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 */
128 TK_M_SUBSYSTEM, /* val */
129 TK_M_DRIVER, /* val */
130 TK_M_WAITFOR, /* val */
131 TK_M_ATTR, /* val, attr */
134 TK_M_KERNELS, /* val */
135 TK_M_SUBSYSTEMS, /* val */
136 TK_M_DRIVERS, /* val */
137 TK_M_ATTRS, /* val, attr */
140 TK_M_TEST, /* val, mode_t */
141 TK_M_PROGRAM, /* val */
142 TK_M_IMPORT_FILE, /* val */
143 TK_M_IMPORT_PROG, /* val */
144 TK_M_IMPORT_DB, /* val */
145 TK_M_IMPORT_PARENT, /* val */
146 TK_M_RESULT, /* val */
149 TK_A_STRING_ESCAPE_NONE,
150 TK_A_STRING_ESCAPE_REPLACE,
151 TK_A_INOTIFY_WATCH, /* 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 */
162 TK_A_DEVLINK, /* val */
163 TK_A_EVENT_TIMEOUT, /* int */
164 TK_A_ATTR, /* val, attr */
165 TK_A_RUN, /* val, bool */
166 TK_A_GOTO, /* size_t */
171 /* we try to pack stuff in a way that we take only 12 bytes per token */
174 unsigned char type; /* same as in rule and key */
176 enum token_type type:8;
177 unsigned int flags:8;
178 unsigned short token_count;
179 unsigned int label_off;
180 unsigned short filename_off;
181 unsigned short filename_line;
184 enum token_type type:8;
185 enum operation_type op:8;
186 enum string_glob_type glob:8;
187 enum string_subst_type subst:4;
188 enum string_subst_type attrsubst:4;
189 unsigned int value_off;
191 unsigned int attr_off;
194 unsigned int rule_goto;
208 struct udev_rules *rules;
210 struct token token[MAX_TK];
211 unsigned int token_cur;
215 static const char *operation_str(enum operation_type type)
217 static const char *operation_strs[] = {
218 [OP_UNSET] = "UNSET",
219 [OP_MATCH] = "match",
220 [OP_NOMATCH] = "nomatch",
221 [OP_MATCH_MAX] = "MATCH_MAX",
224 [OP_ASSIGN] = "assign",
225 [OP_ASSIGN_FINAL] = "assign-final",
228 return operation_strs[type];
231 static const char *string_glob_str(enum string_glob_type type)
233 static const char *string_glob_strs[] = {
234 [GL_UNSET] = "UNSET",
235 [GL_PLAIN] = "plain",
237 [GL_SPLIT] = "split",
238 [GL_SPLIT_GLOB] = "split-glob",
239 [GL_SOMETHING] = "split-glob",
242 return string_glob_strs[type];
245 static const char *token_str(enum token_type type)
247 static const char *token_strs[] = {
248 [TK_UNSET] = "UNSET",
251 [TK_M_ACTION] = "M ACTION",
252 [TK_M_DEVPATH] = "M DEVPATH",
253 [TK_M_KERNEL] = "M KERNEL",
254 [TK_M_DEVLINK] = "M DEVLINK",
255 [TK_M_NAME] = "M NAME",
256 [TK_M_ENV] = "M ENV",
257 [TK_M_SUBSYSTEM] = "M SUBSYSTEM",
258 [TK_M_DRIVER] = "M DRIVER",
259 [TK_M_WAITFOR] = "M WAITFOR",
260 [TK_M_ATTR] = "M ATTR",
262 [TK_M_PARENTS_MIN] = "M PARENTS_MIN",
263 [TK_M_KERNELS] = "M KERNELS",
264 [TK_M_SUBSYSTEMS] = "M SUBSYSTEMS",
265 [TK_M_DRIVERS] = "M DRIVERS",
266 [TK_M_ATTRS] = "M ATTRS",
267 [TK_M_PARENTS_MAX] = "M PARENTS_MAX",
269 [TK_M_TEST] = "M TEST",
270 [TK_M_PROGRAM] = "M PROGRAM",
271 [TK_M_IMPORT_FILE] = "M IMPORT_FILE",
272 [TK_M_IMPORT_PROG] = "M IMPORT_PROG",
273 [TK_M_IMPORT_DB] = "M IMPORT_DB",
274 [TK_M_IMPORT_PARENT] = "M IMPORT_PARENT",
275 [TK_M_RESULT] = "M RESULT",
276 [TK_M_MAX] = "M MAX",
278 [TK_A_STRING_ESCAPE_NONE] = "A STRING_ESCAPE_NONE",
279 [TK_A_STRING_ESCAPE_REPLACE] = "A STRING_ESCAPE_REPLACE",
280 [TK_A_INOTIFY_WATCH] = "A INOTIFY_WATCH",
281 [TK_A_DEVLINK_PRIO] = "A DEVLINK_PRIO",
282 [TK_A_OWNER] = "A OWNER",
283 [TK_A_GROUP] = "A GROUP",
284 [TK_A_MODE] = "A MODE",
285 [TK_A_OWNER_ID] = "A OWNER_ID",
286 [TK_A_GROUP_ID] = "A GROUP_ID",
287 [TK_A_MODE_ID] = "A MODE_ID",
288 [TK_A_ENV] = "A ENV",
289 [TK_A_TAG] = "A ENV",
290 [TK_A_NAME] = "A NAME",
291 [TK_A_DEVLINK] = "A DEVLINK",
292 [TK_A_EVENT_TIMEOUT] = "A EVENT_TIMEOUT",
293 [TK_A_ATTR] = "A ATTR",
294 [TK_A_RUN] = "A RUN",
295 [TK_A_GOTO] = "A GOTO",
300 return token_strs[type];
303 static void dump_token(struct udev_rules *rules, struct token *token)
305 enum token_type type = token->type;
306 enum operation_type op = token->key.op;
307 enum string_glob_type glob = token->key.glob;
308 const char *value = &rules->buf[token->key.value_off];
309 const char *attr = &rules->buf[token->key.attr_off];
314 const char *tks_ptr = (char *)rules->tokens;
315 const char *tk_ptr = (char *)token;
316 unsigned int idx = (tk_ptr - tks_ptr) / sizeof(struct token);
318 dbg(rules->udev, "* RULE %s:%u, token: %u, count: %u, label: '%s', flags: 0x%02x\n",
319 &rules->buf[token->rule.filename_off], token->rule.filename_line,
320 idx, token->rule.token_count,
321 &rules->buf[token->rule.label_off],
334 case TK_M_SUBSYSTEMS:
337 case TK_M_IMPORT_FILE:
338 case TK_M_IMPORT_PROG:
340 case TK_M_IMPORT_PARENT:
348 dbg(rules->udev, "%s %s '%s'(%s)\n",
349 token_str(type), operation_str(op), value, string_glob_str(glob));
356 dbg(rules->udev, "%s %s '%s' '%s'(%s)\n",
357 token_str(type), operation_str(op), attr, value, string_glob_str(glob));
360 dbg(rules->udev, "%s %s '%s'\n", token_str(type), operation_str(op), value);
362 case TK_A_STRING_ESCAPE_NONE:
363 case TK_A_STRING_ESCAPE_REPLACE:
364 dbg(rules->udev, "%s\n", token_str(type));
367 dbg(rules->udev, "%s %s '%s'(%s) %#o\n",
368 token_str(type), operation_str(op), value, string_glob_str(glob), token->key.mode);
370 case TK_A_INOTIFY_WATCH:
371 dbg(rules->udev, "%s %u\n", token_str(type), token->key.watch);
373 case TK_A_DEVLINK_PRIO:
374 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.devlink_prio);
377 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.uid);
380 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.gid);
383 dbg(rules->udev, "%s %s %#o\n", token_str(type), operation_str(op), token->key.mode);
385 case TK_A_EVENT_TIMEOUT:
386 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.event_timeout);
389 dbg(rules->udev, "%s '%s' %u\n", token_str(type), value, token->key.rule_goto);
392 dbg(rules->udev, "* %s\n", token_str(type));
394 case TK_M_PARENTS_MIN:
395 case TK_M_PARENTS_MAX:
398 dbg(rules->udev, "unknown type %u\n", type);
403 static void dump_rules(struct udev_rules *rules)
407 dbg(rules->udev, "dumping %u (%zu bytes) tokens, %u (%zu bytes) strings\n",
409 rules->token_cur * sizeof(struct token),
412 for(i = 0; i < rules->token_cur; i++)
413 dump_token(rules, &rules->tokens[i]);
416 static inline const char *operation_str(enum operation_type type) { return NULL; }
417 static inline const char *token_str(enum token_type type) { return NULL; }
418 static inline void dump_token(struct udev_rules *rules, struct token *token) {}
419 static inline void dump_rules(struct udev_rules *rules) {}
420 #endif /* ENABLE_DEBUG */
422 static int add_new_string(struct udev_rules *rules, const char *str, size_t bytes)
