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;
195 unsigned int rule_goto;
210 struct udev_rules *rules;
212 struct token token[MAX_TK];
213 unsigned int token_cur;
217 static const char *operation_str(enum operation_type type)
219 static const char *operation_strs[] = {
220 [OP_UNSET] = "UNSET",
221 [OP_MATCH] = "match",
222 [OP_NOMATCH] = "nomatch",
223 [OP_MATCH_MAX] = "MATCH_MAX",
226 [OP_ASSIGN] = "assign",
227 [OP_ASSIGN_FINAL] = "assign-final",
230 return operation_strs[type];
233 static const char *string_glob_str(enum string_glob_type type)
235 static const char *string_glob_strs[] = {
236 [GL_UNSET] = "UNSET",
237 [GL_PLAIN] = "plain",
239 [GL_SPLIT] = "split",
240 [GL_SPLIT_GLOB] = "split-glob",
241 [GL_SOMETHING] = "split-glob",
244 return string_glob_strs[type];
247 static const char *token_str(enum token_type type)
249 static const char *token_strs[] = {
250 [TK_UNSET] = "UNSET",
253 [TK_M_ACTION] = "M ACTION",
254 [TK_M_DEVPATH] = "M DEVPATH",
255 [TK_M_KERNEL] = "M KERNEL",
256 [TK_M_DEVLINK] = "M DEVLINK",
257 [TK_M_NAME] = "M NAME",
258 [TK_M_ENV] = "M ENV",
259 [TK_M_SUBSYSTEM] = "M SUBSYSTEM",
260 [TK_M_DRIVER] = "M DRIVER",
261 [TK_M_WAITFOR] = "M WAITFOR",
262 [TK_M_ATTR] = "M ATTR",
264 [TK_M_PARENTS_MIN] = "M PARENTS_MIN",
265 [TK_M_KERNELS] = "M KERNELS",
266 [TK_M_SUBSYSTEMS] = "M SUBSYSTEMS",
267 [TK_M_DRIVERS] = "M DRIVERS",
268 [TK_M_ATTRS] = "M ATTRS",
269 [TK_M_PARENTS_MAX] = "M PARENTS_MAX",
271 [TK_M_TEST] = "M TEST",
272 [TK_M_PROGRAM] = "M PROGRAM",
273 [TK_M_IMPORT_FILE] = "M IMPORT_FILE",
274 [TK_M_IMPORT_PROG] = "M IMPORT_PROG",
275 [TK_M_IMPORT_PARENT] = "M IMPORT_PARENT",
276 [TK_M_RESULT] = "M RESULT",
277 [TK_M_MAX] = "M MAX",
279 [TK_A_IGNORE_DEVICE] = "A IGNORE_DEVICE",
280 [TK_A_STRING_ESCAPE_NONE] = "A STRING_ESCAPE_NONE",
281 [TK_A_STRING_ESCAPE_REPLACE] = "A STRING_ESCAPE_REPLACE",
282 [TK_A_INOTIFY_WATCH] = "A INOTIFY_WATCH",
283 [TK_A_NUM_FAKE_PART] = "A NUM_FAKE_PART",
284 [TK_A_DEVLINK_PRIO] = "A DEVLINK_PRIO",
285 [TK_A_OWNER] = "A OWNER",
286 [TK_A_GROUP] = "A GROUP",
287 [TK_A_MODE] = "A MODE",
288 [TK_A_OWNER_ID] = "A OWNER_ID",
289 [TK_A_GROUP_ID] = "A GROUP_ID",
290 [TK_A_MODE_ID] = "A MODE_ID",
291 [TK_A_ENV] = "A ENV",
292 [TK_A_NAME] = "A NAME",
293 [TK_A_DEVLINK] = "A DEVLINK",
294 [TK_A_EVENT_TIMEOUT] = "A EVENT_TIMEOUT",
295 [TK_A_IGNORE_REMOVE] = "A IGNORE_REMOVE",
296 [TK_A_ATTR] = "A ATTR",
297 [TK_A_RUN] = "A RUN",
298 [TK_A_GOTO] = "A GOTO",
299 [TK_A_LAST_RULE] = "A LAST_RULE",
304 return token_strs[type];
307 static void dump_token(struct udev_rules *rules, struct token *token)
309 enum token_type type = token->type;
310 enum operation_type op = token->key.op;
311 enum string_glob_type glob = token->key.glob;
312 const char *value = &rules->buf[token->key.value_off];
313 const char *attr = &rules->buf[token->key.attr_off];
318 const char *tks_ptr = (char *)rules->tokens;
319 const char *tk_ptr = (char *)token;
320 unsigned int idx = (tk_ptr - tks_ptr) / sizeof(struct token);
322 dbg(rules->udev, "* RULE %s:%u, token: %u, count: %u, label: '%s', flags: 0x%02x\n",
323 &rules->buf[token->rule.filename_off], token->rule.filename_line,
324 idx, token->rule.token_count,
325 &rules->buf[token->rule.label_off],
338 case TK_M_SUBSYSTEMS:
341 case TK_M_IMPORT_FILE:
342 case TK_M_IMPORT_PROG:
343 case TK_M_IMPORT_PARENT:
351 dbg(rules->udev, "%s %s '%s'(%s)\n",
352 token_str(type), operation_str(op), value, string_glob_str(glob));
359 dbg(rules->udev, "%s %s '%s' '%s'(%s)\n",
360 token_str(type), operation_str(op), attr, value, string_glob_str(glob));
362 case TK_A_IGNORE_DEVICE:
363 case TK_A_STRING_ESCAPE_NONE:
364 case TK_A_STRING_ESCAPE_REPLACE:
366 case TK_A_IGNORE_REMOVE:
367 dbg(rules->udev, "%s\n", token_str(type));
370 dbg(rules->udev, "%s %s '%s'(%s) %#o\n",
371 token_str(type), operation_str(op), value, string_glob_str(glob), token->key.mode);
373 case TK_A_INOTIFY_WATCH:
374 dbg(rules->udev, "%s %u\n", token_str(type), token->key.watch);
376 case TK_A_NUM_FAKE_PART:
377 dbg(rules->udev, "%s %u\n", token_str(type), token->key.num_fake_part);
379 case TK_A_DEVLINK_PRIO:
380 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.devlink_prio);
383 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.uid);
386 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.gid);
389 dbg(rules->udev, "%s %s %#o\n", token_str(type), operation_str(op), token->key.mode);
391 case TK_A_EVENT_TIMEOUT:
392 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.event_timeout);
395 dbg(rules->udev, "%s '%s' %u\n", token_str(type), value, token->key.rule_goto);
398 dbg(rules->udev, "* %s\n", token_str(type));
400 case TK_M_PARENTS_MIN:
401 case TK_M_PARENTS_MAX:
404 dbg(rules->udev, "unknown type %u\n", type);
409 static void dump_rules(struct udev_rules *rules)
413 dbg(rules->udev, "dumping %u (%zu bytes) tokens, %u (%zu bytes) strings\n",
415 rules->token_cur * sizeof(struct token),
418 for(i = 0; i < rules->token_cur; i++)
419 dump_token(rules, &rules->tokens[i]);
422 static inline const char *operation_str(enum operation_type type) { return NULL; }
423 static inline const char *token_str(enum token_type type) { return NULL; }
424 static inline void dump_token(struct udev_rules *rules, struct token *token) {}
425 static inline void dump_rules(struct udev_rules *rules) {}
426 #endif /* ENABLE_DEBUG */
428 static int add_new_string(struct udev_rules *rules, const char *str, size_t bytes)
432 /* grow buffer if needed */
433 if (rules->buf_cur + bytes+1 >= rules->buf_max) {
437 /* double the buffer size */
438 add = rules->buf_max;
442 buf = realloc(rules->buf, rules->buf_max + add);
445 dbg(rules->udev, "extend buffer from %zu to %zu\n", rules->buf_max, rules->buf_max + add);
447 rules->buf_max += add;
449 off = rules->buf_cur;
450 memcpy(&rules->buf[rules->buf_cur], str, bytes);
451 rules->buf_cur += bytes;
456 static int add_string(struct udev_rules *rules, const char *str)
458 unsigned int node_idx;
459 struct trie_node *new_node;
460 unsigned int new_node_idx;
465 struct trie_node *parent;
467 /* walk trie, start from last character of str to find matching tails */
471 for (depth = 0; depth <= len; depth++) {
472 struct trie_node *node;
473 unsigned int child_idx;
475 node = &rules->trie_nodes[node_idx];
476 off = node->value_off + node->value_len - len;
478 /* match against current node */
479 if (depth == len || (node->value_len >= len && memcmp(&rules->buf[off], str, len) == 0))
482 /* lookup child node */
483 key = str[len - 1 - depth];
484 child_idx = node->child_idx;
485 while (child_idx > 0) {
486 struct trie_node *child;
488 child = &rules->trie_nodes[child_idx];
489 if (child->key == key)
491 child_idx = child->next_child_idx;
495 node_idx = child_idx;
498 /* string not found, add it */
499 off = add_new_string(rules, str, len + 1);
501 /* grow trie nodes if needed */
502 if (rules->trie_nodes_cur >= rules->trie_nodes_max) {
503 struct trie_node *nodes;
506 /* double the buffer size */
507 add = rules->trie_nodes_max;
511 nodes = realloc(rules->trie_nodes, (rules->trie_nodes_max + add) * sizeof(struct trie_node));
