2 * Copyright (C) 2003-2012 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/>.
34 #include "path-util.h"
35 #include "conf-files.h"
37 #define PREALLOC_TOKEN 2048
38 #define PREALLOC_STRBUF 32 * 1024
39 #define PREALLOC_TRIE 256
42 unsigned int name_off;
50 /* this node's first child */
51 unsigned int child_idx;
52 /* the next child of our parent node's child list */
53 unsigned int next_child_idx;
54 /* this node's last child (shortcut for append) */
55 unsigned int last_child_idx;
56 unsigned int value_off;
57 unsigned short value_len;
64 unsigned long long *dirs_ts_usec;
67 /* every key in the rules file becomes a token */
69 unsigned int token_cur;
70 unsigned int token_max;
72 /* all key strings are copied to a single string buffer */
76 unsigned int buf_count;
78 /* during rule parsing, strings are indexed and de-duplicated */
79 struct trie_node *trie_nodes;
80 unsigned int trie_nodes_cur;
81 unsigned int trie_nodes_max;
83 /* during rule parsing, uid/gid lookup results are cached */
85 unsigned int uids_cur;
86 unsigned int uids_max;
88 unsigned int gids_cur;
89 unsigned int gids_max;
92 /* KEY=="", KEY!="", KEY+="", KEY="", KEY:="" */
105 enum string_glob_type {
107 GL_PLAIN, /* no special chars */
108 GL_GLOB, /* shell globs ?,*,[] */
109 GL_SPLIT, /* multi-value A|B */
110 GL_SPLIT_GLOB, /* multi-value with glob A*|B* */
111 GL_SOMETHING, /* commonly used "?*" */
114 enum string_subst_type {
121 /* tokens of a rule are sorted/handled in this order */
126 TK_M_ACTION, /* val */
127 TK_M_DEVPATH, /* val */
128 TK_M_KERNEL, /* val */
129 TK_M_DEVLINK, /* val */
131 TK_M_ENV, /* val, attr */
133 TK_M_SUBSYSTEM, /* val */
134 TK_M_DRIVER, /* val */
135 TK_M_WAITFOR, /* val */
136 TK_M_ATTR, /* val, attr */
139 TK_M_KERNELS, /* val */
140 TK_M_SUBSYSTEMS, /* val */
141 TK_M_DRIVERS, /* val */
142 TK_M_ATTRS, /* val, attr */
146 TK_M_TEST, /* val, mode_t */
147 TK_M_EVENT_TIMEOUT, /* int */
148 TK_M_PROGRAM, /* val */
149 TK_M_IMPORT_FILE, /* val */
150 TK_M_IMPORT_PROG, /* val */
151 TK_M_IMPORT_BUILTIN, /* val */
152 TK_M_IMPORT_DB, /* val */
153 TK_M_IMPORT_CMDLINE, /* val */
154 TK_M_IMPORT_PARENT, /* val */
155 TK_M_RESULT, /* val */
158 TK_A_STRING_ESCAPE_NONE,
159 TK_A_STRING_ESCAPE_REPLACE,
161 TK_A_INOTIFY_WATCH, /* int */
162 TK_A_DEVLINK_PRIO, /* int */
163 TK_A_OWNER, /* val */
164 TK_A_GROUP, /* val */
166 TK_A_OWNER_ID, /* uid_t */
167 TK_A_GROUP_ID, /* gid_t */
168 TK_A_MODE_ID, /* mode_t */
169 TK_A_STATIC_NODE, /* val */
170 TK_A_ENV, /* val, attr */
173 TK_A_DEVLINK, /* val */
174 TK_A_ATTR, /* val, attr */
175 TK_A_RUN_BUILTIN, /* val, bool */
176 TK_A_RUN_PROGRAM, /* val, bool */
177 TK_A_GOTO, /* size_t */
182 /* we try to pack stuff in a way that we take only 12 bytes per token */
185 unsigned char type; /* same in rule and key */
187 enum token_type type:8;
189 bool has_static_node:1;
190 unsigned int unused:6;
191 unsigned short token_count;
192 unsigned int label_off;
193 unsigned short filename_off;
194 unsigned short filename_line;
197 enum token_type type:8;
198 enum operation_type op:8;
199 enum string_glob_type glob:8;
200 enum string_subst_type subst:4;
201 enum string_subst_type attrsubst:4;
202 unsigned int value_off;
204 unsigned int attr_off;
205 unsigned int rule_goto;
212 enum udev_builtin_cmd builtin_cmd;
220 struct udev_rules *rules;
222 struct token token[MAX_TK];
223 unsigned int token_cur;
227 static const char *operation_str(enum operation_type type)
229 static const char *operation_strs[] = {
230 [OP_UNSET] = "UNSET",
231 [OP_MATCH] = "match",
232 [OP_NOMATCH] = "nomatch",
233 [OP_MATCH_MAX] = "MATCH_MAX",
236 [OP_ASSIGN] = "assign",
237 [OP_ASSIGN_FINAL] = "assign-final",
240 return operation_strs[type];
243 static const char *string_glob_str(enum string_glob_type type)
245 static const char *string_glob_strs[] = {
246 [GL_UNSET] = "UNSET",
247 [GL_PLAIN] = "plain",
249 [GL_SPLIT] = "split",
250 [GL_SPLIT_GLOB] = "split-glob",
251 [GL_SOMETHING] = "split-glob",
254 return string_glob_strs[type];
257 static const char *token_str(enum token_type type)
259 static const char *token_strs[] = {
260 [TK_UNSET] = "UNSET",
263 [TK_M_ACTION] = "M ACTION",
264 [TK_M_DEVPATH] = "M DEVPATH",
265 [TK_M_KERNEL] = "M KERNEL",
266 [TK_M_DEVLINK] = "M DEVLINK",
267 [TK_M_NAME] = "M NAME",
268 [TK_M_ENV] = "M ENV",
269 [TK_M_TAG] = "M TAG",
270 [TK_M_SUBSYSTEM] = "M SUBSYSTEM",
271 [TK_M_DRIVER] = "M DRIVER",
272 [TK_M_WAITFOR] = "M WAITFOR",
273 [TK_M_ATTR] = "M ATTR",
275 [TK_M_PARENTS_MIN] = "M PARENTS_MIN",
276 [TK_M_KERNELS] = "M KERNELS",
277 [TK_M_SUBSYSTEMS] = "M SUBSYSTEMS",
278 [TK_M_DRIVERS] = "M DRIVERS",
279 [TK_M_ATTRS] = "M ATTRS",
280 [TK_M_TAGS] = "M TAGS",
281 [TK_M_PARENTS_MAX] = "M PARENTS_MAX",
283 [TK_M_TEST] = "M TEST",
284 [TK_M_EVENT_TIMEOUT] = "M EVENT_TIMEOUT",
285 [TK_M_PROGRAM] = "M PROGRAM",
286 [TK_M_IMPORT_FILE] = "M IMPORT_FILE",
287 [TK_M_IMPORT_PROG] = "M IMPORT_PROG",
288 [TK_M_IMPORT_BUILTIN] = "M IMPORT_BUILTIN",
289 [TK_M_IMPORT_DB] = "M IMPORT_DB",
290 [TK_M_IMPORT_CMDLINE] = "M IMPORT_CMDLINE",
291 [TK_M_IMPORT_PARENT] = "M IMPORT_PARENT",
292 [TK_M_RESULT] = "M RESULT",
293 [TK_M_MAX] = "M MAX",
295 [TK_A_STRING_ESCAPE_NONE] = "A STRING_ESCAPE_NONE",
296 [TK_A_STRING_ESCAPE_REPLACE] = "A STRING_ESCAPE_REPLACE",
297 [TK_A_DB_PERSIST] = "A DB_PERSIST",
298 [TK_A_INOTIFY_WATCH] = "A INOTIFY_WATCH",
299 [TK_A_DEVLINK_PRIO] = "A DEVLINK_PRIO",
300 [TK_A_OWNER] = "A OWNER",
301 [TK_A_GROUP] = "A GROUP",
302 [TK_A_MODE] = "A MODE",
303 [TK_A_OWNER_ID] = "A OWNER_ID",
304 [TK_A_GROUP_ID] = "A GROUP_ID",
305 [TK_A_STATIC_NODE] = "A STATIC_NODE",
306 [TK_A_MODE_ID] = "A MODE_ID",
307 [TK_A_ENV] = "A ENV",
308 [TK_A_TAG] = "A ENV",
309 [TK_A_NAME] = "A NAME",
310 [TK_A_DEVLINK] = "A DEVLINK",
311 [TK_A_ATTR] = "A ATTR",
312 [TK_A_RUN_BUILTIN] = "A RUN_BUILTIN",
313 [TK_A_RUN_PROGRAM] = "A RUN_PROGRAM",
314 [TK_A_GOTO] = "A GOTO",
319 return token_strs[type];
322 static void dump_token(struct udev_rules *rules, struct token *token)
324 enum token_type type = token->type;
325 enum operation_type op = token->key.op;
326 enum string_glob_type glob = token->key.glob;
327 const char *value = &rules->buf[token->key.value_off];
328 const char *attr = &rules->buf[token->key.attr_off];
333 const char *tks_ptr = (char *)rules->tokens;
334 const char *tk_ptr = (char *)token;
335 unsigned int idx = (tk_ptr - tks_ptr) / sizeof(struct token);
337 log_debug("* RULE %s:%u, token: %u, count: %u, label: '%s'\n",
338 &rules->buf[token->rule.filename_off], token->rule.filename_line,
339 idx, token->rule.token_count,
340 &rules->buf[token->rule.label_off]);
352 case TK_M_SUBSYSTEMS:
356 case TK_M_IMPORT_FILE:
357 case TK_M_IMPORT_PROG:
359 case TK_M_IMPORT_CMDLINE:
360 case TK_M_IMPORT_PARENT:
367 case TK_A_RUN_BUILTIN:
368 case TK_A_RUN_PROGRAM:
369 log_debug("%s %s '%s'(%s)\n",
370 token_str(type), operation_str(op), value, string_glob_str(glob));
372 case TK_M_IMPORT_BUILTIN:
373 log_debug("%s %i '%s'\n", token_str(type), token->key.builtin_cmd, value);
380 log_debug("%s %s '%s' '%s'(%s)\n",
381 token_str(type), operation_str(op), attr, value, string_glob_str(glob));
