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2232cac8 | 1 | /* |
5539f624 | 2 | * Copyright (C) 2003-2010 Kay Sievers <kay.sievers@vrfy.org> |
023ed7b0 | 3 | * Copyright (C) 2008 Alan Jenkins <alan-jenkins@tuffmail.co.uk> |
2232cac8 | 4 | * |
55e9959b KS |
5 | * This program is free software: you can redistribute it and/or modify |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation, either version 2 of the License, or | |
8 | * (at your option) any later version. | |
3d6d12c6 | 9 | * |
55e9959b KS |
10 | * This program is distributed in the hope that it will be useful, |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
2232cac8 | 14 | * |
55e9959b KS |
15 | * You should have received a copy of the GNU General Public License |
16 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
2232cac8 GKH |
17 | */ |
18 | ||
19 | #include <stddef.h> | |
1449a55d | 20 | #include <limits.h> |
2232cac8 | 21 | #include <stdlib.h> |
6d87ee2e | 22 | #include <stdbool.h> |
2232cac8 GKH |
23 | #include <string.h> |
24 | #include <stdio.h> | |
25 | #include <fcntl.h> | |
26 | #include <ctype.h> | |
27 | #include <unistd.h> | |
28 | #include <errno.h> | |
5ee7ecfb | 29 | #include <dirent.h> |
cea61f5c | 30 | #include <fnmatch.h> |
959e8b5d | 31 | #include <time.h> |
2232cac8 | 32 | |
2232cac8 | 33 | #include "udev.h" |
2232cac8 | 34 | |
6880b25d KS |
35 | #define PREALLOC_TOKEN 2048 |
36 | #define PREALLOC_STRBUF 32 * 1024 | |
1449a55d | 37 | #define PREALLOC_TRIE 256 |
c7521974 | 38 | |
4052400f KS |
39 | struct uid_gid { |
40 | unsigned int name_off; | |
41 | union { | |
42 | uid_t uid; | |
43 | gid_t gid; | |
44 | }; | |
45 | }; | |
46 | ||
1449a55d | 47 | struct trie_node { |
023ed7b0 | 48 | /* this node's first child */ |
bcf44d55 | 49 | unsigned int child_idx; |
023ed7b0 KS |
50 | /* the next child of our parent node's child list */ |
51 | unsigned int next_child_idx; | |
52 | /* this node's last child (shortcut for append) */ | |
bcf44d55 | 53 | unsigned int last_child_idx; |
1449a55d | 54 | unsigned int value_off; |
bcf44d55 | 55 | unsigned short value_len; |
023ed7b0 | 56 | unsigned char key; |
1449a55d AJ |
57 | }; |
58 | ||
4052400f KS |
59 | struct udev_rules { |
60 | struct udev *udev; | |
61 | int resolve_names; | |
62 | ||
63 | /* every key in the rules file becomes a token */ | |
64 | struct token *tokens; | |
65 | unsigned int token_cur; | |
66 | unsigned int token_max; | |
67 | ||
68 | /* all key strings are copied to a single string buffer */ | |
69 | char *buf; | |
70 | size_t buf_cur; | |
71 | size_t buf_max; | |
72 | unsigned int buf_count; | |
73 | ||
bcf44d55 | 74 | /* during rule parsing, strings are indexed to find duplicates */ |
bcf44d55 KS |
75 | struct trie_node *trie_nodes; |
76 | unsigned int trie_nodes_cur; | |
77 | unsigned int trie_nodes_max; | |
1449a55d | 78 | |
bcf44d55 | 79 | /* during rule parsing, uid/gid lookup results are cached */ |
4052400f KS |
80 | struct uid_gid *uids; |
81 | unsigned int uids_cur; | |
82 | unsigned int uids_max; | |
83 | struct uid_gid *gids; | |
84 | unsigned int gids_cur; | |
85 | unsigned int gids_max; | |
86 | }; | |
87 | ||
1449a55d | 88 | /* KEY=="", KEY!="", KEY+="", KEY="", KEY:="" */ |
b0f7409f KS |
89 | enum operation_type { |
90 | OP_UNSET, | |
91 | ||
92 | OP_MATCH, | |
93 | OP_NOMATCH, | |
94 | OP_MATCH_MAX, | |
95 | ||
96 | OP_ADD, | |
97 | OP_ASSIGN, | |
98 | OP_ASSIGN_FINAL, | |
c7521974 KS |
99 | }; |
100 | ||
ac218d9c KS |
101 | enum string_glob_type { |
102 | GL_UNSET, | |
db463fd3 KS |
103 | GL_PLAIN, /* no special chars */ |
104 | GL_GLOB, /* shell globs ?,*,[] */ | |
105 | GL_SPLIT, /* multi-value A|B */ | |
106 | GL_SPLIT_GLOB, /* multi-value with glob A*|B* */ | |
107 | GL_SOMETHING, /* commonly used "?*" */ | |
ac218d9c KS |
108 | }; |
109 | ||
32028733 KS |
110 | enum string_subst_type { |
111 | SB_UNSET, | |
112 | SB_NONE, | |
113 | SB_FORMAT, | |
114 | SB_SUBSYS, | |
115 | }; | |
116 | ||
154a7b84 | 117 | /* tokens of a rule are sorted/handled in this order */ |
6880b25d | 118 | enum token_type { |
ac218d9c | 119 | TK_UNSET, |
6880b25d KS |
120 | TK_RULE, |
121 | ||
6880b25d KS |
122 | TK_M_ACTION, /* val */ |
123 | TK_M_DEVPATH, /* val */ | |
124 | TK_M_KERNEL, /* val */ | |
125 | TK_M_DEVLINK, /* val */ | |
126 | TK_M_NAME, /* val */ | |
127 | TK_M_ENV, /* val, attr */ | |
3f896a2a | 128 | TK_M_TAG, /* val */ |
6880b25d KS |
129 | TK_M_SUBSYSTEM, /* val */ |
130 | TK_M_DRIVER, /* val */ | |
7aeeaedc | 131 | TK_M_WAITFOR, /* val */ |
6880b25d KS |
132 | TK_M_ATTR, /* val, attr */ |
133 | ||
d15fcce4 | 134 | TK_M_PARENTS_MIN, |
6880b25d KS |
135 | TK_M_KERNELS, /* val */ |
136 | TK_M_SUBSYSTEMS, /* val */ | |
137 | TK_M_DRIVERS, /* val */ | |
138 | TK_M_ATTRS, /* val, attr */ | |
7df0ed83 | 139 | TK_M_TAGS, /* val */ |
b0f7409f | 140 | TK_M_PARENTS_MAX, |
6880b25d KS |
141 | |
142 | TK_M_TEST, /* val, mode_t */ | |
2181d30a | 143 | TK_M_EVENT_TIMEOUT, /* int */ |
6880b25d KS |
144 | TK_M_PROGRAM, /* val */ |
145 | TK_M_IMPORT_FILE, /* val */ | |
146 | TK_M_IMPORT_PROG, /* val */ | |
5539f624 | 147 | TK_M_IMPORT_DB, /* val */ |
c4f6dcc4 | 148 | TK_M_IMPORT_CMDLINE, /* val */ |
6880b25d KS |
149 | TK_M_IMPORT_PARENT, /* val */ |
150 | TK_M_RESULT, /* val */ | |
ac218d9c | 151 | TK_M_MAX, |
6880b25d | 152 | |
6880b25d KS |
153 | TK_A_STRING_ESCAPE_NONE, |
154 | TK_A_STRING_ESCAPE_REPLACE, | |
9ead6627 | 155 | TK_A_DB_PERSIST, |
46f194cb | 156 | TK_A_INOTIFY_WATCH, /* int */ |
6880b25d KS |
157 | TK_A_DEVLINK_PRIO, /* int */ |
158 | TK_A_OWNER, /* val */ | |
159 | TK_A_GROUP, /* val */ | |
160 | TK_A_MODE, /* val */ | |
161 | TK_A_OWNER_ID, /* uid_t */ | |
162 | TK_A_GROUP_ID, /* gid_t */ | |
163 | TK_A_MODE_ID, /* mode_t */ | |
761dfddc | 164 | TK_A_STATIC_NODE, /* val */ |
6880b25d | 165 | TK_A_ENV, /* val, attr */ |
28460195 | 166 | TK_A_TAG, /* val */ |
6880b25d KS |
167 | TK_A_NAME, /* val */ |
168 | TK_A_DEVLINK, /* val */ | |
6880b25d KS |
169 | TK_A_ATTR, /* val, attr */ |
170 | TK_A_RUN, /* val, bool */ | |
171 | TK_A_GOTO, /* size_t */ | |
6880b25d KS |
172 | |
173 | TK_END, | |
c7521974 KS |
174 | }; |
175 | ||
3f3aa9f5 | 176 | /* we try to pack stuff in a way that we take only 12 bytes per token */ |
4052400f KS |
177 | struct token { |
178 | union { | |
761dfddc | 179 | unsigned char type; /* same in rule and key */ |
4052400f | 180 | struct { |
a25d547d | 181 | enum token_type type:8; |
761dfddc KS |
182 | bool can_set_name:1; |
183 | bool has_static_node:1; | |
184 | unsigned int unused:6; | |
3f3aa9f5 | 185 | unsigned short token_count; |
4052400f KS |
186 | unsigned int label_off; |
187 | unsigned short filename_off; | |
188 | unsigned short filename_line; | |
189 | } rule; | |
190 | struct { | |
a25d547d KS |
191 | enum token_type type:8; |
192 | enum operation_type op:8; | |
193 | enum string_glob_type glob:8; | |
32028733 KS |
194 | enum string_subst_type subst:4; |
195 | enum string_subst_type attrsubst:4; | |
4052400f KS |
196 | unsigned int value_off; |
197 | union { | |
198 | unsigned int attr_off; | |
6c29f2b9 KS |
199 | int devlink_unique; |
200 | int fail_on_error; | |
4052400f KS |
201 | unsigned int rule_goto; |
202 | mode_t mode; | |
203 | uid_t uid; | |
204 | gid_t gid; | |
4052400f KS |
205 | int devlink_prio; |
206 | int event_timeout; | |
46f194cb | 207 | int watch; |
4052400f KS |
208 | }; |
209 | } key; | |
210 | }; | |
211 | }; | |
212 | ||
213 | #define MAX_TK 64 | |
214 | struct rule_tmp { | |
215 | struct udev_rules *rules; | |
216 | struct token rule; | |
217 | struct token token[MAX_TK]; | |
218 | unsigned int token_cur; | |
219 | }; | |
220 | ||
045a3bc8 | 221 | #ifdef ENABLE_DEBUG |
5d6a1fa6 KS |
222 | static const char *operation_str(enum operation_type type) |
223 | { | |
224 | static const char *operation_strs[] = { | |
225 | [OP_UNSET] = "UNSET", | |
226 | [OP_MATCH] = "match", | |
227 | [OP_NOMATCH] = "nomatch", | |
228 | [OP_MATCH_MAX] = "MATCH_MAX", | |
229 | ||
230 | [OP_ADD] = "add", | |
231 | [OP_ASSIGN] = "assign", | |
232 | [OP_ASSIGN_FINAL] = "assign-final", | |
233 | } ; | |
234 | ||
235 | return operation_strs[type]; | |
236 | } | |
4052400f | 237 | |
5d6a1fa6 KS |
238 | static const char *string_glob_str(enum string_glob_type type) |
239 | { | |
240 | static const char *string_glob_strs[] = { | |
241 | [GL_UNSET] = "UNSET", | |
242 | [GL_PLAIN] = "plain", | |
243 | [GL_GLOB] = "glob", | |
244 | [GL_SPLIT] = "split", | |
245 | [GL_SPLIT_GLOB] = "split-glob", | |
246 | [GL_SOMETHING] = "split-glob", | |
5d6a1fa6 | 247 | }; |
4052400f | 248 | |
5d6a1fa6 KS |
249 | return string_glob_strs[type]; |
250 | } | |
251 | ||
252 | static const char *token_str(enum token_type type) | |
253 | { | |
254 | static const char *token_strs[] = { | |
255 | [TK_UNSET] = "UNSET", | |
256 | [TK_RULE] = "RULE", | |
257 | ||
258 | [TK_M_ACTION] = "M ACTION", | |
259 | [TK_M_DEVPATH] = "M DEVPATH", | |
260 | [TK_M_KERNEL] = "M KERNEL", | |
261 | [TK_M_DEVLINK] = "M DEVLINK", | |
262 | [TK_M_NAME] = "M NAME", | |
263 | [TK_M_ENV] = "M ENV", | |
3f896a2a | 264 | [TK_M_TAG] = "M TAG", |
5d6a1fa6 KS |
265 | [TK_M_SUBSYSTEM] = "M SUBSYSTEM", |
266 | [TK_M_DRIVER] = "M DRIVER", | |
267 | [TK_M_WAITFOR] = "M WAITFOR", | |
268 | [TK_M_ATTR] = "M ATTR", | |
269 | ||
270 | [TK_M_PARENTS_MIN] = "M PARENTS_MIN", | |
271 | [TK_M_KERNELS] = "M KERNELS", | |
272 | [TK_M_SUBSYSTEMS] = "M SUBSYSTEMS", | |
273 | [TK_M_DRIVERS] = "M DRIVERS", | |
274 | [TK_M_ATTRS] = "M ATTRS", | |
7df0ed83 | 275 | [TK_M_TAGS] = "M TAGS", |
5d6a1fa6 KS |
276 | [TK_M_PARENTS_MAX] = "M PARENTS_MAX", |
277 | ||
278 | [TK_M_TEST] = "M TEST", | |
2181d30a | 279 | [TK_M_EVENT_TIMEOUT] = "M EVENT_TIMEOUT", |
5d6a1fa6 KS |
280 | [TK_M_PROGRAM] = "M PROGRAM", |
281 | [TK_M_IMPORT_FILE] = "M IMPORT_FILE", | |
282 | [TK_M_IMPORT_PROG] = "M IMPORT_PROG", | |
5539f624 | 283 | [TK_M_IMPORT_DB] = "M IMPORT_DB", |
c4f6dcc4 | 284 | [TK_M_IMPORT_CMDLINE] = "M IMPORT_CMDLINE", |
214a6c79 | 285 | [TK_M_IMPORT_PARENT] = "M IMPORT_PARENT", |
5d6a1fa6 KS |
286 | [TK_M_RESULT] = "M RESULT", |
287 | [TK_M_MAX] = "M MAX", | |
288 | ||
5d6a1fa6 KS |
289 | [TK_A_STRING_ESCAPE_NONE] = "A STRING_ESCAPE_NONE", |
290 | [TK_A_STRING_ESCAPE_REPLACE] = "A STRING_ESCAPE_REPLACE", | |
9ead6627 | 291 | [TK_A_DB_PERSIST] = "A DB_PERSIST", |
bd284db1 | 292 | [TK_A_INOTIFY_WATCH] = "A INOTIFY_WATCH", |
5d6a1fa6 KS |
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", | |
761dfddc | 299 | [TK_A_STATIC_NODE] = "A STATIC_NODE", |
5d6a1fa6 KS |
300 | [TK_A_MODE_ID] = "A MODE_ID", |
301 | [TK_A_ENV] = "A ENV", | |
28460195 | 302 | [TK_A_TAG] = "A ENV", |
5d6a1fa6 KS |
303 | [TK_A_NAME] = "A NAME", |
304 | [TK_A_DEVLINK] = "A DEVLINK", | |
5d6a1fa6 KS |
305 | [TK_A_ATTR] = "A ATTR", |
306 | [TK_A_RUN] = "A RUN", | |
307 | [TK_A_GOTO] = "A GOTO", | |
5d6a1fa6 KS |
308 | |
309 | [TK_END] = "END", | |
310 | }; | |
311 | ||
312 | return token_strs[type]; | |
313 | } | |
c7521974 | 314 | |
4052400f KS |
315 | static void dump_token(struct udev_rules *rules, struct token *token) |
316 | { | |
317 | enum token_type type = token->type; | |
318 | enum operation_type op = token->key.op; | |
319 | enum string_glob_type glob = token->key.glob; | |
320 | const char *value = &rules->buf[token->key.value_off]; | |
321 | const char *attr = &rules->buf[token->key.attr_off]; | |
154a7b84 | 322 | |
4052400f KS |
323 | switch (type) { |
324 | case TK_RULE: | |
325 | { | |
326 | const char *tks_ptr = (char *)rules->tokens; | |
327 | const char *tk_ptr = (char *)token; | |
5d6a1fa6 | 328 | unsigned int idx = (tk_ptr - tks_ptr) / sizeof(struct token); |
154a7b84 | 329 | |
d80f8ffd | 330 | dbg(rules->udev, "* RULE %s:%u, token: %u, count: %u, label: '%s'\n", |
4052400f | 331 | &rules->buf[token->rule.filename_off], token->rule.filename_line, |
5d6a1fa6 | 332 | idx, token->rule.token_count, |
d80f8ffd | 333 | &rules->buf[token->rule.label_off]); |
4052400f KS |
334 | break; |
335 | } | |
336 | case TK_M_ACTION: | |
337 | case TK_M_DEVPATH: | |
338 | case TK_M_KERNEL: | |
339 | case TK_M_SUBSYSTEM: | |
340 | case TK_M_DRIVER: | |
341 | case TK_M_WAITFOR: | |
342 | case TK_M_DEVLINK: | |
343 | case TK_M_NAME: | |
344 | case TK_M_KERNELS: | |
345 | case TK_M_SUBSYSTEMS: | |
346 | case TK_M_DRIVERS: | |
7df0ed83 | 347 | case TK_M_TAGS: |
4052400f KS |
348 | case TK_M_PROGRAM: |
349 | case TK_M_IMPORT_FILE: | |
350 | case TK_M_IMPORT_PROG: | |
5539f624 | 351 | case TK_M_IMPORT_DB: |
c4f6dcc4 | 352 | case TK_M_IMPORT_CMDLINE: |
4052400f KS |
353 | case TK_M_IMPORT_PARENT: |
354 | case TK_M_RESULT: | |
355 | case TK_A_NAME: | |
356 | case TK_A_DEVLINK: | |
357 | case TK_A_OWNER: | |
358 | case TK_A_GROUP: | |
359 | case TK_A_MODE: | |
360 | case TK_A_RUN: | |
361 | dbg(rules->udev, "%s %s '%s'(%s)\n", | |
5d6a1fa6 | 362 | token_str(type), operation_str(op), value, string_glob_str(glob)); |
4052400f KS |
363 | break; |
364 | case TK_M_ATTR: | |
365 | case TK_M_ATTRS: | |
366 | case TK_M_ENV: | |
367 | case TK_A_ATTR: | |
368 | case TK_A_ENV: | |
369 | dbg(rules->udev, "%s %s '%s' '%s'(%s)\n", | |
5d6a1fa6 | 370 | token_str(type), operation_str(op), attr, value, string_glob_str(glob)); |
4052400f | 371 | break; |
3f896a2a | 372 | case TK_M_TAG: |
28460195 KS |
373 | case TK_A_TAG: |
374 | dbg(rules->udev, "%s %s '%s'\n", token_str(type), operation_str(op), value); | |
375 | break; | |
4052400f KS |
376 | case TK_A_STRING_ESCAPE_NONE: |
