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udevd: simplify rules execution loop
[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 /* KEY=="", KEY!="", KEY+="", KEY="", KEY:="" */
35 enum operation_type {
36 OP_UNSET,
37
38 OP_MATCH,
39 OP_NOMATCH,
40 OP_MATCH_MAX,
41
42 OP_ADD,
43 OP_ASSIGN,
44 OP_ASSIGN_FINAL,
45 };
46
47 static const char *operation_str[] = {
48 [OP_UNSET] = "UNSET",
49 [OP_MATCH] = "match",
50 [OP_NOMATCH] = "nomatch",
51 [OP_MATCH_MAX] = "MATCH_MAX",
52
53 [OP_ADD] = "add",
54 [OP_ASSIGN] = "assign",
55 [OP_ASSIGN_FINAL] = "assign-final",
56 };
57
58 enum string_glob_type {
59 GL_UNSET,
60 GL_PLAIN, /* no special chars */
61 GL_GLOB, /* shell globs ?,*,[] */
62 GL_SPLIT, /* multi-value A|B */
63 GL_SPLIT_GLOB, /* multi-value with glob A*|B* */
64 GL_SOMETHING, /* commonly used "?*" */
65 GL_FORMAT,
66 };
67
68 #ifdef DEBUG
69 static const char *string_glob_str[] = {
70 [GL_UNSET] = "UNSET",
71 [GL_PLAIN] = "plain",
72 [GL_GLOB] = "glob",
73 [GL_SPLIT] = "split",
74 [GL_SPLIT_GLOB] = "split-glob",
75 [GL_SOMETHING] = "split-glob",
76 [GL_FORMAT] = "format",
77 };
78 #endif
79
80 /* tokens of a rule are sorted/handled in this order */
81 enum token_type {
82 TK_UNSET,
83 TK_RULE,
84
85 TK_M_ACTION, /* val */
86 TK_M_DEVPATH, /* val */
87 TK_M_KERNEL, /* val */
88 TK_M_DEVLINK, /* val */
89 TK_M_NAME, /* val */
90 TK_M_ENV, /* val, attr */
91 TK_M_SUBSYSTEM, /* val */
92 TK_M_DRIVER, /* val */
93 TK_M_WAITFOR, /* val */
94 TK_M_ATTR, /* val, attr */
95
96 TK_M_KERNELS, /* val */
97 TK_M_SUBSYSTEMS, /* val */
98 TK_M_DRIVERS, /* val */
99 TK_M_ATTRS, /* val, attr */
100 TK_M_PARENTS_MAX,
101
102 TK_M_TEST, /* val, mode_t */
103 TK_M_PROGRAM, /* val */
104 TK_M_IMPORT_FILE, /* val */
105 TK_M_IMPORT_PROG, /* val */
106 TK_M_IMPORT_PARENT, /* val */
107 TK_M_RESULT, /* val */
108 TK_M_MAX,
109
110 TK_A_IGNORE_DEVICE,
111 TK_A_STRING_ESCAPE_NONE,
112 TK_A_STRING_ESCAPE_REPLACE,
113 TK_A_NUM_FAKE_PART, /* int */
114 TK_A_DEVLINK_PRIO, /* int */
115 TK_A_OWNER, /* val */
116 TK_A_GROUP, /* val */
117 TK_A_MODE, /* val */
118 TK_A_OWNER_ID, /* uid_t */
119 TK_A_GROUP_ID, /* gid_t */
120 TK_A_MODE_ID, /* mode_t */
121 TK_A_ENV, /* val, attr */
122 TK_A_NAME, /* val */
123 TK_A_DEVLINK, /* val */
124 TK_A_EVENT_TIMEOUT, /* int */
125 TK_A_IGNORE_REMOVE,
126 TK_A_ATTR, /* val, attr */
127 TK_A_RUN, /* val, bool */
128 TK_A_GOTO, /* size_t */
129 TK_A_LAST_RULE,
130
131 TK_END,
132 };
133
134 static const char *token_str[] = {
135 [TK_UNSET] = "UNSET",
136 [TK_RULE] = "RULE",
137
138 [TK_M_ACTION] = "M ACTION",
139 [TK_M_DEVPATH] = "M DEVPATH",
140 [TK_M_KERNEL] = "M KERNEL",
141 [TK_M_DEVLINK] = "M DEVLINK",
142 [TK_M_NAME] = "M NAME",
143 [TK_M_ENV] = "M ENV",
144 [TK_M_SUBSYSTEM] = "M SUBSYSTEM",
145 [TK_M_DRIVER] = "M DRIVER",
146 [TK_M_WAITFOR] = "M WAITFOR",
147 [TK_M_ATTR] = "M ATTR",
148
149 [TK_M_KERNELS] = "M KERNELS",
150 [TK_M_SUBSYSTEMS] = "M SUBSYSTEMS",
151 [TK_M_DRIVERS] = "M DRIVERS",
152 [TK_M_ATTRS] = "M ATTRS",
153 [TK_M_PARENTS_MAX] = "M PARENTS_MAX",
154
155 [TK_M_TEST] = "M TEST",
156 [TK_M_PROGRAM] = "M PROGRAM",
157 [TK_M_IMPORT_FILE] = "M IMPORT_FILE",
158 [TK_M_IMPORT_PROG] = "M IMPORT_PROG",
159 [TK_M_IMPORT_PARENT] = "M MPORT_PARENT",
160 [TK_M_RESULT] = "M RESULT",
161 [TK_M_MAX] = "M MAX",
162
163 [TK_A_IGNORE_DEVICE] = "A IGNORE_DEVICE",
164 [TK_A_STRING_ESCAPE_NONE] = "A STRING_ESCAPE_NONE",
165 [TK_A_STRING_ESCAPE_REPLACE] = "A STRING_ESCAPE_REPLACE",
166 [TK_A_NUM_FAKE_PART] = "A NUM_FAKE_PART",
167 [TK_A_DEVLINK_PRIO] = "A DEVLINK_PRIO",
168 [TK_A_OWNER] = "A OWNER",
169 [TK_A_GROUP] = "A GROUP",
170 [TK_A_MODE] = "A MODE",
171 [TK_A_OWNER_ID] = "A OWNER_ID",
172 [TK_A_GROUP_ID] = "A GROUP_ID",
173 [TK_A_MODE_ID] = "A MODE_ID",
174 [TK_A_ENV] = "A ENV",
175 [TK_A_NAME] = "A NAME",
176 [TK_A_DEVLINK] = "A DEVLINK",
177 [TK_A_EVENT_TIMEOUT] = "A EVENT_TIMEOUT",
178 [TK_A_IGNORE_REMOVE] = "A IGNORE_REMOVE",
179 [TK_A_ATTR] = "A ATTR",
180 [TK_A_RUN] = "A RUN",
181 [TK_A_GOTO] = "A GOTO",
182 [TK_A_LAST_RULE] = "A LAST_RULE",
183
184 [TK_END] = "END",
185 };
186
187 struct token {
188 enum token_type type;
189 union {
190 struct {
191 unsigned int next_rule;
192 unsigned int label_off;
193 unsigned int filename_off;
194 } rule;
195 struct {
196 unsigned short op;
197 unsigned short glob;
198 unsigned int value_off;
199 union {
200 unsigned int attr_off;
201 int ignore_error;
202 int i;
203 unsigned int rule_goto;
204 mode_t mode;
205 uid_t uid;
206 gid_t gid;
207 int num_fake_part;
208 int devlink_prio;
209 int event_timeout;
210 };
211 } key;
212 };
213 };
214
215 #define MAX_TK 64
216 struct rule_tmp {
217 struct udev_rules *rules;
218 struct token rule;
219 struct token token[MAX_TK];
220 unsigned int token_cur;
221 };
222
223 struct uid_gid {
224 unsigned int name_off;
225 union {
226 uid_t uid;
227 gid_t gid;
228 };
229 };
230
231 struct udev_rules {
232 struct udev *udev;
233 int resolve_names;
234
235 /* every key in the rules file becomes a token */
236 struct token *tokens;
237 unsigned int token_cur;
238 unsigned int token_max;
239
240 /* all key strings are copied to a single string buffer */
241 char *buf;
242 size_t buf_cur;
243 size_t buf_max;
244 unsigned int buf_count;
245
246 /* during rule parsing, we cache uid/gid lookup results */
247 struct uid_gid *uids;
248 unsigned int uids_cur;
249 unsigned int uids_max;
250 struct uid_gid *gids;
251 unsigned int gids_cur;
252 unsigned int gids_max;
253 };
254
255 /* NOTE: we could lookup and return existing strings, or tails of strings */
256 static int add_string(struct udev_rules *rules, const char *str)
257 {
258 size_t len = strlen(str)+1;
259 int off;
260
261 /* offset 0 is always '\0' */
262 if (str[0] == '\0')
263 return 0;
264
265 /* grow buffer if needed */
266 if (rules->buf_cur + len+1 >= rules->buf_max) {
267 char *buf;
268 unsigned int add;
269
270 /* double the buffer size */
271 add = rules->buf_max;
272 if (add < len * 8)
273 add = len * 8;
274
275 buf = realloc(rules->buf, rules->buf_max + add);
276 if (buf == NULL)
277 return -1;
278 info(rules->udev, "extend buffer from %zu to %zu\n", rules->buf_max, rules->buf_max + add);
279 rules->buf = buf;
280 rules->buf_max += add;
281 }
282 off = rules->buf_cur;
283 memcpy(&rules->buf[rules->buf_cur], str, len);
284 rules->buf_cur += len;
285 rules->buf_count++;
286 return off;
287 }
288
289 static int add_token(struct udev_rules *rules, struct token *token)
290 {
291
292 /* grow buffer if needed */
293 if (rules->token_cur+1 >= rules->token_max) {
294 struct token *tokens;
295 unsigned int add;
296
297 /* double the buffer size */
298 add = rules->token_max;
299 if (add < 8)
300 add = 8;
301
302 tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
303 if (tokens == NULL)
304 return -1;
305 info(rules->udev, "extend tokens from %u to %u\n", rules->token_max, rules->token_max + add);
306 rules->tokens = tokens;
307 rules->token_max += add;
308 }
309 memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
310 rules->token_cur++;
311 return 0;
312 }
313
314 static uid_t add_uid(struct udev_rules *rules, const char *owner)
315 {
316 unsigned int i;
317 uid_t uid;
318 unsigned int off;
319
320 /* lookup, if we know it already */
321 for (i = 0; i < rules->uids_cur; i++) {
322 off = rules->uids[i].name_off;
323 if (strcmp(&rules->buf[off], owner) == 0) {
324 uid = rules->uids[i].uid;
325 dbg(rules->udev, "return existing %u for '%s'\n", uid, owner);
326 return uid;
