2 * Copyright (C) 2003-2009 Kay Sievers <kay.sievers@vrfy.org>
3 * Copyright (C) 2008 Alan Jenkins <alan-jenkins@tuffmail.co.uk>
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
34 #define PREALLOC_TOKEN 2048
35 #define PREALLOC_STRBUF 32 * 1024
36 #define PREALLOC_TRIE 256
39 unsigned int name_off;
47 /* this node's first child */
48 unsigned int child_idx;
49 /* the next child of our parent node's child list */
50 unsigned int next_child_idx;
51 /* this node's last child (shortcut for append) */
52 unsigned int last_child_idx;
53 unsigned int value_off;
54 unsigned short value_len;
62 /* every key in the rules file becomes a token */
64 unsigned int token_cur;
65 unsigned int token_max;
67 /* all key strings are copied to a single string buffer */
71 unsigned int buf_count;
73 /* during rule parsing, strings are indexed to find duplicates */
74 struct trie_node *trie_nodes;
75 unsigned int trie_nodes_cur;
76 unsigned int trie_nodes_max;
78 /* during rule parsing, uid/gid lookup results are cached */
80 unsigned int uids_cur;
81 unsigned int uids_max;
83 unsigned int gids_cur;
84 unsigned int gids_max;
87 /* KEY=="", KEY!="", KEY+="", KEY="", KEY:="" */
100 enum string_glob_type {
102 GL_PLAIN, /* no special chars */
103 GL_GLOB, /* shell globs ?,*,[] */
104 GL_SPLIT, /* multi-value A|B */
105 GL_SPLIT_GLOB, /* multi-value with glob A*|B* */
106 GL_SOMETHING, /* commonly used "?*" */
109 enum string_subst_type {
116 /* tokens of a rule are sorted/handled in this order */
121 TK_M_ACTION, /* val */
122 TK_M_DEVPATH, /* val */
123 TK_M_KERNEL, /* val */
124 TK_M_DEVLINK, /* val */
126 TK_M_ENV, /* val, attr */
127 TK_M_SUBSYSTEM, /* val */
128 TK_M_DRIVER, /* val */
129 TK_M_WAITFOR, /* val */
130 TK_M_ATTR, /* val, attr */
133 TK_M_KERNELS, /* val */
134 TK_M_SUBSYSTEMS, /* val */
135 TK_M_DRIVERS, /* val */
136 TK_M_ATTRS, /* val, attr */
139 TK_M_TEST, /* val, mode_t */
140 TK_M_PROGRAM, /* val */
141 TK_M_IMPORT_FILE, /* val */
142 TK_M_IMPORT_PROG, /* val */
143 TK_M_IMPORT_PARENT, /* val */
144 TK_M_RESULT, /* val */
148 TK_A_STRING_ESCAPE_NONE,
149 TK_A_STRING_ESCAPE_REPLACE,
150 TK_A_INOTIFY_WATCH, /* int */
151 TK_A_NUM_FAKE_PART, /* int */
152 TK_A_DEVLINK_PRIO, /* int */
153 TK_A_OWNER, /* val */
154 TK_A_GROUP, /* val */
156 TK_A_OWNER_ID, /* uid_t */
157 TK_A_GROUP_ID, /* gid_t */
158 TK_A_MODE_ID, /* mode_t */
159 TK_A_ENV, /* val, attr */
161 TK_A_DEVLINK, /* val */
162 TK_A_EVENT_TIMEOUT, /* int */
164 TK_A_ATTR, /* val, attr */
165 TK_A_RUN, /* val, bool */
166 TK_A_GOTO, /* size_t */
172 /* we try to pack stuff in a way that we take only 12 bytes per token */
175 unsigned char type; /* same as in rule and key */
177 enum token_type type:8;
178 unsigned int flags:8;
179 unsigned short token_count;
180 unsigned int label_off;
181 unsigned short filename_off;
182 unsigned short filename_line;
185 enum token_type type:8;
186 enum operation_type op:8;
187 enum string_glob_type glob:8;
188 enum string_subst_type subst:4;
189 enum string_subst_type attrsubst:4;
190 unsigned int value_off;
192 unsigned int attr_off;
194 unsigned int rule_goto;
209 struct udev_rules *rules;
211 struct token token[MAX_TK];
212 unsigned int token_cur;
216 static const char *operation_str(enum operation_type type)
218 static const char *operation_strs[] = {
219 [OP_UNSET] = "UNSET",
220 [OP_MATCH] = "match",
221 [OP_NOMATCH] = "nomatch",
222 [OP_MATCH_MAX] = "MATCH_MAX",
225 [OP_ASSIGN] = "assign",
226 [OP_ASSIGN_FINAL] = "assign-final",
229 return operation_strs[type];
232 static const char *string_glob_str(enum string_glob_type type)
234 static const char *string_glob_strs[] = {
235 [GL_UNSET] = "UNSET",
236 [GL_PLAIN] = "plain",
238 [GL_SPLIT] = "split",
239 [GL_SPLIT_GLOB] = "split-glob",
240 [GL_SOMETHING] = "split-glob",
243 return string_glob_strs[type];
246 static const char *token_str(enum token_type type)
248 static const char *token_strs[] = {
249 [TK_UNSET] = "UNSET",
252 [TK_M_ACTION] = "M ACTION",
253 [TK_M_DEVPATH] = "M DEVPATH",
254 [TK_M_KERNEL] = "M KERNEL",
255 [TK_M_DEVLINK] = "M DEVLINK",
256 [TK_M_NAME] = "M NAME",
257 [TK_M_ENV] = "M ENV",
258 [TK_M_SUBSYSTEM] = "M SUBSYSTEM",
259 [TK_M_DRIVER] = "M DRIVER",
260 [TK_M_WAITFOR] = "M WAITFOR",
261 [TK_M_ATTR] = "M ATTR",
263 [TK_M_PARENTS_MIN] = "M PARENTS_MIN",
264 [TK_M_KERNELS] = "M KERNELS",
265 [TK_M_SUBSYSTEMS] = "M SUBSYSTEMS",
266 [TK_M_DRIVERS] = "M DRIVERS",
267 [TK_M_ATTRS] = "M ATTRS",
268 [TK_M_PARENTS_MAX] = "M PARENTS_MAX",
270 [TK_M_TEST] = "M TEST",
271 [TK_M_PROGRAM] = "M PROGRAM",
272 [TK_M_IMPORT_FILE] = "M IMPORT_FILE",
273 [TK_M_IMPORT_PROG] = "M IMPORT_PROG",
274 [TK_M_IMPORT_PARENT] = "M IMPORT_PARENT",
275 [TK_M_RESULT] = "M RESULT",
276 [TK_M_MAX] = "M MAX",
278 [TK_A_IGNORE_DEVICE] = "A IGNORE_DEVICE",
279 [TK_A_STRING_ESCAPE_NONE] = "A STRING_ESCAPE_NONE",
280 [TK_A_STRING_ESCAPE_REPLACE] = "A STRING_ESCAPE_REPLACE",
281 [TK_A_INOTIFY_WATCH] = "A INOTIFY_WATCH",
282 [TK_A_NUM_FAKE_PART] = "A NUM_FAKE_PART",
283 [TK_A_DEVLINK_PRIO] = "A DEVLINK_PRIO",
284 [TK_A_OWNER] = "A OWNER",
285 [TK_A_GROUP] = "A GROUP",
286 [TK_A_MODE] = "A MODE",
287 [TK_A_OWNER_ID] = "A OWNER_ID",
288 [TK_A_GROUP_ID] = "A GROUP_ID",
289 [TK_A_MODE_ID] = "A MODE_ID",
290 [TK_A_ENV] = "A ENV",
291 [TK_A_NAME] = "A NAME",
292 [TK_A_DEVLINK] = "A DEVLINK",
293 [TK_A_EVENT_TIMEOUT] = "A EVENT_TIMEOUT",
294 [TK_A_IGNORE_REMOVE] = "A IGNORE_REMOVE",
295 [TK_A_ATTR] = "A ATTR",
296 [TK_A_RUN] = "A RUN",
297 [TK_A_GOTO] = "A GOTO",
298 [TK_A_LAST_RULE] = "A LAST_RULE",
303 return token_strs[type];
306 static void dump_token(struct udev_rules *rules, struct token *token)
308 enum token_type type = token->type;
309 enum operation_type op = token->key.op;
310 enum string_glob_type glob = token->key.glob;
311 const char *value = &rules->buf[token->key.value_off];
312 const char *attr = &rules->buf[token->key.attr_off];
317 const char *tks_ptr = (char *)rules->tokens;
318 const char *tk_ptr = (char *)token;
319 unsigned int idx = (tk_ptr - tks_ptr) / sizeof(struct token);
321 dbg(rules->udev, "* RULE %s:%u, token: %u, count: %u, label: '%s', flags: 0x%02x\n",
322 &rules->buf[token->rule.filename_off], token->rule.filename_line,
323 idx, token->rule.token_count,
324 &rules->buf[token->rule.label_off],
337 case TK_M_SUBSYSTEMS:
340 case TK_M_IMPORT_FILE:
341 case TK_M_IMPORT_PROG:
342 case TK_M_IMPORT_PARENT:
350 dbg(rules->udev, "%s %s '%s'(%s)\n",
351 token_str(type), operation_str(op), value, string_glob_str(glob));
358 dbg(rules->udev, "%s %s '%s' '%s'(%s)\n",
359 token_str(type), operation_str(op), attr, value, string_glob_str(glob));
361 case TK_A_IGNORE_DEVICE:
362 case TK_A_STRING_ESCAPE_NONE:
363 case TK_A_STRING_ESCAPE_REPLACE:
365 case TK_A_IGNORE_REMOVE:
366 dbg(rules->udev, "%s\n", token_str(type));
369 dbg(rules->udev, "%s %s '%s'(%s) %#o\n",
370 token_str(type), operation_str(op), value, string_glob_str(glob), token->key.mode);
372 case TK_A_INOTIFY_WATCH:
373 dbg(rules->udev, "%s %u\n", token_str(type), token->key.watch);
