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 void dump_token(struct udev_rules *rules, struct token *token) {}
444 static inline void dump_rules(struct udev_rules *rules) {}
447 static int add_token(struct udev_rules *rules, struct token *token)
449 /* grow buffer if needed */
450 if (rules->token_cur+1 >= rules->token_max) {
451 struct token *tokens;
454 /* double the buffer size */
455 add = rules->token_max;
459 tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
462 rules->tokens = tokens;
463 rules->token_max += add;
465 memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
470 static uid_t add_uid(struct udev_rules *rules, const char *owner)
476 /* lookup, if we know it already */
477 for (i = 0; i < rules->uids_cur; i++) {
478 off = rules->uids[i].name_off;
479 if (streq(rules_str(rules, off), owner)) {
480 uid = rules->uids[i].uid;
484 uid = util_lookup_user(rules->udev, owner);
486 /* grow buffer if needed */
487 if (rules->uids_cur+1 >= rules->uids_max) {
488 struct uid_gid *uids;
491 /* double the buffer size */
492 add = rules->uids_max;
496 uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
500 rules->uids_max += add;
502 rules->uids[rules->uids_cur].uid = uid;
503 off = rules_add_string(rules, owner);
506 rules->uids[rules->uids_cur].name_off = off;
511 static gid_t add_gid(struct udev_rules *rules, const char *group)
517 /* lookup, if we know it already */
518 for (i = 0; i < rules->gids_cur; i++) {
519 off = rules->gids[i].name_off;
520 if (streq(rules_str(rules, off), group)) {
521 gid = rules->gids[i].gid;
525 gid = util_lookup_group(rules->udev, group);
527 /* grow buffer if needed */
528 if (rules->gids_cur+1 >= rules->gids_max) {
529 struct uid_gid *gids;
532 /* double the buffer size */
533 add = rules->gids_max;
537 gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid));
541 rules->gids_max += add;
543 rules->gids[rules->gids_cur].gid = gid;
544 off = rules_add_string(rules, group);
547 rules->gids[rules->gids_cur].name_off = off;
552 static int import_property_from_string(struct udev_device *dev, char *line)
557 struct udev_list_entry *entry;
561 while (isspace(key[0]))
564 /* comment or empty line */
565 if (key[0] == '#' || key[0] == '\0')
568 /* split key/value */
569 val = strchr(key, '=');
576 while (isspace(val[0]))
583 while (isspace(key[len-1]))
587 /* terminate value */
591 while (isspace(val[len-1]))
599 if (val[0] == '"' || val[0] == '\'') {
600 if (val[len-1] != val[0]) {
601 log_debug("inconsistent quoting: '%s', skip", line);
608 entry = udev_device_add_property(dev, key, val);
609 /* store in db, skip private keys */
611 udev_list_entry_set_num(entry, true);
616 static int import_file_into_properties(struct udev_device *dev, const char *filename)
619 char line[UTIL_LINE_SIZE];
621 f = fopen(filename, "re");
624 while (fgets(line, sizeof(line), f) != NULL)
625 import_property_from_string(dev, line);
630 static int import_program_into_properties(struct udev_event *event, const char *program, const sigset_t *sigmask)
632 struct udev_device *dev = event->dev;
634 char result[UTIL_LINE_SIZE];
638 envp = udev_device_get_properties_envp(dev);
639 err = udev_event_spawn(event, program, envp, sigmask, result, sizeof(result));
644 while (line != NULL) {
647 pos = strchr(line, '\n');
652 import_property_from_string(dev, line);
658 static int import_parent_into_properties(struct udev_device *dev, const char *filter)
660 struct udev_device *dev_parent;
661 struct udev_list_entry *list_entry;
663 dev_parent = udev_device_get_parent(dev);
664 if (dev_parent == NULL)
667 udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
668 const char *key = udev_list_entry_get_name(list_entry);
669 const char *val = udev_list_entry_get_value(list_entry);
671 if (fnmatch(filter, key, 0) == 0) {
672 struct udev_list_entry *entry;
674 entry = udev_device_add_property(dev, key, val);
675 /* store in db, skip private keys */
677 udev_list_entry_set_num(entry, true);
683 #define WAIT_LOOP_PER_SECOND 50
684 static int wait_for_file(struct udev_device *dev, const char *file, int timeout)
686 char filepath[UTIL_PATH_SIZE];
687 char devicepath[UTIL_PATH_SIZE];
689 int loop = timeout * WAIT_LOOP_PER_SECOND;
691 /* a relative path is a device attribute */
692 devicepath[0] = '\0';
693 if (file[0] != '/') {
694 strscpyl(devicepath, sizeof(devicepath), udev_device_get_syspath(dev), NULL);
695 strscpyl(filepath, sizeof(filepath), devicepath, "/", file, NULL);
700 const struct timespec duration = { 0, 1000 * 1000 * 1000 / WAIT_LOOP_PER_SECOND };
703 if (stat(file, &stats) == 0) {
704 log_debug("file '%s' appeared after %i loops", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
707 /* make sure, the device did not disappear in the meantime */
708 if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
709 log_debug("device disappeared while waiting for '%s'", file);
712 log_debug("wait for '%s' for %i mseconds", file, 1000 / WAIT_LOOP_PER_SECOND);
713 nanosleep(&duration, NULL);
715 log_debug("waiting for '%s' failed", file);
719 static int attr_subst_subdir(char *attr, size_t len)
723 if (strstr(attr, "/*/")) {
725 char dirname[UTIL_PATH_SIZE];
729 strscpy(dirname, sizeof(dirname), attr);
730 pos = strstr(dirname, "/*/");
735 dir = opendir(dirname);
739 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
742 if (dent->d_name[0] == '.')
