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Commit | Line | Data |
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7c2ab358 LDM |
1 | /* |
2 | * libkmod - interface to kernel module operations | |
3 | * | |
e6b0e49b | 4 | * Copyright (C) 2011-2013 ProFUSION embedded systems |
342e9cea | 5 | * Copyright (C) 2013 Intel Corporation. All rights reserved. |
7c2ab358 LDM |
6 | * |
7 | * This library is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU Lesser General Public | |
cb451f35 LDM |
9 | * License as published by the Free Software Foundation; either |
10 | * version 2.1 of the License, or (at your option) any later version. | |
7c2ab358 LDM |
11 | * |
12 | * This library is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public | |
18 | * License along with this library; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
20 | */ | |
21 | ||
22 | #include <stdio.h> | |
23 | #include <stdlib.h> | |
24 | #include <stddef.h> | |
25 | #include <stdarg.h> | |
26 | #include <unistd.h> | |
27 | #include <errno.h> | |
28 | #include <string.h> | |
29 | #include <ctype.h> | |
30 | #include <sys/stat.h> | |
31 | #include <sys/types.h> | |
32 | #include <dirent.h> | |
33 | ||
34 | #include "libkmod.h" | |
83b855a6 | 35 | #include "libkmod-internal.h" |
7c2ab358 | 36 | |
7c2ab358 LDM |
37 | struct kmod_alias { |
38 | char *name; | |
43c29d10 | 39 | char modname[]; |
7c2ab358 LDM |
40 | }; |
41 | ||
615c42be LDM |
42 | struct kmod_options { |
43 | char *options; | |
44 | char modname[]; | |
45 | }; | |
46 | ||
a5cce6d6 LDM |
47 | struct kmod_command { |
48 | char *command; | |
49 | char modname[]; | |
50 | }; | |
51 | ||
1c522600 GSB |
52 | struct kmod_softdep { |
53 | char *name; | |
54 | const char **pre; | |
55 | const char **post; | |
56 | unsigned int n_pre; | |
57 | unsigned int n_post; | |
58 | }; | |
59 | ||
c1c9c446 LDM |
60 | const char *kmod_blacklist_get_modname(const struct kmod_list *l) |
61 | { | |
62 | return l->data; | |
63 | } | |
64 | ||
b0ef19f7 | 65 | const char *kmod_alias_get_name(const struct kmod_list *l) { |
1ce08a56 | 66 | const struct kmod_alias *alias = l->data; |
b0ef19f7 LDM |
67 | return alias->name; |
68 | } | |
69 | ||
70 | const char *kmod_alias_get_modname(const struct kmod_list *l) { | |
1ce08a56 | 71 | const struct kmod_alias *alias = l->data; |
b0ef19f7 LDM |
72 | return alias->modname; |
73 | } | |
74 | ||
bd3f5535 GSB |
75 | const char *kmod_option_get_options(const struct kmod_list *l) { |
76 | const struct kmod_options *alias = l->data; | |
77 | return alias->options; | |
78 | } | |
79 | ||
80 | const char *kmod_option_get_modname(const struct kmod_list *l) { | |
81 | const struct kmod_options *alias = l->data; | |
82 | return alias->modname; | |
83 | } | |
84 | ||
85 | const char *kmod_command_get_command(const struct kmod_list *l) { | |
86 | const struct kmod_command *alias = l->data; | |
87 | return alias->command; | |
88 | } | |
89 | ||
90 | const char *kmod_command_get_modname(const struct kmod_list *l) { | |
91 | const struct kmod_command *alias = l->data; | |
92 | return alias->modname; | |
93 | } | |
94 | ||
1c522600 GSB |
95 | const char *kmod_softdep_get_name(const struct kmod_list *l) { |
96 | const struct kmod_softdep *dep = l->data; | |
97 | return dep->name; | |
98 | } | |
99 | ||
100 | const char * const *kmod_softdep_get_pre(const struct kmod_list *l, unsigned int *count) { | |
101 | const struct kmod_softdep *dep = l->data; | |
102 | *count = dep->n_pre; | |
103 | return dep->pre; | |
104 | } | |
105 | ||
106 | const char * const *kmod_softdep_get_post(const struct kmod_list *l, unsigned int *count) { | |
107 | const struct kmod_softdep *dep = l->data; | |
108 | *count = dep->n_post; | |
109 | return dep->post; | |
110 | } | |
111 | ||
d30319e4 MF |
112 | /* |
113 | * Replace dashes with underscores. | |
114 | * Dashes inside character range patterns (e.g. [0-9]) are left unchanged. | |
115 | */ | |
116 | static char *underscores(struct kmod_ctx *ctx, char *s) | |
117 | { | |
118 | unsigned int i; | |
119 | ||
120 | if (!s) | |
121 | return NULL; | |
122 | ||
123 | for (i = 0; s[i]; i++) { | |
124 | switch (s[i]) { | |
125 | case '-': | |
126 | s[i] = '_'; | |
127 | break; | |
128 | ||
129 | case ']': | |
130 | INFO(ctx, "Unmatched bracket in %s\n", s); | |
131 | break; | |
132 | ||
133 | case '[': | |
134 | i += strcspn(&s[i], "]"); | |
135 | if (!s[i]) | |
136 | INFO(ctx, "Unmatched bracket in %s\n", s); | |
137 | break; | |
138 | } | |
139 | } | |
140 | return s; | |
141 | } | |
142 | ||
a5cce6d6 LDM |
143 | static int kmod_config_add_command(struct kmod_config *config, |
144 | const char *modname, | |
145 | const char *command, | |
146 | const char *command_name, | |
147 | struct kmod_list **list) | |
148 | { | |
342e9cea | 149 | _cleanup_free_ struct kmod_command *cmd; |
a5cce6d6 LDM |
150 | struct kmod_list *l; |
151 | size_t modnamelen = strlen(modname) + 1; | |
152 | size_t commandlen = strlen(command) + 1; | |
153 | ||
e5a7f6ac | 154 | DBG(config->ctx, "modname='%s' cmd='%s %s'\n", modname, command_name, |
a5cce6d6 LDM |
155 | command); |
156 | ||
157 | cmd = malloc(sizeof(*cmd) + modnamelen + commandlen); | |
342e9cea LDM |
158 | if (!cmd) |