514 dbg(rules->udev, "extend trie nodes from %u to %u\n",
515 rules->trie_nodes_max, rules->trie_nodes_max + add);
516 rules->trie_nodes = nodes;
517 rules->trie_nodes_max += add;
521 new_node_idx = rules->trie_nodes_cur;
522 rules->trie_nodes_cur++;
523 new_node = &rules->trie_nodes[new_node_idx];
524 memset(new_node, 0x00, sizeof(struct trie_node));
525 new_node->value_off = off;
526 new_node->value_len = len;
529 /* join the parent's child list */
530 parent = &rules->trie_nodes[node_idx];
531 if (parent->child_idx == 0) {
532 parent->child_idx = new_node_idx;
534 struct trie_node *last_child;
536 last_child = &rules->trie_nodes[parent->last_child_idx];
537 last_child->next_child_idx = new_node_idx;
539 parent->last_child_idx = new_node_idx;
543 static int add_token(struct udev_rules *rules, struct token *token)
545 /* grow buffer if needed */
546 if (rules->token_cur+1 >= rules->token_max) {
547 struct token *tokens;
550 /* double the buffer size */
551 add = rules->token_max;
555 tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
558 dbg(rules->udev, "extend tokens from %u to %u\n", rules->token_max, rules->token_max + add);
559 rules->tokens = tokens;
560 rules->token_max += add;
562 memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
567 static uid_t add_uid(struct udev_rules *rules, const char *owner)
573 /* lookup, if we know it already */
574 for (i = 0; i < rules->uids_cur; i++) {
575 off = rules->uids[i].name_off;
576 if (strcmp(&rules->buf[off], owner) == 0) {
577 uid = rules->uids[i].uid;
578 dbg(rules->udev, "return existing %u for '%s'\n", uid, owner);
582 uid = util_lookup_user(rules->udev, owner);
584 /* grow buffer if needed */
585 if (rules->uids_cur+1 >= rules->uids_max) {
586 struct uid_gid *uids;
589 /* double the buffer size */
590 add = rules->uids_max;
594 uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
597 dbg(rules->udev, "extend uids from %u to %u\n", rules->uids_max, rules->uids_max + add);
599 rules->uids_max += add;
601 rules->uids[rules->uids_cur].uid = uid;
602 off = add_string(rules, owner);
605 rules->uids[rules->uids_cur].name_off = off;
610 static gid_t add_gid(struct udev_rules *rules, const char *group)
616 /* lookup, if we know it already */
617 for (i = 0; i < rules->gids_cur; i++) {
618 off = rules->gids[i].name_off;
619 if (strcmp(&rules->buf[off], group) == 0) {
620 gid = rules->gids[i].gid;
621 dbg(rules->udev, "return existing %u for '%s'\n", gid, group);
625 gid = util_lookup_group(rules->udev, group);
627 /* grow buffer if needed */
628 if (rules->gids_cur+1 >= rules->gids_max) {
629 struct uid_gid *gids;
632 /* double the buffer size */
633 add = rules->gids_max;
637 gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid));
640 dbg(rules->udev, "extend gids from %u to %u\n", rules->gids_max, rules->gids_max + add);
642 rules->gids_max += add;
644 rules->gids[rules->gids_cur].gid = gid;
645 off = add_string(rules, group);
648 rules->gids[rules->gids_cur].name_off = off;
653 static int import_property_from_string(struct udev_device *dev, char *line)
655 struct udev *udev = udev_device_get_udev(dev);
662 while (isspace(key[0]))
665 /* comment or empty line */
666 if (key[0] == '#' || key[0] == '\0')
669 /* split key/value */
670 val = strchr(key, '=');
677 while (isspace(val[0]))
684 while (isspace(key[len-1]))
688 /* terminate value */
692 while (isspace(val[len-1]))
700 if (val[0] == '"' || val[0] == '\'') {
701 if (val[len-1] != val[0]) {
702 info(udev, "inconsistent quoting: '%s', skip\n", line);
709 dbg(udev, "adding '%s'='%s'\n", key, val);
711 /* handle device, renamed by external tool, returning new path */
712 if (strcmp(key, "DEVPATH") == 0) {
713 char syspath[UTIL_PATH_SIZE];
715 info(udev, "updating devpath from '%s' to '%s'\n",
716 udev_device_get_devpath(dev), val);
717 util_strscpyl(syspath, sizeof(syspath), udev_get_sys_path(udev), val, NULL);
718 udev_device_set_syspath(dev, syspath);
720 struct udev_list_entry *entry;
722 entry = udev_device_add_property(dev, key, val);
723 /* store in db, skip private keys */
725 udev_list_entry_set_flag(entry, 1);
730 static int import_file_into_properties(struct udev_device *dev, const char *filename)
733 char line[UTIL_LINE_SIZE];
735 f = fopen(filename, "r");
738 while (fgets(line, sizeof(line), f) != NULL)
739 import_property_from_string(dev, line);
744 static int import_program_into_properties(struct udev_device *dev, const char *program)
746 struct udev *udev = udev_device_get_udev(dev);
752 envp = udev_device_get_properties_envp(dev);
753 if (util_run_program(udev, program, envp, result, sizeof(result), &reslen, NULL) != 0)
757 while (line != NULL) {
760 pos = strchr(line, '\n');
765 import_property_from_string(dev, line);
771 static int import_parent_into_properties(struct udev_device *dev, const char *filter)
773 struct udev *udev = udev_device_get_udev(dev);
774 struct udev_device *dev_parent;
775 struct udev_list_entry *list_entry;
777 dev_parent = udev_device_get_parent(dev);
778 if (dev_parent == NULL)
781 dbg(udev, "found parent '%s', get the node name\n", udev_device_get_syspath(dev_parent));
782 udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
783 const char *key = udev_list_entry_get_name(list_entry);
784 const char *val = udev_list_entry_get_value(list_entry);
786 if (fnmatch(filter, key, 0) == 0) {
787 struct udev_list_entry *entry;
789 dbg(udev, "import key '%s=%s'\n", key, val);
790 entry = udev_device_add_property(dev, key, val);
791 /* store in db, skip private keys */
793 udev_list_entry_set_flag(entry, 1);
799 #define WAIT_LOOP_PER_SECOND 50
800 static int wait_for_file(struct udev_device *dev, const char *file, int timeout)
802 struct udev *udev = udev_device_get_udev(dev);
803 char filepath[UTIL_PATH_SIZE];
804 char devicepath[UTIL_PATH_SIZE];
806 int loop = timeout * WAIT_LOOP_PER_SECOND;
808 /* a relative path is a device attribute */
809 devicepath[0] = '\0';
810 if (file[0] != '/') {
811 util_strscpyl(devicepath, sizeof(devicepath),
812 udev_get_sys_path(udev), udev_device_get_devpath(dev), NULL);
813 util_strscpyl(filepath, sizeof(filepath), devicepath, "/", file, NULL);
817 dbg(udev, "will wait %i sec for '%s'\n", timeout, file);
819 const struct timespec duration = { 0, 1000 * 1000 * 1000 / WAIT_LOOP_PER_SECOND };
822 if (stat(file, &stats) == 0) {
823 info(udev, "file '%s' appeared after %i loops\n", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
826 /* make sure, the device did not disappear in the meantime */
827 if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
828 info(udev, "device disappeared while waiting for '%s'\n", file);
831 info(udev, "wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND);
832 nanosleep(&duration, NULL);
834 info(udev, "waiting for '%s' failed\n", file);
838 static int attr_subst_subdir(char *attr, size_t len)
842 if (strstr(attr, "/*/")) {
844 char dirname[UTIL_PATH_SIZE];
848 util_strscpy(dirname, sizeof(dirname), attr);
849 pos = strstr(dirname, "/*/");
854 dir = opendir(dirname);
858 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
861 if (dent->d_name[0] == '.')
