]>
Commit | Line | Data |
---|---|---|
663996b3 MS |
1 | /* |
2 | * Copyright (C) 2003-2012 Kay Sievers <kay@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 <stddef.h> | |
19 | #include <limits.h> | |
20 | #include <stdlib.h> | |
21 | #include <stdbool.h> | |
22 | #include <string.h> | |
23 | #include <stdio.h> | |
24 | #include <fcntl.h> | |
25 | #include <ctype.h> | |
26 | #include <unistd.h> | |
27 | #include <errno.h> | |
28 | #include <dirent.h> | |
29 | #include <fnmatch.h> | |
30 | #include <time.h> | |
31 | ||
32 | #include "udev.h" | |
33 | #include "path-util.h" | |
34 | #include "conf-files.h" | |
35 | #include "strbuf.h" | |
14228c0d MB |
36 | #include "strv.h" |
37 | #include "util.h" | |
663996b3 MS |
38 | |
39 | #define PREALLOC_TOKEN 2048 | |
40 | ||
41 | struct uid_gid { | |
42 | unsigned int name_off; | |
43 | union { | |
44 | uid_t uid; | |
45 | gid_t gid; | |
46 | }; | |
47 | }; | |
48 | ||
60f067b4 JS |
49 | static const char* const rules_dirs[] = { |
50 | "/etc/udev/rules.d", | |
51 | "/run/udev/rules.d", | |
52 | UDEVLIBEXECDIR "/rules.d", | |
53 | NULL}; | |
54 | ||
663996b3 MS |
55 | struct udev_rules { |
56 | struct udev *udev; | |
60f067b4 | 57 | usec_t dirs_ts_usec; |
663996b3 MS |
58 | int resolve_names; |
59 | ||
60 | /* every key in the rules file becomes a token */ | |
61 | struct token *tokens; | |
62 | unsigned int token_cur; | |
63 | unsigned int token_max; | |
64 | ||
65 | /* all key strings are copied and de-duplicated in a single continuous string buffer */ | |
66 | struct strbuf *strbuf; | |
67 | ||
68 | /* during rule parsing, uid/gid lookup results are cached */ | |
69 | struct uid_gid *uids; | |
70 | unsigned int uids_cur; | |
71 | unsigned int uids_max; | |
72 | struct uid_gid *gids; | |
73 | unsigned int gids_cur; | |
74 | unsigned int gids_max; | |
75 | }; | |
76 | ||
77 | static char *rules_str(struct udev_rules *rules, unsigned int off) { | |
78 | return rules->strbuf->buf + off; | |
79 | } | |
80 | ||
81 | static unsigned int rules_add_string(struct udev_rules *rules, const char *s) { | |
82 | return strbuf_add_string(rules->strbuf, s, strlen(s)); | |
83 | } | |
84 | ||
85 | /* KEY=="", KEY!="", KEY+="", KEY="", KEY:="" */ | |
86 | enum operation_type { | |
87 | OP_UNSET, | |
88 | ||
89 | OP_MATCH, | |
90 | OP_NOMATCH, | |
91 | OP_MATCH_MAX, | |
92 | ||
93 | OP_ADD, | |
94 | OP_ASSIGN, | |
95 | OP_ASSIGN_FINAL, | |
96 | }; | |
97 | ||
98 | enum string_glob_type { | |
99 | GL_UNSET, | |
100 | GL_PLAIN, /* no special chars */ | |
101 | GL_GLOB, /* shell globs ?,*,[] */ | |
102 | GL_SPLIT, /* multi-value A|B */ | |
103 | GL_SPLIT_GLOB, /* multi-value with glob A*|B* */ | |
104 | GL_SOMETHING, /* commonly used "?*" */ | |
105 | }; | |
106 | ||
107 | enum string_subst_type { | |
108 | SB_UNSET, | |
109 | SB_NONE, | |
110 | SB_FORMAT, | |
111 | SB_SUBSYS, | |
112 | }; | |
113 | ||
114 | /* tokens of a rule are sorted/handled in this order */ | |
115 | enum token_type { | |
116 | TK_UNSET, | |
117 | TK_RULE, | |
118 | ||
119 | TK_M_ACTION, /* val */ | |
120 | TK_M_DEVPATH, /* val */ | |
121 | TK_M_KERNEL, /* val */ | |
122 | TK_M_DEVLINK, /* val */ | |
123 | TK_M_NAME, /* val */ | |
124 | TK_M_ENV, /* val, attr */ | |
125 | TK_M_TAG, /* val */ | |
126 | TK_M_SUBSYSTEM, /* val */ | |
127 | TK_M_DRIVER, /* val */ | |
128 | TK_M_WAITFOR, /* val */ | |
129 | TK_M_ATTR, /* val, attr */ | |
130 | ||
131 | TK_M_PARENTS_MIN, | |
132 | TK_M_KERNELS, /* val */ | |
133 | TK_M_SUBSYSTEMS, /* val */ | |
134 | TK_M_DRIVERS, /* val */ | |
135 | TK_M_ATTRS, /* val, attr */ | |
136 | TK_M_TAGS, /* val */ | |
137 | TK_M_PARENTS_MAX, | |
138 | ||
139 | TK_M_TEST, /* val, mode_t */ | |
140 | TK_M_EVENT_TIMEOUT, /* int */ | |
141 | TK_M_PROGRAM, /* val */ | |
142 | TK_M_IMPORT_FILE, /* val */ | |
143 | TK_M_IMPORT_PROG, /* val */ | |
144 | TK_M_IMPORT_BUILTIN, /* val */ | |
145 | TK_M_IMPORT_DB, /* val */ | |
146 | TK_M_IMPORT_CMDLINE, /* val */ | |
147 | TK_M_IMPORT_PARENT, /* val */ | |
148 | TK_M_RESULT, /* val */ | |
149 | TK_M_MAX, | |
150 | ||
151 | TK_A_STRING_ESCAPE_NONE, | |
152 | TK_A_STRING_ESCAPE_REPLACE, | |
153 | TK_A_DB_PERSIST, | |
154 | TK_A_INOTIFY_WATCH, /* int */ | |
155 | TK_A_DEVLINK_PRIO, /* int */ | |
156 | TK_A_OWNER, /* val */ | |
157 | TK_A_GROUP, /* val */ | |
158 | TK_A_MODE, /* val */ | |
159 | TK_A_OWNER_ID, /* uid_t */ | |
160 | TK_A_GROUP_ID, /* gid_t */ | |
161 | TK_A_MODE_ID, /* mode_t */ | |
14228c0d | 162 | TK_A_TAG, /* val */ |
663996b3 | 163 | TK_A_STATIC_NODE, /* val */ |
60f067b4 | 164 | TK_A_SECLABEL, /* val, attr */ |
663996b3 | 165 | TK_A_ENV, /* val, attr */ |
663996b3 MS |
166 | TK_A_NAME, /* val */ |
167 | TK_A_DEVLINK, /* val */ | |
168 | TK_A_ATTR, /* val, attr */ | |
169 | TK_A_RUN_BUILTIN, /* val, bool */ | |
170 | TK_A_RUN_PROGRAM, /* val, bool */ | |
171 | TK_A_GOTO, /* size_t */ | |
172 | ||
173 | TK_END, | |
174 | }; | |
175 | ||
176 | /* we try to pack stuff in a way that we take only 12 bytes per token */ | |
177 | struct token { | |
178 | union { | |
179 | unsigned char type; /* same in rule and key */ | |
180 | struct { | |
181 | enum token_type type:8; | |
182 | bool can_set_name:1; | |
183 | bool has_static_node:1; | |
184 | unsigned int unused:6; | |
185 | unsigned short token_count; | |
186 | unsigned int label_off; | |
187 | unsigned short filename_off; | |
188 | unsigned short filename_line; | |
189 | } rule; | |
190 | struct { | |
191 | enum token_type type:8; | |
192 | enum operation_type op:8; | |
193 | enum string_glob_type glob:8; | |
194 | enum string_subst_type subst:4; | |
195 | enum string_subst_type attrsubst:4; | |
196 | unsigned int value_off; | |
197 | union { | |
198 | unsigned int attr_off; | |
199 | unsigned int rule_goto; | |
200 | mode_t mode; | |
201 | uid_t uid; | |
202 | gid_t gid; | |
203 | int devlink_prio; | |
204 | int event_timeout; | |
205 | int watch; | |
206 | enum udev_builtin_cmd builtin_cmd; | |
207 | }; | |
208 | } key; | |
209 | }; | |
210 | }; | |
211 | ||
212 | #define MAX_TK 64 | |
213 | struct rule_tmp { | |
214 | struct udev_rules *rules; | |
215 | struct token rule; | |
216 | struct token token[MAX_TK]; | |
217 | unsigned int token_cur; | |
218 | }; | |
219 | ||
220 | #ifdef DEBUG | |
221 | static const char *operation_str(enum operation_type type) | |
222 | { | |
223 | static const char *operation_strs[] = { | |
224 | [OP_UNSET] = "UNSET", | |
225 | [OP_MATCH] = "match", | |
226 | [OP_NOMATCH] = "nomatch", | |
227 | [OP_MATCH_MAX] = "MATCH_MAX", | |
228 | ||
229 | [OP_ADD] = "add", | |
230 | [OP_ASSIGN] = "assign", | |
231 | [OP_ASSIGN_FINAL] = "assign-final", | |
232 | } ; | |
233 | ||
234 | return operation_strs[type]; | |
235 | } | |
236 | ||
237 | static const char *string_glob_str(enum string_glob_type type) | |
238 | { | |
239 | static const char *string_glob_strs[] = { | |
240 | [GL_UNSET] = "UNSET", | |
241 | [GL_PLAIN] = "plain", | |
242 | [GL_GLOB] = "glob", | |
243 | [GL_SPLIT] = "split", | |
244 | [GL_SPLIT_GLOB] = "split-glob", | |
245 | [GL_SOMETHING] = "split-glob", | |
246 | }; | |
247 | ||
248 | return string_glob_strs[type]; | |
249 | } | |
250 | ||
251 | static const char *token_str(enum token_type type) | |
252 | { | |
253 | static const char *token_strs[] = { | |
254 | [TK_UNSET] = "UNSET", | |
255 | [TK_RULE] = "RULE", | |
256 | ||
257 | [TK_M_ACTION] = "M ACTION", | |
258 | [TK_M_DEVPATH] = "M DEVPATH", | |
259 | [TK_M_KERNEL] = "M KERNEL", | |
260 | [TK_M_DEVLINK] = "M DEVLINK", | |
261 | [TK_M_NAME] = "M NAME", | |
262 | [TK_M_ENV] = "M ENV", | |
263 | [TK_M_TAG] = "M TAG", | |
264 | [TK_M_SUBSYSTEM] = "M SUBSYSTEM", | |
265 | [TK_M_DRIVER] = "M DRIVER", | |
266 | [TK_M_WAITFOR] = "M WAITFOR", | |
267 | [TK_M_ATTR] = "M ATTR", | |
268 | ||
269 | [TK_M_PARENTS_MIN] = "M PARENTS_MIN", | |
270 | [TK_M_KERNELS] = "M KERNELS", | |
271 | [TK_M_SUBSYSTEMS] = "M SUBSYSTEMS", | |
272 | [TK_M_DRIVERS] = "M DRIVERS", | |
273 | [TK_M_ATTRS] = "M ATTRS", | |
274 | [TK_M_TAGS] = "M TAGS", | |
275 | [TK_M_PARENTS_MAX] = "M PARENTS_MAX", | |
276 | ||
277 | [TK_M_TEST] = "M TEST", | |
278 | [TK_M_EVENT_TIMEOUT] = "M EVENT_TIMEOUT", | |
279 | [TK_M_PROGRAM] = "M PROGRAM", | |
280 | [TK_M_IMPORT_FILE] = "M IMPORT_FILE", | |
281 | [TK_M_IMPORT_PROG] = "M IMPORT_PROG", | |
282 | [TK_M_IMPORT_BUILTIN] = "M IMPORT_BUILTIN", | |
283 | [TK_M_IMPORT_DB] = "M IMPORT_DB", | |
284 | [TK_M_IMPORT_CMDLINE] = "M IMPORT_CMDLINE", | |
285 | [TK_M_IMPORT_PARENT] = "M IMPORT_PARENT", | |
286 | [TK_M_RESULT] = "M RESULT", | |
287 | [TK_M_MAX] = "M MAX", | |
288 | ||
289 | [TK_A_STRING_ESCAPE_NONE] = "A STRING_ESCAPE_NONE", | |
290 | [TK_A_STRING_ESCAPE_REPLACE] = "A STRING_ESCAPE_REPLACE", | |
291 | [TK_A_DB_PERSIST] = "A DB_PERSIST", | |
292 | [TK_A_INOTIFY_WATCH] = "A INOTIFY_WATCH", | |
293 | [TK_A_DEVLINK_PRIO] = "A DEVLINK_PRIO", | |
294 | [TK_A_OWNER] = "A OWNER", | |
295 | [TK_A_GROUP] = "A GROUP", | |
296 | [TK_A_MODE] = "A MODE", | |
297 | [TK_A_OWNER_ID] = "A OWNER_ID", | |
298 | [TK_A_GROUP_ID] = "A GROUP_ID", | |
299 | [TK_A_STATIC_NODE] = "A STATIC_NODE", | |
60f067b4 | 300 | [TK_A_SECLABEL] = "A SECLABEL", |
663996b3 MS |
301 | [TK_A_MODE_ID] = "A MODE_ID", |
302 | [TK_A_ENV] = "A ENV", | |
303 | [TK_A_TAG] = "A ENV", | |
304 | [TK_A_NAME] = "A NAME", | |
305 | [TK_A_DEVLINK] = "A DEVLINK", | |
306 | [TK_A_ATTR] = "A ATTR", | |
307 | [TK_A_RUN_BUILTIN] = "A RUN_BUILTIN", | |
308 | [TK_A_RUN_PROGRAM] = "A RUN_PROGRAM", | |
309 | [TK_A_GOTO] = "A GOTO", | |
310 | ||
311 | [TK_END] = "END", | |
312 | }; | |
313 | ||
314 | return token_strs[type]; | |
315 | } | |
316 | ||
317 | static void dump_token(struct udev_rules *rules, struct token *token) | |
318 | { | |
319 | enum token_type type = token->type; | |
320 | enum operation_type op = token->key.op; | |
321 | enum string_glob_type glob = token->key.glob; | |
322 | const char *value = str(rules, token->key.value_off); | |
323 | const char *attr = &rules->buf[token->key.attr_off]; | |
324 | ||
325 | switch (type) { | |
326 | case TK_RULE: | |
327 | { | |
328 | const char *tks_ptr = (char *)rules->tokens; | |
329 | const char *tk_ptr = (char *)token; | |
330 | unsigned int idx = (tk_ptr - tks_ptr) / sizeof(struct token); | |
331 | ||
60f067b4 | 332 | log_debug("* RULE %s:%u, token: %u, count: %u, label: '%s'", |
663996b3 MS |
333 | &rules->buf[token->rule.filename_off], token->rule.filename_line, |
334 | idx, token->rule.token_count, | |
335 | &rules->buf[token->rule.label_off]); | |
336 | break; | |
337 | } | |
338 | case TK_M_ACTION: | |
339 | case TK_M_DEVPATH: | |
340 | case TK_M_KERNEL: | |
341 | case TK_M_SUBSYSTEM: | |
342 | case TK_M_DRIVER: | |
343 | case TK_M_WAITFOR: | |
344 | case TK_M_DEVLINK: | |
345 | case TK_M_NAME: | |
346 | case TK_M_KERNELS: | |
347 | case TK_M_SUBSYSTEMS: | |
348 | case TK_M_DRIVERS: | |
349 | case TK_M_TAGS: | |
350 | case TK_M_PROGRAM: | |
351 | case TK_M_IMPORT_FILE: | |
352 | case TK_M_IMPORT_PROG: | |
353 | case TK_M_IMPORT_DB: | |
354 | case TK_M_IMPORT_CMDLINE: | |
355 | case TK_M_IMPORT_PARENT: | |
356 | case TK_M_RESULT: | |
357 | case TK_A_NAME: | |
358 | case TK_A_DEVLINK: | |
359 | case TK_A_OWNER: | |
360 | case TK_A_GROUP: | |
361 | case TK_A_MODE: | |
362 | case TK_A_RUN_BUILTIN: | |
363 | case TK_A_RUN_PROGRAM: | |
60f067b4 | 364 | log_debug("%s %s '%s'(%s)", |
663996b3 MS |
365 | token_str(type), operation_str(op), value, string_glob_str(glob)); |
366 | break; | |
367 | case TK_M_IMPORT_BUILTIN: | |
