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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 | **/ | |
101 | UDEV_EXPORT unsigned long long int udev_device_get_seqnum(struct udev_device *udev_device) | |
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 | **/ | |
141 | UDEV_EXPORT dev_t udev_device_get_devnum(struct udev_device *udev_device) | |
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 | **/ | |
190 | UDEV_EXPORT const char *udev_device_get_driver(struct udev_device *udev_device) | |
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 | **/ | |
223 | UDEV_EXPORT const char *udev_device_get_devtype(struct udev_device *udev_device) | |
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 | **/ | |
265 | UDEV_EXPORT const char *udev_device_get_subsystem(struct udev_device *udev_device) | |
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 */ | |
279 | if (strncmp(udev_device->devpath, "/module/", 8) == 0) { | |
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 | } | |
287 | if (strncmp(udev_device->devpath, "/subsystem/", 11) == 0 || | |
288 | strncmp(udev_device->devpath, "/class/", 7) == 0 || | |
289 | strncmp(udev_device->devpath, "/bus/", 5) == 0) { | |
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 | { | |
912541b0 KS |
356 | if (strncmp(property, "DEVPATH=", 8) == 0) { |
357 | char path[UTIL_PATH_SIZE]; | |
358 | ||
359 | util_strscpyl(path, sizeof(path), udev_get_sys_path(udev_device->udev), &property[8], NULL); | |
360 | udev_device_set_syspath(udev_device, path); | |
361 | } else if (strncmp(property, "SUBSYSTEM=", 10) == 0) { | |
362 | udev_device_set_subsystem(udev_device, &property[10]); | |
363 | } else if (strncmp(property, "DEVTYPE=", 8) == 0) { | |
364 | udev_device_set_devtype(udev_device, &property[8]); | |
365 | } else if (strncmp(property, "DEVNAME=", 8) == 0) { | |
366 | udev_device_set_devnode(udev_device, &property[8]); | |
367 | } else if (strncmp(property, "DEVLINKS=", 9) == 0) { | |
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); | |
383 | } else if (strncmp(property, "TAGS=", 5) == 0) { | |
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 | } | |
403 | } else if (strncmp(property, "USEC_INITIALIZED=", 19) == 0) { | |
404 | udev_device_set_usec_initialized(udev_device, strtoull(&property[19], NULL, 10)); | |
405 | } else if (strncmp(property, "DRIVER=", 7) == 0) { | |
406 | udev_device_set_driver(udev_device, &property[7]); | |
407 | } else if (strncmp(property, "ACTION=", 7) == 0) { | |
408 | udev_device_set_action(udev_device, &property[7]); | |
409 | } else if (strncmp(property, "MAJOR=", 6) == 0) { | |
410 | udev_device->maj = strtoull(&property[6], NULL, 10); | |
411 | } else if (strncmp(property, "MINOR=", 6) == 0) { | |
412 | udev_device->min = strtoull(&property[6], NULL, 10); | |
413 | } else if (strncmp(property, "DEVPATH_OLD=", 12) == 0) { | |
414 | udev_device_set_devpath_old(udev_device, &property[12]); | |
415 | } else if (strncmp(property, "SEQNUM=", 7) == 0) { | |
416 | udev_device_set_seqnum(udev_device, strtoull(&property[7], NULL, 10)); | |
417 | } else if (strncmp(property, "IFINDEX=", 8) == 0) { | |
418 | udev_device_set_ifindex(udev_device, strtoull(&property[8], NULL, 10)); | |
419 | } else if (strncmp(property, "DEVMODE=", 8) == 0) { | |
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 | **/ | |
666fcf03 | 445 | UDEV_EXPORT 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; | |
476 | util_strscpyl(filename, sizeof(filename), udev_get_run_path(udev_device->udev), "/data/", id, NULL); | |
477 | dbfile = filename; | |
478 | } | |
479 | ||
480 | f = fopen(dbfile, "re"); | |
481 | if (f == NULL) { | |
482 | info(udev_device->udev, "no db file to read %s: %m\n", dbfile); | |
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': | |
499 | util_strscpyl(filename, sizeof(filename), udev_get_dev_path(udev_device->udev), "/", val, NULL); | |
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 | ||
522 | info(udev_device->udev, "device %p filled with db file data\n", udev_device); | |
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 | ||
d2b795f2 | 551 | if (strncmp(line, "DEVTYPE=", 8) == 0) { |
912541b0 | 552 | udev_device_set_devtype(udev_device, &line[8]); |
d2b795f2 KS |
553 | continue; |
554 | } | |
555 | if (strncmp(line, "IFINDEX=", 8) == 0) { | |
556 | udev_device_set_ifindex(udev_device, strtoull(&line[8], NULL, 10)); | |
557 | continue; | |
558 | } | |
559 | if (strncmp(line, "DEVNAME=", 8) == 0) { | |
560 | udev_device_set_devnode(udev_device, &line[8]); | |
561 | continue; | |
562 | } | |
563 | ||
564 | if (strncmp(line, "MAJOR=", 6) == 0) | |
912541b0 KS |
565 | maj = strtoull(&line[6], NULL, 10); |
566 | else if (strncmp(line, "MINOR=", 6) == 0) | |
567 | min = strtoull(&line[6], NULL, 10); | |
912541b0 KS |
568 | else if (strncmp(line, "DEVMODE=", 8) == 0) |
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)); | |
608 | dbg(udev_device->udev, "udev_device: %p created\n", udev_device); | |
609 | return udev_device; | |
eb1f0e66 KS |
610 | } |
611 | ||
612 | /** | |
8753fadf | 613 | * udev_device_new_from_syspath: |
eb1f0e66 | 614 | * @udev: udev library context |
8753fadf | 615 | * @syspath: sys device path including sys directory |
eb1f0e66 | 616 | * |
8753fadf | 617 | * Create new udev device, and fill in information from the sys |
214a6c79 | 618 | * device and the udev database entry. The syspath is the absolute |
8753fadf | 619 | * path to the device, including the sys mount point. |
eb1f0e66 KS |
620 | * |
621 | * The initial refcount is 1, and needs to be decremented to | |
be7de409 | 622 | * release the resources of the udev device. |
eb1f0e66 KS |
623 | * |
624 | * Returns: a new udev device, or #NULL, if it does not exist | |
625 | **/ | |
666fcf03 | 626 | UDEV_EXPORT struct udev_device *udev_device_new_from_syspath(struct udev *udev, const char *syspath) |
eb1f0e66 | 627 | { |
912541b0 KS |
628 | size_t len; |
629 | const char *subdir; | |
630 | char path[UTIL_PATH_SIZE]; | |
631 | char *pos; | |
632 | struct stat statbuf; | |
633 | struct udev_device *udev_device; | |
634 | ||
635 | if (udev == NULL) | |
636 | return NULL; | |
637 | if (syspath == NULL) | |
638 | return NULL; | |
639 | ||
640 | /* path starts in sys */ | |
641 | len = strlen(udev_get_sys_path(udev)); | |
642 | if (strncmp(syspath, udev_get_sys_path(udev), len) != 0) { | |
643 | info(udev, "not in sys :%s\n", syspath); | |
