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1 | /* | |
2 | * Copyright (C) 2004-2009 Kay Sievers <kay.sievers@vrfy.org> | |
3 | * | |
4 | * This program is free software: you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * the Free Software Foundation, either version 2 of the License, or | |
7 | * (at your option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
16 | */ | |
17 | ||
18 | #include <stdlib.h> | |
19 | #include <string.h> | |
20 | #include <stdio.h> | |
21 | #include <stddef.h> | |
22 | #include <ctype.h> | |
23 | #include <stdarg.h> | |
24 | #include <unistd.h> | |
25 | #include <dirent.h> | |
26 | #include <errno.h> | |
27 | #include <getopt.h> | |
28 | #include <fcntl.h> | |
29 | #include <sys/stat.h> | |
30 | #include <sys/types.h> | |
31 | ||
32 | #include "udev.h" | |
33 | ||
34 | static bool skip_attribute(const char *name) | |
35 | { | |
36 | static const char const *skip[] = { | |
37 | "uevent", | |
38 | "dev", | |
39 | "modalias", | |
40 | "resource", | |
41 | "driver", | |
42 | "subsystem", | |
43 | "module", | |
44 | }; | |
45 | unsigned int i; | |
46 | ||
47 | for (i = 0; i < ARRAY_SIZE(skip); i++) | |
48 | if (strcmp(name, skip[i]) == 0) | |
49 | return true; | |
50 | return false; | |
51 | } | |
52 | ||
53 | static void print_all_attributes(struct udev_device *device, const char *key) | |
54 | { | |
55 | struct udev *udev = udev_device_get_udev(device); | |
56 | struct udev_list_entry *sysattr; | |
57 | ||
58 | udev_list_entry_foreach(sysattr, udev_device_get_sysattr_list_entry(device)) { | |
59 | const char *name; | |
60 | const char *value; | |
61 | size_t len; | |
62 | ||
63 | name = udev_list_entry_get_name(sysattr); | |
64 | if (skip_attribute(name)) | |
65 | continue; | |
66 | ||
67 | value = udev_device_get_sysattr_value(device, name); | |
68 | if (value == NULL) | |
69 | continue; | |
70 | dbg(udev, "attr '%s'='%s'\n", name, value); | |
71 | ||
72 | /* skip any values that look like a path */ | |
73 | if (value[0] == '/') | |
74 | continue; | |
75 | ||
76 | /* skip nonprintable attributes */ | |
77 | len = strlen(value); | |
78 | while (len > 0 && isprint(value[len-1])) | |
79 | len--; | |
80 | if (len > 0) { | |
81 | dbg(udev, "attribute value of '%s' non-printable, skip\n", name); | |
82 | continue; | |
83 | } | |
84 | ||
85 | printf(" %s{%s}==\"%s\"\n", key, name, value); | |
86 | } | |
87 | printf("\n"); | |
88 | } | |
89 | ||
90 | static int print_device_chain(struct udev_device *device) | |
91 | { | |
92 | struct udev_device *device_parent; | |
93 | const char *str; | |
94 | ||
95 | printf("\n" | |
96 | "Udevadm info starts with the device specified by the devpath and then\n" | |
97 | "walks up the chain of parent devices. It prints for every device\n" | |
98 | "found, all possible attributes in the udev rules key format.\n" | |
99 | "A rule to match, can be composed by the attributes of the device\n" | |
100 | "and the attributes from one single parent device.\n" | |
101 | "\n"); | |
102 | ||
103 | printf(" looking at device '%s':\n", udev_device_get_devpath(device)); | |
