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Commit | Line | Data |
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eb1f0e66 KS |
1 | /* |
2 | * libudev - interface to udev device information | |
3 | * | |
065db052 | 4 | * Copyright (C) 2008-2009 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> | |
16 | #include <errno.h> | |
17 | #include <string.h> | |
18 | #include <dirent.h> | |
93b0f384 | 19 | #include <fcntl.h> |
517814e7 | 20 | #include <ctype.h> |
eb1f0e66 KS |
21 | #include <sys/stat.h> |
22 | ||
23 | #include "libudev.h" | |
24 | #include "libudev-private.h" | |
eb1f0e66 | 25 | |
ce1d6d7f KS |
26 | /** |
27 | * SECTION:libudev-device | |
28 | * @short_description: kernel sys devices | |
29 | * | |
30 | * Representation of kernel sys devices. Devices are uniquely identified | |
31 | * by their syspath, every device has exactly one path in the kernel sys | |
32 | * filesystem. Devices usually belong to a kernel subsystem, and and have | |
33 | * a unique name inside that subsytem. | |
34 | */ | |
35 | ||
1e511322 KS |
36 | /** |
37 | * udev_device: | |
38 | * | |
ce1d6d7f | 39 | * Opaque object representing one kernel sys device. |
1e511322 | 40 | */ |
11d543c1 | 41 | struct udev_device { |
11d543c1 | 42 | struct udev *udev; |
b2d9e4f2 | 43 | struct udev_device *parent_device; |
11d543c1 | 44 | char *syspath; |
4ad3a37f | 45 | const char *devpath; |
517814e7 KS |
46 | char *sysname; |
47 | const char *sysnum; | |
99214844 | 48 | char *devnode; |
11d543c1 | 49 | char *subsystem; |
bf8b2ae1 | 50 | char *devtype; |
979ff016 | 51 | char *driver; |
c4f5f942 | 52 | char *action; |
c4f5f942 | 53 | char *devpath_old; |
cb14f454 | 54 | char *knodename; |
6493e655 | 55 | char **envp; |
c2654402 KS |
56 | char *monitor_buf; |
57 | size_t monitor_buf_len; | |
b99028c9 KS |
58 | struct udev_list_node devlinks_list; |
59 | struct udev_list_node properties_list; | |
60 | struct udev_list_node sysattr_list; | |
6bd1c78a | 61 | unsigned long long int seqnum; |
b99028c9 KS |
62 | int event_timeout; |
63 | int timeout; | |
6bd1c78a | 64 | int num_fake_partitions; |
e88a82b5 | 65 | int devlink_priority; |
b99028c9 KS |
66 | int refcount; |
67 | dev_t devnum; | |
d7ce7539 | 68 | int watch_handle; |
b99028c9 KS |
69 | unsigned int parent_set:1; |
70 | unsigned int subsystem_set:1; | |
bf8b2ae1 | 71 | unsigned int devtype_set:1; |
b99028c9 KS |
72 | unsigned int devlinks_uptodate:1; |
73 | unsigned int envp_uptodate:1; | |
74 | unsigned int driver_set:1; | |
75 | unsigned int info_loaded:1; | |
76 | unsigned int ignore_remove:1; | |
11d543c1 KS |
77 | }; |
78 | ||
9a997ecf | 79 | static size_t devpath_to_db_path(struct udev *udev, const char *devpath, char *filename, size_t len) |
e88a82b5 | 80 | { |
065db052 KS |
81 | char *s; |
82 | size_t l; | |
e88a82b5 | 83 | |
065db052 KS |
84 | s = filename; |
85 | l = util_strpcpyl(&s, len, udev_get_dev_path(udev), "/.udev/db/", NULL); | |
81469dae | 86 | return util_path_encode(devpath, s, l); |
e88a82b5 KS |
87 | } |
88 | ||
77b852f3 | 89 | int udev_device_read_db(struct udev_device *udev_device) |
e88a82b5 KS |
90 | { |
91 | struct stat stats; | |
3eb46ec6 KS |
92 | char filename[UTIL_PATH_SIZE]; |
93 | char line[UTIL_LINE_SIZE]; | |
e88a82b5 | 94 | FILE *f; |
e88a82b5 | 95 | |
9a997ecf | 96 | devpath_to_db_path(udev_device->udev, udev_device->devpath, filename, sizeof(filename)); |
e88a82b5 KS |
97 | |
98 | if (lstat(filename, &stats) != 0) { | |
86b57788 | 99 | dbg(udev_device->udev, "no db file to read %s: %m\n", filename); |
e88a82b5 KS |
100 | return -1; |
101 | } | |
102 | if ((stats.st_mode & S_IFMT) == S_IFLNK) { | |
3eb46ec6 | 103 | char target[UTIL_PATH_SIZE]; |
517814e7 | 104 | char devnode[UTIL_PATH_SIZE]; |
e88a82b5 | 105 | int target_len; |
1e75cda3 | 106 | char *next; |
e88a82b5 | 107 | |
e88a82b5 KS |
108 | target_len = readlink(filename, target, sizeof(target)); |
109 | if (target_len > 0) | |
110 | target[target_len] = '\0'; | |
111 | else { | |
86b57788 | 112 | dbg(udev_device->udev, "error reading db link %s: %m\n", filename); |
e88a82b5 KS |
113 | return -1; |
114 | } | |
1e75cda3 KS |
115 | |
116 | next = strchr(target, ' '); | |
117 | if (next != NULL) { | |
118 | next[0] = '\0'; | |
119 | next = &next[1]; | |
120 | } | |
065db052 | 121 | util_strscpyl(devnode, sizeof(devnode), udev_get_dev_path(udev_device->udev), "/", target, NULL); |
517814e7 | 122 | udev_device_set_devnode(udev_device, devnode); |
1e75cda3 | 123 | while (next != NULL) { |
517814e7 | 124 | char devlink[UTIL_PATH_SIZE]; |
1e75cda3 KS |
125 | const char *lnk; |
126 | ||
127 | lnk = next; | |
128 | next = strchr(next, ' '); | |
129 | if (next != NULL) { | |
130 | next[0] = '\0'; | |
131 | next = &next[1]; | |
132 | } | |
065db052 | 133 | util_strscpyl(devlink, sizeof(devlink), udev_get_dev_path(udev_device->udev), "/", lnk, NULL); |
517814e7 | 134 | udev_device_add_devlink(udev_device, devlink); |
1e75cda3 | 135 | } |
99214844 | 136 | info(udev_device->udev, "device %p filled with db symlink data '%s'\n", udev_device, udev_device->devnode); |
e88a82b5 KS |
137 | return 0; |
138 | } | |
139 | ||
140 | f = fopen(filename, "r"); | |
141 | if (f == NULL) { | |
86b57788 | 142 | dbg(udev_device->udev, "error reading db file %s: %m\n", filename); |
e88a82b5 KS |
143 | return -1; |
144 | } | |
145 | while (fgets(line, sizeof(line), f)) { | |
146 | ssize_t len; | |
147 | const char *val; | |
e88a82b5 KS |
148 | |
149 | len = strlen(line); | |
150 | if (len < 4) | |
151 | break; | |
152 | line[len-1] = '\0'; | |
153 | val = &line[2]; | |
e88a82b5 KS |
154 | switch(line[0]) { |
155 | case 'N': | |
065db052 | 156 | util_strscpyl(filename, sizeof(filename), udev_get_dev_path(udev_device->udev), "/", val, NULL); |
517814e7 | 157 | udev_device_set_devnode(udev_device, filename); |
e88a82b5 | 158 | break; |
e88a82b5 | 159 | case 'S': |
065db052 | 160 | util_strscpyl(filename, sizeof(filename), udev_get_dev_path(udev_device->udev), "/", val, NULL); |
8cd2e972 | 161 | udev_device_add_devlink(udev_device, filename); |
e88a82b5 KS |
162 | break; |
163 | case 'L': | |
8cd2e972 | 164 | udev_device_set_devlink_priority(udev_device, atoi(val)); |
e88a82b5 KS |
165 | break; |
166 | case 'T': | |
8cd2e972 | 167 | udev_device_set_event_timeout(udev_device, atoi(val)); |
e88a82b5 KS |
168 | break; |
169 | case 'A': | |
8cd2e972 | 170 | udev_device_set_num_fake_partitions(udev_device, atoi(val)); |
e88a82b5 KS |
171 | break; |
172 | case 'R': | |
8cd2e972 | 173 | udev_device_set_ignore_remove(udev_device, atoi(val)); |
e88a82b5 KS |
174 | break; |
175 | case 'E': | |
8cd2e972 | 176 | udev_device_add_property_from_string(udev_device, val); |
e88a82b5 | 177 | break; |
d7ce7539 SJR |
178 | case 'W': |
179 | udev_device_set_watch_handle(udev_device, atoi(val)); | |
180 | break; | |
e88a82b5 KS |
181 | } |
182 | } | |
183 | fclose(f); | |
184 | ||
cd42b50d | 185 | info(udev_device->udev, "device %p filled with db file data\n", udev_device); |
04f5d75f | 186 | return 0; |
e88a82b5 KS |
187 | } |
188 | ||
bd85566c | 189 | int udev_device_read_uevent_file(struct udev_device *udev_device) |
99214844 KS |
190 | { |
191 | char filename[UTIL_PATH_SIZE]; | |
