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 "?*" */
108 /* tokens of a rule are sorted/handled in this order */
113 TK_M_ACTION, /* val */
114 TK_M_DEVPATH, /* val */
115 TK_M_KERNEL, /* val */
116 TK_M_DEVLINK, /* val */
118 TK_M_ENV, /* val, attr */
119 TK_M_SUBSYSTEM, /* val */
120 TK_M_DRIVER, /* val */
121 TK_M_WAITFOR, /* val */
122 TK_M_ATTR, /* val, attr */
125 TK_M_KERNELS, /* val */
126 TK_M_SUBSYSTEMS, /* val */
127 TK_M_DRIVERS, /* val */
128 TK_M_ATTRS, /* val, attr */
131 TK_M_TEST, /* val, mode_t */
132 TK_M_PROGRAM, /* val */
133 TK_M_IMPORT_FILE, /* val */
134 TK_M_IMPORT_PROG, /* val */
135 TK_M_IMPORT_PARENT, /* val */
136 TK_M_RESULT, /* val */
140 TK_A_STRING_ESCAPE_NONE,
141 TK_A_STRING_ESCAPE_REPLACE,
142 TK_A_INOTIFY_WATCH, /* int */
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;
185 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",
234 return string_glob_strs[type];
237 static const char *token_str(enum token_type type)
239 static const char *token_strs[] = {
240 [TK_UNSET] = "UNSET",
243 [TK_M_ACTION] = "M ACTION",
244 [TK_M_DEVPATH] = "M DEVPATH",
245 [TK_M_KERNEL] = "M KERNEL",
246 [TK_M_DEVLINK] = "M DEVLINK",
247 [TK_M_NAME] = "M NAME",
248 [TK_M_ENV] = "M ENV",
249 [TK_M_SUBSYSTEM] = "M SUBSYSTEM",
250 [TK_M_DRIVER] = "M DRIVER",
251 [TK_M_WAITFOR] = "M WAITFOR",
252 [TK_M_ATTR] = "M ATTR",
254 [TK_M_PARENTS_MIN] = "M PARENTS_MIN",
255 [TK_M_KERNELS] = "M KERNELS",
256 [TK_M_SUBSYSTEMS] = "M SUBSYSTEMS",
257 [TK_M_DRIVERS] = "M DRIVERS",
258 [TK_M_ATTRS] = "M ATTRS",
259 [TK_M_PARENTS_MAX] = "M PARENTS_MAX",
261 [TK_M_TEST] = "M TEST",
262 [TK_M_PROGRAM] = "M PROGRAM",
263 [TK_M_IMPORT_FILE] = "M IMPORT_FILE",
264 [TK_M_IMPORT_PROG] = "M IMPORT_PROG",
265 [TK_M_IMPORT_PARENT] = "M MPORT_PARENT",
266 [TK_M_RESULT] = "M RESULT",
267 [TK_M_MAX] = "M MAX",
269 [TK_A_IGNORE_DEVICE] = "A IGNORE_DEVICE",
270 [TK_A_STRING_ESCAPE_NONE] = "A STRING_ESCAPE_NONE",
271 [TK_A_STRING_ESCAPE_REPLACE] = "A STRING_ESCAPE_REPLACE",
272 [TK_A_INOTIFY_WATCH] = "A INOTIFY_WATCH",
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_INOTIFY_WATCH:
364 dbg(rules->udev, "%s %u\n", token_str(type), token->key.watch);
366 case TK_A_NUM_FAKE_PART:
367 dbg(rules->udev, "%s %u\n", token_str(type), token->key.num_fake_part);
369 case TK_A_DEVLINK_PRIO:
370 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.devlink_prio);
373 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.uid);
376 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.gid);
379 dbg(rules->udev, "%s %s %#o\n", token_str(type), operation_str(op), token->key.mode);
381 case TK_A_EVENT_TIMEOUT:
382 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.event_timeout);
385 dbg(rules->udev, "%s '%s' %u\n", token_str(type), value, token->key.rule_goto);
388 dbg(rules->udev, "* %s\n", token_str(type));
390 case TK_M_PARENTS_MIN:
391 case TK_M_PARENTS_MAX:
394 dbg(rules->udev, "unknown type %u\n", type);
399 static void dump_rules(struct udev_rules *rules)
403 dbg(rules->udev, "dumping %u (%zu bytes) tokens, %u (%zu bytes) strings\n",
405 rules->token_cur * sizeof(struct token),
408 for(i = 0; i < rules->token_cur; i++)
409 dump_token(rules, &rules->tokens[i]);
412 static inline const char *operation_str(enum operation_type type) { return NULL; }
413 static inline const char *token_str(enum token_type type) { return NULL; }
414 static inline void dump_token(struct udev_rules *rules, struct token *token) {}
415 static inline void dump_rules(struct udev_rules *rules) {}
418 static int add_new_string(struct udev_rules *rules, const char *str, size_t bytes)
422 /* grow buffer if needed */
423 if (rules->buf_cur + bytes+1 >= rules->buf_max) {
427 /* double the buffer size */
428 add = rules->buf_max;
432 buf = realloc(rules->buf, rules->buf_max + add);
435 dbg(rules->udev, "extend buffer from %zu to %zu\n", rules->buf_max, rules->buf_max + add);
437 rules->buf_max += add;
439 off = rules->buf_cur;
440 memcpy(&rules->buf[rules->buf_cur], str, bytes);
441 rules->buf_cur += bytes;
446 static int add_string(struct udev_rules *rules, const char *str)
448 unsigned int node_idx;
449 struct trie_node *new_node;
450 unsigned int new_node_idx;
455 struct trie_node *parent;
457 /* walk trie, start from last character of str to find matching tails */
461 for (depth = 0; depth <= len; depth++) {
462 struct trie_node *node;
463 unsigned int child_idx;
465 node = &rules->trie_nodes[node_idx];
466 off = node->value_off + node->value_len - len;
468 /* match against current node */
469 if (depth == len || (node->value_len >= len && memcmp(&rules->buf[off], str, len) == 0))
472 /* lookup child node */
473 key = str[len - 1 - depth];
474 child_idx = node->child_idx;
475 while (child_idx > 0) {
476 struct trie_node *child;
478 child = &rules->trie_nodes[child_idx];
479 if (child->key == key)
481 child_idx = child->next_child_idx;
485 node_idx = child_idx;
488 /* string not found, add it */
489 off = add_new_string(rules, str, len + 1);
491 /* grow trie nodes if needed */
492 if (rules->trie_nodes_cur >= rules->trie_nodes_max) {
493 struct trie_node *nodes;
496 /* double the buffer size */
497 add = rules->trie_nodes_max;
501 nodes = realloc(rules->trie_nodes, (rules->trie_nodes_max + add) * sizeof(struct trie_node));
504 dbg(rules->udev, "extend trie nodes from %u to %u\n",
505 rules->trie_nodes_max, rules->trie_nodes_max + add);
506 rules->trie_nodes = nodes;
507 rules->trie_nodes_max += add;
511 new_node_idx = rules->trie_nodes_cur;
512 rules->trie_nodes_cur++;
513 new_node = &rules->trie_nodes[new_node_idx];
514 memset(new_node, 0x00, sizeof(struct trie_node));
515 new_node->value_off = off;
516 new_node->value_len = len;
519 /* join the parent's child list */
520 parent = &rules->trie_nodes[node_idx];
521 if (parent->child_idx == 0) {
522 parent->child_idx = new_node_idx;
524 struct trie_node *last_child;
526 last_child = &rules->trie_nodes[parent->last_child_idx];
527 last_child->next_child_idx = new_node_idx;
529 parent->last_child_idx = new_node_idx;
533 static int add_token(struct udev_rules *rules, struct token *token)