644 | return NULL; | |
645 | } | |
646 | ||
647 | /* path is not a root directory */ | |
648 | subdir = &syspath[len+1]; | |
649 | pos = strrchr(subdir, '/'); | |
650 | if (pos == NULL || pos[1] == '\0' || pos < &subdir[2]) { | |
651 | dbg(udev, "not a subdir :%s\n", syspath); | |
652 | return NULL; | |
653 | } | |
654 | ||
655 | /* resolve possible symlink to real path */ | |
656 | util_strscpy(path, sizeof(path), syspath); | |
657 | util_resolve_sys_link(udev, path, sizeof(path)); | |
658 | ||
659 | if (strncmp(&path[len], "/devices/", 9) == 0) { | |
660 | char file[UTIL_PATH_SIZE]; | |
661 | ||
662 | /* all "devices" require a "uevent" file */ | |
663 | util_strscpyl(file, sizeof(file), path, "/uevent", NULL); | |
664 | if (stat(file, &statbuf) != 0) { | |
665 | dbg(udev, "not a device: %s\n", syspath); | |
666 | return NULL; | |
667 | } | |
668 | } else { | |
669 | /* everything else just needs to be a directory */ | |
670 | if (stat(path, &statbuf) != 0 || !S_ISDIR(statbuf.st_mode)) { | |
671 | dbg(udev, "directory not found: %s\n", syspath); | |
672 | return NULL; | |
673 | } | |
674 | } | |
675 | ||
676 | udev_device = udev_device_new(udev); | |
677 | if (udev_device == NULL) | |
678 | return NULL; | |
679 | ||
680 | udev_device_set_syspath(udev_device, path); | |
681 | info(udev, "device %p has devpath '%s'\n", udev_device, udev_device_get_devpath(udev_device)); | |
682 | ||
683 | return udev_device; | |
eb1f0e66 KS |
684 | } |
685 | ||
1e511322 KS |
686 | /** |
687 | * udev_device_new_from_devnum: | |
688 | * @udev: udev library context | |
689 | * @type: char or block device | |
690 | * @devnum: device major/minor number | |
691 | * | |
692 | * Create new udev device, and fill in information from the sys | |
dbba7e40 KS |
693 | * device and the udev database entry. The device is looked-up |
694 | * by its major/minor number and type. Character and block device | |
695 | * numbers are not unique across the two types. | |
1e511322 KS |
696 | * |
697 | * The initial refcount is 1, and needs to be decremented to | |
698 | * release the resources of the udev device. | |
699 | * | |
700 | * Returns: a new udev device, or #NULL, if it does not exist | |
701 | **/ | |
666fcf03 | 702 | UDEV_EXPORT struct udev_device *udev_device_new_from_devnum(struct udev *udev, char type, dev_t devnum) |
4c9dff47 | 703 | { |
912541b0 KS |
704 | char path[UTIL_PATH_SIZE]; |
705 | const char *type_str; | |
03198b93 | 706 | |
912541b0 KS |
707 | if (type == 'b') |
708 | type_str = "block"; | |
709 | else if (type == 'c') | |
710 | type_str = "char"; | |
711 | else | |
712 | return NULL; | |
4c9dff47 | 713 | |
912541b0 KS |
714 | /* use /sys/dev/{block,char}/<maj>:<min> link */ |
715 | snprintf(path, sizeof(path), "%s/dev/%s/%u:%u", | |
716 | udev_get_sys_path(udev), type_str, major(devnum), minor(devnum)); | |
717 | return udev_device_new_from_syspath(udev, path); | |
4c9dff47 KS |
718 | } |
719 | ||
cad40a5f KS |
720 | struct udev_device *udev_device_new_from_id_filename(struct udev *udev, char *id) |
721 | { | |
912541b0 KS |
722 | char type; |
723 | int maj, min; | |
724 | char subsys[UTIL_PATH_SIZE]; | |
725 | char *sysname; | |
726 | ||
727 | switch(id[0]) { | |
728 | case 'b': | |
729 | case 'c': | |
730 | if (sscanf(id, "%c%i:%i", &type, &maj, &min) != 3) | |
731 | return NULL; | |
732 | return udev_device_new_from_devnum(udev, type, makedev(maj, min)); | |
733 | case 'n': { | |
734 | int sk; | |
735 | struct ifreq ifr; | |
736 | struct udev_device *dev; | |
737 | int ifindex; | |
738 | ||
739 | ifindex = strtoul(&id[1], NULL, 10); | |
740 | if (ifindex <= 0) | |
741 | return NULL; | |
742 | ||
743 | sk = socket(PF_INET, SOCK_DGRAM, 0); | |
744 | if (sk < 0) | |
745 | return NULL; | |
746 | memset(&ifr, 0x00, sizeof(struct ifreq)); | |
747 | ifr.ifr_ifindex = ifindex; | |
748 | if (ioctl(sk, SIOCGIFNAME, &ifr) != 0) { | |
749 | close(sk); | |
750 | return NULL; | |
751 | } | |
752 | close(sk); | |
753 | ||
754 | dev = udev_device_new_from_subsystem_sysname(udev, "net", ifr.ifr_name); | |
755 | if (dev == NULL) | |
756 | return NULL; | |
757 | if (udev_device_get_ifindex(dev) == ifindex) | |
758 | return dev; | |
759 | udev_device_unref(dev); | |
760 | return NULL; | |
761 | } | |
762 | case '+': | |
763 | util_strscpy(subsys, sizeof(subsys), &id[1]); | |
764 | sysname = strchr(subsys, ':'); | |
765 | if (sysname == NULL) | |
766 | return NULL; | |
767 | sysname[0] = '\0'; | |
768 | sysname = &sysname[1]; | |
769 | return udev_device_new_from_subsystem_sysname(udev, subsys, sysname); | |
770 | default: | |
771 | return NULL; | |
772 | } | |
cad40a5f KS |
773 | } |
774 | ||
1e511322 KS |
775 | /** |
776 | * udev_device_new_from_subsystem_sysname: | |
777 | * @udev: udev library context | |
214a6c79 | 778 | * @subsystem: the subsystem of the device |
1e511322 KS |
779 | * @sysname: the name of the device |
780 | * | |
dbba7e40 KS |
781 | * Create new udev device, and fill in information from the sys device |
782 | * and the udev database entry. The device is looked up by the subsystem | |
783 | * and name string of the device, like "mem" / "zero", or "block" / "sda". | |
1e511322 KS |
784 | * |
785 | * The initial refcount is 1, and needs to be decremented to | |
786 | * release the resources of the udev device. | |
787 | * | |
788 | * Returns: a new udev device, or #NULL, if it does not exist | |
789 | **/ | |
666fcf03 | 790 | UDEV_EXPORT struct udev_device *udev_device_new_from_subsystem_sysname(struct udev *udev, const char *subsystem, const char *sysname) |
90d80c2e | 791 | { |
912541b0 KS |
792 | char path_full[UTIL_PATH_SIZE]; |
793 | char *path; | |
794 | size_t l; | |
795 | struct stat statbuf; | |
796 | ||
797 | path = path_full; | |
798 | l = util_strpcpyl(&path, sizeof(path_full), udev_get_sys_path(udev), NULL); | |
799 | ||
800 | if (strcmp(subsystem, "subsystem") == 0) { | |
801 | util_strscpyl(path, l, "/subsystem/", sysname, NULL); | |
802 | if (stat(path_full, &statbuf) == 0) | |
803 | goto found; | |
804 | ||
805 | util_strscpyl(path, l, "/bus/", sysname, NULL); | |
806 | if (stat(path_full, &statbuf) == 0) | |
807 | goto found; | |
808 | ||
809 | util_strscpyl(path, l, "/class/", sysname, NULL); | |
810 | if (stat(path_full, &statbuf) == 0) | |
811 | goto found; | |
812 | goto out; | |
813 | } | |
814 | ||
815 | if (strcmp(subsystem, "module") == 0) { | |