60f067b4 | 368 | log_debug("%s %i '%s'", token_str(type), token->key.builtin_cmd, value); |
663996b3 MS |
369 | break; |
370 | case TK_M_ATTR: | |
371 | case TK_M_ATTRS: | |
372 | case TK_M_ENV: | |
373 | case TK_A_ATTR: | |
374 | case TK_A_ENV: | |
60f067b4 | 375 | log_debug("%s %s '%s' '%s'(%s)", |
663996b3 MS |
376 | token_str(type), operation_str(op), attr, value, string_glob_str(glob)); |
377 | break; | |
378 | case TK_M_TAG: | |
379 | case TK_A_TAG: | |
60f067b4 | 380 | log_debug("%s %s '%s'", token_str(type), operation_str(op), value); |
663996b3 MS |
381 | break; |
382 | case TK_A_STRING_ESCAPE_NONE: | |
383 | case TK_A_STRING_ESCAPE_REPLACE: | |
384 | case TK_A_DB_PERSIST: | |
60f067b4 | 385 | log_debug("%s", token_str(type)); |
663996b3 MS |
386 | break; |
387 | case TK_M_TEST: | |
60f067b4 | 388 | log_debug("%s %s '%s'(%s) %#o", |
663996b3 MS |
389 | token_str(type), operation_str(op), value, string_glob_str(glob), token->key.mode); |
390 | break; | |
391 | case TK_A_INOTIFY_WATCH: | |
60f067b4 | 392 | log_debug("%s %u", token_str(type), token->key.watch); |
663996b3 MS |
393 | break; |
394 | case TK_A_DEVLINK_PRIO: | |
60f067b4 | 395 | log_debug("%s %u", token_str(type), token->key.devlink_prio); |
663996b3 MS |
396 | break; |
397 | case TK_A_OWNER_ID: | |
60f067b4 | 398 | log_debug("%s %s %u", token_str(type), operation_str(op), token->key.uid); |
663996b3 MS |
399 | break; |
400 | case TK_A_GROUP_ID: | |
60f067b4 | 401 | log_debug("%s %s %u", token_str(type), operation_str(op), token->key.gid); |
663996b3 MS |
402 | break; |
403 | case TK_A_MODE_ID: | |
60f067b4 | 404 | log_debug("%s %s %#o", token_str(type), operation_str(op), token->key.mode); |
663996b3 MS |
405 | break; |
406 | case TK_A_STATIC_NODE: | |
60f067b4 JS |
407 | log_debug("%s '%s'", token_str(type), value); |
408 | break; | |
409 | case TK_A_SECLABEL: | |
410 | log_debug("%s %s '%s' '%s'", token_str(type), operation_str(op), attr, value); | |
663996b3 MS |
411 | break; |
412 | case TK_M_EVENT_TIMEOUT: | |
60f067b4 | 413 | log_debug("%s %u", token_str(type), token->key.event_timeout); |
663996b3 MS |
414 | break; |
415 | case TK_A_GOTO: | |
60f067b4 | 416 | log_debug("%s '%s' %u", token_str(type), value, token->key.rule_goto); |
663996b3 MS |
417 | break; |
418 | case TK_END: | |
60f067b4 | 419 | log_debug("* %s", token_str(type)); |
663996b3 MS |
420 | break; |
421 | case TK_M_PARENTS_MIN: | |
422 | case TK_M_PARENTS_MAX: | |
423 | case TK_M_MAX: | |
424 | case TK_UNSET: | |
60f067b4 | 425 | log_debug("unknown type %u", type); |
663996b3 MS |
426 | break; |
427 | } | |
428 | } | |
429 | ||
430 | static void dump_rules(struct udev_rules *rules) | |
431 | { | |
432 | unsigned int i; | |
433 | ||
60f067b4 | 434 | log_debug("dumping %u (%zu bytes) tokens, %u (%zu bytes) strings", |
663996b3 MS |
435 | rules->token_cur, |
436 | rules->token_cur * sizeof(struct token), | |
437 | rules->buf_count, | |
438 | rules->buf_cur); | |
60f067b4 | 439 | for (i = 0; i < rules->token_cur; i++) |
663996b3 MS |
440 | dump_token(rules, &rules->tokens[i]); |
441 | } | |
442 | #else | |
663996b3 MS |
443 | static inline void dump_token(struct udev_rules *rules, struct token *token) {} |
444 | static inline void dump_rules(struct udev_rules *rules) {} | |
445 | #endif /* DEBUG */ | |
446 | ||
447 | static int add_token(struct udev_rules *rules, struct token *token) | |
448 | { | |
449 | /* grow buffer if needed */ | |
450 | if (rules->token_cur+1 >= rules->token_max) { | |
451 | struct token *tokens; | |
452 | unsigned int add; | |
453 | ||
454 | /* double the buffer size */ | |
455 | add = rules->token_max; | |
456 | if (add < 8) | |
457 | add = 8; | |
458 | ||
459 | tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token)); | |
460 | if (tokens == NULL) | |
461 | return -1; | |
462 | rules->tokens = tokens; | |
463 | rules->token_max += add; | |
464 | } | |
465 | memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token)); | |
466 | rules->token_cur++; | |
467 | return 0; | |
468 | } | |
469 | ||
470 | static uid_t add_uid(struct udev_rules *rules, const char *owner) | |
471 | { | |
472 | unsigned int i; | |
473 | uid_t uid; | |
474 | unsigned int off; | |
475 | ||
476 | /* lookup, if we know it already */ | |
477 | for (i = 0; i < rules->uids_cur; i++) { | |
478 | off = rules->uids[i].name_off; | |
479 | if (streq(rules_str(rules, off), owner)) { | |
480 | uid = rules->uids[i].uid; | |
481 | return uid; | |
482 | } | |
483 | } | |
484 | uid = util_lookup_user(rules->udev, owner); | |
485 | ||
486 | /* grow buffer if needed */ | |
487 | if (rules->uids_cur+1 >= rules->uids_max) { | |
488 | struct uid_gid *uids; | |
489 | unsigned int add; | |
490 | ||
491 | /* double the buffer size */ | |
492 | add = rules->uids_max; | |
493 | if (add < 1) | |
494 | add = 8; | |
495 | ||
496 | uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid)); | |
497 | if (uids == NULL) | |
498 | return uid; | |
499 | rules->uids = uids; | |
500 | rules->uids_max += add; | |
501 | } | |
502 | rules->uids[rules->uids_cur].uid = uid; | |
503 | off = rules_add_string(rules, owner); | |
504 | if (off <= 0) | |
505 | return uid; | |
506 | rules->uids[rules->uids_cur].name_off = off; | |
507 | rules->uids_cur++; | |
508 | return uid; | |
509 | } | |
510 | ||
511 | static gid_t add_gid(struct udev_rules *rules, const char *group) | |
512 | { | |
513 | unsigned int i; | |
514 | gid_t gid; | |
515 | unsigned int off; | |
516 | ||
517 | /* lookup, if we know it already */ | |
518 | for (i = 0; i < rules->gids_cur; i++) { | |
519 | off = rules->gids[i].name_off; | |
520 | if (streq(rules_str(rules, off), group)) { | |
521 | gid = rules->gids[i].gid; | |
522 | return gid; | |
523 | } | |
524 | } | |
525 | gid = util_lookup_group(rules->udev, group); | |
526 | ||
527 | /* grow buffer if needed */ | |
528 | if (rules->gids_cur+1 >= rules->gids_max) { | |
529 | struct uid_gid *gids; | |
530 | unsigned int add; | |
531 | ||
532 | /* double the buffer size */ | |
533 | add = rules->gids_max; | |
534 | if (add < 1) | |
535 | add = 8; | |
536 | ||
537 | gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid)); | |
538 | if (gids == NULL) | |
539 | return gid; | |
540 | rules->gids = gids; | |
541 | rules->gids_max += add; | |
542 | } | |
543 | rules->gids[rules->gids_cur].gid = gid; | |
544 | off = rules_add_string(rules, group); | |
545 | if (off <= 0) | |
546 | return gid; | |
547 | rules->gids[rules->gids_cur].name_off = off; | |
548 | rules->gids_cur++; | |
549 | return gid; | |
550 | } | |
551 | ||
552 | static int import_property_from_string(struct udev_device *dev, char *line) | |
553 | { | |
554 | char *key; | |
555 | char *val; | |
556 | size_t len; | |
60f067b4 | 557 | struct udev_list_entry *entry; |
663996b3 MS |
558 | |
559 | /* find key */ | |
560 | key = line; | |
561 | while (isspace(key[0])) | |
562 | key++; | |
563 | ||
564 | /* comment or empty line */ | |
565 | if (key[0] == '#' || key[0] == '\0') | |
566 | return -1; | |
567 | ||
568 | /* split key/value */ | |
569 | val = strchr(key, '='); | |
570 | if (val == NULL) | |
571 | return -1; | |
572 | val[0] = '\0'; | |
573 | val++; | |
574 | ||
575 | /* find value */ | |
576 | while (isspace(val[0])) | |
577 | val++; | |
578 | ||
579 | /* terminate key */ | |
580 | len = strlen(key); | |
581 | if (len == 0) | |
582 | return -1; | |
583 | while (isspace(key[len-1])) | |
584 | len--; | |
585 | key[len] = '\0'; | |
586 | ||
587 | /* terminate value */ | |
588 | len = strlen(val); | |
589 | if (len == 0) | |
590 | return -1; | |
591 | while (isspace(val[len-1])) | |
592 | len--; | |
593 | val[len] = '\0'; | |
594 | ||
595 | if (len == 0) | |
596 | return -1; | |
597 | ||
598 | /* unquote */ | |
599 | if (val[0] == '"' || val[0] == '\'') { | |
600 | if (val[len-1] != val[0]) { | |
60f067b4 | 601 | log_debug("inconsistent quoting: '%s', skip", line); |
663996b3 MS |
602 | return -1; |
603 | } | |
604 | val[len-1] = '\0'; | |
605 | val++; | |
606 | } | |
607 | ||
60f067b4 JS |
608 | entry = udev_device_add_property(dev, key, val); |
609 | /* store in db, skip private keys */ | |
610 | if (key[0] != '.') | |
611 | udev_list_entry_set_num(entry, true); | |
612 | ||
663996b3 MS |
613 | return 0; |
614 | } | |
615 | ||
616 | static int import_file_into_properties(struct udev_device *dev, const char *filename) | |
617 | { | |
618 | FILE *f; | |
619 | char line[UTIL_LINE_SIZE]; | |
620 | ||
621 | f = fopen(filename, "re"); | |
622 | if (f == NULL) | |
623 | return -1; | |
624 | while (fgets(line, sizeof(line), f) != NULL) | |
625 | import_property_from_string(dev, line); | |
626 | fclose(f); | |
627 | return 0; | |
628 | } | |
629 | ||
630 | static int import_program_into_properties(struct udev_event *event, const char *program, const sigset_t *sigmask) | |
631 | { | |
632 | struct udev_device *dev = event->dev; | |
633 | char **envp; | |
634 | char result[UTIL_LINE_SIZE]; | |
635 | char *line; | |
636 | int err; | |
637 | ||
638 | envp = udev_device_get_properties_envp(dev); | |
639 | err = udev_event_spawn(event, program, envp, sigmask, result, sizeof(result)); | |
640 | if (err < 0) | |
641 | return err; | |
642 | ||
643 | line = result; | |
644 | while (line != NULL) { | |
645 | char *pos; | |
646 | ||
647 | pos = strchr(line, '\n'); | |
648 | if (pos != NULL) { | |
649 | pos[0] = '\0'; | |
650 | pos = &pos[1]; | |
651 | } | |
652 | import_property_from_string(dev, line); | |
653 | line = pos; | |
654 | } | |
655 | return 0; | |
656 | } | |
657 | ||
658 | static int import_parent_into_properties(struct udev_device *dev, const char *filter) | |
659 | { | |
660 | struct udev_device *dev_parent; | |
661 | struct udev_list_entry *list_entry; | |
662 | ||
663 | dev_parent = udev_device_get_parent(dev); | |
664 | if (dev_parent == NULL) | |
665 | return -1; | |
666 | ||
667 | udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) { | |
668 | const char *key = udev_list_entry_get_name(list_entry); | |
669 | const char *val = udev_list_entry_get_value(list_entry); | |
670 | ||
671 | if (fnmatch(filter, key, 0) == 0) { | |
672 | struct udev_list_entry *entry; | |
673 | ||
674 | entry = udev_device_add_property(dev, key, val); | |
675 | /* store in db, skip private keys */ | |
676 | if (key[0] != '.') | |
677 | udev_list_entry_set_num(entry, true); | |
678 | } | |
679 | } | |
680 | return 0; | |
681 | } | |
682 | ||
683 | #define WAIT_LOOP_PER_SECOND 50 | |
684 | static int wait_for_file(struct udev_device *dev, const char *file, int timeout) | |
685 | { | |
686 | char filepath[UTIL_PATH_SIZE]; | |
687 | char devicepath[UTIL_PATH_SIZE]; | |
688 | struct stat stats; | |
689 | int loop = timeout * WAIT_LOOP_PER_SECOND; | |
690 | ||
691 | /* a relative path is a device attribute */ | |
692 | devicepath[0] = '\0'; | |
693 | if (file[0] != '/') { | |
694 | strscpyl(devicepath, sizeof(devicepath), udev_device_get_syspath(dev), NULL); | |
695 | strscpyl(filepath, sizeof(filepath), devicepath, "/", file, NULL); | |
696 | file = filepath; | |
697 | } | |
698 | ||
699 | while (--loop) { | |
700 | const struct timespec duration = { 0, 1000 * 1000 * 1000 / WAIT_LOOP_PER_SECOND }; | |
701 | ||
702 | /* lookup file */ | |
703 | if (stat(file, &stats) == 0) { | |
60f067b4 | 704 | log_debug("file '%s' appeared after %i loops", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1); |
663996b3 MS |
705 | return 0; |
706 | } | |
707 | /* make sure, the device did not disappear in the meantime */ | |
