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, /* val, bool */
172 TK_A_GOTO, /* size_t */
177 /* we try to pack stuff in a way that we take only 12 bytes per token */
180 unsigned char type; /* same in rule and key */
182 enum token_type type:8;
184 bool has_static_node:1;
185 unsigned int unused:6;
186 unsigned short token_count;
187 unsigned int label_off;
188 unsigned short filename_off;
189 unsigned short filename_line;
192 enum token_type type:8;
193 enum operation_type op:8;
194 enum string_glob_type glob:8;
195 enum string_subst_type subst:4;
196 enum string_subst_type attrsubst:4;
197 unsigned int value_off;
199 unsigned int attr_off;
201 unsigned int rule_goto;
208 enum udev_builtin_cmd builtin_cmd;
216 struct udev_rules *rules;
218 struct token token[MAX_TK];
219 unsigned int token_cur;
223 static const char *operation_str(enum operation_type type)
225 static const char *operation_strs[] = {
226 [OP_UNSET] = "UNSET",
227 [OP_MATCH] = "match",
228 [OP_NOMATCH] = "nomatch",
229 [OP_MATCH_MAX] = "MATCH_MAX",
232 [OP_ASSIGN] = "assign",
233 [OP_ASSIGN_FINAL] = "assign-final",
236 return operation_strs[type];
239 static const char *string_glob_str(enum string_glob_type type)
241 static const char *string_glob_strs[] = {
242 [GL_UNSET] = "UNSET",
243 [GL_PLAIN] = "plain",
245 [GL_SPLIT] = "split",
246 [GL_SPLIT_GLOB] = "split-glob",
247 [GL_SOMETHING] = "split-glob",
250 return string_glob_strs[type];
253 static const char *token_str(enum token_type type)
255 static const char *token_strs[] = {
256 [TK_UNSET] = "UNSET",
259 [TK_M_ACTION] = "M ACTION",
260 [TK_M_DEVPATH] = "M DEVPATH",
261 [TK_M_KERNEL] = "M KERNEL",
262 [TK_M_DEVLINK] = "M DEVLINK",
263 [TK_M_NAME] = "M NAME",
264 [TK_M_ENV] = "M ENV",
265 [TK_M_TAG] = "M TAG",
266 [TK_M_SUBSYSTEM] = "M SUBSYSTEM",
267 [TK_M_DRIVER] = "M DRIVER",
268 [TK_M_WAITFOR] = "M WAITFOR",
269 [TK_M_ATTR] = "M ATTR",
271 [TK_M_PARENTS_MIN] = "M PARENTS_MIN",
272 [TK_M_KERNELS] = "M KERNELS",
273 [TK_M_SUBSYSTEMS] = "M SUBSYSTEMS",
274 [TK_M_DRIVERS] = "M DRIVERS",
275 [TK_M_ATTRS] = "M ATTRS",
276 [TK_M_TAGS] = "M TAGS",
277 [TK_M_PARENTS_MAX] = "M PARENTS_MAX",
279 [TK_M_TEST] = "M TEST",
280 [TK_M_EVENT_TIMEOUT] = "M EVENT_TIMEOUT",
281 [TK_M_PROGRAM] = "M PROGRAM",
282 [TK_M_IMPORT_FILE] = "M IMPORT_FILE",
283 [TK_M_IMPORT_PROG] = "M IMPORT_PROG",
284 [TK_M_IMPORT_BUILTIN] = "M IMPORT_BUILTIN",
285 [TK_M_IMPORT_DB] = "M IMPORT_DB",
286 [TK_M_IMPORT_CMDLINE] = "M IMPORT_CMDLINE",
287 [TK_M_IMPORT_PARENT] = "M IMPORT_PARENT",
288 [TK_M_RESULT] = "M RESULT",
289 [TK_M_MAX] = "M MAX",
291 [TK_A_STRING_ESCAPE_NONE] = "A STRING_ESCAPE_NONE",
292 [TK_A_STRING_ESCAPE_REPLACE] = "A STRING_ESCAPE_REPLACE",
293 [TK_A_DB_PERSIST] = "A DB_PERSIST",
294 [TK_A_INOTIFY_WATCH] = "A INOTIFY_WATCH",
295 [TK_A_DEVLINK_PRIO] = "A DEVLINK_PRIO",
296 [TK_A_OWNER] = "A OWNER",
297 [TK_A_GROUP] = "A GROUP",
298 [TK_A_MODE] = "A MODE",
299 [TK_A_OWNER_ID] = "A OWNER_ID",
300 [TK_A_GROUP_ID] = "A GROUP_ID",
301 [TK_A_STATIC_NODE] = "A STATIC_NODE",
302 [TK_A_MODE_ID] = "A MODE_ID",
303 [TK_A_ENV] = "A ENV",
304 [TK_A_TAG] = "A ENV",
305 [TK_A_NAME] = "A NAME",
306 [TK_A_DEVLINK] = "A DEVLINK",
307 [TK_A_ATTR] = "A ATTR",
308 [TK_A_RUN] = "A RUN",
309 [TK_A_GOTO] = "A GOTO",
314 return token_strs[type];
317 static void dump_token(struct udev_rules *rules, struct token *token)
319 enum token_type type = token->type;
320 enum operation_type op = token->key.op;
321 enum string_glob_type glob = token->key.glob;
322 const char *value = &rules->buf[token->key.value_off];
323 const char *attr = &rules->buf[token->key.attr_off];
328 const char *tks_ptr = (char *)rules->tokens;
329 const char *tk_ptr = (char *)token;
330 unsigned int idx = (tk_ptr - tks_ptr) / sizeof(struct token);
332 dbg(rules->udev, "* RULE %s:%u, token: %u, count: %u, label: '%s'\n",
333 &rules->buf[token->rule.filename_off], token->rule.filename_line,
334 idx, token->rule.token_count,
335 &rules->buf[token->rule.label_off]);
347 case TK_M_SUBSYSTEMS:
351 case TK_M_IMPORT_FILE:
352 case TK_M_IMPORT_PROG:
354 case TK_M_IMPORT_CMDLINE:
355 case TK_M_IMPORT_PARENT:
363 dbg(rules->udev, "%s %s '%s'(%s)\n",
364 token_str(type), operation_str(op), value, string_glob_str(glob));
366 case TK_M_IMPORT_BUILTIN:
367 dbg(rules->udev, "%s %i\n", token_str(type), token->key.builtin_cmd);
374 dbg(rules->udev, "%s %s '%s' '%s'(%s)\n",
375 token_str(type), operation_str(op), attr, value, string_glob_str(glob));
379 dbg(rules->udev, "%s %s '%s'\n", token_str(type), operation_str(op), value);
381 case TK_A_STRING_ESCAPE_NONE:
382 case TK_A_STRING_ESCAPE_REPLACE:
383 case TK_A_DB_PERSIST:
384 dbg(rules->udev, "%s\n", token_str(type));
387 dbg(rules->udev, "%s %s '%s'(%s) %#o\n",
388 token_str(type), operation_str(op), value, string_glob_str(glob), token->key.mode);
390 case TK_A_INOTIFY_WATCH:
391 dbg(rules->udev, "%s %u\n", token_str(type), token->key.watch);
393 case TK_A_DEVLINK_PRIO:
394 dbg(rules->udev, "%s %u\n", token_str(type), token->key.devlink_prio);
397 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.uid);
400 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.gid);
403 dbg(rules->udev, "%s %s %#o\n", token_str(type), operation_str(op), token->key.mode);
405 case TK_A_STATIC_NODE:
406 dbg(rules->udev, "%s '%s'\n", token_str(type), value);
408 case TK_M_EVENT_TIMEOUT:
409 dbg(rules->udev, "%s %u\n", token_str(type), token->key.event_timeout);
412 dbg(rules->udev, "%s '%s' %u\n", token_str(type), value, token->key.rule_goto);
415 dbg(rules->udev, "* %s\n", token_str(type));
417 case TK_M_PARENTS_MIN:
418 case TK_M_PARENTS_MAX:
421 dbg(rules->udev, "unknown type %u\n", type);
426 static void dump_rules(struct udev_rules *rules)
430 dbg(rules->udev, "dumping %u (%zu bytes) tokens, %u (%zu bytes) strings\n",
432 rules->token_cur * sizeof(struct token),
435 for(i = 0; i < rules->token_cur; i++)
436 dump_token(rules, &rules->tokens[i]);
439 static inline const char *operation_str(enum operation_type type) { return NULL; }
440 static inline const char *token_str(enum token_type type) { return NULL; }
441 static inline void dump_token(struct udev_rules *rules, struct token *token) {}
442 static inline void dump_rules(struct udev_rules *rules) {}
443 #endif /* ENABLE_DEBUG */
445 static int add_new_string(struct udev_rules *rules, const char *str, size_t bytes)
449 /* grow buffer if needed */
450 if (rules->buf_cur + bytes+1 >= rules->buf_max) {
454 /* double the buffer size */
455 add = rules->buf_max;
459 buf = realloc(rules->buf, rules->buf_max + add);
462 dbg(rules->udev, "extend buffer from %zu to %zu\n", rules->buf_max, rules->buf_max + add);
464 rules->buf_max += add;
466 off = rules->buf_cur;
467 memcpy(&rules->buf[rules->buf_cur], str, bytes);
468 rules->buf_cur += bytes;
473 static int add_string(struct udev_rules *rules, const char *str)
475 unsigned int node_idx;
476 struct trie_node *new_node;
477 unsigned int new_node_idx;
482 struct trie_node *parent;