816 | util_strscpyl(path, l, "/module/", sysname, NULL); | |
817 | if (stat(path_full, &statbuf) == 0) | |
818 | goto found; | |
819 | goto out; | |
820 | } | |
821 | ||
822 | if (strcmp(subsystem, "drivers") == 0) { | |
823 | char subsys[UTIL_NAME_SIZE]; | |
824 | char *driver; | |
825 | ||
826 | util_strscpy(subsys, sizeof(subsys), sysname); | |
827 | driver = strchr(subsys, ':'); | |
828 | if (driver != NULL) { | |
829 | driver[0] = '\0'; | |
830 | driver = &driver[1]; | |
831 | ||
832 | util_strscpyl(path, l, "/subsystem/", subsys, "/drivers/", driver, NULL); | |
833 | if (stat(path_full, &statbuf) == 0) | |
834 | goto found; | |
835 | ||
836 | util_strscpyl(path, l, "/bus/", subsys, "/drivers/", driver, NULL); | |
837 | if (stat(path_full, &statbuf) == 0) | |
838 | goto found; | |
839 | } | |
840 | goto out; | |
841 | } | |
842 | ||
843 | util_strscpyl(path, l, "/subsystem/", subsystem, "/devices/", sysname, NULL); | |
844 | if (stat(path_full, &statbuf) == 0) | |
845 | goto found; | |
846 | ||
847 | util_strscpyl(path, l, "/bus/", subsystem, "/devices/", sysname, NULL); | |
848 | if (stat(path_full, &statbuf) == 0) | |
849 | goto found; | |
850 | ||
851 | util_strscpyl(path, l, "/class/", subsystem, "/", sysname, NULL); | |
852 | if (stat(path_full, &statbuf) == 0) | |
853 | goto found; | |
90d80c2e | 854 | out: |
912541b0 | 855 | return NULL; |
90d80c2e | 856 | found: |
912541b0 | 857 | return udev_device_new_from_syspath(udev, path_full); |
90d80c2e KS |
858 | } |
859 | ||
fc8d61c5 KS |
860 | /** |
861 | * udev_device_new_from_environment | |
862 | * @udev: udev library context | |
863 | * | |
864 | * Create new udev device, and fill in information from the | |
865 | * current process environment. This only works reliable if | |
866 | * the process is called from a udev rule. It is usually used | |
867 | * for tools executed from IMPORT= rules. | |
868 | * | |
869 | * The initial refcount is 1, and needs to be decremented to | |
870 | * release the resources of the udev device. | |
871 | * | |
872 | * Returns: a new udev device, or #NULL, if it does not exist | |
873 | **/ | |
666fcf03 | 874 | UDEV_EXPORT struct udev_device *udev_device_new_from_environment(struct udev *udev) |
fc8d61c5 | 875 | { |
912541b0 KS |
876 | int i; |
877 | struct udev_device *udev_device; | |
fc8d61c5 | 878 | |
912541b0 KS |
879 | udev_device = udev_device_new(udev); |
880 | if (udev_device == NULL) | |
881 | return NULL; | |
882 | udev_device_set_info_loaded(udev_device); | |
fc8d61c5 | 883 | |
912541b0 KS |
884 | for (i = 0; environ[i] != NULL; i++) |
885 | udev_device_add_property_from_string_parse(udev_device, environ[i]); | |
fc8d61c5 | 886 | |
912541b0 KS |
887 | if (udev_device_add_property_from_string_parse_finish(udev_device) < 0) { |
888 | info(udev, "missing values, invalid device\n"); | |
889 | udev_device_unref(udev_device); | |
890 | udev_device = NULL; | |
891 | } | |
fc8d61c5 | 892 | |
912541b0 | 893 | return udev_device; |
fc8d61c5 KS |
894 | } |
895 | ||
b2d9e4f2 | 896 | static struct udev_device *device_new_from_parent(struct udev_device *udev_device) |
4ad3a37f | 897 | { |
912541b0 KS |
898 | struct udev_device *udev_device_parent = NULL; |
899 | char path[UTIL_PATH_SIZE]; | |
900 | const char *subdir; | |
4ad3a37f | 901 | |
912541b0 KS |
902 | util_strscpy(path, sizeof(path), udev_device->syspath); |
903 | subdir = &path[strlen(udev_get_sys_path(udev_device->udev))+1]; | |
904 | for (;;) { | |
905 | char *pos; | |
b95f8a76 | 906 | |
912541b0 KS |
907 | pos = strrchr(subdir, '/'); |
908 | if (pos == NULL || pos < &subdir[2]) | |
909 | break; | |
910 | pos[0] = '\0'; | |
911 | udev_device_parent = udev_device_new_from_syspath(udev_device->udev, path); | |
912 | if (udev_device_parent != NULL) | |
913 | return udev_device_parent; | |
914 | } | |
915 | return NULL; | |
4ad3a37f KS |
916 | } |
917 | ||
1e511322 KS |
918 | /** |
919 | * udev_device_get_parent: | |
920 | * @udev_device: the device to start searching from | |
921 | * | |
922 | * Find the next parent device, and fill in information from the sys | |
923 | * device and the udev database entry. | |
924 | * | |
925 | * The returned the device is not referenced. It is attached to the | |
926 | * child device, and will be cleaned up when the child device | |
927 | * is cleaned up. | |
928 | * | |
214a6c79 | 929 | * It is not necessarily just the upper level directory, empty or not |
1e511322 KS |
930 | * recognized sys directories are ignored. |
931 | * | |
932 | * It can be called as many times as needed, without caring about | |
933 | * references. | |
934 | * | |
935 | * Returns: a new udev device, or #NULL, if it no parent exist. | |
936 | **/ | |
666fcf03 | 937 | UDEV_EXPORT struct udev_device *udev_device_get_parent(struct udev_device *udev_device) |
b2d9e4f2 | 938 | { |
912541b0 KS |
939 | if (udev_device == NULL) |
940 | return NULL; | |
941 | if (!udev_device->parent_set) { | |
942 | udev_device->parent_set = true; | |
943 | udev_device->parent_device = device_new_from_parent(udev_device); | |
944 | } | |
945 | if (udev_device->parent_device != NULL) | |
946 | dbg(udev_device->udev, "returning existing parent %p\n", udev_device->parent_device); | |
947 | return udev_device->parent_device; | |
b2d9e4f2 KS |
948 | } |
949 | ||
1e511322 KS |
950 | /** |
951 | * udev_device_get_parent_with_subsystem_devtype: | |
952 | * @udev_device: udev device to start searching from | |
214a6c79 | 953 | * @subsystem: the subsystem of the device |
1e511322 KS |
954 | * @devtype: the type (DEVTYPE) of the device |
955 | * | |
956 | * Find the next parent device, with a matching subsystem and devtype | |
957 | * value, and fill in information from the sys device and the udev | |
958 | * database entry. | |
959 | * | |
79ef2e97 | 960 | * If devtype is #NULL, only subsystem is checked, and any devtype will |
54d4f54e MP |
961 | * match. |
962 | * | |
1e511322 KS |
963 | * The returned the device is not referenced. It is attached to the |
964 | * child device, and will be cleaned up when the child device | |
965 | * is cleaned up. | |
966 | * | |
967 | * It can be called as many times as needed, without caring about | |
968 | * references. | |
969 | * | |
8d6bc73a | 970 | * Returns: a new udev device, or #NULL if no matching parent exists. |
1e511322 | 971 | **/ |
666fcf03 | 972 | UDEV_EXPORT struct udev_device *udev_device_get_parent_with_subsystem_devtype(struct udev_device *udev_device, const char *subsystem, const char *devtype) |
