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
40 unsigned int name_off;
48 /* this node's first child */
49 unsigned int child_idx;
50 /* the next child of our parent node's child list */
51 unsigned int next_child_idx;
52 /* this node's last child (shortcut for append) */
53 unsigned int last_child_idx;
54 unsigned int value_off;
55 unsigned short value_len;
63 /* every key in the rules file becomes a token */
65 unsigned int token_cur;
66 unsigned int token_max;
68 /* all key strings are copied to a single string buffer */
72 unsigned int buf_count;
74 /* during rule parsing, strings are indexed to find duplicates */
75 struct trie_node *trie_nodes;
76 unsigned int trie_nodes_cur;
77 unsigned int trie_nodes_max;
79 /* during rule parsing, uid/gid lookup results are cached */
81 unsigned int uids_cur;
82 unsigned int uids_max;
84 unsigned int gids_cur;
85 unsigned int gids_max;
88 /* KEY=="", KEY!="", KEY+="", KEY="", KEY:="" */
101 enum string_glob_type {
103 GL_PLAIN, /* no special chars */
104 GL_GLOB, /* shell globs ?,*,[] */
105 GL_SPLIT, /* multi-value A|B */
106 GL_SPLIT_GLOB, /* multi-value with glob A*|B* */
107 GL_SOMETHING, /* commonly used "?*" */
110 enum string_subst_type {
117 /* tokens of a rule are sorted/handled in this order */
122 TK_M_ACTION, /* val */
123 TK_M_DEVPATH, /* val */
124 TK_M_KERNEL, /* val */
125 TK_M_DEVLINK, /* val */
127 TK_M_ENV, /* val, attr */
129 TK_M_SUBSYSTEM, /* val */
130 TK_M_DRIVER, /* val */
131 TK_M_WAITFOR, /* val */
132 TK_M_ATTR, /* val, attr */
135 TK_M_KERNELS, /* val */
136 TK_M_SUBSYSTEMS, /* val */
137 TK_M_DRIVERS, /* val */
138 TK_M_ATTRS, /* val, attr */
142 TK_M_TEST, /* val, mode_t */
143 TK_M_EVENT_TIMEOUT, /* int */
144 TK_M_PROGRAM, /* val */
145 TK_M_IMPORT_FILE, /* val */
146 TK_M_IMPORT_PROG, /* val */
147 TK_M_IMPORT_BUILTIN, /* val */
148 TK_M_IMPORT_DB, /* val */
149 TK_M_IMPORT_CMDLINE, /* val */
150 TK_M_IMPORT_PARENT, /* val */
151 TK_M_RESULT, /* val */
154 TK_A_STRING_ESCAPE_NONE,
155 TK_A_STRING_ESCAPE_REPLACE,
157 TK_A_INOTIFY_WATCH, /* int */
158 TK_A_DEVLINK_PRIO, /* int */
159 TK_A_OWNER, /* val */
160 TK_A_GROUP, /* val */
162 TK_A_OWNER_ID, /* uid_t */
163 TK_A_GROUP_ID, /* gid_t */
164 TK_A_MODE_ID, /* mode_t */
165 TK_A_STATIC_NODE, /* val */
166 TK_A_ENV, /* val, attr */
169 TK_A_DEVLINK, /* val */
170 TK_A_ATTR, /* val, attr */
171 TK_A_RUN_BUILTIN, /* val, bool */
172 TK_A_RUN_PROGRAM, /* val, bool */
173 TK_A_GOTO, /* size_t */
178 /* we try to pack stuff in a way that we take only 12 bytes per token */
181 unsigned char type; /* same in rule and key */
183 enum token_type type:8;
185 bool has_static_node:1;
186 unsigned int unused:6;
187 unsigned short token_count;
188 unsigned int label_off;
189 unsigned short filename_off;
190 unsigned short filename_line;
193 enum token_type type:8;
194 enum operation_type op:8;
195 enum string_glob_type glob:8;
196 enum string_subst_type subst:4;
197 enum string_subst_type attrsubst:4;
198 unsigned int value_off;
200 unsigned int attr_off;
202 unsigned int rule_goto;
209 enum udev_builtin_cmd builtin_cmd;
217 struct udev_rules *rules;
219 struct token token[MAX_TK];
220 unsigned int token_cur;
224 static const char *operation_str(enum operation_type type)
226 static const char *operation_strs[] = {
227 [OP_UNSET] = "UNSET",
228 [OP_MATCH] = "match",
229 [OP_NOMATCH] = "nomatch",
230 [OP_MATCH_MAX] = "MATCH_MAX",
233 [OP_ASSIGN] = "assign",
234 [OP_ASSIGN_FINAL] = "assign-final",
237 return operation_strs[type];
240 static const char *string_glob_str(enum string_glob_type type)
242 static const char *string_glob_strs[] = {
243 [GL_UNSET] = "UNSET",
244 [GL_PLAIN] = "plain",
246 [GL_SPLIT] = "split",
247 [GL_SPLIT_GLOB] = "split-glob",
248 [GL_SOMETHING] = "split-glob",
251 return string_glob_strs[type];
254 static const char *token_str(enum token_type type)
256 static const char *token_strs[] = {
257 [TK_UNSET] = "UNSET",
260 [TK_M_ACTION] = "M ACTION",
261 [TK_M_DEVPATH] = "M DEVPATH",
262 [TK_M_KERNEL] = "M KERNEL",
263 [TK_M_DEVLINK] = "M DEVLINK",
264 [TK_M_NAME] = "M NAME",
265 [TK_M_ENV] = "M ENV",
266 [TK_M_TAG] = "M TAG",
267 [TK_M_SUBSYSTEM] = "M SUBSYSTEM",
268 [TK_M_DRIVER] = "M DRIVER",
269 [TK_M_WAITFOR] = "M WAITFOR",
270 [TK_M_ATTR] = "M ATTR",
272 [TK_M_PARENTS_MIN] = "M PARENTS_MIN",
273 [TK_M_KERNELS] = "M KERNELS",
274 [TK_M_SUBSYSTEMS] = "M SUBSYSTEMS",
275 [TK_M_DRIVERS] = "M DRIVERS",
276 [TK_M_ATTRS] = "M ATTRS",
277 [TK_M_TAGS] = "M TAGS",
278 [TK_M_PARENTS_MAX] = "M PARENTS_MAX",
280 [TK_M_TEST] = "M TEST",
281 [TK_M_EVENT_TIMEOUT] = "M EVENT_TIMEOUT",
282 [TK_M_PROGRAM] = "M PROGRAM",
283 [TK_M_IMPORT_FILE] = "M IMPORT_FILE",
284 [TK_M_IMPORT_PROG] = "M IMPORT_PROG",
285 [TK_M_IMPORT_BUILTIN] = "M IMPORT_BUILTIN",
286 [TK_M_IMPORT_DB] = "M IMPORT_DB",
287 [TK_M_IMPORT_CMDLINE] = "M IMPORT_CMDLINE",
288 [TK_M_IMPORT_PARENT] = "M IMPORT_PARENT",
289 [TK_M_RESULT] = "M RESULT",
290 [TK_M_MAX] = "M MAX",
292 [TK_A_STRING_ESCAPE_NONE] = "A STRING_ESCAPE_NONE",
293 [TK_A_STRING_ESCAPE_REPLACE] = "A STRING_ESCAPE_REPLACE",
294 [TK_A_DB_PERSIST] = "A DB_PERSIST",
295 [TK_A_INOTIFY_WATCH] = "A INOTIFY_WATCH",
296 [TK_A_DEVLINK_PRIO] = "A DEVLINK_PRIO",
297 [TK_A_OWNER] = "A OWNER",
298 [TK_A_GROUP] = "A GROUP",
299 [TK_A_MODE] = "A MODE",
300 [TK_A_OWNER_ID] = "A OWNER_ID",
301 [TK_A_GROUP_ID] = "A GROUP_ID",
302 [TK_A_STATIC_NODE] = "A STATIC_NODE",
303 [TK_A_MODE_ID] = "A MODE_ID",
304 [TK_A_ENV] = "A ENV",
305 [TK_A_TAG] = "A ENV",
306 [TK_A_NAME] = "A NAME",
307 [TK_A_DEVLINK] = "A DEVLINK",
308 [TK_A_ATTR] = "A ATTR",
309 [TK_A_RUN_BUILTIN] = "A RUN_BUILTIN",
310 [TK_A_RUN_PROGRAM] = "A RUN_PROGRAM",
311 [TK_A_GOTO] = "A GOTO",
316 return token_strs[type];
319 static void dump_token(struct udev_rules *rules, struct token *token)
321 enum token_type type = token->type;
322 enum operation_type op = token->key.op;
323 enum string_glob_type glob = token->key.glob;
324 const char *value = &rules->buf[token->key.value_off];
325 const char *attr = &rules->buf[token->key.attr_off];
330 const char *tks_ptr = (char *)rules->tokens;
331 const char *tk_ptr = (char *)token;
332 unsigned int idx = (tk_ptr - tks_ptr) / sizeof(struct token);
334 log_debug("* RULE %s:%u, token: %u, count: %u, label: '%s'\n",
