2 * Copyright (C) 2003-2009 Kay Sievers <kay.sievers@vrfy.org>
3 * Copyright (C) 2008 Alan Jenkins <alan-jenkins@tuffmail.co.uk>
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
34 #define PREALLOC_TOKEN 2048
35 #define PREALLOC_STRBUF 32 * 1024
36 #define PREALLOC_TRIE 256
39 unsigned int name_off;
47 /* this node's first child */
48 unsigned int child_idx;
49 /* the next child of our parent node's child list */
50 unsigned int next_child_idx;
51 /* this node's last child (shortcut for append) */
52 unsigned int last_child_idx;
53 unsigned int value_off;
54 unsigned short value_len;
62 /* every key in the rules file becomes a token */
64 unsigned int token_cur;
65 unsigned int token_max;
67 /* all key strings are copied to a single string buffer */
71 unsigned int buf_count;
73 /* during rule parsing, strings are indexed to find duplicates */
74 struct trie_node *trie_nodes;
75 unsigned int trie_nodes_cur;
76 unsigned int trie_nodes_max;
78 /* during rule parsing, uid/gid lookup results are cached */
80 unsigned int uids_cur;
81 unsigned int uids_max;
83 unsigned int gids_cur;
84 unsigned int gids_max;
87 /* KEY=="", KEY!="", KEY+="", KEY="", KEY:="" */
100 enum string_glob_type {
102 GL_PLAIN, /* no special chars */
103 GL_GLOB, /* shell globs ?,*,[] */
104 GL_SPLIT, /* multi-value A|B */
105 GL_SPLIT_GLOB, /* multi-value with glob A*|B* */
106 GL_SOMETHING, /* commonly used "?*" */
109 enum string_subst_type {
116 /* tokens of a rule are sorted/handled in this order */
121 TK_M_ACTION, /* val */
122 TK_M_DEVPATH, /* val */
123 TK_M_KERNEL, /* val */
124 TK_M_DEVLINK, /* val */
126 TK_M_ENV, /* val, attr */
127 TK_M_SUBSYSTEM, /* val */
128 TK_M_DRIVER, /* val */
129 TK_M_WAITFOR, /* val */
130 TK_M_ATTR, /* val, attr */
133 TK_M_KERNELS, /* val */
134 TK_M_SUBSYSTEMS, /* val */
135 TK_M_DRIVERS, /* val */
136 TK_M_ATTRS, /* val, attr */
139 TK_M_TEST, /* val, mode_t */
140 TK_M_PROGRAM, /* val */
141 TK_M_IMPORT_FILE, /* val */
142 TK_M_IMPORT_PROG, /* val */
143 TK_M_IMPORT_PARENT, /* val */
144 TK_M_RESULT, /* val */
147 TK_A_STRING_ESCAPE_NONE,
148 TK_A_STRING_ESCAPE_REPLACE,
149 TK_A_INOTIFY_WATCH, /* int */
150 TK_A_NUM_FAKE_PART, /* int */
151 TK_A_DEVLINK_PRIO, /* int */
152 TK_A_OWNER, /* val */
153 TK_A_GROUP, /* val */
155 TK_A_OWNER_ID, /* uid_t */
156 TK_A_GROUP_ID, /* gid_t */
157 TK_A_MODE_ID, /* mode_t */
158 TK_A_ENV, /* val, attr */
160 TK_A_DEVLINK, /* val */
161 TK_A_EVENT_TIMEOUT, /* int */
163 TK_A_ATTR, /* val, attr */
164 TK_A_RUN, /* val, bool */
165 TK_A_GOTO, /* size_t */
170 /* we try to pack stuff in a way that we take only 12 bytes per token */
173 unsigned char type; /* same as in rule and key */
175 enum token_type type:8;
176 unsigned int flags:8;
177 unsigned short token_count;
178 unsigned int label_off;
179 unsigned short filename_off;
180 unsigned short filename_line;
183 enum token_type type:8;
184 enum operation_type op:8;
185 enum string_glob_type glob:8;
186 enum string_subst_type subst:4;
187 enum string_subst_type attrsubst:4;
188 unsigned int value_off;
190 unsigned int attr_off;
193 unsigned int rule_goto;
208 struct udev_rules *rules;
210 struct token token[MAX_TK];
211 unsigned int token_cur;
215 static const char *operation_str(enum operation_type type)
217 static const char *operation_strs[] = {
218 [OP_UNSET] = "UNSET",
219 [OP_MATCH] = "match",
220 [OP_NOMATCH] = "nomatch",
221 [OP_MATCH_MAX] = "MATCH_MAX",
224 [OP_ASSIGN] = "assign",
225 [OP_ASSIGN_FINAL] = "assign-final",
228 return operation_strs[type];
231 static const char *string_glob_str(enum string_glob_type type)
233 static const char *string_glob_strs[] = {
234 [GL_UNSET] = "UNSET",
235 [GL_PLAIN] = "plain",
237 [GL_SPLIT] = "split",
238 [GL_SPLIT_GLOB] = "split-glob",
239 [GL_SOMETHING] = "split-glob",
242 return string_glob_strs[type];
245 static const char *token_str(enum token_type type)
247 static const char *token_strs[] = {
248 [TK_UNSET] = "UNSET",
251 [TK_M_ACTION] = "M ACTION",
252 [TK_M_DEVPATH] = "M DEVPATH",
253 [TK_M_KERNEL] = "M KERNEL",
254 [TK_M_DEVLINK] = "M DEVLINK",
255 [TK_M_NAME] = "M NAME",
256 [TK_M_ENV] = "M ENV",
257 [TK_M_SUBSYSTEM] = "M SUBSYSTEM",
258 [TK_M_DRIVER] = "M DRIVER",
259 [TK_M_WAITFOR] = "M WAITFOR",
260 [TK_M_ATTR] = "M ATTR",
262 [TK_M_PARENTS_MIN] = "M PARENTS_MIN",
263 [TK_M_KERNELS] = "M KERNELS",
264 [TK_M_SUBSYSTEMS] = "M SUBSYSTEMS",
265 [TK_M_DRIVERS] = "M DRIVERS",
266 [TK_M_ATTRS] = "M ATTRS",
267 [TK_M_PARENTS_MAX] = "M PARENTS_MAX",
269 [TK_M_TEST] = "M TEST",
270 [TK_M_PROGRAM] = "M PROGRAM",
271 [TK_M_IMPORT_FILE] = "M IMPORT_FILE",
272 [TK_M_IMPORT_PROG] = "M IMPORT_PROG",
273 [TK_M_IMPORT_PARENT] = "M IMPORT_PARENT",
274 [TK_M_RESULT] = "M RESULT",
275 [TK_M_MAX] = "M MAX",
277 [TK_A_STRING_ESCAPE_NONE] = "A STRING_ESCAPE_NONE",
278 [TK_A_STRING_ESCAPE_REPLACE] = "A STRING_ESCAPE_REPLACE",
279 [TK_A_INOTIFY_WATCH] = "A INOTIFY_WATCH",
280 [TK_A_NUM_FAKE_PART] = "A NUM_FAKE_PART",
281 [TK_A_DEVLINK_PRIO] = "A DEVLINK_PRIO",
282 [TK_A_OWNER] = "A OWNER",
283 [TK_A_GROUP] = "A GROUP",
284 [TK_A_MODE] = "A MODE",
285 [TK_A_OWNER_ID] = "A OWNER_ID",
286 [TK_A_GROUP_ID] = "A GROUP_ID",
287 [TK_A_MODE_ID] = "A MODE_ID",
288 [TK_A_ENV] = "A ENV",
289 [TK_A_NAME] = "A NAME",
290 [TK_A_DEVLINK] = "A DEVLINK",
291 [TK_A_EVENT_TIMEOUT] = "A EVENT_TIMEOUT",
292 [TK_A_IGNORE_REMOVE] = "A IGNORE_REMOVE",
293 [TK_A_ATTR] = "A ATTR",
294 [TK_A_RUN] = "A RUN",
295 [TK_A_GOTO] = "A GOTO",
300 return token_strs[type];
303 static void dump_token(struct udev_rules *rules, struct token *token)
305 enum token_type type = token->type;
306 enum operation_type op = token->key.op;
307 enum string_glob_type glob = token->key.glob;
308 const char *value = &rules->buf[token->key.value_off];
309 const char *attr = &rules->buf[token->key.attr_off];
314 const char *tks_ptr = (char *)rules->tokens;
315 const char *tk_ptr = (char *)token;
316 unsigned int idx = (tk_ptr - tks_ptr) / sizeof(struct token);
318 dbg(rules->udev, "* RULE %s:%u, token: %u, count: %u, label: '%s', flags: 0x%02x\n",
319 &rules->buf[token->rule.filename_off], token->rule.filename_line,
320 idx, token->rule.token_count,
321 &rules->buf[token->rule.label_off],
334 case TK_M_SUBSYSTEMS:
337 case TK_M_IMPORT_FILE:
338 case TK_M_IMPORT_PROG:
339 case TK_M_IMPORT_PARENT:
347 dbg(rules->udev, "%s %s '%s'(%s)\n",
348 token_str(type), operation_str(op), value, string_glob_str(glob));
355 dbg(rules->udev, "%s %s '%s' '%s'(%s)\n",
356 token_str(type), operation_str(op), attr, value, string_glob_str(glob));
358 case TK_A_STRING_ESCAPE_NONE:
359 case TK_A_STRING_ESCAPE_REPLACE:
360 case TK_A_IGNORE_REMOVE:
361 dbg(rules->udev, "%s\n", token_str(type));
364 dbg(rules->udev, "%s %s '%s'(%s) %#o\n",
365 token_str(type), operation_str(op), value, string_glob_str(glob), token->key.mode);
367 case TK_A_INOTIFY_WATCH:
368 dbg(rules->udev, "%s %u\n", token_str(type), token->key.watch);
370 case TK_A_NUM_FAKE_PART:
371 dbg(rules->udev, "%s %u\n", token_str(type), token->key.num_fake_part);
373 case TK_A_DEVLINK_PRIO:
374 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.devlink_prio);
377 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.uid);
380 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.gid);
383 dbg(rules->udev, "%s %s %#o\n", token_str(type), operation_str(op), token->key.mode);
385 case TK_A_EVENT_TIMEOUT:
386 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.event_timeout);
389 dbg(rules->udev, "%s '%s' %u\n", token_str(type), value, token->key.rule_goto);
392 dbg(rules->udev, "* %s\n", token_str(type));
394 case TK_M_PARENTS_MIN:
395 case TK_M_PARENTS_MAX:
398 dbg(rules->udev, "unknown type %u\n", type);
403 static void dump_rules(struct udev_rules *rules)
407 dbg(rules->udev, "dumping %u (%zu bytes) tokens, %u (%zu bytes) strings\n",
409 rules->token_cur * sizeof(struct token),
412 for(i = 0; i < rules->token_cur; i++)
413 dump_token(rules, &rules->tokens[i]);
416 static inline const char *operation_str(enum operation_type type) { return NULL; }
417 static inline const char *token_str(enum token_type type) { return NULL; }
418 static inline void dump_token(struct udev_rules *rules, struct token *token) {}
419 static inline void dump_rules(struct udev_rules *rules) {}
420 #endif /* ENABLE_DEBUG */
422 static int add_new_string(struct udev_rules *rules, const char *str, size_t bytes)
426 /* grow buffer if needed */
427 if (rules->buf_cur + bytes+1 >= rules->buf_max) {
431 /* double the buffer size */
432 add = rules->buf_max;
436 buf = realloc(rules->buf, rules->buf_max + add);
439 dbg(rules->udev, "extend buffer from %zu to %zu\n", rules->buf_max, rules->buf_max + add);
441 rules->buf_max += add;
443 off = rules->buf_cur;
444 memcpy(&rules->buf[rules->buf_cur], str, bytes);
445 rules->buf_cur += bytes;
450 static int add_string(struct udev_rules *rules, const char *str)
452 unsigned int node_idx;
453 struct trie_node *new_node;
454 unsigned int new_node_idx;
459 struct trie_node *parent;
461 /* walk trie, start from last character of str to find matching tails */
465 for (depth = 0; depth <= len; depth++) {
466 struct trie_node *node;
467 unsigned int child_idx;
469 node = &rules->trie_nodes[node_idx];
470 off = node->value_off + node->value_len - len;
472 /* match against current node */
473 if (depth == len || (node->value_len >= len && memcmp(&rules->buf[off], str, len) == 0))
476 /* lookup child node */
477 key = str[len - 1 - depth];
478 child_idx = node->child_idx;
479 while (child_idx > 0) {
480 struct trie_node *child;
482 child = &rules->trie_nodes[child_idx];
483 if (child->key == key)
485 child_idx = child->next_child_idx;
489 node_idx = child_idx;
492 /* string not found, add it */
493 off = add_new_string(rules, str, len + 1);
495 /* grow trie nodes if needed */
496 if (rules->trie_nodes_cur >= rules->trie_nodes_max) {
497 struct trie_node *nodes;
500 /* double the buffer size */
501 add = rules->trie_nodes_max;
505 nodes = realloc(rules->trie_nodes, (rules->trie_nodes_max + add) * sizeof(struct trie_node));
508 dbg(rules->udev, "extend trie nodes from %u to %u\n",
509 rules->trie_nodes_max, rules->trie_nodes_max + add);
510 rules->trie_nodes = nodes;
511 rules->trie_nodes_max += add;
515 new_node_idx = rules->trie_nodes_cur;
516 rules->trie_nodes_cur++;
517 new_node = &rules->trie_nodes[new_node_idx];
518 memset(new_node, 0x00, sizeof(struct trie_node));
519 new_node->value_off = off;
520 new_node->value_len = len;
523 /* join the parent's child list */
524 parent = &rules->trie_nodes[node_idx];
525 if (parent->child_idx == 0) {
526 parent->child_idx = new_node_idx;
528 struct trie_node *last_child;
530 last_child = &rules->trie_nodes[parent->last_child_idx];
531 last_child->next_child_idx = new_node_idx;
533 parent->last_child_idx = new_node_idx;
537 static int add_token(struct udev_rules *rules, struct token *token)
539 /* grow buffer if needed */
540 if (rules->token_cur+1 >= rules->token_max) {
541 struct token *tokens;
544 /* double the buffer size */
545 add = rules->token_max;
549 tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
552 dbg(rules->udev, "extend tokens from %u to %u\n", rules->token_max, rules->token_max + add);
553 rules->tokens = tokens;
554 rules->token_max += add;
556 memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
561 static uid_t add_uid(struct udev_rules *rules, const char *owner)
567 /* lookup, if we know it already */
568 for (i = 0; i < rules->uids_cur; i++) {
569 off = rules->uids[i].name_off;
570 if (strcmp(&rules->buf[off], owner) == 0) {
571 uid = rules->uids[i].uid;
572 dbg(rules->udev, "return existing %u for '%s'\n", uid, owner);
576 uid = util_lookup_user(rules->udev, owner);
578 /* grow buffer if needed */
579 if (rules->uids_cur+1 >= rules->uids_max) {
580 struct uid_gid *uids;
583 /* double the buffer size */
584 add = rules->uids_max;
588 uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
591 dbg(rules->udev, "extend uids from %u to %u\n", rules->uids_max, rules->uids_max + add);
593 rules->uids_max += add;
595 rules->uids[rules->uids_cur].uid = uid;
596 off = add_string(rules, owner);
599 rules->uids[rules->uids_cur].name_off = off;
604 static gid_t add_gid(struct udev_rules *rules, const char *group)
610 /* lookup, if we know it already */
611 for (i = 0; i < rules->gids_cur; i++) {
612 off = rules->gids[i].name_off;
613 if (strcmp(&rules->buf[off], group) == 0) {
614 gid = rules->gids[i].gid;
615 dbg(rules->udev, "return existing %u for '%s'\n", gid, group);
619 gid = util_lookup_group(rules->udev, group);
621 /* grow buffer if needed */
622 if (rules->gids_cur+1 >= rules->gids_max) {
623 struct uid_gid *gids;
626 /* double the buffer size */
627 add = rules->gids_max;
631 gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid));
634 dbg(rules->udev, "extend gids from %u to %u\n", rules->gids_max, rules->gids_max + add);
636 rules->gids_max += add;
638 rules->gids[rules->gids_cur].gid = gid;
639 off = add_string(rules, group);
642 rules->gids[rules->gids_cur].name_off = off;
647 static int import_property_from_string(struct udev_device *dev, char *line)
649 struct udev *udev = udev_device_get_udev(dev);
656 while (isspace(key[0]))
659 /* comment or empty line */
660 if (key[0] == '#' || key[0] == '\0')
663 /* split key/value */
664 val = strchr(key, '=');
671 while (isspace(val[0]))
678 while (isspace(key[len-1]))
682 /* terminate value */
686 while (isspace(val[len-1]))
694 if (val[0] == '"' || val[0] == '\'') {
695 if (val[len-1] != val[0]) {
696 info(udev, "inconsistent quoting: '%s', skip\n", line);
703 dbg(udev, "adding '%s'='%s'\n", key, val);
705 /* handle device, renamed by external tool, returning new path */
706 if (strcmp(key, "DEVPATH") == 0) {
707 char syspath[UTIL_PATH_SIZE];
709 info(udev, "updating devpath from '%s' to '%s'\n",
710 udev_device_get_devpath(dev), val);
711 util_strscpyl(syspath, sizeof(syspath), udev_get_sys_path(udev), val, NULL);
