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Commit | Line | Data |
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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 { |
11d543c1 | 47 | struct udev *udev; |
b2d9e4f2 | 48 | struct udev_device *parent_device; |
11d543c1 | 49 | char *syspath; |
4ad3a37f | 50 | const char *devpath; |
517814e7 KS |
51 | char *sysname; |
52 | const char *sysnum; | |
99214844 | 53 | char *devnode; |
11d543c1 | 54 | char *subsystem; |
bf8b2ae1 | 55 | char *devtype; |
979ff016 | 56 | char *driver; |
c4f5f942 | 57 | char *action; |
c4f5f942 | 58 | char *devpath_old; |
2ffc9cc1 | 59 | char *sysname_old; |
cb14f454 | 60 | char *knodename; |
4281da1f | 61 | char *id_filename; |
6493e655 | 62 | char **envp; |
c2654402 KS |
63 | char *monitor_buf; |
64 | size_t monitor_buf_len; | |
b99028c9 KS |
65 | struct udev_list_node devlinks_list; |
66 | struct udev_list_node properties_list; | |
20bee04c | 67 | struct udev_list_node sysattr_value_list; |
b99028c9 | 68 | struct udev_list_node sysattr_list; |
28460195 | 69 | struct udev_list_node tags_list; |
6bd1c78a | 70 | unsigned long long int seqnum; |
9c6a11b1 | 71 | unsigned long long int usec_initialized; |
b99028c9 KS |
72 | int event_timeout; |
73 | int timeout; | |
e88a82b5 | 74 | int devlink_priority; |
b99028c9 KS |
75 | int refcount; |
76 | dev_t devnum; | |
fc416258 | 77 | int ifindex; |
d7ce7539 | 78 | int watch_handle; |
fc8d61c5 | 79 | int maj, min; |
28460195 KS |
80 | bool parent_set; |
81 | bool subsystem_set; | |
82 | bool devtype_set; | |
83 | bool devlinks_uptodate; | |
84 | bool envp_uptodate; | |
85 | bool tags_uptodate; | |
86 | bool driver_set; | |
87 | bool info_loaded; | |
88 | bool db_loaded; | |
89 | bool uevent_loaded; | |
48a0170b | 90 | bool is_initialized; |
20bee04c | 91 | bool sysattr_list_read; |
11d543c1 KS |
92 | }; |
93 | ||
fc8d61c5 KS |
94 | struct udev_list_entry *udev_device_add_property(struct udev_device *udev_device, const char *key, const char *value) |
95 | { | |
28460195 | 96 | udev_device->envp_uptodate = false; |
fc8d61c5 KS |
97 | if (value == NULL) { |
98 | struct udev_list_entry *list_entry; | |
99 | ||
100 | list_entry = udev_device_get_properties_list_entry(udev_device); | |
101 | list_entry = udev_list_entry_get_by_name(list_entry, key); | |
102 | if (list_entry != NULL) | |
103 | udev_list_entry_delete(list_entry); | |
104 | return NULL; | |
105 | } | |
106 | return udev_list_entry_add(udev_device->udev, &udev_device->properties_list, key, value, 1, 0); | |
107 | } | |
108 | ||
109 | static struct udev_list_entry *udev_device_add_property_from_string(struct udev_device *udev_device, const char *property) | |
110 | { | |
111 | char name[UTIL_LINE_SIZE]; | |
112 | char *val; | |
113 | ||
114 | util_strscpy(name, sizeof(name), property); | |
115 | val = strchr(name, '='); | |
116 | if (val == NULL) | |
117 | return NULL; | |
118 | val[0] = '\0'; | |
119 | val = &val[1]; | |
120 | if (val[0] == '\0') | |
121 | val = NULL; | |
122 | return udev_device_add_property(udev_device, name, val); | |
123 | } | |
124 | ||
125 | /* | |
126 | * parse property string, and if needed, update internal values accordingly | |
127 | * | |
128 | * udev_device_add_property_from_string_parse_finish() needs to be | |
129 | * called after adding properties, and its return value checked | |
130 | * | |
131 | * udev_device_set_info_loaded() needs to be set, to avoid trying | |
132 | * to use a device without a DEVPATH set | |
133 | */ | |
134 | void udev_device_add_property_from_string_parse(struct udev_device *udev_device, const char *property) | |
135 | { | |
136 | if (strncmp(property, "DEVPATH=", 8) == 0) { | |
137 | char path[UTIL_PATH_SIZE]; | |
138 | ||
139 | util_strscpyl(path, sizeof(path), udev_get_sys_path(udev_device->udev), &property[8], NULL); | |
140 | udev_device_set_syspath(udev_device, path); | |
141 | } else if (strncmp(property, "SUBSYSTEM=", 10) == 0) { | |
142 | udev_device_set_subsystem(udev_device, &property[10]); | |
143 | } else if (strncmp(property, "DEVTYPE=", 8) == 0) { | |
144 | udev_device_set_devtype(udev_device, &property[8]); | |
145 | } else if (strncmp(property, "DEVNAME=", 8) == 0) { | |
146 | if (property[8] == '/') | |
147 | udev_device_set_devnode(udev_device, &property[8]); | |
148 | else | |
149 | udev_device_set_knodename(udev_device, &property[8]); | |
150 | } else if (strncmp(property, "DEVLINKS=", 9) == 0) { | |
151 | char devlinks[UTIL_PATH_SIZE]; | |
152 | char *slink; | |
153 | char *next; | |
154 | ||
155 | util_strscpy(devlinks, sizeof(devlinks), &property[9]); | |
156 | slink = devlinks; | |
157 | next = strchr(slink, ' '); | |
158 | while (next != NULL) { | |
159 | next[0] = '\0'; | |
160 | udev_device_add_devlink(udev_device, slink, 0); | |
161 | slink = &next[1]; | |
162 | next = strchr(slink, ' '); | |
163 | } | |
164 | if (slink[0] != '\0') | |
165 | udev_device_add_devlink(udev_device, slink, 0); | |
28460195 KS |
166 | } else if (strncmp(property, "TAGS=", 5) == 0) { |
167 | char tags[UTIL_PATH_SIZE]; | |
168 | char *next; | |
169 | ||
170 | util_strscpy(tags, sizeof(tags), &property[5]); | |
171 | next = strchr(tags, ':'); | |
172 | if (next != NULL) { | |
173 | next++; | |
174 | while (next[0] != '\0') { | |
175 | char *tag; | |
176 | ||
177 | tag = next; | |
178 | next = strchr(tag, ':'); | |
179 | if (next == NULL) | |
180 | break; | |
181 | next[0] = '\0'; | |
182 | next++; | |
183 | udev_device_add_tag(udev_device, tag); | |
184 | } | |
185 | } | |
fc8d61c5 KS |
186 | } else if (strncmp(property, "DRIVER=", 7) == 0) { |
187 | udev_device_set_driver(udev_device, &property[7]); | |
188 | } else if (strncmp(property, "ACTION=", 7) == 0) { | |
189 | udev_device_set_action(udev_device, &property[7]); | |
190 | } else if (strncmp(property, "MAJOR=", 6) == 0) { | |
191 | udev_device->maj = strtoull(&property[6], NULL, 10); | |
192 | } else if (strncmp(property, "MINOR=", 6) == 0) { | |
193 | udev_device->min = strtoull(&property[6], NULL, 10); | |
194 | } else if (strncmp(property, "DEVPATH_OLD=", 12) == 0) { | |
195 | udev_device_set_devpath_old(udev_device, &property[12]); | |
196 | } else if (strncmp(property, "SEQNUM=", 7) == 0) { | |
197 | udev_device_set_seqnum(udev_device, strtoull(&property[7], NULL, 10)); | |
198 | } else if (strncmp(property, "TIMEOUT=", 8) == 0) { | |
199 | udev_device_set_timeout(udev_device, strtoull(&property[8], NULL, 10)); | |
fc416258 KS |
200 | } else if (strncmp(property, "IFINDEX=", 8) == 0) { |
201 | udev_device_set_ifindex(udev_device, strtoull(&property[8], NULL, 10)); | |
fc8d61c5 KS |
202 | } else { |
203 | udev_device_add_property_from_string(udev_device, property); | |
204 | } | |
205 | } | |
206 | ||
207 | int udev_device_add_property_from_string_parse_finish(struct udev_device *udev_device) | |
208 | { | |
209 | if (udev_device->maj > 0) | |
210 | udev_device_set_devnum(udev_device, makedev(udev_device->maj, udev_device->min)); | |
211 | udev_device->maj = 0; | |
212 | udev_device->min = 0; | |
213 | ||
214 | if (udev_device->devpath == NULL || udev_device->subsystem == NULL) | |
215 | return -EINVAL; | |
216 | return 0; | |
217 | } | |
218 | ||
219 | /** | |
220 | * udev_device_get_property_value: | |
221 | * @udev_device: udev device | |
222 | * @key: property name | |
223 | * | |
224 | * Returns: the value of a device property, or #NULL if there is no such property. | |
225 | **/ | |
226 | const char *udev_device_get_property_value(struct udev_device *udev_device, const char *key) | |
227 | { | |
228 | struct udev_list_entry *list_entry; | |
229 | ||
230 | if (udev_device == NULL) | |
231 | return NULL; | |
232 | if (key == NULL) | |
233 | return NULL; | |
234 | ||
235 | list_entry = udev_device_get_properties_list_entry(udev_device); | |
236 | list_entry = udev_list_entry_get_by_name(list_entry, key); | |
237 | return udev_list_entry_get_value(list_entry); | |
238 | } | |
239 | ||
5f59fa09 | 240 | int udev_device_read_db(struct udev_device *udev_device, const char *dbfile) |
e88a82b5 | 241 | { |
3eb46ec6 KS |
242 | char filename[UTIL_PATH_SIZE]; |
243 | char line[UTIL_LINE_SIZE]; | |
e88a82b5 | 244 | FILE *f; |
e88a82b5 | 245 | |
5f59fa09 KS |
246 | /* providing a database file will always force-load it */ |
247 | if (dbfile == NULL) { | |
248 | const char *id; | |
28460195 | 249 | |
5f59fa09 KS |
250 | if (udev_device->db_loaded) |
251 | return 0; | |
252 | udev_device->db_loaded = true; | |
253 | ||
254 | id = udev_device_get_id_filename(udev_device); | |
255 | if (id == NULL) | |
256 | return -1; | |
4ec9c3e7 | 257 | util_strscpyl(filename, sizeof(filename), udev_get_run_path(udev_device->udev), "/data/", id, NULL); |
5f59fa09 KS |
258 | dbfile = filename; |
259 | } | |
260 | ||
261 | f = fopen(dbfile, "re"); | |
e88a82b5 | 262 | if (f == NULL) { |
5f59fa09 | 263 | info(udev_device->udev, "no db file to read %s: %m\n", dbfile); |
e88a82b5 KS |
264 | return -1; |
