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/>.
34 #include "path-util.h"
35 #include "conf-files.h"
37 #define PREALLOC_TOKEN 2048
38 #define PREALLOC_STRBUF 32 * 1024
39 #define PREALLOC_TRIE 256
42 unsigned int name_off;
50 /* this node's first child */
51 unsigned int child_idx;
52 /* the next child of our parent node's child list */
53 unsigned int next_child_idx;
54 /* this node's last child (shortcut for append) */
55 unsigned int last_child_idx;
56 unsigned int value_off;
57 unsigned short value_len;
64 unsigned long long *dirs_ts_usec;
67 /* every key in the rules file becomes a token */
69 unsigned int token_cur;
70 unsigned int token_max;
72 /* all key strings are copied to a single string buffer */
76 unsigned int buf_count;
78 /* during rule parsing, strings are indexed and de-duplicated */
79 struct trie_node *trie_nodes;
80 unsigned int trie_nodes_cur;
81 unsigned int trie_nodes_max;
83 /* during rule parsing, uid/gid lookup results are cached */
85 unsigned int uids_cur;
86 unsigned int uids_max;
88 unsigned int gids_cur;
89 unsigned int gids_max;
92 /* KEY=="", KEY!="", KEY+="", KEY="", KEY:="" */
105 enum string_glob_type {
107 GL_PLAIN, /* no special chars */
108 GL_GLOB, /* shell globs ?,*,[] */
109 GL_SPLIT, /* multi-value A|B */
110 GL_SPLIT_GLOB, /* multi-value with glob A*|B* */
111 GL_SOMETHING, /* commonly used "?*" */
114 enum string_subst_type {
121 /* tokens of a rule are sorted/handled in this order */
126 TK_M_ACTION, /* val */
127 TK_M_DEVPATH, /* val */
128 TK_M_KERNEL, /* val */
129 TK_M_DEVLINK, /* val */
131 TK_M_ENV, /* val, attr */
133 TK_M_SUBSYSTEM, /* val */
134 TK_M_DRIVER, /* val */
135 TK_M_WAITFOR, /* val */
136 TK_M_ATTR, /* val, attr */
139 TK_M_KERNELS, /* val */
140 TK_M_SUBSYSTEMS, /* val */
141 TK_M_DRIVERS, /* val */
142 TK_M_ATTRS, /* val, attr */
146 TK_M_TEST, /* val, mode_t */
147 TK_M_EVENT_TIMEOUT, /* int */
148 TK_M_PROGRAM, /* val */
149 TK_M_IMPORT_FILE, /* val */
150 TK_M_IMPORT_PROG, /* val */
151 TK_M_IMPORT_BUILTIN, /* val */
152 TK_M_IMPORT_DB, /* val */
153 TK_M_IMPORT_CMDLINE, /* val */
154 TK_M_IMPORT_PARENT, /* val */
155 TK_M_RESULT, /* val */
158 TK_A_STRING_ESCAPE_NONE,
159 TK_A_STRING_ESCAPE_REPLACE,
161 TK_A_INOTIFY_WATCH, /* int */
162 TK_A_DEVLINK_PRIO, /* int */
163 TK_A_OWNER, /* val */
164 TK_A_GROUP, /* val */
166 TK_A_OWNER_ID, /* uid_t */
167 TK_A_GROUP_ID, /* gid_t */
168 TK_A_MODE_ID, /* mode_t */
169 TK_A_STATIC_NODE, /* val */
170 TK_A_ENV, /* val, attr */
173 TK_A_DEVLINK, /* val */
174 TK_A_ATTR, /* val, attr */
175 TK_A_RUN_BUILTIN, /* val, bool */
176 TK_A_RUN_PROGRAM, /* val, bool */
177 TK_A_GOTO, /* size_t */
182 /* we try to pack stuff in a way that we take only 12 bytes per token */
185 unsigned char type; /* same in rule and key */
187 enum token_type type:8;
189 bool has_static_node:1;
190 unsigned int unused:6;
191 unsigned short token_count;
192 unsigned int label_off;
193 unsigned short filename_off;
194 unsigned short filename_line;
197 enum token_type type:8;
198 enum operation_type op:8;
199 enum string_glob_type glob:8;
200 enum string_subst_type subst:4;
201 enum string_subst_type attrsubst:4;
202 unsigned int value_off;
204 unsigned int attr_off;
206 unsigned int rule_goto;
213 enum udev_builtin_cmd builtin_cmd;
221 struct udev_rules *rules;
223 struct token token[MAX_TK];
224 unsigned int token_cur;
228 static const char *operation_str(enum operation_type type)
230 static const char *operation_strs[] = {
231 [OP_UNSET] = "UNSET",
232 [OP_MATCH] = "match",
233 [OP_NOMATCH] = "nomatch",
234 [OP_MATCH_MAX] = "MATCH_MAX",
237 [OP_ASSIGN] = "assign",
238 [OP_ASSIGN_FINAL] = "assign-final",
241 return operation_strs[type];
244 static const char *string_glob_str(enum string_glob_type type)
246 static const char *string_glob_strs[] = {
247 [GL_UNSET] = "UNSET",
248 [GL_PLAIN] = "plain",
250 [GL_SPLIT] = "split",
251 [GL_SPLIT_GLOB] = "split-glob",
252 [GL_SOMETHING] = "split-glob",
255 return string_glob_strs[type];
258 static const char *token_str(enum token_type type)
260 static const char *token_strs[] = {
261 [TK_UNSET] = "UNSET",
264 [TK_M_ACTION] = "M ACTION",
265 [TK_M_DEVPATH] = "M DEVPATH",
266 [TK_M_KERNEL] = "M KERNEL",
267 [TK_M_DEVLINK] = "M DEVLINK",
268 [TK_M_NAME] = "M NAME",
269 [TK_M_ENV] = "M ENV",
270 [TK_M_TAG] = "M TAG",
271 [TK_M_SUBSYSTEM] = "M SUBSYSTEM",
272 [TK_M_DRIVER] = "M DRIVER",
273 [TK_M_WAITFOR] = "M WAITFOR",
274 [TK_M_ATTR] = "M ATTR",
276 [TK_M_PARENTS_MIN] = "M PARENTS_MIN",
277 [TK_M_KERNELS] = "M KERNELS",
278 [TK_M_SUBSYSTEMS] = "M SUBSYSTEMS",
279 [TK_M_DRIVERS] = "M DRIVERS",
280 [TK_M_ATTRS] = "M ATTRS",
281 [TK_M_TAGS] = "M TAGS",
282 [TK_M_PARENTS_MAX] = "M PARENTS_MAX",
284 [TK_M_TEST] = "M TEST",
285 [TK_M_EVENT_TIMEOUT] = "M EVENT_TIMEOUT",
286 [TK_M_PROGRAM] = "M PROGRAM",
287 [TK_M_IMPORT_FILE] = "M IMPORT_FILE",
288 [TK_M_IMPORT_PROG] = "M IMPORT_PROG",
289 [TK_M_IMPORT_BUILTIN] = "M IMPORT_BUILTIN",
290 [TK_M_IMPORT_DB] = "M IMPORT_DB",
291 [TK_M_IMPORT_CMDLINE] = "M IMPORT_CMDLINE",
292 [TK_M_IMPORT_PARENT] = "M IMPORT_PARENT",
293 [TK_M_RESULT] = "M RESULT",
294 [TK_M_MAX] = "M MAX",
296 [TK_A_STRING_ESCAPE_NONE] = "A STRING_ESCAPE_NONE",
297 [TK_A_STRING_ESCAPE_REPLACE] = "A STRING_ESCAPE_REPLACE",
298 [TK_A_DB_PERSIST] = "A DB_PERSIST",
299 [TK_A_INOTIFY_WATCH] = "A INOTIFY_WATCH",
300 [TK_A_DEVLINK_PRIO] = "A DEVLINK_PRIO",
301 [TK_A_OWNER] = "A OWNER",
302 [TK_A_GROUP] = "A GROUP",
303 [TK_A_MODE] = "A MODE",
304 [TK_A_OWNER_ID] = "A OWNER_ID",
305 [TK_A_GROUP_ID] = "A GROUP_ID",
306 [TK_A_STATIC_NODE] = "A STATIC_NODE",
307 [TK_A_MODE_ID] = "A MODE_ID",
308 [TK_A_ENV] = "A ENV",
309 [TK_A_TAG] = "A ENV",
310 [TK_A_NAME] = "A NAME",
311 [TK_A_DEVLINK] = "A DEVLINK",
312 [TK_A_ATTR] = "A ATTR",
313 [TK_A_RUN_BUILTIN] = "A RUN_BUILTIN",
314 [TK_A_RUN_PROGRAM] = "A RUN_PROGRAM",
315 [TK_A_GOTO] = "A GOTO",
320 return token_strs[type];
323 static void dump_token(struct udev_rules *rules, struct token *token)
325 enum token_type type = token->type;
326 enum operation_type op = token->key.op;
327 enum string_glob_type glob = token->key.glob;
328 const char *value = &rules->buf[token->key.value_off];
329 const char *attr = &rules->buf[token->key.attr_off];
334 const char *tks_ptr = (char *)rules->tokens;
335 const char *tk_ptr = (char *)token;
336 unsigned int idx = (tk_ptr - tks_ptr) / sizeof(struct token);
338 log_debug("* RULE %s:%u, token: %u, count: %u, label: '%s'\n",
339 &rules->buf[token->rule.filename_off], token->rule.filename_line,
340 idx, token->rule.token_count,
341 &rules->buf[token->rule.label_off]);
353 case TK_M_SUBSYSTEMS:
357 case TK_M_IMPORT_FILE:
358 case TK_M_IMPORT_PROG:
360 case TK_M_IMPORT_CMDLINE:
361 case TK_M_IMPORT_PARENT:
368 case TK_A_RUN_BUILTIN:
369 case TK_A_RUN_PROGRAM:
370 log_debug("%s %s '%s'(%s)\n",
371 token_str(type), operation_str(op), value, string_glob_str(glob));
373 case TK_M_IMPORT_BUILTIN:
374 log_debug("%s %i '%s'\n", token_str(type), token->key.builtin_cmd, value);
381 log_debug("%s %s '%s' '%s'(%s)\n",
382 token_str(type), operation_str(op), attr, value, string_glob_str(glob));