335 &rules->buf[token->rule.filename_off], token->rule.filename_line,
336 idx, token->rule.token_count,
337 &rules->buf[token->rule.label_off]);
349 case TK_M_SUBSYSTEMS:
353 case TK_M_IMPORT_FILE:
354 case TK_M_IMPORT_PROG:
356 case TK_M_IMPORT_CMDLINE:
357 case TK_M_IMPORT_PARENT:
364 case TK_A_RUN_BUILTIN:
365 case TK_A_RUN_PROGRAM:
366 log_debug("%s %s '%s'(%s)\n",
367 token_str(type), operation_str(op), value, string_glob_str(glob));
369 case TK_M_IMPORT_BUILTIN:
370 log_debug("%s %i '%s'\n", token_str(type), token->key.builtin_cmd, value);
377 log_debug("%s %s '%s' '%s'(%s)\n",
378 token_str(type), operation_str(op), attr, value, string_glob_str(glob));
382 log_debug("%s %s '%s'\n", token_str(type), operation_str(op), value);
384 case TK_A_STRING_ESCAPE_NONE:
385 case TK_A_STRING_ESCAPE_REPLACE:
386 case TK_A_DB_PERSIST:
387 log_debug("%s\n", token_str(type));
390 log_debug("%s %s '%s'(%s) %#o\n",
391 token_str(type), operation_str(op), value, string_glob_str(glob), token->key.mode);
393 case TK_A_INOTIFY_WATCH:
394 log_debug("%s %u\n", token_str(type), token->key.watch);
396 case TK_A_DEVLINK_PRIO:
397 log_debug("%s %u\n", token_str(type), token->key.devlink_prio);
400 log_debug("%s %s %u\n", token_str(type), operation_str(op), token->key.uid);
403 log_debug("%s %s %u\n", token_str(type), operation_str(op), token->key.gid);
406 log_debug("%s %s %#o\n", token_str(type), operation_str(op), token->key.mode);
408 case TK_A_STATIC_NODE:
409 log_debug("%s '%s'\n", token_str(type), value);
411 case TK_M_EVENT_TIMEOUT:
412 log_debug("%s %u\n", token_str(type), token->key.event_timeout);
415 log_debug("%s '%s' %u\n", token_str(type), value, token->key.rule_goto);
418 log_debug("* %s\n", token_str(type));
420 case TK_M_PARENTS_MIN:
421 case TK_M_PARENTS_MAX:
424 log_debug("unknown type %u\n", type);
429 static void dump_rules(struct udev_rules *rules)
433 log_debug("dumping %u (%zu bytes) tokens, %u (%zu bytes) strings\n",
435 rules->token_cur * sizeof(struct token),
438 for(i = 0; i < rules->token_cur; i++)
439 dump_token(rules, &rules->tokens[i]);
442 static inline const char *operation_str(enum operation_type type) { return NULL; }
443 static inline const char *token_str(enum token_type type) { return NULL; }
444 static inline void dump_token(struct udev_rules *rules, struct token *token) {}
445 static inline void dump_rules(struct udev_rules *rules) {}
448 static int add_new_string(struct udev_rules *rules, const char *str, size_t bytes)
452 /* grow buffer if needed */
453 if (rules->buf_cur + bytes+1 >= rules->buf_max) {
457 /* double the buffer size */
458 add = rules->buf_max;
462 buf = realloc(rules->buf, rules->buf_max + add);
466 rules->buf_max += add;
468 off = rules->buf_cur;
469 memcpy(&rules->buf[rules->buf_cur], str, bytes);
470 rules->buf_cur += bytes;
475 static int add_string(struct udev_rules *rules, const char *str)
477 unsigned int node_idx;
478 struct trie_node *new_node;
479 unsigned int new_node_idx;
484 struct trie_node *parent;
486 /* walk trie, start from last character of str to find matching tails */
490 for (depth = 0; depth <= len; depth++) {
491 struct trie_node *node;
492 unsigned int child_idx;
494 node = &rules->trie_nodes[node_idx];
495 off = node->value_off + node->value_len - len;
497 /* match against current node */
498 if (depth == len || (node->value_len >= len && memcmp(&rules->buf[off], str, len) == 0))
501 /* lookup child node */
502 key = str[len - 1 - depth];
503 child_idx = node->child_idx;
504 while (child_idx > 0) {
505 struct trie_node *child;
507 child = &rules->trie_nodes[child_idx];
508 if (child->key == key)
510 child_idx = child->next_child_idx;
514 node_idx = child_idx;
517 /* string not found, add it */
518 off = add_new_string(rules, str, len + 1);
520 /* grow trie nodes if needed */
521 if (rules->trie_nodes_cur >= rules->trie_nodes_max) {
522 struct trie_node *nodes;
525 /* double the buffer size */
526 add = rules->trie_nodes_max;
530 nodes = realloc(rules->trie_nodes, (rules->trie_nodes_max + add) * sizeof(struct trie_node));
533 rules->trie_nodes = nodes;
534 rules->trie_nodes_max += add;
538 new_node_idx = rules->trie_nodes_cur;
539 rules->trie_nodes_cur++;
540 new_node = &rules->trie_nodes[new_node_idx];
541 memset(new_node, 0x00, sizeof(struct trie_node));
542 new_node->value_off = off;
543 new_node->value_len = len;
546 /* join the parent's child list */
547 parent = &rules->trie_nodes[node_idx];
548 if (parent->child_idx == 0) {
549 parent->child_idx = new_node_idx;
551 struct trie_node *last_child;
553 last_child = &rules->trie_nodes[parent->last_child_idx];
554 last_child->next_child_idx = new_node_idx;
556 parent->last_child_idx = new_node_idx;
560 static int add_token(struct udev_rules *rules, struct token *token)
562 /* grow buffer if needed */
563 if (rules->token_cur+1 >= rules->token_max) {
564 struct token *tokens;
567 /* double the buffer size */
568 add = rules->token_max;
572 tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
575 rules->tokens = tokens;
576 rules->token_max += add;
578 memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
583 static uid_t add_uid(struct udev_rules *rules, const char *owner)
589 /* lookup, if we know it already */
590 for (i = 0; i < rules->uids_cur; i++) {
591 off = rules->uids[i].name_off;
592 if (strcmp(&rules->buf[off], owner) == 0) {
593 uid = rules->uids[i].uid;
597 uid = util_lookup_user(rules->udev, owner);
599 /* grow buffer if needed */
600 if (rules->uids_cur+1 >= rules->uids_max) {
601 struct uid_gid *uids;
604 /* double the buffer size */
605 add = rules->uids_max;
609 uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
613 rules->uids_max += add;
615 rules->uids[rules->uids_cur].uid = uid;
616 off = add_string(rules, owner);
619 rules->uids[rules->uids_cur].name_off = off;
624 static gid_t add_gid(struct udev_rules *rules, const char *group)
630 /* lookup, if we know it already */
631 for (i = 0; i < rules->gids_cur; i++) {
632 off = rules->gids[i].name_off;
633 if (strcmp(&rules->buf[off], group) == 0) {
634 gid = rules->gids[i].gid;
638 gid = util_lookup_group(rules->udev, group);
640 /* grow buffer if needed */
641 if (rules->gids_cur+1 >= rules->gids_max) {
