2 * Copyright (C) 2008 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/>.
33 #define PREALLOC_TOKEN 2048
34 #define PREALLOC_STRBUF 32 * 1024
35 #define PREALLOC_TRIE 256
38 unsigned int name_off;
46 /* this node's first child */
47 unsigned int child_idx;
48 /* the next child of our parent node's child list */
49 unsigned int next_child_idx;
50 /* this node's last child (shortcut for append) */
51 unsigned int last_child_idx;
52 unsigned int value_off;
53 unsigned short value_len;
61 /* every key in the rules file becomes a token */
63 unsigned int token_cur;
64 unsigned int token_max;
66 /* all key strings are copied to a single string buffer */
70 unsigned int buf_count;
72 /* during rule parsing, strings are indexed to find duplicates */
73 struct trie_node *trie_nodes;
74 unsigned int trie_nodes_cur;
75 unsigned int trie_nodes_max;
77 /* during rule parsing, uid/gid lookup results are cached */
79 unsigned int uids_cur;
80 unsigned int uids_max;
82 unsigned int gids_cur;
83 unsigned int gids_max;
86 /* KEY=="", KEY!="", KEY+="", KEY="", KEY:="" */
99 enum string_glob_type {
101 GL_PLAIN, /* no special chars */
102 GL_GLOB, /* shell globs ?,*,[] */
103 GL_SPLIT, /* multi-value A|B */
104 GL_SPLIT_GLOB, /* multi-value with glob A*|B* */
105 GL_SOMETHING, /* commonly used "?*" */
109 /* tokens of a rule are sorted/handled in this order */
114 TK_M_ACTION, /* val */
115 TK_M_DEVPATH, /* val */
116 TK_M_KERNEL, /* val */
117 TK_M_DEVLINK, /* val */
119 TK_M_ENV, /* val, attr */
120 TK_M_SUBSYSTEM, /* val */
121 TK_M_DRIVER, /* val */
122 TK_M_WAITFOR, /* val */
123 TK_M_ATTR, /* val, attr */
126 TK_M_KERNELS, /* val */
127 TK_M_SUBSYSTEMS, /* val */
128 TK_M_DRIVERS, /* val */
129 TK_M_ATTRS, /* val, attr */
132 TK_M_TEST, /* val, mode_t */
133 TK_M_PROGRAM, /* val */
134 TK_M_IMPORT_FILE, /* val */
135 TK_M_IMPORT_PROG, /* val */
136 TK_M_IMPORT_PARENT, /* val */
137 TK_M_RESULT, /* val */
141 TK_A_STRING_ESCAPE_NONE,
142 TK_A_STRING_ESCAPE_REPLACE,
143 TK_A_INOTIFY_WATCH, /* int */
144 TK_A_NUM_FAKE_PART, /* int */
145 TK_A_DEVLINK_PRIO, /* int */
146 TK_A_OWNER, /* val */
147 TK_A_GROUP, /* val */
149 TK_A_OWNER_ID, /* uid_t */
150 TK_A_GROUP_ID, /* gid_t */
151 TK_A_MODE_ID, /* mode_t */
152 TK_A_ENV, /* val, attr */
154 TK_A_DEVLINK, /* val */
155 TK_A_EVENT_TIMEOUT, /* int */
157 TK_A_ATTR, /* val, attr */
158 TK_A_RUN, /* val, bool */
159 TK_A_GOTO, /* size_t */
165 /* we try to pack stuff in a way that we take only 12 bytes per token */
168 unsigned char type; /* same as in rule and key */
172 unsigned short token_count;
173 unsigned int label_off;
174 unsigned short filename_off;
175 unsigned short filename_line;
182 unsigned int value_off;
184 unsigned int attr_off;
186 unsigned int rule_goto;
201 struct udev_rules *rules;
203 struct token token[MAX_TK];
204 unsigned int token_cur;
208 static const char *operation_str(enum operation_type type)
210 static const char *operation_strs[] = {
211 [OP_UNSET] = "UNSET",
212 [OP_MATCH] = "match",
213 [OP_NOMATCH] = "nomatch",
214 [OP_MATCH_MAX] = "MATCH_MAX",
217 [OP_ASSIGN] = "assign",
218 [OP_ASSIGN_FINAL] = "assign-final",
221 return operation_strs[type];
224 static const char *string_glob_str(enum string_glob_type type)
226 static const char *string_glob_strs[] = {
227 [GL_UNSET] = "UNSET",
228 [GL_PLAIN] = "plain",
230 [GL_SPLIT] = "split",
231 [GL_SPLIT_GLOB] = "split-glob",
232 [GL_SOMETHING] = "split-glob",
233 [GL_FORMAT] = "format",
236 return string_glob_strs[type];
239 static const char *token_str(enum token_type type)
241 static const char *token_strs[] = {
242 [TK_UNSET] = "UNSET",
245 [TK_M_ACTION] = "M ACTION",
246 [TK_M_DEVPATH] = "M DEVPATH",
247 [TK_M_KERNEL] = "M KERNEL",
248 [TK_M_DEVLINK] = "M DEVLINK",
249 [TK_M_NAME] = "M NAME",
250 [TK_M_ENV] = "M ENV",
251 [TK_M_SUBSYSTEM] = "M SUBSYSTEM",
252 [TK_M_DRIVER] = "M DRIVER",
253 [TK_M_WAITFOR] = "M WAITFOR",
254 [TK_M_ATTR] = "M ATTR",
256 [TK_M_PARENTS_MIN] = "M PARENTS_MIN",
257 [TK_M_KERNELS] = "M KERNELS",
258 [TK_M_SUBSYSTEMS] = "M SUBSYSTEMS",
259 [TK_M_DRIVERS] = "M DRIVERS",
260 [TK_M_ATTRS] = "M ATTRS",
261 [TK_M_PARENTS_MAX] = "M PARENTS_MAX",
263 [TK_M_TEST] = "M TEST",
264 [TK_M_PROGRAM] = "M PROGRAM",
265 [TK_M_IMPORT_FILE] = "M IMPORT_FILE",
266 [TK_M_IMPORT_PROG] = "M IMPORT_PROG",
267 [TK_M_IMPORT_PARENT] = "M MPORT_PARENT",
268 [TK_M_RESULT] = "M RESULT",
269 [TK_M_MAX] = "M MAX",
271 [TK_A_IGNORE_DEVICE] = "A IGNORE_DEVICE",
272 [TK_A_STRING_ESCAPE_NONE] = "A STRING_ESCAPE_NONE",
273 [TK_A_STRING_ESCAPE_REPLACE] = "A STRING_ESCAPE_REPLACE",
274 [TK_A_INOTIFY_WATCH] = "A INOTIFY_WATCH",
275 [TK_A_NUM_FAKE_PART] = "A NUM_FAKE_PART",
276 [TK_A_DEVLINK_PRIO] = "A DEVLINK_PRIO",
277 [TK_A_OWNER] = "A OWNER",
278 [TK_A_GROUP] = "A GROUP",
279 [TK_A_MODE] = "A MODE",
280 [TK_A_OWNER_ID] = "A OWNER_ID",
281 [TK_A_GROUP_ID] = "A GROUP_ID",
282 [TK_A_MODE_ID] = "A MODE_ID",
283 [TK_A_ENV] = "A ENV",
284 [TK_A_NAME] = "A NAME",
285 [TK_A_DEVLINK] = "A DEVLINK",
286 [TK_A_EVENT_TIMEOUT] = "A EVENT_TIMEOUT",
287 [TK_A_IGNORE_REMOVE] = "A IGNORE_REMOVE",
288 [TK_A_ATTR] = "A ATTR",
289 [TK_A_RUN] = "A RUN",
290 [TK_A_GOTO] = "A GOTO",
291 [TK_A_LAST_RULE] = "A LAST_RULE",
296 return token_strs[type];
299 static void dump_token(struct udev_rules *rules, struct token *token)
301 enum token_type type = token->type;
302 enum operation_type op = token->key.op;
303 enum string_glob_type glob = token->key.glob;
304 const char *value = &rules->buf[token->key.value_off];
305 const char *attr = &rules->buf[token->key.attr_off];
310 const char *tks_ptr = (char *)rules->tokens;
311 const char *tk_ptr = (char *)token;
312 unsigned int idx = (tk_ptr - tks_ptr) / sizeof(struct token);
314 dbg(rules->udev, "* RULE %s:%u, token: %u, count: %u, label: '%s', flags: 0x%02x\n",
315 &rules->buf[token->rule.filename_off], token->rule.filename_line,
316 idx, token->rule.token_count,
317 &rules->buf[token->rule.label_off],
330 case TK_M_SUBSYSTEMS:
333 case TK_M_IMPORT_FILE:
334 case TK_M_IMPORT_PROG:
335 case TK_M_IMPORT_PARENT:
343 dbg(rules->udev, "%s %s '%s'(%s)\n",
344 token_str(type), operation_str(op), value, string_glob_str(glob));
351 dbg(rules->udev, "%s %s '%s' '%s'(%s)\n",
352 token_str(type), operation_str(op), attr, value, string_glob_str(glob));
354 case TK_A_IGNORE_DEVICE:
355 case TK_A_STRING_ESCAPE_NONE:
356 case TK_A_STRING_ESCAPE_REPLACE:
358 case TK_A_IGNORE_REMOVE:
359 dbg(rules->udev, "%s\n", token_str(type));
362 dbg(rules->udev, "%s %s '%s'(%s) %#o\n",
363 token_str(type), operation_str(op), value, string_glob_str(glob), token->key.mode);
365 case TK_A_INOTIFY_WATCH:
366 dbg(rules->udev, "%s %u\n", token_str(type), token->key.watch);
368 case TK_A_NUM_FAKE_PART:
369 dbg(rules->udev, "%s %u\n", token_str(type), token->key.num_fake_part);
371 case TK_A_DEVLINK_PRIO:
372 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.devlink_prio);
