2 * Copyright (C) 2003-2012 Kay Sievers <kay@vrfy.org>
4 * This program is free software: you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation, either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <http://www.gnu.org/licenses/>.
33 #include "path-util.h"
34 #include "conf-files.h"
39 #define PREALLOC_TOKEN 2048
42 unsigned int name_off;
49 static const char* const rules_dirs[] = {
52 UDEVLIBEXECDIR "/rules.d",
60 /* every key in the rules file becomes a token */
62 unsigned int token_cur;
63 unsigned int token_max;
65 /* all key strings are copied and de-duplicated in a single continuous string buffer */
66 struct strbuf *strbuf;
68 /* during rule parsing, uid/gid lookup results are cached */
70 unsigned int uids_cur;
71 unsigned int uids_max;
73 unsigned int gids_cur;
74 unsigned int gids_max;
77 static char *rules_str(struct udev_rules *rules, unsigned int off) {
78 return rules->strbuf->buf + off;
81 static unsigned int rules_add_string(struct udev_rules *rules, const char *s) {
82 return strbuf_add_string(rules->strbuf, s, strlen(s));
85 /* KEY=="", KEY!="", KEY+="", KEY-="", KEY="", KEY:="" */
99 enum string_glob_type {
101 GL_PLAIN, /* no special chars */
102 GL_GLOB, /* shell globs ?,*,[] */
103 GL_SPLIT, /* multi-value A|B */
104 GL_SPLIT_GLOB, /* multi-value with glob A*|B* */
105 GL_SOMETHING, /* commonly used "?*" */
108 enum string_subst_type {
115 /* tokens of a rule are sorted/handled in this order */
120 TK_M_ACTION, /* val */
121 TK_M_DEVPATH, /* val */
122 TK_M_KERNEL, /* val */
123 TK_M_DEVLINK, /* val */
125 TK_M_ENV, /* val, attr */
127 TK_M_SUBSYSTEM, /* val */
128 TK_M_DRIVER, /* val */
129 TK_M_WAITFOR, /* val */
130 TK_M_ATTR, /* val, attr */
133 TK_M_KERNELS, /* val */
134 TK_M_SUBSYSTEMS, /* val */
135 TK_M_DRIVERS, /* val */
136 TK_M_ATTRS, /* val, attr */
140 TK_M_TEST, /* val, mode_t */
141 TK_M_PROGRAM, /* val */
142 TK_M_IMPORT_FILE, /* val */
143 TK_M_IMPORT_PROG, /* val */
144 TK_M_IMPORT_BUILTIN, /* val */
145 TK_M_IMPORT_DB, /* val */
146 TK_M_IMPORT_CMDLINE, /* val */
147 TK_M_IMPORT_PARENT, /* val */
148 TK_M_RESULT, /* val */
151 TK_A_STRING_ESCAPE_NONE,
152 TK_A_STRING_ESCAPE_REPLACE,
154 TK_A_INOTIFY_WATCH, /* int */
155 TK_A_DEVLINK_PRIO, /* int */
156 TK_A_OWNER, /* val */
157 TK_A_GROUP, /* val */
159 TK_A_OWNER_ID, /* uid_t */
160 TK_A_GROUP_ID, /* gid_t */
161 TK_A_MODE_ID, /* mode_t */
163 TK_A_STATIC_NODE, /* val */
164 TK_A_SECLABEL, /* val, attr */
165 TK_A_ENV, /* val, attr */
167 TK_A_DEVLINK, /* val */
168 TK_A_ATTR, /* val, attr */
169 TK_A_RUN_BUILTIN, /* val, bool */
170 TK_A_RUN_PROGRAM, /* val, bool */
171 TK_A_GOTO, /* size_t */
176 /* we try to pack stuff in a way that we take only 12 bytes per token */
179 unsigned char type; /* same in rule and key */
181 enum token_type type:8;
183 bool has_static_node:1;
184 unsigned int unused:6;
185 unsigned short token_count;
186 unsigned int label_off;
187 unsigned short filename_off;
188 unsigned short filename_line;
191 enum token_type type:8;
192 enum operation_type op:8;
193 enum string_glob_type glob:8;
194 enum string_subst_type subst:4;
195 enum string_subst_type attrsubst:4;
196 unsigned int value_off;
198 unsigned int attr_off;
199 unsigned int rule_goto;
205 enum udev_builtin_cmd builtin_cmd;
213 struct udev_rules *rules;
215 struct token token[MAX_TK];
216 unsigned int token_cur;
220 static const char *operation_str(enum operation_type type) {
221 static const char *operation_strs[] = {
222 [OP_UNSET] = "UNSET",
223 [OP_MATCH] = "match",
224 [OP_NOMATCH] = "nomatch",
225 [OP_MATCH_MAX] = "MATCH_MAX",
228 [OP_REMOVE] = "remove",
229 [OP_ASSIGN] = "assign",
230 [OP_ASSIGN_FINAL] = "assign-final",
233 return operation_strs[type];
236 static const char *string_glob_str(enum string_glob_type type) {
237 static const char *string_glob_strs[] = {
238 [GL_UNSET] = "UNSET",
239 [GL_PLAIN] = "plain",
241 [GL_SPLIT] = "split",
242 [GL_SPLIT_GLOB] = "split-glob",
243 [GL_SOMETHING] = "split-glob",
246 return string_glob_strs[type];
249 static const char *token_str(enum token_type type) {
250 static const char *token_strs[] = {
251 [TK_UNSET] = "UNSET",
254 [TK_M_ACTION] = "M ACTION",
255 [TK_M_DEVPATH] = "M DEVPATH",
256 [TK_M_KERNEL] = "M KERNEL",
257 [TK_M_DEVLINK] = "M DEVLINK",
258 [TK_M_NAME] = "M NAME",
259 [TK_M_ENV] = "M ENV",
260 [TK_M_TAG] = "M TAG",
261 [TK_M_SUBSYSTEM] = "M SUBSYSTEM",
262 [TK_M_DRIVER] = "M DRIVER",
263 [TK_M_WAITFOR] = "M WAITFOR",
264 [TK_M_ATTR] = "M ATTR",
266 [TK_M_PARENTS_MIN] = "M PARENTS_MIN",
267 [TK_M_KERNELS] = "M KERNELS",
268 [TK_M_SUBSYSTEMS] = "M SUBSYSTEMS",
269 [TK_M_DRIVERS] = "M DRIVERS",
270 [TK_M_ATTRS] = "M ATTRS",
271 [TK_M_TAGS] = "M TAGS",
272 [TK_M_PARENTS_MAX] = "M PARENTS_MAX",
274 [TK_M_TEST] = "M TEST",
275 [TK_M_PROGRAM] = "M PROGRAM",
276 [TK_M_IMPORT_FILE] = "M IMPORT_FILE",
277 [TK_M_IMPORT_PROG] = "M IMPORT_PROG",
278 [TK_M_IMPORT_BUILTIN] = "M IMPORT_BUILTIN",
279 [TK_M_IMPORT_DB] = "M IMPORT_DB",
280 [TK_M_IMPORT_CMDLINE] = "M IMPORT_CMDLINE",
281 [TK_M_IMPORT_PARENT] = "M IMPORT_PARENT",
282 [TK_M_RESULT] = "M RESULT",
283 [TK_M_MAX] = "M MAX",
285 [TK_A_STRING_ESCAPE_NONE] = "A STRING_ESCAPE_NONE",
286 [TK_A_STRING_ESCAPE_REPLACE] = "A STRING_ESCAPE_REPLACE",
287 [TK_A_DB_PERSIST] = "A DB_PERSIST",
288 [TK_A_INOTIFY_WATCH] = "A INOTIFY_WATCH",
289 [TK_A_DEVLINK_PRIO] = "A DEVLINK_PRIO",
290 [TK_A_OWNER] = "A OWNER",
291 [TK_A_GROUP] = "A GROUP",
292 [TK_A_MODE] = "A MODE",
293 [TK_A_OWNER_ID] = "A OWNER_ID",
294 [TK_A_GROUP_ID] = "A GROUP_ID",
295 [TK_A_STATIC_NODE] = "A STATIC_NODE",
296 [TK_A_SECLABEL] = "A SECLABEL",
297 [TK_A_MODE_ID] = "A MODE_ID",
298 [TK_A_ENV] = "A ENV",
299 [TK_A_TAG] = "A ENV",
300 [TK_A_NAME] = "A NAME",
301 [TK_A_DEVLINK] = "A DEVLINK",
302 [TK_A_ATTR] = "A ATTR",
303 [TK_A_RUN_BUILTIN] = "A RUN_BUILTIN",
304 [TK_A_RUN_PROGRAM] = "A RUN_PROGRAM",
305 [TK_A_GOTO] = "A GOTO",
310 return token_strs[type];
313 static void dump_token(struct udev_rules *rules, struct token *token) {
314 enum token_type type = token->type;
315 enum operation_type op = token->key.op;
316 enum string_glob_type glob = token->key.glob;
317 const char *value = str(rules, token->key.value_off);
318 const char *attr = &rules->buf[token->key.attr_off];
323 const char *tks_ptr = (char *)rules->tokens;
324 const char *tk_ptr = (char *)token;
325 unsigned int idx = (tk_ptr - tks_ptr) / sizeof(struct token);
327 log_debug("* RULE %s:%u, token: %u, count: %u, label: '%s'",
328 &rules->buf[token->rule.filename_off], token->rule.filename_line,
329 idx, token->rule.token_count,
330 &rules->buf[token->rule.label_off]);
342 case TK_M_SUBSYSTEMS:
346 case TK_M_IMPORT_FILE:
347 case TK_M_IMPORT_PROG:
349 case TK_M_IMPORT_CMDLINE:
350 case TK_M_IMPORT_PARENT:
357 case TK_A_RUN_BUILTIN:
358 case TK_A_RUN_PROGRAM:
359 log_debug("%s %s '%s'(%s)",
360 token_str(type), operation_str(op), value, string_glob_str(glob));
362 case TK_M_IMPORT_BUILTIN:
363 log_debug("%s %i '%s'", token_str(type), token->key.builtin_cmd, value);
370 log_debug("%s %s '%s' '%s'(%s)",
371 token_str(type), operation_str(op), attr, value, string_glob_str(glob));
375 log_debug("%s %s '%s'", token_str(type), operation_str(op), value);
377 case TK_A_STRING_ESCAPE_NONE:
378 case TK_A_STRING_ESCAPE_REPLACE:
379 case TK_A_DB_PERSIST:
380 log_debug("%s", token_str(type));
383 log_debug("%s %s '%s'(%s) %#o",
384 token_str(type), operation_str(op), value, string_glob_str(glob), token->key.mode);
386 case TK_A_INOTIFY_WATCH:
387 log_debug("%s %u", token_str(type), token->key.watch);
389 case TK_A_DEVLINK_PRIO:
390 log_debug("%s %u", token_str(type), token->key.devlink_prio);
393 log_debug("%s %s %u", token_str(type), operation_str(op), token->key.uid);
396 log_debug("%s %s %u", token_str(type), operation_str(op), token->key.gid);
399 log_debug("%s %s %#o", token_str(type), operation_str(op), token->key.mode);
401 case TK_A_STATIC_NODE:
402 log_debug("%s '%s'", token_str(type), value);
405 log_debug("%s %s '%s' '%s'", token_str(type), operation_str(op), attr, value);
408 log_debug("%s '%s' %u", token_str(type), value, token->key.rule_goto);
411 log_debug("* %s", token_str(type));
413 case TK_M_PARENTS_MIN:
414 case TK_M_PARENTS_MAX:
417 log_debug("unknown type %u", type);
422 static void dump_rules(struct udev_rules *rules) {
425 log_debug("dumping %u (%zu bytes) tokens, %u (%zu bytes) strings",
427 rules->token_cur * sizeof(struct token),
430 for (i = 0; i < rules->token_cur; i++)
431 dump_token(rules, &rules->tokens[i]);
434 static inline void dump_token(struct udev_rules *rules, struct token *token) {}
435 static inline void dump_rules(struct udev_rules *rules) {}
438 static int add_token(struct udev_rules *rules, struct token *token) {
439 /* grow buffer if needed */
440 if (rules->token_cur+1 >= rules->token_max) {
441 struct token *tokens;
444 /* double the buffer size */
445 add = rules->token_max;
449 tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
452 rules->tokens = tokens;
453 rules->token_max += add;
455 memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
460 static uid_t add_uid(struct udev_rules *rules, const char *owner) {
465 /* lookup, if we know it already */
466 for (i = 0; i < rules->uids_cur; i++) {
467 off = rules->uids[i].name_off;
468 if (streq(rules_str(rules, off), owner)) {
469 uid = rules->uids[i].uid;
473 uid = util_lookup_user(rules->udev, owner);
475 /* grow buffer if needed */
476 if (rules->uids_cur+1 >= rules->uids_max) {
477 struct uid_gid *uids;
480 /* double the buffer size */
481 add = rules->uids_max;
485 uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
489 rules->uids_max += add;
491 rules->uids[rules->uids_cur].uid = uid;
492 off = rules_add_string(rules, owner);
495 rules->uids[rules->uids_cur].name_off = off;
500 static gid_t add_gid(struct udev_rules *rules, const char *group) {
505 /* lookup, if we know it already */
506 for (i = 0; i < rules->gids_cur; i++) {
507 off = rules->gids[i].name_off;
508 if (streq(rules_str(rules, off), group)) {
509 gid = rules->gids[i].gid;
513 gid = util_lookup_group(rules->udev, group);
515 /* grow buffer if needed */
516 if (rules->gids_cur+1 >= rules->gids_max) {
517 struct uid_gid *gids;
520 /* double the buffer size */
521 add = rules->gids_max;
525 gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid));
529 rules->gids_max += add;
531 rules->gids[rules->gids_cur].gid = gid;
532 off = rules_add_string(rules, group);
535 rules->gids[rules->gids_cur].name_off = off;
540 static int import_property_from_string(struct udev_device *dev, char *line) {
544 struct udev_list_entry *entry;
548 while (isspace(key[0]))
551 /* comment or empty line */
552 if (key[0] == '#' || key[0] == '\0')
555 /* split key/value */
556 val = strchr(key, '=');
563 while (isspace(val[0]))
570 while (isspace(key[len-1]))
574 /* terminate value */
578 while (isspace(val[len-1]))
586 if (val[0] == '"' || val[0] == '\'') {
587 if (val[len-1] != val[0]) {
588 log_debug("inconsistent quoting: '%s', skip", line);
595 entry = udev_device_add_property(dev, key, val);
596 /* store in db, skip private keys */
598 udev_list_entry_set_num(entry, true);
603 static int import_file_into_properties(struct udev_device *dev, const char *filename) {
605 char line[UTIL_LINE_SIZE];
607 f = fopen(filename, "re");
610 while (fgets(line, sizeof(line), f) != NULL)
611 import_property_from_string(dev, line);
616 static int import_program_into_properties(struct udev_event *event,
618 const char *program, const sigset_t *sigmask) {
619 struct udev_device *dev = event->dev;
621 char result[UTIL_LINE_SIZE];
625 envp = udev_device_get_properties_envp(dev);
626 err = udev_event_spawn(event, timeout_usec, program, envp, sigmask, result, sizeof(result));
631 while (line != NULL) {
634 pos = strchr(line, '\n');
639 import_property_from_string(dev, line);
645 static int import_parent_into_properties(struct udev_device *dev, const char *filter) {
646 struct udev_device *dev_parent;
647 struct udev_list_entry *list_entry;
649 dev_parent = udev_device_get_parent(dev);
650 if (dev_parent == NULL)
653 udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
654 const char *key = udev_list_entry_get_name(list_entry);
655 const char *val = udev_list_entry_get_value(list_entry);
657 if (fnmatch(filter, key, 0) == 0) {
658 struct udev_list_entry *entry;
660 entry = udev_device_add_property(dev, key, val);
661 /* store in db, skip private keys */
663 udev_list_entry_set_num(entry, true);
669 #define WAIT_LOOP_PER_SECOND 50
670 static int wait_for_file(struct udev_device *dev, const char *file, int timeout) {
671 char filepath[UTIL_PATH_SIZE];
672 char devicepath[UTIL_PATH_SIZE];
674 int loop = timeout * WAIT_LOOP_PER_SECOND;
676 /* a relative path is a device attribute */
677 devicepath[0] = '\0';
678 if (file[0] != '/') {
679 strscpyl(devicepath, sizeof(devicepath), udev_device_get_syspath(dev), NULL);
680 strscpyl(filepath, sizeof(filepath), devicepath, "/", file, NULL);
685 const struct timespec duration = { 0, 1000 * 1000 * 1000 / WAIT_LOOP_PER_SECOND };
688 if (stat(file, &stats) == 0) {
689 log_debug("file '%s' appeared after %i loops", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
692 /* make sure, the device did not disappear in the meantime */
693 if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
694 log_debug("device disappeared while waiting for '%s'", file);
697 log_debug("wait for '%s' for %i mseconds", file, 1000 / WAIT_LOOP_PER_SECOND);
698 nanosleep(&duration, NULL);
700 log_debug("waiting for '%s' failed", file);
704 static int attr_subst_subdir(char *attr, size_t len) {
707 if (strstr(attr, "/*/")) {
709 char dirname[UTIL_PATH_SIZE];
713 strscpy(dirname, sizeof(dirname), attr);
714 pos = strstr(dirname, "/*/");
719 dir = opendir(dirname);
723 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
726 if (dent->d_name[0] == '.')
