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_NUM_FAKE_PART, /* int */
144 TK_A_DEVLINK_PRIO, /* int */
145 TK_A_OWNER, /* val */
146 TK_A_GROUP, /* val */
148 TK_A_OWNER_ID, /* uid_t */
149 TK_A_GROUP_ID, /* gid_t */
150 TK_A_MODE_ID, /* mode_t */
151 TK_A_ENV, /* val, attr */
153 TK_A_DEVLINK, /* val */
154 TK_A_EVENT_TIMEOUT, /* int */
156 TK_A_ATTR, /* val, attr */
157 TK_A_RUN, /* val, bool */
158 TK_A_GOTO, /* size_t */
164 /* we try to pack stuff in a way that we take only 12 bytes per token */
167 unsigned char type; /* same as in rule and key */
171 unsigned short token_count;
172 unsigned int label_off;
173 unsigned short filename_off;
174 unsigned short filename_line;
181 unsigned int value_off;
183 unsigned int attr_off;
186 unsigned int rule_goto;
200 struct udev_rules *rules;
202 struct token token[MAX_TK];
203 unsigned int token_cur;
207 static const char *operation_str(enum operation_type type)
209 static const char *operation_strs[] = {
210 [OP_UNSET] = "UNSET",
211 [OP_MATCH] = "match",
212 [OP_NOMATCH] = "nomatch",
213 [OP_MATCH_MAX] = "MATCH_MAX",
216 [OP_ASSIGN] = "assign",
217 [OP_ASSIGN_FINAL] = "assign-final",
220 return operation_strs[type];
223 static const char *string_glob_str(enum string_glob_type type)
225 static const char *string_glob_strs[] = {
226 [GL_UNSET] = "UNSET",
227 [GL_PLAIN] = "plain",
229 [GL_SPLIT] = "split",
230 [GL_SPLIT_GLOB] = "split-glob",
231 [GL_SOMETHING] = "split-glob",
232 [GL_FORMAT] = "format",
235 return string_glob_strs[type];
238 static const char *token_str(enum token_type type)
240 static const char *token_strs[] = {
241 [TK_UNSET] = "UNSET",
244 [TK_M_ACTION] = "M ACTION",
245 [TK_M_DEVPATH] = "M DEVPATH",
246 [TK_M_KERNEL] = "M KERNEL",
247 [TK_M_DEVLINK] = "M DEVLINK",
248 [TK_M_NAME] = "M NAME",
249 [TK_M_ENV] = "M ENV",
250 [TK_M_SUBSYSTEM] = "M SUBSYSTEM",
251 [TK_M_DRIVER] = "M DRIVER",
252 [TK_M_WAITFOR] = "M WAITFOR",
253 [TK_M_ATTR] = "M ATTR",
255 [TK_M_PARENTS_MIN] = "M PARENTS_MIN",
256 [TK_M_KERNELS] = "M KERNELS",
257 [TK_M_SUBSYSTEMS] = "M SUBSYSTEMS",
258 [TK_M_DRIVERS] = "M DRIVERS",
259 [TK_M_ATTRS] = "M ATTRS",
260 [TK_M_PARENTS_MAX] = "M PARENTS_MAX",
262 [TK_M_TEST] = "M TEST",
263 [TK_M_PROGRAM] = "M PROGRAM",
264 [TK_M_IMPORT_FILE] = "M IMPORT_FILE",
265 [TK_M_IMPORT_PROG] = "M IMPORT_PROG",
266 [TK_M_IMPORT_PARENT] = "M MPORT_PARENT",
267 [TK_M_RESULT] = "M RESULT",
268 [TK_M_MAX] = "M MAX",
270 [TK_A_IGNORE_DEVICE] = "A IGNORE_DEVICE",
271 [TK_A_STRING_ESCAPE_NONE] = "A STRING_ESCAPE_NONE",
272 [TK_A_STRING_ESCAPE_REPLACE] = "A STRING_ESCAPE_REPLACE",
273 [TK_A_NUM_FAKE_PART] = "A NUM_FAKE_PART",
274 [TK_A_DEVLINK_PRIO] = "A DEVLINK_PRIO",
275 [TK_A_OWNER] = "A OWNER",
276 [TK_A_GROUP] = "A GROUP",
277 [TK_A_MODE] = "A MODE",
278 [TK_A_OWNER_ID] = "A OWNER_ID",
279 [TK_A_GROUP_ID] = "A GROUP_ID",
280 [TK_A_MODE_ID] = "A MODE_ID",
281 [TK_A_ENV] = "A ENV",
282 [TK_A_NAME] = "A NAME",
283 [TK_A_DEVLINK] = "A DEVLINK",
284 [TK_A_EVENT_TIMEOUT] = "A EVENT_TIMEOUT",
285 [TK_A_IGNORE_REMOVE] = "A IGNORE_REMOVE",
286 [TK_A_ATTR] = "A ATTR",
287 [TK_A_RUN] = "A RUN",
288 [TK_A_GOTO] = "A GOTO",
289 [TK_A_LAST_RULE] = "A LAST_RULE",
294 return token_strs[type];
297 static void dump_token(struct udev_rules *rules, struct token *token)
299 enum token_type type = token->type;
300 enum operation_type op = token->key.op;
301 enum string_glob_type glob = token->key.glob;
302 const char *value = &rules->buf[token->key.value_off];
303 const char *attr = &rules->buf[token->key.attr_off];
308 const char *tks_ptr = (char *)rules->tokens;
309 const char *tk_ptr = (char *)token;
310 unsigned int idx = (tk_ptr - tks_ptr) / sizeof(struct token);
312 dbg(rules->udev, "* RULE %s:%u, token: %u, count: %u, label: '%s', flags: 0x%02x\n",
313 &rules->buf[token->rule.filename_off], token->rule.filename_line,
314 idx, token->rule.token_count,
315 &rules->buf[token->rule.label_off],
328 case TK_M_SUBSYSTEMS:
331 case TK_M_IMPORT_FILE:
332 case TK_M_IMPORT_PROG:
333 case TK_M_IMPORT_PARENT:
341 dbg(rules->udev, "%s %s '%s'(%s)\n",
342 token_str(type), operation_str(op), value, string_glob_str(glob));
349 dbg(rules->udev, "%s %s '%s' '%s'(%s)\n",
350 token_str(type), operation_str(op), attr, value, string_glob_str(glob));
352 case TK_A_IGNORE_DEVICE:
353 case TK_A_STRING_ESCAPE_NONE:
354 case TK_A_STRING_ESCAPE_REPLACE:
356 case TK_A_IGNORE_REMOVE:
357 dbg(rules->udev, "%s\n", token_str(type));
360 dbg(rules->udev, "%s %s '%s'(%s) %#o\n",
361 token_str(type), operation_str(op), value, string_glob_str(glob), token->key.mode);
363 case TK_A_NUM_FAKE_PART:
364 dbg(rules->udev, "%s %u\n", token_str(type), token->key.num_fake_part);
366 case TK_A_DEVLINK_PRIO:
367 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.devlink_prio);
370 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.uid);
373 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.gid);
376 dbg(rules->udev, "%s %s %#o\n", token_str(type), operation_str(op), token->key.mode);
378 case TK_A_EVENT_TIMEOUT:
379 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.event_timeout);
382 dbg(rules->udev, "%s '%s' %u\n", token_str(type), value, token->key.rule_goto);
385 dbg(rules->udev, "* %s\n", token_str(type));
387 case TK_M_PARENTS_MIN:
388 case TK_M_PARENTS_MAX:
391 dbg(rules->udev, "unknown type %u\n", type);
396 static void dump_rules(struct udev_rules *rules)
400 dbg(rules->udev, "dumping %u (%zu bytes) tokens, %u (%zu bytes) strings\n",
402 rules->token_cur * sizeof(struct token),
405 for(i = 0; i < rules->token_cur; i++)
406 dump_token(rules, &rules->tokens[i]);
409 static inline const char *operation_str(enum operation_type type) { return NULL; }
410 static inline const char *token_str(enum token_type type) { return NULL; }
411 static inline void dump_token(struct udev_rules *rules, struct token *token) {}
412 static inline void dump_rules(struct udev_rules *rules) {}
415 static int add_new_string(struct udev_rules *rules, const char *str, size_t bytes)
419 /* grow buffer if needed */
420 if (rules->buf_cur + bytes+1 >= rules->buf_max) {
424 /* double the buffer size */
425 add = rules->buf_max;
429 buf = realloc(rules->buf, rules->buf_max + add);
432 dbg(rules->udev, "extend buffer from %zu to %zu\n", rules->buf_max, rules->buf_max + add);
434 rules->buf_max += add;
436 off = rules->buf_cur;
437 memcpy(&rules->buf[rules->buf_cur], str, bytes);
