2 * Copyright (C) 2003-2010 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/>.
35 #define PREALLOC_TOKEN 2048
36 #define PREALLOC_STRBUF 32 * 1024
37 #define PREALLOC_TRIE 256
40 unsigned int name_off;
48 /* this node's first child */
49 unsigned int child_idx;
50 /* the next child of our parent node's child list */
51 unsigned int next_child_idx;
52 /* this node's last child (shortcut for append) */
53 unsigned int last_child_idx;
54 unsigned int value_off;
55 unsigned short value_len;
62 unsigned long long *dirs_ts_usec;
65 /* every key in the rules file becomes a token */
67 unsigned int token_cur;
68 unsigned int token_max;
70 /* all key strings are copied to a single string buffer */
74 unsigned int buf_count;
76 /* during rule parsing, strings are indexed and de-duplicated */
77 struct trie_node *trie_nodes;
78 unsigned int trie_nodes_cur;
79 unsigned int trie_nodes_max;
81 /* during rule parsing, uid/gid lookup results are cached */
83 unsigned int uids_cur;
84 unsigned int uids_max;
86 unsigned int gids_cur;
87 unsigned int gids_max;
90 /* KEY=="", KEY!="", KEY+="", KEY="", KEY:="" */
103 enum string_glob_type {
105 GL_PLAIN, /* no special chars */
106 GL_GLOB, /* shell globs ?,*,[] */
107 GL_SPLIT, /* multi-value A|B */
108 GL_SPLIT_GLOB, /* multi-value with glob A*|B* */
109 GL_SOMETHING, /* commonly used "?*" */
112 enum string_subst_type {
119 /* tokens of a rule are sorted/handled in this order */
124 TK_M_ACTION, /* val */
125 TK_M_DEVPATH, /* val */
126 TK_M_KERNEL, /* val */
127 TK_M_DEVLINK, /* val */
129 TK_M_ENV, /* val, attr */
131 TK_M_SUBSYSTEM, /* val */
132 TK_M_DRIVER, /* val */
133 TK_M_WAITFOR, /* val */
134 TK_M_ATTR, /* val, attr */
137 TK_M_KERNELS, /* val */
138 TK_M_SUBSYSTEMS, /* val */
139 TK_M_DRIVERS, /* val */
140 TK_M_ATTRS, /* val, attr */
144 TK_M_TEST, /* val, mode_t */
145 TK_M_EVENT_TIMEOUT, /* int */
146 TK_M_PROGRAM, /* val */
147 TK_M_IMPORT_FILE, /* val */
148 TK_M_IMPORT_PROG, /* val */
149 TK_M_IMPORT_BUILTIN, /* val */
150 TK_M_IMPORT_DB, /* val */
151 TK_M_IMPORT_CMDLINE, /* val */
152 TK_M_IMPORT_PARENT, /* val */
153 TK_M_RESULT, /* val */
156 TK_A_STRING_ESCAPE_NONE,
157 TK_A_STRING_ESCAPE_REPLACE,
159 TK_A_INOTIFY_WATCH, /* int */
160 TK_A_DEVLINK_PRIO, /* int */
161 TK_A_OWNER, /* val */
162 TK_A_GROUP, /* val */
164 TK_A_OWNER_ID, /* uid_t */
165 TK_A_GROUP_ID, /* gid_t */
166 TK_A_MODE_ID, /* mode_t */
167 TK_A_STATIC_NODE, /* val */
168 TK_A_ENV, /* val, attr */
171 TK_A_DEVLINK, /* val */
172 TK_A_ATTR, /* val, attr */
173 TK_A_RUN_BUILTIN, /* val, bool */
174 TK_A_RUN_PROGRAM, /* val, bool */
175 TK_A_GOTO, /* size_t */
180 /* we try to pack stuff in a way that we take only 12 bytes per token */
183 unsigned char type; /* same in rule and key */
185 enum token_type type:8;
187 bool has_static_node:1;
188 unsigned int unused:6;
189 unsigned short token_count;
190 unsigned int label_off;
191 unsigned short filename_off;
192 unsigned short filename_line;
195 enum token_type type:8;
196 enum operation_type op:8;
197 enum string_glob_type glob:8;
198 enum string_subst_type subst:4;
199 enum string_subst_type attrsubst:4;
200 unsigned int value_off;
202 unsigned int attr_off;
204 unsigned int rule_goto;
211 enum udev_builtin_cmd builtin_cmd;
219 struct udev_rules *rules;
221 struct token token[MAX_TK];
222 unsigned int token_cur;
226 static const char *operation_str(enum operation_type type)
228 static const char *operation_strs[] = {
229 [OP_UNSET] = "UNSET",
230 [OP_MATCH] = "match",
231 [OP_NOMATCH] = "nomatch",
232 [OP_MATCH_MAX] = "MATCH_MAX",
235 [OP_ASSIGN] = "assign",
236 [OP_ASSIGN_FINAL] = "assign-final",
239 return operation_strs[type];
242 static const char *string_glob_str(enum string_glob_type type)
244 static const char *string_glob_strs[] = {
245 [GL_UNSET] = "UNSET",
246 [GL_PLAIN] = "plain",
248 [GL_SPLIT] = "split",
249 [GL_SPLIT_GLOB] = "split-glob",
250 [GL_SOMETHING] = "split-glob",
253 return string_glob_strs[type];
256 static const char *token_str(enum token_type type)
258 static const char *token_strs[] = {
259 [TK_UNSET] = "UNSET",
262 [TK_M_ACTION] = "M ACTION",
263 [TK_M_DEVPATH] = "M DEVPATH",
264 [TK_M_KERNEL] = "M KERNEL",
265 [TK_M_DEVLINK] = "M DEVLINK",
266 [TK_M_NAME] = "M NAME",
267 [TK_M_ENV] = "M ENV",
268 [TK_M_TAG] = "M TAG",
269 [TK_M_SUBSYSTEM] = "M SUBSYSTEM",
270 [TK_M_DRIVER] = "M DRIVER",
271 [TK_M_WAITFOR] = "M WAITFOR",
272 [TK_M_ATTR] = "M ATTR",
274 [TK_M_PARENTS_MIN] = "M PARENTS_MIN",
275 [TK_M_KERNELS] = "M KERNELS",
276 [TK_M_SUBSYSTEMS] = "M SUBSYSTEMS",
277 [TK_M_DRIVERS] = "M DRIVERS",
278 [TK_M_ATTRS] = "M ATTRS",
279 [TK_M_TAGS] = "M TAGS",
280 [TK_M_PARENTS_MAX] = "M PARENTS_MAX",
282 [TK_M_TEST] = "M TEST",
283 [TK_M_EVENT_TIMEOUT] = "M EVENT_TIMEOUT",
284 [TK_M_PROGRAM] = "M PROGRAM",
285 [TK_M_IMPORT_FILE] = "M IMPORT_FILE",
286 [TK_M_IMPORT_PROG] = "M IMPORT_PROG",
287 [TK_M_IMPORT_BUILTIN] = "M IMPORT_BUILTIN",
288 [TK_M_IMPORT_DB] = "M IMPORT_DB",
289 [TK_M_IMPORT_CMDLINE] = "M IMPORT_CMDLINE",
290 [TK_M_IMPORT_PARENT] = "M IMPORT_PARENT",
291 [TK_M_RESULT] = "M RESULT",
292 [TK_M_MAX] = "M MAX",
294 [TK_A_STRING_ESCAPE_NONE] = "A STRING_ESCAPE_NONE",
295 [TK_A_STRING_ESCAPE_REPLACE] = "A STRING_ESCAPE_REPLACE",
296 [TK_A_DB_PERSIST] = "A DB_PERSIST",
297 [TK_A_INOTIFY_WATCH] = "A INOTIFY_WATCH",
298 [TK_A_DEVLINK_PRIO] = "A DEVLINK_PRIO",
299 [TK_A_OWNER] = "A OWNER",
300 [TK_A_GROUP] = "A GROUP",
301 [TK_A_MODE] = "A MODE",
302 [TK_A_OWNER_ID] = "A OWNER_ID",
303 [TK_A_GROUP_ID] = "A GROUP_ID",
304 [TK_A_STATIC_NODE] = "A STATIC_NODE",
305 [TK_A_MODE_ID] = "A MODE_ID",
306 [TK_A_ENV] = "A ENV",
307 [TK_A_TAG] = "A ENV",
308 [TK_A_NAME] = "A NAME",
309 [TK_A_DEVLINK] = "A DEVLINK",
310 [TK_A_ATTR] = "A ATTR",
311 [TK_A_RUN_BUILTIN] = "A RUN_BUILTIN",
312 [TK_A_RUN_PROGRAM] = "A RUN_PROGRAM",
313 [TK_A_GOTO] = "A GOTO",
318 return token_strs[type];
321 static void dump_token(struct udev_rules *rules, struct token *token)
323 enum token_type type = token->type;
324 enum operation_type op = token->key.op;
325 enum string_glob_type glob = token->key.glob;
326 const char *value = &rules->buf[token->key.value_off];
327 const char *attr = &rules->buf[token->key.attr_off];
332 const char *tks_ptr = (char *)rules->tokens;
333 const char *tk_ptr = (char *)token;
334 unsigned int idx = (tk_ptr - tks_ptr) / sizeof(struct token);
336 log_debug("* RULE %s:%u, token: %u, count: %u, label: '%s'\n",
337 &rules->buf[token->rule.filename_off], token->rule.filename_line,
338 idx, token->rule.token_count,
339 &rules->buf[token->rule.label_off]);
351 case TK_M_SUBSYSTEMS:
355 case TK_M_IMPORT_FILE:
356 case TK_M_IMPORT_PROG:
358 case TK_M_IMPORT_CMDLINE:
359 case TK_M_IMPORT_PARENT:
366 case TK_A_RUN_BUILTIN:
367 case TK_A_RUN_PROGRAM:
368 log_debug("%s %s '%s'(%s)\n",
369 token_str(type), operation_str(op), value, string_glob_str(glob));
371 case TK_M_IMPORT_BUILTIN:
372 log_debug("%s %i '%s'\n", token_str(type), token->key.builtin_cmd, value);
379 log_debug("%s %s '%s' '%s'(%s)\n",
380 token_str(type), operation_str(op), attr, value, string_glob_str(glob));