712 udev_device_set_syspath(dev, syspath);
714 struct udev_list_entry *entry;
716 entry = udev_device_add_property(dev, key, val);
717 /* store in db, skip private keys */
719 udev_list_entry_set_flag(entry, 1);
724 static int import_file_into_properties(struct udev_device *dev, const char *filename)
727 char line[UTIL_LINE_SIZE];
729 f = fopen(filename, "r");
732 while (fgets(line, sizeof(line), f) != NULL)
733 import_property_from_string(dev, line);
738 static int import_program_into_properties(struct udev_device *dev, const char *program)
740 struct udev *udev = udev_device_get_udev(dev);
746 envp = udev_device_get_properties_envp(dev);
747 if (util_run_program(udev, program, envp, result, sizeof(result), &reslen, NULL) != 0)
751 while (line != NULL) {
754 pos = strchr(line, '\n');
759 import_property_from_string(dev, line);
765 static int import_parent_into_properties(struct udev_device *dev, const char *filter)
767 struct udev *udev = udev_device_get_udev(dev);
768 struct udev_device *dev_parent;
769 struct udev_list_entry *list_entry;
771 dev_parent = udev_device_get_parent(dev);
772 if (dev_parent == NULL)
775 dbg(udev, "found parent '%s', get the node name\n", udev_device_get_syspath(dev_parent));
776 udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
777 const char *key = udev_list_entry_get_name(list_entry);
778 const char *val = udev_list_entry_get_value(list_entry);
780 if (fnmatch(filter, key, 0) == 0) {
781 struct udev_list_entry *entry;
783 dbg(udev, "import key '%s=%s'\n", key, val);
784 entry = udev_device_add_property(dev, key, val);
785 /* store in db, skip private keys */
787 udev_list_entry_set_flag(entry, 1);
793 #define WAIT_LOOP_PER_SECOND 50
794 static int wait_for_file(struct udev_device *dev, const char *file, int timeout)
796 struct udev *udev = udev_device_get_udev(dev);
797 char filepath[UTIL_PATH_SIZE];
798 char devicepath[UTIL_PATH_SIZE];
800 int loop = timeout * WAIT_LOOP_PER_SECOND;
802 /* a relative path is a device attribute */
803 devicepath[0] = '\0';
804 if (file[0] != '/') {
805 util_strscpyl(devicepath, sizeof(devicepath),
806 udev_get_sys_path(udev), udev_device_get_devpath(dev), NULL);
807 util_strscpyl(filepath, sizeof(filepath), devicepath, "/", file, NULL);
811 dbg(udev, "will wait %i sec for '%s'\n", timeout, file);
813 const struct timespec duration = { 0, 1000 * 1000 * 1000 / WAIT_LOOP_PER_SECOND };
816 if (stat(file, &stats) == 0) {
817 info(udev, "file '%s' appeared after %i loops\n", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
820 /* make sure, the device did not disappear in the meantime */
821 if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
822 info(udev, "device disappeared while waiting for '%s'\n", file);
825 info(udev, "wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND);
826 nanosleep(&duration, NULL);
828 info(udev, "waiting for '%s' failed\n", file);
832 static int attr_subst_subdir(char *attr, size_t len)
836 if (strstr(attr, "/*/")) {
838 char dirname[UTIL_PATH_SIZE];
842 util_strscpy(dirname, sizeof(dirname), attr);
843 pos = strstr(dirname, "/*/");
848 dir = opendir(dirname);
852 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
855 if (dent->d_name[0] == '.')
857 util_strscpyl(attr, len, dirname, "/", dent->d_name, tail, NULL);
858 if (stat(attr, &stats) == 0) {
870 static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value)
876 if (linepos == NULL || linepos[0] == '\0')
879 /* skip whitespace */
880 while (isspace(linepos[0]) || linepos[0] == ',')
884 if (linepos[0] == '\0')
890 if (linepos[0] == '\0')
892 if (isspace(linepos[0]))
894 if (linepos[0] == '=')
896 if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
897 if (linepos[1] == '=')
901 /* remember end of key */
904 /* skip whitespace after key */
905 while (isspace(linepos[0]))
907 if (linepos[0] == '\0')
910 /* get operation type */
911 if (linepos[0] == '=' && linepos[1] == '=') {
914 } else if (linepos[0] == '!' && linepos[1] == '=') {
917 } else if (linepos[0] == '+' && linepos[1] == '=') {
920 } else if (linepos[0] == '=') {
923 } else if (linepos[0] == ':' && linepos[1] == '=') {
924 *op = OP_ASSIGN_FINAL;
932 /* skip whitespace after operator */
933 while (isspace(linepos[0]))
935 if (linepos[0] == '\0')
939 if (linepos[0] == '"')
946 temp = strchr(linepos, '"');
951 dbg(udev, "%s '%s'-'%s'\n", operation_str(*op), *key, *value);
953 /* move line to next key */
958 /* extract possible KEY{attr} */
959 static char *get_key_attribute(struct udev *udev, char *str)
964 attr = strchr(str, '{');
967 pos = strchr(attr, '}');
969 err(udev, "missing closing brace for format\n");
973 dbg(udev, "attribute='%s'\n", attr);
979 static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
980 enum operation_type op,
981 const char *value, const void *data)
983 struct token *token = &rule_tmp->token[rule_tmp->token_cur];
984 const char *attr = NULL;
986 memset(token, 0x00, sizeof(struct token));
998 case TK_M_SUBSYSTEMS:
1001 case TK_M_IMPORT_FILE:
1002 case TK_M_IMPORT_PROG:
1003 case TK_M_IMPORT_PARENT:
1010 token->key.value_off = add_string(rule_tmp->rules, value);
1018 token->key.value_off = add_string(rule_tmp->rules, value);
1019 token->key.attr_off = add_string(rule_tmp->rules, attr);
1022 token->key.value_off = add_string(rule_tmp->rules, value);
1023 token->key.devlink_unique = *(int *)data;
1026 token->key.value_off = add_string(rule_tmp->rules, value);
1028 token->key.mode = *(mode_t *)data;
1030 case TK_A_STRING_ESCAPE_NONE:
1031 case TK_A_STRING_ESCAPE_REPLACE:
1032 case TK_A_IGNORE_REMOVE:
1035 token->key.value_off = add_string(rule_tmp->rules, value);
1036 token->key.fail_on_error = *(int *)data;
1038 case TK_A_INOTIFY_WATCH:
1039 case TK_A_NUM_FAKE_PART:
1040 case TK_A_DEVLINK_PRIO:
1041 token->key.devlink_prio = *(int *)data;
1044 token->key.uid = *(uid_t *)data;
1047 token->key.gid = *(gid_t *)data;
1050 token->key.mode = *(mode_t *)data;
1052 case TK_A_EVENT_TIMEOUT:
1053 token->key.event_timeout = *(int *)data;
1056 case TK_M_PARENTS_MIN:
1057 case TK_M_PARENTS_MAX:
1061 err(rule_tmp->rules->udev, "wrong type %u\n", type);
1065 if (value != NULL && type < TK_M_MAX) {
1066 /* check if we need to split or call fnmatch() while matching rules */
1067 enum string_glob_type glob;
1071 has_split = (strchr(value, '|') != NULL);
1072 has_glob = (strchr(value, '*') != NULL || strchr(value, '?') != NULL || strchr(value, '[') != NULL);
1073 if (has_split && has_glob) {
1074 glob = GL_SPLIT_GLOB;
1075 } else if (has_split) {
1077 } else if (has_glob) {
1078 if (strcmp(value, "?*") == 0)
1079 glob = GL_SOMETHING;
1085 token->key.glob = glob;
1088 if (value != NULL && type > TK_M_MAX) {
1089 /* check if assigned value has substitution chars */
1090 if (value[0] == '[')
1091 token->key.subst = SB_SUBSYS;
1092 else if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
1093 token->key.subst = SB_FORMAT;
1095 token->key.subst = SB_NONE;