192 | FILE *f; | |
193 | char line[UTIL_LINE_SIZE]; | |
194 | int maj = 0; | |
195 | int min = 0; | |
196 | ||
065db052 | 197 | util_strscpyl(filename, sizeof(filename), udev_device->syspath, "/uevent", NULL); |
99214844 KS |
198 | f = fopen(filename, "r"); |
199 | if (f == NULL) | |
200 | return -1; | |
201 | ||
202 | while (fgets(line, sizeof(line), f)) { | |
203 | char *pos; | |
204 | ||
205 | pos = strchr(line, '\n'); | |
206 | if (pos == NULL) | |
207 | continue; | |
208 | pos[0] = '\0'; | |
209 | ||
bf8b2ae1 MH |
210 | if (strncmp(line, "DEVTYPE=", 8) == 0) |
211 | udev_device_set_devtype(udev_device, &line[8]); | |
212 | else if (strncmp(line, "MAJOR=", 6) == 0) | |
99214844 KS |
213 | maj = strtoull(&line[6], NULL, 10); |
214 | else if (strncmp(line, "MINOR=", 6) == 0) | |
215 | min = strtoull(&line[6], NULL, 10); | |
cb14f454 KS |
216 | else if (strncmp(line, "DEVNAME=", 8) == 0) |
217 | udev_device_set_knodename(udev_device, &line[8]); | |
99214844 | 218 | |
8cd2e972 | 219 | udev_device_add_property_from_string(udev_device, line); |
99214844 KS |
220 | } |
221 | ||
222 | udev_device->devnum = makedev(maj, min); | |
223 | ||
224 | fclose(f); | |
225 | return 0; | |
226 | } | |
227 | ||
77b852f3 | 228 | static void device_load_info(struct udev_device *device) |
99214844 | 229 | { |
517814e7 | 230 | device->info_loaded = 1; |
bd85566c | 231 | udev_device_read_uevent_file(device); |
77b852f3 | 232 | udev_device_read_db(device); |
99214844 KS |
233 | } |
234 | ||
8cd2e972 | 235 | void udev_device_set_info_loaded(struct udev_device *device) |
99214844 KS |
236 | { |
237 | device->info_loaded = 1; | |
238 | } | |
239 | ||
a5710160 | 240 | struct udev_device *udev_device_new(struct udev *udev) |
eb1f0e66 KS |
241 | { |
242 | struct udev_device *udev_device; | |
ebacd6ec | 243 | struct udev_list_entry *list_entry; |
eb1f0e66 | 244 | |
ba6929f6 KS |
245 | if (udev == NULL) |
246 | return NULL; | |
247 | ||
b29a5e4a | 248 | udev_device = calloc(1, sizeof(struct udev_device)); |
eb1f0e66 KS |
249 | if (udev_device == NULL) |
250 | return NULL; | |
eb1f0e66 KS |
251 | udev_device->refcount = 1; |
252 | udev_device->udev = udev; | |
517814e7 | 253 | udev_list_init(&udev_device->devlinks_list); |
8cd2e972 | 254 | udev_list_init(&udev_device->properties_list); |
69239210 | 255 | udev_list_init(&udev_device->sysattr_list); |
979ff016 | 256 | udev_device->event_timeout = -1; |
d7ce7539 | 257 | udev_device->watch_handle = -1; |
ebacd6ec KS |
258 | /* copy global properties */ |
259 | udev_list_entry_foreach(list_entry, udev_get_properties_list_entry(udev)) | |
260 | udev_device_add_property(udev_device, | |
261 | udev_list_entry_get_name(list_entry), | |
262 | udev_list_entry_get_value(list_entry)); | |
86b57788 | 263 | dbg(udev_device->udev, "udev_device: %p created\n", udev_device); |
eb1f0e66 KS |
264 | return udev_device; |
265 | } | |
266 | ||
267 | /** | |
8753fadf | 268 | * udev_device_new_from_syspath: |
eb1f0e66 | 269 | * @udev: udev library context |
8753fadf | 270 | * @syspath: sys device path including sys directory |
eb1f0e66 | 271 | * |
8753fadf KS |
272 | * Create new udev device, and fill in information from the sys |
273 | * device and the udev database entry. The sypath is the absolute | |
274 | * path to the device, including the sys mount point. | |
eb1f0e66 KS |
275 | * |
276 | * The initial refcount is 1, and needs to be decremented to | |
be7de409 | 277 | * release the resources of the udev device. |
eb1f0e66 KS |
278 | * |
279 | * Returns: a new udev device, or #NULL, if it does not exist | |
280 | **/ | |
8753fadf | 281 | struct udev_device *udev_device_new_from_syspath(struct udev *udev, const char *syspath) |
eb1f0e66 | 282 | { |
b95f8a76 KS |
283 | size_t len; |
284 | const char *subdir; | |
3eb46ec6 | 285 | char path[UTIL_PATH_SIZE]; |
62b9dfb6 | 286 | char *pos; |
eb1f0e66 KS |
287 | struct stat statbuf; |
288 | struct udev_device *udev_device; | |
eb1f0e66 | 289 | |
ba6929f6 KS |
290 | if (udev == NULL) |
291 | return NULL; | |
8753fadf | 292 | if (syspath == NULL) |
ba6929f6 KS |
293 | return NULL; |
294 | ||
b95f8a76 KS |
295 | /* path starts in sys */ |
296 | len = strlen(udev_get_sys_path(udev)); | |
297 | if (strncmp(syspath, udev_get_sys_path(udev), len) != 0) { | |
298 | info(udev, "not in sys :%s\n", syspath); | |
eb1f0e66 | 299 | return NULL; |
4ad3a37f | 300 | } |
eb1f0e66 | 301 | |
b95f8a76 KS |
302 | /* path is not a root directory */ |
303 | subdir = &syspath[len+1]; | |
304 | pos = strrchr(subdir, '/'); | |
f454f670 | 305 | if (pos == NULL || pos[1] == '\0' || pos < &subdir[2]) { |
86b57788 | 306 | dbg(udev, "not a subdir :%s\n", syspath); |
eb1f0e66 | 307 | return NULL; |
b95f8a76 | 308 | } |
eb1f0e66 | 309 | |
ba6929f6 | 310 | /* resolve possible symlink to real path */ |
065db052 | 311 | util_strscpy(path, sizeof(path), syspath); |
b21b95d7 | 312 | util_resolve_sys_link(udev, path, sizeof(path)); |
b95f8a76 | 313 | |
62b9dfb6 KS |
314 | /* try to resolve the silly block layout if needed */ |
315 | if (strncmp(&path[len], "/block/", 7) == 0) { | |
316 | char block[UTIL_PATH_SIZE]; | |
317 | char part[UTIL_PATH_SIZE]; | |
318 | ||
065db052 | 319 | util_strscpy(block, sizeof(block), path); |
62b9dfb6 KS |
320 | pos = strrchr(block, '/'); |
321 | if (pos == NULL) | |
322 | return NULL; | |
065db052 | 323 | util_strscpy(part, sizeof(part), pos); |
62b9dfb6 | 324 | pos[0] = '\0'; |
065db052 KS |
325 | if (util_resolve_sys_link(udev, block, sizeof(block)) == 0) |
326 | util_strscpyl(path, sizeof(path), block, part, NULL); | |
62b9dfb6 KS |
327 | } |
328 | ||
b95f8a76 KS |
329 | /* path exists in sys */ |
330 | if (strncmp(&syspath[len], "/devices/", 9) == 0 || | |
331 | strncmp(&syspath[len], "/class/", 7) == 0 || | |
332 | strncmp(&syspath[len], "/block/", 7) == 0) { | |
333 | char file[UTIL_PATH_SIZE]; | |
334 | ||
335 | /* all "devices" require a "uevent" file */ | |
065db052 | 336 | util_strscpyl(file, sizeof(file), path, "/uevent", NULL); |
b95f8a76 | 337 | if (stat(file, &statbuf) != 0) { |
86b57788 | 338 | dbg(udev, "not a device: %s\n", syspath); |
b95f8a76 KS |
339 | return NULL; |
340 | } | |
341 | } else { | |
342 | /* everything else just needs to be a directory */ | |
343 | if (stat(path, &statbuf) != 0 || !S_ISDIR(statbuf.st_mode)) { | |
86b57788 | 344 | dbg(udev, "directory not found: %s\n", syspath); |
b95f8a76 KS |
345 | return NULL; |
346 | } | |
347 | } | |
348 | ||
a5710160 | 349 | udev_device = udev_device_new(udev); |
b95f8a76 KS |
350 | if (udev_device == NULL) |
351 | return NULL; | |
352 | ||
8cd2e972 | 353 | udev_device_set_syspath(udev_device, path); |
7d563a17 | 354 | info(udev, "device %p has devpath '%s'\n", udev_device, udev_device_get_devpath(udev_device)); |
eb1f0e66 | 355 | |
eb1f0e66 KS |
356 | return udev_device; |
357 | } | |
358 | ||
1e511322 KS |
359 | /** |
360 | * udev_device_new_from_devnum: | |
361 | * @udev: udev library context | |
362 | * @type: char or block device | |
363 | * @devnum: device major/minor number | |
364 | * | |
365 | * Create new udev device, and fill in information from the sys | |
366 | * device and the udev database entry. The device is looked up | |
