2 * Copyright (C) 2008 Kay Sievers <kay.sievers@vrfy.org>
3 * Copyright (C) 2008 Alan Jenkins <alan-jenkins@tuffmail.co.uk>
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
33 #define PREALLOC_TOKEN 2048
34 #define PREALLOC_STRBUF 32 * 1024
35 #define PREALLOC_TRIE 256
38 unsigned int name_off;
46 /* this node's first child */
47 unsigned int child_idx;
48 /* the next child of our parent node's child list */
49 unsigned int next_child_idx;
50 /* this node's last child (shortcut for append) */
51 unsigned int last_child_idx;
52 unsigned int value_off;
53 unsigned short value_len;
61 /* every key in the rules file becomes a token */
63 unsigned int token_cur;
64 unsigned int token_max;
66 /* all key strings are copied to a single string buffer */
70 unsigned int buf_count;
72 /* during rule parsing, strings are indexed to find duplicates */
73 struct trie_node *trie_nodes;
74 unsigned int trie_nodes_cur;
75 unsigned int trie_nodes_max;
77 /* during rule parsing, uid/gid lookup results are cached */
79 unsigned int uids_cur;
80 unsigned int uids_max;
82 unsigned int gids_cur;
83 unsigned int gids_max;
86 /* KEY=="", KEY!="", KEY+="", KEY="", KEY:="" */
99 enum string_glob_type {
101 GL_PLAIN, /* no special chars */
102 GL_GLOB, /* shell globs ?,*,[] */
103 GL_SPLIT, /* multi-value A|B */
104 GL_SPLIT_GLOB, /* multi-value with glob A*|B* */
105 GL_SOMETHING, /* commonly used "?*" */
109 /* tokens of a rule are sorted/handled in this order */
114 TK_M_ACTION, /* val */
115 TK_M_DEVPATH, /* val */
116 TK_M_KERNEL, /* val */
117 TK_M_DEVLINK, /* val */
119 TK_M_ENV, /* val, attr */
120 TK_M_SUBSYSTEM, /* val */
121 TK_M_DRIVER, /* val */
122 TK_M_WAITFOR, /* val */
123 TK_M_ATTR, /* val, attr */
126 TK_M_KERNELS, /* val */
127 TK_M_SUBSYSTEMS, /* val */
128 TK_M_DRIVERS, /* val */
129 TK_M_ATTRS, /* val, attr */
132 TK_M_TEST, /* val, mode_t */
133 TK_M_PROGRAM, /* val */
134 TK_M_IMPORT_FILE, /* val */
135 TK_M_IMPORT_PROG, /* val */
136 TK_M_IMPORT_PARENT, /* val */
137 TK_M_RESULT, /* val */
141 TK_A_STRING_ESCAPE_NONE,
142 TK_A_STRING_ESCAPE_REPLACE,
143 TK_A_INOTIFY_WATCH, /* int */
144 TK_A_NUM_FAKE_PART, /* int */
145 TK_A_DEVLINK_PRIO, /* int */
146 TK_A_OWNER, /* val */
147 TK_A_GROUP, /* val */
149 TK_A_OWNER_ID, /* uid_t */
150 TK_A_GROUP_ID, /* gid_t */
151 TK_A_MODE_ID, /* mode_t */
152 TK_A_ENV, /* val, attr */
154 TK_A_DEVLINK, /* val */
155 TK_A_EVENT_TIMEOUT, /* int */
157 TK_A_ATTR, /* val, attr */
158 TK_A_RUN, /* val, bool */
159 TK_A_GOTO, /* size_t */
165 /* we try to pack stuff in a way that we take only 12 bytes per token */
168 unsigned char type; /* same as in rule and key */
172 unsigned short token_count;
173 unsigned int label_off;
174 unsigned short filename_off;
175 unsigned short filename_line;
182 unsigned int value_off;
184 unsigned int attr_off;
186 unsigned int rule_goto;
201 struct udev_rules *rules;
203 struct token token[MAX_TK];
204 unsigned int token_cur;
208 static const char *operation_str(enum operation_type type)
210 static const char *operation_strs[] = {
211 [OP_UNSET] = "UNSET",
212 [OP_MATCH] = "match",
213 [OP_NOMATCH] = "nomatch",
214 [OP_MATCH_MAX] = "MATCH_MAX",
217 [OP_ASSIGN] = "assign",
218 [OP_ASSIGN_FINAL] = "assign-final",
221 return operation_strs[type];
224 static const char *string_glob_str(enum string_glob_type type)
226 static const char *string_glob_strs[] = {
227 [GL_UNSET] = "UNSET",
228 [GL_PLAIN] = "plain",
230 [GL_SPLIT] = "split",
231 [GL_SPLIT_GLOB] = "split-glob",
232 [GL_SOMETHING] = "split-glob",
233 [GL_FORMAT] = "format",
236 return string_glob_strs[type];
239 static const char *token_str(enum token_type type)
241 static const char *token_strs[] = {
242 [TK_UNSET] = "UNSET",
245 [TK_M_ACTION] = "M ACTION",
246 [TK_M_DEVPATH] = "M DEVPATH",
247 [TK_M_KERNEL] = "M KERNEL",
248 [TK_M_DEVLINK] = "M DEVLINK",
249 [TK_M_NAME] = "M NAME",
250 [TK_M_ENV] = "M ENV",
251 [TK_M_SUBSYSTEM] = "M SUBSYSTEM",
252 [TK_M_DRIVER] = "M DRIVER",
253 [TK_M_WAITFOR] = "M WAITFOR",
254 [TK_M_ATTR] = "M ATTR",
256 [TK_M_PARENTS_MIN] = "M PARENTS_MIN",
257 [TK_M_KERNELS] = "M KERNELS",
258 [TK_M_SUBSYSTEMS] = "M SUBSYSTEMS",
259 [TK_M_DRIVERS] = "M DRIVERS",
260 [TK_M_ATTRS] = "M ATTRS",
261 [TK_M_PARENTS_MAX] = "M PARENTS_MAX",
263 [TK_M_TEST] = "M TEST",
264 [TK_M_PROGRAM] = "M PROGRAM",
265 [TK_M_IMPORT_FILE] = "M IMPORT_FILE",
266 [TK_M_IMPORT_PROG] = "M IMPORT_PROG",
267 [TK_M_IMPORT_PARENT] = "M MPORT_PARENT",
268 [TK_M_RESULT] = "M RESULT",
269 [TK_M_MAX] = "M MAX",
271 [TK_A_IGNORE_DEVICE] = "A IGNORE_DEVICE",
272 [TK_A_STRING_ESCAPE_NONE] = "A STRING_ESCAPE_NONE",
273 [TK_A_STRING_ESCAPE_REPLACE] = "A STRING_ESCAPE_REPLACE",
274 [TK_A_INOTIFY_WATCH] = "A INOTIFY_WATCH",
275 [TK_A_NUM_FAKE_PART] = "A NUM_FAKE_PART",
276 [TK_A_DEVLINK_PRIO] = "A DEVLINK_PRIO",
277 [TK_A_OWNER] = "A OWNER",
278 [TK_A_GROUP] = "A GROUP",
279 [TK_A_MODE] = "A MODE",
280 [TK_A_OWNER_ID] = "A OWNER_ID",
281 [TK_A_GROUP_ID] = "A GROUP_ID",
282 [TK_A_MODE_ID] = "A MODE_ID",
283 [TK_A_ENV] = "A ENV",
284 [TK_A_NAME] = "A NAME",
285 [TK_A_DEVLINK] = "A DEVLINK",
286 [TK_A_EVENT_TIMEOUT] = "A EVENT_TIMEOUT",
287 [TK_A_IGNORE_REMOVE] = "A IGNORE_REMOVE",
288 [TK_A_ATTR] = "A ATTR",
289 [TK_A_RUN] = "A RUN",
290 [TK_A_GOTO] = "A GOTO",
291 [TK_A_LAST_RULE] = "A LAST_RULE",
296 return token_strs[type];
299 static void dump_token(struct udev_rules *rules, struct token *token)
301 enum token_type type = token->type;
302 enum operation_type op = token->key.op;
303 enum string_glob_type glob = token->key.glob;
304 const char *value = &rules->buf[token->key.value_off];
305 const char *attr = &rules->buf[token->key.attr_off];
310 const char *tks_ptr = (char *)rules->tokens;
311 const char *tk_ptr = (char *)token;
312 unsigned int idx = (tk_ptr - tks_ptr) / sizeof(struct token);
314 dbg(rules->udev, "* RULE %s:%u, token: %u, count: %u, label: '%s', flags: 0x%02x\n",
315 &rules->buf[token->rule.filename_off], token->rule.filename_line,
316 idx, token->rule.token_count,
317 &rules->buf[token->rule.label_off],
330 case TK_M_SUBSYSTEMS:
333 case TK_M_IMPORT_FILE:
334 case TK_M_IMPORT_PROG:
335 case TK_M_IMPORT_PARENT:
343 dbg(rules->udev, "%s %s '%s'(%s)\n",
344 token_str(type), operation_str(op), value, string_glob_str(glob));
351 dbg(rules->udev, "%s %s '%s' '%s'(%s)\n",
352 token_str(type), operation_str(op), attr, value, string_glob_str(glob));
354 case TK_A_IGNORE_DEVICE:
355 case TK_A_STRING_ESCAPE_NONE:
356 case TK_A_STRING_ESCAPE_REPLACE:
358 case TK_A_IGNORE_REMOVE:
359 dbg(rules->udev, "%s\n", token_str(type));
362 dbg(rules->udev, "%s %s '%s'(%s) %#o\n",
363 token_str(type), operation_str(op), value, string_glob_str(glob), token->key.mode);
365 case TK_A_INOTIFY_WATCH:
366 dbg(rules->udev, "%s %u\n", token_str(type), token->key.watch);
368 case TK_A_NUM_FAKE_PART:
369 dbg(rules->udev, "%s %u\n", token_str(type), token->key.num_fake_part);
371 case TK_A_DEVLINK_PRIO:
372 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.devlink_prio);
375 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.uid);
378 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.gid);
381 dbg(rules->udev, "%s %s %#o\n", token_str(type), operation_str(op), token->key.mode);
383 case TK_A_EVENT_TIMEOUT:
384 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.event_timeout);
387 dbg(rules->udev, "%s '%s' %u\n", token_str(type), value, token->key.rule_goto);
390 dbg(rules->udev, "* %s\n", token_str(type));
392 case TK_M_PARENTS_MIN:
393 case TK_M_PARENTS_MAX:
396 dbg(rules->udev, "unknown type %u\n", type);
401 static void dump_rules(struct udev_rules *rules)
405 dbg(rules->udev, "dumping %u (%zu bytes) tokens, %u (%zu bytes) strings\n",
407 rules->token_cur * sizeof(struct token),
410 for(i = 0; i < rules->token_cur; i++)
411 dump_token(rules, &rules->tokens[i]);
414 static inline const char *operation_str(enum operation_type type) { return NULL; }
415 static inline const char *token_str(enum token_type type) { return NULL; }
416 static inline void dump_token(struct udev_rules *rules, struct token *token) {}
417 static inline void dump_rules(struct udev_rules *rules) {}
420 static int add_new_string(struct udev_rules *rules, const char *str, size_t bytes)
424 /* grow buffer if needed */
425 if (rules->buf_cur + bytes+1 >= rules->buf_max) {
429 /* double the buffer size */
430 add = rules->buf_max;
434 buf = realloc(rules->buf, rules->buf_max + add);
437 dbg(rules->udev, "extend buffer from %zu to %zu\n", rules->buf_max, rules->buf_max + add);
439 rules->buf_max += add;
441 off = rules->buf_cur;
442 memcpy(&rules->buf[rules->buf_cur], str, bytes);
443 rules->buf_cur += bytes;
448 static int add_string(struct udev_rules *rules, const char *str)
450 unsigned int node_idx;
451 struct trie_node *new_node;
452 unsigned int new_node_idx;
457 struct trie_node *parent;
459 /* walk trie, start from last character of str to find matching tails */
463 for (depth = 0; depth <= len; depth++) {
464 struct trie_node *node;
465 unsigned int child_idx;
467 node = &rules->trie_nodes[node_idx];
468 off = node->value_off + node->value_len - len;
470 /* match against current node */
471 if (depth == len || (node->value_len >= len && memcmp(&rules->buf[off], str, len) == 0))
474 /* lookup child node */
475 key = str[len - 1 - depth];
476 child_idx = node->child_idx;
477 while (child_idx > 0) {
478 struct trie_node *child;
480 child = &rules->trie_nodes[child_idx];
481 if (child->key == key)
483 child_idx = child->next_child_idx;
487 node_idx = child_idx;
490 /* string not found, add it */
491 off = add_new_string(rules, str, len + 1);
493 /* grow trie nodes if needed */
494 if (rules->trie_nodes_cur >= rules->trie_nodes_max) {
495 struct trie_node *nodes;
498 /* double the buffer size */
499 add = rules->trie_nodes_max;
503 nodes = realloc(rules->trie_nodes, (rules->trie_nodes_max + add) * sizeof(struct trie_node));
506 dbg(rules->udev, "extend trie nodes from %u to %u\n",
507 rules->trie_nodes_max, rules->trie_nodes_max + add);
508 rules->trie_nodes = nodes;
509 rules->trie_nodes_max += add;
513 new_node_idx = rules->trie_nodes_cur;
514 rules->trie_nodes_cur++;
515 new_node = &rules->trie_nodes[new_node_idx];
516 memset(new_node, 0x00, sizeof(struct trie_node));
517 new_node->value_off = off;
518 new_node->value_len = len;
521 /* join the parent's child list */
522 parent = &rules->trie_nodes[node_idx];
523 if (parent->child_idx == 0) {
524 parent->child_idx = new_node_idx;
526 struct trie_node *last_child;
528 last_child = &rules->trie_nodes[parent->last_child_idx];
529 last_child->next_child_idx = new_node_idx;
531 parent->last_child_idx = new_node_idx;
535 static int add_token(struct udev_rules *rules, struct token *token)
537 /* grow buffer if needed */
538 if (rules->token_cur+1 >= rules->token_max) {
539 struct token *tokens;
542 /* double the buffer size */
543 add = rules->token_max;
547 tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
550 dbg(rules->udev, "extend tokens from %u to %u\n", rules->token_max, rules->token_max + add);
551 rules->tokens = tokens;
552 rules->token_max += add;
554 memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
559 static uid_t add_uid(struct udev_rules *rules, const char *owner)
565 /* lookup, if we know it already */
566 for (i = 0; i < rules->uids_cur; i++) {
567 off = rules->uids[i].name_off;
568 if (strcmp(&rules->buf[off], owner) == 0) {
569 uid = rules->uids[i].uid;
570 dbg(rules->udev, "return existing %u for '%s'\n", uid, owner);
574 uid = util_lookup_user(rules->udev, owner);
576 /* grow buffer if needed */
577 if (rules->uids_cur+1 >= rules->uids_max) {
578 struct uid_gid *uids;
581 /* double the buffer size */
582 add = rules->uids_max;
586 uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
589 dbg(rules->udev, "extend uids from %u to %u\n", rules->uids_max, rules->uids_max + add);
591 rules->uids_max += add;
593 rules->uids[rules->uids_cur].uid = uid;
594 off = add_string(rules, owner);
597 rules->uids[rules->uids_cur].name_off = off;
602 static gid_t add_gid(struct udev_rules *rules, const char *group)
608 /* lookup, if we know it already */
609 for (i = 0; i < rules->gids_cur; i++) {
610 off = rules->gids[i].name_off;
611 if (strcmp(&rules->buf[off], group) == 0) {
612 gid = rules->gids[i].gid;
613 dbg(rules->udev, "return existing %u for '%s'\n", gid, group);
617 gid = util_lookup_group(rules->udev, group);
619 /* grow buffer if needed */
620 if (rules->gids_cur+1 >= rules->gids_max) {
621 struct uid_gid *gids;
624 /* double the buffer size */
625 add = rules->gids_max;
629 gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid));
632 dbg(rules->udev, "extend gids from %u to %u\n", rules->gids_max, rules->gids_max + add);
634 rules->gids_max += add;
636 rules->gids[rules->gids_cur].gid = gid;
637 off = add_string(rules, group);
640 rules->gids[rules->gids_cur].name_off = off;
645 static int import_property_from_string(struct udev_device *dev, char *line)
647 struct udev *udev = udev_device_get_udev(dev);
654 while (isspace(key[0]))
657 /* comment or empty line */
658 if (key[0] == '#' || key[0] == '\0')
661 /* split key/value */
662 val = strchr(key, '=');
669 while (isspace(val[0]))
676 while (isspace(key[len-1]))
680 /* terminate value */
684 while (isspace(val[len-1]))
692 if (val[0] == '"' || val[0] == '\'') {
693 if (val[len-1] != val[0]) {
694 info(udev, "inconsistent quoting: '%s', skip\n", line);
701 dbg(udev, "adding '%s'='%s'\n", key, val);
703 /* handle device, renamed by external tool, returning new path */
704 if (strcmp(key, "DEVPATH") == 0) {
705 char syspath[UTIL_PATH_SIZE];
707 info(udev, "updating devpath from '%s' to '%s'\n",