375 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.uid);
378 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.gid);
381 dbg(rules->udev, "%s %s %#o\n", token_str(type), operation_str(op), token->key.mode);
383 case TK_A_EVENT_TIMEOUT:
384 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.event_timeout);
387 dbg(rules->udev, "%s '%s' %u\n", token_str(type), value, token->key.rule_goto);
390 dbg(rules->udev, "* %s\n", token_str(type));
392 case TK_M_PARENTS_MIN:
393 case TK_M_PARENTS_MAX:
396 dbg(rules->udev, "unknown type %u\n", type);
401 static void dump_rules(struct udev_rules *rules)
405 dbg(rules->udev, "dumping %u (%zu bytes) tokens, %u (%zu bytes) strings\n",
407 rules->token_cur * sizeof(struct token),
410 for(i = 0; i < rules->token_cur; i++)
411 dump_token(rules, &rules->tokens[i]);
414 static inline const char *operation_str(enum operation_type type) { return NULL; }
415 static inline const char *token_str(enum token_type type) { return NULL; }
416 static inline void dump_token(struct udev_rules *rules, struct token *token) {}
417 static inline void dump_rules(struct udev_rules *rules) {}
420 static int add_new_string(struct udev_rules *rules, const char *str, size_t bytes)
424 /* grow buffer if needed */
425 if (rules->buf_cur + bytes+1 >= rules->buf_max) {
429 /* double the buffer size */
430 add = rules->buf_max;
434 buf = realloc(rules->buf, rules->buf_max + add);
437 dbg(rules->udev, "extend buffer from %zu to %zu\n", rules->buf_max, rules->buf_max + add);
439 rules->buf_max += add;
441 off = rules->buf_cur;
442 memcpy(&rules->buf[rules->buf_cur], str, bytes);
443 rules->buf_cur += bytes;
448 static int add_string(struct udev_rules *rules, const char *str)
450 unsigned int node_idx;
451 struct trie_node *new_node;
452 unsigned int new_node_idx;
457 struct trie_node *parent;
459 /* walk trie, start from last character of str to find matching tails */
463 for (depth = 0; depth <= len; depth++) {
464 struct trie_node *node;
465 unsigned int child_idx;
467 node = &rules->trie_nodes[node_idx];
468 off = node->value_off + node->value_len - len;
470 /* match against current node */
471 if (depth == len || (node->value_len >= len && memcmp(&rules->buf[off], str, len) == 0))
474 /* lookup child node */
475 key = str[len - 1 - depth];
476 child_idx = node->child_idx;
477 while (child_idx > 0) {
478 struct trie_node *child;
480 child = &rules->trie_nodes[child_idx];
481 if (child->key == key)
483 child_idx = child->next_child_idx;
487 node_idx = child_idx;
490 /* string not found, add it */
491 off = add_new_string(rules, str, len + 1);
493 /* grow trie nodes if needed */
494 if (rules->trie_nodes_cur >= rules->trie_nodes_max) {
495 struct trie_node *nodes;
498 /* double the buffer size */
499 add = rules->trie_nodes_max;
503 nodes = realloc(rules->trie_nodes, (rules->trie_nodes_max + add) * sizeof(struct trie_node));
506 dbg(rules->udev, "extend trie nodes from %u to %u\n",
507 rules->trie_nodes_max, rules->trie_nodes_max + add);
508 rules->trie_nodes = nodes;
509 rules->trie_nodes_max += add;
513 new_node_idx = rules->trie_nodes_cur;
514 rules->trie_nodes_cur++;
515 new_node = &rules->trie_nodes[new_node_idx];
516 memset(new_node, 0x00, sizeof(struct trie_node));
517 new_node->value_off = off;
518 new_node->value_len = len;
521 /* join the parent's child list */
522 parent = &rules->trie_nodes[node_idx];
523 if (parent->child_idx == 0) {
524 parent->child_idx = new_node_idx;
526 struct trie_node *last_child;
528 last_child = &rules->trie_nodes[parent->last_child_idx];
529 last_child->next_child_idx = new_node_idx;
531 parent->last_child_idx = new_node_idx;
535 static int add_token(struct udev_rules *rules, struct token *token)
537 /* grow buffer if needed */
538 if (rules->token_cur+1 >= rules->token_max) {
539 struct token *tokens;
542 /* double the buffer size */
543 add = rules->token_max;
547 tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
550 dbg(rules->udev, "extend tokens from %u to %u\n", rules->token_max, rules->token_max + add);
551 rules->tokens = tokens;
552 rules->token_max += add;
554 memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
559 static uid_t add_uid(struct udev_rules *rules, const char *owner)
565 /* lookup, if we know it already */
566 for (i = 0; i < rules->uids_cur; i++) {
567 off = rules->uids[i].name_off;
568 if (strcmp(&rules->buf[off], owner) == 0) {
569 uid = rules->uids[i].uid;
570 dbg(rules->udev, "return existing %u for '%s'\n", uid, owner);
574 uid = util_lookup_user(rules->udev, owner);
576 /* grow buffer if needed */
577 if (rules->uids_cur+1 >= rules->uids_max) {
578 struct uid_gid *uids;
581 /* double the buffer size */
582 add = rules->uids_max;
586 uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
589 dbg(rules->udev, "extend uids from %u to %u\n", rules->uids_max, rules->uids_max + add);
591 rules->uids_max += add;
593 rules->uids[rules->uids_cur].uid = uid;
594 off = add_string(rules, owner);
597 rules->uids[rules->uids_cur].name_off = off;
602 static gid_t add_gid(struct udev_rules *rules, const char *group)
608 /* lookup, if we know it already */
609 for (i = 0; i < rules->gids_cur; i++) {
610 off = rules->gids[i].name_off;
611 if (strcmp(&rules->buf[off], group) == 0) {
612 gid = rules->gids[i].gid;
613 dbg(rules->udev, "return existing %u for '%s'\n", gid, group);
617 gid = util_lookup_group(rules->udev, group);
619 /* grow buffer if needed */
620 if (rules->gids_cur+1 >= rules->gids_max) {
621 struct uid_gid *gids;
624 /* double the buffer size */
625 add = rules->gids_max;
629 gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid));
632 dbg(rules->udev, "extend gids from %u to %u\n", rules->gids_max, rules->gids_max + add);
634 rules->gids_max += add;
636 rules->gids[rules->gids_cur].gid = gid;
637 off = add_string(rules, group);
640 rules->gids[rules->gids_cur].name_off = off;
645 static int import_property_from_string(struct udev_device *dev, char *line)
647 struct udev *udev = udev_device_get_udev(dev);
654 while (isspace(key[0]))
657 /* comment or empty line */
658 if (key[0] == '#' || key[0] == '\0')
661 /* split key/value */
662 val = strchr(key, '=');
669 while (isspace(val[0]))
676 while (isspace(key[len-1]))
680 /* terminate value */
684 while (isspace(val[len-1]))
692 if (val[0] == '"' || val[0] == '\'') {
693 if (val[len-1] != val[0]) {
694 info(udev, "inconsistent quoting: '%s', skip\n", line);
701 dbg(udev, "adding '%s'='%s'\n", key, val);
703 /* handle device, renamed by external tool, returning new path */
704 if (strcmp(key, "DEVPATH") == 0) {
705 char syspath[UTIL_PATH_SIZE];
707 info(udev, "updating devpath from '%s' to '%s'\n",
708 udev_device_get_devpath(dev), val);
709 util_strlcpy(syspath, udev_get_sys_path(udev), sizeof(syspath));
710 util_strlcat(syspath, val, sizeof(syspath));
711 udev_device_set_syspath(dev, syspath);
713 struct udev_list_entry *entry;