159 | return -ENOMEM; | |
a5cce6d6 LDM |
160 | |
161 | cmd->command = sizeof(*cmd) + modnamelen + (char *)cmd; | |
162 | memcpy(cmd->modname, modname, modnamelen); | |
163 | memcpy(cmd->command, command, commandlen); | |
164 | ||
165 | l = kmod_list_append(*list, cmd); | |
342e9cea LDM |
166 | if (!l) |
167 | return -ENOMEM; | |
a5cce6d6 LDM |
168 | |
169 | *list = l; | |
342e9cea | 170 | cmd = NULL; |
a5cce6d6 | 171 | return 0; |
a5cce6d6 LDM |
172 | } |
173 | ||
174 | static void kmod_config_free_command(struct kmod_config *config, | |
175 | struct kmod_list *l, | |
176 | struct kmod_list **list) | |
177 | { | |
178 | struct kmod_command *cmd = l->data; | |
179 | ||
180 | free(cmd); | |
181 | *list = kmod_list_remove(l); | |
182 | } | |
183 | ||
615c42be LDM |
184 | static int kmod_config_add_options(struct kmod_config *config, |
185 | const char *modname, const char *options) | |
186 | { | |
342e9cea | 187 | _cleanup_free_ struct kmod_options *opt; |
615c42be LDM |
188 | struct kmod_list *list; |
189 | size_t modnamelen = strlen(modname) + 1; | |
190 | size_t optionslen = strlen(options) + 1; | |
191 | ||
23c0d012 | 192 | DBG(config->ctx, "modname='%s' options='%s'\n", modname, options); |
615c42be LDM |
193 | |
194 | opt = malloc(sizeof(*opt) + modnamelen + optionslen); | |
342e9cea LDM |
195 | if (!opt) |
196 | return -ENOMEM; | |
615c42be LDM |
197 | |
198 | opt->options = sizeof(*opt) + modnamelen + (char *)opt; | |
199 | ||
200 | memcpy(opt->modname, modname, modnamelen); | |
201 | memcpy(opt->options, options, optionslen); | |
202 | strchr_replace(opt->options, '\t', ' '); | |
203 | ||
204 | list = kmod_list_append(config->options, opt); | |
342e9cea LDM |
205 | if (!list) |
206 | return -ENOMEM; | |
615c42be | 207 | |
342e9cea | 208 | opt = NULL; |
615c42be LDM |
209 | config->options = list; |
210 | return 0; | |
615c42be LDM |
211 | } |
212 | ||
c35347f1 LDM |
213 | static void kmod_config_free_options(struct kmod_config *config, |
214 | struct kmod_list *l) | |
615c42be LDM |
215 | { |
216 | struct kmod_options *opt = l->data; | |
217 | ||
218 | free(opt); | |
219 | ||
220 | config->options = kmod_list_remove(l); | |
221 | } | |
222 | ||
d13e606f | 223 | static int kmod_config_add_alias(struct kmod_config *config, |
c35347f1 | 224 | const char *name, const char *modname) |
7c2ab358 | 225 | { |
342e9cea | 226 | _cleanup_free_ struct kmod_alias *alias; |
d13e606f | 227 | struct kmod_list *list; |
43c29d10 | 228 | size_t namelen = strlen(name) + 1, modnamelen = strlen(modname) + 1; |
7c2ab358 | 229 | |
d13e606f | 230 | DBG(config->ctx, "name=%s modname=%s\n", name, modname); |
7c2ab358 | 231 | |
43c29d10 | 232 | alias = malloc(sizeof(*alias) + namelen + modnamelen); |
d13e606f | 233 | if (!alias) |
342e9cea | 234 | return -ENOMEM; |
28c175ed | 235 | |
43c29d10 GSB |
236 | alias->name = sizeof(*alias) + modnamelen + (char *)alias; |
237 | ||
238 | memcpy(alias->modname, modname, modnamelen); | |
239 | memcpy(alias->name, name, namelen); | |
7c2ab358 | 240 | |
d13e606f GSB |
241 | list = kmod_list_append(config->aliases, alias); |
242 | if (!list) | |
342e9cea | 243 | return -ENOMEM; |
28c175ed | 244 | |
342e9cea | 245 | alias = NULL; |
d13e606f GSB |
246 | config->aliases = list; |
247 | return 0; | |
7c2ab358 LDM |
248 | } |
249 | ||
c35347f1 LDM |
250 | static void kmod_config_free_alias(struct kmod_config *config, |
251 | struct kmod_list *l) | |
7c2ab358 LDM |
252 | { |
253 | struct kmod_alias *alias = l->data; | |
254 | ||
7c2ab358 LDM |
255 | free(alias); |
256 | ||
d13e606f | 257 | config->aliases = kmod_list_remove(l); |
7c2ab358 LDM |
258 | } |
259 | ||
d13e606f | 260 | static int kmod_config_add_blacklist(struct kmod_config *config, |
c35347f1 | 261 | const char *modname) |
81cf2060 | 262 | { |
342e9cea | 263 | _cleanup_free_ char *p; |
d13e606f | 264 | struct kmod_list *list; |
81cf2060 | 265 | |
d13e606f | 266 | DBG(config->ctx, "modname=%s\n", modname); |
81cf2060 LDM |
267 | |
268 | p = strdup(modname); | |
d13e606f | 269 | if (!p) |
342e9cea | 270 | return -ENOMEM; |
d13e606f GSB |
271 | |
272 | list = kmod_list_append(config->blacklists, p); | |
273 | if (!list) | |
342e9cea LDM |
274 | return -ENOMEM; |
275 | ||
276 | p = NULL; | |
d13e606f GSB |
277 | config->blacklists = list; |
278 | return 0; | |
81cf2060 LDM |
279 | } |
280 | ||
d13e606f | 281 | static void kmod_config_free_blacklist(struct kmod_config *config, |
81cf2060 LDM |
282 | struct kmod_list *l) |
283 | { | |
284 | free(l->data); | |
d13e606f | 285 | config->blacklists = kmod_list_remove(l); |
81cf2060 LDM |
286 | } |
287 | ||
1c522600 GSB |
288 | static int kmod_config_add_softdep(struct kmod_config *config, |
289 | const char *modname, | |
290 | const char *line) | |
291 | { | |
292 | struct kmod_list *list; | |
293 | struct kmod_softdep *dep; | |
294 | const char *s, *p; | |
295 | char *itr; | |
296 | unsigned int n_pre = 0, n_post = 0; | |
297 | size_t modnamelen = strlen(modname) + 1; | |
298 | size_t buflen = 0; | |
299 | bool was_space = false; | |
300 | enum { S_NONE, S_PRE, S_POST } mode = S_NONE; | |
301 | ||
302 | DBG(config->ctx, "modname=%s\n", modname); | |
303 | ||
304 | /* analyze and count */ | |
305 | for (p = s = line; ; s++) { | |