863 util_strscpyl(attr, len, dirname, "/", dent->d_name, tail, NULL);
864 if (stat(attr, &stats) == 0) {
876 static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value)
882 if (linepos == NULL || linepos[0] == '\0')
885 /* skip whitespace */
886 while (isspace(linepos[0]) || linepos[0] == ',')
890 if (linepos[0] == '\0')
896 if (linepos[0] == '\0')
898 if (isspace(linepos[0]))
900 if (linepos[0] == '=')
902 if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
903 if (linepos[1] == '=')
907 /* remember end of key */
910 /* skip whitespace after key */
911 while (isspace(linepos[0]))
913 if (linepos[0] == '\0')
916 /* get operation type */
917 if (linepos[0] == '=' && linepos[1] == '=') {
920 } else if (linepos[0] == '!' && linepos[1] == '=') {
923 } else if (linepos[0] == '+' && linepos[1] == '=') {
926 } else if (linepos[0] == '=') {
929 } else if (linepos[0] == ':' && linepos[1] == '=') {
930 *op = OP_ASSIGN_FINAL;
938 /* skip whitespace after operator */
939 while (isspace(linepos[0]))
941 if (linepos[0] == '\0')
945 if (linepos[0] == '"')
952 temp = strchr(linepos, '"');
957 dbg(udev, "%s '%s'-'%s'\n", operation_str(*op), *key, *value);
959 /* move line to next key */
964 /* extract possible KEY{attr} */
965 static char *get_key_attribute(struct udev *udev, char *str)
970 attr = strchr(str, '{');
973 pos = strchr(attr, '}');
975 err(udev, "missing closing brace for format\n");
979 dbg(udev, "attribute='%s'\n", attr);
985 static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
986 enum operation_type op,
987 const char *value, const void *data)
989 struct token *token = &rule_tmp->token[rule_tmp->token_cur];
990 const char *attr = NULL;
992 memset(token, 0x00, sizeof(struct token));
1004 case TK_M_SUBSYSTEMS:
1007 case TK_M_IMPORT_FILE:
1008 case TK_M_IMPORT_PROG:
1009 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);
1029 token->key.devlink_unique = *(int *)data;
1032 token->key.value_off = add_string(rule_tmp->rules, value);
1034 token->key.mode = *(mode_t *)data;
1036 case TK_A_IGNORE_DEVICE:
1037 case TK_A_STRING_ESCAPE_NONE:
1038 case TK_A_STRING_ESCAPE_REPLACE:
1039 case TK_A_IGNORE_REMOVE:
1040 case TK_A_LAST_RULE:
1043 token->key.value_off = add_string(rule_tmp->rules, value);
1044 token->key.fail_on_error = *(int *)data;
1046 case TK_A_INOTIFY_WATCH:
1047 case TK_A_NUM_FAKE_PART:
1048 case TK_A_DEVLINK_PRIO:
1049 token->key.devlink_prio = *(int *)data;
1052 token->key.uid = *(uid_t *)data;
1055 token->key.gid = *(gid_t *)data;
1058 token->key.mode = *(mode_t *)data;
1060 case TK_A_EVENT_TIMEOUT:
1061 token->key.event_timeout = *(int *)data;
1064 case TK_M_PARENTS_MIN:
1065 case TK_M_PARENTS_MAX:
1069 err(rule_tmp->rules->udev, "wrong type %u\n", type);
1073 if (value != NULL && type < TK_M_MAX) {
1074 /* check if we need to split or call fnmatch() while matching rules */
1075 enum string_glob_type glob;
1079 has_split = (strchr(value, '|') != NULL);
1080 has_glob = (strchr(value, '*') != NULL || strchr(value, '?') != NULL || strchr(value, '[') != NULL);
1081 if (has_split && has_glob) {
1082 glob = GL_SPLIT_GLOB;
1083 } else if (has_split) {
1085 } else if (has_glob) {
1086 if (strcmp(value, "?*") == 0)
1087 glob = GL_SOMETHING;
1093 token->key.glob = glob;
1096 if (value != NULL && type > TK_M_MAX) {
1097 /* check if assigned value has substitution chars */
1098 if (value[0] == '[')
1099 token->key.subst = SB_SUBSYS;
1100 else if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
1101 token->key.subst = SB_FORMAT;
1103 token->key.subst = SB_NONE;
1107 /* check if property/attribut name has substitution chars */
1109 token->key.attrsubst = SB_SUBSYS;
1110 else if (strchr(attr, '%') != NULL || strchr(attr, '$') != NULL)
1111 token->key.attrsubst = SB_FORMAT;
1113 token->key.attrsubst = SB_NONE;
1116 token->key.type = type;
1118 rule_tmp->token_cur++;
1119 if (rule_tmp->token_cur >= ARRAY_SIZE(rule_tmp->token)) {
1120 err(rule_tmp->rules->udev, "temporary rule array too small\n");
1126 static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp)
1129 unsigned int start = 0;
1130 unsigned int end = rule_tmp->token_cur;
1132 for (i = 0; i < rule_tmp->token_cur; i++) {
1133 enum token_type next_val = TK_UNSET;
1134 unsigned int next_idx = 0;
1137 /* find smallest value */
1138 for (j = start; j < end; j++) {
1139 if (rule_tmp->token[j].type == TK_UNSET)
1141 if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
1142 next_val = rule_tmp->token[j].type;
1147 /* add token and mark done */
1148 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
1150 rule_tmp->token[next_idx].type = TK_UNSET;
1153 if (next_idx == start)
1155 if (next_idx+1 == end)
1161 static int add_rule(struct udev_rules *rules, char *line,
1162 const char *filename, unsigned int filename_off, unsigned int lineno)
1166 struct rule_tmp rule_tmp;
1168 memset(&rule_tmp, 0x00, sizeof(struct rule_tmp));
1169 rule_tmp.rules = rules;
1170 rule_tmp.rule.type = TK_RULE;
1171 rule_tmp.rule.rule.filename_off = filename_off;
1172 rule_tmp.rule.rule.filename_line = lineno;
1178 enum operation_type op;
1180 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0)
1183 if (strcmp(key, "ACTION") == 0) {
1184 if (op > OP_MATCH_MAX) {
1185 err(rules->udev, "invalid ACTION operation\n");
1188 rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL);
1192 if (strcmp(key, "DEVPATH") == 0) {
1193 if (op > OP_MATCH_MAX) {
1194 err(rules->udev, "invalid DEVPATH operation\n");
1197 rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
1201 if (strcmp(key, "KERNEL") == 0) {
1202 if (op > OP_MATCH_MAX) {
1203 err(rules->udev, "invalid KERNEL operation\n");
1206 rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL);
1210 if (strcmp(key, "SUBSYSTEM") == 0) {
1211 if (op > OP_MATCH_MAX) {
1212 err(rules->udev, "invalid SUBSYSTEM operation\n");
1215 /* bus, class, subsystem events should all be the same */
1216 if (strcmp(value, "subsystem") == 0 ||
