev_device->ifindex; | |
905555dc KS |
136 | } |
137 | ||
138 | static int udev_device_set_ifindex(struct udev_device *udev_device, int ifindex) | |
139 | { | |
912541b0 | 140 | char num[32]; |
905555dc | 141 | |
912541b0 | 142 | udev_device->ifindex = ifindex; |
c4ef0548 | 143 | snprintf(num, sizeof(num), "%d", ifindex); |
df546eb5 | 144 | udev_device_add_property_internal(udev_device, "IFINDEX", num); |
912541b0 | 145 | return 0; |
905555dc KS |
146 | } |
147 | ||
148 | /** | |
149 | * udev_device_get_devnum: | |
150 | * @udev_device: udev device | |
151 | * | |
21dbe43a KS |
152 | * Get the device major/minor number. |
153 | * | |
154 | * Returns: the dev_t number. | |
905555dc | 155 | **/ |
54cf0b7f | 156 | _public_ dev_t udev_device_get_devnum(struct udev_device *udev_device) |
905555dc | 157 | { |
912541b0 KS |
158 | if (udev_device == NULL) |
159 | return makedev(0, 0); | |
160 | if (!udev_device->info_loaded) | |
161 | udev_device_read_uevent_file(udev_device); | |
162 | return udev_device->devnum; | |
905555dc KS |
163 | } |
164 | ||
71ef8b3a | 165 | static int udev_device_set_devnum(struct udev_device *udev_device, dev_t devnum) |
905555dc | 166 | { |
912541b0 | 167 | char num[32]; |
905555dc | 168 | |
912541b0 | 169 | udev_device->devnum = devnum; |
905555dc | 170 | |
912541b0 | 171 | snprintf(num, sizeof(num), "%u", major(devnum)); |
df546eb5 | 172 | udev_device_add_property_internal(udev_device, "MAJOR", num); |
912541b0 | 173 | snprintf(num, sizeof(num), "%u", minor(devnum)); |
df546eb5 | 174 | udev_device_add_property_internal(udev_device, "MINOR", num); |
912541b0 | 175 | return 0; |
905555dc KS |
176 | } |
177 | ||
905555dc KS |
178 | const char *udev_device_get_devpath_old(struct udev_device *udev_device) |
179 | { | |
912541b0 | 180 | return udev_device->devpath_old; |
905555dc KS |
181 | } |
182 | ||
183 | static int udev_device_set_devpath_old(struct udev_device *udev_device, const char *devpath_old) | |
184 | { | |
912541b0 | 185 | const char *pos; |
905555dc | 186 | |
912541b0 KS |
187 | free(udev_device->devpath_old); |
188 | udev_device->devpath_old = strdup(devpath_old); | |
189 | if (udev_device->devpath_old == NULL) | |
190 | return -ENOMEM; | |
df546eb5 | 191 | udev_device_add_property_internal(udev_device, "DEVPATH_OLD", udev_device->devpath_old); |
905555dc | 192 | |
912541b0 KS |
193 | pos = strrchr(udev_device->devpath_old, '/'); |
194 | if (pos == NULL) | |
195 | return -EINVAL; | |
196 | return 0; | |
905555dc KS |
197 | } |
198 | ||
199 | /** | |
200 | * udev_device_get_driver: | |
201 | * @udev_device: udev device | |
202 | * | |
21dbe43a KS |
203 | * Get the kernel driver name. |
204 | * | |
205 | * Returns: the driver name string, or #NULL if there is no driver attached. | |
905555dc | 206 | **/ |
54cf0b7f | 207 | _public_ const char *udev_device_get_driver(struct udev_device *udev_device) |
905555dc | 208 | { |
912541b0 | 209 | char driver[UTIL_NAME_SIZE]; |
905555dc | 210 | |
912541b0 KS |
211 | if (udev_device == NULL) |
212 | return NULL; | |
213 | if (!udev_device->driver_set) { | |
214 | udev_device->driver_set = true; | |
215 | if (util_get_sys_core_link_value(udev_device->udev, "driver", udev_device->syspath, driver, sizeof(driver)) > 0) | |
216 | udev_device->driver = strdup(driver); | |
217 | } | |
218 | return udev_device->driver; | |
905555dc KS |
219 | } |
220 | ||
221 | static int udev_device_set_driver(struct udev_device *udev_device, const char *driver) | |
222 | { | |
912541b0 KS |
223 | free(udev_device->driver); |
224 | udev_device->driver = strdup(driver); | |
225 | if (udev_device->driver == NULL) | |
226 | return -ENOMEM; | |
227 | udev_device->driver_set = true; | |
df546eb5 | 228 | udev_device_add_property_internal(udev_device, "DRIVER", udev_device->driver); |
912541b0 | 229 | return 0; |
905555dc KS |
230 | } |
231 | ||
232 | /** | |
233 | * udev_device_get_devtype: | |
234 | * @udev_device: udev device | |
235 | * | |
236 | * Retrieve the devtype string of the udev device. | |
237 | * | |
238 | * Returns: the devtype name of the udev device, or #NULL if it can not be determined | |
239 | **/ | |
54cf0b7f | 240 | _public_ const char *udev_device_get_devtype(struct udev_device *udev_device) |
905555dc | 241 | { |
912541b0 KS |
242 | if (udev_device == NULL) |
243 | return NULL; | |
244 | if (!udev_device->devtype_set) { | |
245 | udev_device->devtype_set = true; | |
246 | udev_device_read_uevent_file(udev_device); | |
247 | } | |
248 | return udev_device->devtype; | |
905555dc KS |
249 | } |
250 | ||
251 | static int udev_device_set_devtype(struct udev_device *udev_device, const char *devtype) | |
252 | { | |
912541b0 KS |
253 | free(udev_device->devtype); |
254 | udev_device->devtype = strdup(devtype); | |
255 | if (udev_device->devtype == NULL) | |
256 | return -ENOMEM; | |
257 | udev_device->devtype_set = true; | |
df546eb5 | 258 | udev_device_add_property_internal(udev_device, "DEVTYPE", udev_device->devtype); |
912541b0 | 259 | return 0; |
905555dc KS |
260 | } |
261 | ||
71ef8b3a | 262 | static int udev_device_set_subsystem(struct udev_device *udev_device, const char *subsystem) |
905555dc | 263 | { |
912541b0 KS |
264 | free(udev_device->subsystem); |
265 | udev_device->subsystem = strdup(subsystem); | |
266 | if (udev_device->subsystem == NULL) | |
267 | return -ENOMEM; | |
268 | udev_device->subsystem_set = true; | |
df546eb5 | 269 | udev_device_add_property_internal(udev_device, "SUBSYSTEM", udev_device->subsystem); |
912541b0 | 270 | return 0; |
905555dc KS |
271 | } |
272 | ||
273 | /** | |
274 | * udev_device_get_subsystem: | |
275 | * @udev_device: udev device | |
276 | * | |
277 | * Retrieve the subsystem string of the udev device. The string does not | |
278 | * contain any "/". | |
279 | * | |
280 | * Returns: the subsystem name of the udev device, or #NULL if it can not be determined | |
281 | **/ | |
54cf0b7f | 282 | _public_ const char *udev_device_get_subsystem(struct udev_device *udev_device) |
905555dc | 283 | { |
912541b0 KS |
284 | char subsystem[UTIL_NAME_SIZE]; |
285 | ||
286 | if (udev_device == NULL) | |
287 | return NULL; | |
288 | if (!udev_device->subsystem_set) { | |
289 | udev_device->subsystem_set = true; | |
290 | /* read "subsystem" link */ | |
291 | if (util_get_sys_core_link_value(udev_device->udev, "subsystem", udev_device->syspath, subsystem, sizeof(subsystem)) > 0) { | |
292 | udev_device_set_subsystem(udev_device, subsystem); | |
293 | return udev_device->subsystem; | |
294 | } | |
295 | /* implicit names */ | |
33502ffe | 296 | if (startswith(udev_device->devpath, "/module/")) { |
912541b0 KS |
297 | udev_device_set_subsystem(udev_device, "module"); |
298 | return udev_device->subsystem; | |
299 | } | |
300 | if (strstr(udev_device->devpath, "/drivers/") != NULL) { | |
301 | udev_device_set_subsystem(udev_device, "drivers"); | |
302 | return udev_device->subsystem; | |
303 | } | |
33502ffe KS |
304 | if (startswith(udev_device->devpath, "/subsystem/") || |
305 | startswith(udev_device->devpath, "/class/") || | |
306 | startswith(udev_device->devpath, "/bus/")) { | |
912541b0 KS |
307 | udev_device_set_subsystem(udev_device, "subsystem"); |
308 | return udev_device->subsystem; | |
309 | } | |
310 | } | |
311 | return udev_device->subsystem; | |
905555dc KS |
312 | } |
313 | ||
314 | mode_t udev_device_get_devnode_mode(struct udev_device *udev_device) | |
315 | { | |
912541b0 KS |
316 | if (!udev_device->info_loaded) |
317 | udev_device_read_uevent_file(udev_device); | |
318 | return udev_device->devnode_mode; | |
905555dc KS |
319 | } |
320 | ||
321 | static int udev_device_set_devnode_mode(struct udev_device *udev_device, mode_t mode) | |
322 | { | |
912541b0 | 323 | char num[32]; |
905555dc | 324 | |
912541b0 KS |
325 | udev_device->devnode_mode = mode; |
326 | snprintf(num, sizeof(num), "%#o", mode); | |
df546eb5 | 327 | udev_device_add_property_internal(udev_device, "DEVMODE", num); |
912541b0 | 328 | return 0; |
905555dc KS |
329 | } |
330 | ||
1edefa4f KS |
331 | uid_t udev_device_get_devnode_uid(struct udev_device *udev_device) |
332 | { | |
333 | if (!udev_device->info_loaded) | |
334 | udev_device_read_uevent_file(udev_device); | |
335 | return udev_device->devnode_uid; | |
336 | } | |
337 | ||
338 | static int udev_device_set_devnode_uid(struct udev_device *udev_device, uid_t uid) | |
339 | { | |
340 | char num[32]; | |
341 | ||
342 | udev_device->devnode_uid = uid; | |
343 | snprintf(num, sizeof(num), "%u", uid); | |
df546eb5 | 344 | udev_device_add_property_internal(udev_device, "DEVUID", num); |
1edefa4f KS |
345 | return 0; |
346 | } | |
347 | ||
348 | gid_t udev_device_get_devnode_gid(struct udev_device *udev_device) | |
349 | { | |
350 | if (!udev_device->info_loaded) | |
351 | udev_device_read_uevent_file(udev_device); | |
352 | return udev_device->devnode_gid; | |
353 | } | |
354 | ||
355 | static int udev_device_set_devnode_gid(struct udev_device *udev_device, gid_t gid) | |
356 | { | |
357 | char num[32]; | |
358 | ||
359 | udev_device->devnode_gid = gid; | |
360 | snprintf(num, sizeof(num), "%u", gid); | |
df546eb5 | 361 | udev_device_add_property_internal(udev_device, "DEVGID", num); |
1edefa4f KS |
362 | return 0; |
363 | } | |
364 | ||
df546eb5 | 365 | static struct udev_list_entry *udev_device_add_property_internal(struct udev_device *udev_device, const char *key, const char *value) |
fc8d61c5 | 366 | { |
912541b0 KS |
367 | udev_device->envp_uptodate = false; |
368 | if (value == NULL) { | |
369 | struct udev_list_entry *list_entry; | |