377 | case TK_A_STRING_ESCAPE_REPLACE: | |
9ead6627 | 378 | case TK_A_DB_PERSIST: |
5d69a34c KS |
379 | dbg(rules->udev, "%s\n", token_str(type)); |
380 | break; | |
4052400f KS |
381 | case TK_M_TEST: |
382 | dbg(rules->udev, "%s %s '%s'(%s) %#o\n", | |
5d6a1fa6 | 383 | token_str(type), operation_str(op), value, string_glob_str(glob), token->key.mode); |
4052400f | 384 | break; |
46f194cb | 385 | case TK_A_INOTIFY_WATCH: |
2236ddae | 386 | dbg(rules->udev, "%s %u\n", token_str(type), token->key.watch); |
46f194cb | 387 | break; |
4052400f | 388 | case TK_A_DEVLINK_PRIO: |
761dfddc | 389 | dbg(rules->udev, "%s %u\n", token_str(type), token->key.devlink_prio); |
4052400f KS |
390 | break; |
391 | case TK_A_OWNER_ID: | |
5d6a1fa6 | 392 | dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.uid); |
4052400f KS |
393 | break; |
394 | case TK_A_GROUP_ID: | |
5d6a1fa6 | 395 | dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.gid); |
4052400f KS |
396 | break; |
397 | case TK_A_MODE_ID: | |
5d6a1fa6 | 398 | dbg(rules->udev, "%s %s %#o\n", token_str(type), operation_str(op), token->key.mode); |
4052400f | 399 | break; |
761dfddc KS |
400 | case TK_A_STATIC_NODE: |
401 | dbg(rules->udev, "%s '%s'\n", token_str(type), value); | |
402 | break; | |
2181d30a | 403 | case TK_M_EVENT_TIMEOUT: |
761dfddc | 404 | dbg(rules->udev, "%s %u\n", token_str(type), token->key.event_timeout); |
4052400f KS |
405 | break; |
406 | case TK_A_GOTO: | |
5d6a1fa6 | 407 | dbg(rules->udev, "%s '%s' %u\n", token_str(type), value, token->key.rule_goto); |
4052400f KS |
408 | break; |
409 | case TK_END: | |
5d6a1fa6 | 410 | dbg(rules->udev, "* %s\n", token_str(type)); |
4052400f KS |
411 | break; |
412 | case TK_M_PARENTS_MIN: | |
413 | case TK_M_PARENTS_MAX: | |
414 | case TK_M_MAX: | |
415 | case TK_UNSET: | |
416 | dbg(rules->udev, "unknown type %u\n", type); | |
417 | break; | |
418 | } | |
419 | } | |
154a7b84 | 420 | |
4052400f KS |
421 | static void dump_rules(struct udev_rules *rules) |
422 | { | |
423 | unsigned int i; | |
154a7b84 | 424 | |
4052400f KS |
425 | dbg(rules->udev, "dumping %u (%zu bytes) tokens, %u (%zu bytes) strings\n", |
426 | rules->token_cur, | |
427 | rules->token_cur * sizeof(struct token), | |
428 | rules->buf_count, | |
429 | rules->buf_cur); | |
430 | for(i = 0; i < rules->token_cur; i++) | |
431 | dump_token(rules, &rules->tokens[i]); | |
432 | } | |
433 | #else | |
5d6a1fa6 KS |
434 | static inline const char *operation_str(enum operation_type type) { return NULL; } |
435 | static inline const char *token_str(enum token_type type) { return NULL; } | |
4052400f KS |
436 | static inline void dump_token(struct udev_rules *rules, struct token *token) {} |
437 | static inline void dump_rules(struct udev_rules *rules) {} | |
045a3bc8 | 438 | #endif /* ENABLE_DEBUG */ |
c7521974 | 439 | |
1449a55d | 440 | static int add_new_string(struct udev_rules *rules, const char *str, size_t bytes) |
c7521974 | 441 | { |
6880b25d | 442 | int off; |
c7521974 | 443 | |
34d6a259 | 444 | /* grow buffer if needed */ |
1449a55d | 445 | if (rules->buf_cur + bytes+1 >= rules->buf_max) { |
6880b25d KS |
446 | char *buf; |
447 | unsigned int add; | |
c7521974 | 448 | |
6880b25d KS |
449 | /* double the buffer size */ |
450 | add = rules->buf_max; | |
1449a55d AJ |
451 | if (add < bytes * 8) |
452 | add = bytes * 8; | |
c7521974 | 453 | |
6880b25d KS |
454 | buf = realloc(rules->buf, rules->buf_max + add); |
455 | if (buf == NULL) | |
456 | return -1; | |
86b57788 | 457 | dbg(rules->udev, "extend buffer from %zu to %zu\n", rules->buf_max, rules->buf_max + add); |
6880b25d KS |
458 | rules->buf = buf; |
459 | rules->buf_max += add; | |
c7521974 | 460 | } |
6880b25d | 461 | off = rules->buf_cur; |
1449a55d AJ |
462 | memcpy(&rules->buf[rules->buf_cur], str, bytes); |
463 | rules->buf_cur += bytes; | |
6880b25d KS |
464 | rules->buf_count++; |
465 | return off; | |
c7521974 KS |
466 | } |
467 | ||
1449a55d | 468 | static int add_string(struct udev_rules *rules, const char *str) |
c7521974 | 469 | { |
bcf44d55 KS |
470 | unsigned int node_idx; |
471 | struct trie_node *new_node; | |
472 | unsigned int new_node_idx; | |
1449a55d | 473 | unsigned char key; |
bcf44d55 | 474 | unsigned short len; |
1c8af93a | 475 | unsigned int depth; |
1449a55d | 476 | unsigned int off; |
023ed7b0 | 477 | struct trie_node *parent; |
1449a55d | 478 | |
023ed7b0 | 479 | /* walk trie, start from last character of str to find matching tails */ |
949075db | 480 | len = strlen(str); |
023ed7b0 | 481 | key = str[len-1]; |
949075db | 482 | node_idx = 0; |
023ed7b0 KS |
483 | for (depth = 0; depth <= len; depth++) { |
484 | struct trie_node *node; | |
485 | unsigned int child_idx; | |
486 | ||
487 | node = &rules->trie_nodes[node_idx]; | |
488 | off = node->value_off + node->value_len - len; | |
489 | ||
490 | /* match against current node */ | |
491 | if (depth == len || (node->value_len >= len && memcmp(&rules->buf[off], str, len) == 0)) | |
492 | return off; | |
493 | ||
494 | /* lookup child node */ | |
495 | key = str[len - 1 - depth]; | |
496 | child_idx = node->child_idx; | |
497 | while (child_idx > 0) { | |
498 | struct trie_node *child; | |
499 | ||
500 | child = &rules->trie_nodes[child_idx]; | |
501 | if (child->key == key) | |
1449a55d | 502 | break; |
023ed7b0 | 503 | child_idx = child->next_child_idx; |
1449a55d | 504 | } |
023ed7b0 KS |
505 | if (child_idx == 0) |
506 | break; | |
507 | node_idx = child_idx; | |
1449a55d AJ |
508 | } |
509 | ||
510 | /* string not found, add it */ | |
511 | off = add_new_string(rules, str, len + 1); | |
512 | ||
bcf44d55 KS |
513 | /* grow trie nodes if needed */ |
514 | if (rules->trie_nodes_cur >= rules->trie_nodes_max) { | |
515 | struct trie_node *nodes; | |
516 | unsigned int add; | |
1449a55d AJ |
517 | |
518 | /* double the buffer size */ | |
bcf44d55 | 519 | add = rules->trie_nodes_max; |
1449a55d AJ |
520 | if (add < 8) |
521 | add = 8; | |
522 | ||
bcf44d55 KS |
523 | nodes = realloc(rules->trie_nodes, (rules->trie_nodes_max + add) * sizeof(struct trie_node)); |
524 | if (nodes == NULL) | |
1449a55d | 525 | return -1; |
bcf44d55 KS |
526 | dbg(rules->udev, "extend trie nodes from %u to %u\n", |
527 | rules->trie_nodes_max, rules->trie_nodes_max + add); | |
528 | rules->trie_nodes = nodes; | |
529 | rules->trie_nodes_max += add; | |
1449a55d AJ |
530 | } |
531 | ||
023ed7b0 | 532 | /* get a new node */ |
bcf44d55 KS |
533 | new_node_idx = rules->trie_nodes_cur; |
534 | rules->trie_nodes_cur++; | |
535 | new_node = &rules->trie_nodes[new_node_idx]; | |
023ed7b0 | 536 | memset(new_node, 0x00, sizeof(struct trie_node)); |
bcf44d55 KS |
537 | new_node->value_off = off; |
538 | new_node->value_len = len; | |
023ed7b0 | 539 | new_node->key = key; |
bcf44d55 | 540 | |
023ed7b0 KS |
541 | /* join the parent's child list */ |
542 | parent = &rules->trie_nodes[node_idx]; | |
543 | if (parent->child_idx == 0) { | |
544 | parent->child_idx = new_node_idx; | |
bcf44d55 | 545 | } else { |
023ed7b0 | 546 | struct trie_node *last_child; |
1449a55d | 547 | |
023ed7b0 KS |
548 | last_child = &rules->trie_nodes[parent->last_child_idx]; |
549 | last_child->next_child_idx = new_node_idx; | |
bcf44d55 | 550 | } |
023ed7b0 | 551 | parent->last_child_idx = new_node_idx; |
1449a55d AJ |
552 | return off; |
553 | } | |
554 | ||
555 | static int add_token(struct udev_rules *rules, struct token *token) | |
556 | { | |
34d6a259 | 557 | /* grow buffer if needed */ |
6880b25d KS |
558 | if (rules->token_cur+1 >= rules->token_max) { |
559 | struct token *tokens; | |
560 | unsigned int add; | |
c7521974 | 561 | |
6880b25d KS |
562 | /* double the buffer size */ |
563 | add = rules->token_max; | |
154a7b84 KS |
564 | if (add < 8) |
565 | add = 8; | |
c7521974 | 566 | |
6880b25d KS |
567 | tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token)); |
568 | if (tokens == NULL) | |
569 | return -1; | |
86b57788 | 570 | dbg(rules->udev, "extend tokens from %u to %u\n", rules->token_max, rules->token_max + add); |
6880b25d KS |
571 | rules->tokens = tokens; |
572 | rules->token_max += add; | |
c7521974 | 573 | } |
6880b25d KS |
574 | memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token)); |
575 | rules->token_cur++; | |
576 | return 0; | |
c7521974 | 577 | } |
a27cd06c | 578 | |
154a7b84 KS |
579 | static uid_t add_uid(struct udev_rules *rules, const char *owner) |
580 | { | |
581 | unsigned int i; | |
582 | uid_t uid; | |
583 | unsigned int off; | |
584 | ||
585 | /* lookup, if we know it already */ | |
586 | for (i = 0; i < rules->uids_cur; i++) { | |
587 | off = rules->uids[i].name_off; | |
588 | if (strcmp(&rules->buf[off], owner) == 0) { | |
589 | uid = rules->uids[i].uid; | |
590 | dbg(rules->udev, "return existing %u for '%s'\n", uid, owner); | |
591 | return uid; | |
592 | } | |
593 | } | |
594 | uid = util_lookup_user(rules->udev, owner); | |
595 | ||
596 | /* grow buffer if needed */ | |
597 | if (rules->uids_cur+1 >= rules->uids_max) { | |
598 | struct uid_gid *uids; | |
599 | unsigned int add; | |
600 | ||
601 | /* double the buffer size */ | |
602 | add = rules->uids_max; | |
603 | if (add < 1) | |
604 | add = 8; | |
605 | ||
606 | uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid)); | |
607 | if (uids == NULL) | |
608 | return uid; | |
86b57788 | 609 | dbg(rules->udev, "extend uids from %u to %u\n", rules->uids_max, rules->uids_max + add); |
154a7b84 KS |
610 | rules->uids = uids; |
611 | rules->uids_max += add; | |
612 | } | |
613 | rules->uids[rules->uids_cur].uid = uid; | |
614 | off = add_string(rules, owner); | |
615 | if (off <= 0) | |
616 | return uid; | |
617 | rules->uids[rules->uids_cur].name_off = off; | |
618 | rules->uids_cur++; | |
619 | return uid; | |
620 | } | |
621 | ||
622 | static gid_t add_gid(struct udev_rules *rules, const char *group) | |
623 | { | |
624 | unsigned int i; | |
625 | gid_t gid; | |
626 | unsigned int off; | |
627 | ||
628 | /* lookup, if we know it already */ | |
629 | for (i = 0; i < rules->gids_cur; i++) { | |
630 | off = rules->gids[i].name_off; | |
631 | if (strcmp(&rules->buf[off], group) == 0) { | |
632 | gid = rules->gids[i].gid; | |
ac218d9c | 633 | dbg(rules->udev, "return existing %u for '%s'\n", gid, group); |
154a7b84 KS |
634 | return gid; |
635 | } | |
636 | } | |
637 | gid = util_lookup_group(rules->udev, group); | |
638 | ||
639 | /* grow buffer if needed */ | |
640 | if (rules->gids_cur+1 >= rules->gids_max) { | |
641 | struct uid_gid *gids; | |
642 | unsigned int add; | |
643 | ||
644 | /* double the buffer size */ | |
645 | add = rules->gids_max; | |
646 | if (add < 1) | |
647 | add = 8; | |
648 | ||
649 | gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid)); | |
650 | if (gids == NULL) | |
651 | return gid; | |
86b57788 | 652 | dbg(rules->udev, "extend gids from %u to %u\n", rules->gids_max, rules->gids_max + add); |
154a7b84 KS |
653 | rules->gids = gids; |
654 | rules->gids_max += add; | |
655 | } | |
656 | rules->gids[rules->gids_cur].gid = gid; | |
657 | off = add_string(rules, group); | |
658 | if (off <= 0) | |
659 | return gid; | |
660 | rules->gids[rules->gids_cur].name_off = off; | |
661 | rules->gids_cur++; | |
662 | return gid; | |
663 | } | |
664 | ||
bb144ed1 | 665 | static int import_property_from_string(struct udev_device *dev, char *line) |
bd0ed2ff | 666 | { |
bb144ed1 KS |
667 | struct udev *udev = udev_device_get_udev(dev); |
668 | char *key; | |
669 | char *val; | |
670 | size_t len; | |
bd0ed2ff | 671 | |
bb144ed1 KS |
672 | /* find key */ |
673 | key = line; | |
674 | while (isspace(key[0])) | |
675 | key++; | |
bd0ed2ff | 676 | |
bb144ed1 KS |
677 | /* comment or empty line */ |
678 | if (key[0] == '#' || key[0] == '\0') | |
679 | return -1; | |
16511863 | 680 | |
bb144ed1 KS |
681 | /* split key/value */ |
682 | val = strchr(key, '='); | |
683 | if (val == NULL) | |
684 | return -1; | |
685 | val[0] = '\0'; | |
686 | val++; | |
aa8734ff | 687 | |
bb144ed1 KS |
688 | /* find value */ |
689 | while (isspace(val[0])) | |
690 | val++; | |
691 | ||
692 | /* terminate key */ | |
693 | len = strlen(key); | |
694 | if (len == 0) | |
695 | return -1; | |
696 | while (isspace(key[len-1])) | |
697 | len--; | |
698 | key[len] = '\0'; | |
699 | ||
700 | /* terminate value */ | |
701 | len = strlen(val); | |
702 | if (len == 0) | |
703 | return -1; | |
704 | while (isspace(val[len-1])) | |
705 | len--; | |
706 | val[len] = '\0'; | |
707 | ||
708 | if (len == 0) | |
709 | return -1; | |
710 | ||
711 | /* unquote */ | |
712 | if (val[0] == '"' || val[0] == '\'') { | |
713 | if (val[len-1] != val[0]) { | |
714 | info(udev, "inconsistent quoting: '%s', skip\n", line); | |
715 | return -1; | |
bd0ed2ff | 716 | } |
bb144ed1 KS |
717 | val[len-1] = '\0'; |
718 | val++; | |
719 | } | |
720 | ||
86b57788 | 721 | dbg(udev, "adding '%s'='%s'\n", key, val); |
bb144ed1 KS |
722 | |
723 | /* handle device, renamed by external tool, returning new path */ | |
724 | if (strcmp(key, "DEVPATH") == 0) { | |
725 | char syspath[UTIL_PATH_SIZE]; | |
726 | ||
727 | info(udev, "updating devpath from '%s' to '%s'\n", | |
728 | udev_device_get_devpath(dev), val); | |
065db052 | 729 | util_strscpyl(syspath, sizeof(syspath), udev_get_sys_path(udev), val, NULL); |
bb144ed1 KS |
730 | udev_device_set_syspath(dev, syspath); |
731 | } else { | |
732 | struct udev_list_entry *entry; | |
733 | ||