426 /* grow buffer if needed */
427 if (rules->buf_cur + bytes+1 >= rules->buf_max) {
431 /* double the buffer size */
432 add = rules->buf_max;
436 buf = realloc(rules->buf, rules->buf_max + add);
439 dbg(rules->udev, "extend buffer from %zu to %zu\n", rules->buf_max, rules->buf_max + add);
441 rules->buf_max += add;
443 off = rules->buf_cur;
444 memcpy(&rules->buf[rules->buf_cur], str, bytes);
445 rules->buf_cur += bytes;
450 static int add_string(struct udev_rules *rules, const char *str)
452 unsigned int node_idx;
453 struct trie_node *new_node;
454 unsigned int new_node_idx;
459 struct trie_node *parent;
461 /* walk trie, start from last character of str to find matching tails */
465 for (depth = 0; depth <= len; depth++) {
466 struct trie_node *node;
467 unsigned int child_idx;
469 node = &rules->trie_nodes[node_idx];
470 off = node->value_off + node->value_len - len;
472 /* match against current node */
473 if (depth == len || (node->value_len >= len && memcmp(&rules->buf[off], str, len) == 0))
476 /* lookup child node */
477 key = str[len - 1 - depth];
478 child_idx = node->child_idx;
479 while (child_idx > 0) {
480 struct trie_node *child;
482 child = &rules->trie_nodes[child_idx];
483 if (child->key == key)
485 child_idx = child->next_child_idx;
489 node_idx = child_idx;
492 /* string not found, add it */
493 off = add_new_string(rules, str, len + 1);
495 /* grow trie nodes if needed */
496 if (rules->trie_nodes_cur >= rules->trie_nodes_max) {
497 struct trie_node *nodes;
500 /* double the buffer size */
501 add = rules->trie_nodes_max;
505 nodes = realloc(rules->trie_nodes, (rules->trie_nodes_max + add) * sizeof(struct trie_node));
508 dbg(rules->udev, "extend trie nodes from %u to %u\n",
509 rules->trie_nodes_max, rules->trie_nodes_max + add);
510 rules->trie_nodes = nodes;
511 rules->trie_nodes_max += add;
515 new_node_idx = rules->trie_nodes_cur;
516 rules->trie_nodes_cur++;
517 new_node = &rules->trie_nodes[new_node_idx];
518 memset(new_node, 0x00, sizeof(struct trie_node));
519 new_node->value_off = off;
520 new_node->value_len = len;
523 /* join the parent's child list */
524 parent = &rules->trie_nodes[node_idx];
525 if (parent->child_idx == 0) {
526 parent->child_idx = new_node_idx;
528 struct trie_node *last_child;
530 last_child = &rules->trie_nodes[parent->last_child_idx];
531 last_child->next_child_idx = new_node_idx;
533 parent->last_child_idx = new_node_idx;
537 static int add_token(struct udev_rules *rules, struct token *token)
539 /* grow buffer if needed */
540 if (rules->token_cur+1 >= rules->token_max) {
541 struct token *tokens;
544 /* double the buffer size */
545 add = rules->token_max;
549 tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
552 dbg(rules->udev, "extend tokens from %u to %u\n", rules->token_max, rules->token_max + add);
553 rules->tokens = tokens;
554 rules->token_max += add;
556 memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
561 static uid_t add_uid(struct udev_rules *rules, const char *owner)
567 /* lookup, if we know it already */
568 for (i = 0; i < rules->uids_cur; i++) {
569 off = rules->uids[i].name_off;
570 if (strcmp(&rules->buf[off], owner) == 0) {
571 uid = rules->uids[i].uid;
572 dbg(rules->udev, "return existing %u for '%s'\n", uid, owner);
576 uid = util_lookup_user(rules->udev, owner);
578 /* grow buffer if needed */
579 if (rules->uids_cur+1 >= rules->uids_max) {
580 struct uid_gid *uids;
583 /* double the buffer size */
584 add = rules->uids_max;
588 uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
591 dbg(rules->udev, "extend uids from %u to %u\n", rules->uids_max, rules->uids_max + add);
593 rules->uids_max += add;
595 rules->uids[rules->uids_cur].uid = uid;
596 off = add_string(rules, owner);
599 rules->uids[rules->uids_cur].name_off = off;
604 static gid_t add_gid(struct udev_rules *rules, const char *group)
610 /* lookup, if we know it already */
611 for (i = 0; i < rules->gids_cur; i++) {
612 off = rules->gids[i].name_off;
613 if (strcmp(&rules->buf[off], group) == 0) {
614 gid = rules->gids[i].gid;
615 dbg(rules->udev, "return existing %u for '%s'\n", gid, group);
619 gid = util_lookup_group(rules->udev, group);
621 /* grow buffer if needed */
622 if (rules->gids_cur+1 >= rules->gids_max) {
623 struct uid_gid *gids;
626 /* double the buffer size */
627 add = rules->gids_max;
631 gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid));
634 dbg(rules->udev, "extend gids from %u to %u\n", rules->gids_max, rules->gids_max + add);
636 rules->gids_max += add;
638 rules->gids[rules->gids_cur].gid = gid;
639 off = add_string(rules, group);
642 rules->gids[rules->gids_cur].name_off = off;
647 static int import_property_from_string(struct udev_device *dev, char *line)
649 struct udev *udev = udev_device_get_udev(dev);
656 while (isspace(key[0]))
659 /* comment or empty line */
660 if (key[0] == '#' || key[0] == '\0')
663 /* split key/value */
664 val = strchr(key, '=');
671 while (isspace(val[0]))
678 while (isspace(key[len-1]))
682 /* terminate value */
686 while (isspace(val[len-1]))
694 if (val[0] == '"' || val[0] == '\'') {
695 if (val[len-1] != val[0]) {
696 info(udev, "inconsistent quoting: '%s', skip\n", line);
703 dbg(udev, "adding '%s'='%s'\n", key, val);
705 /* handle device, renamed by external tool, returning new path */
706 if (strcmp(key, "DEVPATH") == 0) {
707 char syspath[UTIL_PATH_SIZE];
709 info(udev, "updating devpath from '%s' to '%s'\n",
710 udev_device_get_devpath(dev), val);
711 util_strscpyl(syspath, sizeof(syspath), udev_get_sys_path(udev), val, NULL);
712 udev_device_set_syspath(dev, syspath);
714 struct udev_list_entry *entry;
716 entry = udev_device_add_property(dev, key, val);
717 /* store in db, skip private keys */
719 udev_list_entry_set_flags(entry, 1);
724 static int import_file_into_properties(struct udev_device *dev, const char *filename)
727 char line[UTIL_LINE_SIZE];
729 f = fopen(filename, "r");
732 while (fgets(line, sizeof(line), f) != NULL)
733 import_property_from_string(dev, line);
738 static int import_program_into_properties(struct udev_device *dev, const char *program)
740 struct udev *udev = udev_device_get_udev(dev);
746 envp = udev_device_get_properties_envp(dev);
747 if (util_run_program(udev, program, envp, result, sizeof(result), &reslen, NULL) != 0)
751 while (line != NULL) {
754 pos = strchr(line, '\n');
759 import_property_from_string(dev, line);
765 static int import_parent_into_properties(struct udev_device *dev, const char *filter)