744 strscpyl(attr, len, dirname, "/", dent->d_name, tail, NULL);
745 if (stat(attr, &stats) == 0) {
757 static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value)
763 if (linepos == NULL || linepos[0] == '\0')
766 /* skip whitespace */
767 while (isspace(linepos[0]) || linepos[0] == ',')
771 if (linepos[0] == '\0')
777 if (linepos[0] == '\0')
779 if (isspace(linepos[0]))
781 if (linepos[0] == '=')
783 if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
784 if (linepos[1] == '=')
788 /* remember end of key */
791 /* skip whitespace after key */
792 while (isspace(linepos[0]))
794 if (linepos[0] == '\0')
797 /* get operation type */
798 if (linepos[0] == '=' && linepos[1] == '=') {
801 } else if (linepos[0] == '!' && linepos[1] == '=') {
804 } else if (linepos[0] == '+' && linepos[1] == '=') {
807 } else if (linepos[0] == '=') {
810 } else if (linepos[0] == ':' && linepos[1] == '=') {
811 *op = OP_ASSIGN_FINAL;
819 /* skip whitespace after operator */
820 while (isspace(linepos[0]))
822 if (linepos[0] == '\0')
826 if (linepos[0] == '"')
833 temp = strchr(linepos, '"');
839 /* move line to next key */
844 /* extract possible KEY{attr} */
845 static const char *get_key_attribute(struct udev *udev, char *str)
850 attr = strchr(str, '{');
853 pos = strchr(attr, '}');
855 log_error("missing closing brace for format");
864 static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
865 enum operation_type op,
866 const char *value, const void *data)
868 struct token *token = &rule_tmp->token[rule_tmp->token_cur];
869 const char *attr = NULL;
871 memzero(token, sizeof(struct token));
883 case TK_M_SUBSYSTEMS:
887 case TK_M_IMPORT_FILE:
888 case TK_M_IMPORT_PROG:
890 case TK_M_IMPORT_CMDLINE:
891 case TK_M_IMPORT_PARENT:
901 case TK_A_STATIC_NODE:
902 token->key.value_off = rules_add_string(rule_tmp->rules, value);
904 case TK_M_IMPORT_BUILTIN:
905 token->key.value_off = rules_add_string(rule_tmp->rules, value);
906 token->key.builtin_cmd = *(enum udev_builtin_cmd *)data;
915 token->key.value_off = rules_add_string(rule_tmp->rules, value);
916 token->key.attr_off = rules_add_string(rule_tmp->rules, attr);
919 token->key.value_off = rules_add_string(rule_tmp->rules, value);
921 token->key.mode = *(mode_t *)data;
923 case TK_A_STRING_ESCAPE_NONE:
924 case TK_A_STRING_ESCAPE_REPLACE:
925 case TK_A_DB_PERSIST:
927 case TK_A_RUN_BUILTIN:
928 case TK_A_RUN_PROGRAM:
929 token->key.builtin_cmd = *(enum udev_builtin_cmd *)data;
930 token->key.value_off = rules_add_string(rule_tmp->rules, value);
932 case TK_A_INOTIFY_WATCH:
933 case TK_A_DEVLINK_PRIO:
934 token->key.devlink_prio = *(int *)data;
937 token->key.uid = *(uid_t *)data;
940 token->key.gid = *(gid_t *)data;
943 token->key.mode = *(mode_t *)data;
945 case TK_M_EVENT_TIMEOUT:
946 token->key.event_timeout = *(int *)data;
949 case TK_M_PARENTS_MIN:
950 case TK_M_PARENTS_MAX:
954 log_error("wrong type %u", type);
958 if (value != NULL && type < TK_M_MAX) {
959 /* check if we need to split or call fnmatch() while matching rules */
960 enum string_glob_type glob;
964 has_split = (strchr(value, '|') != NULL);
965 has_glob = string_is_glob(value);
966 if (has_split && has_glob) {
967 glob = GL_SPLIT_GLOB;
968 } else if (has_split) {
970 } else if (has_glob) {
971 if (streq(value, "?*"))
978 token->key.glob = glob;
981 if (value != NULL && type > TK_M_MAX) {
982 /* check if assigned value has substitution chars */
984 token->key.subst = SB_SUBSYS;
985 else if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
986 token->key.subst = SB_FORMAT;
988 token->key.subst = SB_NONE;
992 /* check if property/attribute name has substitution chars */
994 token->key.attrsubst = SB_SUBSYS;
995 else if (strchr(attr, '%') != NULL || strchr(attr, '$') != NULL)
996 token->key.attrsubst = SB_FORMAT;
998 token->key.attrsubst = SB_NONE;
1001 token->key.type = type;
1003 rule_tmp->token_cur++;
1004 if (rule_tmp->token_cur >= ELEMENTSOF(rule_tmp->token)) {
1005 log_error("temporary rule array too small");
1011 static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp)
1014 unsigned int start = 0;
1015 unsigned int end = rule_tmp->token_cur;
1017 for (i = 0; i < rule_tmp->token_cur; i++) {
1018 enum token_type next_val = TK_UNSET;
1019 unsigned int next_idx = 0;
1022 /* find smallest value */
1023 for (j = start; j < end; j++) {
1024 if (rule_tmp->token[j].type == TK_UNSET)
1026 if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
1027 next_val = rule_tmp->token[j].type;
1032 /* add token and mark done */
1033 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
1035 rule_tmp->token[next_idx].type = TK_UNSET;
1038 if (next_idx == start)
1040 if (next_idx+1 == end)
1046 static int add_rule(struct udev_rules *rules, char *line,
1047 const char *filename, unsigned int filename_off, unsigned int lineno)
1051 struct rule_tmp rule_tmp;
1053 memzero(&rule_tmp, sizeof(struct rule_tmp));
1054 rule_tmp.rules = rules;
1055 rule_tmp.rule.type = TK_RULE;
1056 /* the offset in the rule is limited to unsigned short */
1057 if (filename_off < USHRT_MAX)
1058 rule_tmp.rule.rule.filename_off = filename_off;
1059 rule_tmp.rule.rule.filename_line = lineno;
1065 enum operation_type op;
1067 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0) {
1068 /* Avoid erroring on trailing whitespace. This is probably rare
1069 * so save the work for the error case instead of always trying
1070 * to strip the trailing whitespace with strstrip(). */
1071 while (isblank(*linepos))
1074 /* If we aren't at the end of the line, this is a parsing error.