375 case TK_A_NUM_FAKE_PART:
376 dbg(rules->udev, "%s %u\n", token_str(type), token->key.num_fake_part);
378 case TK_A_DEVLINK_PRIO:
379 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.devlink_prio);
382 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.uid);
385 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.gid);
388 dbg(rules->udev, "%s %s %#o\n", token_str(type), operation_str(op), token->key.mode);
390 case TK_A_EVENT_TIMEOUT:
391 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.event_timeout);
394 dbg(rules->udev, "%s '%s' %u\n", token_str(type), value, token->key.rule_goto);
397 dbg(rules->udev, "* %s\n", token_str(type));
399 case TK_M_PARENTS_MIN:
400 case TK_M_PARENTS_MAX:
403 dbg(rules->udev, "unknown type %u\n", type);
408 static void dump_rules(struct udev_rules *rules)
412 dbg(rules->udev, "dumping %u (%zu bytes) tokens, %u (%zu bytes) strings\n",
414 rules->token_cur * sizeof(struct token),
417 for(i = 0; i < rules->token_cur; i++)
418 dump_token(rules, &rules->tokens[i]);
421 static inline const char *operation_str(enum operation_type type) { return NULL; }
422 static inline const char *token_str(enum token_type type) { return NULL; }
423 static inline void dump_token(struct udev_rules *rules, struct token *token) {}
424 static inline void dump_rules(struct udev_rules *rules) {}
425 #endif /* ENABLE_DEBUG */
427 static int add_new_string(struct udev_rules *rules, const char *str, size_t bytes)
431 /* grow buffer if needed */
432 if (rules->buf_cur + bytes+1 >= rules->buf_max) {
436 /* double the buffer size */
437 add = rules->buf_max;
441 buf = realloc(rules->buf, rules->buf_max + add);
444 dbg(rules->udev, "extend buffer from %zu to %zu\n", rules->buf_max, rules->buf_max + add);
446 rules->buf_max += add;
448 off = rules->buf_cur;
449 memcpy(&rules->buf[rules->buf_cur], str, bytes);
450 rules->buf_cur += bytes;
455 static int add_string(struct udev_rules *rules, const char *str)
457 unsigned int node_idx;
458 struct trie_node *new_node;
459 unsigned int new_node_idx;
464 struct trie_node *parent;
466 /* walk trie, start from last character of str to find matching tails */
470 for (depth = 0; depth <= len; depth++) {
471 struct trie_node *node;
472 unsigned int child_idx;
474 node = &rules->trie_nodes[node_idx];
475 off = node->value_off + node->value_len - len;
477 /* match against current node */
478 if (depth == len || (node->value_len >= len && memcmp(&rules->buf[off], str, len) == 0))
481 /* lookup child node */
482 key = str[len - 1 - depth];
483 child_idx = node->child_idx;
484 while (child_idx > 0) {
485 struct trie_node *child;
487 child = &rules->trie_nodes[child_idx];
488 if (child->key == key)
490 child_idx = child->next_child_idx;
494 node_idx = child_idx;
497 /* string not found, add it */
498 off = add_new_string(rules, str, len + 1);
500 /* grow trie nodes if needed */
501 if (rules->trie_nodes_cur >= rules->trie_nodes_max) {
502 struct trie_node *nodes;
505 /* double the buffer size */
506 add = rules->trie_nodes_max;
510 nodes = realloc(rules->trie_nodes, (rules->trie_nodes_max + add) * sizeof(struct trie_node));
513 dbg(rules->udev, "extend trie nodes from %u to %u\n",
514 rules->trie_nodes_max, rules->trie_nodes_max + add);
515 rules->trie_nodes = nodes;
516 rules->trie_nodes_max += add;
520 new_node_idx = rules->trie_nodes_cur;
521 rules->trie_nodes_cur++;
522 new_node = &rules->trie_nodes[new_node_idx];
523 memset(new_node, 0x00, sizeof(struct trie_node));
524 new_node->value_off = off;
525 new_node->value_len = len;
528 /* join the parent's child list */
529 parent = &rules->trie_nodes[node_idx];
530 if (parent->child_idx == 0) {
531 parent->child_idx = new_node_idx;
533 struct trie_node *last_child;
535 last_child = &rules->trie_nodes[parent->last_child_idx];
536 last_child->next_child_idx = new_node_idx;
538 parent->last_child_idx = new_node_idx;
542 static int add_token(struct udev_rules *rules, struct token *token)
544 /* grow buffer if needed */
545 if (rules->token_cur+1 >= rules->token_max) {
546 struct token *tokens;
549 /* double the buffer size */
550 add = rules->token_max;
554 tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
557 dbg(rules->udev, "extend tokens from %u to %u\n", rules->token_max, rules->token_max + add);
558 rules->tokens = tokens;
559 rules->token_max += add;
561 memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
566 static uid_t add_uid(struct udev_rules *rules, const char *owner)
572 /* lookup, if we know it already */
573 for (i = 0; i < rules->uids_cur; i++) {
574 off = rules->uids[i].name_off;
575 if (strcmp(&rules->buf[off], owner) == 0) {
576 uid = rules->uids[i].uid;
577 dbg(rules->udev, "return existing %u for '%s'\n", uid, owner);
581 uid = util_lookup_user(rules->udev, owner);
583 /* grow buffer if needed */
584 if (rules->uids_cur+1 >= rules->uids_max) {
585 struct uid_gid *uids;
588 /* double the buffer size */
589 add = rules->uids_max;
593 uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
596 dbg(rules->udev, "extend uids from %u to %u\n", rules->uids_max, rules->uids_max + add);
598 rules->uids_max += add;
600 rules->uids[rules->uids_cur].uid = uid;
601 off = add_string(rules, owner);
604 rules->uids[rules->uids_cur].name_off = off;
609 static gid_t add_gid(struct udev_rules *rules, const char *group)
615 /* lookup, if we know it already */
616 for (i = 0; i < rules->gids_cur; i++) {
617 off = rules->gids[i].name_off;
618 if (strcmp(&rules->buf[off], group) == 0) {
619 gid = rules->gids[i].gid;
620 dbg(rules->udev, "return existing %u for '%s'\n", gid, group);
624 gid = util_lookup_group(rules->udev, group);
626 /* grow buffer if needed */
627 if (rules->gids_cur+1 >= rules->gids_max) {
628 struct uid_gid *gids;
631 /* double the buffer size */
632 add = rules->gids_max;
636 gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid));
639 dbg(rules->udev, "extend gids from %u to %u\n", rules->gids_max, rules->gids_max + add);
641 rules->gids_max += add;
643 rules->gids[rules->gids_cur].gid = gid;
644 off = add_string(rules, group);
647 rules->gids[rules->gids_cur].name_off = off;
652 static int import_property_from_string(struct udev_device *dev, char *line)
654 struct udev *udev = udev_device_get_udev(dev);
661 while (isspace(key[0]))
664 /* comment or empty line */
665 if (key[0] == '#' || key[0] == '\0')
668 /* split key/value */
669 val = strchr(key, '=');
676 while (isspace(val[0]))
683 while (isspace(key[len-1]))
687 /* terminate value */
691 while (isspace(val[len-1]))
699 if (val[0] == '"' || val[0] == '\'') {
700 if (val[len-1] != val[0]) {
701 info(udev, "inconsistent quoting: '%s', skip\n", line);
708 dbg(udev, "adding '%s'='%s'\n", key, val);
710 /* handle device, renamed by external tool, returning new path */
711 if (strcmp(key, "DEVPATH") == 0) {
712 char syspath[UTIL_PATH_SIZE];
714 info(udev, "updating devpath from '%s' to '%s'\n",
715 udev_device_get_devpath(dev), val);
716 util_strscpyl(syspath, sizeof(syspath), udev_get_sys_path(udev), val, NULL);