767 struct udev *udev = udev_device_get_udev(dev);
768 struct udev_device *dev_parent;
769 struct udev_list_entry *list_entry;
771 dev_parent = udev_device_get_parent(dev);
772 if (dev_parent == NULL)
775 dbg(udev, "found parent '%s', get the node name\n", udev_device_get_syspath(dev_parent));
776 udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
777 const char *key = udev_list_entry_get_name(list_entry);
778 const char *val = udev_list_entry_get_value(list_entry);
780 if (fnmatch(filter, key, 0) == 0) {
781 struct udev_list_entry *entry;
783 dbg(udev, "import key '%s=%s'\n", key, val);
784 entry = udev_device_add_property(dev, key, val);
785 /* store in db, skip private keys */
787 udev_list_entry_set_flags(entry, 1);
793 #define WAIT_LOOP_PER_SECOND 50
794 static int wait_for_file(struct udev_device *dev, const char *file, int timeout)
796 struct udev *udev = udev_device_get_udev(dev);
797 char filepath[UTIL_PATH_SIZE];
798 char devicepath[UTIL_PATH_SIZE];
800 int loop = timeout * WAIT_LOOP_PER_SECOND;
802 /* a relative path is a device attribute */
803 devicepath[0] = '\0';
804 if (file[0] != '/') {
805 util_strscpyl(devicepath, sizeof(devicepath),
806 udev_get_sys_path(udev), udev_device_get_devpath(dev), NULL);
807 util_strscpyl(filepath, sizeof(filepath), devicepath, "/", file, NULL);
811 dbg(udev, "will wait %i sec for '%s'\n", timeout, file);
813 const struct timespec duration = { 0, 1000 * 1000 * 1000 / WAIT_LOOP_PER_SECOND };
816 if (stat(file, &stats) == 0) {
817 info(udev, "file '%s' appeared after %i loops\n", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
820 /* make sure, the device did not disappear in the meantime */
821 if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
822 info(udev, "device disappeared while waiting for '%s'\n", file);
825 info(udev, "wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND);
826 nanosleep(&duration, NULL);
828 info(udev, "waiting for '%s' failed\n", file);
832 static int attr_subst_subdir(char *attr, size_t len)
836 if (strstr(attr, "/*/")) {
838 char dirname[UTIL_PATH_SIZE];
842 util_strscpy(dirname, sizeof(dirname), attr);
843 pos = strstr(dirname, "/*/");
848 dir = opendir(dirname);
852 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
855 if (dent->d_name[0] == '.')
857 util_strscpyl(attr, len, dirname, "/", dent->d_name, tail, NULL);
858 if (stat(attr, &stats) == 0) {
870 static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value)
876 if (linepos == NULL || linepos[0] == '\0')
879 /* skip whitespace */
880 while (isspace(linepos[0]) || linepos[0] == ',')
884 if (linepos[0] == '\0')
890 if (linepos[0] == '\0')
892 if (isspace(linepos[0]))
894 if (linepos[0] == '=')
896 if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
897 if (linepos[1] == '=')
901 /* remember end of key */
904 /* skip whitespace after key */
905 while (isspace(linepos[0]))
907 if (linepos[0] == '\0')
910 /* get operation type */
911 if (linepos[0] == '=' && linepos[1] == '=') {
914 } else if (linepos[0] == '!' && linepos[1] == '=') {
917 } else if (linepos[0] == '+' && linepos[1] == '=') {
920 } else if (linepos[0] == '=') {
923 } else if (linepos[0] == ':' && linepos[1] == '=') {
924 *op = OP_ASSIGN_FINAL;
932 /* skip whitespace after operator */
933 while (isspace(linepos[0]))
935 if (linepos[0] == '\0')
939 if (linepos[0] == '"')
946 temp = strchr(linepos, '"');
951 dbg(udev, "%s '%s'-'%s'\n", operation_str(*op), *key, *value);
953 /* move line to next key */
958 /* extract possible KEY{attr} */
959 static char *get_key_attribute(struct udev *udev, char *str)
964 attr = strchr(str, '{');
967 pos = strchr(attr, '}');
969 err(udev, "missing closing brace for format\n");
973 dbg(udev, "attribute='%s'\n", attr);
979 static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
980 enum operation_type op,
981 const char *value, const void *data)
983 struct token *token = &rule_tmp->token[rule_tmp->token_cur];
984 const char *attr = NULL;
986 memset(token, 0x00, sizeof(struct token));
998 case TK_M_SUBSYSTEMS:
1001 case TK_M_IMPORT_FILE:
1002 case TK_M_IMPORT_PROG:
1003 case TK_M_IMPORT_DB:
1004 case TK_M_IMPORT_PARENT:
1012 token->key.value_off = add_string(rule_tmp->rules, value);
1020 token->key.value_off = add_string(rule_tmp->rules, value);
1021 token->key.attr_off = add_string(rule_tmp->rules, attr);
1024 token->key.value_off = add_string(rule_tmp->rules, value);
1025 token->key.devlink_unique = *(int *)data;
1028 token->key.value_off = add_string(rule_tmp->rules, value);
1030 token->key.mode = *(mode_t *)data;
1032 case TK_A_STRING_ESCAPE_NONE:
1033 case TK_A_STRING_ESCAPE_REPLACE:
1036 token->key.value_off = add_string(rule_tmp->rules, value);
1037 token->key.fail_on_error = *(int *)data;
1039 case TK_A_INOTIFY_WATCH:
1040 case TK_A_DEVLINK_PRIO:
1041 token->key.devlink_prio = *(int *)data;
1044 token->key.uid = *(uid_t *)data;
1047 token->key.gid = *(gid_t *)data;
1050 token->key.mode = *(mode_t *)data;
1052 case TK_A_EVENT_TIMEOUT:
1053 token->key.event_timeout = *(int *)data;
1056 case TK_M_PARENTS_MIN:
1057 case TK_M_PARENTS_MAX:
1061 err(rule_tmp->rules->udev, "wrong type %u\n", type);
1065 if (value != NULL && type < TK_M_MAX) {
1066 /* check if we need to split or call fnmatch() while matching rules */
1067 enum string_glob_type glob;
1071 has_split = (strchr(value, '|') != NULL);
1072 has_glob = (strchr(value, '*') != NULL || strchr(value, '?') != NULL || strchr(value, '[') != NULL);
1073 if (has_split && has_glob) {
1074 glob = GL_SPLIT_GLOB;
1075 } else if (has_split) {
1077 } else if (has_glob) {
1078 if (strcmp(value, "?*") == 0)
1079 glob = GL_SOMETHING;
1085 token->key.glob = glob;
1088 if (value != NULL && type > TK_M_MAX) {
1089 /* check if assigned value has substitution chars */
1090 if (value[0] == '[')
1091 token->key.subst = SB_SUBSYS;
1092 else if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
1093 token->key.subst = SB_FORMAT;
1095 token->key.subst = SB_NONE;
1099 /* check if property/attribut name has substitution chars */
1101 token->key.attrsubst = SB_SUBSYS;
1102 else if (strchr(attr, '%') != NULL || strchr(attr, '$') != NULL)
1103 token->key.attrsubst = SB_FORMAT;
1105 token->key.attrsubst = SB_NONE;
1108 token->key.type = type;
1110 rule_tmp->token_cur++;
1111 if (rule_tmp->token_cur >= ARRAY_SIZE(rule_tmp->token)) {
1112 err(rule_tmp->rules->udev, "temporary rule array too small\n");
1118 static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp)
1121 unsigned int start = 0;
