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Commit | Line | Data |
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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 */ | |
d7867b31 | 147 | TK_M_IMPORT_BUILTIN, /* val */ |
5539f624 | 148 | TK_M_IMPORT_DB, /* val */ |
c4f6dcc4 | 149 | TK_M_IMPORT_CMDLINE, /* val */ |
6880b25d KS |
150 | TK_M_IMPORT_PARENT, /* val */ |
151 | TK_M_RESULT, /* val */ | |
ac218d9c | 152 | TK_M_MAX, |
6880b25d | 153 | |
6880b25d KS |
154 | TK_A_STRING_ESCAPE_NONE, |
155 | TK_A_STRING_ESCAPE_REPLACE, | |
9ead6627 | 156 | TK_A_DB_PERSIST, |
46f194cb | 157 | TK_A_INOTIFY_WATCH, /* int */ |
6880b25d KS |
158 | TK_A_DEVLINK_PRIO, /* int */ |
159 | TK_A_OWNER, /* val */ | |
160 | TK_A_GROUP, /* val */ | |
161 | TK_A_MODE, /* val */ | |
162 | TK_A_OWNER_ID, /* uid_t */ | |
163 | TK_A_GROUP_ID, /* gid_t */ | |
164 | TK_A_MODE_ID, /* mode_t */ | |
761dfddc | 165 | TK_A_STATIC_NODE, /* val */ |
6880b25d | 166 | TK_A_ENV, /* val, attr */ |
28460195 | 167 | TK_A_TAG, /* val */ |
6880b25d KS |
168 | TK_A_NAME, /* val */ |
169 | TK_A_DEVLINK, /* val */ | |
6880b25d KS |
170 | TK_A_ATTR, /* val, attr */ |
171 | TK_A_RUN, /* val, bool */ | |
172 | TK_A_GOTO, /* size_t */ | |
6880b25d KS |
173 | |
174 | TK_END, | |
c7521974 KS |
175 | }; |
176 | ||
3f3aa9f5 | 177 | /* we try to pack stuff in a way that we take only 12 bytes per token */ |
4052400f KS |
178 | struct token { |
179 | union { | |
761dfddc | 180 | unsigned char type; /* same in rule and key */ |
4052400f | 181 | struct { |
a25d547d | 182 | enum token_type type:8; |
761dfddc KS |
183 | bool can_set_name:1; |
184 | bool has_static_node:1; | |
185 | unsigned int unused:6; | |
3f3aa9f5 | 186 | unsigned short token_count; |
4052400f KS |
187 | unsigned int label_off; |
188 | unsigned short filename_off; | |
189 | unsigned short filename_line; | |
190 | } rule; | |
191 | struct { | |
a25d547d KS |
192 | enum token_type type:8; |
193 | enum operation_type op:8; | |
194 | enum string_glob_type glob:8; | |
32028733 KS |
195 | enum string_subst_type subst:4; |
196 | enum string_subst_type attrsubst:4; | |
4052400f KS |
197 | unsigned int value_off; |
198 | union { | |
199 | unsigned int attr_off; | |
6c29f2b9 | 200 | int devlink_unique; |
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; |
d7867b31 | 208 | enum udev_builtin_cmd builtin_cmd; |
4052400f KS |
209 | }; |
210 | } key; | |
211 | }; | |
212 | }; | |
213 | ||
214 | #define MAX_TK 64 | |
215 | struct rule_tmp { | |
216 | struct udev_rules *rules; | |
217 | struct token rule; | |
218 | struct token token[MAX_TK]; | |
219 | unsigned int token_cur; | |
220 | }; | |
221 | ||
045a3bc8 | 222 | #ifdef ENABLE_DEBUG |
5d6a1fa6 KS |
223 | static const char *operation_str(enum operation_type type) |
224 | { | |
225 | static const char *operation_strs[] = { | |
226 | [OP_UNSET] = "UNSET", | |
227 | [OP_MATCH] = "match", | |
228 | [OP_NOMATCH] = "nomatch", | |
229 | [OP_MATCH_MAX] = "MATCH_MAX", | |
230 | ||
231 | [OP_ADD] = "add", | |
232 | [OP_ASSIGN] = "assign", | |
233 | [OP_ASSIGN_FINAL] = "assign-final", | |
234 | } ; | |
235 | ||
236 | return operation_strs[type]; | |
237 | } | |
4052400f | 238 | |
5d6a1fa6 KS |
239 | static const char *string_glob_str(enum string_glob_type type) |
240 | { | |
241 | static const char *string_glob_strs[] = { | |
242 | [GL_UNSET] = "UNSET", | |
243 | [GL_PLAIN] = "plain", | |
244 | [GL_GLOB] = "glob", | |
245 | [GL_SPLIT] = "split", | |
246 | [GL_SPLIT_GLOB] = "split-glob", | |
247 | [GL_SOMETHING] = "split-glob", | |
5d6a1fa6 | 248 | }; |
4052400f | 249 | |
5d6a1fa6 KS |
250 | return string_glob_strs[type]; |
251 | } | |
252 | ||
253 | static const char *token_str(enum token_type type) | |
254 | { | |
255 | static const char *token_strs[] = { | |
256 | [TK_UNSET] = "UNSET", | |
257 | [TK_RULE] = "RULE", | |
258 | ||
259 | [TK_M_ACTION] = "M ACTION", | |
260 | [TK_M_DEVPATH] = "M DEVPATH", | |
261 | [TK_M_KERNEL] = "M KERNEL", | |
262 | [TK_M_DEVLINK] = "M DEVLINK", | |
263 | [TK_M_NAME] = "M NAME", | |
264 | [TK_M_ENV] = "M ENV", | |
3f896a2a | 265 | [TK_M_TAG] = "M TAG", |
5d6a1fa6 KS |
266 | [TK_M_SUBSYSTEM] = "M SUBSYSTEM", |
267 | [TK_M_DRIVER] = "M DRIVER", | |
268 | [TK_M_WAITFOR] = "M WAITFOR", | |
269 | [TK_M_ATTR] = "M ATTR", | |
270 | ||
271 | [TK_M_PARENTS_MIN] = "M PARENTS_MIN", | |
272 | [TK_M_KERNELS] = "M KERNELS", | |
273 | [TK_M_SUBSYSTEMS] = "M SUBSYSTEMS", | |
274 | [TK_M_DRIVERS] = "M DRIVERS", | |
275 | [TK_M_ATTRS] = "M ATTRS", | |
7df0ed83 | 276 | [TK_M_TAGS] = "M TAGS", |
5d6a1fa6 KS |
277 | [TK_M_PARENTS_MAX] = "M PARENTS_MAX", |
278 | ||
279 | [TK_M_TEST] = "M TEST", | |
2181d30a | 280 | [TK_M_EVENT_TIMEOUT] = "M EVENT_TIMEOUT", |
5d6a1fa6 KS |
281 | [TK_M_PROGRAM] = "M PROGRAM", |
282 | [TK_M_IMPORT_FILE] = "M IMPORT_FILE", | |
283 | [TK_M_IMPORT_PROG] = "M IMPORT_PROG", | |
d7867b31 | 284 | [TK_M_IMPORT_BUILTIN] = "M IMPORT_BUILTIN", |
5539f624 | 285 | [TK_M_IMPORT_DB] = "M IMPORT_DB", |
c4f6dcc4 | 286 | [TK_M_IMPORT_CMDLINE] = "M IMPORT_CMDLINE", |
214a6c79 | 287 | [TK_M_IMPORT_PARENT] = "M IMPORT_PARENT", |
5d6a1fa6 KS |
288 | [TK_M_RESULT] = "M RESULT", |
289 | [TK_M_MAX] = "M MAX", | |
290 | ||
5d6a1fa6 KS |
291 | [TK_A_STRING_ESCAPE_NONE] = "A STRING_ESCAPE_NONE", |
292 | [TK_A_STRING_ESCAPE_REPLACE] = "A STRING_ESCAPE_REPLACE", | |
9ead6627 | 293 | [TK_A_DB_PERSIST] = "A DB_PERSIST", |
bd284db1 | 294 | [TK_A_INOTIFY_WATCH] = "A INOTIFY_WATCH", |
5d6a1fa6 KS |
295 | [TK_A_DEVLINK_PRIO] = "A DEVLINK_PRIO", |
296 | [TK_A_OWNER] = "A OWNER", | |
297 | [TK_A_GROUP] = "A GROUP", | |
298 | [TK_A_MODE] = "A MODE", | |
299 | [TK_A_OWNER_ID] = "A OWNER_ID", | |
300 | [TK_A_GROUP_ID] = "A GROUP_ID", | |
761dfddc | 301 | [TK_A_STATIC_NODE] = "A STATIC_NODE", |
5d6a1fa6 KS |
302 | [TK_A_MODE_ID] = "A MODE_ID", |
303 | [TK_A_ENV] = "A ENV", | |
28460195 | 304 | [TK_A_TAG] = "A ENV", |
5d6a1fa6 KS |
305 | [TK_A_NAME] = "A NAME", |
306 | [TK_A_DEVLINK] = "A DEVLINK", | |
5d6a1fa6 KS |
307 | [TK_A_ATTR] = "A ATTR", |
308 | [TK_A_RUN] = "A RUN", | |
309 | [TK_A_GOTO] = "A GOTO", | |
5d6a1fa6 KS |
310 | |
311 | [TK_END] = "END", | |
312 | }; | |
313 | ||
314 | return token_strs[type]; | |
315 | } | |
c7521974 | 316 | |
4052400f KS |
317 | static void dump_token(struct udev_rules *rules, struct token *token) |
318 | { | |
319 | enum token_type type = token->type; | |
320 | enum operation_type op = token->key.op; | |
321 | enum string_glob_type glob = token->key.glob; | |
322 | const char *value = &rules->buf[token->key.value_off]; | |
323 | const char *attr = &rules->buf[token->key.attr_off]; | |
154a7b84 | 324 | |
4052400f KS |
325 | switch (type) { |
326 | case TK_RULE: | |
327 | { | |
328 | const char *tks_ptr = (char *)rules->tokens; | |
329 | const char *tk_ptr = (char *)token; | |
5d6a1fa6 | 330 | unsigned int idx = (tk_ptr - tks_ptr) / sizeof(struct token); |
154a7b84 | 331 | |
d80f8ffd | 332 | dbg(rules->udev, "* RULE %s:%u, token: %u, count: %u, label: '%s'\n", |
4052400f | 333 | &rules->buf[token->rule.filename_off], token->rule.filename_line, |
5d6a1fa6 | 334 | idx, token->rule.token_count, |
d80f8ffd | 335 | &rules->buf[token->rule.label_off]); |
4052400f KS |
336 | break; |
337 | } | |
338 | case TK_M_ACTION: | |
339 | case TK_M_DEVPATH: | |
340 | case TK_M_KERNEL: | |
341 | case TK_M_SUBSYSTEM: | |
342 | case TK_M_DRIVER: | |
343 | case TK_M_WAITFOR: | |
344 | case TK_M_DEVLINK: | |
345 | case TK_M_NAME: | |
346 | case TK_M_KERNELS: | |
347 | case TK_M_SUBSYSTEMS: | |
348 | case TK_M_DRIVERS: | |
7df0ed83 | 349 | case TK_M_TAGS: |
4052400f KS |
350 | case TK_M_PROGRAM: |
351 | case TK_M_IMPORT_FILE: | |
352 | case TK_M_IMPORT_PROG: | |
5539f624 | 353 | case TK_M_IMPORT_DB: |
c4f6dcc4 | 354 | case TK_M_IMPORT_CMDLINE: |
4052400f KS |
355 | case TK_M_IMPORT_PARENT: |
356 | case TK_M_RESULT: | |
357 | case TK_A_NAME: | |
358 | case TK_A_DEVLINK: | |
359 | case TK_A_OWNER: | |
360 | case TK_A_GROUP: | |
361 | case TK_A_MODE: | |
362 | case TK_A_RUN: | |
363 | dbg(rules->udev, "%s %s '%s'(%s)\n", | |
5d6a1fa6 | 364 | token_str(type), operation_str(op), value, string_glob_str(glob)); |
4052400f | 365 | break; |
d7867b31 | 366 | case TK_M_IMPORT_BUILTIN: |
81dadce5 | 367 | dbg(rules->udev, "%s %i '%s'\n", token_str(type), token->key.builtin_cmd, value); |
d7867b31 | 368 | break; |
4052400f KS |
369 | case TK_M_ATTR: |
370 | case TK_M_ATTRS: | |
371 | case TK_M_ENV: | |
372 | case TK_A_ATTR: | |
373 | case TK_A_ENV: | |
374 | dbg(rules->udev, "%s %s '%s' '%s'(%s)\n", | |
5d6a1fa6 | 375 | token_str(type), operation_str(op), attr, value, string_glob_str(glob)); |
4052400f | 376 | break; |
3f896a2a | 377 | case TK_M_TAG: |
28460195 KS |
378 | case TK_A_TAG: |
379 | dbg(rules->udev, "%s %s '%s'\n", token_str(type), operation_str(op), value); | |
380 | break; | |
4052400f KS |
381 | case TK_A_STRING_ESCAPE_NONE: |
382 | case TK_A_STRING_ESCAPE_REPLACE: | |
9ead6627 | 383 | case TK_A_DB_PERSIST: |
5d69a34c KS |
384 | dbg(rules->udev, "%s\n", token_str(type)); |
385 | break; | |
4052400f KS |
386 | case TK_M_TEST: |
387 | dbg(rules->udev, "%s %s '%s'(%s) %#o\n", | |
5d6a1fa6 | 388 | token_str(type), operation_str(op), value, string_glob_str(glob), token->key.mode); |
4052400f | 389 | break; |
46f194cb | 390 | case TK_A_INOTIFY_WATCH: |
2236ddae | 391 | dbg(rules->udev, "%s %u\n", token_str(type), token->key.watch); |
46f194cb | 392 | break; |
4052400f | 393 | case TK_A_DEVLINK_PRIO: |
761dfddc | 394 | dbg(rules->udev, "%s %u\n", token_str(type), token->key.devlink_prio); |
4052400f KS |
395 | break; |
396 | case TK_A_OWNER_ID: | |
5d6a1fa6 | 397 | dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.uid); |
4052400f KS |
398 | break; |
399 | case TK_A_GROUP_ID: | |
5d6a1fa6 | 400 | dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.gid); |
4052400f KS |
401 | break; |
402 | case TK_A_MODE_ID: | |
5d6a1fa6 | 403 | dbg(rules->udev, "%s %s %#o\n", token_str(type), operation_str(op), token->key.mode); |
4052400f | 404 | break; |
761dfddc KS |
405 | case TK_A_STATIC_NODE: |
406 | dbg(rules->udev, "%s '%s'\n", token_str(type), value); | |
407 | break; | |
2181d30a | 408 | case TK_M_EVENT_TIMEOUT: |
761dfddc | 409 | dbg(rules->udev, "%s %u\n", token_str(type), token->key.event_timeout); |
4052400f KS |
410 | break; |
411 | case TK_A_GOTO: | |
5d6a1fa6 | 412 | dbg(rules->udev, "%s '%s' %u\n", token_str(type), value, token->key.rule_goto); |
4052400f KS |
413 | break; |
414 | case TK_END: | |
5d6a1fa6 | 415 | dbg(rules->udev, "* %s\n", token_str(type)); |
4052400f KS |
416 | break; |
417 | case TK_M_PARENTS_MIN: | |
418 | case TK_M_PARENTS_MAX: | |
419 | case TK_M_MAX: | |
420 | case TK_UNSET: | |
421 | dbg(rules->udev, "unknown type %u\n", type); | |
422 | break; | |
423 | } | |
424 | } | |
154a7b84 | 425 | |
4052400f KS |
426 | static void dump_rules(struct udev_rules *rules) |
427 | { | |
428 | unsigned int i; | |
154a7b84 | 429 | |
4052400f KS |
430 | dbg(rules->udev, "dumping %u (%zu bytes) tokens, %u (%zu bytes) strings\n", |
431 | rules->token_cur, | |
432 | rules->token_cur * sizeof(struct token), | |
433 | rules->buf_count, | |
434 | rules->buf_cur); | |
435 | for(i = 0; i < rules->token_cur; i++) | |
436 | dump_token(rules, &rules->tokens[i]); | |
437 | } | |
438 | #else | |
5d6a1fa6 KS |
439 | static inline const char *operation_str(enum operation_type type) { return NULL; } |
440 | static inline const char *token_str(enum token_type type) { return NULL; } | |
4052400f KS |
441 | static inline void dump_token(struct udev_rules *rules, struct token *token) {} |
442 | static inline void dump_rules(struct udev_rules *rules) {} | |
045a3bc8 | 443 | #endif /* ENABLE_DEBUG */ |
c7521974 | 444 | |
1449a55d | 445 | static int add_new_string(struct udev_rules *rules, const char *str, size_t bytes) |
c7521974 | 446 | { |
6880b25d | 447 | int off; |
c7521974 | 448 | |
34d6a259 | 449 | /* grow buffer if needed */ |
1449a55d | 450 | if (rules->buf_cur + bytes+1 >= rules->buf_max) { |
6880b25d KS |
451 | char *buf; |
452 | unsigned int add; | |
c7521974 | 453 | |
6880b25d KS |
454 | /* double the buffer size */ |
455 | add = rules->buf_max; | |
1449a55d AJ |
456 | if (add < bytes * 8) |
457 | add = bytes * 8; | |
c7521974 | 458 | |
6880b25d KS |
459 | buf = realloc(rules->buf, rules->buf_max + add); |
460 | if (buf == NULL) | |
461 | return -1; | |
86b57788 | 462 | dbg(rules->udev, "extend buffer from %zu to %zu\n", rules->buf_max, rules->buf_max + add); |
6880b25d KS |
463 | rules->buf = buf; |
464 | rules->buf_max += add; | |
c7521974 | 465 | } |
6880b25d | 466 | off = rules->buf_cur; |
1449a55d AJ |
467 | memcpy(&rules->buf[rules->buf_cur], str, bytes); |
468 | rules->buf_cur += bytes; | |
6880b25d KS |
469 | rules->buf_count++; |
470 | return off; | |