734 | entry = udev_device_add_property(dev, key, val); | |
b25a9454 KS |
735 | /* store in db, skip private keys */ |
736 | if (key[0] != '.') | |
8958da13 | 737 | udev_list_entry_set_num(entry, true); |
bd0ed2ff | 738 | } |
be4bedd1 KS |
739 | return 0; |
740 | } | |
741 | ||
6880b25d | 742 | static int import_file_into_properties(struct udev_device *dev, const char *filename) |
be4bedd1 | 743 | { |
bb144ed1 KS |
744 | FILE *f; |
745 | char line[UTIL_LINE_SIZE]; | |
be4bedd1 | 746 | |
bb144ed1 KS |
747 | f = fopen(filename, "r"); |
748 | if (f == NULL) | |
be4bedd1 | 749 | return -1; |
fc42bd5d | 750 | while (fgets(line, sizeof(line), f) != NULL) |
bb144ed1 KS |
751 | import_property_from_string(dev, line); |
752 | fclose(f); | |
be4bedd1 | 753 | return 0; |
bd0ed2ff KS |
754 | } |
755 | ||
2181d30a | 756 | static int import_program_into_properties(struct udev_event *event, const char *program, const sigset_t *sigmask) |
319c6700 | 757 | { |
2181d30a | 758 | struct udev_device *dev = event->dev; |
d0db192f | 759 | char **envp; |
851dd4dd | 760 | char result[UTIL_LINE_SIZE]; |
bb144ed1 | 761 | char *line; |
2181d30a | 762 | int err; |
319c6700 | 763 | |
d0db192f | 764 | envp = udev_device_get_properties_envp(dev); |
2181d30a KS |
765 | err = udev_event_spawn(event, program, envp, sigmask, result, sizeof(result)); |
766 | if (err < 0) | |
767 | return err; | |
bb144ed1 KS |
768 | |
769 | line = result; | |
770 | while (line != NULL) { | |
771 | char *pos; | |
772 | ||
773 | pos = strchr(line, '\n'); | |
774 | if (pos != NULL) { | |
775 | pos[0] = '\0'; | |
776 | pos = &pos[1]; | |
777 | } | |
778 | import_property_from_string(dev, line); | |
779 | line = pos; | |
780 | } | |
781 | return 0; | |
319c6700 KS |
782 | } |
783 | ||
6880b25d | 784 | static int import_parent_into_properties(struct udev_device *dev, const char *filter) |
0bfb84e1 | 785 | { |
bb144ed1 | 786 | struct udev *udev = udev_device_get_udev(dev); |
aa8734ff KS |
787 | struct udev_device *dev_parent; |
788 | struct udev_list_entry *list_entry; | |
0bfb84e1 | 789 | |
bb144ed1 | 790 | dev_parent = udev_device_get_parent(dev); |
aa8734ff KS |
791 | if (dev_parent == NULL) |
792 | return -1; | |
0bfb84e1 | 793 | |
bb144ed1 | 794 | dbg(udev, "found parent '%s', get the node name\n", udev_device_get_syspath(dev_parent)); |
aa8734ff KS |
795 | udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) { |
796 | const char *key = udev_list_entry_get_name(list_entry); | |
797 | const char *val = udev_list_entry_get_value(list_entry); | |
0bfb84e1 | 798 | |
aa8734ff KS |
799 | if (fnmatch(filter, key, 0) == 0) { |
800 | struct udev_list_entry *entry; | |
e2ecb34f | 801 | |
bb144ed1 KS |
802 | dbg(udev, "import key '%s=%s'\n", key, val); |
803 | entry = udev_device_add_property(dev, key, val); | |
b25a9454 KS |
804 | /* store in db, skip private keys */ |
805 | if (key[0] != '.') | |
8958da13 | 806 | udev_list_entry_set_num(entry, true); |
aa8734ff | 807 | } |
e2ecb34f | 808 | } |
aa8734ff | 809 | return 0; |
e2ecb34f KS |
810 | } |
811 | ||
c86be870 | 812 | #define WAIT_LOOP_PER_SECOND 50 |
6880b25d | 813 | static int wait_for_file(struct udev_device *dev, const char *file, int timeout) |
b2fe4b9a | 814 | { |
6880b25d | 815 | struct udev *udev = udev_device_get_udev(dev); |
17fcfb59 | 816 | char filepath[UTIL_PATH_SIZE]; |
1822e9b0 | 817 | char devicepath[UTIL_PATH_SIZE]; |
b2fe4b9a KS |
818 | struct stat stats; |
819 | int loop = timeout * WAIT_LOOP_PER_SECOND; | |
820 | ||
ea97dc37 | 821 | /* a relative path is a device attribute */ |
1822e9b0 | 822 | devicepath[0] = '\0'; |
ea97dc37 | 823 | if (file[0] != '/') { |
065db052 KS |
824 | util_strscpyl(devicepath, sizeof(devicepath), |
825 | udev_get_sys_path(udev), udev_device_get_devpath(dev), NULL); | |
826 | util_strscpyl(filepath, sizeof(filepath), devicepath, "/", file, NULL); | |
ea97dc37 KS |
827 | file = filepath; |
828 | } | |
829 | ||
6880b25d | 830 | dbg(udev, "will wait %i sec for '%s'\n", timeout, file); |
b2fe4b9a | 831 | while (--loop) { |
959e8b5d DM |
832 | const struct timespec duration = { 0, 1000 * 1000 * 1000 / WAIT_LOOP_PER_SECOND }; |
833 | ||
656ba91e | 834 | /* lookup file */ |
ea97dc37 | 835 | if (stat(file, &stats) == 0) { |
6880b25d | 836 | info(udev, "file '%s' appeared after %i loops\n", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1); |
b2fe4b9a KS |
837 | return 0; |
838 | } | |
eb5b8640 | 839 | /* make sure, the device did not disappear in the meantime */ |
ea97dc37 | 840 | if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) { |
6880b25d | 841 | info(udev, "device disappeared while waiting for '%s'\n", file); |
656ba91e KS |
842 | return -2; |
843 | } | |
6880b25d | 844 | info(udev, "wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND); |
959e8b5d | 845 | nanosleep(&duration, NULL); |
b2fe4b9a | 846 | } |
6880b25d | 847 | info(udev, "waiting for '%s' failed\n", file); |
b2fe4b9a KS |
848 | return -1; |
849 | } | |
850 | ||
0ea5e96e KS |
851 | static int attr_subst_subdir(char *attr, size_t len) |
852 | { | |
761dfddc | 853 | bool found = false; |
0ea5e96e | 854 | |
065db052 KS |
855 | if (strstr(attr, "/*/")) { |
856 | char *pos; | |
857 | char dirname[UTIL_PATH_SIZE]; | |
858 | const char *tail; | |
0ea5e96e KS |
859 | DIR *dir; |
860 | ||
065db052 KS |
861 | util_strscpy(dirname, sizeof(dirname), attr); |
862 | pos = strstr(dirname, "/*/"); | |
863 | if (pos == NULL) | |
864 | return -1; | |
865 | pos[0] = '\0'; | |
866 | tail = &pos[2]; | |
867 | dir = opendir(dirname); | |
0ea5e96e KS |
868 | if (dir != NULL) { |
869 | struct dirent *dent; | |
870 | ||
871 | for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) { | |
872 | struct stat stats; | |
873 | ||
874 | if (dent->d_name[0] == '.') | |
875 | continue; | |
065db052 | 876 | util_strscpyl(attr, len, dirname, "/", dent->d_name, tail, NULL); |
0ea5e96e | 877 | if (stat(attr, &stats) == 0) { |
761dfddc | 878 | found = true; |
0ea5e96e KS |
879 | break; |
880 | } | |
0ea5e96e KS |
881 | } |
882 | closedir(dir); | |
883 | } | |
0ea5e96e KS |
884 | } |
885 | ||
886 | return found; | |
887 | } | |
888 | ||
b0f7409f | 889 | static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value) |
a0e5382d | 890 | { |
6880b25d KS |
891 | char *linepos; |
892 | char *temp; | |
a0e5382d | 893 | |
6880b25d | 894 | linepos = *line; |
9257ecfc | 895 | if (linepos == NULL || linepos[0] == '\0') |
6880b25d | 896 | return -1; |
a0e5382d | 897 | |
6880b25d KS |
898 | /* skip whitespace */ |
899 | while (isspace(linepos[0]) || linepos[0] == ',') | |
900 | linepos++; | |
aa8734ff | 901 | |
6880b25d KS |
902 | /* get the key */ |
903 | if (linepos[0] == '\0') | |
904 | return -1; | |
905 | *key = linepos; | |
81313e1b | 906 | |
88cbfb09 | 907 | for (;;) { |
6880b25d KS |
908 | linepos++; |
909 | if (linepos[0] == '\0') | |
910 | return -1; | |
911 | if (isspace(linepos[0])) | |
81313e1b | 912 | break; |
6880b25d KS |
913 | if (linepos[0] == '=') |
914 | break; | |
915 | if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':')) | |
916 | if (linepos[1] == '=') | |
1ff1aa42 | 917 | break; |
953249a3 KS |
918 | } |
919 | ||
6880b25d KS |
920 | /* remember end of key */ |
921 | temp = linepos; | |
b2fe4b9a | 922 | |
6880b25d KS |
923 | /* skip whitespace after key */ |
924 | while (isspace(linepos[0])) | |
925 | linepos++; | |
926 | if (linepos[0] == '\0') | |
927 | return -1; | |
b2fe4b9a | 928 | |
6880b25d KS |
929 | /* get operation type */ |
930 | if (linepos[0] == '=' && linepos[1] == '=') { | |
b0f7409f | 931 | *op = OP_MATCH; |
6880b25d KS |
932 | linepos += 2; |
933 | } else if (linepos[0] == '!' && linepos[1] == '=') { | |
b0f7409f | 934 | *op = OP_NOMATCH; |
6880b25d KS |
935 | linepos += 2; |
936 | } else if (linepos[0] == '+' && linepos[1] == '=') { | |
b0f7409f | 937 | *op = OP_ADD; |
6880b25d KS |
938 | linepos += 2; |
939 | } else if (linepos[0] == '=') { | |
b0f7409f | 940 | *op = OP_ASSIGN; |
6880b25d KS |
941 | linepos++; |
942 | } else if (linepos[0] == ':' && linepos[1] == '=') { | |
b0f7409f | 943 | *op = OP_ASSIGN_FINAL; |
6880b25d KS |
944 | linepos += 2; |
945 | } else | |
946 | return -1; | |
d0c8cb7d | 947 | |
6880b25d KS |
948 | /* terminate key */ |
949 | temp[0] = '\0'; | |
95776dc6 | 950 | |
6880b25d KS |
951 | /* skip whitespace after operator */ |
952 | while (isspace(linepos[0])) | |
953 | linepos++; | |
954 | if (linepos[0] == '\0') | |
955 | return -1; | |
aa8734ff | 956 | |
ac218d9c | 957 | /* get the value */ |
6880b25d KS |
958 | if (linepos[0] == '"') |
959 | linepos++; | |
960 | else | |
961 | return -1; | |
962 | *value = linepos; | |
aa8734ff | 963 | |
ac218d9c | 964 | /* terminate */ |
6880b25d KS |
965 | temp = strchr(linepos, '"'); |
966 | if (!temp) | |
967 | return -1; | |
968 | temp[0] = '\0'; | |
969 | temp++; | |
5d6a1fa6 | 970 | dbg(udev, "%s '%s'-'%s'\n", operation_str(*op), *key, *value); |
aa8734ff | 971 | |
6880b25d KS |
972 | /* move line to next key */ |
973 | *line = temp; | |
974 | return 0; | |
975 | } | |
95776dc6 | 976 | |
6880b25d KS |
977 | /* extract possible KEY{attr} */ |
978 | static char *get_key_attribute(struct udev *udev, char *str) | |
979 | { | |
980 | char *pos; | |
981 | char *attr; | |
95776dc6 | 982 | |
6880b25d KS |
983 | attr = strchr(str, '{'); |
984 | if (attr != NULL) { | |
985 | attr++; | |
986 | pos = strchr(attr, '}'); | |
987 | if (pos == NULL) { | |
988 | err(udev, "missing closing brace for format\n"); | |
989 | return NULL; | |
95776dc6 | 990 | } |
6880b25d KS |
991 | pos[0] = '\0'; |
992 | dbg(udev, "attribute='%s'\n", attr); | |
993 | return attr; | |
95776dc6 | 994 | } |
6880b25d KS |
995 | return NULL; |
996 | } | |
95776dc6 | 997 | |
0ef254d5 KS |
998 | static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type, |
999 | enum operation_type op, | |
1000 | const char *value, const void *data) | |
6880b25d KS |
1001 | { |
1002 | struct token *token = &rule_tmp->token[rule_tmp->token_cur]; | |
32028733 | 1003 | const char *attr = NULL; |
ac218d9c KS |
1004 | |
1005 | memset(token, 0x00, sizeof(struct token)); | |
6880b25d KS |
1006 | |
1007 | switch (type) { | |
6880b25d KS |
1008 | case TK_M_ACTION: |
1009 | case TK_M_DEVPATH: | |
1010 | case TK_M_KERNEL: | |
1011 | case TK_M_SUBSYSTEM: | |
1012 | case TK_M_DRIVER: | |
7aeeaedc | 1013 | case TK_M_WAITFOR: |
6880b25d KS |
1014 | case TK_M_DEVLINK: |
1015 | case TK_M_NAME: | |
1016 | case TK_M_KERNELS: | |
1017 | case TK_M_SUBSYSTEMS: | |
1018 | case TK_M_DRIVERS: | |
7df0ed83 | 1019 | case TK_M_TAGS: |
6880b25d KS |
1020 | case TK_M_PROGRAM: |
1021 | case TK_M_IMPORT_FILE: | |
1022 | case TK_M_IMPORT_PROG: | |
5539f624 | 1023 | case TK_M_IMPORT_DB: |
c4f6dcc4 | 1024 | case TK_M_IMPORT_CMDLINE: |
6880b25d KS |
1025 | case TK_M_IMPORT_PARENT: |
1026 | case TK_M_RESULT: | |
1027 | case TK_A_OWNER: | |
1028 | case TK_A_GROUP: | |
1029 | case TK_A_MODE: | |
1030 | case TK_A_NAME: | |
6880b25d | 1031 | case TK_A_GOTO: |
3f896a2a | 1032 | case TK_M_TAG: |
28460195 | 1033 | case TK_A_TAG: |
6880b25d | 1034 | token->key.value_off = add_string(rule_tmp->rules, value); |
e57e7bc1 | 1035 | break; |
6880b25d KS |
1036 | case TK_M_ENV: |
1037 | case TK_M_ATTR: | |
1038 | case TK_M_ATTRS: | |
1039 | case TK_A_ATTR: | |
1040 | case TK_A_ENV: | |
32028733 | 1041 | attr = data; |
6880b25d KS |
1042 | token->key.value_off = add_string(rule_tmp->rules, value); |
1043 | token->key.attr_off = add_string(rule_tmp->rules, attr); | |
1044 | break; | |
6c29f2b9 KS |
1045 | case TK_A_DEVLINK: |
1046 | token->key.value_off = add_string(rule_tmp->rules, value); | |
1047 | token->key.devlink_unique = *(int *)data; | |
1048 | break; | |
6880b25d | 1049 | case TK_M_TEST: |
6880b25d | 1050 | token->key.value_off = add_string(rule_tmp->rules, value); |
ac218d9c KS |
1051 | if (data != NULL) |
1052 | token->key.mode = *(mode_t *)data; | |
6880b25d | 1053 | break; |
6880b25d KS |
1054 | case TK_A_STRING_ESCAPE_NONE: |
1055 | case TK_A_STRING_ESCAPE_REPLACE: | |
9ead6627 | 1056 | case TK_A_DB_PERSIST: |
5d69a34c | 1057 | break; |
6880b25d KS |
1058 | case TK_A_RUN: |
1059 | token->key.value_off = add_string(rule_tmp->rules, value); | |
6c29f2b9 | 1060 | token->key.fail_on_error = *(int *)data; |
6880b25d | 1061 | break; |
46f194cb | 1062 | case TK_A_INOTIFY_WATCH: |
6880b25d KS |
1063 | case TK_A_DEVLINK_PRIO: |
1064 | token->key.devlink_prio = *(int *)data; | |
1065 | break; | |
1066 | case TK_A_OWNER_ID: | |
1067 | token->key.uid = *(uid_t *)data; | |
1068 | break; | |
1069 | case TK_A_GROUP_ID: | |
1070 | token->key.gid = *(gid_t *)data; | |
1071 | break; | |
1072 | case TK_A_MODE_ID: | |
1073 | token->key.mode = *(mode_t *)data; | |
1074 | break; | |
761dfddc KS |
1075 | case TK_A_STATIC_NODE: |
1076 | token->key.value_off = add_string(rule_tmp->rules, value); | |
1077 | break; | |
2181d30a | 1078 | case TK_M_EVENT_TIMEOUT: |
6880b25d KS |
1079 | token->key.event_timeout = *(int *)data; |
1080 | break; | |
1081 | case TK_RULE: | |
d15fcce4 | 1082 | case TK_M_PARENTS_MIN: |
b0f7409f | 1083 | case TK_M_PARENTS_MAX: |
ac218d9c | 1084 | case TK_M_MAX: |
6880b25d | 1085 | case TK_END: |
ac218d9c | 1086 | case TK_UNSET: |
6880b25d KS |
1087 | err(rule_tmp->rules->udev, "wrong type %u\n", type); |
1088 | return -1; | |
724257d9 | 1089 | } |
ac218d9c | 1090 | |
fb045134 KS |
1091 | if (value != NULL && type < TK_M_MAX) { |
1092 | /* check if we need to split or call fnmatch() while matching rules */ | |
