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Commit | Line | Data |
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0cc3ccfd GSB |
1 | /* |
2 | * kmod-modinfo - query kernel module information using libkmod. | |
3 | * | |
e6b0e49b | 4 | * Copyright (C) 2011-2013 ProFUSION embedded systems |
0cc3ccfd GSB |
5 | * |
6 | * This program is free software: you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation, either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
c2e4286b LDM |
20 | #include <errno.h> |
21 | #include <getopt.h> | |
22 | #include <limits.h> | |
23 | #include <stdbool.h> | |
0cc3ccfd GSB |
24 | #include <stdio.h> |
25 | #include <stdlib.h> | |
0cc3ccfd | 26 | #include <string.h> |
0cc3ccfd | 27 | #include <sys/stat.h> |
c2e4286b LDM |
28 | #include <sys/utsname.h> |
29 | ||
f4e8c162 LDM |
30 | #include <shared/util.h> |
31 | ||
f357866d | 32 | #include <libkmod/libkmod.h> |
0cc3ccfd | 33 | |
4a2e20df LDM |
34 | #include "kmod.h" |
35 | ||
0cc3ccfd GSB |
36 | static char separator = '\n'; |
37 | static const char *field = NULL; | |
38 | ||
39 | struct param { | |
40 | struct param *next; | |
41 | const char *name; | |
42 | const char *param; | |
43 | const char *type; | |
44 | int namelen; | |
45 | int paramlen; | |
46 | int typelen; | |
47 | }; | |
48 | ||
49 | static struct param *add_param(const char *name, int namelen, const char *param, int paramlen, const char *type, int typelen, struct param **list) | |
50 | { | |
51 | struct param *it; | |
52 | ||
53 | for (it = *list; it != NULL; it = it->next) { | |
54 | if (it->namelen == namelen && | |
55 | memcmp(it->name, name, namelen) == 0) | |
56 | break; | |
57 | } | |
58 | ||
59 | if (it == NULL) { | |
60 | it = malloc(sizeof(struct param)); | |
61 | if (it == NULL) | |
62 | return NULL; | |
63 | it->next = *list; | |
64 | *list = it; | |
65 | it->name = name; | |
66 | it->namelen = namelen; | |
67 | it->param = NULL; | |
68 | it->type = NULL; | |
69 | it->paramlen = 0; | |
70 | it->typelen = 0; | |
71 | } | |
72 | ||
73 | if (param != NULL) { | |
74 | it->param = param; | |
75 | it->paramlen = paramlen; | |
76 | } | |
77 | ||
78 | if (type != NULL) { | |
79 | it->type = type; | |
80 | it->typelen = typelen; | |
81 | } | |
82 | ||
83 | return it; | |
84 | } | |
85 | ||
b014c490 GSB |
86 | static int process_parm(const char *key, const char *value, struct param **params) |
87 | { | |
88 | const char *name, *param, *type; | |
89 | int namelen, paramlen, typelen; | |
90 | struct param *it; | |
91 | const char *colon = strchr(value, ':'); | |
92 | if (colon == NULL) { | |
9382dbf7 | 93 | ERR("Found invalid \"%s=%s\": missing ':'\n", |
b014c490 GSB |
94 | key, value); |
95 | return 0; | |
96 | } | |
97 | ||
98 | name = value; | |
99 | namelen = colon - value; | |
5b0436a7 | 100 | if (streq(key, "parm")) { |
b014c490 GSB |
101 | param = colon + 1; |
102 | paramlen = strlen(param); | |
103 | type = NULL; | |