386 log_debug("%s %s '%s'\n", token_str(type), operation_str(op), value);
388 case TK_A_STRING_ESCAPE_NONE:
389 case TK_A_STRING_ESCAPE_REPLACE:
390 case TK_A_DB_PERSIST:
391 log_debug("%s\n", token_str(type));
394 log_debug("%s %s '%s'(%s) %#o\n",
395 token_str(type), operation_str(op), value, string_glob_str(glob), token->key.mode);
397 case TK_A_INOTIFY_WATCH:
398 log_debug("%s %u\n", token_str(type), token->key.watch);
400 case TK_A_DEVLINK_PRIO:
401 log_debug("%s %u\n", token_str(type), token->key.devlink_prio);
404 log_debug("%s %s %u\n", token_str(type), operation_str(op), token->key.uid);
407 log_debug("%s %s %u\n", token_str(type), operation_str(op), token->key.gid);
410 log_debug("%s %s %#o\n", token_str(type), operation_str(op), token->key.mode);
412 case TK_A_STATIC_NODE:
413 log_debug("%s '%s'\n", token_str(type), value);
415 case TK_M_EVENT_TIMEOUT:
416 log_debug("%s %u\n", token_str(type), token->key.event_timeout);
419 log_debug("%s '%s' %u\n", token_str(type), value, token->key.rule_goto);
422 log_debug("* %s\n", token_str(type));
424 case TK_M_PARENTS_MIN:
425 case TK_M_PARENTS_MAX:
428 log_debug("unknown type %u\n", type);
433 static void dump_rules(struct udev_rules *rules)
437 log_debug("dumping %u (%zu bytes) tokens, %u (%zu bytes) strings\n",
439 rules->token_cur * sizeof(struct token),
442 for(i = 0; i < rules->token_cur; i++)
443 dump_token(rules, &rules->tokens[i]);
446 static inline const char *operation_str(enum operation_type type) { return NULL; }
447 static inline const char *token_str(enum token_type type) { return NULL; }
448 static inline void dump_token(struct udev_rules *rules, struct token *token) {}
449 static inline void dump_rules(struct udev_rules *rules) {}
452 static int add_new_string(struct udev_rules *rules, const char *str, size_t bytes)
456 /* grow buffer if needed */
457 if (rules->buf_cur + bytes+1 >= rules->buf_max) {
461 /* double the buffer size */
462 add = rules->buf_max;
466 buf = realloc(rules->buf, rules->buf_max + add);
470 rules->buf_max += add;
472 off = rules->buf_cur;
473 memcpy(&rules->buf[rules->buf_cur], str, bytes);
474 rules->buf_cur += bytes;
479 static int add_string(struct udev_rules *rules, const char *str)
481 unsigned int node_idx;
482 struct trie_node *new_node;
483 unsigned int new_node_idx;
488 struct trie_node *parent;
490 /* walk trie, start from last character of str to find matching tails */
494 for (depth = 0; depth <= len; depth++) {
495 struct trie_node *node;
496 unsigned int child_idx;
498 node = &rules->trie_nodes[node_idx];
499 off = node->value_off + node->value_len - len;
501 /* match against current node */
502 if (depth == len || (node->value_len >= len && memcmp(&rules->buf[off], str, len) == 0))
505 /* lookup child node */
506 key = str[len - 1 - depth];
507 child_idx = node->child_idx;
508 while (child_idx > 0) {
509 struct trie_node *child;
511 child = &rules->trie_nodes[child_idx];
512 if (child->key == key)
514 child_idx = child->next_child_idx;
518 node_idx = child_idx;
521 /* string not found, add it */
522 off = add_new_string(rules, str, len + 1);
524 /* grow trie nodes if needed */
525 if (rules->trie_nodes_cur >= rules->trie_nodes_max) {
526 struct trie_node *nodes;
529 /* double the buffer size */
530 add = rules->trie_nodes_max;
534 nodes = realloc(rules->trie_nodes, (rules->trie_nodes_max + add) * sizeof(struct trie_node));
537 rules->trie_nodes = nodes;
538 rules->trie_nodes_max += add;
542 new_node_idx = rules->trie_nodes_cur;
543 rules->trie_nodes_cur++;
544 new_node = &rules->trie_nodes[new_node_idx];
545 memset(new_node, 0x00, sizeof(struct trie_node));
546 new_node->value_off = off;
547 new_node->value_len = len;
550 /* join the parent's child list */
551 parent = &rules->trie_nodes[node_idx];
552 if (parent->child_idx == 0) {
553 parent->child_idx = new_node_idx;
555 struct trie_node *last_child;
557 last_child = &rules->trie_nodes[parent->last_child_idx];
558 last_child->next_child_idx = new_node_idx;
560 parent->last_child_idx = new_node_idx;
564 static int add_token(struct udev_rules *rules, struct token *token)
566 /* grow buffer if needed */
567 if (rules->token_cur+1 >= rules->token_max) {
568 struct token *tokens;
571 /* double the buffer size */
572 add = rules->token_max;
576 tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
579 rules->tokens = tokens;
580 rules->token_max += add;
582 memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
587 static uid_t add_uid(struct udev_rules *rules, const char *owner)
593 /* lookup, if we know it already */
594 for (i = 0; i < rules->uids_cur; i++) {
595 off = rules->uids[i].name_off;
596 if (streq(&rules->buf[off], owner)) {
597 uid = rules->uids[i].uid;
601 uid = util_lookup_user(rules->udev, owner);
603 /* grow buffer if needed */
604 if (rules->uids_cur+1 >= rules->uids_max) {
605 struct uid_gid *uids;
608 /* double the buffer size */
609 add = rules->uids_max;
613 uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
617 rules->uids_max += add;
619 rules->uids[rules->uids_cur].uid = uid;
620 off = add_string(rules, owner);
623 rules->uids[rules->uids_cur].name_off = off;
628 static gid_t add_gid(struct udev_rules *rules, const char *group)
634 /* lookup, if we know it already */
635 for (i = 0; i < rules->gids_cur; i++) {
636 off = rules->gids[i].name_off;
637 if (streq(&rules->buf[off], group)) {
638 gid = rules->gids[i].gid;
642 gid = util_lookup_group(rules->udev, group);
644 /* grow buffer if needed */
645 if (rules->gids_cur+1 >= rules->gids_max) {
646 struct uid_gid *gids;
649 /* double the buffer size */
650 add = rules->gids_max;
654 gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid));
658 rules->gids_max += add;
660 rules->gids[rules->gids_cur].gid = gid;
661 off = add_string(rules, group);
664 rules->gids[rules->gids_cur].name_off = off;
669 static int import_property_from_string(struct udev_device *dev, char *line)
677 while (isspace(key[0]))
680 /* comment or empty line */
681 if (key[0] == '#' || key[0] == '\0')
684 /* split key/value */
685 val = strchr(key, '=');
692 while (isspace(val[0]))
699 while (isspace(key[len-1]))
703 /* terminate value */
707 while (isspace(val[len-1]))
715 if (val[0] == '"' || val[0] == '\'') {
716 if (val[len-1] != val[0]) {
717 log_debug("inconsistent quoting: '%s', skip\n", line);
724 /* handle device, renamed by external tool, returning new path */
725 if (streq(key, "DEVPATH")) {
726 char syspath[UTIL_PATH_SIZE];
728 log_debug("updating devpath from '%s' to '%s'\n",
729 udev_device_get_devpath(dev), val);
730 util_strscpyl(syspath, sizeof(syspath), "/sys", val, NULL);
731 udev_device_set_syspath(dev, syspath);
733 struct udev_list_entry *entry;
735 entry = udev_device_add_property(dev, key, val);
736 /* store in db, skip private keys */
738 udev_list_entry_set_num(entry, true);
743 static int import_file_into_properties(struct udev_device *dev, const char *filename)
746 char line[UTIL_LINE_SIZE];
748 f = fopen(filename, "re");
751 while (fgets(line, sizeof(line), f) != NULL)
752 import_property_from_string(dev, line);