535 /* grow buffer if needed */
536 if (rules->token_cur+1 >= rules->token_max) {
537 struct token *tokens;
540 /* double the buffer size */
541 add = rules->token_max;
545 tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
548 dbg(rules->udev, "extend tokens from %u to %u\n", rules->token_max, rules->token_max + add);
549 rules->tokens = tokens;
550 rules->token_max += add;
552 memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
557 static uid_t add_uid(struct udev_rules *rules, const char *owner)
563 /* lookup, if we know it already */
564 for (i = 0; i < rules->uids_cur; i++) {
565 off = rules->uids[i].name_off;
566 if (strcmp(&rules->buf[off], owner) == 0) {
567 uid = rules->uids[i].uid;
568 dbg(rules->udev, "return existing %u for '%s'\n", uid, owner);
572 uid = util_lookup_user(rules->udev, owner);
574 /* grow buffer if needed */
575 if (rules->uids_cur+1 >= rules->uids_max) {
576 struct uid_gid *uids;
579 /* double the buffer size */
580 add = rules->uids_max;
584 uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
587 dbg(rules->udev, "extend uids from %u to %u\n", rules->uids_max, rules->uids_max + add);
589 rules->uids_max += add;
591 rules->uids[rules->uids_cur].uid = uid;
592 off = add_string(rules, owner);
595 rules->uids[rules->uids_cur].name_off = off;
600 static gid_t add_gid(struct udev_rules *rules, const char *group)
606 /* lookup, if we know it already */
607 for (i = 0; i < rules->gids_cur; i++) {
608 off = rules->gids[i].name_off;
609 if (strcmp(&rules->buf[off], group) == 0) {
610 gid = rules->gids[i].gid;
611 dbg(rules->udev, "return existing %u for '%s'\n", gid, group);
615 gid = util_lookup_group(rules->udev, group);
617 /* grow buffer if needed */
618 if (rules->gids_cur+1 >= rules->gids_max) {
619 struct uid_gid *gids;
622 /* double the buffer size */
623 add = rules->gids_max;
627 gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid));
630 dbg(rules->udev, "extend gids from %u to %u\n", rules->gids_max, rules->gids_max + add);
632 rules->gids_max += add;
634 rules->gids[rules->gids_cur].gid = gid;
635 off = add_string(rules, group);
638 rules->gids[rules->gids_cur].name_off = off;
643 static int import_property_from_string(struct udev_device *dev, char *line)
645 struct udev *udev = udev_device_get_udev(dev);
652 while (isspace(key[0]))
655 /* comment or empty line */
656 if (key[0] == '#' || key[0] == '\0')
659 /* split key/value */
660 val = strchr(key, '=');
667 while (isspace(val[0]))
674 while (isspace(key[len-1]))
678 /* terminate value */
682 while (isspace(val[len-1]))
690 if (val[0] == '"' || val[0] == '\'') {
691 if (val[len-1] != val[0]) {
692 info(udev, "inconsistent quoting: '%s', skip\n", line);
699 dbg(udev, "adding '%s'='%s'\n", key, val);
701 /* handle device, renamed by external tool, returning new path */
702 if (strcmp(key, "DEVPATH") == 0) {
703 char syspath[UTIL_PATH_SIZE];
705 info(udev, "updating devpath from '%s' to '%s'\n",
706 udev_device_get_devpath(dev), val);
707 util_strscpyl(syspath, sizeof(syspath), udev_get_sys_path(udev), val, NULL);
708 udev_device_set_syspath(dev, syspath);
710 struct udev_list_entry *entry;
712 entry = udev_device_add_property(dev, key, val);
714 udev_list_entry_set_flag(entry, 1);
719 static int import_file_into_properties(struct udev_device *dev, const char *filename)
722 char line[UTIL_LINE_SIZE];
724 f = fopen(filename, "r");
727 while (fgets(line, sizeof(line), f) != NULL)
728 import_property_from_string(dev, line);
733 static int import_program_into_properties(struct udev_device *dev, const char *program)
735 struct udev *udev = udev_device_get_udev(dev);
741 envp = udev_device_get_properties_envp(dev);
742 if (util_run_program(udev, program, envp, result, sizeof(result), &reslen) != 0)
746 while (line != NULL) {
749 pos = strchr(line, '\n');
754 import_property_from_string(dev, line);
760 static int import_parent_into_properties(struct udev_device *dev, const char *filter)
762 struct udev *udev = udev_device_get_udev(dev);
763 struct udev_device *dev_parent;
764 struct udev_list_entry *list_entry;
766 dev_parent = udev_device_get_parent(dev);
767 if (dev_parent == NULL)
770 dbg(udev, "found parent '%s', get the node name\n", udev_device_get_syspath(dev_parent));
771 udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
772 const char *key = udev_list_entry_get_name(list_entry);
773 const char *val = udev_list_entry_get_value(list_entry);
775 if (fnmatch(filter, key, 0) == 0) {
776 struct udev_list_entry *entry;
778 dbg(udev, "import key '%s=%s'\n", key, val);
779 entry = udev_device_add_property(dev, key, val);
781 udev_list_entry_set_flag(entry, 1);
787 #define WAIT_LOOP_PER_SECOND 50
788 static int wait_for_file(struct udev_device *dev, const char *file, int timeout)
790 struct udev *udev = udev_device_get_udev(dev);
791 char filepath[UTIL_PATH_SIZE];
792 char devicepath[UTIL_PATH_SIZE];
794 int loop = timeout * WAIT_LOOP_PER_SECOND;
796 /* a relative path is a device attribute */
797 devicepath[0] = '\0';
798 if (file[0] != '/') {
799 util_strscpyl(devicepath, sizeof(devicepath),
800 udev_get_sys_path(udev), udev_device_get_devpath(dev), NULL);
801 util_strscpyl(filepath, sizeof(filepath), devicepath, "/", file, NULL);
805 dbg(udev, "will wait %i sec for '%s'\n", timeout, file);
808 if (stat(file, &stats) == 0) {
809 info(udev, "file '%s' appeared after %i loops\n", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
812 /* make sure, the device did not disappear in the meantime */
813 if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
814 info(udev, "device disappeared while waiting for '%s'\n", file);
817 info(udev, "wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND);
818 usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND);
820 info(udev, "waiting for '%s' failed\n", file);
824 static int attr_subst_subdir(char *attr, size_t len)
828 if (strstr(attr, "/*/")) {
830 char dirname[UTIL_PATH_SIZE];
834 util_strscpy(dirname, sizeof(dirname), attr);
835 pos = strstr(dirname, "/*/");
840 dir = opendir(dirname);
844 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
847 if (dent->d_name[0] == '.')
