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udev: initialize rules dir timestamps when reading rules
[thirdparty/systemd.git] / src / udev / udev-rules.c
1 /*
2 * Copyright (C) 2003-2010 Kay Sievers <kay.sievers@vrfy.org>
3 * Copyright (C) 2008 Alan Jenkins <alan-jenkins@tuffmail.co.uk>
4 *
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.
9 *
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.
14 *
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/>.
17 */
18
19 #include <stddef.h>
20 #include <limits.h>
21 #include <stdlib.h>
22 #include <stdbool.h>
23 #include <string.h>
24 #include <stdio.h>
25 #include <fcntl.h>
26 #include <ctype.h>
27 #include <unistd.h>
28 #include <errno.h>
29 #include <dirent.h>
30 #include <fnmatch.h>
31 #include <time.h>
32
33 #include "udev.h"
34 #include "path-util.h"
35 #include "conf-files.h"
36
37 #define PREALLOC_TOKEN 2048
38 #define PREALLOC_STRBUF 32 * 1024
39 #define PREALLOC_TRIE 256
40
41 struct uid_gid {
42 unsigned int name_off;
43 union {
44 uid_t uid;
45 gid_t gid;
46 };
47 };
48
49 struct trie_node {
50 /* this node's first child */
51 unsigned int child_idx;
52 /* the next child of our parent node's child list */
53 unsigned int next_child_idx;
54 /* this node's last child (shortcut for append) */
55 unsigned int last_child_idx;
56 unsigned int value_off;
57 unsigned short value_len;
58 unsigned char key;
59 };
60
61 struct udev_rules {
62 struct udev *udev;
63 char **dirs;
64 unsigned long long *dirs_ts_usec;
65 int resolve_names;
66
67 /* every key in the rules file becomes a token */
68 struct token *tokens;
69 unsigned int token_cur;
70 unsigned int token_max;
71
72 /* all key strings are copied to a single string buffer */
73 char *buf;
74 size_t buf_cur;
75 size_t buf_max;
76 unsigned int buf_count;
77
78 /* during rule parsing, strings are indexed and de-duplicated */
79 struct trie_node *trie_nodes;
80 unsigned int trie_nodes_cur;
81 unsigned int trie_nodes_max;
82
83 /* during rule parsing, uid/gid lookup results are cached */
84 struct uid_gid *uids;
85 unsigned int uids_cur;
86 unsigned int uids_max;
87 struct uid_gid *gids;
88 unsigned int gids_cur;
89 unsigned int gids_max;
90 };
91
92 /* KEY=="", KEY!="", KEY+="", KEY="", KEY:="" */
93 enum operation_type {
94 OP_UNSET,
95
96 OP_MATCH,
97 OP_NOMATCH,
98 OP_MATCH_MAX,
99
100 OP_ADD,
101 OP_ASSIGN,
102 OP_ASSIGN_FINAL,
103 };
104
105 enum string_glob_type {
106 GL_UNSET,
107 GL_PLAIN, /* no special chars */
108 GL_GLOB, /* shell globs ?,*,[] */
109 GL_SPLIT, /* multi-value A|B */
110 GL_SPLIT_GLOB, /* multi-value with glob A*|B* */
111 GL_SOMETHING, /* commonly used "?*" */
112 };
113
114 enum string_subst_type {
115 SB_UNSET,
116 SB_NONE,
117 SB_FORMAT,
118 SB_SUBSYS,
119 };
120
121 /* tokens of a rule are sorted/handled in this order */
122 enum token_type {
123 TK_UNSET,
124 TK_RULE,
125
126 TK_M_ACTION, /* val */
127 TK_M_DEVPATH, /* val */
128 TK_M_KERNEL, /* val */
129 TK_M_DEVLINK, /* val */
130 TK_M_NAME, /* val */
131 TK_M_ENV, /* val, attr */
132 TK_M_TAG, /* val */
133 TK_M_SUBSYSTEM, /* val */
134 TK_M_DRIVER, /* val */
135 TK_M_WAITFOR, /* val */
136 TK_M_ATTR, /* val, attr */
137
138 TK_M_PARENTS_MIN,
139 TK_M_KERNELS, /* val */
140 TK_M_SUBSYSTEMS, /* val */
141 TK_M_DRIVERS, /* val */
142 TK_M_ATTRS, /* val, attr */
143 TK_M_TAGS, /* val */
144 TK_M_PARENTS_MAX,
145
146 TK_M_TEST, /* val, mode_t */
147 TK_M_EVENT_TIMEOUT, /* int */
148 TK_M_PROGRAM, /* val */
149 TK_M_IMPORT_FILE, /* val */
150 TK_M_IMPORT_PROG, /* val */
151 TK_M_IMPORT_BUILTIN, /* val */
152 TK_M_IMPORT_DB, /* val */
153 TK_M_IMPORT_CMDLINE, /* val */
154 TK_M_IMPORT_PARENT, /* val */
155 TK_M_RESULT, /* val */
156 TK_M_MAX,
157
158 TK_A_STRING_ESCAPE_NONE,
159 TK_A_STRING_ESCAPE_REPLACE,
160 TK_A_DB_PERSIST,
161 TK_A_INOTIFY_WATCH, /* int */
162 TK_A_DEVLINK_PRIO, /* int */
163 TK_A_OWNER, /* val */
164 TK_A_GROUP, /* val */
165 TK_A_MODE, /* val */
166 TK_A_OWNER_ID, /* uid_t */
167 TK_A_GROUP_ID, /* gid_t */
168 TK_A_MODE_ID, /* mode_t */
169 TK_A_STATIC_NODE, /* val */
170 TK_A_ENV, /* val, attr */
171 TK_A_TAG, /* val */
172 TK_A_NAME, /* val */
173 TK_A_DEVLINK, /* val */
174 TK_A_ATTR, /* val, attr */
175 TK_A_RUN_BUILTIN, /* val, bool */
176 TK_A_RUN_PROGRAM, /* val, bool */
177 TK_A_GOTO, /* size_t */
178
179 TK_END,
180 };
181
182 /* we try to pack stuff in a way that we take only 12 bytes per token */
183 struct token {
184 union {
185 unsigned char type; /* same in rule and key */
186 struct {
187 enum token_type type:8;
188 bool can_set_name:1;
189 bool has_static_node:1;
190 unsigned int unused:6;
191 unsigned short token_count;
192 unsigned int label_off;
193 unsigned short filename_off;
194 unsigned short filename_line;
195 } rule;
196 struct {
197 enum token_type type:8;
198 enum operation_type op:8;
199 enum string_glob_type glob:8;
200 enum string_subst_type subst:4;
201 enum string_subst_type attrsubst:4;
202 unsigned int value_off;
203 union {
204 unsigned int attr_off;
205 int devlink_unique;
206 unsigned int rule_goto;
207 mode_t mode;
208 uid_t uid;
209 gid_t gid;
210 int devlink_prio;
211 int event_timeout;
212 int watch;
213 enum udev_builtin_cmd builtin_cmd;
214 };
215 } key;
216 };
217 };
218
219 #define MAX_TK 64
220 struct rule_tmp {
221 struct udev_rules *rules;
222 struct token rule;
223 struct token token[MAX_TK];
224 unsigned int token_cur;
225 };
226
227 #ifdef DEBUG
228 static const char *operation_str(enum operation_type type)
229 {
230 static const char *operation_strs[] = {
231 [OP_UNSET] = "UNSET",
232 [OP_MATCH] = "match",
233 [OP_NOMATCH] = "nomatch",
234 [OP_MATCH_MAX] = "MATCH_MAX",
235
236 [OP_ADD] = "add",
237 [OP_ASSIGN] = "assign",
238 [OP_ASSIGN_FINAL] = "assign-final",
239 } ;
240
241 return operation_strs[type];
242 }
243
244 static const char *string_glob_str(enum string_glob_type type)
245 {
246 static const char *string_glob_strs[] = {
247 [GL_UNSET] = "UNSET",
248 [GL_PLAIN] = "plain",
249 [GL_GLOB] = "glob",
250 [GL_SPLIT] = "split",
251 [GL_SPLIT_GLOB] = "split-glob",
252 [GL_SOMETHING] = "split-glob",
253 };
254
255 return string_glob_strs[type];
256 }
257
258 static const char *token_str(enum token_type type)
259 {
260 static const char *token_strs[] = {
261 [TK_UNSET] = "UNSET",
262 [TK_RULE] = "RULE",
263
264 [TK_M_ACTION] = "M ACTION",
265 [TK_M_DEVPATH] = "M DEVPATH",
266 [TK_M_KERNEL] = "M KERNEL",
267 [TK_M_DEVLINK] = "M DEVLINK",
268 [TK_M_NAME] = "M NAME",
269 [TK_M_ENV] = "M ENV",
270 [TK_M_TAG] = "M TAG",
271 [TK_M_SUBSYSTEM] = "M SUBSYSTEM",
272 [TK_M_DRIVER] = "M DRIVER",
273 [TK_M_WAITFOR] = "M WAITFOR",
274 [TK_M_ATTR] = "M ATTR",
275
276 [TK_M_PARENTS_MIN] = "M PARENTS_MIN",
277 [TK_M_KERNELS] = "M KERNELS",
278 [TK_M_SUBSYSTEMS] = "M SUBSYSTEMS",
279 [TK_M_DRIVERS] = "M DRIVERS",
280 [TK_M_ATTRS] = "M ATTRS",
281 [TK_M_TAGS] = "M TAGS",
282 [TK_M_PARENTS_MAX] = "M PARENTS_MAX",
283
284 [TK_M_TEST] = "M TEST",
285 [TK_M_EVENT_TIMEOUT] = "M EVENT_TIMEOUT",
286 [TK_M_PROGRAM] = "M PROGRAM",
287 [TK_M_IMPORT_FILE] = "M IMPORT_FILE",
288 [TK_M_IMPORT_PROG] = "M IMPORT_PROG",
289 [TK_M_IMPORT_BUILTIN] = "M IMPORT_BUILTIN",
290 [TK_M_IMPORT_DB] = "M IMPORT_DB",
291 [TK_M_IMPORT_CMDLINE] = "M IMPORT_CMDLINE",
292 [TK_M_IMPORT_PARENT] = "M IMPORT_PARENT",
293 [TK_M_RESULT] = "M RESULT",
294 [TK_M_MAX] = "M MAX",
295
296 [TK_A_STRING_ESCAPE_NONE] = "A STRING_ESCAPE_NONE",
297 [TK_A_STRING_ESCAPE_REPLACE] = "A STRING_ESCAPE_REPLACE",
298 [TK_A_DB_PERSIST] = "A DB_PERSIST",
299 [TK_A_INOTIFY_WATCH] = "A INOTIFY_WATCH",
300 [TK_A_DEVLINK_PRIO] = "A DEVLINK_PRIO",
301 [TK_A_OWNER] = "A OWNER",
302 [TK_A_GROUP] = "A GROUP",
303 [TK_A_MODE] = "A MODE",
304 [TK_A_OWNER_ID] = "A OWNER_ID",
305 [TK_A_GROUP_ID] = "A GROUP_ID",
306 [TK_A_STATIC_NODE] = "A STATIC_NODE",
307 [TK_A_MODE_ID] = "A MODE_ID",
308 [TK_A_ENV] = "A ENV",
309 [TK_A_TAG] = "A ENV",
310 [TK_A_NAME] = "A NAME",
311 [TK_A_DEVLINK] = "A DEVLINK",
312 [TK_A_ATTR] = "A ATTR",
313 [TK_A_RUN_BUILTIN] = "A RUN_BUILTIN",
314 [TK_A_RUN_PROGRAM] = "A RUN_PROGRAM",
315 [TK_A_GOTO] = "A GOTO",
316
317 [TK_END] = "END",
318 };
319
320 return token_strs[type];
321 }
322
323 static void dump_token(struct udev_rules *rules, struct token *token)
324 {
325 enum token_type type = token->type;
326 enum operation_type op = token->key.op;
327 enum string_glob_type glob = token->key.glob;
328 const char *value = &rules->buf[token->key.value_off];
329 const char *attr = &rules->buf[token->key.attr_off];
330
331 switch (type) {
332 case TK_RULE:
333 {
334 const char *tks_ptr = (char *)rules->tokens;
335 const char *tk_ptr = (char *)token;
336 unsigned int idx = (tk_ptr - tks_ptr) / sizeof(struct token);
337
338 log_debug("* RULE %s:%u, token: %u, count: %u, label: '%s'\n",
339 &rules->buf[token->rule.filename_off], token->rule.filename_line,
340 idx, token->rule.token_count,
341 &rules->buf[token->rule.label_off]);
342 break;
343 }
344 case TK_M_ACTION:
345 case TK_M_DEVPATH:
346 case TK_M_KERNEL:
347 case TK_M_SUBSYSTEM:
348 case TK_M_DRIVER:
349 case TK_M_WAITFOR:
350 case TK_M_DEVLINK:
351 case TK_M_NAME:
352 case TK_M_KERNELS:
353 case TK_M_SUBSYSTEMS:
354 case TK_M_DRIVERS:
355 case TK_M_TAGS:
356 case TK_M_PROGRAM:
357 case TK_M_IMPORT_FILE:
358 case TK_M_IMPORT_PROG:
359 case TK_M_IMPORT_DB:
360 case TK_M_IMPORT_CMDLINE:
361 case TK_M_IMPORT_PARENT:
362 case TK_M_RESULT:
363 case TK_A_NAME:
364 case TK_A_DEVLINK:
365 case TK_A_OWNER:
366 case TK_A_GROUP:
367 case TK_A_MODE:
368 case TK_A_RUN_BUILTIN:
369 case TK_A_RUN_PROGRAM:
370 log_debug("%s %s '%s'(%s)\n",
371 token_str(type), operation_str(op), value, string_glob_str(glob));
372 break;
373 case TK_M_IMPORT_BUILTIN:
374 log_debug("%s %i '%s'\n", token_str(type), token->key.builtin_cmd, value);
375 break;
376 case TK_M_ATTR:
377 case TK_M_ATTRS:
378 case TK_M_ENV:
379 case TK_A_ATTR:
380 case TK_A_ENV:
381 log_debug("%s %s '%s' '%s'(%s)\n",
382 token_str(type), operation_str(op), attr, value, string_glob_str(glob));
383 break;
384 case TK_M_TAG:
385 case TK_A_TAG:
386 log_debug("%s %s '%s'\n", token_str(type), operation_str(op), value);
387 break;
388 case TK_A_STRING_ESCAPE_NONE:
389 case TK_A_STRING_ESCAPE_REPLACE:
390 case TK_A_DB_PERSIST:
391 log_debug("%s\n", token_str(type));
392 break;
393 case TK_M_TEST:
394 log_debug("%s %s '%s'(%s) %#o\n",
395 token_str(type), operation_str(op), value, string_glob_str(glob), token->key.mode);
396 break;
397 case TK_A_INOTIFY_WATCH:
398 log_debug("%s %u\n", token_str(type), token->key.watch);
399 break;
400 case TK_A_DEVLINK_PRIO:
401 log_debug("%s %u\n", token_str(type), token->key.devlink_prio);
402 break;
403 case TK_A_OWNER_ID:
404 log_debug("%s %s %u\n", token_str(type), operation_str(op), token->key.uid);
405 break;
406 case TK_A_GROUP_ID:
407 log_debug("%s %s %u\n", token_str(type), operation_str(op), token->key.gid);
408 break;
409 case TK_A_MODE_ID:
410 log_debug("%s %s %#o\n", token_str(type), operation_str(op), token->key.mode);
411 break;
412 case TK_A_STATIC_NODE:
413 log_debug("%s '%s'\n", token_str(type), value);
414 break;
415 case TK_M_EVENT_TIMEOUT:
416 log_debug("%s %u\n", token_str(type), token->key.event_timeout);
417 break;
418 case TK_A_GOTO:
419 log_debug("%s '%s' %u\n", token_str(type), value, token->key.rule_goto);
420 break;
421 case TK_END:
422 log_debug("* %s\n", token_str(type));
423 break;
424 case TK_M_PARENTS_MIN:
425 case TK_M_PARENTS_MAX:
426 case TK_M_MAX:
427 case TK_UNSET:
428 log_debug("unknown type %u\n", type);
429 break;
430 }
431 }
432
433 static void dump_rules(struct udev_rules *rules)
434 {
435 unsigned int i;
436
437 log_debug("dumping %u (%zu bytes) tokens, %u (%zu bytes) strings\n",
438 rules->token_cur,
439 rules->token_cur * sizeof(struct token),
440 rules->buf_count,
441 rules->buf_cur);
442 for(i = 0; i < rules->token_cur; i++)
443 dump_token(rules, &rules->tokens[i]);
444 }
445 #else
446 static inline const char *operation_str(enum operation_type type) { return NULL; }
447 static inline const char *token_str(enum token_type type) { return NULL; }
448 static inline void dump_token(struct udev_rules *rules, struct token *token) {}
449 static inline void dump_rules(struct udev_rules *rules) {}
450 #endif /* DEBUG */
451
452 static int add_new_string(struct udev_rules *rules, const char *str, size_t bytes)
453 {
454 int off;
455
456 /* grow buffer if needed */
457 if (rules->buf_cur + bytes+1 >= rules->buf_max) {
458 char *buf;
459 unsigned int add;
460
461 /* double the buffer size */
462 add = rules->buf_max;
463 if (add < bytes * 8)
464 add = bytes * 8;
465
466 buf = realloc(rules->buf, rules->buf_max + add);
467 if (buf == NULL)
468 return -1;
469 rules->buf = buf;
470 rules->buf_max += add;
471 }
472 off = rules->buf_cur;
473 memcpy(&rules->buf[rules->buf_cur], str, bytes);
474 rules->buf_cur += bytes;
475 rules->buf_count++;
476 return off;
477 }
478
479 static int add_string(struct udev_rules *rules, const char *str)
480 {
481 unsigned int node_idx;
482 struct trie_node *new_node;
483 unsigned int new_node_idx;
484 unsigned char key;
485 unsigned short len;
486 unsigned int depth;
487 unsigned int off;
488 struct trie_node *parent;
489
490 /* walk trie, start from last character of str to find matching tails */
491 len = strlen(str);
492 key = str[len-1];
493 node_idx = 0;
494 for (depth = 0; depth <= len; depth++) {
495 struct trie_node *node;
496 unsigned int child_idx;
497
498 node = &rules->trie_nodes[node_idx];
499 off = node->value_off + node->value_len - len;
500
501 /* match against current node */
502 if (depth == len || (node->value_len >= len && memcmp(&rules->buf[off], str, len) == 0))
503 return off;
504
505 /* lookup child node */
506 key = str[len - 1 - depth];
507 child_idx = node->child_idx;
508 while (child_idx > 0) {
509 struct trie_node *child;
510
511 child = &rules->trie_nodes[child_idx];
512 if (child->key == key)
513 break;
514 child_idx = child->next_child_idx;
515 }
516 if (child_idx == 0)
517 break;
518 node_idx = child_idx;
519 }
520
521 /* string not found, add it */
522 off = add_new_string(rules, str, len + 1);
523
524 /* grow trie nodes if needed */
525 if (rules->trie_nodes_cur >= rules->trie_nodes_max) {
526 struct trie_node *nodes;
527 unsigned int add;
528
529 /* double the buffer size */
530 add = rules->trie_nodes_max;
531 if (add < 8)
532 add = 8;
533
534 nodes = realloc(rules->trie_nodes, (rules->trie_nodes_max + add) * sizeof(struct trie_node));
535 if (nodes == NULL)
536 return -1;
537 rules->trie_nodes = nodes;
538 rules->trie_nodes_max += add;
539 }
540
541 /* get a new node */
542 new_node_idx = rules->trie_nodes_cur;
543 rules->trie_nodes_cur++;
544 new_node = &rules->trie_nodes[new_node_idx];
545 memset(new_node, 0x00, sizeof(struct trie_node));
546 new_node->value_off = off;
547 new_node->value_len = len;
548 new_node->key = key;
549
550 /* join the parent's child list */
551 parent = &rules->trie_nodes[node_idx];
552 if (parent->child_idx == 0) {
553 parent->child_idx = new_node_idx;
554 } else {
555 struct trie_node *last_child;
556
557 last_child = &rules->trie_nodes[parent->last_child_idx];
558 last_child->next_child_idx = new_node_idx;
559 }
560 parent->last_child_idx = new_node_idx;
561 return off;
562 }
563
564 static int add_token(struct udev_rules *rules, struct token *token)
565 {
566 /* grow buffer if needed */
567 if (rules->token_cur+1 >= rules->token_max) {
568 struct token *tokens;
569 unsigned int add;
570
571 /* double the buffer size */
572 add = rules->token_max;
573 if (add < 8)
574 add = 8;
575
576 tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
577 if (tokens == NULL)
578 return -1;
579 rules->tokens = tokens;
580 rules->token_max += add;
581 }
582 memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
583 rules->token_cur++;
584 return 0;
585 }
586
587 static uid_t add_uid(struct udev_rules *rules, const char *owner)
588 {
589 unsigned int i;
590 uid_t uid;
591 unsigned int off;
592
593 /* lookup, if we know it already */
594 for (i = 0; i < rules->uids_cur; i++) {
595 off = rules->uids[i].name_off;
596 if (streq(&rules->buf[off], owner)) {
597 uid = rules->uids[i].uid;
598 return uid;
599 }
600 }
601 uid = util_lookup_user(rules->udev, owner);
602
603 /* grow buffer if needed */
604 if (rules->uids_cur+1 >= rules->uids_max) {
605 struct uid_gid *uids;
606 unsigned int add;
607
608 /* double the buffer size */
609 add = rules->uids_max;
610 if (add < 1)
611 add = 8;
612
613 uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
614 if (uids == NULL)
615 return uid;
616 rules->uids = uids;
617 rules->uids_max += add;
618 }
619 rules->uids[rules->uids_cur].uid = uid;
620 off = add_string(rules, owner);
621 if (off <= 0)
622 return uid;
623 rules->uids[rules->uids_cur].name_off = off;
624 rules->uids_cur++;
625 return uid;
626 }
627
628 static gid_t add_gid(struct udev_rules *rules, const char *group)
629 {
630 unsigned int i;
631 gid_t gid;
632 unsigned int off;
633
634 /* lookup, if we know it already */
635 for (i = 0; i < rules->gids_cur; i++) {
636 off = rules->gids[i].name_off;
637 if (streq(&rules->buf[off], group)) {
638 gid = rules->gids[i].gid;
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;
657 rules->gids = gids;
658 rules->gids_max += add;
659 }
660 rules->gids[rules->gids_cur].gid = gid;
661 off = add_string(rules, group);
662 if (off <= 0)
663 return gid;
664 rules->gids[rules->gids_cur].name_off = off;
665 rules->gids_cur++;
666 return gid;
667 }
668
669 static int import_property_from_string(struct udev_device *dev, char *line)
670 {
671 char *key;
672 char *val;
673 size_t len;
674
675 /* find key */
676 key = line;
677 while (isspace(key[0]))
678 key++;
679
680 /* comment or empty line */
681 if (key[0] == '#' || key[0] == '\0')
682 return -1;
683
684 /* split key/value */
685 val = strchr(key, '=');
686 if (val == NULL)
687 return -1;
688 val[0] = '\0';
689 val++;
690
691 /* find value */
692 while (isspace(val[0]))
693 val++;
694
695 /* terminate key */
696 len = strlen(key);
697 if (len == 0)
698 return -1;
699 while (isspace(key[len-1]))
700 len--;
701 key[len] = '\0';
702
703 /* terminate value */
704 len = strlen(val);
705 if (len == 0)
706 return -1;
707 while (isspace(val[len-1]))
708 len--;
709 val[len] = '\0';
710
711 if (len == 0)
712 return -1;
713
714 /* unquote */
715 if (val[0] == '"' || val[0] == '\'') {
716 if (val[len-1] != val[0]) {
717 log_debug("inconsistent quoting: '%s', skip\n", line);
718 return -1;
719 }
720 val[len-1] = '\0';
721 val++;
722 }
723
724 /* handle device, renamed by external tool, returning new path */
725 if (streq(key, "DEVPATH")) {
726 char syspath[UTIL_PATH_SIZE];
727
728 log_debug("updating devpath from '%s' to '%s'\n",
729 udev_device_get_devpath(dev), val);
730 util_strscpyl(syspath, sizeof(syspath), "/sys", val, NULL);
731 udev_device_set_syspath(dev, syspath);
732 } else {
733 struct udev_list_entry *entry;
734
735 entry = udev_device_add_property(dev, key, val);
736 /* store in db, skip private keys */
737 if (key[0] != '.')