c7521974 KS |
471 | } |
472 | ||
1449a55d | 473 | static int add_string(struct udev_rules *rules, const char *str) |
c7521974 | 474 | { |
bcf44d55 KS |
475 | unsigned int node_idx; |
476 | struct trie_node *new_node; | |
477 | unsigned int new_node_idx; | |
1449a55d | 478 | unsigned char key; |
bcf44d55 | 479 | unsigned short len; |
1c8af93a | 480 | unsigned int depth; |
1449a55d | 481 | unsigned int off; |
023ed7b0 | 482 | struct trie_node *parent; |
1449a55d | 483 | |
023ed7b0 | 484 | /* walk trie, start from last character of str to find matching tails */ |
949075db | 485 | len = strlen(str); |
023ed7b0 | 486 | key = str[len-1]; |
949075db | 487 | node_idx = 0; |
023ed7b0 KS |
488 | for (depth = 0; depth <= len; depth++) { |
489 | struct trie_node *node; | |
490 | unsigned int child_idx; | |
491 | ||
492 | node = &rules->trie_nodes[node_idx]; | |
493 | off = node->value_off + node->value_len - len; | |
494 | ||
495 | /* match against current node */ | |
496 | if (depth == len || (node->value_len >= len && memcmp(&rules->buf[off], str, len) == 0)) | |
497 | return off; | |
498 | ||
499 | /* lookup child node */ | |
500 | key = str[len - 1 - depth]; | |
501 | child_idx = node->child_idx; | |
502 | while (child_idx > 0) { | |
503 | struct trie_node *child; | |
504 | ||
505 | child = &rules->trie_nodes[child_idx]; | |
506 | if (child->key == key) | |
1449a55d | 507 | break; |
023ed7b0 | 508 | child_idx = child->next_child_idx; |
1449a55d | 509 | } |
023ed7b0 KS |
510 | if (child_idx == 0) |
511 | break; | |
512 | node_idx = child_idx; | |
1449a55d AJ |
513 | } |
514 | ||
515 | /* string not found, add it */ | |
516 | off = add_new_string(rules, str, len + 1); | |
517 | ||
bcf44d55 KS |
518 | /* grow trie nodes if needed */ |
519 | if (rules->trie_nodes_cur >= rules->trie_nodes_max) { | |
520 | struct trie_node *nodes; | |
521 | unsigned int add; | |
1449a55d AJ |
522 | |
523 | /* double the buffer size */ | |
bcf44d55 | 524 | add = rules->trie_nodes_max; |
1449a55d AJ |
525 | if (add < 8) |
526 | add = 8; | |
527 | ||
bcf44d55 KS |
528 | nodes = realloc(rules->trie_nodes, (rules->trie_nodes_max + add) * sizeof(struct trie_node)); |
529 | if (nodes == NULL) | |
1449a55d | 530 | return -1; |
bcf44d55 KS |
531 | dbg(rules->udev, "extend trie nodes from %u to %u\n", |
532 | rules->trie_nodes_max, rules->trie_nodes_max + add); | |
533 | rules->trie_nodes = nodes; | |
534 | rules->trie_nodes_max += add; | |
1449a55d AJ |
535 | } |
536 | ||
023ed7b0 | 537 | /* get a new node */ |
bcf44d55 KS |
538 | new_node_idx = rules->trie_nodes_cur; |
539 | rules->trie_nodes_cur++; | |
540 | new_node = &rules->trie_nodes[new_node_idx]; | |
023ed7b0 | 541 | memset(new_node, 0x00, sizeof(struct trie_node)); |
bcf44d55 KS |
542 | new_node->value_off = off; |
543 | new_node->value_len = len; | |
023ed7b0 | 544 | new_node->key = key; |
bcf44d55 | 545 | |
023ed7b0 KS |
546 | /* join the parent's child list */ |
547 | parent = &rules->trie_nodes[node_idx]; | |
548 | if (parent->child_idx == 0) { | |
549 | parent->child_idx = new_node_idx; | |
bcf44d55 | 550 | } else { |
023ed7b0 | 551 | struct trie_node *last_child; |
1449a55d | 552 | |
023ed7b0 KS |
553 | last_child = &rules->trie_nodes[parent->last_child_idx]; |
554 | last_child->next_child_idx = new_node_idx; | |
bcf44d55 | 555 | } |
023ed7b0 | 556 | parent->last_child_idx = new_node_idx; |
1449a55d AJ |
557 | return off; |
558 | } | |
559 | ||
560 | static int add_token(struct udev_rules *rules, struct token *token) | |
561 | { | |
34d6a259 | 562 | /* grow buffer if needed */ |
6880b25d KS |
563 | if (rules->token_cur+1 >= rules->token_max) { |
564 | struct token *tokens; | |
565 | unsigned int add; | |
c7521974 | 566 | |
6880b25d KS |
567 | /* double the buffer size */ |
568 | add = rules->token_max; | |
154a7b84 KS |
569 | if (add < 8) |
570 | add = 8; | |
c7521974 | 571 | |
6880b25d KS |
572 | tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token)); |
573 | if (tokens == NULL) | |
574 | return -1; | |
86b57788 | 575 | dbg(rules->udev, "extend tokens from %u to %u\n", rules->token_max, rules->token_max + add); |
6880b25d KS |
576 | rules->tokens = tokens; |
577 | rules->token_max += add; | |
c7521974 | 578 | } |
6880b25d KS |
579 | memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token)); |
580 | rules->token_cur++; | |
581 | return 0; | |
c7521974 | 582 | } |
a27cd06c | 583 | |
154a7b84 KS |
584 | static uid_t add_uid(struct udev_rules *rules, const char *owner) |
585 | { | |
586 | unsigned int i; | |
587 | uid_t uid; | |
588 | unsigned int off; | |
589 | ||
590 | /* lookup, if we know it already */ | |
591 | for (i = 0; i < rules->uids_cur; i++) { | |
592 | off = rules->uids[i].name_off; | |
593 | if (strcmp(&rules->buf[off], owner) == 0) { | |
594 | uid = rules->uids[i].uid; | |
595 | dbg(rules->udev, "return existing %u for '%s'\n", uid, owner); | |
596 | return uid; | |
597 | } | |
598 | } | |
599 | uid = util_lookup_user(rules->udev, owner); | |
600 | ||
601 | /* grow buffer if needed */ | |
602 | if (rules->uids_cur+1 >= rules->uids_max) { | |
603 | struct uid_gid *uids; | |
604 | unsigned int add; | |
605 | ||
606 | /* double the buffer size */ | |
607 | add = rules->uids_max; | |
608 | if (add < 1) | |
609 | add = 8; | |
610 | ||
611 | uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid)); | |
612 | if (uids == NULL) | |
613 | return uid; | |
86b57788 | 614 | dbg(rules->udev, "extend uids from %u to %u\n", rules->uids_max, rules->uids_max + add); |
154a7b84 KS |
615 | rules->uids = uids; |
616 | rules->uids_max += add; | |
617 | } | |
618 | rules->uids[rules->uids_cur].uid = uid; | |
619 | off = add_string(rules, owner); | |
620 | if (off <= 0) | |
621 | return uid; | |
622 | rules->uids[rules->uids_cur].name_off = off; | |
623 | rules->uids_cur++; | |
624 | return uid; | |
625 | } | |
626 | ||
627 | static gid_t add_gid(struct udev_rules *rules, const char *group) | |
628 | { | |
629 | unsigned int i; | |
630 | gid_t gid; | |
631 | unsigned int off; | |
632 | ||
633 | /* lookup, if we know it already */ | |
634 | for (i = 0; i < rules->gids_cur; i++) { | |
635 | off = rules->gids[i].name_off; | |
636 | if (strcmp(&rules->buf[off], group) == 0) { | |
637 | gid = rules->gids[i].gid; | |
ac218d9c | 638 | dbg(rules->udev, "return existing %u for '%s'\n", gid, group); |
154a7b84 KS |
639 | return gid; |
640 | } | |
641 | } | |
642 | gid = util_lookup_group(rules->udev, group); | |
643 | ||
644 | /* grow buffer if needed */ | |
645 | if (rules->gids_cur+1 >= rules->gids_max) { | |
646 | struct uid_gid *gids; | |
647 | unsigned int add; | |
648 | ||
649 | /* double the buffer size */ | |
650 | add = rules->gids_max; | |
651 | if (add < 1) | |
652 | add = 8; | |
653 | ||
654 | gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid)); | |
655 | if (gids == NULL) | |
656 | return gid; | |
86b57788 | 657 | dbg(rules->udev, "extend gids from %u to %u\n", rules->gids_max, rules->gids_max + add); |
154a7b84 KS |
658 | rules->gids = gids; |
659 | rules->gids_max += add; | |
660 | } | |
661 | rules->gids[rules->gids_cur].gid = gid; | |
662 | off = add_string(rules, group); | |
663 | if (off <= 0) | |
664 | return gid; | |
665 | rules->gids[rules->gids_cur].name_off = off; | |
666 | rules->gids_cur++; | |
667 | return gid; | |
668 | } | |
669 | ||
bb144ed1 | 670 | static int import_property_from_string(struct udev_device *dev, char *line) |
bd0ed2ff | 671 | { |
bb144ed1 KS |
672 | struct udev *udev = udev_device_get_udev(dev); |
673 | char *key; | |
674 | char *val; | |
675 | size_t len; | |
bd0ed2ff | 676 | |
bb144ed1 KS |
677 | /* find key */ |
678 | key = line; | |
679 | while (isspace(key[0])) | |
680 | key++; | |
bd0ed2ff | 681 | |
bb144ed1 KS |
682 | /* comment or empty line */ |
683 | if (key[0] == '#' || key[0] == '\0') | |
684 | return -1; | |
16511863 | 685 | |
bb144ed1 KS |
686 | /* split key/value */ |
687 | val = strchr(key, '='); | |
688 | if (val == NULL) | |
689 | return -1; | |
690 | val[0] = '\0'; | |
691 | val++; | |
aa8734ff | 692 | |
bb144ed1 KS |
693 | /* find value */ |
694 | while (isspace(val[0])) | |
695 | val++; | |
696 | ||
697 | /* terminate key */ | |
698 | len = strlen(key); | |
699 | if (len == 0) | |
700 | return -1; | |
701 | while (isspace(key[len-1])) | |
702 | len--; | |
703 | key[len] = '\0'; | |
704 | ||
705 | /* terminate value */ | |
706 | len = strlen(val); | |
707 | if (len == 0) | |
708 | return -1; | |
709 | while (isspace(val[len-1])) | |
710 | len--; | |
711 | val[len] = '\0'; | |
712 | ||
713 | if (len == 0) | |
714 | return -1; | |
715 | ||
716 | /* unquote */ | |
717 | if (val[0] == '"' || val[0] == '\'') { | |
718 | if (val[len-1] != val[0]) { | |
719 | info(udev, "inconsistent quoting: '%s', skip\n", line); | |
720 | return -1; | |
bd0ed2ff | 721 | } |
bb144ed1 KS |
722 | val[len-1] = '\0'; |
723 | val++; | |
724 | } | |
725 | ||
86b57788 | 726 | dbg(udev, "adding '%s'='%s'\n", key, val); |
bb144ed1 KS |
727 | |
728 | /* handle device, renamed by external tool, returning new path */ | |
729 | if (strcmp(key, "DEVPATH") == 0) { | |
730 | char syspath[UTIL_PATH_SIZE]; | |
731 | ||
732 | info(udev, "updating devpath from '%s' to '%s'\n", | |
733 | udev_device_get_devpath(dev), val); | |
065db052 | 734 | util_strscpyl(syspath, sizeof(syspath), udev_get_sys_path(udev), val, NULL); |
bb144ed1 KS |
735 | udev_device_set_syspath(dev, syspath); |
736 | } else { | |
737 | struct udev_list_entry *entry; | |
738 | ||
739 | entry = udev_device_add_property(dev, key, val); | |
b25a9454 KS |
740 | /* store in db, skip private keys */ |
741 | if (key[0] != '.') | |
8958da13 | 742 | udev_list_entry_set_num(entry, true); |
bd0ed2ff | 743 | } |
be4bedd1 KS |
744 | return 0; |
745 | } | |
746 | ||
6880b25d | 747 | static int import_file_into_properties(struct udev_device *dev, const char *filename) |
be4bedd1 | 748 | { |
bb144ed1 KS |
749 | FILE *f; |
750 | char line[UTIL_LINE_SIZE]; | |
be4bedd1 | 751 | |
bb144ed1 KS |
752 | f = fopen(filename, "r"); |
753 | if (f == NULL) | |
be4bedd1 | 754 | return -1; |
fc42bd5d | 755 | while (fgets(line, sizeof(line), f) != NULL) |
bb144ed1 KS |
756 | import_property_from_string(dev, line); |
757 | fclose(f); | |
be4bedd1 | 758 | return 0; |
bd0ed2ff KS |
759 | } |
760 | ||
2181d30a | 761 | static int import_program_into_properties(struct udev_event *event, const char *program, const sigset_t *sigmask) |
319c6700 | 762 | { |
2181d30a | 763 | struct udev_device *dev = event->dev; |
d0db192f | 764 | char **envp; |
851dd4dd | 765 | char result[UTIL_LINE_SIZE]; |
bb144ed1 | 766 | char *line; |
2181d30a | 767 | int err; |
319c6700 | 768 | |
d0db192f | 769 | envp = udev_device_get_properties_envp(dev); |
2181d30a KS |
770 | err = udev_event_spawn(event, program, envp, sigmask, result, sizeof(result)); |
771 | if (err < 0) | |
772 | return err; | |
bb144ed1 KS |
773 | |
774 | line = result; | |
775 | while (line != NULL) { | |
776 | char *pos; | |
777 | ||
778 | pos = strchr(line, '\n'); | |
779 | if (pos != NULL) { | |
780 | pos[0] = '\0'; | |
781 | pos = &pos[1]; | |
782 | } | |
783 | import_property_from_string(dev, line); | |
784 | line = pos; | |
785 | } | |
786 | return 0; | |
319c6700 KS |
787 | } |
788 | ||
6880b25d | 789 | static int import_parent_into_properties(struct udev_device *dev, const char *filter) |
0bfb84e1 | 790 | { |
bb144ed1 | 791 | struct udev *udev = udev_device_get_udev(dev); |
aa8734ff KS |
792 | struct udev_device *dev_parent; |
793 | struct udev_list_entry *list_entry; | |
0bfb84e1 | 794 | |
bb144ed1 | 795 | dev_parent = udev_device_get_parent(dev); |
aa8734ff KS |
796 | if (dev_parent == NULL) |
797 | return -1; | |
0bfb84e1 | 798 | |
bb144ed1 | 799 | dbg(udev, "found parent '%s', get the node name\n", udev_device_get_syspath(dev_parent)); |
aa8734ff KS |
800 | udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) { |
801 | const char *key = udev_list_entry_get_name(list_entry); | |
802 | const char *val = udev_list_entry_get_value(list_entry); | |
0bfb84e1 | 803 | |
aa8734ff KS |
804 | if (fnmatch(filter, key, 0) == 0) { |
805 | struct udev_list_entry *entry; | |
e2ecb34f | 806 | |
bb144ed1 KS |
807 | dbg(udev, "import key '%s=%s'\n", key, val); |
808 | entry = udev_device_add_property(dev, key, val); | |
b25a9454 KS |
809 | /* store in db, skip private keys */ |
810 | if (key[0] != '.') | |
8958da13 | 811 | udev_list_entry_set_num(entry, true); |
aa8734ff | 812 | } |
e2ecb34f | 813 | } |
aa8734ff | 814 | return 0; |
e2ecb34f KS |
815 | } |
816 | ||
c86be870 | 817 | #define WAIT_LOOP_PER_SECOND 50 |
6880b25d | 818 | static int wait_for_file(struct udev_device *dev, const char *file, int timeout) |
b2fe4b9a | 819 | { |
6880b25d | 820 | struct udev *udev = udev_device_get_udev(dev); |
