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:="" */
98 enum string_glob_type {
100 GL_PLAIN, /* no special chars */
101 GL_GLOB, /* shell globs ?,*,[] */
102 GL_SPLIT, /* multi-value A|B */
103 GL_SPLIT_GLOB, /* multi-value with glob A*|B* */
104 GL_SOMETHING, /* commonly used "?*" */
107 enum string_subst_type {
114 /* tokens of a rule are sorted/handled in this order */
119 TK_M_ACTION, /* val */
120 TK_M_DEVPATH, /* val */
121 TK_M_KERNEL, /* val */
122 TK_M_DEVLINK, /* val */
124 TK_M_ENV, /* val, attr */
126 TK_M_SUBSYSTEM, /* val */
127 TK_M_DRIVER, /* val */
128 TK_M_WAITFOR, /* val */
129 TK_M_ATTR, /* val, attr */
132 TK_M_KERNELS, /* val */
133 TK_M_SUBSYSTEMS, /* val */
134 TK_M_DRIVERS, /* val */
135 TK_M_ATTRS, /* val, attr */
139 TK_M_TEST, /* val, mode_t */
140 TK_M_EVENT_TIMEOUT, /* int */
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;
206 enum udev_builtin_cmd builtin_cmd;
214 struct udev_rules *rules;
216 struct token token[MAX_TK];
217 unsigned int token_cur;
221 static const char *operation_str(enum operation_type type)
223 static const char *operation_strs[] = {
224 [OP_UNSET] = "UNSET",
225 [OP_MATCH] = "match",
226 [OP_NOMATCH] = "nomatch",
227 [OP_MATCH_MAX] = "MATCH_MAX",
230 [OP_ASSIGN] = "assign",
231 [OP_ASSIGN_FINAL] = "assign-final",
234 return operation_strs[type];
237 static const char *string_glob_str(enum string_glob_type type)
239 static const char *string_glob_strs[] = {
240 [GL_UNSET] = "UNSET",
241 [GL_PLAIN] = "plain",
243 [GL_SPLIT] = "split",
244 [GL_SPLIT_GLOB] = "split-glob",
245 [GL_SOMETHING] = "split-glob",
248 return string_glob_strs[type];
251 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",
269 [TK_M_PARENTS_MIN] = "M PARENTS_MIN",
270 [TK_M_KERNELS] = "M KERNELS",
271 [TK_M_SUBSYSTEMS] = "M SUBSYSTEMS",
272 [TK_M_DRIVERS] = "M DRIVERS",
273 [TK_M_ATTRS] = "M ATTRS",
274 [TK_M_TAGS] = "M TAGS",
275 [TK_M_PARENTS_MAX] = "M PARENTS_MAX",
277 [TK_M_TEST] = "M TEST",
278 [TK_M_EVENT_TIMEOUT] = "M EVENT_TIMEOUT",
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_RUN_BUILTIN] = "A RUN_BUILTIN",
308 [TK_A_RUN_PROGRAM] = "A RUN_PROGRAM",
309 [TK_A_GOTO] = "A GOTO",
314 return token_strs[type];
317 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);
375 log_debug("%s %s '%s' '%s'(%s)",
376 token_str(type), operation_str(op), attr, value, string_glob_str(glob));
380 log_debug("%s %s '%s'", token_str(type), operation_str(op), value);
382 case TK_A_STRING_ESCAPE_NONE:
383 case TK_A_STRING_ESCAPE_REPLACE:
384 case TK_A_DB_PERSIST:
385 log_debug("%s", token_str(type));
388 log_debug("%s %s '%s'(%s) %#o",
389 token_str(type), operation_str(op), value, string_glob_str(glob), token->key.mode);
391 case TK_A_INOTIFY_WATCH:
392 log_debug("%s %u", token_str(type), token->key.watch);
394 case TK_A_DEVLINK_PRIO:
395 log_debug("%s %u", token_str(type), token->key.devlink_prio);
398 log_debug("%s %s %u", token_str(type), operation_str(op), token->key.uid);
401 log_debug("%s %s %u", token_str(type), operation_str(op), token->key.gid);
404 log_debug("%s %s %#o", token_str(type), operation_str(op), token->key.mode);
406 case TK_A_STATIC_NODE:
407 log_debug("%s '%s'", token_str(type), value);
410 log_debug("%s %s '%s' '%s'", token_str(type), operation_str(op), attr, value);
412 case TK_M_EVENT_TIMEOUT:
413 log_debug("%s %u", token_str(type), token->key.event_timeout);
416 log_debug("%s '%s' %u", token_str(type), value, token->key.rule_goto);
419 log_debug("* %s", token_str(type));
421 case TK_M_PARENTS_MIN:
422 case TK_M_PARENTS_MAX:
425 log_debug("unknown type %u", type);
430 static void dump_rules(struct udev_rules *rules)
434 log_debug("dumping %u (%zu bytes) tokens, %u (%zu bytes) strings",
436 rules->token_cur * sizeof(struct token),
439 for (i = 0; i < rules->token_cur; i++)
440 dump_token(rules, &rules->tokens[i]);
443 static inline const char *operation_str(enum operation_type type) { return NULL; }
444 static inline const char *token_str(enum token_type type) { return NULL; }
445 static inline void dump_token(struct udev_rules *rules, struct token *token) {}
446 static inline void dump_rules(struct udev_rules *rules) {}
449 static int add_token(struct udev_rules *rules, struct token *token)
451 /* grow buffer if needed */
452 if (rules->token_cur+1 >= rules->token_max) {
453 struct token *tokens;
456 /* double the buffer size */
457 add = rules->token_max;
461 tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
464 rules->tokens = tokens;
465 rules->token_max += add;
467 memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
472 static uid_t add_uid(struct udev_rules *rules, const char *owner)
478 /* lookup, if we know it already */
479 for (i = 0; i < rules->uids_cur; i++) {
480 off = rules->uids[i].name_off;
481 if (streq(rules_str(rules, off), owner)) {
482 uid = rules->uids[i].uid;
486 uid = util_lookup_user(rules->udev, owner);
488 /* grow buffer if needed */
489 if (rules->uids_cur+1 >= rules->uids_max) {
490 struct uid_gid *uids;
493 /* double the buffer size */
494 add = rules->uids_max;
498 uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
502 rules->uids_max += add;
504 rules->uids[rules->uids_cur].uid = uid;
505 off = rules_add_string(rules, owner);
508 rules->uids[rules->uids_cur].name_off = off;
513 static gid_t add_gid(struct udev_rules *rules, const char *group)
519 /* lookup, if we know it already */
520 for (i = 0; i < rules->gids_cur; i++) {
521 off = rules->gids[i].name_off;
522 if (streq(rules_str(rules, off), group)) {
523 gid = rules->gids[i].gid;
527 gid = util_lookup_group(rules->udev, group);
529 /* grow buffer if needed */
530 if (rules->gids_cur+1 >= rules->gids_max) {
531 struct uid_gid *gids;
534 /* double the buffer size */
535 add = rules->gids_max;
539 gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid));
543 rules->gids_max += add;
545 rules->gids[rules->gids_cur].gid = gid;
546 off = rules_add_string(rules, group);
549 rules->gids[rules->gids_cur].name_off = off;
554 static int import_property_from_string(struct udev_device *dev, char *line)
559 struct udev_list_entry *entry;
563 while (isspace(key[0]))
566 /* comment or empty line */