484 /* walk trie, start from last character of str to find matching tails */
488 for (depth = 0; depth <= len; depth++) {
489 struct trie_node *node;
490 unsigned int child_idx;
492 node = &rules->trie_nodes[node_idx];
493 off = node->value_off + node->value_len - len;
495 /* match against current node */
496 if (depth == len || (node->value_len >= len && memcmp(&rules->buf[off], str, len) == 0))
499 /* lookup child node */
500 key = str[len - 1 - depth];
501 child_idx = node->child_idx;
502 while (child_idx > 0) {
503 struct trie_node *child;
505 child = &rules->trie_nodes[child_idx];
506 if (child->key == key)
508 child_idx = child->next_child_idx;
512 node_idx = child_idx;
515 /* string not found, add it */
516 off = add_new_string(rules, str, len + 1);
518 /* grow trie nodes if needed */
519 if (rules->trie_nodes_cur >= rules->trie_nodes_max) {
520 struct trie_node *nodes;
523 /* double the buffer size */
524 add = rules->trie_nodes_max;
528 nodes = realloc(rules->trie_nodes, (rules->trie_nodes_max + add) * sizeof(struct trie_node));
531 dbg(rules->udev, "extend trie nodes from %u to %u\n",
532 rules->trie_nodes_max, rules->trie_nodes_max + add);
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 dbg(rules->udev, "extend tokens from %u to %u\n", rules->token_max, rules->token_max + add);
576 rules->tokens = tokens;
577 rules->token_max += add;
579 memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
584 static uid_t add_uid(struct udev_rules *rules, const char *owner)
590 /* lookup, if we know it already */
591 for (i = 0; i < rules->uids_cur; i++) {
592 off = rules->uids[i].name_off;
593 if (strcmp(&rules->buf[off], owner) == 0) {
594 uid = rules->uids[i].uid;
595 dbg(rules->udev, "return existing %u for '%s'\n", uid, owner);
599 uid = util_lookup_user(rules->udev, owner);
601 /* grow buffer if needed */
602 if (rules->uids_cur+1 >= rules->uids_max) {
603 struct uid_gid *uids;
606 /* double the buffer size */
607 add = rules->uids_max;
611 uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
614 dbg(rules->udev, "extend uids from %u to %u\n", rules->uids_max, rules->uids_max + add);
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 (strcmp(&rules->buf[off], group) == 0) {
637 gid = rules->gids[i].gid;
638 dbg(rules->udev, "return existing %u for '%s'\n", gid, group);
642 gid = util_lookup_group(rules->udev, group);
644 /* grow buffer if needed */
645 if (rules->gids_cur+1 >= rules->gids_max) {
646 struct uid_gid *gids;
649 /* double the buffer size */
650 add = rules->gids_max;
654 gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid));
657 dbg(rules->udev, "extend gids from %u to %u\n", rules->gids_max, rules->gids_max + add);
659 rules->gids_max += add;
661 rules->gids[rules->gids_cur].gid = gid;
662 off = add_string(rules, group);
665 rules->gids[rules->gids_cur].name_off = off;
670 static int import_property_from_string(struct udev_device *dev, char *line)
672 struct udev *udev = udev_device_get_udev(dev);
679 while (isspace(key[0]))
682 /* comment or empty line */
683 if (key[0] == '#' || key[0] == '\0')
686 /* split key/value */
687 val = strchr(key, '=');
694 while (isspace(val[0]))
701 while (isspace(key[len-1]))
705 /* terminate value */
709 while (isspace(val[len-1]))
717 if (val[0] == '"' || val[0] == '\'') {
718 if (val[len-1] != val[0]) {
719 info(udev, "inconsistent quoting: '%s', skip\n", line);
726 dbg(udev, "adding '%s'='%s'\n", key, val);
728 /* handle device, renamed by external tool, returning new path */
729 if (strcmp(key, "DEVPATH") == 0) {
730 char syspath[UTIL_PATH_SIZE];
732 info(udev, "updating devpath from '%s' to '%s'\n",
733 udev_device_get_devpath(dev), val);
734 util_strscpyl(syspath, sizeof(syspath), udev_get_sys_path(udev), val, NULL);
735 udev_device_set_syspath(dev, syspath);
737 struct udev_list_entry *entry;
739 entry = udev_device_add_property(dev, key, val);
740 /* store in db, skip private keys */
742 udev_list_entry_set_num(entry, true);
747 static int import_file_into_properties(struct udev_device *dev, const char *filename)
750 char line[UTIL_LINE_SIZE];
752 f = fopen(filename, "r");
755 while (fgets(line, sizeof(line), f) != NULL)
756 import_property_from_string(dev, line);
761 static int import_program_into_properties(struct udev_event *event, const char *program, const sigset_t *sigmask)
763 struct udev_device *dev = event->dev;
765 char result[UTIL_LINE_SIZE];
769 envp = udev_device_get_properties_envp(dev);
770 err = udev_event_spawn(event, program, envp, sigmask, result, sizeof(result));
775 while (line != NULL) {
778 pos = strchr(line, '\n');
783 import_property_from_string(dev, line);
789 static int import_parent_into_properties(struct udev_device *dev, const char *filter)
791 struct udev *udev = udev_device_get_udev(dev);
792 struct udev_device *dev_parent;
793 struct udev_list_entry *list_entry;
795 dev_parent = udev_device_get_parent(dev);
796 if (dev_parent == NULL)
799 dbg(udev, "found parent '%s', get the node name\n", udev_device_get_syspath(dev_parent));
800 udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
801 const char *key = udev_list_entry_get_name(list_entry);
802 const char *val = udev_list_entry_get_value(list_entry);
804 if (fnmatch(filter, key, 0) == 0) {
805 struct udev_list_entry *entry;
807 dbg(udev, "import key '%s=%s'\n", key, val);
808 entry = udev_device_add_property(dev, key, val);
809 /* store in db, skip private keys */
811 udev_list_entry_set_num(entry, true);
817 #define WAIT_LOOP_PER_SECOND 50
818 static int wait_for_file(struct udev_device *dev, const char *file, int timeout)
820 struct udev *udev = udev_device_get_udev(dev);
821 char filepath[UTIL_PATH_SIZE];
822 char devicepath[UTIL_PATH_SIZE];
824 int loop = timeout * WAIT_LOOP_PER_SECOND;
826 /* a relative path is a device attribute */
827 devicepath[0] = '\0';
828 if (file[0] != '/') {
829 util_strscpyl(devicepath, sizeof(devicepath),
830 udev_get_sys_path(udev), udev_device_get_devpath(dev), NULL);
831 util_strscpyl(filepath, sizeof(filepath), devicepath, "/", file, NULL);
835 dbg(udev, "will wait %i sec for '%s'\n", timeout, file);
837 const struct timespec duration = { 0, 1000 * 1000 * 1000 / WAIT_LOOP_PER_SECOND };
840 if (stat(file, &stats) == 0) {
841 info(udev, "file '%s' appeared after %i loops\n", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
844 /* make sure, the device did not disappear in the meantime */
845 if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
846 info(udev, "device disappeared while waiting for '%s'\n", file);
849 info(udev, "wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND);
850 nanosleep(&duration, NULL);
852 info(udev, "waiting for '%s' failed\n", file);
856 static int attr_subst_subdir(char *attr, size_t len)
860 if (strstr(attr, "/*/")) {
862 char dirname[UTIL_PATH_SIZE];
866 util_strscpy(dirname, sizeof(dirname), attr);
867 pos = strstr(dirname, "/*/");
872 dir = opendir(dirname);
876 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
879 if (dent->d_name[0] == '.')