385 log_debug("%s %s '%s'\n", token_str(type), operation_str(op), value);
387 case TK_A_STRING_ESCAPE_NONE:
388 case TK_A_STRING_ESCAPE_REPLACE:
389 case TK_A_DB_PERSIST:
390 log_debug("%s\n", token_str(type));
393 log_debug("%s %s '%s'(%s) %#o\n",
394 token_str(type), operation_str(op), value, string_glob_str(glob), token->key.mode);
396 case TK_A_INOTIFY_WATCH:
397 log_debug("%s %u\n", token_str(type), token->key.watch);
399 case TK_A_DEVLINK_PRIO:
400 log_debug("%s %u\n", token_str(type), token->key.devlink_prio);
403 log_debug("%s %s %u\n", token_str(type), operation_str(op), token->key.uid);
406 log_debug("%s %s %u\n", token_str(type), operation_str(op), token->key.gid);
409 log_debug("%s %s %#o\n", token_str(type), operation_str(op), token->key.mode);
411 case TK_A_STATIC_NODE:
412 log_debug("%s '%s'\n", token_str(type), value);
414 case TK_M_EVENT_TIMEOUT:
415 log_debug("%s %u\n", token_str(type), token->key.event_timeout);
418 log_debug("%s '%s' %u\n", token_str(type), value, token->key.rule_goto);
421 log_debug("* %s\n", token_str(type));
423 case TK_M_PARENTS_MIN:
424 case TK_M_PARENTS_MAX:
427 log_debug("unknown type %u\n", type);
432 static void dump_rules(struct udev_rules *rules)
436 log_debug("dumping %u (%zu bytes) tokens, %u (%zu bytes) strings\n",
438 rules->token_cur * sizeof(struct token),
441 for(i = 0; i < rules->token_cur; i++)
442 dump_token(rules, &rules->tokens[i]);
445 static inline const char *operation_str(enum operation_type type) { return NULL; }
446 static inline const char *token_str(enum token_type type) { return NULL; }
447 static inline void dump_token(struct udev_rules *rules, struct token *token) {}
448 static inline void dump_rules(struct udev_rules *rules) {}
451 static int add_new_string(struct udev_rules *rules, const char *str, size_t bytes)
455 /* grow buffer if needed */
456 if (rules->buf_cur + bytes+1 >= rules->buf_max) {
460 /* double the buffer size */
461 add = rules->buf_max;
465 buf = realloc(rules->buf, rules->buf_max + add);
469 rules->buf_max += add;
471 off = rules->buf_cur;
472 memcpy(&rules->buf[rules->buf_cur], str, bytes);
473 rules->buf_cur += bytes;
478 static int add_string(struct udev_rules *rules, const char *str)
480 unsigned int node_idx;
481 struct trie_node *new_node;
482 unsigned int new_node_idx;
487 struct trie_node *parent;
489 /* walk trie, start from last character of str to find matching tails */
493 for (depth = 0; depth <= len; depth++) {
494 struct trie_node *node;
495 unsigned int child_idx;
497 node = &rules->trie_nodes[node_idx];
498 off = node->value_off + node->value_len - len;
500 /* match against current node */
501 if (depth == len || (node->value_len >= len && memcmp(&rules->buf[off], str, len) == 0))
504 /* lookup child node */
505 key = str[len - 1 - depth];
506 child_idx = node->child_idx;
507 while (child_idx > 0) {
508 struct trie_node *child;
510 child = &rules->trie_nodes[child_idx];
511 if (child->key == key)
513 child_idx = child->next_child_idx;
517 node_idx = child_idx;
520 /* string not found, add it */
521 off = add_new_string(rules, str, len + 1);
523 /* grow trie nodes if needed */
524 if (rules->trie_nodes_cur >= rules->trie_nodes_max) {
525 struct trie_node *nodes;
528 /* double the buffer size */
529 add = rules->trie_nodes_max;
533 nodes = realloc(rules->trie_nodes, (rules->trie_nodes_max + add) * sizeof(struct trie_node));
536 rules->trie_nodes = nodes;
537 rules->trie_nodes_max += add;
541 new_node_idx = rules->trie_nodes_cur;
542 rules->trie_nodes_cur++;
543 new_node = &rules->trie_nodes[new_node_idx];
544 memset(new_node, 0x00, sizeof(struct trie_node));
545 new_node->value_off = off;
546 new_node->value_len = len;
549 /* join the parent's child list */
550 parent = &rules->trie_nodes[node_idx];
551 if (parent->child_idx == 0) {
552 parent->child_idx = new_node_idx;
554 struct trie_node *last_child;
556 last_child = &rules->trie_nodes[parent->last_child_idx];
557 last_child->next_child_idx = new_node_idx;
559 parent->last_child_idx = new_node_idx;
563 static int add_token(struct udev_rules *rules, struct token *token)
565 /* grow buffer if needed */
566 if (rules->token_cur+1 >= rules->token_max) {
567 struct token *tokens;
570 /* double the buffer size */
571 add = rules->token_max;
575 tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
578 rules->tokens = tokens;
579 rules->token_max += add;
581 memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
586 static uid_t add_uid(struct udev_rules *rules, const char *owner)
592 /* lookup, if we know it already */
593 for (i = 0; i < rules->uids_cur; i++) {
594 off = rules->uids[i].name_off;
595 if (streq(&rules->buf[off], owner)) {
596 uid = rules->uids[i].uid;
600 uid = util_lookup_user(rules->udev, owner);
602 /* grow buffer if needed */
603 if (rules->uids_cur+1 >= rules->uids_max) {
604 struct uid_gid *uids;
607 /* double the buffer size */
608 add = rules->uids_max;
612 uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
616 rules->uids_max += add;
618 rules->uids[rules->uids_cur].uid = uid;
619 off = add_string(rules, owner);
622 rules->uids[rules->uids_cur].name_off = off;
627 static gid_t add_gid(struct udev_rules *rules, const char *group)
633 /* lookup, if we know it already */
634 for (i = 0; i < rules->gids_cur; i++) {
635 off = rules->gids[i].name_off;
636 if (streq(&rules->buf[off], group)) {
637 gid = rules->gids[i].gid;
641 gid = util_lookup_group(rules->udev, group);
643 /* grow buffer if needed */
644 if (rules->gids_cur+1 >= rules->gids_max) {
645 struct uid_gid *gids;
648 /* double the buffer size */
649 add = rules->gids_max;
653 gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid));
657 rules->gids_max += add;
659 rules->gids[rules->gids_cur].gid = gid;
660 off = add_string(rules, group);
663 rules->gids[rules->gids_cur].name_off = off;
668 static int import_property_from_string(struct udev_device *dev, char *line)
676 while (isspace(key[0]))
679 /* comment or empty line */
680 if (key[0] == '#' || key[0] == '\0')
683 /* split key/value */
684 val = strchr(key, '=');
691 while (isspace(val[0]))
698 while (isspace(key[len-1]))
702 /* terminate value */
706 while (isspace(val[len-1]))
714 if (val[0] == '"' || val[0] == '\'') {
715 if (val[len-1] != val[0]) {
716 log_debug("inconsistent quoting: '%s', skip\n", line);
723 /* handle device, renamed by external tool, returning new path */
724 if (streq(key, "DEVPATH")) {
725 char syspath[UTIL_PATH_SIZE];
727 log_debug("updating devpath from '%s' to '%s'\n",
728 udev_device_get_devpath(dev), val);
729 util_strscpyl(syspath, sizeof(syspath), "/sys", val, NULL);
730 udev_device_set_syspath(dev, syspath);
732 struct udev_list_entry *entry;
734 entry = udev_device_add_property(dev, key, val);
735 /* store in db, skip private keys */
737 udev_list_entry_set_num(entry, true);
742 static int import_file_into_properties(struct udev_device *dev, const char *filename)
745 char line[UTIL_LINE_SIZE];
747 f = fopen(filename, "re");
750 while (fgets(line, sizeof(line), f) != NULL)
751 import_property_from_string(dev, line);