1122 unsigned int end = rule_tmp->token_cur;
1124 for (i = 0; i < rule_tmp->token_cur; i++) {
1125 enum token_type next_val = TK_UNSET;
1126 unsigned int next_idx = 0;
1129 /* find smallest value */
1130 for (j = start; j < end; j++) {
1131 if (rule_tmp->token[j].type == TK_UNSET)
1133 if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
1134 next_val = rule_tmp->token[j].type;
1139 /* add token and mark done */
1140 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
1142 rule_tmp->token[next_idx].type = TK_UNSET;
1145 if (next_idx == start)
1147 if (next_idx+1 == end)
1153 static int add_rule(struct udev_rules *rules, char *line,
1154 const char *filename, unsigned int filename_off, unsigned int lineno)
1158 struct rule_tmp rule_tmp;
1159 bool bus_warn = false;
1160 bool sysfs_warn = false;
1161 bool id_warn = false;
1163 memset(&rule_tmp, 0x00, sizeof(struct rule_tmp));
1164 rule_tmp.rules = rules;
1165 rule_tmp.rule.type = TK_RULE;
1166 rule_tmp.rule.rule.filename_off = filename_off;
1167 rule_tmp.rule.rule.filename_line = lineno;
1173 enum operation_type op;
1175 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0)
1178 if (strcmp(key, "ACTION") == 0) {
1179 if (op > OP_MATCH_MAX) {
1180 err(rules->udev, "invalid ACTION operation\n");
1183 rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL);
1187 if (strcmp(key, "DEVPATH") == 0) {
1188 if (op > OP_MATCH_MAX) {
1189 err(rules->udev, "invalid DEVPATH operation\n");
1192 rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
1196 if (strcmp(key, "KERNEL") == 0) {
1197 if (op > OP_MATCH_MAX) {
1198 err(rules->udev, "invalid KERNEL operation\n");
1201 rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL);
1205 if (strcmp(key, "SUBSYSTEM") == 0) {
1206 if (op > OP_MATCH_MAX) {
1207 err(rules->udev, "invalid SUBSYSTEM operation\n");
1210 /* bus, class, subsystem events should all be the same */
1211 if (strcmp(value, "subsystem") == 0 ||
1212 strcmp(value, "bus") == 0 ||
1213 strcmp(value, "class") == 0) {
1214 if (strcmp(value, "bus") == 0 || strcmp(value, "class") == 0)
1215 err(rules->udev, "'%s' must be specified as 'subsystem' \n"
1216 "please fix it in %s:%u", value, filename, lineno);
1217 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
1219 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
1223 if (strcmp(key, "DRIVER") == 0) {
1224 if (op > OP_MATCH_MAX) {
1225 err(rules->udev, "invalid DRIVER operation\n");
1228 rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL);
1232 if (strncmp(key, "ATTR{", sizeof("ATTR{")-1) == 0) {
1233 attr = get_key_attribute(rules->udev, key + sizeof("ATTR")-1);
1235 err(rules->udev, "error parsing ATTR attribute\n");
1238 if (op < OP_MATCH_MAX) {
1239 rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
1241 rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr);
1246 if (strcmp(key, "KERNELS") == 0) {
1247 if (op > OP_MATCH_MAX) {
1248 err(rules->udev, "invalid KERNELS operation\n");
1251 rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1255 if (strcmp(key, "ID") == 0) {
1258 err(rules->udev, "ID= will be removed in a future udev version, "
1259 "please use KERNEL= to match the event device, or KERNELS= "
1260 "to match a parent device, in %s:%u\n", filename, lineno);
1262 if (op > OP_MATCH_MAX) {
1263 err(rules->udev, "invalid KERNELS operation\n");
1266 rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1270 if (strcmp(key, "SUBSYSTEMS") == 0) {
1271 if (op > OP_MATCH_MAX) {
1272 err(rules->udev, "invalid SUBSYSTEMS operation\n");
1275 rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1279 if (strcmp(key, "BUS") == 0) {
1282 err(rules->udev, "BUS= will be removed in a future udev version, "
1283 "please use SUBSYSTEM= to match the event device, or SUBSYSTEMS= "
1284 "to match a parent device, in %s:%u\n", filename, lineno);
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 (strncmp(key, "SYSFS{", sizeof("SYSFS{")-1) == 0) {
1326 err(rules->udev, "SYSFS{}= will be removed in a future udev version, "
1327 "please use ATTR{}= to match the event device, or ATTRS{}= "
1328 "to match a parent device, in %s:%u\n", filename, lineno);
1330 if (op > OP_MATCH_MAX) {
1331 err(rules->udev, "invalid ATTRS operation\n");
1334 attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
1336 err(rules->udev, "error parsing ATTRS attribute\n");
1339 rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1343 if (strncmp(key, "ENV{", sizeof("ENV{")-1) == 0) {
1344 attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1);
1346 err(rules->udev, "error parsing ENV attribute\n");
1349 if (op < OP_MATCH_MAX) {
1350 if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
1353 if (rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
1359 if (strcmp(key, "TAG") == 0) {
1360 rule_add_key(&rule_tmp, TK_A_TAG, op, value, NULL);
1364 if (strcmp(key, "PROGRAM") == 0) {
1365 rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
1369 if (strcmp(key, "RESULT") == 0) {
1370 if (op > OP_MATCH_MAX) {
1371 err(rules->udev, "invalid RESULT operation\n");
1374 rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL);
1378 if (strncmp(key, "IMPORT", sizeof("IMPORT")-1) == 0) {
1379 attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1);
1380 if (attr != NULL && strstr(attr, "program")) {
1381 dbg(rules->udev, "IMPORT will be executed\n");
1382 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1383 } else if (attr != NULL && strstr(attr, "file")) {
1384 dbg(rules->udev, "IMPORT will be included as file\n");
1385 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1386 } else if (attr != NULL && strstr(attr, "db")) {
1387 dbg(rules->udev, "IMPORT will include db values\n");
1388 rule_add_key(&rule_tmp, TK_M_IMPORT_DB, op, value, NULL);
1389 } else if (attr != NULL && strstr(attr, "parent")) {
1390 dbg(rules->udev, "IMPORT will include the parent values\n");
1391 rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
1393 /* figure it out if it is executable */
1394 char file[UTIL_PATH_SIZE];
1396 struct stat statbuf;
1398 /* allow programs in /lib/udev called without the path */
1399 if (value[0] != '/')
1400 util_strscpyl(file, sizeof(file), LIBEXECDIR "/", value, NULL);
1402 util_strscpy(file, sizeof(file), value);
1403 pos = strchr(file, ' ');
1406 dbg(rules->udev, "IMPORT auto mode for '%s'\n", file);
1407 if (stat(file, &statbuf) == 0 && (statbuf.st_mode & S_IXUSR)) {
1408 dbg(rules->udev, "IMPORT will be executed (autotype)\n");
