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be9b51f6 KS |
1 | /* |
2 | * udevinfo - fetches attributes for a device | |
3 | * | |
4 | * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org> | |
5 | * | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify it | |
8 | * under the terms of the GNU General Public License as published by the | |
9 | * Free Software Foundation version 2 of the License. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License along | |
17 | * with this program; if not, write to the Free Software Foundation, Inc., | |
18 | * 675 Mass Ave, Cambridge, MA 02139, USA. | |
19 | * | |
20 | */ | |
21 | ||
22 | #include <stdlib.h> | |
23 | #include <string.h> | |
24 | #include <stdio.h> | |
034f35d7 | 25 | #include <ctype.h> |
87171e46 KS |
26 | #include <stdarg.h> |
27 | #include <unistd.h> | |
28 | #include <errno.h> | |
be9b51f6 | 29 | |
869fc2f1 GKH |
30 | #include "udev.h" |
31 | #include "udev_version.h" | |
32 | #include "logging.h" | |
33 | #include "udevdb.h" | |
34 | #include "libsysfs/libsysfs.h" | |
be9b51f6 KS |
35 | |
36 | ||
87171e46 | 37 | # define SYSFS_VALUE_MAX 200 |
be9b51f6 KS |
38 | |
39 | char **main_argv; | |
87171e46 | 40 | int main_argc; |
be9b51f6 | 41 | |
87171e46 | 42 | static int print_all_attributes(const char *path) |
be9b51f6 KS |
43 | { |
44 | struct dlist *attributes; | |
45 | struct sysfs_attribute *attr; | |
46 | struct sysfs_directory *sysfs_dir; | |
87171e46 | 47 | char value[SYSFS_VALUE_MAX]; |
be9b51f6 KS |
48 | int len; |
49 | int retval = 0; | |
50 | ||
51 | sysfs_dir = sysfs_open_directory(path); | |
52 | if (sysfs_dir == NULL) | |
53 | return -1; | |
54 | ||
55 | attributes = sysfs_get_dir_attributes(sysfs_dir); | |
56 | if (attributes == NULL) { | |
57 | retval = -1; | |
58 | goto exit; | |
59 | } | |
60 | ||
61 | dlist_for_each_data(attributes, attr, struct sysfs_attribute) { | |
62 | if (attr->value != NULL) { | |
87171e46 | 63 | strncpy(value, attr->value, SYSFS_VALUE_MAX); |
be9b51f6 | 64 | len = strlen(value); |
034f35d7 KS |
65 | if (len == 0) |
66 | continue; | |
67 | ||
68 | /* remove trailing newline */ | |
69 | if (value[len-1] == '\n') { | |
be9b51f6 | 70 | value[len-1] = '\0'; |
034f35d7 KS |
71 | len--; |
72 | } | |
73 | ||
74 | /* skip nonprintable values */ | |
75 | while (len) { | |
76 | if (isprint(value[len-1]) == 0) | |
77 | break; | |
78 | len--; | |
79 | } | |
80 | if (len == 0) | |
81 | printf(" SYSFS_%s=\"%s\"\n", attr->name, value); | |
be9b51f6 KS |
82 | } |
83 | } | |
84 | printf("\n"); | |
85 | ||
86 | exit: | |
87 | sysfs_close_directory(sysfs_dir); | |
88 | ||
89 | return retval; | |
90 | } | |
91 | ||
87171e46 KS |
92 | /* callback for database dump */ |
93 | static int print_record(char *path, struct udevice *dev) | |
94 | { | |
95 | printf("P: %s\n", path); | |
96 | printf("N: %s\n", dev->name); | |
97 | printf("M: %#o\n", dev->mode); | |
98 | printf("S: %s\n", dev->symlink); | |
99 | printf("O: %s\n", dev->owner); | |
100 | printf("G: %s\n", dev->group); | |
101 | printf("\n"); | |
102 | return 0; | |
103 | } | |
104 | ||