756 static int import_program_into_properties(struct udev_event *event, const char *program, const sigset_t *sigmask)
758 struct udev_device *dev = event->dev;
760 char result[UTIL_LINE_SIZE];
764 envp = udev_device_get_properties_envp(dev);
765 err = udev_event_spawn(event, program, envp, sigmask, result, sizeof(result));
770 while (line != NULL) {
773 pos = strchr(line, '\n');
778 import_property_from_string(dev, line);
784 static int import_parent_into_properties(struct udev_device *dev, const char *filter)
786 struct udev_device *dev_parent;
787 struct udev_list_entry *list_entry;
789 dev_parent = udev_device_get_parent(dev);
790 if (dev_parent == NULL)
793 udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
794 const char *key = udev_list_entry_get_name(list_entry);
795 const char *val = udev_list_entry_get_value(list_entry);
797 if (fnmatch(filter, key, 0) == 0) {
798 struct udev_list_entry *entry;
800 entry = udev_device_add_property(dev, key, val);
801 /* store in db, skip private keys */
803 udev_list_entry_set_num(entry, true);
809 #define WAIT_LOOP_PER_SECOND 50
810 static int wait_for_file(struct udev_device *dev, const char *file, int timeout)
812 char filepath[UTIL_PATH_SIZE];
813 char devicepath[UTIL_PATH_SIZE];
815 int loop = timeout * WAIT_LOOP_PER_SECOND;
817 /* a relative path is a device attribute */
818 devicepath[0] = '\0';
819 if (file[0] != '/') {
820 util_strscpyl(devicepath, sizeof(devicepath), udev_device_get_syspath(dev), NULL);
821 util_strscpyl(filepath, sizeof(filepath), devicepath, "/", file, NULL);
826 const struct timespec duration = { 0, 1000 * 1000 * 1000 / WAIT_LOOP_PER_SECOND };
829 if (stat(file, &stats) == 0) {
830 log_debug("file '%s' appeared after %i loops\n", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
833 /* make sure, the device did not disappear in the meantime */
834 if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
835 log_debug("device disappeared while waiting for '%s'\n", file);
838 log_debug("wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND);
839 nanosleep(&duration, NULL);
841 log_debug("waiting for '%s' failed\n", file);
845 static int attr_subst_subdir(char *attr, size_t len)
849 if (strstr(attr, "/*/")) {
851 char dirname[UTIL_PATH_SIZE];
855 util_strscpy(dirname, sizeof(dirname), attr);
856 pos = strstr(dirname, "/*/");
861 dir = opendir(dirname);
865 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
868 if (dent->d_name[0] == '.')
870 util_strscpyl(attr, len, dirname, "/", dent->d_name, tail, NULL);
871 if (stat(attr, &stats) == 0) {
883 static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value)
889 if (linepos == NULL || linepos[0] == '\0')
892 /* skip whitespace */
893 while (isspace(linepos[0]) || linepos[0] == ',')
897 if (linepos[0] == '\0')
903 if (linepos[0] == '\0')
905 if (isspace(linepos[0]))
907 if (linepos[0] == '=')
909 if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
910 if (linepos[1] == '=')
914 /* remember end of key */
917 /* skip whitespace after key */
918 while (isspace(linepos[0]))
920 if (linepos[0] == '\0')
923 /* get operation type */
924 if (linepos[0] == '=' && linepos[1] == '=') {
927 } else if (linepos[0] == '!' && linepos[1] == '=') {
930 } else if (linepos[0] == '+' && linepos[1] == '=') {
933 } else if (linepos[0] == '=') {
936 } else if (linepos[0] == ':' && linepos[1] == '=') {
937 *op = OP_ASSIGN_FINAL;
945 /* skip whitespace after operator */
946 while (isspace(linepos[0]))
948 if (linepos[0] == '\0')
952 if (linepos[0] == '"')
959 temp = strchr(linepos, '"');
965 /* move line to next key */
970 /* extract possible KEY{attr} */
971 static const char *get_key_attribute(struct udev *udev, char *str)
976 attr = strchr(str, '{');
979 pos = strchr(attr, '}');
981 log_error("missing closing brace for format\n");
990 static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
991 enum operation_type op,
992 const char *value, const void *data)
994 struct token *token = &rule_tmp->token[rule_tmp->token_cur];
995 const char *attr = NULL;
997 memset(token, 0x00, sizeof(struct token));
1003 case TK_M_SUBSYSTEM:
1009 case TK_M_SUBSYSTEMS:
1013 case TK_M_IMPORT_FILE:
1014 case TK_M_IMPORT_PROG:
1015 case TK_M_IMPORT_DB:
1016 case TK_M_IMPORT_CMDLINE:
1017 case TK_M_IMPORT_PARENT:
1027 token->key.value_off = add_string(rule_tmp->rules, value);
1029 case TK_M_IMPORT_BUILTIN:
1030 token->key.value_off = add_string(rule_tmp->rules, value);
1031 token->key.builtin_cmd = *(enum udev_builtin_cmd *)data;
1039 token->key.value_off = add_string(rule_tmp->rules, value);
1040 token->key.attr_off = add_string(rule_tmp->rules, attr);
1043 token->key.value_off = add_string(rule_tmp->rules, value);
1045 token->key.mode = *(mode_t *)data;
1047 case TK_A_STRING_ESCAPE_NONE:
1048 case TK_A_STRING_ESCAPE_REPLACE:
1049 case TK_A_DB_PERSIST:
1051 case TK_A_RUN_BUILTIN:
1052 case TK_A_RUN_PROGRAM:
1053 token->key.builtin_cmd = *(enum udev_builtin_cmd *)data;
1054 token->key.value_off = add_string(rule_tmp->rules, value);
1056 case TK_A_INOTIFY_WATCH:
1057 case TK_A_DEVLINK_PRIO:
1058 token->key.devlink_prio = *(int *)data;
1061 token->key.uid = *(uid_t *)data;
1064 token->key.gid = *(gid_t *)data;
1067 token->key.mode = *(mode_t *)data;
1069 case TK_A_STATIC_NODE:
1070 token->key.value_off = add_string(rule_tmp->rules, value);
1072 case TK_M_EVENT_TIMEOUT:
1073 token->key.event_timeout = *(int *)data;
1076 case TK_M_PARENTS_MIN:
1077 case TK_M_PARENTS_MAX:
1081 log_error("wrong type %u\n", type);
1085 if (value != NULL && type < TK_M_MAX) {
1086 /* check if we need to split or call fnmatch() while matching rules */
1087 enum string_glob_type glob;
1091 has_split = (strchr(value, '|') != NULL);
1092 has_glob = (strchr(value, '*') != NULL || strchr(value, '?') != NULL || strchr(value, '[') != NULL);
1093 if (has_split && has_glob) {
1094 glob = GL_SPLIT_GLOB;
1095 } else if (has_split) {
1097 } else if (has_glob) {
1098 if (streq(value, "?*"))
1099 glob = GL_SOMETHING;
1105 token->key.glob = glob;
1108 if (value != NULL && type > TK_M_MAX) {
1109 /* check if assigned value has substitution chars */
1110 if (value[0] == '[')
1111 token->key.subst = SB_SUBSYS;
1112 else if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
1113 token->key.subst = SB_FORMAT;
1115 token->key.subst = SB_NONE;
1119 /* check if property/attribut name has substitution chars */
1121 token->key.attrsubst = SB_SUBSYS;
1122 else if (strchr(attr, '%') != NULL || strchr(attr, '$') != NULL)
1123 token->key.attrsubst = SB_FORMAT;
1125 token->key.attrsubst = SB_NONE;
1128 token->key.type = type;
1130 rule_tmp->token_cur++;
1131 if (rule_tmp->token_cur >= ELEMENTSOF(rule_tmp->token)) {
1132 log_error("temporary rule array too small\n");
1138 static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp)
1141 unsigned int start = 0;
1142 unsigned int end = rule_tmp->token_cur;
1144 for (i = 0; i < rule_tmp->token_cur; i++) {
1145 enum token_type next_val = TK_UNSET;
1146 unsigned int next_idx = 0;
1149 /* find smallest value */
1150 for (j = start; j < end; j++) {
1151 if (rule_tmp->token[j].type == TK_UNSET)
1153 if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
