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"
38 #include "sysctl-util.h"
40 #define PREALLOC_TOKEN 2048
43 unsigned int name_off;
50 static const char* const rules_dirs[] = {
53 UDEVLIBEXECDIR "/rules.d",
61 /* every key in the rules file becomes a token */
63 unsigned int token_cur;
64 unsigned int token_max;
66 /* all key strings are copied and de-duplicated in a single continuous string buffer */
67 struct strbuf *strbuf;
69 /* during rule parsing, uid/gid lookup results are cached */
71 unsigned int uids_cur;
72 unsigned int uids_max;
74 unsigned int gids_cur;
75 unsigned int gids_max;
78 static char *rules_str(struct udev_rules *rules, unsigned int off) {
79 return rules->strbuf->buf + off;
82 static unsigned int rules_add_string(struct udev_rules *rules, const char *s) {
83 return strbuf_add_string(rules->strbuf, s, strlen(s));
86 /* KEY=="", KEY!="", KEY+="", KEY-="", KEY="", KEY:="" */
100 enum string_glob_type {
102 GL_PLAIN, /* no special chars */
103 GL_GLOB, /* shell globs ?,*,[] */
104 GL_SPLIT, /* multi-value A|B */
105 GL_SPLIT_GLOB, /* multi-value with glob A*|B* */
106 GL_SOMETHING, /* commonly used "?*" */
109 enum string_subst_type {
116 /* tokens of a rule are sorted/handled in this order */
121 TK_M_ACTION, /* val */
122 TK_M_DEVPATH, /* val */
123 TK_M_KERNEL, /* val */
124 TK_M_DEVLINK, /* val */
126 TK_M_ENV, /* val, attr */
128 TK_M_SUBSYSTEM, /* val */
129 TK_M_DRIVER, /* val */
130 TK_M_WAITFOR, /* val */
131 TK_M_ATTR, /* val, attr */
132 TK_M_SYSCTL, /* val, attr */
135 TK_M_KERNELS, /* val */
136 TK_M_SUBSYSTEMS, /* val */
137 TK_M_DRIVERS, /* val */
138 TK_M_ATTRS, /* val, attr */
142 TK_M_TEST, /* val, mode_t */
143 TK_M_PROGRAM, /* val */
144 TK_M_IMPORT_FILE, /* val */
145 TK_M_IMPORT_PROG, /* val */
146 TK_M_IMPORT_BUILTIN, /* val */
147 TK_M_IMPORT_DB, /* val */
148 TK_M_IMPORT_CMDLINE, /* val */
149 TK_M_IMPORT_PARENT, /* val */
150 TK_M_RESULT, /* val */
153 TK_A_STRING_ESCAPE_NONE,
154 TK_A_STRING_ESCAPE_REPLACE,
156 TK_A_INOTIFY_WATCH, /* int */
157 TK_A_DEVLINK_PRIO, /* int */
158 TK_A_OWNER, /* val */
159 TK_A_GROUP, /* val */
161 TK_A_OWNER_ID, /* uid_t */
162 TK_A_GROUP_ID, /* gid_t */
163 TK_A_MODE_ID, /* mode_t */
165 TK_A_STATIC_NODE, /* val */
166 TK_A_SECLABEL, /* val, attr */
167 TK_A_ENV, /* val, attr */
169 TK_A_DEVLINK, /* val */
170 TK_A_ATTR, /* val, attr */
171 TK_A_SYSCTL, /* val, attr */
172 TK_A_RUN_BUILTIN, /* val, bool */
173 TK_A_RUN_PROGRAM, /* val, bool */
174 TK_A_GOTO, /* size_t */
179 /* we try to pack stuff in a way that we take only 12 bytes per token */
182 unsigned char type; /* same in rule and key */
184 enum token_type type:8;
186 bool has_static_node:1;
187 unsigned int unused:6;
188 unsigned short token_count;
189 unsigned int label_off;
190 unsigned short filename_off;
191 unsigned short filename_line;
194 enum token_type type:8;
195 enum operation_type op:8;
196 enum string_glob_type glob:8;
197 enum string_subst_type subst:4;
198 enum string_subst_type attrsubst:4;
199 unsigned int value_off;
201 unsigned int attr_off;
202 unsigned int rule_goto;
208 enum udev_builtin_cmd builtin_cmd;
216 struct udev_rules *rules;
218 struct token token[MAX_TK];
219 unsigned int token_cur;
223 static const char *operation_str(enum operation_type type) {
224 static const char *operation_strs[] = {
225 [OP_UNSET] = "UNSET",
226 [OP_MATCH] = "match",
227 [OP_NOMATCH] = "nomatch",
228 [OP_MATCH_MAX] = "MATCH_MAX",
231 [OP_REMOVE] = "remove",
232 [OP_ASSIGN] = "assign",
233 [OP_ASSIGN_FINAL] = "assign-final",
236 return operation_strs[type];
239 static const char *string_glob_str(enum string_glob_type type) {
240 static const char *string_glob_strs[] = {
241 [GL_UNSET] = "UNSET",
242 [GL_PLAIN] = "plain",
244 [GL_SPLIT] = "split",
245 [GL_SPLIT_GLOB] = "split-glob",
246 [GL_SOMETHING] = "split-glob",
249 return string_glob_strs[type];
252 static const char *token_str(enum token_type type) {
253 static const char *token_strs[] = {
254 [TK_UNSET] = "UNSET",
257 [TK_M_ACTION] = "M ACTION",
258 [TK_M_DEVPATH] = "M DEVPATH",
259 [TK_M_KERNEL] = "M KERNEL",
260 [TK_M_DEVLINK] = "M DEVLINK",
261 [TK_M_NAME] = "M NAME",
262 [TK_M_ENV] = "M ENV",
263 [TK_M_TAG] = "M TAG",
264 [TK_M_SUBSYSTEM] = "M SUBSYSTEM",
265 [TK_M_DRIVER] = "M DRIVER",
266 [TK_M_WAITFOR] = "M WAITFOR",
267 [TK_M_ATTR] = "M ATTR",
268 [TK_M_SYSCTL] = "M SYSCTL",
270 [TK_M_PARENTS_MIN] = "M PARENTS_MIN",
271 [TK_M_KERNELS] = "M KERNELS",
272 [TK_M_SUBSYSTEMS] = "M SUBSYSTEMS",
273 [TK_M_DRIVERS] = "M DRIVERS",
274 [TK_M_ATTRS] = "M ATTRS",
275 [TK_M_TAGS] = "M TAGS",
276 [TK_M_PARENTS_MAX] = "M PARENTS_MAX",
278 [TK_M_TEST] = "M TEST",
279 [TK_M_PROGRAM] = "M PROGRAM",
280 [TK_M_IMPORT_FILE] = "M IMPORT_FILE",
281 [TK_M_IMPORT_PROG] = "M IMPORT_PROG",
282 [TK_M_IMPORT_BUILTIN] = "M IMPORT_BUILTIN",
283 [TK_M_IMPORT_DB] = "M IMPORT_DB",
284 [TK_M_IMPORT_CMDLINE] = "M IMPORT_CMDLINE",
285 [TK_M_IMPORT_PARENT] = "M IMPORT_PARENT",
286 [TK_M_RESULT] = "M RESULT",
287 [TK_M_MAX] = "M MAX",
289 [TK_A_STRING_ESCAPE_NONE] = "A STRING_ESCAPE_NONE",
290 [TK_A_STRING_ESCAPE_REPLACE] = "A STRING_ESCAPE_REPLACE",
291 [TK_A_DB_PERSIST] = "A DB_PERSIST",
292 [TK_A_INOTIFY_WATCH] = "A INOTIFY_WATCH",
293 [TK_A_DEVLINK_PRIO] = "A DEVLINK_PRIO",
294 [TK_A_OWNER] = "A OWNER",
295 [TK_A_GROUP] = "A GROUP",
296 [TK_A_MODE] = "A MODE",
297 [TK_A_OWNER_ID] = "A OWNER_ID",
298 [TK_A_GROUP_ID] = "A GROUP_ID",
299 [TK_A_STATIC_NODE] = "A STATIC_NODE",
300 [TK_A_SECLABEL] = "A SECLABEL",
301 [TK_A_MODE_ID] = "A MODE_ID",
302 [TK_A_ENV] = "A ENV",
303 [TK_A_TAG] = "A ENV",
304 [TK_A_NAME] = "A NAME",
305 [TK_A_DEVLINK] = "A DEVLINK",
306 [TK_A_ATTR] = "A ATTR",
307 [TK_A_SYSCTL] = "A SYSCTL",
308 [TK_A_RUN_BUILTIN] = "A RUN_BUILTIN",
309 [TK_A_RUN_PROGRAM] = "A RUN_PROGRAM",
310 [TK_A_GOTO] = "A GOTO",
315 return token_strs[type];
318 static void dump_token(struct udev_rules *rules, struct token *token) {
319 enum token_type type = token->type;
320 enum operation_type op = token->key.op;
321 enum string_glob_type glob = token->key.glob;
322 const char *value = str(rules, token->key.value_off);
323 const char *attr = &rules->buf[token->key.attr_off];
328 const char *tks_ptr = (char *)rules->tokens;
329 const char *tk_ptr = (char *)token;
330 unsigned int idx = (tk_ptr - tks_ptr) / sizeof(struct token);
332 log_debug("* RULE %s:%u, token: %u, count: %u, label: '%s'",
333 &rules->buf[token->rule.filename_off], token->rule.filename_line,
334 idx, token->rule.token_count,
335 &rules->buf[token->rule.label_off]);
347 case TK_M_SUBSYSTEMS:
351 case TK_M_IMPORT_FILE:
352 case TK_M_IMPORT_PROG:
354 case TK_M_IMPORT_CMDLINE:
355 case TK_M_IMPORT_PARENT:
362 case TK_A_RUN_BUILTIN:
363 case TK_A_RUN_PROGRAM:
364 log_debug("%s %s '%s'(%s)",
365 token_str(type), operation_str(op), value, string_glob_str(glob));
367 case TK_M_IMPORT_BUILTIN:
368 log_debug("%s %i '%s'", token_str(type), token->key.builtin_cmd, value);