384 log_debug("%s %s '%s'\n", token_str(type), operation_str(op), value);
386 case TK_A_STRING_ESCAPE_NONE:
387 case TK_A_STRING_ESCAPE_REPLACE:
388 case TK_A_DB_PERSIST:
389 log_debug("%s\n", token_str(type));
392 log_debug("%s %s '%s'(%s) %#o\n",
393 token_str(type), operation_str(op), value, string_glob_str(glob), token->key.mode);
395 case TK_A_INOTIFY_WATCH:
396 log_debug("%s %u\n", token_str(type), token->key.watch);
398 case TK_A_DEVLINK_PRIO:
399 log_debug("%s %u\n", token_str(type), token->key.devlink_prio);
402 log_debug("%s %s %u\n", token_str(type), operation_str(op), token->key.uid);
405 log_debug("%s %s %u\n", token_str(type), operation_str(op), token->key.gid);
408 log_debug("%s %s %#o\n", token_str(type), operation_str(op), token->key.mode);
410 case TK_A_STATIC_NODE:
411 log_debug("%s '%s'\n", token_str(type), value);
413 case TK_M_EVENT_TIMEOUT:
414 log_debug("%s %u\n", token_str(type), token->key.event_timeout);
417 log_debug("%s '%s' %u\n", token_str(type), value, token->key.rule_goto);
420 log_debug("* %s\n", token_str(type));
422 case TK_M_PARENTS_MIN:
423 case TK_M_PARENTS_MAX:
426 log_debug("unknown type %u\n", type);
431 static void dump_rules(struct udev_rules *rules)
435 log_debug("dumping %u (%zu bytes) tokens, %u (%zu bytes) strings\n",
437 rules->token_cur * sizeof(struct token),
440 for(i = 0; i < rules->token_cur; i++)
441 dump_token(rules, &rules->tokens[i]);
444 static inline const char *operation_str(enum operation_type type) { return NULL; }
445 static inline const char *token_str(enum token_type type) { return NULL; }
446 static inline void dump_token(struct udev_rules *rules, struct token *token) {}
447 static inline void dump_rules(struct udev_rules *rules) {}
450 static int add_new_string(struct udev_rules *rules, const char *str, size_t bytes)
454 /* grow buffer if needed */
455 if (rules->buf_cur + bytes+1 >= rules->buf_max) {
459 /* double the buffer size */
460 add = rules->buf_max;
464 buf = realloc(rules->buf, rules->buf_max + add);
468 rules->buf_max += add;
470 off = rules->buf_cur;
471 memcpy(&rules->buf[rules->buf_cur], str, bytes);
472 rules->buf_cur += bytes;
477 static int add_string(struct udev_rules *rules, const char *str)
479 unsigned int node_idx;
480 struct trie_node *new_node;
481 unsigned int new_node_idx;
486 struct trie_node *parent;
488 /* walk trie, start from last character of str to find matching tails */
492 for (depth = 0; depth <= len; depth++) {
493 struct trie_node *node;
494 unsigned int child_idx;
496 node = &rules->trie_nodes[node_idx];
497 off = node->value_off + node->value_len - len;
499 /* match against current node */
500 if (depth == len || (node->value_len >= len && memcmp(&rules->buf[off], str, len) == 0))
503 /* lookup child node */
504 key = str[len - 1 - depth];
505 child_idx = node->child_idx;
506 while (child_idx > 0) {
507 struct trie_node *child;
509 child = &rules->trie_nodes[child_idx];
510 if (child->key == key)
512 child_idx = child->next_child_idx;
516 node_idx = child_idx;
519 /* string not found, add it */
520 off = add_new_string(rules, str, len + 1);
522 /* grow trie nodes if needed */
523 if (rules->trie_nodes_cur >= rules->trie_nodes_max) {
524 struct trie_node *nodes;
527 /* double the buffer size */
528 add = rules->trie_nodes_max;
532 nodes = realloc(rules->trie_nodes, (rules->trie_nodes_max + add) * sizeof(struct trie_node));
535 rules->trie_nodes = nodes;
536 rules->trie_nodes_max += add;
540 new_node_idx = rules->trie_nodes_cur;
541 rules->trie_nodes_cur++;
542 new_node = &rules->trie_nodes[new_node_idx];
543 memset(new_node, 0x00, sizeof(struct trie_node));
544 new_node->value_off = off;
545 new_node->value_len = len;
548 /* join the parent's child list */
549 parent = &rules->trie_nodes[node_idx];
550 if (parent->child_idx == 0) {
551 parent->child_idx = new_node_idx;
553 struct trie_node *last_child;
555 last_child = &rules->trie_nodes[parent->last_child_idx];
556 last_child->next_child_idx = new_node_idx;
558 parent->last_child_idx = new_node_idx;
562 static int add_token(struct udev_rules *rules, struct token *token)
564 /* grow buffer if needed */
565 if (rules->token_cur+1 >= rules->token_max) {
566 struct token *tokens;
569 /* double the buffer size */
570 add = rules->token_max;
574 tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
577 rules->tokens = tokens;
578 rules->token_max += add;
580 memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
585 static uid_t add_uid(struct udev_rules *rules, const char *owner)
591 /* lookup, if we know it already */
592 for (i = 0; i < rules->uids_cur; i++) {
593 off = rules->uids[i].name_off;
594 if (streq(&rules->buf[off], owner)) {
595 uid = rules->uids[i].uid;
599 uid = util_lookup_user(rules->udev, owner);
601 /* grow buffer if needed */
602 if (rules->uids_cur+1 >= rules->uids_max) {
603 struct uid_gid *uids;
606 /* double the buffer size */
607 add = rules->uids_max;
611 uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
615 rules->uids_max += add;
617 rules->uids[rules->uids_cur].uid = uid;
618 off = add_string(rules, owner);
621 rules->uids[rules->uids_cur].name_off = off;
626 static gid_t add_gid(struct udev_rules *rules, const char *group)
632 /* lookup, if we know it already */
633 for (i = 0; i < rules->gids_cur; i++) {
634 off = rules->gids[i].name_off;
635 if (streq(&rules->buf[off], group)) {
636 gid = rules->gids[i].gid;
640 gid = util_lookup_group(rules->udev, group);
642 /* grow buffer if needed */
643 if (rules->gids_cur+1 >= rules->gids_max) {
644 struct uid_gid *gids;
647 /* double the buffer size */
648 add = rules->gids_max;
652 gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid));
656 rules->gids_max += add;
658 rules->gids[rules->gids_cur].gid = gid;
659 off = add_string(rules, group);
662 rules->gids[rules->gids_cur].name_off = off;
667 static int import_property_from_string(struct udev_device *dev, char *line)
675 while (isspace(key[0]))
678 /* comment or empty line */
679 if (key[0] == '#' || key[0] == '\0')
682 /* split key/value */
683 val = strchr(key, '=');
690 while (isspace(val[0]))
697 while (isspace(key[len-1]))
701 /* terminate value */
705 while (isspace(val[len-1]))
713 if (val[0] == '"' || val[0] == '\'') {
714 if (val[len-1] != val[0]) {
715 log_debug("inconsistent quoting: '%s', skip\n", line);
722 /* handle device, renamed by external tool, returning new path */
723 if (streq(key, "DEVPATH")) {
724 char syspath[UTIL_PATH_SIZE];
726 log_debug("updating devpath from '%s' to '%s'\n",
727 udev_device_get_devpath(dev), val);
728 util_strscpyl(syspath, sizeof(syspath), "/sys", val, NULL);
729 udev_device_set_syspath(dev, syspath);
731 struct udev_list_entry *entry;
733 entry = udev_device_add_property(dev, key, val);
734 /* store in db, skip private keys */
736 udev_list_entry_set_num(entry, true);
741 static int import_file_into_properties(struct udev_device *dev, const char *filename)
744 char line[UTIL_LINE_SIZE];
746 f = fopen(filename, "r");
749 while (fgets(line, sizeof(line), f) != NULL)
750 import_property_from_string(dev, line);
755 static int import_program_into_properties(struct udev_event *event, const char *program, const sigset_t *sigmask)