104 | typelen = 0; | |
105 | } else { | |
106 | param = NULL; | |
107 | paramlen = 0; | |
108 | type = colon + 1; | |
109 | typelen = strlen(type); | |
110 | } | |
111 | ||
112 | it = add_param(name, namelen, param, paramlen, type, typelen, params); | |
113 | if (it == NULL) { | |
9382dbf7 | 114 | ERR("Out of memory!\n"); |
b014c490 GSB |
115 | return -ENOMEM; |
116 | } | |
117 | ||
118 | return 0; | |
119 | } | |
120 | ||
121 | static int modinfo_params_do(const struct kmod_list *list) | |
122 | { | |
123 | const struct kmod_list *l; | |
124 | struct param *params = NULL; | |
125 | int err = 0; | |
126 | ||
127 | kmod_list_foreach(l, list) { | |
128 | const char *key = kmod_module_info_get_key(l); | |
129 | const char *value = kmod_module_info_get_value(l); | |
5b0436a7 | 130 | if (!streq(key, "parm") && !streq(key, "parmtype")) |
b014c490 GSB |
131 | continue; |
132 | ||
133 | err = process_parm(key, value, ¶ms); | |
134 | if (err < 0) | |
135 | goto end; | |
136 | } | |
137 | ||
138 | while (params != NULL) { | |
139 | struct param *p = params; | |
140 | params = p->next; | |
141 | ||
142 | if (p->param == NULL) | |
143 | printf("%.*s: (%.*s)%c", | |
144 | p->namelen, p->name, p->typelen, p->type, | |
145 | separator); | |
146 | else if (p->type != NULL) | |
147 | printf("%.*s:%.*s (%.*s)%c", | |
148 | p->namelen, p->name, | |
149 | p->paramlen, p->param, | |
150 | p->typelen, p->type, | |
151 | separator); | |
152 | else | |
153 | printf("%.*s:%.*s%c", | |
154 | p->namelen, p->name, | |
155 | p->paramlen, p->param, | |
156 | separator); | |
157 | ||
158 | free(p); | |
159 | } | |
160 | ||
161 | end: | |
162 | while (params != NULL) { | |
163 | void *tmp = params; | |
164 | params = params->next; | |
165 | free(tmp); | |
166 | } | |
167 | ||
168 | return err; | |
169 | } | |
170 | ||
0cc3ccfd GSB |
171 | static int modinfo_do(struct kmod_module *mod) |
172 | { | |
173 | struct kmod_list *l, *list = NULL; | |
174 | struct param *params = NULL; | |
e7e2cb61 AG |
175 | int err, is_builtin; |
176 | const char *filename = kmod_module_get_path(mod); | |
177 | ||
178 | is_builtin = (filename == NULL); | |
179 | ||
180 | if (is_builtin) { | |
fa67110f MI |
181 | if (field == NULL) |
182 | printf("%-16s%s%c", "name:", | |
183 | kmod_module_get_name(mod), separator); | |
184 | else if (field != NULL && streq(field, "name")) | |
185 | printf("%s%c", kmod_module_get_name(mod), separator); | |
e7e2cb61 AG |
186 | filename = "(builtin)"; |
187 | } | |
0cc3ccfd | 188 | |
5b0436a7 | 189 | if (field != NULL && streq(field, "filename")) { |
e7e2cb61 | 190 | printf("%s%c", filename, separator); |
0cc3ccfd GSB |
191 | return 0; |
192 | } else if (field == NULL) { | |
193 | printf("%-16s%s%c", "filename:", | |
e7e2cb61 | 194 | filename, separator); |
0cc3ccfd GSB |
195 | } |
196 | ||
197 | err = kmod_module_get_info(mod, &list); | |
198 | if (err < 0) { | |
e7e2cb61 AG |
199 | if (is_builtin && err == -ENOENT) { |