306 | size_t plen; | |
307 | ||
308 | if (*s != '\0') { | |
309 | if (!isspace(*s)) { | |
310 | was_space = false; | |
311 | continue; | |
312 | } | |
313 | ||
314 | if (was_space) { | |
315 | p = s + 1; | |
316 | continue; | |
317 | } | |
318 | was_space = true; | |
319 | ||
320 | if (p >= s) | |
321 | continue; | |
322 | } | |
323 | plen = s - p; | |
324 | ||
325 | if (plen == sizeof("pre:") - 1 && | |
326 | memcmp(p, "pre:", sizeof("pre:") - 1) == 0) | |
327 | mode = S_PRE; | |
328 | else if (plen == sizeof("post:") - 1 && | |
329 | memcmp(p, "post:", sizeof("post:") - 1) == 0) | |
330 | mode = S_POST; | |
331 | else if (*s != '\0' || (*s == '\0' && !was_space)) { | |
332 | if (mode == S_PRE) { | |
333 | buflen += plen + 1; | |
334 | n_pre++; | |
335 | } else if (mode == S_POST) { | |
336 | buflen += plen + 1; | |
337 | n_post++; | |
338 | } | |
339 | } | |
340 | p = s + 1; | |
341 | if (*s == '\0') | |
342 | break; | |
343 | } | |
344 | ||
345 | DBG(config->ctx, "%u pre, %u post\n", n_pre, n_post); | |
346 | ||
347 | dep = malloc(sizeof(struct kmod_softdep) + modnamelen + | |
348 | n_pre * sizeof(const char *) + | |
349 | n_post * sizeof(const char *) + | |
350 | buflen); | |
351 | if (dep == NULL) { | |
352 | ERR(config->ctx, "out-of-memory modname=%s\n", modname); | |
353 | return -ENOMEM; | |
354 | } | |
355 | dep->n_pre = n_pre; | |
356 | dep->n_post = n_post; | |
357 | dep->pre = (const char **)((char *)dep + sizeof(struct kmod_softdep)); | |
358 | dep->post = dep->pre + n_pre; | |
359 | dep->name = (char *)(dep->post + n_post); | |
360 | ||
361 | memcpy(dep->name, modname, modnamelen); | |
362 | ||
363 | /* copy strings */ | |
364 | itr = dep->name + modnamelen; | |
365 | n_pre = 0; | |
366 | n_post = 0; | |
367 | mode = S_NONE; | |
368 | for (p = s = line; ; s++) { | |
369 | size_t plen; | |
370 | ||
371 | if (*s != '\0') { | |
372 | if (!isspace(*s)) { | |
373 | was_space = false; | |
374 | continue; | |
375 | } | |
376 | ||
377 | if (was_space) { | |
378 | p = s + 1; | |
379 | continue; | |
380 | } | |
381 | was_space = true; | |
382 | ||
383 | if (p >= s) | |
384 | continue; | |
385 | } | |
386 | plen = s - p; | |
387 | ||
388 | if (plen == sizeof("pre:") - 1 && | |
389 | memcmp(p, "pre:", sizeof("pre:") - 1) == 0) | |
390 | mode = S_PRE; | |
391 | else if (plen == sizeof("post:") - 1 && | |
392 | memcmp(p, "post:", sizeof("post:") - 1) == 0) | |
393 | mode = S_POST; | |
394 | else if (*s != '\0' || (*s == '\0' && !was_space)) { | |
395 | if (mode == S_PRE) { | |
396 | dep->pre[n_pre] = itr; | |
397 | memcpy(itr, p, plen); | |
398 | itr[plen] = '\0'; | |
399 | itr += plen + 1; | |
400 | n_pre++; | |
401 | } else if (mode == S_POST) { | |
402 | dep->post[n_post] = itr; | |
403 | memcpy(itr, p, plen); | |
404 | itr[plen] = '\0'; | |
405 | itr += plen + 1; | |
406 | n_post++; | |
407 | } | |
408 | } | |
409 | p = s + 1; | |
410 | if (*s == '\0') | |
411 | break; | |
412 | } | |
413 | ||
414 | list = kmod_list_append(config->softdeps, dep); | |
415 | if (list == NULL) { | |
416 | free(dep); | |
417 | return -ENOMEM; | |
418 | } | |
419 | config->softdeps = list; | |
420 | ||
421 | return 0; | |
422 | } | |
423 | ||
6b04ef32 LDM |
424 | static char *softdep_to_char(struct kmod_softdep *dep) { |
425 | const size_t sz_preprefix = sizeof("pre: ") - 1; | |
426 | const size_t sz_postprefix = sizeof("post: ") - 1; | |
427 | size_t sz = 1; /* at least '\0' */ | |
428 | size_t sz_pre, sz_post; | |
429 | const char *start, *end; | |
430 | char *s, *itr; | |
431 | ||
432 | /* | |
433 | * Rely on the fact that dep->pre[] and dep->post[] are strv's that | |
434 | * point to a contiguous buffer | |
435 | */ | |
436 | if (dep->n_pre > 0) { | |
437 | start = dep->pre[0]; | |
438 | end = dep->pre[dep->n_pre - 1] | |
439 | + strlen(dep->pre[dep->n_pre - 1]); | |
440 | sz_pre = end - start; | |
441 | sz += sz_pre + sz_preprefix; | |
442 | } else | |
443 | sz_pre = 0; | |
444 | ||
445 | if (dep->n_post > 0) { | |
446 | start = dep->post[0]; | |
447 | end = dep->post[dep->n_post - 1] | |
448 | + strlen(dep->post[dep->n_post - 1]); | |
449 | sz_post = end - start; | |
450 | sz += sz_post + sz_postprefix; | |
451 | } else | |
452 | sz_post = 0; | |
453 | ||
454 | itr = s = malloc(sz); | |
455 | if (s == NULL) | |
456 | return NULL; | |
457 | ||
458 | if (sz_pre) { | |
459 | char *p; | |
460 | ||
461 | memcpy(itr, "pre: ", sz_preprefix); | |
462 | itr += sz_preprefix; | |
463 | ||
464 | /* include last '\0' */ | |
465 | memcpy(itr, dep->pre[0], sz_pre + 1); | |
466 | for (p = itr; p < itr + sz_pre; p++) { | |
467 | if (*p == '\0') | |
468 | *p = ' '; | |
469 | } | |
470 | itr = p; | |
471 | } | |
472 | ||
473 | if (sz_post) { | |
474 | char *p; | |
475 | ||
476 | memcpy(itr, "post: ", sz_postprefix); | |
477 | itr += sz_postprefix; | |
478 | ||
479 | /* include last '\0' */ | |
480 | memcpy(itr, dep->post[0], sz_post + 1); | |
481 | for (p = itr; p < itr + sz_post; p++) { | |
482 | if (*p == '\0') | |
483 | *p = ' '; | |
484 | } | |
485 | itr = p; | |
486 | } | |
487 | ||
488 | *itr = '\0'; | |
489 | ||
490 | return s; | |
491 | } | |
492 | ||
1c522600 GSB |
493 | static void kmod_config_free_softdep(struct kmod_config *config, |