708 udev_device_get_devpath(dev), val);
709 util_strscpyl(syspath, sizeof(syspath), udev_get_sys_path(udev), val, NULL);
710 udev_device_set_syspath(dev, syspath);
712 struct udev_list_entry *entry;
714 entry = udev_device_add_property(dev, key, val);
716 udev_list_entry_set_flag(entry, 1);
721 static int import_file_into_properties(struct udev_device *dev, const char *filename)
724 char line[UTIL_LINE_SIZE];
726 f = fopen(filename, "r");
729 while (fgets(line, sizeof(line), f) != NULL)
730 import_property_from_string(dev, line);
735 static int import_program_into_properties(struct udev_device *dev, const char *program)
737 struct udev *udev = udev_device_get_udev(dev);
743 envp = udev_device_get_properties_envp(dev);
744 if (util_run_program(udev, program, envp, result, sizeof(result), &reslen) != 0)
748 while (line != NULL) {
751 pos = strchr(line, '\n');
756 import_property_from_string(dev, line);
762 static int import_parent_into_properties(struct udev_device *dev, const char *filter)
764 struct udev *udev = udev_device_get_udev(dev);
765 struct udev_device *dev_parent;
766 struct udev_list_entry *list_entry;
768 dev_parent = udev_device_get_parent(dev);
769 if (dev_parent == NULL)
772 dbg(udev, "found parent '%s', get the node name\n", udev_device_get_syspath(dev_parent));
773 udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
774 const char *key = udev_list_entry_get_name(list_entry);
775 const char *val = udev_list_entry_get_value(list_entry);
777 if (fnmatch(filter, key, 0) == 0) {
778 struct udev_list_entry *entry;
780 dbg(udev, "import key '%s=%s'\n", key, val);
781 entry = udev_device_add_property(dev, key, val);
783 udev_list_entry_set_flag(entry, 1);
789 #define WAIT_LOOP_PER_SECOND 50
790 static int wait_for_file(struct udev_device *dev, const char *file, int timeout)
792 struct udev *udev = udev_device_get_udev(dev);
793 char filepath[UTIL_PATH_SIZE];
794 char devicepath[UTIL_PATH_SIZE];
796 int loop = timeout * WAIT_LOOP_PER_SECOND;
798 /* a relative path is a device attribute */
799 devicepath[0] = '\0';
800 if (file[0] != '/') {
801 util_strscpyl(devicepath, sizeof(devicepath),
802 udev_get_sys_path(udev), udev_device_get_devpath(dev), NULL);
803 util_strscpyl(filepath, sizeof(filepath), devicepath, "/", file, NULL);
807 dbg(udev, "will wait %i sec for '%s'\n", timeout, file);
810 if (stat(file, &stats) == 0) {
811 info(udev, "file '%s' appeared after %i loops\n", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
814 /* make sure, the device did not disappear in the meantime */
815 if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
816 info(udev, "device disappeared while waiting for '%s'\n", file);
819 info(udev, "wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND);
820 usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND);
822 info(udev, "waiting for '%s' failed\n", file);
826 static int attr_subst_subdir(char *attr, size_t len)
830 if (strstr(attr, "/*/")) {
832 char dirname[UTIL_PATH_SIZE];
836 util_strscpy(dirname, sizeof(dirname), attr);
837 pos = strstr(dirname, "/*/");
842 dir = opendir(dirname);
846 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
849 if (dent->d_name[0] == '.')
851 util_strscpyl(attr, len, dirname, "/", dent->d_name, tail, NULL);
852 if (stat(attr, &stats) == 0) {
864 static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value)
870 if (linepos == NULL && linepos[0] == '\0')
873 /* skip whitespace */
874 while (isspace(linepos[0]) || linepos[0] == ',')
878 if (linepos[0] == '\0')
884 if (linepos[0] == '\0')
886 if (isspace(linepos[0]))
888 if (linepos[0] == '=')
890 if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
891 if (linepos[1] == '=')
895 /* remember end of key */
898 /* skip whitespace after key */
899 while (isspace(linepos[0]))
901 if (linepos[0] == '\0')
904 /* get operation type */
905 if (linepos[0] == '=' && linepos[1] == '=') {
908 } else if (linepos[0] == '!' && linepos[1] == '=') {
911 } else if (linepos[0] == '+' && linepos[1] == '=') {
914 } else if (linepos[0] == '=') {
917 } else if (linepos[0] == ':' && linepos[1] == '=') {
918 *op = OP_ASSIGN_FINAL;
926 /* skip whitespace after operator */
927 while (isspace(linepos[0]))
929 if (linepos[0] == '\0')
933 if (linepos[0] == '"')
940 temp = strchr(linepos, '"');
945 dbg(udev, "%s '%s'-'%s'\n", operation_str(*op), *key, *value);
947 /* move line to next key */
952 /* extract possible KEY{attr} */
953 static char *get_key_attribute(struct udev *udev, char *str)
958 attr = strchr(str, '{');
961 pos = strchr(attr, '}');
963 err(udev, "missing closing brace for format\n");
967 dbg(udev, "attribute='%s'\n", attr);
973 static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
974 enum operation_type op,
975 const char *value, const void *data)
977 struct token *token = &rule_tmp->token[rule_tmp->token_cur];
978 const char *attr = data;
979 enum string_glob_type glob;
981 memset(token, 0x00, sizeof(struct token));
993 case TK_M_SUBSYSTEMS:
996 case TK_M_IMPORT_FILE:
997 case TK_M_IMPORT_PROG:
998 case TK_M_IMPORT_PARENT:
1006 token->key.value_off = add_string(rule_tmp->rules, value);
1013 token->key.value_off = add_string(rule_tmp->rules, value);
1014 token->key.attr_off = add_string(rule_tmp->rules, attr);
1017 token->key.value_off = add_string(rule_tmp->rules, value);
1019 token->key.mode = *(mode_t *)data;
1021 case TK_A_IGNORE_DEVICE:
1022 case TK_A_STRING_ESCAPE_NONE:
1023 case TK_A_STRING_ESCAPE_REPLACE:
1024 case TK_A_IGNORE_REMOVE:
1025 case TK_A_LAST_RULE:
1028 token->key.value_off = add_string(rule_tmp->rules, value);
1029 token->key.ignore_error = *(int *)data;
1031 case TK_A_INOTIFY_WATCH:
1032 case TK_A_NUM_FAKE_PART:
1033 case TK_A_DEVLINK_PRIO:
1034 token->key.devlink_prio = *(int *)data;
1037 token->key.uid = *(uid_t *)data;
1040 token->key.gid = *(gid_t *)data;
1043 token->key.mode = *(mode_t *)data;
1045 case TK_A_EVENT_TIMEOUT:
1046 token->key.event_timeout = *(int *)data;
1049 case TK_M_PARENTS_MIN:
1050 case TK_M_PARENTS_MAX:
1054 err(rule_tmp->rules->udev, "wrong type %u\n", type);
1059 if (value != NULL) {
1060 if (type < TK_M_MAX) {
1061 /* check if we need to split or call fnmatch() while matching rules */
1065 has_split = (strchr(value, '|') != NULL);
1066 has_glob = (strchr(value, '*') != NULL || strchr(value, '?') != NULL ||
1067 strchr(value, '[') != NULL || strchr(value, ']') != NULL);
1068 if (has_split && has_glob) {
1069 glob = GL_SPLIT_GLOB;
1070 } else if (has_split) {
1072 } else if (has_glob) {
1073 if (strcmp(value, "?*") == 0)
1074 glob = GL_SOMETHING;
1079 /* check if we need to substitute format strings for matching rules */
1080 if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
1085 token->key.type = type;
1087 token->key.glob = glob;
1088 rule_tmp->token_cur++;
1089 if (rule_tmp->token_cur >= ARRAY_SIZE(rule_tmp->token)) {
