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eb1f0e66 KS |
1 | /* |
2 | * libudev - interface to udev device information | |
3 | * | |
fbb31cd6 | 4 | * Copyright (C) 2008-2010 Kay Sievers <kay.sievers@vrfy.org> |
eb1f0e66 | 5 | * |
4061ab9f KS |
6 | * This library is free software; you can redistribute it and/or |
7 | * modify it under the terms of the GNU Lesser General Public | |
8 | * License as published by the Free Software Foundation; either | |
9 | * version 2.1 of the License, or (at your option) any later version. | |
eb1f0e66 KS |
10 | */ |
11 | ||
eb1f0e66 KS |
12 | #include <stdio.h> |
13 | #include <stdlib.h> | |
14 | #include <stddef.h> | |
15 | #include <unistd.h> | |
fc8d61c5 | 16 | #include <stdbool.h> |
eb1f0e66 KS |
17 | #include <errno.h> |
18 | #include <string.h> | |
19 | #include <dirent.h> | |
93b0f384 | 20 | #include <fcntl.h> |
517814e7 | 21 | #include <ctype.h> |
3e0a2c9a | 22 | #include <net/if.h> |
eb1f0e66 | 23 | #include <sys/stat.h> |
3e0a2c9a KS |
24 | #include <sys/ioctl.h> |
25 | #include <sys/socket.h> | |
26 | #include <linux/sockios.h> | |
eb1f0e66 KS |
27 | |
28 | #include "libudev.h" | |
29 | #include "libudev-private.h" | |
eb1f0e66 | 30 | |
ce1d6d7f KS |
31 | /** |
32 | * SECTION:libudev-device | |
33 | * @short_description: kernel sys devices | |
34 | * | |
35 | * Representation of kernel sys devices. Devices are uniquely identified | |
36 | * by their syspath, every device has exactly one path in the kernel sys | |
37 | * filesystem. Devices usually belong to a kernel subsystem, and and have | |
214a6c79 | 38 | * a unique name inside that subsystem. |
ce1d6d7f KS |
39 | */ |
40 | ||
1e511322 KS |
41 | /** |
42 | * udev_device: | |
43 | * | |
ce1d6d7f | 44 | * Opaque object representing one kernel sys device. |
1e511322 | 45 | */ |
11d543c1 | 46 | struct udev_device { |
912541b0 KS |
47 | struct udev *udev; |
48 | struct udev_device *parent_device; | |
49 | char *syspath; | |
50 | const char *devpath; | |
51 | char *sysname; | |
52 | const char *sysnum; | |
53 | char *devnode; | |
54 | mode_t devnode_mode; | |
55 | char *subsystem; | |
56 | char *devtype; | |
57 | char *driver; | |
58 | char *action; | |
59 | char *devpath_old; | |
60 | char *id_filename; | |
61 | char **envp; | |
62 | char *monitor_buf; | |
63 | size_t monitor_buf_len; | |
64 | struct udev_list devlinks_list; | |
65 | struct udev_list properties_list; | |
66 | struct udev_list sysattr_value_list; | |
67 | struct udev_list sysattr_list; | |
68 | struct udev_list tags_list; | |
69 | unsigned long long int seqnum; | |
70 | unsigned long long int usec_initialized; | |
71 | int devlink_priority; | |
72 | int refcount; | |
73 | dev_t devnum; | |
74 | int ifindex; | |
75 | int watch_handle; | |
76 | int maj, min; | |
77 | bool parent_set; | |
78 | bool subsystem_set; | |
79 | bool devtype_set; | |
80 | bool devlinks_uptodate; | |
81 | bool envp_uptodate; | |
82 | bool tags_uptodate; | |
83 | bool driver_set; | |
84 | bool info_loaded; | |
85 | bool db_loaded; | |
86 | bool uevent_loaded; | |
87 | bool is_initialized; | |
88 | bool sysattr_list_read; | |
89 | bool db_persist; | |
11d543c1 KS |
90 | }; |
91 | ||
905555dc | 92 | /** |
a3321f68 | 93 | * udev_device_get_seqnum: |
905555dc KS |
94 | * @udev_device: udev device |
95 | * | |
96 | * This is only valid if the device was received through a monitor. Devices read from | |
97 | * sys do not have a sequence number. | |
98 | * | |
99 | * Returns: the kernel event sequence number, or 0 if there is no sequence number available. | |
100 | **/ | |
54cf0b7f | 101 | _public_ unsigned long long int udev_device_get_seqnum(struct udev_device *udev_device) |
905555dc | 102 | { |
912541b0 KS |
103 | if (udev_device == NULL) |
104 | return 0; | |
105 | return udev_device->seqnum; | |
905555dc KS |
106 | } |
107 | ||
108 | static int udev_device_set_seqnum(struct udev_device *udev_device, unsigned long long int seqnum) | |
109 | { | |
912541b0 | 110 | char num[32]; |
905555dc | 111 | |
912541b0 KS |
112 | udev_device->seqnum = seqnum; |
113 | snprintf(num, sizeof(num), "%llu", seqnum); | |
114 | udev_device_add_property(udev_device, "SEQNUM", num); | |
115 | return 0; | |
905555dc KS |
116 | } |
117 | ||
118 | int udev_device_get_ifindex(struct udev_device *udev_device) | |
119 | { | |
912541b0 KS |
120 | if (!udev_device->info_loaded) |
121 | udev_device_read_uevent_file(udev_device); | |
122 | return udev_device->ifindex; | |
905555dc KS |
123 | } |
124 | ||
125 | static int udev_device_set_ifindex(struct udev_device *udev_device, int ifindex) | |
126 | { | |
912541b0 | 127 | char num[32]; |
905555dc | 128 | |
912541b0 KS |
129 | udev_device->ifindex = ifindex; |
130 | snprintf(num, sizeof(num), "%u", ifindex); | |
131 | udev_device_add_property(udev_device, "IFINDEX", num); | |
132 | return 0; | |
905555dc KS |
133 | } |
134 | ||
135 | /** | |
136 | * udev_device_get_devnum: | |
137 | * @udev_device: udev device | |
138 | * | |
139 | * Returns: the device major/minor number. | |
140 | **/ | |
54cf0b7f | 141 | _public_ dev_t udev_device_get_devnum(struct udev_device *udev_device) |
905555dc | 142 | { |
912541b0 KS |
143 | if (udev_device == NULL) |
144 | return makedev(0, 0); | |
145 | if (!udev_device->info_loaded) | |
146 | udev_device_read_uevent_file(udev_device); | |
147 | return udev_device->devnum; | |
905555dc KS |
148 | } |
149 | ||
150 | static int udev_device_set_devnum(struct udev_device *udev_device, dev_t devnum) | |
151 | { | |
912541b0 | 152 | char num[32]; |
905555dc | 153 | |
912541b0 | 154 | udev_device->devnum = devnum; |
905555dc | 155 | |
912541b0 KS |
156 | snprintf(num, sizeof(num), "%u", major(devnum)); |
157 | udev_device_add_property(udev_device, "MAJOR", num); | |
158 | snprintf(num, sizeof(num), "%u", minor(devnum)); | |
159 | udev_device_add_property(udev_device, "MINOR", num); | |
160 | return 0; | |
905555dc KS |
161 | } |
162 | ||
905555dc KS |
163 | const char *udev_device_get_devpath_old(struct udev_device *udev_device) |
164 | { | |
912541b0 | 165 | return udev_device->devpath_old; |
905555dc KS |
166 | } |
167 | ||
168 | static int udev_device_set_devpath_old(struct udev_device *udev_device, const char *devpath_old) | |
169 | { | |
912541b0 | 170 | const char *pos; |
905555dc | 171 | |
912541b0 KS |
172 | free(udev_device->devpath_old); |
173 | udev_device->devpath_old = strdup(devpath_old); | |
174 | if (udev_device->devpath_old == NULL) | |
175 | return -ENOMEM; | |
176 | udev_device_add_property(udev_device, "DEVPATH_OLD", udev_device->devpath_old); | |
905555dc | 177 | |
912541b0 KS |
178 | pos = strrchr(udev_device->devpath_old, '/'); |
179 | if (pos == NULL) | |
180 | return -EINVAL; | |
181 | return 0; | |
905555dc KS |
182 | } |
183 | ||
184 | /** | |
185 | * udev_device_get_driver: | |
186 | * @udev_device: udev device | |
187 | * | |
188 | * Returns: the driver string, or #NULL if there is no driver attached. | |
189 | **/ | |
54cf0b7f | 190 | _public_ const char *udev_device_get_driver(struct udev_device *udev_device) |
905555dc | 191 | { |
912541b0 | 192 | char driver[UTIL_NAME_SIZE]; |
905555dc | 193 | |
912541b0 KS |
194 | if (udev_device == NULL) |
195 | return NULL; | |
196 | if (!udev_device->driver_set) { | |
197 | udev_device->driver_set = true; | |
198 | if (util_get_sys_core_link_value(udev_device->udev, "driver", udev_device->syspath, driver, sizeof(driver)) > 0) | |
199 | udev_device->driver = strdup(driver); | |
200 | } | |
201 | return udev_device->driver; | |
905555dc KS |
202 | } |
203 | ||
204 | static int udev_device_set_driver(struct udev_device *udev_device, const char *driver) | |
205 | { | |
912541b0 KS |
206 | free(udev_device->driver); |
207 | udev_device->driver = strdup(driver); | |
208 | if (udev_device->driver == NULL) | |
209 | return -ENOMEM; | |
210 | udev_device->driver_set = true; | |
211 | udev_device_add_property(udev_device, "DRIVER", udev_device->driver); | |
212 | return 0; | |
905555dc KS |
213 | } |
214 | ||
215 | /** | |
216 | * udev_device_get_devtype: | |
217 | * @udev_device: udev device | |
218 | * | |
219 | * Retrieve the devtype string of the udev device. | |
220 | * | |
221 | * Returns: the devtype name of the udev device, or #NULL if it can not be determined | |
222 | **/ | |
54cf0b7f | 223 | _public_ const char *udev_device_get_devtype(struct udev_device *udev_device) |
905555dc | 224 | { |
912541b0 KS |
225 | if (udev_device == NULL) |
226 | return NULL; | |
227 | if (!udev_device->devtype_set) { | |
228 | udev_device->devtype_set = true; | |
229 | udev_device_read_uevent_file(udev_device); | |
230 | } | |
231 | return udev_device->devtype; | |
905555dc KS |
232 | } |
233 | ||
