2 * Copyright (C) 2003-2010 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/>.
35 #define PREALLOC_TOKEN 2048
36 #define PREALLOC_STRBUF 32 * 1024
37 #define PREALLOC_TRIE 256
39 /* configuration directories with last modification timestamp */
40 static const char *rules_dirs[] = {
41 TEST_PREFIX UDEVLIBEXECDIR "/rules.d",
42 TEST_PREFIX "/run/udev/rules.d",
43 TEST_PREFIX SYSCONFDIR "/udev/rules.d",
47 unsigned int name_off;
55 /* this node's first child */
56 unsigned int child_idx;
57 /* the next child of our parent node's child list */
58 unsigned int next_child_idx;
59 /* this node's last child (shortcut for append) */
60 unsigned int last_child_idx;
61 unsigned int value_off;
62 unsigned short value_len;
68 unsigned long long dirs_ts_usec[ELEMENTSOF(rules_dirs)];
71 /* every key in the rules file becomes a token */
73 unsigned int token_cur;
74 unsigned int token_max;
76 /* all key strings are copied to a single string buffer */
80 unsigned int buf_count;
82 /* during rule parsing, strings are indexed to find duplicates */
83 struct trie_node *trie_nodes;
84 unsigned int trie_nodes_cur;
85 unsigned int trie_nodes_max;
87 /* during rule parsing, uid/gid lookup results are cached */
89 unsigned int uids_cur;
90 unsigned int uids_max;
92 unsigned int gids_cur;
93 unsigned int gids_max;
96 /* KEY=="", KEY!="", KEY+="", KEY="", KEY:="" */
109 enum string_glob_type {
111 GL_PLAIN, /* no special chars */
112 GL_GLOB, /* shell globs ?,*,[] */
113 GL_SPLIT, /* multi-value A|B */
114 GL_SPLIT_GLOB, /* multi-value with glob A*|B* */
115 GL_SOMETHING, /* commonly used "?*" */
118 enum string_subst_type {
125 /* tokens of a rule are sorted/handled in this order */
130 TK_M_ACTION, /* val */
131 TK_M_DEVPATH, /* val */
132 TK_M_KERNEL, /* val */
133 TK_M_DEVLINK, /* val */
135 TK_M_ENV, /* val, attr */
137 TK_M_SUBSYSTEM, /* val */
138 TK_M_DRIVER, /* val */
139 TK_M_WAITFOR, /* val */
140 TK_M_ATTR, /* val, attr */
143 TK_M_KERNELS, /* val */
144 TK_M_SUBSYSTEMS, /* val */
145 TK_M_DRIVERS, /* val */
146 TK_M_ATTRS, /* val, attr */
150 TK_M_TEST, /* val, mode_t */
151 TK_M_EVENT_TIMEOUT, /* int */
152 TK_M_PROGRAM, /* val */
153 TK_M_IMPORT_FILE, /* val */
154 TK_M_IMPORT_PROG, /* val */
155 TK_M_IMPORT_BUILTIN, /* val */
156 TK_M_IMPORT_DB, /* val */
157 TK_M_IMPORT_CMDLINE, /* val */
158 TK_M_IMPORT_PARENT, /* val */
159 TK_M_RESULT, /* val */
162 TK_A_STRING_ESCAPE_NONE,
163 TK_A_STRING_ESCAPE_REPLACE,
165 TK_A_INOTIFY_WATCH, /* int */
166 TK_A_DEVLINK_PRIO, /* int */
167 TK_A_OWNER, /* val */
168 TK_A_GROUP, /* val */
170 TK_A_OWNER_ID, /* uid_t */
171 TK_A_GROUP_ID, /* gid_t */
172 TK_A_MODE_ID, /* mode_t */
173 TK_A_STATIC_NODE, /* val */
174 TK_A_ENV, /* val, attr */
177 TK_A_DEVLINK, /* val */
178 TK_A_ATTR, /* val, attr */
179 TK_A_RUN_BUILTIN, /* val, bool */
180 TK_A_RUN_PROGRAM, /* val, bool */
181 TK_A_GOTO, /* size_t */
186 /* we try to pack stuff in a way that we take only 12 bytes per token */
189 unsigned char type; /* same in rule and key */
191 enum token_type type:8;
193 bool has_static_node:1;
194 unsigned int unused:6;
195 unsigned short token_count;
196 unsigned int label_off;
197 unsigned short filename_off;
198 unsigned short filename_line;
201 enum token_type type:8;
202 enum operation_type op:8;
203 enum string_glob_type glob:8;
204 enum string_subst_type subst:4;
205 enum string_subst_type attrsubst:4;
206 unsigned int value_off;
208 unsigned int attr_off;
210 unsigned int rule_goto;
217 enum udev_builtin_cmd builtin_cmd;
225 struct udev_rules *rules;
227 struct token token[MAX_TK];
228 unsigned int token_cur;
232 static const char *operation_str(enum operation_type type)
234 static const char *operation_strs[] = {
235 [OP_UNSET] = "UNSET",
236 [OP_MATCH] = "match",
237 [OP_NOMATCH] = "nomatch",
238 [OP_MATCH_MAX] = "MATCH_MAX",
241 [OP_ASSIGN] = "assign",
242 [OP_ASSIGN_FINAL] = "assign-final",
245 return operation_strs[type];
248 static const char *string_glob_str(enum string_glob_type type)
250 static const char *string_glob_strs[] = {
251 [GL_UNSET] = "UNSET",
252 [GL_PLAIN] = "plain",
254 [GL_SPLIT] = "split",
255 [GL_SPLIT_GLOB] = "split-glob",
256 [GL_SOMETHING] = "split-glob",
259 return string_glob_strs[type];
262 static const char *token_str(enum token_type type)
264 static const char *token_strs[] = {
265 [TK_UNSET] = "UNSET",
268 [TK_M_ACTION] = "M ACTION",
269 [TK_M_DEVPATH] = "M DEVPATH",
270 [TK_M_KERNEL] = "M KERNEL",
271 [TK_M_DEVLINK] = "M DEVLINK",
272 [TK_M_NAME] = "M NAME",
273 [TK_M_ENV] = "M ENV",
274 [TK_M_TAG] = "M TAG",
275 [TK_M_SUBSYSTEM] = "M SUBSYSTEM",
276 [TK_M_DRIVER] = "M DRIVER",
277 [TK_M_WAITFOR] = "M WAITFOR",
278 [TK_M_ATTR] = "M ATTR",
280 [TK_M_PARENTS_MIN] = "M PARENTS_MIN",
281 [TK_M_KERNELS] = "M KERNELS",
282 [TK_M_SUBSYSTEMS] = "M SUBSYSTEMS",
283 [TK_M_DRIVERS] = "M DRIVERS",
284 [TK_M_ATTRS] = "M ATTRS",
285 [TK_M_TAGS] = "M TAGS",
286 [TK_M_PARENTS_MAX] = "M PARENTS_MAX",
288 [TK_M_TEST] = "M TEST",
289 [TK_M_EVENT_TIMEOUT] = "M EVENT_TIMEOUT",
290 [TK_M_PROGRAM] = "M PROGRAM",
291 [TK_M_IMPORT_FILE] = "M IMPORT_FILE",
292 [TK_M_IMPORT_PROG] = "M IMPORT_PROG",
293 [TK_M_IMPORT_BUILTIN] = "M IMPORT_BUILTIN",
294 [TK_M_IMPORT_DB] = "M IMPORT_DB",
295 [TK_M_IMPORT_CMDLINE] = "M IMPORT_CMDLINE",
296 [TK_M_IMPORT_PARENT] = "M IMPORT_PARENT",
297 [TK_M_RESULT] = "M RESULT",
298 [TK_M_MAX] = "M MAX",
300 [TK_A_STRING_ESCAPE_NONE] = "A STRING_ESCAPE_NONE",
301 [TK_A_STRING_ESCAPE_REPLACE] = "A STRING_ESCAPE_REPLACE",
302 [TK_A_DB_PERSIST] = "A DB_PERSIST",
303 [TK_A_INOTIFY_WATCH] = "A INOTIFY_WATCH",
304 [TK_A_DEVLINK_PRIO] = "A DEVLINK_PRIO",
305 [TK_A_OWNER] = "A OWNER",
306 [TK_A_GROUP] = "A GROUP",
307 [TK_A_MODE] = "A MODE",
308 [TK_A_OWNER_ID] = "A OWNER_ID",
309 [TK_A_GROUP_ID] = "A GROUP_ID",
310 [TK_A_STATIC_NODE] = "A STATIC_NODE",
311 [TK_A_MODE_ID] = "A MODE_ID",
312 [TK_A_ENV] = "A ENV",
313 [TK_A_TAG] = "A ENV",
314 [TK_A_NAME] = "A NAME",
315 [TK_A_DEVLINK] = "A DEVLINK",
316 [TK_A_ATTR] = "A ATTR",
317 [TK_A_RUN_BUILTIN] = "A RUN_BUILTIN",
318 [TK_A_RUN_PROGRAM] = "A RUN_PROGRAM",
319 [TK_A_GOTO] = "A GOTO",
324 return token_strs[type];
327 static void dump_token(struct udev_rules *rules, struct token *token)
329 enum token_type type = token->type;
330 enum operation_type op = token->key.op;
331 enum string_glob_type glob = token->key.glob;
332 const char *value = &rules->buf[token->key.value_off];
333 const char *attr = &rules->buf[token->key.attr_off];
338 const char *tks_ptr = (char *)rules->tokens;
339 const char *tk_ptr = (char *)token;
340 unsigned int idx = (tk_ptr - tks_ptr) / sizeof(struct token);
342 log_debug("* RULE %s:%u, token: %u, count: %u, label: '%s'\n",
343 &rules->buf[token->rule.filename_off], token->rule.filename_line,
344 idx, token->rule.token_count,
345 &rules->buf[token->rule.label_off]);
357 case TK_M_SUBSYSTEMS:
361 case TK_M_IMPORT_FILE:
362 case TK_M_IMPORT_PROG:
364 case TK_M_IMPORT_CMDLINE:
365 case TK_M_IMPORT_PARENT:
372 case TK_A_RUN_BUILTIN:
373 case TK_A_RUN_PROGRAM:
374 log_debug("%s %s '%s'(%s)\n",
375 token_str(type), operation_str(op), value, string_glob_str(glob));
377 case TK_M_IMPORT_BUILTIN:
378 log_debug("%s %i '%s'\n", token_str(type), token->key.builtin_cmd, value);
385 log_debug("%s %s '%s' '%s'(%s)\n",
386 token_str(type), operation_str(op), attr, value, string_glob_str(glob));
390 log_debug("%s %s '%s'\n", token_str(type), operation_str(op), value);
392 case TK_A_STRING_ESCAPE_NONE:
393 case TK_A_STRING_ESCAPE_REPLACE:
394 case TK_A_DB_PERSIST:
395 log_debug("%s\n", token_str(type));
398 log_debug("%s %s '%s'(%s) %#o\n",
399 token_str(type), operation_str(op), value, string_glob_str(glob), token->key.mode);
401 case TK_A_INOTIFY_WATCH:
402 log_debug("%s %u\n", token_str(type), token->key.watch);
404 case TK_A_DEVLINK_PRIO:
405 log_debug("%s %u\n", token_str(type), token->key.devlink_prio);
408 log_debug("%s %s %u\n", token_str(type), operation_str(op), token->key.uid);
411 log_debug("%s %s %u\n", token_str(type), operation_str(op), token->key.gid);
414 log_debug("%s %s %#o\n", token_str(type), operation_str(op), token->key.mode);
416 case TK_A_STATIC_NODE:
417 log_debug("%s '%s'\n", token_str(type), value);
419 case TK_M_EVENT_TIMEOUT:
420 log_debug("%s %u\n", token_str(type), token->key.event_timeout);
423 log_debug("%s '%s' %u\n", token_str(type), value, token->key.rule_goto);
426 log_debug("* %s\n", token_str(type));
428 case TK_M_PARENTS_MIN:
429 case TK_M_PARENTS_MAX:
432 log_debug("unknown type %u\n", type);
437 static void dump_rules(struct udev_rules *rules)
441 log_debug("dumping %u (%zu bytes) tokens, %u (%zu bytes) strings\n",
443 rules->token_cur * sizeof(struct token),
446 for(i = 0; i < rules->token_cur; i++)
447 dump_token(rules, &rules->tokens[i]);
450 static inline const char *operation_str(enum operation_type type) { return NULL; }
451 static inline const char *token_str(enum token_type type) { return NULL; }
452 static inline void dump_token(struct udev_rules *rules, struct token *token) {}
453 static inline void dump_rules(struct udev_rules *rules) {}
456 static int add_new_string(struct udev_rules *rules, const char *str, size_t bytes)
460 /* grow buffer if needed */
461 if (rules->buf_cur + bytes+1 >= rules->buf_max) {
465 /* double the buffer size */
466 add = rules->buf_max;
470 buf = realloc(rules->buf, rules->buf_max + add);
474 rules->buf_max += add;
476 off = rules->buf_cur;
477 memcpy(&rules->buf[rules->buf_cur], str, bytes);
478 rules->buf_cur += bytes;
483 static int add_string(struct udev_rules *rules, const char *str)
485 unsigned int node_idx;
486 struct trie_node *new_node;
487 unsigned int new_node_idx;
492 struct trie_node *parent;
494 /* walk trie, start from last character of str to find matching tails */
498 for (depth = 0; depth <= len; depth++) {
499 struct trie_node *node;
500 unsigned int child_idx;
502 node = &rules->trie_nodes[node_idx];
503 off = node->value_off + node->value_len - len;
505 /* match against current node */
506 if (depth == len || (node->value_len >= len && memcmp(&rules->buf[off], str, len) == 0))
509 /* lookup child node */
510 key = str[len - 1 - depth];
511 child_idx = node->child_idx;
512 while (child_idx > 0) {
513 struct trie_node *child;
515 child = &rules->trie_nodes[child_idx];
516 if (child->key == key)
518 child_idx = child->next_child_idx;
522 node_idx = child_idx;
525 /* string not found, add it */
526 off = add_new_string(rules, str, len + 1);
528 /* grow trie nodes if needed */
529 if (rules->trie_nodes_cur >= rules->trie_nodes_max) {
530 struct trie_node *nodes;
533 /* double the buffer size */
534 add = rules->trie_nodes_max;
538 nodes = realloc(rules->trie_nodes, (rules->trie_nodes_max + add) * sizeof(struct trie_node));
541 rules->trie_nodes = nodes;
542 rules->trie_nodes_max += add;
546 new_node_idx = rules->trie_nodes_cur;
547 rules->trie_nodes_cur++;
548 new_node = &rules->trie_nodes[new_node_idx];
549 memset(new_node, 0x00, sizeof(struct trie_node));
550 new_node->value_off = off;
551 new_node->value_len = len;
554 /* join the parent's child list */
555 parent = &rules->trie_nodes[node_idx];
556 if (parent->child_idx == 0) {
557 parent->child_idx = new_node_idx;
559 struct trie_node *last_child;
561 last_child = &rules->trie_nodes[parent->last_child_idx];
562 last_child->next_child_idx = new_node_idx;
564 parent->last_child_idx = new_node_idx;
568 static int add_token(struct udev_rules *rules, struct token *token)
570 /* grow buffer if needed */
571 if (rules->token_cur+1 >= rules->token_max) {
572 struct token *tokens;
575 /* double the buffer size */
576 add = rules->token_max;
580 tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
583 rules->tokens = tokens;
584 rules->token_max += add;
586 memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
591 static uid_t add_uid(struct udev_rules *rules, const char *owner)
597 /* lookup, if we know it already */
598 for (i = 0; i < rules->uids_cur; i++) {
599 off = rules->uids[i].name_off;
600 if (streq(&rules->buf[off], owner)) {
601 uid = rules->uids[i].uid;
605 uid = util_lookup_user(rules->udev, owner);
607 /* grow buffer if needed */
608 if (rules->uids_cur+1 >= rules->uids_max) {
609 struct uid_gid *uids;
612 /* double the buffer size */
613 add = rules->uids_max;
617 uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
621 rules->uids_max += add;
623 rules->uids[rules->uids_cur].uid = uid;
624 off = add_string(rules, owner);
627 rules->uids[rules->uids_cur].name_off = off;
632 static gid_t add_gid(struct udev_rules *rules, const char *group)
638 /* lookup, if we know it already */
639 for (i = 0; i < rules->gids_cur; i++) {
640 off = rules->gids[i].name_off;
641 if (streq(&rules->buf[off], group)) {
642 gid = rules->gids[i].gid;
646 gid = util_lookup_group(rules->udev, group);
648 /* grow buffer if needed */
649 if (rules->gids_cur+1 >= rules->gids_max) {
650 struct uid_gid *gids;
653 /* double the buffer size */
654 add = rules->gids_max;
658 gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid));
662 rules->gids_max += add;
664 rules->gids[rules->gids_cur].gid = gid;
665 off = add_string(rules, group);
668 rules->gids[rules->gids_cur].name_off = off;
673 static int import_property_from_string(struct udev_device *dev, char *line)
681 while (isspace(key[0]))
684 /* comment or empty line */
685 if (key[0] == '#' || key[0] == '\0')
688 /* split key/value */
689 val = strchr(key, '=');
696 while (isspace(val[0]))
703 while (isspace(key[len-1]))
707 /* terminate value */
711 while (isspace(val[len-1]))
719 if (val[0] == '"' || val[0] == '\'') {
720 if (val[len-1] != val[0]) {
721 log_debug("inconsistent quoting: '%s', skip\n", line);
728 /* handle device, renamed by external tool, returning new path */
