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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 | |
ce1d6d7f KS |
39 | /** |
40 | * SECTION:libudev-device | |
41 | * @short_description: kernel sys devices | |
42 | * | |
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 | |
214a6c79 | 46 | * a unique name inside that subsystem. |
ce1d6d7f KS |
47 | */ |
48 | ||
1e511322 KS |
49 | /** |
50 | * udev_device: | |
51 | * | |
ce1d6d7f | 52 | * Opaque object representing one kernel sys device. |
1e511322 | 53 | */ |
11d543c1 | 54 | struct udev_device { |
912541b0 KS |
55 | struct udev *udev; |
56 | struct udev_device *parent_device; | |
57 | char *syspath; | |
58 | const char *devpath; | |
59 | char *sysname; | |
60 | const char *sysnum; | |
61 | char *devnode; | |
62 | mode_t devnode_mode; | |
1edefa4f KS |
63 | uid_t devnode_uid; |
64 | gid_t devnode_gid; | |
912541b0 KS |
65 | char *subsystem; |
66 | char *devtype; | |
67 | char *driver; | |
68 | char *action; | |
69 | char *devpath_old; | |
70 | char *id_filename; | |
71 | char **envp; | |
72 | char *monitor_buf; | |
73 | size_t monitor_buf_len; | |
74 | struct udev_list devlinks_list; | |
75 | struct udev_list properties_list; | |
76 | struct udev_list sysattr_value_list; | |
77 | struct udev_list sysattr_list; | |
78 | struct udev_list tags_list; | |
79 | unsigned long long int seqnum; | |
40fe8b11 | 80 | usec_t usec_initialized; |
912541b0 KS |
81 | int devlink_priority; |
82 | int refcount; | |
83 | dev_t devnum; | |
84 | int ifindex; | |
85 | int watch_handle; | |
86 | int maj, min; | |
87 | bool parent_set; | |
88 | bool subsystem_set; | |
89 | bool devtype_set; | |
90 | bool devlinks_uptodate; | |
91 | bool envp_uptodate; | |
92 | bool tags_uptodate; | |
93 | bool driver_set; | |
94 | bool info_loaded; | |
95 | bool db_loaded; | |
96 | bool uevent_loaded; | |
97 | bool is_initialized; | |
98 | bool sysattr_list_read; | |
99 | bool db_persist; | |
11d543c1 KS |
100 | }; |
101 | ||
905555dc | 102 | /** |
a3321f68 | 103 | * udev_device_get_seqnum: |
905555dc KS |
104 | * @udev_device: udev device |
105 | * | |
106 | * This is only valid if the device was received through a monitor. Devices read from | |
107 | * sys do not have a sequence number. | |
108 | * | |
109 | * Returns: the kernel event sequence number, or 0 if there is no sequence number available. | |
110 | **/ | |
54cf0b7f | 111 | _public_ unsigned long long int udev_device_get_seqnum(struct udev_device *udev_device) |
905555dc | 112 | { |
912541b0 KS |
113 | if (udev_device == NULL) |
114 | return 0; | |
115 | return udev_device->seqnum; | |
905555dc KS |
116 | } |
117 | ||
118 | static int udev_device_set_seqnum(struct udev_device *udev_device, unsigned long long int seqnum) | |
119 | { | |
912541b0 | 120 | char num[32]; |
905555dc | 121 | |
912541b0 KS |
122 | udev_device->seqnum = seqnum; |
123 | snprintf(num, sizeof(num), "%llu", seqnum); | |
124 | udev_device_add_property(udev_device, "SEQNUM", num); | |
125 | return 0; | |
905555dc KS |
126 | } |
127 | ||
128 | int udev_device_get_ifindex(struct udev_device *udev_device) | |
129 | { | |
912541b0 KS |
130 | if (!udev_device->info_loaded) |
131 | udev_device_read_uevent_file(udev_device); | |
132 | return udev_device->ifindex; | |
905555dc KS |
133 | } |
134 | ||
135 | static int udev_device_set_ifindex(struct udev_device *udev_device, int ifindex) | |
136 | { | |
912541b0 | 137 | char num[32]; |
905555dc | 138 | |
912541b0 KS |
139 | udev_device->ifindex = ifindex; |
140 | snprintf(num, sizeof(num), "%u", ifindex); | |
141 | udev_device_add_property(udev_device, "IFINDEX", num); | |
142 | return 0; | |
905555dc KS |
143 | } |
144 | ||
145 | /** | |
146 | * udev_device_get_devnum: | |
147 | * @udev_device: udev device | |
148 | * | |
21dbe43a KS |
149 | * Get the device major/minor number. |
150 | * | |
151 | * Returns: the dev_t number. | |
905555dc | 152 | **/ |
54cf0b7f | 153 | _public_ dev_t udev_device_get_devnum(struct udev_device *udev_device) |
905555dc | 154 | { |
912541b0 KS |
155 | if (udev_device == NULL) |
156 | return makedev(0, 0); | |
157 | if (!udev_device->info_loaded) | |
158 | udev_device_read_uevent_file(udev_device); | |
159 | return udev_device->devnum; | |
905555dc KS |
160 | } |
161 | ||
162 | static int udev_device_set_devnum(struct udev_device *udev_device, dev_t devnum) | |
163 | { | |
912541b0 | 164 | char num[32]; |
905555dc | 165 | |
912541b0 | 166 | udev_device->devnum = devnum; |
905555dc | 167 | |
912541b0 KS |
168 | snprintf(num, sizeof(num), "%u", major(devnum)); |
169 | udev_device_add_property(udev_device, "MAJOR", num); | |
170 | snprintf(num, sizeof(num), "%u", minor(devnum)); | |
171 | udev_device_add_property(udev_device, "MINOR", num); | |
172 | return 0; | |
905555dc KS |
173 | } |
174 | ||
905555dc KS |
175 | const char *udev_device_get_devpath_old(struct udev_device *udev_device) |
176 | { | |
912541b0 | 177 | return udev_device->devpath_old; |
905555dc KS |
178 | } |
179 | ||
180 | static int udev_device_set_devpath_old(struct udev_device *udev_device, const char *devpath_old) | |
181 | { | |
912541b0 | 182 | const char *pos; |
905555dc | 183 | |
912541b0 KS |
184 | free(udev_device->devpath_old); |
185 | udev_device->devpath_old = strdup(devpath_old); | |
186 | if (udev_device->devpath_old == NULL) | |
187 | return -ENOMEM; | |
188 | udev_device_add_property(udev_device, "DEVPATH_OLD", udev_device->devpath_old); | |
905555dc | 189 | |
912541b0 KS |
190 | pos = strrchr(udev_device->devpath_old, '/'); |
191 | if (pos == NULL) | |
192 | return -EINVAL; | |
193 | return 0; | |
905555dc KS |
194 | } |
195 | ||
196 | /** | |
197 | * udev_device_get_driver: | |
198 | * @udev_device: udev device | |
199 | * | |
21dbe43a KS |
200 | * Get the kernel driver name. |
201 | * | |
202 | * Returns: the driver name string, or #NULL if there is no driver attached. | |
905555dc | 203 | **/ |
54cf0b7f | 204 | _public_ const char *udev_device_get_driver(struct udev_device *udev_device) |
905555dc | 205 | { |
912541b0 | 206 | char driver[UTIL_NAME_SIZE]; |
905555dc | 207 | |
912541b0 KS |
208 | if (udev_device == NULL) |
209 | return NULL; | |
210 | if (!udev_device->driver_set) { | |
211 | udev_device->driver_set = true; | |
212 | if (util_get_sys_core_link_value(udev_device->udev, "driver", udev_device->syspath, driver, sizeof(driver)) > 0) | |
213 | udev_device->driver = strdup(driver); | |
214 | } | |
215 | return udev_device->driver; | |
905555dc KS |
216 | } |
217 | ||
218 | static int udev_device_set_driver(struct udev_device *udev_device, const char *driver) | |
219 | { | |
912541b0 KS |
220 | free(udev_device->driver); |
221 | udev_device->driver = strdup(driver); | |
222 | if (udev_device->driver == NULL) | |
223 | return -ENOMEM; | |
224 | udev_device->driver_set = true; | |
225 | udev_device_add_property(udev_device, "DRIVER", udev_device->driver); | |
226 | return 0; | |
905555dc KS |
227 | } |
228 | ||
229 | /** | |
230 | * udev_device_get_devtype: | |
231 | * @udev_device: udev device | |
232 | * | |
233 | * Retrieve the devtype string of the udev device. | |
234 | * | |
235 | * Returns: the devtype name of the udev device, or #NULL if it can not be determined | |
236 | **/ | |
54cf0b7f | 237 | _public_ const char *udev_device_get_devtype(struct udev_device *udev_device) |
905555dc | 238 | { |
912541b0 KS |
239 | if (udev_device == NULL) |
240 | return NULL; | |
241 | if (!udev_device->devtype_set) { | |
242 | udev_device->devtype_set = true; | |
243 | udev_device_read_uevent_file(udev_device); | |
244 | } | |
245 | return udev_device->devtype; | |
905555dc KS |
246 | } |
247 | ||
248 | static int udev_device_set_devtype(struct udev_device *udev_device, const char *devtype) | |
249 | { | |
912541b0 KS |
250 | free(udev_device->devtype); |
251 | udev_device->devtype = strdup(devtype); | |
252 | if (udev_device->devtype == NULL) | |
253 | return -ENOMEM; | |
254 | udev_device->devtype_set = true; | |
255 | udev_device_add_property(udev_device, "DEVTYPE", udev_device->devtype); | |
256 | return 0; | |
905555dc KS |
257 | } |
258 | ||
40fe8b11 | 259 | int udev_device_set_subsystem(struct udev_device *udev_device, const char *subsystem) |
905555dc | 260 | { |
912541b0 KS |
261 | free(udev_device->subsystem); |
262 | udev_device->subsystem = strdup(subsystem); | |
263 | if (udev_device->subsystem == NULL) | |
264 | return -ENOMEM; | |
265 | udev_device->subsystem_set = true; | |
266 | udev_device_add_property(udev_device, "SUBSYSTEM", udev_device->subsystem); | |
267 | return 0; | |
905555dc KS |
268 | } |
269 | ||
270 | /** | |
271 | * udev_device_get_subsystem: | |
272 | * @udev_device: udev device | |
273 | * | |
274 | * Retrieve the subsystem string of the udev device. The string does not | |
275 | * contain any "/". | |
276 | * | |
277 | * Returns: the subsystem name of the udev device, or #NULL if it can not be determined | |
278 | **/ | |
54cf0b7f | 279 | _public_ const char *udev_device_get_subsystem(struct udev_device *udev_device) |
905555dc | 280 | { |
912541b0 KS |
281 | char subsystem[UTIL_NAME_SIZE]; |
282 | ||
283 | if (udev_device == NULL) | |
284 | return NULL; | |
285 | if (!udev_device->subsystem_set) { | |
286 | udev_device->subsystem_set = true; | |