200 | /* | |
201 | * This is an old kernel that does not have a file | |
202 | * with information about built-in modules. | |
203 | */ | |
204 | return 0; | |
205 | } | |
9382dbf7 | 206 | ERR("could not get modinfo from '%s': %s\n", |
0cc3ccfd GSB |
207 | kmod_module_get_name(mod), strerror(-err)); |
208 | return err; | |
209 | } | |
210 | ||
5b0436a7 | 211 | if (field != NULL && streq(field, "parm")) { |
b014c490 GSB |
212 | err = modinfo_params_do(list); |
213 | goto end; | |
214 | } | |
215 | ||
0cc3ccfd GSB |
216 | kmod_list_foreach(l, list) { |
217 | const char *key = kmod_module_info_get_key(l); | |
218 | const char *value = kmod_module_info_get_value(l); | |
219 | int keylen; | |
220 | ||
221 | if (field != NULL) { | |
5b0436a7 | 222 | if (!streq(field, key)) |
0cc3ccfd GSB |
223 | continue; |
224 | /* filtered output contains no key, just value */ | |
225 | printf("%s%c", value, separator); | |
226 | continue; | |
227 | } | |
228 | ||
5b0436a7 | 229 | if (streq(key, "parm") || streq(key, "parmtype")) { |
b014c490 GSB |
230 | err = process_parm(key, value, ¶ms); |
231 | if (err < 0) | |
0cc3ccfd | 232 | goto end; |
0cc3ccfd GSB |
233 | continue; |
234 | } | |
235 | ||
236 | if (separator == '\0') { | |
237 | printf("%s=%s%c", key, value, separator); | |
238 | continue; | |
239 | } | |
240 | ||
241 | keylen = strlen(key); | |
242 | printf("%s:%-*s%s%c", key, 15 - keylen, "", value, separator); | |
243 | } | |
244 | ||
245 | if (field != NULL) | |
246 | goto end; | |
247 | ||
248 | while (params != NULL) { | |
249 | struct param *p = params; | |
250 | params = p->next; | |
251 | ||
252 | if (p->param == NULL) | |
253 | printf("%-16s%.*s:%.*s%c", "parm:", | |
254 | p->namelen, p->name, p->typelen, p->type, | |
255 | separator); | |
256 | else if (p->type != NULL) | |
515ec796 | 257 | printf("%-16s%.*s:%.*s (%.*s)%c", "parm:", |
0cc3ccfd GSB |
258 | p->namelen, p->name, |
259 | p->paramlen, p->param, | |
260 | p->typelen, p->type, | |
261 | separator); | |
262 | else | |
515ec796 | 263 | printf("%-16s%.*s:%.*s%c", |
0cc3ccfd GSB |
264 | "parm:", |
265 | p->namelen, p->name, | |
266 | p->paramlen, p->param, | |
267 | separator); | |
268 | ||
269 | free(p); | |
270 | } | |
271 | ||
272 | end: | |
273 | while (params != NULL) { | |
274 | void *tmp = params; | |
275 | params = params->next; | |
276 | free(tmp); | |
277 | } | |
278 | kmod_module_info_free_list(list); | |
279 | ||
280 | return err; | |
281 | } | |
282 | ||
283 | static int modinfo_path_do(struct kmod_ctx *ctx, const char *path) | |
284 | { | |
285 | struct kmod_module *mod; | |
286 | int err = kmod_module_new_from_path(ctx, path, &mod); | |
287 | if (err < 0) { | |
9382dbf7 | 288 | ERR("Module file %s not found.\n", path); |
0cc3ccfd GSB |
289 | return err; |
290 | } | |
291 | err = modinfo_do(mod); | |
292 | kmod_module_unref(mod); | |
293 | return err; | |
294 | } | |
295 | ||
296 | static int modinfo_alias_do(struct kmod_ctx *ctx, const char *alias) | |