729 if (streq(key, "DEVPATH")) {
730 char syspath[UTIL_PATH_SIZE];
732 log_debug("updating devpath from '%s' to '%s'\n",
733 udev_device_get_devpath(dev), val);
734 util_strscpyl(syspath, sizeof(syspath), "/sys", val, NULL);
735 udev_device_set_syspath(dev, syspath);
737 struct udev_list_entry *entry;
739 entry = udev_device_add_property(dev, key, val);
740 /* store in db, skip private keys */
742 udev_list_entry_set_num(entry, true);
747 static int import_file_into_properties(struct udev_device *dev, const char *filename)
750 char line[UTIL_LINE_SIZE];
752 f = fopen(filename, "r");
755 while (fgets(line, sizeof(line), f) != NULL)
756 import_property_from_string(dev, line);
761 static int import_program_into_properties(struct udev_event *event, const char *program, const sigset_t *sigmask)
763 struct udev_device *dev = event->dev;
765 char result[UTIL_LINE_SIZE];
769 envp = udev_device_get_properties_envp(dev);
770 err = udev_event_spawn(event, program, envp, sigmask, result, sizeof(result));
775 while (line != NULL) {
778 pos = strchr(line, '\n');
783 import_property_from_string(dev, line);
789 static int import_parent_into_properties(struct udev_device *dev, const char *filter)
791 struct udev_device *dev_parent;
792 struct udev_list_entry *list_entry;
794 dev_parent = udev_device_get_parent(dev);
795 if (dev_parent == NULL)
798 udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
799 const char *key = udev_list_entry_get_name(list_entry);
800 const char *val = udev_list_entry_get_value(list_entry);
802 if (fnmatch(filter, key, 0) == 0) {
803 struct udev_list_entry *entry;
805 entry = udev_device_add_property(dev, key, val);
806 /* store in db, skip private keys */
808 udev_list_entry_set_num(entry, true);
814 #define WAIT_LOOP_PER_SECOND 50
815 static int wait_for_file(struct udev_device *dev, const char *file, int timeout)
817 char filepath[UTIL_PATH_SIZE];
818 char devicepath[UTIL_PATH_SIZE];
820 int loop = timeout * WAIT_LOOP_PER_SECOND;
822 /* a relative path is a device attribute */
823 devicepath[0] = '\0';
824 if (file[0] != '/') {
825 util_strscpyl(devicepath, sizeof(devicepath), udev_device_get_syspath(dev), NULL);
826 util_strscpyl(filepath, sizeof(filepath), devicepath, "/", file, NULL);
831 const struct timespec duration = { 0, 1000 * 1000 * 1000 / WAIT_LOOP_PER_SECOND };
834 if (stat(file, &stats) == 0) {
835 log_debug("file '%s' appeared after %i loops\n", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
838 /* make sure, the device did not disappear in the meantime */
839 if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
840 log_debug("device disappeared while waiting for '%s'\n", file);
843 log_debug("wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND);
844 nanosleep(&duration, NULL);
846 log_debug("waiting for '%s' failed\n", file);
850 static int attr_subst_subdir(char *attr, size_t len)
854 if (strstr(attr, "/*/")) {
856 char dirname[UTIL_PATH_SIZE];
860 util_strscpy(dirname, sizeof(dirname), attr);
861 pos = strstr(dirname, "/*/");
866 dir = opendir(dirname);
870 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
873 if (dent->d_name[0] == '.')
875 util_strscpyl(attr, len, dirname, "/", dent->d_name, tail, NULL);
876 if (stat(attr, &stats) == 0) {
888 static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value)
894 if (linepos == NULL || linepos[0] == '\0')
897 /* skip whitespace */
898 while (isspace(linepos[0]) || linepos[0] == ',')
902 if (linepos[0] == '\0')
908 if (linepos[0] == '\0')
910 if (isspace(linepos[0]))
912 if (linepos[0] == '=')
914 if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
915 if (linepos[1] == '=')
919 /* remember end of key */
922 /* skip whitespace after key */
923 while (isspace(linepos[0]))
925 if (linepos[0] == '\0')
928 /* get operation type */
929 if (linepos[0] == '=' && linepos[1] == '=') {
932 } else if (linepos[0] == '!' && linepos[1] == '=') {
935 } else if (linepos[0] == '+' && linepos[1] == '=') {
938 } else if (linepos[0] == '=') {
941 } else if (linepos[0] == ':' && linepos[1] == '=') {
942 *op = OP_ASSIGN_FINAL;
950 /* skip whitespace after operator */
951 while (isspace(linepos[0]))
953 if (linepos[0] == '\0')
957 if (linepos[0] == '"')
964 temp = strchr(linepos, '"');
970 /* move line to next key */
975 /* extract possible KEY{attr} */
976 static const char *get_key_attribute(struct udev *udev, char *str)
981 attr = strchr(str, '{');
984 pos = strchr(attr, '}');
986 log_error("missing closing brace for format\n");
995 static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
996 enum operation_type op,
997 const char *value, const void *data)
999 struct token *token = &rule_tmp->token[rule_tmp->token_cur];
1000 const char *attr = NULL;
1002 memset(token, 0x00, sizeof(struct token));
1008 case TK_M_SUBSYSTEM:
1014 case TK_M_SUBSYSTEMS:
1018 case TK_M_IMPORT_FILE:
1019 case TK_M_IMPORT_PROG:
1020 case TK_M_IMPORT_DB:
1021 case TK_M_IMPORT_CMDLINE:
1022 case TK_M_IMPORT_PARENT:
1031 token->key.value_off = add_string(rule_tmp->rules, value);
1033 case TK_M_IMPORT_BUILTIN:
1034 token->key.value_off = add_string(rule_tmp->rules, value);
1035 token->key.builtin_cmd = *(enum udev_builtin_cmd *)data;
1043 token->key.value_off = add_string(rule_tmp->rules, value);
1044 token->key.attr_off = add_string(rule_tmp->rules, attr);
1047 token->key.value_off = add_string(rule_tmp->rules, value);
1048 token->key.devlink_unique = *(int *)data;
1051 token->key.value_off = add_string(rule_tmp->rules, value);
1053 token->key.mode = *(mode_t *)data;
1055 case TK_A_STRING_ESCAPE_NONE:
1056 case TK_A_STRING_ESCAPE_REPLACE:
1057 case TK_A_DB_PERSIST:
1059 case TK_A_RUN_BUILTIN:
1060 case TK_A_RUN_PROGRAM:
1061 token->key.builtin_cmd = *(enum udev_builtin_cmd *)data;
1062 token->key.value_off = add_string(rule_tmp->rules, value);
1064 case TK_A_INOTIFY_WATCH:
1065 case TK_A_DEVLINK_PRIO:
1066 token->key.devlink_prio = *(int *)data;
1069 token->key.uid = *(uid_t *)data;
1072 token->key.gid = *(gid_t *)data;
1075 token->key.mode = *(mode_t *)data;
1077 case TK_A_STATIC_NODE:
1078 token->key.value_off = add_string(rule_tmp->rules, value);
1080 case TK_M_EVENT_TIMEOUT:
1081 token->key.event_timeout = *(int *)data;
1084 case TK_M_PARENTS_MIN:
1085 case TK_M_PARENTS_MAX:
1089 log_error("wrong type %u\n", type);
1093 if (value != NULL && type < TK_M_MAX) {
1094 /* check if we need to split or call fnmatch() while matching rules */
1095 enum string_glob_type glob;
1099 has_split = (strchr(value, '|') != NULL);
1100 has_glob = (strchr(value, '*') != NULL || strchr(value, '?') != NULL || strchr(value, '[') != NULL);
1101 if (has_split && has_glob) {
1102 glob = GL_SPLIT_GLOB;
1103 } else if (has_split) {
1105 } else if (has_glob) {
1106 if (streq(value, "?*"))
1107 glob = GL_SOMETHING;
1113 token->key.glob = glob;
1116 if (value != NULL && type > TK_M_MAX) {