438 rules->buf_cur += bytes;
443 static int add_string(struct udev_rules *rules, const char *str)
445 unsigned int node_idx;
446 struct trie_node *new_node;
447 unsigned int new_node_idx;
452 struct trie_node *parent;
454 /* walk trie, start from last character of str to find matching tails */
458 for (depth = 0; depth <= len; depth++) {
459 struct trie_node *node;
460 unsigned int child_idx;
462 node = &rules->trie_nodes[node_idx];
463 off = node->value_off + node->value_len - len;
465 /* match against current node */
466 if (depth == len || (node->value_len >= len && memcmp(&rules->buf[off], str, len) == 0))
469 /* lookup child node */
470 key = str[len - 1 - depth];
471 child_idx = node->child_idx;
472 while (child_idx > 0) {
473 struct trie_node *child;
475 child = &rules->trie_nodes[child_idx];
476 if (child->key == key)
478 child_idx = child->next_child_idx;
482 node_idx = child_idx;
485 /* string not found, add it */
486 off = add_new_string(rules, str, len + 1);
488 /* grow trie nodes if needed */
489 if (rules->trie_nodes_cur >= rules->trie_nodes_max) {
490 struct trie_node *nodes;
493 /* double the buffer size */
494 add = rules->trie_nodes_max;
498 nodes = realloc(rules->trie_nodes, (rules->trie_nodes_max + add) * sizeof(struct trie_node));
501 dbg(rules->udev, "extend trie nodes from %u to %u\n",
502 rules->trie_nodes_max, rules->trie_nodes_max + add);
503 rules->trie_nodes = nodes;
504 rules->trie_nodes_max += add;
508 new_node_idx = rules->trie_nodes_cur;
509 rules->trie_nodes_cur++;
510 new_node = &rules->trie_nodes[new_node_idx];
511 memset(new_node, 0x00, sizeof(struct trie_node));
512 new_node->value_off = off;
513 new_node->value_len = len;
516 /* join the parent's child list */
517 parent = &rules->trie_nodes[node_idx];
518 if (parent->child_idx == 0) {
519 parent->child_idx = new_node_idx;
521 struct trie_node *last_child;
523 last_child = &rules->trie_nodes[parent->last_child_idx];
524 last_child->next_child_idx = new_node_idx;
526 parent->last_child_idx = new_node_idx;
530 static int add_token(struct udev_rules *rules, struct token *token)
532 /* grow buffer if needed */
533 if (rules->token_cur+1 >= rules->token_max) {
534 struct token *tokens;
537 /* double the buffer size */
538 add = rules->token_max;
542 tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
545 dbg(rules->udev, "extend tokens from %u to %u\n", rules->token_max, rules->token_max + add);
546 rules->tokens = tokens;
547 rules->token_max += add;
549 memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
554 static uid_t add_uid(struct udev_rules *rules, const char *owner)
560 /* lookup, if we know it already */
561 for (i = 0; i < rules->uids_cur; i++) {
562 off = rules->uids[i].name_off;
563 if (strcmp(&rules->buf[off], owner) == 0) {
564 uid = rules->uids[i].uid;
565 dbg(rules->udev, "return existing %u for '%s'\n", uid, owner);
569 uid = util_lookup_user(rules->udev, owner);
571 /* grow buffer if needed */
572 if (rules->uids_cur+1 >= rules->uids_max) {
573 struct uid_gid *uids;
576 /* double the buffer size */
577 add = rules->uids_max;
581 uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
584 dbg(rules->udev, "extend uids from %u to %u\n", rules->uids_max, rules->uids_max + add);
586 rules->uids_max += add;
588 rules->uids[rules->uids_cur].uid = uid;
589 off = add_string(rules, owner);
592 rules->uids[rules->uids_cur].name_off = off;
597 static gid_t add_gid(struct udev_rules *rules, const char *group)
603 /* lookup, if we know it already */
604 for (i = 0; i < rules->gids_cur; i++) {
605 off = rules->gids[i].name_off;
606 if (strcmp(&rules->buf[off], group) == 0) {
607 gid = rules->gids[i].gid;
608 dbg(rules->udev, "return existing %u for '%s'\n", gid, group);
612 gid = util_lookup_group(rules->udev, group);
614 /* grow buffer if needed */
615 if (rules->gids_cur+1 >= rules->gids_max) {
616 struct uid_gid *gids;
619 /* double the buffer size */
620 add = rules->gids_max;
624 gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid));
627 dbg(rules->udev, "extend gids from %u to %u\n", rules->gids_max, rules->gids_max + add);
629 rules->gids_max += add;
631 rules->gids[rules->gids_cur].gid = gid;
632 off = add_string(rules, group);
635 rules->gids[rules->gids_cur].name_off = off;
640 static int import_property_from_string(struct udev_device *dev, char *line)
642 struct udev *udev = udev_device_get_udev(dev);
649 while (isspace(key[0]))
652 /* comment or empty line */
653 if (key[0] == '#' || key[0] == '\0')
656 /* split key/value */
657 val = strchr(key, '=');
664 while (isspace(val[0]))
671 while (isspace(key[len-1]))
675 /* terminate value */
679 while (isspace(val[len-1]))
687 if (val[0] == '"' || val[0] == '\'') {
688 if (val[len-1] != val[0]) {
689 info(udev, "inconsistent quoting: '%s', skip\n", line);
696 dbg(udev, "adding '%s'='%s'\n", key, val);
698 /* handle device, renamed by external tool, returning new path */
699 if (strcmp(key, "DEVPATH") == 0) {
700 char syspath[UTIL_PATH_SIZE];
702 info(udev, "updating devpath from '%s' to '%s'\n",
703 udev_device_get_devpath(dev), val);
704 util_strlcpy(syspath, udev_get_sys_path(udev), sizeof(syspath));
705 util_strlcat(syspath, val, sizeof(syspath));
706 udev_device_set_syspath(dev, syspath);
708 struct udev_list_entry *entry;
710 entry = udev_device_add_property(dev, key, val);
712 udev_list_entry_set_flag(entry, 1);
717 static int import_file_into_properties(struct udev_device *dev, const char *filename)
720 char line[UTIL_LINE_SIZE];
722 f = fopen(filename, "r");
725 while (fgets(line, sizeof(line), f) != NULL)
726 import_property_from_string(dev, line);
731 static int import_program_into_properties(struct udev_device *dev, const char *program)
733 struct udev *udev = udev_device_get_udev(dev);
739 envp = udev_device_get_properties_envp(dev);
740 if (util_run_program(udev, program, envp, result, sizeof(result), &reslen) != 0)
744 while (line != NULL) {
747 pos = strchr(line, '\n');
752 import_property_from_string(dev, line);
758 static int import_parent_into_properties(struct udev_device *dev, const char *filter)
760 struct udev *udev = udev_device_get_udev(dev);
761 struct udev_device *dev_parent;
762 struct udev_list_entry *list_entry;
764 dev_parent = udev_device_get_parent(dev);
765 if (dev_parent == NULL)
768 dbg(udev, "found parent '%s', get the node name\n", udev_device_get_syspath(dev_parent));