17fcfb59 | 821 | char filepath[UTIL_PATH_SIZE]; |
1822e9b0 | 822 | char devicepath[UTIL_PATH_SIZE]; |
b2fe4b9a KS |
823 | struct stat stats; |
824 | int loop = timeout * WAIT_LOOP_PER_SECOND; | |
825 | ||
ea97dc37 | 826 | /* a relative path is a device attribute */ |
1822e9b0 | 827 | devicepath[0] = '\0'; |
ea97dc37 | 828 | if (file[0] != '/') { |
065db052 KS |
829 | util_strscpyl(devicepath, sizeof(devicepath), |
830 | udev_get_sys_path(udev), udev_device_get_devpath(dev), NULL); | |
831 | util_strscpyl(filepath, sizeof(filepath), devicepath, "/", file, NULL); | |
ea97dc37 KS |
832 | file = filepath; |
833 | } | |
834 | ||
6880b25d | 835 | dbg(udev, "will wait %i sec for '%s'\n", timeout, file); |
b2fe4b9a | 836 | while (--loop) { |
959e8b5d DM |
837 | const struct timespec duration = { 0, 1000 * 1000 * 1000 / WAIT_LOOP_PER_SECOND }; |
838 | ||
656ba91e | 839 | /* lookup file */ |
ea97dc37 | 840 | if (stat(file, &stats) == 0) { |
6880b25d | 841 | info(udev, "file '%s' appeared after %i loops\n", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1); |
b2fe4b9a KS |
842 | return 0; |
843 | } | |
eb5b8640 | 844 | /* make sure, the device did not disappear in the meantime */ |
ea97dc37 | 845 | if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) { |
6880b25d | 846 | info(udev, "device disappeared while waiting for '%s'\n", file); |
656ba91e KS |
847 | return -2; |
848 | } | |
6880b25d | 849 | info(udev, "wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND); |
959e8b5d | 850 | nanosleep(&duration, NULL); |
b2fe4b9a | 851 | } |
6880b25d | 852 | info(udev, "waiting for '%s' failed\n", file); |
b2fe4b9a KS |
853 | return -1; |
854 | } | |
855 | ||
0ea5e96e KS |
856 | static int attr_subst_subdir(char *attr, size_t len) |
857 | { | |
761dfddc | 858 | bool found = false; |
0ea5e96e | 859 | |
065db052 KS |
860 | if (strstr(attr, "/*/")) { |
861 | char *pos; | |
862 | char dirname[UTIL_PATH_SIZE]; | |
863 | const char *tail; | |
0ea5e96e KS |
864 | DIR *dir; |
865 | ||
065db052 KS |
866 | util_strscpy(dirname, sizeof(dirname), attr); |
867 | pos = strstr(dirname, "/*/"); | |
868 | if (pos == NULL) | |
869 | return -1; | |
870 | pos[0] = '\0'; | |
871 | tail = &pos[2]; | |
872 | dir = opendir(dirname); | |
0ea5e96e KS |
873 | if (dir != NULL) { |
874 | struct dirent *dent; | |
875 | ||
876 | for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) { | |
877 | struct stat stats; | |
878 | ||
879 | if (dent->d_name[0] == '.') | |
880 | continue; | |
065db052 | 881 | util_strscpyl(attr, len, dirname, "/", dent->d_name, tail, NULL); |
0ea5e96e | 882 | if (stat(attr, &stats) == 0) { |
761dfddc | 883 | found = true; |
0ea5e96e KS |
884 | break; |
885 | } | |
0ea5e96e KS |
886 | } |
887 | closedir(dir); | |
888 | } | |
0ea5e96e KS |
889 | } |
890 | ||
891 | return found; | |
892 | } | |
893 | ||
b0f7409f | 894 | static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value) |
a0e5382d | 895 | { |
6880b25d KS |
896 | char *linepos; |
897 | char *temp; | |
a0e5382d | 898 | |
6880b25d | 899 | linepos = *line; |
9257ecfc | 900 | if (linepos == NULL || linepos[0] == '\0') |
6880b25d | 901 | return -1; |
a0e5382d | 902 | |
6880b25d KS |
903 | /* skip whitespace */ |
904 | while (isspace(linepos[0]) || linepos[0] == ',') | |
905 | linepos++; | |
aa8734ff | 906 | |
6880b25d KS |
907 | /* get the key */ |
908 | if (linepos[0] == '\0') | |
909 | return -1; | |
910 | *key = linepos; | |
81313e1b | 911 | |
88cbfb09 | 912 | for (;;) { |
6880b25d KS |
913 | linepos++; |
914 | if (linepos[0] == '\0') | |
915 | return -1; | |
916 | if (isspace(linepos[0])) | |
81313e1b | 917 | break; |
6880b25d KS |
918 | if (linepos[0] == '=') |
919 | break; | |
920 | if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':')) | |
921 | if (linepos[1] == '=') | |
1ff1aa42 | 922 | break; |
953249a3 KS |
923 | } |
924 | ||
6880b25d KS |
925 | /* remember end of key */ |
926 | temp = linepos; | |
b2fe4b9a | 927 | |
6880b25d KS |
928 | /* skip whitespace after key */ |
929 | while (isspace(linepos[0])) | |
930 | linepos++; | |
931 | if (linepos[0] == '\0') | |
932 | return -1; | |
b2fe4b9a | 933 | |
6880b25d KS |
934 | /* get operation type */ |
935 | if (linepos[0] == '=' && linepos[1] == '=') { | |
b0f7409f | 936 | *op = OP_MATCH; |
6880b25d KS |
937 | linepos += 2; |
938 | } else if (linepos[0] == '!' && linepos[1] == '=') { | |
b0f7409f | 939 | *op = OP_NOMATCH; |
6880b25d KS |
940 | linepos += 2; |
941 | } else if (linepos[0] == '+' && linepos[1] == '=') { | |
b0f7409f | 942 | *op = OP_ADD; |
6880b25d KS |
943 | linepos += 2; |
944 | } else if (linepos[0] == '=') { | |
b0f7409f | 945 | *op = OP_ASSIGN; |
6880b25d KS |
946 | linepos++; |
947 | } else if (linepos[0] == ':' && linepos[1] == '=') { | |
b0f7409f | 948 | *op = OP_ASSIGN_FINAL; |
6880b25d KS |
949 | linepos += 2; |
950 | } else | |
951 | return -1; | |
d0c8cb7d | 952 | |
6880b25d KS |
953 | /* terminate key */ |
954 | temp[0] = '\0'; | |
95776dc6 | 955 | |
6880b25d KS |
956 | /* skip whitespace after operator */ |
957 | while (isspace(linepos[0])) | |
958 | linepos++; | |
959 | if (linepos[0] == '\0') | |
960 | return -1; | |
aa8734ff | 961 | |
ac218d9c | 962 | /* get the value */ |
6880b25d KS |
963 | if (linepos[0] == '"') |
964 | linepos++; | |
965 | else | |
966 | return -1; | |
967 | *value = linepos; | |
aa8734ff | 968 | |
ac218d9c | 969 | /* terminate */ |
6880b25d KS |
970 | temp = strchr(linepos, '"'); |
971 | if (!temp) | |
972 | return -1; | |
973 | temp[0] = '\0'; | |
974 | temp++; | |
5d6a1fa6 | 975 | dbg(udev, "%s '%s'-'%s'\n", operation_str(*op), *key, *value); |
aa8734ff | 976 | |
6880b25d KS |
977 | /* move line to next key */ |
978 | *line = temp; | |
979 | return 0; | |
980 | } | |
95776dc6 | 981 | |
6880b25d KS |
982 | /* extract possible KEY{attr} */ |
983 | static char *get_key_attribute(struct udev *udev, char *str) | |
984 | { | |
985 | char *pos; | |
986 | char *attr; | |
95776dc6 | 987 | |
6880b25d KS |
988 | attr = strchr(str, '{'); |
989 | if (attr != NULL) { | |
990 | attr++; | |
991 | pos = strchr(attr, '}'); | |
992 | if (pos == NULL) { | |
993 | err(udev, "missing closing brace for format\n"); | |
994 | return NULL; | |
95776dc6 | 995 | } |
6880b25d KS |
996 | pos[0] = '\0'; |
997 | dbg(udev, "attribute='%s'\n", attr); | |
998 | return attr; | |
95776dc6 | 999 | } |
6880b25d KS |
1000 | return NULL; |
1001 | } | |
95776dc6 | 1002 | |
0ef254d5 KS |
1003 | static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type, |
1004 | enum operation_type op, | |
1005 | const char *value, const void *data) | |
6880b25d KS |
1006 | { |
1007 | struct token *token = &rule_tmp->token[rule_tmp->token_cur]; | |
32028733 | 1008 | const char *attr = NULL; |
ac218d9c KS |
1009 | |
1010 | memset(token, 0x00, sizeof(struct token)); | |
6880b25d KS |
1011 | |
1012 | switch (type) { | |
6880b25d KS |
1013 | case TK_M_ACTION: |
1014 | case TK_M_DEVPATH: | |
1015 | case TK_M_KERNEL: | |
1016 | case TK_M_SUBSYSTEM: | |
1017 | case TK_M_DRIVER: | |
7aeeaedc | 1018 | case TK_M_WAITFOR: |
6880b25d KS |
1019 | case TK_M_DEVLINK: |
1020 | case TK_M_NAME: | |
1021 | case TK_M_KERNELS: | |
1022 | case TK_M_SUBSYSTEMS: | |
1023 | case TK_M_DRIVERS: | |
7df0ed83 | 1024 | case TK_M_TAGS: |
6880b25d KS |
1025 | case TK_M_PROGRAM: |
1026 | case TK_M_IMPORT_FILE: | |
1027 | case TK_M_IMPORT_PROG: | |
5539f624 | 1028 | case TK_M_IMPORT_DB: |
c4f6dcc4 | 1029 | case TK_M_IMPORT_CMDLINE: |
6880b25d KS |
1030 | case TK_M_IMPORT_PARENT: |
1031 | case TK_M_RESULT: | |
1032 | case TK_A_OWNER: | |
1033 | case TK_A_GROUP: | |
1034 | case TK_A_MODE: | |
1035 | case TK_A_NAME: | |
6880b25d | 1036 | case TK_A_GOTO: |
3f896a2a | 1037 | case TK_M_TAG: |
28460195 | 1038 | case TK_A_TAG: |
6880b25d | 1039 | token->key.value_off = add_string(rule_tmp->rules, value); |
e57e7bc1 | 1040 | break; |
d7867b31 | 1041 | case TK_M_IMPORT_BUILTIN: |
81dadce5 | 1042 | token->key.value_off = add_string(rule_tmp->rules, value); |
d7867b31 KS |
1043 | token->key.builtin_cmd = *(enum udev_builtin_cmd *)data; |
1044 | break; | |
6880b25d KS |
1045 | case TK_M_ENV: |
1046 | case TK_M_ATTR: | |
1047 | case TK_M_ATTRS: | |
1048 | case TK_A_ATTR: | |
1049 | case TK_A_ENV: | |
32028733 | 1050 | attr = data; |
6880b25d KS |
1051 | token->key.value_off = add_string(rule_tmp->rules, value); |
1052 | token->key.attr_off = add_string(rule_tmp->rules, attr); | |
1053 | break; | |
6c29f2b9 KS |
1054 | case TK_A_DEVLINK: |
1055 | token->key.value_off = add_string(rule_tmp->rules, value); | |
1056 | token->key.devlink_unique = *(int *)data; | |
1057 | break; | |
6880b25d | 1058 | case TK_M_TEST: |
6880b25d | 1059 | token->key.value_off = add_string(rule_tmp->rules, value); |
ac218d9c KS |
1060 | if (data != NULL) |
1061 | token->key.mode = *(mode_t *)data; | |
6880b25d | 1062 | break; |
6880b25d KS |
1063 | case TK_A_STRING_ESCAPE_NONE: |
1064 | case TK_A_STRING_ESCAPE_REPLACE: | |
9ead6627 | 1065 | case TK_A_DB_PERSIST: |
5d69a34c | 1066 | break; |
6880b25d KS |
1067 | case TK_A_RUN: |
1068 | token->key.value_off = add_string(rule_tmp->rules, value); | |
6880b25d | 1069 | break; |
46f194cb | 1070 | case TK_A_INOTIFY_WATCH: |
6880b25d KS |
1071 | case TK_A_DEVLINK_PRIO: |
1072 | token->key.devlink_prio = *(int *)data; | |
1073 | break; | |
1074 | case TK_A_OWNER_ID: | |
1075 | token->key.uid = *(uid_t *)data; | |
1076 | break; | |
1077 | case TK_A_GROUP_ID: | |
1078 | token->key.gid = *(gid_t *)data; | |
1079 | break; | |
1080 | case TK_A_MODE_ID: | |
1081 | token->key.mode = *(mode_t *)data; | |
1082 | break; | |
761dfddc KS |
1083 | case TK_A_STATIC_NODE: |
1084 | token->key.value_off = add_string(rule_tmp->rules, value); | |
1085 | break; | |
2181d30a | 1086 | case TK_M_EVENT_TIMEOUT: |
6880b25d KS |
1087 | token->key.event_timeout = *(int *)data; |
1088 | break; | |
1089 | case TK_RULE: | |
d15fcce4 | 1090 | case TK_M_PARENTS_MIN: |
b0f7409f | 1091 | case TK_M_PARENTS_MAX: |
ac218d9c | 1092 | case TK_M_MAX: |
6880b25d | 1093 | case TK_END: |
ac218d9c | 1094 | case TK_UNSET: |
6880b25d KS |
1095 | err(rule_tmp->rules->udev, "wrong type %u\n", type); |
1096 | return -1; | |
724257d9 | 1097 | } |
ac218d9c | 1098 | |
fb045134 KS |
1099 | if (value != NULL && type < TK_M_MAX) { |
1100 | /* check if we need to split or call fnmatch() while matching rules */ | |
32028733 | 1101 | enum string_glob_type glob; |
fb045134 KS |
1102 | int has_split; |
1103 | int has_glob; | |
1104 | ||
1105 | has_split = (strchr(value, '|') != NULL); | |
32028733 | 1106 | has_glob = (strchr(value, '*') != NULL || strchr(value, '?') != NULL || strchr(value, '[') != NULL); |
fb045134 KS |
1107 | if (has_split && has_glob) { |
1108 | glob = GL_SPLIT_GLOB; | |
1109 | } else if (has_split) { | |
1110 | glob = GL_SPLIT; | |
1111 | } else if (has_glob) { | |
1112 | if (strcmp(value, "?*") == 0) | |
1113 | glob = GL_SOMETHING; | |
1114 | else | |
1115 | glob = GL_GLOB; | |
32028733 KS |
1116 | } else { |
1117 | glob = GL_PLAIN; | |
ac218d9c | 1118 | } |
32028733 KS |
1119 | token->key.glob = glob; |
1120 | } | |
1121 | ||
1122 | if (value != NULL && type > TK_M_MAX) { | |
1123 | /* check if assigned value has substitution chars */ | |
1124 | if (value[0] == '[') | |
1125 | token->key.subst = SB_SUBSYS; | |
1126 | else if (strchr(value, '%') != NULL || strchr(value, '$') != NULL) | |
1127 | token->key.subst = SB_FORMAT; | |
1128 | else | |
1129 | token->key.subst = SB_NONE; | |
1130 | } | |
1131 | ||
1132 | if (attr != NULL) { | |
1133 | /* check if property/attribut name has substitution chars */ | |
1134 | if (attr[0] == '[') | |
1135 | token->key.attrsubst = SB_SUBSYS; | |
1136 | else if (strchr(attr, '%') != NULL || strchr(attr, '$') != NULL) | |
1137 | token->key.attrsubst = SB_FORMAT; | |
1138 | else | |
1139 | token->key.attrsubst = SB_NONE; | |
ac218d9c KS |
1140 | } |
1141 | ||
0ef254d5 | 1142 | token->key.type = type; |
6880b25d KS |
1143 | token->key.op = op; |
1144 | rule_tmp->token_cur++; | |
1145 | if (rule_tmp->token_cur >= ARRAY_SIZE(rule_tmp->token)) { | |
1146 | err(rule_tmp->rules->udev, "temporary rule array too small\n"); | |
1147 | return -1; | |
e57e7bc1 | 1148 | } |
6880b25d KS |
1149 | return 0; |
1150 | } | |
e57e7bc1 | 1151 | |
6880b25d KS |
1152 | static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp) |
1153 | { | |
1154 | unsigned int i; | |
1155 | unsigned int start = 0; | |
1156 | unsigned int end = rule_tmp->token_cur; | |
1157 | ||
1158 | for (i = 0; i < rule_tmp->token_cur; i++) { | |
ac218d9c | 1159 | enum token_type next_val = TK_UNSET; |
78715f65 | 1160 | unsigned int next_idx = 0; |
6880b25d KS |
1161 | unsigned int j; |
1162 | ||
1163 | /* find smallest value */ | |
1164 | for (j = start; j < end; j++) { | |
ac218d9c | 1165 | if (rule_tmp->token[j].type == TK_UNSET) |