1117 /* check if assigned value has substitution chars */
1118 if (value[0] == '[')
1119 token->key.subst = SB_SUBSYS;
1120 else if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
1121 token->key.subst = SB_FORMAT;
1123 token->key.subst = SB_NONE;
1127 /* check if property/attribut name has substitution chars */
1129 token->key.attrsubst = SB_SUBSYS;
1130 else if (strchr(attr, '%') != NULL || strchr(attr, '$') != NULL)
1131 token->key.attrsubst = SB_FORMAT;
1133 token->key.attrsubst = SB_NONE;
1136 token->key.type = type;
1138 rule_tmp->token_cur++;
1139 if (rule_tmp->token_cur >= ELEMENTSOF(rule_tmp->token)) {
1140 log_error("temporary rule array too small\n");
1146 static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp)
1149 unsigned int start = 0;
1150 unsigned int end = rule_tmp->token_cur;
1152 for (i = 0; i < rule_tmp->token_cur; i++) {
1153 enum token_type next_val = TK_UNSET;
1154 unsigned int next_idx = 0;
1157 /* find smallest value */
1158 for (j = start; j < end; j++) {
1159 if (rule_tmp->token[j].type == TK_UNSET)
1161 if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
1162 next_val = rule_tmp->token[j].type;
1167 /* add token and mark done */
1168 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
1170 rule_tmp->token[next_idx].type = TK_UNSET;
1173 if (next_idx == start)
1175 if (next_idx+1 == end)
1181 static int add_rule(struct udev_rules *rules, char *line,
1182 const char *filename, unsigned int filename_off, unsigned int lineno)
1186 struct rule_tmp rule_tmp;
1188 memset(&rule_tmp, 0x00, sizeof(struct rule_tmp));
1189 rule_tmp.rules = rules;
1190 rule_tmp.rule.type = TK_RULE;
1191 rule_tmp.rule.rule.filename_off = filename_off;
1192 rule_tmp.rule.rule.filename_line = lineno;
1198 enum operation_type op;
1200 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0)
1203 if (streq(key, "ACTION")) {
1204 if (op > OP_MATCH_MAX) {
1205 log_error("invalid ACTION operation\n");
1208 rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL);
1212 if (streq(key, "DEVPATH")) {
1213 if (op > OP_MATCH_MAX) {
1214 log_error("invalid DEVPATH operation\n");
1217 rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
1221 if (streq(key, "KERNEL")) {
1222 if (op > OP_MATCH_MAX) {
1223 log_error("invalid KERNEL operation\n");
1226 rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL);
1230 if (streq(key, "SUBSYSTEM")) {
1231 if (op > OP_MATCH_MAX) {
1232 log_error("invalid SUBSYSTEM operation\n");
1235 /* bus, class, subsystem events should all be the same */
1236 if (streq(value, "subsystem") ||
1237 streq(value, "bus") ||
1238 streq(value, "class")) {
1239 if (streq(value, "bus") || streq(value, "class"))
1240 log_error("'%s' must be specified as 'subsystem' \n"
1241 "please fix it in %s:%u", value, filename, lineno);
1242 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
1244 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
1248 if (streq(key, "DRIVER")) {
1249 if (op > OP_MATCH_MAX) {
1250 log_error("invalid DRIVER operation\n");
1253 rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL);
1257 if (startswith(key, "ATTR{")) {
1258 attr = get_key_attribute(rules->udev, key + sizeof("ATTR")-1);
1260 log_error("error parsing ATTR attribute\n");
1263 if (op < OP_MATCH_MAX) {
1264 rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
1266 rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr);
1271 if (streq(key, "KERNELS")) {
1272 if (op > OP_MATCH_MAX) {
1273 log_error("invalid KERNELS operation\n");
1276 rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1280 if (streq(key, "SUBSYSTEMS")) {
1281 if (op > OP_MATCH_MAX) {
1282 log_error("invalid SUBSYSTEMS operation\n");
1285 rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1289 if (streq(key, "DRIVERS")) {
1290 if (op > OP_MATCH_MAX) {
1291 log_error("invalid DRIVERS operation\n");
1294 rule_add_key(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
1298 if (startswith(key, "ATTRS{")) {
1299 if (op > OP_MATCH_MAX) {
1300 log_error("invalid ATTRS operation\n");
1303 attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
1305 log_error("error parsing ATTRS attribute\n");
1308 if (startswith(attr, "device/"))
1309 log_error("the 'device' link may not be available in a future kernel, "
1310 "please fix it in %s:%u", filename, lineno);
1311 else if (strstr(attr, "../") != NULL)
1312 log_error("do not reference parent sysfs directories directly, "
1313 "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
1314 rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1318 if (streq(key, "TAGS")) {
1319 if (op > OP_MATCH_MAX) {
1320 log_error("invalid TAGS operation\n");
1323 rule_add_key(&rule_tmp, TK_M_TAGS, op, value, NULL);
1327 if (startswith(key, "ENV{")) {
1328 attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1);
1330 log_error("error parsing ENV attribute\n");
1333 if (op < OP_MATCH_MAX) {
1334 if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
1337 static const char *blacklist[] = {
1352 for (i = 0; i < ELEMENTSOF(blacklist); i++) {
1353 if (!streq(attr, blacklist[i]))
1355 log_error("invalid ENV attribute, '%s' can not be set %s:%u\n", attr, filename, lineno);
1358 if (rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
1364 if (streq(key, "TAG")) {
1365 if (op < OP_MATCH_MAX)
1366 rule_add_key(&rule_tmp, TK_M_TAG, op, value, NULL);
1368 rule_add_key(&rule_tmp, TK_A_TAG, op, value, NULL);
1372 if (streq(key, "PROGRAM")) {
1373 rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
1377 if (streq(key, "RESULT")) {
1378 if (op > OP_MATCH_MAX) {
1379 log_error("invalid RESULT operation\n");
1382 rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL);
1386 if (startswith(key, "IMPORT")) {
1387 attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1);
1389 log_error("IMPORT{} type missing, ignoring IMPORT %s:%u\n", filename, lineno);
1392 if (streq(attr, "program")) {
1393 /* find known built-in command */
1394 if (value[0] != '/') {
1395 enum udev_builtin_cmd cmd;
1397 cmd = udev_builtin_lookup(value);
1398 if (cmd < UDEV_BUILTIN_MAX) {
1399 log_debug("IMPORT found builtin '%s', replacing %s:%u\n",
1400 value, filename, lineno);
1401 rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, value, &cmd);
1405 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1406 } else if (streq(attr, "builtin")) {
1407 enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
1409 if (cmd < UDEV_BUILTIN_MAX)
1410 rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, value, &cmd);
1412 log_error("IMPORT{builtin}: '%s' unknown %s:%u\n", value, filename, lineno);
1413 } else if (streq(attr, "file")) {
1414 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1415 } else if (streq(attr, "db")) {
1416 rule_add_key(&rule_tmp, TK_M_IMPORT_DB, op, value, NULL);
1417 } else if (streq(attr, "cmdline")) {