715 entry = udev_device_add_property(dev, key, val);
717 udev_list_entry_set_flag(entry, 1);
722 static int import_file_into_properties(struct udev_device *dev, const char *filename)
725 char line[UTIL_LINE_SIZE];
727 f = fopen(filename, "r");
730 while (fgets(line, sizeof(line), f) != NULL)
731 import_property_from_string(dev, line);
736 static int import_program_into_properties(struct udev_device *dev, const char *program)
738 struct udev *udev = udev_device_get_udev(dev);
744 envp = udev_device_get_properties_envp(dev);
745 if (util_run_program(udev, program, envp, result, sizeof(result), &reslen) != 0)
749 while (line != NULL) {
752 pos = strchr(line, '\n');
757 import_property_from_string(dev, line);
763 static int import_parent_into_properties(struct udev_device *dev, const char *filter)
765 struct udev *udev = udev_device_get_udev(dev);
766 struct udev_device *dev_parent;
767 struct udev_list_entry *list_entry;
769 dev_parent = udev_device_get_parent(dev);
770 if (dev_parent == NULL)
773 dbg(udev, "found parent '%s', get the node name\n", udev_device_get_syspath(dev_parent));
774 udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
775 const char *key = udev_list_entry_get_name(list_entry);
776 const char *val = udev_list_entry_get_value(list_entry);
778 if (fnmatch(filter, key, 0) == 0) {
779 struct udev_list_entry *entry;
781 dbg(udev, "import key '%s=%s'\n", key, val);
782 entry = udev_device_add_property(dev, key, val);
784 udev_list_entry_set_flag(entry, 1);
790 #define WAIT_LOOP_PER_SECOND 50
791 static int wait_for_file(struct udev_device *dev, const char *file, int timeout)
793 struct udev *udev = udev_device_get_udev(dev);
794 char filepath[UTIL_PATH_SIZE];
795 char devicepath[UTIL_PATH_SIZE];
797 int loop = timeout * WAIT_LOOP_PER_SECOND;
799 /* a relative path is a device attribute */
800 devicepath[0] = '\0';
801 if (file[0] != '/') {
802 util_strlcpy(devicepath, udev_get_sys_path(udev), sizeof(devicepath));
803 util_strlcat(devicepath, udev_device_get_devpath(dev), sizeof(devicepath));
805 util_strlcpy(filepath, devicepath, sizeof(filepath));
806 util_strlcat(filepath, "/", sizeof(filepath));
807 util_strlcat(filepath, file, sizeof(filepath));
811 dbg(udev, "will wait %i sec for '%s'\n", timeout, file);
814 if (stat(file, &stats) == 0) {
815 info(udev, "file '%s' appeared after %i loops\n", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
818 /* make sure, the device did not disappear in the meantime */
819 if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
820 info(udev, "device disappeared while waiting for '%s'\n", file);
823 info(udev, "wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND);
824 usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND);
826 info(udev, "waiting for '%s' failed\n", file);
830 static int attr_subst_subdir(char *attr, size_t len)
835 pos = strstr(attr, "/*/");
837 char str[UTIL_PATH_SIZE];
841 util_strlcpy(str, &pos[2], sizeof(str));
846 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
849 if (dent->d_name[0] == '.')
851 util_strlcat(attr, dent->d_name, len);
852 util_strlcat(attr, str, len);
853 if (stat(attr, &stats) == 0) {
862 util_strlcat(attr, str, len);
868 static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value)
874 if (linepos == NULL && linepos[0] == '\0')
877 /* skip whitespace */
878 while (isspace(linepos[0]) || linepos[0] == ',')
882 if (linepos[0] == '\0')
888 if (linepos[0] == '\0')
890 if (isspace(linepos[0]))
892 if (linepos[0] == '=')
894 if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
895 if (linepos[1] == '=')
899 /* remember end of key */
902 /* skip whitespace after key */
903 while (isspace(linepos[0]))
905 if (linepos[0] == '\0')
908 /* get operation type */
909 if (linepos[0] == '=' && linepos[1] == '=') {
912 } else if (linepos[0] == '!' && linepos[1] == '=') {
915 } else if (linepos[0] == '+' && linepos[1] == '=') {
918 } else if (linepos[0] == '=') {
921 } else if (linepos[0] == ':' && linepos[1] == '=') {
922 *op = OP_ASSIGN_FINAL;
930 /* skip whitespace after operator */
931 while (isspace(linepos[0]))
933 if (linepos[0] == '\0')
937 if (linepos[0] == '"')
944 temp = strchr(linepos, '"');
949 dbg(udev, "%s '%s'-'%s'\n", operation_str(*op), *key, *value);
951 /* move line to next key */
956 /* extract possible KEY{attr} */
957 static char *get_key_attribute(struct udev *udev, char *str)
962 attr = strchr(str, '{');
965 pos = strchr(attr, '}');
967 err(udev, "missing closing brace for format\n");
971 dbg(udev, "attribute='%s'\n", attr);
977 static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
978 enum operation_type op,
979 const char *value, const void *data)
981 struct token *token = &rule_tmp->token[rule_tmp->token_cur];
982 const char *attr = data;
983 enum string_glob_type glob;
985 memset(token, 0x00, sizeof(struct token));
997 case TK_M_SUBSYSTEMS:
1000 case TK_M_IMPORT_FILE:
1001 case TK_M_IMPORT_PROG:
1002 case TK_M_IMPORT_PARENT:
1010 token->key.value_off = add_string(rule_tmp->rules, value);
1017 token->key.value_off = add_string(rule_tmp->rules, value);
1018 token->key.attr_off = add_string(rule_tmp->rules, attr);
1021 token->key.value_off = add_string(rule_tmp->rules, value);
1023 token->key.mode = *(mode_t *)data;
1025 case TK_A_IGNORE_DEVICE:
1026 case TK_A_STRING_ESCAPE_NONE:
1027 case TK_A_STRING_ESCAPE_REPLACE:
1028 case TK_A_IGNORE_REMOVE:
1029 case TK_A_LAST_RULE:
1032 token->key.value_off = add_string(rule_tmp->rules, value);
1033 token->key.ignore_error = *(int *)data;
1035 case TK_A_INOTIFY_WATCH:
1036 case TK_A_NUM_FAKE_PART:
1037 case TK_A_DEVLINK_PRIO:
1038 token->key.devlink_prio = *(int *)data;
1041 token->key.uid = *(uid_t *)data;
1044 token->key.gid = *(gid_t *)data;
1047 token->key.mode = *(mode_t *)data;
1049 case TK_A_EVENT_TIMEOUT:
1050 token->key.event_timeout = *(int *)data;
1053 case TK_M_PARENTS_MIN:
1054 case TK_M_PARENTS_MAX:
1058 err(rule_tmp->rules->udev, "wrong type %u\n", type);
1063 if (value != NULL) {
1064 if (type < TK_M_MAX) {
1065 /* check if we need to split or call fnmatch() while matching rules */
1069 has_split = (strchr(value, '|') != NULL);
1070 has_glob = (strchr(value, '*') != NULL || strchr(value, '?') != NULL ||
1071 strchr(value, '[') != NULL || strchr(value, ']') != NULL);
1072 if (has_split && has_glob) {
1073 glob = GL_SPLIT_GLOB;
1074 } else if (has_split) {
1076 } else if (has_glob) {
1077 if (strcmp(value, "?*") == 0)
1078 glob = GL_SOMETHING;
1083 /* check if we need to substitute format strings for matching rules */
1084 if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
1089 token->key.type = type;
1091 token->key.glob = glob;
1092 rule_tmp->token_cur++;
1093 if (rule_tmp->token_cur >= ARRAY_SIZE(rule_tmp->token)) {
1094 err(rule_tmp->rules->udev, "temporary rule array too small\n");
1100 static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp)