881 util_strscpyl(attr, len, dirname, "/", dent->d_name, tail, NULL);
882 if (stat(attr, &stats) == 0) {
894 static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value)
900 if (linepos == NULL || linepos[0] == '\0')
903 /* skip whitespace */
904 while (isspace(linepos[0]) || linepos[0] == ',')
908 if (linepos[0] == '\0')
914 if (linepos[0] == '\0')
916 if (isspace(linepos[0]))
918 if (linepos[0] == '=')
920 if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
921 if (linepos[1] == '=')
925 /* remember end of key */
928 /* skip whitespace after key */
929 while (isspace(linepos[0]))
931 if (linepos[0] == '\0')
934 /* get operation type */
935 if (linepos[0] == '=' && linepos[1] == '=') {
938 } else if (linepos[0] == '!' && linepos[1] == '=') {
941 } else if (linepos[0] == '+' && linepos[1] == '=') {
944 } else if (linepos[0] == '=') {
947 } else if (linepos[0] == ':' && linepos[1] == '=') {
948 *op = OP_ASSIGN_FINAL;
956 /* skip whitespace after operator */
957 while (isspace(linepos[0]))
959 if (linepos[0] == '\0')
963 if (linepos[0] == '"')
970 temp = strchr(linepos, '"');
975 dbg(udev, "%s '%s'-'%s'\n", operation_str(*op), *key, *value);
977 /* move line to next key */
982 /* extract possible KEY{attr} */
983 static char *get_key_attribute(struct udev *udev, char *str)
988 attr = strchr(str, '{');
991 pos = strchr(attr, '}');
993 err(udev, "missing closing brace for format\n");
997 dbg(udev, "attribute='%s'\n", attr);
1003 static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
1004 enum operation_type op,
1005 const char *value, const void *data)
1007 struct token *token = &rule_tmp->token[rule_tmp->token_cur];
1008 const char *attr = NULL;
1010 memset(token, 0x00, sizeof(struct token));
1016 case TK_M_SUBSYSTEM:
1022 case TK_M_SUBSYSTEMS:
1026 case TK_M_IMPORT_FILE:
1027 case TK_M_IMPORT_PROG:
1028 case TK_M_IMPORT_DB:
1029 case TK_M_IMPORT_CMDLINE:
1030 case TK_M_IMPORT_PARENT:
1039 token->key.value_off = add_string(rule_tmp->rules, value);
1041 case TK_M_IMPORT_BUILTIN:
1042 token->key.builtin_cmd = *(enum udev_builtin_cmd *)data;
1050 token->key.value_off = add_string(rule_tmp->rules, value);
1051 token->key.attr_off = add_string(rule_tmp->rules, attr);
1054 token->key.value_off = add_string(rule_tmp->rules, value);
1055 token->key.devlink_unique = *(int *)data;
1058 token->key.value_off = add_string(rule_tmp->rules, value);
1060 token->key.mode = *(mode_t *)data;
1062 case TK_A_STRING_ESCAPE_NONE:
1063 case TK_A_STRING_ESCAPE_REPLACE:
1064 case TK_A_DB_PERSIST:
1067 token->key.value_off = add_string(rule_tmp->rules, value);
1069 case TK_A_INOTIFY_WATCH:
1070 case TK_A_DEVLINK_PRIO:
1071 token->key.devlink_prio = *(int *)data;
1074 token->key.uid = *(uid_t *)data;
1077 token->key.gid = *(gid_t *)data;
1080 token->key.mode = *(mode_t *)data;
1082 case TK_A_STATIC_NODE:
1083 token->key.value_off = add_string(rule_tmp->rules, value);
1085 case TK_M_EVENT_TIMEOUT:
1086 token->key.event_timeout = *(int *)data;
1089 case TK_M_PARENTS_MIN:
1090 case TK_M_PARENTS_MAX:
1094 err(rule_tmp->rules->udev, "wrong type %u\n", type);
1098 if (value != NULL && type < TK_M_MAX) {
1099 /* check if we need to split or call fnmatch() while matching rules */
1100 enum string_glob_type glob;
1104 has_split = (strchr(value, '|') != NULL);
1105 has_glob = (strchr(value, '*') != NULL || strchr(value, '?') != NULL || strchr(value, '[') != NULL);
1106 if (has_split && has_glob) {
1107 glob = GL_SPLIT_GLOB;
1108 } else if (has_split) {
1110 } else if (has_glob) {
1111 if (strcmp(value, "?*") == 0)
1112 glob = GL_SOMETHING;
1118 token->key.glob = glob;
1121 if (value != NULL && type > TK_M_MAX) {
1122 /* check if assigned value has substitution chars */
1123 if (value[0] == '[')
1124 token->key.subst = SB_SUBSYS;
1125 else if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
1126 token->key.subst = SB_FORMAT;
1128 token->key.subst = SB_NONE;
1132 /* check if property/attribut name has substitution chars */
1134 token->key.attrsubst = SB_SUBSYS;
1135 else if (strchr(attr, '%') != NULL || strchr(attr, '$') != NULL)
1136 token->key.attrsubst = SB_FORMAT;
1138 token->key.attrsubst = SB_NONE;
1141 token->key.type = type;
1143 rule_tmp->token_cur++;
1144 if (rule_tmp->token_cur >= ARRAY_SIZE(rule_tmp->token)) {
1145 err(rule_tmp->rules->udev, "temporary rule array too small\n");
1151 static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp)
1154 unsigned int start = 0;
1155 unsigned int end = rule_tmp->token_cur;
1157 for (i = 0; i < rule_tmp->token_cur; i++) {
1158 enum token_type next_val = TK_UNSET;
1159 unsigned int next_idx = 0;
1162 /* find smallest value */
1163 for (j = start; j < end; j++) {
1164 if (rule_tmp->token[j].type == TK_UNSET)
1166 if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
1167 next_val = rule_tmp->token[j].type;
1172 /* add token and mark done */
1173 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
1175 rule_tmp->token[next_idx].type = TK_UNSET;
1178 if (next_idx == start)
1180 if (next_idx+1 == end)
1186 static int add_rule(struct udev_rules *rules, char *line,
1187 const char *filename, unsigned int filename_off, unsigned int lineno)
1191 struct rule_tmp rule_tmp;
1193 memset(&rule_tmp, 0x00, sizeof(struct rule_tmp));
1194 rule_tmp.rules = rules;
1195 rule_tmp.rule.type = TK_RULE;
1196 rule_tmp.rule.rule.filename_off = filename_off;
1197 rule_tmp.rule.rule.filename_line = lineno;
1203 enum operation_type op;
1205 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0)
1208 if (strcmp(key, "ACTION") == 0) {
1209 if (op > OP_MATCH_MAX) {
1210 err(rules->udev, "invalid ACTION operation\n");
1213 rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL);
1217 if (strcmp(key, "DEVPATH") == 0) {
1218 if (op > OP_MATCH_MAX) {
1219 err(rules->udev, "invalid DEVPATH operation\n");
1222 rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
1226 if (strcmp(key, "KERNEL") == 0) {
1227 if (op > OP_MATCH_MAX) {
1228 err(rules->udev, "invalid KERNEL operation\n");
1231 rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL);
1235 if (strcmp(key, "SUBSYSTEM") == 0) {
1236 if (op > OP_MATCH_MAX) {
1237 err(rules->udev, "invalid SUBSYSTEM operation\n");
1240 /* bus, class, subsystem events should all be the same */
1241 if (strcmp(value, "subsystem") == 0 ||
1242 strcmp(value, "bus") == 0 ||
1243 strcmp(value, "class") == 0) {
1244 if (strcmp(value, "bus") == 0 || strcmp(value, "class") == 0)
1245 err(rules->udev, "'%s' must be specified as 'subsystem' \n"
1246 "please fix it in %s:%u", value, filename, lineno);
1247 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
1249 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
1253 if (strcmp(key, "DRIVER") == 0) {
1254 if (op > OP_MATCH_MAX) {
1255 err(rules->udev, "invalid DRIVER operation\n");
1258 rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL);
1262 if (strncmp(key, "ATTR{", sizeof("ATTR{")-1) == 0) {