1418 rule_add_key(&rule_tmp, TK_M_IMPORT_CMDLINE, op, value, NULL);
1419 } else if (streq(attr, "parent")) {
1420 rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
1422 log_error("IMPORT{} unknown type, ignoring IMPORT %s:%u\n", filename, lineno);
1426 if (startswith(key, "TEST")) {
1429 if (op > OP_MATCH_MAX) {
1430 log_error("invalid TEST operation\n");
1433 attr = get_key_attribute(rules->udev, key + sizeof("TEST")-1);
1435 mode = strtol(attr, NULL, 8);
1436 rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode);
1438 rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL);
1443 if (startswith(key, "RUN")) {
1444 attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1);
1448 if (streq(attr, "builtin")) {
1449 enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
1451 if (cmd < UDEV_BUILTIN_MAX)
1452 rule_add_key(&rule_tmp, TK_A_RUN_BUILTIN, op, value, &cmd);
1454 log_error("IMPORT{builtin}: '%s' unknown %s:%u\n", value, filename, lineno);
1455 } else if (streq(attr, "program")) {
1456 enum udev_builtin_cmd cmd = UDEV_BUILTIN_MAX;
1458 rule_add_key(&rule_tmp, TK_A_RUN_PROGRAM, op, value, &cmd);
1460 log_error("RUN{} unknown type, ignoring RUN %s:%u\n", filename, lineno);
1466 if (streq(key, "WAIT_FOR") || streq(key, "WAIT_FOR_SYSFS")) {
1467 rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1471 if (streq(key, "LABEL")) {
1472 rule_tmp.rule.rule.label_off = add_string(rules, value);
1476 if (streq(key, "GOTO")) {
1477 rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1481 if (startswith(key, "NAME")) {
1482 if (op < OP_MATCH_MAX) {
1483 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
1485 if (streq(value, "%k")) {
1486 log_error("NAME=\"%%k\" is ignored, because it breaks kernel supplied names, "
1487 "please remove it from %s:%u\n", filename, lineno);
1490 if (value[0] == '\0') {
1491 log_debug("NAME=\"\" is ignored, because udev will not delete any device nodes, "
1492 "please remove it from %s:%u\n", filename, lineno);
1495 rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL);
1497 rule_tmp.rule.rule.can_set_name = true;
1501 if (startswith(key, "SYMLINK")) {
1502 if (op < OP_MATCH_MAX) {
1503 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
1507 attr = get_key_attribute(rules->udev, key + sizeof("SYMLINK")-1);
1508 if (attr != NULL && strstr(attr, "unique") != NULL)
1510 rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, &flag);
1512 rule_tmp.rule.rule.can_set_name = true;
1516 if (streq(key, "OWNER")) {
1520 uid = strtoul(value, &endptr, 10);
1521 if (endptr[0] == '\0') {
1522 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1523 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1524 uid = add_uid(rules, value);
1525 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1526 } else if (rules->resolve_names >= 0) {
1527 rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
1529 rule_tmp.rule.rule.can_set_name = true;
1533 if (streq(key, "GROUP")) {
1537 gid = strtoul(value, &endptr, 10);
1538 if (endptr[0] == '\0') {
1539 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1540 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1541 gid = add_gid(rules, value);
1542 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1543 } else if (rules->resolve_names >= 0) {
1544 rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
1546 rule_tmp.rule.rule.can_set_name = true;
1550 if (streq(key, "MODE")) {
1554 mode = strtol(value, &endptr, 8);
1555 if (endptr[0] == '\0')
1556 rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1558 rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
1559 rule_tmp.rule.rule.can_set_name = true;
1563 if (streq(key, "OPTIONS")) {
1566 pos = strstr(value, "link_priority=");
1568 int prio = atoi(&pos[strlen("link_priority=")]);
1570 rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, op, NULL, &prio);
1573 pos = strstr(value, "event_timeout=");
1575 int tout = atoi(&pos[strlen("event_timeout=")]);
1577 rule_add_key(&rule_tmp, TK_M_EVENT_TIMEOUT, op, NULL, &tout);
1580 pos = strstr(value, "string_escape=");
1582 pos = &pos[strlen("string_escape=")];
1583 if (startswith(pos, "none"))
1584 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, op, NULL, NULL);
1585 else if (startswith(pos, "replace"))
1586 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, op, NULL, NULL);
1589 pos = strstr(value, "db_persist");
1591 rule_add_key(&rule_tmp, TK_A_DB_PERSIST, op, NULL, NULL);
1593 pos = strstr(value, "nowatch");
1597 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &off);
1599 pos = strstr(value, "watch");
1603 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &on);
1607 pos = strstr(value, "static_node=");
1609 rule_add_key(&rule_tmp, TK_A_STATIC_NODE, op, &pos[strlen("static_node=")], NULL);
1610 rule_tmp.rule.rule.has_static_node = true;
1616 log_error("unknown key '%s' in %s:%u\n", key, filename, lineno);
1620 /* add rule token */
1621 rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur;
1622 if (add_token(rules, &rule_tmp.rule) != 0)
1625 /* add tokens to list, sorted by type */
1626 if (sort_token(rules, &rule_tmp) != 0)
1631 log_error("invalid rule '%s:%u'\n", filename, lineno);
1635 static int parse_file(struct udev_rules *rules, const char *filename, unsigned short filename_off)
1638 unsigned int first_token;
1639 char line[UTIL_LINE_SIZE];
1643 log_debug("reading '%s' as rules file\n", filename);
1645 f = fopen(filename, "r");
1649 first_token = rules->token_cur;
1651 while (fgets(line, sizeof(line), f) != NULL) {
1655 /* skip whitespace */
1658 while (isspace(key[0]))
1669 /* continue reading if backslash+newline is found */
1670 while (line[len-2] == '\\') {
1671 if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1673 if (strlen(&line[len-2]) < 2)
1679 if (len+1 >= sizeof(line)) {
1680 log_error("line too long '%s':%u, ignored\n", filename, line_nr);
1683 add_rule(rules, key, filename, filename_off, line_nr);
1687 /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1688 for (i = first_token+1; i < rules->token_cur; i++) {
1689 if (rules->tokens[i].type == TK_A_GOTO) {
1690 char *label = &rules->buf[rules->tokens[i].key.value_off];
1693 for (j = i+1; j < rules->token_cur; j++) {
1694 if (rules->tokens[j].type != TK_RULE)
1696 if (rules->tokens[j].rule.label_off == 0)
1698 if (!streq(label, &rules->buf[rules->tokens[j].rule.label_off]))
1700 rules->tokens[i].key.rule_goto = j;
1703 if (rules->tokens[i].key.rule_goto == 0)
1704 log_error("GOTO '%s' has no matching label in: '%s'\n", label, filename);
1710 static int add_matching_files(struct udev *udev, struct udev_list *file_list, const char *dirname, const char *suffix)
1713 struct dirent *dent;
1714 char filename[UTIL_PATH_SIZE];
1716 dir = opendir(dirname);
1718 log_debug("unable to open '%s': %m\n", dirname);
1722 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
1723 if (dent->d_name[0] == '.')