567 if (key[0] == '#' || key[0] == '\0')
570 /* split key/value */
571 val = strchr(key, '=');
578 while (isspace(val[0]))
585 while (isspace(key[len-1]))
589 /* terminate value */
593 while (isspace(val[len-1]))
601 if (val[0] == '"' || val[0] == '\'') {
602 if (val[len-1] != val[0]) {
603 log_debug("inconsistent quoting: '%s', skip", line);
610 entry = udev_device_add_property(dev, key, val);
611 /* store in db, skip private keys */
613 udev_list_entry_set_num(entry, true);
618 static int import_file_into_properties(struct udev_device *dev, const char *filename)
621 char line[UTIL_LINE_SIZE];
623 f = fopen(filename, "re");
626 while (fgets(line, sizeof(line), f) != NULL)
627 import_property_from_string(dev, line);
632 static int import_program_into_properties(struct udev_event *event, const char *program, const sigset_t *sigmask)
634 struct udev_device *dev = event->dev;
636 char result[UTIL_LINE_SIZE];
640 envp = udev_device_get_properties_envp(dev);
641 err = udev_event_spawn(event, program, envp, sigmask, result, sizeof(result));
646 while (line != NULL) {
649 pos = strchr(line, '\n');
654 import_property_from_string(dev, line);
660 static int import_parent_into_properties(struct udev_device *dev, const char *filter)
662 struct udev_device *dev_parent;
663 struct udev_list_entry *list_entry;
665 dev_parent = udev_device_get_parent(dev);
666 if (dev_parent == NULL)
669 udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
670 const char *key = udev_list_entry_get_name(list_entry);
671 const char *val = udev_list_entry_get_value(list_entry);
673 if (fnmatch(filter, key, 0) == 0) {
674 struct udev_list_entry *entry;
676 entry = udev_device_add_property(dev, key, val);
677 /* store in db, skip private keys */
679 udev_list_entry_set_num(entry, true);
685 #define WAIT_LOOP_PER_SECOND 50
686 static int wait_for_file(struct udev_device *dev, const char *file, int timeout)
688 char filepath[UTIL_PATH_SIZE];
689 char devicepath[UTIL_PATH_SIZE];
691 int loop = timeout * WAIT_LOOP_PER_SECOND;
693 /* a relative path is a device attribute */
694 devicepath[0] = '\0';
695 if (file[0] != '/') {
696 strscpyl(devicepath, sizeof(devicepath), udev_device_get_syspath(dev), NULL);
697 strscpyl(filepath, sizeof(filepath), devicepath, "/", file, NULL);
702 const struct timespec duration = { 0, 1000 * 1000 * 1000 / WAIT_LOOP_PER_SECOND };
705 if (stat(file, &stats) == 0) {
706 log_debug("file '%s' appeared after %i loops", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
709 /* make sure, the device did not disappear in the meantime */
710 if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
711 log_debug("device disappeared while waiting for '%s'", file);
714 log_debug("wait for '%s' for %i mseconds", file, 1000 / WAIT_LOOP_PER_SECOND);
715 nanosleep(&duration, NULL);
717 log_debug("waiting for '%s' failed", file);
721 static int attr_subst_subdir(char *attr, size_t len)
725 if (strstr(attr, "/*/")) {
727 char dirname[UTIL_PATH_SIZE];
731 strscpy(dirname, sizeof(dirname), attr);
732 pos = strstr(dirname, "/*/");
737 dir = opendir(dirname);
741 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
744 if (dent->d_name[0] == '.')
746 strscpyl(attr, len, dirname, "/", dent->d_name, tail, NULL);
747 if (stat(attr, &stats) == 0) {
759 static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value)
765 if (linepos == NULL || linepos[0] == '\0')
768 /* skip whitespace */
769 while (isspace(linepos[0]) || linepos[0] == ',')
773 if (linepos[0] == '\0')
779 if (linepos[0] == '\0')
781 if (isspace(linepos[0]))
783 if (linepos[0] == '=')
785 if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
786 if (linepos[1] == '=')
790 /* remember end of key */
793 /* skip whitespace after key */
794 while (isspace(linepos[0]))
796 if (linepos[0] == '\0')
799 /* get operation type */
800 if (linepos[0] == '=' && linepos[1] == '=') {
803 } else if (linepos[0] == '!' && linepos[1] == '=') {
806 } else if (linepos[0] == '+' && linepos[1] == '=') {
809 } else if (linepos[0] == '=') {
812 } else if (linepos[0] == ':' && linepos[1] == '=') {
813 *op = OP_ASSIGN_FINAL;
821 /* skip whitespace after operator */
822 while (isspace(linepos[0]))
824 if (linepos[0] == '\0')
828 if (linepos[0] == '"')
835 temp = strchr(linepos, '"');
841 /* move line to next key */
846 /* extract possible KEY{attr} */
847 static const char *get_key_attribute(struct udev *udev, char *str)
852 attr = strchr(str, '{');
855 pos = strchr(attr, '}');
857 log_error("missing closing brace for format");
866 static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
867 enum operation_type op,
868 const char *value, const void *data)
870 struct token *token = &rule_tmp->token[rule_tmp->token_cur];
871 const char *attr = NULL;
873 memzero(token, sizeof(struct token));
885 case TK_M_SUBSYSTEMS:
889 case TK_M_IMPORT_FILE:
890 case TK_M_IMPORT_PROG:
892 case TK_M_IMPORT_CMDLINE:
893 case TK_M_IMPORT_PARENT:
903 case TK_A_STATIC_NODE:
904 token->key.value_off = rules_add_string(rule_tmp->rules, value);
906 case TK_M_IMPORT_BUILTIN:
907 token->key.value_off = rules_add_string(rule_tmp->rules, value);
908 token->key.builtin_cmd = *(enum udev_builtin_cmd *)data;
917 token->key.value_off = rules_add_string(rule_tmp->rules, value);
918 token->key.attr_off = rules_add_string(rule_tmp->rules, attr);
921 token->key.value_off = rules_add_string(rule_tmp->rules, value);
923 token->key.mode = *(mode_t *)data;
925 case TK_A_STRING_ESCAPE_NONE:
926 case TK_A_STRING_ESCAPE_REPLACE:
927 case TK_A_DB_PERSIST:
929 case TK_A_RUN_BUILTIN:
930 case TK_A_RUN_PROGRAM:
931 token->key.builtin_cmd = *(enum udev_builtin_cmd *)data;
932 token->key.value_off = rules_add_string(rule_tmp->rules, value);
934 case TK_A_INOTIFY_WATCH:
935 case TK_A_DEVLINK_PRIO:
936 token->key.devlink_prio = *(int *)data;
939 token->key.uid = *(uid_t *)data;
942 token->key.gid = *(gid_t *)data;
945 token->key.mode = *(mode_t *)data;
947 case TK_M_EVENT_TIMEOUT:
948 token->key.event_timeout = *(int *)data;
951 case TK_M_PARENTS_MIN:
952 case TK_M_PARENTS_MAX:
956 log_error("wrong type %u", type);
960 if (value != NULL && type < TK_M_MAX) {