234 | static int udev_device_set_devtype(struct udev_device *udev_device, const char *devtype) | |
235 | { | |
912541b0 KS |
236 | free(udev_device->devtype); |
237 | udev_device->devtype = strdup(devtype); | |
238 | if (udev_device->devtype == NULL) | |
239 | return -ENOMEM; | |
240 | udev_device->devtype_set = true; | |
241 | udev_device_add_property(udev_device, "DEVTYPE", udev_device->devtype); | |
242 | return 0; | |
905555dc KS |
243 | } |
244 | ||
245 | static int udev_device_set_subsystem(struct udev_device *udev_device, const char *subsystem) | |
246 | { | |
912541b0 KS |
247 | free(udev_device->subsystem); |
248 | udev_device->subsystem = strdup(subsystem); | |
249 | if (udev_device->subsystem == NULL) | |
250 | return -ENOMEM; | |
251 | udev_device->subsystem_set = true; | |
252 | udev_device_add_property(udev_device, "SUBSYSTEM", udev_device->subsystem); | |
253 | return 0; | |
905555dc KS |
254 | } |
255 | ||
256 | /** | |
257 | * udev_device_get_subsystem: | |
258 | * @udev_device: udev device | |
259 | * | |
260 | * Retrieve the subsystem string of the udev device. The string does not | |
261 | * contain any "/". | |
262 | * | |
263 | * Returns: the subsystem name of the udev device, or #NULL if it can not be determined | |
264 | **/ | |
54cf0b7f | 265 | _public_ const char *udev_device_get_subsystem(struct udev_device *udev_device) |
905555dc | 266 | { |
912541b0 KS |
267 | char subsystem[UTIL_NAME_SIZE]; |
268 | ||
269 | if (udev_device == NULL) | |
270 | return NULL; | |
271 | if (!udev_device->subsystem_set) { | |
272 | udev_device->subsystem_set = true; | |
273 | /* read "subsystem" link */ | |
274 | if (util_get_sys_core_link_value(udev_device->udev, "subsystem", udev_device->syspath, subsystem, sizeof(subsystem)) > 0) { | |
275 | udev_device_set_subsystem(udev_device, subsystem); | |
276 | return udev_device->subsystem; | |
277 | } | |
278 | /* implicit names */ | |
33502ffe | 279 | if (startswith(udev_device->devpath, "/module/")) { |
912541b0 KS |
280 | udev_device_set_subsystem(udev_device, "module"); |
281 | return udev_device->subsystem; | |
282 | } | |
283 | if (strstr(udev_device->devpath, "/drivers/") != NULL) { | |
284 | udev_device_set_subsystem(udev_device, "drivers"); | |
285 | return udev_device->subsystem; | |
286 | } | |
33502ffe KS |
287 | if (startswith(udev_device->devpath, "/subsystem/") || |
288 | startswith(udev_device->devpath, "/class/") || | |
289 | startswith(udev_device->devpath, "/bus/")) { | |
912541b0 KS |
290 | udev_device_set_subsystem(udev_device, "subsystem"); |
291 | return udev_device->subsystem; | |
292 | } | |
293 | } | |
294 | return udev_device->subsystem; | |
905555dc KS |
295 | } |
296 | ||
297 | mode_t udev_device_get_devnode_mode(struct udev_device *udev_device) | |
298 | { | |
912541b0 KS |
299 | if (!udev_device->info_loaded) |
300 | udev_device_read_uevent_file(udev_device); | |
301 | return udev_device->devnode_mode; | |
905555dc KS |
302 | } |
303 | ||
304 | static int udev_device_set_devnode_mode(struct udev_device *udev_device, mode_t mode) | |
305 | { | |
912541b0 | 306 | char num[32]; |
905555dc | 307 | |
912541b0 KS |
308 | udev_device->devnode_mode = mode; |
309 | snprintf(num, sizeof(num), "%#o", mode); | |
310 | udev_device_add_property(udev_device, "DEVMODE", num); | |
311 | return 0; | |
905555dc KS |
312 | } |
313 | ||
fc8d61c5 KS |
314 | struct udev_list_entry *udev_device_add_property(struct udev_device *udev_device, const char *key, const char *value) |
315 | { | |
912541b0 KS |
316 | udev_device->envp_uptodate = false; |
317 | if (value == NULL) { | |
318 | struct udev_list_entry *list_entry; | |
fc8d61c5 | 319 | |
912541b0 KS |
320 | list_entry = udev_device_get_properties_list_entry(udev_device); |
321 | list_entry = udev_list_entry_get_by_name(list_entry, key); | |
322 | if (list_entry != NULL) | |
323 | udev_list_entry_delete(list_entry); | |
324 | return NULL; | |
325 | } | |
326 | return udev_list_entry_add(&udev_device->properties_list, key, value); | |
fc8d61c5 KS |
327 | } |
328 | ||
329 | static struct udev_list_entry *udev_device_add_property_from_string(struct udev_device *udev_device, const char *property) | |
330 | { | |
912541b0 KS |
331 | char name[UTIL_LINE_SIZE]; |
332 | char *val; | |
fc8d61c5 | 333 | |
912541b0 KS |
334 | util_strscpy(name, sizeof(name), property); |
335 | val = strchr(name, '='); | |
336 | if (val == NULL) | |
337 | return NULL; | |
338 | val[0] = '\0'; | |
339 | val = &val[1]; | |
340 | if (val[0] == '\0') | |
341 | val = NULL; | |
342 | return udev_device_add_property(udev_device, name, val); | |
fc8d61c5 KS |
343 | } |
344 | ||
345 | /* | |
346 | * parse property string, and if needed, update internal values accordingly | |
347 | * | |
348 | * udev_device_add_property_from_string_parse_finish() needs to be | |
349 | * called after adding properties, and its return value checked | |
350 | * | |
351 | * udev_device_set_info_loaded() needs to be set, to avoid trying | |
352 | * to use a device without a DEVPATH set | |
353 | */ | |
354 | void udev_device_add_property_from_string_parse(struct udev_device *udev_device, const char *property) | |
355 | { | |
33502ffe | 356 | if (startswith(property, "DEVPATH=")) { |
912541b0 KS |
357 | char path[UTIL_PATH_SIZE]; |
358 | ||
6ada823a | 359 | util_strscpyl(path, sizeof(path), TEST_PREFIX "/sys", &property[8], NULL); |
912541b0 | 360 | udev_device_set_syspath(udev_device, path); |
33502ffe | 361 | } else if (startswith(property, "SUBSYSTEM=")) { |
912541b0 | 362 | udev_device_set_subsystem(udev_device, &property[10]); |
33502ffe | 363 | } else if (startswith(property, "DEVTYPE=")) { |
912541b0 | 364 | udev_device_set_devtype(udev_device, &property[8]); |
33502ffe | 365 | } else if (startswith(property, "DEVNAME=")) { |
912541b0 | 366 | udev_device_set_devnode(udev_device, &property[8]); |
33502ffe | 367 | } else if (startswith(property, "DEVLINKS=")) { |
912541b0 KS |
368 | char devlinks[UTIL_PATH_SIZE]; |
369 | char *slink; | |
370 | char *next; | |
371 | ||
372 | util_strscpy(devlinks, sizeof(devlinks), &property[9]); | |
373 | slink = devlinks; | |
374 | next = strchr(slink, ' '); | |
375 | while (next != NULL) { | |
376 | next[0] = '\0'; | |
377 | udev_device_add_devlink(udev_device, slink, 0); | |
378 | slink = &next[1]; | |
379 | next = strchr(slink, ' '); | |
380 | } | |
381 | if (slink[0] != '\0') | |
382 | udev_device_add_devlink(udev_device, slink, 0); | |
33502ffe | 383 | } else if (startswith(property, "TAGS=")) { |
912541b0 KS |
384 | char tags[UTIL_PATH_SIZE]; |
385 | char *next; | |
386 | ||
387 | util_strscpy(tags, sizeof(tags), &property[5]); | |
388 | next = strchr(tags, ':'); | |
389 | if (next != NULL) { | |
390 | next++; | |
391 | while (next[0] != '\0') { | |
392 | char *tag; | |
393 | ||
394 | tag = next; | |
395 | next = strchr(tag, ':'); | |
396 | if (next == NULL) | |
397 | break; | |
398 | next[0] = '\0'; | |
399 | next++; | |
400 | udev_device_add_tag(udev_device, tag); | |
401 | } | |
402 | } | |
33502ffe | 403 | } else if (startswith(property, "USEC_INITIALIZED=")) { |
912541b0 | 404 | udev_device_set_usec_initialized(udev_device, strtoull(&property[19], NULL, 10)); |
33502ffe | 405 | } else if (startswith(property, "DRIVER=")) { |
912541b0 | 406 | udev_device_set_driver(udev_device, &property[7]); |
33502ffe | 407 | } else if (startswith(property, "ACTION=")) { |
912541b0 | 408 | udev_device_set_action(udev_device, &property[7]); |
33502ffe | 409 | } else if (startswith(property, "MAJOR=")) { |
912541b0 | 410 | udev_device->maj = strtoull(&property[6], NULL, 10); |
33502ffe | 411 | } else if (startswith(property, "MINOR=")) { |
912541b0 | 412 | udev_device->min = strtoull(&property[6], NULL, 10); |
33502ffe | 413 | } else if (startswith(property, "DEVPATH_OLD=")) { |
912541b0 | 414 | udev_device_set_devpath_old(udev_device, &property[12]); |
33502ffe | 415 | } else if (startswith(property, "SEQNUM=")) { |
912541b0 | 416 | udev_device_set_seqnum(udev_device, strtoull(&property[7], NULL, 10)); |
33502ffe | 417 | } else if (startswith(property, "IFINDEX=")) { |
912541b0 | 418 | udev_device_set_ifindex(udev_device, strtoull(&property[8], NULL, 10)); |
33502ffe | 419 | } else if (startswith(property, "DEVMODE=")) { |
912541b0 KS |
420 | udev_device_set_devnode_mode(udev_device, strtoul(&property[8], NULL, 8)); |
421 | } else { | |
422 | udev_device_add_property_from_string(udev_device, property); | |
423 | } | |
fc8d61c5 KS |
424 | } |
425 | ||
426 | int udev_device_add_property_from_string_parse_finish(struct udev_device *udev_device) | |
427 | { | |
912541b0 KS |
428 | if (udev_device->maj > 0) |
429 | udev_device_set_devnum(udev_device, makedev(udev_device->maj, udev_device->min)); | |