104 | printf(" KERNEL==\"%s\"\n", udev_device_get_sysname(device)); | |
105 | str = udev_device_get_subsystem(device); | |
106 | if (str == NULL) | |
107 | str = ""; | |
108 | printf(" SUBSYSTEM==\"%s\"\n", str); | |
109 | str = udev_device_get_driver(device); | |
110 | if (str == NULL) | |
111 | str = ""; | |
112 | printf(" DRIVER==\"%s\"\n", str); | |
113 | print_all_attributes(device, "ATTR"); | |
114 | ||
115 | device_parent = device; | |
116 | do { | |
117 | device_parent = udev_device_get_parent(device_parent); | |
118 | if (device_parent == NULL) | |
119 | break; | |
120 | printf(" looking at parent device '%s':\n", udev_device_get_devpath(device_parent)); | |
121 | printf(" KERNELS==\"%s\"\n", udev_device_get_sysname(device_parent)); | |
122 | str = udev_device_get_subsystem(device_parent); | |
123 | if (str == NULL) | |
124 | str = ""; | |
125 | printf(" SUBSYSTEMS==\"%s\"\n", str); | |
126 | str = udev_device_get_driver(device_parent); | |
127 | if (str == NULL) | |
128 | str = ""; | |
129 | printf(" DRIVERS==\"%s\"\n", str); | |
130 | print_all_attributes(device_parent, "ATTRS"); | |
131 | } while (device_parent != NULL); | |
132 | ||
133 | return 0; | |
134 | } | |
135 | ||
136 | static void print_record(struct udev_device *device) | |
137 | { | |
138 | size_t len; | |
139 | const char *str; | |
140 | int i; | |
141 | struct udev_list_entry *list_entry; | |
142 | ||
143 | printf("P: %s\n", udev_device_get_devpath(device)); | |
144 | ||
145 | len = strlen(udev_get_dev_path(udev_device_get_udev(device))); | |
146 | str = udev_device_get_devnode(device); | |
147 | if (str != NULL) | |
148 | printf("N: %s\n", &str[len+1]); | |
149 | ||
150 | i = udev_device_get_devlink_priority(device); | |
151 | if (i != 0) | |
152 | printf("L: %i\n", i); | |
153 | ||
154 | udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(device)) { | |
155 | len = strlen(udev_get_dev_path(udev_device_get_udev(device))); | |
156 | printf("S: %s\n", &udev_list_entry_get_name(list_entry)[len+1]); | |
157 | } | |
158 | ||
159 | udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(device)) | |
160 | printf("E: %s=%s\n", | |
161 | udev_list_entry_get_name(list_entry), | |
162 | udev_list_entry_get_value(list_entry)); | |
163 | printf("\n"); | |
164 | } | |
165 | ||
166 | static int stat_device(const char *name, bool export, const char *prefix) | |
167 | { | |
168 | struct stat statbuf; | |
169 | ||
170 | if (stat(name, &statbuf) != 0) | |
171 | return -1; | |
172 | ||
173 | if (export) { | |
174 | if (prefix == NULL) | |
175 | prefix = "INFO_"; | |
176 | printf("%sMAJOR=%d\n" | |
177 | "%sMINOR=%d\n", | |
178 | prefix, major(statbuf.st_dev), | |
179 | prefix, minor(statbuf.st_dev)); | |
180 | } else | |
181 | printf("%d:%d\n", major(statbuf.st_dev), minor(statbuf.st_dev)); | |
182 | return 0; | |
183 | } | |
184 | ||
185 | static int export_devices(struct udev *udev) | |
186 | { | |
187 | struct udev_enumerate *udev_enumerate; | |
188 | struct udev_list_entry *list_entry; | |
189 | ||
190 | udev_enumerate = udev_enumerate_new(udev); | |
191 | if (udev_enumerate == NULL) | |
192 | return -1; | |