961 /* check if we need to split or call fnmatch() while matching rules */
962 enum string_glob_type glob;
966 has_split = (strchr(value, '|') != NULL);
967 has_glob = string_is_glob(value);
968 if (has_split && has_glob) {
969 glob = GL_SPLIT_GLOB;
970 } else if (has_split) {
972 } else if (has_glob) {
973 if (streq(value, "?*"))
980 token->key.glob = glob;
983 if (value != NULL && type > TK_M_MAX) {
984 /* check if assigned value has substitution chars */
986 token->key.subst = SB_SUBSYS;
987 else if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
988 token->key.subst = SB_FORMAT;
990 token->key.subst = SB_NONE;
994 /* check if property/attribute name has substitution chars */
996 token->key.attrsubst = SB_SUBSYS;
997 else if (strchr(attr, '%') != NULL || strchr(attr, '$') != NULL)
998 token->key.attrsubst = SB_FORMAT;
1000 token->key.attrsubst = SB_NONE;
1003 token->key.type = type;
1005 rule_tmp->token_cur++;
1006 if (rule_tmp->token_cur >= ELEMENTSOF(rule_tmp->token)) {
1007 log_error("temporary rule array too small");
1013 static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp)
1016 unsigned int start = 0;
1017 unsigned int end = rule_tmp->token_cur;
1019 for (i = 0; i < rule_tmp->token_cur; i++) {
1020 enum token_type next_val = TK_UNSET;
1021 unsigned int next_idx = 0;
1024 /* find smallest value */
1025 for (j = start; j < end; j++) {
1026 if (rule_tmp->token[j].type == TK_UNSET)
1028 if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
1029 next_val = rule_tmp->token[j].type;
1034 /* add token and mark done */
1035 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
1037 rule_tmp->token[next_idx].type = TK_UNSET;
1040 if (next_idx == start)
1042 if (next_idx+1 == end)
1048 static int add_rule(struct udev_rules *rules, char *line,
1049 const char *filename, unsigned int filename_off, unsigned int lineno)
1053 struct rule_tmp rule_tmp;
1055 memzero(&rule_tmp, sizeof(struct rule_tmp));
1056 rule_tmp.rules = rules;
1057 rule_tmp.rule.type = TK_RULE;
1058 /* the offset in the rule is limited to unsigned short */
1059 if (filename_off < USHRT_MAX)
1060 rule_tmp.rule.rule.filename_off = filename_off;
1061 rule_tmp.rule.rule.filename_line = lineno;
1067 enum operation_type op;
1069 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0) {
1070 /* Avoid erroring on trailing whitespace. This is probably rare
1071 * so save the work for the error case instead of always trying
1072 * to strip the trailing whitespace with strstrip(). */
1073 while (isblank(*linepos))
1076 /* If we aren't at the end of the line, this is a parsing error.
1077 * Make a best effort to describe where the problem is. */
1078 if (*linepos != '\n') {
1079 char buf[2] = {linepos[1]};
1080 _cleanup_free_ char *tmp;
1083 log_error("invalid key/value pair in file %s on line %u,"
1084 "starting at character %tu ('%s')\n",
1085 filename, lineno, linepos - line + 1, tmp);
1086 if (linepos[1] == '#')
1087 log_error("hint: comments can only start at beginning of line");
1092 if (streq(key, "ACTION")) {
1093 if (op > OP_MATCH_MAX) {
1094 log_error("invalid ACTION operation");
1097 rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL);
1101 if (streq(key, "DEVPATH")) {
1102 if (op > OP_MATCH_MAX) {
1103 log_error("invalid DEVPATH operation");
1106 rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
1110 if (streq(key, "KERNEL")) {
1111 if (op > OP_MATCH_MAX) {
1112 log_error("invalid KERNEL operation");
1115 rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL);
1119 if (streq(key, "SUBSYSTEM")) {
1120 if (op > OP_MATCH_MAX) {
1121 log_error("invalid SUBSYSTEM operation");
1124 /* bus, class, subsystem events should all be the same */
1125 if (streq(value, "subsystem") ||
1126 streq(value, "bus") ||
1127 streq(value, "class")) {
1128 if (streq(value, "bus") || streq(value, "class"))
1129 log_error("'%s' must be specified as 'subsystem' "
1130 "please fix it in %s:%u", value, filename, lineno);
1131 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
1133 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
1137 if (streq(key, "DRIVER")) {
1138 if (op > OP_MATCH_MAX) {
1139 log_error("invalid DRIVER operation");
1142 rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL);
1146 if (startswith(key, "ATTR{")) {
1147 attr = get_key_attribute(rules->udev, key + sizeof("ATTR")-1);
1149 log_error("error parsing ATTR attribute");
1152 if (op < OP_MATCH_MAX) {
1153 rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
1155 rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr);
1160 if (startswith(key, "SECLABEL{")) {
1161 attr = get_key_attribute(rules->udev, key + sizeof("SECLABEL")-1);
1163 log_error("error parsing SECLABEL attribute");
1167 rule_add_key(&rule_tmp, TK_A_SECLABEL, op, value, attr);
1171 if (streq(key, "KERNELS")) {
1172 if (op > OP_MATCH_MAX) {
1173 log_error("invalid KERNELS operation");
1176 rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1180 if (streq(key, "SUBSYSTEMS")) {
1181 if (op > OP_MATCH_MAX) {
1182 log_error("invalid SUBSYSTEMS operation");
1185 rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1189 if (streq(key, "DRIVERS")) {
1190 if (op > OP_MATCH_MAX) {
1191 log_error("invalid DRIVERS operation");
1194 rule_add_key(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
1198 if (startswith(key, "ATTRS{")) {
1199 if (op > OP_MATCH_MAX) {
1200 log_error("invalid ATTRS operation");
1203 attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
1205 log_error("error parsing ATTRS attribute");
1208 if (startswith(attr, "device/"))
1209 log_error("the 'device' link may not be available in a future kernel, "
1210 "please fix it in %s:%u", filename, lineno);
1211 else if (strstr(attr, "../") != NULL)
1212 log_error("do not reference parent sysfs directories directly, "
1213 "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
1214 rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1218 if (streq(key, "TAGS")) {
1219 if (op > OP_MATCH_MAX) {
1220 log_error("invalid TAGS operation");
1223 rule_add_key(&rule_tmp, TK_M_TAGS, op, value, NULL);
1227 if (startswith(key, "ENV{")) {
1228 attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1);