32028733 | 1093 | enum string_glob_type glob; |
fb045134 KS |
1094 | int has_split; |
1095 | int has_glob; | |
1096 | ||
1097 | has_split = (strchr(value, '|') != NULL); | |
32028733 | 1098 | has_glob = (strchr(value, '*') != NULL || strchr(value, '?') != NULL || strchr(value, '[') != NULL); |
fb045134 KS |
1099 | if (has_split && has_glob) { |
1100 | glob = GL_SPLIT_GLOB; | |
1101 | } else if (has_split) { | |
1102 | glob = GL_SPLIT; | |
1103 | } else if (has_glob) { | |
1104 | if (strcmp(value, "?*") == 0) | |
1105 | glob = GL_SOMETHING; | |
1106 | else | |
1107 | glob = GL_GLOB; | |
32028733 KS |
1108 | } else { |
1109 | glob = GL_PLAIN; | |
ac218d9c | 1110 | } |
32028733 KS |
1111 | token->key.glob = glob; |
1112 | } | |
1113 | ||
1114 | if (value != NULL && type > TK_M_MAX) { | |
1115 | /* check if assigned value has substitution chars */ | |
1116 | if (value[0] == '[') | |
1117 | token->key.subst = SB_SUBSYS; | |
1118 | else if (strchr(value, '%') != NULL || strchr(value, '$') != NULL) | |
1119 | token->key.subst = SB_FORMAT; | |
1120 | else | |
1121 | token->key.subst = SB_NONE; | |
1122 | } | |
1123 | ||
1124 | if (attr != NULL) { | |
1125 | /* check if property/attribut name has substitution chars */ | |
1126 | if (attr[0] == '[') | |
1127 | token->key.attrsubst = SB_SUBSYS; | |
1128 | else if (strchr(attr, '%') != NULL || strchr(attr, '$') != NULL) | |
1129 | token->key.attrsubst = SB_FORMAT; | |
1130 | else | |
1131 | token->key.attrsubst = SB_NONE; | |
ac218d9c KS |
1132 | } |
1133 | ||
0ef254d5 | 1134 | token->key.type = type; |
6880b25d KS |
1135 | token->key.op = op; |
1136 | rule_tmp->token_cur++; | |
1137 | if (rule_tmp->token_cur >= ARRAY_SIZE(rule_tmp->token)) { | |
1138 | err(rule_tmp->rules->udev, "temporary rule array too small\n"); | |
1139 | return -1; | |
e57e7bc1 | 1140 | } |
6880b25d KS |
1141 | return 0; |
1142 | } | |
e57e7bc1 | 1143 | |
6880b25d KS |
1144 | static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp) |
1145 | { | |
1146 | unsigned int i; | |
1147 | unsigned int start = 0; | |
1148 | unsigned int end = rule_tmp->token_cur; | |
1149 | ||
1150 | for (i = 0; i < rule_tmp->token_cur; i++) { | |
ac218d9c | 1151 | enum token_type next_val = TK_UNSET; |
78715f65 | 1152 | unsigned int next_idx = 0; |
6880b25d KS |
1153 | unsigned int j; |
1154 | ||
1155 | /* find smallest value */ | |
1156 | for (j = start; j < end; j++) { | |
ac218d9c | 1157 | if (rule_tmp->token[j].type == TK_UNSET) |
6880b25d | 1158 | continue; |
ac218d9c | 1159 | if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) { |
6880b25d KS |
1160 | next_val = rule_tmp->token[j].type; |
1161 | next_idx = j; | |
db6e59df | 1162 | } |
5618b561 | 1163 | } |
5618b561 | 1164 | |
6880b25d KS |
1165 | /* add token and mark done */ |
1166 | if (add_token(rules, &rule_tmp->token[next_idx]) != 0) | |
1167 | return -1; | |
ac218d9c | 1168 | rule_tmp->token[next_idx].type = TK_UNSET; |
956cf793 | 1169 | |
6880b25d KS |
1170 | /* shrink range */ |
1171 | if (next_idx == start) | |
1172 | start++; | |
1173 | if (next_idx+1 == end) | |
1174 | end--; | |
d0c8cb7d | 1175 | } |
e57e7bc1 | 1176 | return 0; |
724257d9 GKH |
1177 | } |
1178 | ||
6880b25d KS |
1179 | static int add_rule(struct udev_rules *rules, char *line, |
1180 | const char *filename, unsigned int filename_off, unsigned int lineno) | |
724257d9 | 1181 | { |
6880b25d KS |
1182 | char *linepos; |
1183 | char *attr; | |
6880b25d | 1184 | struct rule_tmp rule_tmp; |
6d87ee2e KS |
1185 | bool bus_warn = false; |
1186 | bool sysfs_warn = false; | |
1187 | bool id_warn = false; | |
724257d9 | 1188 | |
6880b25d KS |
1189 | memset(&rule_tmp, 0x00, sizeof(struct rule_tmp)); |
1190 | rule_tmp.rules = rules; | |
1191 | rule_tmp.rule.type = TK_RULE; | |
1192 | rule_tmp.rule.rule.filename_off = filename_off; | |
0ef254d5 | 1193 | rule_tmp.rule.rule.filename_line = lineno; |
724257d9 | 1194 | |
6880b25d | 1195 | linepos = line; |
88cbfb09 | 1196 | for (;;) { |
6880b25d KS |
1197 | char *key; |
1198 | char *value; | |
ac218d9c | 1199 | enum operation_type op; |
6880b25d KS |
1200 | |
1201 | if (get_key(rules->udev, &linepos, &key, &op, &value) != 0) | |
6bf0ffe8 KS |
1202 | break; |
1203 | ||
bd75fddb | 1204 | if (strcmp(key, "ACTION") == 0) { |
b0f7409f | 1205 | if (op > OP_MATCH_MAX) { |
6880b25d KS |
1206 | err(rules->udev, "invalid ACTION operation\n"); |
1207 | goto invalid; | |
1208 | } | |
0ef254d5 | 1209 | rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL); |
bf5d2964 KS |
1210 | continue; |
1211 | } | |
1212 | ||
bd75fddb | 1213 | if (strcmp(key, "DEVPATH") == 0) { |
b0f7409f | 1214 | if (op > OP_MATCH_MAX) { |
6880b25d KS |
1215 | err(rules->udev, "invalid DEVPATH operation\n"); |
1216 | goto invalid; | |
fd9efc00 | 1217 | } |
0ef254d5 | 1218 | rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL); |
6880b25d KS |
1219 | continue; |
1220 | } | |
c7521974 | 1221 | |
bd75fddb | 1222 | if (strcmp(key, "KERNEL") == 0) { |
b0f7409f | 1223 | if (op > OP_MATCH_MAX) { |
c7521974 KS |
1224 | err(rules->udev, "invalid KERNEL operation\n"); |
1225 | goto invalid; | |
1226 | } | |
0ef254d5 | 1227 | rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL); |
c7521974 KS |
1228 | continue; |
1229 | } | |
1230 | ||
bd75fddb | 1231 | if (strcmp(key, "SUBSYSTEM") == 0) { |
b0f7409f | 1232 | if (op > OP_MATCH_MAX) { |
c7521974 KS |
1233 | err(rules->udev, "invalid SUBSYSTEM operation\n"); |
1234 | goto invalid; | |
1235 | } | |
1236 | /* bus, class, subsystem events should all be the same */ | |
1237 | if (strcmp(value, "subsystem") == 0 || | |
1238 | strcmp(value, "bus") == 0 || | |
1239 | strcmp(value, "class") == 0) { | |
1240 | if (strcmp(value, "bus") == 0 || strcmp(value, "class") == 0) | |
1241 | err(rules->udev, "'%s' must be specified as 'subsystem' \n" | |
1242 | "please fix it in %s:%u", value, filename, lineno); | |
0ef254d5 | 1243 | rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL); |
c7521974 | 1244 | } else |
0ef254d5 | 1245 | rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL); |
c7521974 KS |
1246 | continue; |
1247 | } | |
1248 | ||
bd75fddb | 1249 | if (strcmp(key, "DRIVER") == 0) { |
b0f7409f | 1250 | if (op > OP_MATCH_MAX) { |
c7521974 KS |
1251 | err(rules->udev, "invalid DRIVER operation\n"); |
1252 | goto invalid; | |
1253 | } | |
0ef254d5 | 1254 | rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL); |
c7521974 KS |
1255 | continue; |
1256 | } | |
1257 | ||
bd75fddb | 1258 | if (strncmp(key, "ATTR{", sizeof("ATTR{")-1) == 0) { |
6880b25d | 1259 | attr = get_key_attribute(rules->udev, key + sizeof("ATTR")-1); |
c7521974 KS |
1260 | if (attr == NULL) { |
1261 | err(rules->udev, "error parsing ATTR attribute\n"); | |
1262 | goto invalid; | |
1263 | } | |
b0f7409f | 1264 | if (op < OP_MATCH_MAX) { |
0ef254d5 | 1265 | rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr); |
6880b25d | 1266 | } else { |
0ef254d5 | 1267 | rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr); |
6880b25d | 1268 | } |
c7521974 KS |
1269 | continue; |
1270 | } | |
1271 | ||
6d87ee2e | 1272 | if (strcmp(key, "KERNELS") == 0) { |
b0f7409f | 1273 | if (op > OP_MATCH_MAX) { |
c7521974 KS |
1274 | err(rules->udev, "invalid KERNELS operation\n"); |
1275 | goto invalid; | |
1276 | } | |
0ef254d5 | 1277 | rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL); |
c7521974 KS |
1278 | continue; |
1279 | } | |
1280 | ||
6d87ee2e KS |
1281 | if (strcmp(key, "ID") == 0) { |
1282 | if (!id_warn) { | |
1283 | id_warn = true; | |
1284 | err(rules->udev, "ID= will be removed in a future udev version, " | |
1285 | "please use KERNEL= to match the event device, or KERNELS= " | |
1286 | "to match a parent device, in %s:%u\n", filename, lineno); | |
1287 | } | |
1288 | if (op > OP_MATCH_MAX) { | |
1289 | err(rules->udev, "invalid KERNELS operation\n"); | |
1290 | goto invalid; | |
1291 | } | |
1292 | rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL); | |
1293 | continue; | |
1294 | } | |
1295 | ||
1296 | if (strcmp(key, "SUBSYSTEMS") == 0) { | |
1297 | if (op > OP_MATCH_MAX) { | |
1298 | err(rules->udev, "invalid SUBSYSTEMS operation\n"); | |
1299 | goto invalid; | |
1300 | } | |
1301 | rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL); | |
1302 | continue; | |
1303 | } | |
1304 | ||
1305 | if (strcmp(key, "BUS") == 0) { | |
1306 | if (!bus_warn) { | |
1307 | bus_warn = true; | |
1308 | err(rules->udev, "BUS= will be removed in a future udev version, " | |
1309 | "please use SUBSYSTEM= to match the event device, or SUBSYSTEMS= " | |
1310 | "to match a parent device, in %s:%u\n", filename, lineno); | |
1311 | } | |
b0f7409f | 1312 | if (op > OP_MATCH_MAX) { |
c7521974 KS |
1313 | err(rules->udev, "invalid SUBSYSTEMS operation\n"); |
1314 | goto invalid; | |
1315 | } | |
0ef254d5 | 1316 | rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL); |
c7521974 KS |
1317 | continue; |
1318 | } | |
1319 | ||
bd75fddb | 1320 | if (strcmp(key, "DRIVERS") == 0) { |
b0f7409f | 1321 | if (op > OP_MATCH_MAX) { |
c7521974 KS |
1322 | err(rules->udev, "invalid DRIVERS operation\n"); |
1323 | goto invalid; | |
1324 | } | |
0ef254d5 | 1325 | rule_add_key(&rule_tmp, TK_M_DRIVERS, op, value, NULL); |
c7521974 KS |
1326 | continue; |
1327 | } | |
1328 | ||
6d87ee2e | 1329 | if (strncmp(key, "ATTRS{", sizeof("ATTRS{")-1) == 0) { |
b0f7409f | 1330 | if (op > OP_MATCH_MAX) { |
c7521974 KS |
1331 | err(rules->udev, "invalid ATTRS operation\n"); |
1332 | goto invalid; | |
1333 | } | |
6880b25d | 1334 | attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1); |
c7521974 KS |
1335 | if (attr == NULL) { |
1336 | err(rules->udev, "error parsing ATTRS attribute\n"); | |
1337 | goto invalid; | |
1338 | } | |
1339 | if (strncmp(attr, "device/", 7) == 0) | |
1340 | err(rules->udev, "the 'device' link may not be available in a future kernel, " | |
1341 | "please fix it in %s:%u", filename, lineno); | |
1342 | else if (strstr(attr, "../") != NULL) | |
1343 | err(rules->udev, "do not reference parent sysfs directories directly, " | |
1344 | "it may break with a future kernel, please fix it in %s:%u", filename, lineno); | |
0ef254d5 | 1345 | rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr); |
c7521974 KS |
1346 | continue; |
1347 | } | |
1348 | ||
7df0ed83 KS |
1349 | if (strcmp(key, "TAGS") == 0) { |
1350 | if (op > OP_MATCH_MAX) { | |
1351 | err(rules->udev, "invalid TAGS operation\n"); | |
1352 | goto invalid; | |
1353 | } | |
1354 | rule_add_key(&rule_tmp, TK_M_TAGS, op, value, NULL); | |
1355 | continue; | |
1356 | } | |
1357 | ||
6d87ee2e KS |
1358 | if (strncmp(key, "SYSFS{", sizeof("SYSFS{")-1) == 0) { |
1359 | if (!sysfs_warn) { | |
1360 | sysfs_warn = true; | |
1361 | err(rules->udev, "SYSFS{}= will be removed in a future udev version, " | |
1362 | "please use ATTR{}= to match the event device, or ATTRS{}= " | |
1363 | "to match a parent device, in %s:%u\n", filename, lineno); | |
1364 | } | |
1365 | if (op > OP_MATCH_MAX) { | |
1366 | err(rules->udev, "invalid ATTRS operation\n"); | |
1367 | goto invalid; | |
1368 | } | |
1369 | attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1); | |
1370 | if (attr == NULL) { | |
1371 | err(rules->udev, "error parsing ATTRS attribute\n"); | |
1372 | goto invalid; | |
1373 | } | |
1374 | rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr); | |
1375 | continue; | |
1376 | } | |
1377 | ||
bd75fddb | 1378 | if (strncmp(key, "ENV{", sizeof("ENV{")-1) == 0) { |
6880b25d | 1379 | attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1); |
c7521974 KS |
1380 | if (attr == NULL) { |
1381 | err(rules->udev, "error parsing ENV attribute\n"); | |
1382 | goto invalid; | |
1383 | } | |
b0f7409f | 1384 | if (op < OP_MATCH_MAX) { |
0ef254d5 | 1385 | if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0) |
6880b25d KS |
1386 | goto invalid; |
1387 | } else { | |
ace6bfa7 KS |
1388 | static const char *blacklist[] = { |
1389 | "ACTION", | |
1390 | "SUBSYSTEM", | |
1391 | "DEVTYPE", | |
1392 | "MAJOR", | |
1393 | "MINOR", | |
1394 | "DRIVER", | |
1395 | "IFINDEX", | |
1396 | "DEVNAME", | |
1397 | "DEVLINKS", | |
1398 | "DEVPATH", | |
1399 | "TAGS", | |
1400 | }; | |
1401 | unsigned int i; | |
1402 | ||
1403 | for (i = 0; i < ARRAY_SIZE(blacklist); i++) | |
1404 | if (strcmp(attr, blacklist[i]) == 0) { | |
1405 | err(rules->udev, "invalid ENV attribute, '%s' can not be set %s:%u\n", attr, filename, lineno); | |
1406 | continue; | |
1407 | } | |
0ef254d5 | 1408 | if (rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr) != 0) |
6880b25d KS |
1409 | goto invalid; |
1410 | } | |
c7521974 KS |
1411 | continue; |
1412 | } | |
1413 | ||
28460195 | 1414 | if (strcmp(key, "TAG") == 0) { |
3f896a2a KS |
1415 | if (op < OP_MATCH_MAX) |
1416 | rule_add_key(&rule_tmp, TK_M_TAG, op, value, NULL); | |
1417 | else | |
1418 | rule_add_key(&rule_tmp, TK_A_TAG, op, value, NULL); | |
28460195 KS |
1419 | continue; |
1420 | } | |
1421 | ||
bd75fddb | 1422 | if (strcmp(key, "PROGRAM") == 0) { |
0ef254d5 | 1423 | rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL); |
c7521974 KS |
1424 | continue; |
1425 | } | |
1426 | ||
bd75fddb | 1427 | if (strcmp(key, "RESULT") == 0) { |
b0f7409f | 1428 | if (op > OP_MATCH_MAX) { |
c7521974 KS |
1429 | err(rules->udev, "invalid RESULT operation\n"); |
1430 | goto invalid; | |
1431 | } | |