1090 err(rule_tmp->rules->udev, "temporary rule array too small\n");
1096 static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp)
1099 unsigned int start = 0;
1100 unsigned int end = rule_tmp->token_cur;
1102 for (i = 0; i < rule_tmp->token_cur; i++) {
1103 enum token_type next_val = TK_UNSET;
1104 unsigned int next_idx;
1107 /* find smallest value */
1108 for (j = start; j < end; j++) {
1109 if (rule_tmp->token[j].type == TK_UNSET)
1111 if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
1112 next_val = rule_tmp->token[j].type;
1117 /* add token and mark done */
1118 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
1120 rule_tmp->token[next_idx].type = TK_UNSET;
1123 if (next_idx == start)
1125 if (next_idx+1 == end)
1131 static int add_rule(struct udev_rules *rules, char *line,
1132 const char *filename, unsigned int filename_off, unsigned int lineno)
1136 struct rule_tmp rule_tmp;
1138 memset(&rule_tmp, 0x00, sizeof(struct rule_tmp));
1139 rule_tmp.rules = rules;
1140 rule_tmp.rule.type = TK_RULE;
1141 rule_tmp.rule.rule.filename_off = filename_off;
1142 rule_tmp.rule.rule.filename_line = lineno;
1148 enum operation_type op;
1150 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0)
1153 if (strcasecmp(key, "ACTION") == 0) {
1154 if (op > OP_MATCH_MAX) {
1155 err(rules->udev, "invalid ACTION operation\n");
1158 rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL);
1162 if (strcasecmp(key, "DEVPATH") == 0) {
1163 if (op > OP_MATCH_MAX) {
1164 err(rules->udev, "invalid DEVPATH operation\n");
1167 rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
1171 if (strcasecmp(key, "KERNEL") == 0) {
1172 if (op > OP_MATCH_MAX) {
1173 err(rules->udev, "invalid KERNEL operation\n");
1176 rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL);
1180 if (strcasecmp(key, "SUBSYSTEM") == 0) {
1181 if (op > OP_MATCH_MAX) {
1182 err(rules->udev, "invalid SUBSYSTEM operation\n");
1185 /* bus, class, subsystem events should all be the same */
1186 if (strcmp(value, "subsystem") == 0 ||
1187 strcmp(value, "bus") == 0 ||
1188 strcmp(value, "class") == 0) {
1189 if (strcmp(value, "bus") == 0 || strcmp(value, "class") == 0)
1190 err(rules->udev, "'%s' must be specified as 'subsystem' \n"
1191 "please fix it in %s:%u", value, filename, lineno);
1192 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
1194 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
1198 if (strcasecmp(key, "DRIVER") == 0) {
1199 if (op > OP_MATCH_MAX) {
1200 err(rules->udev, "invalid DRIVER operation\n");
1203 rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL);
1207 if (strncasecmp(key, "ATTR{", sizeof("ATTR{")-1) == 0) {
1208 attr = get_key_attribute(rules->udev, key + sizeof("ATTR")-1);
1210 err(rules->udev, "error parsing ATTR attribute\n");
1213 if (op < OP_MATCH_MAX) {
1214 rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
1216 rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr);
1221 if (strcasecmp(key, "KERNELS") == 0 ||
1222 strcasecmp(key, "ID") == 0) {
1223 if (op > OP_MATCH_MAX) {
1224 err(rules->udev, "invalid KERNELS operation\n");
1227 rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1231 if (strcasecmp(key, "SUBSYSTEMS") == 0 ||
1232 strcasecmp(key, "BUS") == 0) {
1233 if (op > OP_MATCH_MAX) {
1234 err(rules->udev, "invalid SUBSYSTEMS operation\n");
1237 rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1241 if (strcasecmp(key, "DRIVERS") == 0) {
1242 if (op > OP_MATCH_MAX) {
1243 err(rules->udev, "invalid DRIVERS operation\n");
1246 rule_add_key(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
1250 if (strncasecmp(key, "ATTRS{", sizeof("ATTRS{")-1) == 0 ||
1251 strncasecmp(key, "SYSFS{", sizeof("SYSFS{")-1) == 0) {
1252 if (op > OP_MATCH_MAX) {
1253 err(rules->udev, "invalid ATTRS operation\n");
1256 attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
1258 err(rules->udev, "error parsing ATTRS attribute\n");
1261 if (strncmp(attr, "device/", 7) == 0)
1262 err(rules->udev, "the 'device' link may not be available in a future kernel, "
1263 "please fix it in %s:%u", filename, lineno);
1264 else if (strstr(attr, "../") != NULL)
1265 err(rules->udev, "do not reference parent sysfs directories directly, "
1266 "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
1267 rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1271 if (strncasecmp(key, "ENV{", sizeof("ENV{")-1) == 0) {
1272 attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1);
1274 err(rules->udev, "error parsing ENV attribute\n");
1277 if (op < OP_MATCH_MAX) {
1278 if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
1281 if (rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
1287 if (strcasecmp(key, "PROGRAM") == 0) {
1288 rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
1292 if (strcasecmp(key, "RESULT") == 0) {
1293 if (op > OP_MATCH_MAX) {
1294 err(rules->udev, "invalid RESULT operation\n");
1297 rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL);
1301 if (strncasecmp(key, "IMPORT", sizeof("IMPORT")-1) == 0) {
1302 attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1);
1303 if (attr != NULL && strstr(attr, "program")) {
1304 dbg(rules->udev, "IMPORT will be executed\n");
1305 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1306 } else if (attr != NULL && strstr(attr, "file")) {
1307 dbg(rules->udev, "IMPORT will be included as file\n");
1308 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1309 } else if (attr != NULL && strstr(attr, "parent")) {
1310 dbg(rules->udev, "IMPORT will include the parent values\n");
1311 rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
1313 /* figure it out if it is executable */
1314 char file[UTIL_PATH_SIZE];
1316 struct stat statbuf;
1318 /* allow programs in /lib/udev called without the path */
1319 if (value[0] != '/')
1320 util_strscpyl(file, sizeof(file), UDEV_PREFIX "/lib/udev/", value, NULL);
1322 util_strscpy(file, sizeof(file), value);
1323 pos = strchr(file, ' ');
1326 dbg(rules->udev, "IMPORT auto mode for '%s'\n", file);
1327 if (stat(file, &statbuf) == 0 && (statbuf.st_mode & S_IXUSR)) {
1328 dbg(rules->udev, "IMPORT will be executed (autotype)\n");
1329 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1331 dbg(rules->udev, "IMPORT will be included as file (autotype)\n");
1332 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1338 if (strncasecmp(key, "TEST", sizeof("TEST")-1) == 0) {
1341 if (op > OP_MATCH_MAX) {
1342 err(rules->udev, "invalid TEST operation\n");
1345 attr = get_key_attribute(rules->udev, key + sizeof("TEST")-1);
1347 mode = strtol(attr, NULL, 8);
1348 rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode);
1350 rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL);
1355 if (strncasecmp(key, "RUN", sizeof("RUN")-1) == 0) {
1358 attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1);