327 }
328 }
329 uid = util_lookup_user(rules->udev, owner);
330
331 /* grow buffer if needed */
332 if (rules->uids_cur+1 >= rules->uids_max) {
333 struct uid_gid *uids;
334 unsigned int add;
335
336 /* double the buffer size */
337 add = rules->uids_max;
338 if (add < 1)
339 add = 8;
340
341 uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
342 if (uids == NULL)
343 return uid;
344 info(rules->udev, "extend uids from %u to %u\n", rules->uids_max, rules->uids_max + add);
345 rules->uids = uids;
346 rules->uids_max += add;
347 }
348 rules->uids[rules->uids_cur].uid = uid;
349 off = add_string(rules, owner);
350 if (off <= 0)
351 return uid;
352 rules->uids[rules->uids_cur].name_off = off;
353 rules->uids_cur++;
354 return uid;
355 }
356
357 static gid_t add_gid(struct udev_rules *rules, const char *group)
358 {
359 unsigned int i;
360 gid_t gid;
361 unsigned int off;
362
363 /* lookup, if we know it already */
364 for (i = 0; i < rules->gids_cur; i++) {
365 off = rules->gids[i].name_off;
366 if (strcmp(&rules->buf[off], group) == 0) {
367 gid = rules->gids[i].gid;
368 dbg(rules->udev, "return existing %u for '%s'\n", gid, group);
369 return gid;
370 }
371 }
372 gid = util_lookup_group(rules->udev, group);
373
374 /* grow buffer if needed */
375 if (rules->gids_cur+1 >= rules->gids_max) {
376 struct uid_gid *gids;
377 unsigned int add;
378
379 /* double the buffer size */
380 add = rules->gids_max;
381 if (add < 1)
382 add = 8;
383
384 gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid));
385 if (gids == NULL)
386 return gid;
387 info(rules->udev, "extend gids from %u to %u\n", rules->gids_max, rules->gids_max + add);
388 rules->gids = gids;
389 rules->gids_max += add;
390 }
391 rules->gids[rules->gids_cur].gid = gid;
392 off = add_string(rules, group);
393 if (off <= 0)
394 return gid;
395 rules->gids[rules->gids_cur].name_off = off;
396 rules->gids_cur++;
397 return gid;
398 }
399
400 static int import_property_from_string(struct udev_device *dev, char *line)
401 {
402 struct udev *udev = udev_device_get_udev(dev);
403 char *key;
404 char *val;
405 size_t len;
406
407 /* find key */
408 key = line;
409 while (isspace(key[0]))
410 key++;
411
412 /* comment or empty line */
413 if (key[0] == '#' || key[0] == '\0')
414 return -1;
415
416 /* split key/value */
417 val = strchr(key, '=');
418 if (val == NULL)
419 return -1;
420 val[0] = '\0';
421 val++;
422
423 /* find value */
424 while (isspace(val[0]))
425 val++;
426
427 /* terminate key */
428 len = strlen(key);
429 if (len == 0)
430 return -1;
431 while (isspace(key[len-1]))
432 len--;
433 key[len] = '\0';
434
435 /* terminate value */
436 len = strlen(val);
437 if (len == 0)
438 return -1;
439 while (isspace(val[len-1]))
440 len--;
441 val[len] = '\0';
442
443 if (len == 0)
444 return -1;
445
446 /* unquote */
447 if (val[0] == '"' || val[0] == '\'') {
448 if (val[len-1] != val[0]) {
449 info(udev, "inconsistent quoting: '%s', skip\n", line);
450 return -1;
451 }
452 val[len-1] = '\0';
453 val++;
454 }
455
456 info(udev, "adding '%s'='%s'\n", key, val);
457
458 /* handle device, renamed by external tool, returning new path */
459 if (strcmp(key, "DEVPATH") == 0) {
460 char syspath[UTIL_PATH_SIZE];
461
462 info(udev, "updating devpath from '%s' to '%s'\n",
463 udev_device_get_devpath(dev), val);
464 util_strlcpy(syspath, udev_get_sys_path(udev), sizeof(syspath));
465 util_strlcat(syspath, val, sizeof(syspath));
466 udev_device_set_syspath(dev, syspath);
467 } else {
468 struct udev_list_entry *entry;
469
470 entry = udev_device_add_property(dev, key, val);
471 /* store in db */
472 udev_list_entry_set_flag(entry, 1);
473 }
474 return 0;
475 }
476
477 static int import_file_into_properties(struct udev_device *dev, const char *filename)
478 {
479 FILE *f;
480 char line[UTIL_LINE_SIZE];
481
482 f = fopen(filename, "r");
483 if (f == NULL)
484 return -1;
485 while (fgets(line, sizeof(line), f) != NULL)
486 import_property_from_string(dev, line);
487 fclose(f);
488 return 0;
489 }
490
491 static int import_program_into_properties(struct udev_device *dev, const char *program)
492 {
493 struct udev *udev = udev_device_get_udev(dev);
494 char **envp;
495 char result[2048];
496 size_t reslen;
497 char *line;
498
499 envp = udev_device_get_properties_envp(dev);
500 if (util_run_program(udev, program, envp, result, sizeof(result), &reslen) != 0)
501 return -1;
502
503 line = result;
504 while (line != NULL) {
505 char *pos;
506
507 pos = strchr(line, '\n');
508 if (pos != NULL) {
509 pos[0] = '\0';
510 pos = &pos[1];
511 }
512 import_property_from_string(dev, line);
513 line = pos;
514 }
515 return 0;
516 }
517
518 static int import_parent_into_properties(struct udev_device *dev, const char *filter)
519 {
520 struct udev *udev = udev_device_get_udev(dev);
521 struct udev_device *dev_parent;
522 struct udev_list_entry *list_entry;
523
524 dev_parent = udev_device_get_parent(dev);
525 if (dev_parent == NULL)
526 return -1;
527
528 dbg(udev, "found parent '%s', get the node name\n", udev_device_get_syspath(dev_parent));
529 udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
530 const char *key = udev_list_entry_get_name(list_entry);
531 const char *val = udev_list_entry_get_value(list_entry);
532
533 if (fnmatch(filter, key, 0) == 0) {
534 struct udev_list_entry *entry;
535
536 dbg(udev, "import key '%s=%s'\n", key, val);
537 entry = udev_device_add_property(dev, key, val);
538 /* store in db */
539 udev_list_entry_set_flag(entry, 1);
540 }
541 }
542 return 0;
543 }
544
545 #define WAIT_LOOP_PER_SECOND 50
546 static int wait_for_file(struct udev_device *dev, const char *file, int timeout)
547 {
548 struct udev *udev = udev_device_get_udev(dev);
549 char filepath[UTIL_PATH_SIZE];
550 char devicepath[UTIL_PATH_SIZE];
551 struct stat stats;
552 int loop = timeout * WAIT_LOOP_PER_SECOND;
553
554 /* a relative path is a device attribute */
555 devicepath[0] = '\0';
556 if (file[0] != '/') {
557 util_strlcpy(devicepath, udev_get_sys_path(udev), sizeof(devicepath));
558 util_strlcat(devicepath, udev_device_get_devpath(dev), sizeof(devicepath));
559
560 util_strlcpy(filepath, devicepath, sizeof(filepath));
561 util_strlcat(filepath, "/", sizeof(filepath));
562 util_strlcat(filepath, file, sizeof(filepath));
563 file = filepath;
564 }
565
566 dbg(udev, "will wait %i sec for '%s'\n", timeout, file);
567 while (--loop) {
568 /* lookup file */
569 if (stat(file, &stats) == 0) {
570 info(udev, "file '%s' appeared after %i loops\n", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
571 return 0;
572 }
573 /* make sure, the device did not disappear in the meantime */
574 if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
575 info(udev, "device disappeared while waiting for '%s'\n", file);
576 return -2;
577 }
578 info(udev, "wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND);
579 usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND);
580 }
581 info(udev, "waiting for '%s' failed\n", file);
582 return -1;
583 }
584
585 static int attr_subst_subdir(char *attr, size_t len)
586 {
587 char *pos;
588 int found = 0;
589
590 pos = strstr(attr, "/*/");
591 if (pos != NULL) {
592 char str[UTIL_PATH_SIZE];
593 DIR *dir;
594
595 pos[1] = '\0';
596 util_strlcpy(str, &pos[2], sizeof(str));
597 dir = opendir(attr);
598 if (dir != NULL) {
599 struct dirent *dent;
600
601 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
602 struct stat stats;
603
604 if (dent->d_name[0] == '.')