367 | * by its major/minor number. Character and block device numbers | |
368 | * are not unique across the two types, they do not share the same | |
369 | * range of numbers. | |
370 | * | |
371 | * The initial refcount is 1, and needs to be decremented to | |
372 | * release the resources of the udev device. | |
373 | * | |
374 | * Returns: a new udev device, or #NULL, if it does not exist | |
375 | **/ | |
4c9dff47 KS |
376 | struct udev_device *udev_device_new_from_devnum(struct udev *udev, char type, dev_t devnum) |
377 | { | |
378 | char path[UTIL_PATH_SIZE]; | |
03198b93 | 379 | const char *type_str; |
438d4c3c | 380 | struct udev_enumerate *udev_enumerate; |
0de33a61 | 381 | struct udev_list_entry *list_entry; |
bf7ad0ea | 382 | struct udev_device *device = NULL; |
03198b93 KS |
383 | |
384 | if (type == 'b') | |
385 | type_str = "block"; | |
386 | else if (type == 'c') | |
387 | type_str = "char"; | |
388 | else | |
389 | return NULL; | |
4c9dff47 | 390 | |
b95f8a76 | 391 | /* /sys/dev/{block,char}/<maj>:<min> link */ |
03198b93 KS |
392 | snprintf(path, sizeof(path), "%s/dev/%s/%u:%u", udev_get_sys_path(udev), |
393 | type_str, major(devnum), minor(devnum)); | |
bf7ad0ea KS |
394 | if (util_resolve_sys_link(udev, path, sizeof(path)) == 0) |
395 | return udev_device_new_from_syspath(udev, path); | |
4c9dff47 | 396 | |
438d4c3c KS |
397 | udev_enumerate = udev_enumerate_new(udev); |
398 | if (udev_enumerate == NULL) | |
399 | return NULL; | |
400 | ||
bc8184ed KS |
401 | /* fallback to search sys devices for the major/minor */ |
402 | if (type == 'b') | |
c97f839e | 403 | udev_enumerate_add_match_subsystem(udev_enumerate, "block"); |
bc8184ed | 404 | else if (type == 'c') |
c97f839e KS |
405 | udev_enumerate_add_nomatch_subsystem(udev_enumerate, "block"); |
406 | udev_enumerate_scan_devices(udev_enumerate); | |
438d4c3c | 407 | udev_list_entry_foreach(list_entry, udev_enumerate_get_list_entry(udev_enumerate)) { |
bf7ad0ea KS |
408 | struct udev_device *device_loop; |
409 | ||
0de33a61 | 410 | device_loop = udev_device_new_from_syspath(udev, udev_list_entry_get_name(list_entry)); |
bf7ad0ea KS |
411 | if (device_loop != NULL) { |
412 | if (udev_device_get_devnum(device_loop) == devnum) { | |
c97f839e | 413 | if (type == 'b' && strcmp(udev_device_get_subsystem(device_loop), "block") != 0) |
bc8184ed | 414 | continue; |
c97f839e | 415 | if (type == 'c' && strcmp(udev_device_get_subsystem(device_loop), "block") == 0) |
bc8184ed | 416 | continue; |
bf7ad0ea KS |
417 | device = device_loop; |
418 | break; | |
419 | } | |
420 | udev_device_unref(device_loop); | |
421 | } | |
bf7ad0ea | 422 | } |
438d4c3c | 423 | udev_enumerate_unref(udev_enumerate); |
bf7ad0ea | 424 | return device; |
4c9dff47 KS |
425 | } |
426 | ||
1e511322 KS |
427 | /** |
428 | * udev_device_new_from_subsystem_sysname: | |
429 | * @udev: udev library context | |
430 | * @subsystem: the subsytem of the device | |
431 | * @sysname: the name of the device | |
432 | * | |
433 | * Create new udev device, and fill in information from the sys | |
434 | * device and the udev database entry. The device is looked up | |
435 | * by the subsytem and name string of the device, like "mem", | |
436 | * "zero", or "block", "sda". | |
437 | * | |
438 | * The initial refcount is 1, and needs to be decremented to | |
439 | * release the resources of the udev device. | |
440 | * | |
441 | * Returns: a new udev device, or #NULL, if it does not exist | |
442 | **/ | |
90d80c2e KS |
443 | struct udev_device *udev_device_new_from_subsystem_sysname(struct udev *udev, const char *subsystem, const char *sysname) |
444 | { | |
90d80c2e KS |
445 | char path_full[UTIL_PATH_SIZE]; |
446 | char *path; | |
065db052 | 447 | size_t l; |
90d80c2e KS |
448 | struct stat statbuf; |
449 | ||
065db052 KS |
450 | path = path_full; |
451 | l = util_strpcpyl(&path, sizeof(path_full), udev_get_sys_path(udev), NULL); | |
90d80c2e KS |
452 | |
453 | if (strcmp(subsystem, "subsystem") == 0) { | |
065db052 | 454 | util_strscpyl(path, l, "/subsystem/", sysname, NULL); |
90d80c2e KS |
455 | if (stat(path_full, &statbuf) == 0) |
456 | goto found; | |
457 | ||
065db052 | 458 | util_strscpyl(path, l, "/bus/", sysname, NULL); |
90d80c2e KS |
459 | if (stat(path_full, &statbuf) == 0) |
460 | goto found; | |
461 | ||
065db052 | 462 | util_strscpyl(path, l, "/class/", sysname, NULL); |
90d80c2e KS |
463 | if (stat(path_full, &statbuf) == 0) |
464 | goto found; | |
465 | goto out; | |
466 | } | |
467 | ||
468 | if (strcmp(subsystem, "module") == 0) { | |
065db052 | 469 | util_strscpyl(path, l, "/module/", sysname, NULL); |
90d80c2e KS |
470 | if (stat(path_full, &statbuf) == 0) |
471 | goto found; | |
472 | goto out; | |
473 | } | |
474 | ||
475 | if (strcmp(subsystem, "drivers") == 0) { | |
476 | char subsys[UTIL_NAME_SIZE]; | |
477 | char *driver; | |
478 | ||
065db052 | 479 | util_strscpy(subsys, sizeof(subsys), sysname); |
90d80c2e KS |
480 | driver = strchr(subsys, ':'); |
481 | if (driver != NULL) { | |
482 | driver[0] = '\0'; | |
483 | driver = &driver[1]; | |
065db052 KS |
484 | |
485 | util_strscpyl(path, l, "/subsystem/", subsys, "/drivers/", driver, NULL); | |
90d80c2e KS |
486 | if (stat(path_full, &statbuf) == 0) |
487 | goto found; | |
488 | ||
065db052 | 489 | util_strscpyl(path, l, "/bus/", subsys, "/drivers/", driver, NULL); |
90d80c2e KS |
490 | if (stat(path_full, &statbuf) == 0) |
491 | goto found; | |
492 | } | |
493 | goto out; | |
494 | } | |
495 | ||
065db052 | 496 | util_strscpyl(path, l, "/subsystem/", subsystem, "/devices/", sysname, NULL); |
90d80c2e KS |
497 | if (stat(path_full, &statbuf) == 0) |
498 | goto found; | |
499 | ||
065db052 | 500 | util_strscpyl(path, l, "/bus/", subsystem, "/devices/", sysname, NULL); |
90d80c2e KS |
501 | if (stat(path_full, &statbuf) == 0) |
502 | goto found; | |
503 | ||
065db052 | 504 | util_strscpyl(path, l, "/class/", subsystem, "/", sysname, NULL); |
90d80c2e KS |
505 | if (stat(path_full, &statbuf) == 0) |
506 | goto found; | |
507 | out: | |
508 | return NULL; | |
509 | found: | |
510 | return udev_device_new_from_syspath(udev, path_full); | |
511 | } | |
512 | ||
b2d9e4f2 | 513 | static struct udev_device *device_new_from_parent(struct udev_device *udev_device) |
4ad3a37f KS |
514 | { |
515 | struct udev_device *udev_device_parent = NULL; | |
516 | char path[UTIL_PATH_SIZE]; | |
b95f8a76 | 517 | const char *subdir; |
4ad3a37f | 518 | |
b95f8a76 KS |
519 | /* follow "device" link in deprecated sys layout */ |
520 | if (strncmp(udev_device->devpath, "/class/", 7) == 0 || | |
521 | strncmp(udev_device->devpath, "/block/", 7) == 0) { | |
065db052 | 522 | util_strscpyl(path, sizeof(path), udev_device->syspath, "/device", NULL); |
f454ecf7 | 523 | if (util_resolve_sys_link(udev_device->udev, path, sizeof(path)) == 0) { |
b95f8a76 | 524 | udev_device_parent = udev_device_new_from_syspath(udev_device->udev, path); |
f454ecf7 KS |
525 | if (udev_device_parent != NULL) |
526 | return udev_device_parent; | |
527 | } | |
b95f8a76 | 528 | } |
4ad3a37f | 529 | |
065db052 | 530 | util_strscpy(path, sizeof(path), udev_device->syspath); |
b95f8a76 | 531 | subdir = &path[strlen(udev_get_sys_path(udev_device->udev))+1]; |