738 udev_list_entry_set_num(entry, true);
739 }
740 return 0;
741 }
742
743 static int import_file_into_properties(struct udev_device *dev, const char *filename)
744 {
745 FILE *f;
746 char line[UTIL_LINE_SIZE];
747
748 f = fopen(filename, "re");
749 if (f == NULL)
750 return -1;
751 while (fgets(line, sizeof(line), f) != NULL)
752 import_property_from_string(dev, line);
753 fclose(f);
754 return 0;
755 }
756
757 static int import_program_into_properties(struct udev_event *event, const char *program, const sigset_t *sigmask)
758 {
759 struct udev_device *dev = event->dev;
760 char **envp;
761 char result[UTIL_LINE_SIZE];
762 char *line;
763 int err;
764
765 envp = udev_device_get_properties_envp(dev);
766 err = udev_event_spawn(event, program, envp, sigmask, result, sizeof(result));
767 if (err < 0)
768 return err;
769
770 line = result;
771 while (line != NULL) {
772 char *pos;
773
774 pos = strchr(line, '\n');
775 if (pos != NULL) {
776 pos[0] = '\0';
777 pos = &pos[1];
778 }
779 import_property_from_string(dev, line);
780 line = pos;
781 }
782 return 0;
783 }
784
785 static int import_parent_into_properties(struct udev_device *dev, const char *filter)
786 {
787 struct udev_device *dev_parent;
788 struct udev_list_entry *list_entry;
789
790 dev_parent = udev_device_get_parent(dev);
791 if (dev_parent == NULL)
792 return -1;
793
794 udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
795 const char *key = udev_list_entry_get_name(list_entry);
796 const char *val = udev_list_entry_get_value(list_entry);
797
798 if (fnmatch(filter, key, 0) == 0) {
799 struct udev_list_entry *entry;
800
801 entry = udev_device_add_property(dev, key, val);
802 /* store in db, skip private keys */
803 if (key[0] != '.')
804 udev_list_entry_set_num(entry, true);
805 }
806 }
807 return 0;
808 }
809
810 #define WAIT_LOOP_PER_SECOND 50
811 static int wait_for_file(struct udev_device *dev, const char *file, int timeout)
812 {
813 char filepath[UTIL_PATH_SIZE];
814 char devicepath[UTIL_PATH_SIZE];
815 struct stat stats;
816 int loop = timeout * WAIT_LOOP_PER_SECOND;
817
818 /* a relative path is a device attribute */
819 devicepath[0] = '\0';
820 if (file[0] != '/') {
821 util_strscpyl(devicepath, sizeof(devicepath), udev_device_get_syspath(dev), NULL);
822 util_strscpyl(filepath, sizeof(filepath), devicepath, "/", file, NULL);
823 file = filepath;
824 }
825
826 while (--loop) {
827 const struct timespec duration = { 0, 1000 * 1000 * 1000 / WAIT_LOOP_PER_SECOND };
828
829 /* lookup file */
830 if (stat(file, &stats) == 0) {
831 log_debug("file '%s' appeared after %i loops\n", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
832 return 0;
833 }
834 /* make sure, the device did not disappear in the meantime */
835 if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
836 log_debug("device disappeared while waiting for '%s'\n", file);
837 return -2;
838 }
839 log_debug("wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND);
840 nanosleep(&duration, NULL);
841 }
842 log_debug("waiting for '%s' failed\n", file);
843 return -1;
844 }
845
846 static int attr_subst_subdir(char *attr, size_t len)
847 {
848 bool found = false;
849
850 if (strstr(attr, "/*/")) {
851 char *pos;
852 char dirname[UTIL_PATH_SIZE];
853 const char *tail;
854 DIR *dir;
855
856 util_strscpy(dirname, sizeof(dirname), attr);
857 pos = strstr(dirname, "/*/");
858 if (pos == NULL)
859 return -1;
860 pos[0] = '\0';
861 tail = &pos[2];
862 dir = opendir(dirname);
863 if (dir != NULL) {
864 struct dirent *dent;
865
866 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
867 struct stat stats;
868
869 if (dent->d_name[0] == '.')
870 continue;
871 util_strscpyl(attr, len, dirname, "/", dent->d_name, tail, NULL);
872 if (stat(attr, &stats) == 0) {
873 found = true;
874 break;
875 }
876 }
877 closedir(dir);
878 }
879 }
880
881 return found;
882 }
883
884 static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value)
885 {
886 char *linepos;
887 char *temp;
888
889 linepos = *line;
890 if (linepos == NULL || linepos[0] == '\0')
891 return -1;
892
893 /* skip whitespace */
894 while (isspace(linepos[0]) || linepos[0] == ',')
895 linepos++;
896
897 /* get the key */
898 if (linepos[0] == '\0')
899 return -1;
900 *key = linepos;
901
902 for (;;) {
903 linepos++;
904 if (linepos[0] == '\0')
905 return -1;
906 if (isspace(linepos[0]))
907 break;
908 if (linepos[0] == '=')
909 break;
910 if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
911 if (linepos[1] == '=')
912 break;
913 }
914
915 /* remember end of key */
916 temp = linepos;
917
918 /* skip whitespace after key */
919 while (isspace(linepos[0]))
920 linepos++;
921 if (linepos[0] == '\0')
922 return -1;
923
924 /* get operation type */
925 if (linepos[0] == '=' && linepos[1] == '=') {
926 *op = OP_MATCH;
927 linepos += 2;
928 } else if (linepos[0] == '!' && linepos[1] == '=') {
929 *op = OP_NOMATCH;
930 linepos += 2;
931 } else if (linepos[0] == '+' && linepos[1] == '=') {
932 *op = OP_ADD;
933 linepos += 2;
934 } else if (linepos[0] == '=') {
935 *op = OP_ASSIGN;
936 linepos++;
937 } else if (linepos[0] == ':' && linepos[1] == '=') {
938 *op = OP_ASSIGN_FINAL;
939 linepos += 2;
940 } else
941 return -1;
942
943 /* terminate key */
944 temp[0] = '\0';
945
946 /* skip whitespace after operator */
947 while (isspace(linepos[0]))
948 linepos++;
949 if (linepos[0] == '\0')
950 return -1;
951
952 /* get the value */
953 if (linepos[0] == '"')
954 linepos++;
955 else
956 return -1;
957 *value = linepos;
958
959 /* terminate */
960 temp = strchr(linepos, '"');
961 if (!temp)
962 return -1;
963 temp[0] = '\0';
964 temp++;
965
966 /* move line to next key */
967 *line = temp;
968 return 0;
969 }
970
971 /* extract possible KEY{attr} */
972 static const char *get_key_attribute(struct udev *udev, char *str)
973 {
974 char *pos;
975 char *attr;
976
977 attr = strchr(str, '{');
978 if (attr != NULL) {
979 attr++;
980 pos = strchr(attr, '}');
981 if (pos == NULL) {
982 log_error("missing closing brace for format\n");
983 return NULL;
984 }
985 pos[0] = '\0';
986 return attr;
987 }
988 return NULL;
989 }
990
991 static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
992 enum operation_type op,
993 const char *value, const void *data)
994 {
995 struct token *token = &rule_tmp->token[rule_tmp->token_cur];
996 const char *attr = NULL;
997
998 memset(token, 0x00, sizeof(struct token));
999
1000 switch (type) {
1001 case TK_M_ACTION:
1002 case TK_M_DEVPATH:
1003 case TK_M_KERNEL:
1004 case TK_M_SUBSYSTEM:
1005 case TK_M_DRIVER:
1006 case TK_M_WAITFOR:
1007 case TK_M_DEVLINK:
1008 case TK_M_NAME:
1009 case TK_M_KERNELS:
1010 case TK_M_SUBSYSTEMS:
1011 case TK_M_DRIVERS:
1012 case TK_M_TAGS:
1013 case TK_M_PROGRAM:
1014 case TK_M_IMPORT_FILE:
1015 case TK_M_IMPORT_PROG:
1016 case TK_M_IMPORT_DB:
1017 case TK_M_IMPORT_CMDLINE:
1018 case TK_M_IMPORT_PARENT:
1019 case TK_M_RESULT:
1020 case TK_A_OWNER:
1021 case TK_A_GROUP:
1022 case TK_A_MODE:
1023 case TK_A_NAME:
1024 case TK_A_GOTO:
1025 case TK_M_TAG:
1026 case TK_A_TAG:
1027 token->key.value_off = add_string(rule_tmp->rules, value);
1028 break;
1029 case TK_M_IMPORT_BUILTIN:
1030 token->key.value_off = add_string(rule_tmp->rules, value);
1031 token->key.builtin_cmd = *(enum udev_builtin_cmd *)data;
1032 break;
1033 case TK_M_ENV:
1034 case TK_M_ATTR:
1035 case TK_M_ATTRS:
1036 case TK_A_ATTR:
1037 case TK_A_ENV:
1038 attr = data;
1039 token->key.value_off = add_string(rule_tmp->rules, value);
1040 token->key.attr_off = add_string(rule_tmp->rules, attr);
1041 break;
1042 case TK_A_DEVLINK:
1043 token->key.value_off = add_string(rule_tmp->rules, value);
1044 token->key.devlink_unique = *(int *)data;
1045 break;
1046 case TK_M_TEST:
1047 token->key.value_off = add_string(rule_tmp->rules, value);
1048 if (data != NULL)
1049 token->key.mode = *(mode_t *)data;
1050 break;
1051 case TK_A_STRING_ESCAPE_NONE:
1052 case TK_A_STRING_ESCAPE_REPLACE:
1053 case TK_A_DB_PERSIST:
1054 break;
1055 case TK_A_RUN_BUILTIN:
1056 case TK_A_RUN_PROGRAM:
1057 token->key.builtin_cmd = *(enum udev_builtin_cmd *)data;
1058 token->key.value_off = add_string(rule_tmp->rules, value);
1059 break;
1060 case TK_A_INOTIFY_WATCH:
1061 case TK_A_DEVLINK_PRIO:
1062 token->key.devlink_prio = *(int *)data;
1063 break;
1064 case TK_A_OWNER_ID:
1065 token->key.uid = *(uid_t *)data;
1066 break;
1067 case TK_A_GROUP_ID:
1068 token->key.gid = *(gid_t *)data;
1069 break;
1070 case TK_A_MODE_ID:
1071 token->key.mode = *(mode_t *)data;
1072 break;
1073 case TK_A_STATIC_NODE:
1074 token->key.value_off = add_string(rule_tmp->rules, value);
1075 break;
1076 case TK_M_EVENT_TIMEOUT:
1077 token->key.event_timeout = *(int *)data;
1078 break;
1079 case TK_RULE:
1080 case TK_M_PARENTS_MIN:
1081 case TK_M_PARENTS_MAX:
1082 case TK_M_MAX:
1083 case TK_END:
1084 case TK_UNSET:
1085 log_error("wrong type %u\n", type);
1086 return -1;
1087 }
1088
1089 if (value != NULL && type < TK_M_MAX) {
1090 /* check if we need to split or call fnmatch() while matching rules */
1091 enum string_glob_type glob;
1092 int has_split;
1093 int has_glob;
1094
1095 has_split = (strchr(value, '|') != NULL);
1096 has_glob = (strchr(value, '*') != NULL || strchr(value, '?') != NULL || strchr(value, '[') != NULL);
1097 if (has_split && has_glob) {
1098 glob = GL_SPLIT_GLOB;
1099 } else if (has_split) {
1100 glob = GL_SPLIT;
1101 } else if (has_glob) {
1102 if (streq(value, "?*"))
1103 glob = GL_SOMETHING;
1104 else
1105 glob = GL_GLOB;
1106 } else {
1107 glob = GL_PLAIN;
1108 }
1109 token->key.glob = glob;
1110 }
1111
1112 if (value != NULL && type > TK_M_MAX) {
1113 /* check if assigned value has substitution chars */
1114 if (value[0] == '[')