494 | struct kmod_list *l) | |
495 | { | |
496 | free(l->data); | |
497 | config->softdeps = kmod_list_remove(l); | |
498 | } | |
499 | ||
1684e440 LDM |
500 | static void kcmdline_parse_result(struct kmod_config *config, char *modname, |
501 | char *param, char *value) | |
502 | { | |
493dc650 | 503 | if (modname == NULL || param == NULL) |
1684e440 LDM |
504 | return; |
505 | ||
506 | DBG(config->ctx, "%s %s\n", modname, param); | |
507 | ||
508 | if (streq(modname, "modprobe") && !strncmp(param, "blacklist=", 10)) { | |
509 | for (;;) { | |
510 | char *t = strsep(&value, ","); | |
511 | if (t == NULL) | |
512 | break; | |
513 | ||
514 | kmod_config_add_blacklist(config, t); | |
515 | } | |
516 | } else { | |
517 | kmod_config_add_options(config, | |
518 | underscores(config->ctx, modname), param); | |
519 | } | |
520 | } | |
521 | ||
522 | static int kmod_config_parse_kcmdline(struct kmod_config *config) | |
523 | { | |
524 | char buf[KCMD_LINE_SIZE]; | |
525 | int fd, err; | |
aa878540 | 526 | char *p, *modname, *param = NULL, *value = NULL, is_module = 1; |
1684e440 | 527 | |
79e5ea91 | 528 | fd = open("/proc/cmdline", O_RDONLY|O_CLOEXEC); |
dd1cf10f LDM |
529 | if (fd < 0) { |
530 | err = -errno; | |
531 | DBG(config->ctx, "could not open '/proc/cmdline' for reading: %m\n"); | |
532 | return err; | |
533 | } | |
534 | ||
1684e440 LDM |
535 | err = read_str_safe(fd, buf, sizeof(buf)); |
536 | close(fd); | |
537 | if (err < 0) { | |
538 | ERR(config->ctx, "could not read from '/proc/cmdline': %s\n", | |
539 | strerror(-err)); | |
540 | return err; | |
541 | } | |
542 | ||
543 | for (p = buf, modname = buf; *p != '\0' && *p != '\n'; p++) { | |
544 | switch (*p) { | |
545 | case ' ': | |
546 | *p = '\0'; | |
aa878540 MM |
547 | if (is_module) |
548 | kcmdline_parse_result(config, modname, param, value); | |
1684e440 LDM |
549 | param = value = NULL; |
550 | modname = p + 1; | |
aa878540 | 551 | is_module = 1; |
1684e440 LDM |
552 | break; |
553 | case '.': | |
66f3228d LDM |
554 | if (param == NULL) { |
555 | *p = '\0'; | |
556 | param = p + 1; | |
557 | } | |
1684e440 LDM |
558 | break; |
559 | case '=': | |
135bffd6 LDM |
560 | if (param != NULL) |
561 | value = p + 1; | |
aa878540 MM |
562 | else |
563 | is_module = 0; | |
1684e440 LDM |
564 | break; |
565 | } | |
566 | } | |
567 | ||
568 | *p = '\0'; | |
aa878540 MM |
569 | if (is_module) |
570 | kcmdline_parse_result(config, modname, param, value); | |
1684e440 LDM |
571 | |
572 | return 0; | |
573 | } | |
574 | ||
b7b7ac29 LDM |
575 | /* |
576 | * Take an fd and own it. It will be closed on return. filename is used only | |
577 | * for debug messages | |
578 | */ | |
579 | static int kmod_config_parse(struct kmod_config *config, int fd, | |
580 | const char *filename) | |
7c2ab358 | 581 | { |
d13e606f | 582 | struct kmod_ctx *ctx = config->ctx; |
7c2ab358 LDM |
583 | char *line; |
584 | FILE *fp; | |
759214fa | 585 | unsigned int linenum = 0; |
b7b7ac29 | 586 | int err; |
7c2ab358 | 587 | |
b7b7ac29 LDM |
588 | fp = fdopen(fd, "r"); |
589 | if (fp == NULL) { | |
590 | err = -errno; | |
050db08c | 591 | ERR(config->ctx, "fd %d: %m\n", fd); |
b7b7ac29 LDM |
592 | close(fd); |
593 | return err; | |
594 | } | |
7c2ab358 LDM |
595 | |
596 | while ((line = getline_wrapped(fp, &linenum)) != NULL) { | |
c11e62bf | 597 | char *cmd, *saveptr; |
7c2ab358 LDM |
598 | |
599 | if (line[0] == '\0' || line[0] == '#') | |
600 | goto done_next; | |
601 | ||
c11e62bf | 602 | cmd = strtok_r(line, "\t ", &saveptr); |
7c2ab358 LDM |
603 | if (cmd == NULL) |
604 | goto done_next; | |
605 | ||
877e80cd | 606 | if (streq(cmd, "alias")) { |
c11e62bf LDM |
607 | char *alias = strtok_r(NULL, "\t ", &saveptr); |
608 | char *modname = strtok_r(NULL, "\t ", &saveptr); | |
7c2ab358 LDM |
609 | |
610 | if (alias == NULL || modname == NULL) | |
611 | goto syntax_error; | |
612 | ||
d13e606f | 613 | kmod_config_add_alias(config, |
30be7513 LDM |
614 | underscores(ctx, alias), |
615 | underscores(ctx, modname)); | |
877e80cd | 616 | } else if (streq(cmd, "blacklist")) { |
c11e62bf | 617 | char *modname = strtok_r(NULL, "\t ", &saveptr); |
81cf2060 LDM |
618 | |
619 | if (modname == NULL) | |
620 | goto syntax_error; | |
621 | ||
d13e606f | 622 | kmod_config_add_blacklist(config, |
2295acc5 | 623 | underscores(ctx, modname)); |
615c42be LDM |
624 | } else if (streq(cmd, "options")) { |
625 | char *modname = strtok_r(NULL, "\t ", &saveptr); | |
83121fde | 626 | char *options = strtok_r(NULL, "\0", &saveptr); |
615c42be | 627 | |
83121fde | 628 | if (modname == NULL || options == NULL) |
615c42be LDM |
629 | goto syntax_error; |
630 | ||
631 | kmod_config_add_options(config, | |
632 | underscores(ctx, modname), | |
83121fde | 633 | options); |
40ee8dad | 634 | } else if (streq(cmd, "install")) { |
a5cce6d6 | 635 | char *modname = strtok_r(NULL, "\t ", &saveptr); |
83121fde | 636 | char *installcmd = strtok_r(NULL, "\0", &saveptr); |
a5cce6d6 | 637 | |
83121fde | 638 | if (modname == NULL || installcmd == NULL) |
a5cce6d6 LDM |
639 | goto syntax_error; |
640 | ||
641 | kmod_config_add_command(config, | |
642 | underscores(ctx, modname), | |
83121fde | 643 | installcmd, |
a5cce6d6 | 644 | cmd, &config->install_commands); |