6880b25d | 1166 | continue; |
ac218d9c | 1167 | if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) { |
6880b25d KS |
1168 | next_val = rule_tmp->token[j].type; |
1169 | next_idx = j; | |
db6e59df | 1170 | } |
5618b561 | 1171 | } |
5618b561 | 1172 | |
6880b25d KS |
1173 | /* add token and mark done */ |
1174 | if (add_token(rules, &rule_tmp->token[next_idx]) != 0) | |
1175 | return -1; | |
ac218d9c | 1176 | rule_tmp->token[next_idx].type = TK_UNSET; |
956cf793 | 1177 | |
6880b25d KS |
1178 | /* shrink range */ |
1179 | if (next_idx == start) | |
1180 | start++; | |
1181 | if (next_idx+1 == end) | |
1182 | end--; | |
d0c8cb7d | 1183 | } |
e57e7bc1 | 1184 | return 0; |
724257d9 GKH |
1185 | } |
1186 | ||
6880b25d KS |
1187 | static int add_rule(struct udev_rules *rules, char *line, |
1188 | const char *filename, unsigned int filename_off, unsigned int lineno) | |
724257d9 | 1189 | { |
6880b25d KS |
1190 | char *linepos; |
1191 | char *attr; | |
6880b25d | 1192 | struct rule_tmp rule_tmp; |
724257d9 | 1193 | |
6880b25d KS |
1194 | memset(&rule_tmp, 0x00, sizeof(struct rule_tmp)); |
1195 | rule_tmp.rules = rules; | |
1196 | rule_tmp.rule.type = TK_RULE; | |
1197 | rule_tmp.rule.rule.filename_off = filename_off; | |
0ef254d5 | 1198 | rule_tmp.rule.rule.filename_line = lineno; |
724257d9 | 1199 | |
6880b25d | 1200 | linepos = line; |
88cbfb09 | 1201 | for (;;) { |
6880b25d KS |
1202 | char *key; |
1203 | char *value; | |
ac218d9c | 1204 | enum operation_type op; |
6880b25d KS |
1205 | |
1206 | if (get_key(rules->udev, &linepos, &key, &op, &value) != 0) | |
6bf0ffe8 KS |
1207 | break; |
1208 | ||
bd75fddb | 1209 | if (strcmp(key, "ACTION") == 0) { |
b0f7409f | 1210 | if (op > OP_MATCH_MAX) { |
6880b25d KS |
1211 | err(rules->udev, "invalid ACTION operation\n"); |
1212 | goto invalid; | |
1213 | } | |
0ef254d5 | 1214 | rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL); |
bf5d2964 KS |
1215 | continue; |
1216 | } | |
1217 | ||
bd75fddb | 1218 | if (strcmp(key, "DEVPATH") == 0) { |
b0f7409f | 1219 | if (op > OP_MATCH_MAX) { |
6880b25d KS |
1220 | err(rules->udev, "invalid DEVPATH operation\n"); |
1221 | goto invalid; | |
fd9efc00 | 1222 | } |
0ef254d5 | 1223 | rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL); |
6880b25d KS |
1224 | continue; |
1225 | } | |
c7521974 | 1226 | |
bd75fddb | 1227 | if (strcmp(key, "KERNEL") == 0) { |
b0f7409f | 1228 | if (op > OP_MATCH_MAX) { |
c7521974 KS |
1229 | err(rules->udev, "invalid KERNEL operation\n"); |
1230 | goto invalid; | |
1231 | } | |
0ef254d5 | 1232 | rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL); |
c7521974 KS |
1233 | continue; |
1234 | } | |
1235 | ||
bd75fddb | 1236 | if (strcmp(key, "SUBSYSTEM") == 0) { |
b0f7409f | 1237 | if (op > OP_MATCH_MAX) { |
c7521974 KS |
1238 | err(rules->udev, "invalid SUBSYSTEM operation\n"); |
1239 | goto invalid; | |
1240 | } | |
1241 | /* bus, class, subsystem events should all be the same */ | |
1242 | if (strcmp(value, "subsystem") == 0 || | |
1243 | strcmp(value, "bus") == 0 || | |
1244 | strcmp(value, "class") == 0) { | |
1245 | if (strcmp(value, "bus") == 0 || strcmp(value, "class") == 0) | |
1246 | err(rules->udev, "'%s' must be specified as 'subsystem' \n" | |
1247 | "please fix it in %s:%u", value, filename, lineno); | |
0ef254d5 | 1248 | rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL); |
c7521974 | 1249 | } else |
0ef254d5 | 1250 | rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL); |
c7521974 KS |
1251 | continue; |
1252 | } | |
1253 | ||
bd75fddb | 1254 | if (strcmp(key, "DRIVER") == 0) { |
b0f7409f | 1255 | if (op > OP_MATCH_MAX) { |
c7521974 KS |
1256 | err(rules->udev, "invalid DRIVER operation\n"); |
1257 | goto invalid; | |
1258 | } | |
0ef254d5 | 1259 | rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL); |
c7521974 KS |
1260 | continue; |
1261 | } | |
1262 | ||
bd75fddb | 1263 | if (strncmp(key, "ATTR{", sizeof("ATTR{")-1) == 0) { |
6880b25d | 1264 | attr = get_key_attribute(rules->udev, key + sizeof("ATTR")-1); |
c7521974 KS |
1265 | if (attr == NULL) { |
1266 | err(rules->udev, "error parsing ATTR attribute\n"); | |
1267 | goto invalid; | |
1268 | } | |
b0f7409f | 1269 | if (op < OP_MATCH_MAX) { |
0ef254d5 | 1270 | rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr); |
6880b25d | 1271 | } else { |
0ef254d5 | 1272 | rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr); |
6880b25d | 1273 | } |
c7521974 KS |
1274 | continue; |
1275 | } | |
1276 | ||
6d87ee2e | 1277 | if (strcmp(key, "KERNELS") == 0) { |
b0f7409f | 1278 | if (op > OP_MATCH_MAX) { |
c7521974 KS |
1279 | err(rules->udev, "invalid KERNELS operation\n"); |
1280 | goto invalid; | |
1281 | } | |
0ef254d5 | 1282 | rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL); |
c7521974 KS |
1283 | continue; |
1284 | } | |
1285 | ||
6d87ee2e KS |
1286 | if (strcmp(key, "SUBSYSTEMS") == 0) { |
1287 | if (op > OP_MATCH_MAX) { | |
1288 | err(rules->udev, "invalid SUBSYSTEMS operation\n"); | |
1289 | goto invalid; | |
1290 | } | |
1291 | rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL); | |
1292 | continue; | |
1293 | } | |
1294 | ||
bd75fddb | 1295 | if (strcmp(key, "DRIVERS") == 0) { |
b0f7409f | 1296 | if (op > OP_MATCH_MAX) { |
c7521974 KS |
1297 | err(rules->udev, "invalid DRIVERS operation\n"); |
1298 | goto invalid; | |
1299 | } | |
0ef254d5 | 1300 | rule_add_key(&rule_tmp, TK_M_DRIVERS, op, value, NULL); |
c7521974 KS |
1301 | continue; |
1302 | } | |
1303 | ||
6d87ee2e | 1304 | if (strncmp(key, "ATTRS{", sizeof("ATTRS{")-1) == 0) { |
b0f7409f | 1305 | if (op > OP_MATCH_MAX) { |
c7521974 KS |
1306 | err(rules->udev, "invalid ATTRS operation\n"); |
1307 | goto invalid; | |
1308 | } | |
6880b25d | 1309 | attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1); |
c7521974 KS |
1310 | if (attr == NULL) { |
1311 | err(rules->udev, "error parsing ATTRS attribute\n"); | |
1312 | goto invalid; | |
1313 | } | |
1314 | if (strncmp(attr, "device/", 7) == 0) | |
1315 | err(rules->udev, "the 'device' link may not be available in a future kernel, " | |
1316 | "please fix it in %s:%u", filename, lineno); | |
1317 | else if (strstr(attr, "../") != NULL) | |
1318 | err(rules->udev, "do not reference parent sysfs directories directly, " | |
1319 | "it may break with a future kernel, please fix it in %s:%u", filename, lineno); | |
0ef254d5 | 1320 | rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr); |
c7521974 KS |
1321 | continue; |
1322 | } | |
1323 | ||
7df0ed83 KS |
1324 | if (strcmp(key, "TAGS") == 0) { |
1325 | if (op > OP_MATCH_MAX) { | |
1326 | err(rules->udev, "invalid TAGS operation\n"); | |
1327 | goto invalid; | |
1328 | } | |
1329 | rule_add_key(&rule_tmp, TK_M_TAGS, op, value, NULL); | |
1330 | continue; | |
1331 | } | |
1332 | ||
bd75fddb | 1333 | if (strncmp(key, "ENV{", sizeof("ENV{")-1) == 0) { |
6880b25d | 1334 | attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1); |
c7521974 KS |
1335 | if (attr == NULL) { |
1336 | err(rules->udev, "error parsing ENV attribute\n"); | |
1337 | goto invalid; | |
1338 | } | |
b0f7409f | 1339 | if (op < OP_MATCH_MAX) { |
0ef254d5 | 1340 | if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0) |
6880b25d KS |
1341 | goto invalid; |
1342 | } else { | |
ace6bfa7 KS |
1343 | static const char *blacklist[] = { |
1344 | "ACTION", | |
1345 | "SUBSYSTEM", | |
1346 | "DEVTYPE", | |
1347 | "MAJOR", | |
1348 | "MINOR", | |
1349 | "DRIVER", | |
1350 | "IFINDEX", | |
1351 | "DEVNAME", | |
1352 | "DEVLINKS", | |
1353 | "DEVPATH", | |
1354 | "TAGS", | |
1355 | }; | |
1356 | unsigned int i; | |
1357 | ||
1358 | for (i = 0; i < ARRAY_SIZE(blacklist); i++) | |
1359 | if (strcmp(attr, blacklist[i]) == 0) { | |
1360 | err(rules->udev, "invalid ENV attribute, '%s' can not be set %s:%u\n", attr, filename, lineno); | |
1361 | continue; | |
1362 | } | |
0ef254d5 | 1363 | if (rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr) != 0) |
6880b25d KS |
1364 | goto invalid; |
1365 | } | |
c7521974 KS |
1366 | continue; |
1367 | } | |
1368 | ||
28460195 | 1369 | if (strcmp(key, "TAG") == 0) { |
3f896a2a KS |
1370 | if (op < OP_MATCH_MAX) |
1371 | rule_add_key(&rule_tmp, TK_M_TAG, op, value, NULL); | |
1372 | else | |
1373 | rule_add_key(&rule_tmp, TK_A_TAG, op, value, NULL); | |
28460195 KS |
1374 | continue; |
1375 | } | |
1376 | ||
bd75fddb | 1377 | if (strcmp(key, "PROGRAM") == 0) { |
0ef254d5 | 1378 | rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL); |
c7521974 KS |
1379 | continue; |
1380 | } | |
1381 | ||
bd75fddb | 1382 | if (strcmp(key, "RESULT") == 0) { |
b0f7409f | 1383 | if (op > OP_MATCH_MAX) { |
c7521974 KS |
1384 | err(rules->udev, "invalid RESULT operation\n"); |
1385 | goto invalid; | |
1386 | } | |
0ef254d5 | 1387 | rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL); |
c7521974 KS |
1388 | continue; |
1389 | } | |
1390 | ||
bd75fddb | 1391 | if (strncmp(key, "IMPORT", sizeof("IMPORT")-1) == 0) { |
6880b25d | 1392 | attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1); |
d7867b31 KS |
1393 | if (attr == NULL) { |
1394 | err(rules->udev, "IMPORT{} type missing, ignoring IMPORT %s:%u\n", filename, lineno); | |
1395 | continue; | |
1396 | } | |
1397 | if (strstr(attr, "program")) { | |
1398 | /* find known built-in command */ | |
1399 | if (value[0] != '/') { | |
d7867b31 KS |
1400 | enum udev_builtin_cmd cmd; |
1401 | ||
81dadce5 | 1402 | cmd = udev_builtin_lookup(value); |
d7867b31 | 1403 | if (cmd < UDEV_BUILTIN_MAX) { |
81dadce5 KS |
1404 | info(rules->udev, "IMPORT found builtin '%s', replacing %s:%u\n", |
1405 | value, filename, lineno); | |
1406 | rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, value, &cmd); | |
d7867b31 KS |
1407 | continue; |
1408 | } | |
1409 | } | |
c7521974 | 1410 | dbg(rules->udev, "IMPORT will be executed\n"); |
0ef254d5 | 1411 | rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL); |
d7867b31 KS |
1412 | } else if (strstr(attr, "builtin")) { |
1413 | enum udev_builtin_cmd cmd = udev_builtin_lookup(value); | |
1414 | ||
1415 | dbg(rules->udev, "IMPORT execute builtin\n"); | |
1416 | if (cmd < UDEV_BUILTIN_MAX) | |
81dadce5 | 1417 | rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, value, &cmd); |
d7867b31 KS |
1418 | else |
1419 | err(rules->udev, "IMPORT{builtin}: '%s' unknown %s:%u\n", value, filename, lineno); | |
1420 | } else if (strstr(attr, "file")) { | |
c7521974 | 1421 | dbg(rules->udev, "IMPORT will be included as file\n"); |
0ef254d5 | 1422 | rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL); |
d7867b31 | 1423 | } else if (strstr(attr, "db")) { |
5539f624 KS |
1424 | dbg(rules->udev, "IMPORT will include db values\n"); |
1425 | rule_add_key(&rule_tmp, TK_M_IMPORT_DB, op, value, NULL); | |
d7867b31 | 1426 | } else if (strstr(attr, "cmdline")) { |
c4f6dcc4 KS |
1427 | dbg(rules->udev, "IMPORT will include db values\n"); |
1428 | rule_add_key(&rule_tmp, TK_M_IMPORT_CMDLINE, op, value, NULL); | |
d7867b31 | 1429 | } else if (strstr(attr, "parent")) { |
c7521974 | 1430 | dbg(rules->udev, "IMPORT will include the parent values\n"); |
0ef254d5 | 1431 | rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL); |
c7521974 | 1432 | } |
c7521974 KS |
1433 | continue; |
1434 | } | |
1435 | ||
bd75fddb | 1436 | if (strncmp(key, "TEST", sizeof("TEST")-1) == 0) { |
6880b25d KS |
1437 | mode_t mode = 0; |
1438 | ||
b0f7409f | 1439 | if (op > OP_MATCH_MAX) { |
c7521974 KS |
1440 | err(rules->udev, "invalid TEST operation\n"); |
1441 | goto invalid; | |
1442 | } | |
6880b25d KS |
1443 | attr = get_key_attribute(rules->udev, key + sizeof("TEST")-1); |
1444 | if (attr != NULL) { | |
1445 | mode = strtol(attr, NULL, 8); | |
0ef254d5 | 1446 | rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode); |
6880b25d | 1447 | } else { |
0ef254d5 | 1448 | rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL); |
6880b25d | 1449 | } |
c7521974 KS |
1450 | continue; |
1451 | } | |
1452 | ||
289a1821 KS |
1453 | if (strcmp(key, "RUN") == 0) { |
1454 | rule_add_key(&rule_tmp, TK_A_RUN, op, value, NULL); | |
c7521974 KS |
1455 | continue; |
1456 | } | |
1457 | ||
bd75fddb | 1458 | if (strcmp(key, "WAIT_FOR") == 0 || strcmp(key, "WAIT_FOR_SYSFS") == 0) { |
0ef254d5 | 1459 | rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL); |
c7521974 KS |
1460 | continue; |
1461 | } | |
1462 | ||
bd75fddb | 1463 | if (strcmp(key, "LABEL") == 0) { |
6880b25d | 1464 | rule_tmp.rule.rule.label_off = add_string(rules, value); |
c7521974 KS |
1465 | continue; |
1466 | } | |
1467 | ||
bd75fddb | 1468 | if (strcmp(key, "GOTO") == 0) { |
0ef254d5 | 1469 | rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL); |
c7521974 KS |
1470 | continue; |
1471 | } | |
1472 | ||
bd75fddb | 1473 | if (strncmp(key, "NAME", sizeof("NAME")-1) == 0) { |