297 | { | |
e7e2cb61 | 298 | struct kmod_list *l, *list = NULL; |
0cc3ccfd GSB |
299 | int err = kmod_module_new_from_lookup(ctx, alias, &list); |
300 | if (err < 0) { | |
9382dbf7 | 301 | ERR("Module alias %s not found.\n", alias); |
0cc3ccfd GSB |
302 | return err; |
303 | } | |
5f85a133 DR |
304 | |
305 | if (list == NULL) { | |
9382dbf7 | 306 | ERR("Module %s not found.\n", alias); |
5f85a133 DR |
307 | return -ENOENT; |
308 | } | |
309 | ||
e7e2cb61 | 310 | kmod_list_foreach(l, list) { |
0cc3ccfd GSB |
311 | struct kmod_module *mod = kmod_module_get_module(l); |
312 | int r = modinfo_do(mod); | |
313 | kmod_module_unref(mod); | |
314 | if (r < 0) | |
315 | err = r; | |
316 | } | |
e7e2cb61 | 317 | kmod_module_unref_list(list); |
0cc3ccfd GSB |
318 | return err; |
319 | } | |
320 | ||
022e1f0e | 321 | static const char cmdopts_s[] = "adlpn0F:k:b:Vh"; |
0cc3ccfd GSB |
322 | static const struct option cmdopts[] = { |
323 | {"author", no_argument, 0, 'a'}, | |
324 | {"description", no_argument, 0, 'd'}, | |
325 | {"license", no_argument, 0, 'l'}, | |
326 | {"parameters", no_argument, 0, 'p'}, | |
327 | {"filename", no_argument, 0, 'n'}, | |
328 | {"null", no_argument, 0, '0'}, | |
329 | {"field", required_argument, 0, 'F'}, | |
330 | {"set-version", required_argument, 0, 'k'}, | |
331 | {"basedir", required_argument, 0, 'b'}, | |
332 | {"version", no_argument, 0, 'V'}, | |
333 | {"help", no_argument, 0, 'h'}, | |
334 | {NULL, 0, 0, 0} | |
335 | }; | |
336 | ||
4a2e20df | 337 | static void help(void) |
0cc3ccfd | 338 | { |
34e06bfb | 339 | printf("Usage:\n" |
0cc3ccfd GSB |
340 | "\t%s [options] filename [args]\n" |
341 | "Options:\n" | |
342 | "\t-a, --author Print only 'author'\n" | |
343 | "\t-d, --description Print only 'description'\n" | |
344 | "\t-l, --license Print only 'license'\n" | |
345 | "\t-p, --parameters Print only 'parm'\n" | |
346 | "\t-n, --filename Print only 'filename'\n" | |
347 | "\t-0, --null Use \\0 instead of \\n\n" | |
348 | "\t-F, --field=FIELD Print only provided FIELD\n" | |
349 | "\t-k, --set-version=VERSION Use VERSION instead of `uname -r`\n" | |
c5b37dba | 350 | "\t-b, --basedir=DIR Use DIR as filesystem root for /lib/modules\n" |
0cc3ccfd GSB |
351 | "\t-V, --version Show version\n" |
352 | "\t-h, --help Show this help\n", | |
7c04aeee | 353 | program_invocation_short_name); |
0cc3ccfd GSB |
354 | } |
355 | ||
a23f0c9c DM |
356 | static bool is_module_filename(const char *name) |
357 | { | |
358 | struct stat st; | |
a23f0c9c DM |
359 | |
360 | if (stat(name, &st) == 0 && S_ISREG(st.st_mode) && | |
6f02b6fa | 361 | path_ends_with_kmod_ext(name, strlen(name))) |
a23f0c9c | 362 | return true; |
a23f0c9c DM |
363 | |
364 | return false; | |
365 | } | |
366 | ||
769becb5 | 367 | static int do_modinfo(int argc, char *argv[]) |
0cc3ccfd GSB |
368 | { |
369 | struct kmod_ctx *ctx; | |
370 | char dirname_buf[PATH_MAX]; | |