642 struct uid_gid *gids;
645 /* double the buffer size */
646 add = rules->gids_max;
650 gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid));
654 rules->gids_max += add;
656 rules->gids[rules->gids_cur].gid = gid;
657 off = add_string(rules, group);
660 rules->gids[rules->gids_cur].name_off = off;
665 static int import_property_from_string(struct udev_device *dev, char *line)
667 struct udev *udev = udev_device_get_udev(dev);
674 while (isspace(key[0]))
677 /* comment or empty line */
678 if (key[0] == '#' || key[0] == '\0')
681 /* split key/value */
682 val = strchr(key, '=');
689 while (isspace(val[0]))
696 while (isspace(key[len-1]))
700 /* terminate value */
704 while (isspace(val[len-1]))
712 if (val[0] == '"' || val[0] == '\'') {
713 if (val[len-1] != val[0]) {
714 log_debug("inconsistent quoting: '%s', skip\n", line);
721 /* handle device, renamed by external tool, returning new path */
722 if (strcmp(key, "DEVPATH") == 0) {
723 char syspath[UTIL_PATH_SIZE];
725 log_debug("updating devpath from '%s' to '%s'\n",
726 udev_device_get_devpath(dev), val);
727 util_strscpyl(syspath, sizeof(syspath), udev_get_sys_path(udev), val, NULL);
728 udev_device_set_syspath(dev, syspath);
730 struct udev_list_entry *entry;
732 entry = udev_device_add_property(dev, key, val);
733 /* store in db, skip private keys */
735 udev_list_entry_set_num(entry, true);
740 static int import_file_into_properties(struct udev_device *dev, const char *filename)
743 char line[UTIL_LINE_SIZE];
745 f = fopen(filename, "r");
748 while (fgets(line, sizeof(line), f) != NULL)
749 import_property_from_string(dev, line);
754 static int import_program_into_properties(struct udev_event *event, const char *program, const sigset_t *sigmask)
756 struct udev_device *dev = event->dev;
758 char result[UTIL_LINE_SIZE];
762 envp = udev_device_get_properties_envp(dev);
763 err = udev_event_spawn(event, program, envp, sigmask, result, sizeof(result));
768 while (line != NULL) {
771 pos = strchr(line, '\n');
776 import_property_from_string(dev, line);
782 static int import_parent_into_properties(struct udev_device *dev, const char *filter)
784 struct udev_device *dev_parent;
785 struct udev_list_entry *list_entry;
787 dev_parent = udev_device_get_parent(dev);
788 if (dev_parent == NULL)
791 udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
792 const char *key = udev_list_entry_get_name(list_entry);
793 const char *val = udev_list_entry_get_value(list_entry);
795 if (fnmatch(filter, key, 0) == 0) {
796 struct udev_list_entry *entry;
798 entry = udev_device_add_property(dev, key, val);
799 /* store in db, skip private keys */
801 udev_list_entry_set_num(entry, true);
807 #define WAIT_LOOP_PER_SECOND 50
808 static int wait_for_file(struct udev_device *dev, const char *file, int timeout)
810 struct udev *udev = udev_device_get_udev(dev);
811 char filepath[UTIL_PATH_SIZE];
812 char devicepath[UTIL_PATH_SIZE];
814 int loop = timeout * WAIT_LOOP_PER_SECOND;
816 /* a relative path is a device attribute */
817 devicepath[0] = '\0';
818 if (file[0] != '/') {
819 util_strscpyl(devicepath, sizeof(devicepath),
820 udev_get_sys_path(udev), udev_device_get_devpath(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:
1026 token->key.value_off = add_string(rule_tmp->rules, value);
1028 case TK_M_IMPORT_BUILTIN:
1029 token->key.value_off = add_string(rule_tmp->rules, value);
1030 token->key.builtin_cmd = *(enum udev_builtin_cmd *)data;
1038 token->key.value_off = add_string(rule_tmp->rules, value);
1039 token->key.attr_off = add_string(rule_tmp->rules, attr);
1042 token->key.value_off = add_string(rule_tmp->rules, value);
1043 token->key.devlink_unique = *(int *)data;
1046 token->key.value_off = add_string(rule_tmp->rules, value);
1048 token->key.mode = *(mode_t *)data;
1050 case TK_A_STRING_ESCAPE_NONE:
1051 case TK_A_STRING_ESCAPE_REPLACE:
1052 case TK_A_DB_PERSIST:
1054 case TK_A_RUN_BUILTIN:
1055 case TK_A_RUN_PROGRAM:
1056 token->key.builtin_cmd = *(enum udev_builtin_cmd *)data;
1057 token->key.value_off = add_string(rule_tmp->rules, value);
1059 case TK_A_INOTIFY_WATCH:
1060 case TK_A_DEVLINK_PRIO:
1061 token->key.devlink_prio = *(int *)data;
1064 token->key.uid = *(uid_t *)data;
1067 token->key.gid = *(gid_t *)data;
1070 token->key.mode = *(mode_t *)data;
1072 case TK_A_STATIC_NODE:
1073 token->key.value_off = add_string(rule_tmp->rules, value);
1075 case TK_M_EVENT_TIMEOUT:
1076 token->key.event_timeout = *(int *)data;
1079 case TK_M_PARENTS_MIN:
1080 case TK_M_PARENTS_MAX:
1084 log_error("wrong type %u\n", type);
1088 if (value != NULL && type < TK_M_MAX) {
1089 /* check if we need to split or call fnmatch() while matching rules */
1090 enum string_glob_type glob;
1094 has_split = (strchr(value, '|') != NULL);
1095 has_glob = (strchr(value, '*') != NULL || strchr(value, '?') != NULL || strchr(value, '[') != NULL);
1096 if (has_split && has_glob) {
1097 glob = GL_SPLIT_GLOB;
1098 } else if (has_split) {
1100 } else if (has_glob) {
1101 if (strcmp(value, "?*") == 0)
1102 glob = GL_SOMETHING;
1108 token->key.glob = glob;
1111 if (value != NULL && type > TK_M_MAX) {
1112 /* check if assigned value has substitution chars */
1113 if (value[0] == '[')
1114 token->key.subst = SB_SUBSYS;
1115 else if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
1116 token->key.subst = SB_FORMAT;
1118 token->key.subst = SB_NONE;
1122 /* check if property/attribut name has substitution chars */
1124 token->key.attrsubst = SB_SUBSYS;
1125 else if (strchr(attr, '%') != NULL || strchr(attr, '$') != NULL)
1126 token->key.attrsubst = SB_FORMAT;
1128 token->key.attrsubst = SB_NONE;
1131 token->key.type = type;
1133 rule_tmp->token_cur++;
1134 if (rule_tmp->token_cur >= ARRAY_SIZE(rule_tmp->token)) {
1135 log_error("temporary rule array too small\n");
1141 static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp)
1144 unsigned int start = 0;
1145 unsigned int end = rule_tmp->token_cur;
1147 for (i = 0; i < rule_tmp->token_cur; i++) {
1148 enum token_type next_val = TK_UNSET;
1149 unsigned int next_idx = 0;
1152 /* find smallest value */
1153 for (j = start; j < end; j++) {
1154 if (rule_tmp->token[j].type == TK_UNSET)
1156 if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
1157 next_val = rule_tmp->token[j].type;