430 | udev_device->maj = 0; | |
431 | udev_device->min = 0; | |
fc8d61c5 | 432 | |
912541b0 KS |
433 | if (udev_device->devpath == NULL || udev_device->subsystem == NULL) |
434 | return -EINVAL; | |
435 | return 0; | |
fc8d61c5 KS |
436 | } |
437 | ||
438 | /** | |
439 | * udev_device_get_property_value: | |
440 | * @udev_device: udev device | |
441 | * @key: property name | |
442 | * | |
443 | * Returns: the value of a device property, or #NULL if there is no such property. | |
444 | **/ | |
54cf0b7f | 445 | _public_ const char *udev_device_get_property_value(struct udev_device *udev_device, const char *key) |
fc8d61c5 | 446 | { |
912541b0 | 447 | struct udev_list_entry *list_entry; |
fc8d61c5 | 448 | |
912541b0 KS |
449 | if (udev_device == NULL) |
450 | return NULL; | |
451 | if (key == NULL) | |
452 | return NULL; | |
fc8d61c5 | 453 | |
912541b0 KS |
454 | list_entry = udev_device_get_properties_list_entry(udev_device); |
455 | list_entry = udev_list_entry_get_by_name(list_entry, key); | |
456 | return udev_list_entry_get_value(list_entry); | |
fc8d61c5 KS |
457 | } |
458 | ||
5f59fa09 | 459 | int udev_device_read_db(struct udev_device *udev_device, const char *dbfile) |
e88a82b5 | 460 | { |
912541b0 KS |
461 | char filename[UTIL_PATH_SIZE]; |
462 | char line[UTIL_LINE_SIZE]; | |
463 | FILE *f; | |
464 | ||
465 | /* providing a database file will always force-load it */ | |
466 | if (dbfile == NULL) { | |
467 | const char *id; | |
468 | ||
469 | if (udev_device->db_loaded) | |
470 | return 0; | |
471 | udev_device->db_loaded = true; | |
472 | ||
473 | id = udev_device_get_id_filename(udev_device); | |
474 | if (id == NULL) | |
475 | return -1; | |
6ada823a | 476 | util_strscpyl(filename, sizeof(filename), TEST_PREFIX "/run/udev/data/", id, NULL); |
912541b0 KS |
477 | dbfile = filename; |
478 | } | |
479 | ||
480 | f = fopen(dbfile, "re"); | |
481 | if (f == NULL) { | |
baa30fbc | 482 | dbg(udev_device->udev, "no db file to read %s: %m\n", dbfile); |
912541b0 KS |
483 | return -1; |
484 | } | |
485 | udev_device->is_initialized = true; | |
486 | ||
487 | while (fgets(line, sizeof(line), f)) { | |
488 | ssize_t len; | |
489 | const char *val; | |
490 | struct udev_list_entry *entry; | |
491 | ||
492 | len = strlen(line); | |
493 | if (len < 4) | |
494 | break; | |
495 | line[len-1] = '\0'; | |
496 | val = &line[2]; | |
497 | switch(line[0]) { | |
498 | case 'S': | |
6ada823a | 499 | util_strscpyl(filename, sizeof(filename), TEST_PREFIX "/dev/", val, NULL); |
912541b0 KS |
500 | udev_device_add_devlink(udev_device, filename, 0); |
501 | break; | |
502 | case 'L': | |
503 | udev_device_set_devlink_priority(udev_device, atoi(val)); | |
504 | break; | |
505 | case 'E': | |
506 | entry = udev_device_add_property_from_string(udev_device, val); | |
507 | udev_list_entry_set_num(entry, true); | |
508 | break; | |
509 | case 'G': | |
510 | udev_device_add_tag(udev_device, val); | |
511 | break; | |
512 | case 'W': | |
513 | udev_device_set_watch_handle(udev_device, atoi(val)); | |
514 | break; | |
515 | case 'I': | |
516 | udev_device_set_usec_initialized(udev_device, strtoull(val, NULL, 10)); | |
517 | break; | |
518 | } | |
519 | } | |
520 | fclose(f); | |
521 | ||
baa30fbc | 522 | dbg(udev_device->udev, "device %p filled with db file data\n", udev_device); |
912541b0 | 523 | return 0; |
e88a82b5 KS |
524 | } |
525 | ||
bd85566c | 526 | int udev_device_read_uevent_file(struct udev_device *udev_device) |
99214844 | 527 | { |
912541b0 KS |
528 | char filename[UTIL_PATH_SIZE]; |
529 | FILE *f; | |
530 | char line[UTIL_LINE_SIZE]; | |
531 | int maj = 0; | |
532 | int min = 0; | |
533 | ||
534 | if (udev_device->uevent_loaded) | |
535 | return 0; | |
536 | ||
537 | util_strscpyl(filename, sizeof(filename), udev_device->syspath, "/uevent", NULL); | |
538 | f = fopen(filename, "re"); | |
539 | if (f == NULL) | |
540 | return -1; | |
541 | udev_device->uevent_loaded = true; | |
542 | ||
543 | while (fgets(line, sizeof(line), f)) { | |
544 | char *pos; | |
545 | ||
546 | pos = strchr(line, '\n'); | |
547 | if (pos == NULL) | |
548 | continue; | |
549 | pos[0] = '\0'; | |
550 | ||
33502ffe | 551 | if (startswith(line, "DEVTYPE=")) { |
912541b0 | 552 | udev_device_set_devtype(udev_device, &line[8]); |
d2b795f2 KS |
553 | continue; |
554 | } | |
33502ffe | 555 | if (startswith(line, "IFINDEX=")) { |
d2b795f2 KS |
556 | udev_device_set_ifindex(udev_device, strtoull(&line[8], NULL, 10)); |
557 | continue; | |
558 | } | |
33502ffe | 559 | if (startswith(line, "DEVNAME=")) { |
d2b795f2 KS |
560 | udev_device_set_devnode(udev_device, &line[8]); |
561 | continue; | |
562 | } | |
563 | ||
33502ffe | 564 | if (startswith(line, "MAJOR=")) |
912541b0 | 565 | maj = strtoull(&line[6], NULL, 10); |
33502ffe | 566 | else if (startswith(line, "MINOR=")) |
912541b0 | 567 | min = strtoull(&line[6], NULL, 10); |
33502ffe | 568 | else if (startswith(line, "DEVMODE=")) |
912541b0 KS |
569 | udev_device->devnode_mode = strtoul(&line[8], NULL, 8); |
570 | ||
571 | udev_device_add_property_from_string(udev_device, line); | |
572 | } | |
573 | ||
574 | udev_device->devnum = makedev(maj, min); | |
575 | fclose(f); | |
576 | return 0; | |
99214844 KS |
577 | } |
578 | ||
8cd2e972 | 579 | void udev_device_set_info_loaded(struct udev_device *device) |
99214844 | 580 | { |
912541b0 | 581 | device->info_loaded = true; |
99214844 KS |
582 | } |
583 | ||
a5710160 | 584 | struct udev_device *udev_device_new(struct udev *udev) |
eb1f0e66 | 585 | { |
912541b0 KS |
586 | struct udev_device *udev_device; |
587 | struct udev_list_entry *list_entry; | |
588 | ||
589 | if (udev == NULL) | |
590 | return NULL; | |
591 | ||
592 | udev_device = calloc(1, sizeof(struct udev_device)); | |
593 | if (udev_device == NULL) | |
594 | return NULL; | |
595 | udev_device->refcount = 1; | |
596 | udev_device->udev = udev; | |
597 | udev_list_init(udev, &udev_device->devlinks_list, true); | |
598 | udev_list_init(udev, &udev_device->properties_list, true); | |
599 | udev_list_init(udev, &udev_device->sysattr_value_list, true); | |
600 | udev_list_init(udev, &udev_device->sysattr_list, false); | |
601 | udev_list_init(udev, &udev_device->tags_list, true); | |
602 | udev_device->watch_handle = -1; | |
603 | /* copy global properties */ | |
604 | udev_list_entry_foreach(list_entry, udev_get_properties_list_entry(udev)) | |
605 | udev_device_add_property(udev_device, | |
606 | udev_list_entry_get_name(list_entry), | |
607 | udev_list_entry_get_value(list_entry)); | |
912541b0 | 608 | return udev_device; |
eb1f0e66 KS |
609 | } |
610 | ||
611 | /** | |
8753fadf | 612 | * udev_device_new_from_syspath: |
eb1f0e66 | 613 | * @udev: udev library context |
8753fadf | 614 | * @syspath: sys device path including sys directory |
eb1f0e66 | 615 | * |
8753fadf | 616 | * Create new udev device, and fill in information from the sys |
214a6c79 | 617 | * device and the udev database entry. The syspath is the absolute |
8753fadf | 618 | * path to the device, including the sys mount point. |
eb1f0e66 KS |
619 | * |
620 | * The initial refcount is 1, and needs to be decremented to | |
be7de409 | 621 | * release the resources of the udev device. |
eb1f0e66 KS |
622 | * |
623 | * Returns: a new udev device, or #NULL, if it does not exist | |
624 | **/ | |
54cf0b7f | 625 | _public_ struct udev_device *udev_device_new_from_syspath(struct udev *udev, const char *syspath) |
eb1f0e66 | 626 | { |
912541b0 KS |
627 | const char *subdir; |
628 | char path[UTIL_PATH_SIZE]; | |
629 | char *pos; | |
630 | struct stat statbuf; | |
631 | struct udev_device *udev_device; | |
632 | ||
633 | if (udev == NULL) | |
634 | return NULL; | |
635 | if (syspath == NULL) | |
636 | return NULL; | |
637 | ||
638 | /* path starts in sys */ | |
33502ffe | 639 | if (!startswith(syspath, TEST_PREFIX "/sys")) { |
baa30fbc | 640 | dbg(udev, "not in sys :%s\n", syspath); |
912541b0 KS |
641 | return NULL; |
642 | } | |
643 | ||
644 | /* path is not a root directory */ | |
6ada823a | 645 | subdir = syspath + strlen(TEST_PREFIX "/sys"); |
912541b0 | 646 | pos = strrchr(subdir, '/'); |
baa30fbc | 647 | if (pos == NULL || pos[1] == '\0' || pos < &subdir[2]) |
912541b0 | 648 | return NULL; |
912541b0 KS |
649 | |
650 | /* resolve possible symlink to real path */ | |
651 | util_strscpy(path, sizeof(path), syspath); | |
652 | util_resolve_sys_link(udev, path, sizeof(path)); | |
653 | ||
33502ffe | 654 | if (startswith(path + strlen(TEST_PREFIX "/sys"), "/devices/")) { |
912541b0 KS |
655 | char file[UTIL_PATH_SIZE]; |
656 | ||
657 | /* all "devices" require a "uevent" file */ | |
658 | util_strscpyl(file, sizeof(file), path, "/uevent", NULL); | |
baa30fbc | 659 | if (stat(file, &statbuf) != 0) |