728 strscpyl(attr, len, dirname, "/", dent->d_name, tail, NULL);
729 if (stat(attr, &stats) == 0) {
741 static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value) {
746 if (linepos == NULL || linepos[0] == '\0')
749 /* skip whitespace */
750 while (isspace(linepos[0]) || linepos[0] == ',')
754 if (linepos[0] == '\0')
760 if (linepos[0] == '\0')
762 if (isspace(linepos[0]))
764 if (linepos[0] == '=')
766 if ((linepos[0] == '+') || (linepos[0] == '-') || (linepos[0] == '!') || (linepos[0] == ':'))
767 if (linepos[1] == '=')
771 /* remember end of key */
774 /* skip whitespace after key */
775 while (isspace(linepos[0]))
777 if (linepos[0] == '\0')
780 /* get operation type */
781 if (linepos[0] == '=' && linepos[1] == '=') {
784 } else if (linepos[0] == '!' && linepos[1] == '=') {
787 } else if (linepos[0] == '+' && linepos[1] == '=') {
790 } else if (linepos[0] == '-' && linepos[1] == '=') {
793 } else if (linepos[0] == '=') {
796 } else if (linepos[0] == ':' && linepos[1] == '=') {
797 *op = OP_ASSIGN_FINAL;
805 /* skip whitespace after operator */
806 while (isspace(linepos[0]))
808 if (linepos[0] == '\0')
812 if (linepos[0] == '"')
819 temp = strchr(linepos, '"');
825 /* move line to next key */
830 /* extract possible KEY{attr} */
831 static const char *get_key_attribute(struct udev *udev, char *str) {
835 attr = strchr(str, '{');
838 pos = strchr(attr, '}');
840 log_error("missing closing brace for format");
849 static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
850 enum operation_type op,
851 const char *value, const void *data) {
852 struct token *token = &rule_tmp->token[rule_tmp->token_cur];
853 const char *attr = NULL;
855 memzero(token, sizeof(struct token));
867 case TK_M_SUBSYSTEMS:
871 case TK_M_IMPORT_FILE:
872 case TK_M_IMPORT_PROG:
874 case TK_M_IMPORT_CMDLINE:
875 case TK_M_IMPORT_PARENT:
885 case TK_A_STATIC_NODE:
886 token->key.value_off = rules_add_string(rule_tmp->rules, value);
888 case TK_M_IMPORT_BUILTIN:
889 token->key.value_off = rules_add_string(rule_tmp->rules, value);
890 token->key.builtin_cmd = *(enum udev_builtin_cmd *)data;
899 token->key.value_off = rules_add_string(rule_tmp->rules, value);
900 token->key.attr_off = rules_add_string(rule_tmp->rules, attr);
903 token->key.value_off = rules_add_string(rule_tmp->rules, value);
905 token->key.mode = *(mode_t *)data;
907 case TK_A_STRING_ESCAPE_NONE:
908 case TK_A_STRING_ESCAPE_REPLACE:
909 case TK_A_DB_PERSIST:
911 case TK_A_RUN_BUILTIN:
912 case TK_A_RUN_PROGRAM:
913 token->key.builtin_cmd = *(enum udev_builtin_cmd *)data;
914 token->key.value_off = rules_add_string(rule_tmp->rules, value);
916 case TK_A_INOTIFY_WATCH:
917 case TK_A_DEVLINK_PRIO:
918 token->key.devlink_prio = *(int *)data;
921 token->key.uid = *(uid_t *)data;
924 token->key.gid = *(gid_t *)data;
927 token->key.mode = *(mode_t *)data;
930 case TK_M_PARENTS_MIN:
931 case TK_M_PARENTS_MAX:
935 log_error("wrong type %u", type);
939 if (value != NULL && type < TK_M_MAX) {
940 /* check if we need to split or call fnmatch() while matching rules */
941 enum string_glob_type glob;
945 has_split = (strchr(value, '|') != NULL);
946 has_glob = string_is_glob(value);
947 if (has_split && has_glob) {
948 glob = GL_SPLIT_GLOB;
949 } else if (has_split) {
951 } else if (has_glob) {
952 if (streq(value, "?*"))
959 token->key.glob = glob;
962 if (value != NULL && type > TK_M_MAX) {
963 /* check if assigned value has substitution chars */
965 token->key.subst = SB_SUBSYS;
966 else if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
967 token->key.subst = SB_FORMAT;
969 token->key.subst = SB_NONE;
973 /* check if property/attribute name has substitution chars */
975 token->key.attrsubst = SB_SUBSYS;
976 else if (strchr(attr, '%') != NULL || strchr(attr, '$') != NULL)
977 token->key.attrsubst = SB_FORMAT;
979 token->key.attrsubst = SB_NONE;
982 token->key.type = type;
984 rule_tmp->token_cur++;
985 if (rule_tmp->token_cur >= ELEMENTSOF(rule_tmp->token)) {
986 log_error("temporary rule array too small");
992 static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp) {
994 unsigned int start = 0;
995 unsigned int end = rule_tmp->token_cur;
997 for (i = 0; i < rule_tmp->token_cur; i++) {
998 enum token_type next_val = TK_UNSET;
999 unsigned int next_idx = 0;
1002 /* find smallest value */
1003 for (j = start; j < end; j++) {
1004 if (rule_tmp->token[j].type == TK_UNSET)
1006 if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
1007 next_val = rule_tmp->token[j].type;
1012 /* add token and mark done */
1013 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
1015 rule_tmp->token[next_idx].type = TK_UNSET;
1018 if (next_idx == start)
1020 if (next_idx+1 == end)
1026 static int add_rule(struct udev_rules *rules, char *line,
1027 const char *filename, unsigned int filename_off, unsigned int lineno) {
1030 struct rule_tmp rule_tmp;
1032 memzero(&rule_tmp, sizeof(struct rule_tmp));
1033 rule_tmp.rules = rules;
1034 rule_tmp.rule.type = TK_RULE;
1035 /* the offset in the rule is limited to unsigned short */
1036 if (filename_off < USHRT_MAX)
1037 rule_tmp.rule.rule.filename_off = filename_off;
1038 rule_tmp.rule.rule.filename_line = lineno;
1044 enum operation_type op;
1046 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0) {
1047 /* Avoid erroring on trailing whitespace. This is probably rare
1048 * so save the work for the error case instead of always trying
1049 * to strip the trailing whitespace with strstrip(). */
1050 while (isblank(*linepos))
1053 /* If we aren't at the end of the line, this is a parsing error.