40ee8dad | 645 | } else if (streq(cmd, "remove")) { |
a5cce6d6 | 646 | char *modname = strtok_r(NULL, "\t ", &saveptr); |
83121fde | 647 | char *removecmd = strtok_r(NULL, "\0", &saveptr); |
a5cce6d6 | 648 | |
83121fde | 649 | if (modname == NULL || removecmd == NULL) |
a5cce6d6 LDM |
650 | goto syntax_error; |
651 | ||
652 | kmod_config_add_command(config, | |
653 | underscores(ctx, modname), | |
83121fde | 654 | removecmd, |
a5cce6d6 | 655 | cmd, &config->remove_commands); |
40ee8dad | 656 | } else if (streq(cmd, "softdep")) { |
1c522600 | 657 | char *modname = strtok_r(NULL, "\t ", &saveptr); |
83121fde | 658 | char *softdeps = strtok_r(NULL, "\0", &saveptr); |
1c522600 | 659 | |
83121fde | 660 | if (modname == NULL || softdeps == NULL) |
1c522600 GSB |
661 | goto syntax_error; |
662 | ||
663 | kmod_config_add_softdep(config, | |
664 | underscores(ctx, modname), | |
83121fde | 665 | softdeps); |
615c42be | 666 | } else if (streq(cmd, "include") |
877e80cd | 667 | || streq(cmd, "config")) { |
0ad5dd08 | 668 | ERR(ctx, "%s: command %s is deprecated and not parsed anymore\n", |
81cf2060 | 669 | filename, cmd); |
7c2ab358 LDM |
670 | } else { |
671 | syntax_error: | |
672 | ERR(ctx, "%s line %u: ignoring bad line starting with '%s'\n", | |
673 | filename, linenum, cmd); | |
674 | } | |
675 | ||
676 | done_next: | |
677 | free(line); | |
678 | } | |
679 | ||
680 | fclose(fp); | |
681 | ||
682 | return 0; | |
683 | } | |
684 | ||
d13e606f | 685 | void kmod_config_free(struct kmod_config *config) |
7c2ab358 LDM |
686 | { |
687 | while (config->aliases) | |
d13e606f | 688 | kmod_config_free_alias(config, config->aliases); |
81cf2060 LDM |
689 | |
690 | while (config->blacklists) | |
d13e606f GSB |
691 | kmod_config_free_blacklist(config, config->blacklists); |
692 | ||
615c42be LDM |
693 | while (config->options) |
694 | kmod_config_free_options(config, config->options); | |
695 | ||
a5cce6d6 LDM |
696 | while (config->install_commands) { |
697 | kmod_config_free_command(config, config->install_commands, | |
698 | &config->install_commands); | |
699 | } | |
700 | ||
701 | while (config->remove_commands) { | |
702 | kmod_config_free_command(config, config->remove_commands, | |
703 | &config->remove_commands); | |
704 | } | |
705 | ||
1c522600 GSB |
706 | while (config->softdeps) |
707 | kmod_config_free_softdep(config, config->softdeps); | |
708 | ||
b6a4dfb1 LDM |
709 | for (; config->paths != NULL; |
710 | config->paths = kmod_list_remove(config->paths)) | |
711 | free(config->paths->data); | |
712 | ||
d13e606f | 713 | free(config); |
7c2ab358 LDM |
714 | } |
715 | ||
98c80f44 LDM |
716 | static bool conf_files_filter_out(struct kmod_ctx *ctx, DIR *d, |
717 | const char *path, const char *fn) | |
7c2ab358 LDM |
718 | { |
719 | size_t len = strlen(fn); | |
98c80f44 | 720 | struct stat st; |
7c2ab358 LDM |
721 | |
722 | if (fn[0] == '.') | |
8f767e2d | 723 | return true; |
7c2ab358 | 724 | |
877e80cd | 725 | if (len < 6 || (!streq(&fn[len - 5], ".conf") |
9070b117 | 726 | && !streq(&fn[len - 6], ".alias"))) |
8f767e2d | 727 | return true; |
7c2ab358 | 728 | |
98c80f44 LDM |
729 | fstatat(dirfd(d), fn, &st, 0); |
730 | ||
731 | if (S_ISDIR(st.st_mode)) { | |
732 | ERR(ctx, "Directories inside directories are not supported: " | |
733 | "%s/%s\n", path, fn); | |
8f767e2d | 734 | return true; |
98c80f44 LDM |
735 | } |
736 | ||
8f767e2d | 737 | return false; |
7c2ab358 LDM |
738 | } |
739 | ||
7fe5f7ab LDM |
740 | struct conf_file { |
741 | const char *path; | |
742 | bool is_single; | |
743 | char name[]; | |
744 | }; | |
745 | ||
746 | static int conf_files_insert_sorted(struct kmod_ctx *ctx, | |
747 | struct kmod_list **list, | |
748 | const char *path, const char *name) | |
749 | { | |
750 | struct kmod_list *lpos, *tmp; | |
751 | struct conf_file *cf; | |
752 | size_t namelen; | |
753 | int cmp = -1; | |
754 | bool is_single = false; | |
755 | ||
756 | if (name == NULL) { | |
757 | name = basename(path); | |
758 | is_single = true; | |
759 | } | |
760 | ||
761 | kmod_list_foreach(lpos, *list) { | |
762 | cf = lpos->data; | |
763 | ||
764 | if ((cmp = strcmp(name, cf->name)) <= 0) | |
765 | break; | |
766 | } | |
767 | ||
768 | if (cmp == 0) { | |
769 | DBG(ctx, "Ignoring duplicate config file: %s/%s\n", path, | |
770 | name); | |
771 | return -EEXIST; | |
772 | } | |
773 | ||
774 | namelen = strlen(name); | |
775 | cf = malloc(sizeof(*cf) + namelen + 1); | |
776 | if (cf == NULL) | |
777 | return -ENOMEM; | |
778 | ||
779 | memcpy(cf->name, name, namelen + 1); | |
780 | cf->path = path; | |
781 | cf->is_single = is_single; | |
782 | ||
783 | if (lpos == NULL) | |
784 | tmp = kmod_list_append(*list, cf); | |
785 | else if (lpos == *list) | |
786 | tmp = kmod_list_prepend(*list, cf); | |
787 | else | |
788 | tmp = kmod_list_insert_before(lpos, cf); | |
789 | ||
790 | if (tmp == NULL) { | |
791 | free(cf); | |
792 | return -ENOMEM; | |
793 | } | |
794 | ||
795 | if (lpos == NULL || lpos == *list) | |
796 | *list = tmp; | |
797 | ||
798 | return 0; | |
799 | } | |
800 | ||
4782396c | 801 | /* |
7fe5f7ab | 802 | * Insert configuration files in @list, ignoring duplicates |
4782396c | 803 | */ |