1115 token->key.subst = SB_SUBSYS;
1116 else if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
1117 token->key.subst = SB_FORMAT;
1118 else
1119 token->key.subst = SB_NONE;
1120 }
1121
1122 if (attr != NULL) {
1123 /* check if property/attribut name has substitution chars */
1124 if (attr[0] == '[')
1125 token->key.attrsubst = SB_SUBSYS;
1126 else if (strchr(attr, '%') != NULL || strchr(attr, '$') != NULL)
1127 token->key.attrsubst = SB_FORMAT;
1128 else
1129 token->key.attrsubst = SB_NONE;
1130 }
1131
1132 token->key.type = type;
1133 token->key.op = op;
1134 rule_tmp->token_cur++;
1135 if (rule_tmp->token_cur >= ELEMENTSOF(rule_tmp->token)) {
1136 log_error("temporary rule array too small\n");
1137 return -1;
1138 }
1139 return 0;
1140 }
1141
1142 static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp)
1143 {
1144 unsigned int i;
1145 unsigned int start = 0;
1146 unsigned int end = rule_tmp->token_cur;
1147
1148 for (i = 0; i < rule_tmp->token_cur; i++) {
1149 enum token_type next_val = TK_UNSET;
1150 unsigned int next_idx = 0;
1151 unsigned int j;
1152
1153 /* find smallest value */
1154 for (j = start; j < end; j++) {
1155 if (rule_tmp->token[j].type == TK_UNSET)
1156 continue;
1157 if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
1158 next_val = rule_tmp->token[j].type;
1159 next_idx = j;
1160 }
1161 }
1162
1163 /* add token and mark done */
1164 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
1165 return -1;
1166 rule_tmp->token[next_idx].type = TK_UNSET;
1167
1168 /* shrink range */
1169 if (next_idx == start)
1170 start++;
1171 if (next_idx+1 == end)
1172 end--;
1173 }
1174 return 0;
1175 }
1176
1177 static int add_rule(struct udev_rules *rules, char *line,
1178 const char *filename, unsigned int filename_off, unsigned int lineno)
1179 {
1180 char *linepos;
1181 const char *attr;
1182 struct rule_tmp rule_tmp;
1183
1184 memset(&rule_tmp, 0x00, sizeof(struct rule_tmp));
1185 rule_tmp.rules = rules;
1186 rule_tmp.rule.type = TK_RULE;
1187 /* the offset in the rule is limited to unsigned short */
1188 if (filename_off < USHRT_MAX)
1189 rule_tmp.rule.rule.filename_off = filename_off;
1190 rule_tmp.rule.rule.filename_line = lineno;
1191
1192 linepos = line;
1193 for (;;) {
1194 char *key;
1195 char *value;
1196 enum operation_type op;
1197
1198 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0)
1199 break;
1200
1201 if (streq(key, "ACTION")) {
1202 if (op > OP_MATCH_MAX) {
1203 log_error("invalid ACTION operation\n");
1204 goto invalid;
1205 }
1206 rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL);
1207 continue;
1208 }
1209
1210 if (streq(key, "DEVPATH")) {
1211 if (op > OP_MATCH_MAX) {
1212 log_error("invalid DEVPATH operation\n");
1213 goto invalid;
1214 }
1215 rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
1216 continue;
1217 }
1218
1219 if (streq(key, "KERNEL")) {
1220 if (op > OP_MATCH_MAX) {
1221 log_error("invalid KERNEL operation\n");
1222 goto invalid;
1223 }
1224 rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL);
1225 continue;
1226 }
1227
1228 if (streq(key, "SUBSYSTEM")) {
1229 if (op > OP_MATCH_MAX) {
1230 log_error("invalid SUBSYSTEM operation\n");
1231 goto invalid;
1232 }
1233 /* bus, class, subsystem events should all be the same */
1234 if (streq(value, "subsystem") ||
1235 streq(value, "bus") ||
1236 streq(value, "class")) {
1237 if (streq(value, "bus") || streq(value, "class"))
1238 log_error("'%s' must be specified as 'subsystem' \n"
1239 "please fix it in %s:%u", value, filename, lineno);
1240 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
1241 } else
1242 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
1243 continue;
1244 }
1245
1246 if (streq(key, "DRIVER")) {
1247 if (op > OP_MATCH_MAX) {
1248 log_error("invalid DRIVER operation\n");
1249 goto invalid;
1250 }
1251 rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL);
1252 continue;
1253 }
1254
1255 if (startswith(key, "ATTR{")) {
1256 attr = get_key_attribute(rules->udev, key + sizeof("ATTR")-1);
1257 if (attr == NULL) {
1258 log_error("error parsing ATTR attribute\n");
1259 goto invalid;
1260 }
1261 if (op < OP_MATCH_MAX) {
1262 rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
1263 } else {
1264 rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr);
1265 }
1266 continue;
1267 }
1268
1269 if (streq(key, "KERNELS")) {
1270 if (op > OP_MATCH_MAX) {
1271 log_error("invalid KERNELS operation\n");
1272 goto invalid;
1273 }
1274 rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1275 continue;
1276 }
1277
1278 if (streq(key, "SUBSYSTEMS")) {
1279 if (op > OP_MATCH_MAX) {
1280 log_error("invalid SUBSYSTEMS operation\n");
1281 goto invalid;
1282 }
1283 rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1284 continue;
1285 }
1286
1287 if (streq(key, "DRIVERS")) {
1288 if (op > OP_MATCH_MAX) {
1289 log_error("invalid DRIVERS operation\n");
1290 goto invalid;
1291 }
1292 rule_add_key(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
1293 continue;
1294 }
1295
1296 if (startswith(key, "ATTRS{")) {
1297 if (op > OP_MATCH_MAX) {
1298 log_error("invalid ATTRS operation\n");
1299 goto invalid;
1300 }
1301 attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
1302 if (attr == NULL) {
1303 log_error("error parsing ATTRS attribute\n");
1304 goto invalid;
1305 }
1306 if (startswith(attr, "device/"))
1307 log_error("the 'device' link may not be available in a future kernel, "
1308 "please fix it in %s:%u", filename, lineno);
1309 else if (strstr(attr, "../") != NULL)
1310 log_error("do not reference parent sysfs directories directly, "
1311 "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
1312 rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1313 continue;
1314 }
1315
1316 if (streq(key, "TAGS")) {
1317 if (op > OP_MATCH_MAX) {
1318 log_error("invalid TAGS operation\n");
1319 goto invalid;
1320 }
1321 rule_add_key(&rule_tmp, TK_M_TAGS, op, value, NULL);
1322 continue;
1323 }
1324
1325 if (startswith(key, "ENV{")) {
1326 attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1);
1327 if (attr == NULL) {
1328 log_error("error parsing ENV attribute\n");
1329 goto invalid;
1330 }
1331 if (op < OP_MATCH_MAX) {
1332 if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
1333 goto invalid;
1334 } else {
1335 static const char *blacklist[] = {
1336 "ACTION",
1337 "SUBSYSTEM",
1338 "DEVTYPE",
1339 "MAJOR",
1340 "MINOR",
1341 "DRIVER",
1342 "IFINDEX",
1343 "DEVNAME",
1344 "DEVLINKS",
1345 "DEVPATH",
1346 "TAGS",
1347 };
1348 unsigned int i;
1349
1350 for (i = 0; i < ELEMENTSOF(blacklist); i++) {
1351 if (!streq(attr, blacklist[i]))
1352 continue;
1353 log_error("invalid ENV attribute, '%s' can not be set %s:%u\n", attr, filename, lineno);
1354 goto invalid;
1355 }
1356 if (rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
1357 goto invalid;
1358 }
1359 continue;
1360 }
1361
1362 if (streq(key, "TAG")) {
1363 if (op < OP_MATCH_MAX)
1364 rule_add_key(&rule_tmp, TK_M_TAG, op, value, NULL);
1365 else
1366 rule_add_key(&rule_tmp, TK_A_TAG, op, value, NULL);
1367 continue;
1368 }
1369
1370 if (streq(key, "PROGRAM")) {
1371 rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
1372 continue;
1373 }
1374
1375 if (streq(key, "RESULT")) {
1376 if (op > OP_MATCH_MAX) {
1377 log_error("invalid RESULT operation\n");
1378 goto invalid;
1379 }
1380 rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL);
1381 continue;
1382 }
1383
1384 if (startswith(key, "IMPORT")) {
1385 attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1);
1386 if (attr == NULL) {
1387 log_error("IMPORT{} type missing, ignoring IMPORT %s:%u\n", filename, lineno);
1388 continue;
1389 }
1390 if (streq(attr, "program")) {
1391 /* find known built-in command */
1392 if (value[0] != '/') {
1393 enum udev_builtin_cmd cmd;
1394
1395 cmd = udev_builtin_lookup(value);
1396 if (cmd < UDEV_BUILTIN_MAX) {
1397 log_debug("IMPORT found builtin '%s', replacing %s:%u\n",
1398 value, filename, lineno);
1399 rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, value, &cmd);
1400 continue;
1401 }
1402 }
1403 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1404 } else if (streq(attr, "builtin")) {
1405 enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
1406
1407 if (cmd < UDEV_BUILTIN_MAX)
1408 rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, value, &cmd);
1409 else
1410 log_error("IMPORT{builtin}: '%s' unknown %s:%u\n", value, filename, lineno);
1411 } else if (streq(attr, "file")) {
1412 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1413 } else if (streq(attr, "db")) {
1414 rule_add_key(&rule_tmp, TK_M_IMPORT_DB, op, value, NULL);
1415 } else if (streq(attr, "cmdline")) {
1416 rule_add_key(&rule_tmp, TK_M_IMPORT_CMDLINE, op, value, NULL);
1417 } else if (streq(attr, "parent")) {
1418 rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
1419 } else
1420 log_error("IMPORT{} unknown type, ignoring IMPORT %s:%u\n", filename, lineno);
1421 continue;
1422 }
1423
1424 if (startswith(key, "TEST")) {
1425 mode_t mode = 0;
1426
1427 if (op > OP_MATCH_MAX) {
1428 log_error("invalid TEST operation\n");
1429 goto invalid;
1430 }
1431 attr = get_key_attribute(rules->udev, key + sizeof("TEST")-1);
1432 if (attr != NULL) {
1433 mode = strtol(attr, NULL, 8);
1434 rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode);
1435 } else {
1436 rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL);
1437 }
1438 continue;
1439 }
1440
1441 if (startswith(key, "RUN")) {
1442 attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1);
1443 if (attr == NULL)
1444 attr = "program";
1445
1446 if (streq(attr, "builtin")) {
1447 enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
1448
1449 if (cmd < UDEV_BUILTIN_MAX)