757 static int import_program_into_properties(struct udev_event *event, const char *program, const sigset_t *sigmask)
759 struct udev_device *dev = event->dev;
761 char result[UTIL_LINE_SIZE];
765 envp = udev_device_get_properties_envp(dev);
766 err = udev_event_spawn(event, program, envp, sigmask, result, sizeof(result));
771 while (line != NULL) {
774 pos = strchr(line, '\n');
779 import_property_from_string(dev, line);
785 static int import_parent_into_properties(struct udev_device *dev, const char *filter)
787 struct udev_device *dev_parent;
788 struct udev_list_entry *list_entry;
790 dev_parent = udev_device_get_parent(dev);
791 if (dev_parent == NULL)
794 udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
795 const char *key = udev_list_entry_get_name(list_entry);
796 const char *val = udev_list_entry_get_value(list_entry);
798 if (fnmatch(filter, key, 0) == 0) {
799 struct udev_list_entry *entry;
801 entry = udev_device_add_property(dev, key, val);
802 /* store in db, skip private keys */
804 udev_list_entry_set_num(entry, true);
810 #define WAIT_LOOP_PER_SECOND 50
811 static int wait_for_file(struct udev_device *dev, const char *file, int timeout)
813 char filepath[UTIL_PATH_SIZE];
814 char devicepath[UTIL_PATH_SIZE];
816 int loop = timeout * WAIT_LOOP_PER_SECOND;
818 /* a relative path is a device attribute */
819 devicepath[0] = '\0';
820 if (file[0] != '/') {
821 util_strscpyl(devicepath, sizeof(devicepath), udev_device_get_syspath(dev), NULL);
822 util_strscpyl(filepath, sizeof(filepath), devicepath, "/", file, NULL);
827 const struct timespec duration = { 0, 1000 * 1000 * 1000 / WAIT_LOOP_PER_SECOND };
830 if (stat(file, &stats) == 0) {
831 log_debug("file '%s' appeared after %i loops\n", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
834 /* make sure, the device did not disappear in the meantime */
835 if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
836 log_debug("device disappeared while waiting for '%s'\n", file);
839 log_debug("wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND);
840 nanosleep(&duration, NULL);
842 log_debug("waiting for '%s' failed\n", file);
846 static int attr_subst_subdir(char *attr, size_t len)
850 if (strstr(attr, "/*/")) {
852 char dirname[UTIL_PATH_SIZE];
856 util_strscpy(dirname, sizeof(dirname), attr);
857 pos = strstr(dirname, "/*/");
862 dir = opendir(dirname);
866 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
869 if (dent->d_name[0] == '.')
871 util_strscpyl(attr, len, dirname, "/", dent->d_name, tail, NULL);
872 if (stat(attr, &stats) == 0) {
884 static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value)
890 if (linepos == NULL || linepos[0] == '\0')
893 /* skip whitespace */
894 while (isspace(linepos[0]) || linepos[0] == ',')
898 if (linepos[0] == '\0')
904 if (linepos[0] == '\0')
906 if (isspace(linepos[0]))
908 if (linepos[0] == '=')
910 if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
911 if (linepos[1] == '=')
915 /* remember end of key */
918 /* skip whitespace after key */
919 while (isspace(linepos[0]))
921 if (linepos[0] == '\0')
924 /* get operation type */
925 if (linepos[0] == '=' && linepos[1] == '=') {
928 } else if (linepos[0] == '!' && linepos[1] == '=') {
931 } else if (linepos[0] == '+' && linepos[1] == '=') {
934 } else if (linepos[0] == '=') {
937 } else if (linepos[0] == ':' && linepos[1] == '=') {
938 *op = OP_ASSIGN_FINAL;
946 /* skip whitespace after operator */
947 while (isspace(linepos[0]))
949 if (linepos[0] == '\0')
953 if (linepos[0] == '"')
960 temp = strchr(linepos, '"');
966 /* move line to next key */
971 /* extract possible KEY{attr} */
972 static const char *get_key_attribute(struct udev *udev, char *str)
977 attr = strchr(str, '{');
980 pos = strchr(attr, '}');
982 log_error("missing closing brace for format\n");
991 static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
992 enum operation_type op,
993 const char *value, const void *data)
995 struct token *token = &rule_tmp->token[rule_tmp->token_cur];
996 const char *attr = NULL;
998 memset(token, 0x00, sizeof(struct token));
1004 case TK_M_SUBSYSTEM:
1010 case TK_M_SUBSYSTEMS:
1014 case TK_M_IMPORT_FILE:
1015 case TK_M_IMPORT_PROG:
1016 case TK_M_IMPORT_DB:
1017 case TK_M_IMPORT_CMDLINE:
1018 case TK_M_IMPORT_PARENT:
1027 token->key.value_off = add_string(rule_tmp->rules, value);
1029 case TK_M_IMPORT_BUILTIN:
1030 token->key.value_off = add_string(rule_tmp->rules, value);
1031 token->key.builtin_cmd = *(enum udev_builtin_cmd *)data;
1039 token->key.value_off = add_string(rule_tmp->rules, value);
1040 token->key.attr_off = add_string(rule_tmp->rules, attr);
1043 token->key.value_off = add_string(rule_tmp->rules, value);
1044 token->key.devlink_unique = *(int *)data;
1047 token->key.value_off = add_string(rule_tmp->rules, value);
1049 token->key.mode = *(mode_t *)data;
1051 case TK_A_STRING_ESCAPE_NONE:
1052 case TK_A_STRING_ESCAPE_REPLACE:
1053 case TK_A_DB_PERSIST:
1055 case TK_A_RUN_BUILTIN:
1056 case TK_A_RUN_PROGRAM:
1057 token->key.builtin_cmd = *(enum udev_builtin_cmd *)data;
1058 token->key.value_off = add_string(rule_tmp->rules, value);
1060 case TK_A_INOTIFY_WATCH:
1061 case TK_A_DEVLINK_PRIO:
1062 token->key.devlink_prio = *(int *)data;
1065 token->key.uid = *(uid_t *)data;
1068 token->key.gid = *(gid_t *)data;
1071 token->key.mode = *(mode_t *)data;
1073 case TK_A_STATIC_NODE:
1074 token->key.value_off = add_string(rule_tmp->rules, value);
1076 case TK_M_EVENT_TIMEOUT:
1077 token->key.event_timeout = *(int *)data;
1080 case TK_M_PARENTS_MIN:
1081 case TK_M_PARENTS_MAX:
1085 log_error("wrong type %u\n", type);
1089 if (value != NULL && type < TK_M_MAX) {
1090 /* check if we need to split or call fnmatch() while matching rules */
1091 enum string_glob_type glob;
1095 has_split = (strchr(value, '|') != NULL);
1096 has_glob = (strchr(value, '*') != NULL || strchr(value, '?') != NULL || strchr(value, '[') != NULL);
1097 if (has_split && has_glob) {
1098 glob = GL_SPLIT_GLOB;
1099 } else if (has_split) {
1101 } else if (has_glob) {
1102 if (streq(value, "?*"))
1103 glob = GL_SOMETHING;
1109 token->key.glob = glob;
1112 if (value != NULL && type > TK_M_MAX) {
1113 /* check if assigned value has substitution chars */
1114 if (value[0] == '[')
1115 token->key.subst = SB_SUBSYS;
1116 else if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
1117 token->key.subst = SB_FORMAT;
1119 token->key.subst = SB_NONE;
1123 /* check if property/attribut name has substitution chars */
1125 token->key.attrsubst = SB_SUBSYS;
1126 else if (strchr(attr, '%') != NULL || strchr(attr, '$') != NULL)
1127 token->key.attrsubst = SB_FORMAT;
1129 token->key.attrsubst = SB_NONE;
1132 token->key.type = type;
1134 rule_tmp->token_cur++;
1135 if (rule_tmp->token_cur >= ELEMENTSOF(rule_tmp->token)) {
1136 log_error("temporary rule array too small\n");
1142 static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp)
1145 unsigned int start = 0;
1146 unsigned int end = rule_tmp->token_cur;
1148 for (i = 0; i < rule_tmp->token_cur; i++) {
1149 enum token_type next_val = TK_UNSET;
1150 unsigned int next_idx = 0;
1153 /* find smallest value */
1154 for (j = start; j < end; j++) {