bf8b2ae1 | 973 | { |
912541b0 | 974 | struct udev_device *parent; |
bf8b2ae1 | 975 | |
912541b0 KS |
976 | if (subsystem == NULL) |
977 | return NULL; | |
883012d4 | 978 | |
912541b0 KS |
979 | parent = udev_device_get_parent(udev_device); |
980 | while (parent != NULL) { | |
981 | const char *parent_subsystem; | |
982 | const char *parent_devtype; | |
bf8b2ae1 | 983 | |
912541b0 KS |
984 | parent_subsystem = udev_device_get_subsystem(parent); |
985 | if (parent_subsystem != NULL && strcmp(parent_subsystem, subsystem) == 0) { | |
986 | if (devtype == NULL) | |
987 | break; | |
988 | parent_devtype = udev_device_get_devtype(parent); | |
989 | if (parent_devtype != NULL && strcmp(parent_devtype, devtype) == 0) | |
990 | break; | |
991 | } | |
992 | parent = udev_device_get_parent(parent); | |
993 | } | |
994 | return parent; | |
bf8b2ae1 MH |
995 | } |
996 | ||
eb1f0e66 KS |
997 | /** |
998 | * udev_device_get_udev: | |
7d8787b3 | 999 | * @udev_device: udev device |
eb1f0e66 KS |
1000 | * |
1001 | * Retrieve the udev library context the device was created with. | |
1002 | * | |
1003 | * Returns: the udev library context | |
1004 | **/ | |
666fcf03 | 1005 | UDEV_EXPORT struct udev *udev_device_get_udev(struct udev_device *udev_device) |
eb1f0e66 | 1006 | { |
912541b0 KS |
1007 | if (udev_device == NULL) |
1008 | return NULL; | |
1009 | return udev_device->udev; | |
eb1f0e66 KS |
1010 | } |
1011 | ||
1012 | /** | |
1013 | * udev_device_ref: | |
1014 | * @udev_device: udev device | |
1015 | * | |
1016 | * Take a reference of a udev device. | |
1017 | * | |
1018 | * Returns: the passed udev device | |
1019 | **/ | |
666fcf03 | 1020 | UDEV_EXPORT struct udev_device *udev_device_ref(struct udev_device *udev_device) |
eb1f0e66 | 1021 | { |
912541b0 KS |
1022 | if (udev_device == NULL) |
1023 | return NULL; | |
1024 | udev_device->refcount++; | |
1025 | return udev_device; | |
eb1f0e66 KS |
1026 | } |
1027 | ||
1028 | /** | |
1029 | * udev_device_unref: | |
1030 | * @udev_device: udev device | |
1031 | * | |
1032 | * Drop a reference of a udev device. If the refcount reaches zero, | |
be7de409 | 1033 | * the resources of the device will be released. |
eb1f0e66 KS |
1034 | * |
1035 | **/ | |
666fcf03 | 1036 | UDEV_EXPORT void udev_device_unref(struct udev_device *udev_device) |
eb1f0e66 | 1037 | { |
912541b0 KS |
1038 | if (udev_device == NULL) |
1039 | return; | |
1040 | udev_device->refcount--; | |
1041 | if (udev_device->refcount > 0) | |
1042 | return; | |
1043 | if (udev_device->parent_device != NULL) | |
1044 | udev_device_unref(udev_device->parent_device); | |
1045 | free(udev_device->syspath); | |
1046 | free(udev_device->sysname); | |
1047 | free(udev_device->devnode); | |
1048 | free(udev_device->subsystem); | |
1049 | free(udev_device->devtype); | |
1050 | udev_list_cleanup(&udev_device->devlinks_list); | |
1051 | udev_list_cleanup(&udev_device->properties_list); | |
1052 | udev_list_cleanup(&udev_device->sysattr_value_list); | |
1053 | udev_list_cleanup(&udev_device->sysattr_list); | |
1054 | udev_list_cleanup(&udev_device->tags_list); | |
1055 | free(udev_device->action); | |
1056 | free(udev_device->driver); | |
1057 | free(udev_device->devpath_old); | |
1058 | free(udev_device->id_filename); | |
1059 | free(udev_device->envp); | |
1060 | free(udev_device->monitor_buf); | |
1061 | dbg(udev_device->udev, "udev_device: %p released\n", udev_device); | |
1062 | free(udev_device); | |
eb1f0e66 KS |
1063 | } |
1064 | ||
1065 | /** | |
1066 | * udev_device_get_devpath: | |
1067 | * @udev_device: udev device | |
1068 | * | |
11d543c1 KS |
1069 | * Retrieve the kernel devpath value of the udev device. The path |
1070 | * does not contain the sys mount point, and starts with a '/'. | |
eb1f0e66 | 1071 | * |
11d543c1 | 1072 | * Returns: the devpath of the udev device |
eb1f0e66 | 1073 | **/ |
666fcf03 | 1074 | UDEV_EXPORT const char *udev_device_get_devpath(struct udev_device *udev_device) |
eb1f0e66 | 1075 | { |
912541b0 KS |
1076 | if (udev_device == NULL) |
1077 | return NULL; | |
1078 | return udev_device->devpath; | |
eb1f0e66 KS |
1079 | } |
1080 | ||
11d543c1 KS |
1081 | /** |
1082 | * udev_device_get_syspath: | |
1083 | * @udev_device: udev device | |
1084 | * | |
1085 | * Retrieve the sys path of the udev device. The path is an | |
1086 | * absolute path and starts with the sys mount point. | |
1087 | * | |
1088 | * Returns: the sys path of the udev device | |
1089 | **/ | |
666fcf03 | 1090 | UDEV_EXPORT const char *udev_device_get_syspath(struct udev_device *udev_device) |
11d543c1 | 1091 | { |
912541b0 KS |
1092 | if (udev_device == NULL) |
1093 | return NULL; | |
1094 | return udev_device->syspath; | |
11d543c1 KS |
1095 | } |
1096 | ||
1e511322 KS |
1097 | /** |
1098 | * udev_device_get_sysname: | |
1099 | * @udev_device: udev device | |
1100 | * | |
1101 | * Returns: the sys name of the device device | |
1102 | **/ | |
666fcf03 | 1103 | UDEV_EXPORT const char *udev_device_get_sysname(struct udev_device *udev_device) |
4ad3a37f | 1104 | { |
912541b0 KS |
1105 | if (udev_device == NULL) |
1106 | return NULL; | |
1107 | return udev_device->sysname; | |
4ad3a37f KS |
1108 | } |
1109 | ||
1e511322 KS |
1110 | /** |
1111 | * udev_device_get_sysnum: | |
1112 | * @udev_device: udev device | |
1113 | * | |
1114 | * Returns: the trailing number of of the device name | |
1115 | **/ | |
666fcf03 | 1116 | UDEV_EXPORT const char *udev_device_get_sysnum(struct udev_device *udev_device) |
517814e7 | 1117 | { |
912541b0 KS |
1118 | if (udev_device == NULL) |
1119 | return NULL; | |
1120 | return udev_device->sysnum; | |
517814e7 KS |
1121 | } |
1122 | ||
eb1f0e66 | 1123 | /** |
fb762bb9 | 1124 | * udev_device_get_devnode: |
eb1f0e66 KS |
1125 | * @udev_device: udev device |
1126 | * | |
1127 | * Retrieve the device node file name belonging to the udev device. | |
ba6929f6 | 1128 | * The path is an absolute path, and starts with the device directory. |
eb1f0e66 KS |
1129 | * |
1130 | * Returns: the device node file name of the udev device, or #NULL if no device node exists | |
1131 | **/ | |
666fcf03 | 1132 | UDEV_EXPORT const char *udev_device_get_devnode(struct udev_device *udev_device) |
eb1f0e66 | 1133 | { |
912541b0 KS |
1134 | if (udev_device == NULL) |
1135 | return NULL; | |
1136 | if (udev_device->devnode != NULL) | |
1137 | return udev_device->devnode; | |