1230 log_error("error parsing ENV attribute");
1233 if (op < OP_MATCH_MAX) {
1234 if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
1237 static const char *blacklist[] = {
1252 for (i = 0; i < ELEMENTSOF(blacklist); i++) {
1253 if (!streq(attr, blacklist[i]))
1255 log_error("invalid ENV attribute, '%s' can not be set %s:%u", attr, filename, lineno);
1258 if (rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
1264 if (streq(key, "TAG")) {
1265 if (op < OP_MATCH_MAX)
1266 rule_add_key(&rule_tmp, TK_M_TAG, op, value, NULL);
1268 rule_add_key(&rule_tmp, TK_A_TAG, op, value, NULL);
1272 if (streq(key, "PROGRAM")) {
1273 rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
1277 if (streq(key, "RESULT")) {
1278 if (op > OP_MATCH_MAX) {
1279 log_error("invalid RESULT operation");
1282 rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL);
1286 if (startswith(key, "IMPORT")) {
1287 attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1);
1289 log_error("IMPORT{} type missing, ignoring IMPORT %s:%u", filename, lineno);
1292 if (streq(attr, "program")) {
1293 /* find known built-in command */
1294 if (value[0] != '/') {
1295 enum udev_builtin_cmd cmd;
1297 cmd = udev_builtin_lookup(value);
1298 if (cmd < UDEV_BUILTIN_MAX) {
1299 log_debug("IMPORT found builtin '%s', replacing %s:%u",
1300 value, filename, lineno);
1301 rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, value, &cmd);
1305 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1306 } else if (streq(attr, "builtin")) {
1307 enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
1309 if (cmd < UDEV_BUILTIN_MAX)
1310 rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, value, &cmd);
1312 log_error("IMPORT{builtin}: '%s' unknown %s:%u", value, filename, lineno);
1313 } else if (streq(attr, "file")) {
1314 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1315 } else if (streq(attr, "db")) {
1316 rule_add_key(&rule_tmp, TK_M_IMPORT_DB, op, value, NULL);
1317 } else if (streq(attr, "cmdline")) {
1318 rule_add_key(&rule_tmp, TK_M_IMPORT_CMDLINE, op, value, NULL);
1319 } else if (streq(attr, "parent")) {
1320 rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
1322 log_error("IMPORT{} unknown type, ignoring IMPORT %s:%u", filename, lineno);
1326 if (startswith(key, "TEST")) {
1329 if (op > OP_MATCH_MAX) {
1330 log_error("invalid TEST operation");
1333 attr = get_key_attribute(rules->udev, key + sizeof("TEST")-1);
1335 mode = strtol(attr, NULL, 8);
1336 rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode);
1338 rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL);
1343 if (startswith(key, "RUN")) {
1344 attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1);
1348 if (streq(attr, "builtin")) {
1349 enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
1351 if (cmd < UDEV_BUILTIN_MAX)
1352 rule_add_key(&rule_tmp, TK_A_RUN_BUILTIN, op, value, &cmd);
1354 log_error("IMPORT{builtin}: '%s' unknown %s:%u", value, filename, lineno);
1355 } else if (streq(attr, "program")) {
1356 enum udev_builtin_cmd cmd = UDEV_BUILTIN_MAX;
1358 rule_add_key(&rule_tmp, TK_A_RUN_PROGRAM, op, value, &cmd);
1360 log_error("RUN{} unknown type, ignoring RUN %s:%u", filename, lineno);
1366 if (streq(key, "WAIT_FOR") || streq(key, "WAIT_FOR_SYSFS")) {
1367 rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1371 if (streq(key, "LABEL")) {
1372 rule_tmp.rule.rule.label_off = rules_add_string(rules, value);
1376 if (streq(key, "GOTO")) {
1377 rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1381 if (startswith(key, "NAME")) {
1382 if (op < OP_MATCH_MAX) {
1383 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
1385 if (streq(value, "%k")) {
1386 log_error("NAME=\"%%k\" is ignored, because it breaks kernel supplied names, "
1387 "please remove it from %s:%u\n", filename, lineno);
1390 if (value[0] == '\0') {
1391 log_debug("NAME=\"\" is ignored, because udev will not delete any device nodes, "
1392 "please remove it from %s:%u\n", filename, lineno);
1395 rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL);
1397 rule_tmp.rule.rule.can_set_name = true;
1401 if (streq(key, "SYMLINK")) {
1402 if (op < OP_MATCH_MAX)
1403 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
1405 rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, NULL);
1406 rule_tmp.rule.rule.can_set_name = true;
1410 if (streq(key, "OWNER")) {
1414 uid = strtoul(value, &endptr, 10);
1415 if (endptr[0] == '\0') {
1416 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1417 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1418 uid = add_uid(rules, value);
1419 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1420 } else if (rules->resolve_names >= 0) {
1421 rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
1423 rule_tmp.rule.rule.can_set_name = true;
1427 if (streq(key, "GROUP")) {
1431 gid = strtoul(value, &endptr, 10);
1432 if (endptr[0] == '\0') {
1433 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1434 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1435 gid = add_gid(rules, value);
1436 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1437 } else if (rules->resolve_names >= 0) {
1438 rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
1440 rule_tmp.rule.rule.can_set_name = true;
1444 if (streq(key, "MODE")) {
1448 mode = strtol(value, &endptr, 8);
1449 if (endptr[0] == '\0')
1450 rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1452 rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
1453 rule_tmp.rule.rule.can_set_name = true;
1457 if (streq(key, "OPTIONS")) {
1460 pos = strstr(value, "link_priority=");
1462 int prio = atoi(&pos[strlen("link_priority=")]);
1464 rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, op, NULL, &prio);
1467 pos = strstr(value, "event_timeout=");
1469 int tout = atoi(&pos[strlen("event_timeout=")]);
1471 rule_add_key(&rule_tmp, TK_M_EVENT_TIMEOUT, op, NULL, &tout);
1474 pos = strstr(value, "string_escape=");
1476 pos = &pos[strlen("string_escape=")];
1477 if (startswith(pos, "none"))
1478 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, op, NULL, NULL);
1479 else if (startswith(pos, "replace"))