1155 if (rule_tmp->token[j].type == TK_UNSET)
1157 if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
1158 next_val = rule_tmp->token[j].type;
1163 /* add token and mark done */
1164 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
1166 rule_tmp->token[next_idx].type = TK_UNSET;
1169 if (next_idx == start)
1171 if (next_idx+1 == end)
1177 static int add_rule(struct udev_rules *rules, char *line,
1178 const char *filename, unsigned int filename_off, unsigned int lineno)
1182 struct rule_tmp rule_tmp;
1184 memset(&rule_tmp, 0x00, sizeof(struct rule_tmp));
1185 rule_tmp.rules = rules;
1186 rule_tmp.rule.type = TK_RULE;
1187 /* the offset in the rule is limited to unsigned short */
1188 if (filename_off < USHRT_MAX)
1189 rule_tmp.rule.rule.filename_off = filename_off;
1190 rule_tmp.rule.rule.filename_line = lineno;
1196 enum operation_type op;
1198 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0)
1201 if (streq(key, "ACTION")) {
1202 if (op > OP_MATCH_MAX) {
1203 log_error("invalid ACTION operation\n");
1206 rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL);
1210 if (streq(key, "DEVPATH")) {
1211 if (op > OP_MATCH_MAX) {
1212 log_error("invalid DEVPATH operation\n");
1215 rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
1219 if (streq(key, "KERNEL")) {
1220 if (op > OP_MATCH_MAX) {
1221 log_error("invalid KERNEL operation\n");
1224 rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL);
1228 if (streq(key, "SUBSYSTEM")) {
1229 if (op > OP_MATCH_MAX) {
1230 log_error("invalid SUBSYSTEM operation\n");
1233 /* bus, class, subsystem events should all be the same */
1234 if (streq(value, "subsystem") ||
1235 streq(value, "bus") ||
1236 streq(value, "class")) {
1237 if (streq(value, "bus") || streq(value, "class"))
1238 log_error("'%s' must be specified as 'subsystem' \n"
1239 "please fix it in %s:%u", value, filename, lineno);
1240 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
1242 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
1246 if (streq(key, "DRIVER")) {
1247 if (op > OP_MATCH_MAX) {
1248 log_error("invalid DRIVER operation\n");
1251 rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL);
1255 if (startswith(key, "ATTR{")) {
1256 attr = get_key_attribute(rules->udev, key + sizeof("ATTR")-1);
1258 log_error("error parsing ATTR attribute\n");
1261 if (op < OP_MATCH_MAX) {
1262 rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
1264 rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr);
1269 if (streq(key, "KERNELS")) {
1270 if (op > OP_MATCH_MAX) {
1271 log_error("invalid KERNELS operation\n");
1274 rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1278 if (streq(key, "SUBSYSTEMS")) {
1279 if (op > OP_MATCH_MAX) {
1280 log_error("invalid SUBSYSTEMS operation\n");
1283 rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1287 if (streq(key, "DRIVERS")) {
1288 if (op > OP_MATCH_MAX) {
1289 log_error("invalid DRIVERS operation\n");
1292 rule_add_key(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
1296 if (startswith(key, "ATTRS{")) {
1297 if (op > OP_MATCH_MAX) {
1298 log_error("invalid ATTRS operation\n");
1301 attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
1303 log_error("error parsing ATTRS attribute\n");
1306 if (startswith(attr, "device/"))
1307 log_error("the 'device' link may not be available in a future kernel, "
1308 "please fix it in %s:%u", filename, lineno);
1309 else if (strstr(attr, "../") != NULL)
1310 log_error("do not reference parent sysfs directories directly, "
1311 "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
1312 rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1316 if (streq(key, "TAGS")) {
1317 if (op > OP_MATCH_MAX) {
1318 log_error("invalid TAGS operation\n");
1321 rule_add_key(&rule_tmp, TK_M_TAGS, op, value, NULL);
1325 if (startswith(key, "ENV{")) {
1326 attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1);
1328 log_error("error parsing ENV attribute\n");
1331 if (op < OP_MATCH_MAX) {
1332 if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
1335 static const char *blacklist[] = {
1350 for (i = 0; i < ELEMENTSOF(blacklist); i++) {
1351 if (!streq(attr, blacklist[i]))
1353 log_error("invalid ENV attribute, '%s' can not be set %s:%u\n", attr, filename, lineno);
1356 if (rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
1362 if (streq(key, "TAG")) {
1363 if (op < OP_MATCH_MAX)
1364 rule_add_key(&rule_tmp, TK_M_TAG, op, value, NULL);
1366 rule_add_key(&rule_tmp, TK_A_TAG, op, value, NULL);
1370 if (streq(key, "PROGRAM")) {
1371 rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
1375 if (streq(key, "RESULT")) {
1376 if (op > OP_MATCH_MAX) {
1377 log_error("invalid RESULT operation\n");
1380 rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL);
1384 if (startswith(key, "IMPORT")) {
1385 attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1);
1387 log_error("IMPORT{} type missing, ignoring IMPORT %s:%u\n", filename, lineno);
1390 if (streq(attr, "program")) {
1391 /* find known built-in command */
1392 if (value[0] != '/') {
1393 enum udev_builtin_cmd cmd;
1395 cmd = udev_builtin_lookup(value);
1396 if (cmd < UDEV_BUILTIN_MAX) {
1397 log_debug("IMPORT found builtin '%s', replacing %s:%u\n",
1398 value, filename, lineno);
1399 rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, value, &cmd);
1403 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1404 } else if (streq(attr, "builtin")) {
1405 enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
1407 if (cmd < UDEV_BUILTIN_MAX)
1408 rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, value, &cmd);
1410 log_error("IMPORT{builtin}: '%s' unknown %s:%u\n", value, filename, lineno);
1411 } else if (streq(attr, "file")) {
1412 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1413 } else if (streq(attr, "db")) {
1414 rule_add_key(&rule_tmp, TK_M_IMPORT_DB, op, value, NULL);
1415 } else if (streq(attr, "cmdline")) {
1416 rule_add_key(&rule_tmp, TK_M_IMPORT_CMDLINE, op, value, NULL);
1417 } else if (streq(attr, "parent")) {
1418 rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
1420 log_error("IMPORT{} unknown type, ignoring IMPORT %s:%u\n", filename, lineno);
1424 if (startswith(key, "TEST")) {
1427 if (op > OP_MATCH_MAX) {
1428 log_error("invalid TEST operation\n");
1431 attr = get_key_attribute(rules->udev, key + sizeof("TEST")-1);
1433 mode = strtol(attr, NULL, 8);
1434 rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode);
1436 rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL);
1441 if (startswith(key, "RUN")) {
1442 attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1);
1446 if (streq(attr, "builtin")) {
1447 enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
1449 if (cmd < UDEV_BUILTIN_MAX)
1450 rule_add_key(&rule_tmp, TK_A_RUN_BUILTIN, op, value, &cmd);
1452 log_error("IMPORT{builtin}: '%s' unknown %s:%u\n", value, filename, lineno);
1453 } else if (streq(attr, "program")) {
1454 enum udev_builtin_cmd cmd = UDEV_BUILTIN_MAX;
1456 rule_add_key(&rule_tmp, TK_A_RUN_PROGRAM, op, value, &cmd);
1458 log_error("RUN{} unknown type, ignoring RUN %s:%u\n", filename, lineno);