717 udev_device_set_syspath(dev, syspath);
719 struct udev_list_entry *entry;
721 entry = udev_device_add_property(dev, key, val);
722 /* store in db, skip private keys */
724 udev_list_entry_set_flag(entry, 1);
729 static int import_file_into_properties(struct udev_device *dev, const char *filename)
732 char line[UTIL_LINE_SIZE];
734 f = fopen(filename, "r");
737 while (fgets(line, sizeof(line), f) != NULL)
738 import_property_from_string(dev, line);
743 static int import_program_into_properties(struct udev_device *dev, const char *program)
745 struct udev *udev = udev_device_get_udev(dev);
751 envp = udev_device_get_properties_envp(dev);
752 if (util_run_program(udev, program, envp, result, sizeof(result), &reslen, NULL) != 0)
756 while (line != NULL) {
759 pos = strchr(line, '\n');
764 import_property_from_string(dev, line);
770 static int import_parent_into_properties(struct udev_device *dev, const char *filter)
772 struct udev *udev = udev_device_get_udev(dev);
773 struct udev_device *dev_parent;
774 struct udev_list_entry *list_entry;
776 dev_parent = udev_device_get_parent(dev);
777 if (dev_parent == NULL)
780 dbg(udev, "found parent '%s', get the node name\n", udev_device_get_syspath(dev_parent));
781 udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
782 const char *key = udev_list_entry_get_name(list_entry);
783 const char *val = udev_list_entry_get_value(list_entry);
785 if (fnmatch(filter, key, 0) == 0) {
786 struct udev_list_entry *entry;
788 dbg(udev, "import key '%s=%s'\n", key, val);
789 entry = udev_device_add_property(dev, key, val);
790 /* store in db, skip private keys */
792 udev_list_entry_set_flag(entry, 1);
798 #define WAIT_LOOP_PER_SECOND 50
799 static int wait_for_file(struct udev_device *dev, const char *file, int timeout)
801 struct udev *udev = udev_device_get_udev(dev);
802 char filepath[UTIL_PATH_SIZE];
803 char devicepath[UTIL_PATH_SIZE];
805 int loop = timeout * WAIT_LOOP_PER_SECOND;
807 /* a relative path is a device attribute */
808 devicepath[0] = '\0';
809 if (file[0] != '/') {
810 util_strscpyl(devicepath, sizeof(devicepath),
811 udev_get_sys_path(udev), udev_device_get_devpath(dev), NULL);
812 util_strscpyl(filepath, sizeof(filepath), devicepath, "/", file, NULL);
816 dbg(udev, "will wait %i sec for '%s'\n", timeout, file);
818 const struct timespec duration = { 0, 1000 * 1000 * 1000 / WAIT_LOOP_PER_SECOND };
821 if (stat(file, &stats) == 0) {
822 info(udev, "file '%s' appeared after %i loops\n", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
825 /* make sure, the device did not disappear in the meantime */
826 if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
827 info(udev, "device disappeared while waiting for '%s'\n", file);
830 info(udev, "wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND);
831 nanosleep(&duration, NULL);
833 info(udev, "waiting for '%s' failed\n", file);
837 static int attr_subst_subdir(char *attr, size_t len)
841 if (strstr(attr, "/*/")) {
843 char dirname[UTIL_PATH_SIZE];
847 util_strscpy(dirname, sizeof(dirname), attr);
848 pos = strstr(dirname, "/*/");
853 dir = opendir(dirname);
857 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
860 if (dent->d_name[0] == '.')
862 util_strscpyl(attr, len, dirname, "/", dent->d_name, tail, NULL);
863 if (stat(attr, &stats) == 0) {
875 static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value)
881 if (linepos == NULL || linepos[0] == '\0')
884 /* skip whitespace */
885 while (isspace(linepos[0]) || linepos[0] == ',')
889 if (linepos[0] == '\0')
895 if (linepos[0] == '\0')
897 if (isspace(linepos[0]))
899 if (linepos[0] == '=')
901 if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
902 if (linepos[1] == '=')
906 /* remember end of key */
909 /* skip whitespace after key */
910 while (isspace(linepos[0]))
912 if (linepos[0] == '\0')
915 /* get operation type */
916 if (linepos[0] == '=' && linepos[1] == '=') {
919 } else if (linepos[0] == '!' && linepos[1] == '=') {
922 } else if (linepos[0] == '+' && linepos[1] == '=') {
925 } else if (linepos[0] == '=') {
928 } else if (linepos[0] == ':' && linepos[1] == '=') {
929 *op = OP_ASSIGN_FINAL;
937 /* skip whitespace after operator */
938 while (isspace(linepos[0]))
940 if (linepos[0] == '\0')
944 if (linepos[0] == '"')
951 temp = strchr(linepos, '"');
956 dbg(udev, "%s '%s'-'%s'\n", operation_str(*op), *key, *value);
958 /* move line to next key */
963 /* extract possible KEY{attr} */
964 static char *get_key_attribute(struct udev *udev, char *str)
969 attr = strchr(str, '{');
972 pos = strchr(attr, '}');
974 err(udev, "missing closing brace for format\n");
978 dbg(udev, "attribute='%s'\n", attr);
984 static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
985 enum operation_type op,
986 const char *value, const void *data)
988 struct token *token = &rule_tmp->token[rule_tmp->token_cur];
989 const char *attr = NULL;
991 memset(token, 0x00, sizeof(struct token));
1003 case TK_M_SUBSYSTEMS:
1006 case TK_M_IMPORT_FILE:
1007 case TK_M_IMPORT_PROG:
1008 case TK_M_IMPORT_PARENT:
1016 token->key.value_off = add_string(rule_tmp->rules, value);
1024 token->key.value_off = add_string(rule_tmp->rules, value);
1025 token->key.attr_off = add_string(rule_tmp->rules, attr);
1028 token->key.value_off = add_string(rule_tmp->rules, value);
1030 token->key.mode = *(mode_t *)data;
1032 case TK_A_IGNORE_DEVICE:
1033 case TK_A_STRING_ESCAPE_NONE:
1034 case TK_A_STRING_ESCAPE_REPLACE:
1035 case TK_A_IGNORE_REMOVE:
1036 case TK_A_LAST_RULE:
1039 token->key.value_off = add_string(rule_tmp->rules, value);
1040 token->key.ignore_error = *(int *)data;
1042 case TK_A_INOTIFY_WATCH:
1043 case TK_A_NUM_FAKE_PART:
1044 case TK_A_DEVLINK_PRIO:
1045 token->key.devlink_prio = *(int *)data;
1048 token->key.uid = *(uid_t *)data;
1051 token->key.gid = *(gid_t *)data;
1054 token->key.mode = *(mode_t *)data;
1056 case TK_A_EVENT_TIMEOUT:
1057 token->key.event_timeout = *(int *)data;
1060 case TK_M_PARENTS_MIN:
1061 case TK_M_PARENTS_MAX:
1065 err(rule_tmp->rules->udev, "wrong type %u\n", type);
1069 if (value != NULL && type < TK_M_MAX) {
1070 /* check if we need to split or call fnmatch() while matching rules */
1071 enum string_glob_type glob;
1075 has_split = (strchr(value, '|') != NULL);
1076 has_glob = (strchr(value, '*') != NULL || strchr(value, '?') != NULL || strchr(value, '[') != NULL);
1077 if (has_split && has_glob) {
1078 glob = GL_SPLIT_GLOB;
1079 } else if (has_split) {
1081 } else if (has_glob) {
1082 if (strcmp(value, "?*") == 0)
1083 glob = GL_SOMETHING;
1089 token->key.glob = glob;
1092 if (value != NULL && type > TK_M_MAX) {
1093 /* check if assigned value has substitution chars */
1094 if (value[0] == '[')
1095 token->key.subst = SB_SUBSYS;
1096 else if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
1097 token->key.subst = SB_FORMAT;
1099 token->key.subst = SB_NONE;
1103 /* check if property/attribut name has substitution chars */
1105 token->key.attrsubst = SB_SUBSYS;