193 | udev_enumerate_scan_devices(udev_enumerate); | |
194 | udev_list_entry_foreach(list_entry, udev_enumerate_get_list_entry(udev_enumerate)) { | |
195 | struct udev_device *device; | |
196 | ||
197 | device = udev_device_new_from_syspath(udev, udev_list_entry_get_name(list_entry)); | |
198 | if (device != NULL) { | |
199 | print_record(device); | |
200 | udev_device_unref(device); | |
201 | } | |
202 | } | |
203 | udev_enumerate_unref(udev_enumerate); | |
204 | return 0; | |
205 | } | |
206 | ||
207 | static void cleanup_dir(DIR *dir, mode_t mask, int depth) | |
208 | { | |
209 | struct dirent *dent; | |
210 | ||
211 | if (depth <= 0) | |
212 | return; | |
213 | ||
214 | for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) { | |
215 | struct stat stats; | |
216 | ||
217 | if (dent->d_name[0] == '.') | |
218 | continue; | |
219 | if (fstatat(dirfd(dir), dent->d_name, &stats, AT_SYMLINK_NOFOLLOW) != 0) | |
220 | continue; | |
221 | if ((stats.st_mode & mask) != 0) | |
222 | continue; | |
223 | if (S_ISDIR(stats.st_mode)) { | |
224 | DIR *dir2; | |
225 | ||
226 | dir2 = fdopendir(openat(dirfd(dir), dent->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC)); | |
227 | if (dir2 != NULL) { | |
228 | cleanup_dir(dir2, mask, depth-1); | |
229 | closedir(dir2); | |
230 | } | |
231 | unlinkat(dirfd(dir), dent->d_name, AT_REMOVEDIR); | |
232 | } else { | |
233 | unlinkat(dirfd(dir), dent->d_name, 0); | |
234 | } | |
235 | } | |
236 | } | |
237 | ||
238 | static void cleanup_db(struct udev *udev) | |
239 | { | |
240 | char filename[UTIL_PATH_SIZE]; | |
241 | DIR *dir; | |
242 | ||
243 | util_strscpyl(filename, sizeof(filename), udev_get_run_path(udev), "/queue.bin", NULL); | |
244 | unlink(filename); | |
245 | ||
246 | util_strscpyl(filename, sizeof(filename), udev_get_run_path(udev), "/data", NULL); | |
247 | dir = opendir(filename); | |
248 | if (dir != NULL) { | |
249 | cleanup_dir(dir, S_ISVTX, 1); | |
250 | closedir(dir); | |
251 | } | |
252 | ||
253 | util_strscpyl(filename, sizeof(filename), udev_get_run_path(udev), "/links", NULL); | |
254 | dir = opendir(filename); | |
255 | if (dir != NULL) { | |
256 | cleanup_dir(dir, 0, 2); | |
257 | closedir(dir); | |
258 | } | |
259 | ||
260 | util_strscpyl(filename, sizeof(filename), udev_get_run_path(udev), "/tags", NULL); | |
261 | dir = opendir(filename); | |
262 | if (dir != NULL) { | |
263 | cleanup_dir(dir, 0, 2); | |
264 | closedir(dir); | |
265 | } | |
266 | ||
267 | util_strscpyl(filename, sizeof(filename), udev_get_run_path(udev), "/watch", NULL); | |
268 | dir = opendir(filename); | |
269 | if (dir != NULL) { | |
270 | cleanup_dir(dir, 0, 1); | |
271 | closedir(dir); | |
272 | } | |
273 | ||
274 | util_strscpyl(filename, sizeof(filename), udev_get_run_path(udev), "/firmware-missing", NULL); | |
275 | dir = opendir(filename); | |
276 | if (dir != NULL) { | |
277 | cleanup_dir(dir, 0, 1); | |
278 | closedir(dir); | |
279 | } | |
280 | } | |
281 | ||
282 | static int uinfo(struct udev *udev, int argc, char *argv[]) | |
283 | { | |
284 | struct udev_device *device = NULL; | |
285 | bool root = 0; | |
