2 * Copyright (C) 2003-2012 Kay Sievers <kay.sievers@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"
37 #define PREALLOC_TOKEN 2048
40 unsigned int name_off;
50 unsigned long long *dirs_ts_usec;
53 /* every key in the rules file becomes a token */
55 unsigned int token_cur;
56 unsigned int token_max;
58 /* all key strings are copied and de-duplicated in a single continous string buffer */
59 struct strbuf *strbuf;
61 /* during rule parsing, uid/gid lookup results are cached */
63 unsigned int uids_cur;
64 unsigned int uids_max;
66 unsigned int gids_cur;
67 unsigned int gids_max;
70 static char *rules_str(struct udev_rules *rules, unsigned int off) {
71 return rules->strbuf->buf + off;
74 static unsigned int rules_add_string(struct udev_rules *rules, const char *s) {
75 return strbuf_add_string(rules->strbuf, s, strlen(s));
78 /* KEY=="", KEY!="", KEY+="", KEY="", KEY:="" */
91 enum string_glob_type {
93 GL_PLAIN, /* no special chars */
94 GL_GLOB, /* shell globs ?,*,[] */
95 GL_SPLIT, /* multi-value A|B */
96 GL_SPLIT_GLOB, /* multi-value with glob A*|B* */
97 GL_SOMETHING, /* commonly used "?*" */
100 enum string_subst_type {
107 /* tokens of a rule are sorted/handled in this order */
112 TK_M_ACTION, /* val */
113 TK_M_DEVPATH, /* val */
114 TK_M_KERNEL, /* val */
115 TK_M_DEVLINK, /* val */
117 TK_M_ENV, /* val, attr */
119 TK_M_SUBSYSTEM, /* val */
120 TK_M_DRIVER, /* val */
121 TK_M_WAITFOR, /* val */
122 TK_M_ATTR, /* val, attr */
125 TK_M_KERNELS, /* val */
126 TK_M_SUBSYSTEMS, /* val */
127 TK_M_DRIVERS, /* val */
128 TK_M_ATTRS, /* val, attr */
132 TK_M_TEST, /* val, mode_t */
133 TK_M_EVENT_TIMEOUT, /* int */
134 TK_M_PROGRAM, /* val */
135 TK_M_IMPORT_FILE, /* val */
136 TK_M_IMPORT_PROG, /* val */
137 TK_M_IMPORT_BUILTIN, /* val */
138 TK_M_IMPORT_DB, /* val */
139 TK_M_IMPORT_CMDLINE, /* val */
140 TK_M_IMPORT_PARENT, /* val */
141 TK_M_RESULT, /* val */
144 TK_A_STRING_ESCAPE_NONE,
145 TK_A_STRING_ESCAPE_REPLACE,
147 TK_A_INOTIFY_WATCH, /* int */
148 TK_A_DEVLINK_PRIO, /* int */
149 TK_A_OWNER, /* val */
150 TK_A_GROUP, /* val */
152 TK_A_OWNER_ID, /* uid_t */
153 TK_A_GROUP_ID, /* gid_t */
154 TK_A_MODE_ID, /* mode_t */
155 TK_A_STATIC_NODE, /* val */
156 TK_A_ENV, /* val, attr */
159 TK_A_DEVLINK, /* val */
160 TK_A_ATTR, /* val, attr */
161 TK_A_RUN_BUILTIN, /* val, bool */
162 TK_A_RUN_PROGRAM, /* val, bool */
163 TK_A_GOTO, /* size_t */
168 /* we try to pack stuff in a way that we take only 12 bytes per token */
171 unsigned char type; /* same in rule and key */
173 enum token_type type:8;
175 bool has_static_node:1;
176 unsigned int unused:6;
177 unsigned short token_count;
178 unsigned int label_off;
179 unsigned short filename_off;
180 unsigned short filename_line;
183 enum token_type type:8;
184 enum operation_type op:8;
185 enum string_glob_type glob:8;
186 enum string_subst_type subst:4;
187 enum string_subst_type attrsubst:4;
188 unsigned int value_off;
190 unsigned int attr_off;
191 unsigned int rule_goto;
198 enum udev_builtin_cmd builtin_cmd;
206 struct udev_rules *rules;
208 struct token token[MAX_TK];
209 unsigned int token_cur;
213 static const char *operation_str(enum operation_type type)
215 static const char *operation_strs[] = {
216 [OP_UNSET] = "UNSET",
217 [OP_MATCH] = "match",
218 [OP_NOMATCH] = "nomatch",
219 [OP_MATCH_MAX] = "MATCH_MAX",
222 [OP_ASSIGN] = "assign",
223 [OP_ASSIGN_FINAL] = "assign-final",
226 return operation_strs[type];