fc8d61c5 | 370 | |
912541b0 KS |
371 | list_entry = udev_device_get_properties_list_entry(udev_device); |
372 | list_entry = udev_list_entry_get_by_name(list_entry, key); | |
373 | if (list_entry != NULL) | |
374 | udev_list_entry_delete(list_entry); | |
375 | return NULL; | |
376 | } | |
377 | return udev_list_entry_add(&udev_device->properties_list, key, value); | |
fc8d61c5 KS |
378 | } |
379 | ||
df546eb5 TG |
380 | |
381 | int udev_device_add_property(struct udev_device *udev_device, const char *key, const char *value) | |
382 | { | |
383 | struct udev_list_entry *property; | |
384 | ||
385 | property = udev_device_add_property_internal(udev_device, key, value); | |
386 | ||
387 | /* store in db, skip private keys */ | |
388 | if (key[0] != '.') | |
389 | udev_list_entry_set_num(property, true); | |
390 | ||
391 | return 0; | |
392 | } | |
393 | ||
fc8d61c5 KS |
394 | static struct udev_list_entry *udev_device_add_property_from_string(struct udev_device *udev_device, const char *property) |
395 | { | |
912541b0 KS |
396 | char name[UTIL_LINE_SIZE]; |
397 | char *val; | |
fc8d61c5 | 398 | |
d5a89d7d | 399 | strscpy(name, sizeof(name), property); |
912541b0 KS |
400 | val = strchr(name, '='); |
401 | if (val == NULL) | |
402 | return NULL; | |
403 | val[0] = '\0'; | |
404 | val = &val[1]; | |
405 | if (val[0] == '\0') | |
406 | val = NULL; | |
df546eb5 | 407 | return udev_device_add_property_internal(udev_device, name, val); |
fc8d61c5 KS |
408 | } |
409 | ||
71ef8b3a TG |
410 | static int udev_device_set_syspath(struct udev_device *udev_device, const char *syspath) |
411 | { | |
412 | const char *pos; | |
413 | size_t len; | |
414 | ||
415 | free(udev_device->syspath); | |
416 | udev_device->syspath = strdup(syspath); | |
417 | if (udev_device->syspath == NULL) | |
418 | return -ENOMEM; | |
419 | udev_device->devpath = udev_device->syspath + strlen("/sys"); | |
df546eb5 | 420 | udev_device_add_property_internal(udev_device, "DEVPATH", udev_device->devpath); |
71ef8b3a TG |
421 | |
422 | pos = strrchr(udev_device->syspath, '/'); | |
423 | if (pos == NULL) | |
424 | return -EINVAL; | |
425 | udev_device->sysname = strdup(&pos[1]); | |
426 | if (udev_device->sysname == NULL) | |
427 | return -ENOMEM; | |
428 | ||
429 | /* some devices have '!' in their name, change that to '/' */ | |
430 | len = 0; | |
431 | while (udev_device->sysname[len] != '\0') { | |
432 | if (udev_device->sysname[len] == '!') | |
433 | udev_device->sysname[len] = '/'; | |
434 | len++; | |
435 | } | |
436 | ||
437 | /* trailing number */ | |
438 | while (len > 0 && isdigit(udev_device->sysname[--len])) | |
439 | udev_device->sysnum = &udev_device->sysname[len]; | |
440 | ||
441 | /* sysname is completely numeric */ | |
442 | if (len == 0) | |
443 | udev_device->sysnum = NULL; | |
444 | ||
445 | return 0; | |
446 | } | |
447 | ||
fc8d61c5 KS |
448 | /* |
449 | * parse property string, and if needed, update internal values accordingly | |
450 | * | |
451 | * udev_device_add_property_from_string_parse_finish() needs to be | |
452 | * called after adding properties, and its return value checked | |
453 | * | |
454 | * udev_device_set_info_loaded() needs to be set, to avoid trying | |
455 | * to use a device without a DEVPATH set | |
456 | */ | |
bd57b6de | 457 | static void udev_device_add_property_from_string_parse(struct udev_device *udev_device, const char *property) |
fc8d61c5 | 458 | { |
33502ffe | 459 | if (startswith(property, "DEVPATH=")) { |
912541b0 KS |
460 | char path[UTIL_PATH_SIZE]; |
461 | ||
d5a89d7d | 462 | strscpyl(path, sizeof(path), "/sys", &property[8], NULL); |
912541b0 | 463 | udev_device_set_syspath(udev_device, path); |
33502ffe | 464 | } else if (startswith(property, "SUBSYSTEM=")) { |
912541b0 | 465 | udev_device_set_subsystem(udev_device, &property[10]); |
33502ffe | 466 | } else if (startswith(property, "DEVTYPE=")) { |
912541b0 | 467 | udev_device_set_devtype(udev_device, &property[8]); |
33502ffe | 468 | } else if (startswith(property, "DEVNAME=")) { |
912541b0 | 469 | udev_device_set_devnode(udev_device, &property[8]); |
33502ffe | 470 | } else if (startswith(property, "DEVLINKS=")) { |
912541b0 KS |
471 | char devlinks[UTIL_PATH_SIZE]; |
472 | char *slink; | |
473 | char *next; | |
474 | ||
d5a89d7d | 475 | strscpy(devlinks, sizeof(devlinks), &property[9]); |
912541b0 KS |
476 | slink = devlinks; |
477 | next = strchr(slink, ' '); | |
478 | while (next != NULL) { | |
479 | next[0] = '\0'; | |
8a173387 | 480 | udev_device_add_devlink(udev_device, slink); |
912541b0 KS |
481 | slink = &next[1]; |
482 | next = strchr(slink, ' '); | |
483 | } | |
484 | if (slink[0] != '\0') | |
8a173387 | 485 | udev_device_add_devlink(udev_device, slink); |
33502ffe | 486 | } else if (startswith(property, "TAGS=")) { |
912541b0 KS |
487 | char tags[UTIL_PATH_SIZE]; |
488 | char *next; | |
489 | ||
d5a89d7d | 490 | strscpy(tags, sizeof(tags), &property[5]); |
912541b0 KS |
491 | next = strchr(tags, ':'); |
492 | if (next != NULL) { | |
493 | next++; | |
494 | while (next[0] != '\0') { | |
495 | char *tag; | |
496 | ||
497 | tag = next; | |
498 | next = strchr(tag, ':'); | |
499 | if (next == NULL) | |
500 | break; | |
501 | next[0] = '\0'; | |
502 | next++; | |
503 | udev_device_add_tag(udev_device, tag); | |
504 | } | |
505 | } | |
33502ffe | 506 | } else if (startswith(property, "USEC_INITIALIZED=")) { |
912541b0 | 507 | udev_device_set_usec_initialized(udev_device, strtoull(&property[19], NULL, 10)); |
33502ffe | 508 | } else if (startswith(property, "DRIVER=")) { |
912541b0 | 509 | udev_device_set_driver(udev_device, &property[7]); |
33502ffe | 510 | } else if (startswith(property, "ACTION=")) { |
912541b0 | 511 | udev_device_set_action(udev_device, &property[7]); |
33502ffe | 512 | } else if (startswith(property, "MAJOR=")) { |
912541b0 | 513 | udev_device->maj = strtoull(&property[6], NULL, 10); |
33502ffe | 514 | } else if (startswith(property, "MINOR=")) { |
912541b0 | 515 | udev_device->min = strtoull(&property[6], NULL, 10); |
33502ffe | 516 | } else if (startswith(property, "DEVPATH_OLD=")) { |
912541b0 | 517 | udev_device_set_devpath_old(udev_device, &property[12]); |
33502ffe | 518 | } else if (startswith(property, "SEQNUM=")) { |
912541b0 | 519 | udev_device_set_seqnum(udev_device, strtoull(&property[7], NULL, 10)); |
33502ffe | 520 | } else if (startswith(property, "IFINDEX=")) { |
912541b0 | 521 | udev_device_set_ifindex(udev_device, strtoull(&property[8], NULL, 10)); |
33502ffe | 522 | } else if (startswith(property, "DEVMODE=")) { |
912541b0 | 523 | udev_device_set_devnode_mode(udev_device, strtoul(&property[8], NULL, 8)); |
1edefa4f KS |
524 | } else if (startswith(property, "DEVUID=")) { |
525 | udev_device_set_devnode_uid(udev_device, strtoul(&property[7], NULL, 10)); | |
526 | } else if (startswith(property, "DEVGID=")) { | |
527 | udev_device_set_devnode_gid(udev_device, strtoul(&property[7], NULL, 10)); | |
912541b0 KS |
528 | } else { |
529 | udev_device_add_property_from_string(udev_device, property); | |
530 | } | |
fc8d61c5 KS |
531 | } |
532 | ||
bd57b6de | 533 | static int udev_device_add_property_from_string_parse_finish(struct udev_device *udev_device) |
fc8d61c5 | 534 | { |
912541b0 KS |
535 | if (udev_device->maj > 0) |
536 | udev_device_set_devnum(udev_device, makedev(udev_device->maj, udev_device->min)); | |
537 | udev_device->maj = 0; | |
538 | udev_device->min = 0; | |
fc8d61c5 | 539 | |
912541b0 KS |
540 | if (udev_device->devpath == NULL || udev_device->subsystem == NULL) |
541 | return -EINVAL; | |
542 | return 0; | |
fc8d61c5 KS |
543 | } |
544 | ||
545 | /** | |
546 | * udev_device_get_property_value: | |
547 | * @udev_device: udev device | |
548 | * @key: property name | |
549 | * | |
21dbe43a KS |
550 | * Get the value of a given property. |
551 | * | |
552 | * Returns: the property string, or #NULL if there is no such property. | |
fc8d61c5 | 553 | **/ |
54cf0b7f | 554 | _public_ const char *udev_device_get_property_value(struct udev_device *udev_device, const char *key) |
fc8d61c5 | 555 | { |
912541b0 | 556 | struct udev_list_entry *list_entry; |
fc8d61c5 | 557 | |
912541b0 KS |
558 | if (udev_device == NULL) |
559 | return NULL; | |
560 | if (key == NULL) | |
561 | return NULL; | |
fc8d61c5 | 562 | |
912541b0 KS |
563 | list_entry = udev_device_get_properties_list_entry(udev_device); |
564 | list_entry = udev_list_entry_get_by_name(list_entry, key); | |
565 | return udev_list_entry_get_value(list_entry); | |
fc8d61c5 KS |
566 | } |
567 | ||
570b83cc | 568 | int udev_device_read_db(struct udev_device *udev_device) |
e88a82b5 | 569 | { |
912541b0 KS |
570 | char filename[UTIL_PATH_SIZE]; |
571 | char line[UTIL_LINE_SIZE]; | |
570b83cc | 572 | const char *id; |
912541b0 KS |
573 | FILE *f; |
574 | ||
570b83cc TG |
575 | if (udev_device->db_loaded) |
576 | return 0; | |
912541b0 | 577 | |
570b83cc | 578 | udev_device->db_loaded = true; |
912541b0 | 579 | |
570b83cc TG |
580 | id = udev_device_get_id_filename(udev_device); |
581 | if (id == NULL) | |
582 | return -1; | |
912541b0 | 583 | |
570b83cc TG |
584 | strscpyl(filename, sizeof(filename), "/run/udev/data/", id, NULL); |
585 | ||
586 | f = fopen(filename, "re"); | |
4a62c710 | 587 | if (f == NULL) |
570b83cc | 588 | return log_debug_errno(errno, "no db file to read %s: %m", filename); |
f6613dd9 KS |
589 | |
590 | /* devices with a database entry are initialized */ | |
912541b0 KS |
591 | udev_device->is_initialized = true; |
592 | ||
593 | while (fgets(line, sizeof(line), f)) { | |