287 | /* read "subsystem" link */ | |
288 | if (util_get_sys_core_link_value(udev_device->udev, "subsystem", udev_device->syspath, subsystem, sizeof(subsystem)) > 0) { | |
289 | udev_device_set_subsystem(udev_device, subsystem); | |
290 | return udev_device->subsystem; | |
291 | } | |
292 | /* implicit names */ | |
33502ffe | 293 | if (startswith(udev_device->devpath, "/module/")) { |
912541b0 KS |
294 | udev_device_set_subsystem(udev_device, "module"); |
295 | return udev_device->subsystem; | |
296 | } | |
297 | if (strstr(udev_device->devpath, "/drivers/") != NULL) { | |
298 | udev_device_set_subsystem(udev_device, "drivers"); | |
299 | return udev_device->subsystem; | |
300 | } | |
33502ffe KS |
301 | if (startswith(udev_device->devpath, "/subsystem/") || |
302 | startswith(udev_device->devpath, "/class/") || | |
303 | startswith(udev_device->devpath, "/bus/")) { | |
912541b0 KS |
304 | udev_device_set_subsystem(udev_device, "subsystem"); |
305 | return udev_device->subsystem; | |
306 | } | |
307 | } | |
308 | return udev_device->subsystem; | |
905555dc KS |
309 | } |
310 | ||
311 | mode_t udev_device_get_devnode_mode(struct udev_device *udev_device) | |
312 | { | |
912541b0 KS |
313 | if (!udev_device->info_loaded) |
314 | udev_device_read_uevent_file(udev_device); | |
315 | return udev_device->devnode_mode; | |
905555dc KS |
316 | } |
317 | ||
318 | static int udev_device_set_devnode_mode(struct udev_device *udev_device, mode_t mode) | |
319 | { | |
912541b0 | 320 | char num[32]; |
905555dc | 321 | |
912541b0 KS |
322 | udev_device->devnode_mode = mode; |
323 | snprintf(num, sizeof(num), "%#o", mode); | |
324 | udev_device_add_property(udev_device, "DEVMODE", num); | |
325 | return 0; | |
905555dc KS |
326 | } |
327 | ||
1edefa4f KS |
328 | uid_t udev_device_get_devnode_uid(struct udev_device *udev_device) |
329 | { | |
330 | if (!udev_device->info_loaded) | |
331 | udev_device_read_uevent_file(udev_device); | |
332 | return udev_device->devnode_uid; | |
333 | } | |
334 | ||
335 | static int udev_device_set_devnode_uid(struct udev_device *udev_device, uid_t uid) | |
336 | { | |
337 | char num[32]; | |
338 | ||
339 | udev_device->devnode_uid = uid; | |
340 | snprintf(num, sizeof(num), "%u", uid); | |
341 | udev_device_add_property(udev_device, "DEVUID", num); | |
342 | return 0; | |
343 | } | |
344 | ||
345 | gid_t udev_device_get_devnode_gid(struct udev_device *udev_device) | |
346 | { | |
347 | if (!udev_device->info_loaded) | |
348 | udev_device_read_uevent_file(udev_device); | |
349 | return udev_device->devnode_gid; | |
350 | } | |
351 | ||
352 | static int udev_device_set_devnode_gid(struct udev_device *udev_device, gid_t gid) | |
353 | { | |
354 | char num[32]; | |
355 | ||
356 | udev_device->devnode_gid = gid; | |
357 | snprintf(num, sizeof(num), "%u", gid); | |
358 | udev_device_add_property(udev_device, "DEVGID", num); | |
359 | return 0; | |
360 | } | |
361 | ||
fc8d61c5 KS |
362 | struct udev_list_entry *udev_device_add_property(struct udev_device *udev_device, const char *key, const char *value) |
363 | { | |
912541b0 KS |
364 | udev_device->envp_uptodate = false; |
365 | if (value == NULL) { | |
366 | struct udev_list_entry *list_entry; | |
fc8d61c5 | 367 | |
912541b0 KS |
368 | list_entry = udev_device_get_properties_list_entry(udev_device); |
369 | list_entry = udev_list_entry_get_by_name(list_entry, key); | |
370 | if (list_entry != NULL) | |
371 | udev_list_entry_delete(list_entry); | |
372 | return NULL; | |
373 | } | |
374 | return udev_list_entry_add(&udev_device->properties_list, key, value); | |
fc8d61c5 KS |
375 | } |
376 | ||
377 | static struct udev_list_entry *udev_device_add_property_from_string(struct udev_device *udev_device, const char *property) | |
378 | { | |
912541b0 KS |
379 | char name[UTIL_LINE_SIZE]; |
380 | char *val; | |
fc8d61c5 | 381 | |
d5a89d7d | 382 | strscpy(name, sizeof(name), property); |
912541b0 KS |
383 | val = strchr(name, '='); |
384 | if (val == NULL) | |
385 | return NULL; | |
386 | val[0] = '\0'; | |
387 | val = &val[1]; | |
388 | if (val[0] == '\0') | |
389 | val = NULL; | |
390 | return udev_device_add_property(udev_device, name, val); | |
fc8d61c5 KS |
391 | } |
392 | ||
393 | /* | |
394 | * parse property string, and if needed, update internal values accordingly | |
395 | * | |
396 | * udev_device_add_property_from_string_parse_finish() needs to be | |
397 | * called after adding properties, and its return value checked | |
398 | * | |
399 | * udev_device_set_info_loaded() needs to be set, to avoid trying | |
400 | * to use a device without a DEVPATH set | |
401 | */ | |
402 | void udev_device_add_property_from_string_parse(struct udev_device *udev_device, const char *property) | |
403 | { | |
33502ffe | 404 | if (startswith(property, "DEVPATH=")) { |
912541b0 KS |
405 | char path[UTIL_PATH_SIZE]; |
406 | ||
d5a89d7d | 407 | strscpyl(path, sizeof(path), "/sys", &property[8], NULL); |
912541b0 | 408 | udev_device_set_syspath(udev_device, path); |
33502ffe | 409 | } else if (startswith(property, "SUBSYSTEM=")) { |
912541b0 | 410 | udev_device_set_subsystem(udev_device, &property[10]); |
33502ffe | 411 | } else if (startswith(property, "DEVTYPE=")) { |
912541b0 | 412 | udev_device_set_devtype(udev_device, &property[8]); |
33502ffe | 413 | } else if (startswith(property, "DEVNAME=")) { |
912541b0 | 414 | udev_device_set_devnode(udev_device, &property[8]); |
33502ffe | 415 | } else if (startswith(property, "DEVLINKS=")) { |
912541b0 KS |
416 | char devlinks[UTIL_PATH_SIZE]; |
417 | char *slink; | |
418 | char *next; | |
419 | ||
d5a89d7d | 420 | strscpy(devlinks, sizeof(devlinks), &property[9]); |
912541b0 KS |
421 | slink = devlinks; |
422 | next = strchr(slink, ' '); | |
423 | while (next != NULL) { | |
424 | next[0] = '\0'; | |
8a173387 | 425 | udev_device_add_devlink(udev_device, slink); |
912541b0 KS |
426 | slink = &next[1]; |
427 | next = strchr(slink, ' '); | |
428 | } | |
429 | if (slink[0] != '\0') | |
8a173387 | 430 | udev_device_add_devlink(udev_device, slink); |
33502ffe | 431 | } else if (startswith(property, "TAGS=")) { |
912541b0 KS |
432 | char tags[UTIL_PATH_SIZE]; |
433 | char *next; | |
434 | ||
d5a89d7d | 435 | strscpy(tags, sizeof(tags), &property[5]); |
912541b0 KS |
436 | next = strchr(tags, ':'); |
437 | if (next != NULL) { | |
438 | next++; | |
439 | while (next[0] != '\0') { | |
440 | char *tag; | |
441 | ||
442 | tag = next; | |
443 | next = strchr(tag, ':'); | |
444 | if (next == NULL) | |
445 | break; | |
446 | next[0] = '\0'; | |
447 | next++; | |
448 | udev_device_add_tag(udev_device, tag); | |
449 | } | |
450 | } | |
33502ffe | 451 | } else if (startswith(property, "USEC_INITIALIZED=")) { |
912541b0 | 452 | udev_device_set_usec_initialized(udev_device, strtoull(&property[19], NULL, 10)); |
33502ffe | 453 | } else if (startswith(property, "DRIVER=")) { |
912541b0 | 454 | udev_device_set_driver(udev_device, &property[7]); |
33502ffe | 455 | } else if (startswith(property, "ACTION=")) { |
912541b0 | 456 | udev_device_set_action(udev_device, &property[7]); |
33502ffe | 457 | } else if (startswith(property, "MAJOR=")) { |
912541b0 | 458 | udev_device->maj = strtoull(&property[6], NULL, 10); |
33502ffe | 459 | } else if (startswith(property, "MINOR=")) { |
912541b0 | 460 | udev_device->min = strtoull(&property[6], NULL, 10); |
33502ffe | 461 | } else if (startswith(property, "DEVPATH_OLD=")) { |
912541b0 | 462 | udev_device_set_devpath_old(udev_device, &property[12]); |
33502ffe | 463 | } else if (startswith(property, "SEQNUM=")) { |
912541b0 | 464 | udev_device_set_seqnum(udev_device, strtoull(&property[7], NULL, 10)); |
33502ffe | 465 | } else if (startswith(property, "IFINDEX=")) { |
912541b0 | 466 | udev_device_set_ifindex(udev_device, strtoull(&property[8], NULL, 10)); |
33502ffe | 467 | } else if (startswith(property, "DEVMODE=")) { |
912541b0 | 468 | udev_device_set_devnode_mode(udev_device, strtoul(&property[8], NULL, 8)); |
1edefa4f KS |
469 | } else if (startswith(property, "DEVUID=")) { |
470 | udev_device_set_devnode_uid(udev_device, strtoul(&property[7], NULL, 10)); | |
471 | } else if (startswith(property, "DEVGID=")) { | |
472 | udev_device_set_devnode_gid(udev_device, strtoul(&property[7], NULL, 10)); | |
912541b0 KS |
473 | } else { |
474 | udev_device_add_property_from_string(udev_device, property); | |
475 | } | |
fc8d61c5 KS |
476 | } |
477 | ||
478 | int udev_device_add_property_from_string_parse_finish(struct udev_device *udev_device) | |
479 | { | |
912541b0 KS |
480 | if (udev_device->maj > 0) |
481 | udev_device_set_devnum(udev_device, makedev(udev_device->maj, udev_device->min)); | |
482 | udev_device->maj = 0; | |
483 | udev_device->min = 0; | |
fc8d61c5 | 484 | |
912541b0 KS |
485 | if (udev_device->devpath == NULL || udev_device->subsystem == NULL) |
486 | return -EINVAL; | |
487 | return 0; | |
fc8d61c5 KS |
488 | } |
489 | ||
490 | /** | |
491 | * udev_device_get_property_value: | |
492 | * @udev_device: udev device | |
493 | * @key: property name | |
494 | * | |
21dbe43a KS |
495 | * Get the value of a given property. |
496 | * | |
497 | * Returns: the property string, or #NULL if there is no such property. | |
fc8d61c5 | 498 | **/ |