7fe5f7ab | 804 | static int conf_files_list(struct kmod_ctx *ctx, struct kmod_list **list, |
b6a4dfb1 LDM |
805 | const char *path, |
806 | unsigned long long *path_stamp) | |
7c2ab358 | 807 | { |
7c2ab358 LDM |
808 | DIR *d; |
809 | int err; | |
7fe5f7ab | 810 | struct stat st; |
7e0385c4 | 811 | struct dirent *dent; |
7c2ab358 | 812 | |
7fe5f7ab LDM |
813 | if (stat(path, &st) != 0) { |
814 | err = -errno; | |
815 | DBG(ctx, "could not stat '%s': %m\n", path); | |
816 | return err; | |
817 | } | |
818 | ||
6068aaae | 819 | *path_stamp = stat_mstamp(&st); |
b6a4dfb1 | 820 | |
519d27de | 821 | if (!S_ISDIR(st.st_mode)) { |
7fe5f7ab LDM |
822 | conf_files_insert_sorted(ctx, list, path, NULL); |
823 | return 0; | |
7fe5f7ab | 824 | } |
1c250ec1 | 825 | |
7c2ab358 LDM |
826 | d = opendir(path); |
827 | if (d == NULL) { | |
dfa96f15 | 828 | ERR(ctx, "opendir(%s): %m\n", path); |
7fe5f7ab | 829 | return -EINVAL; |
7c2ab358 LDM |
830 | } |
831 | ||
7e0385c4 LDM |
832 | for (dent = readdir(d); dent != NULL; dent = readdir(d)) { |
833 | if (conf_files_filter_out(ctx, d, path, dent->d_name)) | |
7c2ab358 LDM |
834 | continue; |
835 | ||
7e0385c4 | 836 | conf_files_insert_sorted(ctx, list, path, dent->d_name); |
b7b7ac29 | 837 | } |
7c2ab358 | 838 | |
7fe5f7ab LDM |
839 | closedir(d); |
840 | return 0; | |
7c2ab358 LDM |
841 | } |
842 | ||
c35347f1 LDM |
843 | int kmod_config_new(struct kmod_ctx *ctx, struct kmod_config **p_config, |
844 | const char * const *config_paths) | |
7c2ab358 | 845 | { |
d13e606f | 846 | struct kmod_config *config; |
7fe5f7ab | 847 | struct kmod_list *list = NULL; |
b6a4dfb1 | 848 | struct kmod_list *path_list = NULL; |
b7b7ac29 | 849 | size_t i; |
7c2ab358 | 850 | |
8240333b TG |
851 | conf_files_insert_sorted(ctx, &list, kmod_get_dirname(ctx), "modules.softdep"); |
852 | ||
cb8d4d3e GSB |
853 | for (i = 0; config_paths[i] != NULL; i++) { |
854 | const char *path = config_paths[i]; | |
b6a4dfb1 LDM |
855 | unsigned long long path_stamp = 0; |
856 | size_t pathlen; | |
857 | struct kmod_list *tmp; | |
858 | struct kmod_config_path *cf; | |
859 | ||
860 | if (conf_files_list(ctx, &list, path, &path_stamp) < 0) | |
861 | continue; | |
862 | ||
863 | pathlen = strlen(path) + 1; | |
864 | cf = malloc(sizeof(*cf) + pathlen); | |
865 | if (cf == NULL) | |
866 | goto oom; | |
7c2ab358 | 867 | |
b6a4dfb1 LDM |
868 | cf->stamp = path_stamp; |
869 | memcpy(cf->path, path, pathlen); | |
870 | ||
871 | tmp = kmod_list_append(path_list, cf); | |
872 | if (tmp == NULL) | |
873 | goto oom; | |
874 | path_list = tmp; | |
7fe5f7ab | 875 | } |
cb8d4d3e | 876 | |
b6a4dfb1 LDM |
877 | *p_config = config = calloc(1, sizeof(struct kmod_config)); |
878 | if (config == NULL) | |
879 | goto oom; | |
880 | ||
881 | config->paths = path_list; | |
29b69c0b | 882 | config->ctx = ctx; |
b6a4dfb1 | 883 | |
7fe5f7ab LDM |
884 | for (; list != NULL; list = kmod_list_remove(list)) { |
885 | char fn[PATH_MAX]; | |
886 | struct conf_file *cf = list->data; | |
887 | int fd; | |
cb8d4d3e | 888 | |
7fe5f7ab LDM |
889 | if (cf->is_single) |
890 | strcpy(fn, cf->path); | |
891 | else | |
892 | snprintf(fn, sizeof(fn),"%s/%s", cf->path, | |
893 | cf->name); | |
7c2ab358 | 894 | |
7fe5f7ab LDM |
895 | fd = open(fn, O_RDONLY|O_CLOEXEC); |
896 | DBG(ctx, "parsing file '%s' fd=%d\n", fn, fd); | |
7c2ab358 | 897 | |
7fe5f7ab LDM |
898 | if (fd >= 0) |
899 | kmod_config_parse(config, fd, fn); | |
7c2ab358 | 900 | |
7fe5f7ab | 901 | free(cf); |
7c2ab358 LDM |
902 | } |
903 | ||
1684e440 LDM |
904 | kmod_config_parse_kcmdline(config); |
905 | ||
b7b7ac29 | 906 | return 0; |
b6a4dfb1 LDM |
907 | |
908 | oom: | |
909 | for (; list != NULL; list = kmod_list_remove(list)) | |
910 | free(list->data); | |
911 | ||
912 | for (; path_list != NULL; path_list = kmod_list_remove(path_list)) | |
913 | free(path_list->data); | |
914 | ||
915 | return -ENOMEM; | |
7c2ab358 | 916 | } |
00178629 LDM |
917 | |
918 | /********************************************************************** | |
919 | * struct kmod_config_iter functions | |
920 | **********************************************************************/ | |
921 | ||
922 | enum config_type { | |
923 | CONFIG_TYPE_BLACKLIST = 0, | |
924 | CONFIG_TYPE_INSTALL, | |
925 | CONFIG_TYPE_REMOVE, | |
926 | CONFIG_TYPE_ALIAS, | |
927 | CONFIG_TYPE_OPTION, | |
928 | CONFIG_TYPE_SOFTDEP, | |
929 | }; | |
930 | ||
931 | struct kmod_config_iter { | |
932 | enum config_type type; | |
6b04ef32 | 933 | bool intermediate; |
00178629 LDM |
934 | const struct kmod_list *list; |
935 | const struct kmod_list *curr; | |
6b04ef32 | 936 | void *data; |
00178629 LDM |
937 | const char *(*get_key)(const struct kmod_list *l); |
938 | const char *(*get_value)(const struct kmod_list *l); | |
939 | }; | |
940 | ||
6b04ef32 LDM |
941 | static const char *softdep_get_plain_softdep(const struct kmod_list *l) |
942 | { | |
943 | char *s = softdep_to_char(l->data); | |
944 | return s; | |
945 | } | |
946 | ||
00178629 LDM |
947 | static struct kmod_config_iter *kmod_config_iter_new(const struct kmod_ctx* ctx, |
948 | enum config_type type) | |
949 | { | |
950 | struct kmod_config_iter *iter = calloc(1, sizeof(*iter)); | |
e7fc2c86 | 951 | const struct kmod_config *config = kmod_get_config(ctx); |