594 | ssize_t len; | |
595 | const char *val; | |
596 | struct udev_list_entry *entry; | |
597 | ||
598 | len = strlen(line); | |
599 | if (len < 4) | |
600 | break; | |
601 | line[len-1] = '\0'; | |
602 | val = &line[2]; | |
603 | switch(line[0]) { | |
604 | case 'S': | |
d5a89d7d | 605 | strscpyl(filename, sizeof(filename), "/dev/", val, NULL); |
8a173387 | 606 | udev_device_add_devlink(udev_device, filename); |
912541b0 KS |
607 | break; |
608 | case 'L': | |
609 | udev_device_set_devlink_priority(udev_device, atoi(val)); | |
610 | break; | |
611 | case 'E': | |
612 | entry = udev_device_add_property_from_string(udev_device, val); | |
613 | udev_list_entry_set_num(entry, true); | |
614 | break; | |
615 | case 'G': | |
616 | udev_device_add_tag(udev_device, val); | |
617 | break; | |
618 | case 'W': | |
619 | udev_device_set_watch_handle(udev_device, atoi(val)); | |
620 | break; | |
621 | case 'I': | |
622 | udev_device_set_usec_initialized(udev_device, strtoull(val, NULL, 10)); | |
623 | break; | |
624 | } | |
625 | } | |
626 | fclose(f); | |
627 | ||
ff49bc32 | 628 | log_debug("device %p filled with db file data", udev_device); |
912541b0 | 629 | return 0; |
e88a82b5 KS |
630 | } |
631 | ||
bd85566c | 632 | int udev_device_read_uevent_file(struct udev_device *udev_device) |
99214844 | 633 | { |
912541b0 KS |
634 | char filename[UTIL_PATH_SIZE]; |
635 | FILE *f; | |
636 | char line[UTIL_LINE_SIZE]; | |
637 | int maj = 0; | |
638 | int min = 0; | |
639 | ||
640 | if (udev_device->uevent_loaded) | |
641 | return 0; | |
642 | ||
d5a89d7d | 643 | strscpyl(filename, sizeof(filename), udev_device->syspath, "/uevent", NULL); |
912541b0 KS |
644 | f = fopen(filename, "re"); |
645 | if (f == NULL) | |
994e0234 | 646 | return -errno; |
912541b0 KS |
647 | udev_device->uevent_loaded = true; |
648 | ||
649 | while (fgets(line, sizeof(line), f)) { | |
650 | char *pos; | |
651 | ||
652 | pos = strchr(line, '\n'); | |
653 | if (pos == NULL) | |
654 | continue; | |
655 | pos[0] = '\0'; | |
656 | ||
33502ffe | 657 | if (startswith(line, "DEVTYPE=")) { |
912541b0 | 658 | udev_device_set_devtype(udev_device, &line[8]); |
d2b795f2 KS |
659 | continue; |
660 | } | |
33502ffe | 661 | if (startswith(line, "IFINDEX=")) { |
d2b795f2 KS |
662 | udev_device_set_ifindex(udev_device, strtoull(&line[8], NULL, 10)); |
663 | continue; | |
664 | } | |
33502ffe | 665 | if (startswith(line, "DEVNAME=")) { |
d2b795f2 KS |
666 | udev_device_set_devnode(udev_device, &line[8]); |
667 | continue; | |
668 | } | |
669 | ||
33502ffe | 670 | if (startswith(line, "MAJOR=")) |
912541b0 | 671 | maj = strtoull(&line[6], NULL, 10); |
33502ffe | 672 | else if (startswith(line, "MINOR=")) |
912541b0 | 673 | min = strtoull(&line[6], NULL, 10); |
33502ffe | 674 | else if (startswith(line, "DEVMODE=")) |
912541b0 KS |
675 | udev_device->devnode_mode = strtoul(&line[8], NULL, 8); |
676 | ||
677 | udev_device_add_property_from_string(udev_device, line); | |
678 | } | |
679 | ||
680 | udev_device->devnum = makedev(maj, min); | |
681 | fclose(f); | |
682 | return 0; | |
99214844 KS |
683 | } |
684 | ||
8cd2e972 | 685 | void udev_device_set_info_loaded(struct udev_device *device) |
99214844 | 686 | { |
912541b0 | 687 | device->info_loaded = true; |
99214844 KS |
688 | } |
689 | ||
71ef8b3a | 690 | static struct udev_device *udev_device_new(struct udev *udev) |
eb1f0e66 | 691 | { |
912541b0 | 692 | struct udev_device *udev_device; |
912541b0 | 693 | |
aa0e72ea TG |
694 | if (udev == NULL) { |
695 | errno = EINVAL; | |
912541b0 | 696 | return NULL; |
aa0e72ea | 697 | } |
912541b0 | 698 | |
955d98c9 | 699 | udev_device = new0(struct udev_device, 1); |
aa0e72ea TG |
700 | if (udev_device == NULL) { |
701 | errno = ENOMEM; | |
912541b0 | 702 | return NULL; |
aa0e72ea | 703 | } |
912541b0 KS |
704 | udev_device->refcount = 1; |
705 | udev_device->udev = udev; | |
706 | udev_list_init(udev, &udev_device->devlinks_list, true); | |
707 | udev_list_init(udev, &udev_device->properties_list, true); | |
708 | udev_list_init(udev, &udev_device->sysattr_value_list, true); | |
709 | udev_list_init(udev, &udev_device->sysattr_list, false); | |
710 | udev_list_init(udev, &udev_device->tags_list, true); | |
711 | udev_device->watch_handle = -1; | |
41b848b0 | 712 | |
912541b0 | 713 | return udev_device; |
eb1f0e66 KS |
714 | } |
715 | ||
716 | /** | |
8753fadf | 717 | * udev_device_new_from_syspath: |
eb1f0e66 | 718 | * @udev: udev library context |
8753fadf | 719 | * @syspath: sys device path including sys directory |
eb1f0e66 | 720 | * |
8753fadf | 721 | * Create new udev device, and fill in information from the sys |
214a6c79 | 722 | * device and the udev database entry. The syspath is the absolute |
8753fadf | 723 | * path to the device, including the sys mount point. |
eb1f0e66 KS |
724 | * |
725 | * The initial refcount is 1, and needs to be decremented to | |
be7de409 | 726 | * release the resources of the udev device. |
eb1f0e66 KS |
727 | * |
728 | * Returns: a new udev device, or #NULL, if it does not exist | |
729 | **/ | |
54cf0b7f | 730 | _public_ struct udev_device *udev_device_new_from_syspath(struct udev *udev, const char *syspath) |
eb1f0e66 | 731 | { |
912541b0 KS |
732 | const char *subdir; |
733 | char path[UTIL_PATH_SIZE]; | |
734 | char *pos; | |
735 | struct stat statbuf; | |
736 | struct udev_device *udev_device; | |
737 | ||
aa0e72ea TG |
738 | if (udev == NULL) { |
739 | errno = EINVAL; | |
912541b0 | 740 | return NULL; |
aa0e72ea TG |
741 | } |
742 | ||
743 | if (syspath == NULL) { | |
744 | errno = EINVAL; | |
912541b0 | 745 | return NULL; |
aa0e72ea | 746 | } |
912541b0 KS |
747 | |
748 | /* path starts in sys */ | |
4cb72937 | 749 | if (!startswith(syspath, "/sys")) { |
ff49bc32 | 750 | log_debug("not in sys :%s", syspath); |
aa0e72ea | 751 | errno = EINVAL; |
912541b0 KS |
752 | return NULL; |
753 | } | |
754 | ||
755 | /* path is not a root directory */ | |
4cb72937 | 756 | subdir = syspath + strlen("/sys"); |
912541b0 | 757 | pos = strrchr(subdir, '/'); |
aa0e72ea TG |
758 | if (pos == NULL || pos[1] == '\0' || pos < &subdir[2]) { |
759 | errno = EINVAL; | |
912541b0 | 760 | return NULL; |
aa0e72ea | 761 | } |
912541b0 KS |
762 | |
763 | /* resolve possible symlink to real path */ | |
d5a89d7d | 764 | strscpy(path, sizeof(path), syspath); |
912541b0 KS |
765 | util_resolve_sys_link(udev, path, sizeof(path)); |
766 | ||
4cb72937 | 767 | if (startswith(path + strlen("/sys"), "/devices/")) { |
912541b0 KS |
768 | char file[UTIL_PATH_SIZE]; |
769 | ||
770 | /* all "devices" require a "uevent" file */ | |
d5a89d7d | 771 | strscpyl(file, sizeof(file), path, "/uevent", NULL); |
baa30fbc | 772 | if (stat(file, &statbuf) != 0) |
912541b0 | 773 | return NULL; |
912541b0 KS |
774 | } else { |
775 | /* everything else just needs to be a directory */ | |
154e6f23 | 776 | if (stat(path, &statbuf) != 0) |
912541b0 | 777 | return NULL; |
154e6f23 LP |
778 | |
779 | if (!S_ISDIR(statbuf.st_mode)) { | |
780 | errno = EISDIR; | |
781 | return NULL; | |
782 | } | |
912541b0 KS |
783 | } |
784 | ||
785 | udev_device = udev_device_new(udev); | |
786 | if (udev_device == NULL) | |
787 | return NULL; | |
788 | ||
789 | udev_device_set_syspath(udev_device, path); | |
ff49bc32 | 790 | log_debug("device %p has devpath '%s'", udev_device, udev_device_get_devpath(udev_device)); |
912541b0 KS |
791 | |
792 | return udev_device; | |
eb1f0e66 KS |
793 | } |
794 | ||
1e511322 KS |
795 | /** |
796 | * udev_device_new_from_devnum: | |
797 | * @udev: udev library context | |
798 | * @type: char or block device | |
799 | * @devnum: device major/minor number | |
800 | * | |
801 | * Create new udev device, and fill in information from the sys | |
dbba7e40 KS |
802 | * device and the udev database entry. The device is looked-up |
803 | * by its major/minor number and type. Character and block device | |
804 | * numbers are not unique across the two types. | |
1e511322 KS |
805 | * |
806 | * The initial refcount is 1, and needs to be decremented to | |
807 | * release the resources of the udev device. | |
808 | * | |
809 | * Returns: a new udev device, or #NULL, if it does not exist | |
810 | **/ | |
54cf0b7f | 811 | _public_ struct udev_device *udev_device_new_from_devnum(struct udev *udev, char type, dev_t devnum) |
4c9dff47 | 812 | { |
912541b0 KS |
813 | char path[UTIL_PATH_SIZE]; |
814 | const char *type_str; | |
03198b93 | 815 | |
912541b0 KS |
816 | if (type == 'b') |
817 | type_str = "block"; | |
818 | else if (type == 'c') | |
819 | type_str = "char"; | |
aa0e72ea TG |
820 | else { |
821 | errno = EINVAL; | |
912541b0 | 822 | return NULL; |
aa0e72ea | 823 | } |
4c9dff47 | 824 | |
912541b0 | 825 | /* use /sys/dev/{block,char}/<maj>:<min> link */ |
4cb72937 | 826 | snprintf(path, sizeof(path), "/sys/dev/%s/%u:%u", |
6ada823a | 827 | type_str, major(devnum), minor(devnum)); |
912541b0 | 828 | return udev_device_new_from_syspath(udev, path); |
4c9dff47 KS |
829 | } |
830 | ||
dbf61afb KS |
831 | /** |
832 | * udev_device_new_from_device_id: | |
833 | * @udev: udev library context | |
834 | * @id: text string identifying a kernel device | |
835 | * | |
836 | * Create new udev device, and fill in information from the sys | |
837 | * device and the udev database entry. The device is looked-up | |
838 | * by a special string: | |
839 | * b8:2 - block device major:minor | |
840 | * c128:1 - char device major:minor | |
841 | * n3 - network device ifindex | |
842 | * +sound:card29 - kernel driver core subsystem:device name | |