54cf0b7f | 499 | _public_ const char *udev_device_get_property_value(struct udev_device *udev_device, const char *key) |
fc8d61c5 | 500 | { |
912541b0 | 501 | struct udev_list_entry *list_entry; |
fc8d61c5 | 502 | |
912541b0 KS |
503 | if (udev_device == NULL) |
504 | return NULL; | |
505 | if (key == NULL) | |
506 | return NULL; | |
fc8d61c5 | 507 | |
912541b0 KS |
508 | list_entry = udev_device_get_properties_list_entry(udev_device); |
509 | list_entry = udev_list_entry_get_by_name(list_entry, key); | |
510 | return udev_list_entry_get_value(list_entry); | |
fc8d61c5 KS |
511 | } |
512 | ||
5f59fa09 | 513 | int udev_device_read_db(struct udev_device *udev_device, const char *dbfile) |
e88a82b5 | 514 | { |
912541b0 KS |
515 | char filename[UTIL_PATH_SIZE]; |
516 | char line[UTIL_LINE_SIZE]; | |
517 | FILE *f; | |
518 | ||
519 | /* providing a database file will always force-load it */ | |
520 | if (dbfile == NULL) { | |
521 | const char *id; | |
522 | ||
523 | if (udev_device->db_loaded) | |
524 | return 0; | |
525 | udev_device->db_loaded = true; | |
526 | ||
527 | id = udev_device_get_id_filename(udev_device); | |
528 | if (id == NULL) | |
529 | return -1; | |
d5a89d7d | 530 | strscpyl(filename, sizeof(filename), "/run/udev/data/", id, NULL); |
912541b0 KS |
531 | dbfile = filename; |
532 | } | |
533 | ||
534 | f = fopen(dbfile, "re"); | |
535 | if (f == NULL) { | |
c8f8394a | 536 | udev_dbg(udev_device->udev, "no db file to read %s: %m\n", dbfile); |
912541b0 KS |
537 | return -1; |
538 | } | |
539 | udev_device->is_initialized = true; | |
540 | ||
541 | while (fgets(line, sizeof(line), f)) { | |
542 | ssize_t len; | |
543 | const char *val; | |
544 | struct udev_list_entry *entry; | |
545 | ||
546 | len = strlen(line); | |
547 | if (len < 4) | |
548 | break; | |
549 | line[len-1] = '\0'; | |
550 | val = &line[2]; | |
551 | switch(line[0]) { | |
552 | case 'S': | |
d5a89d7d | 553 | strscpyl(filename, sizeof(filename), "/dev/", val, NULL); |
8a173387 | 554 | udev_device_add_devlink(udev_device, filename); |
912541b0 KS |
555 | break; |
556 | case 'L': | |
557 | udev_device_set_devlink_priority(udev_device, atoi(val)); | |
558 | break; | |
559 | case 'E': | |
560 | entry = udev_device_add_property_from_string(udev_device, val); | |
561 | udev_list_entry_set_num(entry, true); | |
562 | break; | |
563 | case 'G': | |
564 | udev_device_add_tag(udev_device, val); | |
565 | break; | |
566 | case 'W': | |
567 | udev_device_set_watch_handle(udev_device, atoi(val)); | |
568 | break; | |
569 | case 'I': | |
570 | udev_device_set_usec_initialized(udev_device, strtoull(val, NULL, 10)); | |
571 | break; | |
572 | } | |
573 | } | |
574 | fclose(f); | |
575 | ||
c8f8394a | 576 | udev_dbg(udev_device->udev, "device %p filled with db file data\n", udev_device); |
912541b0 | 577 | return 0; |
e88a82b5 KS |
578 | } |
579 | ||
bd85566c | 580 | int udev_device_read_uevent_file(struct udev_device *udev_device) |
99214844 | 581 | { |
912541b0 KS |
582 | char filename[UTIL_PATH_SIZE]; |
583 | FILE *f; | |
584 | char line[UTIL_LINE_SIZE]; | |
585 | int maj = 0; | |
586 | int min = 0; | |
587 | ||
588 | if (udev_device->uevent_loaded) | |
589 | return 0; | |
590 | ||
d5a89d7d | 591 | strscpyl(filename, sizeof(filename), udev_device->syspath, "/uevent", NULL); |
912541b0 KS |
592 | f = fopen(filename, "re"); |
593 | if (f == NULL) | |
594 | return -1; | |
595 | udev_device->uevent_loaded = true; | |
596 | ||
597 | while (fgets(line, sizeof(line), f)) { | |
598 | char *pos; | |
599 | ||
600 | pos = strchr(line, '\n'); | |
601 | if (pos == NULL) | |
602 | continue; | |
603 | pos[0] = '\0'; | |
604 | ||
33502ffe | 605 | if (startswith(line, "DEVTYPE=")) { |
912541b0 | 606 | udev_device_set_devtype(udev_device, &line[8]); |
d2b795f2 KS |
607 | continue; |
608 | } | |
33502ffe | 609 | if (startswith(line, "IFINDEX=")) { |
d2b795f2 KS |
610 | udev_device_set_ifindex(udev_device, strtoull(&line[8], NULL, 10)); |
611 | continue; | |
612 | } | |
33502ffe | 613 | if (startswith(line, "DEVNAME=")) { |
d2b795f2 KS |
614 | udev_device_set_devnode(udev_device, &line[8]); |
615 | continue; | |
616 | } | |
617 | ||
33502ffe | 618 | if (startswith(line, "MAJOR=")) |
912541b0 | 619 | maj = strtoull(&line[6], NULL, 10); |
33502ffe | 620 | else if (startswith(line, "MINOR=")) |
912541b0 | 621 | min = strtoull(&line[6], NULL, 10); |
33502ffe | 622 | else if (startswith(line, "DEVMODE=")) |
912541b0 KS |
623 | udev_device->devnode_mode = strtoul(&line[8], NULL, 8); |
624 | ||
625 | udev_device_add_property_from_string(udev_device, line); | |
626 | } | |
627 | ||
628 | udev_device->devnum = makedev(maj, min); | |
629 | fclose(f); | |
630 | return 0; | |
99214844 KS |
631 | } |
632 | ||
8cd2e972 | 633 | void udev_device_set_info_loaded(struct udev_device *device) |
99214844 | 634 | { |
912541b0 | 635 | device->info_loaded = true; |
99214844 KS |
636 | } |
637 | ||
a5710160 | 638 | struct udev_device *udev_device_new(struct udev *udev) |
eb1f0e66 | 639 | { |
912541b0 KS |
640 | struct udev_device *udev_device; |
641 | struct udev_list_entry *list_entry; | |
642 | ||
643 | if (udev == NULL) | |
644 | return NULL; | |
645 | ||
646 | udev_device = calloc(1, sizeof(struct udev_device)); | |
647 | if (udev_device == NULL) | |
648 | return NULL; | |
649 | udev_device->refcount = 1; | |
650 | udev_device->udev = udev; | |
651 | udev_list_init(udev, &udev_device->devlinks_list, true); | |
652 | udev_list_init(udev, &udev_device->properties_list, true); | |
653 | udev_list_init(udev, &udev_device->sysattr_value_list, true); | |
654 | udev_list_init(udev, &udev_device->sysattr_list, false); | |
655 | udev_list_init(udev, &udev_device->tags_list, true); | |
656 | udev_device->watch_handle = -1; | |
657 | /* copy global properties */ | |
658 | udev_list_entry_foreach(list_entry, udev_get_properties_list_entry(udev)) | |
659 | udev_device_add_property(udev_device, | |
660 | udev_list_entry_get_name(list_entry), | |
661 | udev_list_entry_get_value(list_entry)); | |
912541b0 | 662 | return udev_device; |
eb1f0e66 KS |
663 | } |
664 | ||
665 | /** | |
8753fadf | 666 | * udev_device_new_from_syspath: |
eb1f0e66 | 667 | * @udev: udev library context |
8753fadf | 668 | * @syspath: sys device path including sys directory |
eb1f0e66 | 669 | * |
8753fadf | 670 | * Create new udev device, and fill in information from the sys |
214a6c79 | 671 | * device and the udev database entry. The syspath is the absolute |
8753fadf | 672 | * path to the device, including the sys mount point. |
eb1f0e66 KS |
673 | * |
674 | * The initial refcount is 1, and needs to be decremented to | |
be7de409 | 675 | * release the resources of the udev device. |
eb1f0e66 KS |
676 | * |
677 | * Returns: a new udev device, or #NULL, if it does not exist | |
678 | **/ | |
54cf0b7f | 679 | _public_ struct udev_device *udev_device_new_from_syspath(struct udev *udev, const char *syspath) |
eb1f0e66 | 680 | { |
912541b0 KS |
681 | const char *subdir; |
682 | char path[UTIL_PATH_SIZE]; | |
683 | char *pos; | |
684 | struct stat statbuf; | |
685 | struct udev_device *udev_device; | |
686 | ||
687 | if (udev == NULL) | |
688 | return NULL; | |
689 | if (syspath == NULL) | |
690 | return NULL; | |
691 | ||
692 | /* path starts in sys */ | |
4cb72937 | 693 | if (!startswith(syspath, "/sys")) { |
c8f8394a | 694 | udev_dbg(udev, "not in sys :%s\n", syspath); |
912541b0 KS |
695 | return NULL; |
696 | } | |
697 | ||
698 | /* path is not a root directory */ | |
4cb72937 | 699 | subdir = syspath + strlen("/sys"); |
912541b0 | 700 | pos = strrchr(subdir, '/'); |
baa30fbc | 701 | if (pos == NULL || pos[1] == '\0' || pos < &subdir[2]) |
912541b0 | 702 | return NULL; |
912541b0 KS |
703 | |
704 | /* resolve possible symlink to real path */ | |
d5a89d7d | 705 | strscpy(path, sizeof(path), syspath); |
912541b0 KS |
706 | util_resolve_sys_link(udev, path, sizeof(path)); |
707 | ||
4cb72937 | 708 | if (startswith(path + strlen("/sys"), "/devices/")) { |
912541b0 KS |
709 | char file[UTIL_PATH_SIZE]; |
710 | ||
711 | /* all "devices" require a "uevent" file */ | |
d5a89d7d | 712 | strscpyl(file, sizeof(file), path, "/uevent", NULL); |
baa30fbc | 713 | if (stat(file, &statbuf) != 0) |
912541b0 | 714 | return NULL; |
912541b0 KS |
715 | } else { |
716 | /* everything else just needs to be a directory */ | |
baa30fbc | 717 | if (stat(path, &statbuf) != 0 || !S_ISDIR(statbuf.st_mode)) |
912541b0 | 718 | return NULL; |
912541b0 KS |
719 | } |
720 | ||
721 | udev_device = udev_device_new(udev); | |
722 | if (udev_device == NULL) | |
723 | return NULL; | |
724 | ||
725 | udev_device_set_syspath(udev_device, path); | |
c8f8394a | 726 | udev_dbg(udev, "device %p has devpath '%s'\n", udev_device, udev_device_get_devpath(udev_device)); |
912541b0 KS |
727 | |
728 | return udev_device; | |
eb1f0e66 KS |
729 | } |
730 | ||
1e511322 KS |
731 | /** |
732 | * udev_device_new_from_devnum: | |
733 | * @udev: udev library context | |
734 | * @type: char or block device | |
735 | * @devnum: device major/minor number | |
736 | * | |
737 | * Create new udev device, and fill in information from the sys | |
dbba7e40 KS |
738 | * device and the udev database entry. The device is looked-up |