1162 /* add token and mark done */
1163 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
1165 rule_tmp->token[next_idx].type = TK_UNSET;
1168 if (next_idx == start)
1170 if (next_idx+1 == end)
1176 static int add_rule(struct udev_rules *rules, char *line,
1177 const char *filename, unsigned int filename_off, unsigned int lineno)
1181 struct rule_tmp rule_tmp;
1183 memset(&rule_tmp, 0x00, sizeof(struct rule_tmp));
1184 rule_tmp.rules = rules;
1185 rule_tmp.rule.type = TK_RULE;
1186 rule_tmp.rule.rule.filename_off = filename_off;
1187 rule_tmp.rule.rule.filename_line = lineno;
1193 enum operation_type op;
1195 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0)
1198 if (strcmp(key, "ACTION") == 0) {
1199 if (op > OP_MATCH_MAX) {
1200 log_error("invalid ACTION operation\n");
1203 rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL);
1207 if (strcmp(key, "DEVPATH") == 0) {
1208 if (op > OP_MATCH_MAX) {
1209 log_error("invalid DEVPATH operation\n");
1212 rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
1216 if (strcmp(key, "KERNEL") == 0) {
1217 if (op > OP_MATCH_MAX) {
1218 log_error("invalid KERNEL operation\n");
1221 rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL);
1225 if (strcmp(key, "SUBSYSTEM") == 0) {
1226 if (op > OP_MATCH_MAX) {
1227 log_error("invalid SUBSYSTEM operation\n");
1230 /* bus, class, subsystem events should all be the same */
1231 if (strcmp(value, "subsystem") == 0 ||
1232 strcmp(value, "bus") == 0 ||
1233 strcmp(value, "class") == 0) {
1234 if (strcmp(value, "bus") == 0 || strcmp(value, "class") == 0)
1235 log_error("'%s' must be specified as 'subsystem' \n"
1236 "please fix it in %s:%u", value, filename, lineno);
1237 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
1239 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
1243 if (strcmp(key, "DRIVER") == 0) {
1244 if (op > OP_MATCH_MAX) {
1245 log_error("invalid DRIVER operation\n");
1248 rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL);
1252 if (strncmp(key, "ATTR{", sizeof("ATTR{")-1) == 0) {
1253 attr = get_key_attribute(rules->udev, key + sizeof("ATTR")-1);
1255 log_error("error parsing ATTR attribute\n");
1258 if (op < OP_MATCH_MAX) {
1259 rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
1261 rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr);
1266 if (strcmp(key, "KERNELS") == 0) {
1267 if (op > OP_MATCH_MAX) {
1268 log_error("invalid KERNELS operation\n");
1271 rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1275 if (strcmp(key, "SUBSYSTEMS") == 0) {
1276 if (op > OP_MATCH_MAX) {
1277 log_error("invalid SUBSYSTEMS operation\n");
1280 rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1284 if (strcmp(key, "DRIVERS") == 0) {
1285 if (op > OP_MATCH_MAX) {
1286 log_error("invalid DRIVERS operation\n");
1289 rule_add_key(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
1293 if (strncmp(key, "ATTRS{", sizeof("ATTRS{")-1) == 0) {
1294 if (op > OP_MATCH_MAX) {
1295 log_error("invalid ATTRS operation\n");
1298 attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
1300 log_error("error parsing ATTRS attribute\n");
1303 if (strncmp(attr, "device/", 7) == 0)
1304 log_error("the 'device' link may not be available in a future kernel, "
1305 "please fix it in %s:%u", filename, lineno);
1306 else if (strstr(attr, "../") != NULL)
1307 log_error("do not reference parent sysfs directories directly, "
1308 "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
1309 rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1313 if (strcmp(key, "TAGS") == 0) {
1314 if (op > OP_MATCH_MAX) {
1315 log_error("invalid TAGS operation\n");
1318 rule_add_key(&rule_tmp, TK_M_TAGS, op, value, NULL);
1322 if (strncmp(key, "ENV{", sizeof("ENV{")-1) == 0) {
1323 attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1);
1325 log_error("error parsing ENV attribute\n");
1328 if (op < OP_MATCH_MAX) {
1329 if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
1332 static const char *blacklist[] = {
1347 for (i = 0; i < ARRAY_SIZE(blacklist); i++)
1348 if (strcmp(attr, blacklist[i]) == 0) {
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 (strcmp(key, "TAG") == 0) {
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 (strcmp(key, "PROGRAM") == 0) {
1367 rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
1371 if (strcmp(key, "RESULT") == 0) {
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 (strncmp(key, "IMPORT", sizeof("IMPORT")-1) == 0) {
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 (strcmp(attr, "program") == 0) {
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 (strcmp(attr, "builtin") == 0) {
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 (strcmp(attr, "file") == 0) {
1408 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1409 } else if (strcmp(attr, "db") == 0) {
1410 rule_add_key(&rule_tmp, TK_M_IMPORT_DB, op, value, NULL);
1411 } else if (strcmp(attr, "cmdline") == 0) {
1412 rule_add_key(&rule_tmp, TK_M_IMPORT_CMDLINE, op, value, NULL);
1413 } else if (strcmp(attr, "parent") == 0) {
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 (strncmp(key, "TEST", sizeof("TEST")-1) == 0) {
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 (strncmp(key, "RUN", sizeof("RUN")-1) == 0) {
1438 attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1);
1442 if (strcmp(attr, "builtin") == 0) {
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 (strcmp(attr, "program") == 0) {
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 (strcmp(key, "WAIT_FOR") == 0 || strcmp(key, "WAIT_FOR_SYSFS") == 0) {
1461 rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1465 if (strcmp(key, "LABEL") == 0) {
1466 rule_tmp.rule.rule.label_off = add_string(rules, value);
1470 if (strcmp(key, "GOTO") == 0) {
1471 rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1475 if (strncmp(key, "NAME", sizeof("NAME")-1) == 0) {
1476 if (op < OP_MATCH_MAX) {
1477 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
1479 if (strcmp(value, "%k") == 0) {
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 (strncmp(key, "SYMLINK", sizeof("SYMLINK")-1) == 0) {
1496 if (op < OP_MATCH_MAX) {
1497 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
1501 attr = get_key_attribute(rules->udev, key + sizeof("SYMLINK")-1);