377 log_debug("%s %s '%s' '%s'(%s)",
378 token_str(type), operation_str(op), attr, value, string_glob_str(glob));
382 log_debug("%s %s '%s'", token_str(type), operation_str(op), value);
384 case TK_A_STRING_ESCAPE_NONE:
385 case TK_A_STRING_ESCAPE_REPLACE:
386 case TK_A_DB_PERSIST:
387 log_debug("%s", token_str(type));
390 log_debug("%s %s '%s'(%s) %#o",
391 token_str(type), operation_str(op), value, string_glob_str(glob), token->key.mode);
393 case TK_A_INOTIFY_WATCH:
394 log_debug("%s %u", token_str(type), token->key.watch);
396 case TK_A_DEVLINK_PRIO:
397 log_debug("%s %u", token_str(type), token->key.devlink_prio);
400 log_debug("%s %s %u", token_str(type), operation_str(op), token->key.uid);
403 log_debug("%s %s %u", token_str(type), operation_str(op), token->key.gid);
406 log_debug("%s %s %#o", token_str(type), operation_str(op), token->key.mode);
408 case TK_A_STATIC_NODE:
409 log_debug("%s '%s'", token_str(type), value);
412 log_debug("%s %s '%s' '%s'", token_str(type), operation_str(op), attr, value);
415 log_debug("%s '%s' %u", token_str(type), value, token->key.rule_goto);
418 log_debug("* %s", token_str(type));
420 case TK_M_PARENTS_MIN:
421 case TK_M_PARENTS_MAX:
424 log_debug("unknown type %u", type);
429 static void dump_rules(struct udev_rules *rules) {
432 log_debug("dumping %u (%zu bytes) tokens, %u (%zu bytes) strings",
434 rules->token_cur * sizeof(struct token),
437 for (i = 0; i < rules->token_cur; i++)
438 dump_token(rules, &rules->tokens[i]);
441 static inline void dump_token(struct udev_rules *rules, struct token *token) {}
442 static inline void dump_rules(struct udev_rules *rules) {}
445 static int add_token(struct udev_rules *rules, struct token *token) {
446 /* grow buffer if needed */
447 if (rules->token_cur+1 >= rules->token_max) {
448 struct token *tokens;
451 /* double the buffer size */
452 add = rules->token_max;
456 tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
459 rules->tokens = tokens;
460 rules->token_max += add;
462 memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
467 static uid_t add_uid(struct udev_rules *rules, const char *owner) {
473 /* lookup, if we know it already */
474 for (i = 0; i < rules->uids_cur; i++) {
475 off = rules->uids[i].name_off;
476 if (streq(rules_str(rules, off), owner)) {
477 uid = rules->uids[i].uid;
481 r = get_user_creds(&owner, &uid, NULL, NULL, NULL);
483 if (r == -ENOENT || r == -ESRCH)
484 log_error("specified user '%s' unknown", owner);
486 log_error_errno(r, "error resolving user '%s': %m", owner);
489 /* grow buffer if needed */
490 if (rules->uids_cur+1 >= rules->uids_max) {
491 struct uid_gid *uids;
494 /* double the buffer size */
495 add = rules->uids_max;
499 uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
503 rules->uids_max += add;
505 rules->uids[rules->uids_cur].uid = uid;
506 off = rules_add_string(rules, owner);
509 rules->uids[rules->uids_cur].name_off = off;
514 static gid_t add_gid(struct udev_rules *rules, const char *group) {
520 /* lookup, if we know it already */
521 for (i = 0; i < rules->gids_cur; i++) {
522 off = rules->gids[i].name_off;
523 if (streq(rules_str(rules, off), group)) {
524 gid = rules->gids[i].gid;
528 r = get_group_creds(&group, &gid);
530 if (r == -ENOENT || r == -ESRCH)
531 log_error("specified group '%s' unknown", group);
533 log_error_errno(r, "error resolving group '%s': %m", group);
536 /* grow buffer if needed */
537 if (rules->gids_cur+1 >= rules->gids_max) {
538 struct uid_gid *gids;
541 /* double the buffer size */
542 add = rules->gids_max;
546 gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid));
550 rules->gids_max += add;
552 rules->gids[rules->gids_cur].gid = gid;
553 off = rules_add_string(rules, group);
556 rules->gids[rules->gids_cur].name_off = off;
561 static int import_property_from_string(struct udev_device *dev, char *line) {
568 while (isspace(key[0]))
571 /* comment or empty line */
572 if (key[0] == '#' || key[0] == '\0')
575 /* split key/value */
576 val = strchr(key, '=');
583 while (isspace(val[0]))
590 while (isspace(key[len-1]))
594 /* terminate value */
598 while (isspace(val[len-1]))
606 if (val[0] == '"' || val[0] == '\'') {
607 if (val[len-1] != val[0]) {
608 log_debug("inconsistent quoting: '%s', skip", line);
615 udev_device_add_property(dev, key, val);
620 static int import_file_into_properties(struct udev_device *dev, const char *filename) {
622 char line[UTIL_LINE_SIZE];
624 f = fopen(filename, "re");
627 while (fgets(line, sizeof(line), f) != NULL)
628 import_property_from_string(dev, line);
633 static int import_program_into_properties(struct udev_event *event,
635 usec_t timeout_warn_usec,
636 const char *program, const sigset_t *sigmask) {
637 struct udev_device *dev = event->dev;
639 char result[UTIL_LINE_SIZE];
643 envp = udev_device_get_properties_envp(dev);
644 err = udev_event_spawn(event, timeout_usec, timeout_warn_usec, program, envp, sigmask, result, sizeof(result));
649 while (line != NULL) {
652 pos = strchr(line, '\n');
657 import_property_from_string(dev, line);
663 static int import_parent_into_properties(struct udev_device *dev, const char *filter) {
664 struct udev_device *dev_parent;
665 struct udev_list_entry *list_entry;
667 dev_parent = udev_device_get_parent(dev);
668 if (dev_parent == NULL)
671 udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
672 const char *key = udev_list_entry_get_name(list_entry);
673 const char *val = udev_list_entry_get_value(list_entry);
675 if (fnmatch(filter, key, 0) == 0) {
676 udev_device_add_property(dev, key, val);
682 #define WAIT_LOOP_PER_SECOND 50
683 static int wait_for_file(struct udev_device *dev, const char *file, int timeout) {
684 char filepath[UTIL_PATH_SIZE];
685 char devicepath[UTIL_PATH_SIZE];
687 int loop = timeout * WAIT_LOOP_PER_SECOND;
689 /* a relative path is a device attribute */
690 devicepath[0] = '\0';
691 if (file[0] != '/') {
692 strscpyl(devicepath, sizeof(devicepath), udev_device_get_syspath(dev), NULL);
693 strscpyl(filepath, sizeof(filepath), devicepath, "/", file, NULL);
698 const struct timespec duration = { 0, 1000 * 1000 * 1000 / WAIT_LOOP_PER_SECOND };
701 if (stat(file, &stats) == 0) {
702 log_debug("file '%s' appeared after %i loops", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
705 /* make sure, the device did not disappear in the meantime */
706 if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
707 log_debug("device disappeared while waiting for '%s'", file);
710 log_debug("wait for '%s' for %i mseconds", file, 1000 / WAIT_LOOP_PER_SECOND);
711 nanosleep(&duration, NULL);
713 log_debug("waiting for '%s' failed", file);
717 static int attr_subst_subdir(char *attr, size_t len) {
720 if (strstr(attr, "/*/")) {
722 char dirname[UTIL_PATH_SIZE];
726 strscpy(dirname, sizeof(dirname), attr);
727 pos = strstr(dirname, "/*/");
732 dir = opendir(dirname);
736 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
739 if (dent->d_name[0] == '.')