1106 else if (strchr(attr, '%') != NULL || strchr(attr, '$') != NULL)
1107 token->key.attrsubst = SB_FORMAT;
1109 token->key.attrsubst = SB_NONE;
1112 token->key.type = type;
1114 rule_tmp->token_cur++;
1115 if (rule_tmp->token_cur >= ARRAY_SIZE(rule_tmp->token)) {
1116 err(rule_tmp->rules->udev, "temporary rule array too small\n");
1122 static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp)
1125 unsigned int start = 0;
1126 unsigned int end = rule_tmp->token_cur;
1128 for (i = 0; i < rule_tmp->token_cur; i++) {
1129 enum token_type next_val = TK_UNSET;
1130 unsigned int next_idx;
1133 /* find smallest value */
1134 for (j = start; j < end; j++) {
1135 if (rule_tmp->token[j].type == TK_UNSET)
1137 if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
1138 next_val = rule_tmp->token[j].type;
1143 /* add token and mark done */
1144 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
1146 rule_tmp->token[next_idx].type = TK_UNSET;
1149 if (next_idx == start)
1151 if (next_idx+1 == end)
1157 static int add_rule(struct udev_rules *rules, char *line,
1158 const char *filename, unsigned int filename_off, unsigned int lineno)
1162 struct rule_tmp rule_tmp;
1164 memset(&rule_tmp, 0x00, sizeof(struct rule_tmp));
1165 rule_tmp.rules = rules;
1166 rule_tmp.rule.type = TK_RULE;
1167 rule_tmp.rule.rule.filename_off = filename_off;
1168 rule_tmp.rule.rule.filename_line = lineno;
1174 enum operation_type op;
1176 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0)
1179 if (strcmp(key, "ACTION") == 0) {
1180 if (op > OP_MATCH_MAX) {
1181 err(rules->udev, "invalid ACTION operation\n");
1184 rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL);
1188 if (strcmp(key, "DEVPATH") == 0) {
1189 if (op > OP_MATCH_MAX) {
1190 err(rules->udev, "invalid DEVPATH operation\n");
1193 rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
1197 if (strcmp(key, "KERNEL") == 0) {
1198 if (op > OP_MATCH_MAX) {
1199 err(rules->udev, "invalid KERNEL operation\n");
1202 rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL);
1206 if (strcmp(key, "SUBSYSTEM") == 0) {
1207 if (op > OP_MATCH_MAX) {
1208 err(rules->udev, "invalid SUBSYSTEM operation\n");
1211 /* bus, class, subsystem events should all be the same */
1212 if (strcmp(value, "subsystem") == 0 ||
1213 strcmp(value, "bus") == 0 ||
1214 strcmp(value, "class") == 0) {
1215 if (strcmp(value, "bus") == 0 || strcmp(value, "class") == 0)
1216 err(rules->udev, "'%s' must be specified as 'subsystem' \n"
1217 "please fix it in %s:%u", value, filename, lineno);
1218 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
1220 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
1224 if (strcmp(key, "DRIVER") == 0) {
1225 if (op > OP_MATCH_MAX) {
1226 err(rules->udev, "invalid DRIVER operation\n");
1229 rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL);
1233 if (strncmp(key, "ATTR{", sizeof("ATTR{")-1) == 0) {
1234 attr = get_key_attribute(rules->udev, key + sizeof("ATTR")-1);
1236 err(rules->udev, "error parsing ATTR attribute\n");
1239 if (op < OP_MATCH_MAX) {
1240 rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
1242 rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr);
1247 if (strcmp(key, "KERNELS") == 0 ||
1248 strcmp(key, "ID") == 0) {
1249 if (op > OP_MATCH_MAX) {
1250 err(rules->udev, "invalid KERNELS operation\n");
1253 rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1257 if (strcmp(key, "SUBSYSTEMS") == 0 ||
1258 strcmp(key, "BUS") == 0) {
1259 if (op > OP_MATCH_MAX) {
1260 err(rules->udev, "invalid SUBSYSTEMS operation\n");
1263 rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1267 if (strcmp(key, "DRIVERS") == 0) {
1268 if (op > OP_MATCH_MAX) {
1269 err(rules->udev, "invalid DRIVERS operation\n");
1272 rule_add_key(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
1276 if (strncmp(key, "ATTRS{", sizeof("ATTRS{")-1) == 0 ||
1277 strncmp(key, "SYSFS{", sizeof("SYSFS{")-1) == 0) {
1278 if (op > OP_MATCH_MAX) {
1279 err(rules->udev, "invalid ATTRS operation\n");
1282 attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
1284 err(rules->udev, "error parsing ATTRS attribute\n");
1287 if (strncmp(attr, "device/", 7) == 0)
1288 err(rules->udev, "the 'device' link may not be available in a future kernel, "
1289 "please fix it in %s:%u", filename, lineno);
1290 else if (strstr(attr, "../") != NULL)
1291 err(rules->udev, "do not reference parent sysfs directories directly, "
1292 "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
1293 rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1297 if (strncmp(key, "ENV{", sizeof("ENV{")-1) == 0) {
1298 attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1);
1300 err(rules->udev, "error parsing ENV attribute\n");
1303 if (op < OP_MATCH_MAX) {
1304 if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
1307 if (rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
1313 if (strcmp(key, "PROGRAM") == 0) {
1314 rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
1318 if (strcmp(key, "RESULT") == 0) {
1319 if (op > OP_MATCH_MAX) {
1320 err(rules->udev, "invalid RESULT operation\n");
1323 rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL);
1327 if (strncmp(key, "IMPORT", sizeof("IMPORT")-1) == 0) {
1328 attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1);
1329 if (attr != NULL && strstr(attr, "program")) {
1330 dbg(rules->udev, "IMPORT will be executed\n");
1331 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1332 } else if (attr != NULL && strstr(attr, "file")) {
1333 dbg(rules->udev, "IMPORT will be included as file\n");
1334 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1335 } else if (attr != NULL && strstr(attr, "parent")) {
1336 dbg(rules->udev, "IMPORT will include the parent values\n");
1337 rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
1339 /* figure it out if it is executable */
1340 char file[UTIL_PATH_SIZE];
1342 struct stat statbuf;
1344 /* allow programs in /lib/udev called without the path */
1345 if (value[0] != '/')
1346 util_strscpyl(file, sizeof(file), LIBEXECDIR "/", value, NULL);
1348 util_strscpy(file, sizeof(file), value);
1349 pos = strchr(file, ' ');
1352 dbg(rules->udev, "IMPORT auto mode for '%s'\n", file);
1353 if (stat(file, &statbuf) == 0 && (statbuf.st_mode & S_IXUSR)) {
1354 dbg(rules->udev, "IMPORT will be executed (autotype)\n");
1355 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1357 dbg(rules->udev, "IMPORT will be included as file (autotype)\n");
1358 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1364 if (strncmp(key, "TEST", sizeof("TEST")-1) == 0) {
1367 if (op > OP_MATCH_MAX) {
1368 err(rules->udev, "invalid TEST operation\n");
1371 attr = get_key_attribute(rules->udev, key + sizeof("TEST")-1);
1373 mode = strtol(attr, NULL, 8);
1374 rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode);
1376 rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL);
1381 if (strncmp(key, "RUN", sizeof("RUN")-1) == 0) {
1384 attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1);