1263 attr = get_key_attribute(rules->udev, key + sizeof("ATTR")-1);
1265 err(rules->udev, "error parsing ATTR attribute\n");
1268 if (op < OP_MATCH_MAX) {
1269 rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
1271 rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr);
1276 if (strcmp(key, "KERNELS") == 0) {
1277 if (op > OP_MATCH_MAX) {
1278 err(rules->udev, "invalid KERNELS operation\n");
1281 rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1285 if (strcmp(key, "SUBSYSTEMS") == 0) {
1286 if (op > OP_MATCH_MAX) {
1287 err(rules->udev, "invalid SUBSYSTEMS operation\n");
1290 rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1294 if (strcmp(key, "DRIVERS") == 0) {
1295 if (op > OP_MATCH_MAX) {
1296 err(rules->udev, "invalid DRIVERS operation\n");
1299 rule_add_key(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
1303 if (strncmp(key, "ATTRS{", sizeof("ATTRS{")-1) == 0) {
1304 if (op > OP_MATCH_MAX) {
1305 err(rules->udev, "invalid ATTRS operation\n");
1308 attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
1310 err(rules->udev, "error parsing ATTRS attribute\n");
1313 if (strncmp(attr, "device/", 7) == 0)
1314 err(rules->udev, "the 'device' link may not be available in a future kernel, "
1315 "please fix it in %s:%u", filename, lineno);
1316 else if (strstr(attr, "../") != NULL)
1317 err(rules->udev, "do not reference parent sysfs directories directly, "
1318 "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
1319 rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1323 if (strcmp(key, "TAGS") == 0) {
1324 if (op > OP_MATCH_MAX) {
1325 err(rules->udev, "invalid TAGS operation\n");
1328 rule_add_key(&rule_tmp, TK_M_TAGS, op, value, NULL);
1332 if (strncmp(key, "ENV{", sizeof("ENV{")-1) == 0) {
1333 attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1);
1335 err(rules->udev, "error parsing ENV attribute\n");
1338 if (op < OP_MATCH_MAX) {
1339 if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
1342 static const char *blacklist[] = {
1357 for (i = 0; i < ARRAY_SIZE(blacklist); i++)
1358 if (strcmp(attr, blacklist[i]) == 0) {
1359 err(rules->udev, "invalid ENV attribute, '%s' can not be set %s:%u\n", attr, filename, lineno);
1362 if (rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
1368 if (strcmp(key, "TAG") == 0) {
1369 if (op < OP_MATCH_MAX)
1370 rule_add_key(&rule_tmp, TK_M_TAG, op, value, NULL);
1372 rule_add_key(&rule_tmp, TK_A_TAG, op, value, NULL);
1376 if (strcmp(key, "PROGRAM") == 0) {
1377 rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
1381 if (strcmp(key, "RESULT") == 0) {
1382 if (op > OP_MATCH_MAX) {
1383 err(rules->udev, "invalid RESULT operation\n");
1386 rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL);
1390 if (strncmp(key, "IMPORT", sizeof("IMPORT")-1) == 0) {
1391 attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1);
1393 err(rules->udev, "IMPORT{} type missing, ignoring IMPORT %s:%u\n", filename, lineno);
1396 if (strstr(attr, "program")) {
1397 /* find known built-in command */
1398 if (value[0] != '/') {
1399 char file[UTIL_PATH_SIZE];
1401 enum udev_builtin_cmd cmd;
1403 util_strscpy(file, sizeof(file), value);
1404 pos = strchr(file, ' ');
1407 cmd = udev_builtin_lookup(file);
1408 if (cmd < UDEV_BUILTIN_MAX) {
1409 info(rules->udev, "IMPORT found builtin '%s', replacing %s:%u\n", file, filename, lineno);
1410 rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, NULL, &cmd);
1414 dbg(rules->udev, "IMPORT will be executed\n");
1415 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1416 } else if (strstr(attr, "builtin")) {
1417 enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
1419 dbg(rules->udev, "IMPORT execute builtin\n");
1420 if (cmd < UDEV_BUILTIN_MAX)
1421 rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, NULL, &cmd);
1423 err(rules->udev, "IMPORT{builtin}: '%s' unknown %s:%u\n", value, filename, lineno);
1424 } else if (strstr(attr, "file")) {
1425 dbg(rules->udev, "IMPORT will be included as file\n");
1426 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1427 } else if (strstr(attr, "db")) {
1428 dbg(rules->udev, "IMPORT will include db values\n");
1429 rule_add_key(&rule_tmp, TK_M_IMPORT_DB, op, value, NULL);
1430 } else if (strstr(attr, "cmdline")) {
1431 dbg(rules->udev, "IMPORT will include db values\n");
1432 rule_add_key(&rule_tmp, TK_M_IMPORT_CMDLINE, op, value, NULL);
1433 } else if (strstr(attr, "parent")) {
1434 dbg(rules->udev, "IMPORT will include the parent values\n");
1435 rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
1440 if (strncmp(key, "TEST", sizeof("TEST")-1) == 0) {
1443 if (op > OP_MATCH_MAX) {
1444 err(rules->udev, "invalid TEST operation\n");
1447 attr = get_key_attribute(rules->udev, key + sizeof("TEST")-1);
1449 mode = strtol(attr, NULL, 8);
1450 rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode);
1452 rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL);
1457 if (strcmp(key, "RUN") == 0) {
1458 rule_add_key(&rule_tmp, TK_A_RUN, op, value, NULL);
1462 if (strcmp(key, "WAIT_FOR") == 0 || strcmp(key, "WAIT_FOR_SYSFS") == 0) {
1463 rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1467 if (strcmp(key, "LABEL") == 0) {
1468 rule_tmp.rule.rule.label_off = add_string(rules, value);
1472 if (strcmp(key, "GOTO") == 0) {
1473 rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1477 if (strncmp(key, "NAME", sizeof("NAME")-1) == 0) {
1478 if (op < OP_MATCH_MAX) {
1479 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
1481 if (strcmp(value, "%k") == 0) {
1482 err(rules->udev, "NAME=\"%%k\" is ignored, because it breaks kernel supplied names, "
1483 "please remove it from %s:%u\n", filename, lineno);
1486 if (value[0] == '\0') {
1487 info(rules->udev, "NAME=\"\" is ignored, because udev will not delete any device nodes, "
1488 "please remove it from %s:%u\n", filename, lineno);
1491 rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL);
1493 rule_tmp.rule.rule.can_set_name = true;
1497 if (strncmp(key, "SYMLINK", sizeof("SYMLINK")-1) == 0) {
1498 if (op < OP_MATCH_MAX) {
1499 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
1503 attr = get_key_attribute(rules->udev, key + sizeof("SYMLINK")-1);
1504 if (attr != NULL && strstr(attr, "unique") != NULL)
1506 rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, &flag);
1508 rule_tmp.rule.rule.can_set_name = true;
1512 if (strcmp(key, "OWNER") == 0) {
1516 uid = strtoul(value, &endptr, 10);
1517 if (endptr[0] == '\0') {
1518 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1519 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1520 uid = add_uid(rules, value);
1521 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1522 } else if (rules->resolve_names >= 0) {
1523 rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
1525 rule_tmp.rule.rule.can_set_name = true;
1529 if (strcmp(key, "GROUP") == 0) {
1533 gid = strtoul(value, &endptr, 10);
1534 if (endptr[0] == '\0') {