741 strscpyl(attr, len, dirname, "/", dent->d_name, tail, NULL);
742 if (stat(attr, &stats) == 0) {
754 static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value) {
759 if (linepos == NULL || linepos[0] == '\0')
762 /* skip whitespace */
763 while (isspace(linepos[0]) || linepos[0] == ',')
767 if (linepos[0] == '\0')
773 if (linepos[0] == '\0')
775 if (isspace(linepos[0]))
777 if (linepos[0] == '=')
779 if ((linepos[0] == '+') || (linepos[0] == '-') || (linepos[0] == '!') || (linepos[0] == ':'))
780 if (linepos[1] == '=')
784 /* remember end of key */
787 /* skip whitespace after key */
788 while (isspace(linepos[0]))
790 if (linepos[0] == '\0')
793 /* get operation type */
794 if (linepos[0] == '=' && linepos[1] == '=') {
797 } else if (linepos[0] == '!' && linepos[1] == '=') {
800 } else if (linepos[0] == '+' && linepos[1] == '=') {
803 } else if (linepos[0] == '-' && linepos[1] == '=') {
806 } else if (linepos[0] == '=') {
809 } else if (linepos[0] == ':' && linepos[1] == '=') {
810 *op = OP_ASSIGN_FINAL;
818 /* skip whitespace after operator */
819 while (isspace(linepos[0]))
821 if (linepos[0] == '\0')
825 if (linepos[0] == '"')
832 temp = strchr(linepos, '"');
838 /* move line to next key */
843 /* extract possible KEY{attr} */
844 static const char *get_key_attribute(struct udev *udev, char *str) {
848 attr = strchr(str, '{');
851 pos = strchr(attr, '}');
853 log_error("missing closing brace for format");
862 static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
863 enum operation_type op,
864 const char *value, const void *data) {
865 struct token *token = &rule_tmp->token[rule_tmp->token_cur];
866 const char *attr = NULL;
868 memzero(token, sizeof(struct token));
880 case TK_M_SUBSYSTEMS:
884 case TK_M_IMPORT_FILE:
885 case TK_M_IMPORT_PROG:
887 case TK_M_IMPORT_CMDLINE:
888 case TK_M_IMPORT_PARENT:
898 case TK_A_STATIC_NODE:
899 token->key.value_off = rules_add_string(rule_tmp->rules, value);
901 case TK_M_IMPORT_BUILTIN:
902 token->key.value_off = rules_add_string(rule_tmp->rules, value);
903 token->key.builtin_cmd = *(enum udev_builtin_cmd *)data;
914 token->key.value_off = rules_add_string(rule_tmp->rules, value);
915 token->key.attr_off = rules_add_string(rule_tmp->rules, attr);
918 token->key.value_off = rules_add_string(rule_tmp->rules, value);
920 token->key.mode = *(mode_t *)data;
922 case TK_A_STRING_ESCAPE_NONE:
923 case TK_A_STRING_ESCAPE_REPLACE:
924 case TK_A_DB_PERSIST:
926 case TK_A_RUN_BUILTIN:
927 case TK_A_RUN_PROGRAM:
928 token->key.builtin_cmd = *(enum udev_builtin_cmd *)data;
929 token->key.value_off = rules_add_string(rule_tmp->rules, value);
931 case TK_A_INOTIFY_WATCH:
932 case TK_A_DEVLINK_PRIO:
933 token->key.devlink_prio = *(int *)data;
936 token->key.uid = *(uid_t *)data;
939 token->key.gid = *(gid_t *)data;
942 token->key.mode = *(mode_t *)data;
945 case TK_M_PARENTS_MIN:
946 case TK_M_PARENTS_MAX:
950 log_error("wrong type %u", type);
954 if (value != NULL && type < TK_M_MAX) {
955 /* check if we need to split or call fnmatch() while matching rules */
956 enum string_glob_type glob;
960 has_split = (strchr(value, '|') != NULL);
961 has_glob = string_is_glob(value);
962 if (has_split && has_glob) {
963 glob = GL_SPLIT_GLOB;
964 } else if (has_split) {
966 } else if (has_glob) {
967 if (streq(value, "?*"))
974 token->key.glob = glob;
977 if (value != NULL && type > TK_M_MAX) {
978 /* check if assigned value has substitution chars */
980 token->key.subst = SB_SUBSYS;
981 else if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
982 token->key.subst = SB_FORMAT;
984 token->key.subst = SB_NONE;
988 /* check if property/attribute name has substitution chars */
990 token->key.attrsubst = SB_SUBSYS;
991 else if (strchr(attr, '%') != NULL || strchr(attr, '$') != NULL)
992 token->key.attrsubst = SB_FORMAT;
994 token->key.attrsubst = SB_NONE;
997 token->key.type = type;
999 rule_tmp->token_cur++;
1000 if (rule_tmp->token_cur >= ELEMENTSOF(rule_tmp->token)) {
1001 log_error("temporary rule array too small");
1007 static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp) {
1009 unsigned int start = 0;
1010 unsigned int end = rule_tmp->token_cur;
1012 for (i = 0; i < rule_tmp->token_cur; i++) {
1013 enum token_type next_val = TK_UNSET;
1014 unsigned int next_idx = 0;
1017 /* find smallest value */
1018 for (j = start; j < end; j++) {
1019 if (rule_tmp->token[j].type == TK_UNSET)
1021 if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
1022 next_val = rule_tmp->token[j].type;
1027 /* add token and mark done */
1028 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
1030 rule_tmp->token[next_idx].type = TK_UNSET;
1033 if (next_idx == start)
1035 if (next_idx+1 == end)
1041 static int add_rule(struct udev_rules *rules, char *line,
1042 const char *filename, unsigned int filename_off, unsigned int lineno) {
1045 struct rule_tmp rule_tmp = {
1047 .rule.type = TK_RULE,
1050 /* the offset in the rule is limited to unsigned short */
1051 if (filename_off < USHRT_MAX)
1052 rule_tmp.rule.rule.filename_off = filename_off;
1053 rule_tmp.rule.rule.filename_line = lineno;
1059 enum operation_type op;
1061 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0) {
1062 /* Avoid erroring on trailing whitespace. This is probably rare
1063 * so save the work for the error case instead of always trying
1064 * to strip the trailing whitespace with strstrip(). */
1065 while (isblank(*linepos))
1068 /* If we aren't at the end of the line, this is a parsing error.