b0f7409f | 1474 | if (op < OP_MATCH_MAX) { |
0ef254d5 | 1475 | rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL); |
6880b25d | 1476 | } else { |
75cb1ac5 | 1477 | if (strcmp(value, "%k") == 0) { |
d0d7b8d0 | 1478 | err(rules->udev, "NAME=\"%%k\" is ignored, because it breaks kernel supplied names, " |
75cb1ac5 KS |
1479 | "please remove it from %s:%u\n", filename, lineno); |
1480 | continue; | |
1481 | } | |
d0d7b8d0 KS |
1482 | if (value[0] == '\0') { |
1483 | info(rules->udev, "NAME=\"\" is ignored, because udev will not delete any device nodes, " | |
1484 | "please remove it from %s:%u\n", filename, lineno); | |
75cb1ac5 | 1485 | continue; |
d0d7b8d0 | 1486 | } |
0ef254d5 | 1487 | rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL); |
c7521974 | 1488 | } |
761dfddc | 1489 | rule_tmp.rule.rule.can_set_name = true; |
c7521974 KS |
1490 | continue; |
1491 | } | |
1492 | ||
bcb8b231 | 1493 | if (strncmp(key, "SYMLINK", sizeof("SYMLINK")-1) == 0) { |
6c29f2b9 | 1494 | if (op < OP_MATCH_MAX) { |
0ef254d5 | 1495 | rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL); |
6c29f2b9 KS |
1496 | } else { |
1497 | int flag = 0; | |
1498 | ||
1499 | attr = get_key_attribute(rules->udev, key + sizeof("SYMLINK")-1); | |
1500 | if (attr != NULL && strstr(attr, "unique") != NULL) | |
1501 | flag = 1; | |
1502 | rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, &flag); | |
1503 | } | |
761dfddc | 1504 | rule_tmp.rule.rule.can_set_name = true; |
b0f7409f KS |
1505 | continue; |
1506 | } | |
c7521974 | 1507 | |
bd75fddb | 1508 | if (strcmp(key, "OWNER") == 0) { |
6880b25d KS |
1509 | uid_t uid; |
1510 | char *endptr; | |
1511 | ||
1512 | uid = strtoul(value, &endptr, 10); | |
1513 | if (endptr[0] == '\0') { | |
0ef254d5 | 1514 | rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid); |
5f03ed8a | 1515 | } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) { |
154a7b84 | 1516 | uid = add_uid(rules, value); |
0ef254d5 | 1517 | rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid); |
055e40ed | 1518 | } else if (rules->resolve_names >= 0) { |
0ef254d5 | 1519 | rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL); |
c7521974 | 1520 | } |
761dfddc | 1521 | rule_tmp.rule.rule.can_set_name = true; |
c7521974 KS |
1522 | continue; |
1523 | } | |
1524 | ||
bd75fddb | 1525 | if (strcmp(key, "GROUP") == 0) { |
6880b25d KS |
1526 | gid_t gid; |
1527 | char *endptr; | |
1528 | ||
1529 | gid = strtoul(value, &endptr, 10); | |
1530 | if (endptr[0] == '\0') { | |
0ef254d5 | 1531 | rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid); |
5f03ed8a | 1532 | } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) { |
154a7b84 | 1533 | gid = add_gid(rules, value); |
0ef254d5 | 1534 | rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid); |
055e40ed | 1535 | } else if (rules->resolve_names >= 0) { |
0ef254d5 | 1536 | rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL); |
c7521974 | 1537 | } |
761dfddc | 1538 | rule_tmp.rule.rule.can_set_name = true; |
c7521974 KS |
1539 | continue; |
1540 | } | |
1541 | ||
bd75fddb | 1542 | if (strcmp(key, "MODE") == 0) { |
6880b25d KS |
1543 | mode_t mode; |
1544 | char *endptr; | |
1545 | ||
1546 | mode = strtol(value, &endptr, 8); | |
1547 | if (endptr[0] == '\0') | |
0ef254d5 | 1548 | rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode); |
6880b25d | 1549 | else |
0ef254d5 | 1550 | rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL); |
761dfddc | 1551 | rule_tmp.rule.rule.can_set_name = true; |
c7521974 KS |
1552 | continue; |
1553 | } | |
1554 | ||
bd75fddb | 1555 | if (strcmp(key, "OPTIONS") == 0) { |
c7521974 KS |
1556 | const char *pos; |
1557 | ||
c7521974 KS |
1558 | pos = strstr(value, "link_priority="); |
1559 | if (pos != NULL) { | |
6880b25d KS |
1560 | int prio = atoi(&pos[strlen("link_priority=")]); |
1561 | ||
3b529da4 | 1562 | rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, op, NULL, &prio); |
6880b25d | 1563 | dbg(rules->udev, "link priority=%i\n", prio); |
c7521974 | 1564 | } |
9ead6627 | 1565 | |
c7521974 KS |
1566 | pos = strstr(value, "event_timeout="); |
1567 | if (pos != NULL) { | |
6880b25d KS |
1568 | int tout = atoi(&pos[strlen("event_timeout=")]); |
1569 | ||
2181d30a | 1570 | rule_add_key(&rule_tmp, TK_M_EVENT_TIMEOUT, op, NULL, &tout); |
214a6c79 | 1571 | dbg(rules->udev, "event timeout=%i\n", tout); |
c7521974 | 1572 | } |
9ead6627 | 1573 | |
c7521974 KS |
1574 | pos = strstr(value, "string_escape="); |
1575 | if (pos != NULL) { | |
1576 | pos = &pos[strlen("string_escape=")]; | |
1577 | if (strncmp(pos, "none", strlen("none")) == 0) | |
3b529da4 | 1578 | rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, op, NULL, NULL); |
c7521974 | 1579 | else if (strncmp(pos, "replace", strlen("replace")) == 0) |
3b529da4 | 1580 | rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, op, NULL, NULL); |
c7521974 | 1581 | } |
9ead6627 | 1582 | |
d3990a57 | 1583 | pos = strstr(value, "db_persist"); |
9ead6627 KS |
1584 | if (pos != NULL) |
1585 | rule_add_key(&rule_tmp, TK_A_DB_PERSIST, op, NULL, NULL); | |
1586 | ||
46f194cb | 1587 | pos = strstr(value, "nowatch"); |
bd284db1 | 1588 | if (pos != NULL) { |
46f194cb KS |
1589 | const int off = 0; |
1590 | ||
3b529da4 | 1591 | rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &off); |
46f194cb KS |
1592 | dbg(rules->udev, "inotify watch of device disabled\n"); |
1593 | } else { | |
1594 | pos = strstr(value, "watch"); | |
1595 | if (pos != NULL) { | |
1596 | const int on = 1; | |
1597 | ||
3b529da4 | 1598 | rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &on); |
46f194cb KS |
1599 | dbg(rules->udev, "inotify watch of device requested\n"); |
1600 | } | |
bd284db1 | 1601 | } |
9ead6627 | 1602 | |
761dfddc KS |
1603 | pos = strstr(value, "static_node="); |
1604 | if (pos != NULL) { | |
3b529da4 | 1605 | rule_add_key(&rule_tmp, TK_A_STATIC_NODE, op, &pos[strlen("static_node=")], NULL); |
761dfddc KS |
1606 | rule_tmp.rule.rule.has_static_node = true; |
1607 | } | |
9ead6627 | 1608 | |
c7521974 KS |
1609 | continue; |
1610 | } | |
95691487 | 1611 | |
c7521974 | 1612 | err(rules->udev, "unknown key '%s' in %s:%u\n", key, filename, lineno); |
95691487 | 1613 | goto invalid; |
c7521974 KS |
1614 | } |
1615 | ||
6880b25d | 1616 | /* add rule token */ |
3f3aa9f5 | 1617 | rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur; |
6880b25d KS |
1618 | if (add_token(rules, &rule_tmp.rule) != 0) |
1619 | goto invalid; | |
c7521974 | 1620 | |
6880b25d KS |
1621 | /* add tokens to list, sorted by type */ |
1622 | if (sort_token(rules, &rule_tmp) != 0) | |
1623 | goto invalid; | |
3f3aa9f5 | 1624 | |
6880b25d | 1625 | return 0; |
c7521974 KS |
1626 | invalid: |
1627 | err(rules->udev, "invalid rule '%s:%u'\n", filename, lineno); | |
1628 | return -1; | |
1629 | } | |
1630 | ||
0ef254d5 | 1631 | static int parse_file(struct udev_rules *rules, const char *filename, unsigned short filename_off) |
c7521974 KS |
1632 | { |
1633 | FILE *f; | |
77f89e93 | 1634 | unsigned int first_token; |
c7521974 | 1635 | char line[UTIL_LINE_SIZE]; |
6880b25d KS |
1636 | int line_nr = 0; |
1637 | unsigned int i; | |
c7521974 | 1638 | |
c7521974 KS |
1639 | info(rules->udev, "reading '%s' as rules file\n", filename); |
1640 | ||
1641 | f = fopen(filename, "r"); | |
1642 | if (f == NULL) | |
1643 | return -1; | |
77f89e93 KS |
1644 | |
1645 | first_token = rules->token_cur; | |
1646 | ||
335e316a | 1647 | while (fgets(line, sizeof(line), f) != NULL) { |
c7521974 KS |
1648 | char *key; |
1649 | size_t len; | |
1650 | ||
1651 | /* skip whitespace */ | |
1652 | line_nr++; | |
1653 | key = line; | |
1654 | while (isspace(key[0])) | |
1655 | key++; | |
1656 | ||
1657 | /* comment */ | |
1658 | if (key[0] == '#') | |
1659 | continue; | |
1660 | ||
1661 | len = strlen(line); | |
1662 | if (len < 3) | |
1663 | continue; | |
1664 | ||
1665 | /* continue reading if backslash+newline is found */ | |
1666 | while (line[len-2] == '\\') { | |
1667 | if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL) | |
1668 | break; | |
6d691b2b FZ |
1669 | if (strlen(&line[len-2]) < 2) |
1670 | break; | |
c7521974 KS |
1671 | line_nr++; |
1672 | len = strlen(line); | |
1673 | } | |
1674 | ||
1675 | if (len+1 >= sizeof(line)) { | |
1676 | err(rules->udev, "line too long '%s':%u, ignored\n", filename, line_nr); | |
1677 | continue; | |
1678 | } | |
6880b25d | 1679 | add_rule(rules, key, filename, filename_off, line_nr); |
c7521974 KS |
1680 | } |
1681 | fclose(f); | |
1682 | ||
6880b25d | 1683 | /* link GOTOs to LABEL rules in this file to be able to fast-forward */ |
77f89e93 | 1684 | for (i = first_token+1; i < rules->token_cur; i++) { |
6880b25d KS |
1685 | if (rules->tokens[i].type == TK_A_GOTO) { |
1686 | char *label = &rules->buf[rules->tokens[i].key.value_off]; | |
1687 | unsigned int j; | |
1688 | ||
1689 | for (j = i+1; j < rules->token_cur; j++) { | |
1690 | if (rules->tokens[j].type != TK_RULE) | |
1691 | continue; | |
1692 | if (rules->tokens[j].rule.label_off == 0) | |
1693 | continue; | |
1694 | if (strcmp(label, &rules->buf[rules->tokens[j].rule.label_off]) != 0) | |
1695 | continue; | |
1696 | rules->tokens[i].key.rule_goto = j; | |
0c377989 | 1697 | break; |
c7521974 | 1698 | } |
6880b25d KS |
1699 | if (rules->tokens[i].key.rule_goto == 0) |
1700 | err(rules->udev, "GOTO '%s' has no matching label in: '%s'\n", label, filename); | |
c7521974 KS |
1701 | } |
1702 | } | |
1703 | return 0; | |
1704 | } | |
1705 | ||
869c9031 | 1706 | static int add_matching_files(struct udev *udev, struct udev_list *file_list, const char *dirname, const char *suffix) |
c7521974 | 1707 | { |
c7521974 | 1708 | DIR *dir; |
c7c32e9c | 1709 | struct dirent *dent; |
c7521974 KS |
1710 | char filename[UTIL_PATH_SIZE]; |
1711 | ||
1712 | dbg(udev, "open directory '%s'\n", dirname); | |
1713 | dir = opendir(dirname); | |
1714 | if (dir == NULL) { | |
92e52e2f | 1715 | info(udev, "unable to open '%s': %m\n", dirname); |
c7521974 KS |
1716 | return -1; |
1717 | } | |
1718 | ||
c7c32e9c | 1719 | for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) { |
78230c0d | 1720 | if (dent->d_name[0] == '.') |
c7521974 KS |
1721 | continue; |
1722 | ||
1723 | /* look for file matching with specified suffix */ | |
1724 | if (suffix != NULL) { | |
1725 | const char *ext; | |
1726 | ||
78230c0d | 1727 | ext = strrchr(dent->d_name, '.'); |
c7521974 KS |
1728 | if (ext == NULL) |
1729 | continue; | |
1730 | if (strcmp(ext, suffix) != 0) | |
1731 | continue; | |
1732 | } | |
e6c1a2bd KS |
1733 | util_strscpyl(filename, sizeof(filename), dirname, "/", dent->d_name, NULL); |
1734 | dbg(udev, "put file '%s' into list\n", filename); | |
c7c32e9c KS |
1735 | /* |
1736 | * the basename is the key, the filename the value | |
1737 | * identical basenames from different directories overwrite each other | |
1738 | * entries are sorted after basename | |
1739 | */ | |
869c9031 | 1740 | udev_list_entry_add(file_list, dent->d_name, filename); |
c7521974 KS |
1741 | } |
1742 | ||
1743 | closedir(dir); | |
1744 | return 0; | |
1745 | } | |
1746 | ||
d7ddce18 | 1747 | struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names) |
c7521974 | 1748 | { |
d7ddce18 | 1749 | struct udev_rules *rules; |
869c9031 | 1750 | struct udev_list file_list; |
c7c32e9c | 1751 | struct udev_list_entry *file_loop; |
6880b25d | 1752 | struct token end_token; |
c7521974 | 1753 | |
27f4528b | 1754 | rules = calloc(1, sizeof(struct udev_rules)); |
d7ddce18 | 1755 | if (rules == NULL) |
6880b25d | 1756 | return NULL; |
c7521974 KS |
1757 | rules->udev = udev; |
1758 | rules->resolve_names = resolve_names; | |
869c9031 | 1759 | udev_list_init(udev, &file_list, true); |
c7521974 | 1760 | |
6880b25d KS |
1761 | /* init token array and string buffer */ |
1762 | rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token)); | |
1851332c YK |
1763 | if (rules->tokens == NULL) { |
1764 | free(rules); | |
34d6a259 | 1765 | return NULL; |
1851332c | 1766 | } |
34d6a259 | 1767 | rules->token_max = PREALLOC_TOKEN; |
bcf44d55 | 1768 | |
6880b25d | 1769 | rules->buf = malloc(PREALLOC_STRBUF); |
1851332c YK |
1770 | if (rules->buf == NULL) { |
1771 | free(rules->tokens); | |
1772 | free(rules); | |
34d6a259 | 1773 | return NULL; |
1851332c | 1774 | } |
34d6a259 KS |
1775 | rules->buf_max = PREALLOC_STRBUF; |
1776 | /* offset 0 is always '\0' */ | |
1777 | rules->buf[0] = '\0'; | |
1778 | rules->buf_cur = 1; | |
86b57788 KS |
1779 | dbg(udev, "prealloc %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n", |
1780 | rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max); | |
6880b25d | 1781 | |
bcf44d55 | 1782 | rules->trie_nodes = malloc(PREALLOC_TRIE * sizeof(struct trie_node)); |
1851332c YK |
1783 | if (rules->trie_nodes == NULL) { |