1480 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, op, NULL, NULL);
1483 pos = strstr(value, "db_persist");
1485 rule_add_key(&rule_tmp, TK_A_DB_PERSIST, op, NULL, NULL);
1487 pos = strstr(value, "nowatch");
1491 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &off);
1493 pos = strstr(value, "watch");
1497 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &on);
1501 pos = strstr(value, "static_node=");
1503 rule_add_key(&rule_tmp, TK_A_STATIC_NODE, op, &pos[strlen("static_node=")], NULL);
1504 rule_tmp.rule.rule.has_static_node = true;
1510 log_error("unknown key '%s' in %s:%u", key, filename, lineno);
1514 /* add rule token */
1515 rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur;
1516 if (add_token(rules, &rule_tmp.rule) != 0)
1519 /* add tokens to list, sorted by type */
1520 if (sort_token(rules, &rule_tmp) != 0)
1525 log_error("invalid rule '%s:%u'", filename, lineno);
1529 static int parse_file(struct udev_rules *rules, const char *filename)
1532 unsigned int first_token;
1533 unsigned int filename_off;
1534 char line[UTIL_LINE_SIZE];
1538 if (null_or_empty_path(filename)) {
1539 log_debug("skip empty file: %s", filename);
1542 log_debug("read rules file: %s", filename);
1544 f = fopen(filename, "re");
1548 first_token = rules->token_cur;
1549 filename_off = rules_add_string(rules, filename);
1551 while (fgets(line, sizeof(line), f) != NULL) {
1555 /* skip whitespace */
1558 while (isspace(key[0]))
1569 /* continue reading if backslash+newline is found */
1570 while (line[len-2] == '\\') {
1571 if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1573 if (strlen(&line[len-2]) < 2)
1579 if (len+1 >= sizeof(line)) {
1580 log_error("line too long '%s':%u, ignored", filename, line_nr);
1583 add_rule(rules, key, filename, filename_off, line_nr);
1587 /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1588 for (i = first_token+1; i < rules->token_cur; i++) {
1589 if (rules->tokens[i].type == TK_A_GOTO) {
1590 char *label = rules_str(rules, rules->tokens[i].key.value_off);
1593 for (j = i+1; j < rules->token_cur; j++) {
1594 if (rules->tokens[j].type != TK_RULE)
1596 if (rules->tokens[j].rule.label_off == 0)
1598 if (!streq(label, rules_str(rules, rules->tokens[j].rule.label_off)))
1600 rules->tokens[i].key.rule_goto = j;
1603 if (rules->tokens[i].key.rule_goto == 0)
1604 log_error("GOTO '%s' has no matching label in: '%s'", label, filename);
1610 struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
1612 struct udev_rules *rules;
1613 struct udev_list file_list;
1614 struct token end_token;
1618 rules = calloc(1, sizeof(struct udev_rules));
1622 rules->resolve_names = resolve_names;
1623 udev_list_init(udev, &file_list, true);
1625 /* init token array and string buffer */
1626 rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
1627 if (rules->tokens == NULL)
1628 return udev_rules_unref(rules);
1629 rules->token_max = PREALLOC_TOKEN;
1631 rules->strbuf = strbuf_new();
1633 return udev_rules_unref(rules);
1635 udev_rules_check_timestamp(rules);
1637 r = conf_files_list_strv(&files, ".rules", NULL, rules_dirs);
1639 log_error("failed to enumerate rules files: %s", strerror(-r));
1640 return udev_rules_unref(rules);
1644 * The offset value in the rules strct is limited; add all
1645 * rules file names to the beginning of the string buffer.
1647 STRV_FOREACH(f, files)
1648 rules_add_string(rules, *f);
1650 STRV_FOREACH(f, files)
1651 parse_file(rules, *f);
1655 memzero(&end_token, sizeof(struct token));
1656 end_token.type = TK_END;
1657 add_token(rules, &end_token);
1658 log_debug("rules contain %zu bytes tokens (%u * %zu bytes), %zu bytes strings",
1659 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->strbuf->len);
1661 /* cleanup temporary strbuf data */
1662 log_debug("%zu strings (%zu bytes), %zu de-duplicated (%zu bytes), %zu trie nodes used",
1663 rules->strbuf->in_count, rules->strbuf->in_len,
1664 rules->strbuf->dedup_count, rules->strbuf->dedup_len, rules->strbuf->nodes_count);
1665 strbuf_complete(rules->strbuf);
1667 /* cleanup uid/gid cache */
1670 rules->uids_cur = 0;
1671 rules->uids_max = 0;
1674 rules->gids_cur = 0;
1675 rules->gids_max = 0;
1681 struct udev_rules *udev_rules_unref(struct udev_rules *rules)
1685 free(rules->tokens);
1686 strbuf_cleanup(rules->strbuf);
1693 bool udev_rules_check_timestamp(struct udev_rules *rules)
1698 return paths_check_timestamp(rules_dirs, &rules->dirs_ts_usec, true);
1701 static int match_key(struct udev_rules *rules, struct token *token, const char *val)
1703 char *key_value = rules_str(rules, token->key.value_off);
1710 switch (token->key.glob) {
1712 match = (streq(key_value, val));
1715 match = (fnmatch(key_value, val, 0) == 0);
1722 s = rules_str(rules, token->key.value_off);
1727 next = strchr(s, '|');
1729 size_t matchlen = (size_t)(next - s);
1731 match = (matchlen == len && strneq(s, val, matchlen));
1735 match = (streq(s, val));
1744 char value[UTIL_PATH_SIZE];
1746 strscpy(value, sizeof(value), rules_str(rules, token->key.value_off));
1748 while (key_value != NULL) {
1749 pos = strchr(key_value, '|');
1754 match = (fnmatch(key_value, val, 0) == 0);
1762 match = (val[0] != '\0');
1768 if (match && (token->key.op == OP_MATCH))
1770 if (!match && (token->key.op == OP_NOMATCH))
1775 static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur)
1778 char nbuf[UTIL_NAME_SIZE];
1780 char vbuf[UTIL_NAME_SIZE];
1783 name = rules_str(rules, cur->key.attr_off);
1784 switch (cur->key.attrsubst) {
1786 udev_event_apply_format(event, name, nbuf, sizeof(nbuf));
1790 value = udev_device_get_sysattr_value(dev, name);
1795 if (util_resolve_subsys_kernel(event->udev, name, vbuf, sizeof(vbuf), 1) != 0)
1803 /* remove trailing whitespace, if not asked to match for it */
1804 len = strlen(value);
1805 if (len > 0 && isspace(value[len-1])) {
1806 const char *key_value;
1809 key_value = rules_str(rules, cur->key.value_off);
1810 klen = strlen(key_value);
1811 if (klen > 0 && !isspace(key_value[klen-1])) {
1812 if (value != vbuf) {
1813 strscpy(vbuf, sizeof(vbuf), value);
1816 while (len > 0 && isspace(vbuf[--len]))
1821 return match_key(rules, cur, value);