1099 /* check if property/attribut name has substitution chars */
1101 token->key.attrsubst = SB_SUBSYS;
1102 else if (strchr(attr, '%') != NULL || strchr(attr, '$') != NULL)
1103 token->key.attrsubst = SB_FORMAT;
1105 token->key.attrsubst = SB_NONE;
1108 token->key.type = type;
1110 rule_tmp->token_cur++;
1111 if (rule_tmp->token_cur >= ARRAY_SIZE(rule_tmp->token)) {
1112 err(rule_tmp->rules->udev, "temporary rule array too small\n");
1118 static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp)
1121 unsigned int start = 0;
1122 unsigned int end = rule_tmp->token_cur;
1124 for (i = 0; i < rule_tmp->token_cur; i++) {
1125 enum token_type next_val = TK_UNSET;
1126 unsigned int next_idx = 0;
1129 /* find smallest value */
1130 for (j = start; j < end; j++) {
1131 if (rule_tmp->token[j].type == TK_UNSET)
1133 if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
1134 next_val = rule_tmp->token[j].type;
1139 /* add token and mark done */
1140 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
1142 rule_tmp->token[next_idx].type = TK_UNSET;
1145 if (next_idx == start)
1147 if (next_idx+1 == end)
1153 static int add_rule(struct udev_rules *rules, char *line,
1154 const char *filename, unsigned int filename_off, unsigned int lineno)
1158 struct rule_tmp rule_tmp;
1160 memset(&rule_tmp, 0x00, sizeof(struct rule_tmp));
1161 rule_tmp.rules = rules;
1162 rule_tmp.rule.type = TK_RULE;
1163 rule_tmp.rule.rule.filename_off = filename_off;
1164 rule_tmp.rule.rule.filename_line = lineno;
1170 enum operation_type op;
1172 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0)
1175 if (strcmp(key, "ACTION") == 0) {
1176 if (op > OP_MATCH_MAX) {
1177 err(rules->udev, "invalid ACTION operation\n");
1180 rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL);
1184 if (strcmp(key, "DEVPATH") == 0) {
1185 if (op > OP_MATCH_MAX) {
1186 err(rules->udev, "invalid DEVPATH operation\n");
1189 rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
1193 if (strcmp(key, "KERNEL") == 0) {
1194 if (op > OP_MATCH_MAX) {
1195 err(rules->udev, "invalid KERNEL operation\n");
1198 rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL);
1202 if (strcmp(key, "SUBSYSTEM") == 0) {
1203 if (op > OP_MATCH_MAX) {
1204 err(rules->udev, "invalid SUBSYSTEM operation\n");
1207 /* bus, class, subsystem events should all be the same */
1208 if (strcmp(value, "subsystem") == 0 ||
1209 strcmp(value, "bus") == 0 ||
1210 strcmp(value, "class") == 0) {
1211 if (strcmp(value, "bus") == 0 || strcmp(value, "class") == 0)
1212 err(rules->udev, "'%s' must be specified as 'subsystem' \n"
1213 "please fix it in %s:%u", value, filename, lineno);
1214 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
1216 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
1220 if (strcmp(key, "DRIVER") == 0) {
1221 if (op > OP_MATCH_MAX) {
1222 err(rules->udev, "invalid DRIVER operation\n");
1225 rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL);
1229 if (strncmp(key, "ATTR{", sizeof("ATTR{")-1) == 0) {
1230 attr = get_key_attribute(rules->udev, key + sizeof("ATTR")-1);
1232 err(rules->udev, "error parsing ATTR attribute\n");
1235 if (op < OP_MATCH_MAX) {
1236 rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
1238 rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr);
1243 if (strcmp(key, "KERNELS") == 0 ||
1244 strcmp(key, "ID") == 0) {
1245 if (op > OP_MATCH_MAX) {
1246 err(rules->udev, "invalid KERNELS operation\n");
1249 rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1253 if (strcmp(key, "SUBSYSTEMS") == 0 ||
1254 strcmp(key, "BUS") == 0) {
1255 if (op > OP_MATCH_MAX) {
1256 err(rules->udev, "invalid SUBSYSTEMS operation\n");
1259 rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1263 if (strcmp(key, "DRIVERS") == 0) {
1264 if (op > OP_MATCH_MAX) {
1265 err(rules->udev, "invalid DRIVERS operation\n");
1268 rule_add_key(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
1272 if (strncmp(key, "ATTRS{", sizeof("ATTRS{")-1) == 0 ||
1273 strncmp(key, "SYSFS{", sizeof("SYSFS{")-1) == 0) {
1274 if (op > OP_MATCH_MAX) {
1275 err(rules->udev, "invalid ATTRS operation\n");
1278 attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
1280 err(rules->udev, "error parsing ATTRS attribute\n");
1283 if (strncmp(attr, "device/", 7) == 0)
1284 err(rules->udev, "the 'device' link may not be available in a future kernel, "
1285 "please fix it in %s:%u", filename, lineno);
1286 else if (strstr(attr, "../") != NULL)
1287 err(rules->udev, "do not reference parent sysfs directories directly, "
1288 "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
1289 rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1293 if (strncmp(key, "ENV{", sizeof("ENV{")-1) == 0) {
1294 attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1);
1296 err(rules->udev, "error parsing ENV attribute\n");
1299 if (op < OP_MATCH_MAX) {
1300 if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
1303 if (rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
1309 if (strcmp(key, "PROGRAM") == 0) {
1310 rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
1314 if (strcmp(key, "RESULT") == 0) {
1315 if (op > OP_MATCH_MAX) {
1316 err(rules->udev, "invalid RESULT operation\n");
1319 rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL);
1323 if (strncmp(key, "IMPORT", sizeof("IMPORT")-1) == 0) {
1324 attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1);
1325 if (attr != NULL && strstr(attr, "program")) {
1326 dbg(rules->udev, "IMPORT will be executed\n");
1327 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1328 } else if (attr != NULL && strstr(attr, "file")) {
1329 dbg(rules->udev, "IMPORT will be included as file\n");
1330 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1331 } else if (attr != NULL && strstr(attr, "parent")) {
1332 dbg(rules->udev, "IMPORT will include the parent values\n");
1333 rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
1335 /* figure it out if it is executable */
1336 char file[UTIL_PATH_SIZE];
1338 struct stat statbuf;
1340 /* allow programs in /lib/udev called without the path */
1341 if (value[0] != '/')
1342 util_strscpyl(file, sizeof(file), LIBEXECDIR "/", value, NULL);
1344 util_strscpy(file, sizeof(file), value);
1345 pos = strchr(file, ' ');
1348 dbg(rules->udev, "IMPORT auto mode for '%s'\n", file);
1349 if (stat(file, &statbuf) == 0 && (statbuf.st_mode & S_IXUSR)) {
1350 dbg(rules->udev, "IMPORT will be executed (autotype)\n");
1351 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1353 dbg(rules->udev, "IMPORT will be included as file (autotype)\n");
1354 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1360 if (strncmp(key, "TEST", sizeof("TEST")-1) == 0) {
1363 if (op > OP_MATCH_MAX) {
1364 err(rules->udev, "invalid TEST operation\n");
1367 attr = get_key_attribute(rules->udev, key + sizeof("TEST")-1);
1369 mode = strtol(attr, NULL, 8);
1370 rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode);
1372 rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL);