757 struct udev_device *dev = event->dev;
759 char result[UTIL_LINE_SIZE];
763 envp = udev_device_get_properties_envp(dev);
764 err = udev_event_spawn(event, program, envp, sigmask, result, sizeof(result));
769 while (line != NULL) {
772 pos = strchr(line, '\n');
777 import_property_from_string(dev, line);
783 static int import_parent_into_properties(struct udev_device *dev, const char *filter)
785 struct udev_device *dev_parent;
786 struct udev_list_entry *list_entry;
788 dev_parent = udev_device_get_parent(dev);
789 if (dev_parent == NULL)
792 udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
793 const char *key = udev_list_entry_get_name(list_entry);
794 const char *val = udev_list_entry_get_value(list_entry);
796 if (fnmatch(filter, key, 0) == 0) {
797 struct udev_list_entry *entry;
799 entry = udev_device_add_property(dev, key, val);
800 /* store in db, skip private keys */
802 udev_list_entry_set_num(entry, true);
808 #define WAIT_LOOP_PER_SECOND 50
809 static int wait_for_file(struct udev_device *dev, const char *file, int timeout)
811 char filepath[UTIL_PATH_SIZE];
812 char devicepath[UTIL_PATH_SIZE];
814 int loop = timeout * WAIT_LOOP_PER_SECOND;
816 /* a relative path is a device attribute */
817 devicepath[0] = '\0';
818 if (file[0] != '/') {
819 util_strscpyl(devicepath, sizeof(devicepath), udev_device_get_syspath(dev), NULL);
820 util_strscpyl(filepath, sizeof(filepath), devicepath, "/", file, NULL);
825 const struct timespec duration = { 0, 1000 * 1000 * 1000 / WAIT_LOOP_PER_SECOND };
828 if (stat(file, &stats) == 0) {
829 log_debug("file '%s' appeared after %i loops\n", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
832 /* make sure, the device did not disappear in the meantime */
833 if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
834 log_debug("device disappeared while waiting for '%s'\n", file);
837 log_debug("wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND);
838 nanosleep(&duration, NULL);
840 log_debug("waiting for '%s' failed\n", file);
844 static int attr_subst_subdir(char *attr, size_t len)
848 if (strstr(attr, "/*/")) {
850 char dirname[UTIL_PATH_SIZE];
854 util_strscpy(dirname, sizeof(dirname), attr);
855 pos = strstr(dirname, "/*/");
860 dir = opendir(dirname);
864 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
867 if (dent->d_name[0] == '.')
869 util_strscpyl(attr, len, dirname, "/", dent->d_name, tail, NULL);
870 if (stat(attr, &stats) == 0) {
882 static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value)
888 if (linepos == NULL || linepos[0] == '\0')
891 /* skip whitespace */
892 while (isspace(linepos[0]) || linepos[0] == ',')
896 if (linepos[0] == '\0')
902 if (linepos[0] == '\0')
904 if (isspace(linepos[0]))
906 if (linepos[0] == '=')
908 if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
909 if (linepos[1] == '=')
913 /* remember end of key */
916 /* skip whitespace after key */
917 while (isspace(linepos[0]))
919 if (linepos[0] == '\0')
922 /* get operation type */
923 if (linepos[0] == '=' && linepos[1] == '=') {
926 } else if (linepos[0] == '!' && linepos[1] == '=') {
929 } else if (linepos[0] == '+' && linepos[1] == '=') {
932 } else if (linepos[0] == '=') {
935 } else if (linepos[0] == ':' && linepos[1] == '=') {
936 *op = OP_ASSIGN_FINAL;
944 /* skip whitespace after operator */
945 while (isspace(linepos[0]))
947 if (linepos[0] == '\0')
951 if (linepos[0] == '"')
958 temp = strchr(linepos, '"');
964 /* move line to next key */
969 /* extract possible KEY{attr} */
970 static const char *get_key_attribute(struct udev *udev, char *str)
975 attr = strchr(str, '{');
978 pos = strchr(attr, '}');
980 log_error("missing closing brace for format\n");
989 static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
990 enum operation_type op,
991 const char *value, const void *data)
993 struct token *token = &rule_tmp->token[rule_tmp->token_cur];
994 const char *attr = NULL;
996 memset(token, 0x00, sizeof(struct token));
1002 case TK_M_SUBSYSTEM:
1008 case TK_M_SUBSYSTEMS:
1012 case TK_M_IMPORT_FILE:
1013 case TK_M_IMPORT_PROG:
1014 case TK_M_IMPORT_DB:
1015 case TK_M_IMPORT_CMDLINE:
1016 case TK_M_IMPORT_PARENT:
1025 token->key.value_off = add_string(rule_tmp->rules, value);
1027 case TK_M_IMPORT_BUILTIN:
1028 token->key.value_off = add_string(rule_tmp->rules, value);
1029 token->key.builtin_cmd = *(enum udev_builtin_cmd *)data;
1037 token->key.value_off = add_string(rule_tmp->rules, value);
1038 token->key.attr_off = add_string(rule_tmp->rules, attr);
1041 token->key.value_off = add_string(rule_tmp->rules, value);
1042 token->key.devlink_unique = *(int *)data;
1045 token->key.value_off = add_string(rule_tmp->rules, value);
1047 token->key.mode = *(mode_t *)data;
1049 case TK_A_STRING_ESCAPE_NONE:
1050 case TK_A_STRING_ESCAPE_REPLACE:
1051 case TK_A_DB_PERSIST:
1053 case TK_A_RUN_BUILTIN:
1054 case TK_A_RUN_PROGRAM:
1055 token->key.builtin_cmd = *(enum udev_builtin_cmd *)data;
1056 token->key.value_off = add_string(rule_tmp->rules, value);
1058 case TK_A_INOTIFY_WATCH:
1059 case TK_A_DEVLINK_PRIO:
1060 token->key.devlink_prio = *(int *)data;
1063 token->key.uid = *(uid_t *)data;
1066 token->key.gid = *(gid_t *)data;
1069 token->key.mode = *(mode_t *)data;
1071 case TK_A_STATIC_NODE:
1072 token->key.value_off = add_string(rule_tmp->rules, value);
1074 case TK_M_EVENT_TIMEOUT:
1075 token->key.event_timeout = *(int *)data;
1078 case TK_M_PARENTS_MIN:
1079 case TK_M_PARENTS_MAX:
1083 log_error("wrong type %u\n", type);
1087 if (value != NULL && type < TK_M_MAX) {
1088 /* check if we need to split or call fnmatch() while matching rules */
1089 enum string_glob_type glob;
1093 has_split = (strchr(value, '|') != NULL);
1094 has_glob = (strchr(value, '*') != NULL || strchr(value, '?') != NULL || strchr(value, '[') != NULL);
1095 if (has_split && has_glob) {
1096 glob = GL_SPLIT_GLOB;
1097 } else if (has_split) {
1099 } else if (has_glob) {
1100 if (streq(value, "?*"))
1101 glob = GL_SOMETHING;
1107 token->key.glob = glob;
1110 if (value != NULL && type > TK_M_MAX) {
1111 /* check if assigned value has substitution chars */
1112 if (value[0] == '[')
1113 token->key.subst = SB_SUBSYS;
1114 else if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
1115 token->key.subst = SB_FORMAT;
1117 token->key.subst = SB_NONE;
1121 /* check if property/attribut name has substitution chars */
1123 token->key.attrsubst = SB_SUBSYS;
1124 else if (strchr(attr, '%') != NULL || strchr(attr, '$') != NULL)
1125 token->key.attrsubst = SB_FORMAT;
1127 token->key.attrsubst = SB_NONE;
1130 token->key.type = type;
1132 rule_tmp->token_cur++;
1133 if (rule_tmp->token_cur >= ELEMENTSOF(rule_tmp->token)) {
1134 log_error("temporary rule array too small\n");
1140 static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp)
1143 unsigned int start = 0;
1144 unsigned int end = rule_tmp->token_cur;
1146 for (i = 0; i < rule_tmp->token_cur; i++) {
1147 enum token_type next_val = TK_UNSET;
1148 unsigned int next_idx = 0;
1151 /* find smallest value */
1152 for (j = start; j < end; j++) {
1153 if (rule_tmp->token[j].type == TK_UNSET)