229 static const char *string_glob_str(enum string_glob_type type)
231 static const char *string_glob_strs[] = {
232 [GL_UNSET] = "UNSET",
233 [GL_PLAIN] = "plain",
235 [GL_SPLIT] = "split",
236 [GL_SPLIT_GLOB] = "split-glob",
237 [GL_SOMETHING] = "split-glob",
240 return string_glob_strs[type];
243 static const char *token_str(enum token_type type)
245 static const char *token_strs[] = {
246 [TK_UNSET] = "UNSET",
249 [TK_M_ACTION] = "M ACTION",
250 [TK_M_DEVPATH] = "M DEVPATH",
251 [TK_M_KERNEL] = "M KERNEL",
252 [TK_M_DEVLINK] = "M DEVLINK",
253 [TK_M_NAME] = "M NAME",
254 [TK_M_ENV] = "M ENV",
255 [TK_M_TAG] = "M TAG",
256 [TK_M_SUBSYSTEM] = "M SUBSYSTEM",
257 [TK_M_DRIVER] = "M DRIVER",
258 [TK_M_WAITFOR] = "M WAITFOR",
259 [TK_M_ATTR] = "M ATTR",
261 [TK_M_PARENTS_MIN] = "M PARENTS_MIN",
262 [TK_M_KERNELS] = "M KERNELS",
263 [TK_M_SUBSYSTEMS] = "M SUBSYSTEMS",
264 [TK_M_DRIVERS] = "M DRIVERS",
265 [TK_M_ATTRS] = "M ATTRS",
266 [TK_M_TAGS] = "M TAGS",
267 [TK_M_PARENTS_MAX] = "M PARENTS_MAX",
269 [TK_M_TEST] = "M TEST",
270 [TK_M_EVENT_TIMEOUT] = "M EVENT_TIMEOUT",
271 [TK_M_PROGRAM] = "M PROGRAM",
272 [TK_M_IMPORT_FILE] = "M IMPORT_FILE",
273 [TK_M_IMPORT_PROG] = "M IMPORT_PROG",
274 [TK_M_IMPORT_BUILTIN] = "M IMPORT_BUILTIN",
275 [TK_M_IMPORT_DB] = "M IMPORT_DB",
276 [TK_M_IMPORT_CMDLINE] = "M IMPORT_CMDLINE",
277 [TK_M_IMPORT_PARENT] = "M IMPORT_PARENT",
278 [TK_M_RESULT] = "M RESULT",
279 [TK_M_MAX] = "M MAX",
281 [TK_A_STRING_ESCAPE_NONE] = "A STRING_ESCAPE_NONE",
282 [TK_A_STRING_ESCAPE_REPLACE] = "A STRING_ESCAPE_REPLACE",
283 [TK_A_DB_PERSIST] = "A DB_PERSIST",
284 [TK_A_INOTIFY_WATCH] = "A INOTIFY_WATCH",
285 [TK_A_DEVLINK_PRIO] = "A DEVLINK_PRIO",
286 [TK_A_OWNER] = "A OWNER",
287 [TK_A_GROUP] = "A GROUP",
288 [TK_A_MODE] = "A MODE",
289 [TK_A_OWNER_ID] = "A OWNER_ID",
290 [TK_A_GROUP_ID] = "A GROUP_ID",
291 [TK_A_STATIC_NODE] = "A STATIC_NODE",
292 [TK_A_MODE_ID] = "A MODE_ID",
293 [TK_A_ENV] = "A ENV",
294 [TK_A_TAG] = "A ENV",
295 [TK_A_NAME] = "A NAME",
296 [TK_A_DEVLINK] = "A DEVLINK",
297 [TK_A_ATTR] = "A ATTR",
298 [TK_A_RUN_BUILTIN] = "A RUN_BUILTIN",
299 [TK_A_RUN_PROGRAM] = "A RUN_PROGRAM",
300 [TK_A_GOTO] = "A GOTO",
305 return token_strs[type];
308 static void dump_token(struct udev_rules *rules, struct token *token)
310 enum token_type type = token->type;
311 enum operation_type op = token->key.op;
312 enum string_glob_type glob = token->key.glob;
313 const char *value = str(rules, token->key.value_off);
314 const char *attr = &rules->buf[token->key.attr_off];
319 const char *tks_ptr = (char *)rules->tokens;
320 const char *tk_ptr = (char *)token;
321 unsigned int idx = (tk_ptr - tks_ptr) / sizeof(struct token);
323 log_debug("* RULE %s:%u, token: %u, count: %u, label: '%s'\n",
324 &rules->buf[token->rule.filename_off], token->rule.filename_line,
325 idx, token->rule.token_count,
326 &rules->buf[token->rule.label_off]);
338 case TK_M_SUBSYSTEMS:
342 case TK_M_IMPORT_FILE:
343 case TK_M_IMPORT_PROG:
345 case TK_M_IMPORT_CMDLINE:
346 case TK_M_IMPORT_PARENT:
353 case TK_A_RUN_BUILTIN:
354 case TK_A_RUN_PROGRAM:
355 log_debug("%s %s '%s'(%s)\n",
356 token_str(type), operation_str(op), value, string_glob_str(glob));
358 case TK_M_IMPORT_BUILTIN:
359 log_debug("%s %i '%s'\n", token_str(type), token->key.builtin_cmd, value);
366 log_debug("%s %s '%s' '%s'(%s)\n",
367 token_str(type), operation_str(op), attr, value, string_glob_str(glob));