1377 if (strncmp(key, "RUN", sizeof("RUN")-1) == 0) {
1380 attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1);
1381 if (attr != NULL && strstr(attr, "fail_event_on_error"))
1383 rule_add_key(&rule_tmp, TK_A_RUN, op, value, &flag);
1387 if (strcmp(key, "WAIT_FOR") == 0 || strcmp(key, "WAIT_FOR_SYSFS") == 0) {
1388 rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1392 if (strcmp(key, "LABEL") == 0) {
1393 rule_tmp.rule.rule.label_off = add_string(rules, value);
1397 if (strcmp(key, "GOTO") == 0) {
1398 rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1402 if (strncmp(key, "NAME", sizeof("NAME")-1) == 0) {
1403 if (op < OP_MATCH_MAX) {
1404 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
1406 if (value[0] == '\0')
1407 info(rules->udev, "name empty, node creation suppressed\n");
1408 else if (strcmp(value, "%k") == 0)
1409 err(rules->udev, "NAME=\"%%k\" is superfluous and breaks "
1410 "kernel supplied names, please remove it from %s:%u\n", filename, lineno);
1411 rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL);
1412 attr = get_key_attribute(rules->udev, key + sizeof("NAME")-1);
1414 if (strstr(attr, "all_partitions") != NULL) {
1415 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1417 dbg(rules->udev, "creation of partition nodes requested\n");
1418 rule_add_key(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1420 if (strstr(attr, "ignore_remove") != NULL) {
1421 dbg(rules->udev, "remove event should be ignored\n");
1422 rule_add_key(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1426 rule_tmp.rule.rule.flags = 1;
1430 if (strncmp(key, "SYMLINK", sizeof("SYMLINK")-1) == 0) {
1431 if (op < OP_MATCH_MAX) {
1432 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
1436 attr = get_key_attribute(rules->udev, key + sizeof("SYMLINK")-1);
1437 if (attr != NULL && strstr(attr, "unique") != NULL)
1439 rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, &flag);
1441 rule_tmp.rule.rule.flags = 1;
1445 if (strcmp(key, "OWNER") == 0) {
1449 uid = strtoul(value, &endptr, 10);
1450 if (endptr[0] == '\0') {
1451 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1452 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1453 uid = add_uid(rules, value);
1454 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1455 } else if (rules->resolve_names >= 0) {
1456 rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
1458 rule_tmp.rule.rule.flags = 1;
1462 if (strcmp(key, "GROUP") == 0) {
1466 gid = strtoul(value, &endptr, 10);
1467 if (endptr[0] == '\0') {
1468 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1469 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1470 gid = add_gid(rules, value);
1471 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1472 } else if (rules->resolve_names >= 0) {
1473 rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
1475 rule_tmp.rule.rule.flags = 1;
1479 if (strcmp(key, "MODE") == 0) {
1483 mode = strtol(value, &endptr, 8);
1484 if (endptr[0] == '\0')
1485 rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1487 rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
1488 rule_tmp.rule.rule.flags = 1;
1492 if (strcmp(key, "OPTIONS") == 0) {
1495 if (strstr(value, "ignore_remove") != NULL) {
1496 dbg(rules->udev, "remove event should be ignored\n");
1497 rule_add_key(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1499 pos = strstr(value, "link_priority=");
1501 int prio = atoi(&pos[strlen("link_priority=")]);
1503 rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, 0, NULL, &prio);
1504 dbg(rules->udev, "link priority=%i\n", prio);
1506 pos = strstr(value, "event_timeout=");
1508 int tout = atoi(&pos[strlen("event_timeout=")]);
1510 rule_add_key(&rule_tmp, TK_A_EVENT_TIMEOUT, 0, NULL, &tout);
1511 dbg(rules->udev, "event timeout=%i\n", tout);
1513 pos = strstr(value, "string_escape=");
1515 pos = &pos[strlen("string_escape=")];
1516 if (strncmp(pos, "none", strlen("none")) == 0)
1517 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, 0, NULL, NULL);
1518 else if (strncmp(pos, "replace", strlen("replace")) == 0)
1519 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, 0, NULL, NULL);
1521 if (strstr(value, "all_partitions") != NULL) {
1522 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1524 rule_add_key(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1525 dbg(rules->udev, "creation of partition nodes requested\n");
1527 pos = strstr(value, "nowatch");
1531 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, 0, NULL, &off);
1532 dbg(rules->udev, "inotify watch of device disabled\n");
1534 pos = strstr(value, "watch");
1538 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, 0, NULL, &on);
1539 dbg(rules->udev, "inotify watch of device requested\n");
1544 err(rules->udev, "unknown key '%s' in %s:%u\n", key, filename, lineno);
1547 /* add rule token */
1548 rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur;
1549 if (add_token(rules, &rule_tmp.rule) != 0)
1552 /* add tokens to list, sorted by type */
1553 if (sort_token(rules, &rule_tmp) != 0)
1558 err(rules->udev, "invalid rule '%s:%u'\n", filename, lineno);
1562 static int parse_file(struct udev_rules *rules, const char *filename, unsigned short filename_off)
1565 unsigned int first_token;
1566 char line[UTIL_LINE_SIZE];
1570 info(rules->udev, "reading '%s' as rules file\n", filename);
1572 f = fopen(filename, "r");
1576 first_token = rules->token_cur;
1578 while (fgets(line, sizeof(line), f) != NULL) {
1582 /* skip whitespace */
1585 while (isspace(key[0]))
1596 /* continue reading if backslash+newline is found */
1597 while (line[len-2] == '\\') {
1598 if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1600 if (strlen(&line[len-2]) < 2)
1606 if (len+1 >= sizeof(line)) {
1607 err(rules->udev, "line too long '%s':%u, ignored\n", filename, line_nr);
1610 add_rule(rules, key, filename, filename_off, line_nr);
1614 /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1615 for (i = first_token+1; i < rules->token_cur; i++) {
1616 if (rules->tokens[i].type == TK_A_GOTO) {
1617 char *label = &rules->buf[rules->tokens[i].key.value_off];
1620 for (j = i+1; j < rules->token_cur; j++) {
1621 if (rules->tokens[j].type != TK_RULE)
1623 if (rules->tokens[j].rule.label_off == 0)
1625 if (strcmp(label, &rules->buf[rules->tokens[j].rule.label_off]) != 0)
1627 rules->tokens[i].key.rule_goto = j;
1630 if (rules->tokens[i].key.rule_goto == 0)
1631 err(rules->udev, "GOTO '%s' has no matching label in: '%s'\n", label, filename);
1637 static int add_matching_files(struct udev *udev, struct udev_list_node *file_list, const char *dirname, const char *suffix)
1640 char filename[UTIL_PATH_SIZE];
1642 dbg(udev, "open directory '%s'\n", dirname);
1643 dir = opendir(dirname);
1645 info(udev, "unable to open '%s': %m\n", dirname);
1650 struct dirent *dent;
1652 dent = readdir(dir);
1653 if (dent == NULL || dent->d_name[0] == '\0')
1656 if (dent->d_name[0] == '.')