1103 unsigned int start = 0;
1104 unsigned int end = rule_tmp->token_cur;
1106 for (i = 0; i < rule_tmp->token_cur; i++) {
1107 enum token_type next_val = TK_UNSET;
1108 unsigned int next_idx;
1111 /* find smallest value */
1112 for (j = start; j < end; j++) {
1113 if (rule_tmp->token[j].type == TK_UNSET)
1115 if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
1116 next_val = rule_tmp->token[j].type;
1121 /* add token and mark done */
1122 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
1124 rule_tmp->token[next_idx].type = TK_UNSET;
1127 if (next_idx == start)
1129 if (next_idx+1 == end)
1135 static int add_rule(struct udev_rules *rules, char *line,
1136 const char *filename, unsigned int filename_off, unsigned int lineno)
1142 struct rule_tmp rule_tmp;
1144 memset(&rule_tmp, 0x00, sizeof(struct rule_tmp));
1145 rule_tmp.rules = rules;
1146 rule_tmp.rule.type = TK_RULE;
1147 rule_tmp.rule.rule.filename_off = filename_off;
1148 rule_tmp.rule.rule.filename_line = lineno;
1154 enum operation_type op;
1156 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0)
1159 if (strcasecmp(key, "ACTION") == 0) {
1160 if (op > OP_MATCH_MAX) {
1161 err(rules->udev, "invalid ACTION operation\n");
1164 rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL);
1168 if (strcasecmp(key, "DEVPATH") == 0) {
1169 if (op > OP_MATCH_MAX) {
1170 err(rules->udev, "invalid DEVPATH operation\n");
1173 rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
1177 if (strcasecmp(key, "KERNEL") == 0) {
1178 if (op > OP_MATCH_MAX) {
1179 err(rules->udev, "invalid KERNEL operation\n");
1182 rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL);
1186 if (strcasecmp(key, "SUBSYSTEM") == 0) {
1187 if (op > OP_MATCH_MAX) {
1188 err(rules->udev, "invalid SUBSYSTEM operation\n");
1191 /* bus, class, subsystem events should all be the same */
1192 if (strcmp(value, "subsystem") == 0 ||
1193 strcmp(value, "bus") == 0 ||
1194 strcmp(value, "class") == 0) {
1195 if (strcmp(value, "bus") == 0 || strcmp(value, "class") == 0)
1196 err(rules->udev, "'%s' must be specified as 'subsystem' \n"
1197 "please fix it in %s:%u", value, filename, lineno);
1198 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
1200 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
1204 if (strcasecmp(key, "DRIVER") == 0) {
1205 if (op > OP_MATCH_MAX) {
1206 err(rules->udev, "invalid DRIVER operation\n");
1209 rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL);
1213 if (strncasecmp(key, "ATTR{", sizeof("ATTR{")-1) == 0) {
1214 attr = get_key_attribute(rules->udev, key + sizeof("ATTR")-1);
1216 err(rules->udev, "error parsing ATTR attribute\n");
1219 if (op < OP_MATCH_MAX) {
1220 rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
1222 rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr);
1227 if (strcasecmp(key, "KERNELS") == 0 ||
1228 strcasecmp(key, "ID") == 0) {
1229 if (op > OP_MATCH_MAX) {
1230 err(rules->udev, "invalid KERNELS operation\n");
1233 rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1237 if (strcasecmp(key, "SUBSYSTEMS") == 0 ||
1238 strcasecmp(key, "BUS") == 0) {
1239 if (op > OP_MATCH_MAX) {
1240 err(rules->udev, "invalid SUBSYSTEMS operation\n");
1243 rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1247 if (strcasecmp(key, "DRIVERS") == 0) {
1248 if (op > OP_MATCH_MAX) {
1249 err(rules->udev, "invalid DRIVERS operation\n");
1252 rule_add_key(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
1256 if (strncasecmp(key, "ATTRS{", sizeof("ATTRS{")-1) == 0 ||
1257 strncasecmp(key, "SYSFS{", sizeof("SYSFS{")-1) == 0) {
1258 if (op > OP_MATCH_MAX) {
1259 err(rules->udev, "invalid ATTRS operation\n");
1262 attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
1264 err(rules->udev, "error parsing ATTRS attribute\n");
1267 if (strncmp(attr, "device/", 7) == 0)
1268 err(rules->udev, "the 'device' link may not be available in a future kernel, "
1269 "please fix it in %s:%u", filename, lineno);
1270 else if (strstr(attr, "../") != NULL)
1271 err(rules->udev, "do not reference parent sysfs directories directly, "
1272 "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
1273 rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1277 if (strncasecmp(key, "ENV{", sizeof("ENV{")-1) == 0) {
1278 attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1);
1280 err(rules->udev, "error parsing ENV attribute\n");
1283 if (strncmp(attr, "PHYSDEV", 7) == 0)
1285 if (op < OP_MATCH_MAX) {
1286 if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
1289 if (rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
1295 if (strcasecmp(key, "PROGRAM") == 0) {
1296 rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
1300 if (strcasecmp(key, "RESULT") == 0) {
1301 if (op > OP_MATCH_MAX) {
1302 err(rules->udev, "invalid RESULT operation\n");
1305 rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL);
1309 if (strncasecmp(key, "IMPORT", sizeof("IMPORT")-1) == 0) {
1310 attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1);
1311 if (attr != NULL && strstr(attr, "program")) {
1312 dbg(rules->udev, "IMPORT will be executed\n");
1313 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1314 } else if (attr != NULL && strstr(attr, "file")) {
1315 dbg(rules->udev, "IMPORT will be included as file\n");
1316 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1317 } else if (attr != NULL && strstr(attr, "parent")) {
1318 dbg(rules->udev, "IMPORT will include the parent values\n");
1319 rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
1321 /* figure it out if it is executable */
1322 char file[UTIL_PATH_SIZE];
1324 struct stat statbuf;
1326 util_strlcpy(file, value, sizeof(file));
1327 pos = strchr(file, ' ');
1331 /* allow programs in /lib/udev called without the path */
1332 if (strchr(file, '/') == NULL) {
1333 util_strlcpy(file, UDEV_PREFIX "/lib/udev/", sizeof(file));
1334 util_strlcat(file, value, sizeof(file));
1335 pos = strchr(file, ' ');
1340 dbg(rules->udev, "IMPORT auto mode for '%s'\n", file);
1341 if (!lstat(file, &statbuf) && (statbuf.st_mode & S_IXUSR)) {
1342 dbg(rules->udev, "IMPORT will be executed (autotype)\n");
1343 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1345 dbg(rules->udev, "IMPORT will be included as file (autotype)\n");
1346 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1352 if (strncasecmp(key, "TEST", sizeof("TEST")-1) == 0) {
1355 if (op > OP_MATCH_MAX) {
1356 err(rules->udev, "invalid TEST operation\n");
1359 attr = get_key_attribute(rules->udev, key + sizeof("TEST")-1);
1361 mode = strtol(attr, NULL, 8);
1362 rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode);
1364 rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL);
1369 if (strncasecmp(key, "RUN", sizeof("RUN")-1) == 0) {
1372 attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1);
1373 if (attr != NULL && strstr(attr, "ignore_error"))
1375 rule_add_key(&rule_tmp, TK_A_RUN, op, value, &flag);