1359 if (attr != NULL && strstr(attr, "ignore_error"))
1361 rule_add_key(&rule_tmp, TK_A_RUN, op, value, &flag);
1365 if (strcasecmp(key, "WAIT_FOR") == 0 || strcasecmp(key, "WAIT_FOR_SYSFS") == 0) {
1366 rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1370 if (strcasecmp(key, "LABEL") == 0) {
1371 rule_tmp.rule.rule.label_off = add_string(rules, value);
1375 if (strcasecmp(key, "GOTO") == 0) {
1376 rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1380 if (strncasecmp(key, "NAME", sizeof("NAME")-1) == 0) {
1381 if (op < OP_MATCH_MAX) {
1382 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
1384 if (value[0] == '\0')
1385 info(rules->udev, "name empty, node creation suppressed\n");
1386 rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL);
1387 attr = get_key_attribute(rules->udev, key + sizeof("NAME")-1);
1389 if (strstr(attr, "all_partitions") != NULL) {
1390 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1392 dbg(rules->udev, "creation of partition nodes requested\n");
1393 rule_add_key(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1395 if (strstr(attr, "ignore_remove") != NULL) {
1396 dbg(rules->udev, "remove event should be ignored\n");
1397 rule_add_key(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1401 rule_tmp.rule.rule.flags = 1;
1405 if (strcasecmp(key, "SYMLINK") == 0) {
1406 if (op < OP_MATCH_MAX)
1407 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
1409 rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, NULL);
1410 rule_tmp.rule.rule.flags = 1;
1414 if (strcasecmp(key, "OWNER") == 0) {
1418 uid = strtoul(value, &endptr, 10);
1419 if (endptr[0] == '\0') {
1420 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1421 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1422 uid = add_uid(rules, value);
1423 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1424 } else if (rules->resolve_names >= 0) {
1425 rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
1427 rule_tmp.rule.rule.flags = 1;
1431 if (strcasecmp(key, "GROUP") == 0) {
1435 gid = strtoul(value, &endptr, 10);
1436 if (endptr[0] == '\0') {
1437 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1438 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1439 gid = add_gid(rules, value);
1440 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1441 } else if (rules->resolve_names >= 0) {
1442 rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
1444 rule_tmp.rule.rule.flags = 1;
1448 if (strcasecmp(key, "MODE") == 0) {
1452 mode = strtol(value, &endptr, 8);
1453 if (endptr[0] == '\0')
1454 rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1456 rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
1457 rule_tmp.rule.rule.flags = 1;
1461 if (strcasecmp(key, "OPTIONS") == 0) {
1464 if (strstr(value, "last_rule") != NULL) {
1465 dbg(rules->udev, "last rule to be applied\n");
1466 rule_add_key(&rule_tmp, TK_A_LAST_RULE, 0, NULL, NULL);
1468 if (strstr(value, "ignore_device") != NULL) {
1469 dbg(rules->udev, "device should be ignored\n");
1470 rule_add_key(&rule_tmp, TK_A_IGNORE_DEVICE, 0, NULL, NULL);
1472 if (strstr(value, "ignore_remove") != NULL) {
1473 dbg(rules->udev, "remove event should be ignored\n");
1474 rule_add_key(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1476 pos = strstr(value, "link_priority=");
1478 int prio = atoi(&pos[strlen("link_priority=")]);
1480 rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, 0, NULL, &prio);
1481 dbg(rules->udev, "link priority=%i\n", prio);
1483 pos = strstr(value, "event_timeout=");
1485 int tout = atoi(&pos[strlen("event_timeout=")]);
1487 rule_add_key(&rule_tmp, TK_A_EVENT_TIMEOUT, 0, NULL, &tout);
1488 dbg(rules->udev, "event timout=%i\n", tout);
1490 pos = strstr(value, "string_escape=");
1492 pos = &pos[strlen("string_escape=")];
1493 if (strncmp(pos, "none", strlen("none")) == 0)
1494 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, 0, NULL, NULL);
1495 else if (strncmp(pos, "replace", strlen("replace")) == 0)
1496 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, 0, NULL, NULL);
1498 if (strstr(value, "all_partitions") != NULL) {
1499 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1501 rule_add_key(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1502 dbg(rules->udev, "creation of partition nodes requested\n");
1504 pos = strstr(value, "nowatch");
1508 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, 0, NULL, &off);
1509 dbg(rules->udev, "inotify watch of device disabled\n");
1511 pos = strstr(value, "watch");
1515 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, 0, NULL, &on);
1516 dbg(rules->udev, "inotify watch of device requested\n");
1521 err(rules->udev, "unknown key '%s' in %s:%u\n", key, filename, lineno);
1524 /* add rule token */
1525 rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur;
1526 if (add_token(rules, &rule_tmp.rule) != 0)
1529 /* add tokens to list, sorted by type */
1530 if (sort_token(rules, &rule_tmp) != 0)
1535 err(rules->udev, "invalid rule '%s:%u'\n", filename, lineno);
1539 static int parse_file(struct udev_rules *rules, const char *filename, unsigned short filename_off)
1542 unsigned int first_token;
1543 char line[UTIL_LINE_SIZE];
1547 info(rules->udev, "reading '%s' as rules file\n", filename);
1549 f = fopen(filename, "r");
1553 first_token = rules->token_cur;
1555 while(fgets(line, sizeof(line), f) != NULL) {
1559 /* skip whitespace */
1562 while (isspace(key[0]))
1573 /* continue reading if backslash+newline is found */
1574 while (line[len-2] == '\\') {
1575 if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1581 if (len+1 >= sizeof(line)) {
1582 err(rules->udev, "line too long '%s':%u, ignored\n", filename, line_nr);
1585 add_rule(rules, key, filename, filename_off, line_nr);
1589 /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1590 for (i = first_token+1; i < rules->token_cur; i++) {
1591 if (rules->tokens[i].type == TK_A_GOTO) {
1592 char *label = &rules->buf[rules->tokens[i].key.value_off];
1595 for (j = i+1; j < rules->token_cur; j++) {
1596 if (rules->tokens[j].type != TK_RULE)
1598 if (rules->tokens[j].rule.label_off == 0)
1600 if (strcmp(label, &rules->buf[rules->tokens[j].rule.label_off]) != 0)
1602 rules->tokens[i].key.rule_goto = j;
1605 if (rules->tokens[i].key.rule_goto == 0)
1606 err(rules->udev, "GOTO '%s' has no matching label in: '%s'\n", label, filename);
1612 static int add_matching_files(struct udev *udev, struct udev_list_node *file_list, const char *dirname, const char *suffix)
1615 char filename[UTIL_PATH_SIZE];
1617 dbg(udev, "open directory '%s'\n", dirname);
1618 dir = opendir(dirname);
1620 info(udev, "unable to open '%s': %m\n", dirname);
1625 struct dirent *dent;
1627 dent = readdir(dir);
1628 if (dent == NULL || dent->d_name[0] == '\0')
1631 if (dent->d_name[0] == '.')