769 udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
770 const char *key = udev_list_entry_get_name(list_entry);
771 const char *val = udev_list_entry_get_value(list_entry);
773 if (fnmatch(filter, key, 0) == 0) {
774 struct udev_list_entry *entry;
776 dbg(udev, "import key '%s=%s'\n", key, val);
777 entry = udev_device_add_property(dev, key, val);
779 udev_list_entry_set_flag(entry, 1);
785 #define WAIT_LOOP_PER_SECOND 50
786 static int wait_for_file(struct udev_device *dev, const char *file, int timeout)
788 struct udev *udev = udev_device_get_udev(dev);
789 char filepath[UTIL_PATH_SIZE];
790 char devicepath[UTIL_PATH_SIZE];
792 int loop = timeout * WAIT_LOOP_PER_SECOND;
794 /* a relative path is a device attribute */
795 devicepath[0] = '\0';
796 if (file[0] != '/') {
797 util_strlcpy(devicepath, udev_get_sys_path(udev), sizeof(devicepath));
798 util_strlcat(devicepath, udev_device_get_devpath(dev), sizeof(devicepath));
800 util_strlcpy(filepath, devicepath, sizeof(filepath));
801 util_strlcat(filepath, "/", sizeof(filepath));
802 util_strlcat(filepath, file, sizeof(filepath));
806 dbg(udev, "will wait %i sec for '%s'\n", timeout, file);
809 if (stat(file, &stats) == 0) {
810 info(udev, "file '%s' appeared after %i loops\n", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
813 /* make sure, the device did not disappear in the meantime */
814 if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
815 info(udev, "device disappeared while waiting for '%s'\n", file);
818 info(udev, "wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND);
819 usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND);
821 info(udev, "waiting for '%s' failed\n", file);
825 static int attr_subst_subdir(char *attr, size_t len)
830 pos = strstr(attr, "/*/");
832 char str[UTIL_PATH_SIZE];
836 util_strlcpy(str, &pos[2], sizeof(str));
841 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
844 if (dent->d_name[0] == '.')
846 util_strlcat(attr, dent->d_name, len);
847 util_strlcat(attr, str, len);
848 if (stat(attr, &stats) == 0) {
857 util_strlcat(attr, str, len);
863 static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value)
869 if (linepos == NULL && linepos[0] == '\0')
872 /* skip whitespace */
873 while (isspace(linepos[0]) || linepos[0] == ',')
877 if (linepos[0] == '\0')
883 if (linepos[0] == '\0')
885 if (isspace(linepos[0]))
887 if (linepos[0] == '=')
889 if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
890 if (linepos[1] == '=')
894 /* remember end of key */
897 /* skip whitespace after key */
898 while (isspace(linepos[0]))
900 if (linepos[0] == '\0')
903 /* get operation type */
904 if (linepos[0] == '=' && linepos[1] == '=') {
907 } else if (linepos[0] == '!' && linepos[1] == '=') {
910 } else if (linepos[0] == '+' && linepos[1] == '=') {
913 } else if (linepos[0] == '=') {
916 } else if (linepos[0] == ':' && linepos[1] == '=') {
917 *op = OP_ASSIGN_FINAL;
925 /* skip whitespace after operator */
926 while (isspace(linepos[0]))
928 if (linepos[0] == '\0')
932 if (linepos[0] == '"')
939 temp = strchr(linepos, '"');
944 dbg(udev, "%s '%s'-'%s'\n", operation_str(*op), *key, *value);
946 /* move line to next key */
951 /* extract possible KEY{attr} */
952 static char *get_key_attribute(struct udev *udev, char *str)
957 attr = strchr(str, '{');
960 pos = strchr(attr, '}');
962 err(udev, "missing closing brace for format\n");
966 dbg(udev, "attribute='%s'\n", attr);
972 static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
973 enum operation_type op,
974 const char *value, const void *data)
976 struct token *token = &rule_tmp->token[rule_tmp->token_cur];
977 const char *attr = data;
978 enum string_glob_type glob;
980 memset(token, 0x00, sizeof(struct token));
992 case TK_M_SUBSYSTEMS:
995 case TK_M_IMPORT_FILE:
996 case TK_M_IMPORT_PROG:
997 case TK_M_IMPORT_PARENT:
1005 token->key.value_off = add_string(rule_tmp->rules, value);
1012 token->key.value_off = add_string(rule_tmp->rules, value);
1013 token->key.attr_off = add_string(rule_tmp->rules, attr);
1016 token->key.value_off = add_string(rule_tmp->rules, value);
1018 token->key.mode = *(mode_t *)data;
1020 case TK_A_IGNORE_DEVICE:
1021 case TK_A_STRING_ESCAPE_NONE:
1022 case TK_A_STRING_ESCAPE_REPLACE:
1023 case TK_A_IGNORE_REMOVE:
1024 case TK_A_LAST_RULE:
1027 token->key.value_off = add_string(rule_tmp->rules, value);
1028 token->key.ignore_error = *(int *)data;
1030 case TK_A_NUM_FAKE_PART:
1031 token->key.num_fake_part = *(int *)data;
1033 case TK_A_DEVLINK_PRIO:
1034 token->key.devlink_prio = *(int *)data;
1037 token->key.uid = *(uid_t *)data;
1040 token->key.gid = *(gid_t *)data;
1043 token->key.mode = *(mode_t *)data;
1045 case TK_A_EVENT_TIMEOUT:
1046 token->key.event_timeout = *(int *)data;
1049 case TK_M_PARENTS_MIN:
1050 case TK_M_PARENTS_MAX:
1054 err(rule_tmp->rules->udev, "wrong type %u\n", type);
1059 if (value != NULL) {
1060 if (type < TK_M_MAX) {
1061 /* check if we need to split or call fnmatch() while matching rules */
1065 has_split = (strchr(value, '|') != NULL);
1066 has_glob = (strchr(value, '*') != NULL || strchr(value, '?') != NULL ||
1067 strchr(value, '[') != NULL || strchr(value, ']') != NULL);
1068 if (has_split && has_glob) {
1069 glob = GL_SPLIT_GLOB;
1070 } else if (has_split) {
1072 } else if (has_glob) {
1073 if (strcmp(value, "?*") == 0)
1074 glob = GL_SOMETHING;
1079 /* check if we need to substitute format strings for matching rules */
1080 if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
1085 token->key.type = type;
1087 token->key.glob = glob;
1088 rule_tmp->token_cur++;
1089 if (rule_tmp->token_cur >= ARRAY_SIZE(rule_tmp->token)) {
1090 err(rule_tmp->rules->udev, "temporary rule array too small\n");
1096 static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp)
1099 unsigned int start = 0;
1100 unsigned int end = rule_tmp->token_cur;
1102 for (i = 0; i < rule_tmp->token_cur; i++) {
1103 enum token_type next_val = TK_UNSET;
1104 unsigned int next_idx;
1107 /* find smallest value */
1108 for (j = start; j < end; j++) {
1109 if (rule_tmp->token[j].type == TK_UNSET)
1111 if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
1112 next_val = rule_tmp->token[j].type;
1117 /* add token and mark done */
1118 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
1120 rule_tmp->token[next_idx].type = TK_UNSET;
1123 if (next_idx == start)
1125 if (next_idx+1 == end)