1069 * Make a best effort to describe where the problem is. */
1070 if (!strchr(NEWLINE, *linepos)) {
1071 char buf[2] = {*linepos};
1072 _cleanup_free_ char *tmp;
1075 log_error("invalid key/value pair in file %s on line %u, starting at character %tu ('%s')",
1076 filename, lineno, linepos - line + 1, tmp);
1077 if (*linepos == '#')
1078 log_error("hint: comments can only start at beginning of line");
1083 if (streq(key, "ACTION")) {
1084 if (op > OP_MATCH_MAX) {
1085 log_error("invalid ACTION operation");
1088 rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL);
1092 if (streq(key, "DEVPATH")) {
1093 if (op > OP_MATCH_MAX) {
1094 log_error("invalid DEVPATH operation");
1097 rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
1101 if (streq(key, "KERNEL")) {
1102 if (op > OP_MATCH_MAX) {
1103 log_error("invalid KERNEL operation");
1106 rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL);
1110 if (streq(key, "SUBSYSTEM")) {
1111 if (op > OP_MATCH_MAX) {
1112 log_error("invalid SUBSYSTEM operation");
1115 /* bus, class, subsystem events should all be the same */
1116 if (streq(value, "subsystem") ||
1117 streq(value, "bus") ||
1118 streq(value, "class")) {
1119 if (streq(value, "bus") || streq(value, "class"))
1120 log_error("'%s' must be specified as 'subsystem' "
1121 "please fix it in %s:%u", value, filename, lineno);
1122 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
1124 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
1128 if (streq(key, "DRIVER")) {
1129 if (op > OP_MATCH_MAX) {
1130 log_error("invalid DRIVER operation");
1133 rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL);
1137 if (startswith(key, "ATTR{")) {
1138 attr = get_key_attribute(rules->udev, key + strlen("ATTR"));
1140 log_error("error parsing ATTR attribute");
1143 if (op == OP_REMOVE) {
1144 log_error("invalid ATTR operation");
1147 if (op < OP_MATCH_MAX)
1148 rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
1150 rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr);
1154 if (startswith(key, "SYSCTL{")) {
1155 attr = get_key_attribute(rules->udev, key + strlen("SYSCTL"));
1157 log_error("error parsing SYSCTL attribute");
1160 if (op == OP_REMOVE) {
1161 log_error("invalid SYSCTL operation");
1164 if (op < OP_MATCH_MAX)
1165 rule_add_key(&rule_tmp, TK_M_SYSCTL, op, value, attr);
1167 rule_add_key(&rule_tmp, TK_A_SYSCTL, op, value, attr);
1171 if (startswith(key, "SECLABEL{")) {
1172 attr = get_key_attribute(rules->udev, key + strlen("SECLABEL"));
1174 log_error("error parsing SECLABEL attribute");
1177 if (op == OP_REMOVE) {
1178 log_error("invalid SECLABEL operation");
1182 rule_add_key(&rule_tmp, TK_A_SECLABEL, op, value, attr);
1186 if (streq(key, "KERNELS")) {
1187 if (op > OP_MATCH_MAX) {
1188 log_error("invalid KERNELS operation");
1191 rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1195 if (streq(key, "SUBSYSTEMS")) {
1196 if (op > OP_MATCH_MAX) {
1197 log_error("invalid SUBSYSTEMS operation");
1200 rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1204 if (streq(key, "DRIVERS")) {
1205 if (op > OP_MATCH_MAX) {
1206 log_error("invalid DRIVERS operation");
1209 rule_add_key(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
1213 if (startswith(key, "ATTRS{")) {
1214 if (op > OP_MATCH_MAX) {
1215 log_error("invalid ATTRS operation");
1218 attr = get_key_attribute(rules->udev, key + strlen("ATTRS"));
1220 log_error("error parsing ATTRS attribute");
1223 if (startswith(attr, "device/"))
1224 log_error("the 'device' link may not be available in a future kernel, "
1225 "please fix it in %s:%u", filename, lineno);
1226 else if (strstr(attr, "../") != NULL)
1227 log_error("do not reference parent sysfs directories directly, "
1228 "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
1229 rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1233 if (streq(key, "TAGS")) {
1234 if (op > OP_MATCH_MAX) {
1235 log_error("invalid TAGS operation");
1238 rule_add_key(&rule_tmp, TK_M_TAGS, op, value, NULL);
1242 if (startswith(key, "ENV{")) {
1243 attr = get_key_attribute(rules->udev, key + strlen("ENV"));
1245 log_error("error parsing ENV attribute");
1248 if (op == OP_REMOVE) {
1249 log_error("invalid ENV operation");
1252 if (op < OP_MATCH_MAX) {
1253 if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
1256 static const char *blacklist[] = {
1271 for (i = 0; i < ELEMENTSOF(blacklist); i++) {
1272 if (!streq(attr, blacklist[i]))
1274 log_error("invalid ENV attribute, '%s' can not be set %s:%u", attr, filename, lineno);
1277 if (rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
1283 if (streq(key, "TAG")) {
1284 if (op < OP_MATCH_MAX)
1285 rule_add_key(&rule_tmp, TK_M_TAG, op, value, NULL);
1287 rule_add_key(&rule_tmp, TK_A_TAG, op, value, NULL);
1291 if (streq(key, "PROGRAM")) {
1292 if (op == OP_REMOVE) {
1293 log_error("invalid PROGRAM operation");
1296 rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
1300 if (streq(key, "RESULT")) {
1301 if (op > OP_MATCH_MAX) {
1302 log_error("invalid RESULT operation");
1305 rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL);
1309 if (startswith(key, "IMPORT")) {
1310 attr = get_key_attribute(rules->udev, key + strlen("IMPORT"));
1312 log_error("IMPORT{} type missing, ignoring IMPORT %s:%u", filename, lineno);
1315 if (op == OP_REMOVE) {
1316 log_error("invalid IMPORT operation");
1319 if (streq(attr, "program")) {
1320 /* find known built-in command */
1321 if (value[0] != '/') {
1322 enum udev_builtin_cmd cmd;
1324 cmd = udev_builtin_lookup(value);
1325 if (cmd < UDEV_BUILTIN_MAX) {
1326 log_debug("IMPORT found builtin '%s', replacing %s:%u",
1327 value, filename, lineno);
1328 rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, value, &cmd);
1332 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1333 } else if (streq(attr, "builtin")) {
1334 enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
1336 if (cmd < UDEV_BUILTIN_MAX)
1337 rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, value, &cmd);
1339 log_error("IMPORT{builtin}: '%s' unknown %s:%u", value, filename, lineno);
1340 } else if (streq(attr, "file")) {
1341 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1342 } else if (streq(attr, "db")) {
1343 rule_add_key(&rule_tmp, TK_M_IMPORT_DB, op, value, NULL);
1344 } else if (streq(attr, "cmdline")) {
1345 rule_add_key(&rule_tmp, TK_M_IMPORT_CMDLINE, op, value, NULL);
1346 } else if (streq(attr, "parent")) {
1347 rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
1349 log_error("IMPORT{} unknown type, ignoring IMPORT %s:%u", filename, lineno);
1353 if (startswith(key, "TEST")) {
1356 if (op > OP_MATCH_MAX) {
1357 log_error("invalid TEST operation");
1360 attr = get_key_attribute(rules->udev, key + strlen("TEST"));
1362 mode = strtol(attr, NULL, 8);
1363 rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode);
1365 rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL);
1370 if (startswith(key, "RUN")) {
1371 attr = get_key_attribute(rules->udev, key + strlen("RUN"));
1374 if (op == OP_REMOVE) {
1375 log_error("invalid RUN operation");
1379 if (streq(attr, "builtin")) {
1380 enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
1382 if (cmd < UDEV_BUILTIN_MAX)