00178629 LDM |
952 | |
953 | if (iter == NULL) | |
954 | return NULL; | |
955 | ||
956 | iter->type = type; | |
957 | ||
958 | switch (type) { | |
959 | case CONFIG_TYPE_BLACKLIST: | |
e7fc2c86 | 960 | iter->list = config->blacklists; |
00178629 LDM |
961 | iter->get_key = kmod_blacklist_get_modname; |
962 | break; | |
963 | case CONFIG_TYPE_INSTALL: | |
e7fc2c86 | 964 | iter->list = config->install_commands; |
00178629 LDM |
965 | iter->get_key = kmod_command_get_modname; |
966 | iter->get_value = kmod_command_get_command; | |
967 | break; | |
968 | case CONFIG_TYPE_REMOVE: | |
e7fc2c86 | 969 | iter->list = config->remove_commands; |
00178629 LDM |
970 | iter->get_key = kmod_command_get_modname; |
971 | iter->get_value = kmod_command_get_command; | |
972 | break; | |
973 | case CONFIG_TYPE_ALIAS: | |
e7fc2c86 | 974 | iter->list = config->aliases; |
00178629 LDM |
975 | iter->get_key = kmod_alias_get_name; |
976 | iter->get_value = kmod_alias_get_modname; | |
977 | break; | |
978 | case CONFIG_TYPE_OPTION: | |
e7fc2c86 | 979 | iter->list = config->options; |
00178629 LDM |
980 | iter->get_key = kmod_option_get_modname; |
981 | iter->get_value = kmod_option_get_options; | |
982 | break; | |
983 | case CONFIG_TYPE_SOFTDEP: | |
e7fc2c86 | 984 | iter->list = config->softdeps; |
00178629 | 985 | iter->get_key = kmod_softdep_get_name; |
6b04ef32 LDM |
986 | iter->get_value = softdep_get_plain_softdep; |
987 | iter->intermediate = true; | |
00178629 LDM |
988 | break; |
989 | } | |
990 | ||
991 | return iter; | |
992 | } | |
993 | ||
2f47c7fa LDM |
994 | /** |
995 | * SECTION:libkmod-config | |
996 | * @short_description: retrieve current libkmod configuration | |
997 | */ | |
998 | ||
999 | /** | |
1000 | * kmod_config_get_blacklists: | |
1001 | * @ctx: kmod library context | |
1002 | * | |
1003 | * Retrieve an iterator to deal with the blacklist maintained inside the | |
1004 | * library. See kmod_config_iter_get_key(), kmod_config_iter_get_value() and | |
1005 | * kmod_config_iter_next(). At least one call to kmod_config_iter_next() must | |
1006 | * be made to initialize the iterator and check if it's valid. | |
1007 | * | |
883d8c42 | 1008 | * Returns: a new iterator over the blacklists or NULL on failure. Free it |
2f47c7fa LDM |
1009 | * with kmod_config_iter_free_iter(). |
1010 | */ | |
00178629 LDM |
1011 | KMOD_EXPORT struct kmod_config_iter *kmod_config_get_blacklists(const struct kmod_ctx *ctx) |
1012 | { | |
1013 | if (ctx == NULL) | |
1014 | return NULL;; | |
1015 | ||
1016 | return kmod_config_iter_new(ctx, CONFIG_TYPE_BLACKLIST); | |
1017 | } | |
1018 | ||
2f47c7fa LDM |
1019 | /** |
1020 | * kmod_config_get_install_commands: | |
1021 | * @ctx: kmod library context | |
1022 | * | |
1023 | * Retrieve an iterator to deal with the install commands maintained inside the | |
1024 | * library. See kmod_config_iter_get_key(), kmod_config_iter_get_value() and | |
1025 | * kmod_config_iter_next(). At least one call to kmod_config_iter_next() must | |
1026 | * be made to initialize the iterator and check if it's valid. | |
1027 | * | |
883d8c42 | 1028 | * Returns: a new iterator over the install commands or NULL on failure. Free |
2f47c7fa LDM |
1029 | * it with kmod_config_iter_free_iter(). |
1030 | */ | |
00178629 LDM |
1031 | KMOD_EXPORT struct kmod_config_iter *kmod_config_get_install_commands(const struct kmod_ctx *ctx) |
1032 | { | |
1033 | if (ctx == NULL) | |
1034 | return NULL;; | |
1035 | ||
1036 | return kmod_config_iter_new(ctx, CONFIG_TYPE_INSTALL); | |
1037 | } | |
1038 | ||
2f47c7fa LDM |
1039 | /** |
1040 | * kmod_config_get_remove_commands: | |
1041 | * @ctx: kmod library context | |
1042 | * | |
1043 | * Retrieve an iterator to deal with the remove commands maintained inside the | |
1044 | * library. See kmod_config_iter_get_key(), kmod_config_iter_get_value() and | |
1045 | * kmod_config_iter_next(). At least one call to kmod_config_iter_next() must | |
1046 | * be made to initialize the iterator and check if it's valid. | |
1047 | * | |
883d8c42 | 1048 | * Returns: a new iterator over the remove commands or NULL on failure. Free |
2f47c7fa LDM |
1049 | * it with kmod_config_iter_free_iter(). |
1050 | */ | |
00178629 LDM |
1051 | KMOD_EXPORT struct kmod_config_iter *kmod_config_get_remove_commands(const struct kmod_ctx *ctx) |
1052 | { | |
1053 | if (ctx == NULL) | |
1054 | return NULL;; | |
1055 | ||
1056 | return kmod_config_iter_new(ctx, CONFIG_TYPE_REMOVE); | |
1057 | } | |
1058 | ||
2f47c7fa LDM |
1059 | /** |
1060 | * kmod_config_get_aliases: | |
1061 | * @ctx: kmod library context | |
1062 | * | |
1063 | * Retrieve an iterator to deal with the aliases maintained inside the | |
1064 | * library. See kmod_config_iter_get_key(), kmod_config_iter_get_value() and | |
1065 | * kmod_config_iter_next(). At least one call to kmod_config_iter_next() must | |
1066 | * be made to initialize the iterator and check if it's valid. | |
1067 | * | |
883d8c42 | 1068 | * Returns: a new iterator over the aliases or NULL on failure. Free it with |
2f47c7fa LDM |
1069 | * kmod_config_iter_free_iter(). |
1070 | */ | |
00178629 LDM |
1071 | KMOD_EXPORT struct kmod_config_iter *kmod_config_get_aliases(const struct kmod_ctx *ctx) |