1155 if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
1156 next_val = rule_tmp->token[j].type;
1161 /* add token and mark done */
1162 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
1164 rule_tmp->token[next_idx].type = TK_UNSET;
1167 if (next_idx == start)
1169 if (next_idx+1 == end)
1175 static int add_rule(struct udev_rules *rules, char *line,
1176 const char *filename, unsigned int filename_off, unsigned int lineno)
1180 struct rule_tmp rule_tmp;
1182 memset(&rule_tmp, 0x00, sizeof(struct rule_tmp));
1183 rule_tmp.rules = rules;
1184 rule_tmp.rule.type = TK_RULE;
1185 /* the offset in the rule is limited to unsigned short */
1186 if (filename_off < USHRT_MAX)
1187 rule_tmp.rule.rule.filename_off = filename_off;
1188 rule_tmp.rule.rule.filename_line = lineno;
1194 enum operation_type op;
1196 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0)
1199 if (streq(key, "ACTION")) {
1200 if (op > OP_MATCH_MAX) {
1201 log_error("invalid ACTION operation\n");
1204 rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL);
1208 if (streq(key, "DEVPATH")) {
1209 if (op > OP_MATCH_MAX) {
1210 log_error("invalid DEVPATH operation\n");
1213 rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
1217 if (streq(key, "KERNEL")) {
1218 if (op > OP_MATCH_MAX) {
1219 log_error("invalid KERNEL operation\n");
1222 rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL);
1226 if (streq(key, "SUBSYSTEM")) {
1227 if (op > OP_MATCH_MAX) {
1228 log_error("invalid SUBSYSTEM operation\n");
1231 /* bus, class, subsystem events should all be the same */
1232 if (streq(value, "subsystem") ||
1233 streq(value, "bus") ||
1234 streq(value, "class")) {
1235 if (streq(value, "bus") || streq(value, "class"))
1236 log_error("'%s' must be specified as 'subsystem' \n"
1237 "please fix it in %s:%u", value, filename, lineno);
1238 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
1240 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
1244 if (streq(key, "DRIVER")) {
1245 if (op > OP_MATCH_MAX) {
1246 log_error("invalid DRIVER operation\n");
1249 rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL);
1253 if (startswith(key, "ATTR{")) {
1254 attr = get_key_attribute(rules->udev, key + sizeof("ATTR")-1);
1256 log_error("error parsing ATTR attribute\n");
1259 if (op < OP_MATCH_MAX) {
1260 rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
1262 rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr);
1267 if (streq(key, "KERNELS")) {
1268 if (op > OP_MATCH_MAX) {
1269 log_error("invalid KERNELS operation\n");
1272 rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1276 if (streq(key, "SUBSYSTEMS")) {
1277 if (op > OP_MATCH_MAX) {
1278 log_error("invalid SUBSYSTEMS operation\n");
1281 rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1285 if (streq(key, "DRIVERS")) {
1286 if (op > OP_MATCH_MAX) {
1287 log_error("invalid DRIVERS operation\n");
1290 rule_add_key(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
1294 if (startswith(key, "ATTRS{")) {
1295 if (op > OP_MATCH_MAX) {
1296 log_error("invalid ATTRS operation\n");
1299 attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
1301 log_error("error parsing ATTRS attribute\n");
1304 if (startswith(attr, "device/"))
1305 log_error("the 'device' link may not be available in a future kernel, "
1306 "please fix it in %s:%u", filename, lineno);
1307 else if (strstr(attr, "../") != NULL)
1308 log_error("do not reference parent sysfs directories directly, "
1309 "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
1310 rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1314 if (streq(key, "TAGS")) {
1315 if (op > OP_MATCH_MAX) {
1316 log_error("invalid TAGS operation\n");
1319 rule_add_key(&rule_tmp, TK_M_TAGS, op, value, NULL);
1323 if (startswith(key, "ENV{")) {
1324 attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1);
1326 log_error("error parsing ENV attribute\n");
1329 if (op < OP_MATCH_MAX) {
1330 if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
1333 static const char *blacklist[] = {
1348 for (i = 0; i < ELEMENTSOF(blacklist); i++) {
1349 if (!streq(attr, blacklist[i]))
1351 log_error("invalid ENV attribute, '%s' can not be set %s:%u\n", attr, filename, lineno);
1354 if (rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
1360 if (streq(key, "TAG")) {
1361 if (op < OP_MATCH_MAX)
1362 rule_add_key(&rule_tmp, TK_M_TAG, op, value, NULL);
1364 rule_add_key(&rule_tmp, TK_A_TAG, op, value, NULL);
1368 if (streq(key, "PROGRAM")) {
1369 rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
1373 if (streq(key, "RESULT")) {
1374 if (op > OP_MATCH_MAX) {
1375 log_error("invalid RESULT operation\n");
1378 rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL);
1382 if (startswith(key, "IMPORT")) {
1383 attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1);
1385 log_error("IMPORT{} type missing, ignoring IMPORT %s:%u\n", filename, lineno);
1388 if (streq(attr, "program")) {
1389 /* find known built-in command */
1390 if (value[0] != '/') {
1391 enum udev_builtin_cmd cmd;
1393 cmd = udev_builtin_lookup(value);
1394 if (cmd < UDEV_BUILTIN_MAX) {
1395 log_debug("IMPORT found builtin '%s', replacing %s:%u\n",
1396 value, filename, lineno);
1397 rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, value, &cmd);
1401 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1402 } else if (streq(attr, "builtin")) {
1403 enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
1405 if (cmd < UDEV_BUILTIN_MAX)
1406 rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, value, &cmd);
1408 log_error("IMPORT{builtin}: '%s' unknown %s:%u\n", value, filename, lineno);
1409 } else if (streq(attr, "file")) {
1410 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1411 } else if (streq(attr, "db")) {
1412 rule_add_key(&rule_tmp, TK_M_IMPORT_DB, op, value, NULL);
1413 } else if (streq(attr, "cmdline")) {
1414 rule_add_key(&rule_tmp, TK_M_IMPORT_CMDLINE, op, value, NULL);
1415 } else if (streq(attr, "parent")) {
1416 rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
1418 log_error("IMPORT{} unknown type, ignoring IMPORT %s:%u\n", filename, lineno);
1422 if (startswith(key, "TEST")) {
1425 if (op > OP_MATCH_MAX) {
1426 log_error("invalid TEST operation\n");
1429 attr = get_key_attribute(rules->udev, key + sizeof("TEST")-1);
1431 mode = strtol(attr, NULL, 8);
1432 rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode);
1434 rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL);
1439 if (startswith(key, "RUN")) {
1440 attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1);
1444 if (streq(attr, "builtin")) {
1445 enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
1447 if (cmd < UDEV_BUILTIN_MAX)
1448 rule_add_key(&rule_tmp, TK_A_RUN_BUILTIN, op, value, &cmd);
1450 log_error("IMPORT{builtin}: '%s' unknown %s:%u\n", value, filename, lineno);
1451 } else if (streq(attr, "program")) {
1452 enum udev_builtin_cmd cmd = UDEV_BUILTIN_MAX;
1454 rule_add_key(&rule_tmp, TK_A_RUN_PROGRAM, op, value, &cmd);
1456 log_error("RUN{} unknown type, ignoring RUN %s:%u\n", filename, lineno);
1462 if (streq(key, "WAIT_FOR") || streq(key, "WAIT_FOR_SYSFS")) {