1659 /* look for file matching with specified suffix */
1660 if (suffix != NULL) {
1663 ext = strrchr(dent->d_name, '.');
1666 if (strcmp(ext, suffix) != 0)
1669 util_strscpyl(filename, sizeof(filename), dirname, "/", dent->d_name, NULL);
1670 dbg(udev, "put file '%s' into list\n", filename);
1671 udev_list_entry_add(udev, file_list, filename, NULL, 1, 1);
1678 struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
1680 struct udev_rules *rules;
1681 struct stat statbuf;
1682 struct udev_list_node file_list;
1683 struct udev_list_entry *file_loop, *file_tmp;
1684 struct token end_token;
1686 rules = malloc(sizeof(struct udev_rules));
1689 memset(rules, 0x00, sizeof(struct udev_rules));
1691 rules->resolve_names = resolve_names;
1692 udev_list_init(&file_list);
1694 /* init token array and string buffer */
1695 rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
1696 if (rules->tokens == NULL)
1698 rules->token_max = PREALLOC_TOKEN;
1700 rules->buf = malloc(PREALLOC_STRBUF);
1701 if (rules->buf == NULL)
1703 rules->buf_max = PREALLOC_STRBUF;
1704 /* offset 0 is always '\0' */
1705 rules->buf[0] = '\0';
1707 dbg(udev, "prealloc %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1708 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1710 rules->trie_nodes = malloc(PREALLOC_TRIE * sizeof(struct trie_node));
1711 if (rules->trie_nodes == NULL)
1713 rules->trie_nodes_max = PREALLOC_TRIE;
1714 /* offset 0 is the trie root, with an empty string */
1715 memset(rules->trie_nodes, 0x00, sizeof(struct trie_node));
1716 rules->trie_nodes_cur = 1;
1718 if (udev_get_rules_path(udev) != NULL) {
1719 /* custom rules location for testing */
1720 add_matching_files(udev, &file_list, udev_get_rules_path(udev), ".rules");
1722 char filename[PATH_MAX];
1723 struct udev_list_node sort_list;
1724 struct udev_list_entry *sort_loop, *sort_tmp;
1726 /* read user/custom rules */
1727 add_matching_files(udev, &file_list, SYSCONFDIR "/udev/rules.d", ".rules");
1729 /* read dynamic/temporary rules */
1730 util_strscpyl(filename, sizeof(filename), udev_get_dev_path(udev), "/.udev/rules.d", NULL);
1731 udev_list_init(&sort_list);
1732 add_matching_files(udev, &sort_list, filename, ".rules");
1734 /* read default rules */
1735 add_matching_files(udev, &sort_list, LIBEXECDIR "/rules.d", ".rules");
1737 /* sort all rules files by basename into list of files */
1738 udev_list_entry_foreach_safe(sort_loop, sort_tmp, udev_list_get_entry(&sort_list)) {
1739 const char *sort_name = udev_list_entry_get_name(sort_loop);
1740 const char *sort_base = strrchr(sort_name, '/');
1742 if (sort_base == NULL)
1744 /* sort entry into existing list */
1745 udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1746 const char *file_name = udev_list_entry_get_name(file_loop);
1747 const char *file_base = strrchr(file_name, '/');
1749 if (file_base == NULL)
1751 if (strcmp(file_base, sort_base) == 0) {
1752 info(udev, "rule file basename '%s' already added, ignoring '%s'\n",
1753 file_name, sort_name);
1754 udev_list_entry_delete(sort_loop);
1758 if (strcmp(file_base, sort_base) > 0) {
1759 /* found later file, insert before */
1760 udev_list_entry_remove(sort_loop);
1761 udev_list_entry_insert_before(sort_loop, file_loop);
1766 /* current file already handled */
1767 if (sort_loop == NULL)
1769 /* no later file, append to end of list */
1770 udev_list_entry_remove(sort_loop);
1771 udev_list_entry_append(sort_loop, &file_list);
1775 /* add all filenames to the string buffer */
1776 udev_list_entry_foreach(file_loop, udev_list_get_entry(&file_list)) {
1777 const char *filename = udev_list_entry_get_name(file_loop);
1778 unsigned int filename_off;
1780 filename_off = add_string(rules, filename);
1781 /* the offset in the rule is limited to unsigned short */
1782 if (filename_off < USHRT_MAX)
1783 udev_list_entry_set_flag(file_loop, filename_off);
1786 /* parse list of files */
1787 udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1788 const char *filename = udev_list_entry_get_name(file_loop);
1789 unsigned int filename_off = udev_list_entry_get_flag(file_loop);
1791 if (stat(filename, &statbuf) == 0 && statbuf.st_size > 0)
1792 parse_file(rules, filename, filename_off);
1794 err(udev, "can not read '%s'\n", filename);
1795 udev_list_entry_delete(file_loop);
1798 memset(&end_token, 0x00, sizeof(struct token));
1799 end_token.type = TK_END;
1800 add_token(rules, &end_token);
1802 /* shrink allocated token and string buffer */
1803 if (rules->token_cur < rules->token_max) {
1804 struct token *tokens;
1806 tokens = realloc(rules->tokens, rules->token_cur * sizeof(struct token));
1807 if (tokens != NULL || rules->token_cur == 0) {
1808 rules->tokens = tokens;
1809 rules->token_max = rules->token_cur;
1812 if (rules->buf_cur < rules->buf_max) {
1815 buf = realloc(rules->buf, rules->buf_cur);
1816 if (buf != NULL || rules->buf_cur == 0) {
1818 rules->buf_max = rules->buf_cur;
1821 info(udev, "rules use %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1822 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1823 info(udev, "temporary index used %zu bytes (%u * %zu bytes)\n",
1824 rules->trie_nodes_cur * sizeof(struct trie_node),
1825 rules->trie_nodes_cur, sizeof(struct trie_node));
1828 free(rules->trie_nodes);
1829 rules->trie_nodes = NULL;
1830 rules->trie_nodes_cur = 0;
1831 rules->trie_nodes_max = 0;
1833 /* cleanup uid/gid cache */
1836 rules->uids_cur = 0;
1837 rules->uids_max = 0;
1840 rules->gids_cur = 0;
1841 rules->gids_max = 0;
1847 void udev_rules_unref(struct udev_rules *rules)
1851 free(rules->tokens);
1853 free(rules->trie_nodes);
1859 static int match_key(struct udev_rules *rules, struct token *token, const char *val)
1861 char *key_value = &rules->buf[token->key.value_off];
1868 switch (token->key.glob) {
1870 match = (strcmp(key_value, val) == 0);
1873 match = (fnmatch(key_value, val, 0) == 0);
1880 split = &rules->buf[token->key.value_off];
1885 next = strchr(split, '|');
1887 size_t matchlen = (size_t)(next - split);
1889 match = (matchlen == len && strncmp(split, val, matchlen) == 0);
1893 match = (strcmp(split, val) == 0);
1902 char value[UTIL_PATH_SIZE];
1904 util_strscpy(value, sizeof(value), &rules->buf[token->key.value_off]);
1906 while (key_value != NULL) {
1907 pos = strchr(key_value, '|');
1912 dbg(rules->udev, "match %s '%s' <-> '%s'\n", token_str(token->type), key_value, val);
1913 match = (fnmatch(key_value, val, 0) == 0);
1921 match = (val[0] != '\0');
1927 if (match && (token->key.op == OP_MATCH)) {
1928 dbg(rules->udev, "%s is true (matching value)\n", token_str(token->type));
1931 if (!match && (token->key.op == OP_NOMATCH)) {