1138 | if (!udev_device->info_loaded) | |
1139 | udev_device_read_uevent_file(udev_device); | |
1140 | return udev_device->devnode; | |
eb1f0e66 KS |
1141 | } |
1142 | ||
eb1f0e66 | 1143 | /** |
0de33a61 | 1144 | * udev_device_get_devlinks_list_entry: |
eb1f0e66 | 1145 | * @udev_device: udev device |
eb1f0e66 | 1146 | * |
bf7ad0ea KS |
1147 | * Retrieve the list of device links pointing to the device file of |
1148 | * the udev device. The next list entry can be retrieved with | |
e345e267 | 1149 | * udev_list_entry_next(), which returns #NULL if no more entries exist. |
bf7ad0ea | 1150 | * The devlink path can be retrieved from the list entry by |
e345e267 | 1151 | * udev_list_entry_get_name(). The path is an absolute path, and starts with |
bf7ad0ea | 1152 | * the device directory. |
eb1f0e66 | 1153 | * |
bf7ad0ea | 1154 | * Returns: the first entry of the device node link list |
eb1f0e66 | 1155 | **/ |
666fcf03 | 1156 | UDEV_EXPORT struct udev_list_entry *udev_device_get_devlinks_list_entry(struct udev_device *udev_device) |
eb1f0e66 | 1157 | { |
912541b0 KS |
1158 | if (udev_device == NULL) |
1159 | return NULL; | |
1160 | if (!udev_device->info_loaded) | |
1161 | udev_device_read_db(udev_device, NULL); | |
1162 | return udev_list_get_entry(&udev_device->devlinks_list); | |
eb1f0e66 KS |
1163 | } |
1164 | ||
979ff016 KS |
1165 | void udev_device_cleanup_devlinks_list(struct udev_device *udev_device) |
1166 | { | |
912541b0 KS |
1167 | udev_device->devlinks_uptodate = false; |
1168 | udev_list_cleanup(&udev_device->devlinks_list); | |
979ff016 KS |
1169 | } |
1170 | ||
eb1f0e66 | 1171 | /** |
0de33a61 | 1172 | * udev_device_get_properties_list_entry: |
eb1f0e66 | 1173 | * @udev_device: udev device |
eb1f0e66 | 1174 | * |
bf7ad0ea | 1175 | * Retrieve the list of key/value device properties of the udev |
e345e267 | 1176 | * device. The next list entry can be retrieved with udev_list_entry_next(), |
bf7ad0ea KS |
1177 | * which returns #NULL if no more entries exist. The property name |
1178 | * can be retrieved from the list entry by udev_list_get_name(), | |
1179 | * the property value by udev_list_get_value(). | |
eb1f0e66 | 1180 | * |
bf7ad0ea | 1181 | * Returns: the first entry of the property list |
eb1f0e66 | 1182 | **/ |
666fcf03 | 1183 | UDEV_EXPORT struct udev_list_entry *udev_device_get_properties_list_entry(struct udev_device *udev_device) |
eb1f0e66 | 1184 | { |
912541b0 KS |
1185 | if (udev_device == NULL) |
1186 | return NULL; | |
1187 | if (!udev_device->info_loaded) { | |
1188 | udev_device_read_uevent_file(udev_device); | |
1189 | udev_device_read_db(udev_device, NULL); | |
1190 | } | |
1191 | if (!udev_device->devlinks_uptodate) { | |
1192 | char symlinks[UTIL_PATH_SIZE]; | |
1193 | struct udev_list_entry *list_entry; | |
1194 | ||
1195 | udev_device->devlinks_uptodate = true; | |
1196 | list_entry = udev_device_get_devlinks_list_entry(udev_device); | |
1197 | if (list_entry != NULL) { | |
1198 | char *s; | |
1199 | size_t l; | |
1200 | ||
1201 | s = symlinks; | |
1202 | l = util_strpcpyl(&s, sizeof(symlinks), udev_list_entry_get_name(list_entry), NULL); | |
1203 | udev_list_entry_foreach(list_entry, udev_list_entry_get_next(list_entry)) | |
1204 | l = util_strpcpyl(&s, l, " ", udev_list_entry_get_name(list_entry), NULL); | |
1205 | udev_device_add_property(udev_device, "DEVLINKS", symlinks); | |
1206 | } | |
1207 | } | |
1208 | if (!udev_device->tags_uptodate) { | |
1209 | udev_device->tags_uptodate = true; | |
1210 | if (udev_device_get_tags_list_entry(udev_device) != NULL) { | |
1211 | char tags[UTIL_PATH_SIZE]; | |
1212 | struct udev_list_entry *list_entry; | |
1213 | char *s; | |
1214 | size_t l; | |
1215 | ||
1216 | s = tags; | |
1217 | l = util_strpcpyl(&s, sizeof(tags), ":", NULL); | |
1218 | udev_list_entry_foreach(list_entry, udev_device_get_tags_list_entry(udev_device)) | |
1219 | l = util_strpcpyl(&s, l, udev_list_entry_get_name(list_entry), ":", NULL); | |
1220 | udev_device_add_property(udev_device, "TAGS", tags); | |
1221 | } | |
1222 | } | |
1223 | return udev_list_get_entry(&udev_device->properties_list); | |
eb1f0e66 | 1224 | } |
11d543c1 | 1225 | |
1e511322 KS |
1226 | /** |
1227 | * udev_device_get_action: | |
1228 | * @udev_device: udev device | |
1229 | * | |
1230 | * This is only valid if the device was received through a monitor. Devices read from | |
1231 | * sys do not have an action string. Usual actions are: add, remove, change, online, | |
1232 | * offline. | |
1233 | * | |
1234 | * Returns: the kernel action value, or #NULL if there is no action value available. | |
1235 | **/ | |
666fcf03 | 1236 | UDEV_EXPORT const char *udev_device_get_action(struct udev_device *udev_device) |
c4f5f942 | 1237 | { |
912541b0 KS |
1238 | if (udev_device == NULL) |
1239 | return NULL; | |
1240 | return udev_device->action; | |
c4f5f942 KS |
1241 | } |
1242 | ||
9c6a11b1 KS |
1243 | /** |
1244 | * udev_device_get_usec_since_initialized: | |
1245 | * @udev_device: udev device | |
1246 | * | |
1247 | * Return the number of microseconds passed since udev set up the | |
1248 | * device for the first time. | |
1249 | * | |
1250 | * This is only implemented for devices with need to store properties | |
1251 | * in the udev database. All other devices return 0 here. | |
1252 | * | |
1253 | * Returns: the number of microseconds since the device was first seen. | |
1254 | **/ | |
666fcf03 | 1255 | UDEV_EXPORT unsigned long long int udev_device_get_usec_since_initialized(struct udev_device *udev_device) |
9c6a11b1 | 1256 | { |
912541b0 | 1257 | unsigned long long now; |
9c6a11b1 | 1258 | |
912541b0 KS |
1259 | if (udev_device == NULL) |
1260 | return 0; | |
1261 | if (!udev_device->info_loaded) | |
1262 | udev_device_read_db(udev_device, NULL); | |
1263 | if (udev_device->usec_initialized == 0) | |
1264 | return 0; | |
1265 | now = now_usec(); | |
1266 | if (now == 0) | |
1267 | return 0; | |
1268 | return now - udev_device->usec_initialized; | |
9c6a11b1 KS |
1269 | } |
1270 | ||
1271 | unsigned long long udev_device_get_usec_initialized(struct udev_device *udev_device) | |
1272 | { | |
912541b0 | 1273 | return udev_device->usec_initialized; |
9c6a11b1 KS |
1274 | } |
1275 | ||
1276 | void udev_device_set_usec_initialized(struct udev_device *udev_device, unsigned long long usec_initialized) | |
1277 | { | |
912541b0 | 1278 | char num[32]; |
a20a57a7 | 1279 | |
912541b0 KS |