105 | enum query_type { | |
106 | NONE, | |
107 | NAME, | |
108 | PATH, | |
109 | SYMLINK, | |
110 | MODE, | |
111 | OWNER, | |
112 | GROUP | |
113 | }; | |
114 | ||
115 | static int print_device_chain(const char *path) | |
be9b51f6 | 116 | { |
be9b51f6 KS |
117 | struct sysfs_class_device *class_dev; |
118 | struct sysfs_class_device *class_dev_parent; | |
119 | struct sysfs_attribute *attr; | |
034f35d7 KS |
120 | struct sysfs_device *sysfs_dev; |
121 | struct sysfs_device *sysfs_dev_parent; | |
be9b51f6 KS |
122 | int retval = 0; |
123 | ||
be9b51f6 KS |
124 | /* get the class dev */ |
125 | class_dev = sysfs_open_class_device_path(path); | |
126 | if (class_dev == NULL) { | |
127 | printf("couldn't get the class device\n"); | |
128 | return -1; | |
129 | } | |
130 | ||
131 | /* read the 'dev' file for major/minor*/ | |
132 | attr = sysfs_get_classdev_attr(class_dev, "dev"); | |
133 | if (attr == NULL) { | |
134 | printf("couldn't get the \"dev\" file\n"); | |
135 | retval = -1; | |
136 | goto exit; | |
137 | } | |
034f35d7 | 138 | printf("\ndevice '%s' has major:minor %s", class_dev->path, attr->value); |
be9b51f6 KS |
139 | sysfs_close_attribute(attr); |
140 | ||
141 | /* open sysfs class device directory and print all attributes */ | |
034f35d7 | 142 | printf(" looking at class device '%s':\n", class_dev->path); |
be9b51f6 KS |
143 | if (print_all_attributes(class_dev->path) != 0) { |
144 | printf("couldn't open class device directory\n"); | |
145 | retval = -1; | |
146 | goto exit; | |
147 | } | |
148 | ||
034f35d7 | 149 | /* get the device link (if parent exists look here) */ |
be9b51f6 KS |
150 | class_dev_parent = sysfs_get_classdev_parent(class_dev); |
151 | if (class_dev_parent != NULL) { | |
152 | //sysfs_close_class_device(class_dev); | |
153 | class_dev = class_dev_parent; | |
154 | } | |
034f35d7 KS |
155 | sysfs_dev = sysfs_get_classdev_device(class_dev); |
156 | if (sysfs_dev != NULL) | |
157 | printf("follow the class device's \"device\"\n"); | |
158 | ||
159 | /* look the device chain upwards */ | |
160 | while (sysfs_dev != NULL) { | |
161 | printf(" looking at the device chain at '%s':\n", sysfs_dev->path); | |
162 | printf(" BUS=\"%s\"\n", sysfs_dev->bus); | |
163 | printf(" ID=\"%s\"\n", sysfs_dev->bus_id); | |
be9b51f6 KS |
164 | |
165 | /* open sysfs device directory and print all attributes */ | |
034f35d7 KS |
166 | print_all_attributes(sysfs_dev->path); |
167 | ||
168 | sysfs_dev_parent = sysfs_get_device_parent(sysfs_dev); | |
169 | if (sysfs_dev_parent == NULL) | |
170 | break; | |
171 | ||
172 | //sysfs_close_device(sysfs_dev); | |
173 | sysfs_dev = sysfs_dev_parent; | |
be9b51f6 | 174 | } |
034f35d7 | 175 | sysfs_close_device(sysfs_dev); |
be9b51f6 KS |
176 | |
177 | exit: | |
178 | //sysfs_close_class_device(class_dev); | |
179 | return retval; | |
180 | } | |
87171e46 KS |
181 | |
182 | static int process_options(void) | |
183 | { | |
184 | static const char short_options[] = "adn:p:q:rVh"; | |
185 | int option; | |
186 | int retval = 1; | |
187 | struct udevice dev; | |
188 | int root = 0; | |
189 | int attributes = 0; | |