1535 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1536 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1537 gid = add_gid(rules, value);
1538 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1539 } else if (rules->resolve_names >= 0) {
1540 rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
1542 rule_tmp.rule.rule.can_set_name = true;
1546 if (strcmp(key, "MODE") == 0) {
1550 mode = strtol(value, &endptr, 8);
1551 if (endptr[0] == '\0')
1552 rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1554 rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
1555 rule_tmp.rule.rule.can_set_name = true;
1559 if (strcmp(key, "OPTIONS") == 0) {
1562 pos = strstr(value, "link_priority=");
1564 int prio = atoi(&pos[strlen("link_priority=")]);
1566 rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, op, NULL, &prio);
1567 dbg(rules->udev, "link priority=%i\n", prio);
1570 pos = strstr(value, "event_timeout=");
1572 int tout = atoi(&pos[strlen("event_timeout=")]);
1574 rule_add_key(&rule_tmp, TK_M_EVENT_TIMEOUT, op, NULL, &tout);
1575 dbg(rules->udev, "event timeout=%i\n", tout);
1578 pos = strstr(value, "string_escape=");
1580 pos = &pos[strlen("string_escape=")];
1581 if (strncmp(pos, "none", strlen("none")) == 0)
1582 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, op, NULL, NULL);
1583 else if (strncmp(pos, "replace", strlen("replace")) == 0)
1584 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, op, NULL, NULL);
1587 pos = strstr(value, "db_persist");
1589 rule_add_key(&rule_tmp, TK_A_DB_PERSIST, op, NULL, NULL);
1591 pos = strstr(value, "nowatch");
1595 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &off);
1596 dbg(rules->udev, "inotify watch of device disabled\n");
1598 pos = strstr(value, "watch");
1602 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &on);
1603 dbg(rules->udev, "inotify watch of device requested\n");
1607 pos = strstr(value, "static_node=");
1609 rule_add_key(&rule_tmp, TK_A_STATIC_NODE, op, &pos[strlen("static_node=")], NULL);
1610 rule_tmp.rule.rule.has_static_node = true;
1615 err(rules->udev, "unknown key '%s' in %s:%u\n", key, filename, lineno);
1618 /* add rule token */
1619 rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur;
1620 if (add_token(rules, &rule_tmp.rule) != 0)
1623 /* add tokens to list, sorted by type */
1624 if (sort_token(rules, &rule_tmp) != 0)
1629 err(rules->udev, "invalid rule '%s:%u'\n", filename, lineno);
1633 static int parse_file(struct udev_rules *rules, const char *filename, unsigned short filename_off)
1636 unsigned int first_token;
1637 char line[UTIL_LINE_SIZE];
1641 info(rules->udev, "reading '%s' as rules file\n", filename);
1643 f = fopen(filename, "r");
1647 first_token = rules->token_cur;
1649 while (fgets(line, sizeof(line), f) != NULL) {
1653 /* skip whitespace */
1656 while (isspace(key[0]))
1667 /* continue reading if backslash+newline is found */
1668 while (line[len-2] == '\\') {
1669 if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1671 if (strlen(&line[len-2]) < 2)
1677 if (len+1 >= sizeof(line)) {
1678 err(rules->udev, "line too long '%s':%u, ignored\n", filename, line_nr);
1681 add_rule(rules, key, filename, filename_off, line_nr);
1685 /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1686 for (i = first_token+1; i < rules->token_cur; i++) {
1687 if (rules->tokens[i].type == TK_A_GOTO) {
1688 char *label = &rules->buf[rules->tokens[i].key.value_off];
1691 for (j = i+1; j < rules->token_cur; j++) {
1692 if (rules->tokens[j].type != TK_RULE)
1694 if (rules->tokens[j].rule.label_off == 0)
1696 if (strcmp(label, &rules->buf[rules->tokens[j].rule.label_off]) != 0)
1698 rules->tokens[i].key.rule_goto = j;
1701 if (rules->tokens[i].key.rule_goto == 0)
1702 err(rules->udev, "GOTO '%s' has no matching label in: '%s'\n", label, filename);
1708 static int add_matching_files(struct udev *udev, struct udev_list *file_list, const char *dirname, const char *suffix)
1711 struct dirent *dent;
1712 char filename[UTIL_PATH_SIZE];
1714 dbg(udev, "open directory '%s'\n", dirname);
1715 dir = opendir(dirname);
1717 info(udev, "unable to open '%s': %m\n", dirname);
1721 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
1722 if (dent->d_name[0] == '.')
1725 /* look for file matching with specified suffix */
1726 if (suffix != NULL) {
1729 ext = strrchr(dent->d_name, '.');
1732 if (strcmp(ext, suffix) != 0)
1735 util_strscpyl(filename, sizeof(filename), dirname, "/", dent->d_name, NULL);
1736 dbg(udev, "put file '%s' into list\n", filename);
1738 * the basename is the key, the filename the value
1739 * identical basenames from different directories overwrite each other
1740 * entries are sorted after basename
1742 udev_list_entry_add(file_list, dent->d_name, filename);
1749 struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
1751 struct udev_rules *rules;
1752 struct udev_list file_list;
1753 struct udev_list_entry *file_loop;
1754 struct token end_token;
1756 rules = calloc(1, sizeof(struct udev_rules));
1760 rules->resolve_names = resolve_names;
1761 udev_list_init(udev, &file_list, true);
1763 /* init token array and string buffer */
1764 rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
1765 if (rules->tokens == NULL) {
1769 rules->token_max = PREALLOC_TOKEN;
1771 rules->buf = malloc(PREALLOC_STRBUF);
1772 if (rules->buf == NULL) {
1773 free(rules->tokens);
1777 rules->buf_max = PREALLOC_STRBUF;
1778 /* offset 0 is always '\0' */
1779 rules->buf[0] = '\0';
1781 dbg(udev, "prealloc %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1782 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1784 rules->trie_nodes = malloc(PREALLOC_TRIE * sizeof(struct trie_node));
1785 if (rules->trie_nodes == NULL) {
1787 free(rules->tokens);
1791 rules->trie_nodes_max = PREALLOC_TRIE;
1792 /* offset 0 is the trie root, with an empty string */
1793 memset(rules->trie_nodes, 0x00, sizeof(struct trie_node));
1794 rules->trie_nodes_cur = 1;
1796 if (udev_get_rules_path(udev) == NULL) {
1797 char filename[UTIL_PATH_SIZE];
1799 /* /lib/udev -- default/package rules */
1800 add_matching_files(udev, &file_list, LIBEXECDIR "/rules.d", ".rules");
1802 /* /etc/udev -- system-specific/user/admin rules */
1803 add_matching_files(udev, &file_list, SYSCONFDIR "/udev/rules.d", ".rules");
1805 /* /run/udev -- throw-away/temporary rules */
1806 util_strscpyl(filename, sizeof(filename), udev_get_run_path(udev), "/rules.d", NULL);
1807 add_matching_files(udev, &file_list, filename, ".rules");
1809 /* custom rules files location for testing */
1810 add_matching_files(udev, &file_list, udev_get_rules_path(udev), ".rules");
1813 /* add all filenames to the string buffer */
1814 udev_list_entry_foreach(file_loop, udev_list_get_entry(&file_list)) {
1815 const char *filename = udev_list_entry_get_value(file_loop);
1816 unsigned int filename_off;
1818 filename_off = add_string(rules, filename);
1819 /* the offset in the rule is limited to unsigned short */
1820 if (filename_off < USHRT_MAX)