849 util_strscpyl(attr, len, dirname, "/", dent->d_name, tail, NULL);
850 if (stat(attr, &stats) == 0) {
862 static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value)
868 if (linepos == NULL && linepos[0] == '\0')
871 /* skip whitespace */
872 while (isspace(linepos[0]) || linepos[0] == ',')
876 if (linepos[0] == '\0')
882 if (linepos[0] == '\0')
884 if (isspace(linepos[0]))
886 if (linepos[0] == '=')
888 if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
889 if (linepos[1] == '=')
893 /* remember end of key */
896 /* skip whitespace after key */
897 while (isspace(linepos[0]))
899 if (linepos[0] == '\0')
902 /* get operation type */
903 if (linepos[0] == '=' && linepos[1] == '=') {
906 } else if (linepos[0] == '!' && linepos[1] == '=') {
909 } else if (linepos[0] == '+' && linepos[1] == '=') {
912 } else if (linepos[0] == '=') {
915 } else if (linepos[0] == ':' && linepos[1] == '=') {
916 *op = OP_ASSIGN_FINAL;
924 /* skip whitespace after operator */
925 while (isspace(linepos[0]))
927 if (linepos[0] == '\0')
931 if (linepos[0] == '"')
938 temp = strchr(linepos, '"');
943 dbg(udev, "%s '%s'-'%s'\n", operation_str(*op), *key, *value);
945 /* move line to next key */
950 /* extract possible KEY{attr} */
951 static char *get_key_attribute(struct udev *udev, char *str)
956 attr = strchr(str, '{');
959 pos = strchr(attr, '}');
961 err(udev, "missing closing brace for format\n");
965 dbg(udev, "attribute='%s'\n", attr);
971 static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
972 enum operation_type op,
973 const char *value, const void *data)
975 struct token *token = &rule_tmp->token[rule_tmp->token_cur];
976 const char *attr = data;
977 enum string_glob_type glob;
979 memset(token, 0x00, sizeof(struct token));
991 case TK_M_SUBSYSTEMS:
994 case TK_M_IMPORT_FILE:
995 case TK_M_IMPORT_PROG:
996 case TK_M_IMPORT_PARENT:
1004 token->key.value_off = add_string(rule_tmp->rules, value);
1011 token->key.value_off = add_string(rule_tmp->rules, value);
1012 token->key.attr_off = add_string(rule_tmp->rules, attr);
1015 token->key.value_off = add_string(rule_tmp->rules, value);
1017 token->key.mode = *(mode_t *)data;
1019 case TK_A_IGNORE_DEVICE:
1020 case TK_A_STRING_ESCAPE_NONE:
1021 case TK_A_STRING_ESCAPE_REPLACE:
1022 case TK_A_IGNORE_REMOVE:
1023 case TK_A_LAST_RULE:
1026 token->key.value_off = add_string(rule_tmp->rules, value);
1027 token->key.ignore_error = *(int *)data;
1029 case TK_A_INOTIFY_WATCH:
1030 case TK_A_NUM_FAKE_PART:
1031 case TK_A_DEVLINK_PRIO:
1032 token->key.devlink_prio = *(int *)data;
1035 token->key.uid = *(uid_t *)data;
1038 token->key.gid = *(gid_t *)data;
1041 token->key.mode = *(mode_t *)data;
1043 case TK_A_EVENT_TIMEOUT:
1044 token->key.event_timeout = *(int *)data;
1047 case TK_M_PARENTS_MIN:
1048 case TK_M_PARENTS_MAX:
1052 err(rule_tmp->rules->udev, "wrong type %u\n", type);
1057 if (value != NULL && type < TK_M_MAX) {
1058 /* check if we need to split or call fnmatch() while matching rules */
1062 has_split = (strchr(value, '|') != NULL);
1063 has_glob = (strchr(value, '*') != NULL || strchr(value, '?') != NULL ||
1064 strchr(value, '[') != NULL || strchr(value, ']') != NULL);
1065 if (has_split && has_glob) {
1066 glob = GL_SPLIT_GLOB;
1067 } else if (has_split) {
1069 } else if (has_glob) {
1070 if (strcmp(value, "?*") == 0)
1071 glob = GL_SOMETHING;
1077 token->key.type = type;
1079 token->key.glob = glob;
1080 rule_tmp->token_cur++;
1081 if (rule_tmp->token_cur >= ARRAY_SIZE(rule_tmp->token)) {
1082 err(rule_tmp->rules->udev, "temporary rule array too small\n");
1088 static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp)
1091 unsigned int start = 0;
1092 unsigned int end = rule_tmp->token_cur;
1094 for (i = 0; i < rule_tmp->token_cur; i++) {
1095 enum token_type next_val = TK_UNSET;
1096 unsigned int next_idx;
1099 /* find smallest value */
1100 for (j = start; j < end; j++) {
1101 if (rule_tmp->token[j].type == TK_UNSET)
1103 if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
1104 next_val = rule_tmp->token[j].type;
1109 /* add token and mark done */
1110 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
1112 rule_tmp->token[next_idx].type = TK_UNSET;
1115 if (next_idx == start)
1117 if (next_idx+1 == end)
1123 static int add_rule(struct udev_rules *rules, char *line,
1124 const char *filename, unsigned int filename_off, unsigned int lineno)
1128 struct rule_tmp rule_tmp;
1130 memset(&rule_tmp, 0x00, sizeof(struct rule_tmp));
1131 rule_tmp.rules = rules;
1132 rule_tmp.rule.type = TK_RULE;
1133 rule_tmp.rule.rule.filename_off = filename_off;
1134 rule_tmp.rule.rule.filename_line = lineno;
1140 enum operation_type op;
1142 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0)
1145 if (strcmp(key, "ACTION") == 0) {
1146 if (op > OP_MATCH_MAX) {
1147 err(rules->udev, "invalid ACTION operation\n");
1150 rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL);
1154 if (strcmp(key, "DEVPATH") == 0) {
1155 if (op > OP_MATCH_MAX) {
1156 err(rules->udev, "invalid DEVPATH operation\n");
1159 rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
1163 if (strcmp(key, "KERNEL") == 0) {
1164 if (op > OP_MATCH_MAX) {
1165 err(rules->udev, "invalid KERNEL operation\n");
1168 rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL);
1172 if (strcmp(key, "SUBSYSTEM") == 0) {
1173 if (op > OP_MATCH_MAX) {
1174 err(rules->udev, "invalid SUBSYSTEM operation\n");
1177 /* bus, class, subsystem events should all be the same */
1178 if (strcmp(value, "subsystem") == 0 ||
1179 strcmp(value, "bus") == 0 ||
1180 strcmp(value, "class") == 0) {
1181 if (strcmp(value, "bus") == 0 || strcmp(value, "class") == 0)
1182 err(rules->udev, "'%s' must be specified as 'subsystem' \n"
1183 "please fix it in %s:%u", value, filename, lineno);
1184 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
1186 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
1190 if (strcmp(key, "DRIVER") == 0) {
1191 if (op > OP_MATCH_MAX) {
1192 err(rules->udev, "invalid DRIVER operation\n");
1195 rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL);
1199 if (strncmp(key, "ATTR{", sizeof("ATTR{")-1) == 0) {
1200 attr = get_key_attribute(rules->udev, key + sizeof("ATTR")-1);
1202 err(rules->udev, "error parsing ATTR attribute\n");