1463 rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1467 if (streq(key, "LABEL")) {
1468 rule_tmp.rule.rule.label_off = add_string(rules, value);
1472 if (streq(key, "GOTO")) {
1473 rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1477 if (startswith(key, "NAME")) {
1478 if (op < OP_MATCH_MAX) {
1479 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
1481 if (streq(value, "%k")) {
1482 log_error("NAME=\"%%k\" is ignored, because it breaks kernel supplied names, "
1483 "please remove it from %s:%u\n", filename, lineno);
1486 if (value[0] == '\0') {
1487 log_debug("NAME=\"\" is ignored, because udev will not delete any device nodes, "
1488 "please remove it from %s:%u\n", filename, lineno);
1491 rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL);
1493 rule_tmp.rule.rule.can_set_name = true;
1497 if (startswith(key, "SYMLINK")) {
1498 if (op < OP_MATCH_MAX) {
1499 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
1503 attr = get_key_attribute(rules->udev, key + sizeof("SYMLINK")-1);
1504 if (attr != NULL && strstr(attr, "unique") != NULL)
1506 rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, &flag);
1508 rule_tmp.rule.rule.can_set_name = true;
1512 if (streq(key, "OWNER")) {
1516 uid = strtoul(value, &endptr, 10);
1517 if (endptr[0] == '\0') {
1518 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1519 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1520 uid = add_uid(rules, value);
1521 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1522 } else if (rules->resolve_names >= 0) {
1523 rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
1525 rule_tmp.rule.rule.can_set_name = true;
1529 if (streq(key, "GROUP")) {
1533 gid = strtoul(value, &endptr, 10);
1534 if (endptr[0] == '\0') {
1535 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1536 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1537 gid = add_gid(rules, value);
1538 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1539 } else if (rules->resolve_names >= 0) {
1540 rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
1542 rule_tmp.rule.rule.can_set_name = true;
1546 if (streq(key, "MODE")) {
1550 mode = strtol(value, &endptr, 8);
1551 if (endptr[0] == '\0')
1552 rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1554 rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
1555 rule_tmp.rule.rule.can_set_name = true;
1559 if (streq(key, "OPTIONS")) {
1562 pos = strstr(value, "link_priority=");
1564 int prio = atoi(&pos[strlen("link_priority=")]);
1566 rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, op, NULL, &prio);
1569 pos = strstr(value, "event_timeout=");
1571 int tout = atoi(&pos[strlen("event_timeout=")]);
1573 rule_add_key(&rule_tmp, TK_M_EVENT_TIMEOUT, op, NULL, &tout);
1576 pos = strstr(value, "string_escape=");
1578 pos = &pos[strlen("string_escape=")];
1579 if (startswith(pos, "none"))
1580 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, op, NULL, NULL);
1581 else if (startswith(pos, "replace"))
1582 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, op, NULL, NULL);
1585 pos = strstr(value, "db_persist");
1587 rule_add_key(&rule_tmp, TK_A_DB_PERSIST, op, NULL, NULL);
1589 pos = strstr(value, "nowatch");
1593 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &off);
1595 pos = strstr(value, "watch");
1599 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &on);
1603 pos = strstr(value, "static_node=");
1605 rule_add_key(&rule_tmp, TK_A_STATIC_NODE, op, &pos[strlen("static_node=")], NULL);
1606 rule_tmp.rule.rule.has_static_node = true;
1612 log_error("unknown key '%s' in %s:%u\n", key, filename, lineno);
1616 /* add rule token */
1617 rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur;
1618 if (add_token(rules, &rule_tmp.rule) != 0)
1621 /* add tokens to list, sorted by type */
1622 if (sort_token(rules, &rule_tmp) != 0)
1627 log_error("invalid rule '%s:%u'\n", filename, lineno);
1631 static int parse_file(struct udev_rules *rules, const char *filename)
1634 unsigned int first_token;
1635 unsigned int filename_off;
1636 char line[UTIL_LINE_SIZE];
1640 if (null_or_empty_path(filename)) {
1641 log_debug("skip empty file: %s\n", filename);
1644 log_debug("read rules file: %s\n", filename);
1646 f = fopen(filename, "r");
1650 first_token = rules->token_cur;
1651 filename_off = add_string(rules, filename);
1653 while (fgets(line, sizeof(line), f) != NULL) {
1657 /* skip whitespace */
1660 while (isspace(key[0]))
1671 /* continue reading if backslash+newline is found */
1672 while (line[len-2] == '\\') {
1673 if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1675 if (strlen(&line[len-2]) < 2)
1681 if (len+1 >= sizeof(line)) {
1682 log_error("line too long '%s':%u, ignored\n", filename, line_nr);
1685 add_rule(rules, key, filename, filename_off, line_nr);
1689 /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1690 for (i = first_token+1; i < rules->token_cur; i++) {
1691 if (rules->tokens[i].type == TK_A_GOTO) {
1692 char *label = &rules->buf[rules->tokens[i].key.value_off];
1695 for (j = i+1; j < rules->token_cur; j++) {
1696 if (rules->tokens[j].type != TK_RULE)
1698 if (rules->tokens[j].rule.label_off == 0)
1700 if (!streq(label, &rules->buf[rules->tokens[j].rule.label_off]))
1702 rules->tokens[i].key.rule_goto = j;
1705 if (rules->tokens[i].key.rule_goto == 0)
1706 log_error("GOTO '%s' has no matching label in: '%s'\n", label, filename);
1712 struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
1714 struct udev_rules *rules;
1715 struct udev_list file_list;
1716 struct token end_token;
1720 rules = calloc(1, sizeof(struct udev_rules));
1724 rules->resolve_names = resolve_names;
1725 udev_list_init(udev, &file_list, true);
1727 /* init token array and string buffer */
1728 rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
1729 if (rules->tokens == NULL) {
1733 rules->token_max = PREALLOC_TOKEN;
1735 rules->buf = malloc(PREALLOC_STRBUF);
1736 if (rules->buf == NULL) {
1737 free(rules->tokens);
1741 rules->buf_max = PREALLOC_STRBUF;
1742 /* offset 0 is always '\0' */
1743 rules->buf[0] = '\0';
1746 rules->trie_nodes = malloc(PREALLOC_TRIE * sizeof(struct trie_node));
1747 if (rules->trie_nodes == NULL) {
1749 free(rules->tokens);
1753 rules->trie_nodes_max = PREALLOC_TRIE;
1754 /* offset 0 is the trie root, with an empty string */
1755 memset(rules->trie_nodes, 0x00, sizeof(struct trie_node));
1756 rules->trie_nodes_cur = 1;
1758 rules->dirs = strv_new(TEST_PREFIX SYSCONFDIR "/udev/rules.d",
1759 TEST_PREFIX "/run/udev/rules.d",
1760 TEST_PREFIX UDEVLIBEXECDIR "/rules.d",
1763 log_error("failed to build config directory array");
1766 if (!strv_path_canonicalize(rules->dirs)) {
1767 log_error("failed to canonicalize config directories\n");
1770 strv_uniq(rules->dirs);
1771 r = conf_files_list_strv(&files, ".rules", (const char **)rules->dirs);
1773 log_error("failed to enumerate rules files: %s\n", strerror(-r));
1776 rules->dirs_ts_usec = calloc(strv_length(rules->dirs), sizeof(long long));
1779 * The offset value in the rules strct is limited; add all
1780 * rules file names to the beginning of the string buffer.