1075 * Make a best effort to describe where the problem is. */
1076 if (*linepos != '\n') {
1077 char buf[2] = {linepos[1]};
1078 _cleanup_free_ char *tmp;
1081 log_error("invalid key/value pair in file %s on line %u,"
1082 "starting at character %tu ('%s')\n",
1083 filename, lineno, linepos - line + 1, tmp);
1084 if (linepos[1] == '#')
1085 log_error("hint: comments can only start at beginning of line");
1090 if (streq(key, "ACTION")) {
1091 if (op > OP_MATCH_MAX) {
1092 log_error("invalid ACTION operation");
1095 rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL);
1099 if (streq(key, "DEVPATH")) {
1100 if (op > OP_MATCH_MAX) {
1101 log_error("invalid DEVPATH operation");
1104 rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
1108 if (streq(key, "KERNEL")) {
1109 if (op > OP_MATCH_MAX) {
1110 log_error("invalid KERNEL operation");
1113 rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL);
1117 if (streq(key, "SUBSYSTEM")) {
1118 if (op > OP_MATCH_MAX) {
1119 log_error("invalid SUBSYSTEM operation");
1122 /* bus, class, subsystem events should all be the same */
1123 if (streq(value, "subsystem") ||
1124 streq(value, "bus") ||
1125 streq(value, "class")) {
1126 if (streq(value, "bus") || streq(value, "class"))
1127 log_error("'%s' must be specified as 'subsystem' "
1128 "please fix it in %s:%u", value, filename, lineno);
1129 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
1131 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
1135 if (streq(key, "DRIVER")) {
1136 if (op > OP_MATCH_MAX) {
1137 log_error("invalid DRIVER operation");
1140 rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL);
1144 if (startswith(key, "ATTR{")) {
1145 attr = get_key_attribute(rules->udev, key + strlen("ATTR"));
1147 log_error("error parsing ATTR attribute");
1150 if (op < OP_MATCH_MAX) {
1151 rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
1153 rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr);
1158 if (startswith(key, "SECLABEL{")) {
1159 attr = get_key_attribute(rules->udev, key + strlen("SECLABEL"));
1161 log_error("error parsing SECLABEL attribute");
1165 rule_add_key(&rule_tmp, TK_A_SECLABEL, op, value, attr);
1169 if (streq(key, "KERNELS")) {
1170 if (op > OP_MATCH_MAX) {
1171 log_error("invalid KERNELS operation");
1174 rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1178 if (streq(key, "SUBSYSTEMS")) {
1179 if (op > OP_MATCH_MAX) {
1180 log_error("invalid SUBSYSTEMS operation");
1183 rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1187 if (streq(key, "DRIVERS")) {
1188 if (op > OP_MATCH_MAX) {
1189 log_error("invalid DRIVERS operation");
1192 rule_add_key(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
1196 if (startswith(key, "ATTRS{")) {
1197 if (op > OP_MATCH_MAX) {
1198 log_error("invalid ATTRS operation");
1201 attr = get_key_attribute(rules->udev, key + strlen("ATTRS"));
1203 log_error("error parsing ATTRS attribute");
1206 if (startswith(attr, "device/"))
1207 log_error("the 'device' link may not be available in a future kernel, "
1208 "please fix it in %s:%u", filename, lineno);
1209 else if (strstr(attr, "../") != NULL)
1210 log_error("do not reference parent sysfs directories directly, "
1211 "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
1212 rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1216 if (streq(key, "TAGS")) {
1217 if (op > OP_MATCH_MAX) {
1218 log_error("invalid TAGS operation");
1221 rule_add_key(&rule_tmp, TK_M_TAGS, op, value, NULL);
1225 if (startswith(key, "ENV{")) {
1226 attr = get_key_attribute(rules->udev, key + strlen("ENV"));
1228 log_error("error parsing ENV attribute");
1231 if (op < OP_MATCH_MAX) {
1232 if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
1235 static const char *blacklist[] = {
1250 for (i = 0; i < ELEMENTSOF(blacklist); i++) {
1251 if (!streq(attr, blacklist[i]))
1253 log_error("invalid ENV attribute, '%s' can not be set %s:%u", attr, filename, lineno);
1256 if (rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
1262 if (streq(key, "TAG")) {
1263 if (op < OP_MATCH_MAX)
1264 rule_add_key(&rule_tmp, TK_M_TAG, op, value, NULL);
1266 rule_add_key(&rule_tmp, TK_A_TAG, op, value, NULL);
1270 if (streq(key, "PROGRAM")) {
1271 rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
1275 if (streq(key, "RESULT")) {
1276 if (op > OP_MATCH_MAX) {
1277 log_error("invalid RESULT operation");
1280 rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL);
1284 if (startswith(key, "IMPORT")) {
1285 attr = get_key_attribute(rules->udev, key + strlen("IMPORT"));
1287 log_error("IMPORT{} type missing, ignoring IMPORT %s:%u", filename, lineno);
1290 if (streq(attr, "program")) {
1291 /* find known built-in command */
1292 if (value[0] != '/') {
1293 enum udev_builtin_cmd cmd;
1295 cmd = udev_builtin_lookup(value);
1296 if (cmd < UDEV_BUILTIN_MAX) {
1297 log_debug("IMPORT found builtin '%s', replacing %s:%u",
1298 value, filename, lineno);
1299 rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, value, &cmd);
1303 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1304 } else if (streq(attr, "builtin")) {
1305 enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
1307 if (cmd < UDEV_BUILTIN_MAX)
1308 rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, value, &cmd);
1310 log_error("IMPORT{builtin}: '%s' unknown %s:%u", value, filename, lineno);
1311 } else if (streq(attr, "file")) {
1312 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1313 } else if (streq(attr, "db")) {
1314 rule_add_key(&rule_tmp, TK_M_IMPORT_DB, op, value, NULL);
1315 } else if (streq(attr, "cmdline")) {
1316 rule_add_key(&rule_tmp, TK_M_IMPORT_CMDLINE, op, value, NULL);
1317 } else if (streq(attr, "parent")) {
1318 rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
1320 log_error("IMPORT{} unknown type, ignoring IMPORT %s:%u", filename, lineno);
1324 if (startswith(key, "TEST")) {
1327 if (op > OP_MATCH_MAX) {
1328 log_error("invalid TEST operation");
1331 attr = get_key_attribute(rules->udev, key + strlen("TEST"));
1333 mode = strtol(attr, NULL, 8);
1334 rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode);
1336 rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL);
1341 if (startswith(key, "RUN")) {
1342 attr = get_key_attribute(rules->udev, key + strlen("RUN"));
1346 if (streq(attr, "builtin")) {
1347 enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
1349 if (cmd < UDEV_BUILTIN_MAX)
1350 rule_add_key(&rule_tmp, TK_A_RUN_BUILTIN, op, value, &cmd);
1352 log_error("IMPORT{builtin}: '%s' unknown %s:%u", value, filename, lineno);