1821 udev_list_entry_set_num(file_loop, filename_off);
1824 /* parse all rules files */
1825 udev_list_entry_foreach(file_loop, udev_list_get_entry(&file_list)) {
1826 const char *filename = udev_list_entry_get_value(file_loop);
1827 unsigned int filename_off = udev_list_entry_get_num(file_loop);
1830 if (stat(filename, &st) != 0) {
1831 err(udev, "can not find '%s': %m\n", filename);
1834 if (S_ISREG(st.st_mode) && st.st_size <= 0) {
1835 info(udev, "ignore empty '%s'\n", filename);
1838 if (S_ISCHR(st.st_mode)) {
1839 info(udev, "ignore masked '%s'\n", filename);
1842 parse_file(rules, filename, filename_off);
1844 udev_list_cleanup(&file_list);
1846 memset(&end_token, 0x00, sizeof(struct token));
1847 end_token.type = TK_END;
1848 add_token(rules, &end_token);
1850 /* shrink allocated token and string buffer */
1851 if (rules->token_cur < rules->token_max) {
1852 struct token *tokens;
1854 tokens = realloc(rules->tokens, rules->token_cur * sizeof(struct token));
1855 if (tokens != NULL || rules->token_cur == 0) {
1856 rules->tokens = tokens;
1857 rules->token_max = rules->token_cur;
1860 if (rules->buf_cur < rules->buf_max) {
1863 buf = realloc(rules->buf, rules->buf_cur);
1864 if (buf != NULL || rules->buf_cur == 0) {
1866 rules->buf_max = rules->buf_cur;
1869 info(udev, "rules use %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1870 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1871 info(udev, "temporary index used %zu bytes (%u * %zu bytes)\n",
1872 rules->trie_nodes_cur * sizeof(struct trie_node),
1873 rules->trie_nodes_cur, sizeof(struct trie_node));
1876 free(rules->trie_nodes);
1877 rules->trie_nodes = NULL;
1878 rules->trie_nodes_cur = 0;
1879 rules->trie_nodes_max = 0;
1881 /* cleanup uid/gid cache */
1884 rules->uids_cur = 0;
1885 rules->uids_max = 0;
1888 rules->gids_cur = 0;
1889 rules->gids_max = 0;
1895 void udev_rules_unref(struct udev_rules *rules)
1899 free(rules->tokens);
1901 free(rules->trie_nodes);
1907 static int match_key(struct udev_rules *rules, struct token *token, const char *val)
1909 char *key_value = &rules->buf[token->key.value_off];
1916 switch (token->key.glob) {
1918 match = (strcmp(key_value, val) == 0);
1921 match = (fnmatch(key_value, val, 0) == 0);
1928 split = &rules->buf[token->key.value_off];
1933 next = strchr(split, '|');
1935 size_t matchlen = (size_t)(next - split);
1937 match = (matchlen == len && strncmp(split, val, matchlen) == 0);
1941 match = (strcmp(split, val) == 0);
1950 char value[UTIL_PATH_SIZE];
1952 util_strscpy(value, sizeof(value), &rules->buf[token->key.value_off]);
1954 while (key_value != NULL) {
1955 pos = strchr(key_value, '|');
1960 dbg(rules->udev, "match %s '%s' <-> '%s'\n", token_str(token->type), key_value, val);
1961 match = (fnmatch(key_value, val, 0) == 0);
1969 match = (val[0] != '\0');
1975 if (match && (token->key.op == OP_MATCH)) {
1976 dbg(rules->udev, "%s is true (matching value)\n", token_str(token->type));
1979 if (!match && (token->key.op == OP_NOMATCH)) {
1980 dbg(rules->udev, "%s is true (non-matching value)\n", token_str(token->type));
1983 dbg(rules->udev, "%s is not true\n", token_str(token->type));
1987 static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur)
1990 char nbuf[UTIL_NAME_SIZE];
1992 char vbuf[UTIL_NAME_SIZE];
1995 name = &rules->buf[cur->key.attr_off];
1996 switch (cur->key.attrsubst) {
1998 udev_event_apply_format(event, name, nbuf, sizeof(nbuf));
2002 value = udev_device_get_sysattr_value(dev, name);
2007 if (util_resolve_subsys_kernel(event->udev, name, vbuf, sizeof(vbuf), 1) != 0)
2015 /* remove trailing whitespace, if not asked to match for it */
2016 len = strlen(value);
2017 if (len > 0 && isspace(value[len-1])) {
2018 const char *key_value;
2021 key_value = &rules->buf[cur->key.value_off];
2022 klen = strlen(key_value);
2023 if (klen > 0 && !isspace(key_value[klen-1])) {
2024 if (value != vbuf) {
2025 util_strscpy(vbuf, sizeof(vbuf), value);
2028 while (len > 0 && isspace(vbuf[--len]))
2030 dbg(rules->udev, "removed trailing whitespace from '%s'\n", value);
2034 return match_key(rules, cur, value);
2043 int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event, const sigset_t *sigmask)
2047 enum escape_type esc = ESCAPE_UNSET;
2050 if (rules->tokens == NULL)
2053 can_set_name = ((strcmp(udev_device_get_action(event->dev), "remove") != 0) &&
2054 (major(udev_device_get_devnum(event->dev)) > 0 ||
2055 udev_device_get_ifindex(event->dev) > 0));
2057 /* loop through token list, match, run actions or forward to next rule */
2058 cur = &rules->tokens[0];
2061 dump_token(rules, cur);
2062 switch (cur->type) {
2066 /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
2067 if (!can_set_name && rule->rule.can_set_name)
2072 if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
2076 if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
2080 if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
2083 case TK_M_DEVLINK: {
2084 size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
2085 struct udev_list_entry *list_entry;
2088 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
2089 const char *devlink;
2091 devlink = &udev_list_entry_get_name(list_entry)[devlen];
2092 if (match_key(rules, cur, devlink) == 0) {
2102 if (match_key(rules, cur, event->name) != 0)
2106 const char *key_name = &rules->buf[cur->key.attr_off];
2109 value = udev_device_get_property_value(event->dev, key_name);
2110 if (value == NULL) {
2111 dbg(event->udev, "ENV{%s} is not set, treat as empty\n", key_name);
2114 if (match_key(rules, cur, value))
2119 struct udev_list_entry *list_entry;
2122 udev_list_entry_foreach(list_entry, udev_device_get_tags_list_entry(event->dev)) {
2123 if (strcmp(&rules->buf[cur->key.value_off], udev_list_entry_get_name(list_entry)) == 0) {
2128 if (!match && (cur->key.op != OP_NOMATCH))
2132 case TK_M_SUBSYSTEM:
2133 if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
2137 if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
2140 case TK_M_WAITFOR: {
2141 char filename[UTIL_PATH_SIZE];
2144 udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename));
2145 found = (wait_for_file(event->dev, filename, 10) == 0);
2146 if (!found && (cur->key.op != OP_NOMATCH))
2151 if (match_attr(rules, event->dev, event, cur) != 0)
2155 case TK_M_SUBSYSTEMS:
2161 /* get whole sequence of parent matches */
2163 while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX)
2166 /* loop over parents */
2167 event->dev_parent = event->dev;
2171 dbg(event->udev, "parent: '%s'\n", udev_device_get_syspath(event->dev_parent));
2172 /* loop over sequence of parent match keys */
2173 for (key = cur; key < next; key++ ) {
2174 dump_token(rules, key);
2177 if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
2180 case TK_M_SUBSYSTEMS:
2181 if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
2185 if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
2189 if (match_attr(rules, event->dev_parent, event, key) != 0)