1154 next_val = rule_tmp->token[j].type;
1159 /* add token and mark done */
1160 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
1162 rule_tmp->token[next_idx].type = TK_UNSET;
1165 if (next_idx == start)
1167 if (next_idx+1 == end)
1173 static int add_rule(struct udev_rules *rules, char *line,
1174 const char *filename, unsigned int filename_off, unsigned int lineno)
1178 struct rule_tmp rule_tmp;
1180 memset(&rule_tmp, 0x00, sizeof(struct rule_tmp));
1181 rule_tmp.rules = rules;
1182 rule_tmp.rule.type = TK_RULE;
1183 /* the offset in the rule is limited to unsigned short */
1184 if (filename_off < USHRT_MAX)
1185 rule_tmp.rule.rule.filename_off = filename_off;
1186 rule_tmp.rule.rule.filename_line = lineno;
1192 enum operation_type op;
1194 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0)
1197 if (streq(key, "ACTION")) {
1198 if (op > OP_MATCH_MAX) {
1199 log_error("invalid ACTION operation\n");
1202 rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL);
1206 if (streq(key, "DEVPATH")) {
1207 if (op > OP_MATCH_MAX) {
1208 log_error("invalid DEVPATH operation\n");
1211 rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
1215 if (streq(key, "KERNEL")) {
1216 if (op > OP_MATCH_MAX) {
1217 log_error("invalid KERNEL operation\n");
1220 rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL);
1224 if (streq(key, "SUBSYSTEM")) {
1225 if (op > OP_MATCH_MAX) {
1226 log_error("invalid SUBSYSTEM operation\n");
1229 /* bus, class, subsystem events should all be the same */
1230 if (streq(value, "subsystem") ||
1231 streq(value, "bus") ||
1232 streq(value, "class")) {
1233 if (streq(value, "bus") || streq(value, "class"))
1234 log_error("'%s' must be specified as 'subsystem' \n"
1235 "please fix it in %s:%u", value, filename, lineno);
1236 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
1238 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
1242 if (streq(key, "DRIVER")) {
1243 if (op > OP_MATCH_MAX) {
1244 log_error("invalid DRIVER operation\n");
1247 rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL);
1251 if (startswith(key, "ATTR{")) {
1252 attr = get_key_attribute(rules->udev, key + sizeof("ATTR")-1);
1254 log_error("error parsing ATTR attribute\n");
1257 if (op < OP_MATCH_MAX) {
1258 rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
1260 rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr);
1265 if (streq(key, "KERNELS")) {
1266 if (op > OP_MATCH_MAX) {
1267 log_error("invalid KERNELS operation\n");
1270 rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1274 if (streq(key, "SUBSYSTEMS")) {
1275 if (op > OP_MATCH_MAX) {
1276 log_error("invalid SUBSYSTEMS operation\n");
1279 rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1283 if (streq(key, "DRIVERS")) {
1284 if (op > OP_MATCH_MAX) {
1285 log_error("invalid DRIVERS operation\n");
1288 rule_add_key(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
1292 if (startswith(key, "ATTRS{")) {
1293 if (op > OP_MATCH_MAX) {
1294 log_error("invalid ATTRS operation\n");
1297 attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
1299 log_error("error parsing ATTRS attribute\n");
1302 if (startswith(attr, "device/"))
1303 log_error("the 'device' link may not be available in a future kernel, "
1304 "please fix it in %s:%u", filename, lineno);
1305 else if (strstr(attr, "../") != NULL)
1306 log_error("do not reference parent sysfs directories directly, "
1307 "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
1308 rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1312 if (streq(key, "TAGS")) {
1313 if (op > OP_MATCH_MAX) {
1314 log_error("invalid TAGS operation\n");
1317 rule_add_key(&rule_tmp, TK_M_TAGS, op, value, NULL);
1321 if (startswith(key, "ENV{")) {
1322 attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1);
1324 log_error("error parsing ENV attribute\n");
1327 if (op < OP_MATCH_MAX) {
1328 if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
1331 static const char *blacklist[] = {
1346 for (i = 0; i < ELEMENTSOF(blacklist); i++) {
1347 if (!streq(attr, blacklist[i]))
1349 log_error("invalid ENV attribute, '%s' can not be set %s:%u\n", attr, filename, lineno);
1352 if (rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
1358 if (streq(key, "TAG")) {
1359 if (op < OP_MATCH_MAX)
1360 rule_add_key(&rule_tmp, TK_M_TAG, op, value, NULL);
1362 rule_add_key(&rule_tmp, TK_A_TAG, op, value, NULL);
1366 if (streq(key, "PROGRAM")) {
1367 rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
1371 if (streq(key, "RESULT")) {
1372 if (op > OP_MATCH_MAX) {
1373 log_error("invalid RESULT operation\n");
1376 rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL);
1380 if (startswith(key, "IMPORT")) {
1381 attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1);
1383 log_error("IMPORT{} type missing, ignoring IMPORT %s:%u\n", filename, lineno);
1386 if (streq(attr, "program")) {
1387 /* find known built-in command */
1388 if (value[0] != '/') {
1389 enum udev_builtin_cmd cmd;
1391 cmd = udev_builtin_lookup(value);
1392 if (cmd < UDEV_BUILTIN_MAX) {
1393 log_debug("IMPORT found builtin '%s', replacing %s:%u\n",
1394 value, filename, lineno);
1395 rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, value, &cmd);
1399 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1400 } else if (streq(attr, "builtin")) {
1401 enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
1403 if (cmd < UDEV_BUILTIN_MAX)
1404 rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, value, &cmd);
1406 log_error("IMPORT{builtin}: '%s' unknown %s:%u\n", value, filename, lineno);
1407 } else if (streq(attr, "file")) {
1408 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1409 } else if (streq(attr, "db")) {
1410 rule_add_key(&rule_tmp, TK_M_IMPORT_DB, op, value, NULL);
1411 } else if (streq(attr, "cmdline")) {
1412 rule_add_key(&rule_tmp, TK_M_IMPORT_CMDLINE, op, value, NULL);
1413 } else if (streq(attr, "parent")) {
1414 rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
1416 log_error("IMPORT{} unknown type, ignoring IMPORT %s:%u\n", filename, lineno);
1420 if (startswith(key, "TEST")) {
1423 if (op > OP_MATCH_MAX) {
1424 log_error("invalid TEST operation\n");
1427 attr = get_key_attribute(rules->udev, key + sizeof("TEST")-1);
1429 mode = strtol(attr, NULL, 8);
1430 rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode);
1432 rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL);
1437 if (startswith(key, "RUN")) {
1438 attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1);
1442 if (streq(attr, "builtin")) {
1443 enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
1445 if (cmd < UDEV_BUILTIN_MAX)
1446 rule_add_key(&rule_tmp, TK_A_RUN_BUILTIN, op, value, &cmd);
1448 log_error("IMPORT{builtin}: '%s' unknown %s:%u\n", value, filename, lineno);
1449 } else if (streq(attr, "program")) {
1450 enum udev_builtin_cmd cmd = UDEV_BUILTIN_MAX;
1452 rule_add_key(&rule_tmp, TK_A_RUN_PROGRAM, op, value, &cmd);
1454 log_error("RUN{} unknown type, ignoring RUN %s:%u\n", filename, lineno);
1460 if (streq(key, "WAIT_FOR") || streq(key, "WAIT_FOR_SYSFS")) {
1461 rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1465 if (streq(key, "LABEL")) {
