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[thirdparty/systemd.git] / udev / udev-rules.c
1 /*
2 * Copyright (C) 2008 Kay Sievers <kay.sievers@vrfy.org>
3 *
4 * This program is free software: you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation, either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <http://www.gnu.org/licenses/>.
16 */
17
18 #include <stddef.h>
19 #include <stdlib.h>
20 #include <string.h>
21 #include <stdio.h>
22 #include <fcntl.h>
23 #include <ctype.h>
24 #include <unistd.h>
25 #include <errno.h>
26 #include <dirent.h>
27 #include <fnmatch.h>
28
29 #include "udev.h"
30
31 #define PREALLOC_TOKEN 2048
32 #define PREALLOC_STRBUF 32 * 1024
33
34 enum key_operation {
35 KEY_OP_UNSET,
36 KEY_OP_MATCH,
37 KEY_OP_NOMATCH,
38 KEY_OP_ADD,
39 KEY_OP_ASSIGN,
40 KEY_OP_ASSIGN_FINAL,
41 };
42
43 static const char *operation_str[] = {
44 [KEY_OP_MATCH] = "match",
45 [KEY_OP_NOMATCH] = "nomatch",
46 [KEY_OP_ADD] = "add",
47 [KEY_OP_ASSIGN] = "assign",
48 [KEY_OP_ASSIGN_FINAL] = "assign-final",
49 };
50
51 enum token_type {
52 TK_UNDEF,
53 TK_RULE,
54
55 TK_M_WAITFOR, /* val */
56 TK_M_ACTION, /* val */
57 TK_M_DEVPATH, /* val */
58 TK_M_KERNEL, /* val */
59 TK_M_DEVLINK, /* val */
60 TK_M_NAME, /* val */
61 TK_M_ENV, /* val, attr */
62 TK_M_SUBSYSTEM, /* val */
63 TK_M_DRIVER, /* val */
64 TK_M_ATTR, /* val, attr */
65
66 TK_M_KERNELS, /* val */
67 TK_M_SUBSYSTEMS, /* val */
68 TK_M_DRIVERS, /* val */
69 TK_M_ATTRS, /* val, attr */
70 TK_PARENTS_MAX,
71
72 TK_M_TEST, /* val, mode_t */
73 TK_M_PROGRAM, /* val */
74 TK_M_IMPORT_FILE, /* val */
75 TK_M_IMPORT_PROG, /* val */
76 TK_M_IMPORT_PARENT, /* val */
77 TK_M_RESULT, /* val */
78
79 TK_A_IGNORE_DEVICE,
80 TK_A_STRING_ESCAPE_NONE,
81 TK_A_STRING_ESCAPE_REPLACE,
82 TK_A_NUM_FAKE_PART, /* int */
83 TK_A_DEVLINK_PRIO, /* int */
84 TK_A_OWNER, /* val */
85 TK_A_GROUP, /* val */
86 TK_A_MODE, /* val */
87 TK_A_OWNER_ID, /* uid_t */
88 TK_A_GROUP_ID, /* gid_t */
89 TK_A_MODE_ID, /* mode_t */
90 TK_A_ENV, /* val, attr */
91 TK_A_NAME, /* val */
92 TK_A_DEVLINK, /* val */
93 TK_A_EVENT_TIMEOUT, /* int */
94 TK_A_IGNORE_REMOVE,
95 TK_A_ATTR, /* val, attr */
96 TK_A_RUN, /* val, bool */
97 TK_A_GOTO, /* size_t */
98 TK_A_LAST_RULE,
99
100 TK_END,
101 };
102
103 static const char *token_str[] = {
104 [TK_UNDEF] = "UNDEF",
105 [TK_RULE] = "RULE",
106
107 [TK_M_WAITFOR] = "M WAITFOR",
108 [TK_M_ACTION] = "M ACTION",
109 [TK_M_DEVPATH] = "M DEVPATH",
110 [TK_M_KERNEL] = "M KERNEL",
111 [TK_M_DEVLINK] = "M DEVLINK",
112 [TK_M_NAME] = "M NAME",
113 [TK_M_ENV] = "M ENV",
114 [TK_M_SUBSYSTEM] = "M SUBSYSTEM",
115 [TK_M_DRIVER] = "M DRIVER",
116 [TK_M_ATTR] = "M ATTR",
117
118 [TK_M_KERNELS] = "M KERNELS",
119 [TK_M_SUBSYSTEMS] = "M SUBSYSTEMS",
120 [TK_M_DRIVERS] = "M DRIVERS",
121 [TK_M_ATTRS] = "M ATTRS",
122 [TK_PARENTS_MAX] = "PARENTS_MAX",
123
124 [TK_M_TEST] = "M TEST",
125 [TK_M_PROGRAM] = "M PROGRAM",
126 [TK_M_IMPORT_FILE] = "M IMPORT_FILE",
127 [TK_M_IMPORT_PROG] = "M IMPORT_PROG",
128 [TK_M_IMPORT_PARENT] = "M MPORT_PARENT",
129 [TK_M_RESULT] = "M RESULT",
130
131 [TK_A_IGNORE_DEVICE] = "A IGNORE_DEVICE",
132 [TK_A_STRING_ESCAPE_NONE] = "A STRING_ESCAPE_NONE",
133 [TK_A_STRING_ESCAPE_REPLACE] = "A STRING_ESCAPE_REPLACE",
134 [TK_A_NUM_FAKE_PART] = "A NUM_FAKE_PART",
135 [TK_A_DEVLINK_PRIO] = "A DEVLINK_PRIO",
136 [TK_A_OWNER] = "A OWNER",
137 [TK_A_GROUP] = "A GROUP",
138 [TK_A_MODE] = "A MODE",
139 [TK_A_OWNER_ID] = "A OWNER_ID",
140 [TK_A_GROUP_ID] = "A GROUP_ID",
141 [TK_A_MODE_ID] = "A MODE_ID",
142 [TK_A_ENV] = "A ENV",
143 [TK_A_NAME] = "A NAME",
144 [TK_A_DEVLINK] = "A DEVLINK",
145 [TK_A_EVENT_TIMEOUT] = "A EVENT_TIMEOUT",
146 [TK_A_IGNORE_REMOVE] = "A IGNORE_REMOVE",
147 [TK_A_ATTR] = "A ATTR",
148 [TK_A_RUN] = "A RUN",
149 [TK_A_GOTO] = "A GOTO",
150 [TK_A_LAST_RULE] = "A LAST_RULE",
151
152 [TK_END] = "END",
153 };
154
155 struct token {
156 enum token_type type;
157 union {
158 struct {
159 unsigned int next_rule;
160 unsigned int label_off;
161 unsigned int filename_off;
162 } rule;
163 struct {
164 enum key_operation op;
165 unsigned int value_off;
166 union {
167 unsigned int attr_off;
168 int ignore_error;
169 int i;
170 unsigned int rule_goto;
171 mode_t mode;
172 uid_t uid;
173 gid_t gid;
174 int num_fake_part;
175 int devlink_prio;
176 int event_timeout;
177 };
178 } key;
179 };
180 };
181
182 #define MAX_TK 64
183 struct rule_tmp {
184 struct udev_rules *rules;
185 struct token rule;
186 struct token token[MAX_TK];
187 unsigned int token_cur;
188 };
189
190 struct udev_rules {
191 struct udev *udev;
192 int resolve_names;
193 struct token *tokens;
194 unsigned int token_cur;
195 unsigned int token_max;
196 char *buf;
197 size_t buf_cur;
198 size_t buf_max;
199 unsigned int buf_count;
200 };
201
202 /* we could lookup and return existing strings, or tails of strings */
203 static int add_string(struct udev_rules *rules, const char *str)
204 {
205 size_t len = strlen(str)+1;
206 int off;
207
208 if (rules->buf_cur + len+1 >= rules->buf_max) {
209 char *buf;
210 unsigned int add;
211
212 /* double the buffer size */
213 add = rules->buf_max;
214 if (add < len)
215 add = len;
216
217 buf = realloc(rules->buf, rules->buf_max + add);
218 if (buf == NULL)
219 return -1;
220 info(rules->udev, "extend buffer from %zu to %zu\n", rules->buf_max, rules->buf_max + add);
221 rules->buf = buf;
222 rules->buf_max += add;
223 }
224 off = rules->buf_cur;
225 memcpy(&rules->buf[rules->buf_cur], str, len);
226 rules->buf_cur += len;
227 rules->buf_count++;
228 return off;
229 }
230
231 static int add_token(struct udev_rules *rules, struct token *token)
232 {
233
234 if (rules->token_cur+1 >= rules->token_max) {
235 struct token *tokens;
236 unsigned int add;
237
238 /* double the buffer size */
239 add = rules->token_max;
240 if (add < 1)
241 add = 1;
242
243 tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
244 if (tokens == NULL)
245 return -1;
246 info(rules->udev, "extend tokens from %u to %u\n", rules->token_max, rules->token_max + add);
247 rules->tokens = tokens;
248 rules->token_max += add;
249 }
250 memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
251 rules->token_cur++;
252 return 0;
253 }
254
255 static int import_property_from_string(struct udev_device *dev, char *line)
256 {
257 struct udev *udev = udev_device_get_udev(dev);
258 char *key;
259 char *val;
260 size_t len;
261
262 /* find key */
263 key = line;
264 while (isspace(key[0]))
265 key++;
266
267 /* comment or empty line */
268 if (key[0] == '#' || key[0] == '\0')
269 return -1;
270
271 /* split key/value */
272 val = strchr(key, '=');
273 if (val == NULL)
274 return -1;
275 val[0] = '\0';
276 val++;
277
278 /* find value */
279 while (isspace(val[0]))
280 val++;
281
282 /* terminate key */
283 len = strlen(key);
284 if (len == 0)
285 return -1;
286 while (isspace(key[len-1]))
287 len--;
288 key[len] = '\0';
289
290 /* terminate value */
291 len = strlen(val);
292 if (len == 0)
293 return -1;
294 while (isspace(val[len-1]))
295 len--;
296 val[len] = '\0';
297
298 if (len == 0)
299 return -1;
300
301 /* unquote */
302 if (val[0] == '"' || val[0] == '\'') {
303 if (val[len-1] != val[0]) {
304 info(udev, "inconsistent quoting: '%s', skip\n", line);
305 return -1;
306 }
307 val[len-1] = '\0';
308 val++;
309 }
310
311 info(udev, "adding '%s'='%s'\n", key, val);
312
313 /* handle device, renamed by external tool, returning new path */
314 if (strcmp(key, "DEVPATH") == 0) {
315 char syspath[UTIL_PATH_SIZE];
316
317 info(udev, "updating devpath from '%s' to '%s'\n",
318 udev_device_get_devpath(dev), val);