605 continue;
606 util_strlcat(attr, dent->d_name, len);
607 util_strlcat(attr, str, len);
608 if (stat(attr, &stats) == 0) {
609 found = 1;
610 break;
611 }
612 pos[1] = '\0';
613 }
614 closedir(dir);
615 }
616 if (!found)
617 util_strlcat(attr, str, len);
618 }
619
620 return found;
621 }
622
623 static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value)
624 {
625 char *linepos;
626 char *temp;
627
628 linepos = *line;
629 if (linepos == NULL && linepos[0] == '\0')
630 return -1;
631
632 /* skip whitespace */
633 while (isspace(linepos[0]) || linepos[0] == ',')
634 linepos++;
635
636 /* get the key */
637 if (linepos[0] == '\0')
638 return -1;
639 *key = linepos;
640
641 while (1) {
642 linepos++;
643 if (linepos[0] == '\0')
644 return -1;
645 if (isspace(linepos[0]))
646 break;
647 if (linepos[0] == '=')
648 break;
649 if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
650 if (linepos[1] == '=')
651 break;
652 }
653
654 /* remember end of key */
655 temp = linepos;
656
657 /* skip whitespace after key */
658 while (isspace(linepos[0]))
659 linepos++;
660 if (linepos[0] == '\0')
661 return -1;
662
663 /* get operation type */
664 if (linepos[0] == '=' && linepos[1] == '=') {
665 *op = OP_MATCH;
666 linepos += 2;
667 } else if (linepos[0] == '!' && linepos[1] == '=') {
668 *op = OP_NOMATCH;
669 linepos += 2;
670 } else if (linepos[0] == '+' && linepos[1] == '=') {
671 *op = OP_ADD;
672 linepos += 2;
673 } else if (linepos[0] == '=') {
674 *op = OP_ASSIGN;
675 linepos++;
676 } else if (linepos[0] == ':' && linepos[1] == '=') {
677 *op = OP_ASSIGN_FINAL;
678 linepos += 2;
679 } else
680 return -1;
681
682 /* terminate key */
683 temp[0] = '\0';
684
685 /* skip whitespace after operator */
686 while (isspace(linepos[0]))
687 linepos++;
688 if (linepos[0] == '\0')
689 return -1;
690
691 /* get the value */
692 if (linepos[0] == '"')
693 linepos++;
694 else
695 return -1;
696 *value = linepos;
697
698 /* terminate */
699 temp = strchr(linepos, '"');
700 if (!temp)
701 return -1;
702 temp[0] = '\0';
703 temp++;
704 dbg(udev, "%s '%s'-'%s'\n", operation_str[*op], *key, *value);
705
706 /* move line to next key */
707 *line = temp;
708 return 0;
709 }
710
711 /* extract possible KEY{attr} */
712 static char *get_key_attribute(struct udev *udev, char *str)
713 {
714 char *pos;
715 char *attr;
716
717 attr = strchr(str, '{');
718 if (attr != NULL) {
719 attr++;
720 pos = strchr(attr, '}');
721 if (pos == NULL) {
722 err(udev, "missing closing brace for format\n");
723 return NULL;
724 }
725 pos[0] = '\0';
726 dbg(udev, "attribute='%s'\n", attr);
727 return attr;
728 }
729 return NULL;
730 }
731
732 static int rule_add_token(struct rule_tmp *rule_tmp, enum token_type type,
733 enum operation_type op,
734 const char *value, const void *data)
735 {
736 struct token *token = &rule_tmp->token[rule_tmp->token_cur];
737 const char *attr = data;
738 enum string_glob_type glob;
739
740 memset(token, 0x00, sizeof(struct token));
741
742 switch (type) {
743 case TK_M_ACTION:
744 case TK_M_DEVPATH:
745 case TK_M_KERNEL:
746 case TK_M_SUBSYSTEM:
747 case TK_M_DRIVER:
748 case TK_M_WAITFOR:
749 case TK_M_DEVLINK:
750 case TK_M_NAME:
751 case TK_M_KERNELS:
752 case TK_M_SUBSYSTEMS:
753 case TK_M_DRIVERS:
754 case TK_M_PROGRAM:
755 case TK_M_IMPORT_FILE:
756 case TK_M_IMPORT_PROG:
757 case TK_M_IMPORT_PARENT:
758 case TK_M_RESULT:
759 case TK_A_OWNER:
760 case TK_A_GROUP:
761 case TK_A_MODE:
762 case TK_A_NAME:
763 case TK_A_DEVLINK:
764 case TK_A_GOTO:
765 token->key.value_off = add_string(rule_tmp->rules, value);
766 break;
767 case TK_M_ENV:
768 case TK_M_ATTR:
769 case TK_M_ATTRS:
770 case TK_A_ATTR:
771 case TK_A_ENV:
772 token->key.value_off = add_string(rule_tmp->rules, value);
773 token->key.attr_off = add_string(rule_tmp->rules, attr);
774 break;
775 case TK_M_TEST:
776 token->key.value_off = add_string(rule_tmp->rules, value);
777 if (data != NULL)
778 token->key.mode = *(mode_t *)data;
779 break;
780 case TK_A_IGNORE_DEVICE:
781 case TK_A_STRING_ESCAPE_NONE:
782 case TK_A_STRING_ESCAPE_REPLACE:
783 case TK_A_IGNORE_REMOVE:
784 case TK_A_LAST_RULE:
785 break;
786 case TK_A_RUN:
787 token->key.value_off = add_string(rule_tmp->rules, value);
788 token->key.ignore_error = *(int *)data;
789 break;
790 case TK_A_NUM_FAKE_PART:
791 token->key.num_fake_part = *(int *)data;
792 break;
793 case TK_A_DEVLINK_PRIO:
794 token->key.devlink_prio = *(int *)data;
795 break;
796 case TK_A_OWNER_ID:
797 token->key.uid = *(uid_t *)data;
798 break;
799 case TK_A_GROUP_ID:
800 token->key.gid = *(gid_t *)data;
801 break;
802 case TK_A_MODE_ID:
803 token->key.mode = *(mode_t *)data;
804 break;
805 case TK_A_EVENT_TIMEOUT:
806 token->key.event_timeout = *(int *)data;
807 break;
808 case TK_RULE:
809 case TK_M_PARENTS_MAX:
810 case TK_M_MAX:
811 case TK_END:
812 case TK_UNSET:
813 err(rule_tmp->rules->udev, "wrong type %u\n", type);
814 return -1;
815 }
816
817 glob = GL_PLAIN;
818 if (value != NULL) {
819 if (type < TK_M_MAX) {
820 /* check if we need to split or call fnmatch() while matching rules */
821 int has_split;
822 int has_glob;
823
824 has_split = (strchr(value, '|') != NULL);
825 has_glob = (strchr(value, '*') != NULL || strchr(value, '?') != NULL ||
826 strchr(value, '[') != NULL || strchr(value, ']') != NULL);
827 if (has_split && has_glob) {
828 glob = GL_SPLIT_GLOB;
829 } else if (has_split) {
830 glob = GL_SPLIT;
831 } else if (has_glob) {
832 if (strcmp(value, "?*") == 0)
833 glob = GL_SOMETHING;
834 else
835 glob = GL_GLOB;
836 }
837 } else {
838 /* check if we need to substitute format strings for matching rules */
839 if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
840 glob = GL_FORMAT;
841 }
842 }
843
844 token->type = type;
845 token->key.op = op;
846 token->key.glob = glob;
847 rule_tmp->token_cur++;
848 if (rule_tmp->token_cur >= ARRAY_SIZE(rule_tmp->token)) {
849 err(rule_tmp->rules->udev, "temporary rule array too small\n");
850 return -1;
851 }
852 return 0;
853 }
854
855 #ifdef DEBUG
856 static void dump_token(struct udev_rules *rules, struct token *token)
857 {
858 enum token_type type = token->type;
859 enum operation_type op = token->key.op;
860 enum string_glob_type glob = token->key.glob;
861 const char *value = &rules->buf[token->key.value_off];
862 const char *attr = &rules->buf[token->key.attr_off];
863
864 switch (type) {
865 case TK_RULE:
866 {
867 const char *tks_ptr = (char *)rules->tokens;
868 const char *tk_ptr = (char *)token;
869 unsigned int off = tk_ptr - tks_ptr;
870
871 dbg(rules->udev, "* RULE '%s', off: %u(%u), next: %u, label: '%s'\n",
872 &rules->buf[token->rule.filename_off],
873 off / (unsigned int) sizeof(struct token), off,
874 token->rule.next_rule,
875 &rules->buf[token->rule.label_off]);
876 break;
877 }
878 case TK_M_ACTION:
879 case TK_M_DEVPATH:
880 case TK_M_KERNEL:
881 case TK_M_SUBSYSTEM:
882 case TK_M_DRIVER:
883 case TK_M_WAITFOR:
884 case TK_M_DEVLINK:
885 case TK_M_NAME:
886 case TK_M_KERNELS:
887 case TK_M_SUBSYSTEMS:
888 case TK_M_DRIVERS:
889 case TK_M_PROGRAM:
890 case TK_M_IMPORT_FILE:
891 case TK_M_IMPORT_PROG:
892 case TK_M_IMPORT_PARENT:
893 case TK_M_RESULT:
894 case TK_A_NAME:
895 case TK_A_DEVLINK:
896 case TK_A_OWNER:
897 case TK_A_GROUP:
898 case TK_A_MODE:
899 case TK_A_RUN:
900 dbg(rules->udev, "%s %s '%s'(%s)\n",
901 token_str[type], operation_str[op], value, string_glob_str[glob]);
902 break;
903 case TK_M_ATTR:
904 case TK_M_ATTRS:
905 case TK_M_ENV:
906 case TK_A_ATTR:
907 case TK_A_ENV:
908 dbg(rules->udev, "%s %s '%s' '%s'(%s)\n",
909 token_str[type], operation_str[op], attr, value, string_glob_str[glob]);
910 break;
911 case TK_A_IGNORE_DEVICE:
912 case TK_A_STRING_ESCAPE_NONE:
913 case TK_A_STRING_ESCAPE_REPLACE:
914 case TK_A_LAST_RULE:
915 case TK_A_IGNORE_REMOVE:
916 dbg(rules->udev, "%s\n", token_str[type]);
917 break;
918 case TK_M_TEST:
919 dbg(rules->udev, "%s %s '%s'(%s) %#o\n",
920 token_str[type], operation_str[op], value, string_glob_str[glob], token->key.mode);
921 break;
922 case TK_A_NUM_FAKE_PART:
923 dbg(rules->udev, "%s %u\n", token_str[type], token->key.num_fake_part);
924 break;
925 case TK_A_DEVLINK_PRIO:
926 dbg(rules->udev, "%s %s %u\n", token_str[type], operation_str[op], token->key.devlink_prio);
927 break;
928 case TK_A_OWNER_ID:
929 dbg(rules->udev, "%s %s %u\n", token_str[type], operation_str[op], token->key.uid);
930 break;
931 case TK_A_GROUP_ID:
932 dbg(rules->udev, "%s %s %u\n", token_str[type], operation_str[op], token->key.gid);
933 break;
934 case TK_A_MODE_ID:
935 dbg(rules->udev, "%s %s %#o\n", token_str[type], operation_str[op], token->key.mode);
936 break;
937 case TK_A_EVENT_TIMEOUT:
938 dbg(rules->udev, "%s %s %u\n", token_str[type], operation_str[op], token->key.event_timeout);
939 break;
940 case TK_A_GOTO:
941 dbg(rules->udev, "%s '%s' %u\n", token_str[type], value, token->key.rule_goto);
942 break;
943 case TK_END:
944 dbg(rules->udev, "* %s\n", token_str[type]);
945 break;
946 case TK_M_PARENTS_MAX:
947 case TK_M_MAX:
948 case TK_UNSET:
949 dbg(rules->udev, "unknown type %u\n", type);
950 break;
951 }
952 }
953
954 static void dump_rules(struct udev_rules *rules)
955 {
956 unsigned int i;
957
958 dbg(rules->udev, "dumping %u (%zu bytes) tokens, %u (%zu bytes) strings\n",
959 rules->token_cur,
960 rules->token_cur * sizeof(struct token),
961 rules->buf_count,
962 rules->buf_cur);
963 for(i = 0; i < rules->token_cur; i++)
964 dump_token(rules, &rules->tokens[i]);
965 }
966 #else
967 static inline void dump_token(struct udev_rules *rules, struct token *token) {}
968 static inline void dump_rules(struct udev_rules *rules) {}
969 #endif /* DEBUG */
970
971 static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp)
972 {
973 unsigned int i;
974 unsigned int start = 0;
975 unsigned int end = rule_tmp->token_cur;
976
977 for (i = 0; i < rule_tmp->token_cur; i++) {
978 enum token_type next_val = TK_UNSET;
979 unsigned int next_idx;
980 unsigned int j;
981
982 /* find smallest value */
983 for (j = start; j < end; j++) {
984 if (rule_tmp->token[j].type == TK_UNSET)
985 continue;
986 if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
987 next_val = rule_tmp->token[j].type;
988 next_idx = j;
989 }
990 }
991
992 /* add token and mark done */
993 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
994 return -1;
995 rule_tmp->token[next_idx].type = TK_UNSET;
996
997 /* shrink range */
998 if (next_idx == start)
999 start++;
1000 if (next_idx+1 == end)
1001 end--;
1002 }
1003 return 0;
1004 }
1005
1006 static int add_rule(struct udev_rules *rules, char *line,
1007 const char *filename, unsigned int filename_off, unsigned int lineno)
1008 {
1009 int valid = 0;
1010 char *linepos;
1011 char *attr;
1012 int physdev = 0;
1013 struct rule_tmp rule_tmp;
1014
1015 memset(&rule_tmp, 0x00, sizeof(struct rule_tmp));
1016 rule_tmp.rules = rules;
1017 rule_tmp.rule.type = TK_RULE;
1018 rule_tmp.rule.rule.filename_off = filename_off;
1019
1020 linepos = line;
1021 while (1) {
1022 char *key;
1023 char *value;
1024 enum operation_type op;
1025
1026 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0)
1027 break;
1028
1029 if (strcasecmp(key, "ACTION") == 0) {
1030 if (op > OP_MATCH_MAX) {
1031 err(rules->udev, "invalid ACTION operation\n");
1032 goto invalid;
1033 }
1034 rule_add_token(&rule_tmp, TK_M_ACTION, op, value, NULL);
1035 valid = 1;
1036 continue;
1037 }
1038
1039 if (strcasecmp(key, "DEVPATH") == 0) {
1040 if (op > OP_MATCH_MAX) {
1041 err(rules->udev, "invalid DEVPATH operation\n");
1042 goto invalid;
1043 }
1044 rule_add_token(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
1045 valid = 1;
1046 continue;
1047 }
1048
1049 if (strcasecmp(key, "KERNEL") == 0) {
1050 if (op > OP_MATCH_MAX) {
1051 err(rules->udev, "invalid KERNEL operation\n");
1052 goto invalid;
1053 }
1054 rule_add_token(&rule_tmp, TK_M_KERNEL, op, value, NULL);
1055 valid = 1;
1056 continue;
1057 }
1058
1059 if (strcasecmp(key, "SUBSYSTEM") == 0) {
1060 if (op > OP_MATCH_MAX) {
1061 err(rules->udev, "invalid SUBSYSTEM operation\n");
1062 goto invalid;
1063 }
1064 /* bus, class, subsystem events should all be the same */
1065 if (strcmp(value, "subsystem") == 0 ||
1066 strcmp(value, "bus") == 0 ||
1067 strcmp(value, "class") == 0) {
1068 if (strcmp(value, "bus") == 0 || strcmp(value, "class") == 0)
1069 err(rules->udev, "'%s' must be specified as 'subsystem' \n"
1070 "please fix it in %s:%u", value, filename, lineno);
1071 rule_add_token(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
1072 } else
1073 rule_add_token(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
1074 valid = 1;
1075 continue;
1076 }
1077
1078 if (strcasecmp(key, "DRIVER") == 0) {
1079 if (op > OP_MATCH_MAX) {
1080 err(rules->udev, "invalid DRIVER operation\n");
1081 goto invalid;
1082 }
1083 rule_add_token(&rule_tmp, TK_M_DRIVER, op, value, NULL);
1084 valid = 1;
1085 continue;
1086 }
1087
1088 if (strncasecmp(key, "ATTR{", sizeof("ATTR{")-1) == 0) {
1089 attr = get_key_attribute(rules->udev, key + sizeof("ATTR")-1);
1090 if (attr == NULL) {
1091 err(rules->udev, "error parsing ATTR attribute\n");
1092 goto invalid;
1093 }
1094 if (op < OP_MATCH_MAX) {
1095 rule_add_token(&rule_tmp, TK_M_ATTR, op, value, attr);
1096 } else {
1097 rule_add_token(&rule_tmp, TK_A_ATTR, op, value, attr);
1098 }
1099 valid = 1;
1100 continue;
1101 }
1102
1103 if (strcasecmp(key, "KERNELS") == 0 ||
1104 strcasecmp(key, "ID") == 0) {
1105 if (op > OP_MATCH_MAX) {
1106 err(rules->udev, "invalid KERNELS operation\n");
1107 goto invalid;
1108 }
1109 rule_add_token(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1110 valid = 1;
1111 continue;
1112 }
1113
1114 if (strcasecmp(key, "SUBSYSTEMS") == 0 ||
1115 strcasecmp(key, "BUS") == 0) {
1116 if (op > OP_MATCH_MAX) {
1117 err(rules->udev, "invalid SUBSYSTEMS operation\n");
1118 goto invalid;
1119 }
1120 rule_add_token(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1121 valid = 1;
1122 continue;
1123 }
1124
1125 if (strcasecmp(key, "DRIVERS") == 0) {
1126 if (op > OP_MATCH_MAX) {
1127 err(rules->udev, "invalid DRIVERS operation\n");
1128 goto invalid;
1129 }
1130 rule_add_token(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
1131 valid = 1;
1132 continue;
1133 }
1134
1135 if (strncasecmp(key, "ATTRS{", sizeof("ATTRS{")-1) == 0 ||
1136 strncasecmp(key, "SYSFS{", sizeof("SYSFS{")-1) == 0) {
1137 if (op > OP_MATCH_MAX) {
1138 err(rules->udev, "invalid ATTRS operation\n");
1139 goto invalid;
1140 }
1141 attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
1142 if (attr == NULL) {
1143 err(rules->udev, "error parsing ATTRS attribute\n");
1144 goto invalid;
1145 }
1146 if (strncmp(attr, "device/", 7) == 0)
1147 err(rules->udev, "the 'device' link may not be available in a future kernel, "
1148 "please fix it in %s:%u", filename, lineno);
1149 else if (strstr(attr, "../") != NULL)
1150 err(rules->udev, "do not reference parent sysfs directories directly, "
1151 "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
1152 rule_add_token(&rule_tmp, TK_M_ATTRS, op, value, attr);
1153 valid = 1;
1154 continue;
1155 }
1156
1157 if (strncasecmp(key, "ENV{", sizeof("ENV{")-1) == 0) {
1158 attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1);
1159 if (attr == NULL) {
1160 err(rules->udev, "error parsing ENV attribute\n");
1161 goto invalid;
1162 }
1163 if (strncmp(attr, "PHYSDEV", 7) == 0)
1164 physdev = 1;
1165 if (op < OP_MATCH_MAX) {
1166 if (rule_add_token(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
1167 goto invalid;
1168 } else {
1169 if (rule_add_token(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
1170 goto invalid;
1171 }
1172 valid = 1;
1173 continue;
1174 }
1175
1176 if (strcasecmp(key, "PROGRAM") == 0) {
1177 rule_add_token(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
1178 valid = 1;
1179 continue;
1180 }
1181
1182 if (strcasecmp(key, "RESULT") == 0) {
1183 if (op > OP_MATCH_MAX) {
1184 err(rules->udev, "invalid RESULT operation\n");
1185 goto invalid;
1186 }
1187 rule_add_token(&rule_tmp, TK_M_RESULT, op, value, NULL);
1188 valid = 1;
1189 continue;
1190 }
1191
1192 if (strncasecmp(key, "IMPORT", sizeof("IMPORT")-1) == 0) {
1193 attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1);
1194 if (attr != NULL && strstr(attr, "program")) {
1195 dbg(rules->udev, "IMPORT will be executed\n");
1196 rule_add_token(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1197 valid = 1;
1198 } else if (attr != NULL && strstr(attr, "file")) {
1199 dbg(rules->udev, "IMPORT will be included as file\n");
1200 rule_add_token(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1201 valid = 1;
1202 } else if (attr != NULL && strstr(attr, "parent")) {
1203 dbg(rules->udev, "IMPORT will include the parent values\n");
1204 rule_add_token(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
1205 valid = 1;
1206 } else {
1207 /* figure it out if it is executable */
1208 char file[UTIL_PATH_SIZE];
1209 char *pos;
1210 struct stat statbuf;
1211
1212 util_strlcpy(file, value, sizeof(file));
1213 pos = strchr(file, ' ');