1726 /* look for file matching with specified suffix */
1727 if (suffix != NULL) {
1730 ext = strrchr(dent->d_name, '.');
1733 if (!streq(ext, suffix))
1736 util_strscpyl(filename, sizeof(filename), dirname, "/", dent->d_name, NULL);
1738 * the basename is the key, the filename the value
1739 * identical basenames from different directories override each other
1740 * entries are sorted after basename
1742 udev_list_entry_add(file_list, dent->d_name, filename);
1749 struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
1751 struct udev_rules *rules;
1752 struct udev_list file_list;
1753 struct udev_list_entry *file_loop;
1754 struct token end_token;
1757 rules = calloc(1, sizeof(struct udev_rules));
1761 rules->resolve_names = resolve_names;
1762 udev_list_init(udev, &file_list, true);
1764 /* init token array and string buffer */
1765 rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
1766 if (rules->tokens == NULL) {
1770 rules->token_max = PREALLOC_TOKEN;
1772 rules->buf = malloc(PREALLOC_STRBUF);
1773 if (rules->buf == NULL) {
1774 free(rules->tokens);
1778 rules->buf_max = PREALLOC_STRBUF;
1779 /* offset 0 is always '\0' */
1780 rules->buf[0] = '\0';
1783 rules->trie_nodes = malloc(PREALLOC_TRIE * sizeof(struct trie_node));
1784 if (rules->trie_nodes == NULL) {
1786 free(rules->tokens);
1790 rules->trie_nodes_max = PREALLOC_TRIE;
1791 /* offset 0 is the trie root, with an empty string */
1792 memset(rules->trie_nodes, 0x00, sizeof(struct trie_node));
1793 rules->trie_nodes_cur = 1;
1795 for (i = 0; i < ELEMENTSOF(rules_dirs); i++)
1796 add_matching_files(udev, &file_list, rules_dirs[i], ".rules");
1798 /* add all filenames to the string buffer */
1799 udev_list_entry_foreach(file_loop, udev_list_get_entry(&file_list)) {
1800 const char *filename = udev_list_entry_get_value(file_loop);
1801 unsigned int filename_off;
1803 filename_off = add_string(rules, filename);
1804 /* the offset in the rule is limited to unsigned short */
1805 if (filename_off < USHRT_MAX)
1806 udev_list_entry_set_num(file_loop, filename_off);
1809 /* parse all rules files */
1810 udev_list_entry_foreach(file_loop, udev_list_get_entry(&file_list)) {
1811 const char *filename = udev_list_entry_get_value(file_loop);
1812 unsigned int filename_off = udev_list_entry_get_num(file_loop);
1815 if (stat(filename, &st) != 0) {
1816 log_error("can not find '%s': %m\n", filename);
1819 if (S_ISREG(st.st_mode) && st.st_size <= 0) {
1820 log_debug("ignore empty '%s'\n", filename);
1823 if (S_ISCHR(st.st_mode)) {
1824 log_debug("ignore masked '%s'\n", filename);
1827 parse_file(rules, filename, filename_off);
1829 udev_list_cleanup(&file_list);
1831 memset(&end_token, 0x00, sizeof(struct token));
1832 end_token.type = TK_END;
1833 add_token(rules, &end_token);
1835 /* shrink allocated token and string buffer */
1836 if (rules->token_cur < rules->token_max) {
1837 struct token *tokens;
1839 tokens = realloc(rules->tokens, rules->token_cur * sizeof(struct token));
1840 if (tokens != NULL || rules->token_cur == 0) {
1841 rules->tokens = tokens;
1842 rules->token_max = rules->token_cur;
1845 if (rules->buf_cur < rules->buf_max) {
1848 buf = realloc(rules->buf, rules->buf_cur);
1849 if (buf != NULL || rules->buf_cur == 0) {
1851 rules->buf_max = rules->buf_cur;
1854 log_debug("rules use %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1855 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1856 log_debug("temporary index used %zu bytes (%u * %zu bytes)\n",
1857 rules->trie_nodes_cur * sizeof(struct trie_node),
1858 rules->trie_nodes_cur, sizeof(struct trie_node));
1861 free(rules->trie_nodes);
1862 rules->trie_nodes = NULL;
1863 rules->trie_nodes_cur = 0;
1864 rules->trie_nodes_max = 0;
1866 /* cleanup uid/gid cache */
1869 rules->uids_cur = 0;
1870 rules->uids_max = 0;
1873 rules->gids_cur = 0;
1874 rules->gids_max = 0;
1880 struct udev_rules *udev_rules_unref(struct udev_rules *rules)
1884 free(rules->tokens);
1886 free(rules->trie_nodes);
1893 bool udev_rules_check_timestamp(struct udev_rules *rules)
1896 bool changed = false;
1898 for (i = 0; i < ELEMENTSOF(rules_dirs); i++) {
1901 if (stat(rules_dirs[i], &stats) < 0)
1904 if (rules->dirs_ts_usec[i] == ts_usec(&stats.st_mtim))
1908 if (rules->dirs_ts_usec[i] != 0) {
1909 log_debug("reload - timestamp of '%s' changed\n", rules_dirs[i]);
1913 /* update timestamp */
1914 rules->dirs_ts_usec[i] = ts_usec(&stats.st_mtim);
1920 static int match_key(struct udev_rules *rules, struct token *token, const char *val)
1922 char *key_value = &rules->buf[token->key.value_off];
1929 switch (token->key.glob) {
1931 match = (streq(key_value, val));
1934 match = (fnmatch(key_value, val, 0) == 0);
1941 s = &rules->buf[token->key.value_off];
1946 next = strchr(s, '|');
1948 size_t matchlen = (size_t)(next - s);
1950 match = (matchlen == len && strncmp(s, val, matchlen) == 0);
1954 match = (streq(s, val));
1963 char value[UTIL_PATH_SIZE];
1965 util_strscpy(value, sizeof(value), &rules->buf[token->key.value_off]);
1967 while (key_value != NULL) {
1968 pos = strchr(key_value, '|');
1973 match = (fnmatch(key_value, val, 0) == 0);
1981 match = (val[0] != '\0');
1987 if (match && (token->key.op == OP_MATCH))
1989 if (!match && (token->key.op == OP_NOMATCH))
1994 static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur)
1997 char nbuf[UTIL_NAME_SIZE];
1999 char vbuf[UTIL_NAME_SIZE];
2002 name = &rules->buf[cur->key.attr_off];
2003 switch (cur->key.attrsubst) {
2005 udev_event_apply_format(event, name, nbuf, sizeof(nbuf));
2009 value = udev_device_get_sysattr_value(dev, name);
2014 if (util_resolve_subsys_kernel(event->udev, name, vbuf, sizeof(vbuf), 1) != 0)
2022 /* remove trailing whitespace, if not asked to match for it */
2023 len = strlen(value);
2024 if (len > 0 && isspace(value[len-1])) {
2025 const char *key_value;
2028 key_value = &rules->buf[cur->key.value_off];
2029 klen = strlen(key_value);
2030 if (klen > 0 && !isspace(key_value[klen-1])) {
2031 if (value != vbuf) {
2032 util_strscpy(vbuf, sizeof(vbuf), value);
2035 while (len > 0 && isspace(vbuf[--len]))
2040 return match_key(rules, cur, value);
2049 int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event, const sigset_t *sigmask)
2053 enum escape_type esc = ESCAPE_UNSET;
2056 if (rules->tokens == NULL)
2059 can_set_name = ((!streq(udev_device_get_action(event->dev), "remove")) &&
2060 (major(udev_device_get_devnum(event->dev)) > 0 ||
2061 udev_device_get_ifindex(event->dev) > 0));
2063 /* loop through token list, match, run actions or forward to next rule */
2064 cur = &rules->tokens[0];
2067 dump_token(rules, cur);
2068 switch (cur->type) {
2072 /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
2073 if (!can_set_name && rule->rule.can_set_name)
2078 if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
2082 if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
2086 if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
2089 case TK_M_DEVLINK: {
2090 struct udev_list_entry *list_entry;
2093 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
2094 const char *devlink;
2096 devlink = udev_list_entry_get_name(list_entry) + strlen(TEST_PREFIX "/dev/");
2097 if (match_key(rules, cur, devlink) == 0) {
2107 if (match_key(rules, cur, event->name) != 0)
2111 const char *key_name = &rules->buf[cur->key.attr_off];
2114 value = udev_device_get_property_value(event->dev, key_name);
2117 if (match_key(rules, cur, value))