1464 if (streq(key, "WAIT_FOR") || streq(key, "WAIT_FOR_SYSFS")) {
1465 rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1469 if (streq(key, "LABEL")) {
1470 rule_tmp.rule.rule.label_off = add_string(rules, value);
1474 if (streq(key, "GOTO")) {
1475 rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1479 if (startswith(key, "NAME")) {
1480 if (op < OP_MATCH_MAX) {
1481 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
1483 if (streq(value, "%k")) {
1484 log_error("NAME=\"%%k\" is ignored, because it breaks kernel supplied names, "
1485 "please remove it from %s:%u\n", filename, lineno);
1488 if (value[0] == '\0') {
1489 log_debug("NAME=\"\" is ignored, because udev will not delete any device nodes, "
1490 "please remove it from %s:%u\n", filename, lineno);
1493 rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL);
1495 rule_tmp.rule.rule.can_set_name = true;
1499 if (startswith(key, "SYMLINK")) {
1500 if (op < OP_MATCH_MAX) {
1501 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
1505 attr = get_key_attribute(rules->udev, key + sizeof("SYMLINK")-1);
1506 if (attr != NULL && strstr(attr, "unique") != NULL)
1508 rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, &flag);
1510 rule_tmp.rule.rule.can_set_name = true;
1514 if (streq(key, "OWNER")) {
1518 uid = strtoul(value, &endptr, 10);
1519 if (endptr[0] == '\0') {
1520 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1521 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1522 uid = add_uid(rules, value);
1523 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1524 } else if (rules->resolve_names >= 0) {
1525 rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
1527 rule_tmp.rule.rule.can_set_name = true;
1531 if (streq(key, "GROUP")) {
1535 gid = strtoul(value, &endptr, 10);
1536 if (endptr[0] == '\0') {
1537 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1538 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1539 gid = add_gid(rules, value);
1540 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1541 } else if (rules->resolve_names >= 0) {
1542 rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
1544 rule_tmp.rule.rule.can_set_name = true;
1548 if (streq(key, "MODE")) {
1552 mode = strtol(value, &endptr, 8);
1553 if (endptr[0] == '\0')
1554 rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1556 rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
1557 rule_tmp.rule.rule.can_set_name = true;
1561 if (streq(key, "OPTIONS")) {
1564 pos = strstr(value, "link_priority=");
1566 int prio = atoi(&pos[strlen("link_priority=")]);
1568 rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, op, NULL, &prio);
1571 pos = strstr(value, "event_timeout=");
1573 int tout = atoi(&pos[strlen("event_timeout=")]);
1575 rule_add_key(&rule_tmp, TK_M_EVENT_TIMEOUT, op, NULL, &tout);
1578 pos = strstr(value, "string_escape=");
1580 pos = &pos[strlen("string_escape=")];
1581 if (startswith(pos, "none"))
1582 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, op, NULL, NULL);
1583 else if (startswith(pos, "replace"))
1584 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, op, NULL, NULL);
1587 pos = strstr(value, "db_persist");
1589 rule_add_key(&rule_tmp, TK_A_DB_PERSIST, op, NULL, NULL);
1591 pos = strstr(value, "nowatch");
1595 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &off);
1597 pos = strstr(value, "watch");
1601 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &on);
1605 pos = strstr(value, "static_node=");
1607 rule_add_key(&rule_tmp, TK_A_STATIC_NODE, op, &pos[strlen("static_node=")], NULL);
1608 rule_tmp.rule.rule.has_static_node = true;
1614 log_error("unknown key '%s' in %s:%u\n", key, filename, lineno);
1618 /* add rule token */
1619 rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur;
1620 if (add_token(rules, &rule_tmp.rule) != 0)
1623 /* add tokens to list, sorted by type */
1624 if (sort_token(rules, &rule_tmp) != 0)
1629 log_error("invalid rule '%s:%u'\n", filename, lineno);
1633 static int parse_file(struct udev_rules *rules, const char *filename)
1636 unsigned int first_token;
1637 unsigned int filename_off;
1638 char line[UTIL_LINE_SIZE];
1642 if (null_or_empty_path(filename)) {
1643 log_debug("skip empty file: %s\n", filename);
1646 log_debug("read rules file: %s\n", filename);
1648 f = fopen(filename, "re");
1652 first_token = rules->token_cur;
1653 filename_off = add_string(rules, filename);
1655 while (fgets(line, sizeof(line), f) != NULL) {
1659 /* skip whitespace */
1662 while (isspace(key[0]))
1673 /* continue reading if backslash+newline is found */
1674 while (line[len-2] == '\\') {
1675 if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1677 if (strlen(&line[len-2]) < 2)
1683 if (len+1 >= sizeof(line)) {
1684 log_error("line too long '%s':%u, ignored\n", filename, line_nr);
1687 add_rule(rules, key, filename, filename_off, line_nr);
1691 /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1692 for (i = first_token+1; i < rules->token_cur; i++) {
1693 if (rules->tokens[i].type == TK_A_GOTO) {
1694 char *label = &rules->buf[rules->tokens[i].key.value_off];
1697 for (j = i+1; j < rules->token_cur; j++) {
1698 if (rules->tokens[j].type != TK_RULE)
1700 if (rules->tokens[j].rule.label_off == 0)
1702 if (!streq(label, &rules->buf[rules->tokens[j].rule.label_off]))
1704 rules->tokens[i].key.rule_goto = j;
1707 if (rules->tokens[i].key.rule_goto == 0)
1708 log_error("GOTO '%s' has no matching label in: '%s'\n", label, filename);
1714 struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
1716 struct udev_rules *rules;
1717 struct udev_list file_list;
1718 struct token end_token;
1722 rules = calloc(1, sizeof(struct udev_rules));
1726 rules->resolve_names = resolve_names;
1727 udev_list_init(udev, &file_list, true);
1729 /* init token array and string buffer */
1730 rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
1731 if (rules->tokens == NULL) {
1735 rules->token_max = PREALLOC_TOKEN;
1737 rules->buf = malloc(PREALLOC_STRBUF);
1738 if (rules->buf == NULL) {
1739 free(rules->tokens);
1743 rules->buf_max = PREALLOC_STRBUF;
1744 /* offset 0 is always '\0' */
1745 rules->buf[0] = '\0';
1748 rules->trie_nodes = malloc(PREALLOC_TRIE * sizeof(struct trie_node));
1749 if (rules->trie_nodes == NULL) {
1751 free(rules->tokens);
1755 rules->trie_nodes_max = PREALLOC_TRIE;
1756 /* offset 0 is the trie root, with an empty string */
1757 memset(rules->trie_nodes, 0x00, sizeof(struct trie_node));
1758 rules->trie_nodes_cur = 1;
1760 rules->dirs = strv_new(SYSCONFDIR "/udev/rules.d",
1761 "/run/udev/rules.d",
1762 UDEVLIBEXECDIR "/rules.d",
1765 log_error("failed to build config directory array");
1768 if (!path_strv_canonicalize(rules->dirs)) {
1769 log_error("failed to canonicalize config directories\n");
1772 strv_uniq(rules->dirs);
1773 r = conf_files_list_strv(&files, ".rules", (const char **)rules->dirs);
1775 log_error("failed to enumerate rules files: %s\n", strerror(-r));
1778 rules->dirs_ts_usec = calloc(strv_length(rules->dirs), sizeof(long long));
1781 * The offset value in the rules strct is limited; add all
1782 * rules file names to the beginning of the string buffer.