0ef254d5 | 1432 | rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL); |
c7521974 KS |
1433 | continue; |
1434 | } | |
1435 | ||
bd75fddb | 1436 | if (strncmp(key, "IMPORT", sizeof("IMPORT")-1) == 0) { |
6880b25d | 1437 | attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1); |
c7521974 KS |
1438 | if (attr != NULL && strstr(attr, "program")) { |
1439 | dbg(rules->udev, "IMPORT will be executed\n"); | |
0ef254d5 | 1440 | rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL); |
c7521974 KS |
1441 | } else if (attr != NULL && strstr(attr, "file")) { |
1442 | dbg(rules->udev, "IMPORT will be included as file\n"); | |
0ef254d5 | 1443 | rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL); |
5539f624 KS |
1444 | } else if (attr != NULL && strstr(attr, "db")) { |
1445 | dbg(rules->udev, "IMPORT will include db values\n"); | |
1446 | rule_add_key(&rule_tmp, TK_M_IMPORT_DB, op, value, NULL); | |
c4f6dcc4 KS |
1447 | } else if (attr != NULL && strstr(attr, "cmdline")) { |
1448 | dbg(rules->udev, "IMPORT will include db values\n"); | |
1449 | rule_add_key(&rule_tmp, TK_M_IMPORT_CMDLINE, op, value, NULL); | |
c7521974 KS |
1450 | } else if (attr != NULL && strstr(attr, "parent")) { |
1451 | dbg(rules->udev, "IMPORT will include the parent values\n"); | |
0ef254d5 | 1452 | rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL); |
c7521974 KS |
1453 | } else { |
1454 | /* figure it out if it is executable */ | |
1455 | char file[UTIL_PATH_SIZE]; | |
1456 | char *pos; | |
1457 | struct stat statbuf; | |
1458 | ||
065db052 KS |
1459 | /* allow programs in /lib/udev called without the path */ |
1460 | if (value[0] != '/') | |
6133f343 | 1461 | util_strscpyl(file, sizeof(file), LIBEXECDIR "/", value, NULL); |
065db052 KS |
1462 | else |
1463 | util_strscpy(file, sizeof(file), value); | |
c7521974 KS |
1464 | pos = strchr(file, ' '); |
1465 | if (pos) | |
1466 | pos[0] = '\0'; | |
c7521974 | 1467 | dbg(rules->udev, "IMPORT auto mode for '%s'\n", file); |
065db052 | 1468 | if (stat(file, &statbuf) == 0 && (statbuf.st_mode & S_IXUSR)) { |
6880b25d | 1469 | dbg(rules->udev, "IMPORT will be executed (autotype)\n"); |
0ef254d5 | 1470 | rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL); |
c7521974 | 1471 | } else { |
6880b25d | 1472 | dbg(rules->udev, "IMPORT will be included as file (autotype)\n"); |
0ef254d5 | 1473 | rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL); |
c7521974 KS |
1474 | } |
1475 | } | |
c7521974 KS |
1476 | continue; |
1477 | } | |
1478 | ||
bd75fddb | 1479 | if (strncmp(key, "TEST", sizeof("TEST")-1) == 0) { |
6880b25d KS |
1480 | mode_t mode = 0; |
1481 | ||
b0f7409f | 1482 | if (op > OP_MATCH_MAX) { |
c7521974 KS |
1483 | err(rules->udev, "invalid TEST operation\n"); |
1484 | goto invalid; | |
1485 | } | |
6880b25d KS |
1486 | attr = get_key_attribute(rules->udev, key + sizeof("TEST")-1); |
1487 | if (attr != NULL) { | |
1488 | mode = strtol(attr, NULL, 8); | |
0ef254d5 | 1489 | rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode); |
6880b25d | 1490 | } else { |
0ef254d5 | 1491 | rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL); |
6880b25d | 1492 | } |
c7521974 KS |
1493 | continue; |
1494 | } | |
1495 | ||
bd75fddb | 1496 | if (strncmp(key, "RUN", sizeof("RUN")-1) == 0) { |
6880b25d KS |
1497 | int flag = 0; |
1498 | ||
1499 | attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1); | |
16dd0aa9 | 1500 | if (attr != NULL && strstr(attr, "fail_event_on_error")) |
6880b25d | 1501 | flag = 1; |
0ef254d5 | 1502 | rule_add_key(&rule_tmp, TK_A_RUN, op, value, &flag); |
c7521974 KS |
1503 | continue; |
1504 | } | |
1505 | ||
bd75fddb | 1506 | if (strcmp(key, "WAIT_FOR") == 0 || strcmp(key, "WAIT_FOR_SYSFS") == 0) { |
0ef254d5 | 1507 | rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL); |
c7521974 KS |
1508 | continue; |
1509 | } | |
1510 | ||
bd75fddb | 1511 | if (strcmp(key, "LABEL") == 0) { |
6880b25d | 1512 | rule_tmp.rule.rule.label_off = add_string(rules, value); |
c7521974 KS |
1513 | continue; |
1514 | } | |
1515 | ||
bd75fddb | 1516 | if (strcmp(key, "GOTO") == 0) { |
0ef254d5 | 1517 | rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL); |
c7521974 KS |
1518 | continue; |
1519 | } | |
1520 | ||
bd75fddb | 1521 | if (strncmp(key, "NAME", sizeof("NAME")-1) == 0) { |
b0f7409f | 1522 | if (op < OP_MATCH_MAX) { |
0ef254d5 | 1523 | rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL); |
6880b25d | 1524 | } else { |
75cb1ac5 | 1525 | if (strcmp(value, "%k") == 0) { |
d0d7b8d0 | 1526 | err(rules->udev, "NAME=\"%%k\" is ignored, because it breaks kernel supplied names, " |
75cb1ac5 KS |
1527 | "please remove it from %s:%u\n", filename, lineno); |
1528 | continue; | |
1529 | } | |
d0d7b8d0 KS |
1530 | if (value[0] == '\0') { |
1531 | info(rules->udev, "NAME=\"\" is ignored, because udev will not delete any device nodes, " | |
1532 | "please remove it from %s:%u\n", filename, lineno); | |
75cb1ac5 | 1533 | continue; |
d0d7b8d0 | 1534 | } |
0ef254d5 | 1535 | rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL); |
c7521974 | 1536 | } |
761dfddc | 1537 | rule_tmp.rule.rule.can_set_name = true; |
c7521974 KS |
1538 | continue; |
1539 | } | |
1540 | ||
bcb8b231 | 1541 | if (strncmp(key, "SYMLINK", sizeof("SYMLINK")-1) == 0) { |
6c29f2b9 | 1542 | if (op < OP_MATCH_MAX) { |
0ef254d5 | 1543 | rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL); |
6c29f2b9 KS |
1544 | } else { |
1545 | int flag = 0; | |
1546 | ||
1547 | attr = get_key_attribute(rules->udev, key + sizeof("SYMLINK")-1); | |
1548 | if (attr != NULL && strstr(attr, "unique") != NULL) | |
1549 | flag = 1; | |
1550 | rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, &flag); | |
1551 | } | |
761dfddc | 1552 | rule_tmp.rule.rule.can_set_name = true; |
b0f7409f KS |
1553 | continue; |
1554 | } | |
c7521974 | 1555 | |
bd75fddb | 1556 | if (strcmp(key, "OWNER") == 0) { |
6880b25d KS |
1557 | uid_t uid; |
1558 | char *endptr; | |
1559 | ||
1560 | uid = strtoul(value, &endptr, 10); | |
1561 | if (endptr[0] == '\0') { | |
0ef254d5 | 1562 | rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid); |
5f03ed8a | 1563 | } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) { |
154a7b84 | 1564 | uid = add_uid(rules, value); |
0ef254d5 | 1565 | rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid); |
055e40ed | 1566 | } else if (rules->resolve_names >= 0) { |
0ef254d5 | 1567 | rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL); |
c7521974 | 1568 | } |
761dfddc | 1569 | rule_tmp.rule.rule.can_set_name = true; |
c7521974 KS |
1570 | continue; |
1571 | } | |
1572 | ||
bd75fddb | 1573 | if (strcmp(key, "GROUP") == 0) { |
6880b25d KS |
1574 | gid_t gid; |
1575 | char *endptr; | |
1576 | ||
1577 | gid = strtoul(value, &endptr, 10); | |
1578 | if (endptr[0] == '\0') { | |
0ef254d5 | 1579 | rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid); |
5f03ed8a | 1580 | } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) { |
154a7b84 | 1581 | gid = add_gid(rules, value); |
0ef254d5 | 1582 | rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid); |
055e40ed | 1583 | } else if (rules->resolve_names >= 0) { |
0ef254d5 | 1584 | rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL); |
c7521974 | 1585 | } |
761dfddc | 1586 | rule_tmp.rule.rule.can_set_name = true; |
c7521974 KS |
1587 | continue; |
1588 | } | |
1589 | ||
bd75fddb | 1590 | if (strcmp(key, "MODE") == 0) { |
6880b25d KS |
1591 | mode_t mode; |
1592 | char *endptr; | |
1593 | ||
1594 | mode = strtol(value, &endptr, 8); | |
1595 | if (endptr[0] == '\0') | |
0ef254d5 | 1596 | rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode); |
6880b25d | 1597 | else |
0ef254d5 | 1598 | rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL); |
761dfddc | 1599 | rule_tmp.rule.rule.can_set_name = true; |
c7521974 KS |
1600 | continue; |
1601 | } | |
1602 | ||
bd75fddb | 1603 | if (strcmp(key, "OPTIONS") == 0) { |
c7521974 KS |
1604 | const char *pos; |
1605 | ||
c7521974 KS |
1606 | pos = strstr(value, "link_priority="); |
1607 | if (pos != NULL) { | |
6880b25d KS |
1608 | int prio = atoi(&pos[strlen("link_priority=")]); |
1609 | ||
3b529da4 | 1610 | rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, op, NULL, &prio); |
6880b25d | 1611 | dbg(rules->udev, "link priority=%i\n", prio); |
c7521974 | 1612 | } |
9ead6627 | 1613 | |
c7521974 KS |
1614 | pos = strstr(value, "event_timeout="); |
1615 | if (pos != NULL) { | |
6880b25d KS |
1616 | int tout = atoi(&pos[strlen("event_timeout=")]); |
1617 | ||
2181d30a | 1618 | rule_add_key(&rule_tmp, TK_M_EVENT_TIMEOUT, op, NULL, &tout); |
214a6c79 | 1619 | dbg(rules->udev, "event timeout=%i\n", tout); |
c7521974 | 1620 | } |
9ead6627 | 1621 | |
c7521974 KS |
1622 | pos = strstr(value, "string_escape="); |
1623 | if (pos != NULL) { | |
1624 | pos = &pos[strlen("string_escape=")]; | |
1625 | if (strncmp(pos, "none", strlen("none")) == 0) | |
3b529da4 | 1626 | rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, op, NULL, NULL); |
c7521974 | 1627 | else if (strncmp(pos, "replace", strlen("replace")) == 0) |
3b529da4 | 1628 | rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, op, NULL, NULL); |
c7521974 | 1629 | } |
9ead6627 | 1630 | |
d3990a57 | 1631 | pos = strstr(value, "db_persist"); |
9ead6627 KS |
1632 | if (pos != NULL) |
1633 | rule_add_key(&rule_tmp, TK_A_DB_PERSIST, op, NULL, NULL); | |
1634 | ||
46f194cb | 1635 | pos = strstr(value, "nowatch"); |
bd284db1 | 1636 | if (pos != NULL) { |
46f194cb KS |
1637 | const int off = 0; |
1638 | ||
3b529da4 | 1639 | rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &off); |
46f194cb KS |
1640 | dbg(rules->udev, "inotify watch of device disabled\n"); |
1641 | } else { | |
1642 | pos = strstr(value, "watch"); | |
1643 | if (pos != NULL) { | |
1644 | const int on = 1; | |
1645 | ||
3b529da4 | 1646 | rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &on); |
46f194cb KS |
1647 | dbg(rules->udev, "inotify watch of device requested\n"); |
1648 | } | |
bd284db1 | 1649 | } |
9ead6627 | 1650 | |
761dfddc KS |
1651 | pos = strstr(value, "static_node="); |
1652 | if (pos != NULL) { | |
3b529da4 | 1653 | rule_add_key(&rule_tmp, TK_A_STATIC_NODE, op, &pos[strlen("static_node=")], NULL); |
761dfddc KS |
1654 | rule_tmp.rule.rule.has_static_node = true; |
1655 | } | |
9ead6627 | 1656 | |
c7521974 KS |
1657 | continue; |
1658 | } | |
c7521974 KS |
1659 | err(rules->udev, "unknown key '%s' in %s:%u\n", key, filename, lineno); |
1660 | } | |
1661 | ||
6880b25d | 1662 | /* add rule token */ |
3f3aa9f5 | 1663 | rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur; |
6880b25d KS |
1664 | if (add_token(rules, &rule_tmp.rule) != 0) |
1665 | goto invalid; | |
c7521974 | 1666 | |
6880b25d KS |
1667 | /* add tokens to list, sorted by type */ |
1668 | if (sort_token(rules, &rule_tmp) != 0) | |
1669 | goto invalid; | |
3f3aa9f5 | 1670 | |
6880b25d | 1671 | return 0; |
c7521974 KS |
1672 | invalid: |
1673 | err(rules->udev, "invalid rule '%s:%u'\n", filename, lineno); | |
1674 | return -1; | |
1675 | } | |
1676 | ||
0ef254d5 | 1677 | static int parse_file(struct udev_rules *rules, const char *filename, unsigned short filename_off) |
c7521974 KS |
1678 | { |
1679 | FILE *f; | |
77f89e93 | 1680 | unsigned int first_token; |
c7521974 | 1681 | char line[UTIL_LINE_SIZE]; |
6880b25d KS |
1682 | int line_nr = 0; |
1683 | unsigned int i; | |
c7521974 | 1684 | |
c7521974 KS |
1685 | info(rules->udev, "reading '%s' as rules file\n", filename); |
1686 | ||
1687 | f = fopen(filename, "r"); | |
1688 | if (f == NULL) | |
1689 | return -1; | |
77f89e93 KS |
1690 | |
1691 | first_token = rules->token_cur; | |
1692 | ||
335e316a | 1693 | while (fgets(line, sizeof(line), f) != NULL) { |
c7521974 KS |
1694 | char *key; |
1695 | size_t len; | |
1696 | ||
1697 | /* skip whitespace */ | |
1698 | line_nr++; | |
1699 | key = line; | |
1700 | while (isspace(key[0])) | |
1701 | key++; | |
1702 | ||
1703 | /* comment */ | |
1704 | if (key[0] == '#') | |
1705 | continue; | |
1706 | ||
1707 | len = strlen(line); | |
1708 | if (len < 3) | |
1709 | continue; | |
1710 | ||
1711 | /* continue reading if backslash+newline is found */ | |
1712 | while (line[len-2] == '\\') { | |
1713 | if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL) | |
1714 | break; | |
6d691b2b FZ |
1715 | if (strlen(&line[len-2]) < 2) |
1716 | break; | |
c7521974 KS |
1717 | line_nr++; |
1718 | len = strlen(line); | |
1719 | } | |
1720 | ||
1721 | if (len+1 >= sizeof(line)) { | |
1722 | err(rules->udev, "line too long '%s':%u, ignored\n", filename, line_nr); | |
1723 | continue; | |
1724 | } | |
6880b25d | 1725 | add_rule(rules, key, filename, filename_off, line_nr); |
c7521974 KS |
1726 | } |
1727 | fclose(f); | |
1728 | ||
6880b25d | 1729 | /* link GOTOs to LABEL rules in this file to be able to fast-forward */ |
77f89e93 | 1730 | for (i = first_token+1; i < rules->token_cur; i++) { |
6880b25d KS |
1731 | if (rules->tokens[i].type == TK_A_GOTO) { |
1732 | char *label = &rules->buf[rules->tokens[i].key.value_off]; | |
1733 | unsigned int j; | |
1734 | ||
1735 | for (j = i+1; j < rules->token_cur; j++) { | |
1736 | if (rules->tokens[j].type != TK_RULE) | |
1737 | continue; | |
1738 | if (rules->tokens[j].rule.label_off == 0) | |
1739 | continue; | |
1740 | if (strcmp(label, &rules->buf[rules->tokens[j].rule.label_off]) != 0) | |
1741 | continue; | |
1742 | rules->tokens[i].key.rule_goto = j; | |