1385 if (attr != NULL && strstr(attr, "fail_event_on_error"))
1387 rule_add_key(&rule_tmp, TK_A_RUN, op, value, &flag);
1391 if (strcmp(key, "WAIT_FOR") == 0 || strcmp(key, "WAIT_FOR_SYSFS") == 0) {
1392 rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1396 if (strcmp(key, "LABEL") == 0) {
1397 rule_tmp.rule.rule.label_off = add_string(rules, value);
1401 if (strcmp(key, "GOTO") == 0) {
1402 rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1406 if (strncmp(key, "NAME", sizeof("NAME")-1) == 0) {
1407 if (op < OP_MATCH_MAX) {
1408 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
1410 if (value[0] == '\0')
1411 info(rules->udev, "name empty, node creation suppressed\n");
1412 else if (strcmp(value, "%k") == 0)
1413 err(rules->udev, "NAME=\"%%k\" is superfluous and breaks "
1414 "kernel supplied names, please remove it from %s:%u\n", filename, lineno);
1415 rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL);
1416 attr = get_key_attribute(rules->udev, key + sizeof("NAME")-1);
1418 if (strstr(attr, "all_partitions") != NULL) {
1419 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1421 dbg(rules->udev, "creation of partition nodes requested\n");
1422 rule_add_key(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1424 if (strstr(attr, "ignore_remove") != NULL) {
1425 dbg(rules->udev, "remove event should be ignored\n");
1426 rule_add_key(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1430 rule_tmp.rule.rule.flags = 1;
1434 if (strcmp(key, "SYMLINK") == 0) {
1435 if (op < OP_MATCH_MAX)
1436 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
1438 rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, NULL);
1439 rule_tmp.rule.rule.flags = 1;
1443 if (strcmp(key, "OWNER") == 0) {
1447 uid = strtoul(value, &endptr, 10);
1448 if (endptr[0] == '\0') {
1449 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1450 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1451 uid = add_uid(rules, value);
1452 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1453 } else if (rules->resolve_names >= 0) {
1454 rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
1456 rule_tmp.rule.rule.flags = 1;
1460 if (strcmp(key, "GROUP") == 0) {
1464 gid = strtoul(value, &endptr, 10);
1465 if (endptr[0] == '\0') {
1466 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1467 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1468 gid = add_gid(rules, value);
1469 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1470 } else if (rules->resolve_names >= 0) {
1471 rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
1473 rule_tmp.rule.rule.flags = 1;
1477 if (strcmp(key, "MODE") == 0) {
1481 mode = strtol(value, &endptr, 8);
1482 if (endptr[0] == '\0')
1483 rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1485 rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
1486 rule_tmp.rule.rule.flags = 1;
1490 if (strcmp(key, "OPTIONS") == 0) {
1493 if (strstr(value, "last_rule") != NULL) {
1494 dbg(rules->udev, "last rule to be applied\n");
1495 rule_add_key(&rule_tmp, TK_A_LAST_RULE, 0, NULL, NULL);
1497 if (strstr(value, "ignore_device") != NULL) {
1498 dbg(rules->udev, "device should be ignored\n");
1499 rule_add_key(&rule_tmp, TK_A_IGNORE_DEVICE, 0, NULL, NULL);
1501 if (strstr(value, "ignore_remove") != NULL) {
1502 dbg(rules->udev, "remove event should be ignored\n");
1503 rule_add_key(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1505 pos = strstr(value, "link_priority=");
1507 int prio = atoi(&pos[strlen("link_priority=")]);
1509 rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, 0, NULL, &prio);
1510 dbg(rules->udev, "link priority=%i\n", prio);
1512 pos = strstr(value, "event_timeout=");
1514 int tout = atoi(&pos[strlen("event_timeout=")]);
1516 rule_add_key(&rule_tmp, TK_A_EVENT_TIMEOUT, 0, NULL, &tout);
1517 dbg(rules->udev, "event timeout=%i\n", tout);
1519 pos = strstr(value, "string_escape=");
1521 pos = &pos[strlen("string_escape=")];
1522 if (strncmp(pos, "none", strlen("none")) == 0)
1523 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, 0, NULL, NULL);
1524 else if (strncmp(pos, "replace", strlen("replace")) == 0)
1525 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, 0, NULL, NULL);
1527 if (strstr(value, "all_partitions") != NULL) {
1528 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1530 rule_add_key(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1531 dbg(rules->udev, "creation of partition nodes requested\n");
1533 pos = strstr(value, "nowatch");
1537 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, 0, NULL, &off);
1538 dbg(rules->udev, "inotify watch of device disabled\n");
1540 pos = strstr(value, "watch");
1544 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, 0, NULL, &on);
1545 dbg(rules->udev, "inotify watch of device requested\n");
1550 err(rules->udev, "unknown key '%s' in %s:%u\n", key, filename, lineno);
1553 /* add rule token */
1554 rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur;
1555 if (add_token(rules, &rule_tmp.rule) != 0)
1558 /* add tokens to list, sorted by type */
1559 if (sort_token(rules, &rule_tmp) != 0)
1564 err(rules->udev, "invalid rule '%s:%u'\n", filename, lineno);
1568 static int parse_file(struct udev_rules *rules, const char *filename, unsigned short filename_off)
1571 unsigned int first_token;
1572 char line[UTIL_LINE_SIZE];
1576 info(rules->udev, "reading '%s' as rules file\n", filename);
1578 f = fopen(filename, "r");
1582 first_token = rules->token_cur;
1584 while (fgets(line, sizeof(line), f) != NULL) {
1588 /* skip whitespace */
1591 while (isspace(key[0]))
1602 /* continue reading if backslash+newline is found */
1603 while (line[len-2] == '\\') {
1604 if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1606 if (strlen(&line[len-2]) < 2)
1612 if (len+1 >= sizeof(line)) {
1613 err(rules->udev, "line too long '%s':%u, ignored\n", filename, line_nr);
1616 add_rule(rules, key, filename, filename_off, line_nr);
1620 /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1621 for (i = first_token+1; i < rules->token_cur; i++) {
1622 if (rules->tokens[i].type == TK_A_GOTO) {
1623 char *label = &rules->buf[rules->tokens[i].key.value_off];
1626 for (j = i+1; j < rules->token_cur; j++) {
1627 if (rules->tokens[j].type != TK_RULE)
1629 if (rules->tokens[j].rule.label_off == 0)
1631 if (strcmp(label, &rules->buf[rules->tokens[j].rule.label_off]) != 0)
1633 rules->tokens[i].key.rule_goto = j;
1636 if (rules->tokens[i].key.rule_goto == 0)
1637 err(rules->udev, "GOTO '%s' has no matching label in: '%s'\n", label, filename);
1643 static int add_matching_files(struct udev *udev, struct udev_list_node *file_list, const char *dirname, const char *suffix)
1646 char filename[UTIL_PATH_SIZE];
1648 dbg(udev, "open directory '%s'\n", dirname);
1649 dir = opendir(dirname);
1651 info(udev, "unable to open '%s': %m\n", dirname);
1656 struct dirent *dent;
1658 dent = readdir(dir);
1659 if (dent == NULL || dent->d_name[0] == '\0')
1662 if (dent->d_name[0] == '.')