1353 } else if (streq(attr, "program")) {
1354 enum udev_builtin_cmd cmd = UDEV_BUILTIN_MAX;
1356 rule_add_key(&rule_tmp, TK_A_RUN_PROGRAM, op, value, &cmd);
1358 log_error("RUN{} unknown type, ignoring RUN %s:%u", filename, lineno);
1364 if (streq(key, "WAIT_FOR") || streq(key, "WAIT_FOR_SYSFS")) {
1365 rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1369 if (streq(key, "LABEL")) {
1370 rule_tmp.rule.rule.label_off = rules_add_string(rules, value);
1374 if (streq(key, "GOTO")) {
1375 rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1379 if (startswith(key, "NAME")) {
1380 if (op < OP_MATCH_MAX) {
1381 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
1383 if (streq(value, "%k")) {
1384 log_error("NAME=\"%%k\" is ignored, because it breaks kernel supplied names, "
1385 "please remove it from %s:%u\n", filename, lineno);
1388 if (value[0] == '\0') {
1389 log_debug("NAME=\"\" is ignored, because udev will not delete any device nodes, "
1390 "please remove it from %s:%u\n", filename, lineno);
1393 rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL);
1395 rule_tmp.rule.rule.can_set_name = true;
1399 if (streq(key, "SYMLINK")) {
1400 if (op < OP_MATCH_MAX)
1401 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
1403 rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, NULL);
1404 rule_tmp.rule.rule.can_set_name = true;
1408 if (streq(key, "OWNER")) {
1412 uid = strtoul(value, &endptr, 10);
1413 if (endptr[0] == '\0') {
1414 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1415 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1416 uid = add_uid(rules, value);
1417 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1418 } else if (rules->resolve_names >= 0) {
1419 rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
1421 rule_tmp.rule.rule.can_set_name = true;
1425 if (streq(key, "GROUP")) {
1429 gid = strtoul(value, &endptr, 10);
1430 if (endptr[0] == '\0') {
1431 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1432 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1433 gid = add_gid(rules, value);
1434 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1435 } else if (rules->resolve_names >= 0) {
1436 rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
1438 rule_tmp.rule.rule.can_set_name = true;
1442 if (streq(key, "MODE")) {
1446 mode = strtol(value, &endptr, 8);
1447 if (endptr[0] == '\0')
1448 rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1450 rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
1451 rule_tmp.rule.rule.can_set_name = true;
1455 if (streq(key, "OPTIONS")) {
1458 pos = strstr(value, "link_priority=");
1460 int prio = atoi(&pos[strlen("link_priority=")]);
1462 rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, op, NULL, &prio);
1465 pos = strstr(value, "event_timeout=");
1467 int tout = atoi(&pos[strlen("event_timeout=")]);
1469 rule_add_key(&rule_tmp, TK_M_EVENT_TIMEOUT, op, NULL, &tout);
1472 pos = strstr(value, "string_escape=");
1474 pos = &pos[strlen("string_escape=")];
1475 if (startswith(pos, "none"))
1476 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, op, NULL, NULL);
1477 else if (startswith(pos, "replace"))
1478 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, op, NULL, NULL);
1481 pos = strstr(value, "db_persist");
1483 rule_add_key(&rule_tmp, TK_A_DB_PERSIST, op, NULL, NULL);
1485 pos = strstr(value, "nowatch");
1489 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &off);
1491 pos = strstr(value, "watch");
1495 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &on);
1499 pos = strstr(value, "static_node=");
1501 rule_add_key(&rule_tmp, TK_A_STATIC_NODE, op, &pos[strlen("static_node=")], NULL);
1502 rule_tmp.rule.rule.has_static_node = true;
1508 log_error("unknown key '%s' in %s:%u", key, filename, lineno);
1512 /* add rule token */
1513 rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur;
1514 if (add_token(rules, &rule_tmp.rule) != 0)
1517 /* add tokens to list, sorted by type */
1518 if (sort_token(rules, &rule_tmp) != 0)
1523 log_error("invalid rule '%s:%u'", filename, lineno);
1527 static int parse_file(struct udev_rules *rules, const char *filename)
1530 unsigned int first_token;
1531 unsigned int filename_off;
1532 char line[UTIL_LINE_SIZE];
1536 f = fopen(filename, "re");
1538 if (errno == ENOENT)
1544 if (null_or_empty_fd(fileno(f))) {
1545 log_debug("Skipping empty file: %s", filename);
1548 log_debug("Reading rules file: %s", filename);
1550 first_token = rules->token_cur;
1551 filename_off = rules_add_string(rules, filename);
1553 while (fgets(line, sizeof(line), f) != NULL) {
1557 /* skip whitespace */
1560 while (isspace(key[0]))
1571 /* continue reading if backslash+newline is found */
1572 while (line[len-2] == '\\') {
1573 if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1575 if (strlen(&line[len-2]) < 2)
1581 if (len+1 >= sizeof(line)) {
1582 log_error("line too long '%s':%u, ignored", filename, line_nr);
1585 add_rule(rules, key, filename, filename_off, line_nr);
1589 /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1590 for (i = first_token+1; i < rules->token_cur; i++) {
1591 if (rules->tokens[i].type == TK_A_GOTO) {
1592 char *label = rules_str(rules, rules->tokens[i].key.value_off);
1595 for (j = i+1; j < rules->token_cur; j++) {
1596 if (rules->tokens[j].type != TK_RULE)
1598 if (rules->tokens[j].rule.label_off == 0)
1600 if (!streq(label, rules_str(rules, rules->tokens[j].rule.label_off)))
1602 rules->tokens[i].key.rule_goto = j;
1605 if (rules->tokens[i].key.rule_goto == 0)
1606 log_error("GOTO '%s' has no matching label in: '%s'", label, filename);
1612 struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
1614 struct udev_rules *rules;
1615 struct udev_list file_list;
1616 struct token end_token;
1620 rules = new0(struct udev_rules, 1);
1624 rules->resolve_names = resolve_names;
1625 udev_list_init(udev, &file_list, true);
1627 /* init token array and string buffer */
1628 rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
1629 if (rules->tokens == NULL)
1630 return udev_rules_unref(rules);
1631 rules->token_max = PREALLOC_TOKEN;
1633 rules->strbuf = strbuf_new();
1635 return udev_rules_unref(rules);
1637 udev_rules_check_timestamp(rules);
1639 r = conf_files_list_strv(&files, ".rules", NULL, rules_dirs);
1641 log_error("failed to enumerate rules files: %s", strerror(-r));
1642 return udev_rules_unref(rules);
1646 * The offset value in the rules strct is limited; add all
1647 * rules file names to the beginning of the string buffer.