739 | * by its major/minor number and type. Character and block device | |
740 | * numbers are not unique across the two types. | |
1e511322 KS |
741 | * |
742 | * The initial refcount is 1, and needs to be decremented to | |
743 | * release the resources of the udev device. | |
744 | * | |
745 | * Returns: a new udev device, or #NULL, if it does not exist | |
746 | **/ | |
54cf0b7f | 747 | _public_ struct udev_device *udev_device_new_from_devnum(struct udev *udev, char type, dev_t devnum) |
4c9dff47 | 748 | { |
912541b0 KS |
749 | char path[UTIL_PATH_SIZE]; |
750 | const char *type_str; | |
03198b93 | 751 | |
912541b0 KS |
752 | if (type == 'b') |
753 | type_str = "block"; | |
754 | else if (type == 'c') | |
755 | type_str = "char"; | |
756 | else | |
757 | return NULL; | |
4c9dff47 | 758 | |
912541b0 | 759 | /* use /sys/dev/{block,char}/<maj>:<min> link */ |
4cb72937 | 760 | snprintf(path, sizeof(path), "/sys/dev/%s/%u:%u", |
6ada823a | 761 | type_str, major(devnum), minor(devnum)); |
912541b0 | 762 | return udev_device_new_from_syspath(udev, path); |
4c9dff47 KS |
763 | } |
764 | ||
dbf61afb KS |
765 | /** |
766 | * udev_device_new_from_device_id: | |
767 | * @udev: udev library context | |
768 | * @id: text string identifying a kernel device | |
769 | * | |
770 | * Create new udev device, and fill in information from the sys | |
771 | * device and the udev database entry. The device is looked-up | |
772 | * by a special string: | |
773 | * b8:2 - block device major:minor | |
774 | * c128:1 - char device major:minor | |
775 | * n3 - network device ifindex | |
776 | * +sound:card29 - kernel driver core subsystem:device name | |
777 | * | |
778 | * The initial refcount is 1, and needs to be decremented to | |
779 | * release the resources of the udev device. | |
780 | * | |
781 | * Returns: a new udev device, or #NULL, if it does not exist | |
782 | **/ | |
67410e9f | 783 | _public_ struct udev_device *udev_device_new_from_device_id(struct udev *udev, const char *id) |
cad40a5f | 784 | { |
912541b0 KS |
785 | char type; |
786 | int maj, min; | |
787 | char subsys[UTIL_PATH_SIZE]; | |
788 | char *sysname; | |
789 | ||
790 | switch(id[0]) { | |
791 | case 'b': | |
792 | case 'c': | |
793 | if (sscanf(id, "%c%i:%i", &type, &maj, &min) != 3) | |
794 | return NULL; | |
795 | return udev_device_new_from_devnum(udev, type, makedev(maj, min)); | |
796 | case 'n': { | |
797 | int sk; | |
798 | struct ifreq ifr; | |
799 | struct udev_device *dev; | |
800 | int ifindex; | |
801 | ||
802 | ifindex = strtoul(&id[1], NULL, 10); | |
803 | if (ifindex <= 0) | |
804 | return NULL; | |
805 | ||
806 | sk = socket(PF_INET, SOCK_DGRAM, 0); | |
807 | if (sk < 0) | |
808 | return NULL; | |
809 | memset(&ifr, 0x00, sizeof(struct ifreq)); | |
810 | ifr.ifr_ifindex = ifindex; | |
811 | if (ioctl(sk, SIOCGIFNAME, &ifr) != 0) { | |
812 | close(sk); | |
813 | return NULL; | |
814 | } | |
815 | close(sk); | |
816 | ||
817 | dev = udev_device_new_from_subsystem_sysname(udev, "net", ifr.ifr_name); | |
818 | if (dev == NULL) | |
819 | return NULL; | |
820 | if (udev_device_get_ifindex(dev) == ifindex) | |
821 | return dev; | |
822 | udev_device_unref(dev); | |
823 | return NULL; | |
824 | } | |
825 | case '+': | |
d5a89d7d | 826 | strscpy(subsys, sizeof(subsys), &id[1]); |
912541b0 KS |
827 | sysname = strchr(subsys, ':'); |
828 | if (sysname == NULL) | |
829 | return NULL; | |
830 | sysname[0] = '\0'; | |
831 | sysname = &sysname[1]; | |
832 | return udev_device_new_from_subsystem_sysname(udev, subsys, sysname); | |
833 | default: | |
834 | return NULL; | |
835 | } | |
cad40a5f KS |
836 | } |
837 | ||
1e511322 KS |
838 | /** |
839 | * udev_device_new_from_subsystem_sysname: | |
840 | * @udev: udev library context | |
214a6c79 | 841 | * @subsystem: the subsystem of the device |
1e511322 KS |
842 | * @sysname: the name of the device |
843 | * | |
dbba7e40 KS |
844 | * Create new udev device, and fill in information from the sys device |
845 | * and the udev database entry. The device is looked up by the subsystem | |
846 | * and name string of the device, like "mem" / "zero", or "block" / "sda". | |
1e511322 KS |
847 | * |
848 | * The initial refcount is 1, and needs to be decremented to | |
849 | * release the resources of the udev device. | |
850 | * | |
851 | * Returns: a new udev device, or #NULL, if it does not exist | |
852 | **/ | |
54cf0b7f | 853 | _public_ struct udev_device *udev_device_new_from_subsystem_sysname(struct udev *udev, const char *subsystem, const char *sysname) |
90d80c2e | 854 | { |
6ada823a | 855 | char path[UTIL_PATH_SIZE]; |
912541b0 KS |
856 | struct stat statbuf; |
857 | ||
33502ffe | 858 | if (streq(subsystem, "subsystem")) { |
d5a89d7d | 859 | strscpyl(path, sizeof(path), "/sys/subsystem/", sysname, NULL); |
6ada823a | 860 | if (stat(path, &statbuf) == 0) |
912541b0 KS |
861 | goto found; |
862 | ||
d5a89d7d | 863 | strscpyl(path, sizeof(path), "/sys/bus/", sysname, NULL); |
6ada823a | 864 | if (stat(path, &statbuf) == 0) |
912541b0 KS |
865 | goto found; |
866 | ||
d5a89d7d | 867 | strscpyl(path, sizeof(path), "/sys/class/", sysname, NULL); |
6ada823a | 868 | if (stat(path, &statbuf) == 0) |
912541b0 KS |
869 | goto found; |
870 | goto out; | |
871 | } | |
872 | ||
33502ffe | 873 | if (streq(subsystem, "module")) { |
d5a89d7d | 874 | strscpyl(path, sizeof(path), "/sys/module/", sysname, NULL); |
6ada823a | 875 | if (stat(path, &statbuf) == 0) |
912541b0 KS |
876 | goto found; |
877 | goto out; | |
878 | } | |
879 | ||
33502ffe | 880 | if (streq(subsystem, "drivers")) { |
912541b0 KS |
881 | char subsys[UTIL_NAME_SIZE]; |
882 | char *driver; | |
883 | ||
d5a89d7d | 884 | strscpy(subsys, sizeof(subsys), sysname); |
912541b0 KS |
885 | driver = strchr(subsys, ':'); |
886 | if (driver != NULL) { | |
887 | driver[0] = '\0'; | |
888 | driver = &driver[1]; | |
889 | ||
d5a89d7d | 890 | strscpyl(path, sizeof(path), "/sys/subsystem/", subsys, "/drivers/", driver, NULL); |
6ada823a | 891 | if (stat(path, &statbuf) == 0) |
912541b0 KS |
892 | goto found; |
893 | ||
d5a89d7d | 894 | strscpyl(path, sizeof(path), "/sys/bus/", subsys, "/drivers/", driver, NULL); |
6ada823a | 895 | if (stat(path, &statbuf) == 0) |
912541b0 KS |
896 | goto found; |
897 | } | |
898 | goto out; | |
899 | } | |
900 | ||
d5a89d7d | 901 | strscpyl(path, sizeof(path), "/sys/subsystem/", subsystem, "/devices/", sysname, NULL); |
6ada823a | 902 | if (stat(path, &statbuf) == 0) |
912541b0 KS |
903 | goto found; |
904 | ||
d5a89d7d | 905 | strscpyl(path, sizeof(path), "/sys/bus/", subsystem, "/devices/", sysname, NULL); |
6ada823a | 906 | if (stat(path, &statbuf) == 0) |
912541b0 KS |
907 | goto found; |
908 | ||
d5a89d7d | 909 | strscpyl(path, sizeof(path), "/sys/class/", subsystem, "/", sysname, NULL); |
6ada823a | 910 | if (stat(path, &statbuf) == 0) |
912541b0 | 911 | goto found; |
90d80c2e | 912 | out: |
912541b0 | 913 | return NULL; |
90d80c2e | 914 | found: |
6ada823a | 915 | return udev_device_new_from_syspath(udev, path); |
90d80c2e KS |
916 | } |
917 | ||
fc8d61c5 KS |
918 | /** |
919 | * udev_device_new_from_environment | |
920 | * @udev: udev library context | |
921 | * | |
922 | * Create new udev device, and fill in information from the | |
923 | * current process environment. This only works reliable if | |
924 | * the process is called from a udev rule. It is usually used | |
925 | * for tools executed from IMPORT= rules. | |
926 | * | |
927 | * The initial refcount is 1, and needs to be decremented to | |
928 | * release the resources of the udev device. | |
929 | * | |
930 | * Returns: a new udev device, or #NULL, if it does not exist | |
931 | **/ | |
54cf0b7f | 932 | _public_ struct udev_device *udev_device_new_from_environment(struct udev *udev) |
fc8d61c5 | 933 | { |
912541b0 KS |
934 | int i; |
935 | struct udev_device *udev_device; | |
fc8d61c5 | 936 | |
912541b0 KS |
937 | udev_device = udev_device_new(udev); |
938 | if (udev_device == NULL) | |
939 | return NULL; | |
940 | udev_device_set_info_loaded(udev_device); | |
fc8d61c5 | 941 | |
912541b0 KS |
942 | for (i = 0; environ[i] != NULL; i++) |
943 | udev_device_add_property_from_string_parse(udev_device, environ[i]); | |
fc8d61c5 | 944 | |
912541b0 | 945 | if (udev_device_add_property_from_string_parse_finish(udev_device) < 0) { |
c8f8394a | 946 | udev_dbg(udev, "missing values, invalid device\n"); |
912541b0 KS |
947 | udev_device_unref(udev_device); |
948 | udev_device = NULL; | |
949 | } | |
fc8d61c5 | 950 | |
912541b0 | 951 | return udev_device; |
fc8d61c5 KS |
952 | } |
953 | ||
b2d9e4f2 | 954 | static struct udev_device *device_new_from_parent(struct udev_device *udev_device) |
4ad3a37f | 955 | { |
912541b0 KS |
956 | struct udev_device *udev_device_parent = NULL; |
957 | char path[UTIL_PATH_SIZE]; | |
958 | const char *subdir; | |
4ad3a37f | 959 | |
d5a89d7d | 960 | strscpy(path, sizeof(path), udev_device->syspath); |
4cb72937 | 961 | subdir = path + strlen("/sys/"); |
912541b0 KS |
962 | for (;;) { |
963 | char *pos; | |
b95f8a76 | 964 | |
912541b0 KS |
965 | pos = strrchr(subdir, '/'); |
966 | if (pos == NULL || pos < &subdir[2]) | |
967 | break; | |
968 | pos[0] = '\0'; | |
969 | udev_device_parent = udev_device_new_from_syspath(udev_device->udev, path); | |