708 | if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) { | |
60f067b4 | 709 | log_debug("device disappeared while waiting for '%s'", file); |
663996b3 MS |
710 | return -2; |
711 | } | |
60f067b4 | 712 | log_debug("wait for '%s' for %i mseconds", file, 1000 / WAIT_LOOP_PER_SECOND); |
663996b3 MS |
713 | nanosleep(&duration, NULL); |
714 | } | |
60f067b4 | 715 | log_debug("waiting for '%s' failed", file); |
663996b3 MS |
716 | return -1; |
717 | } | |
718 | ||
719 | static int attr_subst_subdir(char *attr, size_t len) | |
720 | { | |
721 | bool found = false; | |
722 | ||
723 | if (strstr(attr, "/*/")) { | |
724 | char *pos; | |
725 | char dirname[UTIL_PATH_SIZE]; | |
726 | const char *tail; | |
727 | DIR *dir; | |
728 | ||
729 | strscpy(dirname, sizeof(dirname), attr); | |
730 | pos = strstr(dirname, "/*/"); | |
731 | if (pos == NULL) | |
732 | return -1; | |
733 | pos[0] = '\0'; | |
734 | tail = &pos[2]; | |
735 | dir = opendir(dirname); | |
736 | if (dir != NULL) { | |
737 | struct dirent *dent; | |
738 | ||
739 | for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) { | |
740 | struct stat stats; | |
741 | ||
742 | if (dent->d_name[0] == '.') | |
743 | continue; | |
744 | strscpyl(attr, len, dirname, "/", dent->d_name, tail, NULL); | |
745 | if (stat(attr, &stats) == 0) { | |
746 | found = true; | |
747 | break; | |
748 | } | |
749 | } | |
750 | closedir(dir); | |
751 | } | |
752 | } | |
753 | ||
754 | return found; | |
755 | } | |
756 | ||
757 | static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value) | |
758 | { | |
759 | char *linepos; | |
760 | char *temp; | |
761 | ||
762 | linepos = *line; | |
763 | if (linepos == NULL || linepos[0] == '\0') | |
764 | return -1; | |
765 | ||
766 | /* skip whitespace */ | |
767 | while (isspace(linepos[0]) || linepos[0] == ',') | |
768 | linepos++; | |
769 | ||
770 | /* get the key */ | |
771 | if (linepos[0] == '\0') | |
772 | return -1; | |
773 | *key = linepos; | |
774 | ||
775 | for (;;) { | |
776 | linepos++; | |
777 | if (linepos[0] == '\0') | |
778 | return -1; | |
779 | if (isspace(linepos[0])) | |
780 | break; | |
781 | if (linepos[0] == '=') | |
782 | break; | |
783 | if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':')) | |
784 | if (linepos[1] == '=') | |
785 | break; | |
786 | } | |
787 | ||
788 | /* remember end of key */ | |
789 | temp = linepos; | |
790 | ||
791 | /* skip whitespace after key */ | |
792 | while (isspace(linepos[0])) | |
793 | linepos++; | |
794 | if (linepos[0] == '\0') | |
795 | return -1; | |
796 | ||
797 | /* get operation type */ | |
798 | if (linepos[0] == '=' && linepos[1] == '=') { | |
799 | *op = OP_MATCH; | |
800 | linepos += 2; | |
801 | } else if (linepos[0] == '!' && linepos[1] == '=') { | |
802 | *op = OP_NOMATCH; | |
803 | linepos += 2; | |
804 | } else if (linepos[0] == '+' && linepos[1] == '=') { | |
805 | *op = OP_ADD; | |
806 | linepos += 2; | |
807 | } else if (linepos[0] == '=') { | |
808 | *op = OP_ASSIGN; | |
809 | linepos++; | |
810 | } else if (linepos[0] == ':' && linepos[1] == '=') { | |
811 | *op = OP_ASSIGN_FINAL; | |
812 | linepos += 2; | |
813 | } else | |
814 | return -1; | |
815 | ||
816 | /* terminate key */ | |
817 | temp[0] = '\0'; | |
818 | ||
819 | /* skip whitespace after operator */ | |
820 | while (isspace(linepos[0])) | |
821 | linepos++; | |
822 | if (linepos[0] == '\0') | |
823 | return -1; | |
824 | ||
825 | /* get the value */ | |
826 | if (linepos[0] == '"') | |
827 | linepos++; | |
828 | else | |
829 | return -1; | |
830 | *value = linepos; | |
831 | ||
832 | /* terminate */ | |
833 | temp = strchr(linepos, '"'); | |
834 | if (!temp) | |
835 | return -1; | |
836 | temp[0] = '\0'; | |
837 | temp++; | |
838 | ||
839 | /* move line to next key */ | |
840 | *line = temp; | |
841 | return 0; | |
842 | } | |
843 | ||
844 | /* extract possible KEY{attr} */ | |
845 | static const char *get_key_attribute(struct udev *udev, char *str) | |
846 | { | |
847 | char *pos; | |
848 | char *attr; | |
849 | ||
850 | attr = strchr(str, '{'); | |
851 | if (attr != NULL) { | |
852 | attr++; | |
853 | pos = strchr(attr, '}'); | |
854 | if (pos == NULL) { | |
60f067b4 | 855 | log_error("missing closing brace for format"); |
663996b3 MS |
856 | return NULL; |
857 | } | |
858 | pos[0] = '\0'; | |
859 | return attr; | |
860 | } | |
861 | return NULL; | |
862 | } | |
863 | ||
864 | static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type, | |
865 | enum operation_type op, | |
866 | const char *value, const void *data) | |
867 | { | |
868 | struct token *token = &rule_tmp->token[rule_tmp->token_cur]; | |
869 | const char *attr = NULL; | |
870 | ||
60f067b4 | 871 | memzero(token, sizeof(struct token)); |
663996b3 MS |
872 | |
873 | switch (type) { | |
874 | case TK_M_ACTION: | |
875 | case TK_M_DEVPATH: | |
876 | case TK_M_KERNEL: | |
877 | case TK_M_SUBSYSTEM: | |
878 | case TK_M_DRIVER: | |
879 | case TK_M_WAITFOR: | |
880 | case TK_M_DEVLINK: | |
881 | case TK_M_NAME: | |
882 | case TK_M_KERNELS: | |
883 | case TK_M_SUBSYSTEMS: | |
884 | case TK_M_DRIVERS: | |
885 | case TK_M_TAGS: | |
886 | case TK_M_PROGRAM: | |
887 | case TK_M_IMPORT_FILE: | |
888 | case TK_M_IMPORT_PROG: | |
889 | case TK_M_IMPORT_DB: | |
890 | case TK_M_IMPORT_CMDLINE: | |
891 | case TK_M_IMPORT_PARENT: | |
892 | case TK_M_RESULT: | |
893 | case TK_A_OWNER: | |
894 | case TK_A_GROUP: | |
895 | case TK_A_MODE: | |
896 | case TK_A_DEVLINK: | |
897 | case TK_A_NAME: | |
898 | case TK_A_GOTO: | |
899 | case TK_M_TAG: | |
900 | case TK_A_TAG: | |
60f067b4 | 901 | case TK_A_STATIC_NODE: |
663996b3 MS |
902 | token->key.value_off = rules_add_string(rule_tmp->rules, value); |
903 | break; | |
904 | case TK_M_IMPORT_BUILTIN: | |
905 | token->key.value_off = rules_add_string(rule_tmp->rules, value); | |
906 | token->key.builtin_cmd = *(enum udev_builtin_cmd *)data; | |
907 | break; | |
908 | case TK_M_ENV: | |
909 | case TK_M_ATTR: | |
910 | case TK_M_ATTRS: | |
911 | case TK_A_ATTR: | |
912 | case TK_A_ENV: | |
60f067b4 | 913 | case TK_A_SECLABEL: |
663996b3 MS |
914 | attr = data; |
915 | token->key.value_off = rules_add_string(rule_tmp->rules, value); | |
916 | token->key.attr_off = rules_add_string(rule_tmp->rules, attr); | |
917 | break; | |
918 | case TK_M_TEST: | |
919 | token->key.value_off = rules_add_string(rule_tmp->rules, value); | |
920 | if (data != NULL) | |
921 | token->key.mode = *(mode_t *)data; | |
922 | break; | |
923 | case TK_A_STRING_ESCAPE_NONE: | |
924 | case TK_A_STRING_ESCAPE_REPLACE: | |
925 | case TK_A_DB_PERSIST: | |
926 | break; | |
927 | case TK_A_RUN_BUILTIN: | |
928 | case TK_A_RUN_PROGRAM: | |
929 | token->key.builtin_cmd = *(enum udev_builtin_cmd *)data; | |
930 | token->key.value_off = rules_add_string(rule_tmp->rules, value); | |
931 | break; | |
932 | case TK_A_INOTIFY_WATCH: | |
933 | case TK_A_DEVLINK_PRIO: | |
934 | token->key.devlink_prio = *(int *)data; | |
935 | break; | |
936 | case TK_A_OWNER_ID: | |
937 | token->key.uid = *(uid_t *)data; | |
938 | break; | |
939 | case TK_A_GROUP_ID: | |
940 | token->key.gid = *(gid_t *)data; | |
941 | break; | |
942 | case TK_A_MODE_ID: | |
943 | token->key.mode = *(mode_t *)data; | |
944 | break; | |
663996b3 MS |
945 | case TK_M_EVENT_TIMEOUT: |
946 | token->key.event_timeout = *(int *)data; | |
947 | break; | |
948 | case TK_RULE: | |
949 | case TK_M_PARENTS_MIN: | |
950 | case TK_M_PARENTS_MAX: | |
951 | case TK_M_MAX: | |
952 | case TK_END: | |
953 | case TK_UNSET: | |
60f067b4 | 954 | log_error("wrong type %u", type); |
663996b3 MS |
955 | return -1; |
956 | } | |
957 | ||
958 | if (value != NULL && type < TK_M_MAX) { | |
959 | /* check if we need to split or call fnmatch() while matching rules */ | |
960 | enum string_glob_type glob; | |
961 | int has_split; | |
962 | int has_glob; | |
963 | ||
964 | has_split = (strchr(value, '|') != NULL); | |
60f067b4 | 965 | has_glob = string_is_glob(value); |
663996b3 MS |
966 | if (has_split && has_glob) { |
967 | glob = GL_SPLIT_GLOB; | |
968 | } else if (has_split) { | |
969 | glob = GL_SPLIT; | |
970 | } else if (has_glob) { | |
971 | if (streq(value, "?*")) | |
972 | glob = GL_SOMETHING; | |
973 | else | |
974 | glob = GL_GLOB; | |
975 | } else { | |
976 | glob = GL_PLAIN; | |
977 | } | |
978 | token->key.glob = glob; | |
979 | } | |
980 | ||
981 | if (value != NULL && type > TK_M_MAX) { | |
982 | /* check if assigned value has substitution chars */ | |
983 | if (value[0] == '[') | |
984 | token->key.subst = SB_SUBSYS; | |
985 | else if (strchr(value, '%') != NULL || strchr(value, '$') != NULL) | |
986 | token->key.subst = SB_FORMAT; | |
987 | else | |
988 | token->key.subst = SB_NONE; | |
989 | } | |
990 | ||
991 | if (attr != NULL) { | |
60f067b4 | 992 | /* check if property/attribute name has substitution chars */ |
663996b3 MS |
993 | if (attr[0] == '[') |
994 | token->key.attrsubst = SB_SUBSYS; | |
995 | else if (strchr(attr, '%') != NULL || strchr(attr, '$') != NULL) | |
996 | token->key.attrsubst = SB_FORMAT; | |
997 | else | |
998 | token->key.attrsubst = SB_NONE; | |
999 | } | |
1000 | ||
1001 | token->key.type = type; | |
1002 | token->key.op = op; | |
1003 | rule_tmp->token_cur++; | |
1004 | if (rule_tmp->token_cur >= ELEMENTSOF(rule_tmp->token)) { | |
60f067b4 | 1005 | log_error("temporary rule array too small"); |
663996b3 MS |
1006 | return -1; |
1007 | } | |
1008 | return 0; | |
1009 | } | |
1010 | ||
1011 | static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp) | |
1012 | { | |
1013 | unsigned int i; | |
1014 | unsigned int start = 0; | |
1015 | unsigned int end = rule_tmp->token_cur; | |
1016 | ||
1017 | for (i = 0; i < rule_tmp->token_cur; i++) { | |
1018 | enum token_type next_val = TK_UNSET; | |
1019 | unsigned int next_idx = 0; | |
1020 | unsigned int j; | |
1021 | ||
1022 | /* find smallest value */ | |
1023 | for (j = start; j < end; j++) { | |
1024 | if (rule_tmp->token[j].type == TK_UNSET) | |
1025 | continue; | |
1026 | if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) { | |
1027 | next_val = rule_tmp->token[j].type; | |
1028 | next_idx = j; | |
1029 | } | |
1030 | } | |
1031 | ||
1032 | /* add token and mark done */ | |
1033 | if (add_token(rules, &rule_tmp->token[next_idx]) != 0) | |
1034 | return -1; | |
1035 | rule_tmp->token[next_idx].type = TK_UNSET; | |
1036 | ||
1037 | /* shrink range */ | |
1038 | if (next_idx == start) | |
1039 | start++; | |
1040 | if (next_idx+1 == end) | |
1041 | end--; | |
1042 | } | |
1043 | return 0; | |
1044 | } | |
1045 | ||
1046 | static int add_rule(struct udev_rules *rules, char *line, | |
1047 | const char *filename, unsigned int filename_off, unsigned int lineno) | |
1048 | { | |
1049 | char *linepos; | |
1050 | const char *attr; | |
1051 | struct rule_tmp rule_tmp; | |
1052 | ||
60f067b4 | 1053 | memzero(&rule_tmp, sizeof(struct rule_tmp)); |
663996b3 MS |
1054 | rule_tmp.rules = rules; |
1055 | rule_tmp.rule.type = TK_RULE; | |
1056 | /* the offset in the rule is limited to unsigned short */ | |
1057 | if (filename_off < USHRT_MAX) | |
1058 | rule_tmp.rule.rule.filename_off = filename_off; | |
1059 | rule_tmp.rule.rule.filename_line = lineno; | |
1060 | ||
1061 | linepos = line; | |
1062 | for (;;) { | |
1063 | char *key; | |
1064 | char *value; | |
1065 | enum operation_type op; | |
1066 | ||
14228c0d MB |
1067 | if (get_key(rules->udev, &linepos, &key, &op, &value) != 0) { |
1068 | /* Avoid erroring on trailing whitespace. This is probably rare | |