1217 strcmp(value, "bus") == 0 ||
1218 strcmp(value, "class") == 0) {
1219 if (strcmp(value, "bus") == 0 || strcmp(value, "class") == 0)
1220 err(rules->udev, "'%s' must be specified as 'subsystem' \n"
1221 "please fix it in %s:%u", value, filename, lineno);
1222 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
1224 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
1228 if (strcmp(key, "DRIVER") == 0) {
1229 if (op > OP_MATCH_MAX) {
1230 err(rules->udev, "invalid DRIVER operation\n");
1233 rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL);
1237 if (strncmp(key, "ATTR{", sizeof("ATTR{")-1) == 0) {
1238 attr = get_key_attribute(rules->udev, key + sizeof("ATTR")-1);
1240 err(rules->udev, "error parsing ATTR attribute\n");
1243 if (op < OP_MATCH_MAX) {
1244 rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
1246 rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr);
1251 if (strcmp(key, "KERNELS") == 0 ||
1252 strcmp(key, "ID") == 0) {
1253 if (op > OP_MATCH_MAX) {
1254 err(rules->udev, "invalid KERNELS operation\n");
1257 rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1261 if (strcmp(key, "SUBSYSTEMS") == 0 ||
1262 strcmp(key, "BUS") == 0) {
1263 if (op > OP_MATCH_MAX) {
1264 err(rules->udev, "invalid SUBSYSTEMS operation\n");
1267 rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1271 if (strcmp(key, "DRIVERS") == 0) {
1272 if (op > OP_MATCH_MAX) {
1273 err(rules->udev, "invalid DRIVERS operation\n");
1276 rule_add_key(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
1280 if (strncmp(key, "ATTRS{", sizeof("ATTRS{")-1) == 0 ||
1281 strncmp(key, "SYSFS{", sizeof("SYSFS{")-1) == 0) {
1282 if (op > OP_MATCH_MAX) {
1283 err(rules->udev, "invalid ATTRS operation\n");
1286 attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
1288 err(rules->udev, "error parsing ATTRS attribute\n");
1291 if (strncmp(attr, "device/", 7) == 0)
1292 err(rules->udev, "the 'device' link may not be available in a future kernel, "
1293 "please fix it in %s:%u", filename, lineno);
1294 else if (strstr(attr, "../") != NULL)
1295 err(rules->udev, "do not reference parent sysfs directories directly, "
1296 "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
1297 rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1301 if (strncmp(key, "ENV{", sizeof("ENV{")-1) == 0) {
1302 attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1);
1304 err(rules->udev, "error parsing ENV attribute\n");
1307 if (op < OP_MATCH_MAX) {
1308 if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
1311 if (rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
1317 if (strcmp(key, "PROGRAM") == 0) {
1318 rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
1322 if (strcmp(key, "RESULT") == 0) {
1323 if (op > OP_MATCH_MAX) {
1324 err(rules->udev, "invalid RESULT operation\n");
1327 rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL);
1331 if (strncmp(key, "IMPORT", sizeof("IMPORT")-1) == 0) {
1332 attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1);
1333 if (attr != NULL && strstr(attr, "program")) {
1334 dbg(rules->udev, "IMPORT will be executed\n");
1335 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1336 } else if (attr != NULL && strstr(attr, "file")) {
1337 dbg(rules->udev, "IMPORT will be included as file\n");
1338 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1339 } else if (attr != NULL && strstr(attr, "parent")) {
1340 dbg(rules->udev, "IMPORT will include the parent values\n");
1341 rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
1343 /* figure it out if it is executable */
1344 char file[UTIL_PATH_SIZE];
1346 struct stat statbuf;
1348 /* allow programs in /lib/udev called without the path */
1349 if (value[0] != '/')
1350 util_strscpyl(file, sizeof(file), LIBEXECDIR "/", value, NULL);
1352 util_strscpy(file, sizeof(file), value);
1353 pos = strchr(file, ' ');
1356 dbg(rules->udev, "IMPORT auto mode for '%s'\n", file);
1357 if (stat(file, &statbuf) == 0 && (statbuf.st_mode & S_IXUSR)) {
1358 dbg(rules->udev, "IMPORT will be executed (autotype)\n");
1359 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1361 dbg(rules->udev, "IMPORT will be included as file (autotype)\n");
1362 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1368 if (strncmp(key, "TEST", sizeof("TEST")-1) == 0) {
1371 if (op > OP_MATCH_MAX) {
1372 err(rules->udev, "invalid TEST operation\n");
1375 attr = get_key_attribute(rules->udev, key + sizeof("TEST")-1);
1377 mode = strtol(attr, NULL, 8);
1378 rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode);
1380 rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL);
1385 if (strncmp(key, "RUN", sizeof("RUN")-1) == 0) {
1388 attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1);
1389 if (attr != NULL && strstr(attr, "fail_event_on_error"))
1391 rule_add_key(&rule_tmp, TK_A_RUN, op, value, &flag);
1395 if (strcmp(key, "WAIT_FOR") == 0 || strcmp(key, "WAIT_FOR_SYSFS") == 0) {
1396 rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1400 if (strcmp(key, "LABEL") == 0) {
1401 rule_tmp.rule.rule.label_off = add_string(rules, value);
1405 if (strcmp(key, "GOTO") == 0) {
1406 rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1410 if (strncmp(key, "NAME", sizeof("NAME")-1) == 0) {
1411 if (op < OP_MATCH_MAX) {
1412 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
1414 if (value[0] == '\0')
1415 info(rules->udev, "name empty, node creation suppressed\n");
1416 else if (strcmp(value, "%k") == 0)
1417 err(rules->udev, "NAME=\"%%k\" is superfluous and breaks "
1418 "kernel supplied names, please remove it from %s:%u\n", filename, lineno);
1419 rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL);
1420 attr = get_key_attribute(rules->udev, key + sizeof("NAME")-1);
1422 if (strstr(attr, "all_partitions") != NULL) {
1423 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1425 dbg(rules->udev, "creation of partition nodes requested\n");