912541b0 | 660 | return NULL; |
912541b0 KS |
661 | } else { |
662 | /* everything else just needs to be a directory */ | |
baa30fbc | 663 | if (stat(path, &statbuf) != 0 || !S_ISDIR(statbuf.st_mode)) |
912541b0 | 664 | return NULL; |
912541b0 KS |
665 | } |
666 | ||
667 | udev_device = udev_device_new(udev); | |
668 | if (udev_device == NULL) | |
669 | return NULL; | |
670 | ||
671 | udev_device_set_syspath(udev_device, path); | |
baa30fbc | 672 | dbg(udev, "device %p has devpath '%s'\n", udev_device, udev_device_get_devpath(udev_device)); |
912541b0 KS |
673 | |
674 | return udev_device; | |
eb1f0e66 KS |
675 | } |
676 | ||
1e511322 KS |
677 | /** |
678 | * udev_device_new_from_devnum: | |
679 | * @udev: udev library context | |
680 | * @type: char or block device | |
681 | * @devnum: device major/minor number | |
682 | * | |
683 | * Create new udev device, and fill in information from the sys | |
dbba7e40 KS |
684 | * device and the udev database entry. The device is looked-up |
685 | * by its major/minor number and type. Character and block device | |
686 | * numbers are not unique across the two types. | |
1e511322 KS |
687 | * |
688 | * The initial refcount is 1, and needs to be decremented to | |
689 | * release the resources of the udev device. | |
690 | * | |
691 | * Returns: a new udev device, or #NULL, if it does not exist | |
692 | **/ | |
54cf0b7f | 693 | _public_ struct udev_device *udev_device_new_from_devnum(struct udev *udev, char type, dev_t devnum) |
4c9dff47 | 694 | { |
912541b0 KS |
695 | char path[UTIL_PATH_SIZE]; |
696 | const char *type_str; | |
03198b93 | 697 | |
912541b0 KS |
698 | if (type == 'b') |
699 | type_str = "block"; | |
700 | else if (type == 'c') | |
701 | type_str = "char"; | |
702 | else | |
703 | return NULL; | |
4c9dff47 | 704 | |
912541b0 | 705 | /* use /sys/dev/{block,char}/<maj>:<min> link */ |
6ada823a KS |
706 | snprintf(path, sizeof(path), TEST_PREFIX "/sys/dev/%s/%u:%u", |
707 | type_str, major(devnum), minor(devnum)); | |
912541b0 | 708 | return udev_device_new_from_syspath(udev, path); |
4c9dff47 KS |
709 | } |
710 | ||
cad40a5f KS |
711 | struct udev_device *udev_device_new_from_id_filename(struct udev *udev, char *id) |
712 | { | |
912541b0 KS |
713 | char type; |
714 | int maj, min; | |
715 | char subsys[UTIL_PATH_SIZE]; | |
716 | char *sysname; | |
717 | ||
718 | switch(id[0]) { | |
719 | case 'b': | |
720 | case 'c': | |
721 | if (sscanf(id, "%c%i:%i", &type, &maj, &min) != 3) | |
722 | return NULL; | |
723 | return udev_device_new_from_devnum(udev, type, makedev(maj, min)); | |
724 | case 'n': { | |
725 | int sk; | |
726 | struct ifreq ifr; | |
727 | struct udev_device *dev; | |
728 | int ifindex; | |
729 | ||
730 | ifindex = strtoul(&id[1], NULL, 10); | |
731 | if (ifindex <= 0) | |
732 | return NULL; | |
733 | ||
734 | sk = socket(PF_INET, SOCK_DGRAM, 0); | |
735 | if (sk < 0) | |
736 | return NULL; | |
737 | memset(&ifr, 0x00, sizeof(struct ifreq)); | |
738 | ifr.ifr_ifindex = ifindex; | |
739 | if (ioctl(sk, SIOCGIFNAME, &ifr) != 0) { | |
740 | close(sk); | |
741 | return NULL; | |
742 | } | |
743 | close(sk); | |
744 | ||
745 | dev = udev_device_new_from_subsystem_sysname(udev, "net", ifr.ifr_name); | |
746 | if (dev == NULL) | |
747 | return NULL; | |
748 | if (udev_device_get_ifindex(dev) == ifindex) | |
749 | return dev; | |
750 | udev_device_unref(dev); | |
751 | return NULL; | |
752 | } | |
753 | case '+': | |
754 | util_strscpy(subsys, sizeof(subsys), &id[1]); | |
755 | sysname = strchr(subsys, ':'); | |
756 | if (sysname == NULL) | |
757 | return NULL; | |
758 | sysname[0] = '\0'; | |
759 | sysname = &sysname[1]; | |
760 | return udev_device_new_from_subsystem_sysname(udev, subsys, sysname); | |
761 | default: | |
762 | return NULL; | |
763 | } | |
cad40a5f KS |
764 | } |
765 | ||
1e511322 KS |
766 | /** |
767 | * udev_device_new_from_subsystem_sysname: | |
768 | * @udev: udev library context | |
214a6c79 | 769 | * @subsystem: the subsystem of the device |
1e511322 KS |
770 | * @sysname: the name of the device |
771 | * | |
dbba7e40 KS |
772 | * Create new udev device, and fill in information from the sys device |
773 | * and the udev database entry. The device is looked up by the subsystem | |
774 | * and name string of the device, like "mem" / "zero", or "block" / "sda". | |
1e511322 KS |
775 | * |
776 | * The initial refcount is 1, and needs to be decremented to | |
777 | * release the resources of the udev device. | |
778 | * | |
779 | * Returns: a new udev device, or #NULL, if it does not exist | |
780 | **/ | |
54cf0b7f | 781 | _public_ struct udev_device *udev_device_new_from_subsystem_sysname(struct udev *udev, const char *subsystem, const char *sysname) |
90d80c2e | 782 | { |
6ada823a | 783 | char path[UTIL_PATH_SIZE]; |
912541b0 KS |
784 | struct stat statbuf; |
785 | ||
33502ffe | 786 | if (streq(subsystem, "subsystem")) { |
6ada823a KS |
787 | util_strscpyl(path, sizeof(path), TEST_PREFIX "/sys/subsystem/", sysname, NULL); |
788 | if (stat(path, &statbuf) == 0) | |
912541b0 KS |
789 | goto found; |
790 | ||
6ada823a KS |
791 | util_strscpyl(path, sizeof(path), TEST_PREFIX "/sys/bus/", sysname, NULL); |
792 | if (stat(path, &statbuf) == 0) | |
912541b0 KS |
793 | goto found; |
794 | ||
6ada823a KS |
795 | util_strscpyl(path, sizeof(path), TEST_PREFIX "/sys/class/", sysname, NULL); |
796 | if (stat(path, &statbuf) == 0) | |
912541b0 KS |
797 | goto found; |
798 | goto out; | |
799 | } | |
800 | ||
33502ffe | 801 | if (streq(subsystem, "module")) { |
6ada823a KS |
802 | util_strscpyl(path, sizeof(path), TEST_PREFIX "/sys/module/", sysname, NULL); |
803 | if (stat(path, &statbuf) == 0) | |
912541b0 KS |
804 | goto found; |
805 | goto out; | |
806 | } | |
807 | ||
33502ffe | 808 | if (streq(subsystem, "drivers")) { |
912541b0 KS |
809 | char subsys[UTIL_NAME_SIZE]; |
810 | char *driver; | |
811 | ||
812 | util_strscpy(subsys, sizeof(subsys), sysname); | |
813 | driver = strchr(subsys, ':'); | |
814 | if (driver != NULL) { | |
815 | driver[0] = '\0'; | |
816 | driver = &driver[1]; | |
817 | ||
6ada823a KS |
818 | util_strscpyl(path, sizeof(path), TEST_PREFIX "/sys/subsystem/", subsys, "/drivers/", driver, NULL); |
819 | if (stat(path, &statbuf) == 0) | |
912541b0 KS |
820 | goto found; |
821 | ||
6ada823a KS |
822 | util_strscpyl(path, sizeof(path), TEST_PREFIX "/sys/bus/", subsys, "/drivers/", driver, NULL); |
823 | if (stat(path, &statbuf) == 0) | |
912541b0 KS |
824 | goto found; |
825 | } | |
826 | goto out; | |
827 | } | |
828 | ||
6ada823a KS |
829 | util_strscpyl(path, sizeof(path), TEST_PREFIX "/sys/subsystem/", subsystem, "/devices/", sysname, NULL); |
830 | if (stat(path, &statbuf) == 0) | |
912541b0 KS |
831 | goto found; |
832 | ||
6ada823a KS |
833 | util_strscpyl(path, sizeof(path), TEST_PREFIX "/sys/bus/", subsystem, "/devices/", sysname, NULL); |
834 | if (stat(path, &statbuf) == 0) | |
912541b0 KS |
835 | goto found; |
836 | ||
6ada823a KS |
837 | util_strscpyl(path, sizeof(path), TEST_PREFIX "/sys/class/", subsystem, "/", sysname, NULL); |
838 | if (stat(path, &statbuf) == 0) | |
912541b0 | 839 | goto found; |
90d80c2e | 840 | out: |
912541b0 | 841 | return NULL; |
90d80c2e | 842 | found: |
6ada823a | 843 | return udev_device_new_from_syspath(udev, path); |
90d80c2e KS |
844 | } |
845 | ||
fc8d61c5 KS |
846 | /** |
847 | * udev_device_new_from_environment | |
848 | * @udev: udev library context | |
849 | * | |
850 | * Create new udev device, and fill in information from the | |
851 | * current process environment. This only works reliable if | |
852 | * the process is called from a udev rule. It is usually used | |
853 | * for tools executed from IMPORT= rules. | |
854 | * | |
855 | * The initial refcount is 1, and needs to be decremented to | |
856 | * release the resources of the udev device. | |
857 | * | |
858 | * Returns: a new udev device, or #NULL, if it does not exist | |
859 | **/ | |
54cf0b7f | 860 | _public_ struct udev_device *udev_device_new_from_environment(struct udev *udev) |
fc8d61c5 | 861 | { |
912541b0 KS |
862 | int i; |
863 | struct udev_device *udev_device; | |
fc8d61c5 | 864 | |
912541b0 KS |
865 | udev_device = udev_device_new(udev); |
866 | if (udev_device == NULL) | |
867 | return NULL; | |
868 | udev_device_set_info_loaded(udev_device); | |
fc8d61c5 | 869 | |
912541b0 KS |
870 | for (i = 0; environ[i] != NULL; i++) |
871 | udev_device_add_property_from_string_parse(udev_device, environ[i]); | |
fc8d61c5 | 872 | |
912541b0 | 873 | if (udev_device_add_property_from_string_parse_finish(udev_device) < 0) { |
baa30fbc | 874 | dbg(udev, "missing values, invalid device\n"); |
912541b0 KS |
875 | udev_device_unref(udev_device); |