319 util_strlcpy(syspath, udev_get_sys_path(udev), sizeof(syspath));
320 util_strlcat(syspath, val, sizeof(syspath));
321 udev_device_set_syspath(dev, syspath);
322 } else {
323 struct udev_list_entry *entry;
324
325 entry = udev_device_add_property(dev, key, val);
326 /* store in db */
327 udev_list_entry_set_flag(entry, 1);
328 }
329 return 0;
330 }
331
332 static int import_file_into_properties(struct udev_device *dev, const char *filename)
333 {
334 FILE *f;
335 char line[UTIL_LINE_SIZE];
336
337 f = fopen(filename, "r");
338 if (f == NULL)
339 return -1;
340 while (fgets(line, sizeof(line), f) != NULL)
341 import_property_from_string(dev, line);
342 fclose(f);
343 return 0;
344 }
345
346 static int import_program_into_properties(struct udev_device *dev, const char *program)
347 {
348 struct udev *udev = udev_device_get_udev(dev);
349 char **envp;
350 char result[2048];
351 size_t reslen;
352 char *line;
353
354 envp = udev_device_get_properties_envp(dev);
355 if (util_run_program(udev, program, envp, result, sizeof(result), &reslen) != 0)
356 return -1;
357
358 line = result;
359 while (line != NULL) {
360 char *pos;
361
362 pos = strchr(line, '\n');
363 if (pos != NULL) {
364 pos[0] = '\0';
365 pos = &pos[1];
366 }
367 import_property_from_string(dev, line);
368 line = pos;
369 }
370 return 0;
371 }
372
373 static int import_parent_into_properties(struct udev_device *dev, const char *filter)
374 {
375 struct udev *udev = udev_device_get_udev(dev);
376 struct udev_device *dev_parent;
377 struct udev_list_entry *list_entry;
378
379 dev_parent = udev_device_get_parent(dev);
380 if (dev_parent == NULL)
381 return -1;
382
383 dbg(udev, "found parent '%s', get the node name\n", udev_device_get_syspath(dev_parent));
384 udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
385 const char *key = udev_list_entry_get_name(list_entry);
386 const char *val = udev_list_entry_get_value(list_entry);
387
388 if (fnmatch(filter, key, 0) == 0) {
389 struct udev_list_entry *entry;
390
391 dbg(udev, "import key '%s=%s'\n", key, val);
392 entry = udev_device_add_property(dev, key, val);
393 /* store in db */
394 udev_list_entry_set_flag(entry, 1);
395 }
396 }
397 return 0;
398 }
399
400 #define WAIT_LOOP_PER_SECOND 50
401 static int wait_for_file(struct udev_device *dev, const char *file, int timeout)
402 {
403 struct udev *udev = udev_device_get_udev(dev);
404 char filepath[UTIL_PATH_SIZE];
405 char devicepath[UTIL_PATH_SIZE] = "";
406 struct stat stats;
407 int loop = timeout * WAIT_LOOP_PER_SECOND;
408
409 /* a relative path is a device attribute */
410 if (file[0] != '/') {
411 util_strlcpy(devicepath, udev_get_sys_path(udev), sizeof(devicepath));
412 util_strlcat(devicepath, udev_device_get_devpath(dev), sizeof(devicepath));
413
414 util_strlcpy(filepath, devicepath, sizeof(filepath));
415 util_strlcat(filepath, "/", sizeof(filepath));
416 util_strlcat(filepath, file, sizeof(filepath));
417 file = filepath;
418 }
419
420 dbg(udev, "will wait %i sec for '%s'\n", timeout, file);
421 while (--loop) {
422 /* lookup file */
423 if (stat(file, &stats) == 0) {
424 info(udev, "file '%s' appeared after %i loops\n", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
425 return 0;
426 }
427 /* make sure, the device did not disappear in the meantime */
428 if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
429 info(udev, "device disappeared while waiting for '%s'\n", file);
430 return -2;
431 }
432 info(udev, "wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND);
433 usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND);
434 }
435 info(udev, "waiting for '%s' failed\n", file);
436 return -1;
437 }
438
439 static int attr_subst_subdir(char *attr, size_t len)
440 {
441 char *pos;
442 int found = 0;
443
444 pos = strstr(attr, "/*/");
445 if (pos != NULL) {
446 char str[UTIL_PATH_SIZE];
447 DIR *dir;
448
449 pos[1] = '\0';
450 util_strlcpy(str, &pos[2], sizeof(str));
451 dir = opendir(attr);
452 if (dir != NULL) {
453 struct dirent *dent;
454
455 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
456 struct stat stats;
457
458 if (dent->d_name[0] == '.')
459 continue;
460 util_strlcat(attr, dent->d_name, len);
461 util_strlcat(attr, str, len);
462 if (stat(attr, &stats) == 0) {
463 found = 1;
464 break;
465 }
466 pos[1] = '\0';
467 }
468 closedir(dir);
469 }
470 if (!found)
471 util_strlcat(attr, str, len);
472 }
473
474 return found;
475 }
476
477 static int get_key(struct udev *udev, char **line, char **key, enum key_operation *op, char **value)
478 {
479 char *linepos;
480 char *temp;
481
482 linepos = *line;
483 if (linepos == NULL && linepos[0] == '\0')
484 return -1;
485
486 /* skip whitespace */
487 while (isspace(linepos[0]) || linepos[0] == ',')
488 linepos++;
489
490 /* get the key */
491 if (linepos[0] == '\0')
492 return -1;
493 *key = linepos;
494
495 while (1) {
496 linepos++;
497 if (linepos[0] == '\0')
498 return -1;
499 if (isspace(linepos[0]))
500 break;
501 if (linepos[0] == '=')
502 break;
503 if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
504 if (linepos[1] == '=')
505 break;
506 }
507
508 /* remember end of key */
509 temp = linepos;
510
511 /* skip whitespace after key */
512 while (isspace(linepos[0]))
513 linepos++;
514 if (linepos[0] == '\0')
515 return -1;
516
517 /* get operation type */
518 if (linepos[0] == '=' && linepos[1] == '=') {
519 *op = KEY_OP_MATCH;
520 linepos += 2;
521 } else if (linepos[0] == '!' && linepos[1] == '=') {
522 *op = KEY_OP_NOMATCH;
523 linepos += 2;
524 } else if (linepos[0] == '+' && linepos[1] == '=') {
525 *op = KEY_OP_ADD;
526 linepos += 2;
527 } else if (linepos[0] == '=') {
528 *op = KEY_OP_ASSIGN;
529 linepos++;
530 } else if (linepos[0] == ':' && linepos[1] == '=') {
531 *op = KEY_OP_ASSIGN_FINAL;
532 linepos += 2;
533 } else
534 return -1;
535
536 /* terminate key */
537 temp[0] = '\0';
538
539 /* skip whitespace after operator */
540 while (isspace(linepos[0]))
541 linepos++;
542 if (linepos[0] == '\0')
543 return -1;
544
545 /* get the value*/
546 if (linepos[0] == '"')
547 linepos++;
548 else
549 return -1;
550 *value = linepos;
551
552 temp = strchr(linepos, '"');
553 if (!temp)
554 return -1;
555 temp[0] = '\0';
556 temp++;
557 dbg(udev, "%s '%s'-'%s'\n", operation_str[*op], *key, *value);
558
559 /* move line to next key */
560 *line = temp;
561 return 0;
562 }
563
564 /* extract possible KEY{attr} */
565 static char *get_key_attribute(struct udev *udev, char *str)
566 {
567 char *pos;
568 char *attr;
569
570 attr = strchr(str, '{');
571 if (attr != NULL) {
572 attr++;
573 pos = strchr(attr, '}');
574 if (pos == NULL) {
575 err(udev, "missing closing brace for format\n");
576 return NULL;
577 }
578 pos[0] = '\0';
579 dbg(udev, "attribute='%s'\n", attr);
580 return attr;
581 }
582 return NULL;
583 }
584
585 static int rule_add_token(struct rule_tmp *rule_tmp, enum token_type type,
586 enum key_operation op,
587 const char *value, const void *data)
588 {
589 struct token *token = &rule_tmp->token[rule_tmp->token_cur];
590 const char *attr = data;
591 mode_t mode = 0000;
592
593 switch (type) {
594 case TK_M_WAITFOR:
595 case TK_M_ACTION:
596 case TK_M_DEVPATH:
597 case TK_M_KERNEL:
598 case TK_M_SUBSYSTEM:
599 case TK_M_DRIVER:
600 case TK_M_DEVLINK:
601 case TK_M_NAME:
602 case TK_M_KERNELS:
603 case TK_M_SUBSYSTEMS:
604 case TK_M_DRIVERS:
605 case TK_M_PROGRAM:
606 case TK_M_IMPORT_FILE:
607 case TK_M_IMPORT_PROG:
608 case TK_M_IMPORT_PARENT:
609 case TK_M_RESULT:
610 case TK_A_OWNER:
611 case TK_A_GROUP:
612 case TK_A_MODE:
613 case TK_A_NAME:
614 case TK_A_DEVLINK:
615 case TK_A_GOTO:
616 token->key.value_off = add_string(rule_tmp->rules, value);