1205 if (op < OP_MATCH_MAX) {
1206 rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
1208 rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr);
1213 if (strcmp(key, "KERNELS") == 0 ||
1214 strcmp(key, "ID") == 0) {
1215 if (op > OP_MATCH_MAX) {
1216 err(rules->udev, "invalid KERNELS operation\n");
1219 rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1223 if (strcmp(key, "SUBSYSTEMS") == 0 ||
1224 strcmp(key, "BUS") == 0) {
1225 if (op > OP_MATCH_MAX) {
1226 err(rules->udev, "invalid SUBSYSTEMS operation\n");
1229 rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1233 if (strcmp(key, "DRIVERS") == 0) {
1234 if (op > OP_MATCH_MAX) {
1235 err(rules->udev, "invalid DRIVERS operation\n");
1238 rule_add_key(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
1242 if (strncmp(key, "ATTRS{", sizeof("ATTRS{")-1) == 0 ||
1243 strncmp(key, "SYSFS{", sizeof("SYSFS{")-1) == 0) {
1244 if (op > OP_MATCH_MAX) {
1245 err(rules->udev, "invalid ATTRS operation\n");
1248 attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
1250 err(rules->udev, "error parsing ATTRS attribute\n");
1253 if (strncmp(attr, "device/", 7) == 0)
1254 err(rules->udev, "the 'device' link may not be available in a future kernel, "
1255 "please fix it in %s:%u", filename, lineno);
1256 else if (strstr(attr, "../") != NULL)
1257 err(rules->udev, "do not reference parent sysfs directories directly, "
1258 "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
1259 rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1263 if (strncmp(key, "ENV{", sizeof("ENV{")-1) == 0) {
1264 attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1);
1266 err(rules->udev, "error parsing ENV attribute\n");
1269 if (op < OP_MATCH_MAX) {
1270 if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
1273 if (rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
1279 if (strcmp(key, "PROGRAM") == 0) {
1280 rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
1284 if (strcmp(key, "RESULT") == 0) {
1285 if (op > OP_MATCH_MAX) {
1286 err(rules->udev, "invalid RESULT operation\n");
1289 rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL);
1293 if (strncmp(key, "IMPORT", sizeof("IMPORT")-1) == 0) {
1294 attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1);
1295 if (attr != NULL && strstr(attr, "program")) {
1296 dbg(rules->udev, "IMPORT will be executed\n");
1297 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1298 } else if (attr != NULL && strstr(attr, "file")) {
1299 dbg(rules->udev, "IMPORT will be included as file\n");
1300 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1301 } else if (attr != NULL && strstr(attr, "parent")) {
1302 dbg(rules->udev, "IMPORT will include the parent values\n");
1303 rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
1305 /* figure it out if it is executable */
1306 char file[UTIL_PATH_SIZE];
1308 struct stat statbuf;
1310 /* allow programs in /lib/udev called without the path */
1311 if (value[0] != '/')
1312 util_strscpyl(file, sizeof(file), UDEV_PREFIX "/lib/udev/", value, NULL);
1314 util_strscpy(file, sizeof(file), value);
1315 pos = strchr(file, ' ');
1318 dbg(rules->udev, "IMPORT auto mode for '%s'\n", file);
1319 if (stat(file, &statbuf) == 0 && (statbuf.st_mode & S_IXUSR)) {
1320 dbg(rules->udev, "IMPORT will be executed (autotype)\n");
1321 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1323 dbg(rules->udev, "IMPORT will be included as file (autotype)\n");
1324 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1330 if (strncmp(key, "TEST", sizeof("TEST")-1) == 0) {
1333 if (op > OP_MATCH_MAX) {
1334 err(rules->udev, "invalid TEST operation\n");
1337 attr = get_key_attribute(rules->udev, key + sizeof("TEST")-1);
1339 mode = strtol(attr, NULL, 8);
1340 rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode);
1342 rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL);
1347 if (strncmp(key, "RUN", sizeof("RUN")-1) == 0) {
1350 attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1);
1351 if (attr != NULL && strstr(attr, "ignore_error"))
1353 rule_add_key(&rule_tmp, TK_A_RUN, op, value, &flag);
1357 if (strcmp(key, "WAIT_FOR") == 0 || strcmp(key, "WAIT_FOR_SYSFS") == 0) {
1358 rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1362 if (strcmp(key, "LABEL") == 0) {
1363 rule_tmp.rule.rule.label_off = add_string(rules, value);
1367 if (strcmp(key, "GOTO") == 0) {
1368 rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1372 if (strncmp(key, "NAME", sizeof("NAME")-1) == 0) {
1373 if (op < OP_MATCH_MAX) {
1374 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
1376 if (value[0] == '\0')
1377 info(rules->udev, "name empty, node creation suppressed\n");
1378 rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL);
1379 attr = get_key_attribute(rules->udev, key + sizeof("NAME")-1);
1381 if (strstr(attr, "all_partitions") != NULL) {
1382 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1384 dbg(rules->udev, "creation of partition nodes requested\n");
1385 rule_add_key(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1387 if (strstr(attr, "ignore_remove") != NULL) {
1388 dbg(rules->udev, "remove event should be ignored\n");
1389 rule_add_key(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1393 rule_tmp.rule.rule.flags = 1;
1397 if (strcmp(key, "SYMLINK") == 0) {
1398 if (op < OP_MATCH_MAX)
1399 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
1401 rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, NULL);
1402 rule_tmp.rule.rule.flags = 1;
1406 if (strcmp(key, "OWNER") == 0) {
1410 uid = strtoul(value, &endptr, 10);
1411 if (endptr[0] == '\0') {
1412 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1413 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1414 uid = add_uid(rules, value);
1415 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1416 } else if (rules->resolve_names >= 0) {
1417 rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
1419 rule_tmp.rule.rule.flags = 1;
1423 if (strcmp(key, "GROUP") == 0) {
1427 gid = strtoul(value, &endptr, 10);
1428 if (endptr[0] == '\0') {
1429 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1430 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1431 gid = add_gid(rules, value);