1054 * Make a best effort to describe where the problem is. */
1055 if (*linepos != '\n') {
1056 char buf[2] = {linepos[1]};
1057 _cleanup_free_ char *tmp;
1060 log_error("invalid key/value pair in file %s on line %u,"
1061 "starting at character %tu ('%s')\n",
1062 filename, lineno, linepos - line + 1, tmp);
1063 if (linepos[1] == '#')
1064 log_error("hint: comments can only start at beginning of line");
1069 if (streq(key, "ACTION")) {
1070 if (op > OP_MATCH_MAX) {
1071 log_error("invalid ACTION operation");
1074 rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL);
1078 if (streq(key, "DEVPATH")) {
1079 if (op > OP_MATCH_MAX) {
1080 log_error("invalid DEVPATH operation");
1083 rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
1087 if (streq(key, "KERNEL")) {
1088 if (op > OP_MATCH_MAX) {
1089 log_error("invalid KERNEL operation");
1092 rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL);
1096 if (streq(key, "SUBSYSTEM")) {
1097 if (op > OP_MATCH_MAX) {
1098 log_error("invalid SUBSYSTEM operation");
1101 /* bus, class, subsystem events should all be the same */
1102 if (streq(value, "subsystem") ||
1103 streq(value, "bus") ||
1104 streq(value, "class")) {
1105 if (streq(value, "bus") || streq(value, "class"))
1106 log_error("'%s' must be specified as 'subsystem' "
1107 "please fix it in %s:%u", value, filename, lineno);
1108 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
1110 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
1114 if (streq(key, "DRIVER")) {
1115 if (op > OP_MATCH_MAX) {
1116 log_error("invalid DRIVER operation");
1119 rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL);
1123 if (startswith(key, "ATTR{")) {
1124 attr = get_key_attribute(rules->udev, key + strlen("ATTR"));
1126 log_error("error parsing ATTR attribute");
1129 if (op == OP_REMOVE) {
1130 log_error("invalid ATTR operation");
1133 if (op < OP_MATCH_MAX) {
1134 rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
1136 rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr);
1141 if (startswith(key, "SECLABEL{")) {
1142 attr = get_key_attribute(rules->udev, key + strlen("SECLABEL"));
1144 log_error("error parsing SECLABEL attribute");
1147 if (op == OP_REMOVE) {
1148 log_error("invalid SECLABEL operation");
1152 rule_add_key(&rule_tmp, TK_A_SECLABEL, op, value, attr);
1156 if (streq(key, "KERNELS")) {
1157 if (op > OP_MATCH_MAX) {
1158 log_error("invalid KERNELS operation");
1161 rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1165 if (streq(key, "SUBSYSTEMS")) {
1166 if (op > OP_MATCH_MAX) {
1167 log_error("invalid SUBSYSTEMS operation");
1170 rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1174 if (streq(key, "DRIVERS")) {
1175 if (op > OP_MATCH_MAX) {
1176 log_error("invalid DRIVERS operation");
1179 rule_add_key(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
1183 if (startswith(key, "ATTRS{")) {
1184 if (op > OP_MATCH_MAX) {
1185 log_error("invalid ATTRS operation");
1188 attr = get_key_attribute(rules->udev, key + strlen("ATTRS"));
1190 log_error("error parsing ATTRS attribute");
1193 if (startswith(attr, "device/"))
1194 log_error("the 'device' link may not be available in a future kernel, "
1195 "please fix it in %s:%u", filename, lineno);
1196 else if (strstr(attr, "../") != NULL)
1197 log_error("do not reference parent sysfs directories directly, "
1198 "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
1199 rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1203 if (streq(key, "TAGS")) {
1204 if (op > OP_MATCH_MAX) {
1205 log_error("invalid TAGS operation");
1208 rule_add_key(&rule_tmp, TK_M_TAGS, op, value, NULL);
1212 if (startswith(key, "ENV{")) {
1213 attr = get_key_attribute(rules->udev, key + strlen("ENV"));
1215 log_error("error parsing ENV attribute");
1218 if (op == OP_REMOVE) {
1219 log_error("invalid ENV operation");
1222 if (op < OP_MATCH_MAX) {
1223 if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
1226 static const char *blacklist[] = {
1241 for (i = 0; i < ELEMENTSOF(blacklist); i++) {
1242 if (!streq(attr, blacklist[i]))
1244 log_error("invalid ENV attribute, '%s' can not be set %s:%u", attr, filename, lineno);
1247 if (rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
1253 if (streq(key, "TAG")) {
1254 if (op < OP_MATCH_MAX)
1255 rule_add_key(&rule_tmp, TK_M_TAG, op, value, NULL);
1257 rule_add_key(&rule_tmp, TK_A_TAG, op, value, NULL);
1261 if (streq(key, "PROGRAM")) {
1262 if (op == OP_REMOVE) {
1263 log_error("invalid PROGRAM operation");
1266 rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
1270 if (streq(key, "RESULT")) {
1271 if (op > OP_MATCH_MAX) {
1272 log_error("invalid RESULT operation");
1275 rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL);
1279 if (startswith(key, "IMPORT")) {
1280 attr = get_key_attribute(rules->udev, key + strlen("IMPORT"));
1282 log_error("IMPORT{} type missing, ignoring IMPORT %s:%u", filename, lineno);
1285 if (op == OP_REMOVE) {
1286 log_error("invalid IMPORT operation");
1289 if (streq(attr, "program")) {
1290 /* find known built-in command */
1291 if (value[0] != '/') {
1292 enum udev_builtin_cmd cmd;
1294 cmd = udev_builtin_lookup(value);
1295 if (cmd < UDEV_BUILTIN_MAX) {
1296 log_debug("IMPORT found builtin '%s', replacing %s:%u",
1297 value, filename, lineno);
1298 rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, value, &cmd);
1302 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1303 } else if (streq(attr, "builtin")) {
1304 enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
1306 if (cmd < UDEV_BUILTIN_MAX)
1307 rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, value, &cmd);
1309 log_error("IMPORT{builtin}: '%s' unknown %s:%u", value, filename, lineno);
1310 } else if (streq(attr, "file")) {
1311 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1312 } else if (streq(attr, "db")) {
1313 rule_add_key(&rule_tmp, TK_M_IMPORT_DB, op, value, NULL);
1314 } else if (streq(attr, "cmdline")) {
1315 rule_add_key(&rule_tmp, TK_M_IMPORT_CMDLINE, op, value, NULL);
1316 } else if (streq(attr, "parent")) {
1317 rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
1319 log_error("IMPORT{} unknown type, ignoring IMPORT %s:%u", filename, lineno);
1323 if (startswith(key, "TEST")) {
1326 if (op > OP_MATCH_MAX) {
1327 log_error("invalid TEST operation");
1330 attr = get_key_attribute(rules->udev, key + strlen("TEST"));
1332 mode = strtol(attr, NULL, 8);
1333 rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode);
1335 rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL);
1340 if (startswith(key, "RUN")) {
1341 attr = get_key_attribute(rules->udev, key + strlen("RUN"));
1344 if (op == OP_REMOVE) {
1345 log_error("invalid RUN operation");
1349 if (streq(attr, "builtin")) {
1350 enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
1352 if (cmd < UDEV_BUILTIN_MAX)
1353 rule_add_key(&rule_tmp, TK_A_RUN_BUILTIN, op, value, &cmd);
1355 log_error("RUN{builtin}: '%s' unknown %s:%u", value, filename, lineno);