1649 STRV_FOREACH(f, files)
1650 rules_add_string(rules, *f);
1652 STRV_FOREACH(f, files)
1653 parse_file(rules, *f);
1657 memzero(&end_token, sizeof(struct token));
1658 end_token.type = TK_END;
1659 add_token(rules, &end_token);
1660 log_debug("rules contain %zu bytes tokens (%u * %zu bytes), %zu bytes strings",
1661 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->strbuf->len);
1663 /* cleanup temporary strbuf data */
1664 log_debug("%zu strings (%zu bytes), %zu de-duplicated (%zu bytes), %zu trie nodes used",
1665 rules->strbuf->in_count, rules->strbuf->in_len,
1666 rules->strbuf->dedup_count, rules->strbuf->dedup_len, rules->strbuf->nodes_count);
1667 strbuf_complete(rules->strbuf);
1669 /* cleanup uid/gid cache */
1672 rules->uids_cur = 0;
1673 rules->uids_max = 0;
1676 rules->gids_cur = 0;
1677 rules->gids_max = 0;
1683 struct udev_rules *udev_rules_unref(struct udev_rules *rules)
1687 free(rules->tokens);
1688 strbuf_cleanup(rules->strbuf);
1695 bool udev_rules_check_timestamp(struct udev_rules *rules)
1700 return paths_check_timestamp(rules_dirs, &rules->dirs_ts_usec, true);
1703 static int match_key(struct udev_rules *rules, struct token *token, const char *val)
1705 char *key_value = rules_str(rules, token->key.value_off);
1712 switch (token->key.glob) {
1714 match = (streq(key_value, val));
1717 match = (fnmatch(key_value, val, 0) == 0);
1724 s = rules_str(rules, token->key.value_off);
1729 next = strchr(s, '|');
1731 size_t matchlen = (size_t)(next - s);
1733 match = (matchlen == len && strneq(s, val, matchlen));
1737 match = (streq(s, val));
1746 char value[UTIL_PATH_SIZE];
1748 strscpy(value, sizeof(value), rules_str(rules, token->key.value_off));
1750 while (key_value != NULL) {
1751 pos = strchr(key_value, '|');
1756 match = (fnmatch(key_value, val, 0) == 0);
1764 match = (val[0] != '\0');
1770 if (match && (token->key.op == OP_MATCH))
1772 if (!match && (token->key.op == OP_NOMATCH))
1777 static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur)
1780 char nbuf[UTIL_NAME_SIZE];
1782 char vbuf[UTIL_NAME_SIZE];
1785 name = rules_str(rules, cur->key.attr_off);
1786 switch (cur->key.attrsubst) {
1788 udev_event_apply_format(event, name, nbuf, sizeof(nbuf));
1792 value = udev_device_get_sysattr_value(dev, name);
1797 if (util_resolve_subsys_kernel(event->udev, name, vbuf, sizeof(vbuf), 1) != 0)
1805 /* remove trailing whitespace, if not asked to match for it */
1806 len = strlen(value);
1807 if (len > 0 && isspace(value[len-1])) {
1808 const char *key_value;
1811 key_value = rules_str(rules, cur->key.value_off);
1812 klen = strlen(key_value);
1813 if (klen > 0 && !isspace(key_value[klen-1])) {
1814 if (value != vbuf) {
1815 strscpy(vbuf, sizeof(vbuf), value);
1818 while (len > 0 && isspace(vbuf[--len]))
1823 return match_key(rules, cur, value);
1832 int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event, const sigset_t *sigmask)
1836 enum escape_type esc = ESCAPE_UNSET;
1839 if (rules->tokens == NULL)
1842 can_set_name = ((!streq(udev_device_get_action(event->dev), "remove")) &&
1843 (major(udev_device_get_devnum(event->dev)) > 0 ||
1844 udev_device_get_ifindex(event->dev) > 0));
1846 /* loop through token list, match, run actions or forward to next rule */
1847 cur = &rules->tokens[0];
1850 dump_token(rules, cur);
1851 switch (cur->type) {
1855 /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
1856 if (!can_set_name && rule->rule.can_set_name)
1861 if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
1865 if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
1869 if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
1872 case TK_M_DEVLINK: {
1873 struct udev_list_entry *list_entry;
1876 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
1877 const char *devlink;
1879 devlink = udev_list_entry_get_name(list_entry) + strlen("/dev/");
1880 if (match_key(rules, cur, devlink) == 0) {
1890 if (match_key(rules, cur, event->name) != 0)
1894 const char *key_name = rules_str(rules, cur->key.attr_off);
1897 value = udev_device_get_property_value(event->dev, key_name);
1900 if (match_key(rules, cur, value))
1905 struct udev_list_entry *list_entry;
1908 udev_list_entry_foreach(list_entry, udev_device_get_tags_list_entry(event->dev)) {
1909 if (streq(rules_str(rules, cur->key.value_off), udev_list_entry_get_name(list_entry))) {
1914 if (!match && (cur->key.op != OP_NOMATCH))
1918 case TK_M_SUBSYSTEM:
1919 if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
1923 if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
1926 case TK_M_WAITFOR: {
1927 char filename[UTIL_PATH_SIZE];
1930 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), filename, sizeof(filename));
1931 found = (wait_for_file(event->dev, filename, 10) == 0);
1932 if (!found && (cur->key.op != OP_NOMATCH))
1937 if (match_attr(rules, event->dev, event, cur) != 0)
1941 case TK_M_SUBSYSTEMS:
1947 /* get whole sequence of parent matches */
1949 while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX)
1952 /* loop over parents */
1953 event->dev_parent = event->dev;
1957 /* loop over sequence of parent match keys */
1958 for (key = cur; key < next; key++ ) {
1959 dump_token(rules, key);
1962 if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
1965 case TK_M_SUBSYSTEMS:
1966 if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