265 | } | |
48a0170b | 266 | udev_device->is_initialized = true; |
bfd88b1d | 267 | |
e88a82b5 KS |
268 | while (fgets(line, sizeof(line), f)) { |
269 | ssize_t len; | |
270 | const char *val; | |
24d10766 | 271 | struct udev_list_entry *entry; |
e88a82b5 KS |
272 | |
273 | len = strlen(line); | |
274 | if (len < 4) | |
275 | break; | |
276 | line[len-1] = '\0'; | |
277 | val = &line[2]; | |
e88a82b5 KS |
278 | switch(line[0]) { |
279 | case 'N': | |
065db052 | 280 | util_strscpyl(filename, sizeof(filename), udev_get_dev_path(udev_device->udev), "/", val, NULL); |
517814e7 | 281 | udev_device_set_devnode(udev_device, filename); |
e88a82b5 | 282 | break; |
e88a82b5 | 283 | case 'S': |
065db052 | 284 | util_strscpyl(filename, sizeof(filename), udev_get_dev_path(udev_device->udev), "/", val, NULL); |
6c29f2b9 | 285 | udev_device_add_devlink(udev_device, filename, 0); |
e88a82b5 KS |
286 | break; |
287 | case 'L': | |
8cd2e972 | 288 | udev_device_set_devlink_priority(udev_device, atoi(val)); |
e88a82b5 | 289 | break; |
e88a82b5 | 290 | case 'E': |
24d10766 KS |
291 | entry = udev_device_add_property_from_string(udev_device, val); |
292 | udev_list_entry_set_flags(entry, 1); | |
e88a82b5 | 293 | break; |
28460195 KS |
294 | case 'G': |
295 | udev_device_add_tag(udev_device, val); | |
296 | break; | |
d7ce7539 SJR |
297 | case 'W': |
298 | udev_device_set_watch_handle(udev_device, atoi(val)); | |
299 | break; | |
9c6a11b1 KS |
300 | case 'I': |
301 | udev_device_set_usec_initialized(udev_device, strtoull(val, NULL, 10)); | |
302 | break; | |
e88a82b5 KS |
303 | } |
304 | } | |
305 | fclose(f); | |
306 | ||
cd42b50d | 307 | info(udev_device->udev, "device %p filled with db file data\n", udev_device); |
04f5d75f | 308 | return 0; |
e88a82b5 KS |
309 | } |
310 | ||
bd85566c | 311 | int udev_device_read_uevent_file(struct udev_device *udev_device) |
99214844 KS |
312 | { |
313 | char filename[UTIL_PATH_SIZE]; | |
314 | FILE *f; | |
315 | char line[UTIL_LINE_SIZE]; | |
316 | int maj = 0; | |
317 | int min = 0; | |
318 | ||
28460195 KS |
319 | if (udev_device->uevent_loaded) |
320 | return 0; | |
321 | ||
065db052 | 322 | util_strscpyl(filename, sizeof(filename), udev_device->syspath, "/uevent", NULL); |
0c5c4804 | 323 | f = fopen(filename, "re"); |
99214844 KS |
324 | if (f == NULL) |
325 | return -1; | |
bfd88b1d | 326 | udev_device->uevent_loaded = true; |
99214844 KS |
327 | |
328 | while (fgets(line, sizeof(line), f)) { | |
329 | char *pos; | |
330 | ||
331 | pos = strchr(line, '\n'); | |
332 | if (pos == NULL) | |
333 | continue; | |
334 | pos[0] = '\0'; | |
335 | ||
bf8b2ae1 MH |
336 | if (strncmp(line, "DEVTYPE=", 8) == 0) |
337 | udev_device_set_devtype(udev_device, &line[8]); | |
338 | else if (strncmp(line, "MAJOR=", 6) == 0) | |
99214844 KS |
339 | maj = strtoull(&line[6], NULL, 10); |
340 | else if (strncmp(line, "MINOR=", 6) == 0) | |
341 | min = strtoull(&line[6], NULL, 10); | |
fc416258 KS |
342 | else if (strncmp(line, "IFINDEX=", 8) == 0) |
343 | udev_device_set_ifindex(udev_device, strtoull(&line[8], NULL, 10)); | |
cb14f454 KS |
344 | else if (strncmp(line, "DEVNAME=", 8) == 0) |
345 | udev_device_set_knodename(udev_device, &line[8]); | |
99214844 | 346 | |
8cd2e972 | 347 | udev_device_add_property_from_string(udev_device, line); |
99214844 KS |
348 | } |
349 | ||
350 | udev_device->devnum = makedev(maj, min); | |
99214844 KS |
351 | fclose(f); |
352 | return 0; | |
353 | } | |
354 | ||
8cd2e972 | 355 | void udev_device_set_info_loaded(struct udev_device *device) |
99214844 | 356 | { |
28460195 | 357 | device->info_loaded = true; |
99214844 KS |
358 | } |
359 | ||
a5710160 | 360 | struct udev_device *udev_device_new(struct udev *udev) |
eb1f0e66 KS |
361 | { |
362 | struct udev_device *udev_device; | |
ebacd6ec | 363 | struct udev_list_entry *list_entry; |
eb1f0e66 | 364 | |
ba6929f6 KS |
365 | if (udev == NULL) |
366 | return NULL; | |
367 | ||
b29a5e4a | 368 | udev_device = calloc(1, sizeof(struct udev_device)); |
eb1f0e66 KS |
369 | if (udev_device == NULL) |
370 | return NULL; | |
eb1f0e66 KS |
371 | udev_device->refcount = 1; |
372 | udev_device->udev = udev; | |
517814e7 | 373 | udev_list_init(&udev_device->devlinks_list); |
8cd2e972 | 374 | udev_list_init(&udev_device->properties_list); |
20bee04c | 375 | udev_list_init(&udev_device->sysattr_value_list); |
69239210 | 376 | udev_list_init(&udev_device->sysattr_list); |
28460195 | 377 | udev_list_init(&udev_device->tags_list); |
979ff016 | 378 | udev_device->event_timeout = -1; |
d7ce7539 | 379 | udev_device->watch_handle = -1; |
ebacd6ec KS |
380 | /* copy global properties */ |
381 | udev_list_entry_foreach(list_entry, udev_get_properties_list_entry(udev)) | |
382 | udev_device_add_property(udev_device, | |
383 | udev_list_entry_get_name(list_entry), | |
384 | udev_list_entry_get_value(list_entry)); | |
86b57788 | 385 | dbg(udev_device->udev, "udev_device: %p created\n", udev_device); |
eb1f0e66 KS |
386 | return udev_device; |
387 | } | |
388 | ||
389 | /** | |
8753fadf | 390 | * udev_device_new_from_syspath: |
eb1f0e66 | 391 | * @udev: udev library context |
8753fadf | 392 | * @syspath: sys device path including sys directory |
eb1f0e66 | 393 | * |
8753fadf | 394 | * Create new udev device, and fill in information from the sys |
214a6c79 | 395 | * device and the udev database entry. The syspath is the absolute |
8753fadf | 396 | * path to the device, including the sys mount point. |
eb1f0e66 KS |
397 | * |
398 | * The initial refcount is 1, and needs to be decremented to | |
be7de409 | 399 | * release the resources of the udev device. |
eb1f0e66 KS |
400 | * |
401 | * Returns: a new udev device, or #NULL, if it does not exist | |
402 | **/ | |
8753fadf | 403 | struct udev_device *udev_device_new_from_syspath(struct udev *udev, const char *syspath) |
eb1f0e66 | 404 | { |
b95f8a76 KS |
405 | size_t len; |
406 | const char *subdir; | |
3eb46ec6 | 407 | char path[UTIL_PATH_SIZE]; |
62b9dfb6 | 408 | char *pos; |
eb1f0e66 KS |
409 | struct stat statbuf; |
410 | struct udev_device *udev_device; | |
eb1f0e66 | 411 | |
ba6929f6 KS |
412 | if (udev == NULL) |
413 | return NULL; | |
8753fadf | 414 | if (syspath == NULL) |
ba6929f6 KS |
415 | return NULL; |
416 | ||
b95f8a76 KS |
417 | /* path starts in sys */ |
418 | len = strlen(udev_get_sys_path(udev)); | |
419 | if (strncmp(syspath, udev_get_sys_path(udev), len) != 0) { | |
420 | info(udev, "not in sys :%s\n", syspath); | |
eb1f0e66 | 421 | return NULL; |
4ad3a37f | 422 | } |
eb1f0e66 | 423 | |
b95f8a76 KS |
424 | /* path is not a root directory */ |
425 | subdir = &syspath[len+1]; | |
426 | pos = strrchr(subdir, '/'); | |
f454f670 | 427 | if (pos == NULL || pos[1] == '\0' || pos < &subdir[2]) { |
86b57788 | 428 | dbg(udev, "not a subdir :%s\n", syspath); |
eb1f0e66 | 429 | return NULL; |
b95f8a76 | 430 | } |
eb1f0e66 | 431 | |
ba6929f6 | 432 | /* resolve possible symlink to real path */ |
065db052 | 433 | util_strscpy(path, sizeof(path), syspath); |
b21b95d7 | 434 | util_resolve_sys_link(udev, path, sizeof(path)); |
b95f8a76 | 435 | |
28460195 | 436 | if (strncmp(&path[len], "/devices/", 9) == 0) { |
b95f8a76 KS |
437 | char file[UTIL_PATH_SIZE]; |
438 | ||
439 | /* all "devices" require a "uevent" file */ | |
065db052 | 440 | util_strscpyl(file, sizeof(file), path, "/uevent", NULL); |
b95f8a76 | 441 | if (stat(file, &statbuf) != 0) { |
86b57788 | 442 | dbg(udev, "not a device: %s\n", syspath); |
b95f8a76 KS |
443 | return NULL; |
444 | } | |
445 | } else { | |
446 | /* everything else just needs to be a directory */ | |
447 | if (stat(path, &statbuf) != 0 || !S_ISDIR(statbuf.st_mode)) { | |
86b57788 | 448 | dbg(udev, "directory not found: %s\n", syspath); |
b95f8a76 KS |
449 | return NULL; |
450 | } | |
451 | } | |
452 | ||
a5710160 | 453 | udev_device = udev_device_new(udev); |
b95f8a76 KS |
454 | if (udev_device == NULL) |
455 | return NULL; | |
456 | ||
8cd2e972 | 457 | udev_device_set_syspath(udev_device, path); |
7d563a17 | 458 | info(udev, "device %p has devpath '%s'\n", udev_device, udev_device_get_devpath(udev_device)); |
eb1f0e66 | 459 | |
eb1f0e66 KS |
460 | return udev_device; |
461 | } | |
462 | ||
1e511322 KS |
463 | /** |
464 | * udev_device_new_from_devnum: | |
465 | * @udev: udev library context | |
466 | * @type: char or block device | |
467 | * @devnum: device major/minor number | |
468 | * | |
469 | * Create new udev device, and fill in information from the sys | |
dbba7e40 KS |
470 | * device and the udev database entry. The device is looked-up |
471 | * by its major/minor number and type. Character and block device | |
472 | * numbers are not unique across the two types. | |
1e511322 KS |
473 | * |
474 | * The initial refcount is 1, and needs to be decremented to | |
475 | * release the resources of the udev device. | |
476 | * | |
477 | * Returns: a new udev device, or #NULL, if it does not exist | |
478 | **/ | |
4c9dff47 KS |