843 | * | |
844 | * The initial refcount is 1, and needs to be decremented to | |
845 | * release the resources of the udev device. | |
846 | * | |
847 | * Returns: a new udev device, or #NULL, if it does not exist | |
848 | **/ | |
67410e9f | 849 | _public_ struct udev_device *udev_device_new_from_device_id(struct udev *udev, const char *id) |
cad40a5f | 850 | { |
912541b0 KS |
851 | char type; |
852 | int maj, min; | |
853 | char subsys[UTIL_PATH_SIZE]; | |
854 | char *sysname; | |
855 | ||
856 | switch(id[0]) { | |
857 | case 'b': | |
858 | case 'c': | |
859 | if (sscanf(id, "%c%i:%i", &type, &maj, &min) != 3) | |
860 | return NULL; | |
861 | return udev_device_new_from_devnum(udev, type, makedev(maj, min)); | |
862 | case 'n': { | |
863 | int sk; | |
864 | struct ifreq ifr; | |
865 | struct udev_device *dev; | |
866 | int ifindex; | |
867 | ||
868 | ifindex = strtoul(&id[1], NULL, 10); | |
aa0e72ea TG |
869 | if (ifindex <= 0) { |
870 | errno = EINVAL; | |
912541b0 | 871 | return NULL; |
aa0e72ea | 872 | } |
912541b0 KS |
873 | |
874 | sk = socket(PF_INET, SOCK_DGRAM, 0); | |
875 | if (sk < 0) | |
876 | return NULL; | |
29804cc1 | 877 | memzero(&ifr, sizeof(struct ifreq)); |
912541b0 KS |
878 | ifr.ifr_ifindex = ifindex; |
879 | if (ioctl(sk, SIOCGIFNAME, &ifr) != 0) { | |
880 | close(sk); | |
881 | return NULL; | |
882 | } | |
883 | close(sk); | |
884 | ||
885 | dev = udev_device_new_from_subsystem_sysname(udev, "net", ifr.ifr_name); | |
886 | if (dev == NULL) | |
887 | return NULL; | |
888 | if (udev_device_get_ifindex(dev) == ifindex) | |
889 | return dev; | |
aa0e72ea TG |
890 | |
891 | /* this is racy, so we may end up with the wrong device */ | |
912541b0 | 892 | udev_device_unref(dev); |
aa0e72ea | 893 | errno = ENODEV; |
912541b0 KS |
894 | return NULL; |
895 | } | |
896 | case '+': | |
d5a89d7d | 897 | strscpy(subsys, sizeof(subsys), &id[1]); |
912541b0 | 898 | sysname = strchr(subsys, ':'); |
aa0e72ea TG |
899 | if (sysname == NULL) { |
900 | errno = EINVAL; | |
912541b0 | 901 | return NULL; |
aa0e72ea | 902 | } |
912541b0 KS |
903 | sysname[0] = '\0'; |
904 | sysname = &sysname[1]; | |
905 | return udev_device_new_from_subsystem_sysname(udev, subsys, sysname); | |
906 | default: | |
aa0e72ea | 907 | errno = EINVAL; |
912541b0 KS |
908 | return NULL; |
909 | } | |
cad40a5f KS |
910 | } |
911 | ||
1e511322 KS |
912 | /** |
913 | * udev_device_new_from_subsystem_sysname: | |
914 | * @udev: udev library context | |
214a6c79 | 915 | * @subsystem: the subsystem of the device |
1e511322 KS |
916 | * @sysname: the name of the device |
917 | * | |
dbba7e40 KS |
918 | * Create new udev device, and fill in information from the sys device |
919 | * and the udev database entry. The device is looked up by the subsystem | |
920 | * and name string of the device, like "mem" / "zero", or "block" / "sda". | |
1e511322 KS |
921 | * |
922 | * The initial refcount is 1, and needs to be decremented to | |
923 | * release the resources of the udev device. | |
924 | * | |
925 | * Returns: a new udev device, or #NULL, if it does not exist | |
926 | **/ | |
54cf0b7f | 927 | _public_ struct udev_device *udev_device_new_from_subsystem_sysname(struct udev *udev, const char *subsystem, const char *sysname) |
90d80c2e | 928 | { |
6ada823a | 929 | char path[UTIL_PATH_SIZE]; |
912541b0 KS |
930 | struct stat statbuf; |
931 | ||
33502ffe | 932 | if (streq(subsystem, "subsystem")) { |
d5a89d7d | 933 | strscpyl(path, sizeof(path), "/sys/subsystem/", sysname, NULL); |
6ada823a | 934 | if (stat(path, &statbuf) == 0) |
912541b0 KS |
935 | goto found; |
936 | ||
d5a89d7d | 937 | strscpyl(path, sizeof(path), "/sys/bus/", sysname, NULL); |
6ada823a | 938 | if (stat(path, &statbuf) == 0) |
912541b0 KS |
939 | goto found; |
940 | ||
d5a89d7d | 941 | strscpyl(path, sizeof(path), "/sys/class/", sysname, NULL); |
6ada823a | 942 | if (stat(path, &statbuf) == 0) |
912541b0 KS |
943 | goto found; |
944 | goto out; | |
945 | } | |
946 | ||
33502ffe | 947 | if (streq(subsystem, "module")) { |
d5a89d7d | 948 | strscpyl(path, sizeof(path), "/sys/module/", sysname, NULL); |
6ada823a | 949 | if (stat(path, &statbuf) == 0) |
912541b0 KS |
950 | goto found; |
951 | goto out; | |
952 | } | |
953 | ||
33502ffe | 954 | if (streq(subsystem, "drivers")) { |
912541b0 KS |
955 | char subsys[UTIL_NAME_SIZE]; |
956 | char *driver; | |
957 | ||
d5a89d7d | 958 | strscpy(subsys, sizeof(subsys), sysname); |
912541b0 KS |
959 | driver = strchr(subsys, ':'); |
960 | if (driver != NULL) { | |
961 | driver[0] = '\0'; | |
962 | driver = &driver[1]; | |
963 | ||
d5a89d7d | 964 | strscpyl(path, sizeof(path), "/sys/subsystem/", subsys, "/drivers/", driver, NULL); |
6ada823a | 965 | if (stat(path, &statbuf) == 0) |
912541b0 KS |
966 | goto found; |
967 | ||
d5a89d7d | 968 | strscpyl(path, sizeof(path), "/sys/bus/", subsys, "/drivers/", driver, NULL); |
6ada823a | 969 | if (stat(path, &statbuf) == 0) |
912541b0 | 970 | goto found; |
aa0e72ea TG |
971 | } else |
972 | errno = EINVAL; | |
973 | ||
912541b0 KS |
974 | goto out; |
975 | } | |
976 | ||
d5a89d7d | 977 | strscpyl(path, sizeof(path), "/sys/subsystem/", subsystem, "/devices/", sysname, NULL); |
6ada823a | 978 | if (stat(path, &statbuf) == 0) |
912541b0 KS |
979 | goto found; |
980 | ||
d5a89d7d | 981 | strscpyl(path, sizeof(path), "/sys/bus/", subsystem, "/devices/", sysname, NULL); |
6ada823a | 982 | if (stat(path, &statbuf) == 0) |
912541b0 KS |
983 | goto found; |
984 | ||
d5a89d7d | 985 | strscpyl(path, sizeof(path), "/sys/class/", subsystem, "/", sysname, NULL); |
6ada823a | 986 | if (stat(path, &statbuf) == 0) |
912541b0 | 987 | goto found; |
90d80c2e | 988 | out: |
912541b0 | 989 | return NULL; |
90d80c2e | 990 | found: |
6ada823a | 991 | return udev_device_new_from_syspath(udev, path); |
90d80c2e KS |
992 | } |
993 | ||
fc8d61c5 KS |
994 | /** |
995 | * udev_device_new_from_environment | |
996 | * @udev: udev library context | |
997 | * | |
998 | * Create new udev device, and fill in information from the | |
999 | * current process environment. This only works reliable if | |
1000 | * the process is called from a udev rule. It is usually used | |
1001 | * for tools executed from IMPORT= rules. | |
1002 | * | |
1003 | * The initial refcount is 1, and needs to be decremented to | |
1004 | * release the resources of the udev device. | |
1005 | * | |
1006 | * Returns: a new udev device, or #NULL, if it does not exist | |
1007 | **/ | |
54cf0b7f | 1008 | _public_ struct udev_device *udev_device_new_from_environment(struct udev *udev) |
fc8d61c5 | 1009 | { |
912541b0 KS |
1010 | int i; |
1011 | struct udev_device *udev_device; | |
fc8d61c5 | 1012 | |
912541b0 KS |
1013 | udev_device = udev_device_new(udev); |
1014 | if (udev_device == NULL) | |
1015 | return NULL; | |
1016 | udev_device_set_info_loaded(udev_device); | |
fc8d61c5 | 1017 | |
912541b0 KS |
1018 | for (i = 0; environ[i] != NULL; i++) |
1019 | udev_device_add_property_from_string_parse(udev_device, environ[i]); | |
fc8d61c5 | 1020 | |
912541b0 | 1021 | if (udev_device_add_property_from_string_parse_finish(udev_device) < 0) { |
ff49bc32 | 1022 | log_debug("missing values, invalid device"); |
912541b0 KS |
1023 | udev_device_unref(udev_device); |
1024 | udev_device = NULL; | |
1025 | } | |
fc8d61c5 | 1026 | |
912541b0 | 1027 | return udev_device; |
fc8d61c5 KS |
1028 | } |
1029 | ||
b2d9e4f2 | 1030 | static struct udev_device *device_new_from_parent(struct udev_device *udev_device) |
4ad3a37f | 1031 | { |
912541b0 KS |
1032 | struct udev_device *udev_device_parent = NULL; |
1033 | char path[UTIL_PATH_SIZE]; | |
1034 | const char *subdir; | |
4ad3a37f | 1035 | |
d5a89d7d | 1036 | strscpy(path, sizeof(path), udev_device->syspath); |
4cb72937 | 1037 | subdir = path + strlen("/sys/"); |
912541b0 KS |
1038 | for (;;) { |
1039 | char *pos; | |
b95f8a76 | 1040 | |
912541b0 KS |
1041 | pos = strrchr(subdir, '/'); |
1042 | if (pos == NULL || pos < &subdir[2]) | |
1043 | break; | |
1044 | pos[0] = '\0'; | |
1045 | udev_device_parent = udev_device_new_from_syspath(udev_device->udev, path); | |
1046 | if (udev_device_parent != NULL) | |
1047 | return udev_device_parent; | |
1048 | } | |
aa0e72ea TG |
1049 | |
1050 | errno = ENOENT; | |
912541b0 | 1051 | return NULL; |
4ad3a37f KS |
1052 | } |
1053 | ||
1e511322 KS |
1054 | /** |
1055 | * udev_device_get_parent: | |
1056 | * @udev_device: the device to start searching from | |
1057 | * | |
1058 | * Find the next parent device, and fill in information from the sys | |
1059 | * device and the udev database entry. | |
1060 | * | |
572ce4f7 ZJS |
1061 | * Returned device is not referenced. It is attached to the child |
1062 | * device, and will be cleaned up when the child device is cleaned up. | |
1e511322 | 1063 | * |
214a6c79 | 1064 | * It is not necessarily just the upper level directory, empty or not |
1e511322 KS |
1065 | * recognized sys directories are ignored. |
1066 | * | |
1067 | * It can be called as many times as needed, without caring about | |
1068 | * references. | |
1069 | * | |
1070 | * Returns: a new udev device, or #NULL, if it no parent exist. | |
1071 | **/ | |
54cf0b7f | 1072 | _public_ struct udev_device *udev_device_get_parent(struct udev_device *udev_device) |
b2d9e4f2 | 1073 | { |
aa0e72ea TG |
1074 | if (udev_device == NULL) { |
1075 | errno = EINVAL; | |
912541b0 | 1076 | return NULL; |
aa0e72ea | 1077 | } |
912541b0 KS |
1078 | if (!udev_device->parent_set) { |
1079 | udev_device->parent_set = true; | |