2122 struct udev_list_entry *list_entry;
2125 udev_list_entry_foreach(list_entry, udev_device_get_tags_list_entry(event->dev)) {
2126 if (streq(&rules->buf[cur->key.value_off], udev_list_entry_get_name(list_entry))) {
2131 if (!match && (cur->key.op != OP_NOMATCH))
2135 case TK_M_SUBSYSTEM:
2136 if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
2140 if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
2143 case TK_M_WAITFOR: {
2144 char filename[UTIL_PATH_SIZE];
2147 udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename));
2148 found = (wait_for_file(event->dev, filename, 10) == 0);
2149 if (!found && (cur->key.op != OP_NOMATCH))
2154 if (match_attr(rules, event->dev, event, cur) != 0)
2158 case TK_M_SUBSYSTEMS:
2164 /* get whole sequence of parent matches */
2166 while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX)
2169 /* loop over parents */
2170 event->dev_parent = event->dev;
2174 /* loop over sequence of parent match keys */
2175 for (key = cur; key < next; key++ ) {
2176 dump_token(rules, key);
2179 if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
2182 case TK_M_SUBSYSTEMS:
2183 if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
2187 if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
2191 if (match_attr(rules, event->dev_parent, event, key) != 0)
2195 bool match = udev_device_has_tag(event->dev_parent, &rules->buf[cur->key.value_off]);
2197 if (match && key->key.op == OP_NOMATCH)
2199 if (!match && key->key.op == OP_MATCH)
2210 event->dev_parent = udev_device_get_parent(event->dev_parent);
2211 if (event->dev_parent == NULL)
2214 /* move behind our sequence of parent match keys */
2219 char filename[UTIL_PATH_SIZE];
2220 struct stat statbuf;
2223 udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename));
2224 if (util_resolve_subsys_kernel(event->udev, filename, filename, sizeof(filename), 0) != 0) {
2225 if (filename[0] != '/') {
2226 char tmp[UTIL_PATH_SIZE];
2228 util_strscpy(tmp, sizeof(tmp), filename);
2229 util_strscpyl(filename, sizeof(filename),
2230 udev_device_get_syspath(event->dev), "/", tmp, NULL);
2233 attr_subst_subdir(filename, sizeof(filename));
2235 match = (stat(filename, &statbuf) == 0);
2236 if (match && cur->key.mode > 0)
2237 match = ((statbuf.st_mode & cur->key.mode) > 0);
2238 if (match && cur->key.op == OP_NOMATCH)
2240 if (!match && cur->key.op == OP_MATCH)
2244 case TK_M_EVENT_TIMEOUT:
2245 log_debug("OPTIONS event_timeout=%u\n", cur->key.event_timeout);
2246 event->timeout_usec = cur->key.event_timeout * 1000 * 1000;
2248 case TK_M_PROGRAM: {
2249 char program[UTIL_PATH_SIZE];
2251 char result[UTIL_PATH_SIZE];
2253 free(event->program_result);
2254 event->program_result = NULL;
2255 udev_event_apply_format(event, &rules->buf[cur->key.value_off], program, sizeof(program));
2256 envp = udev_device_get_properties_envp(event->dev);
2257 log_debug("PROGRAM '%s' %s:%u\n",
2259 &rules->buf[rule->rule.filename_off],
2260 rule->rule.filename_line);
2262 if (udev_event_spawn(event, program, envp, sigmask, result, sizeof(result)) < 0) {
2263 if (cur->key.op != OP_NOMATCH)
2268 util_remove_trailing_chars(result, '\n');
2269 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2270 count = util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
2272 log_debug("%i character(s) replaced\n" , count);
2274 event->program_result = strdup(result);
2275 if (cur->key.op == OP_NOMATCH)
2280 case TK_M_IMPORT_FILE: {
2281 char import[UTIL_PATH_SIZE];
2283 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2284 if (import_file_into_properties(event->dev, import) != 0)
2285 if (cur->key.op != OP_NOMATCH)
2289 case TK_M_IMPORT_PROG: {
2290 char import[UTIL_PATH_SIZE];
2292 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2293 log_debug("IMPORT '%s' %s:%u\n",
2295 &rules->buf[rule->rule.filename_off],
2296 rule->rule.filename_line);
2298 if (import_program_into_properties(event, import, sigmask) != 0)
2299 if (cur->key.op != OP_NOMATCH)
2303 case TK_M_IMPORT_BUILTIN: {
2304 char command[UTIL_PATH_SIZE];
2306 if (udev_builtin_run_once(cur->key.builtin_cmd)) {
2307 /* check if we ran already */
2308 if (event->builtin_run & (1 << cur->key.builtin_cmd)) {
2309 log_debug("IMPORT builtin skip '%s' %s:%u\n",
2310 udev_builtin_name(cur->key.builtin_cmd),
2311 &rules->buf[rule->rule.filename_off],
2312 rule->rule.filename_line);
2313 /* return the result from earlier run */
2314 if (event->builtin_ret & (1 << cur->key.builtin_cmd))
2315 if (cur->key.op != OP_NOMATCH)
2320 event->builtin_run |= (1 << cur->key.builtin_cmd);
2323 udev_event_apply_format(event, &rules->buf[cur->key.value_off], command, sizeof(command));
2324 log_debug("IMPORT builtin '%s' %s:%u\n",
2325 udev_builtin_name(cur->key.builtin_cmd),
2326 &rules->buf[rule->rule.filename_off],
2327 rule->rule.filename_line);
2329 if (udev_builtin_run(event->dev, cur->key.builtin_cmd, command, false) != 0) {
2330 /* remember failure */
2331 log_debug("IMPORT builtin '%s' returned non-zero\n",
2332 udev_builtin_name(cur->key.builtin_cmd));
2333 event->builtin_ret |= (1 << cur->key.builtin_cmd);
2334 if (cur->key.op != OP_NOMATCH)
2339 case TK_M_IMPORT_DB: {
2340 const char *key = &rules->buf[cur->key.value_off];
2343 value = udev_device_get_property_value(event->dev_db, key);
2344 if (value != NULL) {
2345 struct udev_list_entry *entry;
2347 entry = udev_device_add_property(event->dev, key, value);
2348 udev_list_entry_set_num(entry, true);
2350 if (cur->key.op != OP_NOMATCH)
2355 case TK_M_IMPORT_CMDLINE: {
2357 bool imported = false;
2359 f = fopen("/proc/cmdline", "r");
2363 if (fgets(cmdline, sizeof(cmdline), f) != NULL) {
2364 const char *key = &rules->buf[cur->key.value_off];
2367 pos = strstr(cmdline, key);
2369 struct udev_list_entry *entry;
2372 if (pos[0] == '\0' || isspace(pos[0])) {
2373 /* we import simple flags as 'FLAG=1' */
2374 entry = udev_device_add_property(event->dev, key, "1");
2375 udev_list_entry_set_num(entry, true);
2377 } else if (pos[0] == '=') {
2382 while (pos[0] != '\0' && !isspace(pos[0]))
2385 entry = udev_device_add_property(event->dev, key, value);
2386 udev_list_entry_set_num(entry, true);
2393 if (!imported && cur->key.op != OP_NOMATCH)
2397 case TK_M_IMPORT_PARENT: {
2398 char import[UTIL_PATH_SIZE];
2400 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2401 if (import_parent_into_properties(event->dev, import) != 0)
2402 if (cur->key.op != OP_NOMATCH)
2407 if (match_key(rules, cur, event->program_result) != 0)
2410 case TK_A_STRING_ESCAPE_NONE:
2413 case TK_A_STRING_ESCAPE_REPLACE:
2414 esc = ESCAPE_REPLACE;
2416 case TK_A_DB_PERSIST:
2417 udev_device_set_db_persist(event->dev);
2419 case TK_A_INOTIFY_WATCH:
2420 if (event->inotify_watch_final)
2422 if (cur->key.op == OP_ASSIGN_FINAL)
2423 event->inotify_watch_final = true;
2424 event->inotify_watch = cur->key.watch;
2426 case TK_A_DEVLINK_PRIO:
2427 udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
2430 char owner[UTIL_NAME_SIZE];
2432 if (event->owner_final)
2434 if (cur->key.op == OP_ASSIGN_FINAL)
2435 event->owner_final = true;
2436 udev_event_apply_format(event, &rules->buf[cur->key.value_off], owner, sizeof(owner));
2437 event->uid = util_lookup_user(event->udev, owner);
2438 log_debug("OWNER %u %s:%u\n",
2440 &rules->buf[rule->rule.filename_off],
2441 rule->rule.filename_line);
2445 char group[UTIL_NAME_SIZE];
2447 if (event->group_final)
2449 if (cur->key.op == OP_ASSIGN_FINAL)
2450 event->group_final = true;