0c377989 | 1743 | break; |
c7521974 | 1744 | } |
6880b25d KS |
1745 | if (rules->tokens[i].key.rule_goto == 0) |
1746 | err(rules->udev, "GOTO '%s' has no matching label in: '%s'\n", label, filename); | |
c7521974 KS |
1747 | } |
1748 | } | |
1749 | return 0; | |
1750 | } | |
1751 | ||
1752 | static int add_matching_files(struct udev *udev, struct udev_list_node *file_list, const char *dirname, const char *suffix) | |
1753 | { | |
c7521974 | 1754 | DIR *dir; |
c7c32e9c | 1755 | struct dirent *dent; |
c7521974 KS |
1756 | char filename[UTIL_PATH_SIZE]; |
1757 | ||
1758 | dbg(udev, "open directory '%s'\n", dirname); | |
1759 | dir = opendir(dirname); | |
1760 | if (dir == NULL) { | |
92e52e2f | 1761 | info(udev, "unable to open '%s': %m\n", dirname); |
c7521974 KS |
1762 | return -1; |
1763 | } | |
1764 | ||
c7c32e9c | 1765 | for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) { |
78230c0d | 1766 | if (dent->d_name[0] == '.') |
c7521974 KS |
1767 | continue; |
1768 | ||
1769 | /* look for file matching with specified suffix */ | |
1770 | if (suffix != NULL) { | |
1771 | const char *ext; | |
1772 | ||
78230c0d | 1773 | ext = strrchr(dent->d_name, '.'); |
c7521974 KS |
1774 | if (ext == NULL) |
1775 | continue; | |
1776 | if (strcmp(ext, suffix) != 0) | |
1777 | continue; | |
1778 | } | |
e6c1a2bd KS |
1779 | util_strscpyl(filename, sizeof(filename), dirname, "/", dent->d_name, NULL); |
1780 | dbg(udev, "put file '%s' into list\n", filename); | |
c7c32e9c KS |
1781 | /* |
1782 | * the basename is the key, the filename the value | |
1783 | * identical basenames from different directories overwrite each other | |
1784 | * entries are sorted after basename | |
1785 | */ | |
8958da13 | 1786 | udev_list_entry_add(udev, file_list, dent->d_name, filename, UDEV_LIST_UNIQUE|UDEV_LIST_SORT); |
c7521974 KS |
1787 | } |
1788 | ||
1789 | closedir(dir); | |
1790 | return 0; | |
1791 | } | |
1792 | ||
d7ddce18 | 1793 | struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names) |
c7521974 | 1794 | { |
d7ddce18 | 1795 | struct udev_rules *rules; |
c7521974 | 1796 | struct udev_list_node file_list; |
c7c32e9c | 1797 | struct udev_list_entry *file_loop; |
6880b25d | 1798 | struct token end_token; |
c7521974 | 1799 | |
27f4528b | 1800 | rules = calloc(1, sizeof(struct udev_rules)); |
d7ddce18 | 1801 | if (rules == NULL) |
6880b25d | 1802 | return NULL; |
c7521974 KS |
1803 | rules->udev = udev; |
1804 | rules->resolve_names = resolve_names; | |
1805 | udev_list_init(&file_list); | |
1806 | ||
6880b25d KS |
1807 | /* init token array and string buffer */ |
1808 | rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token)); | |
1851332c YK |
1809 | if (rules->tokens == NULL) { |
1810 | free(rules); | |
34d6a259 | 1811 | return NULL; |
1851332c | 1812 | } |
34d6a259 | 1813 | rules->token_max = PREALLOC_TOKEN; |
bcf44d55 | 1814 | |
6880b25d | 1815 | rules->buf = malloc(PREALLOC_STRBUF); |
1851332c YK |
1816 | if (rules->buf == NULL) { |
1817 | free(rules->tokens); | |
1818 | free(rules); | |
34d6a259 | 1819 | return NULL; |
1851332c | 1820 | } |
34d6a259 KS |
1821 | rules->buf_max = PREALLOC_STRBUF; |
1822 | /* offset 0 is always '\0' */ | |
1823 | rules->buf[0] = '\0'; | |
1824 | rules->buf_cur = 1; | |
86b57788 KS |
1825 | dbg(udev, "prealloc %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n", |
1826 | rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max); | |
6880b25d | 1827 | |
bcf44d55 | 1828 | rules->trie_nodes = malloc(PREALLOC_TRIE * sizeof(struct trie_node)); |
1851332c YK |
1829 | if (rules->trie_nodes == NULL) { |
1830 | free(rules->buf); | |
1831 | free(rules->tokens); | |
1832 | free(rules); | |
bcf44d55 | 1833 | return NULL; |
1851332c | 1834 | } |
bcf44d55 | 1835 | rules->trie_nodes_max = PREALLOC_TRIE; |
949075db | 1836 | /* offset 0 is the trie root, with an empty string */ |
023ed7b0 | 1837 | memset(rules->trie_nodes, 0x00, sizeof(struct trie_node)); |
bcf44d55 KS |
1838 | rules->trie_nodes_cur = 1; |
1839 | ||
c7c32e9c KS |
1840 | if (udev_get_rules_path(udev) == NULL) { |
1841 | char filename[UTIL_PATH_SIZE]; | |
c7521974 | 1842 | |
c7c32e9c KS |
1843 | /* /lib/udev -- default/package rules */ |
1844 | add_matching_files(udev, &file_list, LIBEXECDIR "/rules.d", ".rules"); | |
1845 | ||
1846 | /* /etc/udev -- system-specific/user/admin rules */ | |
c7521974 KS |
1847 | add_matching_files(udev, &file_list, SYSCONFDIR "/udev/rules.d", ".rules"); |
1848 | ||
c7c32e9c | 1849 | /* /run/udev -- throw-away/temporary rules */ |
4ec9c3e7 | 1850 | util_strscpyl(filename, sizeof(filename), udev_get_run_path(udev), "/rules.d", NULL); |
c7c32e9c KS |
1851 | add_matching_files(udev, &file_list, filename, ".rules"); |
1852 | } else { | |
1853 | /* custom rules files location for testing */ | |
1854 | add_matching_files(udev, &file_list, udev_get_rules_path(udev), ".rules"); | |
c7521974 KS |
1855 | } |
1856 | ||
0ef254d5 KS |
1857 | /* add all filenames to the string buffer */ |
1858 | udev_list_entry_foreach(file_loop, udev_list_get_entry(&file_list)) { | |
c7c32e9c | 1859 | const char *filename = udev_list_entry_get_value(file_loop); |
0ef254d5 KS |
1860 | unsigned int filename_off; |
1861 | ||
1862 | filename_off = add_string(rules, filename); | |
1863 | /* the offset in the rule is limited to unsigned short */ | |
1864 | if (filename_off < USHRT_MAX) | |
8958da13 | 1865 | udev_list_entry_set_num(file_loop, filename_off); |
0ef254d5 KS |
1866 | } |
1867 | ||
c7c32e9c KS |
1868 | /* parse all rules files */ |
1869 | udev_list_entry_foreach(file_loop, udev_list_get_entry(&file_list)) { | |
1870 | const char *filename = udev_list_entry_get_value(file_loop); | |
8958da13 | 1871 | unsigned int filename_off = udev_list_entry_get_num(file_loop); |
a178e7fe | 1872 | struct stat st; |
c7521974 | 1873 | |
a178e7fe KS |
1874 | if (stat(filename, &st) != 0) { |
1875 | err(udev, "can not find '%s': %m\n", filename); | |
1876 | continue; | |
1877 | } | |
1878 | if (S_ISREG(st.st_mode) && st.st_size <= 0) { | |
1879 | info(udev, "ignore empty '%s'\n", filename); | |
1880 | continue; | |
1881 | } | |
1882 | if (S_ISCHR(st.st_mode)) { | |
1883 | info(udev, "ignore masked '%s'\n", filename); | |
1884 | continue; | |
1885 | } | |
1886 | parse_file(rules, filename, filename_off); | |
c7521974 | 1887 | } |
c7c32e9c | 1888 | udev_list_cleanup_entries(udev, &file_list); |
6880b25d KS |
1889 | |
1890 | memset(&end_token, 0x00, sizeof(struct token)); | |
1891 | end_token.type = TK_END; | |
1892 | add_token(rules, &end_token); | |
1893 | ||
154a7b84 | 1894 | /* shrink allocated token and string buffer */ |
6880b25d KS |
1895 | if (rules->token_cur < rules->token_max) { |
1896 | struct token *tokens; | |
1897 | ||
1898 | tokens = realloc(rules->tokens, rules->token_cur * sizeof(struct token)); | |
1899 | if (tokens != NULL || rules->token_cur == 0) { | |
1900 | rules->tokens = tokens; | |
1901 | rules->token_max = rules->token_cur; | |
1902 | } | |
1903 | } | |
1904 | if (rules->buf_cur < rules->buf_max) { | |
1905 | char *buf; | |
1906 | ||
1907 | buf = realloc(rules->buf, rules->buf_cur); | |
1908 | if (buf != NULL || rules->buf_cur == 0) { | |
1909 | rules->buf = buf; | |
1910 | rules->buf_max = rules->buf_cur; | |
1911 | } | |
1912 | } | |
0dd9f015 | 1913 | info(udev, "rules use %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n", |
6880b25d | 1914 | rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max); |
023ed7b0 KS |
1915 | info(udev, "temporary index used %zu bytes (%u * %zu bytes)\n", |
1916 | rules->trie_nodes_cur * sizeof(struct trie_node), | |
1917 | rules->trie_nodes_cur, sizeof(struct trie_node)); | |
1449a55d AJ |
1918 | |
1919 | /* cleanup trie */ | |
bcf44d55 KS |
1920 | free(rules->trie_nodes); |
1921 | rules->trie_nodes = NULL; | |
1922 | rules->trie_nodes_cur = 0; | |
1923 | rules->trie_nodes_max = 0; | |
6880b25d | 1924 | |
154a7b84 KS |
1925 | /* cleanup uid/gid cache */ |
1926 | free(rules->uids); | |
1927 | rules->uids = NULL; | |
1928 | rules->uids_cur = 0; | |
1929 | rules->uids_max = 0; | |
1930 | free(rules->gids); | |
1931 | rules->gids = NULL; | |
1932 | rules->gids_cur = 0; | |
1933 | rules->gids_max = 0; | |
1934 | ||
6880b25d | 1935 | dump_rules(rules); |
d7ddce18 | 1936 | return rules; |
c7521974 KS |
1937 | } |
1938 | ||
d7ddce18 | 1939 | void udev_rules_unref(struct udev_rules *rules) |
c7521974 | 1940 | { |
d7ddce18 KS |
1941 | if (rules == NULL) |
1942 | return; | |
6880b25d KS |
1943 | free(rules->tokens); |
1944 | free(rules->buf); | |
bcf44d55 | 1945 | free(rules->trie_nodes); |
154a7b84 KS |
1946 | free(rules->uids); |
1947 | free(rules->gids); | |
d7ddce18 | 1948 | free(rules); |
c7521974 | 1949 | } |
6880b25d KS |
1950 | |
1951 | static int match_key(struct udev_rules *rules, struct token *token, const char *val) | |
1952 | { | |
6880b25d KS |
1953 | char *key_value = &rules->buf[token->key.value_off]; |
1954 | char *pos; | |
761dfddc | 1955 | bool match = false; |
6880b25d KS |
1956 | |
1957 | if (val == NULL) | |
1958 | val = ""; | |
1959 | ||
ac218d9c KS |
1960 | switch (token->key.glob) { |
1961 | case GL_PLAIN: | |
1962 | match = (strcmp(key_value, val) == 0); | |
1963 | break; | |
1964 | case GL_GLOB: | |
1965 | match = (fnmatch(key_value, val, 0) == 0); | |
1966 | break; | |
1967 | case GL_SPLIT: | |
1968 | { | |
91a75e4a KS |
1969 | const char *split; |
1970 | size_t len; | |
6880b25d | 1971 | |
91a75e4a KS |
1972 | split = &rules->buf[token->key.value_off]; |
1973 | len = strlen(val); | |
88cbfb09 | 1974 | for (;;) { |
91a75e4a KS |
1975 | const char *next; |
1976 | ||
1977 | next = strchr(split, '|'); | |
1978 | if (next != NULL) { | |
1979 | size_t matchlen = (size_t)(next - split); | |
1980 | ||
1981 | match = (matchlen == len && strncmp(split, val, matchlen) == 0); | |
1982 | if (match) | |
1983 | break; | |
1984 | } else { | |
1985 | match = (strcmp(split, val) == 0); | |
ac218d9c | 1986 | break; |
91a75e4a KS |
1987 | } |
1988 | split = &next[1]; | |
6880b25d | 1989 | } |
ac218d9c | 1990 | break; |
6880b25d | 1991 | } |
ac218d9c KS |
1992 | case GL_SPLIT_GLOB: |
1993 | { | |
1994 | char value[UTIL_PATH_SIZE]; | |
1995 | ||
065db052 | 1996 | util_strscpy(value, sizeof(value), &rules->buf[token->key.value_off]); |
ac218d9c KS |
1997 | key_value = value; |
1998 | while (key_value != NULL) { | |
1999 | pos = strchr(key_value, '|'); | |
2000 | if (pos != NULL) { | |
2001 | pos[0] = '\0'; | |
2002 | pos = &pos[1]; | |
2003 | } | |
5d6a1fa6 | 2004 | dbg(rules->udev, "match %s '%s' <-> '%s'\n", token_str(token->type), key_value, val); |
ac218d9c KS |
2005 | match = (fnmatch(key_value, val, 0) == 0); |
2006 | if (match) | |
2007 | break; | |
2008 | key_value = pos; | |
2009 | } | |
2010 | break; | |
2011 | } | |
db463fd3 KS |
2012 | case GL_SOMETHING: |
2013 | match = (val[0] != '\0'); | |
2014 | break; | |
ac218d9c KS |
2015 | case GL_UNSET: |
2016 | return -1; | |
6880b25d KS |
2017 | } |
2018 | ||
b0f7409f | 2019 | if (match && (token->key.op == OP_MATCH)) { |
5d6a1fa6 | 2020 | dbg(rules->udev, "%s is true (matching value)\n", token_str(token->type)); |
6880b25d KS |
2021 | return 0; |
2022 | } | |
b0f7409f | 2023 | if (!match && (token->key.op == OP_NOMATCH)) { |
5d6a1fa6 | 2024 | dbg(rules->udev, "%s is true (non-matching value)\n", token_str(token->type)); |
6880b25d KS |
2025 | return 0; |
2026 | } | |
5d6a1fa6 | 2027 | dbg(rules->udev, "%s is not true\n", token_str(token->type)); |
6880b25d KS |
2028 | return -1; |
2029 | } | |
2030 | ||
2031 | static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur) | |
2032 | { | |
32028733 KS |
2033 | const char *name; |
2034 | char nbuf[UTIL_NAME_SIZE]; | |
2035 | const char *value; | |
2036 | char vbuf[UTIL_NAME_SIZE]; | |
6880b25d KS |
2037 | size_t len; |
2038 | ||
32028733 KS |
2039 | name = &rules->buf[cur->key.attr_off]; |
2040 | switch (cur->key.attrsubst) { | |
2041 | case SB_FORMAT: | |
2042 | udev_event_apply_format(event, name, nbuf, sizeof(nbuf)); | |
2043 | name = nbuf; | |
2044 | /* fall through */ | |
2045 | case SB_NONE: | |
2046 | value = udev_device_get_sysattr_value(dev, name); | |
2047 | if (value == NULL) | |
aeb53ca3 | 2048 | return -1; |
32028733 KS |
2049 | break; |
2050 | case SB_SUBSYS: | |
2051 | if (util_resolve_subsys_kernel(event->udev, name, vbuf, sizeof(vbuf), 1) != 0) | |
2052 | return -1; | |
2053 | value = vbuf; | |
2054 | break; | |
2055 | default: | |
2056 | return -1; | |
6880b25d | 2057 | } |
6880b25d | 2058 | |
32028733 KS |
2059 | /* remove trailing whitespace, if not asked to match for it */ |
2060 | len = strlen(value); | |
2061 | if (len > 0 && isspace(value[len-1])) { | |
2062 | const char *key_value; | |
2063 | size_t klen; | |
2064 | ||
2065 | key_value = &rules->buf[cur->key.value_off]; | |
2066 | klen = strlen(key_value); | |
2067 | if (klen > 0 && !isspace(key_value[klen-1])) { | |
2068 | if (value != vbuf) { | |
2069 | util_strscpy(vbuf, sizeof(vbuf), value); | |
2070 | value = vbuf; | |
2071 | } | |
2072 | while (len > 0 && isspace(vbuf[--len])) | |
2073 | vbuf[len] = '\0'; | |
2074 | dbg(rules->udev, "removed trailing whitespace from '%s'\n", value); | |
2075 | } | |
6880b25d | 2076 | } |
32028733 | 2077 | |
6880b25d KS |
2078 | return match_key(rules, cur, value); |
2079 | } | |
2080 | ||
2081 | enum escape_type { | |
2082 | ESCAPE_UNSET, | |
2083 | ESCAPE_NONE, | |
2084 | ESCAPE_REPLACE, | |
2085 | }; | |