479 | struct udev_device *udev_device_new_from_devnum(struct udev *udev, char type, dev_t devnum) |
480 | { | |
481 | char path[UTIL_PATH_SIZE]; | |
03198b93 KS |
482 | const char *type_str; |
483 | ||
484 | if (type == 'b') | |
485 | type_str = "block"; | |
486 | else if (type == 'c') | |
487 | type_str = "char"; | |
488 | else | |
489 | return NULL; | |
4c9dff47 | 490 | |
58b533f4 KS |
491 | /* use /sys/dev/{block,char}/<maj>:<min> link */ |
492 | snprintf(path, sizeof(path), "%s/dev/%s/%u:%u", | |
493 | udev_get_sys_path(udev), type_str, major(devnum), minor(devnum)); | |
494 | return udev_device_new_from_syspath(udev, path); | |
4c9dff47 KS |
495 | } |
496 | ||
cad40a5f KS |
497 | struct udev_device *udev_device_new_from_id_filename(struct udev *udev, char *id) |
498 | { | |
499 | char type; | |
500 | int maj, min; | |
501 | char subsys[UTIL_PATH_SIZE]; | |
502 | char *sysname; | |
503 | ||
504 | switch(id[0]) { | |
505 | case 'b': | |
506 | case 'c': | |
507 | if (sscanf(id, "%c%i:%i", &type, &maj, &min) != 3) | |
508 | return NULL; | |
509 | return udev_device_new_from_devnum(udev, type, makedev(maj, min)); | |
3e0a2c9a KS |
510 | case 'n': { |
511 | int sk; | |
512 | struct ifreq ifr; | |
513 | struct udev_device *dev; | |
514 | int ifindex; | |
515 | ||
516 | ifindex = strtoul(&id[1], NULL, 10); | |
517 | if (ifindex <= 0) | |
518 | return NULL; | |
519 | ||
520 | sk = socket(PF_INET, SOCK_DGRAM, 0); | |
521 | if (sk < 0) | |
522 | return NULL; | |
523 | memset(&ifr, 0x00, sizeof(struct ifreq)); | |
524 | ifr.ifr_ifindex = ifindex; | |
525 | if (ioctl(sk, SIOCGIFNAME, &ifr) != 0) { | |
526 | close(sk); | |
527 | return NULL; | |
528 | } | |
529 | close(sk); | |
530 | ||
531 | dev = udev_device_new_from_subsystem_sysname(udev, "net", ifr.ifr_name); | |
532 | if (dev == NULL) | |
533 | return NULL; | |
534 | if (udev_device_get_ifindex(dev) == ifindex) | |
535 | return dev; | |
536 | udev_device_unref(dev); | |
537 | return NULL; | |
538 | } | |
cad40a5f KS |
539 | case '+': |
540 | util_strscpy(subsys, sizeof(subsys), &id[1]); | |
541 | sysname = strchr(subsys, ':'); | |
542 | if (sysname == NULL) | |
543 | return NULL; | |
544 | sysname[0] = '\0'; | |
545 | sysname = &sysname[1]; | |
546 | return udev_device_new_from_subsystem_sysname(udev, subsys, sysname); | |
547 | default: | |
548 | return NULL; | |
549 | } | |
550 | } | |
551 | ||
1e511322 KS |
552 | /** |
553 | * udev_device_new_from_subsystem_sysname: | |
554 | * @udev: udev library context | |
214a6c79 | 555 | * @subsystem: the subsystem of the device |
1e511322 KS |
556 | * @sysname: the name of the device |
557 | * | |
dbba7e40 KS |
558 | * Create new udev device, and fill in information from the sys device |
559 | * and the udev database entry. The device is looked up by the subsystem | |
560 | * and name string of the device, like "mem" / "zero", or "block" / "sda". | |
1e511322 KS |
561 | * |
562 | * The initial refcount is 1, and needs to be decremented to | |
563 | * release the resources of the udev device. | |
564 | * | |
565 | * Returns: a new udev device, or #NULL, if it does not exist | |
566 | **/ | |
90d80c2e KS |
567 | struct udev_device *udev_device_new_from_subsystem_sysname(struct udev *udev, const char *subsystem, const char *sysname) |
568 | { | |
90d80c2e KS |
569 | char path_full[UTIL_PATH_SIZE]; |
570 | char *path; | |
065db052 | 571 | size_t l; |
90d80c2e KS |
572 | struct stat statbuf; |
573 | ||
065db052 KS |
574 | path = path_full; |
575 | l = util_strpcpyl(&path, sizeof(path_full), udev_get_sys_path(udev), NULL); | |
90d80c2e KS |
576 | |
577 | if (strcmp(subsystem, "subsystem") == 0) { | |
065db052 | 578 | util_strscpyl(path, l, "/subsystem/", sysname, NULL); |
90d80c2e KS |
579 | if (stat(path_full, &statbuf) == 0) |
580 | goto found; | |
581 | ||
065db052 | 582 | util_strscpyl(path, l, "/bus/", sysname, NULL); |
90d80c2e KS |
583 | if (stat(path_full, &statbuf) == 0) |
584 | goto found; | |
585 | ||
065db052 | 586 | util_strscpyl(path, l, "/class/", sysname, NULL); |
90d80c2e KS |
587 | if (stat(path_full, &statbuf) == 0) |
588 | goto found; | |
589 | goto out; | |
590 | } | |
591 | ||
592 | if (strcmp(subsystem, "module") == 0) { | |
065db052 | 593 | util_strscpyl(path, l, "/module/", sysname, NULL); |
90d80c2e KS |
594 | if (stat(path_full, &statbuf) == 0) |
595 | goto found; | |
596 | goto out; | |
597 | } | |
598 | ||
599 | if (strcmp(subsystem, "drivers") == 0) { | |
600 | char subsys[UTIL_NAME_SIZE]; | |
601 | char *driver; | |
602 | ||
065db052 | 603 | util_strscpy(subsys, sizeof(subsys), sysname); |
90d80c2e KS |
604 | driver = strchr(subsys, ':'); |
605 | if (driver != NULL) { | |
606 | driver[0] = '\0'; | |
607 | driver = &driver[1]; | |
065db052 KS |
608 | |
609 | util_strscpyl(path, l, "/subsystem/", subsys, "/drivers/", driver, NULL); | |
90d80c2e KS |
610 | if (stat(path_full, &statbuf) == 0) |
611 | goto found; | |
612 | ||
065db052 | 613 | util_strscpyl(path, l, "/bus/", subsys, "/drivers/", driver, NULL); |
90d80c2e KS |
614 | if (stat(path_full, &statbuf) == 0) |
615 | goto found; | |
616 | } | |
617 | goto out; | |
618 | } | |
619 | ||
065db052 | 620 | util_strscpyl(path, l, "/subsystem/", subsystem, "/devices/", sysname, NULL); |
90d80c2e KS |
621 | if (stat(path_full, &statbuf) == 0) |
622 | goto found; | |
623 | ||
065db052 | 624 | util_strscpyl(path, l, "/bus/", subsystem, "/devices/", sysname, NULL); |
90d80c2e KS |
625 | if (stat(path_full, &statbuf) == 0) |
626 | goto found; | |
627 | ||
065db052 | 628 | util_strscpyl(path, l, "/class/", subsystem, "/", sysname, NULL); |
90d80c2e KS |
629 | if (stat(path_full, &statbuf) == 0) |
630 | goto found; | |
631 | out: | |
632 | return NULL; | |
633 | found: | |
634 | return udev_device_new_from_syspath(udev, path_full); | |
635 | } | |
636 | ||
fc8d61c5 KS |
637 | /** |
638 | * udev_device_new_from_environment | |
639 | * @udev: udev library context | |
640 | * | |
641 | * Create new udev device, and fill in information from the | |
642 | * current process environment. This only works reliable if | |
643 | * the process is called from a udev rule. It is usually used | |
644 | * for tools executed from IMPORT= rules. | |
645 | * | |
646 | * The initial refcount is 1, and needs to be decremented to | |
647 | * release the resources of the udev device. | |
648 | * | |
649 | * Returns: a new udev device, or #NULL, if it does not exist | |
650 | **/ | |
651 | struct udev_device *udev_device_new_from_environment(struct udev *udev) | |
652 | { | |
653 | int i; | |
654 | struct udev_device *udev_device; | |
655 | ||
656 | udev_device = udev_device_new(udev); | |
657 | if (udev_device == NULL) | |
658 | return NULL; | |
659 | udev_device_set_info_loaded(udev_device); | |
660 | ||
661 | for (i = 0; environ[i] != NULL; i++) | |
662 | udev_device_add_property_from_string_parse(udev_device, environ[i]); | |
663 | ||
664 | if (udev_device_add_property_from_string_parse_finish(udev_device) < 0) { | |
665 | info(udev, "missing values, invalid device\n"); | |
666 | udev_device_unref(udev_device); | |
667 | udev_device = NULL; | |
668 | } | |
669 | ||
670 | return udev_device; | |
671 | } | |
672 | ||
b2d9e4f2 | 673 | static struct udev_device *device_new_from_parent(struct udev_device *udev_device) |
4ad3a37f KS |
674 | { |
675 | struct udev_device *udev_device_parent = NULL; | |
676 | char path[UTIL_PATH_SIZE]; | |
b95f8a76 | 677 | const char *subdir; |
4ad3a37f | 678 | |
065db052 | 679 | util_strscpy(path, sizeof(path), udev_device->syspath); |
b95f8a76 | 680 | subdir = &path[strlen(udev_get_sys_path(udev_device->udev))+1]; |
3c189886 | 681 | for (;;) { |
b95f8a76 KS |
682 | char *pos; |
683 | ||
684 | pos = strrchr(subdir, '/'); | |
685 | if (pos == NULL || pos < &subdir[2]) | |
4ad3a37f KS |
686 | break; |
687 | pos[0] = '\0'; | |
8753fadf | 688 | udev_device_parent = udev_device_new_from_syspath(udev_device->udev, path); |
4ad3a37f | 689 | if (udev_device_parent != NULL) |
0518da3b KS |
690 | return udev_device_parent; |
691 | } | |
0518da3b | 692 | return NULL; |
4ad3a37f KS |
693 | } |
694 | ||
1e511322 KS |
695 | /** |
696 | * udev_device_get_parent: | |
697 | * @udev_device: the device to start searching from | |
698 | * | |
699 | * Find the next parent device, and fill in information from the sys | |
700 | * device and the udev database entry. | |
701 | * | |
702 | * The returned the device is not referenced. It is attached to the | |
703 | * child device, and will be cleaned up when the child device | |
704 | * is cleaned up. | |
705 | * | |
214a6c79 | 706 | * It is not necessarily just the upper level directory, empty or not |
1e511322 KS |
707 | * recognized sys directories are ignored. |
708 | * | |
709 | * It can be called as many times as needed, without caring about | |
710 | * references. | |
711 | * | |
712 | * Returns: a new udev device, or #NULL, if it no parent exist. | |
713 | **/ | |
b2d9e4f2 KS |