1432 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1433 } else if (rules->resolve_names >= 0) {
1434 rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
1436 rule_tmp.rule.rule.flags = 1;
1440 if (strcmp(key, "MODE") == 0) {
1444 mode = strtol(value, &endptr, 8);
1445 if (endptr[0] == '\0')
1446 rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1448 rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
1449 rule_tmp.rule.rule.flags = 1;
1453 if (strcmp(key, "OPTIONS") == 0) {
1456 if (strstr(value, "last_rule") != NULL) {
1457 dbg(rules->udev, "last rule to be applied\n");
1458 rule_add_key(&rule_tmp, TK_A_LAST_RULE, 0, NULL, NULL);
1460 if (strstr(value, "ignore_device") != NULL) {
1461 dbg(rules->udev, "device should be ignored\n");
1462 rule_add_key(&rule_tmp, TK_A_IGNORE_DEVICE, 0, NULL, NULL);
1464 if (strstr(value, "ignore_remove") != NULL) {
1465 dbg(rules->udev, "remove event should be ignored\n");
1466 rule_add_key(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1468 pos = strstr(value, "link_priority=");
1470 int prio = atoi(&pos[strlen("link_priority=")]);
1472 rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, 0, NULL, &prio);
1473 dbg(rules->udev, "link priority=%i\n", prio);
1475 pos = strstr(value, "event_timeout=");
1477 int tout = atoi(&pos[strlen("event_timeout=")]);
1479 rule_add_key(&rule_tmp, TK_A_EVENT_TIMEOUT, 0, NULL, &tout);
1480 dbg(rules->udev, "event timout=%i\n", tout);
1482 pos = strstr(value, "string_escape=");
1484 pos = &pos[strlen("string_escape=")];
1485 if (strncmp(pos, "none", strlen("none")) == 0)
1486 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, 0, NULL, NULL);
1487 else if (strncmp(pos, "replace", strlen("replace")) == 0)
1488 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, 0, NULL, NULL);
1490 if (strstr(value, "all_partitions") != NULL) {
1491 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1493 rule_add_key(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1494 dbg(rules->udev, "creation of partition nodes requested\n");
1496 pos = strstr(value, "nowatch");
1500 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, 0, NULL, &off);
1501 dbg(rules->udev, "inotify watch of device disabled\n");
1503 pos = strstr(value, "watch");
1507 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, 0, NULL, &on);
1508 dbg(rules->udev, "inotify watch of device requested\n");
1513 err(rules->udev, "unknown key '%s' in %s:%u\n", key, filename, lineno);
1516 /* add rule token */
1517 rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur;
1518 if (add_token(rules, &rule_tmp.rule) != 0)
1521 /* add tokens to list, sorted by type */
1522 if (sort_token(rules, &rule_tmp) != 0)
1527 err(rules->udev, "invalid rule '%s:%u'\n", filename, lineno);
1531 static int parse_file(struct udev_rules *rules, const char *filename, unsigned short filename_off)
1534 unsigned int first_token;
1535 char line[UTIL_LINE_SIZE];
1539 info(rules->udev, "reading '%s' as rules file\n", filename);
1541 f = fopen(filename, "r");
1545 first_token = rules->token_cur;
1547 while(fgets(line, sizeof(line), f) != NULL) {
1551 /* skip whitespace */
1554 while (isspace(key[0]))
1565 /* continue reading if backslash+newline is found */
1566 while (line[len-2] == '\\') {
1567 if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1573 if (len+1 >= sizeof(line)) {
1574 err(rules->udev, "line too long '%s':%u, ignored\n", filename, line_nr);
1577 add_rule(rules, key, filename, filename_off, line_nr);
1581 /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1582 for (i = first_token+1; i < rules->token_cur; i++) {
1583 if (rules->tokens[i].type == TK_A_GOTO) {
1584 char *label = &rules->buf[rules->tokens[i].key.value_off];
1587 for (j = i+1; j < rules->token_cur; j++) {
1588 if (rules->tokens[j].type != TK_RULE)
1590 if (rules->tokens[j].rule.label_off == 0)
1592 if (strcmp(label, &rules->buf[rules->tokens[j].rule.label_off]) != 0)
1594 rules->tokens[i].key.rule_goto = j;
1597 if (rules->tokens[i].key.rule_goto == 0)
1598 err(rules->udev, "GOTO '%s' has no matching label in: '%s'\n", label, filename);
1604 static int add_matching_files(struct udev *udev, struct udev_list_node *file_list, const char *dirname, const char *suffix)
1607 char filename[UTIL_PATH_SIZE];
1609 dbg(udev, "open directory '%s'\n", dirname);
1610 dir = opendir(dirname);
1612 info(udev, "unable to open '%s': %m\n", dirname);
1617 struct dirent *dent;
1619 dent = readdir(dir);
1620 if (dent == NULL || dent->d_name[0] == '\0')
1623 if (dent->d_name[0] == '.')
1626 /* look for file matching with specified suffix */
1627 if (suffix != NULL) {
1630 ext = strrchr(dent->d_name, '.');
1633 if (strcmp(ext, suffix) != 0)
1636 util_strscpyl(filename, sizeof(filename), dirname, "/", dent->d_name, NULL);
1637 dbg(udev, "put file '%s' into list\n", filename);
1638 udev_list_entry_add(udev, file_list, filename, NULL, 1, 1);
1645 struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
1647 struct udev_rules *rules;
1648 struct stat statbuf;
1649 struct udev_list_node file_list;
1650 struct udev_list_entry *file_loop, *file_tmp;
1651 struct token end_token;
1653 rules = malloc(sizeof(struct udev_rules));
1656 memset(rules, 0x00, sizeof(struct udev_rules));
1658 rules->resolve_names = resolve_names;
1659 udev_list_init(&file_list);
1661 /* init token array and string buffer */
1662 rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
1663 if (rules->tokens == NULL)
1665 rules->token_max = PREALLOC_TOKEN;
1667 rules->buf = malloc(PREALLOC_STRBUF);
1668 if (rules->buf == NULL)
1670 rules->buf_max = PREALLOC_STRBUF;
1671 /* offset 0 is always '\0' */
1672 rules->buf[0] = '\0';
1674 dbg(udev, "prealloc %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1675 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1677 rules->trie_nodes = malloc(PREALLOC_TRIE * sizeof(struct trie_node));
1678 if (rules->trie_nodes == NULL)
1680 rules->trie_nodes_max = PREALLOC_TRIE;
1681 /* offset 0 is the trie root, with an empty string */
1682 memset(rules->trie_nodes, 0x00, sizeof(struct trie_node));
1683 rules->trie_nodes_cur = 1;
1685 if (udev_get_rules_path(udev) != NULL) {
1686 /* custom rules location for testing */
1687 add_matching_files(udev, &file_list, udev_get_rules_path(udev), ".rules");