1665 /* look for file matching with specified suffix */
1666 if (suffix != NULL) {
1669 ext = strrchr(dent->d_name, '.');
1672 if (strcmp(ext, suffix) != 0)
1675 util_strscpyl(filename, sizeof(filename), dirname, "/", dent->d_name, NULL);
1676 dbg(udev, "put file '%s' into list\n", filename);
1677 udev_list_entry_add(udev, file_list, filename, NULL, 1, 1);
1684 struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
1686 struct udev_rules *rules;
1687 struct stat statbuf;
1688 struct udev_list_node file_list;
1689 struct udev_list_entry *file_loop, *file_tmp;
1690 struct token end_token;
1692 rules = malloc(sizeof(struct udev_rules));
1695 memset(rules, 0x00, sizeof(struct udev_rules));
1697 rules->resolve_names = resolve_names;
1698 udev_list_init(&file_list);
1700 /* init token array and string buffer */
1701 rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
1702 if (rules->tokens == NULL)
1704 rules->token_max = PREALLOC_TOKEN;
1706 rules->buf = malloc(PREALLOC_STRBUF);
1707 if (rules->buf == NULL)
1709 rules->buf_max = PREALLOC_STRBUF;
1710 /* offset 0 is always '\0' */
1711 rules->buf[0] = '\0';
1713 dbg(udev, "prealloc %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1714 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1716 rules->trie_nodes = malloc(PREALLOC_TRIE * sizeof(struct trie_node));
1717 if (rules->trie_nodes == NULL)
1719 rules->trie_nodes_max = PREALLOC_TRIE;
1720 /* offset 0 is the trie root, with an empty string */
1721 memset(rules->trie_nodes, 0x00, sizeof(struct trie_node));
1722 rules->trie_nodes_cur = 1;
1724 if (udev_get_rules_path(udev) != NULL) {
1725 /* custom rules location for testing */
1726 add_matching_files(udev, &file_list, udev_get_rules_path(udev), ".rules");
1728 char filename[PATH_MAX];
1729 struct udev_list_node sort_list;
1730 struct udev_list_entry *sort_loop, *sort_tmp;
1732 /* read user/custom rules */
1733 add_matching_files(udev, &file_list, SYSCONFDIR "/udev/rules.d", ".rules");
1735 /* read dynamic/temporary rules */
1736 util_strscpyl(filename, sizeof(filename), udev_get_dev_path(udev), "/.udev/rules.d", NULL);
1737 if (stat(filename, &statbuf) != 0) {
1738 util_create_path(udev, filename);
1739 udev_selinux_setfscreatecon(udev, filename, S_IFDIR|0755);
1740 mkdir(filename, 0755);
1741 udev_selinux_resetfscreatecon(udev);
1743 udev_list_init(&sort_list);
1744 add_matching_files(udev, &sort_list, filename, ".rules");
1746 /* read default rules */
1747 add_matching_files(udev, &sort_list, LIBEXECDIR "/rules.d", ".rules");
1749 /* sort all rules files by basename into list of files */
1750 udev_list_entry_foreach_safe(sort_loop, sort_tmp, udev_list_get_entry(&sort_list)) {
1751 const char *sort_name = udev_list_entry_get_name(sort_loop);
1752 const char *sort_base = strrchr(sort_name, '/');
1754 if (sort_base == NULL)
1756 /* sort entry into existing list */
1757 udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1758 const char *file_name = udev_list_entry_get_name(file_loop);
1759 const char *file_base = strrchr(file_name, '/');
1761 if (file_base == NULL)
1763 if (strcmp(file_base, sort_base) == 0) {
1764 info(udev, "rule file basename '%s' already added, ignoring '%s'\n",
1765 file_name, sort_name);
1766 udev_list_entry_delete(sort_loop);
1770 if (strcmp(file_base, sort_base) > 0) {
1771 /* found later file, insert before */
1772 udev_list_entry_remove(sort_loop);
1773 udev_list_entry_insert_before(sort_loop, file_loop);
1778 /* current file already handled */
1779 if (sort_loop == NULL)
1781 /* no later file, append to end of list */
1782 udev_list_entry_remove(sort_loop);
1783 udev_list_entry_append(sort_loop, &file_list);
1787 /* add all filenames to the string buffer */
1788 udev_list_entry_foreach(file_loop, udev_list_get_entry(&file_list)) {
1789 const char *filename = udev_list_entry_get_name(file_loop);
1790 unsigned int filename_off;
1792 filename_off = add_string(rules, filename);
1793 /* the offset in the rule is limited to unsigned short */
1794 if (filename_off < USHRT_MAX)
1795 udev_list_entry_set_flag(file_loop, filename_off);
1798 /* parse list of files */
1799 udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1800 const char *filename = udev_list_entry_get_name(file_loop);
1801 unsigned int filename_off = udev_list_entry_get_flag(file_loop);
1803 if (stat(filename, &statbuf) == 0 && statbuf.st_size > 0)
1804 parse_file(rules, filename, filename_off);
1806 err(udev, "can not read '%s'\n", filename);
1807 udev_list_entry_delete(file_loop);
1810 memset(&end_token, 0x00, sizeof(struct token));
1811 end_token.type = TK_END;
1812 add_token(rules, &end_token);
1814 /* shrink allocated token and string buffer */
1815 if (rules->token_cur < rules->token_max) {
1816 struct token *tokens;
1818 tokens = realloc(rules->tokens, rules->token_cur * sizeof(struct token));
1819 if (tokens != NULL || rules->token_cur == 0) {
1820 rules->tokens = tokens;
1821 rules->token_max = rules->token_cur;
1824 if (rules->buf_cur < rules->buf_max) {
1827 buf = realloc(rules->buf, rules->buf_cur);
1828 if (buf != NULL || rules->buf_cur == 0) {
1830 rules->buf_max = rules->buf_cur;
1833 info(udev, "rules use %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1834 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1835 info(udev, "temporary index used %zu bytes (%u * %zu bytes)\n",
1836 rules->trie_nodes_cur * sizeof(struct trie_node),
1837 rules->trie_nodes_cur, sizeof(struct trie_node));
1840 free(rules->trie_nodes);
1841 rules->trie_nodes = NULL;
1842 rules->trie_nodes_cur = 0;
1843 rules->trie_nodes_max = 0;
1845 /* cleanup uid/gid cache */
1848 rules->uids_cur = 0;
1849 rules->uids_max = 0;
1852 rules->gids_cur = 0;
1853 rules->gids_max = 0;
1859 void udev_rules_unref(struct udev_rules *rules)
1863 free(rules->tokens);
1865 free(rules->trie_nodes);
1871 static int match_key(struct udev_rules *rules, struct token *token, const char *val)
1873 char *key_value = &rules->buf[token->key.value_off];
1880 switch (token->key.glob) {
1882 match = (strcmp(key_value, val) == 0);
1885 match = (fnmatch(key_value, val, 0) == 0);
1892 split = &rules->buf[token->key.value_off];
1897 next = strchr(split, '|');
1899 size_t matchlen = (size_t)(next - split);
1901 match = (matchlen == len && strncmp(split, val, matchlen) == 0);
1905 match = (strcmp(split, val) == 0);
1914 char value[UTIL_PATH_SIZE];
1916 util_strscpy(value, sizeof(value), &rules->buf[token->key.value_off]);
1918 while (key_value != NULL) {
1919 pos = strchr(key_value, '|');
1924 dbg(rules->udev, "match %s '%s' <-> '%s'\n", token_str(token->type), key_value, val);
1925 match = (fnmatch(key_value, val, 0) == 0);
1933 match = (val[0] != '\0');
1939 if (match && (token->key.op == OP_MATCH)) {
1940 dbg(rules->udev, "%s is true (matching value)\n", token_str(token->type));
1943 if (!match && (token->key.op == OP_NOMATCH)) {