1131 static int add_rule(struct udev_rules *rules, char *line,
1132 const char *filename, unsigned int filename_off, unsigned int lineno)
1138 struct rule_tmp rule_tmp;
1140 memset(&rule_tmp, 0x00, sizeof(struct rule_tmp));
1141 rule_tmp.rules = rules;
1142 rule_tmp.rule.type = TK_RULE;
1143 rule_tmp.rule.rule.filename_off = filename_off;
1144 rule_tmp.rule.rule.filename_line = lineno;
1150 enum operation_type op;
1152 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0)
1155 if (strcasecmp(key, "ACTION") == 0) {
1156 if (op > OP_MATCH_MAX) {
1157 err(rules->udev, "invalid ACTION operation\n");
1160 rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL);
1164 if (strcasecmp(key, "DEVPATH") == 0) {
1165 if (op > OP_MATCH_MAX) {
1166 err(rules->udev, "invalid DEVPATH operation\n");
1169 rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
1173 if (strcasecmp(key, "KERNEL") == 0) {
1174 if (op > OP_MATCH_MAX) {
1175 err(rules->udev, "invalid KERNEL operation\n");
1178 rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL);
1182 if (strcasecmp(key, "SUBSYSTEM") == 0) {
1183 if (op > OP_MATCH_MAX) {
1184 err(rules->udev, "invalid SUBSYSTEM operation\n");
1187 /* bus, class, subsystem events should all be the same */
1188 if (strcmp(value, "subsystem") == 0 ||
1189 strcmp(value, "bus") == 0 ||
1190 strcmp(value, "class") == 0) {
1191 if (strcmp(value, "bus") == 0 || strcmp(value, "class") == 0)
1192 err(rules->udev, "'%s' must be specified as 'subsystem' \n"
1193 "please fix it in %s:%u", value, filename, lineno);
1194 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
1196 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
1200 if (strcasecmp(key, "DRIVER") == 0) {
1201 if (op > OP_MATCH_MAX) {
1202 err(rules->udev, "invalid DRIVER operation\n");
1205 rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL);
1209 if (strncasecmp(key, "ATTR{", sizeof("ATTR{")-1) == 0) {
1210 attr = get_key_attribute(rules->udev, key + sizeof("ATTR")-1);
1212 err(rules->udev, "error parsing ATTR attribute\n");
1215 if (op < OP_MATCH_MAX) {
1216 rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
1218 rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr);
1223 if (strcasecmp(key, "KERNELS") == 0 ||
1224 strcasecmp(key, "ID") == 0) {
1225 if (op > OP_MATCH_MAX) {
1226 err(rules->udev, "invalid KERNELS operation\n");
1229 rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1233 if (strcasecmp(key, "SUBSYSTEMS") == 0 ||
1234 strcasecmp(key, "BUS") == 0) {
1235 if (op > OP_MATCH_MAX) {
1236 err(rules->udev, "invalid SUBSYSTEMS operation\n");
1239 rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1243 if (strcasecmp(key, "DRIVERS") == 0) {
1244 if (op > OP_MATCH_MAX) {
1245 err(rules->udev, "invalid DRIVERS operation\n");
1248 rule_add_key(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
1252 if (strncasecmp(key, "ATTRS{", sizeof("ATTRS{")-1) == 0 ||
1253 strncasecmp(key, "SYSFS{", sizeof("SYSFS{")-1) == 0) {
1254 if (op > OP_MATCH_MAX) {
1255 err(rules->udev, "invalid ATTRS operation\n");
1258 attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
1260 err(rules->udev, "error parsing ATTRS attribute\n");
1263 if (strncmp(attr, "device/", 7) == 0)
1264 err(rules->udev, "the 'device' link may not be available in a future kernel, "
1265 "please fix it in %s:%u", filename, lineno);
1266 else if (strstr(attr, "../") != NULL)
1267 err(rules->udev, "do not reference parent sysfs directories directly, "
1268 "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
1269 rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1273 if (strncasecmp(key, "ENV{", sizeof("ENV{")-1) == 0) {
1274 attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1);
1276 err(rules->udev, "error parsing ENV attribute\n");
1279 if (strncmp(attr, "PHYSDEV", 7) == 0)
1281 if (op < OP_MATCH_MAX) {
1282 if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
1285 if (rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
1291 if (strcasecmp(key, "PROGRAM") == 0) {
1292 rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
1296 if (strcasecmp(key, "RESULT") == 0) {
1297 if (op > OP_MATCH_MAX) {
1298 err(rules->udev, "invalid RESULT operation\n");
1301 rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL);
1305 if (strncasecmp(key, "IMPORT", sizeof("IMPORT")-1) == 0) {
1306 attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1);
1307 if (attr != NULL && strstr(attr, "program")) {
1308 dbg(rules->udev, "IMPORT will be executed\n");
1309 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1310 } else if (attr != NULL && strstr(attr, "file")) {
1311 dbg(rules->udev, "IMPORT will be included as file\n");
1312 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1313 } else if (attr != NULL && strstr(attr, "parent")) {
1314 dbg(rules->udev, "IMPORT will include the parent values\n");
1315 rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
1317 /* figure it out if it is executable */
1318 char file[UTIL_PATH_SIZE];
1320 struct stat statbuf;
1322 util_strlcpy(file, value, sizeof(file));
1323 pos = strchr(file, ' ');
1327 /* allow programs in /lib/udev called without the path */
1328 if (strchr(file, '/') == NULL) {
1329 util_strlcpy(file, UDEV_PREFIX "/lib/udev/", sizeof(file));
1330 util_strlcat(file, value, sizeof(file));
1331 pos = strchr(file, ' ');
1336 dbg(rules->udev, "IMPORT auto mode for '%s'\n", file);
1337 if (!lstat(file, &statbuf) && (statbuf.st_mode & S_IXUSR)) {
1338 dbg(rules->udev, "IMPORT will be executed (autotype)\n");
1339 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1341 dbg(rules->udev, "IMPORT will be included as file (autotype)\n");
1342 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1348 if (strncasecmp(key, "TEST", sizeof("TEST")-1) == 0) {
1351 if (op > OP_MATCH_MAX) {
1352 err(rules->udev, "invalid TEST operation\n");
1355 attr = get_key_attribute(rules->udev, key + sizeof("TEST")-1);
1357 mode = strtol(attr, NULL, 8);
1358 rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode);
1360 rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL);
1365 if (strncasecmp(key, "RUN", sizeof("RUN")-1) == 0) {
1368 attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1);
1369 if (attr != NULL && strstr(attr, "ignore_error"))
1371 rule_add_key(&rule_tmp, TK_A_RUN, op, value, &flag);
1375 if (strcasecmp(key, "WAIT_FOR") == 0 || strcasecmp(key, "WAIT_FOR_SYSFS") == 0) {