1466 rule_tmp.rule.rule.label_off = add_string(rules, value);
1470 if (streq(key, "GOTO")) {
1471 rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1475 if (startswith(key, "NAME")) {
1476 if (op < OP_MATCH_MAX) {
1477 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
1479 if (streq(value, "%k")) {
1480 log_error("NAME=\"%%k\" is ignored, because it breaks kernel supplied names, "
1481 "please remove it from %s:%u\n", filename, lineno);
1484 if (value[0] == '\0') {
1485 log_debug("NAME=\"\" is ignored, because udev will not delete any device nodes, "
1486 "please remove it from %s:%u\n", filename, lineno);
1489 rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL);
1491 rule_tmp.rule.rule.can_set_name = true;
1495 if (streq(key, "SYMLINK")) {
1496 if (op < OP_MATCH_MAX)
1497 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
1499 rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, NULL);
1500 rule_tmp.rule.rule.can_set_name = true;
1504 if (streq(key, "OWNER")) {
1508 uid = strtoul(value, &endptr, 10);
1509 if (endptr[0] == '\0') {
1510 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1511 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1512 uid = add_uid(rules, value);
1513 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1514 } else if (rules->resolve_names >= 0) {
1515 rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
1517 rule_tmp.rule.rule.can_set_name = true;
1521 if (streq(key, "GROUP")) {
1525 gid = strtoul(value, &endptr, 10);
1526 if (endptr[0] == '\0') {
1527 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1528 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1529 gid = add_gid(rules, value);
1530 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1531 } else if (rules->resolve_names >= 0) {
1532 rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
1534 rule_tmp.rule.rule.can_set_name = true;
1538 if (streq(key, "MODE")) {
1542 mode = strtol(value, &endptr, 8);
1543 if (endptr[0] == '\0')
1544 rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1546 rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
1547 rule_tmp.rule.rule.can_set_name = true;
1551 if (streq(key, "OPTIONS")) {
1554 pos = strstr(value, "link_priority=");
1556 int prio = atoi(&pos[strlen("link_priority=")]);
1558 rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, op, NULL, &prio);
1561 pos = strstr(value, "event_timeout=");
1563 int tout = atoi(&pos[strlen("event_timeout=")]);
1565 rule_add_key(&rule_tmp, TK_M_EVENT_TIMEOUT, op, NULL, &tout);
1568 pos = strstr(value, "string_escape=");
1570 pos = &pos[strlen("string_escape=")];
1571 if (startswith(pos, "none"))
1572 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, op, NULL, NULL);
1573 else if (startswith(pos, "replace"))
1574 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, op, NULL, NULL);
1577 pos = strstr(value, "db_persist");
1579 rule_add_key(&rule_tmp, TK_A_DB_PERSIST, op, NULL, NULL);
1581 pos = strstr(value, "nowatch");
1585 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &off);
1587 pos = strstr(value, "watch");
1591 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &on);
1595 pos = strstr(value, "static_node=");
1597 rule_add_key(&rule_tmp, TK_A_STATIC_NODE, op, &pos[strlen("static_node=")], NULL);
1598 rule_tmp.rule.rule.has_static_node = true;
1604 log_error("unknown key '%s' in %s:%u\n", key, filename, lineno);
1608 /* add rule token */
1609 rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur;
1610 if (add_token(rules, &rule_tmp.rule) != 0)
1613 /* add tokens to list, sorted by type */
1614 if (sort_token(rules, &rule_tmp) != 0)
1619 log_error("invalid rule '%s:%u'\n", filename, lineno);
1623 static int parse_file(struct udev_rules *rules, const char *filename)
1626 unsigned int first_token;
1627 unsigned int filename_off;
1628 char line[UTIL_LINE_SIZE];
1632 if (null_or_empty_path(filename)) {
1633 log_debug("skip empty file: %s\n", filename);
1636 log_debug("read rules file: %s\n", filename);
1638 f = fopen(filename, "re");
1642 first_token = rules->token_cur;
1643 filename_off = add_string(rules, filename);
1645 while (fgets(line, sizeof(line), f) != NULL) {
1649 /* skip whitespace */
1652 while (isspace(key[0]))
1663 /* continue reading if backslash+newline is found */
1664 while (line[len-2] == '\\') {
1665 if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1667 if (strlen(&line[len-2]) < 2)
1673 if (len+1 >= sizeof(line)) {
1674 log_error("line too long '%s':%u, ignored\n", filename, line_nr);
1677 add_rule(rules, key, filename, filename_off, line_nr);
1681 /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1682 for (i = first_token+1; i < rules->token_cur; i++) {
1683 if (rules->tokens[i].type == TK_A_GOTO) {
1684 char *label = &rules->buf[rules->tokens[i].key.value_off];
1687 for (j = i+1; j < rules->token_cur; j++) {
1688 if (rules->tokens[j].type != TK_RULE)
1690 if (rules->tokens[j].rule.label_off == 0)
1692 if (!streq(label, &rules->buf[rules->tokens[j].rule.label_off]))
1694 rules->tokens[i].key.rule_goto = j;
1697 if (rules->tokens[i].key.rule_goto == 0)
1698 log_error("GOTO '%s' has no matching label in: '%s'\n", label, filename);
1704 struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
1706 struct udev_rules *rules;
1707 struct udev_list file_list;
1708 struct token end_token;
1712 rules = calloc(1, sizeof(struct udev_rules));
1716 rules->resolve_names = resolve_names;
1717 udev_list_init(udev, &file_list, true);
1719 /* init token array and string buffer */
1720 rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
1721 if (rules->tokens == NULL)
1722 return udev_rules_unref(rules);
1724 rules->token_max = PREALLOC_TOKEN;
1726 rules->buf = malloc(PREALLOC_STRBUF);
1727 if (rules->buf == NULL)
1728 return udev_rules_unref(rules);
1730 rules->buf_max = PREALLOC_STRBUF;
1731 /* offset 0 is always '\0' */
1732 rules->buf[0] = '\0';
1735 rules->trie_nodes = malloc(PREALLOC_TRIE * sizeof(struct trie_node));
1736 if (rules->trie_nodes == NULL)
1737 return udev_rules_unref(rules);
1739 rules->trie_nodes_max = PREALLOC_TRIE;
1740 /* offset 0 is the trie root, with an empty string */
1741 memset(rules->trie_nodes, 0x00, sizeof(struct trie_node));
1742 rules->trie_nodes_cur = 1;
1744 rules->dirs = strv_new(SYSCONFDIR "/udev/rules.d",
1745 "/run/udev/rules.d",
1746 UDEVLIBEXECDIR "/rules.d",
1749 log_error("failed to build config directory array");
1750 return udev_rules_unref(rules);
1752 if (!path_strv_canonicalize(rules->dirs)) {
1753 log_error("failed to canonicalize config directories\n");
1754 return udev_rules_unref(rules);
1756 strv_uniq(rules->dirs);
1758 rules->dirs_ts_usec = calloc(strv_length(rules->dirs), sizeof(long long));
1759 if(!rules->dirs_ts_usec)
1760 return udev_rules_unref(rules);
1761 udev_rules_check_timestamp(rules);
1763 r = conf_files_list_strv(&files, ".rules", (const char **)rules->dirs);
1765 log_error("failed to enumerate rules files: %s\n", strerror(-r));
1766 return udev_rules_unref(rules);
1770 * The offset value in the rules strct is limited; add all
1771 * rules file names to the beginning of the string buffer.