1280 | udev_device->usec_initialized = usec_initialized; |
1281 | snprintf(num, sizeof(num), "%llu", usec_initialized); | |
1282 | udev_device_add_property(udev_device, "USEC_INITIALIZED", num); | |
9c6a11b1 KS |
1283 | } |
1284 | ||
1e511322 KS |
1285 | /** |
1286 | * udev_device_get_sysattr_value: | |
1287 | * @udev_device: udev device | |
1288 | * @sysattr: attribute name | |
1289 | * | |
456719b6 | 1290 | * The retrieved value is cached in the device. Repeated calls will return the same |
1e511322 KS |
1291 | * value and not open the attribute again. |
1292 | * | |
1293 | * Returns: the content of a sys attribute file, or #NULL if there is no sys attribute value. | |
1294 | **/ | |
666fcf03 | 1295 | UDEV_EXPORT const char *udev_device_get_sysattr_value(struct udev_device *udev_device, const char *sysattr) |
93b0f384 | 1296 | { |
912541b0 KS |
1297 | struct udev_list_entry *list_entry; |
1298 | char path[UTIL_PATH_SIZE]; | |
1299 | char value[4096]; | |
1300 | struct stat statbuf; | |
1301 | int fd; | |
1302 | ssize_t size; | |
1303 | const char *val = NULL; | |
1304 | ||
1305 | if (udev_device == NULL) | |
1306 | return NULL; | |
1307 | if (sysattr == NULL) | |
1308 | return NULL; | |
1309 | ||
1310 | /* look for possibly already cached result */ | |
1311 | list_entry = udev_list_get_entry(&udev_device->sysattr_value_list); | |
1312 | list_entry = udev_list_entry_get_by_name(list_entry, sysattr); | |
1313 | if (list_entry != NULL) { | |
1314 | dbg(udev_device->udev, "got '%s' (%s) from cache\n", | |
1315 | sysattr, udev_list_entry_get_value(list_entry)); | |
1316 | return udev_list_entry_get_value(list_entry); | |
1317 | } | |
1318 | ||
1319 | util_strscpyl(path, sizeof(path), udev_device_get_syspath(udev_device), "/", sysattr, NULL); | |
1320 | if (lstat(path, &statbuf) != 0) { | |
1321 | dbg(udev_device->udev, "no attribute '%s', keep negative entry\n", path); | |
1322 | udev_list_entry_add(&udev_device->sysattr_value_list, sysattr, NULL); | |
1323 | goto out; | |
1324 | } | |
1325 | ||
1326 | if (S_ISLNK(statbuf.st_mode)) { | |
1327 | struct udev_device *dev; | |
1328 | ||
1329 | /* | |
1330 | * Some core links return only the last element of the target path, | |
1331 | * these are just values, the paths should not be exposed. | |
1332 | */ | |
1333 | if (strcmp(sysattr, "driver") == 0 || | |
1334 | strcmp(sysattr, "subsystem") == 0 || | |
1335 | strcmp(sysattr, "module") == 0) { | |
1336 | if (util_get_sys_core_link_value(udev_device->udev, sysattr, | |
1337 | udev_device->syspath, value, sizeof(value)) < 0) | |
1338 | return NULL; | |
1339 | dbg(udev_device->udev, "cache '%s' with link value '%s'\n", sysattr, value); | |
1340 | list_entry = udev_list_entry_add(&udev_device->sysattr_value_list, sysattr, value); | |
1341 | val = udev_list_entry_get_value(list_entry); | |
1342 | goto out; | |
1343 | } | |
1344 | ||
1345 | /* resolve link to a device and return its syspath */ | |
1346 | util_strscpyl(path, sizeof(path), udev_device->syspath, "/", sysattr, NULL); | |
1347 | dev = udev_device_new_from_syspath(udev_device->udev, path); | |
1348 | if (dev != NULL) { | |
1349 | list_entry = udev_list_entry_add(&udev_device->sysattr_value_list, sysattr, | |
1350 | udev_device_get_syspath(dev)); | |
1351 | val = udev_list_entry_get_value(list_entry); | |
1352 | udev_device_unref(dev); | |
1353 | } | |
1354 | ||
1355 | goto out; | |
1356 | } | |
1357 | ||
1358 | /* skip directories */ | |
1359 | if (S_ISDIR(statbuf.st_mode)) | |
1360 | goto out; | |
1361 | ||
1362 | /* skip non-readable files */ | |
1363 | if ((statbuf.st_mode & S_IRUSR) == 0) | |
1364 | goto out; | |
1365 | ||
1366 | /* read attribute value */ | |
1367 | fd = open(path, O_RDONLY|O_CLOEXEC); | |
1368 | if (fd < 0) { | |
1369 | dbg(udev_device->udev, "attribute '%s' can not be opened\n", path); | |
1370 | goto out; | |
1371 | } | |
1372 | size = read(fd, value, sizeof(value)); | |
1373 | close(fd); | |
1374 | if (size < 0) | |
1375 | goto out; | |
1376 | if (size == sizeof(value)) | |
1377 | goto out; | |
1378 | ||
1379 | /* got a valid value, store it in cache and return it */ | |
1380 | value[size] = '\0'; | |
1381 | util_remove_trailing_chars(value, '\n'); | |
1382 | dbg(udev_device->udev, "'%s' has attribute value '%s'\n", path, value); | |
1383 | list_entry = udev_list_entry_add(&udev_device->sysattr_value_list, sysattr, value); | |
1384 | val = udev_list_entry_get_value(list_entry); | |
93b0f384 | 1385 | out: |
912541b0 | 1386 | return val; |
93b0f384 | 1387 | } |
517814e7 | 1388 | |
20bee04c | 1389 | static int udev_device_sysattr_list_read(struct udev_device *udev_device) |
f180ad25 | 1390 | { |
912541b0 KS |
1391 | struct dirent *dent; |
1392 | DIR *dir; | |
1393 | int num = 0; | |
f180ad25 | 1394 | |
912541b0 KS |
1395 | if (udev_device == NULL) |
1396 | return -1; | |
1397 | if (udev_device->sysattr_list_read) | |
1398 | return 0; | |
f180ad25 | 1399 | |
912541b0 KS |
1400 | dir = opendir(udev_device_get_syspath(udev_device)); |
1401 | if (!dir) { | |
1402 | dbg(udev_device->udev, "sysfs dir '%s' can not be opened\n", | |
1403 | udev_device_get_syspath(udev_device)); | |
1404 | return -1; | |
1405 | } | |
f180ad25 | 1406 | |
912541b0 KS |
1407 | for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) { |
1408 | char path[UTIL_PATH_SIZE]; | |
1409 | struct stat statbuf; | |
f180ad25 | 1410 | |
912541b0 KS |
1411 | /* only handle symlinks and regular files */ |
1412 | if (dent->d_type != DT_LNK && dent->d_type != DT_REG) | |
1413 | continue; | |
f180ad25 | 1414 | |
912541b0 KS |
1415 | util_strscpyl(path, sizeof(path), udev_device_get_syspath(udev_device), "/", dent->d_name, NULL); |
1416 | if (lstat(path, &statbuf) != 0) | |
1417 | continue; | |
1418 | if ((statbuf.st_mode & S_IRUSR) == 0) | |
1419 | continue; | |
f180ad25 | 1420 | |
912541b0 KS |
1421 | udev_list_entry_add(&udev_device->sysattr_list, dent->d_name, NULL); |
1422 | num++; | |
1423 | } | |
f180ad25 | 1424 | |
912541b0 KS |
1425 | closedir(dir); |
1426 | dbg(udev_device->udev, "found %d sysattrs for '%s'\n", num, udev_device_get_syspath(udev_device)); | |
1427 | udev_device->sysattr_list_read = true; | |
f180ad25 | 1428 | |
912541b0 | 1429 | return num; |
f180ad25 TE |
1430 | } |
1431 | ||
1432 | /** | |
1433 | * udev_device_get_sysattr_list_entry: | |
1434 | * @udev_device: udev device | |
1435 | * | |
1436 | * Retrieve the list of available sysattrs, with value being empty; | |