970 | if (udev_device_parent != NULL) | |
971 | return udev_device_parent; | |
972 | } | |
973 | return NULL; | |
4ad3a37f KS |
974 | } |
975 | ||
1e511322 KS |
976 | /** |
977 | * udev_device_get_parent: | |
978 | * @udev_device: the device to start searching from | |
979 | * | |
980 | * Find the next parent device, and fill in information from the sys | |
981 | * device and the udev database entry. | |
982 | * | |
983 | * The returned the device is not referenced. It is attached to the | |
984 | * child device, and will be cleaned up when the child device | |
985 | * is cleaned up. | |
986 | * | |
214a6c79 | 987 | * It is not necessarily just the upper level directory, empty or not |
1e511322 KS |
988 | * recognized sys directories are ignored. |
989 | * | |
990 | * It can be called as many times as needed, without caring about | |
991 | * references. | |
992 | * | |
993 | * Returns: a new udev device, or #NULL, if it no parent exist. | |
994 | **/ | |
54cf0b7f | 995 | _public_ struct udev_device *udev_device_get_parent(struct udev_device *udev_device) |
b2d9e4f2 | 996 | { |
912541b0 KS |
997 | if (udev_device == NULL) |
998 | return NULL; | |
999 | if (!udev_device->parent_set) { | |
1000 | udev_device->parent_set = true; | |
1001 | udev_device->parent_device = device_new_from_parent(udev_device); | |
1002 | } | |
912541b0 | 1003 | return udev_device->parent_device; |
b2d9e4f2 KS |
1004 | } |
1005 | ||
1e511322 KS |
1006 | /** |
1007 | * udev_device_get_parent_with_subsystem_devtype: | |
1008 | * @udev_device: udev device to start searching from | |
214a6c79 | 1009 | * @subsystem: the subsystem of the device |
1e511322 KS |
1010 | * @devtype: the type (DEVTYPE) of the device |
1011 | * | |
1012 | * Find the next parent device, with a matching subsystem and devtype | |
1013 | * value, and fill in information from the sys device and the udev | |
1014 | * database entry. | |
1015 | * | |
79ef2e97 | 1016 | * If devtype is #NULL, only subsystem is checked, and any devtype will |
54d4f54e MP |
1017 | * match. |
1018 | * | |
1e511322 KS |
1019 | * The returned the device is not referenced. It is attached to the |
1020 | * child device, and will be cleaned up when the child device | |
1021 | * is cleaned up. | |
1022 | * | |
1023 | * It can be called as many times as needed, without caring about | |
1024 | * references. | |
1025 | * | |
8d6bc73a | 1026 | * Returns: a new udev device, or #NULL if no matching parent exists. |
1e511322 | 1027 | **/ |
54cf0b7f | 1028 | _public_ struct udev_device *udev_device_get_parent_with_subsystem_devtype(struct udev_device *udev_device, const char *subsystem, const char *devtype) |
bf8b2ae1 | 1029 | { |
912541b0 | 1030 | struct udev_device *parent; |
bf8b2ae1 | 1031 | |
912541b0 KS |
1032 | if (subsystem == NULL) |
1033 | return NULL; | |
883012d4 | 1034 | |
912541b0 KS |
1035 | parent = udev_device_get_parent(udev_device); |
1036 | while (parent != NULL) { | |
1037 | const char *parent_subsystem; | |
1038 | const char *parent_devtype; | |
bf8b2ae1 | 1039 | |
912541b0 | 1040 | parent_subsystem = udev_device_get_subsystem(parent); |
33502ffe | 1041 | if (parent_subsystem != NULL && streq(parent_subsystem, subsystem)) { |
912541b0 KS |
1042 | if (devtype == NULL) |
1043 | break; | |
1044 | parent_devtype = udev_device_get_devtype(parent); | |
33502ffe | 1045 | if (parent_devtype != NULL && streq(parent_devtype, devtype)) |
912541b0 KS |
1046 | break; |
1047 | } | |
1048 | parent = udev_device_get_parent(parent); | |
1049 | } | |
1050 | return parent; | |
bf8b2ae1 MH |
1051 | } |
1052 | ||
eb1f0e66 KS |
1053 | /** |
1054 | * udev_device_get_udev: | |
7d8787b3 | 1055 | * @udev_device: udev device |
eb1f0e66 KS |
1056 | * |
1057 | * Retrieve the udev library context the device was created with. | |
1058 | * | |
1059 | * Returns: the udev library context | |
1060 | **/ | |
54cf0b7f | 1061 | _public_ struct udev *udev_device_get_udev(struct udev_device *udev_device) |
eb1f0e66 | 1062 | { |
912541b0 KS |
1063 | if (udev_device == NULL) |
1064 | return NULL; | |
1065 | return udev_device->udev; | |
eb1f0e66 KS |
1066 | } |
1067 | ||
1068 | /** | |
1069 | * udev_device_ref: | |
1070 | * @udev_device: udev device | |
1071 | * | |
1072 | * Take a reference of a udev device. | |
1073 | * | |
1074 | * Returns: the passed udev device | |
1075 | **/ | |
54cf0b7f | 1076 | _public_ struct udev_device *udev_device_ref(struct udev_device *udev_device) |
eb1f0e66 | 1077 | { |
912541b0 KS |
1078 | if (udev_device == NULL) |
1079 | return NULL; | |
1080 | udev_device->refcount++; | |
1081 | return udev_device; | |
eb1f0e66 KS |
1082 | } |
1083 | ||
1084 | /** | |
1085 | * udev_device_unref: | |
1086 | * @udev_device: udev device | |
1087 | * | |
1088 | * Drop a reference of a udev device. If the refcount reaches zero, | |
be7de409 | 1089 | * the resources of the device will be released. |
eb1f0e66 | 1090 | * |
c1959569 | 1091 | * Returns: the passed udev device if it has still an active reference, or #NULL otherwise. |
eb1f0e66 | 1092 | **/ |
20bbd54f | 1093 | _public_ struct udev_device *udev_device_unref(struct udev_device *udev_device) |
eb1f0e66 | 1094 | { |
912541b0 | 1095 | if (udev_device == NULL) |
20bbd54f | 1096 | return NULL; |
912541b0 KS |
1097 | udev_device->refcount--; |
1098 | if (udev_device->refcount > 0) | |
20bbd54f | 1099 | return udev_device; |
912541b0 KS |
1100 | if (udev_device->parent_device != NULL) |
1101 | udev_device_unref(udev_device->parent_device); | |
1102 | free(udev_device->syspath); | |
1103 | free(udev_device->sysname); | |
1104 | free(udev_device->devnode); | |
1105 | free(udev_device->subsystem); | |
1106 | free(udev_device->devtype); | |
1107 | udev_list_cleanup(&udev_device->devlinks_list); | |
1108 | udev_list_cleanup(&udev_device->properties_list); | |
1109 | udev_list_cleanup(&udev_device->sysattr_value_list); | |
1110 | udev_list_cleanup(&udev_device->sysattr_list); | |
1111 | udev_list_cleanup(&udev_device->tags_list); | |
1112 | free(udev_device->action); | |
1113 | free(udev_device->driver); | |
1114 | free(udev_device->devpath_old); | |
1115 | free(udev_device->id_filename); | |
1116 | free(udev_device->envp); | |
1117 | free(udev_device->monitor_buf); | |
912541b0 | 1118 | free(udev_device); |
20bbd54f | 1119 | return NULL; |
eb1f0e66 KS |
1120 | } |
1121 | ||
1122 | /** | |
1123 | * udev_device_get_devpath: | |
1124 | * @udev_device: udev device | |
1125 | * | |
11d543c1 KS |
1126 | * Retrieve the kernel devpath value of the udev device. The path |
1127 | * does not contain the sys mount point, and starts with a '/'. | |
eb1f0e66 | 1128 | * |
11d543c1 | 1129 | * Returns: the devpath of the udev device |
eb1f0e66 | 1130 | **/ |
54cf0b7f | 1131 | _public_ const char *udev_device_get_devpath(struct udev_device *udev_device) |
eb1f0e66 | 1132 | { |
912541b0 KS |
1133 | if (udev_device == NULL) |
1134 | return NULL; | |
1135 | return udev_device->devpath; | |
eb1f0e66 KS |
1136 | } |
1137 | ||
11d543c1 KS |
1138 | /** |
1139 | * udev_device_get_syspath: | |
1140 | * @udev_device: udev device | |
1141 | * | |
1142 | * Retrieve the sys path of the udev device. The path is an | |
1143 | * absolute path and starts with the sys mount point. | |
1144 | * | |
1145 | * Returns: the sys path of the udev device | |
1146 | **/ | |
54cf0b7f | 1147 | _public_ const char *udev_device_get_syspath(struct udev_device *udev_device) |
11d543c1 | 1148 | { |
912541b0 KS |
1149 | if (udev_device == NULL) |
1150 | return NULL; | |
1151 | return udev_device->syspath; | |
11d543c1 KS |
1152 | } |
1153 | ||
1e511322 KS |
1154 | /** |
1155 | * udev_device_get_sysname: | |
1156 | * @udev_device: udev device | |
1157 | * | |
21dbe43a KS |
1158 | * Get the kernel device name in /sys. |
1159 | * | |
1160 | * Returns: the name string of the device device | |
1e511322 | 1161 | **/ |
54cf0b7f | 1162 | _public_ const char *udev_device_get_sysname(struct udev_device *udev_device) |
4ad3a37f | 1163 | { |
912541b0 KS |
1164 | if (udev_device == NULL) |
1165 | return NULL; | |
1166 | return udev_device->sysname; | |
4ad3a37f KS |
1167 | } |
1168 | ||
1e511322 KS |
1169 | /** |
1170 | * udev_device_get_sysnum: | |
1171 | * @udev_device: udev device | |
1172 | * | |
21dbe43a KS |
1173 | * Get the instance number of the device. |
1174 | * | |
c5315881 | 1175 | * Returns: the trailing number string of the device name |
1e511322 | 1176 | **/ |
54cf0b7f | 1177 | _public_ const char *udev_device_get_sysnum(struct udev_device *udev_device) |
517814e7 | 1178 | { |
912541b0 KS |
1179 | if (udev_device == NULL) |
1180 | return NULL; | |
1181 | return udev_device->sysnum; | |
517814e7 KS |
1182 | } |
1183 | ||
eb1f0e66 | 1184 | /** |
fb762bb9 | 1185 | * udev_device_get_devnode: |
eb1f0e66 KS |
1186 | * @udev_device: udev device |
1187 | * | |
1188 | * Retrieve the device node file name belonging to the udev device. | |
ba6929f6 | 1189 | * The path is an absolute path, and starts with the device directory. |
eb1f0e66 KS |
1190 | * |
1191 | * Returns: the device node file name of the udev device, or #NULL if no device node exists | |
1192 | **/ | |
54cf0b7f | 1193 | _public_ const char *udev_device_get_devnode(struct udev_device *udev_device) |