1944 dbg(rules->udev, "%s is true (non-matching value)\n", token_str(token->type));
1947 dbg(rules->udev, "%s is not true\n", token_str(token->type));
1951 static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur)
1954 char nbuf[UTIL_NAME_SIZE];
1956 char vbuf[UTIL_NAME_SIZE];
1959 name = &rules->buf[cur->key.attr_off];
1960 switch (cur->key.attrsubst) {
1962 udev_event_apply_format(event, name, nbuf, sizeof(nbuf));
1966 value = udev_device_get_sysattr_value(dev, name);
1971 if (util_resolve_subsys_kernel(event->udev, name, vbuf, sizeof(vbuf), 1) != 0)
1979 /* remove trailing whitespace, if not asked to match for it */
1980 len = strlen(value);
1981 if (len > 0 && isspace(value[len-1])) {
1982 const char *key_value;
1985 key_value = &rules->buf[cur->key.value_off];
1986 klen = strlen(key_value);
1987 if (klen > 0 && !isspace(key_value[klen-1])) {
1988 if (value != vbuf) {
1989 util_strscpy(vbuf, sizeof(vbuf), value);
1992 while (len > 0 && isspace(vbuf[--len]))
1994 dbg(rules->udev, "removed trailing whitespace from '%s'\n", value);
1998 return match_key(rules, cur, value);
2007 int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event)
2011 enum escape_type esc = ESCAPE_UNSET;
2014 if (rules->tokens == NULL)
2017 can_set_name = ((strcmp(udev_device_get_action(event->dev), "add") == 0 ||
2018 strcmp(udev_device_get_action(event->dev), "change") == 0) &&
2019 (major(udev_device_get_devnum(event->dev)) > 0 ||
2020 strcmp(udev_device_get_subsystem(event->dev), "net") == 0));
2022 /* loop through token list, match, run actions or forward to next rule */
2023 cur = &rules->tokens[0];
2026 dump_token(rules, cur);
2027 switch (cur->type) {
2031 /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
2032 if (!can_set_name && rule->rule.flags)
2037 if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
2041 if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
2045 if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
2050 size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
2051 struct udev_list_entry *list_entry;
2054 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
2055 const char *devlink;
2057 devlink = &udev_list_entry_get_name(list_entry)[devlen];
2058 if (match_key(rules, cur, devlink) == 0) {
2068 if (match_key(rules, cur, event->name) != 0)
2073 const char *key_name = &rules->buf[cur->key.attr_off];
2076 value = udev_device_get_property_value(event->dev, key_name);
2077 if (value == NULL) {
2078 dbg(event->udev, "ENV{%s} is not set, treat as empty\n", key_name);
2081 if (match_key(rules, cur, value))
2085 case TK_M_SUBSYSTEM:
2086 if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
2090 if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
2095 char filename[UTIL_PATH_SIZE];
2098 udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename));
2099 found = (wait_for_file(event->dev, filename, 10) == 0);
2100 if (!found && (cur->key.op != OP_NOMATCH))
2105 if (match_attr(rules, event->dev, event, cur) != 0)
2109 case TK_M_SUBSYSTEMS:
2115 /* get whole sequence of parent matches */
2117 while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX)
2120 /* loop over parents */
2121 event->dev_parent = event->dev;
2125 dbg(event->udev, "parent: '%s'\n", udev_device_get_syspath(event->dev_parent));
2126 /* loop over sequence of parent match keys */
2127 for (key = cur; key < next; key++ ) {
2128 dump_token(rules, key);
2131 if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
2134 case TK_M_SUBSYSTEMS:
2135 if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
2139 if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
2143 if (match_attr(rules, event->dev_parent, event, key) != 0)
2149 dbg(event->udev, "parent key matched\n");
2151 dbg(event->udev, "all parent keys matched\n");
2152 /* all keys matched */
2156 event->dev_parent = udev_device_get_parent(event->dev_parent);
2157 if (event->dev_parent == NULL)
2160 /* move behind our sequence of parent match keys */
2166 char filename[UTIL_PATH_SIZE];
2167 struct stat statbuf;
2170 udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename));
2171 if (util_resolve_subsys_kernel(event->udev, filename, filename, sizeof(filename), 0) != 0) {
2172 if (filename[0] != '/') {
2173 char tmp[UTIL_PATH_SIZE];
2175 util_strscpy(tmp, sizeof(tmp), filename);
2176 util_strscpyl(filename, sizeof(filename),
2177 udev_device_get_syspath(event->dev), "/", tmp, NULL);
2180 attr_subst_subdir(filename, sizeof(filename));
2182 match = (stat(filename, &statbuf) == 0);
2183 dbg(event->udev, "'%s' %s", filename, match ? "exists\n" : "does not exist\n");
2184 if (match && cur->key.mode > 0) {
2185 match = ((statbuf.st_mode & cur->key.mode) > 0);
2186 dbg(event->udev, "'%s' has mode=%#o and %s %#o\n", filename, statbuf.st_mode,
2187 match ? "matches" : "does not match", cur->key.mode);
2189 if (match && cur->key.op == OP_NOMATCH)
2191 if (!match && cur->key.op == OP_MATCH)
2197 char program[UTIL_PATH_SIZE];
2199 char result[UTIL_PATH_SIZE];
2201 free(event->program_result);
2202 event->program_result = NULL;
2203 udev_event_apply_format(event, &rules->buf[cur->key.value_off], program, sizeof(program));
2204 envp = udev_device_get_properties_envp(event->dev);
2205 info(event->udev, "PROGRAM '%s' %s:%u\n",
2207 &rules->buf[rule->rule.filename_off],
2208 rule->rule.filename_line);
2209 if (util_run_program(event->udev, program, envp, result, sizeof(result), NULL, NULL) != 0) {
2210 if (cur->key.op != OP_NOMATCH)
2215 util_remove_trailing_chars(result, '\n');
2216 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2217 count = udev_util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
2219 info(event->udev, "%i character(s) replaced\n" , count);
2221 event->program_result = strdup(result);
2222 dbg(event->udev, "storing result '%s'\n", event->program_result);
2223 if (cur->key.op == OP_NOMATCH)
2228 case TK_M_IMPORT_FILE:
2230 char import[UTIL_PATH_SIZE];
2232 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2233 if (import_file_into_properties(event->dev, import) != 0)
2234 if (cur->key.op != OP_NOMATCH)
2238 case TK_M_IMPORT_PROG:
2240 char import[UTIL_PATH_SIZE];
2242 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2243 info(event->udev, "IMPORT '%s' %s:%u\n",
2245 &rules->buf[rule->rule.filename_off],
2246 rule->rule.filename_line);
2247 if (import_program_into_properties(event->dev, import) != 0)
2248 if (cur->key.op != OP_NOMATCH)
2252 case TK_M_IMPORT_PARENT:
2254 char import[UTIL_PATH_SIZE];
2256 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2257 if (import_parent_into_properties(event->dev, import) != 0)
2258 if (cur->key.op != OP_NOMATCH)
2263 if (match_key(rules, cur, event->program_result) != 0)
2267 case TK_A_IGNORE_DEVICE:
2268 event->ignore_device = 1;
2271 case TK_A_STRING_ESCAPE_NONE:
2274 case TK_A_STRING_ESCAPE_REPLACE:
2275 esc = ESCAPE_REPLACE;
2277 case TK_A_NUM_FAKE_PART:
2278 if (strcmp(udev_device_get_subsystem(event->dev), "block") != 0)
2280 if (udev_device_get_sysnum(event->dev) != NULL)
2282 udev_device_set_num_fake_partitions(event->dev, cur->key.num_fake_part);
2284 case TK_A_INOTIFY_WATCH:
2285 event->inotify_watch = cur->key.watch;
2287 case TK_A_DEVLINK_PRIO:
2288 udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
2292 char owner[UTIL_NAME_SIZE];
2294 if (event->owner_final)
2296 if (cur->key.op == OP_ASSIGN_FINAL)
2297 event->owner_final = 1;
2298 udev_event_apply_format(event, &rules->buf[cur->key.value_off], owner, sizeof(owner));
2299 event->uid = util_lookup_user(event->udev, owner);
2300 info(event->udev, "OWNER %u %s:%u\n",
2302 &rules->buf[rule->rule.filename_off],
2303 rule->rule.filename_line);
2308 char group[UTIL_NAME_SIZE];
2310 if (event->group_final)
2312 if (cur->key.op == OP_ASSIGN_FINAL)
2313 event->group_final = 1;
2314 udev_event_apply_format(event, &rules->buf[cur->key.value_off], group, sizeof(group));
2315 event->gid = util_lookup_group(event->udev, group);
2316 info(event->udev, "GROUP %u %s:%u\n",
2318 &rules->buf[rule->rule.filename_off],
2319 rule->rule.filename_line);
2324 char mode[UTIL_NAME_SIZE];
2327 if (event->mode_final)
2329 if (cur->key.op == OP_ASSIGN_FINAL)
2330 event->mode_final = 1;
2331 udev_event_apply_format(event, &rules->buf[cur->key.value_off], mode, sizeof(mode));
2332 event->mode = strtol(mode, &endptr, 8);
2333 if (endptr[0] != '\0') {
2334 err(event->udev, "invalide mode '%s' set default mode 0660\n", mode);
2337 info(event->udev, "MODE %#o %s:%u\n",
2339 &rules->buf[rule->rule.filename_off],
2340 rule->rule.filename_line);
2344 if (event->owner_final)
2346 if (cur->key.op == OP_ASSIGN_FINAL)
2347 event->owner_final = 1;
2348 event->uid = cur->key.uid;
2349 info(event->udev, "OWNER %u %s:%u\n",
2351 &rules->buf[rule->rule.filename_off],
2352 rule->rule.filename_line);
2355 if (event->group_final)
2357 if (cur->key.op == OP_ASSIGN_FINAL)
2358 event->group_final = 1;
2359 event->gid = cur->key.gid;
2360 info(event->udev, "GROUP %u %s:%u\n",
2362 &rules->buf[rule->rule.filename_off],
2363 rule->rule.filename_line);
2366 if (event->mode_final)
2368 if (cur->key.op == OP_ASSIGN_FINAL)
2369 event->mode_final = 1;
2370 event->mode = cur->key.mode;
2371 info(event->udev, "MODE %#o %s:%u\n",
2373 &rules->buf[rule->rule.filename_off],
2374 rule->rule.filename_line);
2378 const char *name = &rules->buf[cur->key.attr_off];
2379 char *value = &rules->buf[cur->key.value_off];
2381 if (value[0] != '\0') {
2382 char temp_value[UTIL_NAME_SIZE];
2383 struct udev_list_entry *entry;
2385 udev_event_apply_format(event, value, temp_value, sizeof(temp_value));
2386 entry = udev_device_add_property(event->dev, name, temp_value);
2387 /* store in db, skip private keys */
2389 udev_list_entry_set_flag(entry, 1);
2391 udev_device_add_property(event->dev, name, NULL);
2397 const char *name = &rules->buf[cur->key.value_off];
2398 char name_str[UTIL_PATH_SIZE];
2401 if (event->name_final)
2403 if (cur->key.op == OP_ASSIGN_FINAL)
2404 event->name_final = 1;
2405 udev_event_apply_format(event, name, name_str, sizeof(name_str));
2406 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2407 count = udev_util_replace_chars(name_str, "/");
2409 info(event->udev, "%i character(s) replaced\n", count);
2412 event->name = strdup(name_str);
2413 info(event->udev, "NAME '%s' %s:%u\n",
2415 &rules->buf[rule->rule.filename_off],
2416 rule->rule.filename_line);
2421 char temp[UTIL_PATH_SIZE];
2422 char filename[UTIL_PATH_SIZE];
2426 if (event->devlink_final)
2428 if (major(udev_device_get_devnum(event->dev)) == 0)
2430 if (cur->key.op == OP_ASSIGN_FINAL)
2431 event->devlink_final = 1;
2432 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2433 udev_device_cleanup_devlinks_list(event->dev);
2435 /* allow multiple symlinks separated by spaces */
2436 udev_event_apply_format(event, &rules->buf[cur->key.value_off], temp, sizeof(temp));
2437 if (esc == ESCAPE_UNSET)
2438 count = udev_util_replace_chars(temp, "/ ");
2439 else if (esc == ESCAPE_REPLACE)
2440 count = udev_util_replace_chars(temp, "/");
2442 info(event->udev, "%i character(s) replaced\n" , count);
2443 dbg(event->udev, "rule applied, added symlink(s) '%s'\n", temp);
2445 while (isspace(pos[0]))
2447 next = strchr(pos, ' ');
2450 info(event->udev, "LINK '%s' %s:%u\n",
2452 &rules->buf[rule->rule.filename_off],
2453 rule->rule.filename_line);
2454 util_strscpyl(filename, sizeof(filename), udev_get_dev_path(event->udev), "/", pos, NULL);
2455 udev_device_add_devlink(event->dev, filename);
2456 while (isspace(next[1]))
2459 next = strchr(pos, ' ');
2461 if (pos[0] != '\0') {
2462 info(event->udev, "LINK '%s' %s:%u\n",
2464 &rules->buf[rule->rule.filename_off],
2465 rule->rule.filename_line);
2466 util_strscpyl(filename, sizeof(filename), udev_get_dev_path(event->udev), "/", pos, NULL);
2467 udev_device_add_devlink(event->dev, filename);
2471 case TK_A_EVENT_TIMEOUT:
2472 udev_device_set_event_timeout(event->dev, cur->key.event_timeout);
2474 case TK_A_IGNORE_REMOVE:
2475 udev_device_set_ignore_remove(event->dev, 1);
2479 const char *key_name = &rules->buf[cur->key.attr_off];
2480 char attr[UTIL_PATH_SIZE];
2481 char value[UTIL_NAME_SIZE];
2484 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0)
2485 util_strscpyl(attr, sizeof(attr), udev_device_get_syspath(event->dev), "/", key_name, NULL);
2486 attr_subst_subdir(attr, sizeof(attr));
2488 udev_event_apply_format(event, &rules->buf[cur->key.value_off], value, sizeof(value));
2489 info(event->udev, "ATTR '%s' writing '%s' %s:%u\n", attr, value,
2490 &rules->buf[rule->rule.filename_off],
2491 rule->rule.filename_line);
2492 f = fopen(attr, "w");
2494 if (fprintf(f, "%s", value) <= 0)
2495 err(event->udev, "error writing ATTR{%s}: %m\n", attr);
2498 err(event->udev, "error opening ATTR{%s} for writing: %m\n", attr);
2504 struct udev_list_entry *list_entry;
2506 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2507 udev_list_cleanup_entries(event->udev, &event->run_list);
2508 info(event->udev, "RUN '%s' %s:%u\n",
2509 &rules->buf[cur->key.value_off],
2510 &rules->buf[rule->rule.filename_off],
2511 rule->rule.filename_line);
2512 list_entry = udev_list_entry_add(event->udev, &event->run_list,
2513 &rules->buf[cur->key.value_off], NULL, 1, 0);
2514 if (cur->key.ignore_error)
2515 udev_list_entry_set_flag(list_entry, 1);
2519 if (cur->key.rule_goto == 0)
2521 cur = &rules->tokens[cur->key.rule_goto];
2523 case TK_A_LAST_RULE:
2527 case TK_M_PARENTS_MIN:
2528 case TK_M_PARENTS_MAX:
2531 err(rules->udev, "wrong type %u\n", cur->type);
2538 /* fast-forward to next rule */
2539 cur = rule + rule->rule.token_count;
2540 dbg(rules->udev, "forward to rule: %u\n",
2541 (unsigned int) (cur - rules->tokens));