1214 if (pos)
1215 pos[0] = '\0';
1216
1217 /* allow programs in /lib/udev called without the path */
1218 if (strchr(file, '/') == NULL) {
1219 util_strlcpy(file, UDEV_PREFIX "/lib/udev/", sizeof(file));
1220 util_strlcat(file, value, sizeof(file));
1221 pos = strchr(file, ' ');
1222 if (pos)
1223 pos[0] = '\0';
1224 }
1225
1226 dbg(rules->udev, "IMPORT auto mode for '%s'\n", file);
1227 if (!lstat(file, &statbuf) && (statbuf.st_mode & S_IXUSR)) {
1228 dbg(rules->udev, "IMPORT will be executed (autotype)\n");
1229 rule_add_token(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1230 valid = 1;
1231 } else {
1232 dbg(rules->udev, "IMPORT will be included as file (autotype)\n");
1233 rule_add_token(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1234 valid = 1;
1235 }
1236 }
1237 continue;
1238 }
1239
1240 if (strncasecmp(key, "TEST", sizeof("TEST")-1) == 0) {
1241 mode_t mode = 0;
1242
1243 if (op > OP_MATCH_MAX) {
1244 err(rules->udev, "invalid TEST operation\n");
1245 goto invalid;
1246 }
1247 attr = get_key_attribute(rules->udev, key + sizeof("TEST")-1);
1248 if (attr != NULL) {
1249 mode = strtol(attr, NULL, 8);
1250 rule_add_token(&rule_tmp, TK_M_TEST, op, value, &mode);
1251 } else {
1252 rule_add_token(&rule_tmp, TK_M_TEST, op, value, NULL);
1253 }
1254 valid = 1;
1255 continue;
1256 }
1257
1258 if (strncasecmp(key, "RUN", sizeof("RUN")-1) == 0) {
1259 int flag = 0;
1260
1261 attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1);
1262 if (attr != NULL && strstr(attr, "ignore_error"))
1263 flag = 1;
1264 rule_add_token(&rule_tmp, TK_A_RUN, op, value, &flag);
1265 valid = 1;
1266 continue;
1267 }
1268
1269 if (strcasecmp(key, "WAIT_FOR") == 0 || strcasecmp(key, "WAIT_FOR_SYSFS") == 0) {
1270 rule_add_token(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1271 valid = 1;
1272 continue;
1273 }
1274
1275 if (strcasecmp(key, "LABEL") == 0) {
1276 rule_tmp.rule.rule.label_off = add_string(rules, value);
1277 valid = 1;
1278 continue;
1279 }
1280
1281 if (strcasecmp(key, "GOTO") == 0) {
1282 rule_add_token(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1283 valid = 1;
1284 continue;
1285 }
1286
1287 if (strncasecmp(key, "NAME", sizeof("NAME")-1) == 0) {
1288 if (op < OP_MATCH_MAX) {
1289 rule_add_token(&rule_tmp, TK_M_NAME, op, value, NULL);
1290 } else {
1291 if (value[0] == '\0')
1292 dbg(rules->udev, "name empty, node creation suppressed\n");
1293 rule_add_token(&rule_tmp, TK_A_NAME, op, value, NULL);
1294 attr = get_key_attribute(rules->udev, key + sizeof("NAME")-1);
1295 if (attr != NULL) {
1296 if (strstr(attr, "all_partitions") != NULL) {
1297 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1298
1299 dbg(rules->udev, "creation of partition nodes requested\n");
1300 rule_add_token(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1301 }
1302 if (strstr(attr, "ignore_remove") != NULL) {
1303 dbg(rules->udev, "remove event should be ignored\n");
1304 rule_add_token(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1305 }
1306 }
1307 }
1308 continue;
1309 }
1310
1311 if (strcasecmp(key, "SYMLINK") == 0) {
1312 if (op < OP_MATCH_MAX)
1313 rule_add_token(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
1314 else
1315 rule_add_token(&rule_tmp, TK_A_DEVLINK, op, value, NULL);
1316 valid = 1;
1317 continue;
1318 }
1319
1320 if (strcasecmp(key, "OWNER") == 0) {
1321 uid_t uid;
1322 char *endptr;
1323
1324 uid = strtoul(value, &endptr, 10);
1325 if (endptr[0] == '\0') {
1326 rule_add_token(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1327 } else if (rules->resolve_names && strchr("$%", value[0]) == NULL) {
1328 uid = add_uid(rules, value);
1329 rule_add_token(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1330 } else {
1331 rule_add_token(&rule_tmp, TK_A_OWNER, op, value, NULL);
1332 }
1333 valid = 1;
1334 continue;
1335 }
1336
1337 if (strcasecmp(key, "GROUP") == 0) {
1338 gid_t gid;
1339 char *endptr;
1340
1341 gid = strtoul(value, &endptr, 10);
1342 if (endptr[0] == '\0') {
1343 rule_add_token(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1344 } else if (rules->resolve_names && strchr("$%", value[0]) == NULL) {
1345 gid = add_gid(rules, value);
1346 rule_add_token(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1347 } else {
1348 rule_add_token(&rule_tmp, TK_A_GROUP, op, value, NULL);
1349 }
1350 valid = 1;
1351 continue;
1352 }
1353
1354 if (strcasecmp(key, "MODE") == 0) {
1355 mode_t mode;
1356 char *endptr;
1357
1358 mode = strtol(value, &endptr, 8);
1359 if (endptr[0] == '\0')
1360 rule_add_token(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1361 else
1362 rule_add_token(&rule_tmp, TK_A_MODE, op, value, NULL);
1363 valid = 1;
1364 continue;
1365 }
1366
1367 if (strcasecmp(key, "OPTIONS") == 0) {
1368 const char *pos;
1369
1370 if (strstr(value, "last_rule") != NULL) {
1371 dbg(rules->udev, "last rule to be applied\n");
1372 rule_add_token(&rule_tmp, TK_A_LAST_RULE, 0, NULL, NULL);
1373 }
1374 if (strstr(value, "ignore_device") != NULL) {
1375 dbg(rules->udev, "device should be ignored\n");
1376 rule_add_token(&rule_tmp, TK_A_IGNORE_DEVICE, 0, NULL, NULL);
1377 }
1378 if (strstr(value, "ignore_remove") != NULL) {
1379 dbg(rules->udev, "remove event should be ignored\n");
1380 rule_add_token(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1381 }
1382 pos = strstr(value, "link_priority=");
1383 if (pos != NULL) {
1384 int prio = atoi(&pos[strlen("link_priority=")]);
1385
1386 rule_add_token(&rule_tmp, TK_A_DEVLINK_PRIO, 0, NULL, &prio);
1387 dbg(rules->udev, "link priority=%i\n", prio);
1388 }
1389 pos = strstr(value, "event_timeout=");
1390 if (pos != NULL) {
1391 int tout = atoi(&pos[strlen("event_timeout=")]);
1392
1393 rule_add_token(&rule_tmp, TK_A_EVENT_TIMEOUT, 0, NULL, &tout);
1394 dbg(rules->udev, "event timout=%i\n", tout);
1395 }
1396 pos = strstr(value, "string_escape=");
1397 if (pos != NULL) {
1398 pos = &pos[strlen("string_escape=")];
1399 if (strncmp(pos, "none", strlen("none")) == 0)
1400 rule_add_token(&rule_tmp, TK_A_STRING_ESCAPE_NONE, 0, NULL, NULL);
1401 else if (strncmp(pos, "replace", strlen("replace")) == 0)
1402 rule_add_token(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, 0, NULL, NULL);
1403 }
1404 if (strstr(value, "all_partitions") != NULL) {
1405 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1406
1407 rule_add_token(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1408 dbg(rules->udev, "creation of partition nodes requested\n");
1409 }
1410 valid = 1;
1411 continue;
1412 }
1413 err(rules->udev, "unknown key '%s' in %s:%u\n", key, filename, lineno);
1414 }
1415
1416 if (physdev)
1417 err(rules->udev, "PHYSDEV* values are deprecated and not available on recent kernels, \n"
1418 "please fix it in %s:%u", filename, lineno);
1419
1420 /* skip line if not any valid key was found */
1421 if (!valid)
1422 goto invalid;
1423
1424 /* add rule token */
1425 if (add_token(rules, &rule_tmp.rule) != 0)
1426 goto invalid;
1427
1428 /* add tokens to list, sorted by type */
1429 if (sort_token(rules, &rule_tmp) != 0)
1430 goto invalid;
1431 return 0;
1432 invalid:
1433 err(rules->udev, "invalid rule '%s:%u'\n", filename, lineno);
1434 return -1;
1435 }
1436
1437 static int parse_file(struct udev_rules *rules, const char *filename)
1438 {
1439 FILE *f;
1440 unsigned int filename_off;
1441 unsigned int first_token;
1442 char line[UTIL_LINE_SIZE];
1443 int line_nr = 0;
1444 unsigned int i;
1445
1446 info(rules->udev, "reading '%s' as rules file\n", filename);
1447
1448 f = fopen(filename, "r");
1449 if (f == NULL)
1450 return -1;
1451
1452 filename_off = add_string(rules, filename);
1453 first_token = rules->token_cur;
1454
1455 while(fgets(line, sizeof(line), f) != NULL) {
1456 char *key;
1457 size_t len;
1458
1459 /* skip whitespace */
1460 line_nr++;
1461 key = line;
1462 while (isspace(key[0]))
1463 key++;
1464
1465 /* comment */
1466 if (key[0] == '#')
1467 continue;
1468
1469 len = strlen(line);
1470 if (len < 3)
1471 continue;
1472
1473 /* continue reading if backslash+newline is found */
1474 while (line[len-2] == '\\') {
1475 if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1476 break;
1477 line_nr++;
1478 len = strlen(line);
1479 }
1480
1481 if (len+1 >= sizeof(line)) {
1482 err(rules->udev, "line too long '%s':%u, ignored\n", filename, line_nr);
1483 continue;
1484 }
1485 add_rule(rules, key, filename, filename_off, line_nr);
1486 }
1487 fclose(f);
1488
1489 /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1490 for (i = first_token+1; i < rules->token_cur; i++) {