876 | udev_device = NULL; | |
877 | } | |
fc8d61c5 | 878 | |
912541b0 | 879 | return udev_device; |
fc8d61c5 KS |
880 | } |
881 | ||
b2d9e4f2 | 882 | static struct udev_device *device_new_from_parent(struct udev_device *udev_device) |
4ad3a37f | 883 | { |
912541b0 KS |
884 | struct udev_device *udev_device_parent = NULL; |
885 | char path[UTIL_PATH_SIZE]; | |
886 | const char *subdir; | |
4ad3a37f | 887 | |
912541b0 | 888 | util_strscpy(path, sizeof(path), udev_device->syspath); |
6ada823a | 889 | subdir = path + strlen(TEST_PREFIX "/sys/"); |
912541b0 KS |
890 | for (;;) { |
891 | char *pos; | |
b95f8a76 | 892 | |
912541b0 KS |
893 | pos = strrchr(subdir, '/'); |
894 | if (pos == NULL || pos < &subdir[2]) | |
895 | break; | |
896 | pos[0] = '\0'; | |
897 | udev_device_parent = udev_device_new_from_syspath(udev_device->udev, path); | |
898 | if (udev_device_parent != NULL) | |
899 | return udev_device_parent; | |
900 | } | |
901 | return NULL; | |
4ad3a37f KS |
902 | } |
903 | ||
1e511322 KS |
904 | /** |
905 | * udev_device_get_parent: | |
906 | * @udev_device: the device to start searching from | |
907 | * | |
908 | * Find the next parent device, and fill in information from the sys | |
909 | * device and the udev database entry. | |
910 | * | |
911 | * The returned the device is not referenced. It is attached to the | |
912 | * child device, and will be cleaned up when the child device | |
913 | * is cleaned up. | |
914 | * | |
214a6c79 | 915 | * It is not necessarily just the upper level directory, empty or not |
1e511322 KS |
916 | * recognized sys directories are ignored. |
917 | * | |
918 | * It can be called as many times as needed, without caring about | |
919 | * references. | |
920 | * | |
921 | * Returns: a new udev device, or #NULL, if it no parent exist. | |
922 | **/ | |
54cf0b7f | 923 | _public_ struct udev_device *udev_device_get_parent(struct udev_device *udev_device) |
b2d9e4f2 | 924 | { |
912541b0 KS |
925 | if (udev_device == NULL) |
926 | return NULL; | |
927 | if (!udev_device->parent_set) { | |
928 | udev_device->parent_set = true; | |
929 | udev_device->parent_device = device_new_from_parent(udev_device); | |
930 | } | |
912541b0 | 931 | return udev_device->parent_device; |
b2d9e4f2 KS |
932 | } |
933 | ||
1e511322 KS |
934 | /** |
935 | * udev_device_get_parent_with_subsystem_devtype: | |
936 | * @udev_device: udev device to start searching from | |
214a6c79 | 937 | * @subsystem: the subsystem of the device |
1e511322 KS |
938 | * @devtype: the type (DEVTYPE) of the device |
939 | * | |
940 | * Find the next parent device, with a matching subsystem and devtype | |
941 | * value, and fill in information from the sys device and the udev | |
942 | * database entry. | |
943 | * | |
79ef2e97 | 944 | * If devtype is #NULL, only subsystem is checked, and any devtype will |
54d4f54e MP |
945 | * match. |
946 | * | |
1e511322 KS |
947 | * The returned the device is not referenced. It is attached to the |
948 | * child device, and will be cleaned up when the child device | |
949 | * is cleaned up. | |
950 | * | |
951 | * It can be called as many times as needed, without caring about | |
952 | * references. | |
953 | * | |
8d6bc73a | 954 | * Returns: a new udev device, or #NULL if no matching parent exists. |
1e511322 | 955 | **/ |
54cf0b7f | 956 | _public_ struct udev_device *udev_device_get_parent_with_subsystem_devtype(struct udev_device *udev_device, const char *subsystem, const char *devtype) |
bf8b2ae1 | 957 | { |
912541b0 | 958 | struct udev_device *parent; |
bf8b2ae1 | 959 | |
912541b0 KS |
960 | if (subsystem == NULL) |
961 | return NULL; | |
883012d4 | 962 | |
912541b0 KS |
963 | parent = udev_device_get_parent(udev_device); |
964 | while (parent != NULL) { | |
965 | const char *parent_subsystem; | |
966 | const char *parent_devtype; | |
bf8b2ae1 | 967 | |
912541b0 | 968 | parent_subsystem = udev_device_get_subsystem(parent); |
33502ffe | 969 | if (parent_subsystem != NULL && streq(parent_subsystem, subsystem)) { |
912541b0 KS |
970 | if (devtype == NULL) |
971 | break; | |
972 | parent_devtype = udev_device_get_devtype(parent); | |
33502ffe | 973 | if (parent_devtype != NULL && streq(parent_devtype, devtype)) |
912541b0 KS |
974 | break; |
975 | } | |
976 | parent = udev_device_get_parent(parent); | |
977 | } | |
978 | return parent; | |
bf8b2ae1 MH |
979 | } |
980 | ||
eb1f0e66 KS |
981 | /** |
982 | * udev_device_get_udev: | |
7d8787b3 | 983 | * @udev_device: udev device |
eb1f0e66 KS |
984 | * |
985 | * Retrieve the udev library context the device was created with. | |
986 | * | |
987 | * Returns: the udev library context | |
988 | **/ | |
54cf0b7f | 989 | _public_ struct udev *udev_device_get_udev(struct udev_device *udev_device) |
eb1f0e66 | 990 | { |
912541b0 KS |
991 | if (udev_device == NULL) |
992 | return NULL; | |
993 | return udev_device->udev; | |
eb1f0e66 KS |
994 | } |
995 | ||
996 | /** | |
997 | * udev_device_ref: | |
998 | * @udev_device: udev device | |
999 | * | |
1000 | * Take a reference of a udev device. | |
1001 | * | |
1002 | * Returns: the passed udev device | |
1003 | **/ | |
54cf0b7f | 1004 | _public_ struct udev_device *udev_device_ref(struct udev_device *udev_device) |
eb1f0e66 | 1005 | { |
912541b0 KS |
1006 | if (udev_device == NULL) |
1007 | return NULL; | |
1008 | udev_device->refcount++; | |
1009 | return udev_device; | |
eb1f0e66 KS |
1010 | } |
1011 | ||
1012 | /** | |
1013 | * udev_device_unref: | |
1014 | * @udev_device: udev device | |
1015 | * | |
1016 | * Drop a reference of a udev device. If the refcount reaches zero, | |
be7de409 | 1017 | * the resources of the device will be released. |
eb1f0e66 KS |
1018 | * |
1019 | **/ | |
54cf0b7f | 1020 | _public_ void udev_device_unref(struct udev_device *udev_device) |
eb1f0e66 | 1021 | { |
912541b0 KS |
1022 | if (udev_device == NULL) |
1023 | return; | |
1024 | udev_device->refcount--; | |
1025 | if (udev_device->refcount > 0) | |
1026 | return; | |
1027 | if (udev_device->parent_device != NULL) | |
1028 | udev_device_unref(udev_device->parent_device); | |
1029 | free(udev_device->syspath); | |
1030 | free(udev_device->sysname); | |
1031 | free(udev_device->devnode); | |
1032 | free(udev_device->subsystem); | |
1033 | free(udev_device->devtype); | |
1034 | udev_list_cleanup(&udev_device->devlinks_list); | |
1035 | udev_list_cleanup(&udev_device->properties_list); | |
1036 | udev_list_cleanup(&udev_device->sysattr_value_list); | |
1037 | udev_list_cleanup(&udev_device->sysattr_list); | |
1038 | udev_list_cleanup(&udev_device->tags_list); | |
1039 | free(udev_device->action); | |
1040 | free(udev_device->driver); | |
1041 | free(udev_device->devpath_old); | |
1042 | free(udev_device->id_filename); | |
1043 | free(udev_device->envp); | |
1044 | free(udev_device->monitor_buf); | |
912541b0 | 1045 | free(udev_device); |
eb1f0e66 KS |
1046 | } |
1047 | ||
1048 | /** | |
1049 | * udev_device_get_devpath: | |
1050 | * @udev_device: udev device | |
1051 | * | |
11d543c1 KS |
1052 | * Retrieve the kernel devpath value of the udev device. The path |
1053 | * does not contain the sys mount point, and starts with a '/'. | |
eb1f0e66 | 1054 | * |
11d543c1 | 1055 | * Returns: the devpath of the udev device |
eb1f0e66 | 1056 | **/ |
54cf0b7f | 1057 | _public_ const char *udev_device_get_devpath(struct udev_device *udev_device) |
eb1f0e66 | 1058 | { |
912541b0 KS |
1059 | if (udev_device == NULL) |
1060 | return NULL; | |
1061 | return udev_device->devpath; | |
eb1f0e66 KS |
1062 | } |
1063 | ||
11d543c1 KS |
1064 | /** |
1065 | * udev_device_get_syspath: | |
1066 | * @udev_device: udev device | |
1067 | * | |
1068 | * Retrieve the sys path of the udev device. The path is an | |
1069 | * absolute path and starts with the sys mount point. | |
1070 | * | |
1071 | * Returns: the sys path of the udev device | |
1072 | **/ | |
54cf0b7f | 1073 | _public_ const char *udev_device_get_syspath(struct udev_device *udev_device) |
11d543c1 | 1074 | { |
912541b0 KS |
1075 | if (udev_device == NULL) |
1076 | return NULL; | |
1077 | return udev_device->syspath; | |
11d543c1 KS |
1078 | } |
1079 | ||
1e511322 KS |
1080 | /** |
1081 | * udev_device_get_sysname: | |
1082 | * @udev_device: udev device | |
1083 | * | |
1084 | * Returns: the sys name of the device device | |
1085 | **/ | |
54cf0b7f | 1086 | _public_ const char *udev_device_get_sysname(struct udev_device *udev_device) |
4ad3a37f | 1087 | { |
912541b0 KS |
1088 | if (udev_device == NULL) |
1089 | return NULL; | |
1090 | return udev_device->sysname; | |
4ad3a37f KS |
1091 | } |
1092 | ||
1e511322 KS |
1093 | /** |
1094 | * udev_device_get_sysnum: | |
1095 | * @udev_device: udev device | |
1096 | * | |