1409 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1411 dbg(rules->udev, "IMPORT will be included as file (autotype)\n");
1412 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1418 if (strncmp(key, "TEST", sizeof("TEST")-1) == 0) {
1421 if (op > OP_MATCH_MAX) {
1422 err(rules->udev, "invalid TEST operation\n");
1425 attr = get_key_attribute(rules->udev, key + sizeof("TEST")-1);
1427 mode = strtol(attr, NULL, 8);
1428 rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode);
1430 rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL);
1435 if (strncmp(key, "RUN", sizeof("RUN")-1) == 0) {
1438 attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1);
1439 if (attr != NULL && strstr(attr, "fail_event_on_error"))
1441 rule_add_key(&rule_tmp, TK_A_RUN, op, value, &flag);
1445 if (strcmp(key, "WAIT_FOR") == 0 || strcmp(key, "WAIT_FOR_SYSFS") == 0) {
1446 rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1450 if (strcmp(key, "LABEL") == 0) {
1451 rule_tmp.rule.rule.label_off = add_string(rules, value);
1455 if (strcmp(key, "GOTO") == 0) {
1456 rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1460 if (strncmp(key, "NAME", sizeof("NAME")-1) == 0) {
1461 if (op < OP_MATCH_MAX) {
1462 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
1464 if (value[0] == '\0')
1465 info(rules->udev, "name empty, node creation suppressed\n");
1466 else if (strcmp(value, "%k") == 0)
1467 err(rules->udev, "NAME=\"%%k\" is superfluous and breaks "
1468 "kernel supplied names, please remove it from %s:%u\n", filename, lineno);
1469 rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL);
1471 rule_tmp.rule.rule.flags = 1;
1475 if (strncmp(key, "SYMLINK", sizeof("SYMLINK")-1) == 0) {
1476 if (op < OP_MATCH_MAX) {
1477 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
1481 attr = get_key_attribute(rules->udev, key + sizeof("SYMLINK")-1);
1482 if (attr != NULL && strstr(attr, "unique") != NULL)
1484 rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, &flag);
1486 rule_tmp.rule.rule.flags = 1;
1490 if (strcmp(key, "OWNER") == 0) {
1494 uid = strtoul(value, &endptr, 10);
1495 if (endptr[0] == '\0') {
1496 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1497 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1498 uid = add_uid(rules, value);
1499 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1500 } else if (rules->resolve_names >= 0) {
1501 rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
1503 rule_tmp.rule.rule.flags = 1;
1507 if (strcmp(key, "GROUP") == 0) {
1511 gid = strtoul(value, &endptr, 10);
1512 if (endptr[0] == '\0') {
1513 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1514 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1515 gid = add_gid(rules, value);
1516 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1517 } else if (rules->resolve_names >= 0) {
1518 rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
1520 rule_tmp.rule.rule.flags = 1;
1524 if (strcmp(key, "MODE") == 0) {
1528 mode = strtol(value, &endptr, 8);
1529 if (endptr[0] == '\0')
1530 rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1532 rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
1533 rule_tmp.rule.rule.flags = 1;
1537 if (strcmp(key, "OPTIONS") == 0) {
1540 pos = strstr(value, "link_priority=");
1542 int prio = atoi(&pos[strlen("link_priority=")]);
1544 rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, 0, NULL, &prio);
1545 dbg(rules->udev, "link priority=%i\n", prio);
1547 pos = strstr(value, "event_timeout=");
1549 int tout = atoi(&pos[strlen("event_timeout=")]);
1551 rule_add_key(&rule_tmp, TK_A_EVENT_TIMEOUT, 0, NULL, &tout);
1552 dbg(rules->udev, "event timeout=%i\n", tout);
1554 pos = strstr(value, "string_escape=");
1556 pos = &pos[strlen("string_escape=")];
1557 if (strncmp(pos, "none", strlen("none")) == 0)
1558 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, 0, NULL, NULL);
1559 else if (strncmp(pos, "replace", strlen("replace")) == 0)
1560 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, 0, NULL, NULL);
1562 pos = strstr(value, "nowatch");
1566 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, 0, NULL, &off);
1567 dbg(rules->udev, "inotify watch of device disabled\n");
1569 pos = strstr(value, "watch");
1573 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, 0, NULL, &on);
1574 dbg(rules->udev, "inotify watch of device requested\n");
1579 err(rules->udev, "unknown key '%s' in %s:%u\n", key, filename, lineno);
1582 /* add rule token */
1583 rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur;
1584 if (add_token(rules, &rule_tmp.rule) != 0)
1587 /* add tokens to list, sorted by type */
1588 if (sort_token(rules, &rule_tmp) != 0)
1593 err(rules->udev, "invalid rule '%s:%u'\n", filename, lineno);
1597 static int parse_file(struct udev_rules *rules, const char *filename, unsigned short filename_off)
1600 unsigned int first_token;
1601 char line[UTIL_LINE_SIZE];
1605 info(rules->udev, "reading '%s' as rules file\n", filename);
1607 f = fopen(filename, "r");
1611 first_token = rules->token_cur;
1613 while (fgets(line, sizeof(line), f) != NULL) {
1617 /* skip whitespace */
1620 while (isspace(key[0]))
1631 /* continue reading if backslash+newline is found */
1632 while (line[len-2] == '\\') {
1633 if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1635 if (strlen(&line[len-2]) < 2)
1641 if (len+1 >= sizeof(line)) {
1642 err(rules->udev, "line too long '%s':%u, ignored\n", filename, line_nr);
1645 add_rule(rules, key, filename, filename_off, line_nr);
1649 /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1650 for (i = first_token+1; i < rules->token_cur; i++) {
1651 if (rules->tokens[i].type == TK_A_GOTO) {
1652 char *label = &rules->buf[rules->tokens[i].key.value_off];
1655 for (j = i+1; j < rules->token_cur; j++) {
1656 if (rules->tokens[j].type != TK_RULE)
1658 if (rules->tokens[j].rule.label_off == 0)
1660 if (strcmp(label, &rules->buf[rules->tokens[j].rule.label_off]) != 0)
1662 rules->tokens[i].key.rule_goto = j;
1665 if (rules->tokens[i].key.rule_goto == 0)
1666 err(rules->udev, "GOTO '%s' has no matching label in: '%s'\n", label, filename);
1672 static int add_matching_files(struct udev *udev, struct udev_list_node *file_list, const char *dirname, const char *suffix)
1675 char filename[UTIL_PATH_SIZE];
1677 dbg(udev, "open directory '%s'\n", dirname);
1678 dir = opendir(dirname);
1680 info(udev, "unable to open '%s': %m\n", dirname);
1685 struct dirent *dent;
1687 dent = readdir(dir);
1688 if (dent == NULL || dent->d_name[0] == '\0')
1691 if (dent->d_name[0] == '.')