714 | struct udev_device *udev_device_get_parent(struct udev_device *udev_device) |
715 | { | |
b95f8a76 KS |
716 | if (udev_device == NULL) |
717 | return NULL; | |
31f4b036 | 718 | if (!udev_device->parent_set) { |
28460195 | 719 | udev_device->parent_set = true; |
31f4b036 | 720 | udev_device->parent_device = device_new_from_parent(udev_device); |
0518da3b | 721 | } |
31f4b036 | 722 | if (udev_device->parent_device != NULL) |
86b57788 | 723 | dbg(udev_device->udev, "returning existing parent %p\n", udev_device->parent_device); |
b2d9e4f2 KS |
724 | return udev_device->parent_device; |
725 | } | |
726 | ||
1e511322 KS |
727 | /** |
728 | * udev_device_get_parent_with_subsystem_devtype: | |
729 | * @udev_device: udev device to start searching from | |
214a6c79 | 730 | * @subsystem: the subsystem of the device |
1e511322 KS |
731 | * @devtype: the type (DEVTYPE) of the device |
732 | * | |
733 | * Find the next parent device, with a matching subsystem and devtype | |
734 | * value, and fill in information from the sys device and the udev | |
735 | * database entry. | |
736 | * | |
79ef2e97 | 737 | * If devtype is #NULL, only subsystem is checked, and any devtype will |
54d4f54e MP |
738 | * match. |
739 | * | |
1e511322 KS |
740 | * The returned the device is not referenced. It is attached to the |
741 | * child device, and will be cleaned up when the child device | |
742 | * is cleaned up. | |
743 | * | |
744 | * It can be called as many times as needed, without caring about | |
745 | * references. | |
746 | * | |
8d6bc73a | 747 | * Returns: a new udev device, or #NULL if no matching parent exists. |
1e511322 | 748 | **/ |
883012d4 | 749 | struct udev_device *udev_device_get_parent_with_subsystem_devtype(struct udev_device *udev_device, const char *subsystem, const char *devtype) |
bf8b2ae1 MH |
750 | { |
751 | struct udev_device *parent; | |
752 | ||
883012d4 MH |
753 | if (subsystem == NULL) |
754 | return NULL; | |
755 | ||
bf8b2ae1 MH |
756 | parent = udev_device_get_parent(udev_device); |
757 | while (parent != NULL) { | |
883012d4 | 758 | const char *parent_subsystem; |
bf8b2ae1 MH |
759 | const char *parent_devtype; |
760 | ||
883012d4 MH |
761 | parent_subsystem = udev_device_get_subsystem(parent); |
762 | if (parent_subsystem != NULL && strcmp(parent_subsystem, subsystem) == 0) { | |
763 | if (devtype == NULL) | |
764 | break; | |
765 | parent_devtype = udev_device_get_devtype(parent); | |
766 | if (parent_devtype != NULL && strcmp(parent_devtype, devtype) == 0) | |
767 | break; | |
768 | } | |
bf8b2ae1 MH |
769 | parent = udev_device_get_parent(parent); |
770 | } | |
771 | return parent; | |
772 | } | |
773 | ||
eb1f0e66 KS |
774 | /** |
775 | * udev_device_get_udev: | |
7d8787b3 | 776 | * @udev_device: udev device |
eb1f0e66 KS |
777 | * |
778 | * Retrieve the udev library context the device was created with. | |
779 | * | |
780 | * Returns: the udev library context | |
781 | **/ | |
782 | struct udev *udev_device_get_udev(struct udev_device *udev_device) | |
783 | { | |
ba6929f6 KS |
784 | if (udev_device == NULL) |
785 | return NULL; | |
eb1f0e66 KS |
786 | return udev_device->udev; |
787 | } | |
788 | ||
789 | /** | |
790 | * udev_device_ref: | |
791 | * @udev_device: udev device | |
792 | * | |
793 | * Take a reference of a udev device. | |
794 | * | |
795 | * Returns: the passed udev device | |
796 | **/ | |
797 | struct udev_device *udev_device_ref(struct udev_device *udev_device) | |
798 | { | |
ba6929f6 KS |
799 | if (udev_device == NULL) |
800 | return NULL; | |
eb1f0e66 KS |
801 | udev_device->refcount++; |
802 | return udev_device; | |
803 | } | |
804 | ||
805 | /** | |
806 | * udev_device_unref: | |
807 | * @udev_device: udev device | |
808 | * | |
809 | * Drop a reference of a udev device. If the refcount reaches zero, | |
be7de409 | 810 | * the resources of the device will be released. |
eb1f0e66 KS |
811 | * |
812 | **/ | |
813 | void udev_device_unref(struct udev_device *udev_device) | |
814 | { | |
ba6929f6 KS |
815 | if (udev_device == NULL) |
816 | return; | |
eb1f0e66 KS |
817 | udev_device->refcount--; |
818 | if (udev_device->refcount > 0) | |
819 | return; | |
b2d9e4f2 KS |
820 | if (udev_device->parent_device != NULL) |
821 | udev_device_unref(udev_device->parent_device); | |
11d543c1 | 822 | free(udev_device->syspath); |
517814e7 | 823 | free(udev_device->sysname); |
99214844 | 824 | free(udev_device->devnode); |
ba6929f6 | 825 | free(udev_device->subsystem); |
bf8b2ae1 | 826 | free(udev_device->devtype); |
eb8837e1 KS |
827 | udev_list_cleanup_entries(udev_device->udev, &udev_device->devlinks_list); |
828 | udev_list_cleanup_entries(udev_device->udev, &udev_device->properties_list); | |
20bee04c | 829 | udev_list_cleanup_entries(udev_device->udev, &udev_device->sysattr_value_list); |
28460195 KS |
830 | udev_list_cleanup_entries(udev_device->udev, &udev_device->sysattr_list); |
831 | udev_list_cleanup_entries(udev_device->udev, &udev_device->tags_list); | |
1c7047ea KS |
832 | free(udev_device->action); |
833 | free(udev_device->driver); | |
834 | free(udev_device->devpath_old); | |
2ffc9cc1 | 835 | free(udev_device->sysname_old); |
cb14f454 | 836 | free(udev_device->knodename); |
4281da1f | 837 | free(udev_device->id_filename); |
6493e655 | 838 | free(udev_device->envp); |
c2654402 | 839 | free(udev_device->monitor_buf); |
86b57788 | 840 | dbg(udev_device->udev, "udev_device: %p released\n", udev_device); |
eb1f0e66 KS |
841 | free(udev_device); |
842 | } | |
843 | ||
844 | /** | |
845 | * udev_device_get_devpath: | |
846 | * @udev_device: udev device | |
847 | * | |
11d543c1 KS |
848 | * Retrieve the kernel devpath value of the udev device. The path |
849 | * does not contain the sys mount point, and starts with a '/'. | |
eb1f0e66 | 850 | * |
11d543c1 | 851 | * Returns: the devpath of the udev device |
eb1f0e66 KS |
852 | **/ |
853 | const char *udev_device_get_devpath(struct udev_device *udev_device) | |
854 | { | |
ba6929f6 KS |
855 | if (udev_device == NULL) |
856 | return NULL; | |
857 | return udev_device->devpath; | |
eb1f0e66 KS |
858 | } |
859 | ||
11d543c1 KS |
860 | /** |
861 | * udev_device_get_syspath: | |
862 | * @udev_device: udev device | |
863 | * | |
864 | * Retrieve the sys path of the udev device. The path is an | |
865 | * absolute path and starts with the sys mount point. | |
866 | * | |
867 | * Returns: the sys path of the udev device | |
868 | **/ | |
869 | const char *udev_device_get_syspath(struct udev_device *udev_device) | |
870 | { | |
871 | if (udev_device == NULL) | |
872 | return NULL; | |
873 | return udev_device->syspath; | |
874 | } | |
875 | ||
1e511322 KS |
876 | /** |
877 | * udev_device_get_sysname: | |
878 | * @udev_device: udev device | |
879 | * | |
880 | * Returns: the sys name of the device device | |
881 | **/ | |
4ad3a37f KS |
882 | const char *udev_device_get_sysname(struct udev_device *udev_device) |
883 | { | |
884 | if (udev_device == NULL) | |
885 | return NULL; | |
886 | return udev_device->sysname; | |
887 | } | |
888 | ||
1e511322 KS |
889 | /** |
890 | * udev_device_get_sysnum: | |
891 | * @udev_device: udev device | |
892 | * | |
893 | * Returns: the trailing number of of the device name | |
894 | **/ | |
517814e7 KS |
895 | const char *udev_device_get_sysnum(struct udev_device *udev_device) |
896 | { | |
897 | if (udev_device == NULL) | |
898 | return NULL; | |
899 | return udev_device->sysnum; | |
900 | } | |
901 | ||
eb1f0e66 | 902 | /** |
fb762bb9 | 903 | * udev_device_get_devnode: |
eb1f0e66 KS |
904 | * @udev_device: udev device |
905 | * | |
906 | * Retrieve the device node file name belonging to the udev device. | |
ba6929f6 | 907 | * The path is an absolute path, and starts with the device directory. |
eb1f0e66 KS |
908 | * |
909 | * Returns: the device node file name of the udev device, or #NULL if no device node exists | |
910 | **/ | |
fb762bb9 | 911 | const char *udev_device_get_devnode(struct udev_device *udev_device) |
eb1f0e66 | 912 | { |
ba6929f6 | 913 | if (udev_device == NULL) |
eb1f0e66 | 914 | return NULL; |
cdb1d760 KS |
915 | if (!udev_device->info_loaded) { |
916 | udev_device_read_uevent_file(udev_device); | |
5f59fa09 | 917 | udev_device_read_db(udev_device, NULL); |
cdb1d760 KS |
918 | } |
919 | ||
920 | /* we might get called before we handled an event and have a db, use the kernel-provided name */ | |
921 | if (udev_device->devnode == NULL && udev_device_get_knodename(udev_device) != NULL) { | |
24d10766 KS |
922 | char filename[UTIL_NAME_SIZE]; |
923 | ||
924 | util_strscpyl(filename, sizeof(filename), udev_get_dev_path(udev_device->udev), "/", | |
925 | udev_device_get_knodename(udev_device), NULL); | |
926 | udev_device_set_devnode(udev_device, filename); | |
cdb1d760 KS |
927 | return udev_device->devnode; |
928 | } | |
929 | ||
99214844 | 930 | return udev_device->devnode; |
eb1f0e66 KS |
931 | } |
932 | ||
933 | /** | |
934 | * udev_device_get_subsystem: | |