1069 | * so save the work for the error case instead of always trying | |
1070 | * to strip the trailing whitespace with strstrip(). */ | |
1071 | while (isblank(*linepos)) | |
1072 | linepos++; | |
1073 | ||
1074 | /* If we aren't at the end of the line, this is a parsing error. | |
1075 | * Make a best effort to describe where the problem is. */ | |
1076 | if (*linepos != '\n') { | |
1077 | char buf[2] = {linepos[1]}; | |
1078 | _cleanup_free_ char *tmp; | |
1079 | ||
1080 | tmp = cescape(buf); | |
1081 | log_error("invalid key/value pair in file %s on line %u," | |
1082 | "starting at character %tu ('%s')\n", | |
1083 | filename, lineno, linepos - line + 1, tmp); | |
1084 | if (linepos[1] == '#') | |
60f067b4 | 1085 | log_error("hint: comments can only start at beginning of line"); |
14228c0d | 1086 | } |
663996b3 | 1087 | break; |
14228c0d | 1088 | } |
663996b3 MS |
1089 | |
1090 | if (streq(key, "ACTION")) { | |
1091 | if (op > OP_MATCH_MAX) { | |
60f067b4 | 1092 | log_error("invalid ACTION operation"); |
663996b3 MS |
1093 | goto invalid; |
1094 | } | |
1095 | rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL); | |
1096 | continue; | |
1097 | } | |
1098 | ||
1099 | if (streq(key, "DEVPATH")) { | |
1100 | if (op > OP_MATCH_MAX) { | |
60f067b4 | 1101 | log_error("invalid DEVPATH operation"); |
663996b3 MS |
1102 | goto invalid; |
1103 | } | |
1104 | rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL); | |
1105 | continue; | |
1106 | } | |
1107 | ||
1108 | if (streq(key, "KERNEL")) { | |
1109 | if (op > OP_MATCH_MAX) { | |
60f067b4 | 1110 | log_error("invalid KERNEL operation"); |
663996b3 MS |
1111 | goto invalid; |
1112 | } | |
1113 | rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL); | |
1114 | continue; | |
1115 | } | |
1116 | ||
1117 | if (streq(key, "SUBSYSTEM")) { | |
1118 | if (op > OP_MATCH_MAX) { | |
60f067b4 | 1119 | log_error("invalid SUBSYSTEM operation"); |
663996b3 MS |
1120 | goto invalid; |
1121 | } | |
1122 | /* bus, class, subsystem events should all be the same */ | |
1123 | if (streq(value, "subsystem") || | |
1124 | streq(value, "bus") || | |
1125 | streq(value, "class")) { | |
1126 | if (streq(value, "bus") || streq(value, "class")) | |
60f067b4 | 1127 | log_error("'%s' must be specified as 'subsystem' " |
663996b3 MS |
1128 | "please fix it in %s:%u", value, filename, lineno); |
1129 | rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL); | |
1130 | } else | |
1131 | rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL); | |
1132 | continue; | |
1133 | } | |
1134 | ||
1135 | if (streq(key, "DRIVER")) { | |
1136 | if (op > OP_MATCH_MAX) { | |
60f067b4 | 1137 | log_error("invalid DRIVER operation"); |
663996b3 MS |
1138 | goto invalid; |
1139 | } | |
1140 | rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL); | |
1141 | continue; | |
1142 | } | |
1143 | ||
1144 | if (startswith(key, "ATTR{")) { | |
60f067b4 | 1145 | attr = get_key_attribute(rules->udev, key + strlen("ATTR")); |
663996b3 | 1146 | if (attr == NULL) { |
60f067b4 | 1147 | log_error("error parsing ATTR attribute"); |
663996b3 MS |
1148 | goto invalid; |
1149 | } | |
1150 | if (op < OP_MATCH_MAX) { | |
1151 | rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr); | |
1152 | } else { | |
1153 | rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr); | |
1154 | } | |
1155 | continue; | |
1156 | } | |
1157 | ||
60f067b4 JS |
1158 | if (startswith(key, "SECLABEL{")) { |
1159 | attr = get_key_attribute(rules->udev, key + strlen("SECLABEL")); | |
1160 | if (!attr) { | |
1161 | log_error("error parsing SECLABEL attribute"); | |
1162 | goto invalid; | |
1163 | } | |
1164 | ||
1165 | rule_add_key(&rule_tmp, TK_A_SECLABEL, op, value, attr); | |
1166 | continue; | |
1167 | } | |
1168 | ||
663996b3 MS |
1169 | if (streq(key, "KERNELS")) { |
1170 | if (op > OP_MATCH_MAX) { | |
60f067b4 | 1171 | log_error("invalid KERNELS operation"); |
663996b3 MS |
1172 | goto invalid; |
1173 | } | |
1174 | rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL); | |
1175 | continue; | |
1176 | } | |
1177 | ||
1178 | if (streq(key, "SUBSYSTEMS")) { | |
1179 | if (op > OP_MATCH_MAX) { | |
60f067b4 | 1180 | log_error("invalid SUBSYSTEMS operation"); |
663996b3 MS |
1181 | goto invalid; |
1182 | } | |
1183 | rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL); | |
1184 | continue; | |
1185 | } | |
1186 | ||
1187 | if (streq(key, "DRIVERS")) { | |
1188 | if (op > OP_MATCH_MAX) { | |
60f067b4 | 1189 | log_error("invalid DRIVERS operation"); |
663996b3 MS |
1190 | goto invalid; |
1191 | } | |
1192 | rule_add_key(&rule_tmp, TK_M_DRIVERS, op, value, NULL); | |
1193 | continue; | |
1194 | } | |
1195 | ||
1196 | if (startswith(key, "ATTRS{")) { | |
1197 | if (op > OP_MATCH_MAX) { | |
60f067b4 | 1198 | log_error("invalid ATTRS operation"); |
663996b3 MS |
1199 | goto invalid; |
1200 | } | |
60f067b4 | 1201 | attr = get_key_attribute(rules->udev, key + strlen("ATTRS")); |
663996b3 | 1202 | if (attr == NULL) { |
60f067b4 | 1203 | log_error("error parsing ATTRS attribute"); |
663996b3 MS |
1204 | goto invalid; |
1205 | } | |
1206 | if (startswith(attr, "device/")) | |
1207 | log_error("the 'device' link may not be available in a future kernel, " | |
1208 | "please fix it in %s:%u", filename, lineno); | |
1209 | else if (strstr(attr, "../") != NULL) | |
1210 | log_error("do not reference parent sysfs directories directly, " | |
1211 | "it may break with a future kernel, please fix it in %s:%u", filename, lineno); | |
1212 | rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr); | |
1213 | continue; | |
1214 | } | |
1215 | ||
1216 | if (streq(key, "TAGS")) { | |
1217 | if (op > OP_MATCH_MAX) { | |
60f067b4 | 1218 | log_error("invalid TAGS operation"); |
663996b3 MS |
1219 | goto invalid; |
1220 | } | |
1221 | rule_add_key(&rule_tmp, TK_M_TAGS, op, value, NULL); | |
1222 | continue; | |
1223 | } | |
1224 | ||
1225 | if (startswith(key, "ENV{")) { | |
60f067b4 | 1226 | attr = get_key_attribute(rules->udev, key + strlen("ENV")); |
663996b3 | 1227 | if (attr == NULL) { |
60f067b4 | 1228 | log_error("error parsing ENV attribute"); |
663996b3 MS |
1229 | goto invalid; |
1230 | } | |
1231 | if (op < OP_MATCH_MAX) { | |
1232 | if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0) | |
1233 | goto invalid; | |
1234 | } else { | |
1235 | static const char *blacklist[] = { | |
1236 | "ACTION", | |
1237 | "SUBSYSTEM", | |
1238 | "DEVTYPE", | |
1239 | "MAJOR", | |
1240 | "MINOR", | |
1241 | "DRIVER", | |
1242 | "IFINDEX", | |
1243 | "DEVNAME", | |
1244 | "DEVLINKS", | |
1245 | "DEVPATH", | |
1246 | "TAGS", | |
1247 | }; | |
1248 | unsigned int i; | |
1249 | ||
1250 | for (i = 0; i < ELEMENTSOF(blacklist); i++) { | |
1251 | if (!streq(attr, blacklist[i])) | |
1252 | continue; | |
60f067b4 | 1253 | log_error("invalid ENV attribute, '%s' can not be set %s:%u", attr, filename, lineno); |
663996b3 MS |
1254 | goto invalid; |
1255 | } | |
1256 | if (rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr) != 0) | |
1257 | goto invalid; | |
1258 | } | |
1259 | continue; | |
1260 | } | |
1261 | ||
1262 | if (streq(key, "TAG")) { | |
1263 | if (op < OP_MATCH_MAX) | |
1264 | rule_add_key(&rule_tmp, TK_M_TAG, op, value, NULL); | |
1265 | else | |
1266 | rule_add_key(&rule_tmp, TK_A_TAG, op, value, NULL); | |
1267 | continue; | |
1268 | } | |
1269 | ||
1270 | if (streq(key, "PROGRAM")) { | |
1271 | rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL); | |
1272 | continue; | |
1273 | } | |
1274 | ||
1275 | if (streq(key, "RESULT")) { | |
1276 | if (op > OP_MATCH_MAX) { | |
60f067b4 | 1277 | log_error("invalid RESULT operation"); |
663996b3 MS |
1278 | goto invalid; |
1279 | } | |
1280 | rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL); | |
1281 | continue; | |
1282 | } | |
1283 | ||
1284 | if (startswith(key, "IMPORT")) { | |
60f067b4 | 1285 | attr = get_key_attribute(rules->udev, key + strlen("IMPORT")); |
663996b3 | 1286 | if (attr == NULL) { |
60f067b4 | 1287 | log_error("IMPORT{} type missing, ignoring IMPORT %s:%u", filename, lineno); |
663996b3 MS |
1288 | continue; |
1289 | } | |
1290 | if (streq(attr, "program")) { | |
1291 | /* find known built-in command */ | |
1292 | if (value[0] != '/') { | |
1293 | enum udev_builtin_cmd cmd; | |
1294 | ||
1295 | cmd = udev_builtin_lookup(value); | |
1296 | if (cmd < UDEV_BUILTIN_MAX) { | |
60f067b4 | 1297 | log_debug("IMPORT found builtin '%s', replacing %s:%u", |
663996b3 MS |
1298 | value, filename, lineno); |
1299 | rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, value, &cmd); | |
1300 | continue; | |
1301 | } | |
1302 | } | |
1303 | rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL); | |
1304 | } else if (streq(attr, "builtin")) { | |
1305 | enum udev_builtin_cmd cmd = udev_builtin_lookup(value); | |
1306 | ||
1307 | if (cmd < UDEV_BUILTIN_MAX) | |
1308 | rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, value, &cmd); | |
1309 | else | |
60f067b4 | 1310 | log_error("IMPORT{builtin}: '%s' unknown %s:%u", value, filename, lineno); |
663996b3 MS |
1311 | } else if (streq(attr, "file")) { |
1312 | rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL); | |
1313 | } else if (streq(attr, "db")) { | |
1314 | rule_add_key(&rule_tmp, TK_M_IMPORT_DB, op, value, NULL); | |
1315 | } else if (streq(attr, "cmdline")) { | |
1316 | rule_add_key(&rule_tmp, TK_M_IMPORT_CMDLINE, op, value, NULL); | |
1317 | } else if (streq(attr, "parent")) { | |
1318 | rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL); | |
1319 | } else | |
60f067b4 | 1320 | log_error("IMPORT{} unknown type, ignoring IMPORT %s:%u", filename, lineno); |
663996b3 MS |
1321 | continue; |
1322 | } | |
1323 | ||
1324 | if (startswith(key, "TEST")) { | |
1325 | mode_t mode = 0; | |
1326 | ||
1327 | if (op > OP_MATCH_MAX) { | |
60f067b4 | 1328 | log_error("invalid TEST operation"); |
663996b3 MS |
1329 | goto invalid; |
1330 | } | |
60f067b4 | 1331 | attr = get_key_attribute(rules->udev, key + strlen("TEST")); |
663996b3 MS |
1332 | if (attr != NULL) { |
1333 | mode = strtol(attr, NULL, 8); | |
1334 | rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode); | |
1335 | } else { | |
1336 | rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL); | |
1337 | } | |
1338 | continue; | |
1339 | } | |
1340 | ||
1341 | if (startswith(key, "RUN")) { | |
60f067b4 | 1342 | attr = get_key_attribute(rules->udev, key + strlen("RUN")); |
663996b3 MS |
1343 | if (attr == NULL) |
1344 | attr = "program"; | |
1345 | ||
1346 | if (streq(attr, "builtin")) { | |
1347 | enum udev_builtin_cmd cmd = udev_builtin_lookup(value); | |
1348 | ||
1349 | if (cmd < UDEV_BUILTIN_MAX) | |
1350 | rule_add_key(&rule_tmp, TK_A_RUN_BUILTIN, op, value, &cmd); | |
1351 | else | |
60f067b4 | 1352 | log_error("IMPORT{builtin}: '%s' unknown %s:%u", value, filename, lineno); |
663996b3 MS |
1353 | } else if (streq(attr, "program")) { |
1354 | enum udev_builtin_cmd cmd = UDEV_BUILTIN_MAX; | |
1355 | ||
1356 | rule_add_key(&rule_tmp, TK_A_RUN_PROGRAM, op, value, &cmd); | |
1357 | } else { | |
60f067b4 | 1358 | log_error("RUN{} unknown type, ignoring RUN %s:%u", filename, lineno); |
663996b3 MS |
1359 | } |
1360 | ||
1361 | continue; | |
1362 | } | |
1363 | ||
1364 | if (streq(key, "WAIT_FOR") || streq(key, "WAIT_FOR_SYSFS")) { | |
1365 | rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL); | |
1366 | continue; | |
1367 | } | |
1368 | ||
1369 | if (streq(key, "LABEL")) { | |
1370 | rule_tmp.rule.rule.label_off = rules_add_string(rules, value); | |