1502 if (attr != NULL && strstr(attr, "unique") != NULL)
1504 rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, &flag);
1506 rule_tmp.rule.rule.can_set_name = true;
1510 if (strcmp(key, "OWNER") == 0) {
1514 uid = strtoul(value, &endptr, 10);
1515 if (endptr[0] == '\0') {
1516 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1517 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1518 uid = add_uid(rules, value);
1519 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1520 } else if (rules->resolve_names >= 0) {
1521 rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
1523 rule_tmp.rule.rule.can_set_name = true;
1527 if (strcmp(key, "GROUP") == 0) {
1531 gid = strtoul(value, &endptr, 10);
1532 if (endptr[0] == '\0') {
1533 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1534 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1535 gid = add_gid(rules, value);
1536 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1537 } else if (rules->resolve_names >= 0) {
1538 rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
1540 rule_tmp.rule.rule.can_set_name = true;
1544 if (strcmp(key, "MODE") == 0) {
1548 mode = strtol(value, &endptr, 8);
1549 if (endptr[0] == '\0')
1550 rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1552 rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
1553 rule_tmp.rule.rule.can_set_name = true;
1557 if (strcmp(key, "OPTIONS") == 0) {
1560 pos = strstr(value, "link_priority=");
1562 int prio = atoi(&pos[strlen("link_priority=")]);
1564 rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, op, NULL, &prio);
1567 pos = strstr(value, "event_timeout=");
1569 int tout = atoi(&pos[strlen("event_timeout=")]);
1571 rule_add_key(&rule_tmp, TK_M_EVENT_TIMEOUT, op, NULL, &tout);
1574 pos = strstr(value, "string_escape=");
1576 pos = &pos[strlen("string_escape=")];
1577 if (strncmp(pos, "none", strlen("none")) == 0)
1578 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, op, NULL, NULL);
1579 else if (strncmp(pos, "replace", strlen("replace")) == 0)
1580 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, op, NULL, NULL);
1583 pos = strstr(value, "db_persist");
1585 rule_add_key(&rule_tmp, TK_A_DB_PERSIST, op, NULL, NULL);
1587 pos = strstr(value, "nowatch");
1591 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &off);
1593 pos = strstr(value, "watch");
1597 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &on);
1601 pos = strstr(value, "static_node=");
1603 rule_add_key(&rule_tmp, TK_A_STATIC_NODE, op, &pos[strlen("static_node=")], NULL);
1604 rule_tmp.rule.rule.has_static_node = true;
1610 log_error("unknown key '%s' in %s:%u\n", key, filename, lineno);
1614 /* add rule token */
1615 rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur;
1616 if (add_token(rules, &rule_tmp.rule) != 0)
1619 /* add tokens to list, sorted by type */
1620 if (sort_token(rules, &rule_tmp) != 0)
1625 log_error("invalid rule '%s:%u'\n", filename, lineno);
1629 static int parse_file(struct udev_rules *rules, const char *filename, unsigned short filename_off)
1632 unsigned int first_token;
1633 char line[UTIL_LINE_SIZE];
1637 log_debug("reading '%s' as rules file\n", filename);
1639 f = fopen(filename, "r");
1643 first_token = rules->token_cur;
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 (strcmp(label, &rules->buf[rules->tokens[j].rule.label_off]) != 0)
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 static int add_matching_files(struct udev *udev, struct udev_list *file_list, const char *dirname, const char *suffix)
1707 struct dirent *dent;
1708 char filename[UTIL_PATH_SIZE];
1710 dir = opendir(dirname);
1712 log_debug("unable to open '%s': %m\n", dirname);
1716 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
1717 if (dent->d_name[0] == '.')
1720 /* look for file matching with specified suffix */
1721 if (suffix != NULL) {
1724 ext = strrchr(dent->d_name, '.');
1727 if (strcmp(ext, suffix) != 0)
1730 util_strscpyl(filename, sizeof(filename), dirname, "/", dent->d_name, NULL);
1732 * the basename is the key, the filename the value
1733 * identical basenames from different directories override each other
1734 * entries are sorted after basename
1736 udev_list_entry_add(file_list, dent->d_name, filename);
1743 struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
1745 struct udev_rules *rules;
1746 struct udev_list file_list;
1747 struct udev_list_entry *file_loop;
1748 struct token end_token;
1751 rules = calloc(1, sizeof(struct udev_rules));
1755 rules->resolve_names = resolve_names;
1756 udev_list_init(udev, &file_list, true);
1758 /* init token array and string buffer */
1759 rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
1760 if (rules->tokens == NULL) {
1764 rules->token_max = PREALLOC_TOKEN;
1766 rules->buf = malloc(PREALLOC_STRBUF);
1767 if (rules->buf == NULL) {
1768 free(rules->tokens);
1772 rules->buf_max = PREALLOC_STRBUF;
1773 /* offset 0 is always '\0' */
1774 rules->buf[0] = '\0';
1777 rules->trie_nodes = malloc(PREALLOC_TRIE * sizeof(struct trie_node));
1778 if (rules->trie_nodes == NULL) {
1780 free(rules->tokens);
1784 rules->trie_nodes_max = PREALLOC_TRIE;
1785 /* offset 0 is the trie root, with an empty string */
1786 memset(rules->trie_nodes, 0x00, sizeof(struct trie_node));
1787 rules->trie_nodes_cur = 1;
1789 for (udev_get_rules_path(udev, &s, NULL); *s != NULL; s++)
1790 add_matching_files(udev, &file_list, *s, ".rules");
1792 /* add all filenames to the string buffer */
1793 udev_list_entry_foreach(file_loop, udev_list_get_entry(&file_list)) {
1794 const char *filename = udev_list_entry_get_value(file_loop);
1795 unsigned int filename_off;
1797 filename_off = add_string(rules, filename);
1798 /* the offset in the rule is limited to unsigned short */
1799 if (filename_off < USHRT_MAX)
1800 udev_list_entry_set_num(file_loop, filename_off);
1803 /* parse all rules files */
1804 udev_list_entry_foreach(file_loop, udev_list_get_entry(&file_list)) {
1805 const char *filename = udev_list_entry_get_value(file_loop);
1806 unsigned int filename_off = udev_list_entry_get_num(file_loop);
1809 if (stat(filename, &st) != 0) {
1810 log_error("can not find '%s': %m\n", filename);
1813 if (S_ISREG(st.st_mode) && st.st_size <= 0) {