1376 rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1381 if (strcasecmp(key, "LABEL") == 0) {
1382 rule_tmp.rule.rule.label_off = add_string(rules, value);
1386 if (strcasecmp(key, "GOTO") == 0) {
1387 rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1391 if (strncasecmp(key, "NAME", sizeof("NAME")-1) == 0) {
1392 if (op < OP_MATCH_MAX) {
1393 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
1395 if (value[0] == '\0')
1396 info(rules->udev, "name empty, node creation suppressed\n");
1397 rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL);
1398 attr = get_key_attribute(rules->udev, key + sizeof("NAME")-1);
1400 if (strstr(attr, "all_partitions") != NULL) {
1401 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1403 dbg(rules->udev, "creation of partition nodes requested\n");
1404 rule_add_key(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1406 if (strstr(attr, "ignore_remove") != NULL) {
1407 dbg(rules->udev, "remove event should be ignored\n");
1408 rule_add_key(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1412 rule_tmp.rule.rule.flags = 1;
1416 if (strcasecmp(key, "SYMLINK") == 0) {
1417 if (op < OP_MATCH_MAX)
1418 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
1420 rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, NULL);
1421 rule_tmp.rule.rule.flags = 1;
1425 if (strcasecmp(key, "OWNER") == 0) {
1429 uid = strtoul(value, &endptr, 10);
1430 if (endptr[0] == '\0') {
1431 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1432 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1433 uid = add_uid(rules, value);
1434 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1435 } else if (rules->resolve_names == 0) {
1436 rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
1438 rule_tmp.rule.rule.flags = 1;
1442 if (strcasecmp(key, "GROUP") == 0) {
1446 gid = strtoul(value, &endptr, 10);
1447 if (endptr[0] == '\0') {
1448 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1449 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1450 gid = add_gid(rules, value);
1451 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1452 } else if (rules->resolve_names == 0) {
1453 rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
1455 rule_tmp.rule.rule.flags = 1;
1459 if (strcasecmp(key, "MODE") == 0) {
1463 mode = strtol(value, &endptr, 8);
1464 if (endptr[0] == '\0')
1465 rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1467 rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
1468 rule_tmp.rule.rule.flags = 1;
1472 if (strcasecmp(key, "OPTIONS") == 0) {
1475 if (strstr(value, "last_rule") != NULL) {
1476 dbg(rules->udev, "last rule to be applied\n");
1477 rule_add_key(&rule_tmp, TK_A_LAST_RULE, 0, NULL, NULL);
1479 if (strstr(value, "ignore_device") != NULL) {
1480 dbg(rules->udev, "device should be ignored\n");
1481 rule_add_key(&rule_tmp, TK_A_IGNORE_DEVICE, 0, NULL, NULL);
1483 if (strstr(value, "ignore_remove") != NULL) {
1484 dbg(rules->udev, "remove event should be ignored\n");
1485 rule_add_key(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1487 pos = strstr(value, "link_priority=");
1489 int prio = atoi(&pos[strlen("link_priority=")]);
1491 rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, 0, NULL, &prio);
1492 dbg(rules->udev, "link priority=%i\n", prio);
1494 pos = strstr(value, "event_timeout=");
1496 int tout = atoi(&pos[strlen("event_timeout=")]);
1498 rule_add_key(&rule_tmp, TK_A_EVENT_TIMEOUT, 0, NULL, &tout);
1499 dbg(rules->udev, "event timout=%i\n", tout);
1501 pos = strstr(value, "string_escape=");
1503 pos = &pos[strlen("string_escape=")];
1504 if (strncmp(pos, "none", strlen("none")) == 0)
1505 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, 0, NULL, NULL);
1506 else if (strncmp(pos, "replace", strlen("replace")) == 0)
1507 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, 0, NULL, NULL);
1509 if (strstr(value, "all_partitions") != NULL) {
1510 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1512 rule_add_key(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1513 dbg(rules->udev, "creation of partition nodes requested\n");
1517 err(rules->udev, "unknown key '%s' in %s:%u\n", key, filename, lineno);
1520 if (physdev && !waitfor)
1521 err(rules->udev, "PHYSDEV* values are deprecated and not available on recent kernels, "
1522 "please fix it in %s:%u\n", filename, lineno);
1524 /* add rule token */
1525 rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur;
1526 if (add_token(rules, &rule_tmp.rule) != 0)
1529 /* add tokens to list, sorted by type */
1530 if (sort_token(rules, &rule_tmp) != 0)
1535 err(rules->udev, "invalid rule '%s:%u'\n", filename, lineno);
1539 static int parse_file(struct udev_rules *rules, const char *filename, unsigned short filename_off)
1542 unsigned int first_token;
1543 char line[UTIL_LINE_SIZE];
1547 info(rules->udev, "reading '%s' as rules file\n", filename);
1549 f = fopen(filename, "r");
1553 first_token = rules->token_cur;
1555 while(fgets(line, sizeof(line), f) != NULL) {
1559 /* skip whitespace */
1562 while (isspace(key[0]))
1573 /* continue reading if backslash+newline is found */
1574 while (line[len-2] == '\\') {
1575 if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1581 if (len+1 >= sizeof(line)) {
1582 err(rules->udev, "line too long '%s':%u, ignored\n", filename, line_nr);
1585 add_rule(rules, key, filename, filename_off, line_nr);
1589 /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1590 for (i = first_token+1; i < rules->token_cur; i++) {
1591 if (rules->tokens[i].type == TK_A_GOTO) {
1592 char *label = &rules->buf[rules->tokens[i].key.value_off];
1595 for (j = i+1; j < rules->token_cur; j++) {
1596 if (rules->tokens[j].type != TK_RULE)
1598 if (rules->tokens[j].rule.label_off == 0)
1600 if (strcmp(label, &rules->buf[rules->tokens[j].rule.label_off]) != 0)
1602 rules->tokens[i].key.rule_goto = j;
1604 if (rules->tokens[i].key.rule_goto == 0)
1605 err(rules->udev, "GOTO '%s' has no matching label in: '%s'\n", label, filename);
1611 static int add_matching_files(struct udev *udev, struct udev_list_node *file_list, const char *dirname, const char *suffix)
1614 char filename[UTIL_PATH_SIZE];
1616 dbg(udev, "open directory '%s'\n", dirname);
1617 dir = opendir(dirname);
1619 info(udev, "unable to open '%s': %m\n", dirname);
1624 struct dirent *dent;
1626 dent = readdir(dir);
1627 if (dent == NULL || dent->d_name[0] == '\0')
1630 if (dent->d_name[0] == '.')