935 | * @udev_device: udev device | |
936 | * | |
937 | * Retrieve the subsystem string of the udev device. The string does not | |
938 | * contain any "/". | |
939 | * | |
940 | * Returns: the subsystem name of the udev device, or #NULL if it can not be determined | |
941 | **/ | |
942 | const char *udev_device_get_subsystem(struct udev_device *udev_device) | |
943 | { | |
17fcfb59 | 944 | char subsystem[UTIL_NAME_SIZE]; |
ba6929f6 KS |
945 | |
946 | if (udev_device == NULL) | |
947 | return NULL; | |
5c5cad79 | 948 | if (!udev_device->subsystem_set) { |
28460195 | 949 | udev_device->subsystem_set = true; |
214a6c79 | 950 | /* read "subsystem" link */ |
5c5cad79 KS |
951 | if (util_get_sys_subsystem(udev_device->udev, udev_device->syspath, subsystem, sizeof(subsystem)) > 0) { |
952 | udev_device_set_subsystem(udev_device, subsystem); | |
953 | return udev_device->subsystem; | |
954 | } | |
955 | /* implicit names */ | |
956 | if (strncmp(udev_device->devpath, "/module/", 8) == 0) { | |
957 | udev_device_set_subsystem(udev_device, "module"); | |
958 | return udev_device->subsystem; | |
959 | } | |
960 | if (strstr(udev_device->devpath, "/drivers/") != NULL) { | |
961 | udev_device_set_subsystem(udev_device, "drivers"); | |
962 | return udev_device->subsystem; | |
963 | } | |
964 | if (strncmp(udev_device->devpath, "/subsystem/", 11) == 0 || | |
965 | strncmp(udev_device->devpath, "/class/", 7) == 0 || | |
966 | strncmp(udev_device->devpath, "/bus/", 5) == 0) { | |
967 | udev_device_set_subsystem(udev_device, "subsystem"); | |
968 | return udev_device->subsystem; | |
969 | } | |
0518da3b | 970 | } |
5c5cad79 | 971 | return udev_device->subsystem; |
eb1f0e66 KS |
972 | } |
973 | ||
bf8b2ae1 MH |
974 | /** |
975 | * udev_device_get_devtype: | |
976 | * @udev_device: udev device | |
977 | * | |
978 | * Retrieve the devtype string of the udev device. | |
979 | * | |
980 | * Returns: the devtype name of the udev device, or #NULL if it can not be determined | |
981 | **/ | |
982 | const char *udev_device_get_devtype(struct udev_device *udev_device) | |
983 | { | |
984 | if (udev_device == NULL) | |
985 | return NULL; | |
986 | if (!udev_device->devtype_set) { | |
28460195 KS |
987 | udev_device->devtype_set = true; |
988 | udev_device_read_uevent_file(udev_device); | |
bf8b2ae1 MH |
989 | } |
990 | return udev_device->devtype; | |
991 | } | |
992 | ||
eb1f0e66 | 993 | /** |
0de33a61 | 994 | * udev_device_get_devlinks_list_entry: |
eb1f0e66 | 995 | * @udev_device: udev device |
eb1f0e66 | 996 | * |
bf7ad0ea KS |
997 | * Retrieve the list of device links pointing to the device file of |
998 | * the udev device. The next list entry can be retrieved with | |
e345e267 | 999 | * udev_list_entry_next(), which returns #NULL if no more entries exist. |
bf7ad0ea | 1000 | * The devlink path can be retrieved from the list entry by |
e345e267 | 1001 | * udev_list_entry_get_name(). The path is an absolute path, and starts with |
bf7ad0ea | 1002 | * the device directory. |
eb1f0e66 | 1003 | * |
bf7ad0ea | 1004 | * Returns: the first entry of the device node link list |
eb1f0e66 | 1005 | **/ |
0de33a61 | 1006 | struct udev_list_entry *udev_device_get_devlinks_list_entry(struct udev_device *udev_device) |
eb1f0e66 | 1007 | { |
99214844 KS |
1008 | if (udev_device == NULL) |
1009 | return NULL; | |
1010 | if (!udev_device->info_loaded) | |
5f59fa09 | 1011 | udev_device_read_db(udev_device, NULL); |
517814e7 | 1012 | return udev_list_get_entry(&udev_device->devlinks_list); |
eb1f0e66 KS |
1013 | } |
1014 | ||
979ff016 KS |
1015 | void udev_device_cleanup_devlinks_list(struct udev_device *udev_device) |
1016 | { | |
28460195 | 1017 | udev_device->devlinks_uptodate = false; |
eb8837e1 | 1018 | udev_list_cleanup_entries(udev_device->udev, &udev_device->devlinks_list); |
979ff016 KS |
1019 | } |
1020 | ||
eb1f0e66 | 1021 | /** |
0de33a61 | 1022 | * udev_device_get_properties_list_entry: |
eb1f0e66 | 1023 | * @udev_device: udev device |
eb1f0e66 | 1024 | * |
bf7ad0ea | 1025 | * Retrieve the list of key/value device properties of the udev |
e345e267 | 1026 | * device. The next list entry can be retrieved with udev_list_entry_next(), |
bf7ad0ea KS |
1027 | * which returns #NULL if no more entries exist. The property name |
1028 | * can be retrieved from the list entry by udev_list_get_name(), | |
1029 | * the property value by udev_list_get_value(). | |
eb1f0e66 | 1030 | * |
bf7ad0ea | 1031 | * Returns: the first entry of the property list |
eb1f0e66 | 1032 | **/ |
0de33a61 | 1033 | struct udev_list_entry *udev_device_get_properties_list_entry(struct udev_device *udev_device) |
eb1f0e66 | 1034 | { |
99214844 KS |
1035 | if (udev_device == NULL) |
1036 | return NULL; | |
28460195 KS |
1037 | if (!udev_device->info_loaded) { |
1038 | udev_device_read_uevent_file(udev_device); | |
5f59fa09 | 1039 | udev_device_read_db(udev_device, NULL); |
28460195 | 1040 | } |
bd85566c KS |
1041 | if (!udev_device->devlinks_uptodate) { |
1042 | char symlinks[UTIL_PATH_SIZE]; | |
1043 | struct udev_list_entry *list_entry; | |
1044 | ||
28460195 | 1045 | udev_device->devlinks_uptodate = true; |
bd85566c KS |
1046 | list_entry = udev_device_get_devlinks_list_entry(udev_device); |
1047 | if (list_entry != NULL) { | |
065db052 KS |
1048 | char *s; |
1049 | size_t l; | |
1050 | ||
1051 | s = symlinks; | |
1052 | l = util_strpcpyl(&s, sizeof(symlinks), udev_list_entry_get_name(list_entry), NULL); | |
1053 | udev_list_entry_foreach(list_entry, udev_list_entry_get_next(list_entry)) | |
1054 | l = util_strpcpyl(&s, l, " ", udev_list_entry_get_name(list_entry), NULL); | |
bd85566c KS |
1055 | udev_device_add_property(udev_device, "DEVLINKS", symlinks); |
1056 | } | |
1057 | } | |
28460195 KS |
1058 | if (!udev_device->tags_uptodate) { |
1059 | udev_device->tags_uptodate = true; | |
1060 | if (udev_device_get_tags_list_entry(udev_device) != NULL) { | |
1061 | char tags[UTIL_PATH_SIZE]; | |
1062 | struct udev_list_entry *list_entry; | |
1063 | char *s; | |
1064 | size_t l; | |
1065 | ||
1066 | s = tags; | |
1067 | l = util_strpcpyl(&s, sizeof(tags), ":", NULL); | |
1068 | udev_list_entry_foreach(list_entry, udev_device_get_tags_list_entry(udev_device)) | |
1069 | l = util_strpcpyl(&s, l, udev_list_entry_get_name(list_entry), ":", NULL); | |
1070 | udev_device_add_property(udev_device, "TAGS", tags); | |
1071 | } | |
1072 | } | |
8cd2e972 | 1073 | return udev_list_get_entry(&udev_device->properties_list); |
eb1f0e66 | 1074 | } |
11d543c1 | 1075 | |
1e511322 KS |
1076 | /** |
1077 | * udev_device_get_driver: | |
1078 | * @udev_device: udev device | |
1079 | * | |
ce1d6d7f | 1080 | * Returns: the driver string, or #NULL if there is no driver attached. |
1e511322 | 1081 | **/ |
c4f5f942 KS |
1082 | const char *udev_device_get_driver(struct udev_device *udev_device) |
1083 | { | |
17fcfb59 | 1084 | char driver[UTIL_NAME_SIZE]; |
95d90c4f | 1085 | |
c4f5f942 KS |
1086 | if (udev_device == NULL) |
1087 | return NULL; | |
5c5cad79 | 1088 | if (!udev_device->driver_set) { |
28460195 | 1089 | udev_device->driver_set = true; |
5c5cad79 KS |
1090 | if (util_get_sys_driver(udev_device->udev, udev_device->syspath, driver, sizeof(driver)) > 0) |
1091 | udev_device->driver = strdup(driver); | |
1092 | } | |
c4f5f942 KS |
1093 | return udev_device->driver; |
1094 | } | |
1095 | ||
1e511322 KS |
1096 | /** |
1097 | * udev_device_get_devnum: | |
1098 | * @udev_device: udev device | |
1099 | * | |
1100 | * Returns: the device major/minor number. | |
1101 | **/ | |
c4f5f942 KS |
1102 | dev_t udev_device_get_devnum(struct udev_device *udev_device) |
1103 | { | |
1104 | if (udev_device == NULL) | |
1105 | return makedev(0, 0); | |
99214844 | 1106 | if (!udev_device->info_loaded) |
28460195 | 1107 | udev_device_read_uevent_file(udev_device); |
c4f5f942 KS |
1108 | return udev_device->devnum; |
1109 | } | |
1110 | ||
1e511322 KS |
1111 | /** |
1112 | * udev_device_get_action: | |
1113 | * @udev_device: udev device | |
1114 | * | |
1115 | * This is only valid if the device was received through a monitor. Devices read from | |
1116 | * sys do not have an action string. Usual actions are: add, remove, change, online, | |
1117 | * offline. | |
1118 | * | |
1119 | * Returns: the kernel action value, or #NULL if there is no action value available. | |
1120 | **/ | |
c4f5f942 KS |
1121 | const char *udev_device_get_action(struct udev_device *udev_device) |
1122 | { | |
1123 | if (udev_device == NULL) | |
1124 | return NULL; | |
1125 | return udev_device->action; | |
1126 | } | |
1127 | ||
1e511322 KS |
1128 | /** |
1129 | * udev_device_get_devnum: | |
1130 | * @udev_device: udev device | |
1131 | * | |
1132 | * This is only valid if the device was received through a monitor. Devices read from | |
1133 | * sys do not have a sequence number. | |
1134 | * | |
1135 | * Returns: the kernel event sequence number, or 0 if there is no sequence number available. | |
1136 | **/ | |