1784 | free(rules->buf); | |
1785 | free(rules->tokens); | |
1786 | free(rules); | |
bcf44d55 | 1787 | return NULL; |
1851332c | 1788 | } |
bcf44d55 | 1789 | rules->trie_nodes_max = PREALLOC_TRIE; |
949075db | 1790 | /* offset 0 is the trie root, with an empty string */ |
023ed7b0 | 1791 | memset(rules->trie_nodes, 0x00, sizeof(struct trie_node)); |
bcf44d55 KS |
1792 | rules->trie_nodes_cur = 1; |
1793 | ||
c7c32e9c KS |
1794 | if (udev_get_rules_path(udev) == NULL) { |
1795 | char filename[UTIL_PATH_SIZE]; | |
c7521974 | 1796 | |
12a362be | 1797 | /* /usr/lib/udev -- system rules */ |
c7c32e9c KS |
1798 | add_matching_files(udev, &file_list, LIBEXECDIR "/rules.d", ".rules"); |
1799 | ||
12a362be | 1800 | /* /etc/udev -- local administration rules */ |
c7521974 KS |
1801 | add_matching_files(udev, &file_list, SYSCONFDIR "/udev/rules.d", ".rules"); |
1802 | ||
12a362be | 1803 | /* /run/udev -- runtime rules */ |
4ec9c3e7 | 1804 | util_strscpyl(filename, sizeof(filename), udev_get_run_path(udev), "/rules.d", NULL); |
c7c32e9c KS |
1805 | add_matching_files(udev, &file_list, filename, ".rules"); |
1806 | } else { | |
1807 | /* custom rules files location for testing */ | |
1808 | add_matching_files(udev, &file_list, udev_get_rules_path(udev), ".rules"); | |
c7521974 KS |
1809 | } |
1810 | ||
0ef254d5 KS |
1811 | /* add all filenames to the string buffer */ |
1812 | udev_list_entry_foreach(file_loop, udev_list_get_entry(&file_list)) { | |
c7c32e9c | 1813 | const char *filename = udev_list_entry_get_value(file_loop); |
0ef254d5 KS |
1814 | unsigned int filename_off; |
1815 | ||
1816 | filename_off = add_string(rules, filename); | |
1817 | /* the offset in the rule is limited to unsigned short */ | |
1818 | if (filename_off < USHRT_MAX) | |
8958da13 | 1819 | udev_list_entry_set_num(file_loop, filename_off); |
0ef254d5 KS |
1820 | } |
1821 | ||
c7c32e9c KS |
1822 | /* parse all rules files */ |
1823 | udev_list_entry_foreach(file_loop, udev_list_get_entry(&file_list)) { | |
1824 | const char *filename = udev_list_entry_get_value(file_loop); | |
8958da13 | 1825 | unsigned int filename_off = udev_list_entry_get_num(file_loop); |
a178e7fe | 1826 | struct stat st; |
c7521974 | 1827 | |
a178e7fe KS |
1828 | if (stat(filename, &st) != 0) { |
1829 | err(udev, "can not find '%s': %m\n", filename); | |
1830 | continue; | |
1831 | } | |
1832 | if (S_ISREG(st.st_mode) && st.st_size <= 0) { | |
1833 | info(udev, "ignore empty '%s'\n", filename); | |
1834 | continue; | |
1835 | } | |
1836 | if (S_ISCHR(st.st_mode)) { | |
1837 | info(udev, "ignore masked '%s'\n", filename); | |
1838 | continue; | |
1839 | } | |
1840 | parse_file(rules, filename, filename_off); | |
c7521974 | 1841 | } |
869c9031 | 1842 | udev_list_cleanup(&file_list); |
6880b25d KS |
1843 | |
1844 | memset(&end_token, 0x00, sizeof(struct token)); | |
1845 | end_token.type = TK_END; | |
1846 | add_token(rules, &end_token); | |
1847 | ||
154a7b84 | 1848 | /* shrink allocated token and string buffer */ |
6880b25d KS |
1849 | if (rules->token_cur < rules->token_max) { |
1850 | struct token *tokens; | |
1851 | ||
1852 | tokens = realloc(rules->tokens, rules->token_cur * sizeof(struct token)); | |
1853 | if (tokens != NULL || rules->token_cur == 0) { | |
1854 | rules->tokens = tokens; | |
1855 | rules->token_max = rules->token_cur; | |
1856 | } | |
1857 | } | |
1858 | if (rules->buf_cur < rules->buf_max) { | |
1859 | char *buf; | |
1860 | ||
1861 | buf = realloc(rules->buf, rules->buf_cur); | |
1862 | if (buf != NULL || rules->buf_cur == 0) { | |
1863 | rules->buf = buf; | |
1864 | rules->buf_max = rules->buf_cur; | |
1865 | } | |
1866 | } | |
0dd9f015 | 1867 | info(udev, "rules use %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n", |
6880b25d | 1868 | rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max); |
023ed7b0 KS |
1869 | info(udev, "temporary index used %zu bytes (%u * %zu bytes)\n", |
1870 | rules->trie_nodes_cur * sizeof(struct trie_node), | |
1871 | rules->trie_nodes_cur, sizeof(struct trie_node)); | |
1449a55d AJ |
1872 | |
1873 | /* cleanup trie */ | |
bcf44d55 KS |
1874 | free(rules->trie_nodes); |
1875 | rules->trie_nodes = NULL; | |
1876 | rules->trie_nodes_cur = 0; | |
1877 | rules->trie_nodes_max = 0; | |
6880b25d | 1878 | |
154a7b84 KS |
1879 | /* cleanup uid/gid cache */ |
1880 | free(rules->uids); | |
1881 | rules->uids = NULL; | |
1882 | rules->uids_cur = 0; | |
1883 | rules->uids_max = 0; | |
1884 | free(rules->gids); | |
1885 | rules->gids = NULL; | |
1886 | rules->gids_cur = 0; | |
1887 | rules->gids_max = 0; | |
1888 | ||
6880b25d | 1889 | dump_rules(rules); |
d7ddce18 | 1890 | return rules; |
c7521974 KS |
1891 | } |
1892 | ||
d7ddce18 | 1893 | void udev_rules_unref(struct udev_rules *rules) |
c7521974 | 1894 | { |
d7ddce18 KS |
1895 | if (rules == NULL) |
1896 | return; | |
6880b25d KS |
1897 | free(rules->tokens); |
1898 | free(rules->buf); | |
bcf44d55 | 1899 | free(rules->trie_nodes); |
154a7b84 KS |
1900 | free(rules->uids); |
1901 | free(rules->gids); | |
d7ddce18 | 1902 | free(rules); |
c7521974 | 1903 | } |
6880b25d KS |
1904 | |
1905 | static int match_key(struct udev_rules *rules, struct token *token, const char *val) | |
1906 | { | |
6880b25d KS |
1907 | char *key_value = &rules->buf[token->key.value_off]; |
1908 | char *pos; | |
761dfddc | 1909 | bool match = false; |
6880b25d KS |
1910 | |
1911 | if (val == NULL) | |
1912 | val = ""; | |
1913 | ||
ac218d9c KS |
1914 | switch (token->key.glob) { |
1915 | case GL_PLAIN: | |
1916 | match = (strcmp(key_value, val) == 0); | |
1917 | break; | |
1918 | case GL_GLOB: | |
1919 | match = (fnmatch(key_value, val, 0) == 0); | |
1920 | break; | |
1921 | case GL_SPLIT: | |
1922 | { | |
91a75e4a KS |
1923 | const char *split; |
1924 | size_t len; | |
6880b25d | 1925 | |
91a75e4a KS |
1926 | split = &rules->buf[token->key.value_off]; |
1927 | len = strlen(val); | |
88cbfb09 | 1928 | for (;;) { |
91a75e4a KS |
1929 | const char *next; |
1930 | ||
1931 | next = strchr(split, '|'); | |
1932 | if (next != NULL) { | |
1933 | size_t matchlen = (size_t)(next - split); | |
1934 | ||
1935 | match = (matchlen == len && strncmp(split, val, matchlen) == 0); | |
1936 | if (match) | |
1937 | break; | |
1938 | } else { | |
1939 | match = (strcmp(split, val) == 0); | |
ac218d9c | 1940 | break; |
91a75e4a KS |
1941 | } |
1942 | split = &next[1]; | |
6880b25d | 1943 | } |
ac218d9c | 1944 | break; |
6880b25d | 1945 | } |
ac218d9c KS |
1946 | case GL_SPLIT_GLOB: |
1947 | { | |
1948 | char value[UTIL_PATH_SIZE]; | |
1949 | ||
065db052 | 1950 | util_strscpy(value, sizeof(value), &rules->buf[token->key.value_off]); |
ac218d9c KS |
1951 | key_value = value; |
1952 | while (key_value != NULL) { | |
1953 | pos = strchr(key_value, '|'); | |
1954 | if (pos != NULL) { | |
1955 | pos[0] = '\0'; | |
1956 | pos = &pos[1]; | |
1957 | } | |
5d6a1fa6 | 1958 | dbg(rules->udev, "match %s '%s' <-> '%s'\n", token_str(token->type), key_value, val); |
ac218d9c KS |
1959 | match = (fnmatch(key_value, val, 0) == 0); |
1960 | if (match) | |
1961 | break; | |
1962 | key_value = pos; | |
1963 | } | |
1964 | break; | |
1965 | } | |
db463fd3 KS |
1966 | case GL_SOMETHING: |
1967 | match = (val[0] != '\0'); | |
1968 | break; | |
ac218d9c KS |
1969 | case GL_UNSET: |
1970 | return -1; | |
6880b25d KS |
1971 | } |
1972 | ||
b0f7409f | 1973 | if (match && (token->key.op == OP_MATCH)) { |
5d6a1fa6 | 1974 | dbg(rules->udev, "%s is true (matching value)\n", token_str(token->type)); |
6880b25d KS |
1975 | return 0; |
1976 | } | |
b0f7409f | 1977 | if (!match && (token->key.op == OP_NOMATCH)) { |
5d6a1fa6 | 1978 | dbg(rules->udev, "%s is true (non-matching value)\n", token_str(token->type)); |
6880b25d KS |
1979 | return 0; |
1980 | } | |
5d6a1fa6 | 1981 | dbg(rules->udev, "%s is not true\n", token_str(token->type)); |
6880b25d KS |
1982 | return -1; |
1983 | } | |
1984 | ||
1985 | static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur) | |
1986 | { | |
32028733 KS |
1987 | const char *name; |
1988 | char nbuf[UTIL_NAME_SIZE]; | |
1989 | const char *value; | |
1990 | char vbuf[UTIL_NAME_SIZE]; | |
6880b25d KS |
1991 | size_t len; |
1992 | ||
32028733 KS |
1993 | name = &rules->buf[cur->key.attr_off]; |
1994 | switch (cur->key.attrsubst) { | |
1995 | case SB_FORMAT: | |
1996 | udev_event_apply_format(event, name, nbuf, sizeof(nbuf)); | |
1997 | name = nbuf; | |
1998 | /* fall through */ | |
1999 | case SB_NONE: | |
2000 | value = udev_device_get_sysattr_value(dev, name); | |
2001 | if (value == NULL) | |
aeb53ca3 | 2002 | return -1; |
32028733 KS |
2003 | break; |
2004 | case SB_SUBSYS: | |
2005 | if (util_resolve_subsys_kernel(event->udev, name, vbuf, sizeof(vbuf), 1) != 0) | |
2006 | return -1; | |
2007 | value = vbuf; | |
2008 | break; | |
2009 | default: | |
2010 | return -1; | |
6880b25d | 2011 | } |
6880b25d | 2012 | |
32028733 KS |
2013 | /* remove trailing whitespace, if not asked to match for it */ |
2014 | len = strlen(value); | |
2015 | if (len > 0 && isspace(value[len-1])) { | |
2016 | const char *key_value; | |
2017 | size_t klen; | |
2018 | ||
2019 | key_value = &rules->buf[cur->key.value_off]; | |
2020 | klen = strlen(key_value); | |
2021 | if (klen > 0 && !isspace(key_value[klen-1])) { | |
2022 | if (value != vbuf) { | |
2023 | util_strscpy(vbuf, sizeof(vbuf), value); | |
2024 | value = vbuf; | |
2025 | } | |
2026 | while (len > 0 && isspace(vbuf[--len])) | |
2027 | vbuf[len] = '\0'; | |
2028 | dbg(rules->udev, "removed trailing whitespace from '%s'\n", value); | |
2029 | } | |
6880b25d | 2030 | } |
32028733 | 2031 | |
6880b25d KS |
2032 | return match_key(rules, cur, value); |
2033 | } | |
2034 | ||
2035 | enum escape_type { | |
2036 | ESCAPE_UNSET, | |
2037 | ESCAPE_NONE, | |
2038 | ESCAPE_REPLACE, | |
2039 | }; | |
2040 | ||
2181d30a | 2041 | int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event, const sigset_t *sigmask) |
6880b25d | 2042 | { |
6880b25d | 2043 | struct token *cur; |
34d6a259 | 2044 | struct token *rule; |
3e5c7595 | 2045 | enum escape_type esc = ESCAPE_UNSET; |
4b06c409 | 2046 | bool can_set_name; |
6880b25d KS |
2047 | |
2048 | if (rules->tokens == NULL) | |
2049 | return -1; | |
2050 | ||
4b06c409 | 2051 | can_set_name = ((strcmp(udev_device_get_action(event->dev), "remove") != 0) && |
00f98bd2 | 2052 | (major(udev_device_get_devnum(event->dev)) > 0 || |
ff0e1f4e | 2053 | udev_device_get_ifindex(event->dev) > 0)); |
00f98bd2 | 2054 | |
6880b25d KS |
2055 | /* loop through token list, match, run actions or forward to next rule */ |
2056 | cur = &rules->tokens[0]; | |
34d6a259 | 2057 | rule = cur; |
761dfddc | 2058 | for (;;) { |
6880b25d KS |
2059 | dump_token(rules, cur); |
2060 | switch (cur->type) { | |
2061 | case TK_RULE: | |
2062 | /* current rule */ | |
2063 | rule = cur; | |
00f98bd2 | 2064 | /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */ |
761dfddc | 2065 | if (!can_set_name && rule->rule.can_set_name) |
0c057e9c | 2066 | goto nomatch; |
6880b25d KS |
2067 | esc = ESCAPE_UNSET; |
2068 | break; | |
6880b25d KS |
2069 | case TK_M_ACTION: |
2070 | if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0) | |
2071 | goto nomatch; | |
2072 | break; | |
2073 | case TK_M_DEVPATH: | |
2074 | if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0) | |
2075 | goto nomatch; | |
2076 | break; | |
2077 | case TK_M_KERNEL: | |
2078 | if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0) | |
2079 | goto nomatch; | |
2080 | break; | |
38932b9f KS |
2081 | case TK_M_DEVLINK: { |
2082 | size_t devlen = strlen(udev_get_dev_path(event->udev))+1; | |
2083 | struct udev_list_entry *list_entry; | |
2084 | bool match = false; | |
2085 | ||
2086 | udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) { | |
2087 | const char *devlink; | |
2088 | ||
2089 | devlink = &udev_list_entry_get_name(list_entry)[devlen]; | |
2090 | if (match_key(rules, cur, devlink) == 0) { | |
2091 | match = true; | |
2092 | break; | |
6880b25d | 2093 | } |
6880b25d | 2094 | } |
38932b9f KS |
2095 | if (!match) |
2096 | goto nomatch; | |
2097 | break; | |
2098 | } | |
6880b25d KS |
2099 | case TK_M_NAME: |
2100 | if (match_key(rules, cur, event->name) != 0) | |
2101 | goto nomatch; | |
2102 | break; | |
38932b9f KS |
2103 | case TK_M_ENV: { |
2104 | const char *key_name = &rules->buf[cur->key.attr_off]; | |
2105 | const char *value; | |
2106 | ||
2107 | value = udev_device_get_property_value(event->dev, key_name); | |
2108 | if (value == NULL) { | |
2109 | dbg(event->udev, "ENV{%s} is not set, treat as empty\n", key_name); | |
2110 | value = ""; | |
6880b25d | 2111 | } |
38932b9f KS |
2112 | if (match_key(rules, cur, value)) |
2113 | goto nomatch; | |
2114 | break; | |
2115 | } | |
2116 | case TK_M_TAG: { | |
2117 | struct udev_list_entry *list_entry; | |