1080 | udev_device->parent_device = device_new_from_parent(udev_device); | |
1081 | } | |
912541b0 | 1082 | return udev_device->parent_device; |
b2d9e4f2 KS |
1083 | } |
1084 | ||
1e511322 KS |
1085 | /** |
1086 | * udev_device_get_parent_with_subsystem_devtype: | |
1087 | * @udev_device: udev device to start searching from | |
214a6c79 | 1088 | * @subsystem: the subsystem of the device |
1e511322 KS |
1089 | * @devtype: the type (DEVTYPE) of the device |
1090 | * | |
1091 | * Find the next parent device, with a matching subsystem and devtype | |
1092 | * value, and fill in information from the sys device and the udev | |
1093 | * database entry. | |
1094 | * | |
79ef2e97 | 1095 | * If devtype is #NULL, only subsystem is checked, and any devtype will |
54d4f54e MP |
1096 | * match. |
1097 | * | |
572ce4f7 ZJS |
1098 | * Returned device is not referenced. It is attached to the child |
1099 | * device, and will be cleaned up when the child device is cleaned up. | |
1e511322 KS |
1100 | * |
1101 | * It can be called as many times as needed, without caring about | |
1102 | * references. | |
1103 | * | |
8d6bc73a | 1104 | * Returns: a new udev device, or #NULL if no matching parent exists. |
1e511322 | 1105 | **/ |
54cf0b7f | 1106 | _public_ struct udev_device *udev_device_get_parent_with_subsystem_devtype(struct udev_device *udev_device, const char *subsystem, const char *devtype) |
bf8b2ae1 | 1107 | { |
912541b0 | 1108 | struct udev_device *parent; |
bf8b2ae1 | 1109 | |
aa0e72ea TG |
1110 | if (subsystem == NULL) { |
1111 | errno = EINVAL; | |
912541b0 | 1112 | return NULL; |
aa0e72ea | 1113 | } |
883012d4 | 1114 | |
912541b0 KS |
1115 | parent = udev_device_get_parent(udev_device); |
1116 | while (parent != NULL) { | |
1117 | const char *parent_subsystem; | |
1118 | const char *parent_devtype; | |
bf8b2ae1 | 1119 | |
912541b0 | 1120 | parent_subsystem = udev_device_get_subsystem(parent); |
33502ffe | 1121 | if (parent_subsystem != NULL && streq(parent_subsystem, subsystem)) { |
912541b0 KS |
1122 | if (devtype == NULL) |
1123 | break; | |
1124 | parent_devtype = udev_device_get_devtype(parent); | |
33502ffe | 1125 | if (parent_devtype != NULL && streq(parent_devtype, devtype)) |
912541b0 KS |
1126 | break; |
1127 | } | |
1128 | parent = udev_device_get_parent(parent); | |
1129 | } | |
aa0e72ea TG |
1130 | |
1131 | if (!parent) | |
1132 | errno = ENOENT; | |
1133 | ||
912541b0 | 1134 | return parent; |
bf8b2ae1 MH |
1135 | } |
1136 | ||
eb1f0e66 KS |
1137 | /** |
1138 | * udev_device_get_udev: | |
7d8787b3 | 1139 | * @udev_device: udev device |
eb1f0e66 KS |
1140 | * |
1141 | * Retrieve the udev library context the device was created with. | |
1142 | * | |
1143 | * Returns: the udev library context | |
1144 | **/ | |
54cf0b7f | 1145 | _public_ struct udev *udev_device_get_udev(struct udev_device *udev_device) |
eb1f0e66 | 1146 | { |
912541b0 KS |
1147 | if (udev_device == NULL) |
1148 | return NULL; | |
1149 | return udev_device->udev; | |
eb1f0e66 KS |
1150 | } |
1151 | ||
1152 | /** | |
1153 | * udev_device_ref: | |
1154 | * @udev_device: udev device | |
1155 | * | |
1156 | * Take a reference of a udev device. | |
1157 | * | |
1158 | * Returns: the passed udev device | |
1159 | **/ | |
54cf0b7f | 1160 | _public_ struct udev_device *udev_device_ref(struct udev_device *udev_device) |
eb1f0e66 | 1161 | { |
912541b0 KS |
1162 | if (udev_device == NULL) |
1163 | return NULL; | |
1164 | udev_device->refcount++; | |
1165 | return udev_device; | |
eb1f0e66 KS |
1166 | } |
1167 | ||
1168 | /** | |
1169 | * udev_device_unref: | |
1170 | * @udev_device: udev device | |
1171 | * | |
1172 | * Drop a reference of a udev device. If the refcount reaches zero, | |
be7de409 | 1173 | * the resources of the device will be released. |
eb1f0e66 | 1174 | * |
725d7e6c | 1175 | * Returns: #NULL |
eb1f0e66 | 1176 | **/ |
20bbd54f | 1177 | _public_ struct udev_device *udev_device_unref(struct udev_device *udev_device) |
eb1f0e66 | 1178 | { |
912541b0 | 1179 | if (udev_device == NULL) |
20bbd54f | 1180 | return NULL; |
912541b0 KS |
1181 | udev_device->refcount--; |
1182 | if (udev_device->refcount > 0) | |
725d7e6c | 1183 | return NULL; |
912541b0 KS |
1184 | if (udev_device->parent_device != NULL) |
1185 | udev_device_unref(udev_device->parent_device); | |
1186 | free(udev_device->syspath); | |
1187 | free(udev_device->sysname); | |
1188 | free(udev_device->devnode); | |
1189 | free(udev_device->subsystem); | |
1190 | free(udev_device->devtype); | |
1191 | udev_list_cleanup(&udev_device->devlinks_list); | |
1192 | udev_list_cleanup(&udev_device->properties_list); | |
1193 | udev_list_cleanup(&udev_device->sysattr_value_list); | |
1194 | udev_list_cleanup(&udev_device->sysattr_list); | |
1195 | udev_list_cleanup(&udev_device->tags_list); | |
1196 | free(udev_device->action); | |
1197 | free(udev_device->driver); | |
1198 | free(udev_device->devpath_old); | |
1199 | free(udev_device->id_filename); | |
1200 | free(udev_device->envp); | |
1201 | free(udev_device->monitor_buf); | |
912541b0 | 1202 | free(udev_device); |
20bbd54f | 1203 | return NULL; |
eb1f0e66 KS |
1204 | } |
1205 | ||
1206 | /** | |
1207 | * udev_device_get_devpath: | |
1208 | * @udev_device: udev device | |
1209 | * | |
11d543c1 KS |
1210 | * Retrieve the kernel devpath value of the udev device. The path |
1211 | * does not contain the sys mount point, and starts with a '/'. | |
eb1f0e66 | 1212 | * |
11d543c1 | 1213 | * Returns: the devpath of the udev device |
eb1f0e66 | 1214 | **/ |
54cf0b7f | 1215 | _public_ const char *udev_device_get_devpath(struct udev_device *udev_device) |
eb1f0e66 | 1216 | { |
912541b0 KS |
1217 | if (udev_device == NULL) |
1218 | return NULL; | |
1219 | return udev_device->devpath; | |
eb1f0e66 KS |
1220 | } |
1221 | ||
11d543c1 KS |
1222 | /** |
1223 | * udev_device_get_syspath: | |
1224 | * @udev_device: udev device | |
1225 | * | |
1226 | * Retrieve the sys path of the udev device. The path is an | |
1227 | * absolute path and starts with the sys mount point. | |
1228 | * | |
1229 | * Returns: the sys path of the udev device | |
1230 | **/ | |
54cf0b7f | 1231 | _public_ const char *udev_device_get_syspath(struct udev_device *udev_device) |
11d543c1 | 1232 | { |
912541b0 KS |
1233 | if (udev_device == NULL) |
1234 | return NULL; | |
1235 | return udev_device->syspath; | |
11d543c1 KS |
1236 | } |
1237 | ||
1e511322 KS |
1238 | /** |
1239 | * udev_device_get_sysname: | |
1240 | * @udev_device: udev device | |
1241 | * | |
21dbe43a KS |
1242 | * Get the kernel device name in /sys. |
1243 | * | |
1244 | * Returns: the name string of the device device | |
1e511322 | 1245 | **/ |
54cf0b7f | 1246 | _public_ const char *udev_device_get_sysname(struct udev_device *udev_device) |
4ad3a37f | 1247 | { |
912541b0 KS |
1248 | if (udev_device == NULL) |
1249 | return NULL; | |
1250 | return udev_device->sysname; | |
4ad3a37f KS |
1251 | } |
1252 | ||
1e511322 KS |
1253 | /** |
1254 | * udev_device_get_sysnum: | |
1255 | * @udev_device: udev device | |
1256 | * | |
21dbe43a KS |
1257 | * Get the instance number of the device. |
1258 | * | |
c5315881 | 1259 | * Returns: the trailing number string of the device name |
1e511322 | 1260 | **/ |
54cf0b7f | 1261 | _public_ const char *udev_device_get_sysnum(struct udev_device *udev_device) |
517814e7 | 1262 | { |
912541b0 KS |
1263 | if (udev_device == NULL) |
1264 | return NULL; | |
1265 | return udev_device->sysnum; | |
517814e7 KS |
1266 | } |
1267 | ||
eb1f0e66 | 1268 | /** |
fb762bb9 | 1269 | * udev_device_get_devnode: |
eb1f0e66 KS |
1270 | * @udev_device: udev device |
1271 | * | |
1272 | * Retrieve the device node file name belonging to the udev device. | |
ba6929f6 | 1273 | * The path is an absolute path, and starts with the device directory. |
eb1f0e66 KS |
1274 | * |
1275 | * Returns: the device node file name of the udev device, or #NULL if no device node exists | |
1276 | **/ | |
54cf0b7f | 1277 | _public_ const char *udev_device_get_devnode(struct udev_device *udev_device) |
eb1f0e66 | 1278 | { |
912541b0 KS |
1279 | if (udev_device == NULL) |
1280 | return NULL; | |
1281 | if (udev_device->devnode != NULL) | |
1282 | return udev_device->devnode; | |
1283 | if (!udev_device->info_loaded) | |
1284 | udev_device_read_uevent_file(udev_device); | |
1285 | return udev_device->devnode; | |
eb1f0e66 KS |
1286 | } |
1287 | ||
eb1f0e66 | 1288 | /** |
0de33a61 | 1289 | * udev_device_get_devlinks_list_entry: |
eb1f0e66 | 1290 | * @udev_device: udev device |
eb1f0e66 | 1291 | * |
bf7ad0ea KS |
1292 | * Retrieve the list of device links pointing to the device file of |
1293 | * the udev device. The next list entry can be retrieved with | |
bb061708 | 1294 | * udev_list_entry_get_next(), which returns #NULL if no more entries exist. |
bf7ad0ea | 1295 | * The devlink path can be retrieved from the list entry by |
e345e267 | 1296 | * udev_list_entry_get_name(). The path is an absolute path, and starts with |
bf7ad0ea | 1297 | * the device directory. |
eb1f0e66 | 1298 | * |
bf7ad0ea | 1299 | * Returns: the first entry of the device node link list |
eb1f0e66 | 1300 | **/ |
54cf0b7f | 1301 | _public_ struct udev_list_entry *udev_device_get_devlinks_list_entry(struct udev_device *udev_device) |
eb1f0e66 | 1302 | { |
912541b0 KS |
1303 | if (udev_device == NULL) |
1304 | return NULL; | |
1305 | if (!udev_device->info_loaded) | |
570b83cc | 1306 | udev_device_read_db(udev_device); |
912541b0 | 1307 | return udev_list_get_entry(&udev_device->devlinks_list); |
eb1f0e66 KS |
1308 | } |
1309 | ||