1970 if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
1974 if (match_attr(rules, event->dev_parent, event, key) != 0)
1978 bool match = udev_device_has_tag(event->dev_parent, rules_str(rules, cur->key.value_off));
1980 if (match && key->key.op == OP_NOMATCH)
1982 if (!match && key->key.op == OP_MATCH)
1993 event->dev_parent = udev_device_get_parent(event->dev_parent);
1994 if (event->dev_parent == NULL)
1997 /* move behind our sequence of parent match keys */
2002 char filename[UTIL_PATH_SIZE];
2003 struct stat statbuf;
2006 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), filename, sizeof(filename));
2007 if (util_resolve_subsys_kernel(event->udev, filename, filename, sizeof(filename), 0) != 0) {
2008 if (filename[0] != '/') {
2009 char tmp[UTIL_PATH_SIZE];
2011 strscpy(tmp, sizeof(tmp), filename);
2012 strscpyl(filename, sizeof(filename),
2013 udev_device_get_syspath(event->dev), "/", tmp, NULL);
2016 attr_subst_subdir(filename, sizeof(filename));
2018 match = (stat(filename, &statbuf) == 0);
2019 if (match && cur->key.mode > 0)
2020 match = ((statbuf.st_mode & cur->key.mode) > 0);
2021 if (match && cur->key.op == OP_NOMATCH)
2023 if (!match && cur->key.op == OP_MATCH)
2027 case TK_M_EVENT_TIMEOUT:
2028 log_debug("OPTIONS event_timeout=%u", cur->key.event_timeout);
2029 event->timeout_usec = cur->key.event_timeout * 1000 * 1000;
2031 case TK_M_PROGRAM: {
2032 char program[UTIL_PATH_SIZE];
2034 char result[UTIL_LINE_SIZE];
2036 free(event->program_result);
2037 event->program_result = NULL;
2038 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), program, sizeof(program));
2039 envp = udev_device_get_properties_envp(event->dev);
2040 log_debug("PROGRAM '%s' %s:%u",
2042 rules_str(rules, rule->rule.filename_off),
2043 rule->rule.filename_line);
2045 if (udev_event_spawn(event, program, envp, sigmask, result, sizeof(result)) < 0) {
2046 if (cur->key.op != OP_NOMATCH)
2051 util_remove_trailing_chars(result, '\n');
2052 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2053 count = util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
2055 log_debug("%i character(s) replaced" , count);
2057 event->program_result = strdup(result);
2058 if (cur->key.op == OP_NOMATCH)
2063 case TK_M_IMPORT_FILE: {
2064 char import[UTIL_PATH_SIZE];
2066 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), import, sizeof(import));
2067 if (import_file_into_properties(event->dev, import) != 0)
2068 if (cur->key.op != OP_NOMATCH)
2072 case TK_M_IMPORT_PROG: {
2073 char import[UTIL_PATH_SIZE];
2075 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), import, sizeof(import));
2076 log_debug("IMPORT '%s' %s:%u",
2078 rules_str(rules, rule->rule.filename_off),
2079 rule->rule.filename_line);
2081 if (import_program_into_properties(event, import, sigmask) != 0)
2082 if (cur->key.op != OP_NOMATCH)
2086 case TK_M_IMPORT_BUILTIN: {
2087 char command[UTIL_PATH_SIZE];
2089 if (udev_builtin_run_once(cur->key.builtin_cmd)) {
2090 /* check if we ran already */
2091 if (event->builtin_run & (1 << cur->key.builtin_cmd)) {
2092 log_debug("IMPORT builtin skip '%s' %s:%u",
2093 udev_builtin_name(cur->key.builtin_cmd),
2094 rules_str(rules, rule->rule.filename_off),
2095 rule->rule.filename_line);
2096 /* return the result from earlier run */
2097 if (event->builtin_ret & (1 << cur->key.builtin_cmd))
2098 if (cur->key.op != OP_NOMATCH)
2103 event->builtin_run |= (1 << cur->key.builtin_cmd);
2106 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), command, sizeof(command));
2107 log_debug("IMPORT builtin '%s' %s:%u",
2108 udev_builtin_name(cur->key.builtin_cmd),
2109 rules_str(rules, rule->rule.filename_off),
2110 rule->rule.filename_line);
2112 if (udev_builtin_run(event->dev, cur->key.builtin_cmd, command, false) != 0) {
2113 /* remember failure */
2114 log_debug("IMPORT builtin '%s' returned non-zero",
2115 udev_builtin_name(cur->key.builtin_cmd));
2116 event->builtin_ret |= (1 << cur->key.builtin_cmd);
2117 if (cur->key.op != OP_NOMATCH)
2122 case TK_M_IMPORT_DB: {
2123 const char *key = rules_str(rules, cur->key.value_off);
2126 value = udev_device_get_property_value(event->dev_db, key);
2127 if (value != NULL) {
2128 struct udev_list_entry *entry;
2130 entry = udev_device_add_property(event->dev, key, value);
2131 udev_list_entry_set_num(entry, true);
2133 if (cur->key.op != OP_NOMATCH)
2138 case TK_M_IMPORT_CMDLINE: {
2140 bool imported = false;
2142 f = fopen("/proc/cmdline", "re");
2146 if (fgets(cmdline, sizeof(cmdline), f) != NULL) {
2147 const char *key = rules_str(rules, cur->key.value_off);
2150 pos = strstr(cmdline, key);
2152 struct udev_list_entry *entry;
2155 if (pos[0] == '\0' || isspace(pos[0])) {
2156 /* we import simple flags as 'FLAG=1' */
2157 entry = udev_device_add_property(event->dev, key, "1");
2158 udev_list_entry_set_num(entry, true);
2160 } else if (pos[0] == '=') {
2165 while (pos[0] != '\0' && !isspace(pos[0]))
2168 entry = udev_device_add_property(event->dev, key, value);
2169 udev_list_entry_set_num(entry, true);
2176 if (!imported && cur->key.op != OP_NOMATCH)
2180 case TK_M_IMPORT_PARENT: {
2181 char import[UTIL_PATH_SIZE];
2183 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), import, sizeof(import));
2184 if (import_parent_into_properties(event->dev, import) != 0)
2185 if (cur->key.op != OP_NOMATCH)