1491 if (rules->tokens[i].type == TK_A_GOTO) {
1492 char *label = &rules->buf[rules->tokens[i].key.value_off];
1493 unsigned int j;
1494
1495 for (j = i+1; j < rules->token_cur; j++) {
1496 if (rules->tokens[j].type != TK_RULE)
1497 continue;
1498 if (rules->tokens[j].rule.label_off == 0)
1499 continue;
1500 if (strcmp(label, &rules->buf[rules->tokens[j].rule.label_off]) != 0)
1501 continue;
1502 rules->tokens[i].key.rule_goto = j;
1503 }
1504 if (rules->tokens[i].key.rule_goto == 0)
1505 err(rules->udev, "GOTO '%s' has no matching label in: '%s'\n", label, filename);
1506 }
1507 }
1508 return 0;
1509 }
1510
1511 static int add_matching_files(struct udev *udev, struct udev_list_node *file_list, const char *dirname, const char *suffix)
1512 {
1513 struct dirent *ent;
1514 DIR *dir;
1515 char filename[UTIL_PATH_SIZE];
1516
1517 dbg(udev, "open directory '%s'\n", dirname);
1518 dir = opendir(dirname);
1519 if (dir == NULL) {
1520 err(udev, "unable to open '%s': %m\n", dirname);
1521 return -1;
1522 }
1523
1524 while (1) {
1525 ent = readdir(dir);
1526 if (ent == NULL || ent->d_name[0] == '\0')
1527 break;
1528
1529 if ((ent->d_name[0] == '.') || (ent->d_name[0] == '#'))
1530 continue;
1531
1532 /* look for file matching with specified suffix */
1533 if (suffix != NULL) {
1534 const char *ext;
1535
1536 ext = strrchr(ent->d_name, '.');
1537 if (ext == NULL)
1538 continue;
1539 if (strcmp(ext, suffix) != 0)
1540 continue;
1541 }
1542 dbg(udev, "put file '%s/%s' into list\n", dirname, ent->d_name);
1543
1544 snprintf(filename, sizeof(filename), "%s/%s", dirname, ent->d_name);
1545 filename[sizeof(filename)-1] = '\0';
1546 udev_list_entry_add(udev, file_list, filename, NULL, 1, 1);
1547 }
1548
1549 closedir(dir);
1550 return 0;
1551 }
1552
1553 struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
1554 {
1555 struct udev_rules *rules;
1556 struct stat statbuf;
1557 char filename[PATH_MAX];
1558 struct udev_list_node file_list;
1559 struct udev_list_entry *file_loop, *file_tmp;
1560 unsigned int prev_rule;
1561 struct token end_token;
1562 unsigned int i;
1563
1564 rules = malloc(sizeof(struct udev_rules));
1565 if (rules == NULL)
1566 return NULL;
1567 memset(rules, 0x00, sizeof(struct udev_rules));
1568 rules->udev = udev;
1569 rules->resolve_names = resolve_names;
1570 udev_list_init(&file_list);
1571
1572 /* init token array and string buffer */
1573 rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
1574 if (rules->tokens == NULL)
1575 return NULL;
1576 rules->token_max = PREALLOC_TOKEN;
1577 rules->buf = malloc(PREALLOC_STRBUF);
1578 if (rules->buf == NULL)
1579 return NULL;
1580 rules->buf_max = PREALLOC_STRBUF;
1581 /* offset 0 is always '\0' */
1582 rules->buf[0] = '\0';
1583 rules->buf_cur = 1;
1584 info(udev, "prealloc %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1585 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1586
1587 if (udev_get_rules_path(udev) != NULL) {
1588 /* custom rules location for testing */
1589 add_matching_files(udev, &file_list, udev_get_rules_path(udev), ".rules");
1590 } else {
1591 struct udev_list_node sort_list;
1592 struct udev_list_entry *sort_loop, *sort_tmp;
1593
1594 /* read user/custom rules */
1595 add_matching_files(udev, &file_list, SYSCONFDIR "/udev/rules.d", ".rules");
1596
1597 /* read dynamic/temporary rules */
1598 util_strlcpy(filename, udev_get_dev_path(udev), sizeof(filename));
1599 util_strlcat(filename, "/.udev/rules.d", sizeof(filename));
1600 if (stat(filename, &statbuf) != 0) {
1601 util_create_path(udev, filename);
1602 udev_selinux_setfscreatecon(udev, filename, S_IFDIR|0755);
1603 mkdir(filename, 0755);
1604 udev_selinux_resetfscreatecon(udev);
1605 }
1606 udev_list_init(&sort_list);
1607 add_matching_files(udev, &sort_list, filename, ".rules");
1608
1609 /* read default rules */
1610 add_matching_files(udev, &sort_list, UDEV_PREFIX "/lib/udev/rules.d", ".rules");
1611
1612 /* sort all rules files by basename into list of files */
1613 udev_list_entry_foreach_safe(sort_loop, sort_tmp, udev_list_get_entry(&sort_list)) {
1614 const char *sort_name = udev_list_entry_get_name(sort_loop);
1615 const char *sort_base = strrchr(sort_name, '/');
1616
1617 if (sort_base == NULL)
1618 continue;
1619
1620 udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1621 const char *file_name = udev_list_entry_get_name(file_loop);
1622 const char *file_base = strrchr(file_name, '/');
1623
1624 if (file_base == NULL)
1625 continue;
1626 if (strcmp(file_base, sort_base) == 0) {
1627 info(udev, "rule file basename '%s' already added, ignoring '%s'\n",
1628 file_name, sort_name);
1629 udev_list_entry_remove(sort_loop);
1630 sort_loop = NULL;
1631 break;
1632 }
1633 if (strcmp(file_base, sort_base) > 0)
1634 break;
1635 }
1636 if (sort_loop != NULL)
1637 udev_list_entry_move_before(sort_loop, file_loop);
1638 }
1639 }
1640
1641 /* parse list of files */
1642 udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1643 const char *file_name = udev_list_entry_get_name(file_loop);
1644
1645 if (stat(file_name, &statbuf) == 0 && statbuf.st_size > 0)
1646 parse_file(rules, file_name);
1647 else
1648 info(udev, "can not read '%s'\n", file_name);
1649 udev_list_entry_remove(file_loop);
1650 }
1651
1652 memset(&end_token, 0x00, sizeof(struct token));
1653 end_token.type = TK_END;
1654 add_token(rules, &end_token);
1655
1656 /* link all TK_RULE tokens to be able to fast-forward to next TK_RULE */
1657 prev_rule = 0;
1658 for (i = 1; i < rules->token_cur; i++) {
1659 if (rules->tokens[i].type == TK_RULE) {
1660 rules->tokens[prev_rule].rule.next_rule = i;
1661 prev_rule = i;
1662 }
1663 }
1664
1665 /* shrink allocated token and string buffer */
1666 if (rules->token_cur < rules->token_max) {
1667 struct token *tokens;
1668
1669 tokens = realloc(rules->tokens, rules->token_cur * sizeof(struct token));
1670 if (tokens != NULL || rules->token_cur == 0) {
1671 rules->tokens = tokens;
1672 rules->token_max = rules->token_cur;
1673 }
1674 }
1675 if (rules->buf_cur < rules->buf_max) {
1676 char *buf;
1677
1678 buf = realloc(rules->buf, rules->buf_cur);
1679 if (buf != NULL || rules->buf_cur == 0) {
1680 rules->buf = buf;
1681 rules->buf_max = rules->buf_cur;
1682 }
1683 }
1684 info(udev, "shrunk to %lu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1685 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1686
1687 /* cleanup uid/gid cache */
1688 free(rules->uids);
1689 rules->uids = NULL;
1690 rules->uids_cur = 0;
1691 rules->uids_max = 0;
1692 free(rules->gids);
1693 rules->gids = NULL;
1694 rules->gids_cur = 0;
1695 rules->gids_max = 0;
1696
1697 dump_rules(rules);
1698 return rules;
1699 }
1700
1701 void udev_rules_unref(struct udev_rules *rules)
1702 {
1703 if (rules == NULL)
1704 return;
1705 free(rules->tokens);
1706 free(rules->buf);
1707 free(rules->uids);
1708 free(rules->gids);
1709 free(rules);
1710 }
1711
1712 static int match_key(struct udev_rules *rules, struct token *token, const char *val)
1713 {
1714 char *key_value = &rules->buf[token->key.value_off];
1715 char *pos;
1716 int match = 0;
1717
1718 if (val == NULL)
1719 val = "";
1720
1721 switch (token->key.glob) {
1722 case GL_PLAIN:
1723 match = (strcmp(key_value, val) == 0);
1724 break;
1725 case GL_GLOB:
1726 match = (fnmatch(key_value, val, 0) == 0);
1727 break;
1728 case GL_SPLIT:
1729 {
1730 const char *split;
1731 size_t len;
1732
1733 split = &rules->buf[token->key.value_off];
1734 len = strlen(val);
1735 while (1) {
1736 const char *next;
1737
1738 next = strchr(split, '|');
1739 if (next != NULL) {
1740 size_t matchlen = (size_t)(next - split);
1741
1742 match = (matchlen == len && strncmp(split, val, matchlen) == 0);
1743 if (match)
1744 break;
1745 } else {
1746 match = (strcmp(split, val) == 0);
1747 break;
1748 }
1749 split = &next[1];
1750 }
1751 break;
1752 }
1753 case GL_SPLIT_GLOB:
1754 {
1755 char value[UTIL_PATH_SIZE];
1756
1757 util_strlcpy(value, &rules->buf[token->key.value_off], sizeof(value));
1758 key_value = value;
1759 while (key_value != NULL) {
1760 pos = strchr(key_value, '|');
1761 if (pos != NULL) {
1762 pos[0] = '\0';
1763 pos = &pos[1];
1764 }
1765 dbg(rules->udev, "match %s '%s' <-> '%s'\n", token_str[token->type], key_value, val);
1766 match = (fnmatch(key_value, val, 0) == 0);
1767 if (match)
1768 break;
1769 key_value = pos;
1770 }
1771 break;
1772 }
1773 case GL_SOMETHING:
1774 match = (val[0] != '\0');
1775 break;
1776 case GL_FORMAT:
1777 case GL_UNSET:
1778 return -1;
1779 }
1780
1781 if (match && (token->key.op == OP_MATCH)) {