20bee04c KS |
1437 | * This just return all available sysfs attributes for a particular |
1438 | * device without reading their values. | |
f180ad25 TE |
1439 | * |
1440 | * Returns: the first entry of the property list | |
1441 | **/ | |
666fcf03 | 1442 | UDEV_EXPORT struct udev_list_entry *udev_device_get_sysattr_list_entry(struct udev_device *udev_device) |
f180ad25 | 1443 | { |
912541b0 KS |
1444 | if (!udev_device->sysattr_list_read) { |
1445 | int ret; | |
1446 | ret = udev_device_sysattr_list_read(udev_device); | |
1447 | if (0 > ret) | |
1448 | return NULL; | |
1449 | } | |
f180ad25 | 1450 | |
912541b0 | 1451 | return udev_list_get_entry(&udev_device->sysattr_list); |
f180ad25 TE |
1452 | } |
1453 | ||
8cd2e972 | 1454 | int udev_device_set_syspath(struct udev_device *udev_device, const char *syspath) |
11d543c1 | 1455 | { |
912541b0 KS |
1456 | const char *pos; |
1457 | size_t len; | |
8753fadf | 1458 | |
912541b0 KS |
1459 | free(udev_device->syspath); |
1460 | udev_device->syspath = strdup(syspath); | |
1461 | if (udev_device->syspath == NULL) | |
1462 | return -ENOMEM; | |
1463 | udev_device->devpath = &udev_device->syspath[strlen(udev_get_sys_path(udev_device->udev))]; | |
1464 | udev_device_add_property(udev_device, "DEVPATH", udev_device->devpath); | |
517814e7 | 1465 | |
912541b0 KS |
1466 | pos = strrchr(udev_device->syspath, '/'); |
1467 | if (pos == NULL) | |
1468 | return -EINVAL; | |
1469 | udev_device->sysname = strdup(&pos[1]); | |
1470 | if (udev_device->sysname == NULL) | |
1471 | return -ENOMEM; | |
517814e7 | 1472 | |
912541b0 KS |
1473 | /* some devices have '!' in their name, change that to '/' */ |
1474 | len = 0; | |
1475 | while (udev_device->sysname[len] != '\0') { | |
1476 | if (udev_device->sysname[len] == '!') | |
1477 | udev_device->sysname[len] = '/'; | |
1478 | len++; | |
1479 | } | |
517814e7 | 1480 | |
912541b0 KS |
1481 | /* trailing number */ |
1482 | while (len > 0 && isdigit(udev_device->sysname[--len])) | |
1483 | udev_device->sysnum = &udev_device->sysname[len]; | |
babcf3cb | 1484 | |
912541b0 KS |
1485 | /* sysname is completely numeric */ |
1486 | if (len == 0) | |
1487 | udev_device->sysnum = NULL; | |
babcf3cb | 1488 | |
912541b0 | 1489 | return 0; |
11d543c1 KS |
1490 | } |
1491 | ||
8cd2e972 | 1492 | int udev_device_set_devnode(struct udev_device *udev_device, const char *devnode) |
11d543c1 | 1493 | { |
912541b0 KS |
1494 | free(udev_device->devnode); |
1495 | if (devnode[0] != '/') { | |
1496 | if (asprintf(&udev_device->devnode, "%s/%s", udev_get_dev_path(udev_device->udev), devnode) < 0) | |
1497 | udev_device->devnode = NULL; | |
1498 | } else { | |
1499 | udev_device->devnode = strdup(devnode); | |
1500 | } | |
1501 | if (udev_device->devnode == NULL) | |
1502 | return -ENOMEM; | |
1503 | udev_device_add_property(udev_device, "DEVNAME", udev_device->devnode); | |
1504 | return 0; | |
11d543c1 KS |
1505 | } |
1506 | ||
6c29f2b9 | 1507 | int udev_device_add_devlink(struct udev_device *udev_device, const char *devlink, int unique) |
11d543c1 | 1508 | { |
912541b0 | 1509 | struct udev_list_entry *list_entry; |
6c29f2b9 | 1510 | |
912541b0 KS |
1511 | udev_device->devlinks_uptodate = false; |
1512 | list_entry = udev_list_entry_add(&udev_device->devlinks_list, devlink, NULL); | |
1513 | if (list_entry == NULL) | |
1514 | return -ENOMEM; | |
1515 | if (unique) | |
1516 | udev_list_entry_set_num(list_entry, true); | |
1517 | return 0; | |
11d543c1 KS |
1518 | } |
1519 | ||
4281da1f KS |
1520 | const char *udev_device_get_id_filename(struct udev_device *udev_device) |
1521 | { | |
912541b0 KS |
1522 | if (udev_device->id_filename == NULL) { |
1523 | if (udev_device_get_subsystem(udev_device) == NULL) | |
1524 | return NULL; | |
1525 | ||
1526 | if (major(udev_device_get_devnum(udev_device)) > 0) { | |
1527 | /* use dev_t -- b259:131072, c254:0 */ | |
1528 | if (asprintf(&udev_device->id_filename, "%c%u:%u", | |
1529 | strcmp(udev_device_get_subsystem(udev_device), "block") == 0 ? 'b' : 'c', | |
1530 | major(udev_device_get_devnum(udev_device)), | |
1531 | minor(udev_device_get_devnum(udev_device))) < 0) | |
1532 | udev_device->id_filename = NULL; | |
1533 | } else if (udev_device_get_ifindex(udev_device) > 0) { | |
1534 | /* use netdev ifindex -- n3 */ | |
1535 | if (asprintf(&udev_device->id_filename, "n%u", udev_device_get_ifindex(udev_device)) < 0) | |
1536 | udev_device->id_filename = NULL; | |
1537 | } else { | |
1538 | /* | |
1539 | * use $subsys:$syname -- pci:0000:00:1f.2 | |
1540 | * sysname() has '!' translated, get it from devpath | |
1541 | */ | |
1542 | const char *sysname; | |
1543 | sysname = strrchr(udev_device->devpath, '/'); | |
1544 | if (sysname == NULL) | |
1545 | return NULL; | |
1546 | sysname = &sysname[1]; | |
1547 | if (asprintf(&udev_device->id_filename, "+%s:%s", udev_device_get_subsystem(udev_device), sysname) < 0) | |
1548 | udev_device->id_filename = NULL; | |
1549 | } | |
1550 | } | |
1551 | return udev_device->id_filename; | |
4281da1f KS |
1552 | } |
1553 | ||
48a0170b KS |
1554 | /** |
1555 | * udev_device_get_is_initialized: | |
1556 | * @udev_device: udev device | |
1557 | * | |
1558 | * Check if udev has already handled the device and has set up | |
1559 | * device node permissions and context, or has renamed a network | |
1560 | * device. | |
1561 | * | |
9c6a11b1 | 1562 | * This is only implemented for devices with a device node |
48a0170b KS |
1563 | * or network interfaces. All other devices return 1 here. |
1564 | * | |
1565 | * Returns: 1 if the device is set up. 0 otherwise. | |
1566 | **/ | |
666fcf03 | 1567 | UDEV_EXPORT int udev_device_get_is_initialized(struct udev_device *udev_device) |
48a0170b | 1568 | { |
912541b0 KS |
1569 | if (!udev_device->info_loaded) |
1570 | udev_device_read_db(udev_device, NULL); | |
1571 | return udev_device->is_initialized; | |
48a0170b KS |
1572 | } |
1573 | ||
1574 | void udev_device_set_is_initialized(struct udev_device *udev_device) | |
1575 | { | |
912541b0 | 1576 | udev_device->is_initialized = true; |
48a0170b KS |
1577 | } |
1578 | ||
28460195 KS |
1579 | int udev_device_add_tag(struct udev_device *udev_device, const char *tag) |
1580 | { | |
912541b0 KS |
1581 | if (strchr(tag, ':') != NULL || strchr(tag, ' ') != NULL) |
1582 | return -EINVAL; | |
1583 | udev_device->tags_uptodate = false; | |
1584 | if (udev_list_entry_add(&udev_device->tags_list, tag, NULL) != NULL) | |