1694 /* look for file matching with specified suffix */
1695 if (suffix != NULL) {
1698 ext = strrchr(dent->d_name, '.');
1701 if (strcmp(ext, suffix) != 0)
1704 util_strscpyl(filename, sizeof(filename), dirname, "/", dent->d_name, NULL);
1705 dbg(udev, "put file '%s' into list\n", filename);
1706 udev_list_entry_add(udev, file_list, filename, NULL, 1, 1);
1713 struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
1715 struct udev_rules *rules;
1716 struct stat statbuf;
1717 struct udev_list_node file_list;
1718 struct udev_list_entry *file_loop, *file_tmp;
1719 struct token end_token;
1721 rules = malloc(sizeof(struct udev_rules));
1724 memset(rules, 0x00, sizeof(struct udev_rules));
1726 rules->resolve_names = resolve_names;
1727 udev_list_init(&file_list);
1729 /* init token array and string buffer */
1730 rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
1731 if (rules->tokens == NULL)
1733 rules->token_max = PREALLOC_TOKEN;
1735 rules->buf = malloc(PREALLOC_STRBUF);
1736 if (rules->buf == NULL)
1738 rules->buf_max = PREALLOC_STRBUF;
1739 /* offset 0 is always '\0' */
1740 rules->buf[0] = '\0';
1742 dbg(udev, "prealloc %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1743 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1745 rules->trie_nodes = malloc(PREALLOC_TRIE * sizeof(struct trie_node));
1746 if (rules->trie_nodes == NULL)
1748 rules->trie_nodes_max = PREALLOC_TRIE;
1749 /* offset 0 is the trie root, with an empty string */
1750 memset(rules->trie_nodes, 0x00, sizeof(struct trie_node));
1751 rules->trie_nodes_cur = 1;
1753 if (udev_get_rules_path(udev) != NULL) {
1754 /* custom rules location for testing */
1755 add_matching_files(udev, &file_list, udev_get_rules_path(udev), ".rules");
1757 char filename[PATH_MAX];
1758 struct udev_list_node sort_list;
1759 struct udev_list_entry *sort_loop, *sort_tmp;
1761 /* read user/custom rules */
1762 add_matching_files(udev, &file_list, SYSCONFDIR "/udev/rules.d", ".rules");
1764 /* read dynamic/temporary rules */
1765 util_strscpyl(filename, sizeof(filename), udev_get_dev_path(udev), "/.udev/rules.d", NULL);
1766 udev_list_init(&sort_list);
1767 add_matching_files(udev, &sort_list, filename, ".rules");
1769 /* read default rules */
1770 add_matching_files(udev, &sort_list, LIBEXECDIR "/rules.d", ".rules");
1772 /* sort all rules files by basename into list of files */
1773 udev_list_entry_foreach_safe(sort_loop, sort_tmp, udev_list_get_entry(&sort_list)) {
1774 const char *sort_name = udev_list_entry_get_name(sort_loop);
1775 const char *sort_base = strrchr(sort_name, '/');
1777 if (sort_base == NULL)
1779 /* sort entry into existing list */
1780 udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1781 const char *file_name = udev_list_entry_get_name(file_loop);
1782 const char *file_base = strrchr(file_name, '/');
1784 if (file_base == NULL)
1786 if (strcmp(file_base, sort_base) == 0) {
1787 info(udev, "rule file basename '%s' already added, ignoring '%s'\n",
1788 file_name, sort_name);
1789 udev_list_entry_delete(sort_loop);
1793 if (strcmp(file_base, sort_base) > 0) {
1794 /* found later file, insert before */
1795 udev_list_entry_remove(sort_loop);
1796 udev_list_entry_insert_before(sort_loop, file_loop);
1801 /* current file already handled */
1802 if (sort_loop == NULL)
1804 /* no later file, append to end of list */
1805 udev_list_entry_remove(sort_loop);
1806 udev_list_entry_append(sort_loop, &file_list);
1810 /* add all filenames to the string buffer */
1811 udev_list_entry_foreach(file_loop, udev_list_get_entry(&file_list)) {
1812 const char *filename = udev_list_entry_get_name(file_loop);
1813 unsigned int filename_off;
1815 filename_off = add_string(rules, filename);
1816 /* the offset in the rule is limited to unsigned short */
1817 if (filename_off < USHRT_MAX)
1818 udev_list_entry_set_flags(file_loop, filename_off);
1821 /* parse list of files */
1822 udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1823 const char *filename = udev_list_entry_get_name(file_loop);
1824 unsigned int filename_off = udev_list_entry_get_flags(file_loop);
1826 if (stat(filename, &statbuf) == 0 && statbuf.st_size > 0)
1827 parse_file(rules, filename, filename_off);
1829 err(udev, "can not read '%s'\n", filename);
1830 udev_list_entry_delete(file_loop);
1833 memset(&end_token, 0x00, sizeof(struct token));
1834 end_token.type = TK_END;
1835 add_token(rules, &end_token);
1837 /* shrink allocated token and string buffer */
1838 if (rules->token_cur < rules->token_max) {
1839 struct token *tokens;
1841 tokens = realloc(rules->tokens, rules->token_cur * sizeof(struct token));
1842 if (tokens != NULL || rules->token_cur == 0) {
1843 rules->tokens = tokens;
1844 rules->token_max = rules->token_cur;
1847 if (rules->buf_cur < rules->buf_max) {
1850 buf = realloc(rules->buf, rules->buf_cur);
1851 if (buf != NULL || rules->buf_cur == 0) {
1853 rules->buf_max = rules->buf_cur;
1856 info(udev, "rules use %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1857 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1858 info(udev, "temporary index used %zu bytes (%u * %zu bytes)\n",
1859 rules->trie_nodes_cur * sizeof(struct trie_node),
1860 rules->trie_nodes_cur, sizeof(struct trie_node));
1863 free(rules->trie_nodes);
1864 rules->trie_nodes = NULL;
1865 rules->trie_nodes_cur = 0;
1866 rules->trie_nodes_max = 0;
1868 /* cleanup uid/gid cache */
1871 rules->uids_cur = 0;
1872 rules->uids_max = 0;
1875 rules->gids_cur = 0;
1876 rules->gids_max = 0;
1882 void udev_rules_unref(struct udev_rules *rules)
1886 free(rules->tokens);
1888 free(rules->trie_nodes);
1894 static int match_key(struct udev_rules *rules, struct token *token, const char *val)
1896 char *key_value = &rules->buf[token->key.value_off];
1903 switch (token->key.glob) {
1905 match = (strcmp(key_value, val) == 0);
1908 match = (fnmatch(key_value, val, 0) == 0);
1915 split = &rules->buf[token->key.value_off];
1920 next = strchr(split, '|');
1922 size_t matchlen = (size_t)(next - split);
1924 match = (matchlen == len && strncmp(split, val, matchlen) == 0);
1928 match = (strcmp(split, val) == 0);
1937 char value[UTIL_PATH_SIZE];
1939 util_strscpy(value, sizeof(value), &rules->buf[token->key.value_off]);
1941 while (key_value != NULL) {
1942 pos = strchr(key_value, '|');
1947 dbg(rules->udev, "match %s '%s' <-> '%s'\n", token_str(token->type), key_value, val);
1948 match = (fnmatch(key_value, val, 0) == 0);
1956 match = (val[0] != '\0');
1962 if (match && (token->key.op == OP_MATCH)) {
1963 dbg(rules->udev, "%s is true (matching value)\n", token_str(token->type));
1966 if (!match && (token->key.op == OP_NOMATCH)) {
1967 dbg(rules->udev, "%s is true (non-matching value)\n", token_str(token->type));
1970 dbg(rules->udev, "%s is not true\n", token_str(token->type));