1689 char filename[PATH_MAX];
1690 struct udev_list_node sort_list;
1691 struct udev_list_entry *sort_loop, *sort_tmp;
1693 /* read user/custom rules */
1694 add_matching_files(udev, &file_list, SYSCONFDIR "/udev/rules.d", ".rules");
1696 /* read dynamic/temporary rules */
1697 util_strscpyl(filename, sizeof(filename), udev_get_dev_path(udev), "/.udev/rules.d", NULL);
1698 if (stat(filename, &statbuf) != 0) {
1699 util_create_path(udev, filename);
1700 udev_selinux_setfscreatecon(udev, filename, S_IFDIR|0755);
1701 mkdir(filename, 0755);
1702 udev_selinux_resetfscreatecon(udev);
1704 udev_list_init(&sort_list);
1705 add_matching_files(udev, &sort_list, filename, ".rules");
1707 /* read default rules */
1708 add_matching_files(udev, &sort_list, UDEV_PREFIX "/lib/udev/rules.d", ".rules");
1710 /* sort all rules files by basename into list of files */
1711 udev_list_entry_foreach_safe(sort_loop, sort_tmp, udev_list_get_entry(&sort_list)) {
1712 const char *sort_name = udev_list_entry_get_name(sort_loop);
1713 const char *sort_base = strrchr(sort_name, '/');
1715 if (sort_base == NULL)
1717 /* sort entry into existing list */
1718 udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1719 const char *file_name = udev_list_entry_get_name(file_loop);
1720 const char *file_base = strrchr(file_name, '/');
1722 if (file_base == NULL)
1724 if (strcmp(file_base, sort_base) == 0) {
1725 info(udev, "rule file basename '%s' already added, ignoring '%s'\n",
1726 file_name, sort_name);
1727 udev_list_entry_delete(sort_loop);
1731 if (strcmp(file_base, sort_base) > 0) {
1732 /* found later file, insert before */
1733 udev_list_entry_remove(sort_loop);
1734 udev_list_entry_insert_before(sort_loop, file_loop);
1739 /* current file already handled */
1740 if (sort_loop == NULL)
1742 /* no later file, append to end of list */
1743 udev_list_entry_remove(sort_loop);
1744 udev_list_entry_append(sort_loop, &file_list);
1748 /* add all filenames to the string buffer */
1749 udev_list_entry_foreach(file_loop, udev_list_get_entry(&file_list)) {
1750 const char *filename = udev_list_entry_get_name(file_loop);
1751 unsigned int filename_off;
1753 filename_off = add_string(rules, filename);
1754 /* the offset in the rule is limited to unsigned short */
1755 if (filename_off < USHRT_MAX)
1756 udev_list_entry_set_flag(file_loop, filename_off);
1759 /* parse list of files */
1760 udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1761 const char *filename = udev_list_entry_get_name(file_loop);
1762 unsigned int filename_off = udev_list_entry_get_flag(file_loop);
1764 if (stat(filename, &statbuf) == 0 && statbuf.st_size > 0)
1765 parse_file(rules, filename, filename_off);
1767 info(udev, "can not read '%s'\n", filename);
1768 udev_list_entry_delete(file_loop);
1771 memset(&end_token, 0x00, sizeof(struct token));
1772 end_token.type = TK_END;
1773 add_token(rules, &end_token);
1775 /* shrink allocated token and string buffer */
1776 if (rules->token_cur < rules->token_max) {
1777 struct token *tokens;
1779 tokens = realloc(rules->tokens, rules->token_cur * sizeof(struct token));
1780 if (tokens != NULL || rules->token_cur == 0) {
1781 rules->tokens = tokens;
1782 rules->token_max = rules->token_cur;
1785 if (rules->buf_cur < rules->buf_max) {
1788 buf = realloc(rules->buf, rules->buf_cur);
1789 if (buf != NULL || rules->buf_cur == 0) {
1791 rules->buf_max = rules->buf_cur;
1794 info(udev, "rules use %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1795 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1796 info(udev, "temporary index used %zu bytes (%u * %zu bytes)\n",
1797 rules->trie_nodes_cur * sizeof(struct trie_node),
1798 rules->trie_nodes_cur, sizeof(struct trie_node));
1801 free(rules->trie_nodes);
1802 rules->trie_nodes = NULL;
1803 rules->trie_nodes_cur = 0;
1804 rules->trie_nodes_max = 0;
1806 /* cleanup uid/gid cache */
1809 rules->uids_cur = 0;
1810 rules->uids_max = 0;
1813 rules->gids_cur = 0;
1814 rules->gids_max = 0;
1820 void udev_rules_unref(struct udev_rules *rules)
1824 free(rules->tokens);
1826 free(rules->trie_nodes);
1832 static int match_key(struct udev_rules *rules, struct token *token, const char *val)
1834 char *key_value = &rules->buf[token->key.value_off];
1841 switch (token->key.glob) {
1843 match = (strcmp(key_value, val) == 0);
1846 match = (fnmatch(key_value, val, 0) == 0);
1853 split = &rules->buf[token->key.value_off];
1858 next = strchr(split, '|');
1860 size_t matchlen = (size_t)(next - split);
1862 match = (matchlen == len && strncmp(split, val, matchlen) == 0);
1866 match = (strcmp(split, val) == 0);
1875 char value[UTIL_PATH_SIZE];
1877 util_strscpy(value, sizeof(value), &rules->buf[token->key.value_off]);
1879 while (key_value != NULL) {
1880 pos = strchr(key_value, '|');
1885 dbg(rules->udev, "match %s '%s' <-> '%s'\n", token_str(token->type), key_value, val);
1886 match = (fnmatch(key_value, val, 0) == 0);
1894 match = (val[0] != '\0');
1900 if (match && (token->key.op == OP_MATCH)) {
1901 dbg(rules->udev, "%s is true (matching value)\n", token_str(token->type));
1904 if (!match && (token->key.op == OP_NOMATCH)) {
1905 dbg(rules->udev, "%s is true (non-matching value)\n", token_str(token->type));
1908 dbg(rules->udev, "%s is not true\n", token_str(token->type));
1912 static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur)
1914 const char *key_name = &rules->buf[cur->key.attr_off];
1915 const char *key_value = &rules->buf[cur->key.value_off];
1916 char value[UTIL_NAME_SIZE];
1920 if (key_name[0] == '[') {
1921 char attr[UTIL_PATH_SIZE];
1923 util_strscpy(attr, sizeof(attr), key_name);
1924 util_resolve_subsys_kernel(event->udev, attr, value, sizeof(value), 1);
1926 if (value[0] == '\0') {
1929 val = udev_device_get_sysattr_value(dev, key_name);
1932 util_strscpy(value, sizeof(value), val);
1935 /* strip trailing whitespace of value, if not asked to match for it */
1936 len = strlen(key_value);
1937 if (len > 0 && !isspace(key_value[len-1])) {
1938 len = strlen(value);
1939 while (len > 0 && isspace(value[--len]))
1941 dbg(rules->udev, "removed trailing whitespace from '%s'\n", value);
1943 return match_key(rules, cur, value);
1952 int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event)