1782 STRV_FOREACH(f, files)
1783 add_string(rules, *f);
1785 STRV_FOREACH(f, files)
1786 parse_file(rules, *f);
1790 memset(&end_token, 0x00, sizeof(struct token));
1791 end_token.type = TK_END;
1792 add_token(rules, &end_token);
1794 /* shrink allocated token and string buffer */
1795 if (rules->token_cur < rules->token_max) {
1796 struct token *tokens;
1798 tokens = realloc(rules->tokens, rules->token_cur * sizeof(struct token));
1799 if (tokens != NULL || rules->token_cur == 0) {
1800 rules->tokens = tokens;
1801 rules->token_max = rules->token_cur;
1804 if (rules->buf_cur < rules->buf_max) {
1807 buf = realloc(rules->buf, rules->buf_cur);
1808 if (buf != NULL || rules->buf_cur == 0) {
1810 rules->buf_max = rules->buf_cur;
1813 log_debug("rules use %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1814 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1815 log_debug("temporary index used %zu bytes (%u * %zu bytes)\n",
1816 rules->trie_nodes_cur * sizeof(struct trie_node),
1817 rules->trie_nodes_cur, sizeof(struct trie_node));
1820 free(rules->trie_nodes);
1821 rules->trie_nodes = NULL;
1822 rules->trie_nodes_cur = 0;
1823 rules->trie_nodes_max = 0;
1825 /* cleanup uid/gid cache */
1828 rules->uids_cur = 0;
1829 rules->uids_max = 0;
1832 rules->gids_cur = 0;
1833 rules->gids_max = 0;
1839 struct udev_rules *udev_rules_unref(struct udev_rules *rules)
1843 free(rules->tokens);
1845 free(rules->trie_nodes);
1848 strv_free(rules->dirs);
1849 free(rules->dirs_ts_usec);
1854 bool udev_rules_check_timestamp(struct udev_rules *rules)
1857 bool changed = false;
1859 for (i = 0; rules->dirs[i]; i++) {
1862 if (stat(rules->dirs[i], &stats) < 0)
1865 if (rules->dirs_ts_usec[i] == ts_usec(&stats.st_mtim))
1869 if (rules->dirs_ts_usec[i] != 0) {
1870 log_debug("reload - timestamp of '%s' changed\n", rules->dirs[i]);
1874 /* update timestamp */
1875 rules->dirs_ts_usec[i] = ts_usec(&stats.st_mtim);
1881 static int match_key(struct udev_rules *rules, struct token *token, const char *val)
1883 char *key_value = &rules->buf[token->key.value_off];
1890 switch (token->key.glob) {
1892 match = (streq(key_value, val));
1895 match = (fnmatch(key_value, val, 0) == 0);
1902 s = &rules->buf[token->key.value_off];
1907 next = strchr(s, '|');
1909 size_t matchlen = (size_t)(next - s);
1911 match = (matchlen == len && strncmp(s, val, matchlen) == 0);
1915 match = (streq(s, val));
1924 char value[UTIL_PATH_SIZE];
1926 util_strscpy(value, sizeof(value), &rules->buf[token->key.value_off]);
1928 while (key_value != NULL) {
1929 pos = strchr(key_value, '|');
1934 match = (fnmatch(key_value, val, 0) == 0);
1942 match = (val[0] != '\0');
1948 if (match && (token->key.op == OP_MATCH))
1950 if (!match && (token->key.op == OP_NOMATCH))
1955 static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur)
1958 char nbuf[UTIL_NAME_SIZE];
1960 char vbuf[UTIL_NAME_SIZE];
1963 name = &rules->buf[cur->key.attr_off];
1964 switch (cur->key.attrsubst) {
1966 udev_event_apply_format(event, name, nbuf, sizeof(nbuf));
1970 value = udev_device_get_sysattr_value(dev, name);
1975 if (util_resolve_subsys_kernel(event->udev, name, vbuf, sizeof(vbuf), 1) != 0)
1983 /* remove trailing whitespace, if not asked to match for it */
1984 len = strlen(value);
1985 if (len > 0 && isspace(value[len-1])) {
1986 const char *key_value;
1989 key_value = &rules->buf[cur->key.value_off];
1990 klen = strlen(key_value);
1991 if (klen > 0 && !isspace(key_value[klen-1])) {
1992 if (value != vbuf) {
1993 util_strscpy(vbuf, sizeof(vbuf), value);
1996 while (len > 0 && isspace(vbuf[--len]))
2001 return match_key(rules, cur, value);
2010 int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event, const sigset_t *sigmask)
2014 enum escape_type esc = ESCAPE_UNSET;
2017 if (rules->tokens == NULL)
2020 can_set_name = ((!streq(udev_device_get_action(event->dev), "remove")) &&
2021 (major(udev_device_get_devnum(event->dev)) > 0 ||
2022 udev_device_get_ifindex(event->dev) > 0));
2024 /* loop through token list, match, run actions or forward to next rule */
2025 cur = &rules->tokens[0];
2028 dump_token(rules, cur);
2029 switch (cur->type) {
2033 /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
2034 if (!can_set_name && rule->rule.can_set_name)
2039 if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
2043 if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
2047 if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
2050 case TK_M_DEVLINK: {
2051 struct udev_list_entry *list_entry;
2054 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
2055 const char *devlink;
2057 devlink = udev_list_entry_get_name(list_entry) + strlen(TEST_PREFIX "/dev/");
2058 if (match_key(rules, cur, devlink) == 0) {
2068 if (match_key(rules, cur, event->name) != 0)
2072 const char *key_name = &rules->buf[cur->key.attr_off];
2075 value = udev_device_get_property_value(event->dev, key_name);
2078 if (match_key(rules, cur, value))
2083 struct udev_list_entry *list_entry;
2086 udev_list_entry_foreach(list_entry, udev_device_get_tags_list_entry(event->dev)) {
2087 if (streq(&rules->buf[cur->key.value_off], udev_list_entry_get_name(list_entry))) {
2092 if (!match && (cur->key.op != OP_NOMATCH))
2096 case TK_M_SUBSYSTEM:
2097 if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
2101 if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
2104 case TK_M_WAITFOR: {
2105 char filename[UTIL_PATH_SIZE];
2108 udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename));
2109 found = (wait_for_file(event->dev, filename, 10) == 0);
2110 if (!found && (cur->key.op != OP_NOMATCH))
2115 if (match_attr(rules, event->dev, event, cur) != 0)
2119 case TK_M_SUBSYSTEMS:
2125 /* get whole sequence of parent matches */
2127 while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX)
2130 /* loop over parents */
2131 event->dev_parent = event->dev;
2135 /* loop over sequence of parent match keys */
2136 for (key = cur; key < next; key++ ) {
2137 dump_token(rules, key);
2140 if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
2143 case TK_M_SUBSYSTEMS:
2144 if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
2148 if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
2152 if (match_attr(rules, event->dev_parent, event, key) != 0)
2156 bool match = udev_device_has_tag(event->dev_parent, &rules->buf[cur->key.value_off]);
2158 if (match && key->key.op == OP_NOMATCH)
2160 if (!match && key->key.op == OP_MATCH)
2171 event->dev_parent = udev_device_get_parent(event->dev_parent);
2172 if (event->dev_parent == NULL)
2175 /* move behind our sequence of parent match keys */
2180 char filename[UTIL_PATH_SIZE];