1830 int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event, const sigset_t *sigmask)
1834 enum escape_type esc = ESCAPE_UNSET;
1837 if (rules->tokens == NULL)
1840 can_set_name = ((!streq(udev_device_get_action(event->dev), "remove")) &&
1841 (major(udev_device_get_devnum(event->dev)) > 0 ||
1842 udev_device_get_ifindex(event->dev) > 0));
1844 /* loop through token list, match, run actions or forward to next rule */
1845 cur = &rules->tokens[0];
1848 dump_token(rules, cur);
1849 switch (cur->type) {
1853 /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
1854 if (!can_set_name && rule->rule.can_set_name)
1859 if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
1863 if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
1867 if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
1870 case TK_M_DEVLINK: {
1871 struct udev_list_entry *list_entry;
1874 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
1875 const char *devlink;
1877 devlink = udev_list_entry_get_name(list_entry) + strlen("/dev/");
1878 if (match_key(rules, cur, devlink) == 0) {
1888 if (match_key(rules, cur, event->name) != 0)
1892 const char *key_name = rules_str(rules, cur->key.attr_off);
1895 value = udev_device_get_property_value(event->dev, key_name);
1898 if (match_key(rules, cur, value))
1903 struct udev_list_entry *list_entry;
1906 udev_list_entry_foreach(list_entry, udev_device_get_tags_list_entry(event->dev)) {
1907 if (streq(rules_str(rules, cur->key.value_off), udev_list_entry_get_name(list_entry))) {
1912 if (!match && (cur->key.op != OP_NOMATCH))
1916 case TK_M_SUBSYSTEM:
1917 if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
1921 if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
1924 case TK_M_WAITFOR: {
1925 char filename[UTIL_PATH_SIZE];
1928 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), filename, sizeof(filename));
1929 found = (wait_for_file(event->dev, filename, 10) == 0);
1930 if (!found && (cur->key.op != OP_NOMATCH))
1935 if (match_attr(rules, event->dev, event, cur) != 0)
1939 case TK_M_SUBSYSTEMS:
1945 /* get whole sequence of parent matches */
1947 while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX)
1950 /* loop over parents */
1951 event->dev_parent = event->dev;
1955 /* loop over sequence of parent match keys */
1956 for (key = cur; key < next; key++ ) {
1957 dump_token(rules, key);
1960 if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
1963 case TK_M_SUBSYSTEMS:
1964 if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
1968 if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
1972 if (match_attr(rules, event->dev_parent, event, key) != 0)
1976 bool match = udev_device_has_tag(event->dev_parent, rules_str(rules, cur->key.value_off));
1978 if (match && key->key.op == OP_NOMATCH)
1980 if (!match && key->key.op == OP_MATCH)
1991 event->dev_parent = udev_device_get_parent(event->dev_parent);
1992 if (event->dev_parent == NULL)
1995 /* move behind our sequence of parent match keys */
2000 char filename[UTIL_PATH_SIZE];
2001 struct stat statbuf;
2004 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), filename, sizeof(filename));
2005 if (util_resolve_subsys_kernel(event->udev, filename, filename, sizeof(filename), 0) != 0) {
2006 if (filename[0] != '/') {
2007 char tmp[UTIL_PATH_SIZE];
2009 strscpy(tmp, sizeof(tmp), filename);
2010 strscpyl(filename, sizeof(filename),
2011 udev_device_get_syspath(event->dev), "/", tmp, NULL);
2014 attr_subst_subdir(filename, sizeof(filename));
2016 match = (stat(filename, &statbuf) == 0);
2017 if (match && cur->key.mode > 0)
2018 match = ((statbuf.st_mode & cur->key.mode) > 0);
2019 if (match && cur->key.op == OP_NOMATCH)
2021 if (!match && cur->key.op == OP_MATCH)
2025 case TK_M_EVENT_TIMEOUT:
2026 log_debug("OPTIONS event_timeout=%u", cur->key.event_timeout);
2027 event->timeout_usec = cur->key.event_timeout * 1000 * 1000;
2029 case TK_M_PROGRAM: {
2030 char program[UTIL_PATH_SIZE];
2032 char result[UTIL_PATH_SIZE];
2034 free(event->program_result);
2035 event->program_result = NULL;
2036 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), program, sizeof(program));
2037 envp = udev_device_get_properties_envp(event->dev);
2038 log_debug("PROGRAM '%s' %s:%u",
2040 rules_str(rules, rule->rule.filename_off),
2041 rule->rule.filename_line);
2043 if (udev_event_spawn(event, program, envp, sigmask, result, sizeof(result)) < 0) {
2044 if (cur->key.op != OP_NOMATCH)
2049 util_remove_trailing_chars(result, '\n');
2050 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2051 count = util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
2053 log_debug("%i character(s) replaced" , count);
2055 event->program_result = strdup(result);
2056 if (cur->key.op == OP_NOMATCH)
2061 case TK_M_IMPORT_FILE: {
2062 char import[UTIL_PATH_SIZE];
2064 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), import, sizeof(import));
2065 if (import_file_into_properties(event->dev, import) != 0)
2066 if (cur->key.op != OP_NOMATCH)
2070 case TK_M_IMPORT_PROG: {
2071 char import[UTIL_PATH_SIZE];
2073 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), import, sizeof(import));
2074 log_debug("IMPORT '%s' %s:%u",
2076 rules_str(rules, rule->rule.filename_off),
2077 rule->rule.filename_line);
2079 if (import_program_into_properties(event, import, sigmask) != 0)
2080 if (cur->key.op != OP_NOMATCH)
2084 case TK_M_IMPORT_BUILTIN: {
2085 char command[UTIL_PATH_SIZE];
2087 if (udev_builtin_run_once(cur->key.builtin_cmd)) {
2088 /* check if we ran already */
2089 if (event->builtin_run & (1 << cur->key.builtin_cmd)) {
2090 log_debug("IMPORT builtin skip '%s' %s:%u",
2091 udev_builtin_name(cur->key.builtin_cmd),
2092 rules_str(rules, rule->rule.filename_off),
2093 rule->rule.filename_line);
2094 /* return the result from earlier run */
2095 if (event->builtin_ret & (1 << cur->key.builtin_cmd))
2096 if (cur->key.op != OP_NOMATCH)
2101 event->builtin_run |= (1 << cur->key.builtin_cmd);
2104 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), command, sizeof(command));
2105 log_debug("IMPORT builtin '%s' %s:%u",
2106 udev_builtin_name(cur->key.builtin_cmd),
2107 rules_str(rules, rule->rule.filename_off),
2108 rule->rule.filename_line);