1371 | continue; | |
1372 | } | |
1373 | ||
1374 | if (streq(key, "GOTO")) { | |
1375 | rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL); | |
1376 | continue; | |
1377 | } | |
1378 | ||
1379 | if (startswith(key, "NAME")) { | |
1380 | if (op < OP_MATCH_MAX) { | |
1381 | rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL); | |
1382 | } else { | |
1383 | if (streq(value, "%k")) { | |
1384 | log_error("NAME=\"%%k\" is ignored, because it breaks kernel supplied names, " | |
1385 | "please remove it from %s:%u\n", filename, lineno); | |
1386 | continue; | |
1387 | } | |
1388 | if (value[0] == '\0') { | |
1389 | log_debug("NAME=\"\" is ignored, because udev will not delete any device nodes, " | |
1390 | "please remove it from %s:%u\n", filename, lineno); | |
1391 | continue; | |
1392 | } | |
1393 | rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL); | |
1394 | } | |
1395 | rule_tmp.rule.rule.can_set_name = true; | |
1396 | continue; | |
1397 | } | |
1398 | ||
1399 | if (streq(key, "SYMLINK")) { | |
1400 | if (op < OP_MATCH_MAX) | |
1401 | rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL); | |
1402 | else | |
1403 | rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, NULL); | |
1404 | rule_tmp.rule.rule.can_set_name = true; | |
1405 | continue; | |
1406 | } | |
1407 | ||
1408 | if (streq(key, "OWNER")) { | |
1409 | uid_t uid; | |
1410 | char *endptr; | |
1411 | ||
1412 | uid = strtoul(value, &endptr, 10); | |
1413 | if (endptr[0] == '\0') { | |
1414 | rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid); | |
1415 | } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) { | |
1416 | uid = add_uid(rules, value); | |
1417 | rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid); | |
1418 | } else if (rules->resolve_names >= 0) { | |
1419 | rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL); | |
1420 | } | |
1421 | rule_tmp.rule.rule.can_set_name = true; | |
1422 | continue; | |
1423 | } | |
1424 | ||
1425 | if (streq(key, "GROUP")) { | |
1426 | gid_t gid; | |
1427 | char *endptr; | |
1428 | ||
1429 | gid = strtoul(value, &endptr, 10); | |
1430 | if (endptr[0] == '\0') { | |
1431 | rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid); | |
1432 | } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) { | |
1433 | gid = add_gid(rules, value); | |
1434 | rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid); | |
1435 | } else if (rules->resolve_names >= 0) { | |
1436 | rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL); | |
1437 | } | |
1438 | rule_tmp.rule.rule.can_set_name = true; | |
1439 | continue; | |
1440 | } | |
1441 | ||
1442 | if (streq(key, "MODE")) { | |
1443 | mode_t mode; | |
1444 | char *endptr; | |
1445 | ||
1446 | mode = strtol(value, &endptr, 8); | |
1447 | if (endptr[0] == '\0') | |
1448 | rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode); | |
1449 | else | |
1450 | rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL); | |
1451 | rule_tmp.rule.rule.can_set_name = true; | |
1452 | continue; | |
1453 | } | |
1454 | ||
1455 | if (streq(key, "OPTIONS")) { | |
1456 | const char *pos; | |
1457 | ||
1458 | pos = strstr(value, "link_priority="); | |
1459 | if (pos != NULL) { | |
1460 | int prio = atoi(&pos[strlen("link_priority=")]); | |
1461 | ||
1462 | rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, op, NULL, &prio); | |
1463 | } | |
1464 | ||
1465 | pos = strstr(value, "event_timeout="); | |
1466 | if (pos != NULL) { | |
1467 | int tout = atoi(&pos[strlen("event_timeout=")]); | |
1468 | ||
1469 | rule_add_key(&rule_tmp, TK_M_EVENT_TIMEOUT, op, NULL, &tout); | |
1470 | } | |
1471 | ||
1472 | pos = strstr(value, "string_escape="); | |
1473 | if (pos != NULL) { | |
1474 | pos = &pos[strlen("string_escape=")]; | |
1475 | if (startswith(pos, "none")) | |
1476 | rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, op, NULL, NULL); | |
1477 | else if (startswith(pos, "replace")) | |
1478 | rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, op, NULL, NULL); | |
1479 | } | |
1480 | ||
1481 | pos = strstr(value, "db_persist"); | |
1482 | if (pos != NULL) | |
1483 | rule_add_key(&rule_tmp, TK_A_DB_PERSIST, op, NULL, NULL); | |
1484 | ||
1485 | pos = strstr(value, "nowatch"); | |
1486 | if (pos != NULL) { | |
1487 | const int off = 0; | |
1488 | ||
1489 | rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &off); | |
1490 | } else { | |
1491 | pos = strstr(value, "watch"); | |
1492 | if (pos != NULL) { | |
1493 | const int on = 1; | |
1494 | ||
1495 | rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &on); | |
1496 | } | |
1497 | } | |
1498 | ||
1499 | pos = strstr(value, "static_node="); | |
1500 | if (pos != NULL) { | |
1501 | rule_add_key(&rule_tmp, TK_A_STATIC_NODE, op, &pos[strlen("static_node=")], NULL); | |
1502 | rule_tmp.rule.rule.has_static_node = true; | |
1503 | } | |
1504 | ||
1505 | continue; | |
1506 | } | |
1507 | ||
60f067b4 | 1508 | log_error("unknown key '%s' in %s:%u", key, filename, lineno); |
663996b3 MS |
1509 | goto invalid; |
1510 | } | |
1511 | ||
1512 | /* add rule token */ | |
1513 | rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur; | |
1514 | if (add_token(rules, &rule_tmp.rule) != 0) | |
1515 | goto invalid; | |
1516 | ||
1517 | /* add tokens to list, sorted by type */ | |
1518 | if (sort_token(rules, &rule_tmp) != 0) | |
1519 | goto invalid; | |
1520 | ||
1521 | return 0; | |
1522 | invalid: | |
60f067b4 | 1523 | log_error("invalid rule '%s:%u'", filename, lineno); |
663996b3 MS |
1524 | return -1; |
1525 | } | |
1526 | ||
1527 | static int parse_file(struct udev_rules *rules, const char *filename) | |
1528 | { | |
1529 | FILE *f; | |
1530 | unsigned int first_token; | |
1531 | unsigned int filename_off; | |
1532 | char line[UTIL_LINE_SIZE]; | |
1533 | int line_nr = 0; | |
1534 | unsigned int i; | |
1535 | ||
1536 | if (null_or_empty_path(filename)) { | |
60f067b4 | 1537 | log_debug("skip empty file: %s", filename); |
663996b3 MS |
1538 | return 0; |
1539 | } | |
60f067b4 | 1540 | log_debug("read rules file: %s", filename); |
663996b3 MS |
1541 | |
1542 | f = fopen(filename, "re"); | |
1543 | if (f == NULL) | |
1544 | return -1; | |
1545 | ||
1546 | first_token = rules->token_cur; | |
1547 | filename_off = rules_add_string(rules, filename); | |
1548 | ||
1549 | while (fgets(line, sizeof(line), f) != NULL) { | |
1550 | char *key; | |
1551 | size_t len; | |
1552 | ||
1553 | /* skip whitespace */ | |
1554 | line_nr++; | |
1555 | key = line; | |
1556 | while (isspace(key[0])) | |
1557 | key++; | |
1558 | ||
1559 | /* comment */ | |
1560 | if (key[0] == '#') | |
1561 | continue; | |
1562 | ||
1563 | len = strlen(line); | |
1564 | if (len < 3) | |
1565 | continue; | |
1566 | ||
1567 | /* continue reading if backslash+newline is found */ | |
1568 | while (line[len-2] == '\\') { | |
1569 | if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL) | |
1570 | break; | |
1571 | if (strlen(&line[len-2]) < 2) | |
1572 | break; | |
1573 | line_nr++; | |
1574 | len = strlen(line); | |
1575 | } | |
1576 | ||
1577 | if (len+1 >= sizeof(line)) { | |
60f067b4 | 1578 | log_error("line too long '%s':%u, ignored", filename, line_nr); |
663996b3 MS |
1579 | continue; |
1580 | } | |
1581 | add_rule(rules, key, filename, filename_off, line_nr); | |
1582 | } | |
1583 | fclose(f); | |
1584 | ||
1585 | /* link GOTOs to LABEL rules in this file to be able to fast-forward */ | |
1586 | for (i = first_token+1; i < rules->token_cur; i++) { | |
1587 | if (rules->tokens[i].type == TK_A_GOTO) { | |
1588 | char *label = rules_str(rules, rules->tokens[i].key.value_off); | |
1589 | unsigned int j; | |
1590 | ||
1591 | for (j = i+1; j < rules->token_cur; j++) { | |
1592 | if (rules->tokens[j].type != TK_RULE) | |
1593 | continue; | |
1594 | if (rules->tokens[j].rule.label_off == 0) | |
1595 | continue; | |
1596 | if (!streq(label, rules_str(rules, rules->tokens[j].rule.label_off))) | |
1597 | continue; | |
1598 | rules->tokens[i].key.rule_goto = j; | |
1599 | break; | |
1600 | } | |
1601 | if (rules->tokens[i].key.rule_goto == 0) | |
60f067b4 | 1602 | log_error("GOTO '%s' has no matching label in: '%s'", label, filename); |
663996b3 MS |
1603 | } |
1604 | } | |
1605 | return 0; | |
1606 | } | |
1607 | ||
1608 | struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names) | |
1609 | { | |
1610 | struct udev_rules *rules; | |
1611 | struct udev_list file_list; | |
1612 | struct token end_token; | |
1613 | char **files, **f; | |
1614 | int r; | |
1615 | ||
60f067b4 | 1616 | rules = new0(struct udev_rules, 1); |
663996b3 MS |
1617 | if (rules == NULL) |
1618 | return NULL; | |
1619 | rules->udev = udev; | |
1620 | rules->resolve_names = resolve_names; | |
1621 | udev_list_init(udev, &file_list, true); | |
1622 | ||
1623 | /* init token array and string buffer */ | |
1624 | rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token)); | |
1625 | if (rules->tokens == NULL) | |
1626 | return udev_rules_unref(rules); | |
1627 | rules->token_max = PREALLOC_TOKEN; | |
1628 | ||
1629 | rules->strbuf = strbuf_new(); | |
1630 | if (!rules->strbuf) | |
1631 | return udev_rules_unref(rules); | |
1632 | ||
663996b3 MS |
1633 | udev_rules_check_timestamp(rules); |
1634 | ||
60f067b4 | 1635 | r = conf_files_list_strv(&files, ".rules", NULL, rules_dirs); |
663996b3 | 1636 | if (r < 0) { |
60f067b4 | 1637 | log_error("failed to enumerate rules files: %s", strerror(-r)); |
663996b3 MS |
1638 | return udev_rules_unref(rules); |
1639 | } | |
1640 | ||
1641 | /* | |
1642 | * The offset value in the rules strct is limited; add all | |
1643 | * rules file names to the beginning of the string buffer. | |
1644 | */ | |
1645 | STRV_FOREACH(f, files) | |
1646 | rules_add_string(rules, *f); | |
1647 | ||
1648 | STRV_FOREACH(f, files) | |
1649 | parse_file(rules, *f); | |
1650 | ||
1651 | strv_free(files); | |
1652 | ||
60f067b4 | 1653 | memzero(&end_token, sizeof(struct token)); |
663996b3 MS |
1654 | end_token.type = TK_END; |
1655 | add_token(rules, &end_token); | |
60f067b4 | 1656 | log_debug("rules contain %zu bytes tokens (%u * %zu bytes), %zu bytes strings", |
663996b3 MS |
1657 | rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->strbuf->len); |
1658 | ||
1659 | /* cleanup temporary strbuf data */ | |
60f067b4 | 1660 | log_debug("%zu strings (%zu bytes), %zu de-duplicated (%zu bytes), %zu trie nodes used", |
663996b3 MS |
1661 | rules->strbuf->in_count, rules->strbuf->in_len, |
1662 | rules->strbuf->dedup_count, rules->strbuf->dedup_len, rules->strbuf->nodes_count); | |
1663 | strbuf_complete(rules->strbuf); | |
1664 | ||
1665 | /* cleanup uid/gid cache */ | |
1666 | free(rules->uids); | |
1667 | rules->uids = NULL; | |
1668 | rules->uids_cur = 0; | |
1669 | rules->uids_max = 0; | |
1670 | free(rules->gids); | |
1671 | rules->gids = NULL; | |
1672 | rules->gids_cur = 0; | |
1673 | rules->gids_max = 0; | |
1674 | ||
1675 | dump_rules(rules); | |
1676 | return rules; | |
1677 | } | |
1678 | ||
1679 | struct udev_rules *udev_rules_unref(struct udev_rules *rules) | |
1680 | { | |
1681 | if (rules == NULL) | |
1682 | return NULL; | |
1683 | free(rules->tokens); | |
1684 | strbuf_cleanup(rules->strbuf); | |
1685 | free(rules->uids); | |
1686 | free(rules->gids); | |
663996b3 MS |
1687 | free(rules); |
1688 | return NULL; | |
1689 | } | |
1690 | ||
1691 | bool udev_rules_check_timestamp(struct udev_rules *rules) | |
1692 | { | |
60f067b4 JS |
1693 | if (!rules) |
1694 | return false; | |