1097 | * Returns: the trailing number of of the device name | |
1098 | **/ | |
54cf0b7f | 1099 | _public_ const char *udev_device_get_sysnum(struct udev_device *udev_device) |
517814e7 | 1100 | { |
912541b0 KS |
1101 | if (udev_device == NULL) |
1102 | return NULL; | |
1103 | return udev_device->sysnum; | |
517814e7 KS |
1104 | } |
1105 | ||
eb1f0e66 | 1106 | /** |
fb762bb9 | 1107 | * udev_device_get_devnode: |
eb1f0e66 KS |
1108 | * @udev_device: udev device |
1109 | * | |
1110 | * Retrieve the device node file name belonging to the udev device. | |
ba6929f6 | 1111 | * The path is an absolute path, and starts with the device directory. |
eb1f0e66 KS |
1112 | * |
1113 | * Returns: the device node file name of the udev device, or #NULL if no device node exists | |
1114 | **/ | |
54cf0b7f | 1115 | _public_ const char *udev_device_get_devnode(struct udev_device *udev_device) |
eb1f0e66 | 1116 | { |
912541b0 KS |
1117 | if (udev_device == NULL) |
1118 | return NULL; | |
1119 | if (udev_device->devnode != NULL) | |
1120 | return udev_device->devnode; | |
1121 | if (!udev_device->info_loaded) | |
1122 | udev_device_read_uevent_file(udev_device); | |
1123 | return udev_device->devnode; | |
eb1f0e66 KS |
1124 | } |
1125 | ||
eb1f0e66 | 1126 | /** |
0de33a61 | 1127 | * udev_device_get_devlinks_list_entry: |
eb1f0e66 | 1128 | * @udev_device: udev device |
eb1f0e66 | 1129 | * |
bf7ad0ea KS |
1130 | * Retrieve the list of device links pointing to the device file of |
1131 | * the udev device. The next list entry can be retrieved with | |
bb061708 | 1132 | * udev_list_entry_get_next(), which returns #NULL if no more entries exist. |
bf7ad0ea | 1133 | * The devlink path can be retrieved from the list entry by |
e345e267 | 1134 | * udev_list_entry_get_name(). The path is an absolute path, and starts with |
bf7ad0ea | 1135 | * the device directory. |
eb1f0e66 | 1136 | * |
bf7ad0ea | 1137 | * Returns: the first entry of the device node link list |
eb1f0e66 | 1138 | **/ |
54cf0b7f | 1139 | _public_ struct udev_list_entry *udev_device_get_devlinks_list_entry(struct udev_device *udev_device) |
eb1f0e66 | 1140 | { |
912541b0 KS |
1141 | if (udev_device == NULL) |
1142 | return NULL; | |
1143 | if (!udev_device->info_loaded) | |
1144 | udev_device_read_db(udev_device, NULL); | |
1145 | return udev_list_get_entry(&udev_device->devlinks_list); | |
eb1f0e66 KS |
1146 | } |
1147 | ||
979ff016 KS |
1148 | void udev_device_cleanup_devlinks_list(struct udev_device *udev_device) |
1149 | { | |
912541b0 KS |
1150 | udev_device->devlinks_uptodate = false; |
1151 | udev_list_cleanup(&udev_device->devlinks_list); | |
979ff016 KS |
1152 | } |
1153 | ||
eb1f0e66 | 1154 | /** |
0de33a61 | 1155 | * udev_device_get_properties_list_entry: |
eb1f0e66 | 1156 | * @udev_device: udev device |
eb1f0e66 | 1157 | * |
bf7ad0ea | 1158 | * Retrieve the list of key/value device properties of the udev |
bb061708 | 1159 | * device. The next list entry can be retrieved with udev_list_entry_get_next(), |
bf7ad0ea | 1160 | * which returns #NULL if no more entries exist. The property name |
bb061708 KS |
1161 | * can be retrieved from the list entry by udev_list_entry_get_name(), |
1162 | * the property value by udev_list_entry_get_value(). | |
eb1f0e66 | 1163 | * |
bf7ad0ea | 1164 | * Returns: the first entry of the property list |
eb1f0e66 | 1165 | **/ |
54cf0b7f | 1166 | _public_ struct udev_list_entry *udev_device_get_properties_list_entry(struct udev_device *udev_device) |
eb1f0e66 | 1167 | { |
912541b0 KS |
1168 | if (udev_device == NULL) |
1169 | return NULL; | |
1170 | if (!udev_device->info_loaded) { | |
1171 | udev_device_read_uevent_file(udev_device); | |
1172 | udev_device_read_db(udev_device, NULL); | |
1173 | } | |
1174 | if (!udev_device->devlinks_uptodate) { | |
1175 | char symlinks[UTIL_PATH_SIZE]; | |
1176 | struct udev_list_entry *list_entry; | |
1177 | ||
1178 | udev_device->devlinks_uptodate = true; | |
1179 | list_entry = udev_device_get_devlinks_list_entry(udev_device); | |
1180 | if (list_entry != NULL) { | |
1181 | char *s; | |
1182 | size_t l; | |
1183 | ||
1184 | s = symlinks; | |
1185 | l = util_strpcpyl(&s, sizeof(symlinks), udev_list_entry_get_name(list_entry), NULL); | |
1186 | udev_list_entry_foreach(list_entry, udev_list_entry_get_next(list_entry)) | |
1187 | l = util_strpcpyl(&s, l, " ", udev_list_entry_get_name(list_entry), NULL); | |
1188 | udev_device_add_property(udev_device, "DEVLINKS", symlinks); | |
1189 | } | |
1190 | } | |
1191 | if (!udev_device->tags_uptodate) { | |
1192 | udev_device->tags_uptodate = true; | |
1193 | if (udev_device_get_tags_list_entry(udev_device) != NULL) { | |
1194 | char tags[UTIL_PATH_SIZE]; | |
1195 | struct udev_list_entry *list_entry; | |
1196 | char *s; | |
1197 | size_t l; | |
1198 | ||
1199 | s = tags; | |
1200 | l = util_strpcpyl(&s, sizeof(tags), ":", NULL); | |
1201 | udev_list_entry_foreach(list_entry, udev_device_get_tags_list_entry(udev_device)) | |
1202 | l = util_strpcpyl(&s, l, udev_list_entry_get_name(list_entry), ":", NULL); | |
1203 | udev_device_add_property(udev_device, "TAGS", tags); | |
1204 | } | |
1205 | } | |
1206 | return udev_list_get_entry(&udev_device->properties_list); | |
eb1f0e66 | 1207 | } |
11d543c1 | 1208 | |
1e511322 KS |
1209 | /** |
1210 | * udev_device_get_action: | |
1211 | * @udev_device: udev device | |
1212 | * | |
1213 | * This is only valid if the device was received through a monitor. Devices read from | |
1214 | * sys do not have an action string. Usual actions are: add, remove, change, online, | |
1215 | * offline. | |
1216 | * | |
1217 | * Returns: the kernel action value, or #NULL if there is no action value available. | |
1218 | **/ | |
54cf0b7f | 1219 | _public_ const char *udev_device_get_action(struct udev_device *udev_device) |
c4f5f942 | 1220 | { |
912541b0 KS |
1221 | if (udev_device == NULL) |
1222 | return NULL; | |
1223 | return udev_device->action; | |
c4f5f942 KS |
1224 | } |
1225 | ||
9c6a11b1 KS |
1226 | /** |
1227 | * udev_device_get_usec_since_initialized: | |
1228 | * @udev_device: udev device | |
1229 | * | |
1230 | * Return the number of microseconds passed since udev set up the | |
1231 | * device for the first time. | |
1232 | * | |
1233 | * This is only implemented for devices with need to store properties | |
1234 | * in the udev database. All other devices return 0 here. | |
1235 | * | |
1236 | * Returns: the number of microseconds since the device was first seen. | |
1237 | **/ | |
54cf0b7f | 1238 | _public_ unsigned long long int udev_device_get_usec_since_initialized(struct udev_device *udev_device) |
9c6a11b1 | 1239 | { |
33502ffe | 1240 | unsigned long long now_ts; |
9c6a11b1 | 1241 | |
912541b0 KS |
1242 | if (udev_device == NULL) |
1243 | return 0; | |
1244 | if (!udev_device->info_loaded) | |
1245 | udev_device_read_db(udev_device, NULL); | |
1246 | if (udev_device->usec_initialized == 0) | |
1247 | return 0; | |
33502ffe KS |
1248 | now_ts = now_usec(); |
1249 | if (now_ts == 0) | |
912541b0 | 1250 | return 0; |
33502ffe | 1251 | return now_ts - udev_device->usec_initialized; |
9c6a11b1 KS |
1252 | } |
1253 | ||
1254 | unsigned long long udev_device_get_usec_initialized(struct udev_device *udev_device) | |
1255 | { | |
912541b0 | 1256 | return udev_device->usec_initialized; |
9c6a11b1 KS |
1257 | } |
1258 | ||
1259 | void udev_device_set_usec_initialized(struct udev_device *udev_device, unsigned long long usec_initialized) | |
1260 | { | |
912541b0 | 1261 | char num[32]; |
a20a57a7 | 1262 | |
912541b0 KS |
1263 | udev_device->usec_initialized = usec_initialized; |
1264 | snprintf(num, sizeof(num), "%llu", usec_initialized); | |
1265 | udev_device_add_property(udev_device, "USEC_INITIALIZED", num); | |
9c6a11b1 KS |
1266 | } |
1267 | ||
1e511322 KS |
1268 | /** |
1269 | * udev_device_get_sysattr_value: | |
1270 | * @udev_device: udev device | |
1271 | * @sysattr: attribute name | |
1272 | * | |
456719b6 | 1273 | * The retrieved value is cached in the device. Repeated calls will return the same |
1e511322 KS |
1274 | * value and not open the attribute again. |
1275 | * | |
1276 | * Returns: the content of a sys attribute file, or #NULL if there is no sys attribute value. | |
1277 | **/ | |
54cf0b7f | 1278 | _public_ const char *udev_device_get_sysattr_value(struct udev_device *udev_device, const char *sysattr) |
93b0f384 | 1279 | { |
912541b0 KS |
1280 | struct udev_list_entry *list_entry; |
1281 | char path[UTIL_PATH_SIZE]; | |
1282 | char value[4096]; | |
1283 | struct stat statbuf; | |
1284 | int fd; | |
1285 | ssize_t size; | |
1286 | const char *val = NULL; | |
1287 | ||
1288 | if (udev_device == NULL) | |
1289 | return NULL; | |
1290 | if (sysattr == NULL) | |