1773 STRV_FOREACH(f, files)
1774 add_string(rules, *f);
1776 STRV_FOREACH(f, files)
1777 parse_file(rules, *f);
1781 memset(&end_token, 0x00, sizeof(struct token));
1782 end_token.type = TK_END;
1783 add_token(rules, &end_token);
1785 /* shrink allocated token and string buffer */
1786 if (rules->token_cur < rules->token_max) {
1787 struct token *tokens;
1789 tokens = realloc(rules->tokens, rules->token_cur * sizeof(struct token));
1790 if (tokens != NULL || rules->token_cur == 0) {
1791 rules->tokens = tokens;
1792 rules->token_max = rules->token_cur;
1795 if (rules->buf_cur < rules->buf_max) {
1798 buf = realloc(rules->buf, rules->buf_cur);
1799 if (buf != NULL || rules->buf_cur == 0) {
1801 rules->buf_max = rules->buf_cur;
1804 log_debug("rules use %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1805 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1806 log_debug("temporary index used %zu bytes (%u * %zu bytes)\n",
1807 rules->trie_nodes_cur * sizeof(struct trie_node),
1808 rules->trie_nodes_cur, sizeof(struct trie_node));
1811 free(rules->trie_nodes);
1812 rules->trie_nodes = NULL;
1813 rules->trie_nodes_cur = 0;
1814 rules->trie_nodes_max = 0;
1816 /* cleanup uid/gid cache */
1819 rules->uids_cur = 0;
1820 rules->uids_max = 0;
1823 rules->gids_cur = 0;
1824 rules->gids_max = 0;
1830 struct udev_rules *udev_rules_unref(struct udev_rules *rules)
1834 free(rules->tokens);
1836 free(rules->trie_nodes);
1839 strv_free(rules->dirs);
1840 free(rules->dirs_ts_usec);
1845 bool udev_rules_check_timestamp(struct udev_rules *rules)
1848 bool changed = false;
1853 for (i = 0; rules->dirs[i]; i++) {
1856 if (stat(rules->dirs[i], &stats) < 0)
1859 if (rules->dirs_ts_usec[i] == ts_usec(&stats.st_mtim))
1863 if (rules->dirs_ts_usec[i] != 0) {
1864 log_debug("reload - timestamp of '%s' changed\n", rules->dirs[i]);
1868 /* update timestamp */
1869 rules->dirs_ts_usec[i] = ts_usec(&stats.st_mtim);
1875 static int match_key(struct udev_rules *rules, struct token *token, const char *val)
1877 char *key_value = &rules->buf[token->key.value_off];
1884 switch (token->key.glob) {
1886 match = (streq(key_value, val));
1889 match = (fnmatch(key_value, val, 0) == 0);
1896 s = &rules->buf[token->key.value_off];
1901 next = strchr(s, '|');
1903 size_t matchlen = (size_t)(next - s);
1905 match = (matchlen == len && strncmp(s, val, matchlen) == 0);
1909 match = (streq(s, val));
1918 char value[UTIL_PATH_SIZE];
1920 util_strscpy(value, sizeof(value), &rules->buf[token->key.value_off]);
1922 while (key_value != NULL) {
1923 pos = strchr(key_value, '|');
1928 match = (fnmatch(key_value, val, 0) == 0);
1936 match = (val[0] != '\0');
1942 if (match && (token->key.op == OP_MATCH))
1944 if (!match && (token->key.op == OP_NOMATCH))
1949 static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur)
1952 char nbuf[UTIL_NAME_SIZE];
1954 char vbuf[UTIL_NAME_SIZE];
1957 name = &rules->buf[cur->key.attr_off];
1958 switch (cur->key.attrsubst) {
1960 udev_event_apply_format(event, name, nbuf, sizeof(nbuf));
1964 value = udev_device_get_sysattr_value(dev, name);
1969 if (util_resolve_subsys_kernel(event->udev, name, vbuf, sizeof(vbuf), 1) != 0)
1977 /* remove trailing whitespace, if not asked to match for it */
1978 len = strlen(value);
1979 if (len > 0 && isspace(value[len-1])) {
1980 const char *key_value;
1983 key_value = &rules->buf[cur->key.value_off];
1984 klen = strlen(key_value);
1985 if (klen > 0 && !isspace(key_value[klen-1])) {
1986 if (value != vbuf) {
1987 util_strscpy(vbuf, sizeof(vbuf), value);
1990 while (len > 0 && isspace(vbuf[--len]))
1995 return match_key(rules, cur, value);
2004 int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event, const sigset_t *sigmask)
2008 enum escape_type esc = ESCAPE_UNSET;
2011 if (rules->tokens == NULL)
2014 can_set_name = ((!streq(udev_device_get_action(event->dev), "remove")) &&
2015 (major(udev_device_get_devnum(event->dev)) > 0 ||
2016 udev_device_get_ifindex(event->dev) > 0));
2018 /* loop through token list, match, run actions or forward to next rule */
2019 cur = &rules->tokens[0];
2022 dump_token(rules, cur);
2023 switch (cur->type) {
2027 /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
2028 if (!can_set_name && rule->rule.can_set_name)
2033 if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
2037 if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
2041 if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
2044 case TK_M_DEVLINK: {
2045 struct udev_list_entry *list_entry;
2048 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
2049 const char *devlink;
2051 devlink = udev_list_entry_get_name(list_entry) + strlen("/dev/");
2052 if (match_key(rules, cur, devlink) == 0) {
2062 if (match_key(rules, cur, event->name) != 0)
2066 const char *key_name = &rules->buf[cur->key.attr_off];
2069 value = udev_device_get_property_value(event->dev, key_name);
2072 if (match_key(rules, cur, value))
2077 struct udev_list_entry *list_entry;
2080 udev_list_entry_foreach(list_entry, udev_device_get_tags_list_entry(event->dev)) {
2081 if (streq(&rules->buf[cur->key.value_off], udev_list_entry_get_name(list_entry))) {
2086 if (!match && (cur->key.op != OP_NOMATCH))
2090 case TK_M_SUBSYSTEM:
2091 if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
2095 if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
2098 case TK_M_WAITFOR: {
2099 char filename[UTIL_PATH_SIZE];
2102 udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename));
2103 found = (wait_for_file(event->dev, filename, 10) == 0);
2104 if (!found && (cur->key.op != OP_NOMATCH))
2109 if (match_attr(rules, event->dev, event, cur) != 0)
2113 case TK_M_SUBSYSTEMS:
2119 /* get whole sequence of parent matches */
2121 while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX)
2124 /* loop over parents */
2125 event->dev_parent = event->dev;
2129 /* loop over sequence of parent match keys */
2130 for (key = cur; key < next; key++ ) {
2131 dump_token(rules, key);
2134 if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
2137 case TK_M_SUBSYSTEMS:
2138 if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
2142 if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
2146 if (match_attr(rules, event->dev_parent, event, key) != 0)
2150 bool match = udev_device_has_tag(event->dev_parent, &rules->buf[cur->key.value_off]);
2152 if (match && key->key.op == OP_NOMATCH)
2154 if (!match && key->key.op == OP_MATCH)
2165 event->dev_parent = udev_device_get_parent(event->dev_parent);
2166 if (event->dev_parent == NULL)
2169 /* move behind our sequence of parent match keys */
2174 char filename[UTIL_PATH_SIZE];
2175 struct stat statbuf;
2178 udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename));