2086 | ||
2181d30a | 2087 | int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event, const sigset_t *sigmask) |
6880b25d | 2088 | { |
6880b25d | 2089 | struct token *cur; |
34d6a259 | 2090 | struct token *rule; |
3e5c7595 | 2091 | enum escape_type esc = ESCAPE_UNSET; |
4b06c409 | 2092 | bool can_set_name; |
6880b25d KS |
2093 | |
2094 | if (rules->tokens == NULL) | |
2095 | return -1; | |
2096 | ||
4b06c409 | 2097 | can_set_name = ((strcmp(udev_device_get_action(event->dev), "remove") != 0) && |
00f98bd2 | 2098 | (major(udev_device_get_devnum(event->dev)) > 0 || |
ff0e1f4e | 2099 | udev_device_get_ifindex(event->dev) > 0)); |
00f98bd2 | 2100 | |
6880b25d KS |
2101 | /* loop through token list, match, run actions or forward to next rule */ |
2102 | cur = &rules->tokens[0]; | |
34d6a259 | 2103 | rule = cur; |
761dfddc | 2104 | for (;;) { |
6880b25d KS |
2105 | dump_token(rules, cur); |
2106 | switch (cur->type) { | |
2107 | case TK_RULE: | |
2108 | /* current rule */ | |
2109 | rule = cur; | |
00f98bd2 | 2110 | /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */ |
761dfddc | 2111 | if (!can_set_name && rule->rule.can_set_name) |
0c057e9c | 2112 | goto nomatch; |
6880b25d KS |
2113 | esc = ESCAPE_UNSET; |
2114 | break; | |
6880b25d KS |
2115 | case TK_M_ACTION: |
2116 | if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0) | |
2117 | goto nomatch; | |
2118 | break; | |
2119 | case TK_M_DEVPATH: | |
2120 | if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0) | |
2121 | goto nomatch; | |
2122 | break; | |
2123 | case TK_M_KERNEL: | |
2124 | if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0) | |
2125 | goto nomatch; | |
2126 | break; | |
38932b9f KS |
2127 | case TK_M_DEVLINK: { |
2128 | size_t devlen = strlen(udev_get_dev_path(event->udev))+1; | |
2129 | struct udev_list_entry *list_entry; | |
2130 | bool match = false; | |
2131 | ||
2132 | udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) { | |
2133 | const char *devlink; | |
2134 | ||
2135 | devlink = &udev_list_entry_get_name(list_entry)[devlen]; | |
2136 | if (match_key(rules, cur, devlink) == 0) { | |
2137 | match = true; | |
2138 | break; | |
6880b25d | 2139 | } |
6880b25d | 2140 | } |
38932b9f KS |
2141 | if (!match) |
2142 | goto nomatch; | |
2143 | break; | |
2144 | } | |
6880b25d KS |
2145 | case TK_M_NAME: |
2146 | if (match_key(rules, cur, event->name) != 0) | |
2147 | goto nomatch; | |
2148 | break; | |
38932b9f KS |
2149 | case TK_M_ENV: { |
2150 | const char *key_name = &rules->buf[cur->key.attr_off]; | |
2151 | const char *value; | |
2152 | ||
2153 | value = udev_device_get_property_value(event->dev, key_name); | |
2154 | if (value == NULL) { | |
2155 | dbg(event->udev, "ENV{%s} is not set, treat as empty\n", key_name); | |
2156 | value = ""; | |
6880b25d | 2157 | } |
38932b9f KS |
2158 | if (match_key(rules, cur, value)) |
2159 | goto nomatch; | |
2160 | break; | |
2161 | } | |
2162 | case TK_M_TAG: { | |
2163 | struct udev_list_entry *list_entry; | |
2164 | bool match = false; | |
2165 | ||
2166 | udev_list_entry_foreach(list_entry, udev_device_get_tags_list_entry(event->dev)) { | |
2167 | if (strcmp(&rules->buf[cur->key.value_off], udev_list_entry_get_name(list_entry)) == 0) { | |
2168 | match = true; | |
2169 | break; | |
3f896a2a | 2170 | } |
3f896a2a | 2171 | } |
38932b9f KS |
2172 | if (!match && (cur->key.op != OP_NOMATCH)) |
2173 | goto nomatch; | |
2174 | break; | |
2175 | } | |
6880b25d KS |
2176 | case TK_M_SUBSYSTEM: |
2177 | if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0) | |
2178 | goto nomatch; | |
2179 | break; | |
2180 | case TK_M_DRIVER: | |
2181 | if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0) | |
2182 | goto nomatch; | |
2183 | break; | |
38932b9f KS |
2184 | case TK_M_WAITFOR: { |
2185 | char filename[UTIL_PATH_SIZE]; | |
2186 | int found; | |
2187 | ||
2188 | udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename)); | |
2189 | found = (wait_for_file(event->dev, filename, 10) == 0); | |
2190 | if (!found && (cur->key.op != OP_NOMATCH)) | |
2191 | goto nomatch; | |
2192 | break; | |
2193 | } | |
6880b25d KS |
2194 | case TK_M_ATTR: |
2195 | if (match_attr(rules, event->dev, event, cur) != 0) | |
2196 | goto nomatch; | |
2197 | break; | |
2198 | case TK_M_KERNELS: | |
2199 | case TK_M_SUBSYSTEMS: | |
2200 | case TK_M_DRIVERS: | |
7df0ed83 KS |
2201 | case TK_M_ATTRS: |
2202 | case TK_M_TAGS: { | |
38932b9f | 2203 | struct token *next; |
6880b25d | 2204 | |
38932b9f KS |
2205 | /* get whole sequence of parent matches */ |
2206 | next = cur; | |
2207 | while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX) | |
2208 | next++; | |
6880b25d | 2209 | |
38932b9f KS |
2210 | /* loop over parents */ |
2211 | event->dev_parent = event->dev; | |
2212 | for (;;) { | |
2213 | struct token *key; | |
2214 | ||
2215 | dbg(event->udev, "parent: '%s'\n", udev_device_get_syspath(event->dev_parent)); | |
2216 | /* loop over sequence of parent match keys */ | |
2217 | for (key = cur; key < next; key++ ) { | |
2218 | dump_token(rules, key); | |
2219 | switch(key->type) { | |
2220 | case TK_M_KERNELS: | |
2221 | if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0) | |
2222 | goto try_parent; | |
2223 | break; | |
2224 | case TK_M_SUBSYSTEMS: | |
2225 | if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0) | |
2226 | goto try_parent; | |
2227 | break; | |
2228 | case TK_M_DRIVERS: | |
2229 | if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0) | |
2230 | goto try_parent; | |
2231 | break; | |
2232 | case TK_M_ATTRS: | |
2233 | if (match_attr(rules, event->dev_parent, event, key) != 0) | |
2234 | goto try_parent; | |
2235 | break; | |
7df0ed83 KS |
2236 | case TK_M_TAGS: { |
2237 | bool match = udev_device_has_tag(event->dev_parent, &rules->buf[cur->key.value_off]); | |
2238 | ||
2239 | if (match && key->key.op == OP_NOMATCH) | |
2240 | goto try_parent; | |
2241 | if (!match && key->key.op == OP_MATCH) | |
2242 | goto try_parent; | |
2243 | break; | |
2244 | } | |
38932b9f | 2245 | default: |
6880b25d | 2246 | goto nomatch; |
6880b25d | 2247 | } |
38932b9f | 2248 | dbg(event->udev, "parent key matched\n"); |
065db052 | 2249 | } |
38932b9f | 2250 | dbg(event->udev, "all parent keys matched\n"); |
6880b25d | 2251 | break; |
38932b9f KS |
2252 | |
2253 | try_parent: | |
2254 | event->dev_parent = udev_device_get_parent(event->dev_parent); | |
2255 | if (event->dev_parent == NULL) | |
2256 | goto nomatch; | |
2257 | } | |
2258 | /* move behind our sequence of parent match keys */ | |
2259 | cur = next; | |
2260 | continue; | |
2261 | } | |
2262 | case TK_M_TEST: { | |
2263 | char filename[UTIL_PATH_SIZE]; | |
2264 | struct stat statbuf; | |
2265 | int match; | |
2266 | ||
2267 | udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename)); | |
2268 | if (util_resolve_subsys_kernel(event->udev, filename, filename, sizeof(filename), 0) != 0) { | |
2269 | if (filename[0] != '/') { | |
2270 | char tmp[UTIL_PATH_SIZE]; | |
2271 | ||
2272 | util_strscpy(tmp, sizeof(tmp), filename); | |
2273 | util_strscpyl(filename, sizeof(filename), | |
2274 | udev_device_get_syspath(event->dev), "/", tmp, NULL); | |
2275 | } | |
6880b25d | 2276 | } |
38932b9f KS |
2277 | attr_subst_subdir(filename, sizeof(filename)); |
2278 | ||
2279 | match = (stat(filename, &statbuf) == 0); | |
2280 | dbg(event->udev, "'%s' %s", filename, match ? "exists\n" : "does not exist\n"); | |
2281 | if (match && cur->key.mode > 0) { | |
2282 | match = ((statbuf.st_mode & cur->key.mode) > 0); | |
2283 | dbg(event->udev, "'%s' has mode=%#o and %s %#o\n", filename, statbuf.st_mode, | |
2284 | match ? "matches" : "does not match", cur->key.mode); | |
2285 | } | |
2286 | if (match && cur->key.op == OP_NOMATCH) | |
2287 | goto nomatch; | |
2288 | if (!match && cur->key.op == OP_MATCH) | |
2289 | goto nomatch; | |
2290 | break; | |
2291 | } | |
2181d30a KS |
2292 | case TK_M_EVENT_TIMEOUT: |
2293 | info(event->udev, "OPTIONS event_timeout=%u\n", cur->key.event_timeout); | |
2294 | event->timeout_usec = cur->key.event_timeout * 1000 * 1000; | |
2295 | break; | |
38932b9f KS |
2296 | case TK_M_PROGRAM: { |
2297 | char program[UTIL_PATH_SIZE]; | |
2298 | char **envp; | |
2299 | char result[UTIL_PATH_SIZE]; | |
2300 | ||
2301 | free(event->program_result); | |
2302 | event->program_result = NULL; | |
2303 | udev_event_apply_format(event, &rules->buf[cur->key.value_off], program, sizeof(program)); | |
2304 | envp = udev_device_get_properties_envp(event->dev); | |
2305 | info(event->udev, "PROGRAM '%s' %s:%u\n", | |
2306 | program, | |
2307 | &rules->buf[rule->rule.filename_off], | |
2308 | rule->rule.filename_line); | |
6880b25d | 2309 | |
38932b9f KS |
2310 | if (udev_event_spawn(event, program, envp, sigmask, result, sizeof(result)) < 0) { |
2311 | if (cur->key.op != OP_NOMATCH) | |
2312 | goto nomatch; | |
2313 | } else { | |
2314 | int count; | |
2315 | ||
2316 | util_remove_trailing_chars(result, '\n'); | |
2317 | if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) { | |
2318 | count = udev_util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT); | |
2319 | if (count > 0) | |
2320 | info(event->udev, "%i character(s) replaced\n" , count); | |
6880b25d | 2321 | } |
38932b9f KS |
2322 | event->program_result = strdup(result); |
2323 | dbg(event->udev, "storing result '%s'\n", event->program_result); | |
2324 | if (cur->key.op == OP_NOMATCH) | |
2325 | goto nomatch; | |
6880b25d | 2326 | } |
38932b9f KS |
2327 | break; |
2328 | } | |
2329 | case TK_M_IMPORT_FILE: { | |
2330 | char import[UTIL_PATH_SIZE]; | |
6880b25d | 2331 | |
38932b9f KS |
2332 | udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import)); |
2333 | if (import_file_into_properties(event->dev, import) != 0) | |
2334 | if (cur->key.op != OP_NOMATCH) | |
2335 | goto nomatch; | |
2336 | break; | |
2337 | } | |
2338 | case TK_M_IMPORT_PROG: { | |
2339 | char import[UTIL_PATH_SIZE]; | |
5539f624 | 2340 | |
38932b9f KS |
2341 | udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import)); |
2342 | info(event->udev, "IMPORT '%s' %s:%u\n", | |
2343 | import, | |
2344 | &rules->buf[rule->rule.filename_off], | |
2345 | rule->rule.filename_line); | |
5539f624 | 2346 | |
38932b9f KS |
2347 | if (import_program_into_properties(event, import, sigmask) != 0) |
2348 | if (cur->key.op != OP_NOMATCH) | |
2349 | goto nomatch; | |
2350 | break; | |
2351 | } | |
2352 | case TK_M_IMPORT_DB: { | |
2353 | const char *key = &rules->buf[cur->key.value_off]; | |
2354 | const char *value; | |
2355 | ||
2356 | value = udev_device_get_property_value(event->dev_db, key); | |
2357 | if (value != NULL) { | |
2358 | struct udev_list_entry *entry; | |
c4f6dcc4 | 2359 | |
38932b9f KS |
2360 | entry = udev_device_add_property(event->dev, key, value); |
2361 | udev_list_entry_set_num(entry, true); | |
2362 | } else { | |
2363 | if (cur->key.op != OP_NOMATCH) | |
2364 | goto nomatch; | |
2365 | } | |
2366 | break; | |
2367 | } | |
2368 | case TK_M_IMPORT_CMDLINE: { | |
2369 | FILE *f; | |
2370 | bool imported = false; | |
2371 | ||
2372 | f = fopen("/proc/cmdline", "r"); | |
2373 | if (f != NULL) { | |
2374 | char cmdline[4096]; | |
2375 | ||
2376 | if (fgets(cmdline, sizeof(cmdline), f) != NULL) { | |
2377 | const char *key = &rules->buf[cur->key.value_off]; | |
2378 | char *pos; | |
2379 | ||
2380 | pos = strstr(cmdline, key); | |
2381 | if (pos != NULL) { | |
2382 | struct udev_list_entry *entry; | |
2383 | ||
2384 | pos += strlen(key); | |
2385 | if (pos[0] == '\0' || isspace(pos[0])) { | |
2386 | /* we import simple flags as 'FLAG=1' */ | |
2387 | entry = udev_device_add_property(event->dev, key, "1"); | |
2388 | udev_list_entry_set_num(entry, true); | |
2389 | imported = true; | |
2390 | } else if (pos[0] == '=') { | |
2391 | const char *value; | |
2392 | ||
2393 | pos++; | |
2394 | value = pos; | |
2395 | while (pos[0] != '\0' && !isspace(pos[0])) | |
7d2b68b7 | 2396 | pos++; |
38932b9f KS |
2397 | pos[0] = '\0'; |
2398 | entry = udev_device_add_property(event->dev, key, value); | |
2399 | udev_list_entry_set_num(entry, true); | |
2400 | imported = true; | |
c4f6dcc4 KS |
2401 | } |
2402 | } | |
c4f6dcc4 | 2403 | } |
38932b9f | 2404 | fclose(f); |
c4f6dcc4 | 2405 | } |
38932b9f KS |
2406 | if (!imported && cur->key.op != OP_NOMATCH) |
2407 | goto nomatch; | |
2408 | break; | |
2409 | } | |
2410 | case TK_M_IMPORT_PARENT: { | |
2411 | char import[UTIL_PATH_SIZE]; | |
6880b25d | 2412 | |
38932b9f KS |
2413 | udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import)); |
2414 | if (import_parent_into_properties(event->dev, import) != 0) | |
2415 | if (cur->key.op != OP_NOMATCH) | |
2416 | goto nomatch; | |
2417 | break; | |
2418 | } | |
6880b25d KS |
2419 | case TK_M_RESULT: |
2420 | if (match_key(rules, cur, event->program_result) != 0) | |
2421 | goto nomatch; | |
2422 | break; | |
6880b25d KS |
2423 | case TK_A_STRING_ESCAPE_NONE: |
2424 | esc = ESCAPE_NONE; | |
2425 | break; | |
2426 | case TK_A_STRING_ESCAPE_REPLACE: | |
2427 | esc = ESCAPE_REPLACE; | |
2428 | break; | |
9ead6627 KS |
2429 | case TK_A_DB_PERSIST: |
2430 | udev_device_set_db_persist(event->dev); | |
2431 | break; | |
bd284db1 | 2432 | case TK_A_INOTIFY_WATCH: |
3b529da4 KS |
2433 | if (event->inotify_watch_final) |
2434 | break; | |
2435 | if (cur->key.op == OP_ASSIGN_FINAL) | |
2436 | event->inotify_watch_final = true; | |