1782 dbg(rules->udev, "%s is true (matching value)\n", token_str[token->type]);
1783 return 0;
1784 }
1785 if (!match && (token->key.op == OP_NOMATCH)) {
1786 dbg(rules->udev, "%s is true (non-matching value)\n", token_str[token->type]);
1787 return 0;
1788 }
1789 dbg(rules->udev, "%s is not true\n", token_str[token->type]);
1790 return -1;
1791 }
1792
1793 static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur)
1794 {
1795 const char *key_name = &rules->buf[cur->key.attr_off];
1796 const char *key_value = &rules->buf[cur->key.value_off];
1797 char value[UTIL_NAME_SIZE];
1798 size_t len;
1799
1800 value[0] = '\0';
1801 if (key_name[0] == '[') {
1802 char attr[UTIL_PATH_SIZE];
1803
1804 util_strlcpy(attr, key_name, sizeof(attr));
1805 util_resolve_subsys_kernel(event->udev, attr, value, sizeof(value), 1);
1806 }
1807 if (value[0] == '\0') {
1808 const char *val;
1809
1810 val = udev_device_get_sysattr_value(dev, key_name);
1811 if (val != NULL)
1812 util_strlcpy(value, val, sizeof(value));
1813 }
1814 if (value[0] == '\0')
1815 return -1;
1816
1817 /* strip trailing whitespace of value, if not asked to match for it */
1818 len = strlen(key_value);
1819 if (len > 0 && !isspace(key_value[len-1])) {
1820 len = strlen(value);
1821 while (len > 0 && isspace(value[--len]))
1822 value[len] = '\0';
1823 dbg(rules->udev, "removed trailing whitespace from '%s'\n", value);
1824 }
1825 return match_key(rules, cur, value);
1826 }
1827
1828 enum escape_type {
1829 ESCAPE_UNSET,
1830 ESCAPE_NONE,
1831 ESCAPE_REPLACE,
1832 };
1833
1834 int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event)
1835 {
1836 struct token *cur;
1837 struct token *rule;
1838 enum escape_type esc = ESCAPE_UNSET;
1839
1840 if (rules->tokens == NULL)
1841 return -1;
1842
1843 /* loop through token list, match, run actions or forward to next rule */
1844 cur = &rules->tokens[0];
1845 rule = cur;
1846 while (1) {
1847 unsigned int idx;
1848
1849 dump_token(rules, cur);
1850 switch (cur->type) {
1851 case TK_RULE:
1852 /* current rule */
1853 rule = cur;
1854 esc = ESCAPE_UNSET;
1855 break;
1856 case TK_M_ACTION:
1857 if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
1858 goto nomatch;
1859 break;
1860 case TK_M_DEVPATH:
1861 if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
1862 goto nomatch;
1863 break;
1864 case TK_M_KERNEL:
1865 if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
1866 goto nomatch;
1867 break;
1868 case TK_M_DEVLINK:
1869 {
1870 size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
1871 struct udev_list_entry *list_entry;
1872 int match = 0;
1873
1874 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
1875 const char *devlink;
1876
1877 devlink = &udev_list_entry_get_name(list_entry)[devlen];
1878 if (match_key(rules, cur, devlink) == 0) {
1879 match = 1;
1880 break;
1881 }
1882 }
1883 if (!match)
1884 goto nomatch;
1885 break;
1886 }
1887 case TK_M_NAME:
1888 if (match_key(rules, cur, event->name) != 0)
1889 goto nomatch;
1890 break;
1891 case TK_M_ENV:
1892 {
1893 struct udev_list_entry *list_entry;
1894 const char *key_name = &rules->buf[cur->key.attr_off];
1895 const char *value;
1896
1897 list_entry = udev_device_get_properties_list_entry(event->dev);
1898 list_entry = udev_list_entry_get_by_name(list_entry, key_name);
1899 value = udev_list_entry_get_value(list_entry);
1900 if (value == NULL) {
1901 dbg(event->udev, "ENV{%s} is not set, treat as empty\n", key_name);
1902 value = "";
1903 }
1904 if (match_key(rules, cur, value))
1905 goto nomatch;
1906 break;
1907 }
1908 case TK_M_SUBSYSTEM:
1909 if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
1910 goto nomatch;
1911 break;
1912 case TK_M_DRIVER:
1913 if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
1914 goto nomatch;
1915 break;
1916 case TK_M_WAITFOR:
1917 {
1918 char filename[UTIL_PATH_SIZE];
1919 int found;
1920
1921 util_strlcpy(filename, &rules->buf[cur->key.value_off], sizeof(filename));
1922 udev_event_apply_format(event, filename, sizeof(filename));
1923 found = (wait_for_file(event->dev, filename, 10) == 0);
1924 if (!found && (cur->key.op != OP_NOMATCH))
1925 goto nomatch;
1926 break;
1927 }
1928 case TK_M_ATTR:
1929 if (match_attr(rules, event->dev, event, cur) != 0)
1930 goto nomatch;
1931 break;
1932 case TK_M_KERNELS:
1933 case TK_M_SUBSYSTEMS:
1934 case TK_M_DRIVERS:
1935 case TK_M_ATTRS:
1936 {
1937 struct token *next;
1938
1939 /* get whole sequence of parent matches */
1940 next = cur;
1941 while (next->type < TK_M_PARENTS_MAX)
1942 next++;
1943
1944 /* loop over parents */
1945 event->dev_parent = event->dev;
1946 while (1) {
1947 struct token *key;
1948
1949 dbg(event->udev, "parent: '%s'\n", udev_device_get_syspath(event->dev_parent));
1950 /* loop over sequence of parent match keys */
1951 for (key = cur; key < next; key++ ) {
1952 dump_token(rules, key);
1953 switch(key->type) {
1954 case TK_M_KERNELS:
1955 if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
1956 goto try_parent;
1957 break;
1958 case TK_M_SUBSYSTEMS:
1959 if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
1960 goto try_parent;
1961 break;
1962 case TK_M_DRIVERS:
1963 if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
1964 goto try_parent;
1965 break;
1966 case TK_M_ATTRS:
1967 if (match_attr(rules, event->dev_parent, event, key) != 0)
1968 goto try_parent;
1969 break;
1970 default:
1971 goto nomatch;
1972 }
1973 dbg(event->udev, "parent key matched\n");
1974 }
1975 dbg(event->udev, "all parent keys matched\n");
1976 /* all keys matched */
1977 break;
1978
1979 try_parent:
1980 event->dev_parent = udev_device_get_parent(event->dev_parent);
1981 if (event->dev_parent == NULL)
1982 goto nomatch;
1983 }
1984 /* move behind our sequence of parent match keys */
1985 cur = next;
1986 continue;
1987 }
1988 case TK_M_TEST:
1989 {
1990 char filename[UTIL_PATH_SIZE];
1991 struct stat statbuf;
1992 int match;
1993
1994 util_strlcpy(filename, &rules->buf[cur->key.value_off], sizeof(filename));
1995 udev_event_apply_format(event, filename, sizeof(filename));
1996 if (util_resolve_subsys_kernel(event->udev, NULL, filename, sizeof(filename), 0) != 0)
1997 if (filename[0] != '/') {
1998 char tmp[UTIL_PATH_SIZE];
1999
2000 util_strlcpy(tmp, udev_device_get_syspath(event->dev), sizeof(tmp));
2001 util_strlcat(tmp, "/", sizeof(tmp));
2002 util_strlcat(tmp, filename, sizeof(tmp));
2003 util_strlcpy(filename, tmp, sizeof(filename));
2004 }
2005
2006 attr_subst_subdir(filename, sizeof(filename));
2007
2008 match = (stat(filename, &statbuf) == 0);
2009 info(event->udev, "'%s' %s", filename, match ? "exists\n" : "does not exist\n");
2010 if (match && cur->key.mode > 0) {
2011 match = ((statbuf.st_mode & cur->key.mode) > 0);
2012 info(event->udev, "'%s' has mode=%#o and %s %#o\n", filename, statbuf.st_mode,
2013 match ? "matches" : "does not match", cur->key.mode);
2014 }
2015 if (match && cur->key.op == OP_NOMATCH)
2016 goto nomatch;
2017 if (!match && cur->key.op == OP_MATCH)
2018 goto nomatch;
2019 break;
2020 }
2021 case TK_M_PROGRAM:
2022 {
2023 char program[UTIL_PATH_SIZE];
2024 char **envp;
2025 char result[UTIL_PATH_SIZE];
2026
2027 free(event->program_result);
2028 event->program_result = NULL;
2029 util_strlcpy(program, &rules->buf[cur->key.value_off], sizeof(program));
2030 udev_event_apply_format(event, program, sizeof(program));
2031 envp = udev_device_get_properties_envp(event->dev);
2032 if (util_run_program(event->udev, program, envp, result, sizeof(result), NULL) != 0) {
2033 if (cur->key.op != OP_NOMATCH)
2034 goto nomatch;
2035 } else {
2036 int count;
2037
2038 util_remove_trailing_chars(result, '\n');
2039 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2040 count = util_replace_chars(result, ALLOWED_CHARS_INPUT);
2041 if (count > 0)
2042 info(event->udev, "%i character(s) replaced\n" , count);
2043 }
2044 event->program_result = strdup(result);
2045 dbg(event->udev, "storing result '%s'\n", event->program_result);
2046 if (cur->key.op == OP_NOMATCH)
2047 goto nomatch;
2048 }
2049 break;
2050 }
2051 case TK_M_IMPORT_FILE:
2052 {
2053 char import[UTIL_PATH_SIZE];
2054
2055 util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));
2056 udev_event_apply_format(event, import, sizeof(import));
2057 if (import_file_into_properties(event->dev, import) != 0)
2058 if (cur->key.op != OP_NOMATCH)
2059 goto nomatch;
2060 break;
2061 }
2062 case TK_M_IMPORT_PROG:
2063 {
2064 char import[UTIL_PATH_SIZE];
2065
2066 util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));