1814 log_debug("ignore empty '%s'\n", filename);
1817 if (S_ISCHR(st.st_mode)) {
1818 log_debug("ignore masked '%s'\n", filename);
1821 parse_file(rules, filename, filename_off);
1823 udev_list_cleanup(&file_list);
1825 memset(&end_token, 0x00, sizeof(struct token));
1826 end_token.type = TK_END;
1827 add_token(rules, &end_token);
1829 /* shrink allocated token and string buffer */
1830 if (rules->token_cur < rules->token_max) {
1831 struct token *tokens;
1833 tokens = realloc(rules->tokens, rules->token_cur * sizeof(struct token));
1834 if (tokens != NULL || rules->token_cur == 0) {
1835 rules->tokens = tokens;
1836 rules->token_max = rules->token_cur;
1839 if (rules->buf_cur < rules->buf_max) {
1842 buf = realloc(rules->buf, rules->buf_cur);
1843 if (buf != NULL || rules->buf_cur == 0) {
1845 rules->buf_max = rules->buf_cur;
1848 log_debug("rules use %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1849 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1850 log_debug("temporary index used %zu bytes (%u * %zu bytes)\n",
1851 rules->trie_nodes_cur * sizeof(struct trie_node),
1852 rules->trie_nodes_cur, sizeof(struct trie_node));
1855 free(rules->trie_nodes);
1856 rules->trie_nodes = NULL;
1857 rules->trie_nodes_cur = 0;
1858 rules->trie_nodes_max = 0;
1860 /* cleanup uid/gid cache */
1863 rules->uids_cur = 0;
1864 rules->uids_max = 0;
1867 rules->gids_cur = 0;
1868 rules->gids_max = 0;
1874 struct udev_rules *udev_rules_unref(struct udev_rules *rules)
1878 free(rules->tokens);
1880 free(rules->trie_nodes);
1887 static int match_key(struct udev_rules *rules, struct token *token, const char *val)
1889 char *key_value = &rules->buf[token->key.value_off];
1896 switch (token->key.glob) {
1898 match = (strcmp(key_value, val) == 0);
1901 match = (fnmatch(key_value, val, 0) == 0);
1908 split = &rules->buf[token->key.value_off];
1913 next = strchr(split, '|');
1915 size_t matchlen = (size_t)(next - split);
1917 match = (matchlen == len && strncmp(split, val, matchlen) == 0);
1921 match = (strcmp(split, val) == 0);
1930 char value[UTIL_PATH_SIZE];
1932 util_strscpy(value, sizeof(value), &rules->buf[token->key.value_off]);
1934 while (key_value != NULL) {
1935 pos = strchr(key_value, '|');
1940 match = (fnmatch(key_value, val, 0) == 0);
1948 match = (val[0] != '\0');
1954 if (match && (token->key.op == OP_MATCH))
1956 if (!match && (token->key.op == OP_NOMATCH))
1961 static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur)
1964 char nbuf[UTIL_NAME_SIZE];
1966 char vbuf[UTIL_NAME_SIZE];
1969 name = &rules->buf[cur->key.attr_off];
1970 switch (cur->key.attrsubst) {
1972 udev_event_apply_format(event, name, nbuf, sizeof(nbuf));
1976 value = udev_device_get_sysattr_value(dev, name);
1981 if (util_resolve_subsys_kernel(event->udev, name, vbuf, sizeof(vbuf), 1) != 0)
1989 /* remove trailing whitespace, if not asked to match for it */
1990 len = strlen(value);
1991 if (len > 0 && isspace(value[len-1])) {
1992 const char *key_value;
1995 key_value = &rules->buf[cur->key.value_off];
1996 klen = strlen(key_value);
1997 if (klen > 0 && !isspace(key_value[klen-1])) {
1998 if (value != vbuf) {
1999 util_strscpy(vbuf, sizeof(vbuf), value);
2002 while (len > 0 && isspace(vbuf[--len]))
2007 return match_key(rules, cur, value);
2016 int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event, const sigset_t *sigmask)
2020 enum escape_type esc = ESCAPE_UNSET;
2023 if (rules->tokens == NULL)
2026 can_set_name = ((strcmp(udev_device_get_action(event->dev), "remove") != 0) &&
2027 (major(udev_device_get_devnum(event->dev)) > 0 ||
2028 udev_device_get_ifindex(event->dev) > 0));
2030 /* loop through token list, match, run actions or forward to next rule */
2031 cur = &rules->tokens[0];
2034 dump_token(rules, cur);
2035 switch (cur->type) {
2039 /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
2040 if (!can_set_name && rule->rule.can_set_name)
2045 if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
2049 if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
2053 if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
2056 case TK_M_DEVLINK: {
2057 size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
2058 struct udev_list_entry *list_entry;
2061 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
2062 const char *devlink;
2064 devlink = &udev_list_entry_get_name(list_entry)[devlen];
2065 if (match_key(rules, cur, devlink) == 0) {
2075 if (match_key(rules, cur, event->name) != 0)
2079 const char *key_name = &rules->buf[cur->key.attr_off];
2082 value = udev_device_get_property_value(event->dev, key_name);
2085 if (match_key(rules, cur, value))
2090 struct udev_list_entry *list_entry;
2093 udev_list_entry_foreach(list_entry, udev_device_get_tags_list_entry(event->dev)) {
2094 if (strcmp(&rules->buf[cur->key.value_off], udev_list_entry_get_name(list_entry)) == 0) {
2099 if (!match && (cur->key.op != OP_NOMATCH))
2103 case TK_M_SUBSYSTEM:
2104 if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
2108 if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
2111 case TK_M_WAITFOR: {
2112 char filename[UTIL_PATH_SIZE];
2115 udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename));
2116 found = (wait_for_file(event->dev, filename, 10) == 0);
2117 if (!found && (cur->key.op != OP_NOMATCH))
2122 if (match_attr(rules, event->dev, event, cur) != 0)
2126 case TK_M_SUBSYSTEMS:
2132 /* get whole sequence of parent matches */
2134 while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX)
2137 /* loop over parents */
2138 event->dev_parent = event->dev;
2142 /* loop over sequence of parent match keys */
2143 for (key = cur; key < next; key++ ) {
2144 dump_token(rules, key);
2147 if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
2150 case TK_M_SUBSYSTEMS:
2151 if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
2155 if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
2159 if (match_attr(rules, event->dev_parent, event, key) != 0)
2163 bool match = udev_device_has_tag(event->dev_parent, &rules->buf[cur->key.value_off]);
2165 if (match && key->key.op == OP_NOMATCH)
2167 if (!match && key->key.op == OP_MATCH)
2178 event->dev_parent = udev_device_get_parent(event->dev_parent);
2179 if (event->dev_parent == NULL)