4ad3a37f | 532 | while (1) { |
b95f8a76 KS |
533 | char *pos; |
534 | ||
535 | pos = strrchr(subdir, '/'); | |
536 | if (pos == NULL || pos < &subdir[2]) | |
4ad3a37f KS |
537 | break; |
538 | pos[0] = '\0'; | |
8753fadf | 539 | udev_device_parent = udev_device_new_from_syspath(udev_device->udev, path); |
4ad3a37f | 540 | if (udev_device_parent != NULL) |
0518da3b KS |
541 | return udev_device_parent; |
542 | } | |
0518da3b | 543 | return NULL; |
4ad3a37f KS |
544 | } |
545 | ||
1e511322 KS |
546 | /** |
547 | * udev_device_get_parent: | |
548 | * @udev_device: the device to start searching from | |
549 | * | |
550 | * Find the next parent device, and fill in information from the sys | |
551 | * device and the udev database entry. | |
552 | * | |
553 | * The returned the device is not referenced. It is attached to the | |
554 | * child device, and will be cleaned up when the child device | |
555 | * is cleaned up. | |
556 | * | |
557 | * It is not neccessarily just the upper level directory, empty or not | |
558 | * recognized sys directories are ignored. | |
559 | * | |
560 | * It can be called as many times as needed, without caring about | |
561 | * references. | |
562 | * | |
563 | * Returns: a new udev device, or #NULL, if it no parent exist. | |
564 | **/ | |
b2d9e4f2 KS |
565 | struct udev_device *udev_device_get_parent(struct udev_device *udev_device) |
566 | { | |
b95f8a76 KS |
567 | if (udev_device == NULL) |
568 | return NULL; | |
31f4b036 KS |
569 | if (!udev_device->parent_set) { |
570 | udev_device->parent_set = 1; | |
571 | udev_device->parent_device = device_new_from_parent(udev_device); | |
0518da3b | 572 | } |
31f4b036 | 573 | if (udev_device->parent_device != NULL) |
86b57788 | 574 | dbg(udev_device->udev, "returning existing parent %p\n", udev_device->parent_device); |
b2d9e4f2 KS |
575 | return udev_device->parent_device; |
576 | } | |
577 | ||
1e511322 KS |
578 | /** |
579 | * udev_device_get_parent_with_subsystem_devtype: | |
580 | * @udev_device: udev device to start searching from | |
581 | * @subsystem: the subsytem of the device | |
582 | * @devtype: the type (DEVTYPE) of the device | |
583 | * | |
584 | * Find the next parent device, with a matching subsystem and devtype | |
585 | * value, and fill in information from the sys device and the udev | |
586 | * database entry. | |
587 | * | |
588 | * The returned the device is not referenced. It is attached to the | |
589 | * child device, and will be cleaned up when the child device | |
590 | * is cleaned up. | |
591 | * | |
592 | * It can be called as many times as needed, without caring about | |
593 | * references. | |
594 | * | |
8d6bc73a | 595 | * Returns: a new udev device, or #NULL if no matching parent exists. |
1e511322 | 596 | **/ |
883012d4 | 597 | struct udev_device *udev_device_get_parent_with_subsystem_devtype(struct udev_device *udev_device, const char *subsystem, const char *devtype) |
bf8b2ae1 MH |
598 | { |
599 | struct udev_device *parent; | |
600 | ||
883012d4 MH |
601 | if (subsystem == NULL) |
602 | return NULL; | |
603 | ||
bf8b2ae1 MH |
604 | parent = udev_device_get_parent(udev_device); |
605 | while (parent != NULL) { | |
883012d4 | 606 | const char *parent_subsystem; |
bf8b2ae1 MH |
607 | const char *parent_devtype; |
608 | ||
883012d4 MH |
609 | parent_subsystem = udev_device_get_subsystem(parent); |
610 | if (parent_subsystem != NULL && strcmp(parent_subsystem, subsystem) == 0) { | |
611 | if (devtype == NULL) | |
612 | break; | |
613 | parent_devtype = udev_device_get_devtype(parent); | |
614 | if (parent_devtype != NULL && strcmp(parent_devtype, devtype) == 0) | |
615 | break; | |
616 | } | |
bf8b2ae1 MH |
617 | parent = udev_device_get_parent(parent); |
618 | } | |
619 | return parent; | |
620 | } | |
621 | ||
eb1f0e66 KS |
622 | /** |
623 | * udev_device_get_udev: | |
7d8787b3 | 624 | * @udev_device: udev device |
eb1f0e66 KS |
625 | * |
626 | * Retrieve the udev library context the device was created with. | |
627 | * | |
628 | * Returns: the udev library context | |
629 | **/ | |
630 | struct udev *udev_device_get_udev(struct udev_device *udev_device) | |
631 | { | |
ba6929f6 KS |
632 | if (udev_device == NULL) |
633 | return NULL; | |
eb1f0e66 KS |
634 | return udev_device->udev; |
635 | } | |
636 | ||
637 | /** | |
638 | * udev_device_ref: | |
639 | * @udev_device: udev device | |
640 | * | |
641 | * Take a reference of a udev device. | |
642 | * | |
643 | * Returns: the passed udev device | |
644 | **/ | |
645 | struct udev_device *udev_device_ref(struct udev_device *udev_device) | |
646 | { | |
ba6929f6 KS |
647 | if (udev_device == NULL) |
648 | return NULL; | |
eb1f0e66 KS |
649 | udev_device->refcount++; |
650 | return udev_device; | |
651 | } | |
652 | ||
653 | /** | |
654 | * udev_device_unref: | |
655 | * @udev_device: udev device | |
656 | * | |
657 | * Drop a reference of a udev device. If the refcount reaches zero, | |
be7de409 | 658 | * the resources of the device will be released. |
eb1f0e66 KS |
659 | * |
660 | **/ | |
661 | void udev_device_unref(struct udev_device *udev_device) | |
662 | { | |
ba6929f6 KS |
663 | if (udev_device == NULL) |
664 | return; | |
eb1f0e66 KS |
665 | udev_device->refcount--; |
666 | if (udev_device->refcount > 0) | |
667 | return; | |
b2d9e4f2 KS |
668 | if (udev_device->parent_device != NULL) |
669 | udev_device_unref(udev_device->parent_device); | |
11d543c1 | 670 | free(udev_device->syspath); |
517814e7 | 671 | free(udev_device->sysname); |
99214844 | 672 | free(udev_device->devnode); |
ba6929f6 | 673 | free(udev_device->subsystem); |
bf8b2ae1 | 674 | free(udev_device->devtype); |
eb8837e1 KS |
675 | udev_list_cleanup_entries(udev_device->udev, &udev_device->devlinks_list); |
676 | udev_list_cleanup_entries(udev_device->udev, &udev_device->properties_list); | |
1c7047ea KS |
677 | free(udev_device->action); |
678 | free(udev_device->driver); | |
679 | free(udev_device->devpath_old); | |
cb14f454 | 680 | free(udev_device->knodename); |
69239210 | 681 | udev_list_cleanup_entries(udev_device->udev, &udev_device->sysattr_list); |
6493e655 | 682 | free(udev_device->envp); |
c2654402 | 683 | free(udev_device->monitor_buf); |
86b57788 | 684 | dbg(udev_device->udev, "udev_device: %p released\n", udev_device); |
eb1f0e66 KS |
685 | free(udev_device); |
686 | } | |
687 | ||
688 | /** | |
689 | * udev_device_get_devpath: | |
690 | * @udev_device: udev device | |
691 | * | |
11d543c1 KS |
692 | * Retrieve the kernel devpath value of the udev device. The path |
693 | * does not contain the sys mount point, and starts with a '/'. | |
eb1f0e66 | 694 | * |
11d543c1 | 695 | * Returns: the devpath of the udev device |
eb1f0e66 KS |
696 | **/ |
697 | const char *udev_device_get_devpath(struct udev_device *udev_device) | |
698 | { | |
ba6929f6 KS |
699 | if (udev_device == NULL) |
700 | return NULL; | |
701 | return udev_device->devpath; | |
eb1f0e66 KS |
702 | } |
703 | ||
11d543c1 KS |
704 | /** |
705 | * udev_device_get_syspath: | |
706 | * @udev_device: udev device | |
707 | * | |
708 | * Retrieve the sys path of the udev device. The path is an | |
709 | * absolute path and starts with the sys mount point. | |