1383 rule_add_key(&rule_tmp, TK_A_RUN_BUILTIN, op, value, &cmd);
1385 log_error("RUN{builtin}: '%s' unknown %s:%u", value, filename, lineno);
1386 } else if (streq(attr, "program")) {
1387 enum udev_builtin_cmd cmd = UDEV_BUILTIN_MAX;
1389 rule_add_key(&rule_tmp, TK_A_RUN_PROGRAM, op, value, &cmd);
1391 log_error("RUN{} unknown type, ignoring RUN %s:%u", filename, lineno);
1397 if (streq(key, "WAIT_FOR") || streq(key, "WAIT_FOR_SYSFS")) {
1398 if (op == OP_REMOVE) {
1399 log_error("invalid WAIT_FOR/WAIT_FOR_SYSFS operation");
1402 rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1406 if (streq(key, "LABEL")) {
1407 if (op == OP_REMOVE) {
1408 log_error("invalid LABEL operation");
1411 rule_tmp.rule.rule.label_off = rules_add_string(rules, value);
1415 if (streq(key, "GOTO")) {
1416 if (op == OP_REMOVE) {
1417 log_error("invalid GOTO operation");
1420 rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1424 if (startswith(key, "NAME")) {
1425 if (op == OP_REMOVE) {
1426 log_error("invalid NAME operation");
1429 if (op < OP_MATCH_MAX) {
1430 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
1432 if (streq(value, "%k")) {
1433 log_error("NAME=\"%%k\" is ignored, because it breaks kernel supplied names, "
1434 "please remove it from %s:%u\n", filename, lineno);
1437 if (value[0] == '\0') {
1438 log_debug("NAME=\"\" is ignored, because udev will not delete any device nodes, "
1439 "please remove it from %s:%u\n", filename, lineno);
1442 rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL);
1444 rule_tmp.rule.rule.can_set_name = true;
1448 if (streq(key, "SYMLINK")) {
1449 if (op == OP_REMOVE) {
1450 log_error("invalid SYMLINK operation");
1453 if (op < OP_MATCH_MAX)
1454 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
1456 rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, NULL);
1457 rule_tmp.rule.rule.can_set_name = true;
1461 if (streq(key, "OWNER")) {
1465 if (op == OP_REMOVE) {
1466 log_error("invalid OWNER operation");
1470 uid = strtoul(value, &endptr, 10);
1471 if (endptr[0] == '\0') {
1472 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1473 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1474 uid = add_uid(rules, value);
1475 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1476 } else if (rules->resolve_names >= 0) {
1477 rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
1479 rule_tmp.rule.rule.can_set_name = true;
1483 if (streq(key, "GROUP")) {
1487 if (op == OP_REMOVE) {
1488 log_error("invalid GROUP operation");
1492 gid = strtoul(value, &endptr, 10);
1493 if (endptr[0] == '\0') {
1494 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1495 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1496 gid = add_gid(rules, value);
1497 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1498 } else if (rules->resolve_names >= 0) {
1499 rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
1501 rule_tmp.rule.rule.can_set_name = true;
1505 if (streq(key, "MODE")) {
1509 if (op == OP_REMOVE) {
1510 log_error("invalid MODE operation");
1514 mode = strtol(value, &endptr, 8);
1515 if (endptr[0] == '\0')
1516 rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1518 rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
1519 rule_tmp.rule.rule.can_set_name = true;
1523 if (streq(key, "OPTIONS")) {
1526 if (op == OP_REMOVE) {
1527 log_error("invalid OPTIONS operation");
1531 pos = strstr(value, "link_priority=");
1533 int prio = atoi(&pos[strlen("link_priority=")]);
1535 rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, op, NULL, &prio);
1538 pos = strstr(value, "string_escape=");
1540 pos = &pos[strlen("string_escape=")];
1541 if (startswith(pos, "none"))
1542 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, op, NULL, NULL);
1543 else if (startswith(pos, "replace"))
1544 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, op, NULL, NULL);
1547 pos = strstr(value, "db_persist");
1549 rule_add_key(&rule_tmp, TK_A_DB_PERSIST, op, NULL, NULL);
1551 pos = strstr(value, "nowatch");
1555 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &off);
1557 pos = strstr(value, "watch");
1561 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &on);
1565 pos = strstr(value, "static_node=");
1567 rule_add_key(&rule_tmp, TK_A_STATIC_NODE, op, &pos[strlen("static_node=")], NULL);
1568 rule_tmp.rule.rule.has_static_node = true;
1574 log_error("unknown key '%s' in %s:%u", key, filename, lineno);
1578 /* add rule token */
1579 rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur;
1580 if (add_token(rules, &rule_tmp.rule) != 0)
1583 /* add tokens to list, sorted by type */
1584 if (sort_token(rules, &rule_tmp) != 0)
1589 log_error("invalid rule '%s:%u'", filename, lineno);
1593 static int parse_file(struct udev_rules *rules, const char *filename) {
1594 _cleanup_fclose_ FILE *f = NULL;
1595 unsigned int first_token;
1596 unsigned int filename_off;
1597 char line[UTIL_LINE_SIZE];
1601 f = fopen(filename, "re");
1603 if (errno == ENOENT)
1609 if (null_or_empty_fd(fileno(f))) {
1610 log_debug("Skipping empty file: %s", filename);
1613 log_debug("Reading rules file: %s", filename);
1615 first_token = rules->token_cur;
1616 filename_off = rules_add_string(rules, filename);
1618 while (fgets(line, sizeof(line), f) != NULL) {
1622 /* skip whitespace */
1625 while (isspace(key[0]))
1636 /* continue reading if backslash+newline is found */
1637 while (line[len-2] == '\\') {
1638 if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1640 if (strlen(&line[len-2]) < 2)
1646 if (len+1 >= sizeof(line)) {
1647 log_error("line too long '%s':%u, ignored", filename, line_nr);
1650 add_rule(rules, key, filename, filename_off, line_nr);
1653 /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1654 for (i = first_token+1; i < rules->token_cur; i++) {
1655 if (rules->tokens[i].type == TK_A_GOTO) {
1656 char *label = rules_str(rules, rules->tokens[i].key.value_off);
1659 for (j = i+1; j < rules->token_cur; j++) {
1660 if (rules->tokens[j].type != TK_RULE)
1662 if (rules->tokens[j].rule.label_off == 0)
1664 if (!streq(label, rules_str(rules, rules->tokens[j].rule.label_off)))
1666 rules->tokens[i].key.rule_goto = j;
1669 if (rules->tokens[i].key.rule_goto == 0)
1670 log_error("GOTO '%s' has no matching label in: '%s'", label, filename);
1676 struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names) {
1677 struct udev_rules *rules;
1678 struct udev_list file_list;
1679 struct token end_token;
1683 rules = new0(struct udev_rules, 1);
1687 rules->resolve_names = resolve_names;
1688 udev_list_init(udev, &file_list, true);
1690 /* init token array and string buffer */
1691 rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
1692 if (rules->tokens == NULL)
1693 return udev_rules_unref(rules);
1694 rules->token_max = PREALLOC_TOKEN;
1696 rules->strbuf = strbuf_new();
1698 return udev_rules_unref(rules);
1700 udev_rules_check_timestamp(rules);
1702 r = conf_files_list_strv(&files, ".rules", NULL, rules_dirs);
1704 log_error_errno(r, "failed to enumerate rules files: %m");
1705 return udev_rules_unref(rules);
1709 * The offset value in the rules strct is limited; add all
1710 * rules file names to the beginning of the string buffer.