1450 rule_add_key(&rule_tmp, TK_A_RUN_BUILTIN, op, value, &cmd);
1451 else
1452 log_error("IMPORT{builtin}: '%s' unknown %s:%u\n", value, filename, lineno);
1453 } else if (streq(attr, "program")) {
1454 enum udev_builtin_cmd cmd = UDEV_BUILTIN_MAX;
1455
1456 rule_add_key(&rule_tmp, TK_A_RUN_PROGRAM, op, value, &cmd);
1457 } else {
1458 log_error("RUN{} unknown type, ignoring RUN %s:%u\n", filename, lineno);
1459 }
1460
1461 continue;
1462 }
1463
1464 if (streq(key, "WAIT_FOR") || streq(key, "WAIT_FOR_SYSFS")) {
1465 rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1466 continue;
1467 }
1468
1469 if (streq(key, "LABEL")) {
1470 rule_tmp.rule.rule.label_off = add_string(rules, value);
1471 continue;
1472 }
1473
1474 if (streq(key, "GOTO")) {
1475 rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1476 continue;
1477 }
1478
1479 if (startswith(key, "NAME")) {
1480 if (op < OP_MATCH_MAX) {
1481 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
1482 } else {
1483 if (streq(value, "%k")) {
1484 log_error("NAME=\"%%k\" is ignored, because it breaks kernel supplied names, "
1485 "please remove it from %s:%u\n", filename, lineno);
1486 continue;
1487 }
1488 if (value[0] == '\0') {
1489 log_debug("NAME=\"\" is ignored, because udev will not delete any device nodes, "
1490 "please remove it from %s:%u\n", filename, lineno);
1491 continue;
1492 }
1493 rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL);
1494 }
1495 rule_tmp.rule.rule.can_set_name = true;
1496 continue;
1497 }
1498
1499 if (startswith(key, "SYMLINK")) {
1500 if (op < OP_MATCH_MAX) {
1501 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
1502 } else {
1503 int flag = 0;
1504
1505 attr = get_key_attribute(rules->udev, key + sizeof("SYMLINK")-1);
1506 if (attr != NULL && strstr(attr, "unique") != NULL)
1507 flag = 1;
1508 rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, &flag);
1509 }
1510 rule_tmp.rule.rule.can_set_name = true;
1511 continue;
1512 }
1513
1514 if (streq(key, "OWNER")) {
1515 uid_t uid;
1516 char *endptr;
1517
1518 uid = strtoul(value, &endptr, 10);
1519 if (endptr[0] == '\0') {
1520 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1521 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1522 uid = add_uid(rules, value);
1523 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1524 } else if (rules->resolve_names >= 0) {
1525 rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
1526 }
1527 rule_tmp.rule.rule.can_set_name = true;
1528 continue;
1529 }
1530
1531 if (streq(key, "GROUP")) {
1532 gid_t gid;
1533 char *endptr;
1534
1535 gid = strtoul(value, &endptr, 10);
1536 if (endptr[0] == '\0') {
1537 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1538 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1539 gid = add_gid(rules, value);
1540 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1541 } else if (rules->resolve_names >= 0) {
1542 rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
1543 }
1544 rule_tmp.rule.rule.can_set_name = true;
1545 continue;
1546 }
1547
1548 if (streq(key, "MODE")) {
1549 mode_t mode;
1550 char *endptr;
1551
1552 mode = strtol(value, &endptr, 8);
1553 if (endptr[0] == '\0')
1554 rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1555 else
1556 rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
1557 rule_tmp.rule.rule.can_set_name = true;
1558 continue;
1559 }
1560
1561 if (streq(key, "OPTIONS")) {
1562 const char *pos;
1563
1564 pos = strstr(value, "link_priority=");
1565 if (pos != NULL) {
1566 int prio = atoi(&pos[strlen("link_priority=")]);
1567
1568 rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, op, NULL, &prio);
1569 }
1570
1571 pos = strstr(value, "event_timeout=");
1572 if (pos != NULL) {
1573 int tout = atoi(&pos[strlen("event_timeout=")]);
1574
1575 rule_add_key(&rule_tmp, TK_M_EVENT_TIMEOUT, op, NULL, &tout);
1576 }
1577
1578 pos = strstr(value, "string_escape=");
1579 if (pos != NULL) {
1580 pos = &pos[strlen("string_escape=")];
1581 if (startswith(pos, "none"))
1582 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, op, NULL, NULL);
1583 else if (startswith(pos, "replace"))
1584 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, op, NULL, NULL);
1585 }
1586
1587 pos = strstr(value, "db_persist");
1588 if (pos != NULL)
1589 rule_add_key(&rule_tmp, TK_A_DB_PERSIST, op, NULL, NULL);
1590
1591 pos = strstr(value, "nowatch");
1592 if (pos != NULL) {
1593 const int off = 0;
1594
1595 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &off);
1596 } else {
1597 pos = strstr(value, "watch");
1598 if (pos != NULL) {
1599 const int on = 1;
1600
1601 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &on);
1602 }
1603 }
1604
1605 pos = strstr(value, "static_node=");
1606 if (pos != NULL) {
1607 rule_add_key(&rule_tmp, TK_A_STATIC_NODE, op, &pos[strlen("static_node=")], NULL);
1608 rule_tmp.rule.rule.has_static_node = true;
1609 }
1610
1611 continue;
1612 }
1613
1614 log_error("unknown key '%s' in %s:%u\n", key, filename, lineno);
1615 goto invalid;
1616 }
1617
1618 /* add rule token */
1619 rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur;
1620 if (add_token(rules, &rule_tmp.rule) != 0)
1621 goto invalid;
1622
1623 /* add tokens to list, sorted by type */
1624 if (sort_token(rules, &rule_tmp) != 0)
1625 goto invalid;
1626
1627 return 0;
1628 invalid:
1629 log_error("invalid rule '%s:%u'\n", filename, lineno);
1630 return -1;
1631 }
1632
1633 static int parse_file(struct udev_rules *rules, const char *filename)
1634 {
1635 FILE *f;
1636 unsigned int first_token;
1637 unsigned int filename_off;
1638 char line[UTIL_LINE_SIZE];
1639 int line_nr = 0;
1640 unsigned int i;
1641
1642 if (null_or_empty_path(filename)) {
1643 log_debug("skip empty file: %s\n", filename);
1644 return 0;
1645 }
1646 log_debug("read rules file: %s\n", filename);
1647
1648 f = fopen(filename, "re");
1649 if (f == NULL)
1650 return -1;
1651
1652 first_token = rules->token_cur;
1653 filename_off = add_string(rules, filename);
1654
1655 while (fgets(line, sizeof(line), f) != NULL) {
1656 char *key;
1657 size_t len;
1658
1659 /* skip whitespace */
1660 line_nr++;
1661 key = line;
1662 while (isspace(key[0]))
1663 key++;
1664
1665 /* comment */
1666 if (key[0] == '#')
1667 continue;
1668
1669 len = strlen(line);
1670 if (len < 3)
1671 continue;
1672
1673 /* continue reading if backslash+newline is found */
1674 while (line[len-2] == '\\') {
1675 if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1676 break;
1677 if (strlen(&line[len-2]) < 2)
1678 break;
1679 line_nr++;
1680 len = strlen(line);
1681 }
1682
1683 if (len+1 >= sizeof(line)) {
1684 log_error("line too long '%s':%u, ignored\n", filename, line_nr);
1685 continue;
1686 }
1687 add_rule(rules, key, filename, filename_off, line_nr);
1688 }
1689 fclose(f);
1690
1691 /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1692 for (i = first_token+1; i < rules->token_cur; i++) {
1693 if (rules->tokens[i].type == TK_A_GOTO) {
1694 char *label = &rules->buf[rules->tokens[i].key.value_off];
1695 unsigned int j;
1696
1697 for (j = i+1; j < rules->token_cur; j++) {
1698 if (rules->tokens[j].type != TK_RULE)
1699 continue;
1700 if (rules->tokens[j].rule.label_off == 0)
1701 continue;
1702 if (!streq(label, &rules->buf[rules->tokens[j].rule.label_off]))
1703 continue;
1704 rules->tokens[i].key.rule_goto = j;
1705 break;
1706 }
1707 if (rules->tokens[i].key.rule_goto == 0)
1708 log_error("GOTO '%s' has no matching label in: '%s'\n", label, filename);
1709 }
1710 }
1711 return 0;
1712 }
1713
1714 struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
1715 {
1716 struct udev_rules *rules;
1717 struct udev_list file_list;
1718 struct token end_token;
1719 char **files, **f;
1720 int r;
1721
1722 rules = calloc(1, sizeof(struct udev_rules));
1723 if (rules == NULL)
1724 return NULL;
1725 rules->udev = udev;
1726 rules->resolve_names = resolve_names;
1727 udev_list_init(udev, &file_list, true);
1728
1729 /* init token array and string buffer */
1730 rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
1731 if (rules->tokens == NULL) {
1732 free(rules);
1733 return NULL;
1734 }
1735 rules->token_max = PREALLOC_TOKEN;
1736
1737 rules->buf = malloc(PREALLOC_STRBUF);
1738 if (rules->buf == NULL) {
1739 free(rules->tokens);
1740 free(rules);
1741 return NULL;
1742 }
1743 rules->buf_max = PREALLOC_STRBUF;
1744 /* offset 0 is always '\0' */
1745 rules->buf[0] = '\0';
1746 rules->buf_cur = 1;
1747
1748 rules->trie_nodes = malloc(PREALLOC_TRIE * sizeof(struct trie_node));
1749 if (rules->trie_nodes == NULL) {
1750 free(rules->buf);
1751 free(rules->tokens);
1752 free(rules);
1753 return NULL;
1754 }
1755 rules->trie_nodes_max = PREALLOC_TRIE;
1756 /* offset 0 is the trie root, with an empty string */
1757 memset(rules->trie_nodes, 0x00, sizeof(struct trie_node));
1758 rules->trie_nodes_cur = 1;
1759
1760 rules->dirs = strv_new(SYSCONFDIR "/udev/rules.d",
1761 "/run/udev/rules.d",
1762 UDEVLIBEXECDIR "/rules.d",
1763 NULL);
1764 if (!rules->dirs) {
1765 log_error("failed to build config directory array");
1766 return NULL;
1767 }
1768 if (!path_strv_canonicalize(rules->dirs)) {
1769 log_error("failed to canonicalize config directories\n");
1770 return NULL;
1771 }
1772 strv_uniq(rules->dirs);
1773
1774 rules->dirs_ts_usec = calloc(strv_length(rules->dirs), sizeof(long long));
1775 udev_rules_check_timestamp(rules);
1776
1777 r = conf_files_list_strv(&files, ".rules", (const char **)rules->dirs);
1778 if (r < 0) {
1779 log_error("failed to enumerate rules files: %s\n", strerror(-r));
1780 return NULL;
1781 }
1782
1783 /*
1784 * The offset value in the rules strct is limited; add all
1785 * rules file names to the beginning of the string buffer.