617 break;
618 case TK_M_ENV:
619 case TK_M_ATTR:
620 case TK_M_ATTRS:
621 case TK_A_ATTR:
622 case TK_A_ENV:
623 token->key.value_off = add_string(rule_tmp->rules, value);
624 token->key.attr_off = add_string(rule_tmp->rules, attr);
625 break;
626 case TK_M_TEST:
627 if (data != NULL)
628 mode = *(mode_t *)data;
629 token->key.value_off = add_string(rule_tmp->rules, value);
630 token->key.mode = mode;
631 break;
632 case TK_A_IGNORE_DEVICE:
633 case TK_A_STRING_ESCAPE_NONE:
634 case TK_A_STRING_ESCAPE_REPLACE:
635 case TK_A_IGNORE_REMOVE:
636 case TK_A_LAST_RULE:
637 break;
638 case TK_A_RUN:
639 token->key.value_off = add_string(rule_tmp->rules, value);
640 token->key.ignore_error = *(int *)data;
641 break;
642 case TK_A_NUM_FAKE_PART:
643 token->key.num_fake_part = *(int *)data;
644 break;
645 case TK_A_DEVLINK_PRIO:
646 token->key.devlink_prio = *(int *)data;
647 break;
648 case TK_A_OWNER_ID:
649 token->key.uid = *(uid_t *)data;
650 break;
651 case TK_A_GROUP_ID:
652 token->key.gid = *(gid_t *)data;
653 break;
654 case TK_A_MODE_ID:
655 token->key.mode = *(mode_t *)data;
656 break;
657 case TK_A_EVENT_TIMEOUT:
658 token->key.event_timeout = *(int *)data;
659 break;
660 case TK_RULE:
661 case TK_PARENTS_MAX:
662 case TK_END:
663 case TK_UNDEF:
664 err(rule_tmp->rules->udev, "wrong type %u\n", type);
665 return -1;
666 }
667 token->type = type;
668 token->key.op = op;
669 rule_tmp->token_cur++;
670 if (rule_tmp->token_cur >= ARRAY_SIZE(rule_tmp->token)) {
671 err(rule_tmp->rules->udev, "temporary rule array too small\n");
672 return -1;
673 }
674 return 0;
675 }
676
677 #ifdef DEBUG
678 static void dump_token(struct udev_rules *rules, struct token *token)
679 {
680 enum token_type type = token->type;
681 enum key_operation op = token->key.op;
682 const char *value = &rules->buf[token->key.value_off];
683 const char *attr = &rules->buf[token->key.attr_off];
684
685 switch (type) {
686 case TK_RULE:
687 {
688 const char *tks_ptr = (char *)rules->tokens;
689 const char *tk_ptr = (char *)token;
690 unsigned int off = tk_ptr - tks_ptr;
691
692 dbg(rules->udev, "* RULE '%s', off: %u(%u), next: %u, label: '%s'\n",
693 &rules->buf[token->rule.filename_off],
694 off / (unsigned int) sizeof(struct token), off,
695 token->rule.next_rule,
696 &rules->buf[token->rule.label_off]);
697 break;
698 }
699 case TK_M_WAITFOR:
700 case TK_M_ACTION:
701 case TK_M_DEVPATH:
702 case TK_M_KERNEL:
703 case TK_M_SUBSYSTEM:
704 case TK_M_DRIVER:
705 case TK_M_DEVLINK:
706 case TK_M_NAME:
707 case TK_M_KERNELS:
708 case TK_M_SUBSYSTEMS:
709 case TK_M_DRIVERS:
710 case TK_M_PROGRAM:
711 case TK_M_IMPORT_FILE:
712 case TK_M_IMPORT_PROG:
713 case TK_M_IMPORT_PARENT:
714 case TK_M_RESULT:
715 case TK_A_NAME:
716 case TK_A_DEVLINK:
717 case TK_A_OWNER:
718 case TK_A_GROUP:
719 case TK_A_MODE:
720 case TK_A_RUN:
721 dbg(rules->udev, "%s %s '%s'\n", token_str[type], operation_str[op], value);
722 break;
723 case TK_M_ATTR:
724 case TK_M_ATTRS:
725 case TK_M_ENV:
726 case TK_A_ATTR:
727 case TK_A_ENV:
728 dbg(rules->udev, "%s %s '%s' '%s'\n", token_str[type], operation_str[op], attr, value);
729 break;
730 case TK_A_IGNORE_DEVICE:
731 case TK_A_STRING_ESCAPE_NONE:
732 case TK_A_STRING_ESCAPE_REPLACE:
733 case TK_A_LAST_RULE:
734 case TK_A_IGNORE_REMOVE:
735 dbg(rules->udev, "%s\n", token_str[type]);
736 break;
737 case TK_M_TEST:
738 dbg(rules->udev, "%s %s '%s' %#o\n", token_str[type], operation_str[op], value, token->key.mode);
739 break;
740 case TK_A_NUM_FAKE_PART:
741 dbg(rules->udev, "%s %u\n", token_str[type], token->key.num_fake_part);
742 break;
743 case TK_A_DEVLINK_PRIO:
744 dbg(rules->udev, "%s %s %u\n", token_str[type], operation_str[op], token->key.devlink_prio);
745 break;
746 case TK_A_OWNER_ID:
747 dbg(rules->udev, "%s %s %u\n", token_str[type], operation_str[op], token->key.uid);
748 break;
749 case TK_A_GROUP_ID:
750 dbg(rules->udev, "%s %s %u\n", token_str[type], operation_str[op], token->key.gid);
751 break;
752 case TK_A_MODE_ID:
753 dbg(rules->udev, "%s %s %#o\n", token_str[type], operation_str[op], token->key.mode);
754 break;
755 case TK_A_EVENT_TIMEOUT:
756 dbg(rules->udev, "%s %s %u\n", token_str[type], operation_str[op], token->key.event_timeout);
757 break;
758 case TK_A_GOTO:
759 dbg(rules->udev, "%s '%s' %u\n", token_str[type], value, token->key.rule_goto);
760 break;
761 case TK_END:
762 dbg(rules->udev, "* %s\n", token_str[type]);
763 break;
764 case TK_PARENTS_MAX:
765 case TK_UNDEF:
766 dbg(rules->udev, "unknown type %u\n", type);
767 break;
768 }
769 }
770
771 static void dump_rules(struct udev_rules *rules)
772 {
773 unsigned int i;
774
775 dbg(rules->udev, "dumping %u (%zu bytes) tokens, %u (%zu bytes) strings\n",
776 rules->token_cur,
777 rules->token_cur * sizeof(struct token),
778 rules->buf_count,
779 rules->buf_cur);
780 for(i = 0; i < rules->token_cur; i++)
781 dump_token(rules, &rules->tokens[i]);
782 }
783 #else
784 static inline void dump_token(struct udev_rules *rules, struct token *token) {}
785 static inline void dump_rules(struct udev_rules *rules) {}
786 #endif /* DEBUG */
787
788 static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp)
789 {
790 unsigned int i;
791 unsigned int start = 0;
792 unsigned int end = rule_tmp->token_cur;
793
794 for (i = 0; i < rule_tmp->token_cur; i++) {
795 enum token_type next_val = TK_UNDEF;
796 unsigned int next_idx;
797 unsigned int j;
798
799 /* find smallest value */
800 for (j = start; j < end; j++) {
801 if (rule_tmp->token[j].type == TK_UNDEF)
802 continue;
803 if (next_val == TK_UNDEF || rule_tmp->token[j].type < next_val) {
804 next_val = rule_tmp->token[j].type;
805 next_idx = j;
806 }
807 }
808
809 /* add token and mark done */
810 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
811 return -1;
812 rule_tmp->token[next_idx].type = TK_UNDEF;
813
814 /* shrink range */
815 if (next_idx == start)
816 start++;
817 if (next_idx+1 == end)
818 end--;
819 }
820 return 0;
821 }
822
823 static int add_rule(struct udev_rules *rules, char *line,
824 const char *filename, unsigned int filename_off, unsigned int lineno)
825 {
826 int valid = 0;
827 char *linepos;
828 char *attr;
829 int physdev = 0;
830 struct rule_tmp rule_tmp;
831
832 memset(&rule_tmp, 0x00, sizeof(struct rule_tmp));
833 rule_tmp.rules = rules;
834 rule_tmp.rule.type = TK_RULE;
835 rule_tmp.rule.rule.filename_off = filename_off;
836
837 linepos = line;
838 while (1) {
839 char *key;
840 char *value;
841 enum key_operation op = KEY_OP_UNSET;
842
843 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0)
844 break;
845
846 if (strcasecmp(key, "ACTION") == 0) {
847 if (op != KEY_OP_MATCH && op != KEY_OP_NOMATCH) {
848 err(rules->udev, "invalid ACTION operation\n");
849 goto invalid;
850 }
851 rule_add_token(&rule_tmp, TK_M_ACTION, op, value, NULL);
852 valid = 1;
853 continue;
854 }
855
856 if (strcasecmp(key, "DEVPATH") == 0) {
857 if (op != KEY_OP_MATCH && op != KEY_OP_NOMATCH) {
858 err(rules->udev, "invalid DEVPATH operation\n");
859 goto invalid;
860 }
861 rule_add_token(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
862 valid = 1;
863 continue;
864 }
865
866 if (strcasecmp(key, "KERNEL") == 0) {
867 if (op != KEY_OP_MATCH && op != KEY_OP_NOMATCH) {
868 err(rules->udev, "invalid KERNEL operation\n");
869 goto invalid;
870 }
871 rule_add_token(&rule_tmp, TK_M_KERNEL, op, value, NULL);
872 valid = 1;
873 continue;
874 }
875
876 if (strcasecmp(key, "SUBSYSTEM") == 0) {
877 if (op != KEY_OP_MATCH && op != KEY_OP_NOMATCH) {
878 err(rules->udev, "invalid SUBSYSTEM operation\n");
879 goto invalid;
880 }
881 /* bus, class, subsystem events should all be the same */