1426 rule_add_key(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1428 if (strstr(attr, "ignore_remove") != NULL) {
1429 dbg(rules->udev, "remove event should be ignored\n");
1430 rule_add_key(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1434 rule_tmp.rule.rule.flags = 1;
1438 if (strncmp(key, "SYMLINK", sizeof("SYMLINK")-1) == 0) {
1439 if (op < OP_MATCH_MAX) {
1440 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
1444 attr = get_key_attribute(rules->udev, key + sizeof("SYMLINK")-1);
1445 if (attr != NULL && strstr(attr, "unique") != NULL)
1447 rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, &flag);
1449 rule_tmp.rule.rule.flags = 1;
1453 if (strcmp(key, "OWNER") == 0) {
1457 uid = strtoul(value, &endptr, 10);
1458 if (endptr[0] == '\0') {
1459 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1460 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1461 uid = add_uid(rules, value);
1462 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1463 } else if (rules->resolve_names >= 0) {
1464 rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
1466 rule_tmp.rule.rule.flags = 1;
1470 if (strcmp(key, "GROUP") == 0) {
1474 gid = strtoul(value, &endptr, 10);
1475 if (endptr[0] == '\0') {
1476 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1477 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1478 gid = add_gid(rules, value);
1479 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1480 } else if (rules->resolve_names >= 0) {
1481 rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
1483 rule_tmp.rule.rule.flags = 1;
1487 if (strcmp(key, "MODE") == 0) {
1491 mode = strtol(value, &endptr, 8);
1492 if (endptr[0] == '\0')
1493 rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1495 rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
1496 rule_tmp.rule.rule.flags = 1;
1500 if (strcmp(key, "OPTIONS") == 0) {
1503 if (strstr(value, "last_rule") != NULL) {
1504 dbg(rules->udev, "last rule to be applied\n");
1505 rule_add_key(&rule_tmp, TK_A_LAST_RULE, 0, NULL, NULL);
1507 if (strstr(value, "ignore_device") != NULL) {
1508 dbg(rules->udev, "device should be ignored\n");
1509 rule_add_key(&rule_tmp, TK_A_IGNORE_DEVICE, 0, NULL, NULL);
1511 if (strstr(value, "ignore_remove") != NULL) {
1512 dbg(rules->udev, "remove event should be ignored\n");
1513 rule_add_key(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1515 pos = strstr(value, "link_priority=");
1517 int prio = atoi(&pos[strlen("link_priority=")]);
1519 rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, 0, NULL, &prio);
1520 dbg(rules->udev, "link priority=%i\n", prio);
1522 pos = strstr(value, "event_timeout=");
1524 int tout = atoi(&pos[strlen("event_timeout=")]);
1526 rule_add_key(&rule_tmp, TK_A_EVENT_TIMEOUT, 0, NULL, &tout);
1527 dbg(rules->udev, "event timeout=%i\n", tout);
1529 pos = strstr(value, "string_escape=");
1531 pos = &pos[strlen("string_escape=")];
1532 if (strncmp(pos, "none", strlen("none")) == 0)
1533 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, 0, NULL, NULL);
1534 else if (strncmp(pos, "replace", strlen("replace")) == 0)
1535 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, 0, NULL, NULL);
1537 if (strstr(value, "all_partitions") != NULL) {
1538 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1540 rule_add_key(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1541 dbg(rules->udev, "creation of partition nodes requested\n");
1543 pos = strstr(value, "nowatch");
1547 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, 0, NULL, &off);
1548 dbg(rules->udev, "inotify watch of device disabled\n");
1550 pos = strstr(value, "watch");
1554 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, 0, NULL, &on);
1555 dbg(rules->udev, "inotify watch of device requested\n");
1560 err(rules->udev, "unknown key '%s' in %s:%u\n", key, filename, lineno);
1563 /* add rule token */
1564 rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur;
1565 if (add_token(rules, &rule_tmp.rule) != 0)
1568 /* add tokens to list, sorted by type */
1569 if (sort_token(rules, &rule_tmp) != 0)
1574 err(rules->udev, "invalid rule '%s:%u'\n", filename, lineno);
1578 static int parse_file(struct udev_rules *rules, const char *filename, unsigned short filename_off)
1581 unsigned int first_token;
1582 char line[UTIL_LINE_SIZE];
1586 info(rules->udev, "reading '%s' as rules file\n", filename);
1588 f = fopen(filename, "r");
1592 first_token = rules->token_cur;
1594 while (fgets(line, sizeof(line), f) != NULL) {
1598 /* skip whitespace */
1601 while (isspace(key[0]))
1612 /* continue reading if backslash+newline is found */
1613 while (line[len-2] == '\\') {
1614 if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1616 if (strlen(&line[len-2]) < 2)
1622 if (len+1 >= sizeof(line)) {
1623 err(rules->udev, "line too long '%s':%u, ignored\n", filename, line_nr);
1626 add_rule(rules, key, filename, filename_off, line_nr);
1630 /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1631 for (i = first_token+1; i < rules->token_cur; i++) {
1632 if (rules->tokens[i].type == TK_A_GOTO) {
1633 char *label = &rules->buf[rules->tokens[i].key.value_off];
1636 for (j = i+1; j < rules->token_cur; j++) {
1637 if (rules->tokens[j].type != TK_RULE)
1639 if (rules->tokens[j].rule.label_off == 0)
1641 if (strcmp(label, &rules->buf[rules->tokens[j].rule.label_off]) != 0)
1643 rules->tokens[i].key.rule_goto = j;
1646 if (rules->tokens[i].key.rule_goto == 0)
1647 err(rules->udev, "GOTO '%s' has no matching label in: '%s'\n", label, filename);
1653 static int add_matching_files(struct udev *udev, struct udev_list_node *file_list, const char *dirname, const char *suffix)
1656 char filename[UTIL_PATH_SIZE];
1658 dbg(udev, "open directory '%s'\n", dirname);
1659 dir = opendir(dirname);
1661 info(udev, "unable to open '%s': %m\n", dirname);
1666 struct dirent *dent;
1668 dent = readdir(dir);
1669 if (dent == NULL || dent->d_name[0] == '\0')
1672 if (dent->d_name[0] == '.')