979ff016 KS |
1310 | void udev_device_cleanup_devlinks_list(struct udev_device *udev_device) |
1311 | { | |
912541b0 KS |
1312 | udev_device->devlinks_uptodate = false; |
1313 | udev_list_cleanup(&udev_device->devlinks_list); | |
979ff016 KS |
1314 | } |
1315 | ||
eb1f0e66 | 1316 | /** |
0de33a61 | 1317 | * udev_device_get_properties_list_entry: |
eb1f0e66 | 1318 | * @udev_device: udev device |
eb1f0e66 | 1319 | * |
bf7ad0ea | 1320 | * Retrieve the list of key/value device properties of the udev |
bb061708 | 1321 | * device. The next list entry can be retrieved with udev_list_entry_get_next(), |
bf7ad0ea | 1322 | * which returns #NULL if no more entries exist. The property name |
bb061708 KS |
1323 | * can be retrieved from the list entry by udev_list_entry_get_name(), |
1324 | * the property value by udev_list_entry_get_value(). | |
eb1f0e66 | 1325 | * |
bf7ad0ea | 1326 | * Returns: the first entry of the property list |
eb1f0e66 | 1327 | **/ |
54cf0b7f | 1328 | _public_ struct udev_list_entry *udev_device_get_properties_list_entry(struct udev_device *udev_device) |
eb1f0e66 | 1329 | { |
912541b0 KS |
1330 | if (udev_device == NULL) |
1331 | return NULL; | |
1332 | if (!udev_device->info_loaded) { | |
1333 | udev_device_read_uevent_file(udev_device); | |
570b83cc | 1334 | udev_device_read_db(udev_device); |
912541b0 KS |
1335 | } |
1336 | if (!udev_device->devlinks_uptodate) { | |
1337 | char symlinks[UTIL_PATH_SIZE]; | |
1338 | struct udev_list_entry *list_entry; | |
1339 | ||
1340 | udev_device->devlinks_uptodate = true; | |
1341 | list_entry = udev_device_get_devlinks_list_entry(udev_device); | |
1342 | if (list_entry != NULL) { | |
1343 | char *s; | |
1344 | size_t l; | |
1345 | ||
1346 | s = symlinks; | |
d5a89d7d | 1347 | l = strpcpyl(&s, sizeof(symlinks), udev_list_entry_get_name(list_entry), NULL); |
912541b0 | 1348 | udev_list_entry_foreach(list_entry, udev_list_entry_get_next(list_entry)) |
d5a89d7d | 1349 | l = strpcpyl(&s, l, " ", udev_list_entry_get_name(list_entry), NULL); |
df546eb5 | 1350 | udev_device_add_property_internal(udev_device, "DEVLINKS", symlinks); |
912541b0 KS |
1351 | } |
1352 | } | |
1353 | if (!udev_device->tags_uptodate) { | |
1354 | udev_device->tags_uptodate = true; | |
1355 | if (udev_device_get_tags_list_entry(udev_device) != NULL) { | |
1356 | char tags[UTIL_PATH_SIZE]; | |
1357 | struct udev_list_entry *list_entry; | |
1358 | char *s; | |
1359 | size_t l; | |
1360 | ||
1361 | s = tags; | |
d5a89d7d | 1362 | l = strpcpyl(&s, sizeof(tags), ":", NULL); |
912541b0 | 1363 | udev_list_entry_foreach(list_entry, udev_device_get_tags_list_entry(udev_device)) |
d5a89d7d | 1364 | l = strpcpyl(&s, l, udev_list_entry_get_name(list_entry), ":", NULL); |
df546eb5 | 1365 | udev_device_add_property_internal(udev_device, "TAGS", tags); |
912541b0 KS |
1366 | } |
1367 | } | |
1368 | return udev_list_get_entry(&udev_device->properties_list); | |
eb1f0e66 | 1369 | } |
11d543c1 | 1370 | |
1e511322 KS |
1371 | /** |
1372 | * udev_device_get_action: | |
1373 | * @udev_device: udev device | |
1374 | * | |
1375 | * This is only valid if the device was received through a monitor. Devices read from | |
1376 | * sys do not have an action string. Usual actions are: add, remove, change, online, | |
1377 | * offline. | |
1378 | * | |
1379 | * Returns: the kernel action value, or #NULL if there is no action value available. | |
1380 | **/ | |
54cf0b7f | 1381 | _public_ const char *udev_device_get_action(struct udev_device *udev_device) |
c4f5f942 | 1382 | { |
912541b0 KS |
1383 | if (udev_device == NULL) |
1384 | return NULL; | |
1385 | return udev_device->action; | |
c4f5f942 KS |
1386 | } |
1387 | ||
9c6a11b1 KS |
1388 | /** |
1389 | * udev_device_get_usec_since_initialized: | |
1390 | * @udev_device: udev device | |
1391 | * | |
1392 | * Return the number of microseconds passed since udev set up the | |
1393 | * device for the first time. | |
1394 | * | |
1395 | * This is only implemented for devices with need to store properties | |
1396 | * in the udev database. All other devices return 0 here. | |
1397 | * | |
1398 | * Returns: the number of microseconds since the device was first seen. | |
1399 | **/ | |
54cf0b7f | 1400 | _public_ unsigned long long int udev_device_get_usec_since_initialized(struct udev_device *udev_device) |
9c6a11b1 | 1401 | { |
40fe8b11 | 1402 | usec_t now_ts; |
9c6a11b1 | 1403 | |
912541b0 KS |
1404 | if (udev_device == NULL) |
1405 | return 0; | |
1406 | if (!udev_device->info_loaded) | |
570b83cc | 1407 | udev_device_read_db(udev_device); |
912541b0 KS |
1408 | if (udev_device->usec_initialized == 0) |
1409 | return 0; | |
40fe8b11 | 1410 | now_ts = now(CLOCK_MONOTONIC); |
33502ffe | 1411 | if (now_ts == 0) |
912541b0 | 1412 | return 0; |
33502ffe | 1413 | return now_ts - udev_device->usec_initialized; |
9c6a11b1 KS |
1414 | } |
1415 | ||
40fe8b11 | 1416 | usec_t udev_device_get_usec_initialized(struct udev_device *udev_device) |
9c6a11b1 | 1417 | { |
912541b0 | 1418 | return udev_device->usec_initialized; |
9c6a11b1 KS |
1419 | } |
1420 | ||
40fe8b11 | 1421 | void udev_device_set_usec_initialized(struct udev_device *udev_device, usec_t usec_initialized) |
9c6a11b1 | 1422 | { |
912541b0 | 1423 | char num[32]; |
a20a57a7 | 1424 | |
912541b0 | 1425 | udev_device->usec_initialized = usec_initialized; |
de0671ee | 1426 | snprintf(num, sizeof(num), USEC_FMT, usec_initialized); |
df546eb5 | 1427 | udev_device_add_property_internal(udev_device, "USEC_INITIALIZED", num); |
9c6a11b1 KS |
1428 | } |
1429 | ||
1e511322 KS |
1430 | /** |
1431 | * udev_device_get_sysattr_value: | |
1432 | * @udev_device: udev device | |
1433 | * @sysattr: attribute name | |
1434 | * | |
456719b6 | 1435 | * The retrieved value is cached in the device. Repeated calls will return the same |
1e511322 KS |
1436 | * value and not open the attribute again. |
1437 | * | |
1438 | * Returns: the content of a sys attribute file, or #NULL if there is no sys attribute value. | |
1439 | **/ | |
54cf0b7f | 1440 | _public_ const char *udev_device_get_sysattr_value(struct udev_device *udev_device, const char *sysattr) |
93b0f384 | 1441 | { |
912541b0 KS |
1442 | struct udev_list_entry *list_entry; |
1443 | char path[UTIL_PATH_SIZE]; | |
1444 | char value[4096]; | |
1445 | struct stat statbuf; | |
1446 | int fd; | |
1447 | ssize_t size; | |
1448 | const char *val = NULL; | |
1449 | ||
1450 | if (udev_device == NULL) | |
1451 | return NULL; | |
1452 | if (sysattr == NULL) | |
1453 | return NULL; | |
1454 | ||
1455 | /* look for possibly already cached result */ | |
1456 | list_entry = udev_list_get_entry(&udev_device->sysattr_value_list); | |
1457 | list_entry = udev_list_entry_get_by_name(list_entry, sysattr); | |
baa30fbc | 1458 | if (list_entry != NULL) |
912541b0 | 1459 | return udev_list_entry_get_value(list_entry); |
912541b0 | 1460 | |
d5a89d7d | 1461 | strscpyl(path, sizeof(path), udev_device_get_syspath(udev_device), "/", sysattr, NULL); |
912541b0 | 1462 | if (lstat(path, &statbuf) != 0) { |
912541b0 KS |
1463 | udev_list_entry_add(&udev_device->sysattr_value_list, sysattr, NULL); |
1464 | goto out; | |
1465 | } | |
1466 | ||
1467 | if (S_ISLNK(statbuf.st_mode)) { | |
912541b0 KS |
1468 | /* |
1469 | * Some core links return only the last element of the target path, | |
1470 | * these are just values, the paths should not be exposed. | |
1471 | */ | |
33502ffe KS |
1472 | if (streq(sysattr, "driver") || |
1473 | streq(sysattr, "subsystem") || | |
1474 | streq(sysattr, "module")) { | |
912541b0 KS |
1475 | if (util_get_sys_core_link_value(udev_device->udev, sysattr, |
1476 | udev_device->syspath, value, sizeof(value)) < 0) | |
1477 | return NULL; | |
912541b0 KS |
1478 | list_entry = udev_list_entry_add(&udev_device->sysattr_value_list, sysattr, value); |
1479 | val = udev_list_entry_get_value(list_entry); | |
1480 | goto out; | |
1481 | } | |
1482 | ||
912541b0 KS |
1483 | goto out; |
1484 | } | |
1485 | ||
1486 | /* skip directories */ | |
1487 | if (S_ISDIR(statbuf.st_mode)) | |
1488 | goto out; | |
1489 | ||
1490 | /* skip non-readable files */ | |
1491 | if ((statbuf.st_mode & S_IRUSR) == 0) | |
1492 | goto out; | |
1493 | ||
1494 | /* read attribute value */ | |
1495 | fd = open(path, O_RDONLY|O_CLOEXEC); | |
baa30fbc | 1496 | if (fd < 0) |
912541b0 | 1497 | goto out; |
912541b0 KS |
1498 | size = read(fd, value, sizeof(value)); |
1499 | close(fd); | |
1500 | if (size < 0) | |
1501 | goto out; | |
1502 | if (size == sizeof(value)) | |
1503 | goto out; | |
1504 | ||
1505 | /* got a valid value, store it in cache and return it */ | |
1506 | value[size] = '\0'; | |
1507 | util_remove_trailing_chars(value, '\n'); | |
912541b0 KS |
1508 | list_entry = udev_list_entry_add(&udev_device->sysattr_value_list, sysattr, value); |
1509 | val = udev_list_entry_get_value(list_entry); | |
93b0f384 | 1510 | out: |
912541b0 | 1511 | return val; |
93b0f384 | 1512 | } |
517814e7 | 1513 | |
946f1825 HR |
1514 | /** |
1515 | * udev_device_set_sysattr_value: | |
1516 | * @udev_device: udev device | |
1517 | * @sysattr: attribute name | |
1518 | * @value: new value to be set | |
1519 | * | |
1520 | * Update the contents of the sys attribute and the cached value of the device. | |
1521 | * | |
1522 | * Returns: Negative error code on failure or 0 on success. | |
1523 | **/ | |
1524 | _public_ int udev_device_set_sysattr_value(struct udev_device *udev_device, const char *sysattr, char *value) | |
1525 | { | |
1526 | struct udev_device *dev; | |
1527 | char path[UTIL_PATH_SIZE]; | |