1585 | return 0; | |
1586 | return -ENOMEM; | |
28460195 KS |
1587 | } |
1588 | ||
1589 | void udev_device_cleanup_tags_list(struct udev_device *udev_device) | |
1590 | { | |
912541b0 KS |
1591 | udev_device->tags_uptodate = false; |
1592 | udev_list_cleanup(&udev_device->tags_list); | |
28460195 KS |
1593 | } |
1594 | ||
f712894d KS |
1595 | /** |
1596 | * udev_device_get_tags_list_entry: | |
1597 | * @udev_device: udev device | |
1598 | * | |
1599 | * Retrieve the list of tags attached to the udev device. The next | |
1600 | * list entry can be retrieved with udev_list_entry_next(), | |
1601 | * which returns #NULL if no more entries exist. The tag string | |
1602 | * can be retrieved from the list entry by udev_list_get_name(). | |
1603 | * | |
1604 | * Returns: the first entry of the tag list | |
1605 | **/ | |
666fcf03 | 1606 | UDEV_EXPORT struct udev_list_entry *udev_device_get_tags_list_entry(struct udev_device *udev_device) |
28460195 | 1607 | { |
912541b0 KS |
1608 | if (udev_device == NULL) |
1609 | return NULL; | |
1610 | if (!udev_device->info_loaded) | |
1611 | udev_device_read_db(udev_device, NULL); | |
1612 | return udev_list_get_entry(&udev_device->tags_list); | |
28460195 KS |
1613 | } |
1614 | ||
5433b732 | 1615 | UDEV_EXPORT int udev_device_has_tag(struct udev_device *udev_device, const char *tag) |
28460195 | 1616 | { |
912541b0 | 1617 | struct udev_list_entry *list_entry; |
28460195 | 1618 | |
912541b0 KS |
1619 | if (udev_device == NULL) |
1620 | return false; | |
1621 | if (!udev_device->info_loaded) | |
1622 | udev_device_read_db(udev_device, NULL); | |
1623 | list_entry = udev_device_get_tags_list_entry(udev_device); | |
1624 | if (udev_list_entry_get_by_name(list_entry, tag) != NULL) | |
1625 | return true; | |
1626 | return false; | |
28460195 KS |
1627 | } |
1628 | ||
912541b0 KS |
1629 | #define ENVP_SIZE 128 |
1630 | #define MONITOR_BUF_SIZE 4096 | |
6493e655 | 1631 | static int update_envp_monitor_buf(struct udev_device *udev_device) |
979ff016 | 1632 | { |
912541b0 KS |
1633 | struct udev_list_entry *list_entry; |
1634 | char *s; | |
1635 | size_t l; | |
1636 | unsigned int i; | |
1637 | ||
1638 | /* monitor buffer of property strings */ | |
1639 | free(udev_device->monitor_buf); | |
1640 | udev_device->monitor_buf_len = 0; | |
1641 | udev_device->monitor_buf = malloc(MONITOR_BUF_SIZE); | |
1642 | if (udev_device->monitor_buf == NULL) | |
1643 | return -ENOMEM; | |
1644 | ||
1645 | /* envp array, strings will point into monitor buffer */ | |
1646 | if (udev_device->envp == NULL) | |
1647 | udev_device->envp = malloc(sizeof(char *) * ENVP_SIZE); | |
1648 | if (udev_device->envp == NULL) | |
1649 | return -ENOMEM; | |
1650 | ||
1651 | i = 0; | |
1652 | s = udev_device->monitor_buf; | |
1653 | l = MONITOR_BUF_SIZE; | |
1654 | udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(udev_device)) { | |
1655 | const char *key; | |
1656 | ||
1657 | key = udev_list_entry_get_name(list_entry); | |
1658 | /* skip private variables */ | |
1659 | if (key[0] == '.') | |
1660 | continue; | |
1661 | ||
1662 | /* add string to envp array */ | |
1663 | udev_device->envp[i++] = s; | |
1664 | if (i+1 >= ENVP_SIZE) | |
1665 | return -EINVAL; | |
1666 | ||
1667 | /* add property string to monitor buffer */ | |
1668 | l = util_strpcpyl(&s, l, key, "=", udev_list_entry_get_value(list_entry), NULL); | |
1669 | if (l == 0) | |
1670 | return -EINVAL; | |
1671 | /* advance past the trailing '\0' that util_strpcpyl() guarantees */ | |
1672 | s++; | |
1673 | l--; | |
1674 | } | |
1675 | udev_device->envp[i] = NULL; | |
1676 | udev_device->monitor_buf_len = s - udev_device->monitor_buf; | |
1677 | udev_device->envp_uptodate = true; | |
1678 | dbg(udev_device->udev, "filled envp/monitor buffer, %u properties, %zu bytes\n", | |
1679 | i, udev_device->monitor_buf_len); | |
1680 | return 0; | |
6493e655 KS |
1681 | } |
1682 | ||
1683 | char **udev_device_get_properties_envp(struct udev_device *udev_device) | |
1684 | { | |
912541b0 KS |
1685 | if (!udev_device->envp_uptodate) |
1686 | if (update_envp_monitor_buf(udev_device) != 0) | |
1687 | return NULL; | |
1688 | return udev_device->envp; | |
6493e655 KS |
1689 | } |
1690 | ||
1691 | ssize_t udev_device_get_properties_monitor_buf(struct udev_device *udev_device, const char **buf) | |
1692 | { | |
912541b0 KS |
1693 | if (!udev_device->envp_uptodate) |
1694 | if (update_envp_monitor_buf(udev_device) != 0) | |
1695 | return -EINVAL; | |
1696 | *buf = udev_device->monitor_buf; | |
1697 | return udev_device->monitor_buf_len; | |
c2654402 KS |
1698 | } |
1699 | ||
8cd2e972 | 1700 | int udev_device_set_action(struct udev_device *udev_device, const char *action) |
c4f5f942 | 1701 | { |
912541b0 KS |
1702 | free(udev_device->action); |
1703 | udev_device->action = strdup(action); | |
1704 | if (udev_device->action == NULL) | |
1705 | return -ENOMEM; | |
1706 | udev_device_add_property(udev_device, "ACTION", udev_device->action); | |
1707 | return 0; | |
c4f5f942 KS |
1708 | } |
1709 | ||
8cd2e972 | 1710 | int udev_device_get_devlink_priority(struct udev_device *udev_device) |
6bd1c78a | 1711 | { |
912541b0 KS |
1712 | if (!udev_device->info_loaded) |
1713 | udev_device_read_db(udev_device, NULL); | |
1714 | return udev_device->devlink_priority; | |
6bd1c78a KS |
1715 | } |
1716 | ||
8cd2e972 | 1717 | int udev_device_set_devlink_priority(struct udev_device *udev_device, int prio) |
6bd1c78a | 1718 | { |
912541b0 KS |
1719 | udev_device->devlink_priority = prio; |
1720 | return 0; | |
6bd1c78a KS |
1721 | } |
1722 | ||
d7ce7539 SJR |
1723 | int udev_device_get_watch_handle(struct udev_device *udev_device) |
1724 | { | |
912541b0 KS |
1725 | if (!udev_device->info_loaded) |
1726 | udev_device_read_db(udev_device, NULL); | |
1727 | return udev_device->watch_handle; | |
d7ce7539 SJR |
1728 | } |
1729 | ||
1730 | int udev_device_set_watch_handle(struct udev_device *udev_device, int handle) | |
1731 | { | |
912541b0 KS |
1732 | udev_device->watch_handle = handle; |
1733 | return 0; | |
d7ce7539 | 1734 | } |
fc416258 | 1735 | |
9ead6627 KS |
1736 | bool udev_device_get_db_persist(struct udev_device *udev_device) |
1737 | { | |
912541b0 | 1738 | return udev_device->db_persist; |
9ead6627 KS |
1739 | } |
1740 | ||
1741 | void udev_device_set_db_persist(struct udev_device *udev_device) | |
1742 | { | |
912541b0 | 1743 | udev_device->db_persist = true; |
9ead6627 | 1744 | } |