1786 */
1787 STRV_FOREACH(f, files)
1788 add_string(rules, *f);
1789
1790 STRV_FOREACH(f, files)
1791 parse_file(rules, *f);
1792
1793 strv_free(files);
1794
1795 memset(&end_token, 0x00, sizeof(struct token));
1796 end_token.type = TK_END;
1797 add_token(rules, &end_token);
1798
1799 /* shrink allocated token and string buffer */
1800 if (rules->token_cur < rules->token_max) {
1801 struct token *tokens;
1802
1803 tokens = realloc(rules->tokens, rules->token_cur * sizeof(struct token));
1804 if (tokens != NULL || rules->token_cur == 0) {
1805 rules->tokens = tokens;
1806 rules->token_max = rules->token_cur;
1807 }
1808 }
1809 if (rules->buf_cur < rules->buf_max) {
1810 char *buf;
1811
1812 buf = realloc(rules->buf, rules->buf_cur);
1813 if (buf != NULL || rules->buf_cur == 0) {
1814 rules->buf = buf;
1815 rules->buf_max = rules->buf_cur;
1816 }
1817 }
1818 log_debug("rules use %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1819 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1820 log_debug("temporary index used %zu bytes (%u * %zu bytes)\n",
1821 rules->trie_nodes_cur * sizeof(struct trie_node),
1822 rules->trie_nodes_cur, sizeof(struct trie_node));
1823
1824 /* cleanup trie */
1825 free(rules->trie_nodes);
1826 rules->trie_nodes = NULL;
1827 rules->trie_nodes_cur = 0;
1828 rules->trie_nodes_max = 0;
1829
1830 /* cleanup uid/gid cache */
1831 free(rules->uids);
1832 rules->uids = NULL;
1833 rules->uids_cur = 0;
1834 rules->uids_max = 0;
1835 free(rules->gids);
1836 rules->gids = NULL;
1837 rules->gids_cur = 0;
1838 rules->gids_max = 0;
1839
1840 dump_rules(rules);
1841 return rules;
1842 }
1843
1844 struct udev_rules *udev_rules_unref(struct udev_rules *rules)
1845 {
1846 if (rules == NULL)
1847 return NULL;
1848 free(rules->tokens);
1849 free(rules->buf);
1850 free(rules->trie_nodes);
1851 free(rules->uids);
1852 free(rules->gids);
1853 strv_free(rules->dirs);
1854 free(rules->dirs_ts_usec);
1855 free(rules);
1856 return NULL;
1857 }
1858
1859 bool udev_rules_check_timestamp(struct udev_rules *rules)
1860 {
1861 unsigned int i;
1862 bool changed = false;
1863
1864 if (rules == NULL)
1865 goto out;
1866
1867 for (i = 0; rules->dirs[i]; i++) {
1868 struct stat stats;
1869
1870 if (stat(rules->dirs[i], &stats) < 0)
1871 continue;
1872
1873 if (rules->dirs_ts_usec[i] == ts_usec(&stats.st_mtim))
1874 continue;
1875
1876 /* first check */
1877 if (rules->dirs_ts_usec[i] != 0) {
1878 log_debug("reload - timestamp of '%s' changed\n", rules->dirs[i]);
1879 changed = true;
1880 }
1881
1882 /* update timestamp */
1883 rules->dirs_ts_usec[i] = ts_usec(&stats.st_mtim);
1884 }
1885 out:
1886 return changed;
1887 }
1888
1889 static int match_key(struct udev_rules *rules, struct token *token, const char *val)
1890 {
1891 char *key_value = &rules->buf[token->key.value_off];
1892 char *pos;
1893 bool match = false;
1894
1895 if (val == NULL)
1896 val = "";
1897
1898 switch (token->key.glob) {
1899 case GL_PLAIN:
1900 match = (streq(key_value, val));
1901 break;
1902 case GL_GLOB:
1903 match = (fnmatch(key_value, val, 0) == 0);
1904 break;
1905 case GL_SPLIT:
1906 {
1907 const char *s;
1908 size_t len;
1909
1910 s = &rules->buf[token->key.value_off];
1911 len = strlen(val);
1912 for (;;) {
1913 const char *next;
1914
1915 next = strchr(s, '|');
1916 if (next != NULL) {
1917 size_t matchlen = (size_t)(next - s);
1918
1919 match = (matchlen == len && strncmp(s, val, matchlen) == 0);
1920 if (match)
1921 break;
1922 } else {
1923 match = (streq(s, val));
1924 break;
1925 }
1926 s = &next[1];
1927 }
1928 break;
1929 }
1930 case GL_SPLIT_GLOB:
1931 {
1932 char value[UTIL_PATH_SIZE];
1933
1934 util_strscpy(value, sizeof(value), &rules->buf[token->key.value_off]);
1935 key_value = value;
1936 while (key_value != NULL) {
1937 pos = strchr(key_value, '|');
1938 if (pos != NULL) {
1939 pos[0] = '\0';
1940 pos = &pos[1];
1941 }
1942 match = (fnmatch(key_value, val, 0) == 0);
1943 if (match)
1944 break;
1945 key_value = pos;
1946 }
1947 break;
1948 }
1949 case GL_SOMETHING:
1950 match = (val[0] != '\0');
1951 break;
1952 case GL_UNSET:
1953 return -1;
1954 }
1955
1956 if (match && (token->key.op == OP_MATCH))
1957 return 0;
1958 if (!match && (token->key.op == OP_NOMATCH))
1959 return 0;
1960 return -1;
1961 }
1962
1963 static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur)
1964 {
1965 const char *name;
1966 char nbuf[UTIL_NAME_SIZE];
1967 const char *value;
1968 char vbuf[UTIL_NAME_SIZE];
1969 size_t len;
1970
1971 name = &rules->buf[cur->key.attr_off];
1972 switch (cur->key.attrsubst) {
1973 case SB_FORMAT:
1974 udev_event_apply_format(event, name, nbuf, sizeof(nbuf));
1975 name = nbuf;
1976 /* fall through */
1977 case SB_NONE:
1978 value = udev_device_get_sysattr_value(dev, name);
1979 if (value == NULL)
1980 return -1;
1981 break;
1982 case SB_SUBSYS:
1983 if (util_resolve_subsys_kernel(event->udev, name, vbuf, sizeof(vbuf), 1) != 0)
1984 return -1;
1985 value = vbuf;
1986 break;
1987 default:
1988 return -1;
1989 }
1990
1991 /* remove trailing whitespace, if not asked to match for it */
1992 len = strlen(value);
1993 if (len > 0 && isspace(value[len-1])) {
1994 const char *key_value;
1995 size_t klen;
1996
1997 key_value = &rules->buf[cur->key.value_off];
1998 klen = strlen(key_value);
1999 if (klen > 0 && !isspace(key_value[klen-1])) {
2000 if (value != vbuf) {
2001 util_strscpy(vbuf, sizeof(vbuf), value);
2002 value = vbuf;
2003 }
2004 while (len > 0 && isspace(vbuf[--len]))
2005 vbuf[len] = '\0';
2006 }
2007 }
2008
2009 return match_key(rules, cur, value);
2010 }
2011
2012 enum escape_type {
2013 ESCAPE_UNSET,
2014 ESCAPE_NONE,
2015 ESCAPE_REPLACE,
2016 };
2017
2018 int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event, const sigset_t *sigmask)
2019 {
2020 struct token *cur;
2021 struct token *rule;
2022 enum escape_type esc = ESCAPE_UNSET;
2023 bool can_set_name;
2024
2025 if (rules->tokens == NULL)
2026 return -1;
2027
2028 can_set_name = ((!streq(udev_device_get_action(event->dev), "remove")) &&
2029 (major(udev_device_get_devnum(event->dev)) > 0 ||
2030 udev_device_get_ifindex(event->dev) > 0));
2031
2032 /* loop through token list, match, run actions or forward to next rule */
2033 cur = &rules->tokens[0];
2034 rule = cur;
2035 for (;;) {
2036 dump_token(rules, cur);
2037 switch (cur->type) {
2038 case TK_RULE:
2039 /* current rule */
2040 rule = cur;
2041 /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
2042 if (!can_set_name && rule->rule.can_set_name)
2043 goto nomatch;
2044 esc = ESCAPE_UNSET;
2045 break;
2046 case TK_M_ACTION:
2047 if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
2048 goto nomatch;
2049 break;
2050 case TK_M_DEVPATH:
2051 if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
2052 goto nomatch;
2053 break;
2054 case TK_M_KERNEL:
2055 if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
2056 goto nomatch;
2057 break;
2058 case TK_M_DEVLINK: {
2059 struct udev_list_entry *list_entry;
2060 bool match = false;
2061
2062 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
2063 const char *devlink;
2064
2065 devlink = udev_list_entry_get_name(list_entry) + strlen("/dev/");
2066 if (match_key(rules, cur, devlink) == 0) {
2067 match = true;
2068 break;
2069 }
2070 }
2071 if (!match)
2072 goto nomatch;
2073 break;
2074 }
2075 case TK_M_NAME:
2076 if (match_key(rules, cur, event->name) != 0)
2077 goto nomatch;
2078 break;
2079 case TK_M_ENV: {
2080 const char *key_name = &rules->buf[cur->key.attr_off];
2081 const char *value;
2082
2083 value = udev_device_get_property_value(event->dev, key_name);
2084 if (value == NULL)
2085 value = "";
2086 if (match_key(rules, cur, value))
2087 goto nomatch;
2088 break;
2089 }
2090 case TK_M_TAG: {
2091 struct udev_list_entry *list_entry;
2092 bool match = false;
2093
2094 udev_list_entry_foreach(list_entry, udev_device_get_tags_list_entry(event->dev)) {
2095 if (streq(&rules->buf[cur->key.value_off], udev_list_entry_get_name(list_entry))) {
2096 match = true;
2097 break;
2098 }
2099 }
2100 if (!match && (cur->key.op != OP_NOMATCH))
2101 goto nomatch;
2102 break;
2103 }
2104 case TK_M_SUBSYSTEM:
2105 if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
2106 goto nomatch;
2107 break;
2108 case TK_M_DRIVER:
2109 if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
2110 goto nomatch;
2111 break;
2112 case TK_M_WAITFOR: {
2113 char filename[UTIL_PATH_SIZE];
2114 int found;
2115
2116 udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename));
2117 found = (wait_for_file(event->dev, filename, 10) == 0);
2118 if (!found && (cur->key.op != OP_NOMATCH))
2119 goto nomatch;
2120 break;
2121 }
2122 case TK_M_ATTR:
2123 if (match_attr(rules, event->dev, event, cur) != 0)
2124 goto nomatch;
2125 break;
2126 case TK_M_KERNELS:
2127 case TK_M_SUBSYSTEMS:
2128 case TK_M_DRIVERS:
2129 case TK_M_ATTRS:
2130 case TK_M_TAGS: {
2131 struct token *next;
2132
2133 /* get whole sequence of parent matches */
2134 next = cur;
2135 while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX)
2136 next++;
2137
2138 /* loop over parents */
2139 event->dev_parent = event->dev;
2140 for (;;) {
2141 struct token *key;
2142
2143 /* loop over sequence of parent match keys */
2144 for (key = cur; key < next; key++ ) {
2145 dump_token(rules, key);
2146 switch(key->type) {
2147 case TK_M_KERNELS:
2148 if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
2149 goto try_parent;
2150 break;
2151 case TK_M_SUBSYSTEMS:
2152 if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
2153 goto try_parent;
2154 break;
2155 case TK_M_DRIVERS:
2156 if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
2157 goto try_parent;
2158 break;
2159 case TK_M_ATTRS:
2160 if (match_attr(rules, event->dev_parent, event, key) != 0)
2161 goto try_parent;
2162 break;
2163 case TK_M_TAGS: {
2164 bool match = udev_device_has_tag(event->dev_parent, &rules->buf[cur->key.value_off]);
2165