663996b3 | 1695 | |
60f067b4 | 1696 | return paths_check_timestamp(rules_dirs, &rules->dirs_ts_usec, true); |
663996b3 MS |
1697 | } |
1698 | ||
1699 | static int match_key(struct udev_rules *rules, struct token *token, const char *val) | |
1700 | { | |
1701 | char *key_value = rules_str(rules, token->key.value_off); | |
1702 | char *pos; | |
1703 | bool match = false; | |
1704 | ||
1705 | if (val == NULL) | |
1706 | val = ""; | |
1707 | ||
1708 | switch (token->key.glob) { | |
1709 | case GL_PLAIN: | |
1710 | match = (streq(key_value, val)); | |
1711 | break; | |
1712 | case GL_GLOB: | |
1713 | match = (fnmatch(key_value, val, 0) == 0); | |
1714 | break; | |
1715 | case GL_SPLIT: | |
1716 | { | |
1717 | const char *s; | |
1718 | size_t len; | |
1719 | ||
1720 | s = rules_str(rules, token->key.value_off); | |
1721 | len = strlen(val); | |
1722 | for (;;) { | |
1723 | const char *next; | |
1724 | ||
1725 | next = strchr(s, '|'); | |
1726 | if (next != NULL) { | |
1727 | size_t matchlen = (size_t)(next - s); | |
1728 | ||
1729 | match = (matchlen == len && strneq(s, val, matchlen)); | |
1730 | if (match) | |
1731 | break; | |
1732 | } else { | |
1733 | match = (streq(s, val)); | |
1734 | break; | |
1735 | } | |
1736 | s = &next[1]; | |
1737 | } | |
1738 | break; | |
1739 | } | |
1740 | case GL_SPLIT_GLOB: | |
1741 | { | |
1742 | char value[UTIL_PATH_SIZE]; | |
1743 | ||
1744 | strscpy(value, sizeof(value), rules_str(rules, token->key.value_off)); | |
1745 | key_value = value; | |
1746 | while (key_value != NULL) { | |
1747 | pos = strchr(key_value, '|'); | |
1748 | if (pos != NULL) { | |
1749 | pos[0] = '\0'; | |
1750 | pos = &pos[1]; | |
1751 | } | |
1752 | match = (fnmatch(key_value, val, 0) == 0); | |
1753 | if (match) | |
1754 | break; | |
1755 | key_value = pos; | |
1756 | } | |
1757 | break; | |
1758 | } | |
1759 | case GL_SOMETHING: | |
1760 | match = (val[0] != '\0'); | |
1761 | break; | |
1762 | case GL_UNSET: | |
1763 | return -1; | |
1764 | } | |
1765 | ||
1766 | if (match && (token->key.op == OP_MATCH)) | |
1767 | return 0; | |
1768 | if (!match && (token->key.op == OP_NOMATCH)) | |
1769 | return 0; | |
1770 | return -1; | |
1771 | } | |
1772 | ||
1773 | static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur) | |
1774 | { | |
1775 | const char *name; | |
1776 | char nbuf[UTIL_NAME_SIZE]; | |
1777 | const char *value; | |
1778 | char vbuf[UTIL_NAME_SIZE]; | |
1779 | size_t len; | |
1780 | ||
1781 | name = rules_str(rules, cur->key.attr_off); | |
1782 | switch (cur->key.attrsubst) { | |
1783 | case SB_FORMAT: | |
1784 | udev_event_apply_format(event, name, nbuf, sizeof(nbuf)); | |
1785 | name = nbuf; | |
1786 | /* fall through */ | |
1787 | case SB_NONE: | |
1788 | value = udev_device_get_sysattr_value(dev, name); | |
1789 | if (value == NULL) | |
1790 | return -1; | |
1791 | break; | |
1792 | case SB_SUBSYS: | |
1793 | if (util_resolve_subsys_kernel(event->udev, name, vbuf, sizeof(vbuf), 1) != 0) | |
1794 | return -1; | |
1795 | value = vbuf; | |
1796 | break; | |
1797 | default: | |
1798 | return -1; | |
1799 | } | |
1800 | ||
1801 | /* remove trailing whitespace, if not asked to match for it */ | |
1802 | len = strlen(value); | |
1803 | if (len > 0 && isspace(value[len-1])) { | |
1804 | const char *key_value; | |
1805 | size_t klen; | |
1806 | ||
1807 | key_value = rules_str(rules, cur->key.value_off); | |
1808 | klen = strlen(key_value); | |
1809 | if (klen > 0 && !isspace(key_value[klen-1])) { | |
1810 | if (value != vbuf) { | |
1811 | strscpy(vbuf, sizeof(vbuf), value); | |
1812 | value = vbuf; | |
1813 | } | |
1814 | while (len > 0 && isspace(vbuf[--len])) | |
1815 | vbuf[len] = '\0'; | |
1816 | } | |
1817 | } | |
1818 | ||
1819 | return match_key(rules, cur, value); | |
1820 | } | |
1821 | ||
1822 | enum escape_type { | |
1823 | ESCAPE_UNSET, | |
1824 | ESCAPE_NONE, | |
1825 | ESCAPE_REPLACE, | |
1826 | }; | |
1827 | ||
1828 | int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event, const sigset_t *sigmask) | |
1829 | { | |
1830 | struct token *cur; | |
1831 | struct token *rule; | |
1832 | enum escape_type esc = ESCAPE_UNSET; | |
1833 | bool can_set_name; | |
1834 | ||
1835 | if (rules->tokens == NULL) | |
1836 | return -1; | |
1837 | ||
1838 | can_set_name = ((!streq(udev_device_get_action(event->dev), "remove")) && | |
1839 | (major(udev_device_get_devnum(event->dev)) > 0 || | |
1840 | udev_device_get_ifindex(event->dev) > 0)); | |
1841 | ||
1842 | /* loop through token list, match, run actions or forward to next rule */ | |
1843 | cur = &rules->tokens[0]; | |
1844 | rule = cur; | |
1845 | for (;;) { | |
1846 | dump_token(rules, cur); | |
1847 | switch (cur->type) { | |
1848 | case TK_RULE: | |
1849 | /* current rule */ | |
1850 | rule = cur; | |
1851 | /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */ | |
1852 | if (!can_set_name && rule->rule.can_set_name) | |
1853 | goto nomatch; | |
1854 | esc = ESCAPE_UNSET; | |
1855 | break; | |
1856 | case TK_M_ACTION: | |
1857 | if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0) | |
1858 | goto nomatch; | |
1859 | break; | |
1860 | case TK_M_DEVPATH: | |
1861 | if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0) | |
1862 | goto nomatch; | |
1863 | break; | |
1864 | case TK_M_KERNEL: | |
1865 | if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0) | |
1866 | goto nomatch; | |
1867 | break; | |
1868 | case TK_M_DEVLINK: { | |
1869 | struct udev_list_entry *list_entry; | |
1870 | bool match = false; | |
1871 | ||
1872 | udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) { | |
1873 | const char *devlink; | |
1874 | ||
1875 | devlink = udev_list_entry_get_name(list_entry) + strlen("/dev/"); | |
1876 | if (match_key(rules, cur, devlink) == 0) { | |
1877 | match = true; | |
1878 | break; | |
1879 | } | |
1880 | } | |
1881 | if (!match) | |
1882 | goto nomatch; | |
1883 | break; | |
1884 | } | |
1885 | case TK_M_NAME: | |
1886 | if (match_key(rules, cur, event->name) != 0) | |
1887 | goto nomatch; | |
1888 | break; | |
1889 | case TK_M_ENV: { | |
1890 | const char *key_name = rules_str(rules, cur->key.attr_off); | |
1891 | const char *value; | |
1892 | ||
1893 | value = udev_device_get_property_value(event->dev, key_name); | |
1894 | if (value == NULL) | |
1895 | value = ""; | |
1896 | if (match_key(rules, cur, value)) | |
1897 | goto nomatch; | |
1898 | break; | |
1899 | } | |
1900 | case TK_M_TAG: { | |
1901 | struct udev_list_entry *list_entry; | |
1902 | bool match = false; | |
1903 | ||
1904 | udev_list_entry_foreach(list_entry, udev_device_get_tags_list_entry(event->dev)) { | |
1905 | if (streq(rules_str(rules, cur->key.value_off), udev_list_entry_get_name(list_entry))) { | |
1906 | match = true; | |
1907 | break; | |
1908 | } | |
1909 | } | |
1910 | if (!match && (cur->key.op != OP_NOMATCH)) | |
1911 | goto nomatch; | |
1912 | break; | |
1913 | } | |
1914 | case TK_M_SUBSYSTEM: | |
1915 | if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0) | |
1916 | goto nomatch; | |
1917 | break; | |
1918 | case TK_M_DRIVER: | |
1919 | if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0) | |
1920 | goto nomatch; | |
1921 | break; | |
1922 | case TK_M_WAITFOR: { | |
1923 | char filename[UTIL_PATH_SIZE]; | |
1924 | int found; | |
1925 | ||
1926 | udev_event_apply_format(event, rules_str(rules, cur->key.value_off), filename, sizeof(filename)); | |
1927 | found = (wait_for_file(event->dev, filename, 10) == 0); | |
1928 | if (!found && (cur->key.op != OP_NOMATCH)) | |
1929 | goto nomatch; | |
1930 | break; | |
1931 | } | |
1932 | case TK_M_ATTR: | |
1933 | if (match_attr(rules, event->dev, event, cur) != 0) | |
1934 | goto nomatch; | |
1935 | break; | |
1936 | case TK_M_KERNELS: | |
1937 | case TK_M_SUBSYSTEMS: | |
1938 | case TK_M_DRIVERS: | |
1939 | case TK_M_ATTRS: | |
1940 | case TK_M_TAGS: { | |
1941 | struct token *next; | |
1942 | ||
1943 | /* get whole sequence of parent matches */ | |
1944 | next = cur; | |
1945 | while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX) | |
1946 | next++; | |
1947 | ||
1948 | /* loop over parents */ | |
1949 | event->dev_parent = event->dev; | |
1950 | for (;;) { | |
1951 | struct token *key; | |
1952 | ||
1953 | /* loop over sequence of parent match keys */ | |
1954 | for (key = cur; key < next; key++ ) { | |
1955 | dump_token(rules, key); | |
1956 | switch(key->type) { | |
1957 | case TK_M_KERNELS: | |
1958 | if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0) | |
1959 | goto try_parent; | |
1960 | break; | |
1961 | case TK_M_SUBSYSTEMS: | |
1962 | if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0) | |
1963 | goto try_parent; | |
1964 | break; | |
1965 | case TK_M_DRIVERS: | |
1966 | if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0) | |
1967 | goto try_parent; | |
1968 | break; | |
1969 | case TK_M_ATTRS: | |
1970 | if (match_attr(rules, event->dev_parent, event, key) != 0) | |
1971 | goto try_parent; | |
1972 | break; | |
1973 | case TK_M_TAGS: { | |
1974 | bool match = udev_device_has_tag(event->dev_parent, rules_str(rules, cur->key.value_off)); | |
1975 | ||
1976 | if (match && key->key.op == OP_NOMATCH) | |
1977 | goto try_parent; | |
1978 | if (!match && key->key.op == OP_MATCH) | |
1979 | goto try_parent; | |
1980 | break; | |
1981 | } | |
1982 | default: | |
1983 | goto nomatch; | |
1984 | } | |
1985 | } | |
1986 | break; | |
1987 | ||
1988 | try_parent: | |
1989 | event->dev_parent = udev_device_get_parent(event->dev_parent); | |
1990 | if (event->dev_parent == NULL) | |
1991 | goto nomatch; | |
1992 | } | |
1993 | /* move behind our sequence of parent match keys */ | |
1994 | cur = next; | |
1995 | continue; | |
1996 | } | |
1997 | case TK_M_TEST: { | |
1998 | char filename[UTIL_PATH_SIZE]; | |
1999 | struct stat statbuf; | |
2000 | int match; | |
2001 | ||
2002 | udev_event_apply_format(event, rules_str(rules, cur->key.value_off), filename, sizeof(filename)); | |
2003 | if (util_resolve_subsys_kernel(event->udev, filename, filename, sizeof(filename), 0) != 0) { | |
2004 | if (filename[0] != '/') { | |
2005 | char tmp[UTIL_PATH_SIZE]; | |
2006 | ||
2007 | strscpy(tmp, sizeof(tmp), filename); | |
2008 | strscpyl(filename, sizeof(filename), | |
2009 | udev_device_get_syspath(event->dev), "/", tmp, NULL); | |
2010 | } | |
2011 | } | |
2012 | attr_subst_subdir(filename, sizeof(filename)); | |
2013 | ||
2014 | match = (stat(filename, &statbuf) == 0); | |
2015 | if (match && cur->key.mode > 0) | |
2016 | match = ((statbuf.st_mode & cur->key.mode) > 0); | |
2017 | if (match && cur->key.op == OP_NOMATCH) | |
2018 | goto nomatch; | |
2019 | if (!match && cur->key.op == OP_MATCH) | |
2020 | goto nomatch; | |
2021 | break; | |
2022 | } | |
2023 | case TK_M_EVENT_TIMEOUT: | |
60f067b4 | 2024 | log_debug("OPTIONS event_timeout=%u", cur->key.event_timeout); |
663996b3 MS |
2025 | event->timeout_usec = cur->key.event_timeout * 1000 * 1000; |
2026 | break; | |
2027 | case TK_M_PROGRAM: { | |
2028 | char program[UTIL_PATH_SIZE]; | |
2029 | char **envp; | |
60f067b4 | 2030 | char result[UTIL_LINE_SIZE]; |
663996b3 MS |
2031 | |
2032 | free(event->program_result); | |
2033 | event->program_result = NULL; | |
2034 | udev_event_apply_format(event, rules_str(rules, cur->key.value_off), program, sizeof(program)); | |
2035 | envp = udev_device_get_properties_envp(event->dev); | |
60f067b4 | 2036 | log_debug("PROGRAM '%s' %s:%u", |
663996b3 MS |
2037 | program, |
2038 | rules_str(rules, rule->rule.filename_off), | |