1974 static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur)
1977 char nbuf[UTIL_NAME_SIZE];
1979 char vbuf[UTIL_NAME_SIZE];
1982 name = &rules->buf[cur->key.attr_off];
1983 switch (cur->key.attrsubst) {
1985 udev_event_apply_format(event, name, nbuf, sizeof(nbuf));
1989 value = udev_device_get_sysattr_value(dev, name);
1994 if (util_resolve_subsys_kernel(event->udev, name, vbuf, sizeof(vbuf), 1) != 0)
2002 /* remove trailing whitespace, if not asked to match for it */
2003 len = strlen(value);
2004 if (len > 0 && isspace(value[len-1])) {
2005 const char *key_value;
2008 key_value = &rules->buf[cur->key.value_off];
2009 klen = strlen(key_value);
2010 if (klen > 0 && !isspace(key_value[klen-1])) {
2011 if (value != vbuf) {
2012 util_strscpy(vbuf, sizeof(vbuf), value);
2015 while (len > 0 && isspace(vbuf[--len]))
2017 dbg(rules->udev, "removed trailing whitespace from '%s'\n", value);
2021 return match_key(rules, cur, value);
2030 int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event)
2034 enum escape_type esc = ESCAPE_UNSET;
2037 if (rules->tokens == NULL)
2040 can_set_name = ((strcmp(udev_device_get_action(event->dev), "remove") != 0) &&
2041 (major(udev_device_get_devnum(event->dev)) > 0 ||
2042 strcmp(udev_device_get_subsystem(event->dev), "net") == 0));
2044 /* loop through token list, match, run actions or forward to next rule */
2045 cur = &rules->tokens[0];
2048 dump_token(rules, cur);
2049 switch (cur->type) {
2053 /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
2054 if (!can_set_name && rule->rule.flags)
2059 if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
2063 if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
2067 if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
2072 size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
2073 struct udev_list_entry *list_entry;
2076 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
2077 const char *devlink;
2079 devlink = &udev_list_entry_get_name(list_entry)[devlen];
2080 if (match_key(rules, cur, devlink) == 0) {
2090 if (match_key(rules, cur, event->name) != 0)
2095 const char *key_name = &rules->buf[cur->key.attr_off];
2098 value = udev_device_get_property_value(event->dev, key_name);
2099 if (value == NULL) {
2100 dbg(event->udev, "ENV{%s} is not set, treat as empty\n", key_name);
2103 if (match_key(rules, cur, value))
2107 case TK_M_SUBSYSTEM:
2108 if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
2112 if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
2117 char filename[UTIL_PATH_SIZE];
2120 udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename));
2121 found = (wait_for_file(event->dev, filename, 10) == 0);
2122 if (!found && (cur->key.op != OP_NOMATCH))
2127 if (match_attr(rules, event->dev, event, cur) != 0)
2131 case TK_M_SUBSYSTEMS:
2137 /* get whole sequence of parent matches */
2139 while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX)
2142 /* loop over parents */
2143 event->dev_parent = event->dev;
2147 dbg(event->udev, "parent: '%s'\n", udev_device_get_syspath(event->dev_parent));
2148 /* loop over sequence of parent match keys */
2149 for (key = cur; key < next; key++ ) {
2150 dump_token(rules, key);
2153 if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
2156 case TK_M_SUBSYSTEMS:
2157 if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
2161 if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
2165 if (match_attr(rules, event->dev_parent, event, key) != 0)
2171 dbg(event->udev, "parent key matched\n");
2173 dbg(event->udev, "all parent keys matched\n");
2174 /* all keys matched */
2178 event->dev_parent = udev_device_get_parent(event->dev_parent);
2179 if (event->dev_parent == NULL)
2182 /* move behind our sequence of parent match keys */
2188 char filename[UTIL_PATH_SIZE];
2189 struct stat statbuf;
2192 udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename));
2193 if (util_resolve_subsys_kernel(event->udev, filename, filename, sizeof(filename), 0) != 0) {
2194 if (filename[0] != '/') {
2195 char tmp[UTIL_PATH_SIZE];
2197 util_strscpy(tmp, sizeof(tmp), filename);
2198 util_strscpyl(filename, sizeof(filename),
2199 udev_device_get_syspath(event->dev), "/", tmp, NULL);
2202 attr_subst_subdir(filename, sizeof(filename));
2204 match = (stat(filename, &statbuf) == 0);
2205 dbg(event->udev, "'%s' %s", filename, match ? "exists\n" : "does not exist\n");
2206 if (match && cur->key.mode > 0) {
2207 match = ((statbuf.st_mode & cur->key.mode) > 0);
2208 dbg(event->udev, "'%s' has mode=%#o and %s %#o\n", filename, statbuf.st_mode,
2209 match ? "matches" : "does not match", cur->key.mode);
2211 if (match && cur->key.op == OP_NOMATCH)
2213 if (!match && cur->key.op == OP_MATCH)
2219 char program[UTIL_PATH_SIZE];
2221 char result[UTIL_PATH_SIZE];
2223 free(event->program_result);
2224 event->program_result = NULL;
2225 udev_event_apply_format(event, &rules->buf[cur->key.value_off], program, sizeof(program));
2226 envp = udev_device_get_properties_envp(event->dev);
2227 info(event->udev, "PROGRAM '%s' %s:%u\n",
2229 &rules->buf[rule->rule.filename_off],
2230 rule->rule.filename_line);
2231 if (util_run_program(event->udev, program, envp, result, sizeof(result), NULL, NULL) != 0) {
2232 if (cur->key.op != OP_NOMATCH)
2237 util_remove_trailing_chars(result, '\n');
2238 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2239 count = udev_util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
2241 info(event->udev, "%i character(s) replaced\n" , count);
2243 event->program_result = strdup(result);
2244 dbg(event->udev, "storing result '%s'\n", event->program_result);
2245 if (cur->key.op == OP_NOMATCH)
2250 case TK_M_IMPORT_FILE:
2252 char import[UTIL_PATH_SIZE];
2254 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2255 if (import_file_into_properties(event->dev, import) != 0)
2256 if (cur->key.op != OP_NOMATCH)
2260 case TK_M_IMPORT_PROG:
2262 char import[UTIL_PATH_SIZE];
2264 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2265 info(event->udev, "IMPORT '%s' %s:%u\n",
2267 &rules->buf[rule->rule.filename_off],
2268 rule->rule.filename_line);
2269 if (import_program_into_properties(event->dev, import) != 0)
2270 if (cur->key.op != OP_NOMATCH)
2274 case TK_M_IMPORT_DB:
2276 const char *key = &rules->buf[cur->key.value_off];
2279 value = udev_device_get_property_value(event->dev_db, key);
2280 if (value != NULL) {
2281 struct udev_list_entry *entry;
2283 entry = udev_device_add_property(event->dev, key, value);
2284 udev_list_entry_set_flags(entry, 1);
2286 if (cur->key.op != OP_NOMATCH)
2291 case TK_M_IMPORT_PARENT:
2293 char import[UTIL_PATH_SIZE];
2295 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2296 if (import_parent_into_properties(event->dev, import) != 0)
2297 if (cur->key.op != OP_NOMATCH)