2193 bool match = udev_device_has_tag(event->dev_parent, &rules->buf[cur->key.value_off]);
2195 if (match && key->key.op == OP_NOMATCH)
2197 if (!match && key->key.op == OP_MATCH)
2204 dbg(event->udev, "parent key matched\n");
2206 dbg(event->udev, "all parent keys matched\n");
2210 event->dev_parent = udev_device_get_parent(event->dev_parent);
2211 if (event->dev_parent == NULL)
2214 /* move behind our sequence of parent match keys */
2219 char filename[UTIL_PATH_SIZE];
2220 struct stat statbuf;
2223 udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename));
2224 if (util_resolve_subsys_kernel(event->udev, filename, filename, sizeof(filename), 0) != 0) {
2225 if (filename[0] != '/') {
2226 char tmp[UTIL_PATH_SIZE];
2228 util_strscpy(tmp, sizeof(tmp), filename);
2229 util_strscpyl(filename, sizeof(filename),
2230 udev_device_get_syspath(event->dev), "/", tmp, NULL);
2233 attr_subst_subdir(filename, sizeof(filename));
2235 match = (stat(filename, &statbuf) == 0);
2236 dbg(event->udev, "'%s' %s", filename, match ? "exists\n" : "does not exist\n");
2237 if (match && cur->key.mode > 0) {
2238 match = ((statbuf.st_mode & cur->key.mode) > 0);
2239 dbg(event->udev, "'%s' has mode=%#o and %s %#o\n", filename, statbuf.st_mode,
2240 match ? "matches" : "does not match", cur->key.mode);
2242 if (match && cur->key.op == OP_NOMATCH)
2244 if (!match && cur->key.op == OP_MATCH)
2248 case TK_M_EVENT_TIMEOUT:
2249 info(event->udev, "OPTIONS event_timeout=%u\n", cur->key.event_timeout);
2250 event->timeout_usec = cur->key.event_timeout * 1000 * 1000;
2252 case TK_M_PROGRAM: {
2253 char program[UTIL_PATH_SIZE];
2255 char result[UTIL_PATH_SIZE];
2257 free(event->program_result);
2258 event->program_result = NULL;
2259 udev_event_apply_format(event, &rules->buf[cur->key.value_off], program, sizeof(program));
2260 envp = udev_device_get_properties_envp(event->dev);
2261 info(event->udev, "PROGRAM '%s' %s:%u\n",
2263 &rules->buf[rule->rule.filename_off],
2264 rule->rule.filename_line);
2266 if (udev_event_spawn(event, program, envp, sigmask, result, sizeof(result)) < 0) {
2267 if (cur->key.op != OP_NOMATCH)
2272 util_remove_trailing_chars(result, '\n');
2273 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2274 count = util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
2276 info(event->udev, "%i character(s) replaced\n" , count);
2278 event->program_result = strdup(result);
2279 dbg(event->udev, "storing result '%s'\n", event->program_result);
2280 if (cur->key.op == OP_NOMATCH)
2285 case TK_M_IMPORT_FILE: {
2286 char import[UTIL_PATH_SIZE];
2288 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2289 if (import_file_into_properties(event->dev, import) != 0)
2290 if (cur->key.op != OP_NOMATCH)
2294 case TK_M_IMPORT_PROG: {
2295 char import[UTIL_PATH_SIZE];
2297 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2298 info(event->udev, "IMPORT '%s' %s:%u\n",
2300 &rules->buf[rule->rule.filename_off],
2301 rule->rule.filename_line);
2303 if (import_program_into_properties(event, import, sigmask) != 0)
2304 if (cur->key.op != OP_NOMATCH)
2308 case TK_M_IMPORT_BUILTIN: {
2309 /* check if we ran already */
2310 if (event->builtin_run & (1 << cur->key.builtin_cmd)) {
2311 info(event->udev, "IMPORT builtin skip '%s' %s:%u\n",
2312 udev_builtin_name(cur->key.builtin_cmd),
2313 &rules->buf[rule->rule.filename_off],
2314 rule->rule.filename_line);
2315 /* return the result from earlier run */
2316 if (event->builtin_ret & (1 << cur->key.builtin_cmd))
2317 if (cur->key.op != OP_NOMATCH)
2322 event->builtin_run |= (1 << cur->key.builtin_cmd);
2323 info(event->udev, "IMPORT builtin '%s' %s:%u\n",
2324 udev_builtin_name(cur->key.builtin_cmd),
2325 &rules->buf[rule->rule.filename_off],
2326 rule->rule.filename_line);
2327 if (udev_builtin_run(event->dev, cur->key.builtin_cmd, false) != 0) {
2328 /* remember failure */
2329 info(rules->udev, "IMPORT builtin '%s' returned non-zero\n",
2330 udev_builtin_name(cur->key.builtin_cmd));
2331 event->builtin_ret |= (1 << cur->key.builtin_cmd);
2332 if (cur->key.op != OP_NOMATCH)
2337 case TK_M_IMPORT_DB: {
2338 const char *key = &rules->buf[cur->key.value_off];
2341 value = udev_device_get_property_value(event->dev_db, key);
2342 if (value != NULL) {
2343 struct udev_list_entry *entry;
2345 entry = udev_device_add_property(event->dev, key, value);
2346 udev_list_entry_set_num(entry, true);
2348 if (cur->key.op != OP_NOMATCH)
2353 case TK_M_IMPORT_CMDLINE: {
2355 bool imported = false;
2357 f = fopen("/proc/cmdline", "r");
2361 if (fgets(cmdline, sizeof(cmdline), f) != NULL) {
2362 const char *key = &rules->buf[cur->key.value_off];
2365 pos = strstr(cmdline, key);
2367 struct udev_list_entry *entry;
2370 if (pos[0] == '\0' || isspace(pos[0])) {
2371 /* we import simple flags as 'FLAG=1' */
2372 entry = udev_device_add_property(event->dev, key, "1");
2373 udev_list_entry_set_num(entry, true);
2375 } else if (pos[0] == '=') {
2380 while (pos[0] != '\0' && !isspace(pos[0]))
2383 entry = udev_device_add_property(event->dev, key, value);
2384 udev_list_entry_set_num(entry, true);
2391 if (!imported && cur->key.op != OP_NOMATCH)
2395 case TK_M_IMPORT_PARENT: {
2396 char import[UTIL_PATH_SIZE];
2398 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2399 if (import_parent_into_properties(event->dev, import) != 0)
2400 if (cur->key.op != OP_NOMATCH)
2405 if (match_key(rules, cur, event->program_result) != 0)
2408 case TK_A_STRING_ESCAPE_NONE:
2411 case TK_A_STRING_ESCAPE_REPLACE:
2412 esc = ESCAPE_REPLACE;
2414 case TK_A_DB_PERSIST:
2415 udev_device_set_db_persist(event->dev);
2417 case TK_A_INOTIFY_WATCH:
2418 if (event->inotify_watch_final)
2420 if (cur->key.op == OP_ASSIGN_FINAL)
2421 event->inotify_watch_final = true;
2422 event->inotify_watch = cur->key.watch;
2424 case TK_A_DEVLINK_PRIO:
2425 udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
2428 char owner[UTIL_NAME_SIZE];
2430 if (event->owner_final)
2432 if (cur->key.op == OP_ASSIGN_FINAL)
2433 event->owner_final = true;
2434 udev_event_apply_format(event, &rules->buf[cur->key.value_off], owner, sizeof(owner));
2435 event->uid = util_lookup_user(event->udev, owner);
2436 info(event->udev, "OWNER %u %s:%u\n",
2438 &rules->buf[rule->rule.filename_off],
2439 rule->rule.filename_line);
2443 char group[UTIL_NAME_SIZE];
2445 if (event->group_final)
2447 if (cur->key.op == OP_ASSIGN_FINAL)
2448 event->group_final = true;
2449 udev_event_apply_format(event, &rules->buf[cur->key.value_off], group, sizeof(group));
2450 event->gid = util_lookup_group(event->udev, group);
2451 info(event->udev, "GROUP %u %s:%u\n",
2453 &rules->buf[rule->rule.filename_off],
2454 rule->rule.filename_line);
2458 char mode_str[UTIL_NAME_SIZE];
2462 if (event->mode_final)
2464 udev_event_apply_format(event, &rules->buf[cur->key.value_off], mode_str, sizeof(mode_str));
2465 mode = strtol(mode_str, &endptr, 8);
2466 if (endptr[0] != '\0') {