eb1f0e66 | 1194 | { |
912541b0 KS |
1195 | if (udev_device == NULL) |
1196 | return NULL; | |
1197 | if (udev_device->devnode != NULL) | |
1198 | return udev_device->devnode; | |
1199 | if (!udev_device->info_loaded) | |
1200 | udev_device_read_uevent_file(udev_device); | |
1201 | return udev_device->devnode; | |
eb1f0e66 KS |
1202 | } |
1203 | ||
eb1f0e66 | 1204 | /** |
0de33a61 | 1205 | * udev_device_get_devlinks_list_entry: |
eb1f0e66 | 1206 | * @udev_device: udev device |
eb1f0e66 | 1207 | * |
bf7ad0ea KS |
1208 | * Retrieve the list of device links pointing to the device file of |
1209 | * the udev device. The next list entry can be retrieved with | |
bb061708 | 1210 | * udev_list_entry_get_next(), which returns #NULL if no more entries exist. |
bf7ad0ea | 1211 | * The devlink path can be retrieved from the list entry by |
e345e267 | 1212 | * udev_list_entry_get_name(). The path is an absolute path, and starts with |
bf7ad0ea | 1213 | * the device directory. |
eb1f0e66 | 1214 | * |
bf7ad0ea | 1215 | * Returns: the first entry of the device node link list |
eb1f0e66 | 1216 | **/ |
54cf0b7f | 1217 | _public_ struct udev_list_entry *udev_device_get_devlinks_list_entry(struct udev_device *udev_device) |
eb1f0e66 | 1218 | { |
912541b0 KS |
1219 | if (udev_device == NULL) |
1220 | return NULL; | |
1221 | if (!udev_device->info_loaded) | |
1222 | udev_device_read_db(udev_device, NULL); | |
1223 | return udev_list_get_entry(&udev_device->devlinks_list); | |
eb1f0e66 KS |
1224 | } |
1225 | ||
979ff016 KS |
1226 | void udev_device_cleanup_devlinks_list(struct udev_device *udev_device) |
1227 | { | |
912541b0 KS |
1228 | udev_device->devlinks_uptodate = false; |
1229 | udev_list_cleanup(&udev_device->devlinks_list); | |
979ff016 KS |
1230 | } |
1231 | ||
eb1f0e66 | 1232 | /** |
0de33a61 | 1233 | * udev_device_get_properties_list_entry: |
eb1f0e66 | 1234 | * @udev_device: udev device |
eb1f0e66 | 1235 | * |
bf7ad0ea | 1236 | * Retrieve the list of key/value device properties of the udev |
bb061708 | 1237 | * device. The next list entry can be retrieved with udev_list_entry_get_next(), |
bf7ad0ea | 1238 | * which returns #NULL if no more entries exist. The property name |
bb061708 KS |
1239 | * can be retrieved from the list entry by udev_list_entry_get_name(), |
1240 | * the property value by udev_list_entry_get_value(). | |
eb1f0e66 | 1241 | * |
bf7ad0ea | 1242 | * Returns: the first entry of the property list |
eb1f0e66 | 1243 | **/ |
54cf0b7f | 1244 | _public_ struct udev_list_entry *udev_device_get_properties_list_entry(struct udev_device *udev_device) |
eb1f0e66 | 1245 | { |
912541b0 KS |
1246 | if (udev_device == NULL) |
1247 | return NULL; | |
1248 | if (!udev_device->info_loaded) { | |
1249 | udev_device_read_uevent_file(udev_device); | |
1250 | udev_device_read_db(udev_device, NULL); | |
1251 | } | |
1252 | if (!udev_device->devlinks_uptodate) { | |
1253 | char symlinks[UTIL_PATH_SIZE]; | |
1254 | struct udev_list_entry *list_entry; | |
1255 | ||
1256 | udev_device->devlinks_uptodate = true; | |
1257 | list_entry = udev_device_get_devlinks_list_entry(udev_device); | |
1258 | if (list_entry != NULL) { | |
1259 | char *s; | |
1260 | size_t l; | |
1261 | ||
1262 | s = symlinks; | |
d5a89d7d | 1263 | l = strpcpyl(&s, sizeof(symlinks), udev_list_entry_get_name(list_entry), NULL); |
912541b0 | 1264 | udev_list_entry_foreach(list_entry, udev_list_entry_get_next(list_entry)) |
d5a89d7d | 1265 | l = strpcpyl(&s, l, " ", udev_list_entry_get_name(list_entry), NULL); |
912541b0 KS |
1266 | udev_device_add_property(udev_device, "DEVLINKS", symlinks); |
1267 | } | |
1268 | } | |
1269 | if (!udev_device->tags_uptodate) { | |
1270 | udev_device->tags_uptodate = true; | |
1271 | if (udev_device_get_tags_list_entry(udev_device) != NULL) { | |
1272 | char tags[UTIL_PATH_SIZE]; | |
1273 | struct udev_list_entry *list_entry; | |
1274 | char *s; | |
1275 | size_t l; | |
1276 | ||
1277 | s = tags; | |
d5a89d7d | 1278 | l = strpcpyl(&s, sizeof(tags), ":", NULL); |
912541b0 | 1279 | udev_list_entry_foreach(list_entry, udev_device_get_tags_list_entry(udev_device)) |
d5a89d7d | 1280 | l = strpcpyl(&s, l, udev_list_entry_get_name(list_entry), ":", NULL); |
912541b0 KS |
1281 | udev_device_add_property(udev_device, "TAGS", tags); |
1282 | } | |
1283 | } | |
1284 | return udev_list_get_entry(&udev_device->properties_list); | |
eb1f0e66 | 1285 | } |
11d543c1 | 1286 | |
1e511322 KS |
1287 | /** |
1288 | * udev_device_get_action: | |
1289 | * @udev_device: udev device | |
1290 | * | |
1291 | * This is only valid if the device was received through a monitor. Devices read from | |
1292 | * sys do not have an action string. Usual actions are: add, remove, change, online, | |
1293 | * offline. | |
1294 | * | |
1295 | * Returns: the kernel action value, or #NULL if there is no action value available. | |
1296 | **/ | |
54cf0b7f | 1297 | _public_ const char *udev_device_get_action(struct udev_device *udev_device) |
c4f5f942 | 1298 | { |
912541b0 KS |
1299 | if (udev_device == NULL) |
1300 | return NULL; | |
1301 | return udev_device->action; | |
c4f5f942 KS |
1302 | } |
1303 | ||
9c6a11b1 KS |
1304 | /** |
1305 | * udev_device_get_usec_since_initialized: | |
1306 | * @udev_device: udev device | |
1307 | * | |
1308 | * Return the number of microseconds passed since udev set up the | |
1309 | * device for the first time. | |
1310 | * | |
1311 | * This is only implemented for devices with need to store properties | |
1312 | * in the udev database. All other devices return 0 here. | |
1313 | * | |
1314 | * Returns: the number of microseconds since the device was first seen. | |
1315 | **/ | |
54cf0b7f | 1316 | _public_ unsigned long long int udev_device_get_usec_since_initialized(struct udev_device *udev_device) |
9c6a11b1 | 1317 | { |
40fe8b11 | 1318 | usec_t now_ts; |
9c6a11b1 | 1319 | |
912541b0 KS |
1320 | if (udev_device == NULL) |
1321 | return 0; | |
1322 | if (!udev_device->info_loaded) | |
1323 | udev_device_read_db(udev_device, NULL); | |
1324 | if (udev_device->usec_initialized == 0) | |
1325 | return 0; | |
40fe8b11 | 1326 | now_ts = now(CLOCK_MONOTONIC); |
33502ffe | 1327 | if (now_ts == 0) |
912541b0 | 1328 | return 0; |
33502ffe | 1329 | return now_ts - udev_device->usec_initialized; |
9c6a11b1 KS |
1330 | } |
1331 | ||
40fe8b11 | 1332 | usec_t udev_device_get_usec_initialized(struct udev_device *udev_device) |
9c6a11b1 | 1333 | { |
912541b0 | 1334 | return udev_device->usec_initialized; |
9c6a11b1 KS |
1335 | } |
1336 | ||
40fe8b11 | 1337 | void udev_device_set_usec_initialized(struct udev_device *udev_device, usec_t usec_initialized) |
9c6a11b1 | 1338 | { |
912541b0 | 1339 | char num[32]; |
a20a57a7 | 1340 | |
912541b0 | 1341 | udev_device->usec_initialized = usec_initialized; |
40fe8b11 | 1342 | snprintf(num, sizeof(num), "%llu", (unsigned long long)usec_initialized); |
912541b0 | 1343 | udev_device_add_property(udev_device, "USEC_INITIALIZED", num); |
9c6a11b1 KS |
1344 | } |
1345 | ||
1e511322 KS |
1346 | /** |
1347 | * udev_device_get_sysattr_value: | |
1348 | * @udev_device: udev device | |
1349 | * @sysattr: attribute name | |
1350 | * | |
456719b6 | 1351 | * The retrieved value is cached in the device. Repeated calls will return the same |
1e511322 KS |
1352 | * value and not open the attribute again. |
1353 | * | |
1354 | * Returns: the content of a sys attribute file, or #NULL if there is no sys attribute value. | |
1355 | **/ | |
54cf0b7f | 1356 | _public_ const char *udev_device_get_sysattr_value(struct udev_device *udev_device, const char *sysattr) |
93b0f384 | 1357 | { |
912541b0 KS |
1358 | struct udev_list_entry *list_entry; |
1359 | char path[UTIL_PATH_SIZE]; | |
1360 | char value[4096]; | |
1361 | struct stat statbuf; | |
1362 | int fd; | |
1363 | ssize_t size; | |
1364 | const char *val = NULL; | |
1365 | ||
1366 | if (udev_device == NULL) | |
1367 | return NULL; | |
1368 | if (sysattr == NULL) | |
1369 | return NULL; | |
1370 | ||
1371 | /* look for possibly already cached result */ | |
1372 | list_entry = udev_list_get_entry(&udev_device->sysattr_value_list); | |
1373 | list_entry = udev_list_entry_get_by_name(list_entry, sysattr); | |
baa30fbc | 1374 | if (list_entry != NULL) |
912541b0 | 1375 | return udev_list_entry_get_value(list_entry); |
912541b0 | 1376 | |
d5a89d7d | 1377 | strscpyl(path, sizeof(path), udev_device_get_syspath(udev_device), "/", sysattr, NULL); |
912541b0 | 1378 | if (lstat(path, &statbuf) != 0) { |
912541b0 KS |
1379 | udev_list_entry_add(&udev_device->sysattr_value_list, sysattr, NULL); |
1380 | goto out; | |
1381 | } | |
1382 | ||
1383 | if (S_ISLNK(statbuf.st_mode)) { | |
912541b0 KS |
1384 | /* |
1385 | * Some core links return only the last element of the target path, | |
1386 | * these are just values, the paths should not be exposed. | |
1387 | */ | |
33502ffe KS |
1388 | if (streq(sysattr, "driver") || |
1389 | streq(sysattr, "subsystem") || | |
1390 | streq(sysattr, "module")) { | |
912541b0 KS |
1391 | if (util_get_sys_core_link_value(udev_device->udev, sysattr, |
1392 | udev_device->syspath, value, sizeof(value)) < 0) | |
1393 | return NULL; | |
912541b0 KS |
1394 | list_entry = udev_list_entry_add(&udev_device->sysattr_value_list, sysattr, value); |