1356 } else if (streq(attr, "program")) {
1357 enum udev_builtin_cmd cmd = UDEV_BUILTIN_MAX;
1359 rule_add_key(&rule_tmp, TK_A_RUN_PROGRAM, op, value, &cmd);
1361 log_error("RUN{} unknown type, ignoring RUN %s:%u", filename, lineno);
1367 if (streq(key, "WAIT_FOR") || streq(key, "WAIT_FOR_SYSFS")) {
1368 if (op == OP_REMOVE) {
1369 log_error("invalid WAIT_FOR/WAIT_FOR_SYSFS operation");
1372 rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1376 if (streq(key, "LABEL")) {
1377 if (op == OP_REMOVE) {
1378 log_error("invalid LABEL operation");
1381 rule_tmp.rule.rule.label_off = rules_add_string(rules, value);
1385 if (streq(key, "GOTO")) {
1386 if (op == OP_REMOVE) {
1387 log_error("invalid GOTO operation");
1390 rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1394 if (startswith(key, "NAME")) {
1395 if (op == OP_REMOVE) {
1396 log_error("invalid NAME operation");
1399 if (op < OP_MATCH_MAX) {
1400 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
1402 if (streq(value, "%k")) {
1403 log_error("NAME=\"%%k\" is ignored, because it breaks kernel supplied names, "
1404 "please remove it from %s:%u\n", filename, lineno);
1407 if (value[0] == '\0') {
1408 log_debug("NAME=\"\" is ignored, because udev will not delete any device nodes, "
1409 "please remove it from %s:%u\n", filename, lineno);
1412 rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL);
1414 rule_tmp.rule.rule.can_set_name = true;
1418 if (streq(key, "SYMLINK")) {
1419 if (op == OP_REMOVE) {
1420 log_error("invalid SYMLINK operation");
1423 if (op < OP_MATCH_MAX)
1424 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
1426 rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, NULL);
1427 rule_tmp.rule.rule.can_set_name = true;
1431 if (streq(key, "OWNER")) {
1435 if (op == OP_REMOVE) {
1436 log_error("invalid OWNER operation");
1440 uid = strtoul(value, &endptr, 10);
1441 if (endptr[0] == '\0') {
1442 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1443 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1444 uid = add_uid(rules, value);
1445 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1446 } else if (rules->resolve_names >= 0) {
1447 rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
1449 rule_tmp.rule.rule.can_set_name = true;
1453 if (streq(key, "GROUP")) {
1457 if (op == OP_REMOVE) {
1458 log_error("invalid GROUP operation");
1462 gid = strtoul(value, &endptr, 10);
1463 if (endptr[0] == '\0') {
1464 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1465 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1466 gid = add_gid(rules, value);
1467 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1468 } else if (rules->resolve_names >= 0) {
1469 rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
1471 rule_tmp.rule.rule.can_set_name = true;
1475 if (streq(key, "MODE")) {
1479 if (op == OP_REMOVE) {
1480 log_error("invalid MODE operation");
1484 mode = strtol(value, &endptr, 8);
1485 if (endptr[0] == '\0')
1486 rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1488 rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
1489 rule_tmp.rule.rule.can_set_name = true;
1493 if (streq(key, "OPTIONS")) {
1496 if (op == OP_REMOVE) {
1497 log_error("invalid OPTIONS operation");
1501 pos = strstr(value, "link_priority=");
1503 int prio = atoi(&pos[strlen("link_priority=")]);
1505 rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, op, NULL, &prio);
1508 pos = strstr(value, "string_escape=");
1510 pos = &pos[strlen("string_escape=")];
1511 if (startswith(pos, "none"))
1512 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, op, NULL, NULL);
1513 else if (startswith(pos, "replace"))
1514 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, op, NULL, NULL);
1517 pos = strstr(value, "db_persist");
1519 rule_add_key(&rule_tmp, TK_A_DB_PERSIST, op, NULL, NULL);
1521 pos = strstr(value, "nowatch");
1525 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &off);
1527 pos = strstr(value, "watch");
1531 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &on);
1535 pos = strstr(value, "static_node=");
1537 rule_add_key(&rule_tmp, TK_A_STATIC_NODE, op, &pos[strlen("static_node=")], NULL);
1538 rule_tmp.rule.rule.has_static_node = true;
1544 log_error("unknown key '%s' in %s:%u", key, filename, lineno);
1548 /* add rule token */
1549 rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur;
1550 if (add_token(rules, &rule_tmp.rule) != 0)
1553 /* add tokens to list, sorted by type */
1554 if (sort_token(rules, &rule_tmp) != 0)
1559 log_error("invalid rule '%s:%u'", filename, lineno);
1563 static int parse_file(struct udev_rules *rules, const char *filename) {
1565 unsigned int first_token;
1566 unsigned int filename_off;
1567 char line[UTIL_LINE_SIZE];
1571 f = fopen(filename, "re");
1573 if (errno == ENOENT)
1579 if (null_or_empty_fd(fileno(f))) {
1580 log_debug("Skipping empty file: %s", filename);
1583 log_debug("Reading rules file: %s", filename);
1585 first_token = rules->token_cur;
1586 filename_off = rules_add_string(rules, filename);
1588 while (fgets(line, sizeof(line), f) != NULL) {
1592 /* skip whitespace */
1595 while (isspace(key[0]))
1606 /* continue reading if backslash+newline is found */
1607 while (line[len-2] == '\\') {
1608 if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1610 if (strlen(&line[len-2]) < 2)
1616 if (len+1 >= sizeof(line)) {
1617 log_error("line too long '%s':%u, ignored", filename, line_nr);
1620 add_rule(rules, key, filename, filename_off, line_nr);
1624 /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1625 for (i = first_token+1; i < rules->token_cur; i++) {
1626 if (rules->tokens[i].type == TK_A_GOTO) {
1627 char *label = rules_str(rules, rules->tokens[i].key.value_off);
1630 for (j = i+1; j < rules->token_cur; j++) {
1631 if (rules->tokens[j].type != TK_RULE)
1633 if (rules->tokens[j].rule.label_off == 0)
1635 if (!streq(label, rules_str(rules, rules->tokens[j].rule.label_off)))
1637 rules->tokens[i].key.rule_goto = j;
1640 if (rules->tokens[i].key.rule_goto == 0)
1641 log_error("GOTO '%s' has no matching label in: '%s'", label, filename);
1647 struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names) {
1648 struct udev_rules *rules;
1649 struct udev_list file_list;
1650 struct token end_token;
1654 rules = new0(struct udev_rules, 1);
1658 rules->resolve_names = resolve_names;
1659 udev_list_init(udev, &file_list, true);
1661 /* init token array and string buffer */
1662 rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
1663 if (rules->tokens == NULL)
1664 return udev_rules_unref(rules);
1665 rules->token_max = PREALLOC_TOKEN;
1667 rules->strbuf = strbuf_new();
1669 return udev_rules_unref(rules);
1671 udev_rules_check_timestamp(rules);
1673 r = conf_files_list_strv(&files, ".rules", NULL, rules_dirs);
1675 log_error("failed to enumerate rules files: %s", strerror(-r));
1676 return udev_rules_unref(rules);
1680 * The offset value in the rules strct is limited; add all
1681 * rules file names to the beginning of the string buffer.