1379 if (strcasecmp(key, "WAIT_FOR") == 0 || strcasecmp(key, "WAIT_FOR_SYSFS") == 0) {
1380 rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1385 if (strcasecmp(key, "LABEL") == 0) {
1386 rule_tmp.rule.rule.label_off = add_string(rules, value);
1390 if (strcasecmp(key, "GOTO") == 0) {
1391 rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1395 if (strncasecmp(key, "NAME", sizeof("NAME")-1) == 0) {
1396 if (op < OP_MATCH_MAX) {
1397 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
1399 if (value[0] == '\0')
1400 info(rules->udev, "name empty, node creation suppressed\n");
1401 rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL);
1402 attr = get_key_attribute(rules->udev, key + sizeof("NAME")-1);
1404 if (strstr(attr, "all_partitions") != NULL) {
1405 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1407 dbg(rules->udev, "creation of partition nodes requested\n");
1408 rule_add_key(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1410 if (strstr(attr, "ignore_remove") != NULL) {
1411 dbg(rules->udev, "remove event should be ignored\n");
1412 rule_add_key(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1416 rule_tmp.rule.rule.flags = 1;
1420 if (strcasecmp(key, "SYMLINK") == 0) {
1421 if (op < OP_MATCH_MAX)
1422 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
1424 rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, NULL);
1425 rule_tmp.rule.rule.flags = 1;
1429 if (strcasecmp(key, "OWNER") == 0) {
1433 uid = strtoul(value, &endptr, 10);
1434 if (endptr[0] == '\0') {
1435 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1436 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1437 uid = add_uid(rules, value);
1438 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1439 } else if (rules->resolve_names == 0) {
1440 rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
1442 rule_tmp.rule.rule.flags = 1;
1446 if (strcasecmp(key, "GROUP") == 0) {
1450 gid = strtoul(value, &endptr, 10);
1451 if (endptr[0] == '\0') {
1452 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1453 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1454 gid = add_gid(rules, value);
1455 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1456 } else if (rules->resolve_names == 0) {
1457 rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
1459 rule_tmp.rule.rule.flags = 1;
1463 if (strcasecmp(key, "MODE") == 0) {
1467 mode = strtol(value, &endptr, 8);
1468 if (endptr[0] == '\0')
1469 rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1471 rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
1472 rule_tmp.rule.rule.flags = 1;
1476 if (strcasecmp(key, "OPTIONS") == 0) {
1479 if (strstr(value, "last_rule") != NULL) {
1480 dbg(rules->udev, "last rule to be applied\n");
1481 rule_add_key(&rule_tmp, TK_A_LAST_RULE, 0, NULL, NULL);
1483 if (strstr(value, "ignore_device") != NULL) {
1484 dbg(rules->udev, "device should be ignored\n");
1485 rule_add_key(&rule_tmp, TK_A_IGNORE_DEVICE, 0, NULL, NULL);
1487 if (strstr(value, "ignore_remove") != NULL) {
1488 dbg(rules->udev, "remove event should be ignored\n");
1489 rule_add_key(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1491 pos = strstr(value, "link_priority=");
1493 int prio = atoi(&pos[strlen("link_priority=")]);
1495 rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, 0, NULL, &prio);
1496 dbg(rules->udev, "link priority=%i\n", prio);
1498 pos = strstr(value, "event_timeout=");
1500 int tout = atoi(&pos[strlen("event_timeout=")]);
1502 rule_add_key(&rule_tmp, TK_A_EVENT_TIMEOUT, 0, NULL, &tout);
1503 dbg(rules->udev, "event timout=%i\n", tout);
1505 pos = strstr(value, "string_escape=");
1507 pos = &pos[strlen("string_escape=")];
1508 if (strncmp(pos, "none", strlen("none")) == 0)
1509 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, 0, NULL, NULL);
1510 else if (strncmp(pos, "replace", strlen("replace")) == 0)
1511 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, 0, NULL, NULL);
1513 if (strstr(value, "all_partitions") != NULL) {
1514 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1516 rule_add_key(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1517 dbg(rules->udev, "creation of partition nodes requested\n");
1519 pos = strstr(value, "nowatch");
1523 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, 0, NULL, &off);
1524 dbg(rules->udev, "inotify watch of device disabled\n");
1526 pos = strstr(value, "watch");
1530 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, 0, NULL, &on);
1531 dbg(rules->udev, "inotify watch of device requested\n");
1536 err(rules->udev, "unknown key '%s' in %s:%u\n", key, filename, lineno);
1539 if (physdev && !waitfor)
1540 err(rules->udev, "PHYSDEV* values are deprecated and not available on recent kernels, "
1541 "please fix it in %s:%u\n", filename, lineno);
1543 /* add rule token */
1544 rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur;
1545 if (add_token(rules, &rule_tmp.rule) != 0)
1548 /* add tokens to list, sorted by type */
1549 if (sort_token(rules, &rule_tmp) != 0)
1554 err(rules->udev, "invalid rule '%s:%u'\n", filename, lineno);
1558 static int parse_file(struct udev_rules *rules, const char *filename, unsigned short filename_off)
1561 unsigned int first_token;
1562 char line[UTIL_LINE_SIZE];
1566 info(rules->udev, "reading '%s' as rules file\n", filename);
1568 f = fopen(filename, "r");
1572 first_token = rules->token_cur;
1574 while(fgets(line, sizeof(line), f) != NULL) {
1578 /* skip whitespace */
1581 while (isspace(key[0]))
1592 /* continue reading if backslash+newline is found */
1593 while (line[len-2] == '\\') {
1594 if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1600 if (len+1 >= sizeof(line)) {
1601 err(rules->udev, "line too long '%s':%u, ignored\n", filename, line_nr);
1604 add_rule(rules, key, filename, filename_off, line_nr);
1608 /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1609 for (i = first_token+1; i < rules->token_cur; i++) {
1610 if (rules->tokens[i].type == TK_A_GOTO) {
1611 char *label = &rules->buf[rules->tokens[i].key.value_off];
1614 for (j = i+1; j < rules->token_cur; j++) {
1615 if (rules->tokens[j].type != TK_RULE)
1617 if (rules->tokens[j].rule.label_off == 0)
1619 if (strcmp(label, &rules->buf[rules->tokens[j].rule.label_off]) != 0)
1621 rules->tokens[i].key.rule_goto = j;
1623 if (rules->tokens[i].key.rule_goto == 0)
1624 err(rules->udev, "GOTO '%s' has no matching label in: '%s'\n", label, filename);
1630 static int add_matching_files(struct udev *udev, struct udev_list_node *file_list, const char *dirname, const char *suffix)
1633 char filename[UTIL_PATH_SIZE];
1635 dbg(udev, "open directory '%s'\n", dirname);
1636 dir = opendir(dirname);
1638 info(udev, "unable to open '%s': %m\n", dirname);
1643 struct dirent *dent;
1645 dent = readdir(dir);
1646 if (dent == NULL || dent->d_name[0] == '\0')
1649 if (dent->d_name[0] == '.')