1634 /* look for file matching with specified suffix */
1635 if (suffix != NULL) {
1638 ext = strrchr(dent->d_name, '.');
1641 if (strcmp(ext, suffix) != 0)
1644 util_strscpyl(filename, sizeof(filename), dirname, "/", dent->d_name, NULL);
1645 dbg(udev, "put file '%s' into list\n", filename);
1646 udev_list_entry_add(udev, file_list, filename, NULL, 1, 1);
1653 struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
1655 struct udev_rules *rules;
1656 struct stat statbuf;
1657 struct udev_list_node file_list;
1658 struct udev_list_entry *file_loop, *file_tmp;
1659 struct token end_token;
1661 rules = malloc(sizeof(struct udev_rules));
1664 memset(rules, 0x00, sizeof(struct udev_rules));
1666 rules->resolve_names = resolve_names;
1667 udev_list_init(&file_list);
1669 /* init token array and string buffer */
1670 rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
1671 if (rules->tokens == NULL)
1673 rules->token_max = PREALLOC_TOKEN;
1675 rules->buf = malloc(PREALLOC_STRBUF);
1676 if (rules->buf == NULL)
1678 rules->buf_max = PREALLOC_STRBUF;
1679 /* offset 0 is always '\0' */
1680 rules->buf[0] = '\0';
1682 dbg(udev, "prealloc %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1683 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1685 rules->trie_nodes = malloc(PREALLOC_TRIE * sizeof(struct trie_node));
1686 if (rules->trie_nodes == NULL)
1688 rules->trie_nodes_max = PREALLOC_TRIE;
1689 /* offset 0 is the trie root, with an empty string */
1690 memset(rules->trie_nodes, 0x00, sizeof(struct trie_node));
1691 rules->trie_nodes_cur = 1;
1693 if (udev_get_rules_path(udev) != NULL) {
1694 /* custom rules location for testing */
1695 add_matching_files(udev, &file_list, udev_get_rules_path(udev), ".rules");
1697 char filename[PATH_MAX];
1698 struct udev_list_node sort_list;
1699 struct udev_list_entry *sort_loop, *sort_tmp;
1701 /* read user/custom rules */
1702 add_matching_files(udev, &file_list, SYSCONFDIR "/udev/rules.d", ".rules");
1704 /* read dynamic/temporary rules */
1705 util_strscpyl(filename, sizeof(filename), udev_get_dev_path(udev), "/.udev/rules.d", NULL);
1706 if (stat(filename, &statbuf) != 0) {
1707 util_create_path(udev, filename);
1708 udev_selinux_setfscreatecon(udev, filename, S_IFDIR|0755);
1709 mkdir(filename, 0755);
1710 udev_selinux_resetfscreatecon(udev);
1712 udev_list_init(&sort_list);
1713 add_matching_files(udev, &sort_list, filename, ".rules");
1715 /* read default rules */
1716 add_matching_files(udev, &sort_list, UDEV_PREFIX "/lib/udev/rules.d", ".rules");
1718 /* sort all rules files by basename into list of files */
1719 udev_list_entry_foreach_safe(sort_loop, sort_tmp, udev_list_get_entry(&sort_list)) {
1720 const char *sort_name = udev_list_entry_get_name(sort_loop);
1721 const char *sort_base = strrchr(sort_name, '/');
1723 if (sort_base == NULL)
1725 /* sort entry into existing list */
1726 udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1727 const char *file_name = udev_list_entry_get_name(file_loop);
1728 const char *file_base = strrchr(file_name, '/');
1730 if (file_base == NULL)
1732 if (strcmp(file_base, sort_base) == 0) {
1733 info(udev, "rule file basename '%s' already added, ignoring '%s'\n",
1734 file_name, sort_name);
1735 udev_list_entry_delete(sort_loop);
1739 if (strcmp(file_base, sort_base) > 0) {
1740 /* found later file, insert before */
1741 udev_list_entry_remove(sort_loop);
1742 udev_list_entry_insert_before(sort_loop, file_loop);
1747 /* current file already handled */
1748 if (sort_loop == NULL)
1750 /* no later file, append to end of list */
1751 udev_list_entry_remove(sort_loop);
1752 udev_list_entry_append(sort_loop, &file_list);
1756 /* add all filenames to the string buffer */
1757 udev_list_entry_foreach(file_loop, udev_list_get_entry(&file_list)) {
1758 const char *filename = udev_list_entry_get_name(file_loop);
1759 unsigned int filename_off;
1761 filename_off = add_string(rules, filename);
1762 /* the offset in the rule is limited to unsigned short */
1763 if (filename_off < USHRT_MAX)
1764 udev_list_entry_set_flag(file_loop, filename_off);
1767 /* parse list of files */
1768 udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1769 const char *filename = udev_list_entry_get_name(file_loop);
1770 unsigned int filename_off = udev_list_entry_get_flag(file_loop);
1772 if (stat(filename, &statbuf) == 0 && statbuf.st_size > 0)
1773 parse_file(rules, filename, filename_off);
1775 info(udev, "can not read '%s'\n", filename);
1776 udev_list_entry_delete(file_loop);
1779 memset(&end_token, 0x00, sizeof(struct token));
1780 end_token.type = TK_END;
1781 add_token(rules, &end_token);
1783 /* shrink allocated token and string buffer */
1784 if (rules->token_cur < rules->token_max) {
1785 struct token *tokens;
1787 tokens = realloc(rules->tokens, rules->token_cur * sizeof(struct token));
1788 if (tokens != NULL || rules->token_cur == 0) {
1789 rules->tokens = tokens;
1790 rules->token_max = rules->token_cur;
1793 if (rules->buf_cur < rules->buf_max) {
1796 buf = realloc(rules->buf, rules->buf_cur);
1797 if (buf != NULL || rules->buf_cur == 0) {
1799 rules->buf_max = rules->buf_cur;
1802 info(udev, "rules use %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1803 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1804 info(udev, "temporary index used %zu bytes (%u * %zu bytes)\n",
1805 rules->trie_nodes_cur * sizeof(struct trie_node),
1806 rules->trie_nodes_cur, sizeof(struct trie_node));
1809 free(rules->trie_nodes);
1810 rules->trie_nodes = NULL;
1811 rules->trie_nodes_cur = 0;
1812 rules->trie_nodes_max = 0;
1814 /* cleanup uid/gid cache */
1817 rules->uids_cur = 0;
1818 rules->uids_max = 0;
1821 rules->gids_cur = 0;
1822 rules->gids_max = 0;
1828 void udev_rules_unref(struct udev_rules *rules)
1832 free(rules->tokens);
1834 free(rules->trie_nodes);
1840 static int match_key(struct udev_rules *rules, struct token *token, const char *val)
1842 char *key_value = &rules->buf[token->key.value_off];
1849 switch (token->key.glob) {
1851 match = (strcmp(key_value, val) == 0);
1854 match = (fnmatch(key_value, val, 0) == 0);
1861 split = &rules->buf[token->key.value_off];
1866 next = strchr(split, '|');
1868 size_t matchlen = (size_t)(next - split);
1870 match = (matchlen == len && strncmp(split, val, matchlen) == 0);
1874 match = (strcmp(split, val) == 0);
1883 char value[UTIL_PATH_SIZE];
1885 util_strscpy(value, sizeof(value), &rules->buf[token->key.value_off]);
1887 while (key_value != NULL) {
1888 pos = strchr(key_value, '|');
1893 dbg(rules->udev, "match %s '%s' <-> '%s'\n", token_str(token->type), key_value, val);
1894 match = (fnmatch(key_value, val, 0) == 0);
1902 match = (val[0] != '\0');
1909 if (match && (token->key.op == OP_MATCH)) {
1910 dbg(rules->udev, "%s is true (matching value)\n", token_str(token->type));