1683 STRV_FOREACH(f, files)
1684 rules_add_string(rules, *f);
1686 STRV_FOREACH(f, files)
1687 parse_file(rules, *f);
1691 memzero(&end_token, sizeof(struct token));
1692 end_token.type = TK_END;
1693 add_token(rules, &end_token);
1694 log_debug("rules contain %zu bytes tokens (%u * %zu bytes), %zu bytes strings",
1695 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->strbuf->len);
1697 /* cleanup temporary strbuf data */
1698 log_debug("%zu strings (%zu bytes), %zu de-duplicated (%zu bytes), %zu trie nodes used",
1699 rules->strbuf->in_count, rules->strbuf->in_len,
1700 rules->strbuf->dedup_count, rules->strbuf->dedup_len, rules->strbuf->nodes_count);
1701 strbuf_complete(rules->strbuf);
1703 /* cleanup uid/gid cache */
1706 rules->uids_cur = 0;
1707 rules->uids_max = 0;
1710 rules->gids_cur = 0;
1711 rules->gids_max = 0;
1717 struct udev_rules *udev_rules_unref(struct udev_rules *rules) {
1720 free(rules->tokens);
1721 strbuf_cleanup(rules->strbuf);
1728 bool udev_rules_check_timestamp(struct udev_rules *rules) {
1732 return paths_check_timestamp(rules_dirs, &rules->dirs_ts_usec, true);
1735 static int match_key(struct udev_rules *rules, struct token *token, const char *val) {
1736 char *key_value = rules_str(rules, token->key.value_off);
1743 switch (token->key.glob) {
1745 match = (streq(key_value, val));
1748 match = (fnmatch(key_value, val, 0) == 0);
1755 s = rules_str(rules, token->key.value_off);
1760 next = strchr(s, '|');
1762 size_t matchlen = (size_t)(next - s);
1764 match = (matchlen == len && strneq(s, val, matchlen));
1768 match = (streq(s, val));
1777 char value[UTIL_PATH_SIZE];
1779 strscpy(value, sizeof(value), rules_str(rules, token->key.value_off));
1781 while (key_value != NULL) {
1782 pos = strchr(key_value, '|');
1787 match = (fnmatch(key_value, val, 0) == 0);
1795 match = (val[0] != '\0');
1801 if (match && (token->key.op == OP_MATCH))
1803 if (!match && (token->key.op == OP_NOMATCH))
1808 static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur) {
1810 char nbuf[UTIL_NAME_SIZE];
1812 char vbuf[UTIL_NAME_SIZE];
1815 name = rules_str(rules, cur->key.attr_off);
1816 switch (cur->key.attrsubst) {
1818 udev_event_apply_format(event, name, nbuf, sizeof(nbuf));
1822 value = udev_device_get_sysattr_value(dev, name);
1827 if (util_resolve_subsys_kernel(event->udev, name, vbuf, sizeof(vbuf), 1) != 0)
1835 /* remove trailing whitespace, if not asked to match for it */
1836 len = strlen(value);
1837 if (len > 0 && isspace(value[len-1])) {
1838 const char *key_value;
1841 key_value = rules_str(rules, cur->key.value_off);
1842 klen = strlen(key_value);
1843 if (klen > 0 && !isspace(key_value[klen-1])) {
1844 if (value != vbuf) {
1845 strscpy(vbuf, sizeof(vbuf), value);
1848 while (len > 0 && isspace(vbuf[--len]))
1853 return match_key(rules, cur, value);
1862 int udev_rules_apply_to_event(struct udev_rules *rules,
1863 struct udev_event *event,
1864 usec_t timeout_usec,
1865 const sigset_t *sigmask) {
1868 enum escape_type esc = ESCAPE_UNSET;
1871 if (rules->tokens == NULL)
1874 can_set_name = ((!streq(udev_device_get_action(event->dev), "remove")) &&
1875 (major(udev_device_get_devnum(event->dev)) > 0 ||
1876 udev_device_get_ifindex(event->dev) > 0));
1878 /* loop through token list, match, run actions or forward to next rule */
1879 cur = &rules->tokens[0];
1882 dump_token(rules, cur);
1883 switch (cur->type) {
1887 /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
1888 if (!can_set_name && rule->rule.can_set_name)
1893 if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
1897 if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
1901 if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
1904 case TK_M_DEVLINK: {
1905 struct udev_list_entry *list_entry;
1908 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
1909 const char *devlink;
1911 devlink = udev_list_entry_get_name(list_entry) + strlen("/dev/");
1912 if (match_key(rules, cur, devlink) == 0) {
1922 if (match_key(rules, cur, event->name) != 0)
1926 const char *key_name = rules_str(rules, cur->key.attr_off);
1929 value = udev_device_get_property_value(event->dev, key_name);
1932 if (match_key(rules, cur, value))
1937 struct udev_list_entry *list_entry;
1940 udev_list_entry_foreach(list_entry, udev_device_get_tags_list_entry(event->dev)) {
1941 if (streq(rules_str(rules, cur->key.value_off), udev_list_entry_get_name(list_entry))) {
1946 if (!match && (cur->key.op != OP_NOMATCH))
1950 case TK_M_SUBSYSTEM:
1951 if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
1955 if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
1958 case TK_M_WAITFOR: {
1959 char filename[UTIL_PATH_SIZE];
1962 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), filename, sizeof(filename));
1963 found = (wait_for_file(event->dev, filename, 10) == 0);
1964 if (!found && (cur->key.op != OP_NOMATCH))
1969 if (match_attr(rules, event->dev, event, cur) != 0)
1973 case TK_M_SUBSYSTEMS:
1979 /* get whole sequence of parent matches */
1981 while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX)
1984 /* loop over parents */
1985 event->dev_parent = event->dev;
1989 /* loop over sequence of parent match keys */
1990 for (key = cur; key < next; key++ ) {
1991 dump_token(rules, key);
1994 if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
1997 case TK_M_SUBSYSTEMS:
1998 if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
2002 if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
2006 if (match_attr(rules, event->dev_parent, event, key) != 0)
2010 bool match = udev_device_has_tag(event->dev_parent, rules_str(rules, cur->key.value_off));
2012 if (match && key->key.op == OP_NOMATCH)
2014 if (!match && key->key.op == OP_MATCH)
2025 event->dev_parent = udev_device_get_parent(event->dev_parent);
2026 if (event->dev_parent == NULL)
2029 /* move behind our sequence of parent match keys */
2034 char filename[UTIL_PATH_SIZE];
2035 struct stat statbuf;
2038 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), filename, sizeof(filename));
2039 if (util_resolve_subsys_kernel(event->udev, filename, filename, sizeof(filename), 0) != 0) {
2040 if (filename[0] != '/') {
2041 char tmp[UTIL_PATH_SIZE];
2043 strscpy(tmp, sizeof(tmp), filename);
2044 strscpyl(filename, sizeof(filename),
2045 udev_device_get_syspath(event->dev), "/", tmp, NULL);
2048 attr_subst_subdir(filename, sizeof(filename));
2050 match = (stat(filename, &statbuf) == 0);
2051 if (match && cur->key.mode > 0)
2052 match = ((statbuf.st_mode & cur->key.mode) > 0);
2053 if (match && cur->key.op == OP_NOMATCH)
2055 if (!match && cur->key.op == OP_MATCH)
2059 case TK_M_PROGRAM: {
2060 char program[UTIL_PATH_SIZE];
2062 char result[UTIL_LINE_SIZE];
2064 free(event->program_result);
2065 event->program_result = NULL;
2066 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), program, sizeof(program));
2067 envp = udev_device_get_properties_envp(event->dev);
2068 log_debug("PROGRAM '%s' %s:%u",
2070 rules_str(rules, rule->rule.filename_off),
2071 rule->rule.filename_line);
2073 if (udev_event_spawn(event, timeout_usec, program, envp, sigmask, result, sizeof(result)) < 0) {