371 | const char *dirname = NULL; | |
372 | const char *kversion = NULL; | |
373 | const char *root = NULL; | |
374 | const char *null_config = NULL; | |
375 | int i, err; | |
376 | ||
377 | for (;;) { | |
378 | int c, idx = 0; | |
379 | c = getopt_long(argc, argv, cmdopts_s, cmdopts, &idx); | |
380 | if (c == -1) | |
381 | break; | |
382 | switch (c) { | |
383 | case 'a': | |
384 | field = "author"; | |
385 | break; | |
386 | case 'd': | |
387 | field = "description"; | |
388 | break; | |
389 | case 'l': | |
390 | field = "license"; | |
391 | break; | |
392 | case 'p': | |
393 | field = "parm"; | |
394 | break; | |
395 | case 'n': | |
396 | field = "filename"; | |
397 | break; | |
398 | case '0': | |
399 | separator = '\0'; | |
400 | break; | |
401 | case 'F': | |
402 | field = optarg; | |
403 | break; | |
404 | case 'k': | |
405 | kversion = optarg; | |
406 | break; | |
407 | case 'b': | |
408 | root = optarg; | |
409 | break; | |
410 | case 'h': | |
4a2e20df | 411 | help(); |
0cc3ccfd GSB |
412 | return EXIT_SUCCESS; |
413 | case 'V': | |
414 | puts(PACKAGE " version " VERSION); | |
655de275 | 415 | puts(KMOD_FEATURES); |
0cc3ccfd GSB |
416 | return EXIT_SUCCESS; |
417 | case '?': | |
418 | return EXIT_FAILURE; | |
419 | default: | |
9382dbf7 | 420 | ERR("unexpected getopt_long() value '%c'.\n", c); |
0cc3ccfd GSB |
421 | return EXIT_FAILURE; |
422 | } | |
423 | } | |
424 | ||
425 | if (optind >= argc) { | |
9382dbf7 | 426 | ERR("missing module or filename.\n"); |
0cc3ccfd GSB |
427 | return EXIT_FAILURE; |
428 | } | |
429 | ||
430 | if (root != NULL || kversion != NULL) { | |
431 | struct utsname u; | |
432 | if (root == NULL) | |
433 | root = ""; | |
434 | if (kversion == NULL) { | |
435 | if (uname(&u) < 0) { | |
9382dbf7 | 436 | ERR("uname() failed: %m\n"); |
0cc3ccfd GSB |
437 | return EXIT_FAILURE; |
438 | } | |
439 | kversion = u.release; | |
440 | } | |
c5b37dba | 441 | snprintf(dirname_buf, sizeof(dirname_buf), "%s/lib/modules/%s", |
0cc3ccfd GSB |
442 | root, kversion); |
443 | dirname = dirname_buf; | |
444 | } | |
445 | ||
446 | ctx = kmod_new(dirname, &null_config); | |
447 | if (!ctx) { | |
9382dbf7 | 448 | ERR("kmod_new() failed!\n"); |
0cc3ccfd GSB |
449 | return EXIT_FAILURE; |
450 | } | |
0cc3ccfd GSB |
451 | |
452 | err = 0; | |
453 | for (i = optind; i < argc; i++) { | |
454 | const char *name = argv[i]; | |
0cc3ccfd GSB |
455 | int r; |
456 | ||
a23f0c9c | 457 | if (is_module_filename(name)) |
0cc3ccfd GSB |
458 | r = modinfo_path_do(ctx, name); |
459 | else | |
460 | r = modinfo_alias_do(ctx, name); | |
461 | ||
462 | if (r < 0) | |
463 | err = r; | |
464 | } | |
465 | ||
466 | kmod_unref(ctx); | |
467 | return err >= 0 ? EXIT_SUCCESS : EXIT_FAILURE; | |
468 | } | |
769becb5 | 469 | |
769becb5 LDM |
470 | const struct kmod_cmd kmod_cmd_compat_modinfo = { |
471 | .name = "modinfo", | |
472 | .cmd = do_modinfo, | |
473 | .help = "compat modinfo command", | |
474 | }; |