1712 STRV_FOREACH(f, files)
1713 rules_add_string(rules, *f);
1715 STRV_FOREACH(f, files)
1716 parse_file(rules, *f);
1720 memzero(&end_token, sizeof(struct token));
1721 end_token.type = TK_END;
1722 add_token(rules, &end_token);
1723 log_debug("rules contain %zu bytes tokens (%u * %zu bytes), %zu bytes strings",
1724 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->strbuf->len);
1726 /* cleanup temporary strbuf data */
1727 log_debug("%zu strings (%zu bytes), %zu de-duplicated (%zu bytes), %zu trie nodes used",
1728 rules->strbuf->in_count, rules->strbuf->in_len,
1729 rules->strbuf->dedup_count, rules->strbuf->dedup_len, rules->strbuf->nodes_count);
1730 strbuf_complete(rules->strbuf);
1732 /* cleanup uid/gid cache */
1735 rules->uids_cur = 0;
1736 rules->uids_max = 0;
1739 rules->gids_cur = 0;
1740 rules->gids_max = 0;
1746 struct udev_rules *udev_rules_unref(struct udev_rules *rules) {
1749 free(rules->tokens);
1750 strbuf_cleanup(rules->strbuf);
1757 bool udev_rules_check_timestamp(struct udev_rules *rules) {
1761 return paths_check_timestamp(rules_dirs, &rules->dirs_ts_usec, true);
1764 static int match_key(struct udev_rules *rules, struct token *token, const char *val) {
1765 char *key_value = rules_str(rules, token->key.value_off);
1772 switch (token->key.glob) {
1774 match = (streq(key_value, val));
1777 match = (fnmatch(key_value, val, 0) == 0);
1784 s = rules_str(rules, token->key.value_off);
1789 next = strchr(s, '|');
1791 size_t matchlen = (size_t)(next - s);
1793 match = (matchlen == len && strneq(s, val, matchlen));
1797 match = (streq(s, val));
1806 char value[UTIL_PATH_SIZE];
1808 strscpy(value, sizeof(value), rules_str(rules, token->key.value_off));
1810 while (key_value != NULL) {
1811 pos = strchr(key_value, '|');
1816 match = (fnmatch(key_value, val, 0) == 0);
1824 match = (val[0] != '\0');
1830 if (match && (token->key.op == OP_MATCH))
1832 if (!match && (token->key.op == OP_NOMATCH))
1837 static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur) {
1839 char nbuf[UTIL_NAME_SIZE];
1841 char vbuf[UTIL_NAME_SIZE];
1844 name = rules_str(rules, cur->key.attr_off);
1845 switch (cur->key.attrsubst) {
1847 udev_event_apply_format(event, name, nbuf, sizeof(nbuf));
1851 value = udev_device_get_sysattr_value(dev, name);
1856 if (util_resolve_subsys_kernel(event->udev, name, vbuf, sizeof(vbuf), 1) != 0)
1864 /* remove trailing whitespace, if not asked to match for it */
1865 len = strlen(value);
1866 if (len > 0 && isspace(value[len-1])) {
1867 const char *key_value;
1870 key_value = rules_str(rules, cur->key.value_off);
1871 klen = strlen(key_value);
1872 if (klen > 0 && !isspace(key_value[klen-1])) {
1873 if (value != vbuf) {
1874 strscpy(vbuf, sizeof(vbuf), value);
1877 while (len > 0 && isspace(vbuf[--len]))
1882 return match_key(rules, cur, value);
1891 int udev_rules_apply_to_event(struct udev_rules *rules,
1892 struct udev_event *event,
1893 usec_t timeout_usec,
1894 usec_t timeout_warn_usec,
1895 struct udev_list *properties_list,
1896 const sigset_t *sigmask) {
1899 enum escape_type esc = ESCAPE_UNSET;
1902 if (rules->tokens == NULL)
1905 can_set_name = ((!streq(udev_device_get_action(event->dev), "remove")) &&
1906 (major(udev_device_get_devnum(event->dev)) > 0 ||
1907 udev_device_get_ifindex(event->dev) > 0));
1909 /* loop through token list, match, run actions or forward to next rule */
1910 cur = &rules->tokens[0];
1913 dump_token(rules, cur);
1914 switch (cur->type) {
1918 /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
1919 if (!can_set_name && rule->rule.can_set_name)
1924 if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
1928 if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
1932 if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
1935 case TK_M_DEVLINK: {
1936 struct udev_list_entry *list_entry;
1939 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
1940 const char *devlink;
1942 devlink = udev_list_entry_get_name(list_entry) + strlen("/dev/");
1943 if (match_key(rules, cur, devlink) == 0) {
1953 if (match_key(rules, cur, event->name) != 0)
1957 const char *key_name = rules_str(rules, cur->key.attr_off);
1960 value = udev_device_get_property_value(event->dev, key_name);
1962 /* check global properties */
1963 if (!value && properties_list) {
1964 struct udev_list_entry *list_entry;
1966 list_entry = udev_list_get_entry(properties_list);
1967 list_entry = udev_list_entry_get_by_name(list_entry, key_name);
1968 if (list_entry != NULL)
1969 value = udev_list_entry_get_value(list_entry);
1974 if (match_key(rules, cur, value))
1979 struct udev_list_entry *list_entry;
1982 udev_list_entry_foreach(list_entry, udev_device_get_tags_list_entry(event->dev)) {
1983 if (streq(rules_str(rules, cur->key.value_off), udev_list_entry_get_name(list_entry))) {
1988 if (!match && (cur->key.op != OP_NOMATCH))
1992 case TK_M_SUBSYSTEM:
1993 if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
1997 if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
2000 case TK_M_WAITFOR: {
2001 char filename[UTIL_PATH_SIZE];
2004 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), filename, sizeof(filename));
2005 found = (wait_for_file(event->dev, filename, 10) == 0);
2006 if (!found && (cur->key.op != OP_NOMATCH))
2011 if (match_attr(rules, event->dev, event, cur) != 0)
2015 char filename[UTIL_PATH_SIZE];
2016 _cleanup_free_ char *value = NULL;
2019 udev_event_apply_format(event, rules_str(rules, cur->key.attr_off), filename, sizeof(filename));
2020 sysctl_normalize(filename);
2021 if (sysctl_read(filename, &value) < 0)
2024 len = strlen(value);
2025 while (len > 0 && isspace(value[--len]))
2027 if (match_key(rules, cur, value) != 0)
2032 case TK_M_SUBSYSTEMS:
2038 /* get whole sequence of parent matches */
2040 while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX)
2043 /* loop over parents */
2044 event->dev_parent = event->dev;
2048 /* loop over sequence of parent match keys */
2049 for (key = cur; key < next; key++ ) {
2050 dump_token(rules, key);
2053 if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
2056 case TK_M_SUBSYSTEMS:
2057 if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
2061 if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
2065 if (match_attr(rules, event->dev_parent, event, key) != 0)
2069 bool match = udev_device_has_tag(event->dev_parent, rules_str(rules, cur->key.value_off));
2071 if (match && key->key.op == OP_NOMATCH)
2073 if (!match && key->key.op == OP_MATCH)
2084 event->dev_parent = udev_device_get_parent(event->dev_parent);
2085 if (event->dev_parent == NULL)
2088 /* move behind our sequence of parent match keys */
2093 char filename[UTIL_PATH_SIZE];
2094 struct stat statbuf;
2097 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), filename, sizeof(filename));
2098 if (util_resolve_subsys_kernel(event->udev, filename, filename, sizeof(filename), 0) != 0) {
2099 if (filename[0] != '/') {
2100 char tmp[UTIL_PATH_SIZE];
2102 strscpy(tmp, sizeof(tmp), filename);
2103 strscpyl(filename, sizeof(filename),
2104 udev_device_get_syspath(event->dev), "/", tmp, NULL);
2107 attr_subst_subdir(filename, sizeof(filename));
2109 match = (stat(filename, &statbuf) == 0);
2110 if (match && cur->key.mode > 0)
2111 match = ((statbuf.st_mode & cur->key.mode) > 0);
2112 if (match && cur->key.op == OP_NOMATCH)
2114 if (!match && cur->key.op == OP_MATCH)
2118 case TK_M_PROGRAM: {
2119 char program[UTIL_PATH_SIZE];
2121 char result[UTIL_LINE_SIZE];
2123 free(event->program_result);
2124 event->program_result = NULL;
2125 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), program, sizeof(program));