2110 if (udev_builtin_run(event->dev, cur->key.builtin_cmd, command, false) != 0) {
2111 /* remember failure */
2112 log_debug("IMPORT builtin '%s' returned non-zero",
2113 udev_builtin_name(cur->key.builtin_cmd));
2114 event->builtin_ret |= (1 << cur->key.builtin_cmd);
2115 if (cur->key.op != OP_NOMATCH)
2120 case TK_M_IMPORT_DB: {
2121 const char *key = rules_str(rules, cur->key.value_off);
2124 value = udev_device_get_property_value(event->dev_db, key);
2125 if (value != NULL) {
2126 struct udev_list_entry *entry;
2128 entry = udev_device_add_property(event->dev, key, value);
2129 udev_list_entry_set_num(entry, true);
2131 if (cur->key.op != OP_NOMATCH)
2136 case TK_M_IMPORT_CMDLINE: {
2138 bool imported = false;
2140 f = fopen("/proc/cmdline", "re");
2144 if (fgets(cmdline, sizeof(cmdline), f) != NULL) {
2145 const char *key = rules_str(rules, cur->key.value_off);
2148 pos = strstr(cmdline, key);
2150 struct udev_list_entry *entry;
2153 if (pos[0] == '\0' || isspace(pos[0])) {
2154 /* we import simple flags as 'FLAG=1' */
2155 entry = udev_device_add_property(event->dev, key, "1");
2156 udev_list_entry_set_num(entry, true);
2158 } else if (pos[0] == '=') {
2163 while (pos[0] != '\0' && !isspace(pos[0]))
2166 entry = udev_device_add_property(event->dev, key, value);
2167 udev_list_entry_set_num(entry, true);
2174 if (!imported && cur->key.op != OP_NOMATCH)
2178 case TK_M_IMPORT_PARENT: {
2179 char import[UTIL_PATH_SIZE];
2181 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), import, sizeof(import));
2182 if (import_parent_into_properties(event->dev, import) != 0)
2183 if (cur->key.op != OP_NOMATCH)
2188 if (match_key(rules, cur, event->program_result) != 0)
2191 case TK_A_STRING_ESCAPE_NONE:
2194 case TK_A_STRING_ESCAPE_REPLACE:
2195 esc = ESCAPE_REPLACE;
2197 case TK_A_DB_PERSIST:
2198 udev_device_set_db_persist(event->dev);
2200 case TK_A_INOTIFY_WATCH:
2201 if (event->inotify_watch_final)
2203 if (cur->key.op == OP_ASSIGN_FINAL)
2204 event->inotify_watch_final = true;
2205 event->inotify_watch = cur->key.watch;
2207 case TK_A_DEVLINK_PRIO:
2208 udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
2211 char owner[UTIL_NAME_SIZE];
2213 if (event->owner_final)
2215 if (cur->key.op == OP_ASSIGN_FINAL)
2216 event->owner_final = true;
2217 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), owner, sizeof(owner));
2218 event->owner_set = true;
2219 event->uid = util_lookup_user(event->udev, owner);
2220 log_debug("OWNER %u %s:%u",
2222 rules_str(rules, rule->rule.filename_off),
2223 rule->rule.filename_line);
2227 char group[UTIL_NAME_SIZE];
2229 if (event->group_final)
2231 if (cur->key.op == OP_ASSIGN_FINAL)
2232 event->group_final = true;
2233 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), group, sizeof(group));
2234 event->group_set = true;
2235 event->gid = util_lookup_group(event->udev, group);
2236 log_debug("GROUP %u %s:%u",
2238 rules_str(rules, rule->rule.filename_off),
2239 rule->rule.filename_line);
2243 char mode_str[UTIL_NAME_SIZE];
2247 if (event->mode_final)
2249 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), mode_str, sizeof(mode_str));
2250 mode = strtol(mode_str, &endptr, 8);
2251 if (endptr[0] != '\0') {
2252 log_error("ignoring invalid mode '%s'", mode_str);
2255 if (cur->key.op == OP_ASSIGN_FINAL)
2256 event->mode_final = true;
2257 event->mode_set = true;
2259 log_debug("MODE %#o %s:%u",
2261 rules_str(rules, rule->rule.filename_off),
2262 rule->rule.filename_line);
2266 if (event->owner_final)
2268 if (cur->key.op == OP_ASSIGN_FINAL)
2269 event->owner_final = true;
2270 event->owner_set = true;
2271 event->uid = cur->key.uid;
2272 log_debug("OWNER %u %s:%u",
2274 rules_str(rules, rule->rule.filename_off),
2275 rule->rule.filename_line);
2278 if (event->group_final)
2280 if (cur->key.op == OP_ASSIGN_FINAL)
2281 event->group_final = true;
2282 event->group_set = true;
2283 event->gid = cur->key.gid;
2284 log_debug("GROUP %u %s:%u",
2286 rules_str(rules, rule->rule.filename_off),
2287 rule->rule.filename_line);
2290 if (event->mode_final)
2292 if (cur->key.op == OP_ASSIGN_FINAL)
2293 event->mode_final = true;
2294 event->mode_set = true;
2295 event->mode = cur->key.mode;
2296 log_debug("MODE %#o %s:%u",
2298 rules_str(rules, rule->rule.filename_off),
2299 rule->rule.filename_line);
2301 case TK_A_SECLABEL: {
2302 const char *name, *label;
2304 name = rules_str(rules, cur->key.attr_off);
2305 label = rules_str(rules, cur->key.value_off);
2306 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2307 udev_list_cleanup(&event->seclabel_list);
2308 udev_list_entry_add(&event->seclabel_list, name, label);
2309 log_debug("SECLABEL{%s}='%s' %s:%u",
2311 rules_str(rules, rule->rule.filename_off),
2312 rule->rule.filename_line);
2316 const char *name = rules_str(rules, cur->key.attr_off);
2317 char *value = rules_str(rules, cur->key.value_off);
2318 char value_new[UTIL_NAME_SIZE];
2319 const char *value_old = NULL;
2320 struct udev_list_entry *entry;
2322 if (value[0] == '\0') {
2323 if (cur->key.op == OP_ADD)
2325 udev_device_add_property(event->dev, name, NULL);
2329 if (cur->key.op == OP_ADD)
2330 value_old = udev_device_get_property_value(event->dev, name);
2332 char temp[UTIL_NAME_SIZE];
2334 /* append value separated by space */
2335 udev_event_apply_format(event, value, temp, sizeof(temp));
2336 strscpyl(value_new, sizeof(value_new), value_old, " ", temp, NULL);
2338 udev_event_apply_format(event, value, value_new, sizeof(value_new));
2340 entry = udev_device_add_property(event->dev, name, value_new);
2341 /* store in db, skip private keys */
2343 udev_list_entry_set_num(entry, true);
2347 char tag[UTIL_PATH_SIZE];
2350 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), tag, sizeof(tag));
2351 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2352 udev_device_cleanup_tags_list(event->dev);
2353 for (p = tag; *p != '\0'; p++) {
2354 if ((*p >= 'a' && *p <= 'z') ||
2355 (*p >= 'A' && *p <= 'Z') ||
2356 (*p >= '0' && *p <= '9') ||
2357 *p == '-' || *p == '_')
2359 log_error("ignoring invalid tag name '%s'", tag);
2362 udev_device_add_tag(event->dev, tag);