2067 udev_event_apply_format(event, import, sizeof(import));
2068 if (import_program_into_properties(event->dev, import) != 0)
2069 if (cur->key.op != OP_NOMATCH)
2070 goto nomatch;
2071 break;
2072 }
2073 case TK_M_IMPORT_PARENT:
2074 {
2075 char import[UTIL_PATH_SIZE];
2076
2077 util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));
2078 udev_event_apply_format(event, import, sizeof(import));
2079 if (import_parent_into_properties(event->dev, import) != 0)
2080 if (cur->key.op != OP_NOMATCH)
2081 goto nomatch;
2082 break;
2083 }
2084 case TK_M_RESULT:
2085 if (match_key(rules, cur, event->program_result) != 0)
2086 goto nomatch;
2087 break;
2088
2089 case TK_A_IGNORE_DEVICE:
2090 event->ignore_device = 1;
2091 return 0;
2092 break;
2093 case TK_A_STRING_ESCAPE_NONE:
2094 esc = ESCAPE_NONE;
2095 break;
2096 case TK_A_STRING_ESCAPE_REPLACE:
2097 esc = ESCAPE_REPLACE;
2098 break;
2099 case TK_A_NUM_FAKE_PART:
2100 if (strcmp(udev_device_get_subsystem(event->dev), "block") != 0)
2101 break;
2102 if (udev_device_get_sysnum(event->dev) != NULL)
2103 break;
2104 udev_device_set_num_fake_partitions(event->dev, cur->key.num_fake_part);
2105 break;
2106 case TK_A_DEVLINK_PRIO:
2107 udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
2108 break;
2109 case TK_A_OWNER:
2110 {
2111 char owner[UTIL_NAME_SIZE];
2112
2113 if (event->owner_final)
2114 break;
2115 if (cur->key.op == OP_ASSIGN_FINAL)
2116 event->owner_final = 1;
2117 util_strlcpy(owner, &rules->buf[cur->key.value_off], sizeof(owner));
2118 udev_event_apply_format(event, owner, sizeof(owner));
2119 event->uid = util_lookup_user(event->udev, owner);
2120 break;
2121 }
2122 case TK_A_GROUP:
2123 {
2124 char group[UTIL_NAME_SIZE];
2125
2126 if (event->group_final)
2127 break;
2128 if (cur->key.op == OP_ASSIGN_FINAL)
2129 event->group_final = 1;
2130 util_strlcpy(group, &rules->buf[cur->key.value_off], sizeof(group));
2131 udev_event_apply_format(event, group, sizeof(group));
2132 event->gid = util_lookup_group(event->udev, group);
2133 break;
2134 }
2135 case TK_A_MODE:
2136 {
2137 char mode[UTIL_NAME_SIZE];
2138 char *endptr;
2139
2140 if (event->mode_final)
2141 break;
2142 if (cur->key.op == OP_ASSIGN_FINAL)
2143 event->mode_final = 1;
2144 util_strlcpy(mode, &rules->buf[cur->key.value_off], sizeof(mode));
2145 udev_event_apply_format(event, mode, sizeof(mode));
2146 event->mode = strtol(mode, &endptr, 8);
2147 if (endptr[0] != '\0') {
2148 err(event->udev, "invalide mode '%s' set default mode 0660\n", mode);
2149 event->mode = 0660;
2150 }
2151 break;
2152 }
2153 case TK_A_OWNER_ID:
2154 if (event->owner_final)
2155 break;
2156 if (cur->key.op == OP_ASSIGN_FINAL)
2157 event->owner_final = 1;
2158 event->uid = cur->key.uid;
2159 break;
2160 case TK_A_GROUP_ID:
2161 if (event->group_final)
2162 break;
2163 if (cur->key.op == OP_ASSIGN_FINAL)
2164 event->group_final = 1;
2165 event->gid = cur->key.gid;
2166 break;
2167 case TK_A_MODE_ID:
2168 if (event->mode_final)
2169 break;
2170 if (cur->key.op == OP_ASSIGN_FINAL)
2171 event->mode_final = 1;
2172 event->mode = cur->key.mode;
2173 break;
2174 case TK_A_ENV:
2175 {
2176 const char *name = &rules->buf[cur->key.attr_off];
2177 char *value = &rules->buf[cur->key.value_off];
2178
2179 if (value[0] != '\0') {
2180 char temp_value[UTIL_NAME_SIZE];
2181 struct udev_list_entry *entry;
2182
2183 util_strlcpy(temp_value, value, sizeof(temp_value));
2184 udev_event_apply_format(event, temp_value, sizeof(temp_value));
2185 entry = udev_device_add_property(event->dev, name, temp_value);
2186 /* store in db */
2187 udev_list_entry_set_flag(entry, 1);
2188 } else {
2189 udev_device_add_property(event->dev, name, NULL);
2190 }
2191 break;
2192 }
2193 case TK_A_NAME:
2194 {
2195 const char *name = &rules->buf[cur->key.value_off];
2196 char name_str[UTIL_PATH_SIZE];
2197 int count;
2198
2199 if (event->name_final)
2200 break;
2201 if (cur->key.op == OP_ASSIGN_FINAL)
2202 event->name_final = 1;
2203 if (name[0] == '\0') {
2204 free(event->name);
2205 event->name = NULL;
2206 break;
2207 }
2208 util_strlcpy(name_str, name, sizeof(name_str));
2209 udev_event_apply_format(event, name_str, sizeof(name_str));
2210 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2211 count = util_replace_chars(name_str, ALLOWED_CHARS_FILE);
2212 if (count > 0)
2213 info(event->udev, "%i character(s) replaced\n", count);
2214 free(event->name);
2215 event->name = strdup(name_str);
2216 }
2217 break;
2218 }
2219 case TK_A_DEVLINK:
2220 {
2221 char temp[UTIL_PATH_SIZE];
2222 char filename[UTIL_PATH_SIZE];
2223 char *pos, *next;
2224 int count = 0;
2225
2226 if (event->devlink_final)
2227 break;
2228 if (major(udev_device_get_devnum(event->dev)) == 0)
2229 break;
2230 if (cur->key.op == OP_ASSIGN_FINAL)
2231 event->devlink_final = 1;
2232 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2233 udev_device_cleanup_devlinks_list(event->dev);
2234
2235 /* allow multiple symlinks separated by spaces */
2236 util_strlcpy(temp, &rules->buf[cur->key.value_off], sizeof(temp));
2237 udev_event_apply_format(event, temp, sizeof(temp));
2238 if (esc == ESCAPE_UNSET)
2239 count = util_replace_chars(temp, ALLOWED_CHARS_FILE " ");
2240 else if (esc == ESCAPE_REPLACE)
2241 count = util_replace_chars(temp, ALLOWED_CHARS_FILE);
2242 if (count > 0)
2243 info(event->udev, "%i character(s) replaced\n" , count);
2244 dbg(event->udev, "rule applied, added symlink(s) '%s'\n", temp);
2245 pos = temp;
2246 while (isspace(pos[0]))
2247 pos++;
2248 next = strchr(pos, ' ');
2249 while (next) {
2250 next[0] = '\0';
2251 info(event->udev, "add symlink '%s'\n", pos);
2252 util_strlcpy(filename, udev_get_dev_path(event->udev), sizeof(filename));
2253 util_strlcat(filename, "/", sizeof(filename));
2254 util_strlcat(filename, pos, sizeof(filename));
2255 udev_device_add_devlink(event->dev, filename);
2256 while (isspace(next[1]))
2257 next++;
2258 pos = &next[1];
2259 next = strchr(pos, ' ');
2260 }
2261 if (pos[0] != '\0') {
2262 info(event->udev, "add symlink '%s'\n", pos);
2263 util_strlcpy(filename, udev_get_dev_path(event->udev), sizeof(filename));
2264 util_strlcat(filename, "/", sizeof(filename));
2265 util_strlcat(filename, pos, sizeof(filename));
2266 udev_device_add_devlink(event->dev, filename);
2267 }
2268 }
2269 break;
2270 case TK_A_EVENT_TIMEOUT:
2271 udev_device_set_event_timeout(event->dev, cur->key.event_timeout);
2272 break;
2273 case TK_A_IGNORE_REMOVE:
2274 udev_device_set_ignore_remove(event->dev, 1);
2275 break;
2276 case TK_A_ATTR:
2277 {
2278 const char *key_name = &rules->buf[cur->key.attr_off];
2279 char attr[UTIL_PATH_SIZE];
2280 char value[UTIL_NAME_SIZE];
2281 FILE *f;
2282
2283 util_strlcpy(attr, key_name, sizeof(attr));
2284 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0) {
2285 util_strlcpy(attr, udev_device_get_syspath(event->dev), sizeof(attr));
2286 util_strlcat(attr, "/", sizeof(attr));
2287 util_strlcat(attr, key_name, sizeof(attr));
2288 }
2289
2290 attr_subst_subdir(attr, sizeof(attr));
2291
2292 util_strlcpy(value, &rules->buf[cur->key.value_off], sizeof(value));
2293 udev_event_apply_format(event, value, sizeof(value));
2294 info(event->udev, "writing '%s' to sysfs file '%s'\n", value, attr);
2295 f = fopen(attr, "w");
2296 if (f != NULL) {
2297 if (!event->test)
2298 if (fprintf(f, "%s", value) <= 0)
2299 err(event->udev, "error writing ATTR{%s}: %m\n", attr);
2300 fclose(f);
2301 } else {
2302 err(event->udev, "error opening ATTR{%s} for writing: %m\n", attr);
2303 }
2304 break;
2305 }
2306 case TK_A_RUN:
2307 {
2308 struct udev_list_entry *list_entry;
2309
2310 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2311 udev_list_cleanup_entries(event->udev, &event->run_list);
2312 list_entry = udev_list_entry_add(event->udev, &event->run_list,
2313 &rules->buf[cur->key.value_off], NULL, 1, 0);
2314 if (cur->key.ignore_error)
2315 udev_list_entry_set_flag(list_entry, 1);
2316 break;
2317 }
2318 case TK_A_GOTO:
2319 cur = &rules->tokens[cur->key.rule_goto];
2320 continue;
2321 case TK_A_LAST_RULE:
2322 case TK_END:
2323 break;
2324
2325 case TK_M_PARENTS_MAX:
2326 case TK_M_MAX:
2327 case TK_UNSET:
2328 err(rules->udev, "wrong type %u\n", cur->type);
2329 goto nomatch;
2330 }
2331
2332 cur++;
2333 continue;
2334 nomatch:
2335 /* fast-forward to next rule */
2336 idx = rule->rule.next_rule;
2337 if (idx == 0)
2338 break;
2339 dbg(rules->udev, "forward to rule: %u\n", idx);
2340 cur = &rules->tokens[idx];
2341 }
2342 return 0;
2343 }
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