1528 | struct stat statbuf; | |
1529 | int fd; | |
1530 | ssize_t size, value_len; | |
1531 | int ret = 0; | |
1532 | ||
1533 | if (udev_device == NULL) | |
1534 | return -EINVAL; | |
1535 | dev = udev_device; | |
1536 | if (sysattr == NULL) | |
1537 | return -EINVAL; | |
1538 | if (value == NULL) | |
1539 | value_len = 0; | |
1540 | else | |
1541 | value_len = strlen(value); | |
53726349 | 1542 | |
946f1825 HR |
1543 | strscpyl(path, sizeof(path), udev_device_get_syspath(dev), "/", sysattr, NULL); |
1544 | if (lstat(path, &statbuf) != 0) { | |
1545 | udev_list_entry_add(&dev->sysattr_value_list, sysattr, NULL); | |
1546 | ret = -ENXIO; | |
1547 | goto out; | |
1548 | } | |
1549 | ||
1550 | if (S_ISLNK(statbuf.st_mode)) { | |
53726349 | 1551 | ret = -EINVAL; |
946f1825 HR |
1552 | goto out; |
1553 | } | |
1554 | ||
1555 | /* skip directories */ | |
1556 | if (S_ISDIR(statbuf.st_mode)) { | |
1557 | ret = -EISDIR; | |
1558 | goto out; | |
1559 | } | |
1560 | ||
1561 | /* skip non-readable files */ | |
1562 | if ((statbuf.st_mode & S_IRUSR) == 0) { | |
1563 | ret = -EACCES; | |
1564 | goto out; | |
1565 | } | |
1566 | ||
1567 | /* Value is limited to 4k */ | |
1568 | if (value_len > 4096) { | |
1569 | ret = -EINVAL; | |
1570 | goto out; | |
1571 | } | |
1572 | util_remove_trailing_chars(value, '\n'); | |
1573 | ||
1574 | /* write attribute value */ | |
1575 | fd = open(path, O_WRONLY|O_CLOEXEC); | |
1576 | if (fd < 0) { | |
1577 | ret = -errno; | |
1578 | goto out; | |
1579 | } | |
1580 | size = write(fd, value, value_len); | |
1581 | close(fd); | |
1582 | if (size < 0) { | |
1583 | ret = -errno; | |
1584 | goto out; | |
1585 | } | |
1586 | if (size < value_len) { | |
1587 | ret = -EIO; | |
1588 | goto out; | |
1589 | } | |
1590 | ||
1591 | /* wrote a valid value, store it in cache and return it */ | |
1592 | udev_list_entry_add(&dev->sysattr_value_list, sysattr, value); | |
1593 | out: | |
1594 | if (dev != udev_device) | |
1595 | udev_device_unref(dev); | |
1596 | return ret; | |
1597 | } | |
1598 | ||
20bee04c | 1599 | static int udev_device_sysattr_list_read(struct udev_device *udev_device) |
f180ad25 | 1600 | { |
912541b0 KS |
1601 | struct dirent *dent; |
1602 | DIR *dir; | |
1603 | int num = 0; | |
f180ad25 | 1604 | |
912541b0 | 1605 | if (udev_device == NULL) |
994e0234 | 1606 | return -EINVAL; |
912541b0 KS |
1607 | if (udev_device->sysattr_list_read) |
1608 | return 0; | |
f180ad25 | 1609 | |
912541b0 | 1610 | dir = opendir(udev_device_get_syspath(udev_device)); |
baa30fbc | 1611 | if (!dir) |
994e0234 | 1612 | return -errno; |
f180ad25 | 1613 | |
912541b0 KS |
1614 | for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) { |
1615 | char path[UTIL_PATH_SIZE]; | |
1616 | struct stat statbuf; | |
f180ad25 | 1617 | |
912541b0 KS |
1618 | /* only handle symlinks and regular files */ |
1619 | if (dent->d_type != DT_LNK && dent->d_type != DT_REG) | |
1620 | continue; | |
f180ad25 | 1621 | |
d5a89d7d | 1622 | strscpyl(path, sizeof(path), udev_device_get_syspath(udev_device), "/", dent->d_name, NULL); |
912541b0 KS |
1623 | if (lstat(path, &statbuf) != 0) |
1624 | continue; | |
1625 | if ((statbuf.st_mode & S_IRUSR) == 0) | |
1626 | continue; | |
f180ad25 | 1627 | |
912541b0 KS |
1628 | udev_list_entry_add(&udev_device->sysattr_list, dent->d_name, NULL); |
1629 | num++; | |
1630 | } | |
f180ad25 | 1631 | |
912541b0 | 1632 | closedir(dir); |
912541b0 | 1633 | udev_device->sysattr_list_read = true; |
f180ad25 | 1634 | |
912541b0 | 1635 | return num; |
f180ad25 TE |
1636 | } |
1637 | ||
1638 | /** | |
1639 | * udev_device_get_sysattr_list_entry: | |
1640 | * @udev_device: udev device | |
1641 | * | |
1642 | * Retrieve the list of available sysattrs, with value being empty; | |
20bee04c KS |
1643 | * This just return all available sysfs attributes for a particular |
1644 | * device without reading their values. | |
f180ad25 TE |
1645 | * |
1646 | * Returns: the first entry of the property list | |
1647 | **/ | |
54cf0b7f | 1648 | _public_ struct udev_list_entry *udev_device_get_sysattr_list_entry(struct udev_device *udev_device) |
f180ad25 | 1649 | { |
912541b0 KS |
1650 | if (!udev_device->sysattr_list_read) { |
1651 | int ret; | |
1652 | ret = udev_device_sysattr_list_read(udev_device); | |
1653 | if (0 > ret) | |
1654 | return NULL; | |
1655 | } | |
f180ad25 | 1656 | |
912541b0 | 1657 | return udev_list_get_entry(&udev_device->sysattr_list); |
f180ad25 TE |
1658 | } |
1659 | ||
b2661839 | 1660 | static int udev_device_set_devnode(struct udev_device *udev_device, const char *devnode) |
11d543c1 | 1661 | { |
912541b0 KS |
1662 | free(udev_device->devnode); |
1663 | if (devnode[0] != '/') { | |
4cb72937 | 1664 | if (asprintf(&udev_device->devnode, "/dev/%s", devnode) < 0) |
912541b0 KS |
1665 | udev_device->devnode = NULL; |
1666 | } else { | |
1667 | udev_device->devnode = strdup(devnode); | |
1668 | } | |
1669 | if (udev_device->devnode == NULL) | |
1670 | return -ENOMEM; | |
df546eb5 | 1671 | udev_device_add_property_internal(udev_device, "DEVNAME", udev_device->devnode); |
912541b0 | 1672 | return 0; |
11d543c1 KS |
1673 | } |
1674 | ||
8a173387 | 1675 | int udev_device_add_devlink(struct udev_device *udev_device, const char *devlink) |
11d543c1 | 1676 | { |
912541b0 | 1677 | struct udev_list_entry *list_entry; |
6c29f2b9 | 1678 | |
912541b0 KS |
1679 | udev_device->devlinks_uptodate = false; |
1680 | list_entry = udev_list_entry_add(&udev_device->devlinks_list, devlink, NULL); | |
1681 | if (list_entry == NULL) | |
1682 | return -ENOMEM; | |
912541b0 | 1683 | return 0; |
11d543c1 KS |
1684 | } |
1685 | ||
4281da1f KS |
1686 | const char *udev_device_get_id_filename(struct udev_device *udev_device) |
1687 | { | |
912541b0 KS |
1688 | if (udev_device->id_filename == NULL) { |
1689 | if (udev_device_get_subsystem(udev_device) == NULL) | |
1690 | return NULL; | |
1691 | ||
1692 | if (major(udev_device_get_devnum(udev_device)) > 0) { | |
1693 | /* use dev_t -- b259:131072, c254:0 */ | |
1694 | if (asprintf(&udev_device->id_filename, "%c%u:%u", | |
33502ffe | 1695 | streq(udev_device_get_subsystem(udev_device), "block") ? 'b' : 'c', |
912541b0 KS |
1696 | major(udev_device_get_devnum(udev_device)), |
1697 | minor(udev_device_get_devnum(udev_device))) < 0) | |
1698 | udev_device->id_filename = NULL; | |
1699 | } else if (udev_device_get_ifindex(udev_device) > 0) { | |
1700 | /* use netdev ifindex -- n3 */ | |
1fa2f38f | 1701 | if (asprintf(&udev_device->id_filename, "n%i", udev_device_get_ifindex(udev_device)) < 0) |
912541b0 KS |
1702 | udev_device->id_filename = NULL; |
1703 | } else { | |
1704 | /* | |
1705 | * use $subsys:$syname -- pci:0000:00:1f.2 | |
1706 | * sysname() has '!' translated, get it from devpath | |
1707 | */ | |
1708 | const char *sysname; | |
1709 | sysname = strrchr(udev_device->devpath, '/'); | |
1710 | if (sysname == NULL) | |
1711 | return NULL; | |
1712 | sysname = &sysname[1]; | |
1713 | if (asprintf(&udev_device->id_filename, "+%s:%s", udev_device_get_subsystem(udev_device), sysname) < 0) | |
1714 | udev_device->id_filename = NULL; | |
1715 | } | |
1716 | } | |
1717 | return udev_device->id_filename; | |
4281da1f KS |
1718 | } |
1719 | ||
48a0170b KS |
1720 | /** |
1721 | * udev_device_get_is_initialized: | |
1722 | * @udev_device: udev device | |
1723 | * | |
1724 | * Check if udev has already handled the device and has set up | |
1725 | * device node permissions and context, or has renamed a network | |
1726 | * device. | |
1727 | * | |
9c6a11b1 | 1728 | * This is only implemented for devices with a device node |
48a0170b KS |
1729 | * or network interfaces. All other devices return 1 here. |
1730 | * | |
1731 | * Returns: 1 if the device is set up. 0 otherwise. | |
1732 | **/ | |
54cf0b7f | 1733 | _public_ int udev_device_get_is_initialized(struct udev_device *udev_device) |
48a0170b | 1734 | { |
912541b0 | 1735 | if (!udev_device->info_loaded) |
570b83cc | 1736 | udev_device_read_db(udev_device); |
912541b0 | 1737 | return udev_device->is_initialized; |
48a0170b KS |
1738 | } |
1739 | ||
1740 | void udev_device_set_is_initialized(struct udev_device *udev_device) | |
1741 | { | |
912541b0 | 1742 | udev_device->is_initialized = true; |
48a0170b KS |
1743 | } |
1744 | ||
8e3ba377 DH |
1745 | static bool is_valid_tag(const char *tag) |
1746 | { | |
1747 | return !strchr(tag, ':') && !strchr(tag, ' '); | |
1748 | } | |
1749 | ||
28460195 KS |
1750 | int udev_device_add_tag(struct udev_device *udev_device, const char *tag) |
1751 | { | |
8e3ba377 | 1752 | if (!is_valid_tag(tag)) |
912541b0 KS |
1753 | return -EINVAL; |
1754 | udev_device->tags_uptodate = false; | |
1755 | if (udev_list_entry_add(&udev_device->tags_list, tag, NULL) != NULL) | |
1756 | return 0; | |
1757 | return -ENOMEM; | |
28460195 KS |
1758 | } |
1759 | ||
8e3ba377 DH |
1760 | void udev_device_remove_tag(struct udev_device *udev_device, const char *tag) |
1761 | { | |
1762 | struct udev_list_entry *e; | |
1763 | ||
1764 | if (!is_valid_tag(tag)) | |
1765 | return; | |
1766 | e = udev_list_get_entry(&udev_device->tags_list); | |
1767 | e = udev_list_entry_get_by_name(e, tag); | |
1768 | if (e) { | |
1769 | udev_device->tags_uptodate = false; | |
1770 | udev_list_entry_delete(e); | |
1771 | } | |
1772 | } | |
1773 | ||
28460195 KS |
1774 | void udev_device_cleanup_tags_list(struct udev_device *udev_device) |
1775 | { | |
912541b0 KS |
1776 | udev_device->tags_uptodate = false; |
1777 | udev_list_cleanup(&udev_device->tags_list); | |
28460195 KS |
1778 | } |