1932 dbg(rules->udev, "%s is true (non-matching value)\n", token_str(token->type));
1935 dbg(rules->udev, "%s is not true\n", token_str(token->type));
1939 static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur)
1942 char nbuf[UTIL_NAME_SIZE];
1944 char vbuf[UTIL_NAME_SIZE];
1947 name = &rules->buf[cur->key.attr_off];
1948 switch (cur->key.attrsubst) {
1950 udev_event_apply_format(event, name, nbuf, sizeof(nbuf));
1954 value = udev_device_get_sysattr_value(dev, name);
1959 if (util_resolve_subsys_kernel(event->udev, name, vbuf, sizeof(vbuf), 1) != 0)
1967 /* remove trailing whitespace, if not asked to match for it */
1968 len = strlen(value);
1969 if (len > 0 && isspace(value[len-1])) {
1970 const char *key_value;
1973 key_value = &rules->buf[cur->key.value_off];
1974 klen = strlen(key_value);
1975 if (klen > 0 && !isspace(key_value[klen-1])) {
1976 if (value != vbuf) {
1977 util_strscpy(vbuf, sizeof(vbuf), value);
1980 while (len > 0 && isspace(vbuf[--len]))
1982 dbg(rules->udev, "removed trailing whitespace from '%s'\n", value);
1986 return match_key(rules, cur, value);
1995 int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event)
1999 enum escape_type esc = ESCAPE_UNSET;
2002 if (rules->tokens == NULL)
2005 can_set_name = ((strcmp(udev_device_get_action(event->dev), "add") == 0 ||
2006 strcmp(udev_device_get_action(event->dev), "change") == 0) &&
2007 (major(udev_device_get_devnum(event->dev)) > 0 ||
2008 strcmp(udev_device_get_subsystem(event->dev), "net") == 0));
2010 /* loop through token list, match, run actions or forward to next rule */
2011 cur = &rules->tokens[0];
2014 dump_token(rules, cur);
2015 switch (cur->type) {
2019 /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
2020 if (!can_set_name && rule->rule.flags)
2025 if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
2029 if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
2033 if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
2038 size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
2039 struct udev_list_entry *list_entry;
2042 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
2043 const char *devlink;
2045 devlink = &udev_list_entry_get_name(list_entry)[devlen];
2046 if (match_key(rules, cur, devlink) == 0) {
2056 if (match_key(rules, cur, event->name) != 0)
2061 const char *key_name = &rules->buf[cur->key.attr_off];
2064 value = udev_device_get_property_value(event->dev, key_name);
2065 if (value == NULL) {
2066 dbg(event->udev, "ENV{%s} is not set, treat as empty\n", key_name);
2069 if (match_key(rules, cur, value))
2073 case TK_M_SUBSYSTEM:
2074 if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
2078 if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
2083 char filename[UTIL_PATH_SIZE];
2086 udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename));
2087 found = (wait_for_file(event->dev, filename, 10) == 0);
2088 if (!found && (cur->key.op != OP_NOMATCH))
2093 if (match_attr(rules, event->dev, event, cur) != 0)
2097 case TK_M_SUBSYSTEMS:
2103 /* get whole sequence of parent matches */
2105 while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX)
2108 /* loop over parents */
2109 event->dev_parent = event->dev;
2113 dbg(event->udev, "parent: '%s'\n", udev_device_get_syspath(event->dev_parent));
2114 /* loop over sequence of parent match keys */
2115 for (key = cur; key < next; key++ ) {
2116 dump_token(rules, key);
2119 if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
2122 case TK_M_SUBSYSTEMS:
2123 if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
2127 if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
2131 if (match_attr(rules, event->dev_parent, event, key) != 0)
2137 dbg(event->udev, "parent key matched\n");
2139 dbg(event->udev, "all parent keys matched\n");
2140 /* all keys matched */
2144 event->dev_parent = udev_device_get_parent(event->dev_parent);
2145 if (event->dev_parent == NULL)
2148 /* move behind our sequence of parent match keys */
2154 char filename[UTIL_PATH_SIZE];
2155 struct stat statbuf;
2158 udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename));
2159 if (util_resolve_subsys_kernel(event->udev, filename, filename, sizeof(filename), 0) != 0) {
2160 if (filename[0] != '/') {
2161 char tmp[UTIL_PATH_SIZE];
2163 util_strscpy(tmp, sizeof(tmp), filename);
2164 util_strscpyl(filename, sizeof(filename),
2165 udev_device_get_syspath(event->dev), "/", tmp, NULL);
2168 attr_subst_subdir(filename, sizeof(filename));
2170 match = (stat(filename, &statbuf) == 0);
2171 dbg(event->udev, "'%s' %s", filename, match ? "exists\n" : "does not exist\n");
2172 if (match && cur->key.mode > 0) {
2173 match = ((statbuf.st_mode & cur->key.mode) > 0);
2174 dbg(event->udev, "'%s' has mode=%#o and %s %#o\n", filename, statbuf.st_mode,
2175 match ? "matches" : "does not match", cur->key.mode);
2177 if (match && cur->key.op == OP_NOMATCH)
2179 if (!match && cur->key.op == OP_MATCH)
2185 char program[UTIL_PATH_SIZE];
2187 char result[UTIL_PATH_SIZE];
2189 free(event->program_result);
2190 event->program_result = NULL;
2191 udev_event_apply_format(event, &rules->buf[cur->key.value_off], program, sizeof(program));
2192 envp = udev_device_get_properties_envp(event->dev);
2193 info(event->udev, "PROGRAM '%s' %s:%u\n",
2195 &rules->buf[rule->rule.filename_off],
2196 rule->rule.filename_line);
2197 if (util_run_program(event->udev, program, envp, result, sizeof(result), NULL, NULL) != 0) {
2198 if (cur->key.op != OP_NOMATCH)
2203 util_remove_trailing_chars(result, '\n');
2204 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2205 count = udev_util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
2207 info(event->udev, "%i character(s) replaced\n" , count);
2209 event->program_result = strdup(result);
2210 dbg(event->udev, "storing result '%s'\n", event->program_result);
2211 if (cur->key.op == OP_NOMATCH)
2216 case TK_M_IMPORT_FILE:
2218 char import[UTIL_PATH_SIZE];
2220 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2221 if (import_file_into_properties(event->dev, import) != 0)
2222 if (cur->key.op != OP_NOMATCH)
2226 case TK_M_IMPORT_PROG:
2228 char import[UTIL_PATH_SIZE];
2230 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2231 info(event->udev, "IMPORT '%s' %s:%u\n",
2233 &rules->buf[rule->rule.filename_off],
2234 rule->rule.filename_line);
2235 if (import_program_into_properties(event->dev, import) != 0)
2236 if (cur->key.op != OP_NOMATCH)
2240 case TK_M_IMPORT_PARENT:
2242 char import[UTIL_PATH_SIZE];
2244 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2245 if (import_parent_into_properties(event->dev, import) != 0)
2246 if (cur->key.op != OP_NOMATCH)
2251 if (match_key(rules, cur, event->program_result) != 0)