2190 if (match_key(rules, cur, event->program_result) != 0)
2193 case TK_A_STRING_ESCAPE_NONE:
2196 case TK_A_STRING_ESCAPE_REPLACE:
2197 esc = ESCAPE_REPLACE;
2199 case TK_A_DB_PERSIST:
2200 udev_device_set_db_persist(event->dev);
2202 case TK_A_INOTIFY_WATCH:
2203 if (event->inotify_watch_final)
2205 if (cur->key.op == OP_ASSIGN_FINAL)
2206 event->inotify_watch_final = true;
2207 event->inotify_watch = cur->key.watch;
2209 case TK_A_DEVLINK_PRIO:
2210 udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
2213 char owner[UTIL_NAME_SIZE];
2215 if (event->owner_final)
2217 if (cur->key.op == OP_ASSIGN_FINAL)
2218 event->owner_final = true;
2219 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), owner, sizeof(owner));
2220 event->owner_set = true;
2221 event->uid = util_lookup_user(event->udev, owner);
2222 log_debug("OWNER %u %s:%u",
2224 rules_str(rules, rule->rule.filename_off),
2225 rule->rule.filename_line);
2229 char group[UTIL_NAME_SIZE];
2231 if (event->group_final)
2233 if (cur->key.op == OP_ASSIGN_FINAL)
2234 event->group_final = true;
2235 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), group, sizeof(group));
2236 event->group_set = true;
2237 event->gid = util_lookup_group(event->udev, group);
2238 log_debug("GROUP %u %s:%u",
2240 rules_str(rules, rule->rule.filename_off),
2241 rule->rule.filename_line);
2245 char mode_str[UTIL_NAME_SIZE];
2249 if (event->mode_final)
2251 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), mode_str, sizeof(mode_str));
2252 mode = strtol(mode_str, &endptr, 8);
2253 if (endptr[0] != '\0') {
2254 log_error("ignoring invalid mode '%s'", mode_str);
2257 if (cur->key.op == OP_ASSIGN_FINAL)
2258 event->mode_final = true;
2259 event->mode_set = true;
2261 log_debug("MODE %#o %s:%u",
2263 rules_str(rules, rule->rule.filename_off),
2264 rule->rule.filename_line);
2268 if (event->owner_final)
2270 if (cur->key.op == OP_ASSIGN_FINAL)
2271 event->owner_final = true;
2272 event->owner_set = true;
2273 event->uid = cur->key.uid;
2274 log_debug("OWNER %u %s:%u",
2276 rules_str(rules, rule->rule.filename_off),
2277 rule->rule.filename_line);
2280 if (event->group_final)
2282 if (cur->key.op == OP_ASSIGN_FINAL)
2283 event->group_final = true;
2284 event->group_set = true;
2285 event->gid = cur->key.gid;
2286 log_debug("GROUP %u %s:%u",
2288 rules_str(rules, rule->rule.filename_off),
2289 rule->rule.filename_line);
2292 if (event->mode_final)
2294 if (cur->key.op == OP_ASSIGN_FINAL)
2295 event->mode_final = true;
2296 event->mode_set = true;
2297 event->mode = cur->key.mode;
2298 log_debug("MODE %#o %s:%u",
2300 rules_str(rules, rule->rule.filename_off),
2301 rule->rule.filename_line);
2303 case TK_A_SECLABEL: {
2304 const char *name, *label;
2306 name = rules_str(rules, cur->key.attr_off);
2307 label = rules_str(rules, cur->key.value_off);
2308 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2309 udev_list_cleanup(&event->seclabel_list);
2310 udev_list_entry_add(&event->seclabel_list, name, label);
2311 log_debug("SECLABEL{%s}='%s' %s:%u",
2313 rules_str(rules, rule->rule.filename_off),
2314 rule->rule.filename_line);
2318 const char *name = rules_str(rules, cur->key.attr_off);
2319 char *value = rules_str(rules, cur->key.value_off);
2320 char value_new[UTIL_NAME_SIZE];
2321 const char *value_old = NULL;
2322 struct udev_list_entry *entry;
2324 if (value[0] == '\0') {
2325 if (cur->key.op == OP_ADD)
2327 udev_device_add_property(event->dev, name, NULL);
2331 if (cur->key.op == OP_ADD)
2332 value_old = udev_device_get_property_value(event->dev, name);
2334 char temp[UTIL_NAME_SIZE];
2336 /* append value separated by space */
2337 udev_event_apply_format(event, value, temp, sizeof(temp));
2338 strscpyl(value_new, sizeof(value_new), value_old, " ", temp, NULL);
2340 udev_event_apply_format(event, value, value_new, sizeof(value_new));
2342 entry = udev_device_add_property(event->dev, name, value_new);
2343 /* store in db, skip private keys */
2345 udev_list_entry_set_num(entry, true);
2349 char tag[UTIL_PATH_SIZE];
2352 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), tag, sizeof(tag));
2353 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2354 udev_device_cleanup_tags_list(event->dev);
2355 for (p = tag; *p != '\0'; p++) {
2356 if ((*p >= 'a' && *p <= 'z') ||
2357 (*p >= 'A' && *p <= 'Z') ||
2358 (*p >= '0' && *p <= '9') ||
2359 *p == '-' || *p == '_')
2361 log_error("ignoring invalid tag name '%s'", tag);
2364 udev_device_add_tag(event->dev, tag);
2368 const char *name = rules_str(rules, cur->key.value_off);
2370 char name_str[UTIL_PATH_SIZE];
2373 if (event->name_final)
2375 if (cur->key.op == OP_ASSIGN_FINAL)
2376 event->name_final = true;
2377 udev_event_apply_format(event, name, name_str, sizeof(name_str));
2378 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2379 count = util_replace_chars(name_str, "/");
2381 log_debug("%i character(s) replaced", count);
2383 if (major(udev_device_get_devnum(event->dev)) &&
2384 (!streq(name_str, udev_device_get_devnode(event->dev) + strlen("/dev/")))) {
2385 log_error("NAME=\"%s\" ignored, kernel device nodes "
2386 "can not be renamed; please fix it in %s:%u\n", name,
2387 rules_str(rules, rule->rule.filename_off), rule->rule.filename_line);
2391 event->name = strdup(name_str);
2392 log_debug("NAME '%s' %s:%u",
2394 rules_str(rules, rule->rule.filename_off),