1072 | { | |
1073 | if (ctx == NULL) | |
1074 | return NULL;; | |
1075 | ||
1076 | return kmod_config_iter_new(ctx, CONFIG_TYPE_ALIAS); | |
1077 | } | |
1078 | ||
2f47c7fa LDM |
1079 | /** |
1080 | * kmod_config_get_options: | |
1081 | * @ctx: kmod library context | |
1082 | * | |
1083 | * Retrieve an iterator to deal with the options maintained inside the | |
1084 | * library. See kmod_config_iter_get_key(), kmod_config_iter_get_value() and | |
1085 | * kmod_config_iter_next(). At least one call to kmod_config_iter_next() must | |
1086 | * be made to initialize the iterator and check if it's valid. | |
1087 | * | |
883d8c42 | 1088 | * Returns: a new iterator over the options or NULL on failure. Free it with |
2f47c7fa LDM |
1089 | * kmod_config_iter_free_iter(). |
1090 | */ | |
00178629 LDM |
1091 | KMOD_EXPORT struct kmod_config_iter *kmod_config_get_options(const struct kmod_ctx *ctx) |
1092 | { | |
1093 | if (ctx == NULL) | |
1094 | return NULL;; | |
1095 | ||
1096 | return kmod_config_iter_new(ctx, CONFIG_TYPE_OPTION); | |
1097 | } | |
1098 | ||
2f47c7fa LDM |
1099 | /** |
1100 | * kmod_config_get_softdeps: | |
1101 | * @ctx: kmod library context | |
1102 | * | |
1103 | * Retrieve an iterator to deal with the softdeps maintained inside the | |
1104 | * library. See kmod_config_iter_get_key(), kmod_config_iter_get_value() and | |
1105 | * kmod_config_iter_next(). At least one call to kmod_config_iter_next() must | |
1106 | * be made to initialize the iterator and check if it's valid. | |
1107 | * | |
883d8c42 | 1108 | * Returns: a new iterator over the softdeps or NULL on failure. Free it with |
2f47c7fa LDM |
1109 | * kmod_config_iter_free_iter(). |
1110 | */ | |
00178629 LDM |
1111 | KMOD_EXPORT struct kmod_config_iter *kmod_config_get_softdeps(const struct kmod_ctx *ctx) |
1112 | { | |
1113 | if (ctx == NULL) | |
1114 | return NULL;; | |
1115 | ||
1116 | return kmod_config_iter_new(ctx, CONFIG_TYPE_SOFTDEP); | |
1117 | } | |
1118 | ||
2f47c7fa LDM |
1119 | /** |
1120 | * kmod_config_iter_get_key: | |
1121 | * @iter: iterator over a certain configuration | |
1122 | * | |
1123 | * When using a new allocated iterator, user must perform a call to | |
1124 | * kmod_config_iter_next() to initialize iterator's position and check if it's | |
1125 | * valid. | |
1126 | * | |
1127 | * Returns: the key of the current configuration pointed by @iter. | |
1128 | */ | |
00178629 LDM |
1129 | KMOD_EXPORT const char *kmod_config_iter_get_key(const struct kmod_config_iter *iter) |
1130 | { | |
1131 | if (iter == NULL || iter->curr == NULL) | |
1132 | return NULL; | |
1133 | ||
1134 | return iter->get_key(iter->curr); | |
1135 | } | |
1136 | ||
2f47c7fa LDM |
1137 | /** |
1138 | * kmod_config_iter_get_value: | |
1139 | * @iter: iterator over a certain configuration | |
1140 | * | |
1141 | * When using a new allocated iterator, user must perform a call to | |
1142 | * kmod_config_iter_next() to initialize iterator's position and check if it's | |
1143 | * valid. | |
1144 | * | |
1145 | * Returns: the value of the current configuration pointed by @iter. | |
1146 | */ | |
00178629 LDM |
1147 | KMOD_EXPORT const char *kmod_config_iter_get_value(const struct kmod_config_iter *iter) |
1148 | { | |
6b04ef32 LDM |
1149 | const char *s; |
1150 | ||
00178629 LDM |
1151 | if (iter == NULL || iter->curr == NULL) |
1152 | return NULL; | |
1153 | ||
1154 | if (iter->get_value == NULL) | |
1155 | return NULL; | |
1156 | ||
6b04ef32 LDM |
1157 | if (iter->intermediate) { |
1158 | struct kmod_config_iter *i = (struct kmod_config_iter *)iter; | |
1159 | ||
1160 | free(i->data); | |
1161 | s = i->data = (void *) iter->get_value(iter->curr); | |
1162 | } else | |
1163 | s = iter->get_value(iter->curr); | |
1164 | ||
1165 | return s; | |
00178629 LDM |
1166 | } |
1167 | ||
2f47c7fa LDM |
1168 | /** |
1169 | * kmod_config_iter_next: | |
1170 | * @iter: iterator over a certain configuration | |
1171 | * | |
1172 | * Make @iter point to the next item of a certain configuration. It's an | |
1173 | * automatically recycling iterator. When it reaches the end, false is | |
1174 | * returned; then if user wants to iterate again, it's sufficient to call this | |
1175 | * function once more. | |
1176 | * | |
1177 | * Returns: true if next position of @iter is valid or false if its end is | |
1178 | * reached. | |
1179 | */ | |
00178629 LDM |
1180 | KMOD_EXPORT bool kmod_config_iter_next(struct kmod_config_iter *iter) |
1181 | { | |
1182 | if (iter == NULL) | |
1183 | return false; | |
1184 | ||
1185 | if (iter->curr == NULL) { | |
1186 | iter->curr = iter->list; | |
1187 | return iter->curr != NULL; | |
1188 | } | |
1189 | ||
1190 | iter->curr = kmod_list_next(iter->list, iter->curr); | |
1191 | ||
1192 | return iter->curr != NULL; | |
1193 | } | |
1194 | ||
2f47c7fa LDM |
1195 | /** |
1196 | * kmod_config_iter_free_iter: | |
1197 | * @iter: iterator over a certain configuration | |
1198 | * | |
1199 | * Free resources used by the iterator. | |
1200 | */ | |
00178629 LDM |
1201 | KMOD_EXPORT void kmod_config_iter_free_iter(struct kmod_config_iter *iter) |
1202 | { | |
6b04ef32 | 1203 | free(iter->data); |
00178629 LDM |
1204 | free(iter); |
1205 | } |