710 | * | |
711 | * Returns: the sys path of the udev device | |
712 | **/ | |
713 | const char *udev_device_get_syspath(struct udev_device *udev_device) | |
714 | { | |
715 | if (udev_device == NULL) | |
716 | return NULL; | |
717 | return udev_device->syspath; | |
718 | } | |
719 | ||
1e511322 KS |
720 | /** |
721 | * udev_device_get_sysname: | |
722 | * @udev_device: udev device | |
723 | * | |
724 | * Returns: the sys name of the device device | |
725 | **/ | |
4ad3a37f KS |
726 | const char *udev_device_get_sysname(struct udev_device *udev_device) |
727 | { | |
728 | if (udev_device == NULL) | |
729 | return NULL; | |
730 | return udev_device->sysname; | |
731 | } | |
732 | ||
1e511322 KS |
733 | /** |
734 | * udev_device_get_sysnum: | |
735 | * @udev_device: udev device | |
736 | * | |
737 | * Returns: the trailing number of of the device name | |
738 | **/ | |
517814e7 KS |
739 | const char *udev_device_get_sysnum(struct udev_device *udev_device) |
740 | { | |
741 | if (udev_device == NULL) | |
742 | return NULL; | |
743 | return udev_device->sysnum; | |
744 | } | |
745 | ||
eb1f0e66 | 746 | /** |
fb762bb9 | 747 | * udev_device_get_devnode: |
eb1f0e66 KS |
748 | * @udev_device: udev device |
749 | * | |
750 | * Retrieve the device node file name belonging to the udev device. | |
ba6929f6 | 751 | * The path is an absolute path, and starts with the device directory. |
eb1f0e66 KS |
752 | * |
753 | * Returns: the device node file name of the udev device, or #NULL if no device node exists | |
754 | **/ | |
fb762bb9 | 755 | const char *udev_device_get_devnode(struct udev_device *udev_device) |
eb1f0e66 | 756 | { |
ba6929f6 | 757 | if (udev_device == NULL) |
eb1f0e66 | 758 | return NULL; |
99214844 | 759 | if (!udev_device->info_loaded) |
77b852f3 | 760 | device_load_info(udev_device); |
99214844 | 761 | return udev_device->devnode; |
eb1f0e66 KS |
762 | } |
763 | ||
764 | /** | |
765 | * udev_device_get_subsystem: | |
766 | * @udev_device: udev device | |
767 | * | |
768 | * Retrieve the subsystem string of the udev device. The string does not | |
769 | * contain any "/". | |
770 | * | |
771 | * Returns: the subsystem name of the udev device, or #NULL if it can not be determined | |
772 | **/ | |
773 | const char *udev_device_get_subsystem(struct udev_device *udev_device) | |
774 | { | |
17fcfb59 | 775 | char subsystem[UTIL_NAME_SIZE]; |
ba6929f6 KS |
776 | |
777 | if (udev_device == NULL) | |
778 | return NULL; | |
5c5cad79 KS |
779 | if (!udev_device->subsystem_set) { |
780 | udev_device->subsystem_set = 1; | |
781 | /* read "subsytem" link */ | |
782 | if (util_get_sys_subsystem(udev_device->udev, udev_device->syspath, subsystem, sizeof(subsystem)) > 0) { | |
783 | udev_device_set_subsystem(udev_device, subsystem); | |
784 | return udev_device->subsystem; | |
785 | } | |
786 | /* implicit names */ | |
787 | if (strncmp(udev_device->devpath, "/module/", 8) == 0) { | |
788 | udev_device_set_subsystem(udev_device, "module"); | |
789 | return udev_device->subsystem; | |
790 | } | |
791 | if (strstr(udev_device->devpath, "/drivers/") != NULL) { | |
792 | udev_device_set_subsystem(udev_device, "drivers"); | |
793 | return udev_device->subsystem; | |
794 | } | |
795 | if (strncmp(udev_device->devpath, "/subsystem/", 11) == 0 || | |
796 | strncmp(udev_device->devpath, "/class/", 7) == 0 || | |
797 | strncmp(udev_device->devpath, "/bus/", 5) == 0) { | |
798 | udev_device_set_subsystem(udev_device, "subsystem"); | |
799 | return udev_device->subsystem; | |
800 | } | |
0518da3b | 801 | } |
5c5cad79 | 802 | return udev_device->subsystem; |
eb1f0e66 KS |
803 | } |
804 | ||
bf8b2ae1 MH |
805 | /** |
806 | * udev_device_get_devtype: | |
807 | * @udev_device: udev device | |
808 | * | |
809 | * Retrieve the devtype string of the udev device. | |
810 | * | |
811 | * Returns: the devtype name of the udev device, or #NULL if it can not be determined | |
812 | **/ | |
813 | const char *udev_device_get_devtype(struct udev_device *udev_device) | |
814 | { | |
815 | if (udev_device == NULL) | |
816 | return NULL; | |
817 | if (!udev_device->devtype_set) { | |
818 | udev_device->devtype_set = 1; | |
b9251174 KS |
819 | if (!udev_device->info_loaded) |
820 | udev_device_read_uevent_file(udev_device); | |
bf8b2ae1 MH |
821 | } |
822 | return udev_device->devtype; | |
823 | } | |
824 | ||
eb1f0e66 | 825 | /** |
0de33a61 | 826 | * udev_device_get_devlinks_list_entry: |
eb1f0e66 | 827 | * @udev_device: udev device |
eb1f0e66 | 828 | * |
bf7ad0ea KS |
829 | * Retrieve the list of device links pointing to the device file of |
830 | * the udev device. The next list entry can be retrieved with | |
e345e267 | 831 | * udev_list_entry_next(), which returns #NULL if no more entries exist. |
bf7ad0ea | 832 | * The devlink path can be retrieved from the list entry by |
e345e267 | 833 | * udev_list_entry_get_name(). The path is an absolute path, and starts with |
bf7ad0ea | 834 | * the device directory. |
eb1f0e66 | 835 | * |
bf7ad0ea | 836 | * Returns: the first entry of the device node link list |
eb1f0e66 | 837 | **/ |
0de33a61 | 838 | struct udev_list_entry *udev_device_get_devlinks_list_entry(struct udev_device *udev_device) |
eb1f0e66 | 839 | { |
99214844 KS |
840 | if (udev_device == NULL) |
841 | return NULL; | |
842 | if (!udev_device->info_loaded) | |
77b852f3 | 843 | device_load_info(udev_device); |
517814e7 | 844 | return udev_list_get_entry(&udev_device->devlinks_list); |
eb1f0e66 KS |
845 | } |
846 | ||
979ff016 KS |
847 | void udev_device_cleanup_devlinks_list(struct udev_device *udev_device) |
848 | { | |
bd85566c | 849 | udev_device->devlinks_uptodate = 0; |
eb8837e1 | 850 | udev_list_cleanup_entries(udev_device->udev, &udev_device->devlinks_list); |
979ff016 KS |
851 | } |
852 | ||
eb1f0e66 | 853 | /** |
0de33a61 | 854 | * udev_device_get_properties_list_entry: |
eb1f0e66 | 855 | * @udev_device: udev device |
eb1f0e66 | 856 | * |
bf7ad0ea | 857 | * Retrieve the list of key/value device properties of the udev |
e345e267 | 858 | * device. The next list entry can be retrieved with udev_list_entry_next(), |
bf7ad0ea KS |
859 | * which returns #NULL if no more entries exist. The property name |
860 | * can be retrieved from the list entry by udev_list_get_name(), | |
861 | * the property value by udev_list_get_value(). | |
eb1f0e66 | 862 | * |
bf7ad0ea | 863 | * Returns: the first entry of the property list |
eb1f0e66 | 864 | **/ |
0de33a61 | 865 | struct udev_list_entry *udev_device_get_properties_list_entry(struct udev_device *udev_device) |
eb1f0e66 | 866 | { |
99214844 KS |
867 | if (udev_device == NULL) |
868 | return NULL; | |
869 | if (!udev_device->info_loaded) | |
77b852f3 | 870 | device_load_info(udev_device); |
bd85566c KS |
871 | if (!udev_device->devlinks_uptodate) { |
872 | char symlinks[UTIL_PATH_SIZE]; | |
873 | struct udev_list_entry *list_entry; | |
874 | ||
875 | udev_device->devlinks_uptodate = 1; | |
876 | list_entry = udev_device_get_devlinks_list_entry(udev_device); | |
877 | if (list_entry != NULL) { | |
065db052 KS |
878 | char *s; |
879 | size_t l; | |
880 | ||
881 | s = symlinks; | |
882 | l = util_strpcpyl(&s, sizeof(symlinks), udev_list_entry_get_name(list_entry), NULL); | |