2166 if (match && key->key.op == OP_NOMATCH)
2167 goto try_parent;
2168 if (!match && key->key.op == OP_MATCH)
2169 goto try_parent;
2170 break;
2171 }
2172 default:
2173 goto nomatch;
2174 }
2175 }
2176 break;
2177
2178 try_parent:
2179 event->dev_parent = udev_device_get_parent(event->dev_parent);
2180 if (event->dev_parent == NULL)
2181 goto nomatch;
2182 }
2183 /* move behind our sequence of parent match keys */
2184 cur = next;
2185 continue;
2186 }
2187 case TK_M_TEST: {
2188 char filename[UTIL_PATH_SIZE];
2189 struct stat statbuf;
2190 int match;
2191
2192 udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename));
2193 if (util_resolve_subsys_kernel(event->udev, filename, filename, sizeof(filename), 0) != 0) {
2194 if (filename[0] != '/') {
2195 char tmp[UTIL_PATH_SIZE];
2196
2197 util_strscpy(tmp, sizeof(tmp), filename);
2198 util_strscpyl(filename, sizeof(filename),
2199 udev_device_get_syspath(event->dev), "/", tmp, NULL);
2200 }
2201 }
2202 attr_subst_subdir(filename, sizeof(filename));
2203
2204 match = (stat(filename, &statbuf) == 0);
2205 if (match && cur->key.mode > 0)
2206 match = ((statbuf.st_mode & cur->key.mode) > 0);
2207 if (match && cur->key.op == OP_NOMATCH)
2208 goto nomatch;
2209 if (!match && cur->key.op == OP_MATCH)
2210 goto nomatch;
2211 break;
2212 }
2213 case TK_M_EVENT_TIMEOUT:
2214 log_debug("OPTIONS event_timeout=%u\n", cur->key.event_timeout);
2215 event->timeout_usec = cur->key.event_timeout * 1000 * 1000;
2216 break;
2217 case TK_M_PROGRAM: {
2218 char program[UTIL_PATH_SIZE];
2219 char **envp;
2220 char result[UTIL_PATH_SIZE];
2221
2222 free(event->program_result);
2223 event->program_result = NULL;
2224 udev_event_apply_format(event, &rules->buf[cur->key.value_off], program, sizeof(program));
2225 envp = udev_device_get_properties_envp(event->dev);
2226 log_debug("PROGRAM '%s' %s:%u\n",
2227 program,
2228 &rules->buf[rule->rule.filename_off],
2229 rule->rule.filename_line);
2230
2231 if (udev_event_spawn(event, program, envp, sigmask, result, sizeof(result)) < 0) {
2232 if (cur->key.op != OP_NOMATCH)
2233 goto nomatch;
2234 } else {
2235 int count;
2236
2237 util_remove_trailing_chars(result, '\n');
2238 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2239 count = util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
2240 if (count > 0)
2241 log_debug("%i character(s) replaced\n" , count);
2242 }
2243 event->program_result = strdup(result);
2244 if (cur->key.op == OP_NOMATCH)
2245 goto nomatch;
2246 }
2247 break;
2248 }
2249 case TK_M_IMPORT_FILE: {
2250 char import[UTIL_PATH_SIZE];
2251
2252 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2253 if (import_file_into_properties(event->dev, import) != 0)
2254 if (cur->key.op != OP_NOMATCH)
2255 goto nomatch;
2256 break;
2257 }
2258 case TK_M_IMPORT_PROG: {
2259 char import[UTIL_PATH_SIZE];
2260
2261 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2262 log_debug("IMPORT '%s' %s:%u\n",
2263 import,
2264 &rules->buf[rule->rule.filename_off],
2265 rule->rule.filename_line);
2266
2267 if (import_program_into_properties(event, import, sigmask) != 0)
2268 if (cur->key.op != OP_NOMATCH)
2269 goto nomatch;
2270 break;
2271 }
2272 case TK_M_IMPORT_BUILTIN: {
2273 char command[UTIL_PATH_SIZE];
2274
2275 if (udev_builtin_run_once(cur->key.builtin_cmd)) {
2276 /* check if we ran already */
2277 if (event->builtin_run & (1 << cur->key.builtin_cmd)) {
2278 log_debug("IMPORT builtin skip '%s' %s:%u\n",
2279 udev_builtin_name(cur->key.builtin_cmd),
2280 &rules->buf[rule->rule.filename_off],
2281 rule->rule.filename_line);
2282 /* return the result from earlier run */
2283 if (event->builtin_ret & (1 << cur->key.builtin_cmd))
2284 if (cur->key.op != OP_NOMATCH)
2285 goto nomatch;
2286 break;
2287 }
2288 /* mark as ran */
2289 event->builtin_run |= (1 << cur->key.builtin_cmd);
2290 }
2291
2292 udev_event_apply_format(event, &rules->buf[cur->key.value_off], command, sizeof(command));
2293 log_debug("IMPORT builtin '%s' %s:%u\n",
2294 udev_builtin_name(cur->key.builtin_cmd),
2295 &rules->buf[rule->rule.filename_off],
2296 rule->rule.filename_line);
2297
2298 if (udev_builtin_run(event->dev, cur->key.builtin_cmd, command, false) != 0) {
2299 /* remember failure */
2300 log_debug("IMPORT builtin '%s' returned non-zero\n",
2301 udev_builtin_name(cur->key.builtin_cmd));
2302 event->builtin_ret |= (1 << cur->key.builtin_cmd);
2303 if (cur->key.op != OP_NOMATCH)
2304 goto nomatch;
2305 }
2306 break;
2307 }
2308 case TK_M_IMPORT_DB: {
2309 const char *key = &rules->buf[cur->key.value_off];
2310 const char *value;
2311
2312 value = udev_device_get_property_value(event->dev_db, key);
2313 if (value != NULL) {
2314 struct udev_list_entry *entry;
2315
2316 entry = udev_device_add_property(event->dev, key, value);
2317 udev_list_entry_set_num(entry, true);
2318 } else {
2319 if (cur->key.op != OP_NOMATCH)
2320 goto nomatch;
2321 }
2322 break;
2323 }
2324 case TK_M_IMPORT_CMDLINE: {
2325 FILE *f;
2326 bool imported = false;
2327
2328 f = fopen("/proc/cmdline", "re");
2329 if (f != NULL) {
2330 char cmdline[4096];
2331
2332 if (fgets(cmdline, sizeof(cmdline), f) != NULL) {
2333 const char *key = &rules->buf[cur->key.value_off];
2334 char *pos;
2335
2336 pos = strstr(cmdline, key);
2337 if (pos != NULL) {
2338 struct udev_list_entry *entry;
2339
2340 pos += strlen(key);
2341 if (pos[0] == '\0' || isspace(pos[0])) {
2342 /* we import simple flags as 'FLAG=1' */
2343 entry = udev_device_add_property(event->dev, key, "1");
2344 udev_list_entry_set_num(entry, true);
2345 imported = true;
2346 } else if (pos[0] == '=') {
2347 const char *value;
2348
2349 pos++;
2350 value = pos;
2351 while (pos[0] != '\0' && !isspace(pos[0]))
2352 pos++;
2353 pos[0] = '\0';
2354 entry = udev_device_add_property(event->dev, key, value);
2355 udev_list_entry_set_num(entry, true);
2356 imported = true;
2357 }
2358 }
2359 }
2360 fclose(f);
2361 }
2362 if (!imported && cur->key.op != OP_NOMATCH)
2363 goto nomatch;
2364 break;
2365 }
2366 case TK_M_IMPORT_PARENT: {
2367 char import[UTIL_PATH_SIZE];
2368
2369 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2370 if (import_parent_into_properties(event->dev, import) != 0)
2371 if (cur->key.op != OP_NOMATCH)
2372 goto nomatch;
2373 break;
2374 }
2375 case TK_M_RESULT:
2376 if (match_key(rules, cur, event->program_result) != 0)
2377 goto nomatch;
2378 break;
2379 case TK_A_STRING_ESCAPE_NONE:
2380 esc = ESCAPE_NONE;
2381 break;
2382 case TK_A_STRING_ESCAPE_REPLACE:
2383 esc = ESCAPE_REPLACE;
2384 break;
2385 case TK_A_DB_PERSIST:
2386 udev_device_set_db_persist(event->dev);
2387 break;
2388 case TK_A_INOTIFY_WATCH:
2389 if (event->inotify_watch_final)
2390 break;
2391 if (cur->key.op == OP_ASSIGN_FINAL)
2392 event->inotify_watch_final = true;
2393 event->inotify_watch = cur->key.watch;
2394 break;
2395 case TK_A_DEVLINK_PRIO:
2396 udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
2397 break;
2398 case TK_A_OWNER: {
2399 char owner[UTIL_NAME_SIZE];
2400
2401 if (event->owner_final)
2402 break;
2403 if (cur->key.op == OP_ASSIGN_FINAL)
2404 event->owner_final = true;
2405 udev_event_apply_format(event, &rules->buf[cur->key.value_off], owner, sizeof(owner));
2406 event->uid = util_lookup_user(event->udev, owner);
2407 log_debug("OWNER %u %s:%u\n",
2408 event->uid,
2409 &rules->buf[rule->rule.filename_off],
2410 rule->rule.filename_line);
2411 break;
2412 }
2413 case TK_A_GROUP: {
2414 char group[UTIL_NAME_SIZE];
2415
2416 if (event->group_final)
2417 break;
2418 if (cur->key.op == OP_ASSIGN_FINAL)
2419 event->group_final = true;
2420 udev_event_apply_format(event, &rules->buf[cur->key.value_off], group, sizeof(group));
2421 event->gid = util_lookup_group(event->udev, group);
2422 log_debug("GROUP %u %s:%u\n",
2423 event->gid,
2424 &rules->buf[rule->rule.filename_off],
2425 rule->rule.filename_line);
2426 break;
2427 }
2428 case TK_A_MODE: {
2429 char mode_str[UTIL_NAME_SIZE];
2430 mode_t mode;
2431 char *endptr;
2432
2433 if (event->mode_final)
2434 break;
2435 udev_event_apply_format(event, &rules->buf[cur->key.value_off], mode_str, sizeof(mode_str));
2436 mode = strtol(mode_str, &endptr, 8);
2437 if (endptr[0] != '\0') {
2438 log_error("ignoring invalid mode '%s'\n", mode_str);
2439 break;
2440 }
2441 if (cur->key.op == OP_ASSIGN_FINAL)
2442 event->mode_final = true;
2443 event->mode_set = true;
2444 event->mode = mode;
2445 log_debug("MODE %#o %s:%u\n",
2446 event->mode,
2447 &rules->buf[rule->rule.filename_off],
2448 rule->rule.filename_line);
2449 break;
2450 }
2451 case TK_A_OWNER_ID:
2452 if (event->owner_final)
2453 break;
2454 if (cur->key.op == OP_ASSIGN_FINAL)
2455 event->owner_final = true;
2456 event->uid = cur->key.uid;
2457 log_debug("OWNER %u %s:%u\n",
2458 event->uid,
2459 &rules->buf[rule->rule.filename_off],
2460 rule->rule.filename_line);
2461 break;
2462 case TK_A_GROUP_ID:
2463 if (event->group_final)
2464 break;
2465 if (cur->key.op == OP_ASSIGN_FINAL)
2466 event->group_final = true;
2467 event->gid = cur->key.gid;
2468 log_debug("GROUP %u %s:%u\n",
2469 event->gid,
2470 &rules->buf[rule->rule.filename_off],
2471 rule->rule.filename_line);
2472 break;
2473 case TK_A_MODE_ID:
2474 if (event->mode_final)
2475 break;
2476 if (cur->key.op == OP_ASSIGN_FINAL)
2477 event->mode_final = true;
2478 event->mode_set = true;
2479 event->mode = cur->key.mode;
2480 log_debug("MODE %#o %s:%u\n",
2481 event->mode,
2482 &rules->buf[rule->rule.filename_off],
2483 rule->rule.filename_line);
2484 break;
2485 case TK_A_ENV: {
2486 const char *name = &rules->buf[cur->key.attr_off];
2487 char *value = &rules->buf[cur->key.value_off];
2488
2489 if (value[0] != '\0') {
2490 char temp_value[UTIL_NAME_SIZE];
2491 struct udev_list_entry *entry;
2492
2493 udev_event_apply_format(event, value, temp_value, sizeof(temp_value));
2494 entry = udev_device_add_property(event->dev, name, temp_value);
2495 /* store in db, skip private keys */
2496 if (name[0] != '.')