1913 if (!match && (token->key.op == OP_NOMATCH)) {
1914 dbg(rules->udev, "%s is true (non-matching value)\n", token_str(token->type));
1917 dbg(rules->udev, "%s is not true\n", token_str(token->type));
1921 static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur)
1923 const char *key_name = &rules->buf[cur->key.attr_off];
1924 const char *key_value = &rules->buf[cur->key.value_off];
1925 char value[UTIL_NAME_SIZE];
1929 if (key_name[0] == '[') {
1930 char attr[UTIL_PATH_SIZE];
1932 util_strscpy(attr, sizeof(attr), key_name);
1933 util_resolve_subsys_kernel(event->udev, attr, value, sizeof(value), 1);
1935 if (value[0] == '\0') {
1938 val = udev_device_get_sysattr_value(dev, key_name);
1941 util_strscpy(value, sizeof(value), val);
1944 /* strip trailing whitespace of value, if not asked to match for it */
1945 len = strlen(key_value);
1946 if (len > 0 && !isspace(key_value[len-1])) {
1947 len = strlen(value);
1948 while (len > 0 && isspace(value[--len]))
1950 dbg(rules->udev, "removed trailing whitespace from '%s'\n", value);
1952 return match_key(rules, cur, value);
1961 int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event)
1965 enum escape_type esc = ESCAPE_UNSET;
1968 if (rules->tokens == NULL)
1971 can_set_name = ((strcmp(udev_device_get_action(event->dev), "add") == 0 ||
1972 strcmp(udev_device_get_action(event->dev), "change") == 0) &&
1973 (major(udev_device_get_devnum(event->dev)) > 0 ||
1974 strcmp(udev_device_get_subsystem(event->dev), "net") == 0));
1976 /* loop through token list, match, run actions or forward to next rule */
1977 cur = &rules->tokens[0];
1980 dump_token(rules, cur);
1981 switch (cur->type) {
1985 /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
1986 if (!can_set_name && rule->rule.flags)
1991 if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
1995 if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
1999 if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
2004 size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
2005 struct udev_list_entry *list_entry;
2008 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
2009 const char *devlink;
2011 devlink = &udev_list_entry_get_name(list_entry)[devlen];
2012 if (match_key(rules, cur, devlink) == 0) {
2022 if (match_key(rules, cur, event->name) != 0)
2027 const char *key_name = &rules->buf[cur->key.attr_off];
2030 value = udev_device_get_property_value(event->dev, key_name);
2031 if (value == NULL) {
2032 dbg(event->udev, "ENV{%s} is not set, treat as empty\n", key_name);
2035 if (match_key(rules, cur, value))
2039 case TK_M_SUBSYSTEM:
2040 if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
2044 if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
2049 char filename[UTIL_PATH_SIZE];
2052 udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename));
2053 found = (wait_for_file(event->dev, filename, 10) == 0);
2054 if (!found && (cur->key.op != OP_NOMATCH))
2059 if (match_attr(rules, event->dev, event, cur) != 0)
2063 case TK_M_SUBSYSTEMS:
2069 /* get whole sequence of parent matches */
2071 while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX)
2074 /* loop over parents */
2075 event->dev_parent = event->dev;
2079 dbg(event->udev, "parent: '%s'\n", udev_device_get_syspath(event->dev_parent));
2080 /* loop over sequence of parent match keys */
2081 for (key = cur; key < next; key++ ) {
2082 dump_token(rules, key);
2085 if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
2088 case TK_M_SUBSYSTEMS:
2089 if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
2093 if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
2097 if (match_attr(rules, event->dev_parent, event, key) != 0)
2103 dbg(event->udev, "parent key matched\n");
2105 dbg(event->udev, "all parent keys matched\n");
2106 /* all keys matched */
2110 event->dev_parent = udev_device_get_parent(event->dev_parent);
2111 if (event->dev_parent == NULL)
2114 /* move behind our sequence of parent match keys */
2120 char filename[UTIL_PATH_SIZE];
2121 struct stat statbuf;
2124 udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename));
2125 if (util_resolve_subsys_kernel(event->udev, filename, filename, sizeof(filename), 0) != 0) {
2126 if (filename[0] != '/') {
2127 char tmp[UTIL_PATH_SIZE];
2129 util_strscpy(tmp, sizeof(tmp), filename);
2130 util_strscpyl(filename, sizeof(filename),
2131 udev_device_get_syspath(event->dev), "/", tmp, NULL);
2134 attr_subst_subdir(filename, sizeof(filename));
2136 match = (stat(filename, &statbuf) == 0);
2137 dbg(event->udev, "'%s' %s", filename, match ? "exists\n" : "does not exist\n");
2138 if (match && cur->key.mode > 0) {
2139 match = ((statbuf.st_mode & cur->key.mode) > 0);
2140 dbg(event->udev, "'%s' has mode=%#o and %s %#o\n", filename, statbuf.st_mode,
2141 match ? "matches" : "does not match", cur->key.mode);
2143 if (match && cur->key.op == OP_NOMATCH)
2145 if (!match && cur->key.op == OP_MATCH)
2151 char program[UTIL_PATH_SIZE];
2153 char result[UTIL_PATH_SIZE];
2155 free(event->program_result);
2156 event->program_result = NULL;
2157 udev_event_apply_format(event, &rules->buf[cur->key.value_off], program, sizeof(program));
2158 envp = udev_device_get_properties_envp(event->dev);
2159 info(event->udev, "PROGRAM '%s' %s:%u\n",
2161 &rules->buf[rule->rule.filename_off],
2162 rule->rule.filename_line);
2163 if (util_run_program(event->udev, program, envp, result, sizeof(result), NULL) != 0) {
2164 if (cur->key.op != OP_NOMATCH)
2169 util_remove_trailing_chars(result, '\n');
2170 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2171 count = udev_util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
2173 info(event->udev, "%i character(s) replaced\n" , count);
2175 event->program_result = strdup(result);
2176 dbg(event->udev, "storing result '%s'\n", event->program_result);
2177 if (cur->key.op == OP_NOMATCH)
2182 case TK_M_IMPORT_FILE:
2184 char import[UTIL_PATH_SIZE];
2186 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2187 if (import_file_into_properties(event->dev, import) != 0)
2188 if (cur->key.op != OP_NOMATCH)
2192 case TK_M_IMPORT_PROG:
2194 char import[UTIL_PATH_SIZE];
2196 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2197 info(event->udev, "IMPORT '%s' %s:%u\n",
2199 &rules->buf[rule->rule.filename_off],
2200 rule->rule.filename_line);
2201 if (import_program_into_properties(event->dev, import) != 0)
2202 if (cur->key.op != OP_NOMATCH)
2206 case TK_M_IMPORT_PARENT:
2208 char import[UTIL_PATH_SIZE];
2210 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2211 if (import_parent_into_properties(event->dev, import) != 0)
2212 if (cur->key.op != OP_NOMATCH)
2217 if (match_key(rules, cur, event->program_result) != 0)
2221 case TK_A_IGNORE_DEVICE:
2222 event->ignore_device = 1;
2225 case TK_A_STRING_ESCAPE_NONE:
2228 case TK_A_STRING_ESCAPE_REPLACE:
2229 esc = ESCAPE_REPLACE;
2231 case TK_A_NUM_FAKE_PART:
2232 if (strcmp(udev_device_get_subsystem(event->dev), "block") != 0)
2234 if (udev_device_get_sysnum(event->dev) != NULL)
2236 udev_device_set_num_fake_partitions(event->dev, cur->key.num_fake_part);
2238 case TK_A_INOTIFY_WATCH:
2239 event->inotify_watch = cur->key.watch;
2241 case TK_A_DEVLINK_PRIO:
2242 udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
2246 char owner[UTIL_NAME_SIZE];
2248 if (event->owner_final)
2250 if (cur->key.op == OP_ASSIGN_FINAL)
2251 event->owner_final = 1;
2252 udev_event_apply_format(event, &rules->buf[cur->key.value_off], owner, sizeof(owner));
2253 event->uid = util_lookup_user(event->udev, owner);
2254 info(event->udev, "OWNER %u %s:%u\n",
2256 &rules->buf[rule->rule.filename_off],
2257 rule->rule.filename_line);
2262 char group[UTIL_NAME_SIZE];
2264 if (event->group_final)
2266 if (cur->key.op == OP_ASSIGN_FINAL)
2267 event->group_final = 1;
2268 udev_event_apply_format(event, &rules->buf[cur->key.value_off], group, sizeof(group));
2269 event->gid = util_lookup_group(event->udev, group);
2270 info(event->udev, "GROUP %u %s:%u\n",
2272 &rules->buf[rule->rule.filename_off],
2273 rule->rule.filename_line);
2278 char mode[UTIL_NAME_SIZE];
2281 if (event->mode_final)
2283 if (cur->key.op == OP_ASSIGN_FINAL)
2284 event->mode_final = 1;
2285 udev_event_apply_format(event, &rules->buf[cur->key.value_off], mode, sizeof(mode));
2286 event->mode = strtol(mode, &endptr, 8);
2287 if (endptr[0] != '\0') {
2288 err(event->udev, "invalide mode '%s' set default mode 0660\n", mode);
2291 info(event->udev, "MODE %#o %s:%u\n",
2293 &rules->buf[rule->rule.filename_off],
2294 rule->rule.filename_line);
2298 if (event->owner_final)
2300 if (cur->key.op == OP_ASSIGN_FINAL)
2301 event->owner_final = 1;
2302 event->uid = cur->key.uid;
2303 info(event->udev, "OWNER %u %s:%u\n",
2305 &rules->buf[rule->rule.filename_off],
2306 rule->rule.filename_line);
2309 if (event->group_final)
2311 if (cur->key.op == OP_ASSIGN_FINAL)
2312 event->group_final = 1;
2313 event->gid = cur->key.gid;
2314 info(event->udev, "GROUP %u %s:%u\n",
2316 &rules->buf[rule->rule.filename_off],
2317 rule->rule.filename_line);
2320 if (event->mode_final)
2322 if (cur->key.op == OP_ASSIGN_FINAL)
2323 event->mode_final = 1;
2324 event->mode = cur->key.mode;
2325 info(event->udev, "MODE %#o %s:%u\n",
2327 &rules->buf[rule->rule.filename_off],
2328 rule->rule.filename_line);
2332 const char *name = &rules->buf[cur->key.attr_off];
2333 char *value = &rules->buf[cur->key.value_off];
2335 if (value[0] != '\0') {
2336 char temp_value[UTIL_NAME_SIZE];
2337 struct udev_list_entry *entry;
2339 udev_event_apply_format(event, value, temp_value, sizeof(temp_value));
2340 entry = udev_device_add_property(event->dev, name, temp_value);
2342 udev_list_entry_set_flag(entry, 1);
2344 udev_device_add_property(event->dev, name, NULL);
2350 const char *name = &rules->buf[cur->key.value_off];
2351 char name_str[UTIL_PATH_SIZE];
2354 if (event->name_final)
2356 if (cur->key.op == OP_ASSIGN_FINAL)
2357 event->name_final = 1;
2358 udev_event_apply_format(event, name, name_str, sizeof(name_str));
2359 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2360 count = udev_util_replace_chars(name_str, "/");
2362 info(event->udev, "%i character(s) replaced\n", count);
2365 event->name = strdup(name_str);
2366 info(event->udev, "NAME '%s' %s:%u\n",
2368 &rules->buf[rule->rule.filename_off],
2369 rule->rule.filename_line);
2374 char temp[UTIL_PATH_SIZE];
2375 char filename[UTIL_PATH_SIZE];
2379 if (event->devlink_final)
2381 if (major(udev_device_get_devnum(event->dev)) == 0)
2383 if (cur->key.op == OP_ASSIGN_FINAL)
2384 event->devlink_final = 1;
2385 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2386 udev_device_cleanup_devlinks_list(event->dev);
2388 /* allow multiple symlinks separated by spaces */
2389 udev_event_apply_format(event, &rules->buf[cur->key.value_off], temp, sizeof(temp));
2390 if (esc == ESCAPE_UNSET)
2391 count = udev_util_replace_chars(temp, "/ ");
2392 else if (esc == ESCAPE_REPLACE)
2393 count = udev_util_replace_chars(temp, "/");
2395 info(event->udev, "%i character(s) replaced\n" , count);
2396 dbg(event->udev, "rule applied, added symlink(s) '%s'\n", temp);
2398 while (isspace(pos[0]))
2400 next = strchr(pos, ' ');
2403 info(event->udev, "LINK '%s' %s:%u\n",
2405 &rules->buf[rule->rule.filename_off],
2406 rule->rule.filename_line);
2407 util_strscpyl(filename, sizeof(filename), udev_get_dev_path(event->udev), "/", pos, NULL);
2408 udev_device_add_devlink(event->dev, filename);
2409 while (isspace(next[1]))
2412 next = strchr(pos, ' ');
2414 if (pos[0] != '\0') {
2415 info(event->udev, "LINK '%s' %s:%u\n",
2417 &rules->buf[rule->rule.filename_off],
2418 rule->rule.filename_line);
2419 util_strscpyl(filename, sizeof(filename), udev_get_dev_path(event->udev), "/", pos, NULL);
2420 udev_device_add_devlink(event->dev, filename);
2424 case TK_A_EVENT_TIMEOUT:
2425 udev_device_set_event_timeout(event->dev, cur->key.event_timeout);
2427 case TK_A_IGNORE_REMOVE:
2428 udev_device_set_ignore_remove(event->dev, 1);
2432 const char *key_name = &rules->buf[cur->key.attr_off];
2433 char attr[UTIL_PATH_SIZE];
2434 char value[UTIL_NAME_SIZE];
2437 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0)
2438 util_strscpyl(attr, sizeof(attr), udev_device_get_syspath(event->dev), "/", key_name, NULL);
2439 attr_subst_subdir(attr, sizeof(attr));
2441 udev_event_apply_format(event, &rules->buf[cur->key.value_off], value, sizeof(value));
2442 info(event->udev, "ATTR '%s' writing '%s' %s:%u\n", attr, value,
2443 &rules->buf[rule->rule.filename_off],
2444 rule->rule.filename_line);
2445 f = fopen(attr, "w");
2447 if (fprintf(f, "%s", value) <= 0)
2448 err(event->udev, "error writing ATTR{%s}: %m\n", attr);
2451 err(event->udev, "error opening ATTR{%s} for writing: %m\n", attr);
2457 struct udev_list_entry *list_entry;
2459 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2460 udev_list_cleanup_entries(event->udev, &event->run_list);
2461 info(event->udev, "RUN '%s' %s:%u\n",
2462 &rules->buf[cur->key.value_off],
2463 &rules->buf[rule->rule.filename_off],
2464 rule->rule.filename_line);
2465 list_entry = udev_list_entry_add(event->udev, &event->run_list,
2466 &rules->buf[cur->key.value_off], NULL, 1, 0);
2467 if (cur->key.ignore_error)
2468 udev_list_entry_set_flag(list_entry, 1);
2472 if (cur->key.rule_goto == 0)
2474 cur = &rules->tokens[cur->key.rule_goto];
2476 case TK_A_LAST_RULE:
2480 case TK_M_PARENTS_MIN:
2481 case TK_M_PARENTS_MAX:
2484 err(rules->udev, "wrong type %u\n", cur->type);
2491 /* fast-forward to next rule */
2492 cur = rule + rule->rule.token_count;
2493 dbg(rules->udev, "forward to rule: %u\n",
2494 (unsigned int) (cur - rules->tokens));