882 if (strcmp(value, "subsystem") == 0 ||
883 strcmp(value, "bus") == 0 ||
884 strcmp(value, "class") == 0) {
885 if (strcmp(value, "bus") == 0 || strcmp(value, "class") == 0)
886 err(rules->udev, "'%s' must be specified as 'subsystem' \n"
887 "please fix it in %s:%u", value, filename, lineno);
888 rule_add_token(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
889 } else
890 rule_add_token(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
891 valid = 1;
892 continue;
893 }
894
895 if (strcasecmp(key, "DRIVER") == 0) {
896 if (op != KEY_OP_MATCH && op != KEY_OP_NOMATCH) {
897 err(rules->udev, "invalid DRIVER operation\n");
898 goto invalid;
899 }
900 rule_add_token(&rule_tmp, TK_M_DRIVER, op, value, NULL);
901 valid = 1;
902 continue;
903 }
904
905 if (strncasecmp(key, "ATTR{", sizeof("ATTR{")-1) == 0) {
906 attr = get_key_attribute(rules->udev, key + sizeof("ATTR")-1);
907 if (attr == NULL) {
908 err(rules->udev, "error parsing ATTR attribute\n");
909 goto invalid;
910 }
911 if (op == KEY_OP_MATCH || op == KEY_OP_NOMATCH) {
912 rule_add_token(&rule_tmp, TK_M_ATTR, op, value, attr);
913 } else {
914 rule_add_token(&rule_tmp, TK_A_ATTR, op, value, attr);
915 }
916 valid = 1;
917 continue;
918 }
919
920 if (strcasecmp(key, "KERNELS") == 0 ||
921 strcasecmp(key, "ID") == 0) {
922 if (op != KEY_OP_MATCH && op != KEY_OP_NOMATCH) {
923 err(rules->udev, "invalid KERNELS operation\n");
924 goto invalid;
925 }
926 rule_add_token(&rule_tmp, TK_M_KERNELS, op, value, NULL);
927 valid = 1;
928 continue;
929 }
930
931 if (strcasecmp(key, "SUBSYSTEMS") == 0 ||
932 strcasecmp(key, "BUS") == 0) {
933 if (op != KEY_OP_MATCH && op != KEY_OP_NOMATCH) {
934 err(rules->udev, "invalid SUBSYSTEMS operation\n");
935 goto invalid;
936 }
937 rule_add_token(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
938 valid = 1;
939 continue;
940 }
941
942 if (strcasecmp(key, "DRIVERS") == 0) {
943 if (op != KEY_OP_MATCH && op != KEY_OP_NOMATCH) {
944 err(rules->udev, "invalid DRIVERS operation\n");
945 goto invalid;
946 }
947 rule_add_token(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
948 valid = 1;
949 continue;
950 }
951
952 if (strncasecmp(key, "ATTRS{", sizeof("ATTRS{")-1) == 0 ||
953 strncasecmp(key, "SYSFS{", sizeof("SYSFS{")-1) == 0) {
954 if (op != KEY_OP_MATCH && op != KEY_OP_NOMATCH) {
955 err(rules->udev, "invalid ATTRS operation\n");
956 goto invalid;
957 }
958 attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
959 if (attr == NULL) {
960 err(rules->udev, "error parsing ATTRS attribute\n");
961 goto invalid;
962 }
963 if (strncmp(attr, "device/", 7) == 0)
964 err(rules->udev, "the 'device' link may not be available in a future kernel, "
965 "please fix it in %s:%u", filename, lineno);
966 else if (strstr(attr, "../") != NULL)
967 err(rules->udev, "do not reference parent sysfs directories directly, "
968 "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
969 rule_add_token(&rule_tmp, TK_M_ATTRS, op, value, attr);
970 valid = 1;
971 continue;
972 }
973
974 if (strncasecmp(key, "ENV{", sizeof("ENV{")-1) == 0) {
975 attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1);
976 if (attr == NULL) {
977 err(rules->udev, "error parsing ENV attribute\n");
978 goto invalid;
979 }
980 if (strncmp(attr, "PHYSDEV", 7) == 0)
981 physdev = 1;
982 if (op == KEY_OP_MATCH || op == KEY_OP_NOMATCH) {
983 if (rule_add_token(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
984 goto invalid;
985 } else {
986 if (rule_add_token(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
987 goto invalid;
988 }
989 valid = 1;
990 continue;
991 }
992
993 if (strcasecmp(key, "PROGRAM") == 0) {
994 rule_add_token(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
995 valid = 1;
996 continue;
997 }
998
999 if (strcasecmp(key, "RESULT") == 0) {
1000 if (op != KEY_OP_MATCH && op != KEY_OP_NOMATCH) {
1001 err(rules->udev, "invalid RESULT operation\n");
1002 goto invalid;
1003 }
1004 rule_add_token(&rule_tmp, TK_M_RESULT, op, value, NULL);
1005 valid = 1;
1006 continue;
1007 }
1008
1009 if (strncasecmp(key, "IMPORT", sizeof("IMPORT")-1) == 0) {
1010 attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1);
1011 if (attr != NULL && strstr(attr, "program")) {
1012 dbg(rules->udev, "IMPORT will be executed\n");
1013 rule_add_token(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1014 valid = 1;
1015 } else if (attr != NULL && strstr(attr, "file")) {
1016 dbg(rules->udev, "IMPORT will be included as file\n");
1017 rule_add_token(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1018 valid = 1;
1019 } else if (attr != NULL && strstr(attr, "parent")) {
1020 dbg(rules->udev, "IMPORT will include the parent values\n");
1021 rule_add_token(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
1022 valid = 1;
1023 } else {
1024 /* figure it out if it is executable */
1025 char file[UTIL_PATH_SIZE];
1026 char *pos;
1027 struct stat statbuf;
1028
1029 util_strlcpy(file, value, sizeof(file));
1030 pos = strchr(file, ' ');
1031 if (pos)
1032 pos[0] = '\0';
1033
1034 /* allow programs in /lib/udev called without the path */
1035 if (strchr(file, '/') == NULL) {
1036 util_strlcpy(file, UDEV_PREFIX "/lib/udev/", sizeof(file));
1037 util_strlcat(file, value, sizeof(file));
1038 pos = strchr(file, ' ');
1039 if (pos)
1040 pos[0] = '\0';
1041 }
1042
1043 dbg(rules->udev, "IMPORT auto mode for '%s'\n", file);
1044 if (!lstat(file, &statbuf) && (statbuf.st_mode & S_IXUSR)) {
1045 dbg(rules->udev, "IMPORT will be executed (autotype)\n");
1046 rule_add_token(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1047 valid = 1;
1048 } else {
1049 dbg(rules->udev, "IMPORT will be included as file (autotype)\n");
1050 rule_add_token(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1051 valid = 1;
1052 }
1053 }
1054 continue;
1055 }
1056
1057 if (strncasecmp(key, "TEST", sizeof("TEST")-1) == 0) {
1058 mode_t mode = 0;
1059
1060 if (op != KEY_OP_MATCH && op != KEY_OP_NOMATCH) {
1061 err(rules->udev, "invalid TEST operation\n");
1062 goto invalid;
1063 }
1064 attr = get_key_attribute(rules->udev, key + sizeof("TEST")-1);
1065 if (attr != NULL) {
1066 mode = strtol(attr, NULL, 8);
1067 rule_add_token(&rule_tmp, TK_M_TEST, op, value, &mode);
1068 } else {
1069 rule_add_token(&rule_tmp, TK_M_TEST, op, value, NULL);
1070 }
1071 valid = 1;
1072 continue;
1073 }
1074
1075 if (strncasecmp(key, "RUN", sizeof("RUN")-1) == 0) {
1076 int flag = 0;
1077
1078 attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1);
1079 if (attr != NULL && strstr(attr, "ignore_error"))
1080 flag = 1;
1081 rule_add_token(&rule_tmp, TK_A_RUN, op, value, &flag);
1082 valid = 1;
1083 continue;
1084 }
1085
1086 if (strcasecmp(key, "WAIT_FOR") == 0 || strcasecmp(key, "WAIT_FOR_SYSFS") == 0) {
1087 rule_add_token(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1088 valid = 1;
1089 continue;
1090 }
1091
1092 if (strcasecmp(key, "LABEL") == 0) {
1093 rule_tmp.rule.rule.label_off = add_string(rules, value);
1094 valid = 1;
1095 continue;
1096 }
1097
1098 if (strcasecmp(key, "GOTO") == 0) {
1099 rule_add_token(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1100 valid = 1;
1101 continue;
1102 }
1103
1104 if (strncasecmp(key, "NAME", sizeof("NAME")-1) == 0) {
1105 if (op == KEY_OP_MATCH || op == KEY_OP_NOMATCH) {
1106 rule_add_token(&rule_tmp, TK_M_NAME, op, value, NULL);
1107 } else {
1108 if (value[0] == '\0')
1109 dbg(rules->udev, "name empty, node creation suppressed\n");
1110 rule_add_token(&rule_tmp, TK_A_NAME, op, value, NULL);
1111 attr = get_key_attribute(rules->udev, key + sizeof("NAME")-1);
1112 if (attr != NULL) {