2451 udev_event_apply_format(event, &rules->buf[cur->key.value_off], group, sizeof(group));
2452 event->gid = util_lookup_group(event->udev, group);
2453 log_debug("GROUP %u %s:%u\n",
2455 &rules->buf[rule->rule.filename_off],
2456 rule->rule.filename_line);
2460 char mode_str[UTIL_NAME_SIZE];
2464 if (event->mode_final)
2466 udev_event_apply_format(event, &rules->buf[cur->key.value_off], mode_str, sizeof(mode_str));
2467 mode = strtol(mode_str, &endptr, 8);
2468 if (endptr[0] != '\0') {
2469 log_error("ignoring invalid mode '%s'\n", mode_str);
2472 if (cur->key.op == OP_ASSIGN_FINAL)
2473 event->mode_final = true;
2474 event->mode_set = true;
2476 log_debug("MODE %#o %s:%u\n",
2478 &rules->buf[rule->rule.filename_off],
2479 rule->rule.filename_line);
2483 if (event->owner_final)
2485 if (cur->key.op == OP_ASSIGN_FINAL)
2486 event->owner_final = true;
2487 event->uid = cur->key.uid;
2488 log_debug("OWNER %u %s:%u\n",
2490 &rules->buf[rule->rule.filename_off],
2491 rule->rule.filename_line);
2494 if (event->group_final)
2496 if (cur->key.op == OP_ASSIGN_FINAL)
2497 event->group_final = true;
2498 event->gid = cur->key.gid;
2499 log_debug("GROUP %u %s:%u\n",
2501 &rules->buf[rule->rule.filename_off],
2502 rule->rule.filename_line);
2505 if (event->mode_final)
2507 if (cur->key.op == OP_ASSIGN_FINAL)
2508 event->mode_final = true;
2509 event->mode_set = true;
2510 event->mode = cur->key.mode;
2511 log_debug("MODE %#o %s:%u\n",
2513 &rules->buf[rule->rule.filename_off],
2514 rule->rule.filename_line);
2517 const char *name = &rules->buf[cur->key.attr_off];
2518 char *value = &rules->buf[cur->key.value_off];
2520 if (value[0] != '\0') {
2521 char temp_value[UTIL_NAME_SIZE];
2522 struct udev_list_entry *entry;
2524 udev_event_apply_format(event, value, temp_value, sizeof(temp_value));
2525 entry = udev_device_add_property(event->dev, name, temp_value);
2526 /* store in db, skip private keys */
2528 udev_list_entry_set_num(entry, true);
2530 udev_device_add_property(event->dev, name, NULL);
2535 char tag[UTIL_PATH_SIZE];
2538 udev_event_apply_format(event, &rules->buf[cur->key.value_off], tag, sizeof(tag));
2539 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2540 udev_device_cleanup_tags_list(event->dev);
2541 for (p = tag; *p != '\0'; p++) {
2542 if ((*p >= 'a' && *p <= 'z') ||
2543 (*p >= 'A' && *p <= 'Z') ||
2544 (*p >= '0' && *p <= '9') ||
2545 *p == '-' || *p == '_')
2547 log_error("ignoring invalid tag name '%s'\n", tag);
2550 udev_device_add_tag(event->dev, tag);
2554 const char *name = &rules->buf[cur->key.value_off];
2556 char name_str[UTIL_PATH_SIZE];
2559 if (event->name_final)
2561 if (cur->key.op == OP_ASSIGN_FINAL)
2562 event->name_final = true;
2563 udev_event_apply_format(event, name, name_str, sizeof(name_str));
2564 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2565 count = util_replace_chars(name_str, "/");
2567 log_debug("%i character(s) replaced\n", count);
2569 if (major(udev_device_get_devnum(event->dev)) &&
2570 (!streq(name_str, udev_device_get_devnode(event->dev) + strlen(TEST_PREFIX "/dev/")))) {
2571 log_error("NAME=\"%s\" ignored, kernel device nodes "
2572 "can not be renamed; please fix it in %s:%u\n", name,
2573 &rules->buf[rule->rule.filename_off], rule->rule.filename_line);
2577 event->name = strdup(name_str);
2578 log_debug("NAME '%s' %s:%u\n",
2580 &rules->buf[rule->rule.filename_off],
2581 rule->rule.filename_line);
2584 case TK_A_DEVLINK: {
2585 char temp[UTIL_PATH_SIZE];
2586 char filename[UTIL_PATH_SIZE];
2590 if (event->devlink_final)
2592 if (major(udev_device_get_devnum(event->dev)) == 0)
2594 if (cur->key.op == OP_ASSIGN_FINAL)
2595 event->devlink_final = true;
2596 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2597 udev_device_cleanup_devlinks_list(event->dev);
2599 /* allow multiple symlinks separated by spaces */
2600 udev_event_apply_format(event, &rules->buf[cur->key.value_off], temp, sizeof(temp));
2601 if (esc == ESCAPE_UNSET)
2602 count = util_replace_chars(temp, "/ ");
2603 else if (esc == ESCAPE_REPLACE)
2604 count = util_replace_chars(temp, "/");
2606 log_debug("%i character(s) replaced\n" , count);
2608 while (isspace(pos[0]))
2610 next = strchr(pos, ' ');
2611 while (next != NULL) {
2613 log_debug("LINK '%s' %s:%u\n", pos,
2614 &rules->buf[rule->rule.filename_off], rule->rule.filename_line);
2615 util_strscpyl(filename, sizeof(filename), TEST_PREFIX "/dev/", pos, NULL);
2616 udev_device_add_devlink(event->dev, filename, cur->key.devlink_unique);
2617 while (isspace(next[1]))
2620 next = strchr(pos, ' ');
2622 if (pos[0] != '\0') {
2623 log_debug("LINK '%s' %s:%u\n", pos,
2624 &rules->buf[rule->rule.filename_off], rule->rule.filename_line);
2625 util_strscpyl(filename, sizeof(filename), TEST_PREFIX "/dev/", pos, NULL);
2626 udev_device_add_devlink(event->dev, filename, cur->key.devlink_unique);
2631 const char *key_name = &rules->buf[cur->key.attr_off];
2632 char attr[UTIL_PATH_SIZE];
2633 char value[UTIL_NAME_SIZE];
2636 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0)
2637 util_strscpyl(attr, sizeof(attr), udev_device_get_syspath(event->dev), "/", key_name, NULL);
2638 attr_subst_subdir(attr, sizeof(attr));
2640 udev_event_apply_format(event, &rules->buf[cur->key.value_off], value, sizeof(value));
2641 log_debug("ATTR '%s' writing '%s' %s:%u\n", attr, value,
2642 &rules->buf[rule->rule.filename_off],
2643 rule->rule.filename_line);
2644 f = fopen(attr, "w");
2646 if (fprintf(f, "%s", value) <= 0)
2647 log_error("error writing ATTR{%s}: %m\n", attr);
2650 log_error("error opening ATTR{%s} for writing: %m\n", attr);
2654 case TK_A_RUN_BUILTIN:
2655 case TK_A_RUN_PROGRAM: {
2656 struct udev_list_entry *entry;
2658 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2659 udev_list_cleanup(&event->run_list);
2660 log_debug("RUN '%s' %s:%u\n",
2661 &rules->buf[cur->key.value_off],
2662 &rules->buf[rule->rule.filename_off],
2663 rule->rule.filename_line);
2664 entry = udev_list_entry_add(&event->run_list, &rules->buf[cur->key.value_off], NULL);
2665 udev_list_entry_set_num(entry, cur->key.builtin_cmd);
2669 if (cur->key.rule_goto == 0)
2671 cur = &rules->tokens[cur->key.rule_goto];
2676 case TK_M_PARENTS_MIN:
2677 case TK_M_PARENTS_MAX:
2680 log_error("wrong type %u\n", cur->type);
2687 /* fast-forward to next rule */
2688 cur = rule + rule->rule.token_count;
2692 void udev_rules_apply_static_dev_perms(struct udev_rules *rules)
2700 if (rules->tokens == NULL)
2703 cur = &rules->tokens[0];
2706 switch (cur->type) {
2711 /* skip rules without a static_node tag */
2712 if (!rule->rule.has_static_node)
2726 mode = cur->key.mode;
2728 case TK_A_STATIC_NODE: {
2729 char filename[UTIL_PATH_SIZE];
2732 /* we assure, that the permissions tokens are sorted before the static token */
2733 if (mode == 0 && uid == 0 && gid == 0)
2735 util_strscpyl(filename, sizeof(filename), TEST_PREFIX "/dev/",
2736 &rules->buf[cur->key.value_off], NULL);
2737 if (stat(filename, &stats) != 0)
2739 if (!S_ISBLK(stats.st_mode) && !S_ISCHR(stats.st_mode))
2747 if (mode != (stats.st_mode & 01777)) {
2748 chmod(filename, mode);
2749 log_debug("chmod '%s' %#o\n", filename, mode);
2752 if ((uid != 0 && uid != stats.st_uid) || (gid != 0 && gid != stats.st_gid)) {
2753 chown(filename, uid, gid);
2754 log_debug("chown '%s' %u %u\n", filename, uid, gid);
2757 utimensat(AT_FDCWD, filename, NULL, 0);
2767 /* fast-forward to next rule */
2768 cur = rule + rule->rule.token_count;