1652 /* look for file matching with specified suffix */
1653 if (suffix != NULL) {
1656 ext = strrchr(dent->d_name, '.');
1659 if (strcmp(ext, suffix) != 0)
1662 dbg(udev, "put file '%s/%s' into list\n", dirname, dent->d_name);
1664 snprintf(filename, sizeof(filename), "%s/%s", dirname, dent->d_name);
1665 filename[sizeof(filename)-1] = '\0';
1666 udev_list_entry_add(udev, file_list, filename, NULL, 1, 1);
1673 struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
1675 struct udev_rules *rules;
1676 struct stat statbuf;
1677 struct udev_list_node file_list;
1678 struct udev_list_entry *file_loop, *file_tmp;
1679 struct token end_token;
1681 rules = malloc(sizeof(struct udev_rules));
1684 memset(rules, 0x00, sizeof(struct udev_rules));
1686 rules->resolve_names = resolve_names;
1687 udev_list_init(&file_list);
1689 /* init token array and string buffer */
1690 rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
1691 if (rules->tokens == NULL)
1693 rules->token_max = PREALLOC_TOKEN;
1695 rules->buf = malloc(PREALLOC_STRBUF);
1696 if (rules->buf == NULL)
1698 rules->buf_max = PREALLOC_STRBUF;
1699 /* offset 0 is always '\0' */
1700 rules->buf[0] = '\0';
1702 dbg(udev, "prealloc %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1703 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1705 rules->trie_nodes = malloc(PREALLOC_TRIE * sizeof(struct trie_node));
1706 if (rules->trie_nodes == NULL)
1708 rules->trie_nodes_max = PREALLOC_TRIE;
1709 /* offset 0 is the trie root, with an empty string */
1710 memset(rules->trie_nodes, 0x00, sizeof(struct trie_node));
1711 rules->trie_nodes_cur = 1;
1713 if (udev_get_rules_path(udev) != NULL) {
1714 /* custom rules location for testing */
1715 add_matching_files(udev, &file_list, udev_get_rules_path(udev), ".rules");
1717 char filename[PATH_MAX];
1718 struct udev_list_node sort_list;
1719 struct udev_list_entry *sort_loop, *sort_tmp;
1721 /* read user/custom rules */
1722 add_matching_files(udev, &file_list, SYSCONFDIR "/udev/rules.d", ".rules");
1724 /* read dynamic/temporary rules */
1725 util_strlcpy(filename, udev_get_dev_path(udev), sizeof(filename));
1726 util_strlcat(filename, "/.udev/rules.d", sizeof(filename));
1727 if (stat(filename, &statbuf) != 0) {
1728 util_create_path(udev, filename);
1729 udev_selinux_setfscreatecon(udev, filename, S_IFDIR|0755);
1730 mkdir(filename, 0755);
1731 udev_selinux_resetfscreatecon(udev);
1733 udev_list_init(&sort_list);
1734 add_matching_files(udev, &sort_list, filename, ".rules");
1736 /* read default rules */
1737 add_matching_files(udev, &sort_list, UDEV_PREFIX "/lib/udev/rules.d", ".rules");
1739 /* sort all rules files by basename into list of files */
1740 udev_list_entry_foreach_safe(sort_loop, sort_tmp, udev_list_get_entry(&sort_list)) {
1741 const char *sort_name = udev_list_entry_get_name(sort_loop);
1742 const char *sort_base = strrchr(sort_name, '/');
1744 if (sort_base == NULL)
1746 /* sort entry into existing list */
1747 udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1748 const char *file_name = udev_list_entry_get_name(file_loop);
1749 const char *file_base = strrchr(file_name, '/');
1751 if (file_base == NULL)
1753 if (strcmp(file_base, sort_base) == 0) {
1754 info(udev, "rule file basename '%s' already added, ignoring '%s'\n",
1755 file_name, sort_name);
1756 udev_list_entry_delete(sort_loop);
1760 if (strcmp(file_base, sort_base) > 0) {
1761 /* found later file, insert before */
1762 udev_list_entry_remove(sort_loop);
1763 udev_list_entry_insert_before(sort_loop, file_loop);
1768 /* current file already handled */
1769 if (sort_loop == NULL)
1771 /* no later file, append to end of list */
1772 udev_list_entry_remove(sort_loop);
1773 udev_list_entry_append(sort_loop, &file_list);
1777 /* add all filenames to the string buffer */
1778 udev_list_entry_foreach(file_loop, udev_list_get_entry(&file_list)) {
1779 const char *filename = udev_list_entry_get_name(file_loop);
1780 unsigned int filename_off;
1782 filename_off = add_string(rules, filename);
1783 /* the offset in the rule is limited to unsigned short */
1784 if (filename_off < USHRT_MAX)
1785 udev_list_entry_set_flag(file_loop, filename_off);
1788 /* parse list of files */
1789 udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1790 const char *filename = udev_list_entry_get_name(file_loop);
1791 unsigned int filename_off = udev_list_entry_get_flag(file_loop);
1793 if (stat(filename, &statbuf) == 0 && statbuf.st_size > 0)
1794 parse_file(rules, filename, filename_off);
1796 info(udev, "can not read '%s'\n", filename);
1797 udev_list_entry_delete(file_loop);
1800 memset(&end_token, 0x00, sizeof(struct token));
1801 end_token.type = TK_END;
1802 add_token(rules, &end_token);
1804 /* shrink allocated token and string buffer */
1805 if (rules->token_cur < rules->token_max) {
1806 struct token *tokens;
1808 tokens = realloc(rules->tokens, rules->token_cur * sizeof(struct token));
1809 if (tokens != NULL || rules->token_cur == 0) {
1810 rules->tokens = tokens;
1811 rules->token_max = rules->token_cur;
1814 if (rules->buf_cur < rules->buf_max) {
1817 buf = realloc(rules->buf, rules->buf_cur);
1818 if (buf != NULL || rules->buf_cur == 0) {
1820 rules->buf_max = rules->buf_cur;
1823 info(udev, "rules use %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1824 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1825 info(udev, "temporary index used %zu bytes (%u * %zu bytes)\n",
1826 rules->trie_nodes_cur * sizeof(struct trie_node),
1827 rules->trie_nodes_cur, sizeof(struct trie_node));
1830 free(rules->trie_nodes);
1831 rules->trie_nodes = NULL;
1832 rules->trie_nodes_cur = 0;
1833 rules->trie_nodes_max = 0;
1835 /* cleanup uid/gid cache */
1838 rules->uids_cur = 0;
1839 rules->uids_max = 0;
1842 rules->gids_cur = 0;
1843 rules->gids_max = 0;
1849 void udev_rules_unref(struct udev_rules *rules)
1853 free(rules->tokens);
1855 free(rules->trie_nodes);
1861 static int match_key(struct udev_rules *rules, struct token *token, const char *val)
1863 char *key_value = &rules->buf[token->key.value_off];
1870 switch (token->key.glob) {
1872 match = (strcmp(key_value, val) == 0);
1875 match = (fnmatch(key_value, val, 0) == 0);
1882 split = &rules->buf[token->key.value_off];
1887 next = strchr(split, '|');
1889 size_t matchlen = (size_t)(next - split);
1891 match = (matchlen == len && strncmp(split, val, matchlen) == 0);
1895 match = (strcmp(split, val) == 0);
1904 char value[UTIL_PATH_SIZE];
1906 util_strlcpy(value, &rules->buf[token->key.value_off], sizeof(value));
1908 while (key_value != NULL) {
1909 pos = strchr(key_value, '|');
1914 dbg(rules->udev, "match %s '%s' <-> '%s'\n", token_str(token->type), key_value, val);
1915 match = (fnmatch(key_value, val, 0) == 0);
1923 match = (val[0] != '\0');
1930 if (match && (token->key.op == OP_MATCH)) {
1931 dbg(rules->udev, "%s is true (matching value)\n", token_str(token->type));
1934 if (!match && (token->key.op == OP_NOMATCH)) {
1935 dbg(rules->udev, "%s is true (non-matching value)\n", token_str(token->type));
1938 dbg(rules->udev, "%s is not true\n", token_str(token->type));
1942 static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur)