2074 if (cur->key.op != OP_NOMATCH)
2079 util_remove_trailing_chars(result, '\n');
2080 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2081 count = util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
2083 log_debug("%i character(s) replaced" , count);
2085 event->program_result = strdup(result);
2086 if (cur->key.op == OP_NOMATCH)
2091 case TK_M_IMPORT_FILE: {
2092 char import[UTIL_PATH_SIZE];
2094 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), import, sizeof(import));
2095 if (import_file_into_properties(event->dev, import) != 0)
2096 if (cur->key.op != OP_NOMATCH)
2100 case TK_M_IMPORT_PROG: {
2101 char import[UTIL_PATH_SIZE];
2103 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), import, sizeof(import));
2104 log_debug("IMPORT '%s' %s:%u",
2106 rules_str(rules, rule->rule.filename_off),
2107 rule->rule.filename_line);
2109 if (import_program_into_properties(event, timeout_usec, import, sigmask) != 0)
2110 if (cur->key.op != OP_NOMATCH)
2114 case TK_M_IMPORT_BUILTIN: {
2115 char command[UTIL_PATH_SIZE];
2117 if (udev_builtin_run_once(cur->key.builtin_cmd)) {
2118 /* check if we ran already */
2119 if (event->builtin_run & (1 << cur->key.builtin_cmd)) {
2120 log_debug("IMPORT builtin skip '%s' %s:%u",
2121 udev_builtin_name(cur->key.builtin_cmd),
2122 rules_str(rules, rule->rule.filename_off),
2123 rule->rule.filename_line);
2124 /* return the result from earlier run */
2125 if (event->builtin_ret & (1 << cur->key.builtin_cmd))
2126 if (cur->key.op != OP_NOMATCH)
2131 event->builtin_run |= (1 << cur->key.builtin_cmd);
2134 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), command, sizeof(command));
2135 log_debug("IMPORT builtin '%s' %s:%u",
2136 udev_builtin_name(cur->key.builtin_cmd),
2137 rules_str(rules, rule->rule.filename_off),
2138 rule->rule.filename_line);
2140 if (udev_builtin_run(event->dev, cur->key.builtin_cmd, command, false) != 0) {
2141 /* remember failure */
2142 log_debug("IMPORT builtin '%s' returned non-zero",
2143 udev_builtin_name(cur->key.builtin_cmd));
2144 event->builtin_ret |= (1 << cur->key.builtin_cmd);
2145 if (cur->key.op != OP_NOMATCH)
2150 case TK_M_IMPORT_DB: {
2151 const char *key = rules_str(rules, cur->key.value_off);
2154 value = udev_device_get_property_value(event->dev_db, key);
2155 if (value != NULL) {
2156 struct udev_list_entry *entry;
2158 entry = udev_device_add_property(event->dev, key, value);
2159 udev_list_entry_set_num(entry, true);
2161 if (cur->key.op != OP_NOMATCH)
2166 case TK_M_IMPORT_CMDLINE: {
2168 bool imported = false;
2170 f = fopen("/proc/cmdline", "re");
2174 if (fgets(cmdline, sizeof(cmdline), f) != NULL) {
2175 const char *key = rules_str(rules, cur->key.value_off);
2178 pos = strstr(cmdline, key);
2180 struct udev_list_entry *entry;
2183 if (pos[0] == '\0' || isspace(pos[0])) {
2184 /* we import simple flags as 'FLAG=1' */
2185 entry = udev_device_add_property(event->dev, key, "1");
2186 udev_list_entry_set_num(entry, true);
2188 } else if (pos[0] == '=') {
2193 while (pos[0] != '\0' && !isspace(pos[0]))
2196 entry = udev_device_add_property(event->dev, key, value);
2197 udev_list_entry_set_num(entry, true);
2204 if (!imported && cur->key.op != OP_NOMATCH)
2208 case TK_M_IMPORT_PARENT: {
2209 char import[UTIL_PATH_SIZE];
2211 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), import, sizeof(import));
2212 if (import_parent_into_properties(event->dev, import) != 0)
2213 if (cur->key.op != OP_NOMATCH)
2218 if (match_key(rules, cur, event->program_result) != 0)
2221 case TK_A_STRING_ESCAPE_NONE:
2224 case TK_A_STRING_ESCAPE_REPLACE:
2225 esc = ESCAPE_REPLACE;
2227 case TK_A_DB_PERSIST:
2228 udev_device_set_db_persist(event->dev);
2230 case TK_A_INOTIFY_WATCH:
2231 if (event->inotify_watch_final)
2233 if (cur->key.op == OP_ASSIGN_FINAL)
2234 event->inotify_watch_final = true;
2235 event->inotify_watch = cur->key.watch;
2237 case TK_A_DEVLINK_PRIO:
2238 udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
2241 char owner[UTIL_NAME_SIZE];
2243 if (event->owner_final)
2245 if (cur->key.op == OP_ASSIGN_FINAL)
2246 event->owner_final = true;
2247 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), owner, sizeof(owner));
2248 event->owner_set = true;
2249 event->uid = util_lookup_user(event->udev, owner);
2250 log_debug("OWNER %u %s:%u",
2252 rules_str(rules, rule->rule.filename_off),
2253 rule->rule.filename_line);
2257 char group[UTIL_NAME_SIZE];
2259 if (event->group_final)
2261 if (cur->key.op == OP_ASSIGN_FINAL)
2262 event->group_final = true;
2263 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), group, sizeof(group));
2264 event->group_set = true;
2265 event->gid = util_lookup_group(event->udev, group);
2266 log_debug("GROUP %u %s:%u",
2268 rules_str(rules, rule->rule.filename_off),
2269 rule->rule.filename_line);
2273 char mode_str[UTIL_NAME_SIZE];
2277 if (event->mode_final)
2279 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), mode_str, sizeof(mode_str));
2280 mode = strtol(mode_str, &endptr, 8);
2281 if (endptr[0] != '\0') {
2282 log_error("ignoring invalid mode '%s'", mode_str);
2285 if (cur->key.op == OP_ASSIGN_FINAL)
2286 event->mode_final = true;
2287 event->mode_set = true;
2289 log_debug("MODE %#o %s:%u",
2291 rules_str(rules, rule->rule.filename_off),
2292 rule->rule.filename_line);
2296 if (event->owner_final)
2298 if (cur->key.op == OP_ASSIGN_FINAL)
2299 event->owner_final = true;
2300 event->owner_set = true;
2301 event->uid = cur->key.uid;
2302 log_debug("OWNER %u %s:%u",
2304 rules_str(rules, rule->rule.filename_off),
2305 rule->rule.filename_line);
2308 if (event->group_final)
2310 if (cur->key.op == OP_ASSIGN_FINAL)
2311 event->group_final = true;
2312 event->group_set = true;
2313 event->gid = cur->key.gid;
2314 log_debug("GROUP %u %s:%u",
2316 rules_str(rules, rule->rule.filename_off),
2317 rule->rule.filename_line);
2320 if (event->mode_final)
2322 if (cur->key.op == OP_ASSIGN_FINAL)
2323 event->mode_final = true;
2324 event->mode_set = true;
2325 event->mode = cur->key.mode;
2326 log_debug("MODE %#o %s:%u",
2328 rules_str(rules, rule->rule.filename_off),
2329 rule->rule.filename_line);
2331 case TK_A_SECLABEL: {
2332 const char *name, *label;
2334 name = rules_str(rules, cur->key.attr_off);
2335 label = rules_str(rules, cur->key.value_off);
2336 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2337 udev_list_cleanup(&event->seclabel_list);
2338 udev_list_entry_add(&event->seclabel_list, name, label);
2339 log_debug("SECLABEL{%s}='%s' %s:%u",
2341 rules_str(rules, rule->rule.filename_off),
2342 rule->rule.filename_line);
2346 const char *name = rules_str(rules, cur->key.attr_off);
2347 char *value = rules_str(rules, cur->key.value_off);
2348 char value_new[UTIL_NAME_SIZE];
2349 const char *value_old = NULL;
2350 struct udev_list_entry *entry;
2352 if (value[0] == '\0') {
2353 if (cur->key.op == OP_ADD)
2355 udev_device_add_property(event->dev, name, NULL);
2359 if (cur->key.op == OP_ADD)
2360 value_old = udev_device_get_property_value(event->dev, name);
2362 char temp[UTIL_NAME_SIZE];
2364 /* append value separated by space */