2366 const char *name = rules_str(rules, cur->key.value_off);
2368 char name_str[UTIL_PATH_SIZE];
2371 if (event->name_final)
2373 if (cur->key.op == OP_ASSIGN_FINAL)
2374 event->name_final = true;
2375 udev_event_apply_format(event, name, name_str, sizeof(name_str));
2376 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2377 count = util_replace_chars(name_str, "/");
2379 log_debug("%i character(s) replaced", count);
2381 if (major(udev_device_get_devnum(event->dev)) &&
2382 (!streq(name_str, udev_device_get_devnode(event->dev) + strlen("/dev/")))) {
2383 log_error("NAME=\"%s\" ignored, kernel device nodes "
2384 "can not be renamed; please fix it in %s:%u\n", name,
2385 rules_str(rules, rule->rule.filename_off), rule->rule.filename_line);
2389 event->name = strdup(name_str);
2390 log_debug("NAME '%s' %s:%u",
2392 rules_str(rules, rule->rule.filename_off),
2393 rule->rule.filename_line);
2396 case TK_A_DEVLINK: {
2397 char temp[UTIL_PATH_SIZE];
2398 char filename[UTIL_PATH_SIZE];
2402 if (event->devlink_final)
2404 if (major(udev_device_get_devnum(event->dev)) == 0)
2406 if (cur->key.op == OP_ASSIGN_FINAL)
2407 event->devlink_final = true;
2408 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2409 udev_device_cleanup_devlinks_list(event->dev);
2411 /* allow multiple symlinks separated by spaces */
2412 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), temp, sizeof(temp));
2413 if (esc == ESCAPE_UNSET)
2414 count = util_replace_chars(temp, "/ ");
2415 else if (esc == ESCAPE_REPLACE)
2416 count = util_replace_chars(temp, "/");
2418 log_debug("%i character(s) replaced" , count);
2420 while (isspace(pos[0]))
2422 next = strchr(pos, ' ');
2423 while (next != NULL) {
2425 log_debug("LINK '%s' %s:%u", pos,
2426 rules_str(rules, rule->rule.filename_off), rule->rule.filename_line);
2427 strscpyl(filename, sizeof(filename), "/dev/", pos, NULL);
2428 udev_device_add_devlink(event->dev, filename);
2429 while (isspace(next[1]))
2432 next = strchr(pos, ' ');
2434 if (pos[0] != '\0') {
2435 log_debug("LINK '%s' %s:%u", pos,
2436 rules_str(rules, rule->rule.filename_off), rule->rule.filename_line);
2437 strscpyl(filename, sizeof(filename), "/dev/", pos, NULL);
2438 udev_device_add_devlink(event->dev, filename);
2443 const char *key_name = rules_str(rules, cur->key.attr_off);
2444 char attr[UTIL_PATH_SIZE];
2445 char value[UTIL_NAME_SIZE];
2448 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0)
2449 strscpyl(attr, sizeof(attr), udev_device_get_syspath(event->dev), "/", key_name, NULL);
2450 attr_subst_subdir(attr, sizeof(attr));
2452 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), value, sizeof(value));
2453 log_debug("ATTR '%s' writing '%s' %s:%u", attr, value,
2454 rules_str(rules, rule->rule.filename_off),
2455 rule->rule.filename_line);
2456 f = fopen(attr, "we");
2458 if (fprintf(f, "%s", value) <= 0)
2459 log_error("error writing ATTR{%s}: %m", attr);
2462 log_error("error opening ATTR{%s} for writing: %m", attr);
2466 case TK_A_RUN_BUILTIN:
2467 case TK_A_RUN_PROGRAM: {
2468 struct udev_list_entry *entry;
2470 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2471 udev_list_cleanup(&event->run_list);
2472 log_debug("RUN '%s' %s:%u",
2473 rules_str(rules, cur->key.value_off),
2474 rules_str(rules, rule->rule.filename_off),
2475 rule->rule.filename_line);
2476 entry = udev_list_entry_add(&event->run_list, rules_str(rules, cur->key.value_off), NULL);
2477 udev_list_entry_set_num(entry, cur->key.builtin_cmd);
2481 if (cur->key.rule_goto == 0)
2483 cur = &rules->tokens[cur->key.rule_goto];
2488 case TK_M_PARENTS_MIN:
2489 case TK_M_PARENTS_MAX:
2492 log_error("wrong type %u", cur->type);
2499 /* fast-forward to next rule */
2500 cur = rule + rule->rule.token_count;
2504 int udev_rules_apply_static_dev_perms(struct udev_rules *rules)
2511 _cleanup_strv_free_ char **tags = NULL;
2514 _cleanup_free_ char *path = NULL;
2517 if (rules->tokens == NULL)
2520 cur = &rules->tokens[0];
2523 switch (cur->type) {
2528 /* skip rules without a static_node tag */
2529 if (!rule->rule.has_static_node)
2545 mode = cur->key.mode;
2548 r = strv_extend(&tags, rules_str(rules, cur->key.value_off));
2553 case TK_A_STATIC_NODE: {
2554 char device_node[UTIL_PATH_SIZE];
2555 char tags_dir[UTIL_PATH_SIZE];
2556 char tag_symlink[UTIL_PATH_SIZE];
2559 /* we assure, that the permissions tokens are sorted before the static token */
2560 if (mode == 0 && uid == 0 && gid == 0 && tags == NULL)
2563 strscpyl(device_node, sizeof(device_node), "/dev/", rules_str(rules, cur->key.value_off), NULL);
2565 /* export the tags to a directory as symlinks, allowing otherwise dead nodes to be tagged */
2567 STRV_FOREACH(t, tags) {
2568 _cleanup_free_ char *unescaped_filename = NULL;
2570 strscpyl(tags_dir, sizeof(tags_dir), "/run/udev/static_node-tags/", *t, "/", NULL);
2571 r = mkdir_p(tags_dir, 0755);
2573 log_error("failed to create %s: %s", tags_dir, strerror(-r));
2577 unescaped_filename = xescape(rules_str(rules, cur->key.value_off), "/.");
2579 strscpyl(tag_symlink, sizeof(tag_symlink), tags_dir, unescaped_filename, NULL);
2580 r = symlink(device_node, tag_symlink);
2581 if (r < 0 && errno != EEXIST) {
2582 log_error("failed to create symlink %s -> %s: %m", tag_symlink, device_node);
2589 /* don't touch the permissions if only the tags were set */
2590 if (mode == 0 && uid == 0 && gid == 0)
2593 if (stat(device_node, &stats) != 0)
2595 if (!S_ISBLK(stats.st_mode) && !S_ISCHR(stats.st_mode))
2604 if (mode != (stats.st_mode & 01777)) {
2605 r = chmod(device_node, mode);
2607 log_error("failed to chmod '%s' %#o", device_node, mode);
2610 log_debug("chmod '%s' %#o", device_node, mode);
2613 if ((uid != 0 && uid != stats.st_uid) || (gid != 0 && gid != stats.st_gid)) {
2614 r = chown(device_node, uid, gid);
2616 log_error("failed to chown '%s' %u %u ", device_node, uid, gid);
2619 log_debug("chown '%s' %u %u", device_node, uid, gid);
2622 utimensat(AT_FDCWD, device_node, NULL, 0);
2632 /* fast-forward to next rule */
2633 cur = rule + rule->rule.token_count;
2640 fchmod(fileno(f), 0644);
2641 if (ferror(f) || rename(path, "/run/udev/static_node-tags") < 0) {
2643 unlink("/run/udev/static_node-tags");