883 | udev_list_entry_foreach(list_entry, udev_list_entry_get_next(list_entry)) | |
884 | l = util_strpcpyl(&s, l, " ", udev_list_entry_get_name(list_entry), NULL); | |
bd85566c KS |
885 | udev_device_add_property(udev_device, "DEVLINKS", symlinks); |
886 | } | |
887 | } | |
8cd2e972 | 888 | return udev_list_get_entry(&udev_device->properties_list); |
eb1f0e66 | 889 | } |
11d543c1 | 890 | |
1e511322 KS |
891 | /** |
892 | * udev_device_get_driver: | |
893 | * @udev_device: udev device | |
894 | * | |
ce1d6d7f | 895 | * Returns: the driver string, or #NULL if there is no driver attached. |
1e511322 | 896 | **/ |
c4f5f942 KS |
897 | const char *udev_device_get_driver(struct udev_device *udev_device) |
898 | { | |
17fcfb59 | 899 | char driver[UTIL_NAME_SIZE]; |
95d90c4f | 900 | |
c4f5f942 KS |
901 | if (udev_device == NULL) |
902 | return NULL; | |
5c5cad79 KS |
903 | if (!udev_device->driver_set) { |
904 | udev_device->driver_set = 1; | |
905 | if (util_get_sys_driver(udev_device->udev, udev_device->syspath, driver, sizeof(driver)) > 0) | |
906 | udev_device->driver = strdup(driver); | |
907 | } | |
c4f5f942 KS |
908 | return udev_device->driver; |
909 | } | |
910 | ||
1e511322 KS |
911 | /** |
912 | * udev_device_get_devnum: | |
913 | * @udev_device: udev device | |
914 | * | |
915 | * Returns: the device major/minor number. | |
916 | **/ | |
c4f5f942 KS |
917 | dev_t udev_device_get_devnum(struct udev_device *udev_device) |
918 | { | |
919 | if (udev_device == NULL) | |
920 | return makedev(0, 0); | |
99214844 | 921 | if (!udev_device->info_loaded) |
77b852f3 | 922 | device_load_info(udev_device); |
c4f5f942 KS |
923 | return udev_device->devnum; |
924 | } | |
925 | ||
1e511322 KS |
926 | /** |
927 | * udev_device_get_action: | |
928 | * @udev_device: udev device | |
929 | * | |
930 | * This is only valid if the device was received through a monitor. Devices read from | |
931 | * sys do not have an action string. Usual actions are: add, remove, change, online, | |
932 | * offline. | |
933 | * | |
934 | * Returns: the kernel action value, or #NULL if there is no action value available. | |
935 | **/ | |
c4f5f942 KS |
936 | const char *udev_device_get_action(struct udev_device *udev_device) |
937 | { | |
938 | if (udev_device == NULL) | |
939 | return NULL; | |
940 | return udev_device->action; | |
941 | } | |
942 | ||
1e511322 KS |
943 | /** |
944 | * udev_device_get_devnum: | |
945 | * @udev_device: udev device | |
946 | * | |
947 | * This is only valid if the device was received through a monitor. Devices read from | |
948 | * sys do not have a sequence number. | |
949 | * | |
950 | * Returns: the kernel event sequence number, or 0 if there is no sequence number available. | |
951 | **/ | |
37372bbc KS |
952 | unsigned long long int udev_device_get_seqnum(struct udev_device *udev_device) |
953 | { | |
954 | if (udev_device == NULL) | |
955 | return 0; | |
956 | return udev_device->seqnum; | |
957 | } | |
958 | ||
1e511322 KS |
959 | /** |
960 | * udev_device_get_sysattr_value: | |
961 | * @udev_device: udev device | |
962 | * @sysattr: attribute name | |
963 | * | |
964 | * The retrieved value is cached in the device. Repeated reads will return the same | |
965 | * value and not open the attribute again. | |
966 | * | |
967 | * Returns: the content of a sys attribute file, or #NULL if there is no sys attribute value. | |
968 | **/ | |
69239210 | 969 | const char *udev_device_get_sysattr_value(struct udev_device *udev_device, const char *sysattr) |
93b0f384 | 970 | { |
0de33a61 | 971 | struct udev_list_entry *list_entry; |
93b0f384 | 972 | char path[UTIL_PATH_SIZE]; |
affed87a | 973 | char value[4096]; |
93b0f384 KS |
974 | struct stat statbuf; |
975 | int fd; | |
976 | ssize_t size; | |
977 | const char *val = NULL; | |
978 | ||
517814e7 KS |
979 | if (udev_device == NULL) |
980 | return NULL; | |
69239210 | 981 | if (sysattr == NULL) |
517814e7 KS |
982 | return NULL; |
983 | ||
0518da3b | 984 | /* look for possibly already cached result */ |
69239210 KS |
985 | udev_list_entry_foreach(list_entry, udev_list_get_entry(&udev_device->sysattr_list)) { |
986 | if (strcmp(udev_list_entry_get_name(list_entry), sysattr) == 0) { | |
86b57788 KS |
987 | dbg(udev_device->udev, "got '%s' (%s) from cache\n", |
988 | sysattr, udev_list_entry_get_value(list_entry)); | |
0de33a61 | 989 | return udev_list_entry_get_value(list_entry); |
0518da3b KS |
990 | } |
991 | } | |
992 | ||
065db052 | 993 | util_strscpyl(path, sizeof(path), udev_device_get_syspath(udev_device), "/", sysattr, NULL); |
93b0f384 | 994 | if (lstat(path, &statbuf) != 0) { |
86b57788 | 995 | dbg(udev_device->udev, "no attribute '%s', keep negative entry\n", path); |
69239210 | 996 | udev_list_entry_add(udev_device->udev, &udev_device->sysattr_list, sysattr, NULL, 0, 0); |
93b0f384 KS |
997 | goto out; |
998 | } | |
999 | ||
1000 | if (S_ISLNK(statbuf.st_mode)) { | |
93b0f384 KS |
1001 | char target[UTIL_NAME_SIZE]; |
1002 | int len; | |
1003 | char *pos; | |
1004 | ||
096e59ed KS |
1005 | /* some core links return the last element of the target path */ |
1006 | if (strcmp(sysattr, "driver") != 0 && | |
1007 | strcmp(sysattr, "subsystem") != 0 && | |
1008 | strcmp(sysattr, "module") != 0) | |
1009 | goto out; | |
1010 | ||
93b0f384 KS |
1011 | len = readlink(path, target, sizeof(target)); |
1012 | if (len > 0) { | |
1013 | target[len] = '\0'; | |
1014 | pos = strrchr(target, '/'); | |
1015 | if (pos != NULL) { | |
1016 | pos = &pos[1]; | |
86b57788 | 1017 | dbg(udev_device->udev, "cache '%s' with link value '%s'\n", sysattr, pos); |
69239210 | 1018 | list_entry = udev_list_entry_add(udev_device->udev, &udev_device->sysattr_list, sysattr, pos, 0, 0); |
0de33a61 | 1019 | val = udev_list_entry_get_value(list_entry); |
93b0f384 KS |
1020 | } |
1021 | } | |
1022 | goto out; | |
1023 | } | |
1024 | ||
1025 | /* skip directories */ | |
1026 | if (S_ISDIR(statbuf.st_mode)) | |
1027 | goto out; | |
1028 | ||
1029 | /* skip non-readable files */ | |
1030 | if ((statbuf.st_mode & S_IRUSR) == 0) | |
1031 | goto out; | |
1032 | ||
1033 | /* read attribute value */ | |
1034 | fd = open(path, O_RDONLY); | |
1035 | if (fd < 0) { | |
86b57788 | 1036 | dbg(udev_device->udev, "attribute '%s' can not be opened\n", path); |
93b0f384 KS |
1037 | goto out; |
1038 | } | |
1039 | size = read(fd, value, sizeof(value)); | |
1040 | close(fd); | |
1041 | if (size < 0) | |
1042 | goto out; | |
1043 | if (size == sizeof(value)) | |
1044 | goto out; | |
1045 | ||
0518da3b | 1046 | /* got a valid value, store it in cache and return it */ |
93b0f384 KS |
1047 | value[size] = '\0'; |
1048 | util_remove_trailing_chars(value, '\n'); | |
86b57788 | 1049 | dbg(udev_device->udev, "'%s' has attribute value '%s'\n", path, value); |
69239210 | 1050 | list_entry = udev_list_entry_add(udev_device->udev, &udev_device->sysattr_list, sysattr, value, 0, 0); |
0de33a61 | 1051 | val = udev_list_entry_get_value(list_entry); |
93b0f384 KS |
1052 | out: |
1053 | return val; | |
1054 | } | |
517814e7 | 1055 | |
8cd2e972 | 1056 | int udev_device_set_syspath(struct udev_device *udev_device, const char *syspath) |
11d543c1 | 1057 | { |