2467 err(event->udev, "ignoring invalid mode '%s'\n", mode_str);
2470 if (cur->key.op == OP_ASSIGN_FINAL)
2471 event->mode_final = true;
2472 event->mode_set = true;
2474 info(event->udev, "MODE %#o %s:%u\n",
2476 &rules->buf[rule->rule.filename_off],
2477 rule->rule.filename_line);
2481 if (event->owner_final)
2483 if (cur->key.op == OP_ASSIGN_FINAL)
2484 event->owner_final = true;
2485 event->uid = cur->key.uid;
2486 info(event->udev, "OWNER %u %s:%u\n",
2488 &rules->buf[rule->rule.filename_off],
2489 rule->rule.filename_line);
2492 if (event->group_final)
2494 if (cur->key.op == OP_ASSIGN_FINAL)
2495 event->group_final = true;
2496 event->gid = cur->key.gid;
2497 info(event->udev, "GROUP %u %s:%u\n",
2499 &rules->buf[rule->rule.filename_off],
2500 rule->rule.filename_line);
2503 if (event->mode_final)
2505 if (cur->key.op == OP_ASSIGN_FINAL)
2506 event->mode_final = true;
2507 event->mode_set = true;
2508 event->mode = cur->key.mode;
2509 info(event->udev, "MODE %#o %s:%u\n",
2511 &rules->buf[rule->rule.filename_off],
2512 rule->rule.filename_line);
2514 case TK_A_STATIC_NODE:
2515 event->static_node = true;
2518 const char *name = &rules->buf[cur->key.attr_off];
2519 char *value = &rules->buf[cur->key.value_off];
2521 if (value[0] != '\0') {
2522 char temp_value[UTIL_NAME_SIZE];
2523 struct udev_list_entry *entry;
2525 udev_event_apply_format(event, value, temp_value, sizeof(temp_value));
2526 entry = udev_device_add_property(event->dev, name, temp_value);
2527 /* store in db, skip private keys */
2529 udev_list_entry_set_num(entry, true);
2531 udev_device_add_property(event->dev, name, NULL);
2536 char tag[UTIL_PATH_SIZE];
2539 udev_event_apply_format(event, &rules->buf[cur->key.value_off], tag, sizeof(tag));
2540 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2541 udev_device_cleanup_tags_list(event->dev);
2542 for (p = tag; *p != '\0'; p++) {
2543 if ((*p >= 'a' && *p <= 'z') ||
2544 (*p >= 'A' && *p <= 'Z') ||
2545 (*p >= '0' && *p <= '9') ||
2546 *p == '-' || *p == '_')
2548 err(event->udev, "ignoring invalid tag name '%s'\n", tag);
2551 udev_device_add_tag(event->dev, tag);
2555 const char *name = &rules->buf[cur->key.value_off];
2556 char name_str[UTIL_PATH_SIZE];
2559 if (event->name_final)
2561 if (cur->key.op == OP_ASSIGN_FINAL)
2562 event->name_final = true;
2563 udev_event_apply_format(event, name, name_str, sizeof(name_str));
2564 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2565 count = util_replace_chars(name_str, "/");
2567 info(event->udev, "%i character(s) replaced\n", count);
2570 event->name = strdup(name_str);
2571 info(event->udev, "NAME '%s' %s:%u\n",
2573 &rules->buf[rule->rule.filename_off],
2574 rule->rule.filename_line);
2577 case TK_A_DEVLINK: {
2578 char temp[UTIL_PATH_SIZE];
2579 char filename[UTIL_PATH_SIZE];
2583 if (event->devlink_final)
2585 if (major(udev_device_get_devnum(event->dev)) == 0)
2587 if (cur->key.op == OP_ASSIGN_FINAL)
2588 event->devlink_final = true;
2589 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2590 udev_device_cleanup_devlinks_list(event->dev);
2592 /* allow multiple symlinks separated by spaces */
2593 udev_event_apply_format(event, &rules->buf[cur->key.value_off], temp, sizeof(temp));
2594 if (esc == ESCAPE_UNSET)
2595 count = util_replace_chars(temp, "/ ");
2596 else if (esc == ESCAPE_REPLACE)
2597 count = util_replace_chars(temp, "/");
2599 info(event->udev, "%i character(s) replaced\n" , count);
2600 dbg(event->udev, "rule applied, added symlink(s) '%s'\n", temp);
2602 while (isspace(pos[0]))
2604 next = strchr(pos, ' ');
2605 while (next != NULL) {
2607 info(event->udev, "LINK '%s' %s:%u\n", pos,
2608 &rules->buf[rule->rule.filename_off], rule->rule.filename_line);
2609 util_strscpyl(filename, sizeof(filename), udev_get_dev_path(event->udev), "/", pos, NULL);
2610 udev_device_add_devlink(event->dev, filename, cur->key.devlink_unique);
2611 while (isspace(next[1]))
2614 next = strchr(pos, ' ');
2616 if (pos[0] != '\0') {
2617 info(event->udev, "LINK '%s' %s:%u\n", pos,
2618 &rules->buf[rule->rule.filename_off], rule->rule.filename_line);
2619 util_strscpyl(filename, sizeof(filename), udev_get_dev_path(event->udev), "/", pos, NULL);
2620 udev_device_add_devlink(event->dev, filename, cur->key.devlink_unique);
2625 const char *key_name = &rules->buf[cur->key.attr_off];
2626 char attr[UTIL_PATH_SIZE];
2627 char value[UTIL_NAME_SIZE];
2630 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0)
2631 util_strscpyl(attr, sizeof(attr), udev_device_get_syspath(event->dev), "/", key_name, NULL);
2632 attr_subst_subdir(attr, sizeof(attr));
2634 udev_event_apply_format(event, &rules->buf[cur->key.value_off], value, sizeof(value));
2635 info(event->udev, "ATTR '%s' writing '%s' %s:%u\n", attr, value,
2636 &rules->buf[rule->rule.filename_off],
2637 rule->rule.filename_line);
2638 f = fopen(attr, "w");
2640 if (fprintf(f, "%s", value) <= 0)
2641 err(event->udev, "error writing ATTR{%s}: %m\n", attr);
2644 err(event->udev, "error opening ATTR{%s} for writing: %m\n", attr);
2649 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2650 udev_list_cleanup(&event->run_list);
2651 info(event->udev, "RUN '%s' %s:%u\n",
2652 &rules->buf[cur->key.value_off],
2653 &rules->buf[rule->rule.filename_off],
2654 rule->rule.filename_line);
2655 udev_list_entry_add(&event->run_list, &rules->buf[cur->key.value_off], NULL);
2659 if (cur->key.rule_goto == 0)
2661 cur = &rules->tokens[cur->key.rule_goto];
2666 case TK_M_PARENTS_MIN:
2667 case TK_M_PARENTS_MAX:
2670 err(rules->udev, "wrong type %u\n", cur->type);
2677 /* fast-forward to next rule */
2678 cur = rule + rule->rule.token_count;
2679 dbg(rules->udev, "forward to rule: %u\n",
2680 (unsigned int) (cur - rules->tokens));
2684 void udev_rules_apply_static_dev_perms(struct udev_rules *rules)
2692 if (rules->tokens == NULL)
2695 cur = &rules->tokens[0];
2698 switch (cur->type) {
2703 /* skip rules without a static_node tag */
2704 if (!rule->rule.has_static_node)
2718 mode = cur->key.mode;
2720 case TK_A_STATIC_NODE: {
2721 char filename[UTIL_PATH_SIZE];
2724 /* we assure, that the permissions tokens are sorted before the static token */
2725 if (mode == 0 && uid == 0 && gid == 0)
2727 util_strscpyl(filename, sizeof(filename), udev_get_dev_path(rules->udev), "/",
2728 &rules->buf[cur->key.value_off], NULL);
2729 if (stat(filename, &stats) != 0)
2731 if (!S_ISBLK(stats.st_mode) && !S_ISCHR(stats.st_mode))
2739 /* set sticky bit, so we do not remove the node on module unload */
2741 if (mode != (stats.st_mode & 01777)) {
2742 chmod(filename, mode);
2743 info(rules->udev, "chmod '%s' %#o\n", filename, mode);
2746 if ((uid != 0 && uid != stats.st_uid) || (gid != 0 && gid != stats.st_gid)) {
2747 chown(filename, uid, gid);
2748 info(rules->udev, "chown '%s' %u %u\n", filename, uid, gid);
2751 utimensat(AT_FDCWD, filename, NULL, 0);
2761 /* fast-forward to next rule */
2762 cur = rule + rule->rule.token_count;