1113 if (strstr(attr, "all_partitions") != NULL) {
1114 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1115
1116 dbg(rules->udev, "creation of partition nodes requested\n");
1117 rule_add_token(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1118 }
1119 if (strstr(attr, "ignore_remove") != NULL) {
1120 dbg(rules->udev, "remove event should be ignored\n");
1121 rule_add_token(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1122 }
1123 }
1124 }
1125 continue;
1126 }
1127
1128 if (strcasecmp(key, "SYMLINK") == 0) {
1129 if (op == KEY_OP_MATCH || op == KEY_OP_NOMATCH)
1130 rule_add_token(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
1131 else
1132 rule_add_token(&rule_tmp, TK_A_DEVLINK, op, value, NULL);
1133 valid = 1;
1134 continue;
1135 }
1136
1137 if (strcasecmp(key, "OWNER") == 0) {
1138 uid_t uid;
1139 char *endptr;
1140
1141 uid = strtoul(value, &endptr, 10);
1142 if (endptr[0] == '\0') {
1143 rule_add_token(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1144 } else if (rules->resolve_names && strchr("$%", value[0]) == NULL) {
1145 uid = util_lookup_user(rules->udev, value);
1146 rule_add_token(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1147 } else {
1148 rule_add_token(&rule_tmp, TK_A_OWNER, op, value, NULL);
1149 }
1150 valid = 1;
1151 continue;
1152 }
1153
1154 if (strcasecmp(key, "GROUP") == 0) {
1155 gid_t gid;
1156 char *endptr;
1157
1158 gid = strtoul(value, &endptr, 10);
1159 if (endptr[0] == '\0') {
1160 rule_add_token(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1161 } else if (rules->resolve_names && strchr("$%", value[0]) == NULL) {
1162 gid = util_lookup_group(rules->udev, value);
1163 rule_add_token(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1164 } else {
1165 rule_add_token(&rule_tmp, TK_A_GROUP, op, value, NULL);
1166 }
1167 valid = 1;
1168 continue;
1169 }
1170
1171 if (strcasecmp(key, "MODE") == 0) {
1172 mode_t mode;
1173 char *endptr;
1174
1175 mode = strtol(value, &endptr, 8);
1176 if (endptr[0] == '\0')
1177 rule_add_token(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1178 else
1179 rule_add_token(&rule_tmp, TK_A_MODE, op, value, NULL);
1180 valid = 1;
1181 continue;
1182 }
1183
1184 if (strcasecmp(key, "OPTIONS") == 0) {
1185 const char *pos;
1186
1187 if (strstr(value, "last_rule") != NULL) {
1188 dbg(rules->udev, "last rule to be applied\n");
1189 rule_add_token(&rule_tmp, TK_A_LAST_RULE, 0, NULL, NULL);
1190 }
1191 if (strstr(value, "ignore_device") != NULL) {
1192 dbg(rules->udev, "device should be ignored\n");
1193 rule_add_token(&rule_tmp, TK_A_IGNORE_DEVICE, 0, NULL, NULL);
1194 }
1195 if (strstr(value, "ignore_remove") != NULL) {
1196 dbg(rules->udev, "remove event should be ignored\n");
1197 rule_add_token(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1198 }
1199 pos = strstr(value, "link_priority=");
1200 if (pos != NULL) {
1201 int prio = atoi(&pos[strlen("link_priority=")]);
1202
1203 rule_add_token(&rule_tmp, TK_A_DEVLINK_PRIO, 0, NULL, &prio);
1204 dbg(rules->udev, "link priority=%i\n", prio);
1205 }
1206 pos = strstr(value, "event_timeout=");
1207 if (pos != NULL) {
1208 int tout = atoi(&pos[strlen("event_timeout=")]);
1209
1210 rule_add_token(&rule_tmp, TK_A_EVENT_TIMEOUT, 0, NULL, &tout);
1211 dbg(rules->udev, "event timout=%i\n", tout);
1212 }
1213 pos = strstr(value, "string_escape=");
1214 if (pos != NULL) {
1215 pos = &pos[strlen("string_escape=")];
1216 if (strncmp(pos, "none", strlen("none")) == 0)
1217 rule_add_token(&rule_tmp, TK_A_STRING_ESCAPE_NONE, 0, NULL, NULL);
1218 else if (strncmp(pos, "replace", strlen("replace")) == 0)
1219 rule_add_token(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, 0, NULL, NULL);
1220 }
1221 if (strstr(value, "all_partitions") != NULL) {
1222 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1223
1224 rule_add_token(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1225 dbg(rules->udev, "creation of partition nodes requested\n");
1226 }
1227 valid = 1;
1228 continue;
1229 }
1230 err(rules->udev, "unknown key '%s' in %s:%u\n", key, filename, lineno);
1231 }
1232
1233 if (physdev)
1234 err(rules->udev, "PHYSDEV* values are deprecated and not available on recent kernels, \n"
1235 "please fix it in %s:%u", filename, lineno);
1236
1237 /* skip line if not any valid key was found */
1238 if (!valid)
1239 goto invalid;
1240
1241 /* add rule token */
1242 if (add_token(rules, &rule_tmp.rule) != 0)
1243 goto invalid;
1244
1245 /* add tokens to list, sorted by type */
1246 if (sort_token(rules, &rule_tmp) != 0)
1247 goto invalid;
1248 return 0;
1249 invalid:
1250 err(rules->udev, "invalid rule '%s:%u'\n", filename, lineno);
1251 return -1;
1252 }
1253
1254 static int parse_file(struct udev_rules *rules, const char *filename)
1255 {
1256 FILE *f;
1257 unsigned int filename_off;
1258 unsigned int first_token;
1259 char line[UTIL_LINE_SIZE];
1260 int line_nr = 0;
1261 unsigned int i;
1262
1263 info(rules->udev, "reading '%s' as rules file\n", filename);
1264
1265 f = fopen(filename, "r");
1266 if (f == NULL)
1267 return -1;
1268
1269 filename_off = add_string(rules, filename);
1270 first_token = rules->token_cur;
1271
1272 while(fgets(line, sizeof(line), f) != NULL) {
1273 char *key;
1274 size_t len;
1275
1276 /* skip whitespace */
1277 line_nr++;
1278 key = line;
1279 while (isspace(key[0]))
1280 key++;
1281
1282 /* comment */
1283 if (key[0] == '#')
1284 continue;
1285
1286 len = strlen(line);
1287 if (len < 3)
1288 continue;
1289
1290 /* continue reading if backslash+newline is found */
1291 while (line[len-2] == '\\') {
1292 if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1293 break;
1294 line_nr++;
1295 len = strlen(line);
1296 }
1297
1298 if (len+1 >= sizeof(line)) {
1299 err(rules->udev, "line too long '%s':%u, ignored\n", filename, line_nr);
1300 continue;
1301 }
1302 add_rule(rules, key, filename, filename_off, line_nr);
1303 }
1304 fclose(f);
1305
1306 /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1307 for (i = first_token+1; i < rules->token_cur; i++) {
1308 if (rules->tokens[i].type == TK_A_GOTO) {
1309 char *label = &rules->buf[rules->tokens[i].key.value_off];
1310 unsigned int j;
1311
1312 for (j = i+1; j < rules->token_cur; j++) {
1313 if (rules->tokens[j].type != TK_RULE)
1314 continue;
1315 if (rules->tokens[j].rule.label_off == 0)
1316 continue;
1317 if (strcmp(label, &rules->buf[rules->tokens[j].rule.label_off]) != 0)
1318 continue;
1319 rules->tokens[i].key.rule_goto = j;
1320 }
1321 if (rules->tokens[i].key.rule_goto == 0)
1322 err(rules->udev, "GOTO '%s' has no matching label in: '%s'\n", label, filename);
1323 }
1324 }
1325 return 0;
1326 }
1327
1328 static int add_matching_files(struct udev *udev, struct udev_list_node *file_list, const char *dirname, const char *suffix)
1329 {
1330 struct dirent *ent;
1331 DIR *dir;
1332 char filename[UTIL_PATH_SIZE];
1333
1334 dbg(udev, "open directory '%s'\n", dirname);
1335 dir = opendir(dirname);
1336 if (dir == NULL) {
1337 err(udev, "unable to open '%s': %m\n", dirname);
1338 return -1;
1339 }
1340
1341 while (1) {
1342 ent = readdir(dir);
1343 if (ent == NULL || ent->d_name[0] == '\0')
1344 break;
1345
1346 if ((ent->d_name[0] == '.') || (ent->d_name[0] == '#'))
1347 continue;
1348
1349 /* look for file matching with specified suffix */
1350 if (suffix != NULL) {
1351 const char *ext;
1352
1353 ext = strrchr(ent->d_name, '.');
1354 if (ext == NULL)
1355 continue;
1356 if (strcmp(ext, suffix) != 0)
1357 continue;
1358 }
1359 dbg(udev, "put file '%s/%s' into list\n", dirname, ent->d_name);
1360
1361 snprintf(filename, sizeof(filename), "%s/%s", dirname, ent->d_name);