2395 rule->rule.filename_line);
2398 case TK_A_DEVLINK: {
2399 char temp[UTIL_PATH_SIZE];
2400 char filename[UTIL_PATH_SIZE];
2404 if (event->devlink_final)
2406 if (major(udev_device_get_devnum(event->dev)) == 0)
2408 if (cur->key.op == OP_ASSIGN_FINAL)
2409 event->devlink_final = true;
2410 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2411 udev_device_cleanup_devlinks_list(event->dev);
2413 /* allow multiple symlinks separated by spaces */
2414 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), temp, sizeof(temp));
2415 if (esc == ESCAPE_UNSET)
2416 count = util_replace_chars(temp, "/ ");
2417 else if (esc == ESCAPE_REPLACE)
2418 count = util_replace_chars(temp, "/");
2420 log_debug("%i character(s) replaced" , count);
2422 while (isspace(pos[0]))
2424 next = strchr(pos, ' ');
2425 while (next != NULL) {
2427 log_debug("LINK '%s' %s:%u", pos,
2428 rules_str(rules, rule->rule.filename_off), rule->rule.filename_line);
2429 strscpyl(filename, sizeof(filename), "/dev/", pos, NULL);
2430 udev_device_add_devlink(event->dev, filename);
2431 while (isspace(next[1]))
2434 next = strchr(pos, ' ');
2436 if (pos[0] != '\0') {
2437 log_debug("LINK '%s' %s:%u", pos,
2438 rules_str(rules, rule->rule.filename_off), rule->rule.filename_line);
2439 strscpyl(filename, sizeof(filename), "/dev/", pos, NULL);
2440 udev_device_add_devlink(event->dev, filename);
2445 const char *key_name = rules_str(rules, cur->key.attr_off);
2446 char attr[UTIL_PATH_SIZE];
2447 char value[UTIL_NAME_SIZE];
2450 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0)
2451 strscpyl(attr, sizeof(attr), udev_device_get_syspath(event->dev), "/", key_name, NULL);
2452 attr_subst_subdir(attr, sizeof(attr));
2454 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), value, sizeof(value));
2455 log_debug("ATTR '%s' writing '%s' %s:%u", attr, value,
2456 rules_str(rules, rule->rule.filename_off),
2457 rule->rule.filename_line);
2458 f = fopen(attr, "we");
2460 if (fprintf(f, "%s", value) <= 0)
2461 log_error("error writing ATTR{%s}: %m", attr);
2464 log_error("error opening ATTR{%s} for writing: %m", attr);
2468 case TK_A_RUN_BUILTIN:
2469 case TK_A_RUN_PROGRAM: {
2470 struct udev_list_entry *entry;
2472 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2473 udev_list_cleanup(&event->run_list);
2474 log_debug("RUN '%s' %s:%u",
2475 rules_str(rules, cur->key.value_off),
2476 rules_str(rules, rule->rule.filename_off),
2477 rule->rule.filename_line);
2478 entry = udev_list_entry_add(&event->run_list, rules_str(rules, cur->key.value_off), NULL);
2479 udev_list_entry_set_num(entry, cur->key.builtin_cmd);
2483 if (cur->key.rule_goto == 0)
2485 cur = &rules->tokens[cur->key.rule_goto];
2490 case TK_M_PARENTS_MIN:
2491 case TK_M_PARENTS_MAX:
2494 log_error("wrong type %u", cur->type);
2501 /* fast-forward to next rule */
2502 cur = rule + rule->rule.token_count;
2506 int udev_rules_apply_static_dev_perms(struct udev_rules *rules)
2513 _cleanup_strv_free_ char **tags = NULL;
2516 _cleanup_free_ char *path = NULL;
2519 if (rules->tokens == NULL)
2522 cur = &rules->tokens[0];
2525 switch (cur->type) {
2530 /* skip rules without a static_node tag */
2531 if (!rule->rule.has_static_node)
2547 mode = cur->key.mode;
2550 r = strv_extend(&tags, rules_str(rules, cur->key.value_off));
2555 case TK_A_STATIC_NODE: {
2556 char device_node[UTIL_PATH_SIZE];
2557 char tags_dir[UTIL_PATH_SIZE];
2558 char tag_symlink[UTIL_PATH_SIZE];
2561 /* we assure, that the permissions tokens are sorted before the static token */
2563 if (mode == 0 && uid == 0 && gid == 0 && tags == NULL)
2566 strscpyl(device_node, sizeof(device_node), "/dev/", rules_str(rules, cur->key.value_off), NULL);
2567 if (stat(device_node, &stats) != 0)
2569 if (!S_ISBLK(stats.st_mode) && !S_ISCHR(stats.st_mode))
2572 /* export the tags to a directory as symlinks, allowing otherwise dead nodes to be tagged */
2574 STRV_FOREACH(t, tags) {
2575 _cleanup_free_ char *unescaped_filename = NULL;
2577 strscpyl(tags_dir, sizeof(tags_dir), "/run/udev/static_node-tags/", *t, "/", NULL);
2578 r = mkdir_p(tags_dir, 0755);
2580 log_error("failed to create %s: %s", tags_dir, strerror(-r));
2584 unescaped_filename = xescape(rules_str(rules, cur->key.value_off), "/.");
2586 strscpyl(tag_symlink, sizeof(tag_symlink), tags_dir, unescaped_filename, NULL);
2587 r = symlink(device_node, tag_symlink);
2588 if (r < 0 && errno != EEXIST) {
2589 log_error("failed to create symlink %s -> %s: %m", tag_symlink, device_node);
2596 /* don't touch the permissions if only the tags were set */
2597 if (mode == 0 && uid == 0 && gid == 0)
2606 if (mode != (stats.st_mode & 01777)) {
2607 r = chmod(device_node, mode);
2609 log_error("failed to chmod '%s' %#o", device_node, mode);
2612 log_debug("chmod '%s' %#o", device_node, mode);
2615 if ((uid != 0 && uid != stats.st_uid) || (gid != 0 && gid != stats.st_gid)) {
2616 r = chown(device_node, uid, gid);
2618 log_error("failed to chown '%s' %u %u ", device_node, uid, gid);
2621 log_debug("chown '%s' %u %u", device_node, uid, gid);
2624 utimensat(AT_FDCWD, device_node, NULL, 0);
2634 /* fast-forward to next rule */
2635 cur = rule + rule->rule.token_count;
2642 fchmod(fileno(f), 0644);
2643 if (ferror(f) || rename(path, "/run/udev/static_node-tags") < 0) {
2645 unlink("/run/udev/static_node-tags");