1784 STRV_FOREACH(f, files)
1785 add_string(rules, *f);
1787 STRV_FOREACH(f, files)
1788 parse_file(rules, *f);
1792 memset(&end_token, 0x00, sizeof(struct token));
1793 end_token.type = TK_END;
1794 add_token(rules, &end_token);
1796 /* shrink allocated token and string buffer */
1797 if (rules->token_cur < rules->token_max) {
1798 struct token *tokens;
1800 tokens = realloc(rules->tokens, rules->token_cur * sizeof(struct token));
1801 if (tokens != NULL || rules->token_cur == 0) {
1802 rules->tokens = tokens;
1803 rules->token_max = rules->token_cur;
1806 if (rules->buf_cur < rules->buf_max) {
1809 buf = realloc(rules->buf, rules->buf_cur);
1810 if (buf != NULL || rules->buf_cur == 0) {
1812 rules->buf_max = rules->buf_cur;
1815 log_debug("rules use %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1816 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1817 log_debug("temporary index used %zu bytes (%u * %zu bytes)\n",
1818 rules->trie_nodes_cur * sizeof(struct trie_node),
1819 rules->trie_nodes_cur, sizeof(struct trie_node));
1822 free(rules->trie_nodes);
1823 rules->trie_nodes = NULL;
1824 rules->trie_nodes_cur = 0;
1825 rules->trie_nodes_max = 0;
1827 /* cleanup uid/gid cache */
1830 rules->uids_cur = 0;
1831 rules->uids_max = 0;
1834 rules->gids_cur = 0;
1835 rules->gids_max = 0;
1841 struct udev_rules *udev_rules_unref(struct udev_rules *rules)
1845 free(rules->tokens);
1847 free(rules->trie_nodes);
1850 strv_free(rules->dirs);
1851 free(rules->dirs_ts_usec);
1856 bool udev_rules_check_timestamp(struct udev_rules *rules)
1859 bool changed = false;
1864 for (i = 0; rules->dirs[i]; i++) {
1867 if (stat(rules->dirs[i], &stats) < 0)
1870 if (rules->dirs_ts_usec[i] == ts_usec(&stats.st_mtim))
1874 if (rules->dirs_ts_usec[i] != 0) {
1875 log_debug("reload - timestamp of '%s' changed\n", rules->dirs[i]);
1879 /* update timestamp */
1880 rules->dirs_ts_usec[i] = ts_usec(&stats.st_mtim);
1886 static int match_key(struct udev_rules *rules, struct token *token, const char *val)
1888 char *key_value = &rules->buf[token->key.value_off];
1895 switch (token->key.glob) {
1897 match = (streq(key_value, val));
1900 match = (fnmatch(key_value, val, 0) == 0);
1907 s = &rules->buf[token->key.value_off];
1912 next = strchr(s, '|');
1914 size_t matchlen = (size_t)(next - s);
1916 match = (matchlen == len && strncmp(s, val, matchlen) == 0);
1920 match = (streq(s, val));
1929 char value[UTIL_PATH_SIZE];
1931 util_strscpy(value, sizeof(value), &rules->buf[token->key.value_off]);
1933 while (key_value != NULL) {
1934 pos = strchr(key_value, '|');
1939 match = (fnmatch(key_value, val, 0) == 0);
1947 match = (val[0] != '\0');
1953 if (match && (token->key.op == OP_MATCH))
1955 if (!match && (token->key.op == OP_NOMATCH))
1960 static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur)
1963 char nbuf[UTIL_NAME_SIZE];
1965 char vbuf[UTIL_NAME_SIZE];
1968 name = &rules->buf[cur->key.attr_off];
1969 switch (cur->key.attrsubst) {
1971 udev_event_apply_format(event, name, nbuf, sizeof(nbuf));
1975 value = udev_device_get_sysattr_value(dev, name);
1980 if (util_resolve_subsys_kernel(event->udev, name, vbuf, sizeof(vbuf), 1) != 0)
1988 /* remove trailing whitespace, if not asked to match for it */
1989 len = strlen(value);
1990 if (len > 0 && isspace(value[len-1])) {
1991 const char *key_value;
1994 key_value = &rules->buf[cur->key.value_off];
1995 klen = strlen(key_value);
1996 if (klen > 0 && !isspace(key_value[klen-1])) {
1997 if (value != vbuf) {
1998 util_strscpy(vbuf, sizeof(vbuf), value);
2001 while (len > 0 && isspace(vbuf[--len]))
2006 return match_key(rules, cur, value);
2015 int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event, const sigset_t *sigmask)
2019 enum escape_type esc = ESCAPE_UNSET;
2022 if (rules->tokens == NULL)
2025 can_set_name = ((!streq(udev_device_get_action(event->dev), "remove")) &&
2026 (major(udev_device_get_devnum(event->dev)) > 0 ||
2027 udev_device_get_ifindex(event->dev) > 0));
2029 /* loop through token list, match, run actions or forward to next rule */
2030 cur = &rules->tokens[0];
2033 dump_token(rules, cur);
2034 switch (cur->type) {
2038 /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
2039 if (!can_set_name && rule->rule.can_set_name)
2044 if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
2048 if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
2052 if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
2055 case TK_M_DEVLINK: {
2056 struct udev_list_entry *list_entry;
2059 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
2060 const char *devlink;
2062 devlink = udev_list_entry_get_name(list_entry) + strlen("/dev/");
2063 if (match_key(rules, cur, devlink) == 0) {
2073 if (match_key(rules, cur, event->name) != 0)
2077 const char *key_name = &rules->buf[cur->key.attr_off];
2080 value = udev_device_get_property_value(event->dev, key_name);
2083 if (match_key(rules, cur, value))
2088 struct udev_list_entry *list_entry;
2091 udev_list_entry_foreach(list_entry, udev_device_get_tags_list_entry(event->dev)) {
2092 if (streq(&rules->buf[cur->key.value_off], udev_list_entry_get_name(list_entry))) {
2097 if (!match && (cur->key.op != OP_NOMATCH))
2101 case TK_M_SUBSYSTEM:
2102 if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
2106 if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
2109 case TK_M_WAITFOR: {
2110 char filename[UTIL_PATH_SIZE];
2113 udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename));
2114 found = (wait_for_file(event->dev, filename, 10) == 0);
2115 if (!found && (cur->key.op != OP_NOMATCH))
2120 if (match_attr(rules, event->dev, event, cur) != 0)
2124 case TK_M_SUBSYSTEMS:
2130 /* get whole sequence of parent matches */
2132 while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX)
2135 /* loop over parents */
2136 event->dev_parent = event->dev;
2140 /* loop over sequence of parent match keys */
2141 for (key = cur; key < next; key++ ) {
2142 dump_token(rules, key);
2145 if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
2148 case TK_M_SUBSYSTEMS:
2149 if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
2153 if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
2157 if (match_attr(rules, event->dev_parent, event, key) != 0)
2161 bool match = udev_device_has_tag(event->dev_parent, &rules->buf[cur->key.value_off]);
2163 if (match && key->key.op == OP_NOMATCH)
2165 if (!match && key->key.op == OP_MATCH)
2176 event->dev_parent = udev_device_get_parent(event->dev_parent);
2177 if (event->dev_parent == NULL)
2180 /* move behind our sequence of parent match keys */