1362 filename[sizeof(filename)-1] = '\0';
1363 udev_list_entry_add(udev, file_list, filename, NULL, 1, 1);
1364 }
1365
1366 closedir(dir);
1367 return 0;
1368 }
1369
1370 struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
1371 {
1372 struct udev_rules *rules;
1373 struct stat statbuf;
1374 char filename[PATH_MAX];
1375 struct udev_list_node file_list;
1376 struct udev_list_entry *file_loop, *file_tmp;
1377 unsigned int prev_rule;
1378 struct token end_token;
1379 unsigned int i;
1380
1381 rules = malloc(sizeof(struct udev_rules));
1382 if (rules == NULL)
1383 return NULL;
1384 memset(rules, 0x00, sizeof(struct udev_rules));
1385 rules->udev = udev;
1386 rules->resolve_names = resolve_names;
1387 udev_list_init(&file_list);
1388
1389 /* init token array and string buffer */
1390 rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
1391 if (rules->tokens != NULL)
1392 rules->token_max = PREALLOC_TOKEN;
1393 rules->buf = malloc(PREALLOC_STRBUF);
1394 if (rules->buf != NULL)
1395 rules->buf_max = PREALLOC_STRBUF;
1396 info(udev, "prealloc %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1397 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1398 /* offset 0 in the string buffer is always empty */
1399 add_string(rules, "");
1400
1401 if (udev_get_rules_path(udev) != NULL) {
1402 /* custom rules location for testing */
1403 add_matching_files(udev, &file_list, udev_get_rules_path(udev), ".rules");
1404 } else {
1405 struct udev_list_node sort_list;
1406 struct udev_list_entry *sort_loop, *sort_tmp;
1407
1408 /* read user/custom rules */
1409 add_matching_files(udev, &file_list, SYSCONFDIR "/udev/rules.d", ".rules");
1410
1411 /* read dynamic/temporary rules */
1412 util_strlcpy(filename, udev_get_dev_path(udev), sizeof(filename));
1413 util_strlcat(filename, "/.udev/rules.d", sizeof(filename));
1414 if (stat(filename, &statbuf) != 0) {
1415 util_create_path(udev, filename);
1416 udev_selinux_setfscreatecon(udev, filename, S_IFDIR|0755);
1417 mkdir(filename, 0755);
1418 udev_selinux_resetfscreatecon(udev);
1419 }
1420 udev_list_init(&sort_list);
1421 add_matching_files(udev, &sort_list, filename, ".rules");
1422
1423 /* read default rules */
1424 add_matching_files(udev, &sort_list, UDEV_PREFIX "/lib/udev/rules.d", ".rules");
1425
1426 /* sort all rules files by basename into list of files */
1427 udev_list_entry_foreach_safe(sort_loop, sort_tmp, udev_list_get_entry(&sort_list)) {
1428 const char *sort_name = udev_list_entry_get_name(sort_loop);
1429 const char *sort_base = strrchr(sort_name, '/');
1430
1431 if (sort_base == NULL)
1432 continue;
1433
1434 udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1435 const char *file_name = udev_list_entry_get_name(file_loop);
1436 const char *file_base = strrchr(file_name, '/');
1437
1438 if (file_base == NULL)
1439 continue;
1440 if (strcmp(file_base, sort_base) == 0) {
1441 info(udev, "rule file basename '%s' already added, ignoring '%s'\n",
1442 file_name, sort_name);
1443 udev_list_entry_remove(sort_loop);
1444 sort_loop = NULL;
1445 break;
1446 }
1447 if (strcmp(file_base, sort_base) > 0)
1448 break;
1449 }
1450 if (sort_loop != NULL)
1451 udev_list_entry_move_before(sort_loop, file_loop);
1452 }
1453 }
1454
1455 /* parse list of files */
1456 udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1457 const char *file_name = udev_list_entry_get_name(file_loop);
1458
1459 if (stat(file_name, &statbuf) == 0 && statbuf.st_size > 0)
1460 parse_file(rules, file_name);
1461 else
1462 info(udev, "can not read '%s'\n", file_name);
1463 udev_list_entry_remove(file_loop);
1464 }
1465
1466 memset(&end_token, 0x00, sizeof(struct token));
1467 end_token.type = TK_END;
1468 add_token(rules, &end_token);
1469
1470 /* shrink allocate buffers */
1471 if (rules->token_cur < rules->token_max) {
1472 struct token *tokens;
1473
1474 tokens = realloc(rules->tokens, rules->token_cur * sizeof(struct token));
1475 if (tokens != NULL || rules->token_cur == 0) {
1476 rules->tokens = tokens;
1477 rules->token_max = rules->token_cur;
1478 }
1479 }
1480 if (rules->buf_cur < rules->buf_max) {
1481 char *buf;
1482
1483 buf = realloc(rules->buf, rules->buf_cur);
1484 if (buf != NULL || rules->buf_cur == 0) {
1485 rules->buf = buf;
1486 rules->buf_max = rules->buf_cur;
1487 }
1488 }
1489 info(udev, "shrunk to %lu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1490 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1491
1492 /* link all TK_RULE tokens to be able to fast-forward to next TK_RULE */
1493 prev_rule = 0;
1494 for (i = 1; i < rules->token_cur; i++) {
1495 if (rules->tokens[i].type == TK_RULE) {
1496 rules->tokens[prev_rule].rule.next_rule = i;
1497 prev_rule = i;
1498 }
1499 }
1500 dump_rules(rules);
1501 return rules;
1502 }
1503
1504 void udev_rules_unref(struct udev_rules *rules)
1505 {
1506 if (rules == NULL)
1507 return;
1508 free(rules->tokens);
1509 free(rules->buf);
1510 free(rules);
1511 }
1512
1513 static int match_key(struct udev_rules *rules, struct token *token, const char *val)
1514 {
1515 const char *key_name = token_str[token->type];
1516 char *key_value = &rules->buf[token->key.value_off];
1517 char *pos;
1518 int match = 0;
1519
1520 if (val == NULL)
1521 val = "";
1522
1523 /* look for a matching string, parts are separated by '|' */
1524 if (strchr(key_value, '|') != NULL) {
1525 char value[UTIL_PATH_SIZE];
1526
1527 util_strlcpy(value, &rules->buf[token->key.value_off], sizeof(value));
1528 key_value = value;
1529 while (key_value != NULL) {
1530 pos = strchr(key_value, '|');
1531 if (pos != NULL) {
1532 pos[0] = '\0';
1533 pos = &pos[1];
1534 }
1535 dbg(rules->udev, "match %s '%s' <-> '%s'\n", key_name, key_value, val);
1536 match = (fnmatch(key_value, val, 0) == 0);
1537 if (match)
1538 break;
1539 key_value = pos;
1540 }
1541 } else {
1542 match = (fnmatch(key_value, val, 0) == 0);
1543 }
1544
1545 if (match && (token->key.op == KEY_OP_MATCH)) {
1546 dbg(rules->udev, "%s is true (matching value)\n", key_name);
1547 return 0;
1548 }
1549 if (!match && (token->key.op == KEY_OP_NOMATCH)) {
1550 dbg(rules->udev, "%s is true (non-matching value)\n", key_name);
1551 return 0;
1552 }
1553 dbg(rules->udev, "%s is not true\n", key_name);
1554 return -1;
1555 }
1556
1557 static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur)
1558 {
1559 char attr[UTIL_PATH_SIZE];
1560 const char *key_name = &rules->buf[cur->key.attr_off];
1561 const char *key_value = &rules->buf[cur->key.value_off];
1562 char value[UTIL_NAME_SIZE] = "";
1563 size_t len;
1564
1565 util_strlcpy(attr, key_name, sizeof(attr));
1566 util_resolve_subsys_kernel(event->udev, attr, value, sizeof(value), 1);
1567 if (value[0] == '\0') {
1568 const char *val;
1569
1570 val = udev_device_get_sysattr_value(dev, key_name);
1571 if (val != NULL)
1572 util_strlcpy(value, val, sizeof(value));
1573 }
1574 if (value[0]=='\0')
1575 return -1;
1576
1577 /* strip trailing whitespace of value, if not asked to match for it */
1578 len = strlen(key_value);
1579 if (len > 0 && !isspace(key_value[len-1])) {
1580 len = strlen(value);
1581 while (len > 0 && isspace(value[--len]))
1582 value[len] = '\0';
1583 dbg(rules->udev, "removed trailing whitespace from '%s'\n", value);
1584 }
1585 return match_key(rules, cur, value);
1586 }
1587
1588 enum escape_type {
1589 ESCAPE_UNSET,
1590 ESCAPE_NONE,
1591 ESCAPE_REPLACE,
1592 };
1593
1594 int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event)
1595 {
1596 struct token *rule;
1597 struct token *cur;
1598
1599 if (rules->tokens == NULL)
1600 return -1;
1601
1602 /* loop through token list, match, run actions or forward to next rule */