286 | bool export = 0; | |
287 | const char *export_prefix = NULL; | |
288 | char path[UTIL_PATH_SIZE]; | |
289 | char name[UTIL_PATH_SIZE]; | |
290 | struct udev_list_entry *list_entry; | |
291 | int rc = 0; | |
292 | ||
293 | static const struct option options[] = { | |
294 | { "name", required_argument, NULL, 'n' }, | |
295 | { "path", required_argument, NULL, 'p' }, | |
296 | { "query", required_argument, NULL, 'q' }, | |
297 | { "attribute-walk", no_argument, NULL, 'a' }, | |
298 | { "cleanup-db", no_argument, NULL, 'c' }, | |
299 | { "export-db", no_argument, NULL, 'e' }, | |
300 | { "root", no_argument, NULL, 'r' }, | |
301 | { "run", no_argument, NULL, 'R' }, | |
302 | { "device-id-of-file", required_argument, NULL, 'd' }, | |
303 | { "export", no_argument, NULL, 'x' }, | |
304 | { "export-prefix", required_argument, NULL, 'P' }, | |
305 | { "version", no_argument, NULL, 'V' }, | |
306 | { "help", no_argument, NULL, 'h' }, | |
307 | {} | |
308 | }; | |
309 | ||
310 | enum action_type { | |
311 | ACTION_NONE, | |
312 | ACTION_QUERY, | |
313 | ACTION_ATTRIBUTE_WALK, | |
314 | ACTION_ROOT, | |
315 | ACTION_DEVICE_ID_FILE, | |
316 | } action = ACTION_NONE; | |
317 | ||
318 | enum query_type { | |
319 | QUERY_NONE, | |
320 | QUERY_NAME, | |
321 | QUERY_PATH, | |
322 | QUERY_SYMLINK, | |
323 | QUERY_PROPERTY, | |
324 | QUERY_ALL, | |
325 | } query = QUERY_NONE; | |
326 | ||
327 | for (;;) { | |
328 | int option; | |
329 | struct stat statbuf; | |
330 | ||
331 | option = getopt_long(argc, argv, "aced:n:p:q:rxP:RVh", options, NULL); | |
332 | if (option == -1) | |
333 | break; | |
334 | ||
335 | dbg(udev, "option '%c'\n", option); | |
336 | switch (option) { | |
337 | case 'n': | |
338 | if (device != NULL) { | |
339 | fprintf(stderr, "device already specified\n"); | |
340 | rc = 2; | |
341 | goto exit; | |
342 | } | |
343 | /* remove /dev if given */ | |
344 | if (strncmp(optarg, udev_get_dev_path(udev), strlen(udev_get_dev_path(udev))) != 0) | |
345 | util_strscpyl(name, sizeof(name), udev_get_dev_path(udev), "/", optarg, NULL); | |
346 | else | |
347 | util_strscpy(name, sizeof(name), optarg); | |
348 | util_remove_trailing_chars(name, '/'); | |
349 | if (stat(name, &statbuf) < 0) { | |
350 | fprintf(stderr, "device node not found\n"); | |
351 | rc = 2; | |
352 | goto exit; | |
353 | } else { | |
354 | char type; | |
355 | ||
356 | if (S_ISBLK(statbuf.st_mode)) { | |
357 | type = 'b'; | |
358 | } else if (S_ISCHR(statbuf.st_mode)) { | |
359 | type = 'c'; | |
360 | } else { | |
361 | fprintf(stderr, "device node has wrong file type\n"); | |
362 | rc = 2; | |
363 | goto exit; | |
364 | } | |
365 | device = udev_device_new_from_devnum(udev, type, statbuf.st_rdev); | |
366 | if (device == NULL) { | |
367 | fprintf(stderr, "device node not found\n"); | |
368 | rc = 2; | |
369 | goto exit; | |
370 | } | |
371 | } | |
372 | break; | |
373 | case 'p': | |
374 | if (device != NULL) { | |
375 | fprintf(stderr, "device already specified\n"); | |
376 | rc = 2; | |
377 | goto exit; | |
378 | } | |
379 | /* add sys dir if needed */ | |