1675 /* look for file matching with specified suffix */
1676 if (suffix != NULL) {
1679 ext = strrchr(dent->d_name, '.');
1682 if (strcmp(ext, suffix) != 0)
1685 util_strscpyl(filename, sizeof(filename), dirname, "/", dent->d_name, NULL);
1686 dbg(udev, "put file '%s' into list\n", filename);
1687 udev_list_entry_add(udev, file_list, filename, NULL, 1, 1);
1694 struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
1696 struct udev_rules *rules;
1697 struct stat statbuf;
1698 struct udev_list_node file_list;
1699 struct udev_list_entry *file_loop, *file_tmp;
1700 struct token end_token;
1702 rules = malloc(sizeof(struct udev_rules));
1705 memset(rules, 0x00, sizeof(struct udev_rules));
1707 rules->resolve_names = resolve_names;
1708 udev_list_init(&file_list);
1710 /* init token array and string buffer */
1711 rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
1712 if (rules->tokens == NULL)
1714 rules->token_max = PREALLOC_TOKEN;
1716 rules->buf = malloc(PREALLOC_STRBUF);
1717 if (rules->buf == NULL)
1719 rules->buf_max = PREALLOC_STRBUF;
1720 /* offset 0 is always '\0' */
1721 rules->buf[0] = '\0';
1723 dbg(udev, "prealloc %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1724 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1726 rules->trie_nodes = malloc(PREALLOC_TRIE * sizeof(struct trie_node));
1727 if (rules->trie_nodes == NULL)
1729 rules->trie_nodes_max = PREALLOC_TRIE;
1730 /* offset 0 is the trie root, with an empty string */
1731 memset(rules->trie_nodes, 0x00, sizeof(struct trie_node));
1732 rules->trie_nodes_cur = 1;
1734 if (udev_get_rules_path(udev) != NULL) {
1735 /* custom rules location for testing */
1736 add_matching_files(udev, &file_list, udev_get_rules_path(udev), ".rules");
1738 char filename[PATH_MAX];
1739 struct udev_list_node sort_list;
1740 struct udev_list_entry *sort_loop, *sort_tmp;
1742 /* read user/custom rules */
1743 add_matching_files(udev, &file_list, SYSCONFDIR "/udev/rules.d", ".rules");
1745 /* read dynamic/temporary rules */
1746 util_strscpyl(filename, sizeof(filename), udev_get_dev_path(udev), "/.udev/rules.d", NULL);
1747 if (stat(filename, &statbuf) != 0) {
1748 util_create_path(udev, filename);
1749 udev_selinux_setfscreatecon(udev, filename, S_IFDIR|0755);
1750 mkdir(filename, 0755);
1751 udev_selinux_resetfscreatecon(udev);
1753 udev_list_init(&sort_list);
1754 add_matching_files(udev, &sort_list, filename, ".rules");
1756 /* read default rules */
1757 add_matching_files(udev, &sort_list, LIBEXECDIR "/rules.d", ".rules");
1759 /* sort all rules files by basename into list of files */
1760 udev_list_entry_foreach_safe(sort_loop, sort_tmp, udev_list_get_entry(&sort_list)) {
1761 const char *sort_name = udev_list_entry_get_name(sort_loop);
1762 const char *sort_base = strrchr(sort_name, '/');
1764 if (sort_base == NULL)
1766 /* sort entry into existing list */
1767 udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1768 const char *file_name = udev_list_entry_get_name(file_loop);
1769 const char *file_base = strrchr(file_name, '/');
1771 if (file_base == NULL)
1773 if (strcmp(file_base, sort_base) == 0) {
1774 info(udev, "rule file basename '%s' already added, ignoring '%s'\n",
1775 file_name, sort_name);
1776 udev_list_entry_delete(sort_loop);
1780 if (strcmp(file_base, sort_base) > 0) {
1781 /* found later file, insert before */
1782 udev_list_entry_remove(sort_loop);
1783 udev_list_entry_insert_before(sort_loop, file_loop);
1788 /* current file already handled */
1789 if (sort_loop == NULL)
1791 /* no later file, append to end of list */
1792 udev_list_entry_remove(sort_loop);
1793 udev_list_entry_append(sort_loop, &file_list);
1797 /* add all filenames to the string buffer */
1798 udev_list_entry_foreach(file_loop, udev_list_get_entry(&file_list)) {
1799 const char *filename = udev_list_entry_get_name(file_loop);
1800 unsigned int filename_off;
1802 filename_off = add_string(rules, filename);
1803 /* the offset in the rule is limited to unsigned short */
1804 if (filename_off < USHRT_MAX)
1805 udev_list_entry_set_flag(file_loop, filename_off);
1808 /* parse list of files */
1809 udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1810 const char *filename = udev_list_entry_get_name(file_loop);
1811 unsigned int filename_off = udev_list_entry_get_flag(file_loop);
1813 if (stat(filename, &statbuf) == 0 && statbuf.st_size > 0)
1814 parse_file(rules, filename, filename_off);
1816 err(udev, "can not read '%s'\n", filename);
1817 udev_list_entry_delete(file_loop);
1820 memset(&end_token, 0x00, sizeof(struct token));
1821 end_token.type = TK_END;
1822 add_token(rules, &end_token);
1824 /* shrink allocated token and string buffer */
1825 if (rules->token_cur < rules->token_max) {
1826 struct token *tokens;
1828 tokens = realloc(rules->tokens, rules->token_cur * sizeof(struct token));
1829 if (tokens != NULL || rules->token_cur == 0) {
1830 rules->tokens = tokens;
1831 rules->token_max = rules->token_cur;
1834 if (rules->buf_cur < rules->buf_max) {
1837 buf = realloc(rules->buf, rules->buf_cur);
1838 if (buf != NULL || rules->buf_cur == 0) {
1840 rules->buf_max = rules->buf_cur;
1843 info(udev, "rules use %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1844 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1845 info(udev, "temporary index used %zu bytes (%u * %zu bytes)\n",
1846 rules->trie_nodes_cur * sizeof(struct trie_node),
1847 rules->trie_nodes_cur, sizeof(struct trie_node));
1850 free(rules->trie_nodes);
1851 rules->trie_nodes = NULL;
1852 rules->trie_nodes_cur = 0;
1853 rules->trie_nodes_max = 0;
1855 /* cleanup uid/gid cache */
1858 rules->uids_cur = 0;
1859 rules->uids_max = 0;
1862 rules->gids_cur = 0;
1863 rules->gids_max = 0;
1869 void udev_rules_unref(struct udev_rules *rules)
1873 free(rules->tokens);
1875 free(rules->trie_nodes);
1881 static int match_key(struct udev_rules *rules, struct token *token, const char *val)
1883 char *key_value = &rules->buf[token->key.value_off];
1890 switch (token->key.glob) {
1892 match = (strcmp(key_value, val) == 0);
1895 match = (fnmatch(key_value, val, 0) == 0);
1902 split = &rules->buf[token->key.value_off];
1907 next = strchr(split, '|');
1909 size_t matchlen = (size_t)(next - split);
1911 match = (matchlen == len && strncmp(split, val, matchlen) == 0);
1915 match = (strcmp(split, val) == 0);
1924 char value[UTIL_PATH_SIZE];
1926 util_strscpy(value, sizeof(value), &rules->buf[token->key.value_off]);
1928 while (key_value != NULL) {
1929 pos = strchr(key_value, '|');
1934 dbg(rules->udev, "match %s '%s' <-> '%s'\n", token_str(token->type), key_value, val);
1935 match = (fnmatch(key_value, val, 0) == 0);
1943 match = (val[0] != '\0');
1949 if (match && (token->key.op == OP_MATCH)) {
1950 dbg(rules->udev, "%s is true (matching value)\n", token_str(token->type));
1953 if (!match && (token->key.op == OP_NOMATCH)) {