1291 | return NULL; | |
1292 | ||
1293 | /* look for possibly already cached result */ | |
1294 | list_entry = udev_list_get_entry(&udev_device->sysattr_value_list); | |
1295 | list_entry = udev_list_entry_get_by_name(list_entry, sysattr); | |
baa30fbc | 1296 | if (list_entry != NULL) |
912541b0 | 1297 | return udev_list_entry_get_value(list_entry); |
912541b0 KS |
1298 | |
1299 | util_strscpyl(path, sizeof(path), udev_device_get_syspath(udev_device), "/", sysattr, NULL); | |
1300 | if (lstat(path, &statbuf) != 0) { | |
912541b0 KS |
1301 | udev_list_entry_add(&udev_device->sysattr_value_list, sysattr, NULL); |
1302 | goto out; | |
1303 | } | |
1304 | ||
1305 | if (S_ISLNK(statbuf.st_mode)) { | |
1306 | struct udev_device *dev; | |
1307 | ||
1308 | /* | |
1309 | * Some core links return only the last element of the target path, | |
1310 | * these are just values, the paths should not be exposed. | |
1311 | */ | |
33502ffe KS |
1312 | if (streq(sysattr, "driver") || |
1313 | streq(sysattr, "subsystem") || | |
1314 | streq(sysattr, "module")) { | |
912541b0 KS |
1315 | if (util_get_sys_core_link_value(udev_device->udev, sysattr, |
1316 | udev_device->syspath, value, sizeof(value)) < 0) | |
1317 | return NULL; | |
912541b0 KS |
1318 | list_entry = udev_list_entry_add(&udev_device->sysattr_value_list, sysattr, value); |
1319 | val = udev_list_entry_get_value(list_entry); | |
1320 | goto out; | |
1321 | } | |
1322 | ||
1323 | /* resolve link to a device and return its syspath */ | |
1324 | util_strscpyl(path, sizeof(path), udev_device->syspath, "/", sysattr, NULL); | |
1325 | dev = udev_device_new_from_syspath(udev_device->udev, path); | |
1326 | if (dev != NULL) { | |
1327 | list_entry = udev_list_entry_add(&udev_device->sysattr_value_list, sysattr, | |
1328 | udev_device_get_syspath(dev)); | |
1329 | val = udev_list_entry_get_value(list_entry); | |
1330 | udev_device_unref(dev); | |
1331 | } | |
1332 | ||
1333 | goto out; | |
1334 | } | |
1335 | ||
1336 | /* skip directories */ | |
1337 | if (S_ISDIR(statbuf.st_mode)) | |
1338 | goto out; | |
1339 | ||
1340 | /* skip non-readable files */ | |
1341 | if ((statbuf.st_mode & S_IRUSR) == 0) | |
1342 | goto out; | |
1343 | ||
1344 | /* read attribute value */ | |
1345 | fd = open(path, O_RDONLY|O_CLOEXEC); | |
baa30fbc | 1346 | if (fd < 0) |
912541b0 | 1347 | goto out; |
912541b0 KS |
1348 | size = read(fd, value, sizeof(value)); |
1349 | close(fd); | |
1350 | if (size < 0) | |
1351 | goto out; | |
1352 | if (size == sizeof(value)) | |
1353 | goto out; | |
1354 | ||
1355 | /* got a valid value, store it in cache and return it */ | |
1356 | value[size] = '\0'; | |
1357 | util_remove_trailing_chars(value, '\n'); | |
912541b0 KS |
1358 | list_entry = udev_list_entry_add(&udev_device->sysattr_value_list, sysattr, value); |
1359 | val = udev_list_entry_get_value(list_entry); | |
93b0f384 | 1360 | out: |
912541b0 | 1361 | return val; |
93b0f384 | 1362 | } |
517814e7 | 1363 | |
20bee04c | 1364 | static int udev_device_sysattr_list_read(struct udev_device *udev_device) |
f180ad25 | 1365 | { |
912541b0 KS |
1366 | struct dirent *dent; |
1367 | DIR *dir; | |
1368 | int num = 0; | |
f180ad25 | 1369 | |
912541b0 KS |
1370 | if (udev_device == NULL) |
1371 | return -1; | |
1372 | if (udev_device->sysattr_list_read) | |
1373 | return 0; | |
f180ad25 | 1374 | |
912541b0 | 1375 | dir = opendir(udev_device_get_syspath(udev_device)); |
baa30fbc | 1376 | if (!dir) |
912541b0 | 1377 | return -1; |
f180ad25 | 1378 | |
912541b0 KS |
1379 | for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) { |
1380 | char path[UTIL_PATH_SIZE]; | |
1381 | struct stat statbuf; | |
f180ad25 | 1382 | |
912541b0 KS |
1383 | /* only handle symlinks and regular files */ |
1384 | if (dent->d_type != DT_LNK && dent->d_type != DT_REG) | |
1385 | continue; | |
f180ad25 | 1386 | |
912541b0 KS |
1387 | util_strscpyl(path, sizeof(path), udev_device_get_syspath(udev_device), "/", dent->d_name, NULL); |
1388 | if (lstat(path, &statbuf) != 0) | |
1389 | continue; | |
1390 | if ((statbuf.st_mode & S_IRUSR) == 0) | |
1391 | continue; | |
f180ad25 | 1392 | |
912541b0 KS |
1393 | udev_list_entry_add(&udev_device->sysattr_list, dent->d_name, NULL); |
1394 | num++; | |
1395 | } | |
f180ad25 | 1396 | |
912541b0 | 1397 | closedir(dir); |
912541b0 | 1398 | udev_device->sysattr_list_read = true; |
f180ad25 | 1399 | |
912541b0 | 1400 | return num; |
f180ad25 TE |
1401 | } |
1402 | ||
1403 | /** | |
1404 | * udev_device_get_sysattr_list_entry: | |
1405 | * @udev_device: udev device | |
1406 | * | |
1407 | * Retrieve the list of available sysattrs, with value being empty; | |
20bee04c KS |
1408 | * This just return all available sysfs attributes for a particular |
1409 | * device without reading their values. | |
f180ad25 TE |
1410 | * |
1411 | * Returns: the first entry of the property list | |
1412 | **/ | |
54cf0b7f | 1413 | _public_ struct udev_list_entry *udev_device_get_sysattr_list_entry(struct udev_device *udev_device) |
f180ad25 | 1414 | { |
912541b0 KS |
1415 | if (!udev_device->sysattr_list_read) { |
1416 | int ret; | |
1417 | ret = udev_device_sysattr_list_read(udev_device); | |
1418 | if (0 > ret) | |
1419 | return NULL; | |
1420 | } | |
f180ad25 | 1421 | |
912541b0 | 1422 | return udev_list_get_entry(&udev_device->sysattr_list); |
f180ad25 TE |
1423 | } |
1424 | ||
8cd2e972 | 1425 | int udev_device_set_syspath(struct udev_device *udev_device, const char *syspath) |
11d543c1 | 1426 | { |
912541b0 KS |
1427 | const char *pos; |
1428 | size_t len; | |
8753fadf | 1429 | |
912541b0 KS |
1430 | free(udev_device->syspath); |
1431 | udev_device->syspath = strdup(syspath); | |
1432 | if (udev_device->syspath == NULL) | |
1433 | return -ENOMEM; | |
6ada823a | 1434 | udev_device->devpath = udev_device->syspath + strlen(TEST_PREFIX "/sys"); |
912541b0 | 1435 | udev_device_add_property(udev_device, "DEVPATH", udev_device->devpath); |
517814e7 | 1436 | |
912541b0 KS |
1437 | pos = strrchr(udev_device->syspath, '/'); |
1438 | if (pos == NULL) | |
1439 | return -EINVAL; | |
1440 | udev_device->sysname = strdup(&pos[1]); | |
1441 | if (udev_device->sysname == NULL) | |
1442 | return -ENOMEM; | |
517814e7 | 1443 | |
912541b0 KS |
1444 | /* some devices have '!' in their name, change that to '/' */ |
1445 | len = 0; | |
1446 | while (udev_device->sysname[len] != '\0') { | |
1447 | if (udev_device->sysname[len] == '!') | |
1448 | udev_device->sysname[len] = '/'; | |
1449 | len++; | |
1450 | } | |
517814e7 | 1451 | |
912541b0 KS |
1452 | /* trailing number */ |
1453 | while (len > 0 && isdigit(udev_device->sysname[--len])) | |
1454 | udev_device->sysnum = &udev_device->sysname[len]; | |
babcf3cb | 1455 | |
912541b0 KS |
1456 | /* sysname is completely numeric */ |
1457 | if (len == 0) | |
1458 | udev_device->sysnum = NULL; | |
babcf3cb | 1459 | |
912541b0 | 1460 | return 0; |
11d543c1 KS |
1461 | } |
1462 | ||
8cd2e972 | 1463 | int udev_device_set_devnode(struct udev_device *udev_device, const char *devnode) |
11d543c1 | 1464 | { |
912541b0 KS |
1465 | free(udev_device->devnode); |
1466 | if (devnode[0] != '/') { | |
6ada823a | 1467 | if (asprintf(&udev_device->devnode, TEST_PREFIX "/dev/%s", devnode) < 0) |
912541b0 KS |
1468 | udev_device->devnode = NULL; |
1469 | } else { | |
1470 | udev_device->devnode = strdup(devnode); | |
1471 | } | |
1472 | if (udev_device->devnode == NULL) | |
1473 | return -ENOMEM; | |
1474 | udev_device_add_property(udev_device, "DEVNAME", udev_device->devnode); | |
1475 | return 0; | |
11d543c1 KS |
1476 | } |
1477 | ||
6c29f2b9 | 1478 | int udev_device_add_devlink(struct udev_device *udev_device, const char *devlink, int unique) |
11d543c1 | 1479 | { |
912541b0 | 1480 | struct udev_list_entry *list_entry; |
6c29f2b9 | 1481 | |
912541b0 KS |
1482 | udev_device->devlinks_uptodate = false; |
1483 | list_entry = udev_list_entry_add(&udev_device->devlinks_list, devlink, NULL); | |
1484 | if (list_entry == NULL) | |
1485 | return -ENOMEM; | |
1486 | if (unique) | |
1487 | udev_list_entry_set_num(list_entry, true); | |
1488 | return 0; | |
11d543c1 KS |
1489 | } |
1490 | ||
4281da1f KS |
1491 | const char *udev_device_get_id_filename(struct udev_device *udev_device) |
1492 | { | |
912541b0 KS |
1493 | if (udev_device->id_filename == NULL) { |
1494 | if (udev_device_get_subsystem(udev_device) == NULL) | |
1495 | return NULL; | |
1496 | ||
1497 | if (major(udev_device_get_devnum(udev_device)) > 0) { | |
1498 | /* use dev_t -- b259:131072, c254:0 */ | |
1499 | if (asprintf(&udev_device->id_filename, "%c%u:%u", | |
33502ffe | 1500 | streq(udev_device_get_subsystem(udev_device), "block") ? 'b' : 'c', |
912541b0 KS |
1501 | major(udev_device_get_devnum(udev_device)), |