2181 struct stat statbuf;
2184 udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename));
2185 if (util_resolve_subsys_kernel(event->udev, filename, filename, sizeof(filename), 0) != 0) {
2186 if (filename[0] != '/') {
2187 char tmp[UTIL_PATH_SIZE];
2189 util_strscpy(tmp, sizeof(tmp), filename);
2190 util_strscpyl(filename, sizeof(filename),
2191 udev_device_get_syspath(event->dev), "/", tmp, NULL);
2194 attr_subst_subdir(filename, sizeof(filename));
2196 match = (stat(filename, &statbuf) == 0);
2197 if (match && cur->key.mode > 0)
2198 match = ((statbuf.st_mode & cur->key.mode) > 0);
2199 if (match && cur->key.op == OP_NOMATCH)
2201 if (!match && cur->key.op == OP_MATCH)
2205 case TK_M_EVENT_TIMEOUT:
2206 log_debug("OPTIONS event_timeout=%u\n", cur->key.event_timeout);
2207 event->timeout_usec = cur->key.event_timeout * 1000 * 1000;
2209 case TK_M_PROGRAM: {
2210 char program[UTIL_PATH_SIZE];
2212 char result[UTIL_PATH_SIZE];
2214 free(event->program_result);
2215 event->program_result = NULL;
2216 udev_event_apply_format(event, &rules->buf[cur->key.value_off], program, sizeof(program));
2217 envp = udev_device_get_properties_envp(event->dev);
2218 log_debug("PROGRAM '%s' %s:%u\n",
2220 &rules->buf[rule->rule.filename_off],
2221 rule->rule.filename_line);
2223 if (udev_event_spawn(event, program, envp, sigmask, result, sizeof(result)) < 0) {
2224 if (cur->key.op != OP_NOMATCH)
2229 util_remove_trailing_chars(result, '\n');
2230 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2231 count = util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
2233 log_debug("%i character(s) replaced\n" , count);
2235 event->program_result = strdup(result);
2236 if (cur->key.op == OP_NOMATCH)
2241 case TK_M_IMPORT_FILE: {
2242 char import[UTIL_PATH_SIZE];
2244 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2245 if (import_file_into_properties(event->dev, import) != 0)
2246 if (cur->key.op != OP_NOMATCH)
2250 case TK_M_IMPORT_PROG: {
2251 char import[UTIL_PATH_SIZE];
2253 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2254 log_debug("IMPORT '%s' %s:%u\n",
2256 &rules->buf[rule->rule.filename_off],
2257 rule->rule.filename_line);
2259 if (import_program_into_properties(event, import, sigmask) != 0)
2260 if (cur->key.op != OP_NOMATCH)
2264 case TK_M_IMPORT_BUILTIN: {
2265 char command[UTIL_PATH_SIZE];
2267 if (udev_builtin_run_once(cur->key.builtin_cmd)) {
2268 /* check if we ran already */
2269 if (event->builtin_run & (1 << cur->key.builtin_cmd)) {
2270 log_debug("IMPORT builtin skip '%s' %s:%u\n",
2271 udev_builtin_name(cur->key.builtin_cmd),
2272 &rules->buf[rule->rule.filename_off],
2273 rule->rule.filename_line);
2274 /* return the result from earlier run */
2275 if (event->builtin_ret & (1 << cur->key.builtin_cmd))
2276 if (cur->key.op != OP_NOMATCH)
2281 event->builtin_run |= (1 << cur->key.builtin_cmd);
2284 udev_event_apply_format(event, &rules->buf[cur->key.value_off], command, sizeof(command));
2285 log_debug("IMPORT builtin '%s' %s:%u\n",
2286 udev_builtin_name(cur->key.builtin_cmd),
2287 &rules->buf[rule->rule.filename_off],
2288 rule->rule.filename_line);
2290 if (udev_builtin_run(event->dev, cur->key.builtin_cmd, command, false) != 0) {
2291 /* remember failure */
2292 log_debug("IMPORT builtin '%s' returned non-zero\n",
2293 udev_builtin_name(cur->key.builtin_cmd));
2294 event->builtin_ret |= (1 << cur->key.builtin_cmd);
2295 if (cur->key.op != OP_NOMATCH)
2300 case TK_M_IMPORT_DB: {
2301 const char *key = &rules->buf[cur->key.value_off];
2304 value = udev_device_get_property_value(event->dev_db, key);
2305 if (value != NULL) {
2306 struct udev_list_entry *entry;
2308 entry = udev_device_add_property(event->dev, key, value);
2309 udev_list_entry_set_num(entry, true);
2311 if (cur->key.op != OP_NOMATCH)
2316 case TK_M_IMPORT_CMDLINE: {
2318 bool imported = false;
2320 f = fopen("/proc/cmdline", "r");
2324 if (fgets(cmdline, sizeof(cmdline), f) != NULL) {
2325 const char *key = &rules->buf[cur->key.value_off];
2328 pos = strstr(cmdline, key);
2330 struct udev_list_entry *entry;
2333 if (pos[0] == '\0' || isspace(pos[0])) {
2334 /* we import simple flags as 'FLAG=1' */
2335 entry = udev_device_add_property(event->dev, key, "1");
2336 udev_list_entry_set_num(entry, true);
2338 } else if (pos[0] == '=') {
2343 while (pos[0] != '\0' && !isspace(pos[0]))
2346 entry = udev_device_add_property(event->dev, key, value);
2347 udev_list_entry_set_num(entry, true);
2354 if (!imported && cur->key.op != OP_NOMATCH)
2358 case TK_M_IMPORT_PARENT: {
2359 char import[UTIL_PATH_SIZE];
2361 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2362 if (import_parent_into_properties(event->dev, import) != 0)
2363 if (cur->key.op != OP_NOMATCH)
2368 if (match_key(rules, cur, event->program_result) != 0)
2371 case TK_A_STRING_ESCAPE_NONE:
2374 case TK_A_STRING_ESCAPE_REPLACE:
2375 esc = ESCAPE_REPLACE;
2377 case TK_A_DB_PERSIST:
2378 udev_device_set_db_persist(event->dev);
2380 case TK_A_INOTIFY_WATCH:
2381 if (event->inotify_watch_final)
2383 if (cur->key.op == OP_ASSIGN_FINAL)
2384 event->inotify_watch_final = true;
2385 event->inotify_watch = cur->key.watch;
2387 case TK_A_DEVLINK_PRIO:
2388 udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
2391 char owner[UTIL_NAME_SIZE];
2393 if (event->owner_final)
2395 if (cur->key.op == OP_ASSIGN_FINAL)
2396 event->owner_final = true;
2397 udev_event_apply_format(event, &rules->buf[cur->key.value_off], owner, sizeof(owner));
2398 event->uid = util_lookup_user(event->udev, owner);
2399 log_debug("OWNER %u %s:%u\n",
2401 &rules->buf[rule->rule.filename_off],
2402 rule->rule.filename_line);
2406 char group[UTIL_NAME_SIZE];
2408 if (event->group_final)
2410 if (cur->key.op == OP_ASSIGN_FINAL)
2411 event->group_final = true;
2412 udev_event_apply_format(event, &rules->buf[cur->key.value_off], group, sizeof(group));
2413 event->gid = util_lookup_group(event->udev, group);
2414 log_debug("GROUP %u %s:%u\n",
2416 &rules->buf[rule->rule.filename_off],
2417 rule->rule.filename_line);
2421 char mode_str[UTIL_NAME_SIZE];
2425 if (event->mode_final)
2427 udev_event_apply_format(event, &rules->buf[cur->key.value_off], mode_str, sizeof(mode_str));
2428 mode = strtol(mode_str, &endptr, 8);
2429 if (endptr[0] != '\0') {
2430 log_error("ignoring invalid mode '%s'\n", mode_str);
2433 if (cur->key.op == OP_ASSIGN_FINAL)
2434 event->mode_final = true;
2435 event->mode_set = true;
2437 log_debug("MODE %#o %s:%u\n",
2439 &rules->buf[rule->rule.filename_off],
2440 rule->rule.filename_line);
2444 if (event->owner_final)
2446 if (cur->key.op == OP_ASSIGN_FINAL)