2185 char filename[UTIL_PATH_SIZE];
2186 struct stat statbuf;
2189 udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename));
2190 if (util_resolve_subsys_kernel(event->udev, filename, filename, sizeof(filename), 0) != 0) {
2191 if (filename[0] != '/') {
2192 char tmp[UTIL_PATH_SIZE];
2194 util_strscpy(tmp, sizeof(tmp), filename);
2195 util_strscpyl(filename, sizeof(filename),
2196 udev_device_get_syspath(event->dev), "/", tmp, NULL);
2199 attr_subst_subdir(filename, sizeof(filename));
2201 match = (stat(filename, &statbuf) == 0);
2202 if (match && cur->key.mode > 0)
2203 match = ((statbuf.st_mode & cur->key.mode) > 0);
2204 if (match && cur->key.op == OP_NOMATCH)
2206 if (!match && cur->key.op == OP_MATCH)
2210 case TK_M_EVENT_TIMEOUT:
2211 log_debug("OPTIONS event_timeout=%u\n", cur->key.event_timeout);
2212 event->timeout_usec = cur->key.event_timeout * 1000 * 1000;
2214 case TK_M_PROGRAM: {
2215 char program[UTIL_PATH_SIZE];
2217 char result[UTIL_PATH_SIZE];
2219 free(event->program_result);
2220 event->program_result = NULL;
2221 udev_event_apply_format(event, &rules->buf[cur->key.value_off], program, sizeof(program));
2222 envp = udev_device_get_properties_envp(event->dev);
2223 log_debug("PROGRAM '%s' %s:%u\n",
2225 &rules->buf[rule->rule.filename_off],
2226 rule->rule.filename_line);
2228 if (udev_event_spawn(event, program, envp, sigmask, result, sizeof(result)) < 0) {
2229 if (cur->key.op != OP_NOMATCH)
2234 util_remove_trailing_chars(result, '\n');
2235 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2236 count = util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
2238 log_debug("%i character(s) replaced\n" , count);
2240 event->program_result = strdup(result);
2241 if (cur->key.op == OP_NOMATCH)
2246 case TK_M_IMPORT_FILE: {
2247 char import[UTIL_PATH_SIZE];
2249 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2250 if (import_file_into_properties(event->dev, import) != 0)
2251 if (cur->key.op != OP_NOMATCH)
2255 case TK_M_IMPORT_PROG: {
2256 char import[UTIL_PATH_SIZE];
2258 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2259 log_debug("IMPORT '%s' %s:%u\n",
2261 &rules->buf[rule->rule.filename_off],
2262 rule->rule.filename_line);
2264 if (import_program_into_properties(event, import, sigmask) != 0)
2265 if (cur->key.op != OP_NOMATCH)
2269 case TK_M_IMPORT_BUILTIN: {
2270 char command[UTIL_PATH_SIZE];
2272 if (udev_builtin_run_once(cur->key.builtin_cmd)) {
2273 /* check if we ran already */
2274 if (event->builtin_run & (1 << cur->key.builtin_cmd)) {
2275 log_debug("IMPORT builtin skip '%s' %s:%u\n",
2276 udev_builtin_name(cur->key.builtin_cmd),
2277 &rules->buf[rule->rule.filename_off],
2278 rule->rule.filename_line);
2279 /* return the result from earlier run */
2280 if (event->builtin_ret & (1 << cur->key.builtin_cmd))
2281 if (cur->key.op != OP_NOMATCH)
2286 event->builtin_run |= (1 << cur->key.builtin_cmd);
2289 udev_event_apply_format(event, &rules->buf[cur->key.value_off], command, sizeof(command));
2290 log_debug("IMPORT builtin '%s' %s:%u\n",
2291 udev_builtin_name(cur->key.builtin_cmd),
2292 &rules->buf[rule->rule.filename_off],
2293 rule->rule.filename_line);
2295 if (udev_builtin_run(event->dev, cur->key.builtin_cmd, command, false) != 0) {
2296 /* remember failure */
2297 log_debug("IMPORT builtin '%s' returned non-zero\n",
2298 udev_builtin_name(cur->key.builtin_cmd));
2299 event->builtin_ret |= (1 << cur->key.builtin_cmd);
2300 if (cur->key.op != OP_NOMATCH)
2305 case TK_M_IMPORT_DB: {
2306 const char *key = &rules->buf[cur->key.value_off];
2309 value = udev_device_get_property_value(event->dev_db, key);
2310 if (value != NULL) {
2311 struct udev_list_entry *entry;
2313 entry = udev_device_add_property(event->dev, key, value);
2314 udev_list_entry_set_num(entry, true);
2316 if (cur->key.op != OP_NOMATCH)
2321 case TK_M_IMPORT_CMDLINE: {
2323 bool imported = false;
2325 f = fopen("/proc/cmdline", "re");
2329 if (fgets(cmdline, sizeof(cmdline), f) != NULL) {
2330 const char *key = &rules->buf[cur->key.value_off];
2333 pos = strstr(cmdline, key);
2335 struct udev_list_entry *entry;
2338 if (pos[0] == '\0' || isspace(pos[0])) {
2339 /* we import simple flags as 'FLAG=1' */
2340 entry = udev_device_add_property(event->dev, key, "1");
2341 udev_list_entry_set_num(entry, true);
2343 } else if (pos[0] == '=') {
2348 while (pos[0] != '\0' && !isspace(pos[0]))
2351 entry = udev_device_add_property(event->dev, key, value);
2352 udev_list_entry_set_num(entry, true);
2359 if (!imported && cur->key.op != OP_NOMATCH)
2363 case TK_M_IMPORT_PARENT: {
2364 char import[UTIL_PATH_SIZE];
2366 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2367 if (import_parent_into_properties(event->dev, import) != 0)
2368 if (cur->key.op != OP_NOMATCH)
2373 if (match_key(rules, cur, event->program_result) != 0)
2376 case TK_A_STRING_ESCAPE_NONE:
2379 case TK_A_STRING_ESCAPE_REPLACE:
2380 esc = ESCAPE_REPLACE;
2382 case TK_A_DB_PERSIST:
2383 udev_device_set_db_persist(event->dev);
2385 case TK_A_INOTIFY_WATCH:
2386 if (event->inotify_watch_final)
2388 if (cur->key.op == OP_ASSIGN_FINAL)
2389 event->inotify_watch_final = true;
2390 event->inotify_watch = cur->key.watch;
2392 case TK_A_DEVLINK_PRIO:
2393 udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
2396 char owner[UTIL_NAME_SIZE];
2398 if (event->owner_final)
2400 if (cur->key.op == OP_ASSIGN_FINAL)
2401 event->owner_final = true;
2402 udev_event_apply_format(event, &rules->buf[cur->key.value_off], owner, sizeof(owner));
2403 event->uid = util_lookup_user(event->udev, owner);
2404 log_debug("OWNER %u %s:%u\n",
2406 &rules->buf[rule->rule.filename_off],
2407 rule->rule.filename_line);
2411 char group[UTIL_NAME_SIZE];
2413 if (event->group_final)
2415 if (cur->key.op == OP_ASSIGN_FINAL)
2416 event->group_final = true;
2417 udev_event_apply_format(event, &rules->buf[cur->key.value_off], group, sizeof(group));
2418 event->gid = util_lookup_group(event->udev, group);
2419 log_debug("GROUP %u %s:%u\n",
2421 &rules->buf[rule->rule.filename_off],
2422 rule->rule.filename_line);
2426 char mode_str[UTIL_NAME_SIZE];
2430 if (event->mode_final)
2432 udev_event_apply_format(event, &rules->buf[cur->key.value_off], mode_str, sizeof(mode_str));
2433 mode = strtol(mode_str, &endptr, 8);
2434 if (endptr[0] != '\0') {
2435 log_error("ignoring invalid mode '%s'\n", mode_str);
2438 if (cur->key.op == OP_ASSIGN_FINAL)
2439 event->mode_final = true;
2440 event->mode_set = true;
2442 log_debug("MODE %#o %s:%u\n",
2444 &rules->buf[rule->rule.filename_off],
2445 rule->rule.filename_line);
2449 if (event->owner_final)