1502 | minor(udev_device_get_devnum(udev_device))) < 0) | |
1503 | udev_device->id_filename = NULL; | |
1504 | } else if (udev_device_get_ifindex(udev_device) > 0) { | |
1505 | /* use netdev ifindex -- n3 */ | |
1506 | if (asprintf(&udev_device->id_filename, "n%u", udev_device_get_ifindex(udev_device)) < 0) | |
1507 | udev_device->id_filename = NULL; | |
1508 | } else { | |
1509 | /* | |
1510 | * use $subsys:$syname -- pci:0000:00:1f.2 | |
1511 | * sysname() has '!' translated, get it from devpath | |
1512 | */ | |
1513 | const char *sysname; | |
1514 | sysname = strrchr(udev_device->devpath, '/'); | |
1515 | if (sysname == NULL) | |
1516 | return NULL; | |
1517 | sysname = &sysname[1]; | |
1518 | if (asprintf(&udev_device->id_filename, "+%s:%s", udev_device_get_subsystem(udev_device), sysname) < 0) | |
1519 | udev_device->id_filename = NULL; | |
1520 | } | |
1521 | } | |
1522 | return udev_device->id_filename; | |
4281da1f KS |
1523 | } |
1524 | ||
48a0170b KS |
1525 | /** |
1526 | * udev_device_get_is_initialized: | |
1527 | * @udev_device: udev device | |
1528 | * | |
1529 | * Check if udev has already handled the device and has set up | |
1530 | * device node permissions and context, or has renamed a network | |
1531 | * device. | |
1532 | * | |
9c6a11b1 | 1533 | * This is only implemented for devices with a device node |
48a0170b KS |
1534 | * or network interfaces. All other devices return 1 here. |
1535 | * | |
1536 | * Returns: 1 if the device is set up. 0 otherwise. | |
1537 | **/ | |
54cf0b7f | 1538 | _public_ int udev_device_get_is_initialized(struct udev_device *udev_device) |
48a0170b | 1539 | { |
912541b0 KS |
1540 | if (!udev_device->info_loaded) |
1541 | udev_device_read_db(udev_device, NULL); | |
1542 | return udev_device->is_initialized; | |
48a0170b KS |
1543 | } |
1544 | ||
1545 | void udev_device_set_is_initialized(struct udev_device *udev_device) | |
1546 | { | |
912541b0 | 1547 | udev_device->is_initialized = true; |
48a0170b KS |
1548 | } |
1549 | ||
28460195 KS |
1550 | int udev_device_add_tag(struct udev_device *udev_device, const char *tag) |
1551 | { | |
912541b0 KS |
1552 | if (strchr(tag, ':') != NULL || strchr(tag, ' ') != NULL) |
1553 | return -EINVAL; | |
1554 | udev_device->tags_uptodate = false; | |
1555 | if (udev_list_entry_add(&udev_device->tags_list, tag, NULL) != NULL) | |
1556 | return 0; | |
1557 | return -ENOMEM; | |
28460195 KS |
1558 | } |
1559 | ||
1560 | void udev_device_cleanup_tags_list(struct udev_device *udev_device) | |
1561 | { | |
912541b0 KS |
1562 | udev_device->tags_uptodate = false; |
1563 | udev_list_cleanup(&udev_device->tags_list); | |
28460195 KS |
1564 | } |
1565 | ||
f712894d KS |
1566 | /** |
1567 | * udev_device_get_tags_list_entry: | |
1568 | * @udev_device: udev device | |
1569 | * | |
1570 | * Retrieve the list of tags attached to the udev device. The next | |
bb061708 | 1571 | * list entry can be retrieved with udev_list_entry_get_next(), |
f712894d | 1572 | * which returns #NULL if no more entries exist. The tag string |
bb061708 | 1573 | * can be retrieved from the list entry by udev_list_entry_get_name(). |
f712894d KS |
1574 | * |
1575 | * Returns: the first entry of the tag list | |
1576 | **/ | |
54cf0b7f | 1577 | _public_ struct udev_list_entry *udev_device_get_tags_list_entry(struct udev_device *udev_device) |
28460195 | 1578 | { |
912541b0 KS |
1579 | if (udev_device == NULL) |
1580 | return NULL; | |
1581 | if (!udev_device->info_loaded) | |
1582 | udev_device_read_db(udev_device, NULL); | |
1583 | return udev_list_get_entry(&udev_device->tags_list); | |
28460195 KS |
1584 | } |
1585 | ||
54cf0b7f | 1586 | _public_ int udev_device_has_tag(struct udev_device *udev_device, const char *tag) |
28460195 | 1587 | { |
912541b0 | 1588 | struct udev_list_entry *list_entry; |
28460195 | 1589 | |
912541b0 KS |
1590 | if (udev_device == NULL) |
1591 | return false; | |
1592 | if (!udev_device->info_loaded) | |
1593 | udev_device_read_db(udev_device, NULL); | |
1594 | list_entry = udev_device_get_tags_list_entry(udev_device); | |
1595 | if (udev_list_entry_get_by_name(list_entry, tag) != NULL) | |
1596 | return true; | |
1597 | return false; | |
28460195 KS |
1598 | } |
1599 | ||
912541b0 KS |
1600 | #define ENVP_SIZE 128 |
1601 | #define MONITOR_BUF_SIZE 4096 | |
6493e655 | 1602 | static int update_envp_monitor_buf(struct udev_device *udev_device) |
979ff016 | 1603 | { |
912541b0 KS |
1604 | struct udev_list_entry *list_entry; |
1605 | char *s; | |
1606 | size_t l; | |
1607 | unsigned int i; | |
1608 | ||
1609 | /* monitor buffer of property strings */ | |
1610 | free(udev_device->monitor_buf); | |
1611 | udev_device->monitor_buf_len = 0; | |
1612 | udev_device->monitor_buf = malloc(MONITOR_BUF_SIZE); | |
1613 | if (udev_device->monitor_buf == NULL) | |
1614 | return -ENOMEM; | |
1615 | ||
1616 | /* envp array, strings will point into monitor buffer */ | |
1617 | if (udev_device->envp == NULL) | |
1618 | udev_device->envp = malloc(sizeof(char *) * ENVP_SIZE); | |
1619 | if (udev_device->envp == NULL) | |
1620 | return -ENOMEM; | |
1621 | ||
1622 | i = 0; | |
1623 | s = udev_device->monitor_buf; | |
1624 | l = MONITOR_BUF_SIZE; | |
1625 | udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(udev_device)) { | |
1626 | const char *key; | |
1627 | ||
1628 | key = udev_list_entry_get_name(list_entry); | |
1629 | /* skip private variables */ | |
1630 | if (key[0] == '.') | |
1631 | continue; | |
1632 | ||
1633 | /* add string to envp array */ | |
1634 | udev_device->envp[i++] = s; | |
1635 | if (i+1 >= ENVP_SIZE) | |
1636 | return -EINVAL; | |
1637 | ||
1638 | /* add property string to monitor buffer */ | |
1639 | l = util_strpcpyl(&s, l, key, "=", udev_list_entry_get_value(list_entry), NULL); | |
1640 | if (l == 0) | |
1641 | return -EINVAL; | |
1642 | /* advance past the trailing '\0' that util_strpcpyl() guarantees */ | |
1643 | s++; | |
1644 | l--; | |
1645 | } | |
1646 | udev_device->envp[i] = NULL; | |
1647 | udev_device->monitor_buf_len = s - udev_device->monitor_buf; | |
1648 | udev_device->envp_uptodate = true; | |
912541b0 | 1649 | return 0; |
6493e655 KS |
1650 | } |
1651 | ||
1652 | char **udev_device_get_properties_envp(struct udev_device *udev_device) | |
1653 | { | |
912541b0 KS |
1654 | if (!udev_device->envp_uptodate) |
1655 | if (update_envp_monitor_buf(udev_device) != 0) | |
1656 | return NULL; | |
1657 | return udev_device->envp; | |
6493e655 KS |
1658 | } |
1659 | ||
1660 | ssize_t udev_device_get_properties_monitor_buf(struct udev_device *udev_device, const char **buf) | |
1661 | { | |
912541b0 KS |
1662 | if (!udev_device->envp_uptodate) |
1663 | if (update_envp_monitor_buf(udev_device) != 0) | |
1664 | return -EINVAL; | |
1665 | *buf = udev_device->monitor_buf; | |
1666 | return udev_device->monitor_buf_len; | |
c2654402 KS |
1667 | } |
1668 | ||
8cd2e972 | 1669 | int udev_device_set_action(struct udev_device *udev_device, const char *action) |
c4f5f942 | 1670 | { |
912541b0 KS |
1671 | free(udev_device->action); |
1672 | udev_device->action = strdup(action); | |
1673 | if (udev_device->action == NULL) | |
1674 | return -ENOMEM; | |
1675 | udev_device_add_property(udev_device, "ACTION", udev_device->action); | |
1676 | return 0; | |
c4f5f942 KS |
1677 | } |
1678 | ||
8cd2e972 | 1679 | int udev_device_get_devlink_priority(struct udev_device *udev_device) |
6bd1c78a | 1680 | { |
912541b0 KS |
1681 | if (!udev_device->info_loaded) |
1682 | udev_device_read_db(udev_device, NULL); | |
1683 | return udev_device->devlink_priority; | |
6bd1c78a KS |
1684 | } |
1685 | ||
8cd2e972 | 1686 | int udev_device_set_devlink_priority(struct udev_device *udev_device, int prio) |
6bd1c78a | 1687 | { |
912541b0 KS |
1688 | udev_device->devlink_priority = prio; |
1689 | return 0; | |
6bd1c78a KS |
1690 | } |
1691 | ||
d7ce7539 SJR |
1692 | int udev_device_get_watch_handle(struct udev_device *udev_device) |
1693 | { | |
912541b0 KS |
1694 | if (!udev_device->info_loaded) |
1695 | udev_device_read_db(udev_device, NULL); | |
1696 | return udev_device->watch_handle; | |
d7ce7539 SJR |
1697 | } |
1698 | ||
1699 | int udev_device_set_watch_handle(struct udev_device *udev_device, int handle) | |
1700 | { | |
912541b0 KS |
1701 | udev_device->watch_handle = handle; |
1702 | return 0; | |
d7ce7539 | 1703 | } |
fc416258 | 1704 | |
9ead6627 KS |
1705 | bool udev_device_get_db_persist(struct udev_device *udev_device) |
1706 | { | |
912541b0 | 1707 | return udev_device->db_persist; |
9ead6627 KS |
1708 | } |
1709 | ||
1710 | void udev_device_set_db_persist(struct udev_device *udev_device) | |
1711 | { | |
912541b0 | 1712 | udev_device->db_persist = true; |
9ead6627 | 1713 | } |