2039 | rule->rule.filename_line); | |
2040 | ||
2041 | if (udev_event_spawn(event, program, envp, sigmask, result, sizeof(result)) < 0) { | |
2042 | if (cur->key.op != OP_NOMATCH) | |
2043 | goto nomatch; | |
2044 | } else { | |
2045 | int count; | |
2046 | ||
2047 | util_remove_trailing_chars(result, '\n'); | |
2048 | if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) { | |
2049 | count = util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT); | |
2050 | if (count > 0) | |
60f067b4 | 2051 | log_debug("%i character(s) replaced" , count); |
663996b3 MS |
2052 | } |
2053 | event->program_result = strdup(result); | |
2054 | if (cur->key.op == OP_NOMATCH) | |
2055 | goto nomatch; | |
2056 | } | |
2057 | break; | |
2058 | } | |
2059 | case TK_M_IMPORT_FILE: { | |
2060 | char import[UTIL_PATH_SIZE]; | |
2061 | ||
2062 | udev_event_apply_format(event, rules_str(rules, cur->key.value_off), import, sizeof(import)); | |
2063 | if (import_file_into_properties(event->dev, import) != 0) | |
2064 | if (cur->key.op != OP_NOMATCH) | |
2065 | goto nomatch; | |
2066 | break; | |
2067 | } | |
2068 | case TK_M_IMPORT_PROG: { | |
2069 | char import[UTIL_PATH_SIZE]; | |
2070 | ||
2071 | udev_event_apply_format(event, rules_str(rules, cur->key.value_off), import, sizeof(import)); | |
60f067b4 | 2072 | log_debug("IMPORT '%s' %s:%u", |
663996b3 MS |
2073 | import, |
2074 | rules_str(rules, rule->rule.filename_off), | |
2075 | rule->rule.filename_line); | |
2076 | ||
2077 | if (import_program_into_properties(event, import, sigmask) != 0) | |
2078 | if (cur->key.op != OP_NOMATCH) | |
2079 | goto nomatch; | |
2080 | break; | |
2081 | } | |
2082 | case TK_M_IMPORT_BUILTIN: { | |
2083 | char command[UTIL_PATH_SIZE]; | |
2084 | ||
2085 | if (udev_builtin_run_once(cur->key.builtin_cmd)) { | |
2086 | /* check if we ran already */ | |
2087 | if (event->builtin_run & (1 << cur->key.builtin_cmd)) { | |
60f067b4 | 2088 | log_debug("IMPORT builtin skip '%s' %s:%u", |
663996b3 MS |
2089 | udev_builtin_name(cur->key.builtin_cmd), |
2090 | rules_str(rules, rule->rule.filename_off), | |
2091 | rule->rule.filename_line); | |
2092 | /* return the result from earlier run */ | |
2093 | if (event->builtin_ret & (1 << cur->key.builtin_cmd)) | |
2094 | if (cur->key.op != OP_NOMATCH) | |
2095 | goto nomatch; | |
2096 | break; | |
2097 | } | |
2098 | /* mark as ran */ | |
2099 | event->builtin_run |= (1 << cur->key.builtin_cmd); | |
2100 | } | |
2101 | ||
2102 | udev_event_apply_format(event, rules_str(rules, cur->key.value_off), command, sizeof(command)); | |
60f067b4 | 2103 | log_debug("IMPORT builtin '%s' %s:%u", |
663996b3 MS |
2104 | udev_builtin_name(cur->key.builtin_cmd), |
2105 | rules_str(rules, rule->rule.filename_off), | |
2106 | rule->rule.filename_line); | |
2107 | ||
2108 | if (udev_builtin_run(event->dev, cur->key.builtin_cmd, command, false) != 0) { | |
2109 | /* remember failure */ | |
60f067b4 | 2110 | log_debug("IMPORT builtin '%s' returned non-zero", |
663996b3 MS |
2111 | udev_builtin_name(cur->key.builtin_cmd)); |
2112 | event->builtin_ret |= (1 << cur->key.builtin_cmd); | |
2113 | if (cur->key.op != OP_NOMATCH) | |
2114 | goto nomatch; | |
2115 | } | |
2116 | break; | |
2117 | } | |
2118 | case TK_M_IMPORT_DB: { | |
2119 | const char *key = rules_str(rules, cur->key.value_off); | |
2120 | const char *value; | |
2121 | ||
2122 | value = udev_device_get_property_value(event->dev_db, key); | |
2123 | if (value != NULL) { | |
2124 | struct udev_list_entry *entry; | |
2125 | ||
2126 | entry = udev_device_add_property(event->dev, key, value); | |
2127 | udev_list_entry_set_num(entry, true); | |
2128 | } else { | |
2129 | if (cur->key.op != OP_NOMATCH) | |
2130 | goto nomatch; | |
2131 | } | |
2132 | break; | |
2133 | } | |
2134 | case TK_M_IMPORT_CMDLINE: { | |
2135 | FILE *f; | |
2136 | bool imported = false; | |
2137 | ||
2138 | f = fopen("/proc/cmdline", "re"); | |
2139 | if (f != NULL) { | |
2140 | char cmdline[4096]; | |
2141 | ||
2142 | if (fgets(cmdline, sizeof(cmdline), f) != NULL) { | |
2143 | const char *key = rules_str(rules, cur->key.value_off); | |
2144 | char *pos; | |
2145 | ||
2146 | pos = strstr(cmdline, key); | |
2147 | if (pos != NULL) { | |
2148 | struct udev_list_entry *entry; | |
2149 | ||
2150 | pos += strlen(key); | |
2151 | if (pos[0] == '\0' || isspace(pos[0])) { | |
2152 | /* we import simple flags as 'FLAG=1' */ | |
2153 | entry = udev_device_add_property(event->dev, key, "1"); | |
2154 | udev_list_entry_set_num(entry, true); | |
2155 | imported = true; | |
2156 | } else if (pos[0] == '=') { | |
2157 | const char *value; | |
2158 | ||
2159 | pos++; | |
2160 | value = pos; | |
2161 | while (pos[0] != '\0' && !isspace(pos[0])) | |
2162 | pos++; | |
2163 | pos[0] = '\0'; | |
2164 | entry = udev_device_add_property(event->dev, key, value); | |
2165 | udev_list_entry_set_num(entry, true); | |
2166 | imported = true; | |
2167 | } | |
2168 | } | |
2169 | } | |
2170 | fclose(f); | |
2171 | } | |
2172 | if (!imported && cur->key.op != OP_NOMATCH) | |
2173 | goto nomatch; | |
2174 | break; | |
2175 | } | |
2176 | case TK_M_IMPORT_PARENT: { | |
2177 | char import[UTIL_PATH_SIZE]; | |
2178 | ||
2179 | udev_event_apply_format(event, rules_str(rules, cur->key.value_off), import, sizeof(import)); | |
2180 | if (import_parent_into_properties(event->dev, import) != 0) | |
2181 | if (cur->key.op != OP_NOMATCH) | |
2182 | goto nomatch; | |
2183 | break; | |
2184 | } | |
2185 | case TK_M_RESULT: | |
2186 | if (match_key(rules, cur, event->program_result) != 0) | |
2187 | goto nomatch; | |
2188 | break; | |
2189 | case TK_A_STRING_ESCAPE_NONE: | |
2190 | esc = ESCAPE_NONE; | |
2191 | break; | |
2192 | case TK_A_STRING_ESCAPE_REPLACE: | |
2193 | esc = ESCAPE_REPLACE; | |
2194 | break; | |
2195 | case TK_A_DB_PERSIST: | |
2196 | udev_device_set_db_persist(event->dev); | |
2197 | break; | |
2198 | case TK_A_INOTIFY_WATCH: | |
2199 | if (event->inotify_watch_final) | |
2200 | break; | |
2201 | if (cur->key.op == OP_ASSIGN_FINAL) | |
2202 | event->inotify_watch_final = true; | |
2203 | event->inotify_watch = cur->key.watch; | |
2204 | break; | |
2205 | case TK_A_DEVLINK_PRIO: | |
2206 | udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio); | |
2207 | break; | |
2208 | case TK_A_OWNER: { | |
2209 | char owner[UTIL_NAME_SIZE]; | |
2210 | ||
2211 | if (event->owner_final) | |
2212 | break; | |
2213 | if (cur->key.op == OP_ASSIGN_FINAL) | |
2214 | event->owner_final = true; | |
2215 | udev_event_apply_format(event, rules_str(rules, cur->key.value_off), owner, sizeof(owner)); | |
2216 | event->owner_set = true; | |
2217 | event->uid = util_lookup_user(event->udev, owner); | |
60f067b4 | 2218 | log_debug("OWNER %u %s:%u", |
663996b3 MS |
2219 | event->uid, |
2220 | rules_str(rules, rule->rule.filename_off), | |
2221 | rule->rule.filename_line); | |
2222 | break; | |
2223 | } | |
2224 | case TK_A_GROUP: { | |
2225 | char group[UTIL_NAME_SIZE]; | |
2226 | ||
2227 | if (event->group_final) | |
2228 | break; | |
2229 | if (cur->key.op == OP_ASSIGN_FINAL) | |
2230 | event->group_final = true; | |
2231 | udev_event_apply_format(event, rules_str(rules, cur->key.value_off), group, sizeof(group)); | |
2232 | event->group_set = true; | |
2233 | event->gid = util_lookup_group(event->udev, group); | |
60f067b4 | 2234 | log_debug("GROUP %u %s:%u", |
663996b3 MS |
2235 | event->gid, |
2236 | rules_str(rules, rule->rule.filename_off), | |
2237 | rule->rule.filename_line); | |
2238 | break; | |
2239 | } | |
2240 | case TK_A_MODE: { | |
2241 | char mode_str[UTIL_NAME_SIZE]; | |
2242 | mode_t mode; | |
2243 | char *endptr; | |
2244 | ||
2245 | if (event->mode_final) | |
2246 | break; | |
2247 | udev_event_apply_format(event, rules_str(rules, cur->key.value_off), mode_str, sizeof(mode_str)); | |
2248 | mode = strtol(mode_str, &endptr, 8); | |
2249 | if (endptr[0] != '\0') { | |
60f067b4 | 2250 | log_error("ignoring invalid mode '%s'", mode_str); |
663996b3 MS |
2251 | break; |
2252 | } | |
2253 | if (cur->key.op == OP_ASSIGN_FINAL) | |
2254 | event->mode_final = true; | |
2255 | event->mode_set = true; | |
2256 | event->mode = mode; | |
60f067b4 | 2257 | log_debug("MODE %#o %s:%u", |
663996b3 MS |
2258 | event->mode, |
2259 | rules_str(rules, rule->rule.filename_off), | |
2260 | rule->rule.filename_line); | |
2261 | break; | |
2262 | } | |
2263 | case TK_A_OWNER_ID: | |
2264 | if (event->owner_final) | |
2265 | break; | |
2266 | if (cur->key.op == OP_ASSIGN_FINAL) | |
2267 | event->owner_final = true; | |
2268 | event->owner_set = true; | |
2269 | event->uid = cur->key.uid; | |
60f067b4 | 2270 | log_debug("OWNER %u %s:%u", |
663996b3 MS |
2271 | event->uid, |
2272 | rules_str(rules, rule->rule.filename_off), | |
2273 | rule->rule.filename_line); | |
2274 | break; | |
2275 | case TK_A_GROUP_ID: | |
2276 | if (event->group_final) | |
2277 | break; | |
2278 | if (cur->key.op == OP_ASSIGN_FINAL) | |
2279 | event->group_final = true; | |
2280 | event->group_set = true; | |
2281 | event->gid = cur->key.gid; | |
60f067b4 | 2282 | log_debug("GROUP %u %s:%u", |
663996b3 MS |
2283 | event->gid, |
2284 | rules_str(rules, rule->rule.filename_off), | |
2285 | rule->rule.filename_line); | |
2286 | break; | |
2287 | case TK_A_MODE_ID: | |
2288 | if (event->mode_final) | |
2289 | break; | |
2290 | if (cur->key.op == OP_ASSIGN_FINAL) | |
2291 | event->mode_final = true; | |
2292 | event->mode_set = true; | |
2293 | event->mode = cur->key.mode; | |
60f067b4 | 2294 | log_debug("MODE %#o %s:%u", |
663996b3 MS |
2295 | event->mode, |
2296 | rules_str(rules, rule->rule.filename_off), | |
2297 | rule->rule.filename_line); | |
2298 | break; | |
60f067b4 JS |
2299 | case TK_A_SECLABEL: { |
2300 | const char *name, *label; | |
2301 | ||
2302 | name = rules_str(rules, cur->key.attr_off); | |
2303 | label = rules_str(rules, cur->key.value_off); | |
2304 | if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL) | |
2305 | udev_list_cleanup(&event->seclabel_list); | |
2306 | udev_list_entry_add(&event->seclabel_list, name, label); | |
2307 | log_debug("SECLABEL{%s}='%s' %s:%u", | |
2308 | name, label, | |
2309 | rules_str(rules, rule->rule.filename_off), | |
2310 | rule->rule.filename_line); | |
2311 | break; | |
2312 | } | |
663996b3 MS |
2313 | case TK_A_ENV: { |
2314 | const char *name = rules_str(rules, cur->key.attr_off); | |
2315 | char *value = rules_str(rules, cur->key.value_off); | |
2316 | char value_new[UTIL_NAME_SIZE]; | |
2317 | const char *value_old = NULL; | |
2318 | struct udev_list_entry *entry; | |
2319 | ||
2320 | if (value[0] == '\0') { | |
2321 | if (cur->key.op == OP_ADD) | |
2322 | break; | |
2323 | udev_device_add_property(event->dev, name, NULL); | |
2324 | break; | |
2325 | } | |
2326 | ||
2327 | if (cur->key.op == OP_ADD) | |
2328 | value_old = udev_device_get_property_value(event->dev, name); | |
2329 | if (value_old) { | |
2330 | char temp[UTIL_NAME_SIZE]; | |
2331 | ||
2332 | /* append value separated by space */ | |
2333 | udev_event_apply_format(event, value, temp, sizeof(temp)); | |
2334 | strscpyl(value_new, sizeof(value_new), value_old, " ", temp, NULL); | |
2335 | } else | |
2336 | udev_event_apply_format(event, value, value_new, sizeof(value_new)); | |
2337 | ||
2338 | entry = udev_device_add_property(event->dev, name, value_new); | |
2339 | /* store in db, skip private keys */ | |
2340 | if (name[0] != '.') | |
2341 | udev_list_entry_set_num(entry, true); | |
2342 | break; | |
2343 | } | |