2451 if (cur->key.op == OP_ASSIGN_FINAL)
2452 event->owner_final = true;
2453 event->uid = cur->key.uid;
2454 log_debug("OWNER %u %s:%u\n",
2456 &rules->buf[rule->rule.filename_off],
2457 rule->rule.filename_line);
2460 if (event->group_final)
2462 if (cur->key.op == OP_ASSIGN_FINAL)
2463 event->group_final = true;
2464 event->gid = cur->key.gid;
2465 log_debug("GROUP %u %s:%u\n",
2467 &rules->buf[rule->rule.filename_off],
2468 rule->rule.filename_line);
2471 if (event->mode_final)
2473 if (cur->key.op == OP_ASSIGN_FINAL)
2474 event->mode_final = true;
2475 event->mode_set = true;
2476 event->mode = cur->key.mode;
2477 log_debug("MODE %#o %s:%u\n",
2479 &rules->buf[rule->rule.filename_off],
2480 rule->rule.filename_line);
2483 const char *name = &rules->buf[cur->key.attr_off];
2484 char *value = &rules->buf[cur->key.value_off];
2486 if (value[0] != '\0') {
2487 char temp_value[UTIL_NAME_SIZE];
2488 struct udev_list_entry *entry;
2490 udev_event_apply_format(event, value, temp_value, sizeof(temp_value));
2491 entry = udev_device_add_property(event->dev, name, temp_value);
2492 /* store in db, skip private keys */
2494 udev_list_entry_set_num(entry, true);
2496 udev_device_add_property(event->dev, name, NULL);
2501 char tag[UTIL_PATH_SIZE];
2504 udev_event_apply_format(event, &rules->buf[cur->key.value_off], tag, sizeof(tag));
2505 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2506 udev_device_cleanup_tags_list(event->dev);
2507 for (p = tag; *p != '\0'; p++) {
2508 if ((*p >= 'a' && *p <= 'z') ||
2509 (*p >= 'A' && *p <= 'Z') ||
2510 (*p >= '0' && *p <= '9') ||
2511 *p == '-' || *p == '_')
2513 log_error("ignoring invalid tag name '%s'\n", tag);
2516 udev_device_add_tag(event->dev, tag);
2520 const char *name = &rules->buf[cur->key.value_off];
2522 char name_str[UTIL_PATH_SIZE];
2525 if (event->name_final)
2527 if (cur->key.op == OP_ASSIGN_FINAL)
2528 event->name_final = true;
2529 udev_event_apply_format(event, name, name_str, sizeof(name_str));
2530 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2531 count = util_replace_chars(name_str, "/");
2533 log_debug("%i character(s) replaced\n", count);
2535 if (major(udev_device_get_devnum(event->dev)) &&
2536 (!streq(name_str, udev_device_get_devnode(event->dev) + strlen("/dev/")))) {
2537 log_error("NAME=\"%s\" ignored, kernel device nodes "
2538 "can not be renamed; please fix it in %s:%u\n", name,
2539 &rules->buf[rule->rule.filename_off], rule->rule.filename_line);
2543 event->name = strdup(name_str);
2544 log_debug("NAME '%s' %s:%u\n",
2546 &rules->buf[rule->rule.filename_off],
2547 rule->rule.filename_line);
2550 case TK_A_DEVLINK: {
2551 char temp[UTIL_PATH_SIZE];
2552 char filename[UTIL_PATH_SIZE];
2556 if (event->devlink_final)
2558 if (major(udev_device_get_devnum(event->dev)) == 0)
2560 if (cur->key.op == OP_ASSIGN_FINAL)
2561 event->devlink_final = true;
2562 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2563 udev_device_cleanup_devlinks_list(event->dev);
2565 /* allow multiple symlinks separated by spaces */
2566 udev_event_apply_format(event, &rules->buf[cur->key.value_off], temp, sizeof(temp));
2567 if (esc == ESCAPE_UNSET)
2568 count = util_replace_chars(temp, "/ ");
2569 else if (esc == ESCAPE_REPLACE)
2570 count = util_replace_chars(temp, "/");
2572 log_debug("%i character(s) replaced\n" , count);
2574 while (isspace(pos[0]))
2576 next = strchr(pos, ' ');
2577 while (next != NULL) {
2579 log_debug("LINK '%s' %s:%u\n", pos,
2580 &rules->buf[rule->rule.filename_off], rule->rule.filename_line);
2581 util_strscpyl(filename, sizeof(filename), "/dev/", pos, NULL);
2582 udev_device_add_devlink(event->dev, filename, cur->key.devlink_unique);
2583 while (isspace(next[1]))
2586 next = strchr(pos, ' ');
2588 if (pos[0] != '\0') {
2589 log_debug("LINK '%s' %s:%u\n", pos,
2590 &rules->buf[rule->rule.filename_off], rule->rule.filename_line);
2591 util_strscpyl(filename, sizeof(filename), "/dev/", pos, NULL);
2592 udev_device_add_devlink(event->dev, filename, cur->key.devlink_unique);
2597 const char *key_name = &rules->buf[cur->key.attr_off];
2598 char attr[UTIL_PATH_SIZE];
2599 char value[UTIL_NAME_SIZE];
2602 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0)
2603 util_strscpyl(attr, sizeof(attr), udev_device_get_syspath(event->dev), "/", key_name, NULL);
2604 attr_subst_subdir(attr, sizeof(attr));
2606 udev_event_apply_format(event, &rules->buf[cur->key.value_off], value, sizeof(value));
2607 log_debug("ATTR '%s' writing '%s' %s:%u\n", attr, value,
2608 &rules->buf[rule->rule.filename_off],
2609 rule->rule.filename_line);
2610 f = fopen(attr, "we");
2612 if (fprintf(f, "%s", value) <= 0)
2613 log_error("error writing ATTR{%s}: %m\n", attr);
2616 log_error("error opening ATTR{%s} for writing: %m\n", attr);
2620 case TK_A_RUN_BUILTIN:
2621 case TK_A_RUN_PROGRAM: {
2622 struct udev_list_entry *entry;
2624 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2625 udev_list_cleanup(&event->run_list);
2626 log_debug("RUN '%s' %s:%u\n",
2627 &rules->buf[cur->key.value_off],
2628 &rules->buf[rule->rule.filename_off],
2629 rule->rule.filename_line);
2630 entry = udev_list_entry_add(&event->run_list, &rules->buf[cur->key.value_off], NULL);
2631 udev_list_entry_set_num(entry, cur->key.builtin_cmd);
2635 if (cur->key.rule_goto == 0)
2637 cur = &rules->tokens[cur->key.rule_goto];
2642 case TK_M_PARENTS_MIN:
2643 case TK_M_PARENTS_MAX:
2646 log_error("wrong type %u\n", cur->type);
2653 /* fast-forward to next rule */
2654 cur = rule + rule->rule.token_count;
2658 void udev_rules_apply_static_dev_perms(struct udev_rules *rules)
2666 if (rules->tokens == NULL)
2669 cur = &rules->tokens[0];
2672 switch (cur->type) {
2677 /* skip rules without a static_node tag */
2678 if (!rule->rule.has_static_node)
2692 mode = cur->key.mode;
2694 case TK_A_STATIC_NODE: {
2695 char filename[UTIL_PATH_SIZE];
2698 /* we assure, that the permissions tokens are sorted before the static token */
2699 if (mode == 0 && uid == 0 && gid == 0)
2701 util_strscpyl(filename, sizeof(filename), "/dev/",
2702 &rules->buf[cur->key.value_off], NULL);
2703 if (stat(filename, &stats) != 0)
2705 if (!S_ISBLK(stats.st_mode) && !S_ISCHR(stats.st_mode))
2713 if (mode != (stats.st_mode & 01777)) {
2714 chmod(filename, mode);
2715 log_debug("chmod '%s' %#o\n", filename, mode);
2718 if ((uid != 0 && uid != stats.st_uid) || (gid != 0 && gid != stats.st_gid)) {
2719 chown(filename, uid, gid);
2720 log_debug("chown '%s' %u %u\n", filename, uid, gid);
2723 utimensat(AT_FDCWD, filename, NULL, 0);
2733 /* fast-forward to next rule */
2734 cur = rule + rule->rule.token_count;