2182 /* move behind our sequence of parent match keys */
2187 char filename[UTIL_PATH_SIZE];
2188 struct stat statbuf;
2191 udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename));
2192 if (util_resolve_subsys_kernel(event->udev, filename, filename, sizeof(filename), 0) != 0) {
2193 if (filename[0] != '/') {
2194 char tmp[UTIL_PATH_SIZE];
2196 util_strscpy(tmp, sizeof(tmp), filename);
2197 util_strscpyl(filename, sizeof(filename),
2198 udev_device_get_syspath(event->dev), "/", tmp, NULL);
2201 attr_subst_subdir(filename, sizeof(filename));
2203 match = (stat(filename, &statbuf) == 0);
2204 if (match && cur->key.mode > 0)
2205 match = ((statbuf.st_mode & cur->key.mode) > 0);
2206 if (match && cur->key.op == OP_NOMATCH)
2208 if (!match && cur->key.op == OP_MATCH)
2212 case TK_M_EVENT_TIMEOUT:
2213 log_debug("OPTIONS event_timeout=%u\n", cur->key.event_timeout);
2214 event->timeout_usec = cur->key.event_timeout * 1000 * 1000;
2216 case TK_M_PROGRAM: {
2217 char program[UTIL_PATH_SIZE];
2219 char result[UTIL_PATH_SIZE];
2221 free(event->program_result);
2222 event->program_result = NULL;
2223 udev_event_apply_format(event, &rules->buf[cur->key.value_off], program, sizeof(program));
2224 envp = udev_device_get_properties_envp(event->dev);
2225 log_debug("PROGRAM '%s' %s:%u\n",
2227 &rules->buf[rule->rule.filename_off],
2228 rule->rule.filename_line);
2230 if (udev_event_spawn(event, program, envp, sigmask, result, sizeof(result)) < 0) {
2231 if (cur->key.op != OP_NOMATCH)
2236 util_remove_trailing_chars(result, '\n');
2237 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2238 count = util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
2240 log_debug("%i character(s) replaced\n" , count);
2242 event->program_result = strdup(result);
2243 if (cur->key.op == OP_NOMATCH)
2248 case TK_M_IMPORT_FILE: {
2249 char import[UTIL_PATH_SIZE];
2251 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2252 if (import_file_into_properties(event->dev, import) != 0)
2253 if (cur->key.op != OP_NOMATCH)
2257 case TK_M_IMPORT_PROG: {
2258 char import[UTIL_PATH_SIZE];
2260 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2261 log_debug("IMPORT '%s' %s:%u\n",
2263 &rules->buf[rule->rule.filename_off],
2264 rule->rule.filename_line);
2266 if (import_program_into_properties(event, import, sigmask) != 0)
2267 if (cur->key.op != OP_NOMATCH)
2271 case TK_M_IMPORT_BUILTIN: {
2272 char command[UTIL_PATH_SIZE];
2274 if (udev_builtin_run_once(cur->key.builtin_cmd)) {
2275 /* check if we ran already */
2276 if (event->builtin_run & (1 << cur->key.builtin_cmd)) {
2277 log_debug("IMPORT builtin skip '%s' %s:%u\n",
2278 udev_builtin_name(cur->key.builtin_cmd),
2279 &rules->buf[rule->rule.filename_off],
2280 rule->rule.filename_line);
2281 /* return the result from earlier run */
2282 if (event->builtin_ret & (1 << cur->key.builtin_cmd))
2283 if (cur->key.op != OP_NOMATCH)
2288 event->builtin_run |= (1 << cur->key.builtin_cmd);
2291 udev_event_apply_format(event, &rules->buf[cur->key.value_off], command, sizeof(command));
2292 log_debug("IMPORT builtin '%s' %s:%u\n",
2293 udev_builtin_name(cur->key.builtin_cmd),
2294 &rules->buf[rule->rule.filename_off],
2295 rule->rule.filename_line);
2297 if (udev_builtin_run(event->dev, cur->key.builtin_cmd, command, false) != 0) {
2298 /* remember failure */
2299 log_debug("IMPORT builtin '%s' returned non-zero\n",
2300 udev_builtin_name(cur->key.builtin_cmd));
2301 event->builtin_ret |= (1 << cur->key.builtin_cmd);
2302 if (cur->key.op != OP_NOMATCH)
2307 case TK_M_IMPORT_DB: {
2308 const char *key = &rules->buf[cur->key.value_off];
2311 value = udev_device_get_property_value(event->dev_db, key);
2312 if (value != NULL) {
2313 struct udev_list_entry *entry;
2315 entry = udev_device_add_property(event->dev, key, value);
2316 udev_list_entry_set_num(entry, true);
2318 if (cur->key.op != OP_NOMATCH)
2323 case TK_M_IMPORT_CMDLINE: {
2325 bool imported = false;
2327 f = fopen("/proc/cmdline", "r");
2331 if (fgets(cmdline, sizeof(cmdline), f) != NULL) {
2332 const char *key = &rules->buf[cur->key.value_off];
2335 pos = strstr(cmdline, key);
2337 struct udev_list_entry *entry;
2340 if (pos[0] == '\0' || isspace(pos[0])) {
2341 /* we import simple flags as 'FLAG=1' */
2342 entry = udev_device_add_property(event->dev, key, "1");
2343 udev_list_entry_set_num(entry, true);
2345 } else if (pos[0] == '=') {
2350 while (pos[0] != '\0' && !isspace(pos[0]))
2353 entry = udev_device_add_property(event->dev, key, value);
2354 udev_list_entry_set_num(entry, true);
2361 if (!imported && cur->key.op != OP_NOMATCH)
2365 case TK_M_IMPORT_PARENT: {
2366 char import[UTIL_PATH_SIZE];
2368 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2369 if (import_parent_into_properties(event->dev, import) != 0)
2370 if (cur->key.op != OP_NOMATCH)
2375 if (match_key(rules, cur, event->program_result) != 0)
2378 case TK_A_STRING_ESCAPE_NONE:
2381 case TK_A_STRING_ESCAPE_REPLACE:
2382 esc = ESCAPE_REPLACE;
2384 case TK_A_DB_PERSIST:
2385 udev_device_set_db_persist(event->dev);
2387 case TK_A_INOTIFY_WATCH:
2388 if (event->inotify_watch_final)
2390 if (cur->key.op == OP_ASSIGN_FINAL)
2391 event->inotify_watch_final = true;
2392 event->inotify_watch = cur->key.watch;
2394 case TK_A_DEVLINK_PRIO:
2395 udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
2398 char owner[UTIL_NAME_SIZE];
2400 if (event->owner_final)
2402 if (cur->key.op == OP_ASSIGN_FINAL)
2403 event->owner_final = true;
2404 udev_event_apply_format(event, &rules->buf[cur->key.value_off], owner, sizeof(owner));
2405 event->uid = util_lookup_user(event->udev, owner);
2406 log_debug("OWNER %u %s:%u\n",
2408 &rules->buf[rule->rule.filename_off],
2409 rule->rule.filename_line);
2413 char group[UTIL_NAME_SIZE];
2415 if (event->group_final)
2417 if (cur->key.op == OP_ASSIGN_FINAL)
2418 event->group_final = true;
2419 udev_event_apply_format(event, &rules->buf[cur->key.value_off], group, sizeof(group));
2420 event->gid = util_lookup_group(event->udev, group);
2421 log_debug("GROUP %u %s:%u\n",
2423 &rules->buf[rule->rule.filename_off],
2424 rule->rule.filename_line);
2428 char mode_str[UTIL_NAME_SIZE];
2432 if (event->mode_final)
2434 udev_event_apply_format(event, &rules->buf[cur->key.value_off], mode_str, sizeof(mode_str));