2179 if (util_resolve_subsys_kernel(event->udev, filename, filename, sizeof(filename), 0) != 0) {
2180 if (filename[0] != '/') {
2181 char tmp[UTIL_PATH_SIZE];
2183 util_strscpy(tmp, sizeof(tmp), filename);
2184 util_strscpyl(filename, sizeof(filename),
2185 udev_device_get_syspath(event->dev), "/", tmp, NULL);
2188 attr_subst_subdir(filename, sizeof(filename));
2190 match = (stat(filename, &statbuf) == 0);
2191 if (match && cur->key.mode > 0)
2192 match = ((statbuf.st_mode & cur->key.mode) > 0);
2193 if (match && cur->key.op == OP_NOMATCH)
2195 if (!match && cur->key.op == OP_MATCH)
2199 case TK_M_EVENT_TIMEOUT:
2200 log_debug("OPTIONS event_timeout=%u\n", cur->key.event_timeout);
2201 event->timeout_usec = cur->key.event_timeout * 1000 * 1000;
2203 case TK_M_PROGRAM: {
2204 char program[UTIL_PATH_SIZE];
2206 char result[UTIL_PATH_SIZE];
2208 free(event->program_result);
2209 event->program_result = NULL;
2210 udev_event_apply_format(event, &rules->buf[cur->key.value_off], program, sizeof(program));
2211 envp = udev_device_get_properties_envp(event->dev);
2212 log_debug("PROGRAM '%s' %s:%u\n",
2214 &rules->buf[rule->rule.filename_off],
2215 rule->rule.filename_line);
2217 if (udev_event_spawn(event, program, envp, sigmask, result, sizeof(result)) < 0) {
2218 if (cur->key.op != OP_NOMATCH)
2223 util_remove_trailing_chars(result, '\n');
2224 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2225 count = util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
2227 log_debug("%i character(s) replaced\n" , count);
2229 event->program_result = strdup(result);
2230 if (cur->key.op == OP_NOMATCH)
2235 case TK_M_IMPORT_FILE: {
2236 char import[UTIL_PATH_SIZE];
2238 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2239 if (import_file_into_properties(event->dev, import) != 0)
2240 if (cur->key.op != OP_NOMATCH)
2244 case TK_M_IMPORT_PROG: {
2245 char import[UTIL_PATH_SIZE];
2247 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2248 log_debug("IMPORT '%s' %s:%u\n",
2250 &rules->buf[rule->rule.filename_off],
2251 rule->rule.filename_line);
2253 if (import_program_into_properties(event, import, sigmask) != 0)
2254 if (cur->key.op != OP_NOMATCH)
2258 case TK_M_IMPORT_BUILTIN: {
2259 char command[UTIL_PATH_SIZE];
2261 if (udev_builtin_run_once(cur->key.builtin_cmd)) {
2262 /* check if we ran already */
2263 if (event->builtin_run & (1 << cur->key.builtin_cmd)) {
2264 log_debug("IMPORT builtin skip '%s' %s:%u\n",
2265 udev_builtin_name(cur->key.builtin_cmd),
2266 &rules->buf[rule->rule.filename_off],
2267 rule->rule.filename_line);
2268 /* return the result from earlier run */
2269 if (event->builtin_ret & (1 << cur->key.builtin_cmd))
2270 if (cur->key.op != OP_NOMATCH)
2275 event->builtin_run |= (1 << cur->key.builtin_cmd);
2278 udev_event_apply_format(event, &rules->buf[cur->key.value_off], command, sizeof(command));
2279 log_debug("IMPORT builtin '%s' %s:%u\n",
2280 udev_builtin_name(cur->key.builtin_cmd),
2281 &rules->buf[rule->rule.filename_off],
2282 rule->rule.filename_line);
2284 if (udev_builtin_run(event->dev, cur->key.builtin_cmd, command, false) != 0) {
2285 /* remember failure */
2286 log_debug("IMPORT builtin '%s' returned non-zero\n",
2287 udev_builtin_name(cur->key.builtin_cmd));
2288 event->builtin_ret |= (1 << cur->key.builtin_cmd);
2289 if (cur->key.op != OP_NOMATCH)
2294 case TK_M_IMPORT_DB: {
2295 const char *key = &rules->buf[cur->key.value_off];
2298 value = udev_device_get_property_value(event->dev_db, key);
2299 if (value != NULL) {
2300 struct udev_list_entry *entry;
2302 entry = udev_device_add_property(event->dev, key, value);
2303 udev_list_entry_set_num(entry, true);
2305 if (cur->key.op != OP_NOMATCH)
2310 case TK_M_IMPORT_CMDLINE: {
2312 bool imported = false;
2314 f = fopen("/proc/cmdline", "re");
2318 if (fgets(cmdline, sizeof(cmdline), f) != NULL) {
2319 const char *key = &rules->buf[cur->key.value_off];
2322 pos = strstr(cmdline, key);
2324 struct udev_list_entry *entry;
2327 if (pos[0] == '\0' || isspace(pos[0])) {
2328 /* we import simple flags as 'FLAG=1' */
2329 entry = udev_device_add_property(event->dev, key, "1");
2330 udev_list_entry_set_num(entry, true);
2332 } else if (pos[0] == '=') {
2337 while (pos[0] != '\0' && !isspace(pos[0]))
2340 entry = udev_device_add_property(event->dev, key, value);
2341 udev_list_entry_set_num(entry, true);
2348 if (!imported && cur->key.op != OP_NOMATCH)
2352 case TK_M_IMPORT_PARENT: {
2353 char import[UTIL_PATH_SIZE];
2355 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2356 if (import_parent_into_properties(event->dev, import) != 0)
2357 if (cur->key.op != OP_NOMATCH)
2362 if (match_key(rules, cur, event->program_result) != 0)
2365 case TK_A_STRING_ESCAPE_NONE:
2368 case TK_A_STRING_ESCAPE_REPLACE:
2369 esc = ESCAPE_REPLACE;
2371 case TK_A_DB_PERSIST:
2372 udev_device_set_db_persist(event->dev);
2374 case TK_A_INOTIFY_WATCH:
2375 if (event->inotify_watch_final)
2377 if (cur->key.op == OP_ASSIGN_FINAL)
2378 event->inotify_watch_final = true;
2379 event->inotify_watch = cur->key.watch;
2381 case TK_A_DEVLINK_PRIO:
2382 udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
2385 char owner[UTIL_NAME_SIZE];
2387 if (event->owner_final)
2389 if (cur->key.op == OP_ASSIGN_FINAL)
2390 event->owner_final = true;
2391 udev_event_apply_format(event, &rules->buf[cur->key.value_off], owner, sizeof(owner));
2392 event->uid = util_lookup_user(event->udev, owner);
2393 log_debug("OWNER %u %s:%u\n",
2395 &rules->buf[rule->rule.filename_off],
2396 rule->rule.filename_line);
2400 char group[UTIL_NAME_SIZE];
2402 if (event->group_final)
2404 if (cur->key.op == OP_ASSIGN_FINAL)
2405 event->group_final = true;
2406 udev_event_apply_format(event, &rules->buf[cur->key.value_off], group, sizeof(group));
2407 event->gid = util_lookup_group(event->udev, group);
2408 log_debug("GROUP %u %s:%u\n",
2410 &rules->buf[rule->rule.filename_off],
2411 rule->rule.filename_line);
2415 char mode_str[UTIL_NAME_SIZE];
2419 if (event->mode_final)
2421 udev_event_apply_format(event, &rules->buf[cur->key.value_off], mode_str, sizeof(mode_str));
2422 mode = strtol(mode_str, &endptr, 8);
2423 if (endptr[0] != '\0') {
2424 log_error("ignoring invalid mode '%s'\n", mode_str);
2427 if (cur->key.op == OP_ASSIGN_FINAL)
2428 event->mode_final = true;
2429 event->mode_set = true;
2431 log_debug("MODE %#o %s:%u\n",
2433 &rules->buf[rule->rule.filename_off],
2434 rule->rule.filename_line);
2438 if (event->owner_final)
2440 if (cur->key.op == OP_ASSIGN_FINAL)
2441 event->owner_final = true;
2442 event->uid = cur->key.uid;
2443 log_debug("OWNER %u %s:%u\n",
2445 &rules->buf[rule->rule.filename_off],
2446 rule->rule.filename_line);
2449 if (event->group_final)