2344 | case TK_A_TAG: { | |
2345 | char tag[UTIL_PATH_SIZE]; | |
2346 | const char *p; | |
2347 | ||
2348 | udev_event_apply_format(event, rules_str(rules, cur->key.value_off), tag, sizeof(tag)); | |
2349 | if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL) | |
2350 | udev_device_cleanup_tags_list(event->dev); | |
2351 | for (p = tag; *p != '\0'; p++) { | |
2352 | if ((*p >= 'a' && *p <= 'z') || | |
2353 | (*p >= 'A' && *p <= 'Z') || | |
2354 | (*p >= '0' && *p <= '9') || | |
2355 | *p == '-' || *p == '_') | |
2356 | continue; | |
60f067b4 | 2357 | log_error("ignoring invalid tag name '%s'", tag); |
663996b3 MS |
2358 | break; |
2359 | } | |
2360 | udev_device_add_tag(event->dev, tag); | |
2361 | break; | |
2362 | } | |
2363 | case TK_A_NAME: { | |
2364 | const char *name = rules_str(rules, cur->key.value_off); | |
2365 | ||
2366 | char name_str[UTIL_PATH_SIZE]; | |
2367 | int count; | |
2368 | ||
2369 | if (event->name_final) | |
2370 | break; | |
2371 | if (cur->key.op == OP_ASSIGN_FINAL) | |
2372 | event->name_final = true; | |
2373 | udev_event_apply_format(event, name, name_str, sizeof(name_str)); | |
2374 | if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) { | |
2375 | count = util_replace_chars(name_str, "/"); | |
2376 | if (count > 0) | |
60f067b4 | 2377 | log_debug("%i character(s) replaced", count); |
663996b3 MS |
2378 | } |
2379 | if (major(udev_device_get_devnum(event->dev)) && | |
2380 | (!streq(name_str, udev_device_get_devnode(event->dev) + strlen("/dev/")))) { | |
2381 | log_error("NAME=\"%s\" ignored, kernel device nodes " | |
2382 | "can not be renamed; please fix it in %s:%u\n", name, | |
2383 | rules_str(rules, rule->rule.filename_off), rule->rule.filename_line); | |
2384 | break; | |
2385 | } | |
2386 | free(event->name); | |
2387 | event->name = strdup(name_str); | |
60f067b4 | 2388 | log_debug("NAME '%s' %s:%u", |
663996b3 MS |
2389 | event->name, |
2390 | rules_str(rules, rule->rule.filename_off), | |
2391 | rule->rule.filename_line); | |
2392 | break; | |
2393 | } | |
2394 | case TK_A_DEVLINK: { | |
2395 | char temp[UTIL_PATH_SIZE]; | |
2396 | char filename[UTIL_PATH_SIZE]; | |
2397 | char *pos, *next; | |
2398 | int count = 0; | |
2399 | ||
2400 | if (event->devlink_final) | |
2401 | break; | |
2402 | if (major(udev_device_get_devnum(event->dev)) == 0) | |
2403 | break; | |
2404 | if (cur->key.op == OP_ASSIGN_FINAL) | |
2405 | event->devlink_final = true; | |
2406 | if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL) | |
2407 | udev_device_cleanup_devlinks_list(event->dev); | |
2408 | ||
2409 | /* allow multiple symlinks separated by spaces */ | |
2410 | udev_event_apply_format(event, rules_str(rules, cur->key.value_off), temp, sizeof(temp)); | |
2411 | if (esc == ESCAPE_UNSET) | |
2412 | count = util_replace_chars(temp, "/ "); | |
2413 | else if (esc == ESCAPE_REPLACE) | |
2414 | count = util_replace_chars(temp, "/"); | |
2415 | if (count > 0) | |
60f067b4 | 2416 | log_debug("%i character(s) replaced" , count); |
663996b3 MS |
2417 | pos = temp; |
2418 | while (isspace(pos[0])) | |
2419 | pos++; | |
2420 | next = strchr(pos, ' '); | |
2421 | while (next != NULL) { | |
2422 | next[0] = '\0'; | |
60f067b4 | 2423 | log_debug("LINK '%s' %s:%u", pos, |
663996b3 MS |
2424 | rules_str(rules, rule->rule.filename_off), rule->rule.filename_line); |
2425 | strscpyl(filename, sizeof(filename), "/dev/", pos, NULL); | |
2426 | udev_device_add_devlink(event->dev, filename); | |
2427 | while (isspace(next[1])) | |
2428 | next++; | |
2429 | pos = &next[1]; | |
2430 | next = strchr(pos, ' '); | |
2431 | } | |
2432 | if (pos[0] != '\0') { | |
60f067b4 | 2433 | log_debug("LINK '%s' %s:%u", pos, |
663996b3 MS |
2434 | rules_str(rules, rule->rule.filename_off), rule->rule.filename_line); |
2435 | strscpyl(filename, sizeof(filename), "/dev/", pos, NULL); | |
2436 | udev_device_add_devlink(event->dev, filename); | |
2437 | } | |
2438 | break; | |
2439 | } | |
2440 | case TK_A_ATTR: { | |
2441 | const char *key_name = rules_str(rules, cur->key.attr_off); | |
2442 | char attr[UTIL_PATH_SIZE]; | |
2443 | char value[UTIL_NAME_SIZE]; | |
2444 | FILE *f; | |
2445 | ||
2446 | if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0) | |
2447 | strscpyl(attr, sizeof(attr), udev_device_get_syspath(event->dev), "/", key_name, NULL); | |
2448 | attr_subst_subdir(attr, sizeof(attr)); | |
2449 | ||
2450 | udev_event_apply_format(event, rules_str(rules, cur->key.value_off), value, sizeof(value)); | |
60f067b4 | 2451 | log_debug("ATTR '%s' writing '%s' %s:%u", attr, value, |
663996b3 MS |
2452 | rules_str(rules, rule->rule.filename_off), |
2453 | rule->rule.filename_line); | |
2454 | f = fopen(attr, "we"); | |
2455 | if (f != NULL) { | |
2456 | if (fprintf(f, "%s", value) <= 0) | |
60f067b4 | 2457 | log_error("error writing ATTR{%s}: %m", attr); |
663996b3 MS |
2458 | fclose(f); |
2459 | } else { | |
60f067b4 | 2460 | log_error("error opening ATTR{%s} for writing: %m", attr); |
663996b3 MS |
2461 | } |
2462 | break; | |
2463 | } | |
2464 | case TK_A_RUN_BUILTIN: | |
2465 | case TK_A_RUN_PROGRAM: { | |
2466 | struct udev_list_entry *entry; | |
2467 | ||
2468 | if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL) | |
2469 | udev_list_cleanup(&event->run_list); | |
60f067b4 | 2470 | log_debug("RUN '%s' %s:%u", |
663996b3 MS |
2471 | rules_str(rules, cur->key.value_off), |
2472 | rules_str(rules, rule->rule.filename_off), | |
2473 | rule->rule.filename_line); | |
2474 | entry = udev_list_entry_add(&event->run_list, rules_str(rules, cur->key.value_off), NULL); | |
2475 | udev_list_entry_set_num(entry, cur->key.builtin_cmd); | |
2476 | break; | |
2477 | } | |
2478 | case TK_A_GOTO: | |
2479 | if (cur->key.rule_goto == 0) | |
2480 | break; | |
2481 | cur = &rules->tokens[cur->key.rule_goto]; | |
2482 | continue; | |
2483 | case TK_END: | |
2484 | return 0; | |
2485 | ||
2486 | case TK_M_PARENTS_MIN: | |
2487 | case TK_M_PARENTS_MAX: | |
2488 | case TK_M_MAX: | |
2489 | case TK_UNSET: | |
60f067b4 | 2490 | log_error("wrong type %u", cur->type); |
663996b3 MS |
2491 | goto nomatch; |
2492 | } | |
2493 | ||
2494 | cur++; | |
2495 | continue; | |
2496 | nomatch: | |
2497 | /* fast-forward to next rule */ | |
2498 | cur = rule + rule->rule.token_count; | |
2499 | } | |
2500 | } | |
2501 | ||
14228c0d | 2502 | int udev_rules_apply_static_dev_perms(struct udev_rules *rules) |
663996b3 MS |
2503 | { |
2504 | struct token *cur; | |
2505 | struct token *rule; | |
2506 | uid_t uid = 0; | |
2507 | gid_t gid = 0; | |
2508 | mode_t mode = 0; | |
14228c0d MB |
2509 | _cleanup_strv_free_ char **tags = NULL; |
2510 | char **t; | |
2511 | FILE *f = NULL; | |
2512 | _cleanup_free_ char *path = NULL; | |
2513 | int r = 0; | |
663996b3 MS |
2514 | |
2515 | if (rules->tokens == NULL) | |
14228c0d | 2516 | return 0; |
663996b3 MS |
2517 | |
2518 | cur = &rules->tokens[0]; | |
2519 | rule = cur; | |
2520 | for (;;) { | |
2521 | switch (cur->type) { | |
2522 | case TK_RULE: | |
2523 | /* current rule */ | |
2524 | rule = cur; | |
2525 | ||
2526 | /* skip rules without a static_node tag */ | |
2527 | if (!rule->rule.has_static_node) | |
2528 | goto next; | |
2529 | ||
2530 | uid = 0; | |
2531 | gid = 0; | |
2532 | mode = 0; | |
14228c0d MB |
2533 | strv_free(tags); |
2534 | tags = NULL; | |
663996b3 MS |
2535 | break; |
2536 | case TK_A_OWNER_ID: | |
2537 | uid = cur->key.uid; | |
2538 | break; | |
2539 | case TK_A_GROUP_ID: | |
2540 | gid = cur->key.gid; | |
2541 | break; | |
2542 | case TK_A_MODE_ID: | |
2543 | mode = cur->key.mode; | |
14228c0d MB |
2544 | break; |
2545 | case TK_A_TAG: | |
2546 | r = strv_extend(&tags, rules_str(rules, cur->key.value_off)); | |
2547 | if (r < 0) | |
2548 | goto finish; | |
2549 | ||
663996b3 MS |
2550 | break; |
2551 | case TK_A_STATIC_NODE: { | |
14228c0d MB |
2552 | char device_node[UTIL_PATH_SIZE]; |
2553 | char tags_dir[UTIL_PATH_SIZE]; | |
2554 | char tag_symlink[UTIL_PATH_SIZE]; | |
663996b3 MS |
2555 | struct stat stats; |
2556 | ||
2557 | /* we assure, that the permissions tokens are sorted before the static token */ | |
60f067b4 | 2558 | |
14228c0d | 2559 | if (mode == 0 && uid == 0 && gid == 0 && tags == NULL) |
663996b3 | 2560 | goto next; |
60f067b4 | 2561 | |
14228c0d MB |
2562 | strscpyl(device_node, sizeof(device_node), "/dev/", rules_str(rules, cur->key.value_off), NULL); |
2563 | if (stat(device_node, &stats) != 0) | |
60f067b4 | 2564 | break; |
663996b3 | 2565 | if (!S_ISBLK(stats.st_mode) && !S_ISCHR(stats.st_mode)) |
60f067b4 | 2566 | break; |
14228c0d | 2567 | |
60f067b4 | 2568 | /* export the tags to a directory as symlinks, allowing otherwise dead nodes to be tagged */ |
14228c0d | 2569 | if (tags) { |
14228c0d MB |
2570 | STRV_FOREACH(t, tags) { |
2571 | _cleanup_free_ char *unescaped_filename = NULL; | |
2572 | ||
2573 | strscpyl(tags_dir, sizeof(tags_dir), "/run/udev/static_node-tags/", *t, "/", NULL); | |
2574 | r = mkdir_p(tags_dir, 0755); | |
2575 | if (r < 0) { | |
60f067b4 | 2576 | log_error("failed to create %s: %s", tags_dir, strerror(-r)); |
14228c0d MB |
2577 | return r; |
2578 | } | |
2579 | ||
2580 | unescaped_filename = xescape(rules_str(rules, cur->key.value_off), "/."); | |
2581 | ||
2582 | strscpyl(tag_symlink, sizeof(tag_symlink), tags_dir, unescaped_filename, NULL); | |
2583 | r = symlink(device_node, tag_symlink); | |
2584 | if (r < 0 && errno != EEXIST) { | |
60f067b4 | 2585 | log_error("failed to create symlink %s -> %s: %m", tag_symlink, device_node); |
14228c0d MB |
2586 | return -errno; |
2587 | } else | |
2588 | r = 0; | |
2589 | } | |
2590 | } | |
2591 | ||
2592 | /* don't touch the permissions if only the tags were set */ | |
2593 | if (mode == 0 && uid == 0 && gid == 0) | |
60f067b4 | 2594 | break; |
14228c0d | 2595 | |
663996b3 MS |
2596 | if (mode == 0) { |
2597 | if (gid > 0) | |
2598 | mode = 0660; | |
2599 | else | |
2600 | mode = 0600; | |
2601 | } | |
2602 | if (mode != (stats.st_mode & 01777)) { | |
14228c0d MB |
2603 | r = chmod(device_node, mode); |
2604 | if (r < 0) { | |
60f067b4 | 2605 | log_error("failed to chmod '%s' %#o", device_node, mode); |
14228c0d MB |
2606 | return -errno; |
2607 | } else | |
60f067b4 | 2608 | log_debug("chmod '%s' %#o", device_node, mode); |
663996b3 MS |
2609 | } |
2610 | ||
2611 | if ((uid != 0 && uid != stats.st_uid) || (gid != 0 && gid != stats.st_gid)) { | |
14228c0d MB |
2612 | r = chown(device_node, uid, gid); |
2613 | if (r < 0) { | |
60f067b4 | 2614 | log_error("failed to chown '%s' %u %u ", device_node, uid, gid); |
14228c0d MB |
2615 | return -errno; |
2616 | } else | |
60f067b4 | 2617 | log_debug("chown '%s' %u %u", device_node, uid, gid); |
663996b3 MS |
2618 | } |
2619 | ||
14228c0d | 2620 | utimensat(AT_FDCWD, device_node, NULL, 0); |
663996b3 MS |
2621 | break; |
2622 | } | |
2623 | case TK_END: | |
14228c0d | 2624 | goto finish; |
663996b3 MS |
2625 | } |
2626 | ||
2627 | cur++; | |
2628 | continue; | |
2629 | next: | |
2630 | /* fast-forward to next rule */ | |
2631 | cur = rule + rule->rule.token_count; | |
2632 | continue; | |
2633 | } | |
14228c0d MB |
2634 | |
2635 | finish: | |
2636 | if (f) { | |
2637 | fflush(f); | |
2638 | fchmod(fileno(f), 0644); | |
2639 | if (ferror(f) || rename(path, "/run/udev/static_node-tags") < 0) { | |
2640 | r = -errno; | |
2641 | unlink("/run/udev/static_node-tags"); | |
2642 | unlink(path); | |
2643 | } | |
2644 | fclose(f); | |
2645 | } | |
2646 | ||
2647 | return r; | |
663996b3 | 2648 | } |