2447 event->owner_final = true;
2448 event->uid = cur->key.uid;
2449 log_debug("OWNER %u %s:%u\n",
2451 &rules->buf[rule->rule.filename_off],
2452 rule->rule.filename_line);
2455 if (event->group_final)
2457 if (cur->key.op == OP_ASSIGN_FINAL)
2458 event->group_final = true;
2459 event->gid = cur->key.gid;
2460 log_debug("GROUP %u %s:%u\n",
2462 &rules->buf[rule->rule.filename_off],
2463 rule->rule.filename_line);
2466 if (event->mode_final)
2468 if (cur->key.op == OP_ASSIGN_FINAL)
2469 event->mode_final = true;
2470 event->mode_set = true;
2471 event->mode = cur->key.mode;
2472 log_debug("MODE %#o %s:%u\n",
2474 &rules->buf[rule->rule.filename_off],
2475 rule->rule.filename_line);
2478 const char *name = &rules->buf[cur->key.attr_off];
2479 char *value = &rules->buf[cur->key.value_off];
2481 if (value[0] != '\0') {
2482 char temp_value[UTIL_NAME_SIZE];
2483 struct udev_list_entry *entry;
2485 udev_event_apply_format(event, value, temp_value, sizeof(temp_value));
2486 entry = udev_device_add_property(event->dev, name, temp_value);
2487 /* store in db, skip private keys */
2489 udev_list_entry_set_num(entry, true);
2491 udev_device_add_property(event->dev, name, NULL);
2496 char tag[UTIL_PATH_SIZE];
2499 udev_event_apply_format(event, &rules->buf[cur->key.value_off], tag, sizeof(tag));
2500 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2501 udev_device_cleanup_tags_list(event->dev);
2502 for (p = tag; *p != '\0'; p++) {
2503 if ((*p >= 'a' && *p <= 'z') ||
2504 (*p >= 'A' && *p <= 'Z') ||
2505 (*p >= '0' && *p <= '9') ||
2506 *p == '-' || *p == '_')
2508 log_error("ignoring invalid tag name '%s'\n", tag);
2511 udev_device_add_tag(event->dev, tag);
2515 const char *name = &rules->buf[cur->key.value_off];
2517 char name_str[UTIL_PATH_SIZE];
2520 if (event->name_final)
2522 if (cur->key.op == OP_ASSIGN_FINAL)
2523 event->name_final = true;
2524 udev_event_apply_format(event, name, name_str, sizeof(name_str));
2525 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2526 count = util_replace_chars(name_str, "/");
2528 log_debug("%i character(s) replaced\n", count);
2530 if (major(udev_device_get_devnum(event->dev)) &&
2531 (!streq(name_str, udev_device_get_devnode(event->dev) + strlen(TEST_PREFIX "/dev/")))) {
2532 log_error("NAME=\"%s\" ignored, kernel device nodes "
2533 "can not be renamed; please fix it in %s:%u\n", name,
2534 &rules->buf[rule->rule.filename_off], rule->rule.filename_line);
2538 event->name = strdup(name_str);
2539 log_debug("NAME '%s' %s:%u\n",
2541 &rules->buf[rule->rule.filename_off],
2542 rule->rule.filename_line);
2545 case TK_A_DEVLINK: {
2546 char temp[UTIL_PATH_SIZE];
2547 char filename[UTIL_PATH_SIZE];
2551 if (event->devlink_final)
2553 if (major(udev_device_get_devnum(event->dev)) == 0)
2555 if (cur->key.op == OP_ASSIGN_FINAL)
2556 event->devlink_final = true;
2557 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2558 udev_device_cleanup_devlinks_list(event->dev);
2560 /* allow multiple symlinks separated by spaces */
2561 udev_event_apply_format(event, &rules->buf[cur->key.value_off], temp, sizeof(temp));
2562 if (esc == ESCAPE_UNSET)
2563 count = util_replace_chars(temp, "/ ");
2564 else if (esc == ESCAPE_REPLACE)
2565 count = util_replace_chars(temp, "/");
2567 log_debug("%i character(s) replaced\n" , count);
2569 while (isspace(pos[0]))
2571 next = strchr(pos, ' ');
2572 while (next != NULL) {
2574 log_debug("LINK '%s' %s:%u\n", pos,
2575 &rules->buf[rule->rule.filename_off], rule->rule.filename_line);
2576 util_strscpyl(filename, sizeof(filename), TEST_PREFIX "/dev/", pos, NULL);
2577 udev_device_add_devlink(event->dev, filename, cur->key.devlink_unique);
2578 while (isspace(next[1]))
2581 next = strchr(pos, ' ');
2583 if (pos[0] != '\0') {
2584 log_debug("LINK '%s' %s:%u\n", pos,
2585 &rules->buf[rule->rule.filename_off], rule->rule.filename_line);
2586 util_strscpyl(filename, sizeof(filename), TEST_PREFIX "/dev/", pos, NULL);
2587 udev_device_add_devlink(event->dev, filename, cur->key.devlink_unique);
2592 const char *key_name = &rules->buf[cur->key.attr_off];
2593 char attr[UTIL_PATH_SIZE];
2594 char value[UTIL_NAME_SIZE];
2597 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0)
2598 util_strscpyl(attr, sizeof(attr), udev_device_get_syspath(event->dev), "/", key_name, NULL);
2599 attr_subst_subdir(attr, sizeof(attr));
2601 udev_event_apply_format(event, &rules->buf[cur->key.value_off], value, sizeof(value));
2602 log_debug("ATTR '%s' writing '%s' %s:%u\n", attr, value,
2603 &rules->buf[rule->rule.filename_off],
2604 rule->rule.filename_line);
2605 f = fopen(attr, "w");
2607 if (fprintf(f, "%s", value) <= 0)
2608 log_error("error writing ATTR{%s}: %m\n", attr);
2611 log_error("error opening ATTR{%s} for writing: %m\n", attr);
2615 case TK_A_RUN_BUILTIN:
2616 case TK_A_RUN_PROGRAM: {
2617 struct udev_list_entry *entry;
2619 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2620 udev_list_cleanup(&event->run_list);
2621 log_debug("RUN '%s' %s:%u\n",
2622 &rules->buf[cur->key.value_off],
2623 &rules->buf[rule->rule.filename_off],
2624 rule->rule.filename_line);
2625 entry = udev_list_entry_add(&event->run_list, &rules->buf[cur->key.value_off], NULL);
2626 udev_list_entry_set_num(entry, cur->key.builtin_cmd);
2630 if (cur->key.rule_goto == 0)
2632 cur = &rules->tokens[cur->key.rule_goto];
2637 case TK_M_PARENTS_MIN:
2638 case TK_M_PARENTS_MAX:
2641 log_error("wrong type %u\n", cur->type);
2648 /* fast-forward to next rule */
2649 cur = rule + rule->rule.token_count;
2653 void udev_rules_apply_static_dev_perms(struct udev_rules *rules)
2661 if (rules->tokens == NULL)
2664 cur = &rules->tokens[0];
2667 switch (cur->type) {
2672 /* skip rules without a static_node tag */
2673 if (!rule->rule.has_static_node)
2687 mode = cur->key.mode;
2689 case TK_A_STATIC_NODE: {
2690 char filename[UTIL_PATH_SIZE];
2693 /* we assure, that the permissions tokens are sorted before the static token */
2694 if (mode == 0 && uid == 0 && gid == 0)
2696 util_strscpyl(filename, sizeof(filename), TEST_PREFIX "/dev/",
2697 &rules->buf[cur->key.value_off], NULL);
2698 if (stat(filename, &stats) != 0)
2700 if (!S_ISBLK(stats.st_mode) && !S_ISCHR(stats.st_mode))
2708 if (mode != (stats.st_mode & 01777)) {
2709 chmod(filename, mode);
2710 log_debug("chmod '%s' %#o\n", filename, mode);
2713 if ((uid != 0 && uid != stats.st_uid) || (gid != 0 && gid != stats.st_gid)) {
2714 chown(filename, uid, gid);
2715 log_debug("chown '%s' %u %u\n", filename, uid, gid);
2718 utimensat(AT_FDCWD, filename, NULL, 0);
2728 /* fast-forward to next rule */
2729 cur = rule + rule->rule.token_count;