37372bbc KS |
1137 | unsigned long long int udev_device_get_seqnum(struct udev_device *udev_device) |
1138 | { | |
1139 | if (udev_device == NULL) | |
1140 | return 0; | |
1141 | return udev_device->seqnum; | |
1142 | } | |
1143 | ||
9c6a11b1 KS |
1144 | /** |
1145 | * udev_device_get_usec_since_initialized: | |
1146 | * @udev_device: udev device | |
1147 | * | |
1148 | * Return the number of microseconds passed since udev set up the | |
1149 | * device for the first time. | |
1150 | * | |
1151 | * This is only implemented for devices with need to store properties | |
1152 | * in the udev database. All other devices return 0 here. | |
1153 | * | |
1154 | * Returns: the number of microseconds since the device was first seen. | |
1155 | **/ | |
1156 | unsigned long long int udev_device_get_usec_since_initialized(struct udev_device *udev_device) | |
1157 | { | |
1158 | unsigned long long now; | |
1159 | ||
1160 | if (udev_device == NULL) | |
1161 | return 0; | |
1162 | if (!udev_device->info_loaded) | |
5f59fa09 | 1163 | udev_device_read_db(udev_device, NULL); |
9c6a11b1 KS |
1164 | if (udev_device->usec_initialized == 0) |
1165 | return 0; | |
1166 | now = usec_monotonic(); | |
1167 | if (now == 0) | |
1168 | return 0; | |
1169 | return now - udev_device->usec_initialized; | |
1170 | } | |
1171 | ||
1172 | unsigned long long udev_device_get_usec_initialized(struct udev_device *udev_device) | |
1173 | { | |
1174 | return udev_device->usec_initialized; | |
1175 | } | |
1176 | ||
1177 | void udev_device_set_usec_initialized(struct udev_device *udev_device, unsigned long long usec_initialized) | |
1178 | { | |
1179 | udev_device->usec_initialized = usec_initialized; | |
1180 | } | |
1181 | ||
1e511322 KS |
1182 | /** |
1183 | * udev_device_get_sysattr_value: | |
1184 | * @udev_device: udev device | |
1185 | * @sysattr: attribute name | |
1186 | * | |
456719b6 | 1187 | * The retrieved value is cached in the device. Repeated calls will return the same |
1e511322 KS |
1188 | * value and not open the attribute again. |
1189 | * | |
1190 | * Returns: the content of a sys attribute file, or #NULL if there is no sys attribute value. | |
1191 | **/ | |
69239210 | 1192 | const char *udev_device_get_sysattr_value(struct udev_device *udev_device, const char *sysattr) |
93b0f384 | 1193 | { |
0de33a61 | 1194 | struct udev_list_entry *list_entry; |
93b0f384 | 1195 | char path[UTIL_PATH_SIZE]; |
affed87a | 1196 | char value[4096]; |
93b0f384 KS |
1197 | struct stat statbuf; |
1198 | int fd; | |
1199 | ssize_t size; | |
1200 | const char *val = NULL; | |
1201 | ||
517814e7 KS |
1202 | if (udev_device == NULL) |
1203 | return NULL; | |
69239210 | 1204 | if (sysattr == NULL) |
517814e7 KS |
1205 | return NULL; |
1206 | ||
0518da3b | 1207 | /* look for possibly already cached result */ |
20bee04c | 1208 | udev_list_entry_foreach(list_entry, udev_list_get_entry(&udev_device->sysattr_value_list)) { |
69239210 | 1209 | if (strcmp(udev_list_entry_get_name(list_entry), sysattr) == 0) { |
86b57788 KS |
1210 | dbg(udev_device->udev, "got '%s' (%s) from cache\n", |
1211 | sysattr, udev_list_entry_get_value(list_entry)); | |
0de33a61 | 1212 | return udev_list_entry_get_value(list_entry); |
0518da3b KS |
1213 | } |
1214 | } | |
1215 | ||
065db052 | 1216 | util_strscpyl(path, sizeof(path), udev_device_get_syspath(udev_device), "/", sysattr, NULL); |
93b0f384 | 1217 | if (lstat(path, &statbuf) != 0) { |
86b57788 | 1218 | dbg(udev_device->udev, "no attribute '%s', keep negative entry\n", path); |
20bee04c | 1219 | udev_list_entry_add(udev_device->udev, &udev_device->sysattr_value_list, sysattr, NULL, 0, 0); |
93b0f384 KS |
1220 | goto out; |
1221 | } | |
1222 | ||
1223 | if (S_ISLNK(statbuf.st_mode)) { | |
93b0f384 KS |
1224 | char target[UTIL_NAME_SIZE]; |
1225 | int len; | |
1226 | char *pos; | |
1227 | ||
096e59ed KS |
1228 | /* some core links return the last element of the target path */ |
1229 | if (strcmp(sysattr, "driver") != 0 && | |
1230 | strcmp(sysattr, "subsystem") != 0 && | |
1231 | strcmp(sysattr, "module") != 0) | |
1232 | goto out; | |
1233 | ||
93b0f384 | 1234 | len = readlink(path, target, sizeof(target)); |
60067cc7 KS |
1235 | if (len <= 0 || len == sizeof(target)) |
1236 | goto out; | |
1237 | target[len] = '\0'; | |
1238 | ||
1239 | pos = strrchr(target, '/'); | |
1240 | if (pos != NULL) { | |
1241 | pos = &pos[1]; | |
1242 | dbg(udev_device->udev, "cache '%s' with link value '%s'\n", sysattr, pos); | |
20bee04c | 1243 | list_entry = udev_list_entry_add(udev_device->udev, &udev_device->sysattr_value_list, sysattr, pos, 0, 0); |
60067cc7 | 1244 | val = udev_list_entry_get_value(list_entry); |
93b0f384 | 1245 | } |
60067cc7 | 1246 | |
93b0f384 KS |
1247 | goto out; |
1248 | } | |
1249 | ||
1250 | /* skip directories */ | |
1251 | if (S_ISDIR(statbuf.st_mode)) | |
1252 | goto out; | |
1253 | ||
1254 | /* skip non-readable files */ | |
1255 | if ((statbuf.st_mode & S_IRUSR) == 0) | |
1256 | goto out; | |
1257 | ||
1258 | /* read attribute value */ | |
0c5c4804 | 1259 | fd = open(path, O_RDONLY|O_CLOEXEC); |
93b0f384 | 1260 | if (fd < 0) { |
86b57788 | 1261 | dbg(udev_device->udev, "attribute '%s' can not be opened\n", path); |
93b0f384 KS |
1262 | goto out; |
1263 | } | |
1264 | size = read(fd, value, sizeof(value)); | |
1265 | close(fd); | |
1266 | if (size < 0) | |
1267 | goto out; | |
1268 | if (size == sizeof(value)) | |
1269 | goto out; | |
1270 | ||
0518da3b | 1271 | /* got a valid value, store it in cache and return it */ |
93b0f384 KS |
1272 | value[size] = '\0'; |
1273 | util_remove_trailing_chars(value, '\n'); | |
86b57788 | 1274 | dbg(udev_device->udev, "'%s' has attribute value '%s'\n", path, value); |
20bee04c | 1275 | list_entry = udev_list_entry_add(udev_device->udev, &udev_device->sysattr_value_list, sysattr, value, 0, 0); |
0de33a61 | 1276 | val = udev_list_entry_get_value(list_entry); |
93b0f384 KS |
1277 | out: |
1278 | return val; | |
1279 | } | |
517814e7 | 1280 | |
20bee04c | 1281 | static int udev_device_sysattr_list_read(struct udev_device *udev_device) |
f180ad25 | 1282 | { |
20bee04c | 1283 | struct dirent *dent; |
f180ad25 TE |
1284 | DIR *dir; |
1285 | int num = 0; | |
1286 | ||
1287 | if (udev_device == NULL) | |
1288 | return -1; | |
20bee04c | 1289 | if (udev_device->sysattr_list_read) |
f180ad25 TE |
1290 | return 0; |
1291 | ||
1292 | dir = opendir(udev_device_get_syspath(udev_device)); | |
1293 | if (!dir) { | |
1294 | dbg(udev_device->udev, "sysfs dir '%s' can not be opened\n", | |
1295 | udev_device_get_syspath(udev_device)); | |
1296 | return -1; | |
1297 | } | |
1298 | ||
20bee04c | 1299 | for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) { |
f180ad25 TE |
1300 | char path[UTIL_PATH_SIZE]; |
1301 | struct stat statbuf; | |
1302 | ||
1303 | /* only handle symlinks and regular files */ | |
20bee04c | 1304 | if (dent->d_type != DT_LNK && dent->d_type != DT_REG) |
f180ad25 TE |
1305 | continue; |
1306 | ||
20bee04c KS |
1307 | util_strscpyl(path, sizeof(path), udev_device_get_syspath(udev_device), "/", dent->d_name, NULL); |
1308 | if (lstat(path, &statbuf) != 0) | |
f180ad25 | 1309 | continue; |
20bee04c | 1310 | if ((statbuf.st_mode & S_IRUSR) == 0) |
f180ad25 TE |
1311 | continue; |
1312 | ||
20bee04c KS |
1313 | udev_list_entry_add(udev_device->udev, &udev_device->sysattr_list, |
1314 | dent->d_name, NULL, 0, 0); | |
1315 | num++; | |
f180ad25 TE |
1316 | } |
1317 | ||
20bee04c KS |
1318 | closedir(dir); |
1319 | dbg(udev_device->udev, "found %d sysattrs for '%s'\n", num, udev_device_get_syspath(udev_device)); | |
1320 | udev_device->sysattr_list_read = true; | |
f180ad25 TE |
1321 | |
1322 | return num; | |
1323 | } | |
1324 | ||
1325 | /** | |
1326 | * udev_device_get_sysattr_list_entry: | |
1327 | * @udev_device: udev device | |
1328 | * | |
1329 | * Retrieve the list of available sysattrs, with value being empty; | |
20bee04c KS |
1330 | * This just return all available sysfs attributes for a particular |
1331 | * device without reading their values. | |
f180ad25 TE |
1332 | * |
1333 | * Returns: the first entry of the property list | |
1334 | **/ | |
1335 | struct udev_list_entry *udev_device_get_sysattr_list_entry(struct udev_device *udev_device) | |
1336 | { | |
20bee04c | 1337 | if (!udev_device->sysattr_list_read) { |
f180ad25 | 1338 | int ret; |
20bee04c | 1339 | ret = udev_device_sysattr_list_read(udev_device); |
f180ad25 TE |
1340 | if (0 > ret) |
1341 | return NULL; | |
1342 | } | |
1343 | ||
20bee04c | 1344 | return udev_list_get_entry(&udev_device->sysattr_list); |
f180ad25 TE |
1345 | } |
1346 | ||
8cd2e972 | 1347 | int udev_device_set_syspath(struct udev_device *udev_device, const char *syspath) |
11d543c1 | 1348 | { |
8753fadf | 1349 | const char *pos; |
517814e7 | 1350 | size_t len; |
8753fadf | 1351 | |
8cd2e972 | 1352 | free(udev_device->syspath); |
8753fadf KS |
1353 | udev_device->syspath = strdup(syspath); |