1956 enum escape_type esc = ESCAPE_UNSET;
1959 if (rules->tokens == NULL)
1962 can_set_name = ((strcmp(udev_device_get_action(event->dev), "add") == 0 ||
1963 strcmp(udev_device_get_action(event->dev), "change") == 0) &&
1964 (major(udev_device_get_devnum(event->dev)) > 0 ||
1965 strcmp(udev_device_get_subsystem(event->dev), "net") == 0));
1967 /* loop through token list, match, run actions or forward to next rule */
1968 cur = &rules->tokens[0];
1971 dump_token(rules, cur);
1972 switch (cur->type) {
1976 /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
1977 if (!can_set_name && rule->rule.flags)
1982 if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
1986 if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
1990 if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
1995 size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
1996 struct udev_list_entry *list_entry;
1999 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
2000 const char *devlink;
2002 devlink = &udev_list_entry_get_name(list_entry)[devlen];
2003 if (match_key(rules, cur, devlink) == 0) {
2013 if (match_key(rules, cur, event->name) != 0)
2018 const char *key_name = &rules->buf[cur->key.attr_off];
2021 value = udev_device_get_property_value(event->dev, key_name);
2022 if (value == NULL) {
2023 dbg(event->udev, "ENV{%s} is not set, treat as empty\n", key_name);
2026 if (match_key(rules, cur, value))
2030 case TK_M_SUBSYSTEM:
2031 if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
2035 if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
2040 char filename[UTIL_PATH_SIZE];
2043 udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename));
2044 found = (wait_for_file(event->dev, filename, 10) == 0);
2045 if (!found && (cur->key.op != OP_NOMATCH))
2050 if (match_attr(rules, event->dev, event, cur) != 0)
2054 case TK_M_SUBSYSTEMS:
2060 /* get whole sequence of parent matches */
2062 while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX)
2065 /* loop over parents */
2066 event->dev_parent = event->dev;
2070 dbg(event->udev, "parent: '%s'\n", udev_device_get_syspath(event->dev_parent));
2071 /* loop over sequence of parent match keys */
2072 for (key = cur; key < next; key++ ) {
2073 dump_token(rules, key);
2076 if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
2079 case TK_M_SUBSYSTEMS:
2080 if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
2084 if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
2088 if (match_attr(rules, event->dev_parent, event, key) != 0)
2094 dbg(event->udev, "parent key matched\n");
2096 dbg(event->udev, "all parent keys matched\n");
2097 /* all keys matched */
2101 event->dev_parent = udev_device_get_parent(event->dev_parent);
2102 if (event->dev_parent == NULL)
2105 /* move behind our sequence of parent match keys */
2111 char filename[UTIL_PATH_SIZE];
2112 struct stat statbuf;
2115 udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename));
2116 if (util_resolve_subsys_kernel(event->udev, filename, filename, sizeof(filename), 0) != 0) {
2117 if (filename[0] != '/') {
2118 char tmp[UTIL_PATH_SIZE];
2120 util_strscpy(tmp, sizeof(tmp), filename);
2121 util_strscpyl(filename, sizeof(filename),
2122 udev_device_get_syspath(event->dev), "/", tmp, NULL);
2125 attr_subst_subdir(filename, sizeof(filename));
2127 match = (stat(filename, &statbuf) == 0);
2128 dbg(event->udev, "'%s' %s", filename, match ? "exists\n" : "does not exist\n");
2129 if (match && cur->key.mode > 0) {
2130 match = ((statbuf.st_mode & cur->key.mode) > 0);
2131 dbg(event->udev, "'%s' has mode=%#o and %s %#o\n", filename, statbuf.st_mode,
2132 match ? "matches" : "does not match", cur->key.mode);
2134 if (match && cur->key.op == OP_NOMATCH)
2136 if (!match && cur->key.op == OP_MATCH)
2142 char program[UTIL_PATH_SIZE];
2144 char result[UTIL_PATH_SIZE];
2146 free(event->program_result);
2147 event->program_result = NULL;
2148 udev_event_apply_format(event, &rules->buf[cur->key.value_off], program, sizeof(program));
2149 envp = udev_device_get_properties_envp(event->dev);
2150 info(event->udev, "PROGRAM '%s' %s:%u\n",
2152 &rules->buf[rule->rule.filename_off],
2153 rule->rule.filename_line);
2154 if (util_run_program(event->udev, program, envp, result, sizeof(result), NULL) != 0) {
2155 if (cur->key.op != OP_NOMATCH)
2160 util_remove_trailing_chars(result, '\n');
2161 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2162 count = udev_util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
2164 info(event->udev, "%i character(s) replaced\n" , count);
2166 event->program_result = strdup(result);
2167 dbg(event->udev, "storing result '%s'\n", event->program_result);
2168 if (cur->key.op == OP_NOMATCH)
2173 case TK_M_IMPORT_FILE:
2175 char import[UTIL_PATH_SIZE];
2177 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2178 if (import_file_into_properties(event->dev, import) != 0)
2179 if (cur->key.op != OP_NOMATCH)
2183 case TK_M_IMPORT_PROG:
2185 char import[UTIL_PATH_SIZE];
2187 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2188 info(event->udev, "IMPORT '%s' %s:%u\n",
2190 &rules->buf[rule->rule.filename_off],
2191 rule->rule.filename_line);
2192 if (import_program_into_properties(event->dev, import) != 0)
2193 if (cur->key.op != OP_NOMATCH)
2197 case TK_M_IMPORT_PARENT:
2199 char import[UTIL_PATH_SIZE];
2201 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2202 if (import_parent_into_properties(event->dev, import) != 0)
2203 if (cur->key.op != OP_NOMATCH)
2208 if (match_key(rules, cur, event->program_result) != 0)
2212 case TK_A_IGNORE_DEVICE:
2213 event->ignore_device = 1;
2216 case TK_A_STRING_ESCAPE_NONE:
2219 case TK_A_STRING_ESCAPE_REPLACE:
2220 esc = ESCAPE_REPLACE;
2222 case TK_A_NUM_FAKE_PART:
2223 if (strcmp(udev_device_get_subsystem(event->dev), "block") != 0)
2225 if (udev_device_get_sysnum(event->dev) != NULL)
2227 udev_device_set_num_fake_partitions(event->dev, cur->key.num_fake_part);
2229 case TK_A_INOTIFY_WATCH:
2230 event->inotify_watch = cur->key.watch;
2232 case TK_A_DEVLINK_PRIO:
2233 udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
2237 char owner[UTIL_NAME_SIZE];
2239 if (event->owner_final)
2241 if (cur->key.op == OP_ASSIGN_FINAL)
2242 event->owner_final = 1;