1395 | val = udev_list_entry_get_value(list_entry); | |
1396 | goto out; | |
1397 | } | |
1398 | ||
912541b0 KS |
1399 | goto out; |
1400 | } | |
1401 | ||
1402 | /* skip directories */ | |
1403 | if (S_ISDIR(statbuf.st_mode)) | |
1404 | goto out; | |
1405 | ||
1406 | /* skip non-readable files */ | |
1407 | if ((statbuf.st_mode & S_IRUSR) == 0) | |
1408 | goto out; | |
1409 | ||
1410 | /* read attribute value */ | |
1411 | fd = open(path, O_RDONLY|O_CLOEXEC); | |
baa30fbc | 1412 | if (fd < 0) |
912541b0 | 1413 | goto out; |
912541b0 KS |
1414 | size = read(fd, value, sizeof(value)); |
1415 | close(fd); | |
1416 | if (size < 0) | |
1417 | goto out; | |
1418 | if (size == sizeof(value)) | |
1419 | goto out; | |
1420 | ||
1421 | /* got a valid value, store it in cache and return it */ | |
1422 | value[size] = '\0'; | |
1423 | util_remove_trailing_chars(value, '\n'); | |
912541b0 KS |
1424 | list_entry = udev_list_entry_add(&udev_device->sysattr_value_list, sysattr, value); |
1425 | val = udev_list_entry_get_value(list_entry); | |
93b0f384 | 1426 | out: |
912541b0 | 1427 | return val; |
93b0f384 | 1428 | } |
517814e7 | 1429 | |
946f1825 HR |
1430 | /** |
1431 | * udev_device_set_sysattr_value: | |
1432 | * @udev_device: udev device | |
1433 | * @sysattr: attribute name | |
1434 | * @value: new value to be set | |
1435 | * | |
1436 | * Update the contents of the sys attribute and the cached value of the device. | |
1437 | * | |
1438 | * Returns: Negative error code on failure or 0 on success. | |
1439 | **/ | |
1440 | _public_ int udev_device_set_sysattr_value(struct udev_device *udev_device, const char *sysattr, char *value) | |
1441 | { | |
1442 | struct udev_device *dev; | |
1443 | char path[UTIL_PATH_SIZE]; | |
1444 | struct stat statbuf; | |
1445 | int fd; | |
1446 | ssize_t size, value_len; | |
1447 | int ret = 0; | |
1448 | ||
1449 | if (udev_device == NULL) | |
1450 | return -EINVAL; | |
1451 | dev = udev_device; | |
1452 | if (sysattr == NULL) | |
1453 | return -EINVAL; | |
1454 | if (value == NULL) | |
1455 | value_len = 0; | |
1456 | else | |
1457 | value_len = strlen(value); | |
53726349 | 1458 | |
946f1825 HR |
1459 | strscpyl(path, sizeof(path), udev_device_get_syspath(dev), "/", sysattr, NULL); |
1460 | if (lstat(path, &statbuf) != 0) { | |
1461 | udev_list_entry_add(&dev->sysattr_value_list, sysattr, NULL); | |
1462 | ret = -ENXIO; | |
1463 | goto out; | |
1464 | } | |
1465 | ||
1466 | if (S_ISLNK(statbuf.st_mode)) { | |
53726349 | 1467 | ret = -EINVAL; |
946f1825 HR |
1468 | goto out; |
1469 | } | |
1470 | ||
1471 | /* skip directories */ | |
1472 | if (S_ISDIR(statbuf.st_mode)) { | |
1473 | ret = -EISDIR; | |
1474 | goto out; | |
1475 | } | |
1476 | ||
1477 | /* skip non-readable files */ | |
1478 | if ((statbuf.st_mode & S_IRUSR) == 0) { | |
1479 | ret = -EACCES; | |
1480 | goto out; | |
1481 | } | |
1482 | ||
1483 | /* Value is limited to 4k */ | |
1484 | if (value_len > 4096) { | |
1485 | ret = -EINVAL; | |
1486 | goto out; | |
1487 | } | |
1488 | util_remove_trailing_chars(value, '\n'); | |
1489 | ||
1490 | /* write attribute value */ | |
1491 | fd = open(path, O_WRONLY|O_CLOEXEC); | |
1492 | if (fd < 0) { | |
1493 | ret = -errno; | |
1494 | goto out; | |
1495 | } | |
1496 | size = write(fd, value, value_len); | |
1497 | close(fd); | |
1498 | if (size < 0) { | |
1499 | ret = -errno; | |
1500 | goto out; | |
1501 | } | |
1502 | if (size < value_len) { | |
1503 | ret = -EIO; | |
1504 | goto out; | |
1505 | } | |
1506 | ||
1507 | /* wrote a valid value, store it in cache and return it */ | |
1508 | udev_list_entry_add(&dev->sysattr_value_list, sysattr, value); | |
1509 | out: | |
1510 | if (dev != udev_device) | |
1511 | udev_device_unref(dev); | |
1512 | return ret; | |
1513 | } | |
1514 | ||
20bee04c | 1515 | static int udev_device_sysattr_list_read(struct udev_device *udev_device) |
f180ad25 | 1516 | { |
912541b0 KS |
1517 | struct dirent *dent; |
1518 | DIR *dir; | |
1519 | int num = 0; | |
f180ad25 | 1520 | |
912541b0 KS |
1521 | if (udev_device == NULL) |
1522 | return -1; | |
1523 | if (udev_device->sysattr_list_read) | |
1524 | return 0; | |
f180ad25 | 1525 | |
912541b0 | 1526 | dir = opendir(udev_device_get_syspath(udev_device)); |
baa30fbc | 1527 | if (!dir) |
912541b0 | 1528 | return -1; |
f180ad25 | 1529 | |
912541b0 KS |
1530 | for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) { |
1531 | char path[UTIL_PATH_SIZE]; | |
1532 | struct stat statbuf; | |
f180ad25 | 1533 | |
912541b0 KS |
1534 | /* only handle symlinks and regular files */ |
1535 | if (dent->d_type != DT_LNK && dent->d_type != DT_REG) | |
1536 | continue; | |
f180ad25 | 1537 | |
d5a89d7d | 1538 | strscpyl(path, sizeof(path), udev_device_get_syspath(udev_device), "/", dent->d_name, NULL); |
912541b0 KS |
1539 | if (lstat(path, &statbuf) != 0) |
1540 | continue; | |
1541 | if ((statbuf.st_mode & S_IRUSR) == 0) | |
1542 | continue; | |
f180ad25 | 1543 | |
912541b0 KS |
1544 | udev_list_entry_add(&udev_device->sysattr_list, dent->d_name, NULL); |
1545 | num++; | |
1546 | } | |
f180ad25 | 1547 | |
912541b0 | 1548 | closedir(dir); |
912541b0 | 1549 | udev_device->sysattr_list_read = true; |
f180ad25 | 1550 | |
912541b0 | 1551 | return num; |
f180ad25 TE |
1552 | } |
1553 | ||
1554 | /** | |
1555 | * udev_device_get_sysattr_list_entry: | |
1556 | * @udev_device: udev device | |
1557 | * | |
1558 | * Retrieve the list of available sysattrs, with value being empty; | |
20bee04c KS |
1559 | * This just return all available sysfs attributes for a particular |
1560 | * device without reading their values. | |
f180ad25 TE |
1561 | * |
1562 | * Returns: the first entry of the property list | |
1563 | **/ | |
54cf0b7f | 1564 | _public_ struct udev_list_entry *udev_device_get_sysattr_list_entry(struct udev_device *udev_device) |
f180ad25 | 1565 | { |
912541b0 KS |
1566 | if (!udev_device->sysattr_list_read) { |
1567 | int ret; | |
1568 | ret = udev_device_sysattr_list_read(udev_device); | |
1569 | if (0 > ret) | |
1570 | return NULL; | |
1571 | } | |
f180ad25 | 1572 | |
912541b0 | 1573 | return udev_list_get_entry(&udev_device->sysattr_list); |
f180ad25 TE |
1574 | } |
1575 | ||
8cd2e972 | 1576 | int udev_device_set_syspath(struct udev_device *udev_device, const char *syspath) |
11d543c1 | 1577 | { |
912541b0 KS |
1578 | const char *pos; |
1579 | size_t len; | |
8753fadf | 1580 | |
912541b0 KS |
1581 | free(udev_device->syspath); |
1582 | udev_device->syspath = strdup(syspath); | |
1583 | if (udev_device->syspath == NULL) | |
1584 | return -ENOMEM; | |
4cb72937 | 1585 | udev_device->devpath = udev_device->syspath + strlen("/sys"); |
912541b0 | 1586 | udev_device_add_property(udev_device, "DEVPATH", udev_device->devpath); |
517814e7 | 1587 | |
912541b0 KS |
1588 | pos = strrchr(udev_device->syspath, '/'); |
1589 | if (pos == NULL) | |
1590 | return -EINVAL; | |
1591 | udev_device->sysname = strdup(&pos[1]); | |
1592 | if (udev_device->sysname == NULL) | |
1593 | return -ENOMEM; | |
517814e7 | 1594 | |
912541b0 KS |
1595 | /* some devices have '!' in their name, change that to '/' */ |
1596 | len = 0; | |
1597 | while (udev_device->sysname[len] != '\0') { | |
1598 | if (udev_device->sysname[len] == '!') | |
1599 | udev_device->sysname[len] = '/'; | |
1600 | len++; | |
1601 | } | |
517814e7 | 1602 | |
912541b0 KS |
1603 | /* trailing number */ |
1604 | while (len > 0 && isdigit(udev_device->sysname[--len])) | |
1605 | udev_device->sysnum = &udev_device->sysname[len]; | |
babcf3cb | 1606 | |
912541b0 KS |
1607 | /* sysname is completely numeric */ |
1608 | if (len == 0) | |
1609 | udev_device->sysnum = NULL; | |
babcf3cb | 1610 | |
912541b0 | 1611 | return 0; |
11d543c1 KS |
1612 | } |
1613 | ||
8cd2e972 | 1614 | int udev_device_set_devnode(struct udev_device *udev_device, const char *devnode) |
11d543c1 | 1615 | { |
912541b0 KS |
1616 | free(udev_device->devnode); |
1617 | if (devnode[0] != '/') { | |
4cb72937 | 1618 | if (asprintf(&udev_device->devnode, "/dev/%s", devnode) < 0) |
912541b0 KS |
1619 | udev_device->devnode = NULL; |
1620 | } else { | |
1621 | udev_device->devnode = strdup(devnode); | |
1622 | } | |
1623 | if (udev_device->devnode == NULL) | |
1624 | return -ENOMEM; | |
1625 | udev_device_add_property(udev_device, "DEVNAME", udev_device->devnode); | |
1626 | return 0; | |
11d543c1 KS |
1627 | } |
1628 | ||
8a173387 | 1629 | int udev_device_add_devlink(struct udev_device *udev_device, const char *devlink) |
11d543c1 | 1630 | { |
912541b0 | 1631 | struct udev_list_entry *list_entry; |
6c29f2b9 | 1632 | |
912541b0 KS |
1633 | udev_device->devlinks_uptodate = false; |
1634 | list_entry = udev_list_entry_add(&udev_device->devlinks_list, devlink, NULL); | |
1635 | if (list_entry == NULL) | |
1636 | return -ENOMEM; | |
912541b0 | 1637 | return 0; |
11d543c1 KS |
1638 | } |
1639 | ||
4281da1f KS |
1640 | const char *udev_device_get_id_filename(struct udev_device *udev_device) |
1641 | { | |
912541b0 KS |
1642 | if (udev_device->id_filename == NULL) { |
1643 | if (udev_device_get_subsystem(udev_device) == NULL) | |
1644 | return NULL; | |
1645 | ||
1646 | if (major(udev_device_get_devnum(udev_device)) > 0) { | |
1647 | /* use dev_t -- b259:131072, c254:0 */ | |