1354 | if (udev_device->syspath == NULL) | |
11d543c1 KS |
1355 | return -ENOMEM; |
1356 | udev_device->devpath = &udev_device->syspath[strlen(udev_get_sys_path(udev_device->udev))]; | |
9a997ecf | 1357 | udev_device_add_property(udev_device, "DEVPATH", udev_device->devpath); |
517814e7 | 1358 | |
8753fadf KS |
1359 | pos = strrchr(udev_device->syspath, '/'); |
1360 | if (pos == NULL) | |
1361 | return -EINVAL; | |
517814e7 KS |
1362 | udev_device->sysname = strdup(&pos[1]); |
1363 | if (udev_device->sysname == NULL) | |
1364 | return -ENOMEM; | |
1365 | ||
1366 | /* some devices have '!' in their name, change that to '/' */ | |
1367 | len = 0; | |
1368 | while (udev_device->sysname[len] != '\0') { | |
1369 | if (udev_device->sysname[len] == '!') | |
1370 | udev_device->sysname[len] = '/'; | |
1371 | len++; | |
1372 | } | |
1373 | ||
1374 | /* trailing number */ | |
babcf3cb | 1375 | while (len > 0 && isdigit(udev_device->sysname[--len])) |
517814e7 | 1376 | udev_device->sysnum = &udev_device->sysname[len]; |
babcf3cb AJ |
1377 | |
1378 | /* sysname is completely numeric */ | |
1379 | if (len == 0) | |
1380 | udev_device->sysnum = NULL; | |
1381 | ||
11d543c1 KS |
1382 | return 0; |
1383 | } | |
1384 | ||
8cd2e972 | 1385 | int udev_device_set_subsystem(struct udev_device *udev_device, const char *subsystem) |
11d543c1 | 1386 | { |
979ff016 | 1387 | free(udev_device->subsystem); |
11d543c1 KS |
1388 | udev_device->subsystem = strdup(subsystem); |
1389 | if (udev_device->subsystem == NULL) | |
9a997ecf | 1390 | return -ENOMEM; |
28460195 | 1391 | udev_device->subsystem_set = true; |
9a997ecf | 1392 | udev_device_add_property(udev_device, "SUBSYSTEM", udev_device->subsystem); |
11d543c1 KS |
1393 | return 0; |
1394 | } | |
1395 | ||
bf8b2ae1 MH |
1396 | int udev_device_set_devtype(struct udev_device *udev_device, const char *devtype) |
1397 | { | |
1398 | free(udev_device->devtype); | |
1399 | udev_device->devtype = strdup(devtype); | |
1400 | if (udev_device->devtype == NULL) | |
1401 | return -ENOMEM; | |
28460195 | 1402 | udev_device->devtype_set = true; |
bf8b2ae1 MH |
1403 | udev_device_add_property(udev_device, "DEVTYPE", udev_device->devtype); |
1404 | return 0; | |
1405 | } | |
1406 | ||
8cd2e972 | 1407 | int udev_device_set_devnode(struct udev_device *udev_device, const char *devnode) |
11d543c1 | 1408 | { |
517814e7 | 1409 | free(udev_device->devnode); |
99214844 KS |
1410 | udev_device->devnode = strdup(devnode); |
1411 | if (udev_device->devnode == NULL) | |
11d543c1 | 1412 | return -ENOMEM; |
979ff016 | 1413 | udev_device_add_property(udev_device, "DEVNAME", udev_device->devnode); |
11d543c1 KS |
1414 | return 0; |
1415 | } | |
1416 | ||
6c29f2b9 | 1417 | int udev_device_add_devlink(struct udev_device *udev_device, const char *devlink, int unique) |
11d543c1 | 1418 | { |
6c29f2b9 KS |
1419 | struct udev_list_entry *list_entry; |
1420 | ||
28460195 | 1421 | udev_device->devlinks_uptodate = false; |
6c29f2b9 KS |
1422 | list_entry = udev_list_entry_add(udev_device->udev, &udev_device->devlinks_list, devlink, NULL, 1, 0); |
1423 | if (list_entry == NULL) | |
11d543c1 | 1424 | return -ENOMEM; |
6c29f2b9 | 1425 | if (unique) |
fbb31cd6 | 1426 | udev_list_entry_set_flags(list_entry, 1); |
11d543c1 KS |
1427 | return 0; |
1428 | } | |
1429 | ||
4281da1f KS |
1430 | const char *udev_device_get_id_filename(struct udev_device *udev_device) |
1431 | { | |
1432 | if (udev_device->id_filename == NULL) { | |
1433 | if (udev_device_get_subsystem(udev_device) == NULL) | |
1434 | return NULL; | |
1435 | ||
1436 | if (major(udev_device_get_devnum(udev_device)) > 0) { | |
1437 | /* use dev_t -- b259:131072, c254:0 */ | |
1438 | if (asprintf(&udev_device->id_filename, "%c%u:%u", | |
1439 | strcmp(udev_device_get_subsystem(udev_device), "block") == 0 ? 'b' : 'c', | |
1440 | major(udev_device_get_devnum(udev_device)), | |
1441 | minor(udev_device_get_devnum(udev_device))) < 0) | |
1442 | udev_device->id_filename = NULL; | |
ff0e1f4e | 1443 | } else if (udev_device_get_ifindex(udev_device) > 0) { |
4281da1f KS |
1444 | /* use netdev ifindex -- n3 */ |
1445 | if (asprintf(&udev_device->id_filename, "n%u", udev_device_get_ifindex(udev_device)) < 0) | |
1446 | udev_device->id_filename = NULL; | |
1447 | } else { | |
1448 | /* | |
1449 | * use $subsys:$syname -- pci:0000:00:1f.2 | |
1450 | * sysname() has '!' translated, get it from devpath | |
1451 | */ | |
1452 | const char *sysname; | |
1453 | sysname = strrchr(udev_device->devpath, '/'); | |
1454 | if (sysname == NULL) | |
1455 | return NULL; | |
1456 | sysname = &sysname[1]; | |
1457 | if (asprintf(&udev_device->id_filename, "+%s:%s", udev_device_get_subsystem(udev_device), sysname) < 0) | |
1458 | udev_device->id_filename = NULL; | |
1459 | } | |
1460 | } | |
1461 | return udev_device->id_filename; | |
1462 | } | |
1463 | ||
48a0170b KS |
1464 | /** |
1465 | * udev_device_get_is_initialized: | |
1466 | * @udev_device: udev device | |
1467 | * | |
1468 | * Check if udev has already handled the device and has set up | |
1469 | * device node permissions and context, or has renamed a network | |
1470 | * device. | |
1471 | * | |
9c6a11b1 | 1472 | * This is only implemented for devices with a device node |
48a0170b KS |
1473 | * or network interfaces. All other devices return 1 here. |
1474 | * | |
1475 | * Returns: 1 if the device is set up. 0 otherwise. | |
1476 | **/ | |
1477 | int udev_device_get_is_initialized(struct udev_device *udev_device) | |
1478 | { | |
1479 | if (!udev_device->info_loaded) | |
5f59fa09 | 1480 | udev_device_read_db(udev_device, NULL); |
48a0170b KS |
1481 | return udev_device->is_initialized; |
1482 | } | |
1483 | ||
1484 | void udev_device_set_is_initialized(struct udev_device *udev_device) | |
1485 | { | |
1486 | udev_device->is_initialized = true; | |
1487 | } | |
1488 | ||
28460195 KS |
1489 | int udev_device_add_tag(struct udev_device *udev_device, const char *tag) |
1490 | { | |
1491 | if (strchr(tag, ':') != NULL || strchr(tag, ' ') != NULL) | |
1492 | return -EINVAL; | |
1493 | udev_device->tags_uptodate = false; | |
1494 | if (udev_list_entry_add(udev_device->udev, &udev_device->tags_list, tag, NULL, 1, 0) != NULL) | |
1495 | return 0; | |
1496 | return -ENOMEM; | |
1497 | } | |
1498 | ||
1499 | void udev_device_cleanup_tags_list(struct udev_device *udev_device) | |
1500 | { | |
1501 | udev_device->tags_uptodate = false; | |
1502 | udev_list_cleanup_entries(udev_device->udev, &udev_device->tags_list); | |
1503 | } | |
1504 | ||
f712894d KS |
1505 | /** |
1506 | * udev_device_get_tags_list_entry: | |
1507 | * @udev_device: udev device | |
1508 | * | |
1509 | * Retrieve the list of tags attached to the udev device. The next | |
1510 | * list entry can be retrieved with udev_list_entry_next(), | |
1511 | * which returns #NULL if no more entries exist. The tag string | |
1512 | * can be retrieved from the list entry by udev_list_get_name(). | |
1513 | * | |
1514 | * Returns: the first entry of the tag list | |
1515 | **/ | |
28460195 KS |
1516 | struct udev_list_entry *udev_device_get_tags_list_entry(struct udev_device *udev_device) |
1517 | { | |
65f099c7 KS |
1518 | if (udev_device == NULL) |
1519 | return NULL; | |
28460195 KS |
1520 | return udev_list_get_entry(&udev_device->tags_list); |
1521 | } | |
1522 | ||
1523 | int udev_device_has_tag(struct udev_device *udev_device, const char *tag) | |
1524 | { | |
1525 | struct udev_list_entry *list_entry; | |
1526 | ||
1527 | if (!udev_device->info_loaded) | |
5f59fa09 | 1528 | udev_device_read_db(udev_device, NULL); |
28460195 KS |
1529 | list_entry = udev_device_get_tags_list_entry(udev_device); |
1530 | list_entry = udev_list_entry_get_by_name(list_entry, tag); | |
1531 | if (list_entry != NULL) | |
1532 | return 1; | |
1533 | return 0; | |
1534 | } | |
1535 | ||
6493e655 KS |
1536 | #define ENVP_SIZE 128 |
1537 | #define MONITOR_BUF_SIZE 4096 | |
1538 | static int update_envp_monitor_buf(struct udev_device *udev_device) | |
979ff016 | 1539 | { |
6493e655 | 1540 | struct udev_list_entry *list_entry; |
065db052 KS |
1541 | char *s; |
1542 | size_t l; | |
6493e655 | 1543 | unsigned int i; |
979ff016 | 1544 | |
6493e655 KS |
1545 | /* monitor buffer of property strings */ |
1546 | free(udev_device->monitor_buf); | |
1547 | udev_device->monitor_buf_len = 0; | |
1548 | udev_device->monitor_buf = malloc(MONITOR_BUF_SIZE); | |
1549 | if (udev_device->monitor_buf == NULL) | |
1550 | return -ENOMEM; | |
be18918f | 1551 | |
6493e655 | 1552 | /* envp array, strings will point into monitor buffer */ |
427e20b2 KS |
1553 | if (udev_device->envp == NULL) |
1554 | udev_device->envp = malloc(sizeof(char *) * ENVP_SIZE); | |
6493e655 KS |
1555 | if (udev_device->envp == NULL) |
1556 | return -ENOMEM; | |
979ff016 | 1557 | |
6493e655 | 1558 | i = 0; |
065db052 KS |
1559 | s = udev_device->monitor_buf; |
1560 | l = MONITOR_BUF_SIZE; | |
6493e655 | 1561 | udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(udev_device)) { |