8753fadf | 1058 | const char *pos; |
517814e7 | 1059 | size_t len; |
8753fadf | 1060 | |
8cd2e972 | 1061 | free(udev_device->syspath); |
8753fadf KS |
1062 | udev_device->syspath = strdup(syspath); |
1063 | if (udev_device->syspath == NULL) | |
11d543c1 KS |
1064 | return -ENOMEM; |
1065 | udev_device->devpath = &udev_device->syspath[strlen(udev_get_sys_path(udev_device->udev))]; | |
9a997ecf | 1066 | udev_device_add_property(udev_device, "DEVPATH", udev_device->devpath); |
517814e7 | 1067 | |
8753fadf KS |
1068 | pos = strrchr(udev_device->syspath, '/'); |
1069 | if (pos == NULL) | |
1070 | return -EINVAL; | |
517814e7 KS |
1071 | udev_device->sysname = strdup(&pos[1]); |
1072 | if (udev_device->sysname == NULL) | |
1073 | return -ENOMEM; | |
1074 | ||
1075 | /* some devices have '!' in their name, change that to '/' */ | |
1076 | len = 0; | |
1077 | while (udev_device->sysname[len] != '\0') { | |
1078 | if (udev_device->sysname[len] == '!') | |
1079 | udev_device->sysname[len] = '/'; | |
1080 | len++; | |
1081 | } | |
1082 | ||
1083 | /* trailing number */ | |
babcf3cb | 1084 | while (len > 0 && isdigit(udev_device->sysname[--len])) |
517814e7 | 1085 | udev_device->sysnum = &udev_device->sysname[len]; |
babcf3cb AJ |
1086 | |
1087 | /* sysname is completely numeric */ | |
1088 | if (len == 0) | |
1089 | udev_device->sysnum = NULL; | |
1090 | ||
11d543c1 KS |
1091 | return 0; |
1092 | } | |
1093 | ||
8cd2e972 | 1094 | int udev_device_set_subsystem(struct udev_device *udev_device, const char *subsystem) |
11d543c1 | 1095 | { |
979ff016 | 1096 | free(udev_device->subsystem); |
11d543c1 KS |
1097 | udev_device->subsystem = strdup(subsystem); |
1098 | if (udev_device->subsystem == NULL) | |
9a997ecf | 1099 | return -ENOMEM; |
5c5cad79 | 1100 | udev_device->subsystem_set = 1; |
9a997ecf | 1101 | udev_device_add_property(udev_device, "SUBSYSTEM", udev_device->subsystem); |
11d543c1 KS |
1102 | return 0; |
1103 | } | |
1104 | ||
bf8b2ae1 MH |
1105 | int udev_device_set_devtype(struct udev_device *udev_device, const char *devtype) |
1106 | { | |
1107 | free(udev_device->devtype); | |
1108 | udev_device->devtype = strdup(devtype); | |
1109 | if (udev_device->devtype == NULL) | |
1110 | return -ENOMEM; | |
1111 | udev_device->devtype_set = 1; | |
1112 | udev_device_add_property(udev_device, "DEVTYPE", udev_device->devtype); | |
1113 | return 0; | |
1114 | } | |
1115 | ||
8cd2e972 | 1116 | int udev_device_set_devnode(struct udev_device *udev_device, const char *devnode) |
11d543c1 | 1117 | { |
517814e7 | 1118 | free(udev_device->devnode); |
99214844 | 1119 | udev_device->devnode = strdup(devnode); |
bd85566c KS |
1120 | if (devnode == NULL) |
1121 | return 0; | |
99214844 | 1122 | if (udev_device->devnode == NULL) |
11d543c1 | 1123 | return -ENOMEM; |
979ff016 | 1124 | udev_device_add_property(udev_device, "DEVNAME", udev_device->devnode); |
11d543c1 KS |
1125 | return 0; |
1126 | } | |
1127 | ||
8cd2e972 | 1128 | int udev_device_add_devlink(struct udev_device *udev_device, const char *devlink) |
11d543c1 | 1129 | { |
bd85566c | 1130 | udev_device->devlinks_uptodate = 0; |
517814e7 | 1131 | if (udev_list_entry_add(udev_device->udev, &udev_device->devlinks_list, devlink, NULL, 1, 0) == NULL) |
11d543c1 KS |
1132 | return -ENOMEM; |
1133 | return 0; | |
1134 | } | |
1135 | ||
517814e7 | 1136 | struct udev_list_entry *udev_device_add_property(struct udev_device *udev_device, const char *key, const char *value) |
11d543c1 | 1137 | { |
979ff016 | 1138 | udev_device->envp_uptodate = 0; |
ebacd6ec KS |
1139 | if (value == NULL) { |
1140 | struct udev_list_entry *list_entry; | |
1141 | ||
1142 | list_entry = udev_device_get_properties_list_entry(udev_device); | |
1143 | list_entry = udev_list_entry_get_by_name(list_entry, key); | |
1144 | if (list_entry != NULL) | |
1e78dcbe | 1145 | udev_list_entry_delete(list_entry); |
ebacd6ec KS |
1146 | return NULL; |
1147 | } | |
517814e7 | 1148 | return udev_list_entry_add(udev_device->udev, &udev_device->properties_list, key, value, 1, 0); |
11d543c1 | 1149 | } |
c4f5f942 | 1150 | |
517814e7 | 1151 | struct udev_list_entry *udev_device_add_property_from_string(struct udev_device *udev_device, const char *property) |
0518da3b KS |
1152 | { |
1153 | char name[UTIL_PATH_SIZE]; | |
1154 | char *val; | |
1155 | ||
065db052 | 1156 | util_strscpy(name, sizeof(name), property); |
0518da3b KS |
1157 | val = strchr(name, '='); |
1158 | if (val == NULL) | |
517814e7 | 1159 | return NULL; |
0518da3b KS |
1160 | val[0] = '\0'; |
1161 | val = &val[1]; | |
1162 | if (val[0] == '\0') | |
1163 | val = NULL; | |
517814e7 | 1164 | return udev_device_add_property(udev_device, name, val); |
0518da3b KS |
1165 | } |
1166 | ||
1e511322 KS |
1167 | /** |
1168 | * udev_device_get_property_value: | |
1169 | * @udev_device: udev device | |
1170 | * @key: property name | |
1171 | * | |
1172 | * Returns: the value of a device property, or #NULL if there is no such property. | |
1173 | **/ | |
3d7b2831 KS |
1174 | const char *udev_device_get_property_value(struct udev_device *udev_device, const char *key) |
1175 | { | |
1176 | struct udev_list_entry *list_entry; | |
1177 | ||
1178 | if (udev_device == NULL) | |
1179 | return NULL; | |
1180 | if (key == NULL) | |
1181 | return NULL; | |
1182 | ||
1183 | list_entry = udev_device_get_properties_list_entry(udev_device); | |
1184 | list_entry = udev_list_entry_get_by_name(list_entry, key); | |
1185 | return udev_list_entry_get_value(list_entry); | |
1186 | } | |
1187 | ||
6493e655 KS |
1188 | #define ENVP_SIZE 128 |
1189 | #define MONITOR_BUF_SIZE 4096 | |
1190 | static int update_envp_monitor_buf(struct udev_device *udev_device) | |
979ff016 | 1191 | { |
6493e655 | 1192 | struct udev_list_entry *list_entry; |
065db052 KS |
1193 | char *s; |
1194 | size_t l; | |
6493e655 | 1195 | unsigned int i; |
979ff016 | 1196 | |
6493e655 KS |
1197 | /* monitor buffer of property strings */ |
1198 | free(udev_device->monitor_buf); | |
1199 | udev_device->monitor_buf_len = 0; | |
1200 | udev_device->monitor_buf = malloc(MONITOR_BUF_SIZE); | |
1201 | if (udev_device->monitor_buf == NULL) | |
1202 | return -ENOMEM; | |
be18918f | 1203 | |
6493e655 | 1204 | /* envp array, strings will point into monitor buffer */ |
427e20b2 KS |
1205 | if (udev_device->envp == NULL) |
1206 | udev_device->envp = malloc(sizeof(char *) * ENVP_SIZE); | |
6493e655 KS |
1207 | if (udev_device->envp == NULL) |
1208 | return -ENOMEM; | |
979ff016 | 1209 | |
6493e655 | 1210 | i = 0; |
065db052 KS |
1211 | s = udev_device->monitor_buf; |
1212 | l = MONITOR_BUF_SIZE; | |
6493e655 | 1213 | udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(udev_device)) { |
b25a9454 KS |
1214 | const char *key; |
1215 | ||
1216 | key = udev_list_entry_get_name(list_entry); | |
1217 | /* skip private variables */ | |
1218 | if (key[0] == '.') | |
1219 | continue; | |
1220 | ||
6493e655 | 1221 | /* add string to envp array */ |
065db052 | 1222 | udev_device->envp[i++] = s; |
6493e655 KS |
1223 | if (i+1 >= ENVP_SIZE) |
1224 | return -EINVAL; | |
c2654402 | 1225 | |
6493e655 | 1226 | /* add property string to monitor buffer */ |
b25a9454 | 1227 | l = util_strpcpyl(&s, l, key, "=", udev_list_entry_get_value(list_entry), NULL); |