2118 | bool match = false; | |
2119 | ||
2120 | udev_list_entry_foreach(list_entry, udev_device_get_tags_list_entry(event->dev)) { | |
2121 | if (strcmp(&rules->buf[cur->key.value_off], udev_list_entry_get_name(list_entry)) == 0) { | |
2122 | match = true; | |
2123 | break; | |
3f896a2a | 2124 | } |
3f896a2a | 2125 | } |
38932b9f KS |
2126 | if (!match && (cur->key.op != OP_NOMATCH)) |
2127 | goto nomatch; | |
2128 | break; | |
2129 | } | |
6880b25d KS |
2130 | case TK_M_SUBSYSTEM: |
2131 | if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0) | |
2132 | goto nomatch; | |
2133 | break; | |
2134 | case TK_M_DRIVER: | |
2135 | if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0) | |
2136 | goto nomatch; | |
2137 | break; | |
38932b9f KS |
2138 | case TK_M_WAITFOR: { |
2139 | char filename[UTIL_PATH_SIZE]; | |
2140 | int found; | |
2141 | ||
2142 | udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename)); | |
2143 | found = (wait_for_file(event->dev, filename, 10) == 0); | |
2144 | if (!found && (cur->key.op != OP_NOMATCH)) | |
2145 | goto nomatch; | |
2146 | break; | |
2147 | } | |
6880b25d KS |
2148 | case TK_M_ATTR: |
2149 | if (match_attr(rules, event->dev, event, cur) != 0) | |
2150 | goto nomatch; | |
2151 | break; | |
2152 | case TK_M_KERNELS: | |
2153 | case TK_M_SUBSYSTEMS: | |
2154 | case TK_M_DRIVERS: | |
7df0ed83 KS |
2155 | case TK_M_ATTRS: |
2156 | case TK_M_TAGS: { | |
38932b9f | 2157 | struct token *next; |
6880b25d | 2158 | |
38932b9f KS |
2159 | /* get whole sequence of parent matches */ |
2160 | next = cur; | |
2161 | while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX) | |
2162 | next++; | |
6880b25d | 2163 | |
38932b9f KS |
2164 | /* loop over parents */ |
2165 | event->dev_parent = event->dev; | |
2166 | for (;;) { | |
2167 | struct token *key; | |
2168 | ||
2169 | dbg(event->udev, "parent: '%s'\n", udev_device_get_syspath(event->dev_parent)); | |
2170 | /* loop over sequence of parent match keys */ | |
2171 | for (key = cur; key < next; key++ ) { | |
2172 | dump_token(rules, key); | |
2173 | switch(key->type) { | |
2174 | case TK_M_KERNELS: | |
2175 | if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0) | |
2176 | goto try_parent; | |
2177 | break; | |
2178 | case TK_M_SUBSYSTEMS: | |
2179 | if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0) | |
2180 | goto try_parent; | |
2181 | break; | |
2182 | case TK_M_DRIVERS: | |
2183 | if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0) | |
2184 | goto try_parent; | |
2185 | break; | |
2186 | case TK_M_ATTRS: | |
2187 | if (match_attr(rules, event->dev_parent, event, key) != 0) | |
2188 | goto try_parent; | |
2189 | break; | |
7df0ed83 KS |
2190 | case TK_M_TAGS: { |
2191 | bool match = udev_device_has_tag(event->dev_parent, &rules->buf[cur->key.value_off]); | |
2192 | ||
2193 | if (match && key->key.op == OP_NOMATCH) | |
2194 | goto try_parent; | |
2195 | if (!match && key->key.op == OP_MATCH) | |
2196 | goto try_parent; | |
2197 | break; | |
2198 | } | |
38932b9f | 2199 | default: |
6880b25d | 2200 | goto nomatch; |
6880b25d | 2201 | } |
38932b9f | 2202 | dbg(event->udev, "parent key matched\n"); |
065db052 | 2203 | } |
38932b9f | 2204 | dbg(event->udev, "all parent keys matched\n"); |
6880b25d | 2205 | break; |
38932b9f KS |
2206 | |
2207 | try_parent: | |
2208 | event->dev_parent = udev_device_get_parent(event->dev_parent); | |
2209 | if (event->dev_parent == NULL) | |
2210 | goto nomatch; | |
2211 | } | |
2212 | /* move behind our sequence of parent match keys */ | |
2213 | cur = next; | |
2214 | continue; | |
2215 | } | |
2216 | case TK_M_TEST: { | |
2217 | char filename[UTIL_PATH_SIZE]; | |
2218 | struct stat statbuf; | |
2219 | int match; | |
2220 | ||
2221 | udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename)); | |
2222 | if (util_resolve_subsys_kernel(event->udev, filename, filename, sizeof(filename), 0) != 0) { | |
2223 | if (filename[0] != '/') { | |
2224 | char tmp[UTIL_PATH_SIZE]; | |
2225 | ||
2226 | util_strscpy(tmp, sizeof(tmp), filename); | |
2227 | util_strscpyl(filename, sizeof(filename), | |
2228 | udev_device_get_syspath(event->dev), "/", tmp, NULL); | |
2229 | } | |
6880b25d | 2230 | } |
38932b9f KS |
2231 | attr_subst_subdir(filename, sizeof(filename)); |
2232 | ||
2233 | match = (stat(filename, &statbuf) == 0); | |
2234 | dbg(event->udev, "'%s' %s", filename, match ? "exists\n" : "does not exist\n"); | |
2235 | if (match && cur->key.mode > 0) { | |
2236 | match = ((statbuf.st_mode & cur->key.mode) > 0); | |
2237 | dbg(event->udev, "'%s' has mode=%#o and %s %#o\n", filename, statbuf.st_mode, | |
2238 | match ? "matches" : "does not match", cur->key.mode); | |
2239 | } | |
2240 | if (match && cur->key.op == OP_NOMATCH) | |
2241 | goto nomatch; | |
2242 | if (!match && cur->key.op == OP_MATCH) | |
2243 | goto nomatch; | |
2244 | break; | |
2245 | } | |
2181d30a KS |
2246 | case TK_M_EVENT_TIMEOUT: |
2247 | info(event->udev, "OPTIONS event_timeout=%u\n", cur->key.event_timeout); | |
2248 | event->timeout_usec = cur->key.event_timeout * 1000 * 1000; | |
2249 | break; | |
38932b9f KS |
2250 | case TK_M_PROGRAM: { |
2251 | char program[UTIL_PATH_SIZE]; | |
2252 | char **envp; | |
2253 | char result[UTIL_PATH_SIZE]; | |
2254 | ||
2255 | free(event->program_result); | |
2256 | event->program_result = NULL; | |
2257 | udev_event_apply_format(event, &rules->buf[cur->key.value_off], program, sizeof(program)); | |
2258 | envp = udev_device_get_properties_envp(event->dev); | |
2259 | info(event->udev, "PROGRAM '%s' %s:%u\n", | |
2260 | program, | |
2261 | &rules->buf[rule->rule.filename_off], | |
2262 | rule->rule.filename_line); | |
6880b25d | 2263 | |
38932b9f KS |
2264 | if (udev_event_spawn(event, program, envp, sigmask, result, sizeof(result)) < 0) { |
2265 | if (cur->key.op != OP_NOMATCH) | |
2266 | goto nomatch; | |
2267 | } else { | |
2268 | int count; | |
2269 | ||
2270 | util_remove_trailing_chars(result, '\n'); | |
2271 | if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) { | |
0bbe8838 | 2272 | count = util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT); |
38932b9f KS |
2273 | if (count > 0) |
2274 | info(event->udev, "%i character(s) replaced\n" , count); | |
6880b25d | 2275 | } |
38932b9f KS |
2276 | event->program_result = strdup(result); |
2277 | dbg(event->udev, "storing result '%s'\n", event->program_result); | |
2278 | if (cur->key.op == OP_NOMATCH) | |
2279 | goto nomatch; | |
6880b25d | 2280 | } |
38932b9f KS |
2281 | break; |
2282 | } | |
2283 | case TK_M_IMPORT_FILE: { | |
2284 | char import[UTIL_PATH_SIZE]; | |
6880b25d | 2285 | |
38932b9f KS |
2286 | udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import)); |
2287 | if (import_file_into_properties(event->dev, import) != 0) | |
2288 | if (cur->key.op != OP_NOMATCH) | |
2289 | goto nomatch; | |
2290 | break; | |
2291 | } | |
2292 | case TK_M_IMPORT_PROG: { | |
2293 | char import[UTIL_PATH_SIZE]; | |
5539f624 | 2294 | |
38932b9f KS |
2295 | udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import)); |
2296 | info(event->udev, "IMPORT '%s' %s:%u\n", | |
2297 | import, | |
2298 | &rules->buf[rule->rule.filename_off], | |
2299 | rule->rule.filename_line); | |
5539f624 | 2300 | |
38932b9f KS |
2301 | if (import_program_into_properties(event, import, sigmask) != 0) |
2302 | if (cur->key.op != OP_NOMATCH) | |
2303 | goto nomatch; | |
2304 | break; | |
2305 | } | |
d7867b31 | 2306 | case TK_M_IMPORT_BUILTIN: { |
0e2856a2 | 2307 | char command[UTIL_PATH_SIZE]; |
81dadce5 KS |
2308 | |
2309 | if (udev_builtin_run_once(cur->key.builtin_cmd)) { | |
2310 | /* check if we ran already */ | |
2311 | if (event->builtin_run & (1 << cur->key.builtin_cmd)) { | |
2312 | info(event->udev, "IMPORT builtin skip '%s' %s:%u\n", | |
2313 | udev_builtin_name(cur->key.builtin_cmd), | |
2314 | &rules->buf[rule->rule.filename_off], | |
2315 | rule->rule.filename_line); | |
2316 | /* return the result from earlier run */ | |
2317 | if (event->builtin_ret & (1 << cur->key.builtin_cmd)) | |
d7867b31 | 2318 | if (cur->key.op != OP_NOMATCH) |
81dadce5 KS |
2319 | goto nomatch; |
2320 | break; | |
2321 | } | |
2322 | /* mark as ran */ | |
2323 | event->builtin_run |= (1 << cur->key.builtin_cmd); | |
d7867b31 | 2324 | } |
0e2856a2 KS |
2325 | |
2326 | udev_event_apply_format(event, &rules->buf[cur->key.value_off], command, sizeof(command)); | |
d7867b31 KS |
2327 | info(event->udev, "IMPORT builtin '%s' %s:%u\n", |
2328 | udev_builtin_name(cur->key.builtin_cmd), | |
2329 | &rules->buf[rule->rule.filename_off], | |
2330 | rule->rule.filename_line); | |
0e2856a2 | 2331 | |
81dadce5 | 2332 | if (udev_builtin_run(event->dev, cur->key.builtin_cmd, command, false) != 0) { |
d7867b31 KS |
2333 | /* remember failure */ |
2334 | info(rules->udev, "IMPORT builtin '%s' returned non-zero\n", | |
2335 | udev_builtin_name(cur->key.builtin_cmd)); | |
2336 | event->builtin_ret |= (1 << cur->key.builtin_cmd); | |
2337 | if (cur->key.op != OP_NOMATCH) | |
2338 | goto nomatch; | |
2339 | } | |
2340 | break; | |
2341 | } | |
38932b9f KS |
2342 | case TK_M_IMPORT_DB: { |
2343 | const char *key = &rules->buf[cur->key.value_off]; | |
2344 | const char *value; | |
2345 | ||
2346 | value = udev_device_get_property_value(event->dev_db, key); | |
2347 | if (value != NULL) { | |
2348 | struct udev_list_entry *entry; | |
c4f6dcc4 | 2349 | |
38932b9f KS |
2350 | entry = udev_device_add_property(event->dev, key, value); |
2351 | udev_list_entry_set_num(entry, true); | |
2352 | } else { | |
2353 | if (cur->key.op != OP_NOMATCH) | |
2354 | goto nomatch; | |
2355 | } | |
2356 | break; | |
2357 | } | |
2358 | case TK_M_IMPORT_CMDLINE: { | |
2359 | FILE *f; | |
2360 | bool imported = false; | |
2361 | ||
2362 | f = fopen("/proc/cmdline", "r"); | |
2363 | if (f != NULL) { | |
2364 | char cmdline[4096]; | |
2365 | ||
2366 | if (fgets(cmdline, sizeof(cmdline), f) != NULL) { | |
2367 | const char *key = &rules->buf[cur->key.value_off]; | |
2368 | char *pos; | |
2369 | ||
2370 | pos = strstr(cmdline, key); | |
2371 | if (pos != NULL) { | |
2372 | struct udev_list_entry *entry; | |
2373 | ||
2374 | pos += strlen(key); | |
2375 | if (pos[0] == '\0' || isspace(pos[0])) { | |
2376 | /* we import simple flags as 'FLAG=1' */ | |
2377 | entry = udev_device_add_property(event->dev, key, "1"); | |
2378 | udev_list_entry_set_num(entry, true); | |
2379 | imported = true; | |
2380 | } else if (pos[0] == '=') { | |
2381 | const char *value; | |
2382 | ||
2383 | pos++; | |
2384 | value = pos; | |
2385 | while (pos[0] != '\0' && !isspace(pos[0])) | |
7d2b68b7 | 2386 | pos++; |
38932b9f KS |
2387 | pos[0] = '\0'; |
2388 | entry = udev_device_add_property(event->dev, key, value); | |
2389 | udev_list_entry_set_num(entry, true); | |
2390 | imported = true; | |
c4f6dcc4 KS |
2391 | } |
2392 | } | |
c4f6dcc4 | 2393 | } |
38932b9f | 2394 | fclose(f); |
c4f6dcc4 | 2395 | } |
38932b9f KS |
2396 | if (!imported && cur->key.op != OP_NOMATCH) |
2397 | goto nomatch; | |
2398 | break; | |
2399 | } | |
2400 | case TK_M_IMPORT_PARENT: { | |
2401 | char import[UTIL_PATH_SIZE]; | |
6880b25d | 2402 | |
38932b9f KS |
2403 | udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import)); |
2404 | if (import_parent_into_properties(event->dev, import) != 0) | |
2405 | if (cur->key.op != OP_NOMATCH) | |
2406 | goto nomatch; | |
2407 | break; | |
2408 | } | |
6880b25d KS |
2409 | case TK_M_RESULT: |
2410 | if (match_key(rules, cur, event->program_result) != 0) | |
2411 | goto nomatch; | |
2412 | break; | |
6880b25d KS |
2413 | case TK_A_STRING_ESCAPE_NONE: |
2414 | esc = ESCAPE_NONE; | |
2415 | break; | |
2416 | case TK_A_STRING_ESCAPE_REPLACE: | |
2417 | esc = ESCAPE_REPLACE; | |
2418 | break; | |
9ead6627 KS |
2419 | case TK_A_DB_PERSIST: |
2420 | udev_device_set_db_persist(event->dev); | |
2421 | break; | |
bd284db1 | 2422 | case TK_A_INOTIFY_WATCH: |
3b529da4 KS |
2423 | if (event->inotify_watch_final) |
2424 | break; | |
2425 | if (cur->key.op == OP_ASSIGN_FINAL) | |
2426 | event->inotify_watch_final = true; | |
46f194cb | 2427 | event->inotify_watch = cur->key.watch; |
bd284db1 | 2428 | break; |
6880b25d KS |
2429 | case TK_A_DEVLINK_PRIO: |
2430 | udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio); | |
2431 | break; | |
38932b9f KS |
2432 | case TK_A_OWNER: { |
2433 | char owner[UTIL_NAME_SIZE]; | |
6880b25d | 2434 | |
38932b9f | 2435 | if (event->owner_final) |
6880b25d | 2436 | break; |
38932b9f KS |
2437 | if (cur->key.op == OP_ASSIGN_FINAL) |
2438 | event->owner_final = true; | |
2439 | udev_event_apply_format(event, &rules->buf[cur->key.value_off], owner, sizeof(owner)); | |
2440 | event->uid = util_lookup_user(event->udev, owner); | |
2441 | info(event->udev, "OWNER %u %s:%u\n", | |
2442 | event->uid, | |