2435 mode = strtol(mode_str, &endptr, 8);
2436 if (endptr[0] != '\0') {
2437 log_error("ignoring invalid mode '%s'\n", mode_str);
2440 if (cur->key.op == OP_ASSIGN_FINAL)
2441 event->mode_final = true;
2442 event->mode_set = true;
2444 log_debug("MODE %#o %s:%u\n",
2446 &rules->buf[rule->rule.filename_off],
2447 rule->rule.filename_line);
2451 if (event->owner_final)
2453 if (cur->key.op == OP_ASSIGN_FINAL)
2454 event->owner_final = true;
2455 event->uid = cur->key.uid;
2456 log_debug("OWNER %u %s:%u\n",
2458 &rules->buf[rule->rule.filename_off],
2459 rule->rule.filename_line);
2462 if (event->group_final)
2464 if (cur->key.op == OP_ASSIGN_FINAL)
2465 event->group_final = true;
2466 event->gid = cur->key.gid;
2467 log_debug("GROUP %u %s:%u\n",
2469 &rules->buf[rule->rule.filename_off],
2470 rule->rule.filename_line);
2473 if (event->mode_final)
2475 if (cur->key.op == OP_ASSIGN_FINAL)
2476 event->mode_final = true;
2477 event->mode_set = true;
2478 event->mode = cur->key.mode;
2479 log_debug("MODE %#o %s:%u\n",
2481 &rules->buf[rule->rule.filename_off],
2482 rule->rule.filename_line);
2485 const char *name = &rules->buf[cur->key.attr_off];
2486 char *value = &rules->buf[cur->key.value_off];
2488 if (value[0] != '\0') {
2489 char temp_value[UTIL_NAME_SIZE];
2490 struct udev_list_entry *entry;
2492 udev_event_apply_format(event, value, temp_value, sizeof(temp_value));
2493 entry = udev_device_add_property(event->dev, name, temp_value);
2494 /* store in db, skip private keys */
2496 udev_list_entry_set_num(entry, true);
2498 udev_device_add_property(event->dev, name, NULL);
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 size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
2540 if (strcmp(name_str, &udev_device_get_devnode(event->dev)[devlen]) != 0) {
2541 log_error("NAME=\"%s\" ignored, kernel device nodes "
2542 "can not be renamed; please fix it in %s:%u\n", name,
2543 &rules->buf[rule->rule.filename_off], rule->rule.filename_line);
2548 event->name = strdup(name_str);
2549 log_debug("NAME '%s' %s:%u\n",
2551 &rules->buf[rule->rule.filename_off],
2552 rule->rule.filename_line);
2555 case TK_A_DEVLINK: {
2556 char temp[UTIL_PATH_SIZE];
2557 char filename[UTIL_PATH_SIZE];
2561 if (event->devlink_final)
2563 if (major(udev_device_get_devnum(event->dev)) == 0)
2565 if (cur->key.op == OP_ASSIGN_FINAL)
2566 event->devlink_final = true;
2567 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2568 udev_device_cleanup_devlinks_list(event->dev);
2570 /* allow multiple symlinks separated by spaces */
2571 udev_event_apply_format(event, &rules->buf[cur->key.value_off], temp, sizeof(temp));
2572 if (esc == ESCAPE_UNSET)
2573 count = util_replace_chars(temp, "/ ");
2574 else if (esc == ESCAPE_REPLACE)
2575 count = util_replace_chars(temp, "/");
2577 log_debug("%i character(s) replaced\n" , count);
2579 while (isspace(pos[0]))
2581 next = strchr(pos, ' ');
2582 while (next != NULL) {
2584 log_debug("LINK '%s' %s:%u\n", pos,
2585 &rules->buf[rule->rule.filename_off], rule->rule.filename_line);
2586 util_strscpyl(filename, sizeof(filename), udev_get_dev_path(event->udev), "/", pos, NULL);
2587 udev_device_add_devlink(event->dev, filename, cur->key.devlink_unique);
2588 while (isspace(next[1]))
2591 next = strchr(pos, ' ');
2593 if (pos[0] != '\0') {
2594 log_debug("LINK '%s' %s:%u\n", pos,
2595 &rules->buf[rule->rule.filename_off], rule->rule.filename_line);
2596 util_strscpyl(filename, sizeof(filename), udev_get_dev_path(event->udev), "/", pos, NULL);
2597 udev_device_add_devlink(event->dev, filename, cur->key.devlink_unique);
2602 const char *key_name = &rules->buf[cur->key.attr_off];
2603 char attr[UTIL_PATH_SIZE];
2604 char value[UTIL_NAME_SIZE];
2607 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0)
2608 util_strscpyl(attr, sizeof(attr), udev_device_get_syspath(event->dev), "/", key_name, NULL);
2609 attr_subst_subdir(attr, sizeof(attr));
2611 udev_event_apply_format(event, &rules->buf[cur->key.value_off], value, sizeof(value));
2612 log_debug("ATTR '%s' writing '%s' %s:%u\n", attr, value,
2613 &rules->buf[rule->rule.filename_off],
2614 rule->rule.filename_line);
2615 f = fopen(attr, "w");
2617 if (fprintf(f, "%s", value) <= 0)
2618 log_error("error writing ATTR{%s}: %m\n", attr);
2621 log_error("error opening ATTR{%s} for writing: %m\n", attr);
2625 case TK_A_RUN_BUILTIN:
2626 case TK_A_RUN_PROGRAM: {
2627 struct udev_list_entry *entry;
2629 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2630 udev_list_cleanup(&event->run_list);
2631 log_debug("RUN '%s' %s:%u\n",
2632 &rules->buf[cur->key.value_off],
2633 &rules->buf[rule->rule.filename_off],
2634 rule->rule.filename_line);
2635 entry = udev_list_entry_add(&event->run_list, &rules->buf[cur->key.value_off], NULL);
2636 udev_list_entry_set_num(entry, cur->key.builtin_cmd);
2640 if (cur->key.rule_goto == 0)
2642 cur = &rules->tokens[cur->key.rule_goto];
2647 case TK_M_PARENTS_MIN:
2648 case TK_M_PARENTS_MAX:
2651 log_error("wrong type %u\n", cur->type);
2658 /* fast-forward to next rule */
2659 cur = rule + rule->rule.token_count;
2663 void udev_rules_apply_static_dev_perms(struct udev_rules *rules)
2671 if (rules->tokens == NULL)
2674 cur = &rules->tokens[0];
2677 switch (cur->type) {
2682 /* skip rules without a static_node tag */
2683 if (!rule->rule.has_static_node)
2697 mode = cur->key.mode;
2699 case TK_A_STATIC_NODE: {
2700 char filename[UTIL_PATH_SIZE];
2703 /* we assure, that the permissions tokens are sorted before the static token */
2704 if (mode == 0 && uid == 0 && gid == 0)
2706 util_strscpyl(filename, sizeof(filename), udev_get_dev_path(rules->udev), "/",
2707 &rules->buf[cur->key.value_off], NULL);
2708 if (stat(filename, &stats) != 0)
2710 if (!S_ISBLK(stats.st_mode) && !S_ISCHR(stats.st_mode))
2718 if (mode != (stats.st_mode & 01777)) {
2719 chmod(filename, mode);
2720 log_debug("chmod '%s' %#o\n", filename, mode);
2723 if ((uid != 0 && uid != stats.st_uid) || (gid != 0 && gid != stats.st_gid)) {
2724 chown(filename, uid, gid);
2725 log_debug("chown '%s' %u %u\n", filename, uid, gid);
2728 utimensat(AT_FDCWD, filename, NULL, 0);
2738 /* fast-forward to next rule */
2739 cur = rule + rule->rule.token_count;