2365 udev_event_apply_format(event, value, temp, sizeof(temp));
2366 strscpyl(value_new, sizeof(value_new), value_old, " ", temp, NULL);
2368 udev_event_apply_format(event, value, value_new, sizeof(value_new));
2370 entry = udev_device_add_property(event->dev, name, value_new);
2371 /* store in db, skip private keys */
2373 udev_list_entry_set_num(entry, true);
2377 char tag[UTIL_PATH_SIZE];
2380 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), tag, sizeof(tag));
2381 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2382 udev_device_cleanup_tags_list(event->dev);
2383 for (p = tag; *p != '\0'; p++) {
2384 if ((*p >= 'a' && *p <= 'z') ||
2385 (*p >= 'A' && *p <= 'Z') ||
2386 (*p >= '0' && *p <= '9') ||
2387 *p == '-' || *p == '_')
2389 log_error("ignoring invalid tag name '%s'", tag);
2392 if (cur->key.op == OP_REMOVE)
2393 udev_device_remove_tag(event->dev, tag);
2395 udev_device_add_tag(event->dev, tag);
2399 const char *name = rules_str(rules, cur->key.value_off);
2401 char name_str[UTIL_PATH_SIZE];
2404 if (event->name_final)
2406 if (cur->key.op == OP_ASSIGN_FINAL)
2407 event->name_final = true;
2408 udev_event_apply_format(event, name, name_str, sizeof(name_str));
2409 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2410 count = util_replace_chars(name_str, "/");
2412 log_debug("%i character(s) replaced", count);
2414 if (major(udev_device_get_devnum(event->dev)) &&
2415 (!streq(name_str, udev_device_get_devnode(event->dev) + strlen("/dev/")))) {
2416 log_error("NAME=\"%s\" ignored, kernel device nodes "
2417 "can not be renamed; please fix it in %s:%u\n", name,
2418 rules_str(rules, rule->rule.filename_off), rule->rule.filename_line);
2422 event->name = strdup(name_str);
2423 log_debug("NAME '%s' %s:%u",
2425 rules_str(rules, rule->rule.filename_off),
2426 rule->rule.filename_line);
2429 case TK_A_DEVLINK: {
2430 char temp[UTIL_PATH_SIZE];
2431 char filename[UTIL_PATH_SIZE];
2435 if (event->devlink_final)
2437 if (major(udev_device_get_devnum(event->dev)) == 0)
2439 if (cur->key.op == OP_ASSIGN_FINAL)
2440 event->devlink_final = true;
2441 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2442 udev_device_cleanup_devlinks_list(event->dev);
2444 /* allow multiple symlinks separated by spaces */
2445 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), temp, sizeof(temp));
2446 if (esc == ESCAPE_UNSET)
2447 count = util_replace_chars(temp, "/ ");
2448 else if (esc == ESCAPE_REPLACE)
2449 count = util_replace_chars(temp, "/");
2451 log_debug("%i character(s) replaced" , count);
2453 while (isspace(pos[0]))
2455 next = strchr(pos, ' ');
2456 while (next != NULL) {
2458 log_debug("LINK '%s' %s:%u", pos,
2459 rules_str(rules, rule->rule.filename_off), rule->rule.filename_line);
2460 strscpyl(filename, sizeof(filename), "/dev/", pos, NULL);
2461 udev_device_add_devlink(event->dev, filename);
2462 while (isspace(next[1]))
2465 next = strchr(pos, ' ');
2467 if (pos[0] != '\0') {
2468 log_debug("LINK '%s' %s:%u", pos,
2469 rules_str(rules, rule->rule.filename_off), rule->rule.filename_line);
2470 strscpyl(filename, sizeof(filename), "/dev/", pos, NULL);
2471 udev_device_add_devlink(event->dev, filename);
2476 const char *key_name = rules_str(rules, cur->key.attr_off);
2477 char attr[UTIL_PATH_SIZE];
2478 char value[UTIL_NAME_SIZE];
2481 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0)
2482 strscpyl(attr, sizeof(attr), udev_device_get_syspath(event->dev), "/", key_name, NULL);
2483 attr_subst_subdir(attr, sizeof(attr));
2485 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), value, sizeof(value));
2486 log_debug("ATTR '%s' writing '%s' %s:%u", attr, value,
2487 rules_str(rules, rule->rule.filename_off),
2488 rule->rule.filename_line);
2489 f = fopen(attr, "we");
2491 if (fprintf(f, "%s", value) <= 0)
2492 log_error("error writing ATTR{%s}: %m", attr);
2495 log_error("error opening ATTR{%s} for writing: %m", attr);
2499 case TK_A_RUN_BUILTIN:
2500 case TK_A_RUN_PROGRAM: {
2501 struct udev_list_entry *entry;
2503 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2504 udev_list_cleanup(&event->run_list);
2505 log_debug("RUN '%s' %s:%u",
2506 rules_str(rules, cur->key.value_off),
2507 rules_str(rules, rule->rule.filename_off),
2508 rule->rule.filename_line);
2509 entry = udev_list_entry_add(&event->run_list, rules_str(rules, cur->key.value_off), NULL);
2510 udev_list_entry_set_num(entry, cur->key.builtin_cmd);
2514 if (cur->key.rule_goto == 0)
2516 cur = &rules->tokens[cur->key.rule_goto];
2521 case TK_M_PARENTS_MIN:
2522 case TK_M_PARENTS_MAX:
2525 log_error("wrong type %u", cur->type);
2532 /* fast-forward to next rule */
2533 cur = rule + rule->rule.token_count;
2537 int udev_rules_apply_static_dev_perms(struct udev_rules *rules) {
2543 _cleanup_strv_free_ char **tags = NULL;
2546 _cleanup_free_ char *path = NULL;
2549 if (rules->tokens == NULL)
2552 cur = &rules->tokens[0];
2555 switch (cur->type) {
2560 /* skip rules without a static_node tag */
2561 if (!rule->rule.has_static_node)
2577 mode = cur->key.mode;
2580 r = strv_extend(&tags, rules_str(rules, cur->key.value_off));
2585 case TK_A_STATIC_NODE: {
2586 char device_node[UTIL_PATH_SIZE];
2587 char tags_dir[UTIL_PATH_SIZE];
2588 char tag_symlink[UTIL_PATH_SIZE];
2591 /* we assure, that the permissions tokens are sorted before the static token */
2593 if (mode == 0 && uid == 0 && gid == 0 && tags == NULL)
2596 strscpyl(device_node, sizeof(device_node), "/dev/", rules_str(rules, cur->key.value_off), NULL);
2597 if (stat(device_node, &stats) != 0)
2599 if (!S_ISBLK(stats.st_mode) && !S_ISCHR(stats.st_mode))
2602 /* export the tags to a directory as symlinks, allowing otherwise dead nodes to be tagged */
2604 STRV_FOREACH(t, tags) {
2605 _cleanup_free_ char *unescaped_filename = NULL;
2607 strscpyl(tags_dir, sizeof(tags_dir), "/run/udev/static_node-tags/", *t, "/", NULL);
2608 r = mkdir_p(tags_dir, 0755);
2610 log_error("failed to create %s: %s", tags_dir, strerror(-r));
2614 unescaped_filename = xescape(rules_str(rules, cur->key.value_off), "/.");
2616 strscpyl(tag_symlink, sizeof(tag_symlink), tags_dir, unescaped_filename, NULL);
2617 r = symlink(device_node, tag_symlink);
2618 if (r < 0 && errno != EEXIST) {
2619 log_error("failed to create symlink %s -> %s: %m", tag_symlink, device_node);
2626 /* don't touch the permissions if only the tags were set */
2627 if (mode == 0 && uid == 0 && gid == 0)
2636 if (mode != (stats.st_mode & 01777)) {
2637 r = chmod(device_node, mode);
2639 log_error("failed to chmod '%s' %#o", device_node, mode);
2642 log_debug("chmod '%s' %#o", device_node, mode);
2645 if ((uid != 0 && uid != stats.st_uid) || (gid != 0 && gid != stats.st_gid)) {
2646 r = chown(device_node, uid, gid);
2648 log_error("failed to chown '%s' %u %u ", device_node, uid, gid);
2651 log_debug("chown '%s' %u %u", device_node, uid, gid);
2654 utimensat(AT_FDCWD, device_node, NULL, 0);
2664 /* fast-forward to next rule */
2665 cur = rule + rule->rule.token_count;
2672 fchmod(fileno(f), 0644);
2673 if (ferror(f) || rename(path, "/run/udev/static_node-tags") < 0) {
2675 unlink("/run/udev/static_node-tags");