2302 if (match_key(rules, cur, event->program_result) != 0)
2305 case TK_A_STRING_ESCAPE_NONE:
2308 case TK_A_STRING_ESCAPE_REPLACE:
2309 esc = ESCAPE_REPLACE;
2311 case TK_A_INOTIFY_WATCH:
2312 event->inotify_watch = cur->key.watch;
2314 case TK_A_DEVLINK_PRIO:
2315 udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
2319 char owner[UTIL_NAME_SIZE];
2321 if (event->owner_final)
2323 if (cur->key.op == OP_ASSIGN_FINAL)
2324 event->owner_final = 1;
2325 udev_event_apply_format(event, &rules->buf[cur->key.value_off], owner, sizeof(owner));
2326 event->uid = util_lookup_user(event->udev, owner);
2327 info(event->udev, "OWNER %u %s:%u\n",
2329 &rules->buf[rule->rule.filename_off],
2330 rule->rule.filename_line);
2335 char group[UTIL_NAME_SIZE];
2337 if (event->group_final)
2339 if (cur->key.op == OP_ASSIGN_FINAL)
2340 event->group_final = 1;
2341 udev_event_apply_format(event, &rules->buf[cur->key.value_off], group, sizeof(group));
2342 event->gid = util_lookup_group(event->udev, group);
2343 info(event->udev, "GROUP %u %s:%u\n",
2345 &rules->buf[rule->rule.filename_off],
2346 rule->rule.filename_line);
2351 char mode[UTIL_NAME_SIZE];
2354 if (event->mode_final)
2356 if (cur->key.op == OP_ASSIGN_FINAL)
2357 event->mode_final = 1;
2358 udev_event_apply_format(event, &rules->buf[cur->key.value_off], mode, sizeof(mode));
2359 event->mode = strtol(mode, &endptr, 8);
2360 if (endptr[0] != '\0') {
2361 err(event->udev, "invalide mode '%s' set default mode 0660\n", mode);
2364 info(event->udev, "MODE %#o %s:%u\n",
2366 &rules->buf[rule->rule.filename_off],
2367 rule->rule.filename_line);
2371 if (event->owner_final)
2373 if (cur->key.op == OP_ASSIGN_FINAL)
2374 event->owner_final = 1;
2375 event->uid = cur->key.uid;
2376 info(event->udev, "OWNER %u %s:%u\n",
2378 &rules->buf[rule->rule.filename_off],
2379 rule->rule.filename_line);
2382 if (event->group_final)
2384 if (cur->key.op == OP_ASSIGN_FINAL)
2385 event->group_final = 1;
2386 event->gid = cur->key.gid;
2387 info(event->udev, "GROUP %u %s:%u\n",
2389 &rules->buf[rule->rule.filename_off],
2390 rule->rule.filename_line);
2393 if (event->mode_final)
2395 if (cur->key.op == OP_ASSIGN_FINAL)
2396 event->mode_final = 1;
2397 event->mode = cur->key.mode;
2398 info(event->udev, "MODE %#o %s:%u\n",
2400 &rules->buf[rule->rule.filename_off],
2401 rule->rule.filename_line);
2405 const char *name = &rules->buf[cur->key.attr_off];
2406 char *value = &rules->buf[cur->key.value_off];
2408 if (value[0] != '\0') {
2409 char temp_value[UTIL_NAME_SIZE];
2410 struct udev_list_entry *entry;
2412 udev_event_apply_format(event, value, temp_value, sizeof(temp_value));
2413 entry = udev_device_add_property(event->dev, name, temp_value);
2414 /* store in db, skip private keys */
2416 udev_list_entry_set_flags(entry, 1);
2418 udev_device_add_property(event->dev, name, NULL);
2423 udev_device_add_tag(event->dev, &rules->buf[cur->key.value_off]);
2427 const char *name = &rules->buf[cur->key.value_off];
2428 char name_str[UTIL_PATH_SIZE];
2431 if (event->name_final)
2433 if (cur->key.op == OP_ASSIGN_FINAL)
2434 event->name_final = 1;
2435 udev_event_apply_format(event, name, name_str, sizeof(name_str));
2436 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2437 count = udev_util_replace_chars(name_str, "/");
2439 info(event->udev, "%i character(s) replaced\n", count);
2442 event->name = strdup(name_str);
2443 info(event->udev, "NAME '%s' %s:%u\n",
2445 &rules->buf[rule->rule.filename_off],
2446 rule->rule.filename_line);
2451 char temp[UTIL_PATH_SIZE];
2452 char filename[UTIL_PATH_SIZE];
2456 if (event->devlink_final)
2458 if (major(udev_device_get_devnum(event->dev)) == 0)
2460 if (cur->key.op == OP_ASSIGN_FINAL)
2461 event->devlink_final = 1;
2462 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2463 udev_device_cleanup_devlinks_list(event->dev);
2465 /* allow multiple symlinks separated by spaces */
2466 udev_event_apply_format(event, &rules->buf[cur->key.value_off], temp, sizeof(temp));
2467 if (esc == ESCAPE_UNSET)
2468 count = udev_util_replace_chars(temp, "/ ");
2469 else if (esc == ESCAPE_REPLACE)
2470 count = udev_util_replace_chars(temp, "/");
2472 info(event->udev, "%i character(s) replaced\n" , count);
2473 dbg(event->udev, "rule applied, added symlink(s) '%s'\n", temp);
2475 while (isspace(pos[0]))
2477 next = strchr(pos, ' ');
2478 while (next != NULL) {
2480 info(event->udev, "LINK '%s' %s:%u\n", pos,
2481 &rules->buf[rule->rule.filename_off], rule->rule.filename_line);
2482 util_strscpyl(filename, sizeof(filename), udev_get_dev_path(event->udev), "/", pos, NULL);
2483 udev_device_add_devlink(event->dev, filename, cur->key.devlink_unique);
2484 while (isspace(next[1]))
2487 next = strchr(pos, ' ');
2489 if (pos[0] != '\0') {
2490 info(event->udev, "LINK '%s' %s:%u\n", pos,
2491 &rules->buf[rule->rule.filename_off], rule->rule.filename_line);
2492 util_strscpyl(filename, sizeof(filename), udev_get_dev_path(event->udev), "/", pos, NULL);
2493 udev_device_add_devlink(event->dev, filename, cur->key.devlink_unique);
2497 case TK_A_EVENT_TIMEOUT:
2498 udev_device_set_event_timeout(event->dev, cur->key.event_timeout);
2502 const char *key_name = &rules->buf[cur->key.attr_off];
2503 char attr[UTIL_PATH_SIZE];
2504 char value[UTIL_NAME_SIZE];
2507 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0)
2508 util_strscpyl(attr, sizeof(attr), udev_device_get_syspath(event->dev), "/", key_name, NULL);
2509 attr_subst_subdir(attr, sizeof(attr));
2511 udev_event_apply_format(event, &rules->buf[cur->key.value_off], value, sizeof(value));
2512 info(event->udev, "ATTR '%s' writing '%s' %s:%u\n", attr, value,
2513 &rules->buf[rule->rule.filename_off],
2514 rule->rule.filename_line);
2515 f = fopen(attr, "w");
2517 if (fprintf(f, "%s", value) <= 0)
2518 err(event->udev, "error writing ATTR{%s}: %m\n", attr);
2521 err(event->udev, "error opening ATTR{%s} for writing: %m\n", attr);
2527 struct udev_list_entry *list_entry;
2529 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2530 udev_list_cleanup_entries(event->udev, &event->run_list);
2531 info(event->udev, "RUN '%s' %s:%u\n",
2532 &rules->buf[cur->key.value_off],
2533 &rules->buf[rule->rule.filename_off],
2534 rule->rule.filename_line);
2535 list_entry = udev_list_entry_add(event->udev, &event->run_list,
2536 &rules->buf[cur->key.value_off], NULL, 1, 0);
2537 if (cur->key.fail_on_error)
2538 udev_list_entry_set_flags(list_entry, 1);
2542 if (cur->key.rule_goto == 0)
2544 cur = &rules->tokens[cur->key.rule_goto];
2549 case TK_M_PARENTS_MIN:
2550 case TK_M_PARENTS_MAX:
2553 err(rules->udev, "wrong type %u\n", cur->type);
2560 /* fast-forward to next rule */
2561 cur = rule + rule->rule.token_count;
2562 dbg(rules->udev, "forward to rule: %u\n",
2563 (unsigned int) (cur - rules->tokens));