2126 envp = udev_device_get_properties_envp(event->dev);
2127 log_debug("PROGRAM '%s' %s:%u",
2129 rules_str(rules, rule->rule.filename_off),
2130 rule->rule.filename_line);
2132 if (udev_event_spawn(event, timeout_usec, timeout_warn_usec, program, envp, sigmask, result, sizeof(result)) < 0) {
2133 if (cur->key.op != OP_NOMATCH)
2138 util_remove_trailing_chars(result, '\n');
2139 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2140 count = util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
2142 log_debug("%i character(s) replaced" , count);
2144 event->program_result = strdup(result);
2145 if (cur->key.op == OP_NOMATCH)
2150 case TK_M_IMPORT_FILE: {
2151 char import[UTIL_PATH_SIZE];
2153 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), import, sizeof(import));
2154 if (import_file_into_properties(event->dev, import) != 0)
2155 if (cur->key.op != OP_NOMATCH)
2159 case TK_M_IMPORT_PROG: {
2160 char import[UTIL_PATH_SIZE];
2162 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), import, sizeof(import));
2163 log_debug("IMPORT '%s' %s:%u",
2165 rules_str(rules, rule->rule.filename_off),
2166 rule->rule.filename_line);
2168 if (import_program_into_properties(event, timeout_usec, timeout_warn_usec, import, sigmask) != 0)
2169 if (cur->key.op != OP_NOMATCH)
2173 case TK_M_IMPORT_BUILTIN: {
2174 char command[UTIL_PATH_SIZE];
2176 if (udev_builtin_run_once(cur->key.builtin_cmd)) {
2177 /* check if we ran already */
2178 if (event->builtin_run & (1 << cur->key.builtin_cmd)) {
2179 log_debug("IMPORT builtin skip '%s' %s:%u",
2180 udev_builtin_name(cur->key.builtin_cmd),
2181 rules_str(rules, rule->rule.filename_off),
2182 rule->rule.filename_line);
2183 /* return the result from earlier run */
2184 if (event->builtin_ret & (1 << cur->key.builtin_cmd))
2185 if (cur->key.op != OP_NOMATCH)
2190 event->builtin_run |= (1 << cur->key.builtin_cmd);
2193 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), command, sizeof(command));
2194 log_debug("IMPORT builtin '%s' %s:%u",
2195 udev_builtin_name(cur->key.builtin_cmd),
2196 rules_str(rules, rule->rule.filename_off),
2197 rule->rule.filename_line);
2199 if (udev_builtin_run(event->dev, cur->key.builtin_cmd, command, false) != 0) {
2200 /* remember failure */
2201 log_debug("IMPORT builtin '%s' returned non-zero",
2202 udev_builtin_name(cur->key.builtin_cmd));
2203 event->builtin_ret |= (1 << cur->key.builtin_cmd);
2204 if (cur->key.op != OP_NOMATCH)
2209 case TK_M_IMPORT_DB: {
2210 const char *key = rules_str(rules, cur->key.value_off);
2213 value = udev_device_get_property_value(event->dev_db, key);
2215 udev_device_add_property(event->dev, key, value);
2217 if (cur->key.op != OP_NOMATCH)
2222 case TK_M_IMPORT_CMDLINE: {
2224 bool imported = false;
2226 f = fopen("/proc/cmdline", "re");
2230 if (fgets(cmdline, sizeof(cmdline), f) != NULL) {
2231 const char *key = rules_str(rules, cur->key.value_off);
2234 pos = strstr(cmdline, key);
2237 if (pos[0] == '\0' || isspace(pos[0])) {
2238 /* we import simple flags as 'FLAG=1' */
2239 udev_device_add_property(event->dev, key, "1");
2241 } else if (pos[0] == '=') {
2246 while (pos[0] != '\0' && !isspace(pos[0]))
2249 udev_device_add_property(event->dev, key, value);
2256 if (!imported && cur->key.op != OP_NOMATCH)
2260 case TK_M_IMPORT_PARENT: {
2261 char import[UTIL_PATH_SIZE];
2263 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), import, sizeof(import));
2264 if (import_parent_into_properties(event->dev, import) != 0)
2265 if (cur->key.op != OP_NOMATCH)
2270 if (match_key(rules, cur, event->program_result) != 0)
2273 case TK_A_STRING_ESCAPE_NONE:
2276 case TK_A_STRING_ESCAPE_REPLACE:
2277 esc = ESCAPE_REPLACE;
2279 case TK_A_DB_PERSIST:
2280 udev_device_set_db_persist(event->dev);
2282 case TK_A_INOTIFY_WATCH:
2283 if (event->inotify_watch_final)
2285 if (cur->key.op == OP_ASSIGN_FINAL)
2286 event->inotify_watch_final = true;
2287 event->inotify_watch = cur->key.watch;
2289 case TK_A_DEVLINK_PRIO:
2290 udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
2293 char owner[UTIL_NAME_SIZE];
2294 const char *ow = owner;
2297 if (event->owner_final)
2299 if (cur->key.op == OP_ASSIGN_FINAL)
2300 event->owner_final = true;
2301 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), owner, sizeof(owner));
2302 event->owner_set = true;
2303 r = get_user_creds(&ow, &event->uid, NULL, NULL, NULL);
2305 if (r == -ENOENT || r == -ESRCH)
2306 log_error("specified user '%s' unknown", owner);
2308 log_error_errno(r, "error resolving user '%s': %m", owner);
2312 log_debug("OWNER %u %s:%u",
2314 rules_str(rules, rule->rule.filename_off),
2315 rule->rule.filename_line);
2319 char group[UTIL_NAME_SIZE];
2320 const char *gr = group;
2323 if (event->group_final)
2325 if (cur->key.op == OP_ASSIGN_FINAL)
2326 event->group_final = true;
2327 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), group, sizeof(group));
2328 event->group_set = true;
2329 r = get_group_creds(&gr, &event->gid);
2331 if (r == -ENOENT || r == -ESRCH)
2332 log_error("specified group '%s' unknown", group);
2334 log_error_errno(r, "error resolving group '%s': %m", group);
2338 log_debug("GROUP %u %s:%u",
2340 rules_str(rules, rule->rule.filename_off),
2341 rule->rule.filename_line);
2345 char mode_str[UTIL_NAME_SIZE];
2349 if (event->mode_final)
2351 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), mode_str, sizeof(mode_str));
2352 mode = strtol(mode_str, &endptr, 8);
2353 if (endptr[0] != '\0') {
2354 log_error("ignoring invalid mode '%s'", mode_str);
2357 if (cur->key.op == OP_ASSIGN_FINAL)
2358 event->mode_final = true;
2359 event->mode_set = true;
2361 log_debug("MODE %#o %s:%u",
2363 rules_str(rules, rule->rule.filename_off),
2364 rule->rule.filename_line);
2368 if (event->owner_final)
2370 if (cur->key.op == OP_ASSIGN_FINAL)
2371 event->owner_final = true;
2372 event->owner_set = true;
2373 event->uid = cur->key.uid;
2374 log_debug("OWNER %u %s:%u",
2376 rules_str(rules, rule->rule.filename_off),
2377 rule->rule.filename_line);
2380 if (event->group_final)
2382 if (cur->key.op == OP_ASSIGN_FINAL)
2383 event->group_final = true;
2384 event->group_set = true;
2385 event->gid = cur->key.gid;
2386 log_debug("GROUP %u %s:%u",
2388 rules_str(rules, rule->rule.filename_off),
2389 rule->rule.filename_line);
2392 if (event->mode_final)
2394 if (cur->key.op == OP_ASSIGN_FINAL)
2395 event->mode_final = true;
2396 event->mode_set = true;
2397 event->mode = cur->key.mode;
2398 log_debug("MODE %#o %s:%u",
2400 rules_str(rules, rule->rule.filename_off),
2401 rule->rule.filename_line);
2403 case TK_A_SECLABEL: {
2404 const char *name, *label;
2406 name = rules_str(rules, cur->key.attr_off);
2407 label = rules_str(rules, cur->key.value_off);
2408 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2409 udev_list_cleanup(&event->seclabel_list);
2410 udev_list_entry_add(&event->seclabel_list, name, label);
2411 log_debug("SECLABEL{%s}='%s' %s:%u",
2413 rules_str(rules, rule->rule.filename_off),
2414 rule->rule.filename_line);
2418 const char *name = rules_str(rules, cur->key.attr_off);
2419 char *value = rules_str(rules, cur->key.value_off);
2420 char value_new[UTIL_NAME_SIZE];
2421 const char *value_old = NULL;
2423 if (value[0] == '\0') {
2424 if (cur->key.op == OP_ADD)
2426 udev_device_add_property(event->dev, name, NULL);
2430 if (cur->key.op == OP_ADD)
2431 value_old = udev_device_get_property_value(event->dev, name);
2433 char temp[UTIL_NAME_SIZE];
2435 /* append value separated by space */
2436 udev_event_apply_format(event, value, temp, sizeof(temp));