065db052 | 1228 | if (l == 0) |
c2654402 | 1229 | return -EINVAL; |
065db052 | 1230 | s++; |
c2654402 | 1231 | } |
6493e655 | 1232 | udev_device->envp[i] = NULL; |
065db052 | 1233 | udev_device->monitor_buf_len = s - udev_device->monitor_buf; |
6493e655 | 1234 | udev_device->envp_uptodate = 1; |
065db052 KS |
1235 | dbg(udev_device->udev, "filled envp/monitor buffer, %u properties, %zu bytes\n", |
1236 | i, udev_device->monitor_buf_len); | |
6493e655 KS |
1237 | return 0; |
1238 | } | |
1239 | ||
1240 | char **udev_device_get_properties_envp(struct udev_device *udev_device) | |
1241 | { | |
1242 | if (!udev_device->envp_uptodate) | |
c6243a41 | 1243 | if (update_envp_monitor_buf(udev_device) != 0) |
6493e655 KS |
1244 | return NULL; |
1245 | return udev_device->envp; | |
1246 | } | |
1247 | ||
1248 | ssize_t udev_device_get_properties_monitor_buf(struct udev_device *udev_device, const char **buf) | |
1249 | { | |
1250 | if (!udev_device->envp_uptodate) | |
c6243a41 | 1251 | if (update_envp_monitor_buf(udev_device) != 0) |
6493e655 | 1252 | return -EINVAL; |
c2654402 | 1253 | *buf = udev_device->monitor_buf; |
c2654402 KS |
1254 | return udev_device->monitor_buf_len; |
1255 | } | |
1256 | ||
8cd2e972 | 1257 | int udev_device_set_action(struct udev_device *udev_device, const char *action) |
c4f5f942 | 1258 | { |
517814e7 | 1259 | free(udev_device->action); |
c4f5f942 KS |
1260 | udev_device->action = strdup(action); |
1261 | if (udev_device->action == NULL) | |
1262 | return -ENOMEM; | |
31f4b036 | 1263 | udev_device_add_property(udev_device, "ACTION", udev_device->action); |
c4f5f942 KS |
1264 | return 0; |
1265 | } | |
1266 | ||
8cd2e972 | 1267 | int udev_device_set_driver(struct udev_device *udev_device, const char *driver) |
c4f5f942 | 1268 | { |
979ff016 | 1269 | free(udev_device->driver); |
c4f5f942 KS |
1270 | udev_device->driver = strdup(driver); |
1271 | if (udev_device->driver == NULL) | |
1272 | return -ENOMEM; | |
5c5cad79 | 1273 | udev_device->driver_set = 1; |
31f4b036 | 1274 | udev_device_add_property(udev_device, "DRIVER", udev_device->driver); |
c4f5f942 KS |
1275 | return 0; |
1276 | } | |
1277 | ||
8cd2e972 | 1278 | const char *udev_device_get_devpath_old(struct udev_device *udev_device) |
c4f5f942 | 1279 | { |
c4f5f942 KS |
1280 | return udev_device->devpath_old; |
1281 | } | |
1282 | ||
8cd2e972 | 1283 | int udev_device_set_devpath_old(struct udev_device *udev_device, const char *devpath_old) |
c4f5f942 KS |
1284 | { |
1285 | udev_device->devpath_old = strdup(devpath_old); | |
1286 | if (udev_device->devpath_old == NULL) | |
1287 | return -ENOMEM; | |
31f4b036 | 1288 | udev_device_add_property(udev_device, "DEVPATH_OLD", udev_device->devpath_old); |
c4f5f942 KS |
1289 | return 0; |
1290 | } | |
1291 | ||
cb14f454 KS |
1292 | const char *udev_device_get_knodename(struct udev_device *udev_device) |
1293 | { | |
1294 | return udev_device->knodename; | |
1295 | } | |
1296 | ||
1297 | int udev_device_set_knodename(struct udev_device *udev_device, const char *knodename) | |
1298 | { | |
1299 | udev_device->knodename = strdup(knodename); | |
1300 | if (udev_device->knodename == NULL) | |
1301 | return -ENOMEM; | |
1302 | return 0; | |
1303 | } | |
1304 | ||
8cd2e972 | 1305 | int udev_device_get_timeout(struct udev_device *udev_device) |
c4f5f942 | 1306 | { |
c4f5f942 KS |
1307 | return udev_device->timeout; |
1308 | } | |
1309 | ||
8cd2e972 | 1310 | int udev_device_set_timeout(struct udev_device *udev_device, int timeout) |
c4f5f942 KS |
1311 | { |
1312 | udev_device->timeout = timeout; | |
1313 | return 0; | |
1314 | } | |
8cd2e972 | 1315 | int udev_device_get_event_timeout(struct udev_device *udev_device) |
99214844 KS |
1316 | { |
1317 | if (!udev_device->info_loaded) | |
77b852f3 | 1318 | device_load_info(udev_device); |
99214844 KS |
1319 | return udev_device->event_timeout; |
1320 | } | |
1321 | ||
8cd2e972 | 1322 | int udev_device_set_event_timeout(struct udev_device *udev_device, int event_timeout) |
99214844 KS |
1323 | { |
1324 | udev_device->event_timeout = event_timeout; | |
1325 | return 0; | |
1326 | } | |
c4f5f942 | 1327 | |
8cd2e972 | 1328 | int udev_device_set_seqnum(struct udev_device *udev_device, unsigned long long int seqnum) |
37372bbc | 1329 | { |
31f4b036 KS |
1330 | char num[32]; |
1331 | ||
37372bbc | 1332 | udev_device->seqnum = seqnum; |
31f4b036 KS |
1333 | snprintf(num, sizeof(num), "%llu", seqnum); |
1334 | udev_device_add_property(udev_device, "SEQNUM", num); | |
37372bbc KS |
1335 | return 0; |
1336 | } | |
1337 | ||
8cd2e972 | 1338 | int udev_device_set_devnum(struct udev_device *udev_device, dev_t devnum) |
c4f5f942 | 1339 | { |
31f4b036 KS |
1340 | char num[32]; |
1341 | ||
c4f5f942 | 1342 | udev_device->devnum = devnum; |
31f4b036 KS |
1343 | |
1344 | snprintf(num, sizeof(num), "%u", major(devnum)); | |
1345 | udev_device_add_property(udev_device, "MAJOR", num); | |
1346 | snprintf(num, sizeof(num), "%u", minor(devnum)); | |
1347 | udev_device_add_property(udev_device, "MINOR", num); | |
c4f5f942 KS |
1348 | return 0; |
1349 | } | |
6bd1c78a | 1350 | |
8cd2e972 | 1351 | int udev_device_get_num_fake_partitions(struct udev_device *udev_device) |
6bd1c78a | 1352 | { |
99214844 | 1353 | if (!udev_device->info_loaded) |
77b852f3 | 1354 | device_load_info(udev_device); |
6bd1c78a KS |
1355 | return udev_device->num_fake_partitions; |
1356 | } | |
1357 | ||
8cd2e972 | 1358 | int udev_device_set_num_fake_partitions(struct udev_device *udev_device, int num) |
6bd1c78a KS |
1359 | { |
1360 | udev_device->num_fake_partitions = num; | |
e88a82b5 | 1361 | return 0; |
6bd1c78a KS |
1362 | } |
1363 | ||
8cd2e972 | 1364 | int udev_device_get_devlink_priority(struct udev_device *udev_device) |
6bd1c78a | 1365 | { |
99214844 | 1366 | if (!udev_device->info_loaded) |
77b852f3 | 1367 | device_load_info(udev_device); |
e88a82b5 | 1368 | return udev_device->devlink_priority; |
6bd1c78a KS |
1369 | } |
1370 | ||
8cd2e972 | 1371 | int udev_device_set_devlink_priority(struct udev_device *udev_device, int prio) |
6bd1c78a | 1372 | { |
e88a82b5 KS |
1373 | udev_device->devlink_priority = prio; |
1374 | return 0; | |
6bd1c78a KS |
1375 | } |
1376 | ||
8cd2e972 | 1377 | int udev_device_get_ignore_remove(struct udev_device *udev_device) |
6bd1c78a | 1378 | { |
99214844 | 1379 | if (!udev_device->info_loaded) |
77b852f3 | 1380 | device_load_info(udev_device); |
6bd1c78a KS |
1381 | return udev_device->ignore_remove; |
1382 | } | |
1383 | ||
8cd2e972 | 1384 | int udev_device_set_ignore_remove(struct udev_device *udev_device, int ignore) |
6bd1c78a | 1385 | { |
e88a82b5 KS |
1386 | udev_device->ignore_remove = ignore; |
1387 | return 0; | |
6bd1c78a | 1388 | } |
d7ce7539 SJR |
1389 | |
1390 | int udev_device_get_watch_handle(struct udev_device *udev_device) | |
1391 | { | |
1392 | if (!udev_device->info_loaded) | |
1393 | device_load_info(udev_device); | |
1394 | return udev_device->watch_handle; | |
1395 | } | |
1396 | ||
1397 | int udev_device_set_watch_handle(struct udev_device *udev_device, int handle) | |
1398 | { | |
1399 | udev_device->watch_handle = handle; | |
1400 | return 0; | |
1401 | } |