2451 if (cur->key.op == OP_ASSIGN_FINAL)
2452 event->group_final = true;
2453 event->gid = cur->key.gid;
2454 log_debug("GROUP %u %s:%u\n",
2456 &rules->buf[rule->rule.filename_off],
2457 rule->rule.filename_line);
2460 if (event->mode_final)
2462 if (cur->key.op == OP_ASSIGN_FINAL)
2463 event->mode_final = true;
2464 event->mode_set = true;
2465 event->mode = cur->key.mode;
2466 log_debug("MODE %#o %s:%u\n",
2468 &rules->buf[rule->rule.filename_off],
2469 rule->rule.filename_line);
2472 const char *name = &rules->buf[cur->key.attr_off];
2473 char *value = &rules->buf[cur->key.value_off];
2474 char value_new[UTIL_NAME_SIZE];
2475 const char *value_old = NULL;
2476 struct udev_list_entry *entry;
2478 if (value[0] == '\0') {
2479 if (cur->key.op == OP_ADD)
2481 udev_device_add_property(event->dev, name, NULL);
2485 if (cur->key.op == OP_ADD)
2486 value_old = udev_device_get_property_value(event->dev, name);
2488 char temp[UTIL_NAME_SIZE];
2490 /* append value separated by space */
2491 udev_event_apply_format(event, value, temp, sizeof(temp));
2492 util_strscpyl(value_new, sizeof(value_new), value_old, " ", temp, NULL);
2494 udev_event_apply_format(event, value, value_new, sizeof(value_new));
2496 entry = udev_device_add_property(event->dev, name, value_new);
2497 /* store in db, skip private keys */
2499 udev_list_entry_set_num(entry, true);
2503 char tag[UTIL_PATH_SIZE];
2506 udev_event_apply_format(event, &rules->buf[cur->key.value_off], tag, sizeof(tag));
2507 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2508 udev_device_cleanup_tags_list(event->dev);
2509 for (p = tag; *p != '\0'; p++) {
2510 if ((*p >= 'a' && *p <= 'z') ||
2511 (*p >= 'A' && *p <= 'Z') ||
2512 (*p >= '0' && *p <= '9') ||
2513 *p == '-' || *p == '_')
2515 log_error("ignoring invalid tag name '%s'\n", tag);
2518 udev_device_add_tag(event->dev, tag);
2522 const char *name = &rules->buf[cur->key.value_off];
2524 char name_str[UTIL_PATH_SIZE];
2527 if (event->name_final)
2529 if (cur->key.op == OP_ASSIGN_FINAL)
2530 event->name_final = true;
2531 udev_event_apply_format(event, name, name_str, sizeof(name_str));
2532 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2533 count = util_replace_chars(name_str, "/");
2535 log_debug("%i character(s) replaced\n", count);
2537 if (major(udev_device_get_devnum(event->dev)) &&
2538 (!streq(name_str, udev_device_get_devnode(event->dev) + strlen("/dev/")))) {
2539 log_error("NAME=\"%s\" ignored, kernel device nodes "
2540 "can not be renamed; please fix it in %s:%u\n", name,
2541 &rules->buf[rule->rule.filename_off], rule->rule.filename_line);
2545 event->name = strdup(name_str);
2546 log_debug("NAME '%s' %s:%u\n",
2548 &rules->buf[rule->rule.filename_off],
2549 rule->rule.filename_line);
2552 case TK_A_DEVLINK: {
2553 char temp[UTIL_PATH_SIZE];
2554 char filename[UTIL_PATH_SIZE];
2558 if (event->devlink_final)
2560 if (major(udev_device_get_devnum(event->dev)) == 0)
2562 if (cur->key.op == OP_ASSIGN_FINAL)
2563 event->devlink_final = true;
2564 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2565 udev_device_cleanup_devlinks_list(event->dev);
2567 /* allow multiple symlinks separated by spaces */
2568 udev_event_apply_format(event, &rules->buf[cur->key.value_off], temp, sizeof(temp));
2569 if (esc == ESCAPE_UNSET)
2570 count = util_replace_chars(temp, "/ ");
2571 else if (esc == ESCAPE_REPLACE)
2572 count = util_replace_chars(temp, "/");
2574 log_debug("%i character(s) replaced\n" , count);
2576 while (isspace(pos[0]))
2578 next = strchr(pos, ' ');
2579 while (next != NULL) {
2581 log_debug("LINK '%s' %s:%u\n", pos,
2582 &rules->buf[rule->rule.filename_off], rule->rule.filename_line);
2583 util_strscpyl(filename, sizeof(filename), "/dev/", pos, NULL);
2584 udev_device_add_devlink(event->dev, filename);
2585 while (isspace(next[1]))
2588 next = strchr(pos, ' ');
2590 if (pos[0] != '\0') {
2591 log_debug("LINK '%s' %s:%u\n", pos,
2592 &rules->buf[rule->rule.filename_off], rule->rule.filename_line);
2593 util_strscpyl(filename, sizeof(filename), "/dev/", pos, NULL);
2594 udev_device_add_devlink(event->dev, filename);
2599 const char *key_name = &rules->buf[cur->key.attr_off];
2600 char attr[UTIL_PATH_SIZE];
2601 char value[UTIL_NAME_SIZE];
2604 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0)
2605 util_strscpyl(attr, sizeof(attr), udev_device_get_syspath(event->dev), "/", key_name, NULL);
2606 attr_subst_subdir(attr, sizeof(attr));
2608 udev_event_apply_format(event, &rules->buf[cur->key.value_off], value, sizeof(value));
2609 log_debug("ATTR '%s' writing '%s' %s:%u\n", attr, value,
2610 &rules->buf[rule->rule.filename_off],
2611 rule->rule.filename_line);
2612 f = fopen(attr, "we");
2614 if (fprintf(f, "%s", value) <= 0)
2615 log_error("error writing ATTR{%s}: %m\n", attr);
2618 log_error("error opening ATTR{%s} for writing: %m\n", attr);
2622 case TK_A_RUN_BUILTIN:
2623 case TK_A_RUN_PROGRAM: {
2624 struct udev_list_entry *entry;
2626 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2627 udev_list_cleanup(&event->run_list);
2628 log_debug("RUN '%s' %s:%u\n",
2629 &rules->buf[cur->key.value_off],
2630 &rules->buf[rule->rule.filename_off],
2631 rule->rule.filename_line);
2632 entry = udev_list_entry_add(&event->run_list, &rules->buf[cur->key.value_off], NULL);
2633 udev_list_entry_set_num(entry, cur->key.builtin_cmd);
2637 if (cur->key.rule_goto == 0)
2639 cur = &rules->tokens[cur->key.rule_goto];
2644 case TK_M_PARENTS_MIN:
2645 case TK_M_PARENTS_MAX:
2648 log_error("wrong type %u\n", cur->type);
2655 /* fast-forward to next rule */
2656 cur = rule + rule->rule.token_count;
2660 void udev_rules_apply_static_dev_perms(struct udev_rules *rules)
2668 if (rules->tokens == NULL)
2671 cur = &rules->tokens[0];
2674 switch (cur->type) {
2679 /* skip rules without a static_node tag */
2680 if (!rule->rule.has_static_node)
2694 mode = cur->key.mode;
2696 case TK_A_STATIC_NODE: {
2697 char filename[UTIL_PATH_SIZE];
2700 /* we assure, that the permissions tokens are sorted before the static token */
2701 if (mode == 0 && uid == 0 && gid == 0)
2703 util_strscpyl(filename, sizeof(filename), "/dev/",
2704 &rules->buf[cur->key.value_off], NULL);
2705 if (stat(filename, &stats) != 0)
2707 if (!S_ISBLK(stats.st_mode) && !S_ISCHR(stats.st_mode))
2715 if (mode != (stats.st_mode & 01777)) {
2716 chmod(filename, mode);
2717 log_debug("chmod '%s' %#o\n", filename, mode);
2720 if ((uid != 0 && uid != stats.st_uid) || (gid != 0 && gid != stats.st_gid)) {
2721 chown(filename, uid, gid);
2722 log_debug("chown '%s' %u %u\n", filename, uid, gid);
2725 utimensat(AT_FDCWD, filename, NULL, 0);
2735 /* fast-forward to next rule */
2736 cur = rule + rule->rule.token_count;