46f194cb | 2437 | event->inotify_watch = cur->key.watch; |
bd284db1 | 2438 | break; |
6880b25d KS |
2439 | case TK_A_DEVLINK_PRIO: |
2440 | udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio); | |
2441 | break; | |
38932b9f KS |
2442 | case TK_A_OWNER: { |
2443 | char owner[UTIL_NAME_SIZE]; | |
6880b25d | 2444 | |
38932b9f | 2445 | if (event->owner_final) |
6880b25d | 2446 | break; |
38932b9f KS |
2447 | if (cur->key.op == OP_ASSIGN_FINAL) |
2448 | event->owner_final = true; | |
2449 | udev_event_apply_format(event, &rules->buf[cur->key.value_off], owner, sizeof(owner)); | |
2450 | event->uid = util_lookup_user(event->udev, owner); | |
2451 | info(event->udev, "OWNER %u %s:%u\n", | |
2452 | event->uid, | |
2453 | &rules->buf[rule->rule.filename_off], | |
2454 | rule->rule.filename_line); | |
2455 | break; | |
2456 | } | |
2457 | case TK_A_GROUP: { | |
2458 | char group[UTIL_NAME_SIZE]; | |
6880b25d | 2459 | |
38932b9f | 2460 | if (event->group_final) |
6880b25d | 2461 | break; |
38932b9f KS |
2462 | if (cur->key.op == OP_ASSIGN_FINAL) |
2463 | event->group_final = true; | |
2464 | udev_event_apply_format(event, &rules->buf[cur->key.value_off], group, sizeof(group)); | |
2465 | event->gid = util_lookup_group(event->udev, group); | |
2466 | info(event->udev, "GROUP %u %s:%u\n", | |
2467 | event->gid, | |
2468 | &rules->buf[rule->rule.filename_off], | |
2469 | rule->rule.filename_line); | |
2470 | break; | |
2471 | } | |
2472 | case TK_A_MODE: { | |
2473 | char mode_str[UTIL_NAME_SIZE]; | |
2474 | mode_t mode; | |
2475 | char *endptr; | |
6880b25d | 2476 | |
38932b9f KS |
2477 | if (event->mode_final) |
2478 | break; | |
2479 | udev_event_apply_format(event, &rules->buf[cur->key.value_off], mode_str, sizeof(mode_str)); | |
2480 | mode = strtol(mode_str, &endptr, 8); | |
2481 | if (endptr[0] != '\0') { | |
2482 | err(event->udev, "ignoring invalid mode '%s'\n", mode_str); | |
6880b25d KS |
2483 | break; |
2484 | } | |
38932b9f KS |
2485 | if (cur->key.op == OP_ASSIGN_FINAL) |
2486 | event->mode_final = true; | |
2487 | event->mode_set = true; | |
2488 | event->mode = mode; | |
2489 | info(event->udev, "MODE %#o %s:%u\n", | |
2490 | event->mode, | |
2491 | &rules->buf[rule->rule.filename_off], | |
2492 | rule->rule.filename_line); | |
2493 | break; | |
2494 | } | |
6880b25d KS |
2495 | case TK_A_OWNER_ID: |
2496 | if (event->owner_final) | |
2497 | break; | |
b0f7409f | 2498 | if (cur->key.op == OP_ASSIGN_FINAL) |
761dfddc | 2499 | event->owner_final = true; |
6880b25d | 2500 | event->uid = cur->key.uid; |
0ef254d5 KS |
2501 | info(event->udev, "OWNER %u %s:%u\n", |
2502 | event->uid, | |
2503 | &rules->buf[rule->rule.filename_off], | |
2504 | rule->rule.filename_line); | |
6880b25d KS |
2505 | break; |
2506 | case TK_A_GROUP_ID: | |
2507 | if (event->group_final) | |
2508 | break; | |
b0f7409f | 2509 | if (cur->key.op == OP_ASSIGN_FINAL) |
761dfddc | 2510 | event->group_final = true; |
6880b25d | 2511 | event->gid = cur->key.gid; |
0ef254d5 KS |
2512 | info(event->udev, "GROUP %u %s:%u\n", |
2513 | event->gid, | |
2514 | &rules->buf[rule->rule.filename_off], | |
2515 | rule->rule.filename_line); | |
6880b25d KS |
2516 | break; |
2517 | case TK_A_MODE_ID: | |
2518 | if (event->mode_final) | |
2519 | break; | |
b0f7409f | 2520 | if (cur->key.op == OP_ASSIGN_FINAL) |
761dfddc | 2521 | event->mode_final = true; |
3cf1a8e3 | 2522 | event->mode_set = true; |
6880b25d | 2523 | event->mode = cur->key.mode; |
0ef254d5 KS |
2524 | info(event->udev, "MODE %#o %s:%u\n", |
2525 | event->mode, | |
2526 | &rules->buf[rule->rule.filename_off], | |
2527 | rule->rule.filename_line); | |
6880b25d | 2528 | break; |
761dfddc KS |
2529 | case TK_A_STATIC_NODE: |
2530 | break; | |
38932b9f KS |
2531 | case TK_A_ENV: { |
2532 | const char *name = &rules->buf[cur->key.attr_off]; | |
2533 | char *value = &rules->buf[cur->key.value_off]; | |
2534 | ||
2535 | if (value[0] != '\0') { | |
2536 | char temp_value[UTIL_NAME_SIZE]; | |
2537 | struct udev_list_entry *entry; | |
2538 | ||
2539 | udev_event_apply_format(event, value, temp_value, sizeof(temp_value)); | |
2540 | entry = udev_device_add_property(event->dev, name, temp_value); | |
2541 | /* store in db, skip private keys */ | |
2542 | if (name[0] != '.') | |
2543 | udev_list_entry_set_num(entry, true); | |
2544 | } else { | |
2545 | udev_device_add_property(event->dev, name, NULL); | |
6880b25d | 2546 | } |
38932b9f KS |
2547 | break; |
2548 | } | |
1eb037a7 KS |
2549 | case TK_A_TAG: { |
2550 | char tag[UTIL_PATH_SIZE]; | |
705a165d | 2551 | const char *p; |
1eb037a7 KS |
2552 | |
2553 | udev_event_apply_format(event, &rules->buf[cur->key.value_off], tag, sizeof(tag)); | |
1dbfbfbe KS |
2554 | if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL) |
2555 | udev_device_cleanup_tags_list(event->dev); | |
705a165d KS |
2556 | for (p = tag; *p != '\0'; p++) { |
2557 | if ((*p >= 'a' && *p <= 'z') || | |
2558 | (*p >= 'A' && *p <= 'Z') || | |
2559 | (*p >= '0' && *p <= '9') || | |
2560 | *p == '-' || *p == '_') | |
2561 | continue; | |
2562 | err(event->udev, "ignoring invalid tag name '%s'\n", tag); | |
2563 | break; | |
2564 | } | |
1eb037a7 | 2565 | udev_device_add_tag(event->dev, tag); |
28460195 | 2566 | break; |
1eb037a7 | 2567 | } |
38932b9f KS |
2568 | case TK_A_NAME: { |
2569 | const char *name = &rules->buf[cur->key.value_off]; | |
2570 | char name_str[UTIL_PATH_SIZE]; | |
2571 | int count; | |
6880b25d | 2572 | |
38932b9f | 2573 | if (event->name_final) |
6880b25d | 2574 | break; |
38932b9f KS |
2575 | if (cur->key.op == OP_ASSIGN_FINAL) |
2576 | event->name_final = true; | |
2577 | udev_event_apply_format(event, name, name_str, sizeof(name_str)); | |
2578 | if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) { | |
2579 | count = udev_util_replace_chars(name_str, "/"); | |
6880b25d | 2580 | if (count > 0) |
38932b9f | 2581 | info(event->udev, "%i character(s) replaced\n", count); |
6880b25d | 2582 | } |
38932b9f KS |
2583 | free(event->name); |
2584 | event->name = strdup(name_str); | |
2585 | info(event->udev, "NAME '%s' %s:%u\n", | |
2586 | event->name, | |
2587 | &rules->buf[rule->rule.filename_off], | |
2588 | rule->rule.filename_line); | |
6880b25d | 2589 | break; |
38932b9f KS |
2590 | } |
2591 | case TK_A_DEVLINK: { | |
2592 | char temp[UTIL_PATH_SIZE]; | |
2593 | char filename[UTIL_PATH_SIZE]; | |
2594 | char *pos, *next; | |
2595 | int count = 0; | |
2596 | ||
2597 | if (event->devlink_final) | |
6880b25d | 2598 | break; |
38932b9f | 2599 | if (major(udev_device_get_devnum(event->dev)) == 0) |
6880b25d | 2600 | break; |
38932b9f KS |
2601 | if (cur->key.op == OP_ASSIGN_FINAL) |
2602 | event->devlink_final = true; | |
2603 | if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL) | |
2604 | udev_device_cleanup_devlinks_list(event->dev); | |
2605 | ||
2606 | /* allow multiple symlinks separated by spaces */ | |
2607 | udev_event_apply_format(event, &rules->buf[cur->key.value_off], temp, sizeof(temp)); | |
2608 | if (esc == ESCAPE_UNSET) | |
2609 | count = udev_util_replace_chars(temp, "/ "); | |
2610 | else if (esc == ESCAPE_REPLACE) | |
2611 | count = udev_util_replace_chars(temp, "/"); | |
2612 | if (count > 0) | |
2613 | info(event->udev, "%i character(s) replaced\n" , count); | |
2614 | dbg(event->udev, "rule applied, added symlink(s) '%s'\n", temp); | |
2615 | pos = temp; | |
2616 | while (isspace(pos[0])) | |
2617 | pos++; | |
2618 | next = strchr(pos, ' '); | |
2619 | while (next != NULL) { | |
2620 | next[0] = '\0'; | |
2621 | info(event->udev, "LINK '%s' %s:%u\n", pos, | |
2622 | &rules->buf[rule->rule.filename_off], rule->rule.filename_line); | |
2623 | util_strscpyl(filename, sizeof(filename), udev_get_dev_path(event->udev), "/", pos, NULL); | |
2624 | udev_device_add_devlink(event->dev, filename, cur->key.devlink_unique); | |
2625 | while (isspace(next[1])) | |
2626 | next++; | |
2627 | pos = &next[1]; | |
2628 | next = strchr(pos, ' '); | |
2629 | } | |
2630 | if (pos[0] != '\0') { | |
2631 | info(event->udev, "LINK '%s' %s:%u\n", pos, | |
2632 | &rules->buf[rule->rule.filename_off], rule->rule.filename_line); | |
2633 | util_strscpyl(filename, sizeof(filename), udev_get_dev_path(event->udev), "/", pos, NULL); | |
2634 | udev_device_add_devlink(event->dev, filename, cur->key.devlink_unique); | |
2635 | } | |
2636 | break; | |
2637 | } | |
2638 | case TK_A_ATTR: { | |
2639 | const char *key_name = &rules->buf[cur->key.attr_off]; | |
2640 | char attr[UTIL_PATH_SIZE]; | |
2641 | char value[UTIL_NAME_SIZE]; | |
2642 | FILE *f; | |
2643 | ||
2644 | if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0) | |
2645 | util_strscpyl(attr, sizeof(attr), udev_device_get_syspath(event->dev), "/", key_name, NULL); | |
2646 | attr_subst_subdir(attr, sizeof(attr)); | |
2647 | ||
2648 | udev_event_apply_format(event, &rules->buf[cur->key.value_off], value, sizeof(value)); | |
2649 | info(event->udev, "ATTR '%s' writing '%s' %s:%u\n", attr, value, | |
2650 | &rules->buf[rule->rule.filename_off], | |
2651 | rule->rule.filename_line); | |
2652 | f = fopen(attr, "w"); | |
2653 | if (f != NULL) { | |
2654 | if (fprintf(f, "%s", value) <= 0) | |
2655 | err(event->udev, "error writing ATTR{%s}: %m\n", attr); | |
2656 | fclose(f); | |
2657 | } else { | |
2658 | err(event->udev, "error opening ATTR{%s} for writing: %m\n", attr); | |
6880b25d | 2659 | } |
38932b9f KS |
2660 | break; |
2661 | } | |
2662 | case TK_A_RUN: { | |
2663 | struct udev_list_entry *list_entry; | |
2664 | ||
2665 | if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL) | |
2666 | udev_list_cleanup_entries(event->udev, &event->run_list); | |
2667 | info(event->udev, "RUN '%s' %s:%u\n", | |
2668 | &rules->buf[cur->key.value_off], | |
2669 | &rules->buf[rule->rule.filename_off], | |
2670 | rule->rule.filename_line); | |
2671 | list_entry = udev_list_entry_add(event->udev, &event->run_list, | |
2672 | &rules->buf[cur->key.value_off], NULL, UDEV_LIST_UNIQUE); | |
2673 | if (cur->key.fail_on_error) | |
2674 | udev_list_entry_set_num(list_entry, true); | |
2675 | break; | |
2676 | } | |
6880b25d | 2677 | case TK_A_GOTO: |
0c377989 KS |
2678 | if (cur->key.rule_goto == 0) |
2679 | break; | |
6880b25d KS |
2680 | cur = &rules->tokens[cur->key.rule_goto]; |
2681 | continue; | |
6270756c | 2682 | case TK_END: |
11ae7578 | 2683 | return 0; |
6880b25d | 2684 | |
d15fcce4 | 2685 | case TK_M_PARENTS_MIN: |
b0f7409f | 2686 | case TK_M_PARENTS_MAX: |
ac218d9c | 2687 | case TK_M_MAX: |
ac218d9c | 2688 | case TK_UNSET: |
6880b25d KS |
2689 | err(rules->udev, "wrong type %u\n", cur->type); |
2690 | goto nomatch; | |
2691 | } | |
2692 | ||
2693 | cur++; | |
2694 | continue; | |
2695 | nomatch: | |
2696 | /* fast-forward to next rule */ | |
3f3aa9f5 AJ |
2697 | cur = rule + rule->rule.token_count; |
2698 | dbg(rules->udev, "forward to rule: %u\n", | |
2699 | (unsigned int) (cur - rules->tokens)); | |
6880b25d | 2700 | } |
6880b25d | 2701 | } |
761dfddc KS |
2702 | |
2703 | void udev_rules_apply_static_dev_perms(struct udev_rules *rules) | |
2704 | { | |
2705 | struct token *cur; | |
2706 | struct token *rule; | |
2707 | uid_t uid = 0; | |
2708 | gid_t gid = 0; | |
2709 | mode_t mode = 0; | |
2710 | ||
2711 | if (rules->tokens == NULL) | |
2712 | return; | |
2713 | ||
2714 | cur = &rules->tokens[0]; | |
2715 | rule = cur; | |
2716 | for (;;) { | |
2717 | switch (cur->type) { | |
2718 | case TK_RULE: | |
2719 | /* current rule */ | |
2720 | rule = cur; | |
2721 | ||
2722 | /* skip rules without a static_node tag */ | |
2723 | if (!rule->rule.has_static_node) | |
2724 | goto next; | |
2725 | ||
2726 | uid = 0; | |
2727 | gid = 0; | |
2728 | mode = 0; | |
2729 | break; | |
2730 | case TK_A_OWNER_ID: | |
2731 | uid = cur->key.uid; | |
2732 | break; | |
2733 | case TK_A_GROUP_ID: | |
2734 | gid = cur->key.gid; | |
2735 | break; | |
2736 | case TK_A_MODE_ID: | |
2737 | mode = cur->key.mode; | |
2738 | break; | |
2739 | case TK_A_STATIC_NODE: { | |
2740 | char filename[UTIL_PATH_SIZE]; | |
2741 | struct stat stats; | |
c112873b | 2742 | |
761dfddc | 2743 | /* we assure, that the permissions tokens are sorted before the static token */ |
36acdbcc | 2744 | if (mode == 0 && uid == 0 && gid == 0) |
761dfddc KS |
2745 | goto next; |
2746 | util_strscpyl(filename, sizeof(filename), udev_get_dev_path(rules->udev), "/", | |
2747 | &rules->buf[cur->key.value_off], NULL); | |
2748 | if (stat(filename, &stats) != 0) | |
2749 | goto next; | |
2750 | if (!S_ISBLK(stats.st_mode) && !S_ISCHR(stats.st_mode)) | |
2751 | goto next; | |
c112873b KS |
2752 | |
2753 | if (mode == 0 && gid > 0) | |
2754 | mode = 0660; | |
2755 | if (mode != (stats.st_mode & 0777)) { | |
761dfddc KS |
2756 | chmod(filename, mode); |
2757 | info(rules->udev, "chmod '%s' %#o\n", filename, mode); | |
2758 | } | |
c112873b | 2759 | |
761dfddc KS |
2760 | if ((uid != 0 && uid != stats.st_uid) || (gid != 0 && gid != stats.st_gid)) { |
2761 | chown(filename, uid, gid); | |
2762 | info(rules->udev, "chown '%s' %u %u\n", filename, uid, gid); | |
2763 | } | |
c112873b | 2764 | |
761dfddc KS |
2765 | utimensat(AT_FDCWD, filename, NULL, 0); |
2766 | break; | |
2767 | } | |
2768 | case TK_END: | |
2769 | return; | |
2770 | } | |
2771 | ||
2772 | cur++; | |
2773 | continue; | |
2774 | next: | |
2775 | /* fast-forward to next rule */ | |
2776 | cur = rule + rule->rule.token_count; | |
2777 | continue; | |
2778 | } | |
2779 | } |