2243 udev_event_apply_format(event, &rules->buf[cur->key.value_off], owner, sizeof(owner));
2244 event->uid = util_lookup_user(event->udev, owner);
2245 info(event->udev, "OWNER %u %s:%u\n",
2247 &rules->buf[rule->rule.filename_off],
2248 rule->rule.filename_line);
2253 char group[UTIL_NAME_SIZE];
2255 if (event->group_final)
2257 if (cur->key.op == OP_ASSIGN_FINAL)
2258 event->group_final = 1;
2259 udev_event_apply_format(event, &rules->buf[cur->key.value_off], group, sizeof(group));
2260 event->gid = util_lookup_group(event->udev, group);
2261 info(event->udev, "GROUP %u %s:%u\n",
2263 &rules->buf[rule->rule.filename_off],
2264 rule->rule.filename_line);
2269 char mode[UTIL_NAME_SIZE];
2272 if (event->mode_final)
2274 if (cur->key.op == OP_ASSIGN_FINAL)
2275 event->mode_final = 1;
2276 udev_event_apply_format(event, &rules->buf[cur->key.value_off], mode, sizeof(mode));
2277 event->mode = strtol(mode, &endptr, 8);
2278 if (endptr[0] != '\0') {
2279 err(event->udev, "invalide mode '%s' set default mode 0660\n", mode);
2282 info(event->udev, "MODE %#o %s:%u\n",
2284 &rules->buf[rule->rule.filename_off],
2285 rule->rule.filename_line);
2289 if (event->owner_final)
2291 if (cur->key.op == OP_ASSIGN_FINAL)
2292 event->owner_final = 1;
2293 event->uid = cur->key.uid;
2294 info(event->udev, "OWNER %u %s:%u\n",
2296 &rules->buf[rule->rule.filename_off],
2297 rule->rule.filename_line);
2300 if (event->group_final)
2302 if (cur->key.op == OP_ASSIGN_FINAL)
2303 event->group_final = 1;
2304 event->gid = cur->key.gid;
2305 info(event->udev, "GROUP %u %s:%u\n",
2307 &rules->buf[rule->rule.filename_off],
2308 rule->rule.filename_line);
2311 if (event->mode_final)
2313 if (cur->key.op == OP_ASSIGN_FINAL)
2314 event->mode_final = 1;
2315 event->mode = cur->key.mode;
2316 info(event->udev, "MODE %#o %s:%u\n",
2318 &rules->buf[rule->rule.filename_off],
2319 rule->rule.filename_line);
2323 const char *name = &rules->buf[cur->key.attr_off];
2324 char *value = &rules->buf[cur->key.value_off];
2326 if (value[0] != '\0') {
2327 char temp_value[UTIL_NAME_SIZE];
2328 struct udev_list_entry *entry;
2330 udev_event_apply_format(event, value, temp_value, sizeof(temp_value));
2331 entry = udev_device_add_property(event->dev, name, temp_value);
2333 udev_list_entry_set_flag(entry, 1);
2335 udev_device_add_property(event->dev, name, NULL);
2341 const char *name = &rules->buf[cur->key.value_off];
2342 char name_str[UTIL_PATH_SIZE];
2345 if (event->name_final)
2347 if (cur->key.op == OP_ASSIGN_FINAL)
2348 event->name_final = 1;
2349 udev_event_apply_format(event, name, name_str, sizeof(name_str));
2350 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2351 count = udev_util_replace_chars(name_str, "/");
2353 info(event->udev, "%i character(s) replaced\n", count);
2356 event->name = strdup(name_str);
2357 info(event->udev, "NAME '%s' %s:%u\n",
2359 &rules->buf[rule->rule.filename_off],
2360 rule->rule.filename_line);
2365 char temp[UTIL_PATH_SIZE];
2366 char filename[UTIL_PATH_SIZE];
2370 if (event->devlink_final)
2372 if (major(udev_device_get_devnum(event->dev)) == 0)
2374 if (cur->key.op == OP_ASSIGN_FINAL)
2375 event->devlink_final = 1;
2376 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2377 udev_device_cleanup_devlinks_list(event->dev);
2379 /* allow multiple symlinks separated by spaces */
2380 udev_event_apply_format(event, &rules->buf[cur->key.value_off], temp, sizeof(temp));
2381 if (esc == ESCAPE_UNSET)
2382 count = udev_util_replace_chars(temp, "/ ");
2383 else if (esc == ESCAPE_REPLACE)
2384 count = udev_util_replace_chars(temp, "/");
2386 info(event->udev, "%i character(s) replaced\n" , count);
2387 dbg(event->udev, "rule applied, added symlink(s) '%s'\n", temp);
2389 while (isspace(pos[0]))
2391 next = strchr(pos, ' ');
2394 info(event->udev, "LINK '%s' %s:%u\n",
2396 &rules->buf[rule->rule.filename_off],
2397 rule->rule.filename_line);
2398 util_strscpyl(filename, sizeof(filename), udev_get_dev_path(event->udev), "/", pos, NULL);
2399 udev_device_add_devlink(event->dev, filename);
2400 while (isspace(next[1]))
2403 next = strchr(pos, ' ');
2405 if (pos[0] != '\0') {
2406 info(event->udev, "LINK '%s' %s:%u\n",
2408 &rules->buf[rule->rule.filename_off],
2409 rule->rule.filename_line);
2410 util_strscpyl(filename, sizeof(filename), udev_get_dev_path(event->udev), "/", pos, NULL);
2411 udev_device_add_devlink(event->dev, filename);
2415 case TK_A_EVENT_TIMEOUT:
2416 udev_device_set_event_timeout(event->dev, cur->key.event_timeout);
2418 case TK_A_IGNORE_REMOVE:
2419 udev_device_set_ignore_remove(event->dev, 1);
2423 const char *key_name = &rules->buf[cur->key.attr_off];
2424 char attr[UTIL_PATH_SIZE];
2425 char value[UTIL_NAME_SIZE];
2428 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0)
2429 util_strscpyl(attr, sizeof(attr), udev_device_get_syspath(event->dev), "/", key_name, NULL);
2430 attr_subst_subdir(attr, sizeof(attr));
2432 udev_event_apply_format(event, &rules->buf[cur->key.value_off], value, sizeof(value));
2433 info(event->udev, "ATTR '%s' writing '%s' %s:%u\n", attr, value,
2434 &rules->buf[rule->rule.filename_off],
2435 rule->rule.filename_line);
2436 f = fopen(attr, "w");
2438 if (fprintf(f, "%s", value) <= 0)
2439 err(event->udev, "error writing ATTR{%s}: %m\n", attr);
2442 err(event->udev, "error opening ATTR{%s} for writing: %m\n", attr);
2448 struct udev_list_entry *list_entry;
2450 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2451 udev_list_cleanup_entries(event->udev, &event->run_list);
2452 info(event->udev, "RUN '%s' %s:%u\n",
2453 &rules->buf[cur->key.value_off],
2454 &rules->buf[rule->rule.filename_off],
2455 rule->rule.filename_line);
2456 list_entry = udev_list_entry_add(event->udev, &event->run_list,
2457 &rules->buf[cur->key.value_off], NULL, 1, 0);
2458 if (cur->key.ignore_error)
2459 udev_list_entry_set_flag(list_entry, 1);
2463 if (cur->key.rule_goto == 0)
2465 cur = &rules->tokens[cur->key.rule_goto];
2467 case TK_A_LAST_RULE:
2471 case TK_M_PARENTS_MIN:
2472 case TK_M_PARENTS_MAX:
2475 err(rules->udev, "wrong type %u\n", cur->type);
2482 /* fast-forward to next rule */
2483 cur = rule + rule->rule.token_count;
2484 dbg(rules->udev, "forward to rule: %u\n",
2485 (unsigned int) (cur - rules->tokens));