2437 strscpyl(value_new, sizeof(value_new), value_old, " ", temp, NULL);
2439 udev_event_apply_format(event, value, value_new, sizeof(value_new));
2441 udev_device_add_property(event->dev, name, value_new);
2445 char tag[UTIL_PATH_SIZE];
2448 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), tag, sizeof(tag));
2449 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2450 udev_device_cleanup_tags_list(event->dev);
2451 for (p = tag; *p != '\0'; p++) {
2452 if ((*p >= 'a' && *p <= 'z') ||
2453 (*p >= 'A' && *p <= 'Z') ||
2454 (*p >= '0' && *p <= '9') ||
2455 *p == '-' || *p == '_')
2457 log_error("ignoring invalid tag name '%s'", tag);
2460 if (cur->key.op == OP_REMOVE)
2461 udev_device_remove_tag(event->dev, tag);
2463 udev_device_add_tag(event->dev, tag);
2467 const char *name = rules_str(rules, cur->key.value_off);
2469 char name_str[UTIL_PATH_SIZE];
2472 if (event->name_final)
2474 if (cur->key.op == OP_ASSIGN_FINAL)
2475 event->name_final = true;
2476 udev_event_apply_format(event, name, name_str, sizeof(name_str));
2477 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2478 count = util_replace_chars(name_str, "/");
2480 log_debug("%i character(s) replaced", count);
2482 if (major(udev_device_get_devnum(event->dev)) &&
2483 (!streq(name_str, udev_device_get_devnode(event->dev) + strlen("/dev/")))) {
2484 log_error("NAME=\"%s\" ignored, kernel device nodes "
2485 "can not be renamed; please fix it in %s:%u\n", name,
2486 rules_str(rules, rule->rule.filename_off), rule->rule.filename_line);
2490 event->name = strdup(name_str);
2491 log_debug("NAME '%s' %s:%u",
2493 rules_str(rules, rule->rule.filename_off),
2494 rule->rule.filename_line);
2497 case TK_A_DEVLINK: {
2498 char temp[UTIL_PATH_SIZE];
2499 char filename[UTIL_PATH_SIZE];
2503 if (event->devlink_final)
2505 if (major(udev_device_get_devnum(event->dev)) == 0)
2507 if (cur->key.op == OP_ASSIGN_FINAL)
2508 event->devlink_final = true;
2509 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2510 udev_device_cleanup_devlinks_list(event->dev);
2512 /* allow multiple symlinks separated by spaces */
2513 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), temp, sizeof(temp));
2514 if (esc == ESCAPE_UNSET)
2515 count = util_replace_chars(temp, "/ ");
2516 else if (esc == ESCAPE_REPLACE)
2517 count = util_replace_chars(temp, "/");
2519 log_debug("%i character(s) replaced" , count);
2521 while (isspace(pos[0]))
2523 next = strchr(pos, ' ');
2524 while (next != NULL) {
2526 log_debug("LINK '%s' %s:%u", pos,
2527 rules_str(rules, rule->rule.filename_off), rule->rule.filename_line);
2528 strscpyl(filename, sizeof(filename), "/dev/", pos, NULL);
2529 udev_device_add_devlink(event->dev, filename);
2530 while (isspace(next[1]))
2533 next = strchr(pos, ' ');
2535 if (pos[0] != '\0') {
2536 log_debug("LINK '%s' %s:%u", pos,
2537 rules_str(rules, rule->rule.filename_off), rule->rule.filename_line);
2538 strscpyl(filename, sizeof(filename), "/dev/", pos, NULL);
2539 udev_device_add_devlink(event->dev, filename);
2544 const char *key_name = rules_str(rules, cur->key.attr_off);
2545 char attr[UTIL_PATH_SIZE];
2546 char value[UTIL_NAME_SIZE];
2549 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0)
2550 strscpyl(attr, sizeof(attr), udev_device_get_syspath(event->dev), "/", key_name, NULL);
2551 attr_subst_subdir(attr, sizeof(attr));
2553 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), value, sizeof(value));
2554 log_debug("ATTR '%s' writing '%s' %s:%u", attr, value,
2555 rules_str(rules, rule->rule.filename_off),
2556 rule->rule.filename_line);
2557 f = fopen(attr, "we");
2559 if (fprintf(f, "%s", value) <= 0)
2560 log_error_errno(errno, "error writing ATTR{%s}: %m", attr);
2563 log_error_errno(errno, "error opening ATTR{%s} for writing: %m", attr);
2568 char filename[UTIL_PATH_SIZE];
2569 char value[UTIL_NAME_SIZE];
2572 udev_event_apply_format(event, rules_str(rules, cur->key.attr_off), filename, sizeof(filename));
2573 sysctl_normalize(filename);
2574 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), value, sizeof(value));
2575 log_debug("SYSCTL '%s' writing '%s' %s:%u", filename, value,
2576 rules_str(rules, rule->rule.filename_off), rule->rule.filename_line);
2577 r = sysctl_write(filename, value);
2579 log_error("error writing SYSCTL{%s}='%s': %s", filename, value, strerror(-r));
2582 case TK_A_RUN_BUILTIN:
2583 case TK_A_RUN_PROGRAM: {
2584 struct udev_list_entry *entry;
2586 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2587 udev_list_cleanup(&event->run_list);
2588 log_debug("RUN '%s' %s:%u",
2589 rules_str(rules, cur->key.value_off),
2590 rules_str(rules, rule->rule.filename_off),
2591 rule->rule.filename_line);
2592 entry = udev_list_entry_add(&event->run_list, rules_str(rules, cur->key.value_off), NULL);
2593 udev_list_entry_set_num(entry, cur->key.builtin_cmd);
2597 if (cur->key.rule_goto == 0)
2599 cur = &rules->tokens[cur->key.rule_goto];
2604 case TK_M_PARENTS_MIN:
2605 case TK_M_PARENTS_MAX:
2608 log_error("wrong type %u", cur->type);
2615 /* fast-forward to next rule */
2616 cur = rule + rule->rule.token_count;
2620 int udev_rules_apply_static_dev_perms(struct udev_rules *rules) {
2626 _cleanup_strv_free_ char **tags = NULL;
2629 _cleanup_free_ char *path = NULL;
2632 if (rules->tokens == NULL)
2635 cur = &rules->tokens[0];
2638 switch (cur->type) {
2643 /* skip rules without a static_node tag */
2644 if (!rule->rule.has_static_node)
2660 mode = cur->key.mode;
2663 r = strv_extend(&tags, rules_str(rules, cur->key.value_off));
2668 case TK_A_STATIC_NODE: {
2669 char device_node[UTIL_PATH_SIZE];
2670 char tags_dir[UTIL_PATH_SIZE];
2671 char tag_symlink[UTIL_PATH_SIZE];
2674 /* we assure, that the permissions tokens are sorted before the static token */
2676 if (mode == 0 && uid == 0 && gid == 0 && tags == NULL)
2679 strscpyl(device_node, sizeof(device_node), "/dev/", rules_str(rules, cur->key.value_off), NULL);
2680 if (stat(device_node, &stats) != 0)
2682 if (!S_ISBLK(stats.st_mode) && !S_ISCHR(stats.st_mode))
2685 /* export the tags to a directory as symlinks, allowing otherwise dead nodes to be tagged */
2687 STRV_FOREACH(t, tags) {
2688 _cleanup_free_ char *unescaped_filename = NULL;
2690 strscpyl(tags_dir, sizeof(tags_dir), "/run/udev/static_node-tags/", *t, "/", NULL);
2691 r = mkdir_p(tags_dir, 0755);
2693 return log_error_errno(r, "failed to create %s: %m", tags_dir);
2695 unescaped_filename = xescape(rules_str(rules, cur->key.value_off), "/.");
2697 strscpyl(tag_symlink, sizeof(tag_symlink), tags_dir, unescaped_filename, NULL);
2698 r = symlink(device_node, tag_symlink);
2699 if (r < 0 && errno != EEXIST)
2700 return log_error_errno(errno, "failed to create symlink %s -> %s: %m",
2701 tag_symlink, device_node);
2707 /* don't touch the permissions if only the tags were set */
2708 if (mode == 0 && uid == 0 && gid == 0)
2717 if (mode != (stats.st_mode & 01777)) {
2718 r = chmod(device_node, mode);
2720 log_error("failed to chmod '%s' %#o", device_node, mode);
2723 log_debug("chmod '%s' %#o", device_node, mode);
2726 if ((uid != 0 && uid != stats.st_uid) || (gid != 0 && gid != stats.st_gid)) {
2727 r = chown(device_node, uid, gid);
2729 log_error("failed to chown '%s' %u %u ", device_node, uid, gid);
2732 log_debug("chown '%s' %u %u", device_node, uid, gid);
2735 utimensat(AT_FDCWD, device_node, NULL, 0);
2745 /* fast-forward to next rule */
2746 cur = rule + rule->rule.token_count;
2753 fchmod(fileno(f), 0644);
2754 if (ferror(f) || rename(path, "/run/udev/static_node-tags") < 0) {
2756 unlink("/run/udev/static_node-tags");