2497 udev_list_entry_set_num(entry, true);
2498 } else {
2499 udev_device_add_property(event->dev, name, NULL);
2500 }
2501 break;
2502 }
2503 case TK_A_TAG: {
2504 char tag[UTIL_PATH_SIZE];
2505 const char *p;
2506
2507 udev_event_apply_format(event, &rules->buf[cur->key.value_off], tag, sizeof(tag));
2508 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2509 udev_device_cleanup_tags_list(event->dev);
2510 for (p = tag; *p != '\0'; p++) {
2511 if ((*p >= 'a' && *p <= 'z') ||
2512 (*p >= 'A' && *p <= 'Z') ||
2513 (*p >= '0' && *p <= '9') ||
2514 *p == '-' || *p == '_')
2515 continue;
2516 log_error("ignoring invalid tag name '%s'\n", tag);
2517 break;
2518 }
2519 udev_device_add_tag(event->dev, tag);
2520 break;
2521 }
2522 case TK_A_NAME: {
2523 const char *name = &rules->buf[cur->key.value_off];
2524
2525 char name_str[UTIL_PATH_SIZE];
2526 int count;
2527
2528 if (event->name_final)
2529 break;
2530 if (cur->key.op == OP_ASSIGN_FINAL)
2531 event->name_final = true;
2532 udev_event_apply_format(event, name, name_str, sizeof(name_str));
2533 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2534 count = util_replace_chars(name_str, "/");
2535 if (count > 0)
2536 log_debug("%i character(s) replaced\n", count);
2537 }
2538 if (major(udev_device_get_devnum(event->dev)) &&
2539 (!streq(name_str, udev_device_get_devnode(event->dev) + strlen("/dev/")))) {
2540 log_error("NAME=\"%s\" ignored, kernel device nodes "
2541 "can not be renamed; please fix it in %s:%u\n", name,
2542 &rules->buf[rule->rule.filename_off], rule->rule.filename_line);
2543 break;
2544 }
2545 free(event->name);
2546 event->name = strdup(name_str);
2547 log_debug("NAME '%s' %s:%u\n",
2548 event->name,
2549 &rules->buf[rule->rule.filename_off],
2550 rule->rule.filename_line);
2551 break;
2552 }
2553 case TK_A_DEVLINK: {
2554 char temp[UTIL_PATH_SIZE];
2555 char filename[UTIL_PATH_SIZE];
2556 char *pos, *next;
2557 int count = 0;
2558
2559 if (event->devlink_final)
2560 break;
2561 if (major(udev_device_get_devnum(event->dev)) == 0)
2562 break;
2563 if (cur->key.op == OP_ASSIGN_FINAL)
2564 event->devlink_final = true;
2565 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2566 udev_device_cleanup_devlinks_list(event->dev);
2567
2568 /* allow multiple symlinks separated by spaces */
2569 udev_event_apply_format(event, &rules->buf[cur->key.value_off], temp, sizeof(temp));
2570 if (esc == ESCAPE_UNSET)
2571 count = util_replace_chars(temp, "/ ");
2572 else if (esc == ESCAPE_REPLACE)
2573 count = util_replace_chars(temp, "/");
2574 if (count > 0)
2575 log_debug("%i character(s) replaced\n" , count);
2576 pos = temp;
2577 while (isspace(pos[0]))
2578 pos++;
2579 next = strchr(pos, ' ');
2580 while (next != NULL) {
2581 next[0] = '\0';
2582 log_debug("LINK '%s' %s:%u\n", pos,
2583 &rules->buf[rule->rule.filename_off], rule->rule.filename_line);
2584 util_strscpyl(filename, sizeof(filename), "/dev/", pos, NULL);
2585 udev_device_add_devlink(event->dev, filename, cur->key.devlink_unique);
2586 while (isspace(next[1]))
2587 next++;
2588 pos = &next[1];
2589 next = strchr(pos, ' ');
2590 }
2591 if (pos[0] != '\0') {
2592 log_debug("LINK '%s' %s:%u\n", pos,
2593 &rules->buf[rule->rule.filename_off], rule->rule.filename_line);
2594 util_strscpyl(filename, sizeof(filename), "/dev/", pos, NULL);
2595 udev_device_add_devlink(event->dev, filename, cur->key.devlink_unique);
2596 }
2597 break;
2598 }
2599 case TK_A_ATTR: {
2600 const char *key_name = &rules->buf[cur->key.attr_off];
2601 char attr[UTIL_PATH_SIZE];
2602 char value[UTIL_NAME_SIZE];
2603 FILE *f;
2604
2605 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0)
2606 util_strscpyl(attr, sizeof(attr), udev_device_get_syspath(event->dev), "/", key_name, NULL);
2607 attr_subst_subdir(attr, sizeof(attr));
2608
2609 udev_event_apply_format(event, &rules->buf[cur->key.value_off], value, sizeof(value));
2610 log_debug("ATTR '%s' writing '%s' %s:%u\n", attr, value,
2611 &rules->buf[rule->rule.filename_off],
2612 rule->rule.filename_line);
2613 f = fopen(attr, "we");
2614 if (f != NULL) {
2615 if (fprintf(f, "%s", value) <= 0)
2616 log_error("error writing ATTR{%s}: %m\n", attr);
2617 fclose(f);
2618 } else {
2619 log_error("error opening ATTR{%s} for writing: %m\n", attr);
2620 }
2621 break;
2622 }
2623 case TK_A_RUN_BUILTIN:
2624 case TK_A_RUN_PROGRAM: {
2625 struct udev_list_entry *entry;
2626
2627 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2628 udev_list_cleanup(&event->run_list);
2629 log_debug("RUN '%s' %s:%u\n",
2630 &rules->buf[cur->key.value_off],
2631 &rules->buf[rule->rule.filename_off],
2632 rule->rule.filename_line);
2633 entry = udev_list_entry_add(&event->run_list, &rules->buf[cur->key.value_off], NULL);
2634 udev_list_entry_set_num(entry, cur->key.builtin_cmd);
2635 break;
2636 }
2637 case TK_A_GOTO:
2638 if (cur->key.rule_goto == 0)
2639 break;
2640 cur = &rules->tokens[cur->key.rule_goto];
2641 continue;
2642 case TK_END:
2643 return 0;
2644
2645 case TK_M_PARENTS_MIN:
2646 case TK_M_PARENTS_MAX:
2647 case TK_M_MAX:
2648 case TK_UNSET:
2649 log_error("wrong type %u\n", cur->type);
2650 goto nomatch;
2651 }
2652
2653 cur++;
2654 continue;
2655 nomatch:
2656 /* fast-forward to next rule */
2657 cur = rule + rule->rule.token_count;
2658 }
2659 }
2660
2661 void udev_rules_apply_static_dev_perms(struct udev_rules *rules)
2662 {
2663 struct token *cur;
2664 struct token *rule;
2665 uid_t uid = 0;
2666 gid_t gid = 0;
2667 mode_t mode = 0;
2668
2669 if (rules->tokens == NULL)
2670 return;
2671
2672 cur = &rules->tokens[0];
2673 rule = cur;
2674 for (;;) {
2675 switch (cur->type) {
2676 case TK_RULE:
2677 /* current rule */
2678 rule = cur;
2679
2680 /* skip rules without a static_node tag */
2681 if (!rule->rule.has_static_node)
2682 goto next;
2683
2684 uid = 0;
2685 gid = 0;
2686 mode = 0;
2687 break;
2688 case TK_A_OWNER_ID:
2689 uid = cur->key.uid;
2690 break;
2691 case TK_A_GROUP_ID:
2692 gid = cur->key.gid;
2693 break;
2694 case TK_A_MODE_ID:
2695 mode = cur->key.mode;
2696 break;
2697 case TK_A_STATIC_NODE: {
2698 char filename[UTIL_PATH_SIZE];
2699 struct stat stats;
2700
2701 /* we assure, that the permissions tokens are sorted before the static token */
2702 if (mode == 0 && uid == 0 && gid == 0)
2703 goto next;
2704 util_strscpyl(filename, sizeof(filename), "/dev/",
2705 &rules->buf[cur->key.value_off], NULL);
2706 if (stat(filename, &stats) != 0)
2707 goto next;
2708 if (!S_ISBLK(stats.st_mode) && !S_ISCHR(stats.st_mode))
2709 goto next;
2710 if (mode == 0) {
2711 if (gid > 0)
2712 mode = 0660;
2713 else
2714 mode = 0600;
2715 }
2716 if (mode != (stats.st_mode & 01777)) {
2717 chmod(filename, mode);
2718 log_debug("chmod '%s' %#o\n", filename, mode);
2719 }
2720
2721 if ((uid != 0 && uid != stats.st_uid) || (gid != 0 && gid != stats.st_gid)) {
2722 chown(filename, uid, gid);
2723 log_debug("chown '%s' %u %u\n", filename, uid, gid);
2724 }
2725
2726 utimensat(AT_FDCWD, filename, NULL, 0);
2727 break;
2728 }
2729 case TK_END:
2730 return;
2731 }
2732
2733 cur++;
2734 continue;
2735 next:
2736 /* fast-forward to next rule */
2737 cur = rule + rule->rule.token_count;
2738 continue;
2739 }
2740 }
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