380 | if (strncmp(optarg, udev_get_sys_path(udev), strlen(udev_get_sys_path(udev))) != 0) | |
381 | util_strscpyl(path, sizeof(path), udev_get_sys_path(udev), optarg, NULL); | |
382 | else | |
383 | util_strscpy(path, sizeof(path), optarg); | |
384 | util_remove_trailing_chars(path, '/'); | |
385 | device = udev_device_new_from_syspath(udev, path); | |
386 | if (device == NULL) { | |
387 | fprintf(stderr, "device path not found\n"); | |
388 | rc = 2; | |
389 | goto exit; | |
390 | } | |
391 | break; | |
392 | case 'q': | |
393 | action = ACTION_QUERY; | |
394 | if (strcmp(optarg, "property") == 0 || strcmp(optarg, "env") == 0) { | |
395 | query = QUERY_PROPERTY; | |
396 | } else if (strcmp(optarg, "name") == 0) { | |
397 | query = QUERY_NAME; | |
398 | } else if (strcmp(optarg, "symlink") == 0) { | |
399 | query = QUERY_SYMLINK; | |
400 | } else if (strcmp(optarg, "path") == 0) { | |
401 | query = QUERY_PATH; | |
402 | } else if (strcmp(optarg, "all") == 0) { | |
403 | query = QUERY_ALL; | |
404 | } else { | |
405 | fprintf(stderr, "unknown query type\n"); | |
406 | rc = 3; | |
407 | goto exit; | |
408 | } | |
409 | break; | |
410 | case 'r': | |
411 | if (action == ACTION_NONE) | |
412 | action = ACTION_ROOT; | |
413 | root = true; | |
414 | break; | |
415 | case 'R': | |
416 | printf("%s\n", udev_get_run_path(udev)); | |
417 | goto exit; | |
418 | case 'd': | |
419 | action = ACTION_DEVICE_ID_FILE; | |
420 | util_strscpy(name, sizeof(name), optarg); | |
421 | break; | |
422 | case 'a': | |
423 | action = ACTION_ATTRIBUTE_WALK; | |
424 | break; | |
425 | case 'e': | |
426 | export_devices(udev); | |
427 | goto exit; | |
428 | case 'c': | |
429 | cleanup_db(udev); | |
430 | goto exit; | |
431 | case 'x': | |
432 | export = true; | |
433 | break; | |
434 | case 'P': | |
435 | export_prefix = optarg; | |
436 | break; | |
437 | case 'V': | |
438 | printf("%s\n", VERSION); | |
439 | goto exit; | |
440 | case 'h': | |
441 | printf("Usage: udevadm info OPTIONS\n" | |
442 | " --query=<type> query device information:\n" | |
443 | " name name of device node\n" | |
444 | " symlink pointing to node\n" | |
445 | " path sys device path\n" | |
446 | " property the device properties\n" | |
447 | " all all values\n" | |
448 | " --path=<syspath> sys device path used for query or attribute walk\n" | |
449 | " --name=<name> node or symlink name used for query or attribute walk\n" | |
450 | " --root prepend dev directory to path names\n" | |
451 | " --attribute-walk print all key matches while walking along the chain\n" | |
452 | " of parent devices\n" | |
453 | " --device-id-of-file=<file> print major:minor of device containing this file\n" | |
454 | " --export export key/value pairs\n" | |
455 | " --export-prefix export the key name with a prefix\n" | |
456 | " --export-db export the content of the udev database\n" | |
457 | " --cleanup-db cleanup the udev database\n" | |
458 | " --help\n\n"); | |
459 | goto exit; | |
460 | default: | |
461 | rc = 1; | |
462 | goto exit; | |
463 | } | |
464 | } | |
465 | ||
466 | switch (action) { | |
467 | case ACTION_QUERY: | |
468 | if (device == NULL) { | |