1633 /* look for file matching with specified suffix */
1634 if (suffix != NULL) {
1637 ext = strrchr(dent->d_name, '.');
1640 if (strcmp(ext, suffix) != 0)
1643 dbg(udev, "put file '%s/%s' into list\n", dirname, dent->d_name);
1645 snprintf(filename, sizeof(filename), "%s/%s", dirname, dent->d_name);
1646 filename[sizeof(filename)-1] = '\0';
1647 udev_list_entry_add(udev, file_list, filename, NULL, 1, 1);
1654 struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
1656 struct udev_rules *rules;
1657 struct stat statbuf;
1658 struct udev_list_node file_list;
1659 struct udev_list_entry *file_loop, *file_tmp;
1660 struct token end_token;
1662 rules = malloc(sizeof(struct udev_rules));
1665 memset(rules, 0x00, sizeof(struct udev_rules));
1667 rules->resolve_names = resolve_names;
1668 udev_list_init(&file_list);
1670 /* init token array and string buffer */
1671 rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
1672 if (rules->tokens == NULL)
1674 rules->token_max = PREALLOC_TOKEN;
1676 rules->buf = malloc(PREALLOC_STRBUF);
1677 if (rules->buf == NULL)
1679 rules->buf_max = PREALLOC_STRBUF;
1680 /* offset 0 is always '\0' */
1681 rules->buf[0] = '\0';
1683 dbg(udev, "prealloc %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1684 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1686 rules->trie_nodes = malloc(PREALLOC_TRIE * sizeof(struct trie_node));
1687 if (rules->trie_nodes == NULL)
1689 rules->trie_nodes_max = PREALLOC_TRIE;
1690 /* offset 0 is the trie root, with an empty string */
1691 memset(rules->trie_nodes, 0x00, sizeof(struct trie_node));
1692 rules->trie_nodes_cur = 1;
1694 if (udev_get_rules_path(udev) != NULL) {
1695 /* custom rules location for testing */
1696 add_matching_files(udev, &file_list, udev_get_rules_path(udev), ".rules");
1698 char filename[PATH_MAX];
1699 struct udev_list_node sort_list;
1700 struct udev_list_entry *sort_loop, *sort_tmp;
1702 /* read user/custom rules */
1703 add_matching_files(udev, &file_list, SYSCONFDIR "/udev/rules.d", ".rules");
1705 /* read dynamic/temporary rules */
1706 util_strlcpy(filename, udev_get_dev_path(udev), sizeof(filename));
1707 util_strlcat(filename, "/.udev/rules.d", sizeof(filename));
1708 if (stat(filename, &statbuf) != 0) {
1709 util_create_path(udev, filename);
1710 udev_selinux_setfscreatecon(udev, filename, S_IFDIR|0755);
1711 mkdir(filename, 0755);
1712 udev_selinux_resetfscreatecon(udev);
1714 udev_list_init(&sort_list);
1715 add_matching_files(udev, &sort_list, filename, ".rules");
1717 /* read default rules */
1718 add_matching_files(udev, &sort_list, UDEV_PREFIX "/lib/udev/rules.d", ".rules");
1720 /* sort all rules files by basename into list of files */
1721 udev_list_entry_foreach_safe(sort_loop, sort_tmp, udev_list_get_entry(&sort_list)) {
1722 const char *sort_name = udev_list_entry_get_name(sort_loop);
1723 const char *sort_base = strrchr(sort_name, '/');
1725 if (sort_base == NULL)
1727 /* sort entry into existing list */
1728 udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1729 const char *file_name = udev_list_entry_get_name(file_loop);
1730 const char *file_base = strrchr(file_name, '/');
1732 if (file_base == NULL)
1734 if (strcmp(file_base, sort_base) == 0) {
1735 info(udev, "rule file basename '%s' already added, ignoring '%s'\n",
1736 file_name, sort_name);
1737 udev_list_entry_delete(sort_loop);
1741 if (strcmp(file_base, sort_base) > 0) {
1742 /* found later file, insert before */
1743 udev_list_entry_remove(sort_loop);
1744 udev_list_entry_insert_before(sort_loop, file_loop);
1749 /* current file already handled */
1750 if (sort_loop == NULL)
1752 /* no later file, append to end of list */
1753 udev_list_entry_remove(sort_loop);
1754 udev_list_entry_append(sort_loop, &file_list);
1758 /* add all filenames to the string buffer */
1759 udev_list_entry_foreach(file_loop, udev_list_get_entry(&file_list)) {
1760 const char *filename = udev_list_entry_get_name(file_loop);
1761 unsigned int filename_off;
1763 filename_off = add_string(rules, filename);
1764 /* the offset in the rule is limited to unsigned short */
1765 if (filename_off < USHRT_MAX)
1766 udev_list_entry_set_flag(file_loop, filename_off);
1769 /* parse list of files */
1770 udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1771 const char *filename = udev_list_entry_get_name(file_loop);
1772 unsigned int filename_off = udev_list_entry_get_flag(file_loop);
1774 if (stat(filename, &statbuf) == 0 && statbuf.st_size > 0)
1775 parse_file(rules, filename, filename_off);
1777 info(udev, "can not read '%s'\n", filename);
1778 udev_list_entry_delete(file_loop);
1781 memset(&end_token, 0x00, sizeof(struct token));
1782 end_token.type = TK_END;
1783 add_token(rules, &end_token);
1785 /* shrink allocated token and string buffer */
1786 if (rules->token_cur < rules->token_max) {
1787 struct token *tokens;
1789 tokens = realloc(rules->tokens, rules->token_cur * sizeof(struct token));
1790 if (tokens != NULL || rules->token_cur == 0) {
1791 rules->tokens = tokens;
1792 rules->token_max = rules->token_cur;
1795 if (rules->buf_cur < rules->buf_max) {
1798 buf = realloc(rules->buf, rules->buf_cur);
1799 if (buf != NULL || rules->buf_cur == 0) {
1801 rules->buf_max = rules->buf_cur;
1804 info(udev, "rules use %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1805 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1806 info(udev, "temporary index used %zu bytes (%u * %zu bytes)\n",
1807 rules->trie_nodes_cur * sizeof(struct trie_node),
1808 rules->trie_nodes_cur, sizeof(struct trie_node));
1811 free(rules->trie_nodes);
1812 rules->trie_nodes = NULL;
1813 rules->trie_nodes_cur = 0;
1814 rules->trie_nodes_max = 0;
1816 /* cleanup uid/gid cache */
1819 rules->uids_cur = 0;
1820 rules->uids_max = 0;
1823 rules->gids_cur = 0;
1824 rules->gids_max = 0;
1830 void udev_rules_unref(struct udev_rules *rules)
1834 free(rules->tokens);
1836 free(rules->trie_nodes);
1842 static int match_key(struct udev_rules *rules, struct token *token, const char *val)
1844 char *key_value = &rules->buf[token->key.value_off];
1851 switch (token->key.glob) {
1853 match = (strcmp(key_value, val) == 0);
1856 match = (fnmatch(key_value, val, 0) == 0);
1863 split = &rules->buf[token->key.value_off];
1868 next = strchr(split, '|');
1870 size_t matchlen = (size_t)(next - split);
1872 match = (matchlen == len && strncmp(split, val, matchlen) == 0);
1876 match = (strcmp(split, val) == 0);
1885 char value[UTIL_PATH_SIZE];
1887 util_strlcpy(value, &rules->buf[token->key.value_off], sizeof(value));
1889 while (key_value != NULL) {
1890 pos = strchr(key_value, '|');
1895 dbg(rules->udev, "match %s '%s' <-> '%s'\n", token_str(token->type), key_value, val);
1896 match = (fnmatch(key_value, val, 0) == 0);
1904 match = (val[0] != '\0');
1911 if (match && (token->key.op == OP_MATCH)) {
1912 dbg(rules->udev, "%s is true (matching value)\n", token_str(token->type));
1915 if (!match && (token->key.op == OP_NOMATCH)) {
1916 dbg(rules->udev, "%s is true (non-matching value)\n", token_str(token->type));
1919 dbg(rules->udev, "%s is not true\n", token_str(token->type));
1923 static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur)