2254 case TK_A_STRING_ESCAPE_NONE:
2257 case TK_A_STRING_ESCAPE_REPLACE:
2258 esc = ESCAPE_REPLACE;
2260 case TK_A_NUM_FAKE_PART:
2261 if (strcmp(udev_device_get_subsystem(event->dev), "block") != 0)
2263 if (udev_device_get_sysnum(event->dev) != NULL)
2265 udev_device_set_num_fake_partitions(event->dev, cur->key.num_fake_part);
2267 case TK_A_INOTIFY_WATCH:
2268 event->inotify_watch = cur->key.watch;
2270 case TK_A_DEVLINK_PRIO:
2271 udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
2275 char owner[UTIL_NAME_SIZE];
2277 if (event->owner_final)
2279 if (cur->key.op == OP_ASSIGN_FINAL)
2280 event->owner_final = 1;
2281 udev_event_apply_format(event, &rules->buf[cur->key.value_off], 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 udev_event_apply_format(event, &rules->buf[cur->key.value_off], group, sizeof(group));
2298 event->gid = util_lookup_group(event->udev, group);
2299 info(event->udev, "GROUP %u %s:%u\n",
2301 &rules->buf[rule->rule.filename_off],
2302 rule->rule.filename_line);
2307 char mode[UTIL_NAME_SIZE];
2310 if (event->mode_final)
2312 if (cur->key.op == OP_ASSIGN_FINAL)
2313 event->mode_final = 1;
2314 udev_event_apply_format(event, &rules->buf[cur->key.value_off], mode, sizeof(mode));
2315 event->mode = strtol(mode, &endptr, 8);
2316 if (endptr[0] != '\0') {
2317 err(event->udev, "invalide mode '%s' set default mode 0660\n", mode);
2320 info(event->udev, "MODE %#o %s:%u\n",
2322 &rules->buf[rule->rule.filename_off],
2323 rule->rule.filename_line);
2327 if (event->owner_final)
2329 if (cur->key.op == OP_ASSIGN_FINAL)
2330 event->owner_final = 1;
2331 event->uid = cur->key.uid;
2332 info(event->udev, "OWNER %u %s:%u\n",
2334 &rules->buf[rule->rule.filename_off],
2335 rule->rule.filename_line);
2338 if (event->group_final)
2340 if (cur->key.op == OP_ASSIGN_FINAL)
2341 event->group_final = 1;
2342 event->gid = cur->key.gid;
2343 info(event->udev, "GROUP %u %s:%u\n",
2345 &rules->buf[rule->rule.filename_off],
2346 rule->rule.filename_line);
2349 if (event->mode_final)
2351 if (cur->key.op == OP_ASSIGN_FINAL)
2352 event->mode_final = 1;
2353 event->mode = cur->key.mode;
2354 info(event->udev, "MODE %#o %s:%u\n",
2356 &rules->buf[rule->rule.filename_off],
2357 rule->rule.filename_line);
2361 const char *name = &rules->buf[cur->key.attr_off];
2362 char *value = &rules->buf[cur->key.value_off];
2364 if (value[0] != '\0') {
2365 char temp_value[UTIL_NAME_SIZE];
2366 struct udev_list_entry *entry;
2368 udev_event_apply_format(event, value, temp_value, sizeof(temp_value));
2369 entry = udev_device_add_property(event->dev, name, temp_value);
2370 /* store in db, skip private keys */
2372 udev_list_entry_set_flag(entry, 1);
2374 udev_device_add_property(event->dev, name, NULL);
2380 const char *name = &rules->buf[cur->key.value_off];
2381 char name_str[UTIL_PATH_SIZE];
2384 if (event->name_final)
2386 if (cur->key.op == OP_ASSIGN_FINAL)
2387 event->name_final = 1;
2388 udev_event_apply_format(event, name, name_str, sizeof(name_str));
2389 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2390 count = udev_util_replace_chars(name_str, "/");
2392 info(event->udev, "%i character(s) replaced\n", count);
2395 event->name = strdup(name_str);
2396 info(event->udev, "NAME '%s' %s:%u\n",
2398 &rules->buf[rule->rule.filename_off],
2399 rule->rule.filename_line);
2404 char temp[UTIL_PATH_SIZE];
2405 char filename[UTIL_PATH_SIZE];
2409 if (event->devlink_final)
2411 if (major(udev_device_get_devnum(event->dev)) == 0)
2413 if (cur->key.op == OP_ASSIGN_FINAL)
2414 event->devlink_final = 1;
2415 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2416 udev_device_cleanup_devlinks_list(event->dev);
2418 /* allow multiple symlinks separated by spaces */
2419 udev_event_apply_format(event, &rules->buf[cur->key.value_off], temp, sizeof(temp));
2420 if (esc == ESCAPE_UNSET)
2421 count = udev_util_replace_chars(temp, "/ ");
2422 else if (esc == ESCAPE_REPLACE)
2423 count = udev_util_replace_chars(temp, "/");
2425 info(event->udev, "%i character(s) replaced\n" , count);
2426 dbg(event->udev, "rule applied, added symlink(s) '%s'\n", temp);
2428 while (isspace(pos[0]))
2430 next = strchr(pos, ' ');
2431 while (next != NULL) {
2433 info(event->udev, "LINK '%s' %s:%u\n", pos,
2434 &rules->buf[rule->rule.filename_off], rule->rule.filename_line);
2435 util_strscpyl(filename, sizeof(filename), udev_get_dev_path(event->udev), "/", pos, NULL);
2436 udev_device_add_devlink(event->dev, filename, cur->key.devlink_unique);
2437 while (isspace(next[1]))
2440 next = strchr(pos, ' ');
2442 if (pos[0] != '\0') {
2443 info(event->udev, "LINK '%s' %s:%u\n", pos,
2444 &rules->buf[rule->rule.filename_off], rule->rule.filename_line);
2445 util_strscpyl(filename, sizeof(filename), udev_get_dev_path(event->udev), "/", pos, NULL);
2446 udev_device_add_devlink(event->dev, filename, cur->key.devlink_unique);
2450 case TK_A_EVENT_TIMEOUT:
2451 udev_device_set_event_timeout(event->dev, cur->key.event_timeout);
2453 case TK_A_IGNORE_REMOVE:
2454 udev_device_set_ignore_remove(event->dev, 1);
2458 const char *key_name = &rules->buf[cur->key.attr_off];
2459 char attr[UTIL_PATH_SIZE];
2460 char value[UTIL_NAME_SIZE];
2463 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0)
2464 util_strscpyl(attr, sizeof(attr), udev_device_get_syspath(event->dev), "/", key_name, NULL);
2465 attr_subst_subdir(attr, sizeof(attr));
2467 udev_event_apply_format(event, &rules->buf[cur->key.value_off], value, sizeof(value));
2468 info(event->udev, "ATTR '%s' writing '%s' %s:%u\n", attr, value,
2469 &rules->buf[rule->rule.filename_off],
2470 rule->rule.filename_line);
2471 f = fopen(attr, "w");
2473 if (fprintf(f, "%s", value) <= 0)
2474 err(event->udev, "error writing ATTR{%s}: %m\n", attr);
2477 err(event->udev, "error opening ATTR{%s} for writing: %m\n", attr);
2483 struct udev_list_entry *list_entry;
2485 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2486 udev_list_cleanup_entries(event->udev, &event->run_list);
2487 info(event->udev, "RUN '%s' %s:%u\n",
2488 &rules->buf[cur->key.value_off],
2489 &rules->buf[rule->rule.filename_off],
2490 rule->rule.filename_line);
2491 list_entry = udev_list_entry_add(event->udev, &event->run_list,
2492 &rules->buf[cur->key.value_off], NULL, 1, 0);
2493 if (cur->key.fail_on_error)
2494 udev_list_entry_set_flag(list_entry, 1);
2498 if (cur->key.rule_goto == 0)
2500 cur = &rules->tokens[cur->key.rule_goto];
2505 case TK_M_PARENTS_MIN:
2506 case TK_M_PARENTS_MAX:
2509 err(rules->udev, "wrong type %u\n", cur->type);
2516 /* fast-forward to next rule */
2517 cur = rule + rule->rule.token_count;
2518 dbg(rules->udev, "forward to rule: %u\n",
2519 (unsigned int) (cur - rules->tokens));