b25a9454 KS |
1562 | const char *key; |
1563 | ||
1564 | key = udev_list_entry_get_name(list_entry); | |
1565 | /* skip private variables */ | |
1566 | if (key[0] == '.') | |
1567 | continue; | |
1568 | ||
6493e655 | 1569 | /* add string to envp array */ |
065db052 | 1570 | udev_device->envp[i++] = s; |
6493e655 KS |
1571 | if (i+1 >= ENVP_SIZE) |
1572 | return -EINVAL; | |
c2654402 | 1573 | |
6493e655 | 1574 | /* add property string to monitor buffer */ |
b25a9454 | 1575 | l = util_strpcpyl(&s, l, key, "=", udev_list_entry_get_value(list_entry), NULL); |
065db052 | 1576 | if (l == 0) |
c2654402 | 1577 | return -EINVAL; |
ecd42de2 | 1578 | /* advance past the trailing '\0' that util_strpcpyl() guarantees */ |
065db052 | 1579 | s++; |
ecd42de2 | 1580 | l--; |
c2654402 | 1581 | } |
6493e655 | 1582 | udev_device->envp[i] = NULL; |
065db052 | 1583 | udev_device->monitor_buf_len = s - udev_device->monitor_buf; |
28460195 | 1584 | udev_device->envp_uptodate = true; |
065db052 KS |
1585 | dbg(udev_device->udev, "filled envp/monitor buffer, %u properties, %zu bytes\n", |
1586 | i, udev_device->monitor_buf_len); | |
6493e655 KS |
1587 | return 0; |
1588 | } | |
1589 | ||
1590 | char **udev_device_get_properties_envp(struct udev_device *udev_device) | |
1591 | { | |
1592 | if (!udev_device->envp_uptodate) | |
c6243a41 | 1593 | if (update_envp_monitor_buf(udev_device) != 0) |
6493e655 KS |
1594 | return NULL; |
1595 | return udev_device->envp; | |
1596 | } | |
1597 | ||
1598 | ssize_t udev_device_get_properties_monitor_buf(struct udev_device *udev_device, const char **buf) | |
1599 | { | |
1600 | if (!udev_device->envp_uptodate) | |
c6243a41 | 1601 | if (update_envp_monitor_buf(udev_device) != 0) |
6493e655 | 1602 | return -EINVAL; |
c2654402 | 1603 | *buf = udev_device->monitor_buf; |
c2654402 KS |
1604 | return udev_device->monitor_buf_len; |
1605 | } | |
1606 | ||
8cd2e972 | 1607 | int udev_device_set_action(struct udev_device *udev_device, const char *action) |
c4f5f942 | 1608 | { |
517814e7 | 1609 | free(udev_device->action); |
c4f5f942 KS |
1610 | udev_device->action = strdup(action); |
1611 | if (udev_device->action == NULL) | |
1612 | return -ENOMEM; | |
31f4b036 | 1613 | udev_device_add_property(udev_device, "ACTION", udev_device->action); |
c4f5f942 KS |
1614 | return 0; |
1615 | } | |
1616 | ||
8cd2e972 | 1617 | int udev_device_set_driver(struct udev_device *udev_device, const char *driver) |
c4f5f942 | 1618 | { |
979ff016 | 1619 | free(udev_device->driver); |
c4f5f942 KS |
1620 | udev_device->driver = strdup(driver); |
1621 | if (udev_device->driver == NULL) | |
1622 | return -ENOMEM; | |
28460195 | 1623 | udev_device->driver_set = true; |
31f4b036 | 1624 | udev_device_add_property(udev_device, "DRIVER", udev_device->driver); |
c4f5f942 KS |
1625 | return 0; |
1626 | } | |
1627 | ||
8cd2e972 | 1628 | const char *udev_device_get_devpath_old(struct udev_device *udev_device) |
c4f5f942 | 1629 | { |
c4f5f942 KS |
1630 | return udev_device->devpath_old; |
1631 | } | |
1632 | ||
8cd2e972 | 1633 | int udev_device_set_devpath_old(struct udev_device *udev_device, const char *devpath_old) |
c4f5f942 | 1634 | { |
2ffc9cc1 KS |
1635 | const char *pos; |
1636 | size_t len; | |
1637 | ||
a71369b0 | 1638 | free(udev_device->devpath_old); |
c4f5f942 KS |
1639 | udev_device->devpath_old = strdup(devpath_old); |
1640 | if (udev_device->devpath_old == NULL) | |
1641 | return -ENOMEM; | |
31f4b036 | 1642 | udev_device_add_property(udev_device, "DEVPATH_OLD", udev_device->devpath_old); |
2ffc9cc1 KS |
1643 | |
1644 | pos = strrchr(udev_device->devpath_old, '/'); | |
1645 | if (pos == NULL) | |
1646 | return -EINVAL; | |
1647 | udev_device->sysname_old = strdup(&pos[1]); | |
1648 | if (udev_device->sysname_old == NULL) | |
1649 | return -ENOMEM; | |
1650 | ||
1651 | /* some devices have '!' in their name, change that to '/' */ | |
1652 | len = 0; | |
1653 | while (udev_device->sysname_old[len] != '\0') { | |
1654 | if (udev_device->sysname_old[len] == '!') | |
1655 | udev_device->sysname_old[len] = '/'; | |
1656 | len++; | |
1657 | } | |
c4f5f942 KS |
1658 | return 0; |
1659 | } | |
1660 | ||
2ffc9cc1 KS |
1661 | const char *udev_device_get_sysname_old(struct udev_device *udev_device) |
1662 | { | |
1663 | if (udev_device == NULL) | |
1664 | return NULL; | |
1665 | return udev_device->sysname_old; | |
1666 | } | |
1667 | ||
cb14f454 KS |
1668 | const char *udev_device_get_knodename(struct udev_device *udev_device) |
1669 | { | |
1670 | return udev_device->knodename; | |
1671 | } | |
1672 | ||
1673 | int udev_device_set_knodename(struct udev_device *udev_device, const char *knodename) | |
1674 | { | |
a71369b0 | 1675 | free(udev_device->knodename); |
cb14f454 KS |
1676 | udev_device->knodename = strdup(knodename); |
1677 | if (udev_device->knodename == NULL) | |
1678 | return -ENOMEM; | |
24d10766 KS |
1679 | /* do not overwrite the udev property with the kernel property */ |
1680 | if (udev_device->devnode == NULL) | |
1681 | udev_device_add_property(udev_device, "DEVNAME", udev_device->knodename); | |
cb14f454 KS |
1682 | return 0; |
1683 | } | |
1684 | ||
8cd2e972 | 1685 | int udev_device_get_timeout(struct udev_device *udev_device) |
c4f5f942 | 1686 | { |
c4f5f942 KS |
1687 | return udev_device->timeout; |
1688 | } | |
1689 | ||
8cd2e972 | 1690 | int udev_device_set_timeout(struct udev_device *udev_device, int timeout) |
c4f5f942 KS |
1691 | { |
1692 | udev_device->timeout = timeout; | |
1693 | return 0; | |
1694 | } | |
8cd2e972 | 1695 | int udev_device_get_event_timeout(struct udev_device *udev_device) |
99214844 KS |
1696 | { |
1697 | if (!udev_device->info_loaded) | |
5f59fa09 | 1698 | udev_device_read_db(udev_device, NULL); |
99214844 KS |
1699 | return udev_device->event_timeout; |
1700 | } | |
1701 | ||
8cd2e972 | 1702 | int udev_device_set_event_timeout(struct udev_device *udev_device, int event_timeout) |
99214844 | 1703 | { |
4281da1f KS |
1704 | char num[32]; |
1705 | ||
99214844 | 1706 | udev_device->event_timeout = event_timeout; |
4281da1f KS |
1707 | snprintf(num, sizeof(num), "%u", event_timeout); |
1708 | udev_device_add_property(udev_device, "TIMEOUT", num); | |
99214844 KS |
1709 | return 0; |
1710 | } | |
c4f5f942 | 1711 | |
8cd2e972 | 1712 | int udev_device_set_seqnum(struct udev_device *udev_device, unsigned long long int seqnum) |
37372bbc | 1713 | { |
31f4b036 KS |
1714 | char num[32]; |
1715 | ||
37372bbc | 1716 | udev_device->seqnum = seqnum; |
31f4b036 KS |
1717 | snprintf(num, sizeof(num), "%llu", seqnum); |
1718 | udev_device_add_property(udev_device, "SEQNUM", num); | |
37372bbc KS |
1719 | return 0; |
1720 | } | |
1721 | ||
8cd2e972 | 1722 | int udev_device_set_devnum(struct udev_device *udev_device, dev_t devnum) |
c4f5f942 | 1723 | { |
31f4b036 KS |
1724 | char num[32]; |
1725 | ||
c4f5f942 | 1726 | udev_device->devnum = devnum; |
31f4b036 KS |
1727 | |
1728 | snprintf(num, sizeof(num), "%u", major(devnum)); | |
1729 | udev_device_add_property(udev_device, "MAJOR", num); | |
1730 | snprintf(num, sizeof(num), "%u", minor(devnum)); | |
1731 | udev_device_add_property(udev_device, "MINOR", num); | |
c4f5f942 KS |
1732 | return 0; |
1733 | } | |
6bd1c78a | 1734 | |
8cd2e972 | 1735 | int udev_device_get_devlink_priority(struct udev_device *udev_device) |
6bd1c78a | 1736 | { |
99214844 | 1737 | if (!udev_device->info_loaded) |
5f59fa09 | 1738 | udev_device_read_db(udev_device, NULL); |
e88a82b5 | 1739 | return udev_device->devlink_priority; |
6bd1c78a KS |
1740 | } |
1741 | ||
8cd2e972 | 1742 | int udev_device_set_devlink_priority(struct udev_device *udev_device, int prio) |
6bd1c78a | 1743 | { |
e88a82b5 KS |
1744 | udev_device->devlink_priority = prio; |
1745 | return 0; | |
6bd1c78a KS |
1746 | } |
1747 | ||
d7ce7539 SJR |
1748 | int udev_device_get_watch_handle(struct udev_device *udev_device) |
1749 | { | |
1750 | if (!udev_device->info_loaded) | |
5f59fa09 | 1751 | udev_device_read_db(udev_device, NULL); |
d7ce7539 SJR |
1752 | return udev_device->watch_handle; |
1753 | } | |
1754 | ||
1755 | int udev_device_set_watch_handle(struct udev_device *udev_device, int handle) | |
1756 | { | |
1757 | udev_device->watch_handle = handle; | |
1758 | return 0; | |
1759 | } | |
fc416258 KS |
1760 | |
1761 | int udev_device_get_ifindex(struct udev_device *udev_device) | |
1762 | { | |
ff0e1f4e KS |
1763 | if (!udev_device->info_loaded) |
1764 | udev_device_read_uevent_file(udev_device); | |
fc416258 KS |
1765 | return udev_device->ifindex; |
1766 | } | |
1767 | ||
1768 | int udev_device_set_ifindex(struct udev_device *udev_device, int ifindex) | |
1769 | { | |
4281da1f KS |
1770 | char num[32]; |
1771 | ||
fc416258 | 1772 | udev_device->ifindex = ifindex; |
4281da1f KS |
1773 | snprintf(num, sizeof(num), "%u", ifindex); |
1774 | udev_device_add_property(udev_device, "IFINDEX", num); | |
fc416258 KS |
1775 | return 0; |
1776 | } |