1944 const char *key_name = &rules->buf[cur->key.attr_off];
1945 const char *key_value = &rules->buf[cur->key.value_off];
1946 char value[UTIL_NAME_SIZE];
1950 if (key_name[0] == '[') {
1951 char attr[UTIL_PATH_SIZE];
1953 util_strlcpy(attr, key_name, sizeof(attr));
1954 util_resolve_subsys_kernel(event->udev, attr, value, sizeof(value), 1);
1956 if (value[0] == '\0') {
1959 val = udev_device_get_sysattr_value(dev, key_name);
1962 util_strlcpy(value, val, sizeof(value));
1965 /* strip trailing whitespace of value, if not asked to match for it */
1966 len = strlen(key_value);
1967 if (len > 0 && !isspace(key_value[len-1])) {
1968 len = strlen(value);
1969 while (len > 0 && isspace(value[--len]))
1971 dbg(rules->udev, "removed trailing whitespace from '%s'\n", value);
1973 return match_key(rules, cur, value);
1982 int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event)
1986 enum escape_type esc = ESCAPE_UNSET;
1989 if (rules->tokens == NULL)
1992 can_set_name = ((strcmp(udev_device_get_action(event->dev), "add") == 0 ||
1993 strcmp(udev_device_get_action(event->dev), "change") == 0) &&
1994 (major(udev_device_get_devnum(event->dev)) > 0 ||
1995 strcmp(udev_device_get_subsystem(event->dev), "net") == 0));
1997 /* loop through token list, match, run actions or forward to next rule */
1998 cur = &rules->tokens[0];
2001 dump_token(rules, cur);
2002 switch (cur->type) {
2006 /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
2007 if (!can_set_name && rule->rule.flags)
2012 if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
2016 if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
2020 if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
2025 size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
2026 struct udev_list_entry *list_entry;
2029 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
2030 const char *devlink;
2032 devlink = &udev_list_entry_get_name(list_entry)[devlen];
2033 if (match_key(rules, cur, devlink) == 0) {
2043 if (match_key(rules, cur, event->name) != 0)
2048 const char *key_name = &rules->buf[cur->key.attr_off];
2051 value = udev_device_get_property_value(event->dev, key_name);
2052 if (value == NULL) {
2053 dbg(event->udev, "ENV{%s} is not set, treat as empty\n", key_name);
2056 if (match_key(rules, cur, value))
2060 case TK_M_SUBSYSTEM:
2061 if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
2065 if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
2070 char filename[UTIL_PATH_SIZE];
2073 util_strlcpy(filename, &rules->buf[cur->key.value_off], sizeof(filename));
2074 udev_event_apply_format(event, filename, sizeof(filename));
2075 found = (wait_for_file(event->dev, filename, 10) == 0);
2076 if (!found && (cur->key.op != OP_NOMATCH))
2081 if (match_attr(rules, event->dev, event, cur) != 0)
2085 case TK_M_SUBSYSTEMS:
2091 /* get whole sequence of parent matches */
2093 while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX)
2096 /* loop over parents */
2097 event->dev_parent = event->dev;
2101 dbg(event->udev, "parent: '%s'\n", udev_device_get_syspath(event->dev_parent));
2102 /* loop over sequence of parent match keys */
2103 for (key = cur; key < next; key++ ) {
2104 dump_token(rules, key);
2107 if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
2110 case TK_M_SUBSYSTEMS:
2111 if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
2115 if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
2119 if (match_attr(rules, event->dev_parent, event, key) != 0)
2125 dbg(event->udev, "parent key matched\n");
2127 dbg(event->udev, "all parent keys matched\n");
2128 /* all keys matched */
2132 event->dev_parent = udev_device_get_parent(event->dev_parent);
2133 if (event->dev_parent == NULL)
2136 /* move behind our sequence of parent match keys */
2142 char filename[UTIL_PATH_SIZE];
2143 struct stat statbuf;
2146 util_strlcpy(filename, &rules->buf[cur->key.value_off], sizeof(filename));
2147 udev_event_apply_format(event, filename, sizeof(filename));
2148 if (util_resolve_subsys_kernel(event->udev, NULL, filename, sizeof(filename), 0) != 0)
2149 if (filename[0] != '/') {
2150 char tmp[UTIL_PATH_SIZE];
2152 util_strlcpy(tmp, udev_device_get_syspath(event->dev), sizeof(tmp));
2153 util_strlcat(tmp, "/", sizeof(tmp));
2154 util_strlcat(tmp, filename, sizeof(tmp));
2155 util_strlcpy(filename, tmp, sizeof(filename));
2158 attr_subst_subdir(filename, sizeof(filename));
2160 match = (stat(filename, &statbuf) == 0);
2161 dbg(event->udev, "'%s' %s", filename, match ? "exists\n" : "does not exist\n");
2162 if (match && cur->key.mode > 0) {
2163 match = ((statbuf.st_mode & cur->key.mode) > 0);
2164 dbg(event->udev, "'%s' has mode=%#o and %s %#o\n", filename, statbuf.st_mode,
2165 match ? "matches" : "does not match", cur->key.mode);
2167 if (match && cur->key.op == OP_NOMATCH)
2169 if (!match && cur->key.op == OP_MATCH)
2175 char program[UTIL_PATH_SIZE];
2177 char result[UTIL_PATH_SIZE];
2179 free(event->program_result);
2180 event->program_result = NULL;
2181 util_strlcpy(program, &rules->buf[cur->key.value_off], sizeof(program));
2182 udev_event_apply_format(event, program, sizeof(program));
2183 envp = udev_device_get_properties_envp(event->dev);
2184 info(event->udev, "PROGRAM '%s' %s:%u\n",
2186 &rules->buf[rule->rule.filename_off],
2187 rule->rule.filename_line);
2188 if (util_run_program(event->udev, program, envp, result, sizeof(result), NULL) != 0) {
2189 if (cur->key.op != OP_NOMATCH)
2194 util_remove_trailing_chars(result, '\n');
2195 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2196 count = udev_util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
2198 info(event->udev, "%i character(s) replaced\n" , count);
2200 event->program_result = strdup(result);
2201 dbg(event->udev, "storing result '%s'\n", event->program_result);
2202 if (cur->key.op == OP_NOMATCH)
2207 case TK_M_IMPORT_FILE:
2209 char import[UTIL_PATH_SIZE];
2211 util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));
2212 udev_event_apply_format(event, import, sizeof(import));
2213 if (import_file_into_properties(event->dev, import) != 0)
2214 if (cur->key.op != OP_NOMATCH)
2218 case TK_M_IMPORT_PROG:
2220 char import[UTIL_PATH_SIZE];
2222 util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));
2223 udev_event_apply_format(event, import, sizeof(import));
2224 info(event->udev, "IMPORT '%s' %s:%u\n",
2226 &rules->buf[rule->rule.filename_off],
2227 rule->rule.filename_line);
2228 if (import_program_into_properties(event->dev, import) != 0)
2229 if (cur->key.op != OP_NOMATCH)
2233 case TK_M_IMPORT_PARENT:
2235 char import[UTIL_PATH_SIZE];
2237 util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));
2238 udev_event_apply_format(event, import, sizeof(import));
2239 if (import_parent_into_properties(event->dev, import) != 0)
2240 if (cur->key.op != OP_NOMATCH)
2245 if (match_key(rules, cur, event->program_result) != 0)
2249 case TK_A_IGNORE_DEVICE:
2250 event->ignore_device = 1;
2253 case TK_A_STRING_ESCAPE_NONE:
2256 case TK_A_STRING_ESCAPE_REPLACE:
2257 esc = ESCAPE_REPLACE;
2259 case TK_A_NUM_FAKE_PART:
2260 if (strcmp(udev_device_get_subsystem(event->dev), "block") != 0)
2262 if (udev_device_get_sysnum(event->dev) != NULL)