190 | enum query_type query = NONE; | |
191 | char result[NAME_SIZE] = ""; | |
192 | char path[NAME_SIZE] = ""; | |
193 | char name[NAME_SIZE] = ""; | |
194 | char temp[NAME_SIZE]; | |
195 | char *pos; | |
196 | ||
197 | /* get command line options */ | |
198 | while (1) { | |
199 | option = getopt(main_argc, main_argv, short_options); | |
200 | if (option == -1) | |
201 | break; | |
202 | ||
203 | dbg("option '%c'", option); | |
204 | switch (option) { | |
205 | case 'n': | |
206 | dbg("udev name: %s\n", optarg); | |
207 | strfieldcpy(name, optarg); | |
208 | break; | |
209 | ||
210 | case 'p': | |
211 | dbg("udev path: %s\n", optarg); | |
212 | strfieldcpy(path, optarg); | |
213 | break; | |
214 | ||
215 | case 'q': | |
216 | dbg("udev query: %s\n", optarg); | |
217 | ||
218 | if (strcmp(optarg, "name") == 0) { | |
219 | query = NAME; | |
220 | break; | |
221 | } | |
222 | ||
223 | if (strcmp(optarg, "symlink") == 0) { | |
224 | query = SYMLINK; | |
225 | break; | |
226 | } | |
227 | ||
228 | if (strcmp(optarg, "mode") == 0) { | |
229 | query = MODE; | |
230 | break; | |
231 | } | |
232 | ||
233 | if (strcmp(optarg, "owner") == 0) { | |
234 | query = OWNER; | |
235 | break; | |
236 | } | |
237 | ||
238 | if (strcmp(optarg, "group") == 0) { | |
239 | query = GROUP; | |
240 | break; | |
241 | } | |
242 | ||
243 | if (strcmp(optarg, "path") == 0) { | |
244 | query = PATH; | |
245 | break; | |
246 | } | |
247 | ||
248 | printf("unknown query type\n"); | |
249 | exit(1); | |
250 | ||
251 | case 'r': | |
252 | root = 1; | |
253 | break; | |
254 | ||
255 | case 'a': | |
256 | attributes = 1; | |
257 | break; | |
258 | ||
259 | case 'd': | |
260 | retval = udevdb_open_ro(); | |
261 | if (retval != 0) { | |
262 | printf("unable to open udev database\n"); | |
263 | exit(2); | |
264 | } | |
265 | udevdb_call_foreach(print_record); | |
266 | udevdb_exit(); | |
267 | exit(0); | |
268 | ||
269 | case 'V': | |
869fc2f1 | 270 | printf("udevinfo, version %s\n", UDEV_VERSION); |
87171e46 KS |
271 | exit(0); |
272 | ||
273 | case 'h': | |
274 | retval = 0; | |
275 | case '?': | |
276 | default: | |
277 | goto help; | |
278 | } | |
279 | } | |
280 | ||
281 | /* process options */ | |
282 | if (query != NONE) { | |
283 | retval = udevdb_open_ro(); | |
284 | if (retval != 0) { | |
285 | printf("unable to open udev database\n"); | |
286 | return -EACCES; | |
287 | } | |
288 | ||
289 | if (path[0] != '\0') { | |
290 | /* remove sysfs_path if given */ | |
291 | if (strncmp(path, sysfs_path, strlen(sysfs_path)) == 0) { | |
292 | pos = path + strlen(sysfs_path); | |
293 | } else { | |
294 | if (path[0] != '/') { | |
295 | /* prepend '/' if missing */ | |
296 | strcat(temp, "/"); | |
297 | strncat(temp, path, sizeof(path)); | |
298 | pos = temp; | |
299 | } else { | |
300 | pos = path; | |
301 | } | |
302 | } | |
303 | retval = udevdb_get_dev(pos, &dev); | |
304 | if (retval != 0) { | |
305 | printf("device not found in database\n"); | |
306 | goto exit; | |
307 | } | |
308 | goto print; | |
309 | } | |
310 | ||
311 | if (name[0] != '\0') { | |