469 | fprintf(stderr, "query needs a valid device specified by --path= or --name=\n"); | |
470 | rc = 4; | |
471 | goto exit; | |
472 | } | |
473 | ||
474 | switch(query) { | |
475 | case QUERY_NAME: { | |
476 | const char *node = udev_device_get_devnode(device); | |
477 | ||
478 | if (node == NULL) { | |
479 | fprintf(stderr, "no device node found\n"); | |
480 | rc = 5; | |
481 | goto exit; | |
482 | } | |
483 | ||
484 | if (root) { | |
485 | printf("%s\n", udev_device_get_devnode(device)); | |
486 | } else { | |
487 | size_t len = strlen(udev_get_dev_path(udev)); | |
488 | ||
489 | printf("%s\n", &udev_device_get_devnode(device)[len+1]); | |
490 | } | |
491 | break; | |
492 | } | |
493 | case QUERY_SYMLINK: | |
494 | list_entry = udev_device_get_devlinks_list_entry(device); | |
495 | while (list_entry != NULL) { | |
496 | if (root) { | |
497 | printf("%s", udev_list_entry_get_name(list_entry)); | |
498 | } else { | |
499 | size_t len; | |
500 | ||
501 | len = strlen(udev_get_dev_path(udev_device_get_udev(device))); | |
502 | printf("%s", &udev_list_entry_get_name(list_entry)[len+1]); | |
503 | } | |
504 | list_entry = udev_list_entry_get_next(list_entry); | |
505 | if (list_entry != NULL) | |
506 | printf(" "); | |
507 | } | |
508 | printf("\n"); | |
509 | break; | |
510 | case QUERY_PATH: | |
511 | printf("%s\n", udev_device_get_devpath(device)); | |
512 | goto exit; | |
513 | case QUERY_PROPERTY: | |
514 | list_entry = udev_device_get_properties_list_entry(device); | |
515 | while (list_entry != NULL) { | |
516 | if (export) { | |
517 | const char *prefix = export_prefix; | |
518 | ||
519 | if (prefix == NULL) | |
520 | prefix = ""; | |
521 | printf("%s%s='%s'\n", prefix, | |
522 | udev_list_entry_get_name(list_entry), | |
523 | udev_list_entry_get_value(list_entry)); | |
524 | } else { | |
525 | printf("%s=%s\n", udev_list_entry_get_name(list_entry), udev_list_entry_get_value(list_entry)); | |
526 | } | |
527 | list_entry = udev_list_entry_get_next(list_entry); | |
528 | } | |
529 | break; | |
530 | case QUERY_ALL: | |
531 | print_record(device); | |
532 | break; | |
533 | default: | |
534 | fprintf(stderr, "unknown query type\n"); | |
535 | break; | |
536 | } | |
537 | break; | |
538 | case ACTION_ATTRIBUTE_WALK: | |
539 | if (device == NULL) { | |
540 | fprintf(stderr, "query needs a valid device specified by --path= or --name=\n"); | |
541 | rc = 4; | |
542 | goto exit; | |
543 | } | |
544 | print_device_chain(device); | |
545 | break; | |
546 | case ACTION_DEVICE_ID_FILE: | |
547 | if (stat_device(name, export, export_prefix) != 0) | |
548 | rc = 1; | |
549 | break; | |
550 | case ACTION_ROOT: | |
551 | printf("%s\n", udev_get_dev_path(udev)); | |
552 | break; | |
553 | default: | |
554 | fprintf(stderr, "missing option\n"); | |
555 | rc = 1; | |
556 | break; | |
557 | } | |
558 | ||
559 | exit: | |
560 | udev_device_unref(device); | |
561 | return rc; | |
562 | } | |
563 | ||
564 | const struct udevadm_cmd udevadm_info = { | |
565 | .name = "info", | |
566 | .cmd = uinfo, | |
567 | .help = "query sysfs or the udev database", | |
568 | }; |