1648 | if (asprintf(&udev_device->id_filename, "%c%u:%u", | |
33502ffe | 1649 | streq(udev_device_get_subsystem(udev_device), "block") ? 'b' : 'c', |
912541b0 KS |
1650 | major(udev_device_get_devnum(udev_device)), |
1651 | minor(udev_device_get_devnum(udev_device))) < 0) | |
1652 | udev_device->id_filename = NULL; | |
1653 | } else if (udev_device_get_ifindex(udev_device) > 0) { | |
1654 | /* use netdev ifindex -- n3 */ | |
1655 | if (asprintf(&udev_device->id_filename, "n%u", udev_device_get_ifindex(udev_device)) < 0) | |
1656 | udev_device->id_filename = NULL; | |
1657 | } else { | |
1658 | /* | |
1659 | * use $subsys:$syname -- pci:0000:00:1f.2 | |
1660 | * sysname() has '!' translated, get it from devpath | |
1661 | */ | |
1662 | const char *sysname; | |
1663 | sysname = strrchr(udev_device->devpath, '/'); | |
1664 | if (sysname == NULL) | |
1665 | return NULL; | |
1666 | sysname = &sysname[1]; | |
1667 | if (asprintf(&udev_device->id_filename, "+%s:%s", udev_device_get_subsystem(udev_device), sysname) < 0) | |
1668 | udev_device->id_filename = NULL; | |
1669 | } | |
1670 | } | |
1671 | return udev_device->id_filename; | |
4281da1f KS |
1672 | } |
1673 | ||
48a0170b KS |
1674 | /** |
1675 | * udev_device_get_is_initialized: | |
1676 | * @udev_device: udev device | |
1677 | * | |
1678 | * Check if udev has already handled the device and has set up | |
1679 | * device node permissions and context, or has renamed a network | |
1680 | * device. | |
1681 | * | |
9c6a11b1 | 1682 | * This is only implemented for devices with a device node |
48a0170b KS |
1683 | * or network interfaces. All other devices return 1 here. |
1684 | * | |
1685 | * Returns: 1 if the device is set up. 0 otherwise. | |
1686 | **/ | |
54cf0b7f | 1687 | _public_ int udev_device_get_is_initialized(struct udev_device *udev_device) |
48a0170b | 1688 | { |
912541b0 KS |
1689 | if (!udev_device->info_loaded) |
1690 | udev_device_read_db(udev_device, NULL); | |
1691 | return udev_device->is_initialized; | |
48a0170b KS |
1692 | } |
1693 | ||
1694 | void udev_device_set_is_initialized(struct udev_device *udev_device) | |
1695 | { | |
912541b0 | 1696 | udev_device->is_initialized = true; |
48a0170b KS |
1697 | } |
1698 | ||
28460195 KS |
1699 | int udev_device_add_tag(struct udev_device *udev_device, const char *tag) |
1700 | { | |
912541b0 KS |
1701 | if (strchr(tag, ':') != NULL || strchr(tag, ' ') != NULL) |
1702 | return -EINVAL; | |
1703 | udev_device->tags_uptodate = false; | |
1704 | if (udev_list_entry_add(&udev_device->tags_list, tag, NULL) != NULL) | |
1705 | return 0; | |
1706 | return -ENOMEM; | |
28460195 KS |
1707 | } |
1708 | ||
1709 | void udev_device_cleanup_tags_list(struct udev_device *udev_device) | |
1710 | { | |
912541b0 KS |
1711 | udev_device->tags_uptodate = false; |
1712 | udev_list_cleanup(&udev_device->tags_list); | |
28460195 KS |
1713 | } |
1714 | ||
f712894d KS |
1715 | /** |
1716 | * udev_device_get_tags_list_entry: | |
1717 | * @udev_device: udev device | |
1718 | * | |
1719 | * Retrieve the list of tags attached to the udev device. The next | |
bb061708 | 1720 | * list entry can be retrieved with udev_list_entry_get_next(), |
f712894d | 1721 | * which returns #NULL if no more entries exist. The tag string |
bb061708 | 1722 | * can be retrieved from the list entry by udev_list_entry_get_name(). |
f712894d KS |
1723 | * |
1724 | * Returns: the first entry of the tag list | |
1725 | **/ | |
54cf0b7f | 1726 | _public_ struct udev_list_entry *udev_device_get_tags_list_entry(struct udev_device *udev_device) |
28460195 | 1727 | { |
912541b0 KS |
1728 | if (udev_device == NULL) |
1729 | return NULL; | |
1730 | if (!udev_device->info_loaded) | |
1731 | udev_device_read_db(udev_device, NULL); | |
1732 | return udev_list_get_entry(&udev_device->tags_list); | |
28460195 KS |
1733 | } |
1734 | ||
21dbe43a KS |
1735 | /** |
1736 | * udev_device_has_tag: | |
1737 | * @udev_device: udev device | |
1738 | * @tag: tag name | |
1739 | * | |
1740 | * Check if a given device has a certain tag associated. | |
1741 | * | |
1742 | * Returns: 1 if the tag is found. 0 otherwise. | |
1743 | **/ | |
54cf0b7f | 1744 | _public_ int udev_device_has_tag(struct udev_device *udev_device, const char *tag) |
28460195 | 1745 | { |
912541b0 | 1746 | struct udev_list_entry *list_entry; |
28460195 | 1747 | |
912541b0 KS |
1748 | if (udev_device == NULL) |
1749 | return false; | |
1750 | if (!udev_device->info_loaded) | |
1751 | udev_device_read_db(udev_device, NULL); | |
1752 | list_entry = udev_device_get_tags_list_entry(udev_device); | |
1753 | if (udev_list_entry_get_by_name(list_entry, tag) != NULL) | |
1754 | return true; | |
1755 | return false; | |
28460195 KS |
1756 | } |
1757 | ||
912541b0 KS |
1758 | #define ENVP_SIZE 128 |
1759 | #define MONITOR_BUF_SIZE 4096 | |
6493e655 | 1760 | static int update_envp_monitor_buf(struct udev_device *udev_device) |
979ff016 | 1761 | { |
912541b0 KS |
1762 | struct udev_list_entry *list_entry; |
1763 | char *s; | |
1764 | size_t l; | |
1765 | unsigned int i; | |
1766 | ||
1767 | /* monitor buffer of property strings */ | |
1768 | free(udev_device->monitor_buf); | |
1769 | udev_device->monitor_buf_len = 0; | |
1770 | udev_device->monitor_buf = malloc(MONITOR_BUF_SIZE); | |
1771 | if (udev_device->monitor_buf == NULL) | |
1772 | return -ENOMEM; | |
1773 | ||
1774 | /* envp array, strings will point into monitor buffer */ | |
1775 | if (udev_device->envp == NULL) | |
1776 | udev_device->envp = malloc(sizeof(char *) * ENVP_SIZE); | |
1777 | if (udev_device->envp == NULL) | |
1778 | return -ENOMEM; | |
1779 | ||
1780 | i = 0; | |
1781 | s = udev_device->monitor_buf; | |
1782 | l = MONITOR_BUF_SIZE; | |
1783 | udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(udev_device)) { | |
1784 | const char *key; | |
1785 | ||
1786 | key = udev_list_entry_get_name(list_entry); | |
1787 | /* skip private variables */ | |
1788 | if (key[0] == '.') | |
1789 | continue; | |
1790 | ||
1791 | /* add string to envp array */ | |
1792 | udev_device->envp[i++] = s; | |
1793 | if (i+1 >= ENVP_SIZE) | |
1794 | return -EINVAL; | |
1795 | ||
1796 | /* add property string to monitor buffer */ | |
d5a89d7d | 1797 | l = strpcpyl(&s, l, key, "=", udev_list_entry_get_value(list_entry), NULL); |
912541b0 KS |
1798 | if (l == 0) |
1799 | return -EINVAL; | |
d5a89d7d | 1800 | /* advance past the trailing '\0' that strpcpyl() guarantees */ |
912541b0 KS |
1801 | s++; |
1802 | l--; | |
1803 | } | |
1804 | udev_device->envp[i] = NULL; | |
1805 | udev_device->monitor_buf_len = s - udev_device->monitor_buf; | |
1806 | udev_device->envp_uptodate = true; | |
912541b0 | 1807 | return 0; |
6493e655 KS |
1808 | } |
1809 | ||
1810 | char **udev_device_get_properties_envp(struct udev_device *udev_device) | |
1811 | { | |
912541b0 KS |
1812 | if (!udev_device->envp_uptodate) |
1813 | if (update_envp_monitor_buf(udev_device) != 0) | |
1814 | return NULL; | |
1815 | return udev_device->envp; | |
6493e655 KS |
1816 | } |
1817 | ||
1818 | ssize_t udev_device_get_properties_monitor_buf(struct udev_device *udev_device, const char **buf) | |
1819 | { | |
912541b0 KS |
1820 | if (!udev_device->envp_uptodate) |
1821 | if (update_envp_monitor_buf(udev_device) != 0) | |
1822 | return -EINVAL; | |
1823 | *buf = udev_device->monitor_buf; | |
1824 | return udev_device->monitor_buf_len; | |
c2654402 KS |
1825 | } |
1826 | ||
8cd2e972 | 1827 | int udev_device_set_action(struct udev_device *udev_device, const char *action) |
c4f5f942 | 1828 | { |
912541b0 KS |
1829 | free(udev_device->action); |
1830 | udev_device->action = strdup(action); | |
1831 | if (udev_device->action == NULL) | |
1832 | return -ENOMEM; | |
1833 | udev_device_add_property(udev_device, "ACTION", udev_device->action); | |
1834 | return 0; | |
c4f5f942 KS |
1835 | } |
1836 | ||
8cd2e972 | 1837 | int udev_device_get_devlink_priority(struct udev_device *udev_device) |
6bd1c78a | 1838 | { |
912541b0 KS |
1839 | if (!udev_device->info_loaded) |
1840 | udev_device_read_db(udev_device, NULL); | |
1841 | return udev_device->devlink_priority; | |
6bd1c78a KS |
1842 | } |
1843 | ||
8cd2e972 | 1844 | int udev_device_set_devlink_priority(struct udev_device *udev_device, int prio) |
6bd1c78a | 1845 | { |
912541b0 KS |
1846 | udev_device->devlink_priority = prio; |
1847 | return 0; | |
6bd1c78a KS |
1848 | } |
1849 | ||
d7ce7539 SJR |
1850 | int udev_device_get_watch_handle(struct udev_device *udev_device) |
1851 | { | |
912541b0 KS |
1852 | if (!udev_device->info_loaded) |
1853 | udev_device_read_db(udev_device, NULL); | |
1854 | return udev_device->watch_handle; | |
d7ce7539 SJR |
1855 | } |
1856 | ||
1857 | int udev_device_set_watch_handle(struct udev_device *udev_device, int handle) | |
1858 | { | |
912541b0 KS |
1859 | udev_device->watch_handle = handle; |
1860 | return 0; | |
d7ce7539 | 1861 | } |
fc416258 | 1862 | |
9ead6627 KS |
1863 | bool udev_device_get_db_persist(struct udev_device *udev_device) |
1864 | { | |
912541b0 | 1865 | return udev_device->db_persist; |
9ead6627 KS |
1866 | } |
1867 | ||
1868 | void udev_device_set_db_persist(struct udev_device *udev_device) | |
1869 | { | |
912541b0 | 1870 | udev_device->db_persist = true; |
9ead6627 | 1871 | } |