1603 cur = &rules->tokens[0];
1604 while (cur != NULL && cur->type != TK_END) {
1605 enum escape_type esc = ESCAPE_UNSET;
1606 unsigned int idx;
1607
1608 dump_token(rules, cur);
1609 switch (cur->type) {
1610 case TK_RULE:
1611 /* current rule */
1612 rule = cur;
1613 esc = ESCAPE_UNSET;
1614 break;
1615 case TK_M_WAITFOR:
1616 {
1617 char filename[UTIL_PATH_SIZE];
1618 int found;
1619
1620 util_strlcpy(filename, &rules->buf[cur->key.value_off], sizeof(filename));
1621 udev_event_apply_format(event, filename, sizeof(filename));
1622 found = (wait_for_file(event->dev, filename, 10) == 0);
1623 if (!found && (cur->key.op != KEY_OP_NOMATCH))
1624 goto nomatch;
1625 break;
1626 }
1627 case TK_M_ACTION:
1628 if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
1629 goto nomatch;
1630 break;
1631 case TK_M_DEVPATH:
1632 if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
1633 goto nomatch;
1634 break;
1635 case TK_M_KERNEL:
1636 if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
1637 goto nomatch;
1638 break;
1639 case TK_M_DEVLINK:
1640 {
1641 size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
1642 struct udev_list_entry *list_entry;
1643 int match = 0;
1644
1645 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
1646 const char *devlink;
1647
1648 devlink = &udev_list_entry_get_name(list_entry)[devlen];
1649 if (match_key(rules, cur, devlink) == 0) {
1650 match = 1;
1651 break;
1652 }
1653 }
1654 if (!match)
1655 goto nomatch;
1656 break;
1657 }
1658 case TK_M_NAME:
1659 if (match_key(rules, cur, event->name) != 0)
1660 goto nomatch;
1661 break;
1662 case TK_M_ENV:
1663 {
1664 struct udev_list_entry *list_entry;
1665 const char *key_name = &rules->buf[cur->key.attr_off];
1666 const char *value;
1667
1668 list_entry = udev_device_get_properties_list_entry(event->dev);
1669 list_entry = udev_list_entry_get_by_name(list_entry, key_name);
1670 value = udev_list_entry_get_value(list_entry);
1671 if (value == NULL) {
1672 dbg(event->udev, "ENV{%s} is not set, treat as empty\n", key_name);
1673 value = "";
1674 }
1675 if (match_key(rules, cur, value))
1676 goto nomatch;
1677 break;
1678 }
1679 case TK_M_SUBSYSTEM:
1680 if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
1681 goto nomatch;
1682 break;
1683 case TK_M_DRIVER:
1684 if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
1685 goto nomatch;
1686 break;
1687 case TK_M_ATTR:
1688 if (match_attr(rules, event->dev, event, cur) != 0)
1689 goto nomatch;
1690 break;
1691 case TK_M_KERNELS:
1692 case TK_M_SUBSYSTEMS:
1693 case TK_M_DRIVERS:
1694 case TK_M_ATTRS:
1695 {
1696 struct token *next;
1697
1698 /* get whole sequence of parent matches */
1699 next = cur;
1700 while (next->type < TK_PARENTS_MAX)
1701 next++;
1702
1703 /* loop over parents */
1704 event->dev_parent = event->dev;
1705 while (1) {
1706 struct token *key;
1707
1708 dbg(event->udev, "parent: '%s'\n", udev_device_get_syspath(event->dev_parent));
1709 /* loop over sequence of parent match keys */
1710 for (key = cur; key < next; key++ ) {
1711 dump_token(rules, key);
1712 switch(key->type) {
1713 case TK_M_KERNELS:
1714 if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
1715 goto try_parent;
1716 break;
1717 case TK_M_SUBSYSTEMS:
1718 if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
1719 goto try_parent;
1720 break;
1721 case TK_M_DRIVERS:
1722 if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
1723 goto try_parent;
1724 break;
1725 case TK_M_ATTRS:
1726 if (match_attr(rules, event->dev_parent, event, key) != 0)
1727 goto try_parent;
1728 break;
1729 default:
1730 goto nomatch;
1731 }
1732 dbg(event->udev, "parent key matched\n");
1733 }
1734 dbg(event->udev, "all parent keys matched\n");
1735 /* all keys matched */
1736 break;
1737
1738 try_parent:
1739 event->dev_parent = udev_device_get_parent(event->dev_parent);
1740 if (event->dev_parent == NULL)
1741 goto nomatch;
1742 }
1743 /* move behind our sequence of parent match keys */
1744 cur = next;
1745 continue;
1746 }
1747 case TK_M_TEST:
1748 {
1749 char filename[UTIL_PATH_SIZE];
1750 struct stat statbuf;
1751 int match;
1752
1753 util_strlcpy(filename, &rules->buf[cur->key.value_off], sizeof(filename));
1754 udev_event_apply_format(event, filename, sizeof(filename));
1755 if (util_resolve_subsys_kernel(event->udev, NULL, filename, sizeof(filename), 0) != 0)
1756 if (filename[0] != '/') {
1757 char tmp[UTIL_PATH_SIZE];
1758
1759 util_strlcpy(tmp, udev_device_get_syspath(event->dev), sizeof(tmp));
1760 util_strlcat(tmp, "/", sizeof(tmp));
1761 util_strlcat(tmp, filename, sizeof(tmp));
1762 util_strlcpy(filename, tmp, sizeof(filename));
1763 }
1764
1765 attr_subst_subdir(filename, sizeof(filename));
1766
1767 match = (stat(filename, &statbuf) == 0);
1768 info(event->udev, "'%s' %s", filename, match ? "exists\n" : "does not exist\n");
1769 if (match && cur->key.mode > 0) {
1770 match = ((statbuf.st_mode & cur->key.mode) > 0);
1771 info(event->udev, "'%s' has mode=%#o and %s %#o\n", filename, statbuf.st_mode,
1772 match ? "matches" : "does not match", cur->key.mode);
1773 }
1774 if (match && cur->key.op == KEY_OP_NOMATCH)
1775 goto nomatch;
1776 if (!match && cur->key.op == KEY_OP_MATCH)
1777 goto nomatch;
1778 break;
1779 }
1780 case TK_M_PROGRAM:
1781 {
1782 char program[UTIL_PATH_SIZE];
1783 char **envp;
1784 char result[UTIL_PATH_SIZE];
1785
1786 free(event->program_result);
1787 event->program_result = NULL;
1788 util_strlcpy(program, &rules->buf[cur->key.value_off], sizeof(program));
1789 udev_event_apply_format(event, program, sizeof(program));
1790 envp = udev_device_get_properties_envp(event->dev);
1791 if (util_run_program(event->udev, program, envp, result, sizeof(result), NULL) != 0) {
1792 if (cur->key.op != KEY_OP_NOMATCH)
1793 goto nomatch;
1794 } else {
1795 int count;
1796
1797 util_remove_trailing_chars(result, '\n');
1798 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
1799 count = util_replace_chars(result, ALLOWED_CHARS_INPUT);
1800 if (count > 0)
1801 info(event->udev, "%i character(s) replaced\n" , count);
1802 }
1803 event->program_result = strdup(result);
1804 dbg(event->udev, "storing result '%s'\n", event->program_result);
1805 if (cur->key.op == KEY_OP_NOMATCH)
1806 goto nomatch;
1807 }
1808 break;
1809 }
1810 case TK_M_IMPORT_FILE:
1811 {
1812 char import[UTIL_PATH_SIZE];
1813
1814 util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));
1815 udev_event_apply_format(event, import, sizeof(import));
1816 if (import_file_into_properties(event->dev, import) != 0)
1817 if (cur->key.op != KEY_OP_NOMATCH)
1818 goto nomatch;
1819 break;
1820 }
1821 case TK_M_IMPORT_PROG:
1822 {
1823 char import[UTIL_PATH_SIZE];
1824
1825 util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));
1826 udev_event_apply_format(event, import, sizeof(import));
1827 if (import_program_into_properties(event->dev, import) != 0)
1828 if (cur->key.op != KEY_OP_NOMATCH)
1829 goto nomatch;
1830 break;
1831 }
1832 case TK_M_IMPORT_PARENT:
1833 {
1834 char import[UTIL_PATH_SIZE];
1835
1836 util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));
1837 udev_event_apply_format(event, import, sizeof(import));
1838 if (import_parent_into_properties(event->dev, import) != 0)
1839 if (cur->key.op != KEY_OP_NOMATCH)
1840 goto nomatch;
1841 break;
1842 }
1843 case TK_M_RESULT:
1844 if (match_key(rules, cur, event->program_result) != 0)
1845 goto nomatch;
1846 break;
1847
1848 case TK_A_IGNORE_DEVICE:
1849 event->ignore_device = 1;
1850 return 0;
1851 break;
1852 case TK_A_STRING_ESCAPE_NONE:
1853 esc = ESCAPE_NONE;
1854 break;
1855 case TK_A_STRING_ESCAPE_REPLACE:
1856 esc = ESCAPE_REPLACE;
1857 break;
1858 case TK_A_NUM_FAKE_PART:
1859 if (strcmp(udev_device_get_subsystem(event->dev), "block") != 0)
1860 break;
1861 if (udev_device_get_sysnum(event->dev) != NULL)
1862 break;
1863 udev_device_set_num_fake_partitions(event->dev, cur->key.num_fake_part);
1864 break;
1865 case TK_A_DEVLINK_PRIO:
1866 udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
1867 break;
1868 case TK_A_OWNER:
1869 {
1870 char owner[UTIL_NAME_SIZE];
1871
1872 if (event->owner_final)
1873 break;
1874 if (cur->key.op == KEY_OP_ASSIGN_FINAL)
1875 event->owner_final = 1;
1876 util_strlcpy(owner, &rules->buf[cur->key.value_off], sizeof(owner));
1877 udev_event_apply_format(event, owner, sizeof(owner));
1878 event->uid = util_lookup_user(event->udev, owner);
1879 break;
1880 }
1881 case TK_A_GROUP:
1882 {
1883 char group[UTIL_NAME_SIZE];
1884
1885 if (event->group_final)
1886 break;
1887 if (cur->key.op == KEY_OP_ASSIGN_FINAL)
1888 event->group_final = 1;
1889 util_strlcpy(group, &rules->buf[cur->key.value_off], sizeof(group));
1890 udev_event_apply_format(event, group, sizeof(group));
1891 event->gid = util_lookup_group(event->udev, group);
1892 break;
1893 }
1894 case TK_A_MODE:
1895 {
1896 char mode[UTIL_NAME_SIZE];
1897 char *endptr;
1898
1899 if (event->mode_final)
1900 break;
1901 if (cur->key.op == KEY_OP_ASSIGN_FINAL)
1902 event->mode_final = 1;
1903 util_strlcpy(mode, &rules->buf[cur->key.value_off], sizeof(mode));
1904 udev_event_apply_format(event, mode, sizeof(mode));
1905 event->mode = strtol(mode, &endptr, 8);
1906 if (endptr[0] != '\0') {
1907 err(event->udev, "invalide mode '%s' set default mode 0660\n", mode);
1908 event->mode = 0660;
1909 }
1910 break;
1911 }
1912 case TK_A_OWNER_ID:
1913 if (event->owner_final)
1914 break;
1915 if (cur->key.op == KEY_OP_ASSIGN_FINAL)
1916 event->owner_final = 1;
1917 event->uid = cur->key.uid;
1918 break;
1919 case TK_A_GROUP_ID:
1920 if (event->group_final)
1921 break;
1922 if (cur->key.op == KEY_OP_ASSIGN_FINAL)
1923 event->group_final = 1;
1924 event->gid = cur->key.gid;
1925 break;
1926 case TK_A_MODE_ID:
1927 if (event->mode_final)
1928 break;
1929 if (cur->key.op == KEY_OP_ASSIGN_FINAL)
1930 event->mode_final = 1;
1931 event->mode = cur->key.mode;
1932 break;
1933 case TK_A_ENV:
1934 {
1935 const char *name = &rules->buf[cur->key.attr_off];
1936 char *value = &rules->buf[cur->key.value_off];
1937
1938 if (value[0] != '\0') {
1939 char temp_value[UTIL_NAME_SIZE];
1940 struct udev_list_entry *entry;
1941
1942 util_strlcpy(temp_value, value, sizeof(temp_value));
1943 udev_event_apply_format(event, temp_value, sizeof(temp_value));
1944 entry = udev_device_add_property(event->dev, name, temp_value);
1945 /* store in db */
1946 udev_list_entry_set_flag(entry, 1);
1947 } else {
1948 udev_device_add_property(event->dev, name, NULL);
1949 }
1950 break;
1951 }
1952 case TK_A_NAME:
1953 {
1954 const char *name = &rules->buf[cur->key.value_off];
1955 char name_str[UTIL_PATH_SIZE];
1956 int count;
1957
1958 if (event->name_final)
1959 break;
1960 if (cur->key.op == KEY_OP_ASSIGN_FINAL)
1961 event->name_final = 1;
1962 if (name[0] == '\0') {
1963 free(event->name);
1964 event->name = NULL;
1965 break;
1966 }
1967 util_strlcpy(name_str, name, sizeof(name_str));
1968 udev_event_apply_format(event, name_str, sizeof(name_str));
1969 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
1970 count = util_replace_chars(name_str, ALLOWED_CHARS_FILE);
1971 if (count > 0)
1972 info(event->udev, "%i character(s) replaced\n", count);
1973 event->name = strdup(name_str);
1974 }
1975 break;
1976 }
1977 case TK_A_DEVLINK:
1978 {
1979 char temp[UTIL_PATH_SIZE];
1980 char filename[UTIL_PATH_SIZE];
1981 char *pos, *next;
1982 int count = 0;
1983
1984 if (event->devlink_final)
1985 break;
1986 if (cur->key.op == KEY_OP_ASSIGN_FINAL)
1987 event->devlink_final = 1;
1988 if (cur->key.op == KEY_OP_ASSIGN || cur->key.op == KEY_OP_ASSIGN_FINAL)
1989 udev_device_cleanup_devlinks_list(event->dev);
1990
1991 /* allow multiple symlinks separated by spaces */
1992 util_strlcpy(temp, &rules->buf[cur->key.value_off], sizeof(temp));
1993 udev_event_apply_format(event, temp, sizeof(temp));
1994 if (esc == ESCAPE_UNSET)
1995 count = util_replace_chars(temp, ALLOWED_CHARS_FILE " ");
1996 else if (esc == ESCAPE_REPLACE)
1997 count = util_replace_chars(temp, ALLOWED_CHARS_FILE);
1998 if (count > 0)
1999 info(event->udev, "%i character(s) replaced\n" , count);
2000 dbg(event->udev, "rule applied, added symlink(s) '%s'\n", temp);
2001 pos = temp;
2002 while (isspace(pos[0]))
2003 pos++;
2004 next = strchr(pos, ' ');
2005 while (next) {
2006 next[0] = '\0';
2007 info(event->udev, "add symlink '%s'\n", pos);
2008 util_strlcpy(filename, udev_get_dev_path(event->udev), sizeof(filename));
2009 util_strlcat(filename, "/", sizeof(filename));
2010 util_strlcat(filename, pos, sizeof(filename));
2011 udev_device_add_devlink(event->dev, filename);
2012 while (isspace(next[1]))
2013 next++;
2014 pos = &next[1];
2015 next = strchr(pos, ' ');
2016 }
2017 if (pos[0] != '\0') {
2018 info(event->udev, "add symlink '%s'\n", pos);
2019 util_strlcpy(filename, udev_get_dev_path(event->udev), sizeof(filename));
2020 util_strlcat(filename, "/", sizeof(filename));
2021 util_strlcat(filename, pos, sizeof(filename));
2022 udev_device_add_devlink(event->dev, filename);
2023 }
2024 }
2025 break;
2026 case TK_A_EVENT_TIMEOUT:
2027 udev_device_set_event_timeout(event->dev, cur->key.event_timeout);
2028 break;
2029 case TK_A_IGNORE_REMOVE:
2030 udev_device_set_ignore_remove(event->dev, 1);
2031 break;
2032 case TK_A_ATTR:
2033 {
2034 const char *key_name = &rules->buf[cur->key.attr_off];
2035 char attr[UTIL_PATH_SIZE];
2036 char value[UTIL_NAME_SIZE];
2037 FILE *f;
2038
2039 util_strlcpy(attr, key_name, sizeof(attr));
2040 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0) {
2041 util_strlcpy(attr, udev_device_get_syspath(event->dev), sizeof(attr));
2042 util_strlcat(attr, "/", sizeof(attr));
2043 util_strlcat(attr, key_name, sizeof(attr));
2044 }
2045
2046 attr_subst_subdir(attr, sizeof(attr));
2047
2048 util_strlcpy(value, &rules->buf[cur->key.value_off], sizeof(value));
2049 udev_event_apply_format(event, value, sizeof(value));
2050 info(event->udev, "writing '%s' to sysfs file '%s'\n", value, attr);
2051 f = fopen(attr, "w");
2052 if (f != NULL) {
2053 if (!event->test)
2054 if (fprintf(f, "%s", value) <= 0)
2055 err(event->udev, "error writing ATTR{%s}: %m\n", attr);
2056 fclose(f);
2057 } else {
2058 err(event->udev, "error opening ATTR{%s} for writing: %m\n", attr);
2059 }
2060 break;
2061 }
2062 case TK_A_RUN:
2063 {
2064 struct udev_list_entry *list_entry;
2065
2066 if (cur->key.op == KEY_OP_ASSIGN || cur->key.op == KEY_OP_ASSIGN_FINAL)
2067 udev_list_cleanup_entries(event->udev, &event->run_list);
2068 list_entry = udev_list_entry_add(event->udev, &event->run_list,
2069 &rules->buf[cur->key.value_off], NULL, 1, 0);
2070 if (cur->key.ignore_error)
2071 udev_list_entry_set_flag(list_entry, 1);
2072 break;
2073 }
2074 case TK_A_GOTO:
2075 cur = &rules->tokens[cur->key.rule_goto];
2076 continue;
2077 case TK_A_LAST_RULE:
2078 break;
2079
2080 case TK_PARENTS_MAX:
2081 case TK_END:
2082 case TK_UNDEF:
2083 err(rules->udev, "wrong type %u\n", cur->type);
2084 goto nomatch;
2085 }
2086
2087 cur++;
2088 continue;
2089 nomatch:
2090 /* fast-forward to next rule */
2091 idx = rule->rule.next_rule;
2092 if (idx == 0)
2093 break;
2094 dbg(rules->udev, "forward to rule: %u\n", idx);
2095 cur = &rules->tokens[idx];
2096 }
2097 return 0;
2098 }
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