2443 | &rules->buf[rule->rule.filename_off], | |
2444 | rule->rule.filename_line); | |
2445 | break; | |
2446 | } | |
2447 | case TK_A_GROUP: { | |
2448 | char group[UTIL_NAME_SIZE]; | |
6880b25d | 2449 | |
38932b9f | 2450 | if (event->group_final) |
6880b25d | 2451 | break; |
38932b9f KS |
2452 | if (cur->key.op == OP_ASSIGN_FINAL) |
2453 | event->group_final = true; | |
2454 | udev_event_apply_format(event, &rules->buf[cur->key.value_off], group, sizeof(group)); | |
2455 | event->gid = util_lookup_group(event->udev, group); | |
2456 | info(event->udev, "GROUP %u %s:%u\n", | |
2457 | event->gid, | |
2458 | &rules->buf[rule->rule.filename_off], | |
2459 | rule->rule.filename_line); | |
2460 | break; | |
2461 | } | |
2462 | case TK_A_MODE: { | |
2463 | char mode_str[UTIL_NAME_SIZE]; | |
2464 | mode_t mode; | |
2465 | char *endptr; | |
6880b25d | 2466 | |
38932b9f KS |
2467 | if (event->mode_final) |
2468 | break; | |
2469 | udev_event_apply_format(event, &rules->buf[cur->key.value_off], mode_str, sizeof(mode_str)); | |
2470 | mode = strtol(mode_str, &endptr, 8); | |
2471 | if (endptr[0] != '\0') { | |
2472 | err(event->udev, "ignoring invalid mode '%s'\n", mode_str); | |
6880b25d KS |
2473 | break; |
2474 | } | |
38932b9f KS |
2475 | if (cur->key.op == OP_ASSIGN_FINAL) |
2476 | event->mode_final = true; | |
2477 | event->mode_set = true; | |
2478 | event->mode = mode; | |
2479 | info(event->udev, "MODE %#o %s:%u\n", | |
2480 | event->mode, | |
2481 | &rules->buf[rule->rule.filename_off], | |
2482 | rule->rule.filename_line); | |
2483 | break; | |
2484 | } | |
6880b25d KS |
2485 | case TK_A_OWNER_ID: |
2486 | if (event->owner_final) | |
2487 | break; | |
b0f7409f | 2488 | if (cur->key.op == OP_ASSIGN_FINAL) |
761dfddc | 2489 | event->owner_final = true; |
6880b25d | 2490 | event->uid = cur->key.uid; |
0ef254d5 KS |
2491 | info(event->udev, "OWNER %u %s:%u\n", |
2492 | event->uid, | |
2493 | &rules->buf[rule->rule.filename_off], | |
2494 | rule->rule.filename_line); | |
6880b25d KS |
2495 | break; |
2496 | case TK_A_GROUP_ID: | |
2497 | if (event->group_final) | |
2498 | break; | |
b0f7409f | 2499 | if (cur->key.op == OP_ASSIGN_FINAL) |
761dfddc | 2500 | event->group_final = true; |
6880b25d | 2501 | event->gid = cur->key.gid; |
0ef254d5 KS |
2502 | info(event->udev, "GROUP %u %s:%u\n", |
2503 | event->gid, | |
2504 | &rules->buf[rule->rule.filename_off], | |
2505 | rule->rule.filename_line); | |
6880b25d KS |
2506 | break; |
2507 | case TK_A_MODE_ID: | |
2508 | if (event->mode_final) | |
2509 | break; | |
b0f7409f | 2510 | if (cur->key.op == OP_ASSIGN_FINAL) |
761dfddc | 2511 | event->mode_final = true; |
3cf1a8e3 | 2512 | event->mode_set = true; |
6880b25d | 2513 | event->mode = cur->key.mode; |
0ef254d5 KS |
2514 | info(event->udev, "MODE %#o %s:%u\n", |
2515 | event->mode, | |
2516 | &rules->buf[rule->rule.filename_off], | |
2517 | rule->rule.filename_line); | |
6880b25d | 2518 | break; |
761dfddc | 2519 | case TK_A_STATIC_NODE: |
79449642 | 2520 | event->static_node = true; |
761dfddc | 2521 | break; |
38932b9f KS |
2522 | case TK_A_ENV: { |
2523 | const char *name = &rules->buf[cur->key.attr_off]; | |
2524 | char *value = &rules->buf[cur->key.value_off]; | |
2525 | ||
2526 | if (value[0] != '\0') { | |
2527 | char temp_value[UTIL_NAME_SIZE]; | |
2528 | struct udev_list_entry *entry; | |
2529 | ||
2530 | udev_event_apply_format(event, value, temp_value, sizeof(temp_value)); | |
2531 | entry = udev_device_add_property(event->dev, name, temp_value); | |
2532 | /* store in db, skip private keys */ | |
2533 | if (name[0] != '.') | |
2534 | udev_list_entry_set_num(entry, true); | |
2535 | } else { | |
2536 | udev_device_add_property(event->dev, name, NULL); | |
6880b25d | 2537 | } |
38932b9f KS |
2538 | break; |
2539 | } | |
1eb037a7 KS |
2540 | case TK_A_TAG: { |
2541 | char tag[UTIL_PATH_SIZE]; | |
705a165d | 2542 | const char *p; |
1eb037a7 KS |
2543 | |
2544 | udev_event_apply_format(event, &rules->buf[cur->key.value_off], tag, sizeof(tag)); | |
1dbfbfbe KS |
2545 | if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL) |
2546 | udev_device_cleanup_tags_list(event->dev); | |
705a165d KS |
2547 | for (p = tag; *p != '\0'; p++) { |
2548 | if ((*p >= 'a' && *p <= 'z') || | |
2549 | (*p >= 'A' && *p <= 'Z') || | |
2550 | (*p >= '0' && *p <= '9') || | |
2551 | *p == '-' || *p == '_') | |
2552 | continue; | |
2553 | err(event->udev, "ignoring invalid tag name '%s'\n", tag); | |
2554 | break; | |
2555 | } | |
1eb037a7 | 2556 | udev_device_add_tag(event->dev, tag); |
28460195 | 2557 | break; |
1eb037a7 | 2558 | } |
38932b9f KS |
2559 | case TK_A_NAME: { |
2560 | const char *name = &rules->buf[cur->key.value_off]; | |
2561 | char name_str[UTIL_PATH_SIZE]; | |
2562 | int count; | |
6880b25d | 2563 | |
38932b9f | 2564 | if (event->name_final) |
6880b25d | 2565 | break; |
38932b9f KS |
2566 | if (cur->key.op == OP_ASSIGN_FINAL) |
2567 | event->name_final = true; | |
2568 | udev_event_apply_format(event, name, name_str, sizeof(name_str)); | |
2569 | if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) { | |
0bbe8838 | 2570 | count = util_replace_chars(name_str, "/"); |
6880b25d | 2571 | if (count > 0) |
38932b9f | 2572 | info(event->udev, "%i character(s) replaced\n", count); |
6880b25d | 2573 | } |
38932b9f KS |
2574 | free(event->name); |
2575 | event->name = strdup(name_str); | |
2576 | info(event->udev, "NAME '%s' %s:%u\n", | |
2577 | event->name, | |
2578 | &rules->buf[rule->rule.filename_off], | |
2579 | rule->rule.filename_line); | |
6880b25d | 2580 | break; |
38932b9f KS |
2581 | } |
2582 | case TK_A_DEVLINK: { | |
2583 | char temp[UTIL_PATH_SIZE]; | |
2584 | char filename[UTIL_PATH_SIZE]; | |
2585 | char *pos, *next; | |
2586 | int count = 0; | |
2587 | ||
2588 | if (event->devlink_final) | |
6880b25d | 2589 | break; |
38932b9f | 2590 | if (major(udev_device_get_devnum(event->dev)) == 0) |
6880b25d | 2591 | break; |
38932b9f KS |
2592 | if (cur->key.op == OP_ASSIGN_FINAL) |
2593 | event->devlink_final = true; | |
2594 | if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL) | |
2595 | udev_device_cleanup_devlinks_list(event->dev); | |
2596 | ||
2597 | /* allow multiple symlinks separated by spaces */ | |
2598 | udev_event_apply_format(event, &rules->buf[cur->key.value_off], temp, sizeof(temp)); | |
2599 | if (esc == ESCAPE_UNSET) | |
0bbe8838 | 2600 | count = util_replace_chars(temp, "/ "); |
38932b9f | 2601 | else if (esc == ESCAPE_REPLACE) |
0bbe8838 | 2602 | count = util_replace_chars(temp, "/"); |
38932b9f KS |
2603 | if (count > 0) |
2604 | info(event->udev, "%i character(s) replaced\n" , count); | |
2605 | dbg(event->udev, "rule applied, added symlink(s) '%s'\n", temp); | |
2606 | pos = temp; | |
2607 | while (isspace(pos[0])) | |
2608 | pos++; | |
2609 | next = strchr(pos, ' '); | |
2610 | while (next != NULL) { | |
2611 | next[0] = '\0'; | |
2612 | info(event->udev, "LINK '%s' %s:%u\n", pos, | |
2613 | &rules->buf[rule->rule.filename_off], rule->rule.filename_line); | |
2614 | util_strscpyl(filename, sizeof(filename), udev_get_dev_path(event->udev), "/", pos, NULL); | |
2615 | udev_device_add_devlink(event->dev, filename, cur->key.devlink_unique); | |
2616 | while (isspace(next[1])) | |
2617 | next++; | |
2618 | pos = &next[1]; | |
2619 | next = strchr(pos, ' '); | |
2620 | } | |
2621 | if (pos[0] != '\0') { | |
2622 | info(event->udev, "LINK '%s' %s:%u\n", pos, | |
2623 | &rules->buf[rule->rule.filename_off], rule->rule.filename_line); | |
2624 | util_strscpyl(filename, sizeof(filename), udev_get_dev_path(event->udev), "/", pos, NULL); | |
2625 | udev_device_add_devlink(event->dev, filename, cur->key.devlink_unique); | |
2626 | } | |
2627 | break; | |
2628 | } | |
2629 | case TK_A_ATTR: { | |
2630 | const char *key_name = &rules->buf[cur->key.attr_off]; | |
2631 | char attr[UTIL_PATH_SIZE]; | |
2632 | char value[UTIL_NAME_SIZE]; | |
2633 | FILE *f; | |
2634 | ||
2635 | if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0) | |
2636 | util_strscpyl(attr, sizeof(attr), udev_device_get_syspath(event->dev), "/", key_name, NULL); | |
2637 | attr_subst_subdir(attr, sizeof(attr)); | |
2638 | ||
2639 | udev_event_apply_format(event, &rules->buf[cur->key.value_off], value, sizeof(value)); | |
2640 | info(event->udev, "ATTR '%s' writing '%s' %s:%u\n", attr, value, | |
2641 | &rules->buf[rule->rule.filename_off], | |
2642 | rule->rule.filename_line); | |
2643 | f = fopen(attr, "w"); | |
2644 | if (f != NULL) { | |
2645 | if (fprintf(f, "%s", value) <= 0) | |
2646 | err(event->udev, "error writing ATTR{%s}: %m\n", attr); | |
2647 | fclose(f); | |
2648 | } else { | |
2649 | err(event->udev, "error opening ATTR{%s} for writing: %m\n", attr); | |
6880b25d | 2650 | } |
38932b9f KS |
2651 | break; |
2652 | } | |
2653 | case TK_A_RUN: { | |
38932b9f | 2654 | if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL) |
869c9031 | 2655 | udev_list_cleanup(&event->run_list); |
38932b9f KS |
2656 | info(event->udev, "RUN '%s' %s:%u\n", |
2657 | &rules->buf[cur->key.value_off], | |
2658 | &rules->buf[rule->rule.filename_off], | |
2659 | rule->rule.filename_line); | |
289a1821 | 2660 | udev_list_entry_add(&event->run_list, &rules->buf[cur->key.value_off], NULL); |
38932b9f KS |
2661 | break; |
2662 | } | |
6880b25d | 2663 | case TK_A_GOTO: |
0c377989 KS |
2664 | if (cur->key.rule_goto == 0) |
2665 | break; | |
6880b25d KS |
2666 | cur = &rules->tokens[cur->key.rule_goto]; |
2667 | continue; | |
6270756c | 2668 | case TK_END: |
11ae7578 | 2669 | return 0; |
6880b25d | 2670 | |
d15fcce4 | 2671 | case TK_M_PARENTS_MIN: |
b0f7409f | 2672 | case TK_M_PARENTS_MAX: |
ac218d9c | 2673 | case TK_M_MAX: |
ac218d9c | 2674 | case TK_UNSET: |
6880b25d KS |
2675 | err(rules->udev, "wrong type %u\n", cur->type); |
2676 | goto nomatch; | |
2677 | } | |
2678 | ||
2679 | cur++; | |
2680 | continue; | |
2681 | nomatch: | |
2682 | /* fast-forward to next rule */ | |
3f3aa9f5 AJ |
2683 | cur = rule + rule->rule.token_count; |
2684 | dbg(rules->udev, "forward to rule: %u\n", | |
2685 | (unsigned int) (cur - rules->tokens)); | |
6880b25d | 2686 | } |
6880b25d | 2687 | } |
761dfddc KS |
2688 | |
2689 | void udev_rules_apply_static_dev_perms(struct udev_rules *rules) | |
2690 | { | |
2691 | struct token *cur; | |
2692 | struct token *rule; | |
2693 | uid_t uid = 0; | |
2694 | gid_t gid = 0; | |
2695 | mode_t mode = 0; | |
2696 | ||
2697 | if (rules->tokens == NULL) | |
2698 | return; | |
2699 | ||
2700 | cur = &rules->tokens[0]; | |
2701 | rule = cur; | |
2702 | for (;;) { | |
2703 | switch (cur->type) { | |
2704 | case TK_RULE: | |
2705 | /* current rule */ | |
2706 | rule = cur; | |
2707 | ||
2708 | /* skip rules without a static_node tag */ | |
2709 | if (!rule->rule.has_static_node) | |
2710 | goto next; | |
2711 | ||
2712 | uid = 0; | |
2713 | gid = 0; | |
2714 | mode = 0; | |
2715 | break; | |
2716 | case TK_A_OWNER_ID: | |
2717 | uid = cur->key.uid; | |
2718 | break; | |
2719 | case TK_A_GROUP_ID: | |
2720 | gid = cur->key.gid; | |
2721 | break; | |
2722 | case TK_A_MODE_ID: | |
2723 | mode = cur->key.mode; | |
2724 | break; | |
2725 | case TK_A_STATIC_NODE: { | |
2726 | char filename[UTIL_PATH_SIZE]; | |
2727 | struct stat stats; | |
c112873b | 2728 | |
761dfddc | 2729 | /* we assure, that the permissions tokens are sorted before the static token */ |
36acdbcc | 2730 | if (mode == 0 && uid == 0 && gid == 0) |
761dfddc KS |
2731 | goto next; |
2732 | util_strscpyl(filename, sizeof(filename), udev_get_dev_path(rules->udev), "/", | |
2733 | &rules->buf[cur->key.value_off], NULL); | |
2734 | if (stat(filename, &stats) != 0) | |
2735 | goto next; | |
2736 | if (!S_ISBLK(stats.st_mode) && !S_ISCHR(stats.st_mode)) | |
2737 | goto next; | |
79449642 KS |
2738 | if (mode == 0) { |
2739 | if (gid > 0) | |
2740 | mode = 0660; | |
2741 | else | |
2742 | mode = 0600; | |
2743 | } | |
2744 | /* set sticky bit, so we do not remove the node on module unload */ | |
2745 | mode |= 01000; | |
2746 | if (mode != (stats.st_mode & 01777)) { | |
761dfddc KS |
2747 | chmod(filename, mode); |
2748 | info(rules->udev, "chmod '%s' %#o\n", filename, mode); | |
2749 | } | |
c112873b | 2750 | |
761dfddc KS |
2751 | if ((uid != 0 && uid != stats.st_uid) || (gid != 0 && gid != stats.st_gid)) { |
2752 | chown(filename, uid, gid); | |
2753 | info(rules->udev, "chown '%s' %u %u\n", filename, uid, gid); | |
2754 | } | |
c112873b | 2755 | |
761dfddc KS |
2756 | utimensat(AT_FDCWD, filename, NULL, 0); |
2757 | break; | |
2758 | } | |
2759 | case TK_END: | |
2760 | return; | |
2761 | } | |
2762 | ||
2763 | cur++; | |
2764 | continue; | |
2765 | next: | |
2766 | /* fast-forward to next rule */ | |
2767 | cur = rule + rule->rule.token_count; | |
2768 | continue; | |
2769 | } | |
2770 | } |