2264 udev_device_set_num_fake_partitions(event->dev, cur->key.num_fake_part);
2266 case TK_A_INOTIFY_WATCH:
2267 event->inotify_watch = cur->key.watch;
2269 case TK_A_DEVLINK_PRIO:
2270 udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
2274 char owner[UTIL_NAME_SIZE];
2276 if (event->owner_final)
2278 if (cur->key.op == OP_ASSIGN_FINAL)
2279 event->owner_final = 1;
2280 util_strlcpy(owner, &rules->buf[cur->key.value_off], sizeof(owner));
2281 udev_event_apply_format(event, owner, sizeof(owner));
2282 event->uid = util_lookup_user(event->udev, owner);
2283 info(event->udev, "OWNER %u %s:%u\n",
2285 &rules->buf[rule->rule.filename_off],
2286 rule->rule.filename_line);
2291 char group[UTIL_NAME_SIZE];
2293 if (event->group_final)
2295 if (cur->key.op == OP_ASSIGN_FINAL)
2296 event->group_final = 1;
2297 util_strlcpy(group, &rules->buf[cur->key.value_off], sizeof(group));
2298 udev_event_apply_format(event, group, sizeof(group));
2299 event->gid = util_lookup_group(event->udev, group);
2300 info(event->udev, "GROUP %u %s:%u\n",
2302 &rules->buf[rule->rule.filename_off],
2303 rule->rule.filename_line);
2308 char mode[UTIL_NAME_SIZE];
2311 if (event->mode_final)
2313 if (cur->key.op == OP_ASSIGN_FINAL)
2314 event->mode_final = 1;
2315 util_strlcpy(mode, &rules->buf[cur->key.value_off], sizeof(mode));
2316 udev_event_apply_format(event, mode, sizeof(mode));
2317 event->mode = strtol(mode, &endptr, 8);
2318 if (endptr[0] != '\0') {
2319 err(event->udev, "invalide mode '%s' set default mode 0660\n", mode);
2322 info(event->udev, "MODE %#o %s:%u\n",
2324 &rules->buf[rule->rule.filename_off],
2325 rule->rule.filename_line);
2329 if (event->owner_final)
2331 if (cur->key.op == OP_ASSIGN_FINAL)
2332 event->owner_final = 1;
2333 event->uid = cur->key.uid;
2334 info(event->udev, "OWNER %u %s:%u\n",
2336 &rules->buf[rule->rule.filename_off],
2337 rule->rule.filename_line);
2340 if (event->group_final)
2342 if (cur->key.op == OP_ASSIGN_FINAL)
2343 event->group_final = 1;
2344 event->gid = cur->key.gid;
2345 info(event->udev, "GROUP %u %s:%u\n",
2347 &rules->buf[rule->rule.filename_off],
2348 rule->rule.filename_line);
2351 if (event->mode_final)
2353 if (cur->key.op == OP_ASSIGN_FINAL)
2354 event->mode_final = 1;
2355 event->mode = cur->key.mode;
2356 info(event->udev, "MODE %#o %s:%u\n",
2358 &rules->buf[rule->rule.filename_off],
2359 rule->rule.filename_line);
2363 const char *name = &rules->buf[cur->key.attr_off];
2364 char *value = &rules->buf[cur->key.value_off];
2366 if (value[0] != '\0') {
2367 char temp_value[UTIL_NAME_SIZE];
2368 struct udev_list_entry *entry;
2370 util_strlcpy(temp_value, value, sizeof(temp_value));
2371 udev_event_apply_format(event, temp_value, sizeof(temp_value));
2372 entry = udev_device_add_property(event->dev, name, temp_value);
2374 udev_list_entry_set_flag(entry, 1);
2376 udev_device_add_property(event->dev, name, NULL);
2382 const char *name = &rules->buf[cur->key.value_off];
2383 char name_str[UTIL_PATH_SIZE];
2386 if (event->name_final)
2388 if (cur->key.op == OP_ASSIGN_FINAL)
2389 event->name_final = 1;
2390 util_strlcpy(name_str, name, sizeof(name_str));
2391 udev_event_apply_format(event, name_str, sizeof(name_str));
2392 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2393 count = udev_util_replace_chars(name_str, "/");
2395 info(event->udev, "%i character(s) replaced\n", count);
2398 event->name = strdup(name_str);
2399 info(event->udev, "NAME '%s' %s:%u\n",
2401 &rules->buf[rule->rule.filename_off],
2402 rule->rule.filename_line);
2407 char temp[UTIL_PATH_SIZE];
2408 char filename[UTIL_PATH_SIZE];
2412 if (event->devlink_final)
2414 if (major(udev_device_get_devnum(event->dev)) == 0)
2416 if (cur->key.op == OP_ASSIGN_FINAL)
2417 event->devlink_final = 1;
2418 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2419 udev_device_cleanup_devlinks_list(event->dev);
2421 /* allow multiple symlinks separated by spaces */
2422 util_strlcpy(temp, &rules->buf[cur->key.value_off], sizeof(temp));
2423 udev_event_apply_format(event, temp, sizeof(temp));
2424 if (esc == ESCAPE_UNSET)
2425 count = udev_util_replace_chars(temp, "/ ");
2426 else if (esc == ESCAPE_REPLACE)
2427 count = udev_util_replace_chars(temp, "/");
2429 info(event->udev, "%i character(s) replaced\n" , count);
2430 dbg(event->udev, "rule applied, added symlink(s) '%s'\n", temp);
2432 while (isspace(pos[0]))
2434 next = strchr(pos, ' ');
2437 info(event->udev, "LINK '%s' %s:%u\n",
2439 &rules->buf[rule->rule.filename_off],
2440 rule->rule.filename_line);
2441 util_strlcpy(filename, udev_get_dev_path(event->udev), sizeof(filename));
2442 util_strlcat(filename, "/", sizeof(filename));
2443 util_strlcat(filename, pos, sizeof(filename));
2444 udev_device_add_devlink(event->dev, filename);
2445 while (isspace(next[1]))
2448 next = strchr(pos, ' ');
2450 if (pos[0] != '\0') {
2451 info(event->udev, "LINK '%s' %s:%u\n",
2453 &rules->buf[rule->rule.filename_off],
2454 rule->rule.filename_line);
2455 util_strlcpy(filename, udev_get_dev_path(event->udev), sizeof(filename));
2456 util_strlcat(filename, "/", sizeof(filename));
2457 util_strlcat(filename, pos, sizeof(filename));
2458 udev_device_add_devlink(event->dev, filename);
2462 case TK_A_EVENT_TIMEOUT:
2463 udev_device_set_event_timeout(event->dev, cur->key.event_timeout);
2465 case TK_A_IGNORE_REMOVE:
2466 udev_device_set_ignore_remove(event->dev, 1);
2470 const char *key_name = &rules->buf[cur->key.attr_off];
2471 char attr[UTIL_PATH_SIZE];
2472 char value[UTIL_NAME_SIZE];
2475 util_strlcpy(attr, key_name, sizeof(attr));
2476 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0) {
2477 util_strlcpy(attr, udev_device_get_syspath(event->dev), sizeof(attr));
2478 util_strlcat(attr, "/", sizeof(attr));
2479 util_strlcat(attr, key_name, sizeof(attr));
2482 attr_subst_subdir(attr, sizeof(attr));
2484 util_strlcpy(value, &rules->buf[cur->key.value_off], sizeof(value));
2485 udev_event_apply_format(event, value, sizeof(value));
2486 info(event->udev, "ATTR '%s' writing '%s' %s:%u\n", attr, value,
2487 &rules->buf[rule->rule.filename_off],
2488 rule->rule.filename_line);
2489 f = fopen(attr, "w");
2491 if (fprintf(f, "%s", value) <= 0)
2492 err(event->udev, "error writing ATTR{%s}: %m\n", attr);
2495 err(event->udev, "error opening ATTR{%s} for writing: %m\n", attr);
2501 struct udev_list_entry *list_entry;
2503 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2504 udev_list_cleanup_entries(event->udev, &event->run_list);
2505 info(event->udev, "RUN '%s' %s:%u\n",
2506 &rules->buf[cur->key.value_off],
2507 &rules->buf[rule->rule.filename_off],
2508 rule->rule.filename_line);
2509 list_entry = udev_list_entry_add(event->udev, &event->run_list,
2510 &rules->buf[cur->key.value_off], NULL, 1, 0);
2511 if (cur->key.ignore_error)
2512 udev_list_entry_set_flag(list_entry, 1);
2516 cur = &rules->tokens[cur->key.rule_goto];
2518 case TK_A_LAST_RULE:
2522 case TK_M_PARENTS_MIN:
2523 case TK_M_PARENTS_MAX:
2526 err(rules->udev, "wrong type %u\n", cur->type);
2533 /* fast-forward to next rule */
2534 cur = rule + rule->rule.token_count;
2535 dbg(rules->udev, "forward to rule: %u\n",
2536 (unsigned int) (cur - rules->tokens));