1925 const char *key_name = &rules->buf[cur->key.attr_off];
1926 const char *key_value = &rules->buf[cur->key.value_off];
1927 char value[UTIL_NAME_SIZE];
1931 if (key_name[0] == '[') {
1932 char attr[UTIL_PATH_SIZE];
1934 util_strlcpy(attr, key_name, sizeof(attr));
1935 util_resolve_subsys_kernel(event->udev, attr, value, sizeof(value), 1);
1937 if (value[0] == '\0') {
1940 val = udev_device_get_sysattr_value(dev, key_name);
1943 util_strlcpy(value, val, sizeof(value));
1946 /* strip trailing whitespace of value, if not asked to match for it */
1947 len = strlen(key_value);
1948 if (len > 0 && !isspace(key_value[len-1])) {
1949 len = strlen(value);
1950 while (len > 0 && isspace(value[--len]))
1952 dbg(rules->udev, "removed trailing whitespace from '%s'\n", value);
1954 return match_key(rules, cur, value);
1963 int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event)
1967 enum escape_type esc = ESCAPE_UNSET;
1970 if (rules->tokens == NULL)
1973 can_set_name = ((strcmp(udev_device_get_action(event->dev), "add") == 0 ||
1974 strcmp(udev_device_get_action(event->dev), "change") == 0) &&
1975 (major(udev_device_get_devnum(event->dev)) > 0 ||
1976 strcmp(udev_device_get_subsystem(event->dev), "net") == 0));
1978 /* loop through token list, match, run actions or forward to next rule */
1979 cur = &rules->tokens[0];
1982 dump_token(rules, cur);
1983 switch (cur->type) {
1987 /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
1988 if (!can_set_name && rule->rule.flags)
1993 if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
1997 if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
2001 if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
2006 size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
2007 struct udev_list_entry *list_entry;
2010 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
2011 const char *devlink;
2013 devlink = &udev_list_entry_get_name(list_entry)[devlen];
2014 if (match_key(rules, cur, devlink) == 0) {
2024 if (match_key(rules, cur, event->name) != 0)
2029 const char *key_name = &rules->buf[cur->key.attr_off];
2032 value = udev_device_get_property_value(event->dev, key_name);
2033 if (value == NULL) {
2034 dbg(event->udev, "ENV{%s} is not set, treat as empty\n", key_name);
2037 if (match_key(rules, cur, value))
2041 case TK_M_SUBSYSTEM:
2042 if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
2046 if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
2051 char filename[UTIL_PATH_SIZE];
2054 util_strlcpy(filename, &rules->buf[cur->key.value_off], sizeof(filename));
2055 udev_event_apply_format(event, filename, sizeof(filename));
2056 found = (wait_for_file(event->dev, filename, 10) == 0);
2057 if (!found && (cur->key.op != OP_NOMATCH))
2062 if (match_attr(rules, event->dev, event, cur) != 0)
2066 case TK_M_SUBSYSTEMS:
2072 /* get whole sequence of parent matches */
2074 while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX)
2077 /* loop over parents */
2078 event->dev_parent = event->dev;
2082 dbg(event->udev, "parent: '%s'\n", udev_device_get_syspath(event->dev_parent));
2083 /* loop over sequence of parent match keys */
2084 for (key = cur; key < next; key++ ) {
2085 dump_token(rules, key);
2088 if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
2091 case TK_M_SUBSYSTEMS:
2092 if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
2096 if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
2100 if (match_attr(rules, event->dev_parent, event, key) != 0)
2106 dbg(event->udev, "parent key matched\n");
2108 dbg(event->udev, "all parent keys matched\n");
2109 /* all keys matched */
2113 event->dev_parent = udev_device_get_parent(event->dev_parent);
2114 if (event->dev_parent == NULL)
2117 /* move behind our sequence of parent match keys */
2123 char filename[UTIL_PATH_SIZE];
2124 struct stat statbuf;
2127 util_strlcpy(filename, &rules->buf[cur->key.value_off], sizeof(filename));
2128 udev_event_apply_format(event, filename, sizeof(filename));
2129 if (util_resolve_subsys_kernel(event->udev, NULL, filename, sizeof(filename), 0) != 0)
2130 if (filename[0] != '/') {
2131 char tmp[UTIL_PATH_SIZE];
2133 util_strlcpy(tmp, udev_device_get_syspath(event->dev), sizeof(tmp));
2134 util_strlcat(tmp, "/", sizeof(tmp));
2135 util_strlcat(tmp, filename, sizeof(tmp));
2136 util_strlcpy(filename, tmp, sizeof(filename));
2139 attr_subst_subdir(filename, sizeof(filename));
2141 match = (stat(filename, &statbuf) == 0);
2142 dbg(event->udev, "'%s' %s", filename, match ? "exists\n" : "does not exist\n");
2143 if (match && cur->key.mode > 0) {
2144 match = ((statbuf.st_mode & cur->key.mode) > 0);
2145 dbg(event->udev, "'%s' has mode=%#o and %s %#o\n", filename, statbuf.st_mode,
2146 match ? "matches" : "does not match", cur->key.mode);
2148 if (match && cur->key.op == OP_NOMATCH)
2150 if (!match && cur->key.op == OP_MATCH)
2156 char program[UTIL_PATH_SIZE];
2158 char result[UTIL_PATH_SIZE];
2160 free(event->program_result);
2161 event->program_result = NULL;
2162 util_strlcpy(program, &rules->buf[cur->key.value_off], sizeof(program));
2163 udev_event_apply_format(event, program, sizeof(program));
2164 envp = udev_device_get_properties_envp(event->dev);
2165 info(event->udev, "PROGRAM '%s' %s:%u\n",
2167 &rules->buf[rule->rule.filename_off],
2168 rule->rule.filename_line);
2169 if (util_run_program(event->udev, program, envp, result, sizeof(result), NULL) != 0) {
2170 if (cur->key.op != OP_NOMATCH)
2175 util_remove_trailing_chars(result, '\n');
2176 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2177 count = udev_util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
2179 info(event->udev, "%i character(s) replaced\n" , count);
2181 event->program_result = strdup(result);
2182 dbg(event->udev, "storing result '%s'\n", event->program_result);
2183 if (cur->key.op == OP_NOMATCH)
2188 case TK_M_IMPORT_FILE:
2190 char import[UTIL_PATH_SIZE];
2192 util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));
2193 udev_event_apply_format(event, import, sizeof(import));
2194 if (import_file_into_properties(event->dev, import) != 0)
2195 if (cur->key.op != OP_NOMATCH)
2199 case TK_M_IMPORT_PROG:
2201 char import[UTIL_PATH_SIZE];
2203 util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));
2204 udev_event_apply_format(event, import, sizeof(import));
2205 info(event->udev, "IMPORT '%s' %s:%u\n",
2207 &rules->buf[rule->rule.filename_off],
2208 rule->rule.filename_line);
2209 if (import_program_into_properties(event->dev, import) != 0)
2210 if (cur->key.op != OP_NOMATCH)
2214 case TK_M_IMPORT_PARENT:
2216 char import[UTIL_PATH_SIZE];
2218 util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));
2219 udev_event_apply_format(event, import, sizeof(import));
2220 if (import_parent_into_properties(event->dev, import) != 0)
2221 if (cur->key.op != OP_NOMATCH)
2226 if (match_key(rules, cur, event->program_result) != 0)
2230 case TK_A_IGNORE_DEVICE:
2231 event->ignore_device = 1;
2234 case TK_A_STRING_ESCAPE_NONE:
2237 case TK_A_STRING_ESCAPE_REPLACE:
2238 esc = ESCAPE_REPLACE;
2240 case TK_A_NUM_FAKE_PART:
2241 if (strcmp(udev_device_get_subsystem(event->dev), "block") != 0)