1954 dbg(rules->udev, "%s is true (non-matching value)\n", token_str(token->type));
1957 dbg(rules->udev, "%s is not true\n", token_str(token->type));
1961 static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur)
1964 char nbuf[UTIL_NAME_SIZE];
1966 char vbuf[UTIL_NAME_SIZE];
1969 name = &rules->buf[cur->key.attr_off];
1970 switch (cur->key.attrsubst) {
1972 udev_event_apply_format(event, name, nbuf, sizeof(nbuf));
1976 value = udev_device_get_sysattr_value(dev, name);
1981 if (util_resolve_subsys_kernel(event->udev, name, vbuf, sizeof(vbuf), 1) != 0)
1989 /* remove trailing whitespace, if not asked to match for it */
1990 len = strlen(value);
1991 if (len > 0 && isspace(value[len-1])) {
1992 const char *key_value;
1995 key_value = &rules->buf[cur->key.value_off];
1996 klen = strlen(key_value);
1997 if (klen > 0 && !isspace(key_value[klen-1])) {
1998 if (value != vbuf) {
1999 util_strscpy(vbuf, sizeof(vbuf), value);
2002 while (len > 0 && isspace(vbuf[--len]))
2004 dbg(rules->udev, "removed trailing whitespace from '%s'\n", value);
2008 return match_key(rules, cur, value);
2017 int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event)
2021 enum escape_type esc = ESCAPE_UNSET;
2024 if (rules->tokens == NULL)
2027 can_set_name = ((strcmp(udev_device_get_action(event->dev), "add") == 0 ||
2028 strcmp(udev_device_get_action(event->dev), "change") == 0) &&
2029 (major(udev_device_get_devnum(event->dev)) > 0 ||
2030 strcmp(udev_device_get_subsystem(event->dev), "net") == 0));
2032 /* loop through token list, match, run actions or forward to next rule */
2033 cur = &rules->tokens[0];
2036 dump_token(rules, cur);
2037 switch (cur->type) {
2041 /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
2042 if (!can_set_name && rule->rule.flags)
2047 if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
2051 if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
2055 if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
2060 size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
2061 struct udev_list_entry *list_entry;
2064 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
2065 const char *devlink;
2067 devlink = &udev_list_entry_get_name(list_entry)[devlen];
2068 if (match_key(rules, cur, devlink) == 0) {
2078 if (match_key(rules, cur, event->name) != 0)
2083 const char *key_name = &rules->buf[cur->key.attr_off];
2086 value = udev_device_get_property_value(event->dev, key_name);
2087 if (value == NULL) {
2088 dbg(event->udev, "ENV{%s} is not set, treat as empty\n", key_name);
2091 if (match_key(rules, cur, value))
2095 case TK_M_SUBSYSTEM:
2096 if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
2100 if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
2105 char filename[UTIL_PATH_SIZE];
2108 udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename));
2109 found = (wait_for_file(event->dev, filename, 10) == 0);
2110 if (!found && (cur->key.op != OP_NOMATCH))
2115 if (match_attr(rules, event->dev, event, cur) != 0)
2119 case TK_M_SUBSYSTEMS:
2125 /* get whole sequence of parent matches */
2127 while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX)
2130 /* loop over parents */
2131 event->dev_parent = event->dev;
2135 dbg(event->udev, "parent: '%s'\n", udev_device_get_syspath(event->dev_parent));
2136 /* loop over sequence of parent match keys */
2137 for (key = cur; key < next; key++ ) {
2138 dump_token(rules, key);
2141 if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
2144 case TK_M_SUBSYSTEMS:
2145 if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
2149 if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
2153 if (match_attr(rules, event->dev_parent, event, key) != 0)
2159 dbg(event->udev, "parent key matched\n");
2161 dbg(event->udev, "all parent keys matched\n");
2162 /* all keys matched */
2166 event->dev_parent = udev_device_get_parent(event->dev_parent);
2167 if (event->dev_parent == NULL)
2170 /* move behind our sequence of parent match keys */
2176 char filename[UTIL_PATH_SIZE];
2177 struct stat statbuf;
2180 udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename));
2181 if (util_resolve_subsys_kernel(event->udev, filename, filename, sizeof(filename), 0) != 0) {
2182 if (filename[0] != '/') {
2183 char tmp[UTIL_PATH_SIZE];
2185 util_strscpy(tmp, sizeof(tmp), filename);
2186 util_strscpyl(filename, sizeof(filename),
2187 udev_device_get_syspath(event->dev), "/", tmp, NULL);
2190 attr_subst_subdir(filename, sizeof(filename));
2192 match = (stat(filename, &statbuf) == 0);
2193 dbg(event->udev, "'%s' %s", filename, match ? "exists\n" : "does not exist\n");
2194 if (match && cur->key.mode > 0) {
2195 match = ((statbuf.st_mode & cur->key.mode) > 0);
2196 dbg(event->udev, "'%s' has mode=%#o and %s %#o\n", filename, statbuf.st_mode,
2197 match ? "matches" : "does not match", cur->key.mode);
2199 if (match && cur->key.op == OP_NOMATCH)
2201 if (!match && cur->key.op == OP_MATCH)
2207 char program[UTIL_PATH_SIZE];
2209 char result[UTIL_PATH_SIZE];
2211 free(event->program_result);
2212 event->program_result = NULL;
2213 udev_event_apply_format(event, &rules->buf[cur->key.value_off], program, sizeof(program));
2214 envp = udev_device_get_properties_envp(event->dev);
2215 info(event->udev, "PROGRAM '%s' %s:%u\n",
2217 &rules->buf[rule->rule.filename_off],
2218 rule->rule.filename_line);
2219 if (util_run_program(event->udev, program, envp, result, sizeof(result), NULL, NULL) != 0) {
2220 if (cur->key.op != OP_NOMATCH)
2225 util_remove_trailing_chars(result, '\n');
2226 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2227 count = udev_util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
2229 info(event->udev, "%i character(s) replaced\n" , count);
2231 event->program_result = strdup(result);
2232 dbg(event->udev, "storing result '%s'\n", event->program_result);
2233 if (cur->key.op == OP_NOMATCH)
2238 case TK_M_IMPORT_FILE:
2240 char import[UTIL_PATH_SIZE];
2242 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2243 if (import_file_into_properties(event->dev, import) != 0)
2244 if (cur->key.op != OP_NOMATCH)
2248 case TK_M_IMPORT_PROG:
2250 char import[UTIL_PATH_SIZE];
2252 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2253 info(event->udev, "IMPORT '%s' %s:%u\n",
2255 &rules->buf[rule->rule.filename_off],
2256 rule->rule.filename_line);
2257 if (import_program_into_properties(event->dev, import) != 0)
2258 if (cur->key.op != OP_NOMATCH)
2262 case TK_M_IMPORT_PARENT:
2264 char import[UTIL_PATH_SIZE];
2266 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2267 if (import_parent_into_properties(event->dev, import) != 0)
2268 if (cur->key.op != OP_NOMATCH)
2273 if (match_key(rules, cur, event->program_result) != 0)
2277 case TK_A_IGNORE_DEVICE:
2278 event->ignore_device = 1;
2281 case TK_A_STRING_ESCAPE_NONE:
2284 case TK_A_STRING_ESCAPE_REPLACE:
2285 esc = ESCAPE_REPLACE;
2287 case TK_A_NUM_FAKE_PART:
2288 if (strcmp(udev_device_get_subsystem(event->dev), "block") != 0)
2290 if (udev_device_get_sysnum(event->dev) != NULL)
2292 udev_device_set_num_fake_partitions(event->dev, cur->key.num_fake_part);
2294 case TK_A_INOTIFY_WATCH:
2295 event->inotify_watch = cur->key.watch;
2297 case TK_A_DEVLINK_PRIO:
2298 udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
2302 char owner[UTIL_NAME_SIZE];
2304 if (event->owner_final)
2306 if (cur->key.op == OP_ASSIGN_FINAL)
2307 event->owner_final = 1;
2308 udev_event_apply_format(event, &rules->buf[cur->key.value_off], owner, sizeof(owner));
2309 event->uid = util_lookup_user(event->udev, owner);
2310 info(event->udev, "OWNER %u %s:%u\n",
2312 &rules->buf[rule->rule.filename_off],
2313 rule->rule.filename_line);
2318 char group[UTIL_NAME_SIZE];
2320 if (event->group_final)
2322 if (cur->key.op == OP_ASSIGN_FINAL)
2323 event->group_final = 1;
2324 udev_event_apply_format(event, &rules->buf[cur->key.value_off], group, sizeof(group));
2325 event->gid = util_lookup_group(event->udev, group);
2326 info(event->udev, "GROUP %u %s:%u\n",
2328 &rules->buf[rule->rule.filename_off],
2329 rule->rule.filename_line);
2334 char mode[UTIL_NAME_SIZE];
2337 if (event->mode_final)
2339 if (cur->key.op == OP_ASSIGN_FINAL)
2340 event->mode_final = 1;
2341 udev_event_apply_format(event, &rules->buf[cur->key.value_off], mode, sizeof(mode));
2342 event->mode = strtol(mode, &endptr, 8);
2343 if (endptr[0] != '\0') {
2344 err(event->udev, "invalide mode '%s' set default mode 0660\n", mode);
2347 info(event->udev, "MODE %#o %s:%u\n",
2349 &rules->buf[rule->rule.filename_off],
2350 rule->rule.filename_line);
2354 if (event->owner_final)
2356 if (cur->key.op == OP_ASSIGN_FINAL)
2357 event->owner_final = 1;
2358 event->uid = cur->key.uid;
2359 info(event->udev, "OWNER %u %s:%u\n",
2361 &rules->buf[rule->rule.filename_off],
2362 rule->rule.filename_line);
2365 if (event->group_final)
2367 if (cur->key.op == OP_ASSIGN_FINAL)
2368 event->group_final = 1;
2369 event->gid = cur->key.gid;
2370 info(event->udev, "GROUP %u %s:%u\n",
2372 &rules->buf[rule->rule.filename_off],
2373 rule->rule.filename_line);
2376 if (event->mode_final)
2378 if (cur->key.op == OP_ASSIGN_FINAL)
2379 event->mode_final = 1;
2380 event->mode = cur->key.mode;
2381 info(event->udev, "MODE %#o %s:%u\n",
2383 &rules->buf[rule->rule.filename_off],
2384 rule->rule.filename_line);
2388 const char *name = &rules->buf[cur->key.attr_off];
2389 char *value = &rules->buf[cur->key.value_off];
2391 if (value[0] != '\0') {
2392 char temp_value[UTIL_NAME_SIZE];
2393 struct udev_list_entry *entry;
2395 udev_event_apply_format(event, value, temp_value, sizeof(temp_value));
2396 entry = udev_device_add_property(event->dev, name, temp_value);
2397 /* store in db, skip private keys */
2399 udev_list_entry_set_flag(entry, 1);
2401 udev_device_add_property(event->dev, name, NULL);
2407 const char *name = &rules->buf[cur->key.value_off];
2408 char name_str[UTIL_PATH_SIZE];
2411 if (event->name_final)
2413 if (cur->key.op == OP_ASSIGN_FINAL)
2414 event->name_final = 1;
2415 udev_event_apply_format(event, name, name_str, sizeof(name_str));
2416 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2417 count = udev_util_replace_chars(name_str, "/");
2419 info(event->udev, "%i character(s) replaced\n", count);
2422 event->name = strdup(name_str);
2423 info(event->udev, "NAME '%s' %s:%u\n",
2425 &rules->buf[rule->rule.filename_off],
2426 rule->rule.filename_line);
2431 char temp[UTIL_PATH_SIZE];
2432 char filename[UTIL_PATH_SIZE];
2436 if (event->devlink_final)
2438 if (major(udev_device_get_devnum(event->dev)) == 0)
2440 if (cur->key.op == OP_ASSIGN_FINAL)
2441 event->devlink_final = 1;
2442 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2443 udev_device_cleanup_devlinks_list(event->dev);
2445 /* allow multiple symlinks separated by spaces */
2446 udev_event_apply_format(event, &rules->buf[cur->key.value_off], temp, sizeof(temp));
2447 if (esc == ESCAPE_UNSET)
2448 count = udev_util_replace_chars(temp, "/ ");
2449 else if (esc == ESCAPE_REPLACE)
2450 count = udev_util_replace_chars(temp, "/");
2452 info(event->udev, "%i character(s) replaced\n" , count);
2453 dbg(event->udev, "rule applied, added symlink(s) '%s'\n", temp);
2455 while (isspace(pos[0]))
2457 next = strchr(pos, ' ');
2458 while (next != NULL) {
2460 info(event->udev, "LINK '%s' %s:%u\n", pos,
2461 &rules->buf[rule->rule.filename_off], rule->rule.filename_line);
2462 util_strscpyl(filename, sizeof(filename), udev_get_dev_path(event->udev), "/", pos, NULL);
2463 udev_device_add_devlink(event->dev, filename, cur->key.devlink_unique);
2464 while (isspace(next[1]))
2467 next = strchr(pos, ' ');
2469 if (pos[0] != '\0') {
2470 info(event->udev, "LINK '%s' %s:%u\n", pos,
2471 &rules->buf[rule->rule.filename_off], rule->rule.filename_line);
2472 util_strscpyl(filename, sizeof(filename), udev_get_dev_path(event->udev), "/", pos, NULL);
2473 udev_device_add_devlink(event->dev, filename, cur->key.devlink_unique);
2477 case TK_A_EVENT_TIMEOUT:
2478 udev_device_set_event_timeout(event->dev, cur->key.event_timeout);
2480 case TK_A_IGNORE_REMOVE:
2481 udev_device_set_ignore_remove(event->dev, 1);
2485 const char *key_name = &rules->buf[cur->key.attr_off];
2486 char attr[UTIL_PATH_SIZE];
2487 char value[UTIL_NAME_SIZE];
2490 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0)
2491 util_strscpyl(attr, sizeof(attr), udev_device_get_syspath(event->dev), "/", key_name, NULL);
2492 attr_subst_subdir(attr, sizeof(attr));
2494 udev_event_apply_format(event, &rules->buf[cur->key.value_off], value, sizeof(value));
2495 info(event->udev, "ATTR '%s' writing '%s' %s:%u\n", attr, value,
2496 &rules->buf[rule->rule.filename_off],
2497 rule->rule.filename_line);
2498 f = fopen(attr, "w");
2500 if (fprintf(f, "%s", value) <= 0)
2501 err(event->udev, "error writing ATTR{%s}: %m\n", attr);
2504 err(event->udev, "error opening ATTR{%s} for writing: %m\n", attr);
2510 struct udev_list_entry *list_entry;
2512 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2513 udev_list_cleanup_entries(event->udev, &event->run_list);
2514 info(event->udev, "RUN '%s' %s:%u\n",
2515 &rules->buf[cur->key.value_off],
2516 &rules->buf[rule->rule.filename_off],
2517 rule->rule.filename_line);
2518 list_entry = udev_list_entry_add(event->udev, &event->run_list,
2519 &rules->buf[cur->key.value_off], NULL, 1, 0);
2520 if (cur->key.fail_on_error)
2521 udev_list_entry_set_flag(list_entry, 1);
2525 if (cur->key.rule_goto == 0)
2527 cur = &rules->tokens[cur->key.rule_goto];
2529 case TK_A_LAST_RULE:
2533 case TK_M_PARENTS_MIN:
2534 case TK_M_PARENTS_MAX:
2537 err(rules->udev, "wrong type %u\n", cur->type);
2544 /* fast-forward to next rule */
2545 cur = rule + rule->rule.token_count;
2546 dbg(rules->udev, "forward to rule: %u\n",
2547 (unsigned int) (cur - rules->tokens));