312 | /* remove udev_root if given */ | |
313 | if (strncmp(name, udev_root, strlen(udev_root)) == 0) { | |
314 | pos = name + strlen(udev_root); | |
315 | } else | |
316 | pos = name; | |
317 | retval = udevdb_get_dev_byname(pos, path, &dev); | |
318 | if (retval != 0) { | |
319 | printf("device not found in database\n"); | |
320 | goto exit; | |
321 | } | |
322 | goto print; | |
323 | } | |
324 | ||
325 | printf("query needs device path(-p) or node name(-n) specified\n"); | |
326 | goto exit; | |
327 | ||
328 | print: | |
329 | switch(query) { | |
330 | case NAME: | |
331 | if (root) | |
332 | strfieldcpy(result, udev_root); | |
333 | strncat(result, dev.name, sizeof(result)); | |
334 | break; | |
335 | ||
336 | case SYMLINK: | |
337 | strfieldcpy(result, dev.symlink); | |
338 | break; | |
339 | ||
340 | case MODE: | |
341 | sprintf(result, "%#o", dev.mode); | |
342 | break; | |
343 | ||
344 | case GROUP: | |
345 | strfieldcpy(result, dev.group); | |
346 | break; | |
347 | ||
348 | case OWNER: | |
349 | strfieldcpy(result, dev.owner); | |
350 | break; | |
351 | ||
352 | case PATH: | |
353 | strfieldcpy(result, path); | |
354 | break; | |
355 | ||
356 | default: | |
357 | goto exit; | |
358 | } | |
359 | printf("%s\n", result); | |
360 | ||
361 | exit: | |
362 | udevdb_exit(); | |
363 | return retval; | |
364 | } | |
365 | ||
366 | if (attributes) { | |
367 | if (path[0] == '\0') { | |
368 | printf("attribute walk on device chain needs path(-p) specified\n"); | |
369 | return -EINVAL; | |
370 | } else { | |
371 | if (strncmp(path, sysfs_path, strlen(sysfs_path)) != 0) { | |
372 | /* prepend sysfs mountpoint if not given */ | |
373 | strfieldcpy(temp, path); | |
374 | strfieldcpy(path, sysfs_path); | |
375 | strncat(path, temp, sizeof(path)); | |
376 | } | |
377 | print_device_chain(path); | |
378 | return 0; | |
379 | } | |
380 | } | |
381 | ||
382 | if (root) { | |
383 | printf("%s\n", udev_root); | |
384 | return 0; | |
385 | } | |
386 | ||
387 | help: | |
388 | printf("Usage: [-anpqrdVh]\n" | |
389 | " -q TYPE query database for the specified value:\n" | |
390 | " 'name' name of device node\n" | |
391 | " 'symlink' pointing to node\n" | |
392 | " 'mode' permissions of node\n" | |
393 | " 'owner' of node\n" | |
394 | " 'group' of node\n" | |
395 | " 'path' sysfs device path\n" | |
396 | " -p PATH sysfs device path used for query or chain\n" | |
397 | " -n NAME node name used for query\n" | |
398 | "\n" | |
399 | " -r print udev root\n" | |
400 | " -a print all attributes along the chain of the device\n" | |
401 | " -d dump whole database\n" | |
402 | " -V print udev version\n" | |
403 | " -h print this help text\n" | |
404 | "\n"); | |
405 | return retval; | |
406 | } | |
407 | ||
408 | int main(int argc, char *argv[], char *envp[]) | |
409 | { | |
410 | int retval; | |
411 | ||
412 | main_argv = argv; | |
413 | main_argc = argc; | |
87171e46 KS |
414 | |
415 | /* initialize our configuration */ | |
416 | udev_init_config(); | |
417 | ||
418 | retval = process_options(); | |
419 | if (retval != 0) | |
420 | exit(1); | |
421 | exit(0); | |
422 | } |