2243 if (udev_device_get_sysnum(event->dev) != NULL)
2245 udev_device_set_num_fake_partitions(event->dev, cur->key.num_fake_part);
2247 case TK_A_DEVLINK_PRIO:
2248 udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
2252 char owner[UTIL_NAME_SIZE];
2254 if (event->owner_final)
2256 if (cur->key.op == OP_ASSIGN_FINAL)
2257 event->owner_final = 1;
2258 util_strlcpy(owner, &rules->buf[cur->key.value_off], sizeof(owner));
2259 udev_event_apply_format(event, owner, sizeof(owner));
2260 event->uid = util_lookup_user(event->udev, owner);
2261 info(event->udev, "OWNER %u %s:%u\n",
2263 &rules->buf[rule->rule.filename_off],
2264 rule->rule.filename_line);
2269 char group[UTIL_NAME_SIZE];
2271 if (event->group_final)
2273 if (cur->key.op == OP_ASSIGN_FINAL)
2274 event->group_final = 1;
2275 util_strlcpy(group, &rules->buf[cur->key.value_off], sizeof(group));
2276 udev_event_apply_format(event, group, sizeof(group));
2277 event->gid = util_lookup_group(event->udev, group);
2278 info(event->udev, "GROUP %u %s:%u\n",
2280 &rules->buf[rule->rule.filename_off],
2281 rule->rule.filename_line);
2286 char mode[UTIL_NAME_SIZE];
2289 if (event->mode_final)
2291 if (cur->key.op == OP_ASSIGN_FINAL)
2292 event->mode_final = 1;
2293 util_strlcpy(mode, &rules->buf[cur->key.value_off], sizeof(mode));
2294 udev_event_apply_format(event, mode, sizeof(mode));
2295 event->mode = strtol(mode, &endptr, 8);
2296 if (endptr[0] != '\0') {
2297 err(event->udev, "invalide mode '%s' set default mode 0660\n", mode);
2300 info(event->udev, "MODE %#o %s:%u\n",
2302 &rules->buf[rule->rule.filename_off],
2303 rule->rule.filename_line);
2307 if (event->owner_final)
2309 if (cur->key.op == OP_ASSIGN_FINAL)
2310 event->owner_final = 1;
2311 event->uid = cur->key.uid;
2312 info(event->udev, "OWNER %u %s:%u\n",
2314 &rules->buf[rule->rule.filename_off],
2315 rule->rule.filename_line);
2318 if (event->group_final)
2320 if (cur->key.op == OP_ASSIGN_FINAL)
2321 event->group_final = 1;
2322 event->gid = cur->key.gid;
2323 info(event->udev, "GROUP %u %s:%u\n",
2325 &rules->buf[rule->rule.filename_off],
2326 rule->rule.filename_line);
2329 if (event->mode_final)
2331 if (cur->key.op == OP_ASSIGN_FINAL)
2332 event->mode_final = 1;
2333 event->mode = cur->key.mode;
2334 info(event->udev, "MODE %#o %s:%u\n",
2336 &rules->buf[rule->rule.filename_off],
2337 rule->rule.filename_line);
2341 const char *name = &rules->buf[cur->key.attr_off];
2342 char *value = &rules->buf[cur->key.value_off];
2344 if (value[0] != '\0') {
2345 char temp_value[UTIL_NAME_SIZE];
2346 struct udev_list_entry *entry;
2348 util_strlcpy(temp_value, value, sizeof(temp_value));
2349 udev_event_apply_format(event, temp_value, sizeof(temp_value));
2350 entry = udev_device_add_property(event->dev, name, temp_value);
2352 udev_list_entry_set_flag(entry, 1);
2354 udev_device_add_property(event->dev, name, NULL);
2360 const char *name = &rules->buf[cur->key.value_off];
2361 char name_str[UTIL_PATH_SIZE];
2364 if (event->name_final)
2366 if (cur->key.op == OP_ASSIGN_FINAL)
2367 event->name_final = 1;
2368 util_strlcpy(name_str, name, sizeof(name_str));
2369 udev_event_apply_format(event, name_str, sizeof(name_str));
2370 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2371 count = udev_util_replace_chars(name_str, "/");
2373 info(event->udev, "%i character(s) replaced\n", count);
2376 event->name = strdup(name_str);
2377 info(event->udev, "NAME '%s' %s:%u\n",
2379 &rules->buf[rule->rule.filename_off],
2380 rule->rule.filename_line);
2385 char temp[UTIL_PATH_SIZE];
2386 char filename[UTIL_PATH_SIZE];
2390 if (event->devlink_final)
2392 if (major(udev_device_get_devnum(event->dev)) == 0)
2394 if (cur->key.op == OP_ASSIGN_FINAL)
2395 event->devlink_final = 1;
2396 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2397 udev_device_cleanup_devlinks_list(event->dev);
2399 /* allow multiple symlinks separated by spaces */
2400 util_strlcpy(temp, &rules->buf[cur->key.value_off], sizeof(temp));
2401 udev_event_apply_format(event, temp, sizeof(temp));
2402 if (esc == ESCAPE_UNSET)
2403 count = udev_util_replace_chars(temp, "/ ");
2404 else if (esc == ESCAPE_REPLACE)
2405 count = udev_util_replace_chars(temp, "/");
2407 info(event->udev, "%i character(s) replaced\n" , count);
2408 dbg(event->udev, "rule applied, added symlink(s) '%s'\n", temp);
2410 while (isspace(pos[0]))
2412 next = strchr(pos, ' ');
2415 info(event->udev, "LINK '%s' %s:%u\n",
2417 &rules->buf[rule->rule.filename_off],
2418 rule->rule.filename_line);
2419 util_strlcpy(filename, udev_get_dev_path(event->udev), sizeof(filename));
2420 util_strlcat(filename, "/", sizeof(filename));
2421 util_strlcat(filename, pos, sizeof(filename));
2422 udev_device_add_devlink(event->dev, filename);
2423 while (isspace(next[1]))
2426 next = strchr(pos, ' ');
2428 if (pos[0] != '\0') {
2429 info(event->udev, "LINK '%s' %s:%u\n",
2431 &rules->buf[rule->rule.filename_off],
2432 rule->rule.filename_line);
2433 util_strlcpy(filename, udev_get_dev_path(event->udev), sizeof(filename));
2434 util_strlcat(filename, "/", sizeof(filename));
2435 util_strlcat(filename, pos, sizeof(filename));
2436 udev_device_add_devlink(event->dev, filename);
2440 case TK_A_EVENT_TIMEOUT:
2441 udev_device_set_event_timeout(event->dev, cur->key.event_timeout);
2443 case TK_A_IGNORE_REMOVE:
2444 udev_device_set_ignore_remove(event->dev, 1);
2448 const char *key_name = &rules->buf[cur->key.attr_off];
2449 char attr[UTIL_PATH_SIZE];
2450 char value[UTIL_NAME_SIZE];
2453 util_strlcpy(attr, key_name, sizeof(attr));
2454 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0) {
2455 util_strlcpy(attr, udev_device_get_syspath(event->dev), sizeof(attr));
2456 util_strlcat(attr, "/", sizeof(attr));
2457 util_strlcat(attr, key_name, sizeof(attr));
2460 attr_subst_subdir(attr, sizeof(attr));
2462 util_strlcpy(value, &rules->buf[cur->key.value_off], sizeof(value));
2463 udev_event_apply_format(event, value, sizeof(value));
2464 info(event->udev, "ATTR '%s' writing '%s' %s:%u\n", attr, value,
2465 &rules->buf[rule->rule.filename_off],
2466 rule->rule.filename_line);
2467 f = fopen(attr, "w");
2469 if (fprintf(f, "%s", value) <= 0)
2470 err(event->udev, "error writing ATTR{%s}: %m\n", attr);
2473 err(event->udev, "error opening ATTR{%s} for writing: %m\n", attr);
2479 struct udev_list_entry *list_entry;
2481 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2482 udev_list_cleanup_entries(event->udev, &event->run_list);
2483 info(event->udev, "RUN '%s' %s:%u\n",
2484 &rules->buf[cur->key.value_off],
2485 &rules->buf[rule->rule.filename_off],
2486 rule->rule.filename_line);
2487 list_entry = udev_list_entry_add(event->udev, &event->run_list,
2488 &rules->buf[cur->key.value_off], NULL, 1, 0);
2489 if (cur->key.ignore_error)
2490 udev_list_entry_set_flag(list_entry, 1);
2494 cur = &rules->tokens[cur->key.rule_goto];
2496 case TK_A_LAST_RULE:
2500 case TK_M_PARENTS_MIN:
2501 case TK_M_PARENTS_MAX:
2504 err(rules->udev, "wrong type %u\n", cur->type);
2511 /* fast-forward to next rule */
2512 cur = rule + rule->rule.token_count;
2513 dbg(rules->udev, "forward to rule: %u\n",
2514 (unsigned int) (cur - rules->tokens));