1779 | ||
f712894d KS |
1780 | /** |
1781 | * udev_device_get_tags_list_entry: | |
1782 | * @udev_device: udev device | |
1783 | * | |
1784 | * Retrieve the list of tags attached to the udev device. The next | |
bb061708 | 1785 | * list entry can be retrieved with udev_list_entry_get_next(), |
f712894d | 1786 | * which returns #NULL if no more entries exist. The tag string |
bb061708 | 1787 | * can be retrieved from the list entry by udev_list_entry_get_name(). |
f712894d KS |
1788 | * |
1789 | * Returns: the first entry of the tag list | |
1790 | **/ | |
54cf0b7f | 1791 | _public_ struct udev_list_entry *udev_device_get_tags_list_entry(struct udev_device *udev_device) |
28460195 | 1792 | { |
912541b0 KS |
1793 | if (udev_device == NULL) |
1794 | return NULL; | |
1795 | if (!udev_device->info_loaded) | |
570b83cc | 1796 | udev_device_read_db(udev_device); |
912541b0 | 1797 | return udev_list_get_entry(&udev_device->tags_list); |
28460195 KS |
1798 | } |
1799 | ||
21dbe43a KS |
1800 | /** |
1801 | * udev_device_has_tag: | |
1802 | * @udev_device: udev device | |
1803 | * @tag: tag name | |
1804 | * | |
1805 | * Check if a given device has a certain tag associated. | |
1806 | * | |
1807 | * Returns: 1 if the tag is found. 0 otherwise. | |
1808 | **/ | |
54cf0b7f | 1809 | _public_ int udev_device_has_tag(struct udev_device *udev_device, const char *tag) |
28460195 | 1810 | { |
912541b0 | 1811 | struct udev_list_entry *list_entry; |
28460195 | 1812 | |
912541b0 KS |
1813 | if (udev_device == NULL) |
1814 | return false; | |
1815 | if (!udev_device->info_loaded) | |
570b83cc | 1816 | udev_device_read_db(udev_device); |
912541b0 KS |
1817 | list_entry = udev_device_get_tags_list_entry(udev_device); |
1818 | if (udev_list_entry_get_by_name(list_entry, tag) != NULL) | |
1819 | return true; | |
1820 | return false; | |
28460195 KS |
1821 | } |
1822 | ||
912541b0 KS |
1823 | #define ENVP_SIZE 128 |
1824 | #define MONITOR_BUF_SIZE 4096 | |
6493e655 | 1825 | static int update_envp_monitor_buf(struct udev_device *udev_device) |
979ff016 | 1826 | { |
912541b0 KS |
1827 | struct udev_list_entry *list_entry; |
1828 | char *s; | |
1829 | size_t l; | |
1830 | unsigned int i; | |
1831 | ||
1832 | /* monitor buffer of property strings */ | |
1833 | free(udev_device->monitor_buf); | |
1834 | udev_device->monitor_buf_len = 0; | |
1835 | udev_device->monitor_buf = malloc(MONITOR_BUF_SIZE); | |
1836 | if (udev_device->monitor_buf == NULL) | |
1837 | return -ENOMEM; | |
1838 | ||
1839 | /* envp array, strings will point into monitor buffer */ | |
1840 | if (udev_device->envp == NULL) | |
1841 | udev_device->envp = malloc(sizeof(char *) * ENVP_SIZE); | |
1842 | if (udev_device->envp == NULL) | |
1843 | return -ENOMEM; | |
1844 | ||
1845 | i = 0; | |
1846 | s = udev_device->monitor_buf; | |
1847 | l = MONITOR_BUF_SIZE; | |
1848 | udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(udev_device)) { | |
1849 | const char *key; | |
1850 | ||
1851 | key = udev_list_entry_get_name(list_entry); | |
1852 | /* skip private variables */ | |
1853 | if (key[0] == '.') | |
1854 | continue; | |
1855 | ||
1856 | /* add string to envp array */ | |
1857 | udev_device->envp[i++] = s; | |
1858 | if (i+1 >= ENVP_SIZE) | |
1859 | return -EINVAL; | |
1860 | ||
1861 | /* add property string to monitor buffer */ | |
d5a89d7d | 1862 | l = strpcpyl(&s, l, key, "=", udev_list_entry_get_value(list_entry), NULL); |
912541b0 KS |
1863 | if (l == 0) |
1864 | return -EINVAL; | |
d5a89d7d | 1865 | /* advance past the trailing '\0' that strpcpyl() guarantees */ |
912541b0 KS |
1866 | s++; |
1867 | l--; | |
1868 | } | |
1869 | udev_device->envp[i] = NULL; | |
1870 | udev_device->monitor_buf_len = s - udev_device->monitor_buf; | |
1871 | udev_device->envp_uptodate = true; | |
912541b0 | 1872 | return 0; |
6493e655 KS |
1873 | } |
1874 | ||
1875 | char **udev_device_get_properties_envp(struct udev_device *udev_device) | |
1876 | { | |
912541b0 KS |
1877 | if (!udev_device->envp_uptodate) |
1878 | if (update_envp_monitor_buf(udev_device) != 0) | |
1879 | return NULL; | |
1880 | return udev_device->envp; | |
6493e655 KS |
1881 | } |
1882 | ||
1883 | ssize_t udev_device_get_properties_monitor_buf(struct udev_device *udev_device, const char **buf) | |
1884 | { | |
912541b0 KS |
1885 | if (!udev_device->envp_uptodate) |
1886 | if (update_envp_monitor_buf(udev_device) != 0) | |
1887 | return -EINVAL; | |
1888 | *buf = udev_device->monitor_buf; | |
1889 | return udev_device->monitor_buf_len; | |
c2654402 KS |
1890 | } |
1891 | ||
8cd2e972 | 1892 | int udev_device_set_action(struct udev_device *udev_device, const char *action) |
c4f5f942 | 1893 | { |
912541b0 KS |
1894 | free(udev_device->action); |
1895 | udev_device->action = strdup(action); | |
1896 | if (udev_device->action == NULL) | |
1897 | return -ENOMEM; | |
df546eb5 | 1898 | udev_device_add_property_internal(udev_device, "ACTION", udev_device->action); |
912541b0 | 1899 | return 0; |
c4f5f942 KS |
1900 | } |
1901 | ||
8cd2e972 | 1902 | int udev_device_get_devlink_priority(struct udev_device *udev_device) |
6bd1c78a | 1903 | { |
912541b0 | 1904 | if (!udev_device->info_loaded) |
570b83cc | 1905 | udev_device_read_db(udev_device); |
912541b0 | 1906 | return udev_device->devlink_priority; |
6bd1c78a KS |
1907 | } |
1908 | ||
8cd2e972 | 1909 | int udev_device_set_devlink_priority(struct udev_device *udev_device, int prio) |
6bd1c78a | 1910 | { |
912541b0 KS |
1911 | udev_device->devlink_priority = prio; |
1912 | return 0; | |
6bd1c78a KS |
1913 | } |
1914 | ||
d7ce7539 SJR |
1915 | int udev_device_get_watch_handle(struct udev_device *udev_device) |
1916 | { | |
912541b0 | 1917 | if (!udev_device->info_loaded) |
570b83cc | 1918 | udev_device_read_db(udev_device); |
912541b0 | 1919 | return udev_device->watch_handle; |
d7ce7539 SJR |
1920 | } |
1921 | ||
1922 | int udev_device_set_watch_handle(struct udev_device *udev_device, int handle) | |
1923 | { | |
912541b0 KS |
1924 | udev_device->watch_handle = handle; |
1925 | return 0; | |
d7ce7539 | 1926 | } |
fc416258 | 1927 | |
9ead6627 KS |
1928 | bool udev_device_get_db_persist(struct udev_device *udev_device) |
1929 | { | |
912541b0 | 1930 | return udev_device->db_persist; |
9ead6627 KS |
1931 | } |
1932 | ||
1933 | void udev_device_set_db_persist(struct udev_device *udev_device) | |
1934 | { | |
912541b0 | 1935 | udev_device->db_persist = true; |
9ead6627 | 1936 | } |
243d1825 TG |
1937 | |
1938 | int udev_device_rename(struct udev_device *udev_device, const char *name) | |
1939 | { | |
1940 | _cleanup_free_ char *dirname = NULL; | |
3738cc85 | 1941 | const char *interface; |
243d1825 TG |
1942 | char *new_syspath; |
1943 | int r; | |
1944 | ||
1945 | if (udev_device == NULL || name == NULL) | |
1946 | return -EINVAL; | |
1947 | ||
1948 | dirname = dirname_malloc(udev_device->syspath); | |
1949 | if (!dirname) | |
1950 | return -ENOMEM; | |
1951 | ||
63c372cb | 1952 | new_syspath = strjoina(dirname, "/", name); |
243d1825 TG |
1953 | |
1954 | r = udev_device_set_syspath(udev_device, new_syspath); | |
1955 | if (r < 0) | |
1956 | return r; | |
1957 | ||
3738cc85 TG |
1958 | interface = udev_device_get_property_value(udev_device, "INTERFACE"); |
1959 | if (interface) { | |
1960 | /* like DEVPATH_OLD, INTERFACE_OLD is not saved to the db, but only stays around for the current event */ | |
df546eb5 TG |
1961 | udev_device_add_property_internal(udev_device, "INTERFACE_OLD", interface); |
1962 | udev_device_add_property_internal(udev_device, "INTERFACE", name); | |
3738cc85 TG |
1963 | } |
1964 | ||
243d1825 TG |
1965 | return 0; |
1966 | } | |
fa639f3a TG |
1967 | |
1968 | struct udev_device *udev_device_shallow_clone(struct udev_device *old_device) | |
1969 | { | |
1970 | struct udev_device *device; | |
1971 | ||
1972 | if (old_device == NULL) | |
1973 | return NULL; | |
1974 | ||
1975 | device = udev_device_new(old_device->udev); | |
1976 | if (!device) { | |
1977 | errno = ENOMEM; | |
1978 | ||
1979 | return NULL; | |
1980 | } | |
1981 | ||
1982 | udev_device_set_syspath(device, udev_device_get_syspath(old_device)); | |
1983 | udev_device_set_subsystem(device, udev_device_get_subsystem(old_device)); | |
1984 | udev_device_set_devnum(device, udev_device_get_devnum(old_device)); | |
1985 | ||
1986 | return device; | |
1987 | } | |
2df959ec TG |
1988 | |
1989 | struct udev_device *udev_device_new_from_nulstr(struct udev *udev, char *nulstr, ssize_t buflen) { | |
1990 | struct udev_device *device; | |
1991 | ssize_t bufpos = 0; | |
1992 | ||
1993 | if (nulstr == NULL || buflen <= 0) { | |
1994 | errno = EINVAL; | |
1995 | ||
1996 | return NULL; | |
1997 | } | |
1998 | ||
1999 | device = udev_device_new(udev); | |
2000 | if (!device) { | |
2001 | errno = ENOMEM; | |
2002 | ||
2003 | return NULL; | |
2004 | } | |
2005 | ||
2006 | udev_device_set_info_loaded(device); | |
2007 | ||
2008 | while (bufpos < buflen) { | |
2009 | char *key; | |
2010 | size_t keylen; | |
2011 | ||
2012 | key = nulstr + bufpos; | |
2013 | keylen = strlen(key); | |
2014 | if (keylen == 0) | |
2015 | break; | |
2016 | ||
2017 | bufpos += keylen + 1; | |
2018 | udev_device_add_property_from_string_parse(device, key); | |
2019 | } | |
2020 | ||
2021 | if (udev_device_add_property_from_string_parse_finish(device) < 0) { | |
2022 | log_debug("missing values, invalid device"); | |
2023 | ||
2024 | udev_device_unref(device); | |
2025 | ||
2026 | errno = EINVAL; | |
2027 | ||
2028 | return NULL; | |
2029 | } | |
2030 | ||
2031 | return device; | |
2032 | } |