371 log_debug("%s %s '%s'\n", token_str(type), operation_str(op), value);
373 case TK_A_STRING_ESCAPE_NONE:
374 case TK_A_STRING_ESCAPE_REPLACE:
375 case TK_A_DB_PERSIST:
376 log_debug("%s\n", token_str(type));
379 log_debug("%s %s '%s'(%s) %#o\n",
380 token_str(type), operation_str(op), value, string_glob_str(glob), token->key.mode);
382 case TK_A_INOTIFY_WATCH:
383 log_debug("%s %u\n", token_str(type), token->key.watch);
385 case TK_A_DEVLINK_PRIO:
386 log_debug("%s %u\n", token_str(type), token->key.devlink_prio);
389 log_debug("%s %s %u\n", token_str(type), operation_str(op), token->key.uid);
392 log_debug("%s %s %u\n", token_str(type), operation_str(op), token->key.gid);
395 log_debug("%s %s %#o\n", token_str(type), operation_str(op), token->key.mode);
397 case TK_A_STATIC_NODE:
398 log_debug("%s '%s'\n", token_str(type), value);
400 case TK_M_EVENT_TIMEOUT:
401 log_debug("%s %u\n", token_str(type), token->key.event_timeout);
404 log_debug("%s '%s' %u\n", token_str(type), value, token->key.rule_goto);
407 log_debug("* %s\n", token_str(type));
409 case TK_M_PARENTS_MIN:
410 case TK_M_PARENTS_MAX:
413 log_debug("unknown type %u\n", type);
418 static void dump_rules(struct udev_rules *rules)
422 log_debug("dumping %u (%zu bytes) tokens, %u (%zu bytes) strings\n",
424 rules->token_cur * sizeof(struct token),
427 for(i = 0; i < rules->token_cur; i++)
428 dump_token(rules, &rules->tokens[i]);
431 static inline const char *operation_str(enum operation_type type) { return NULL; }
432 static inline const char *token_str(enum token_type type) { return NULL; }
433 static inline void dump_token(struct udev_rules *rules, struct token *token) {}
434 static inline void dump_rules(struct udev_rules *rules) {}
437 static int add_token(struct udev_rules *rules, struct token *token)
439 /* grow buffer if needed */
440 if (rules->token_cur+1 >= rules->token_max) {
441 struct token *tokens;
444 /* double the buffer size */
445 add = rules->token_max;
449 tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
452 rules->tokens = tokens;
453 rules->token_max += add;
455 memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
460 static uid_t add_uid(struct udev_rules *rules, const char *owner)
466 /* lookup, if we know it already */
467 for (i = 0; i < rules->uids_cur; i++) {
468 off = rules->uids[i].name_off;
469 if (streq(rules_str(rules, off), owner)) {
470 uid = rules->uids[i].uid;
474 uid = util_lookup_user(rules->udev, owner);
476 /* grow buffer if needed */
477 if (rules->uids_cur+1 >= rules->uids_max) {
478 struct uid_gid *uids;
481 /* double the buffer size */
482 add = rules->uids_max;
486 uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
490 rules->uids_max += add;
492 rules->uids[rules->uids_cur].uid = uid;
493 off = rules_add_string(rules, owner);
496 rules->uids[rules->uids_cur].name_off = off;
501 static gid_t add_gid(struct udev_rules *rules, const char *group)
507 /* lookup, if we know it already */
508 for (i = 0; i < rules->gids_cur; i++) {
509 off = rules->gids[i].name_off;
510 if (streq(rules_str(rules, off), group)) {
511 gid = rules->gids[i].gid;
515 gid = util_lookup_group(rules->udev, group);
517 /* grow buffer if needed */
518 if (rules->gids_cur+1 >= rules->gids_max) {
519 struct uid_gid *gids;
522 /* double the buffer size */
523 add = rules->gids_max;
527 gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid));
531 rules->gids_max += add;
533 rules->gids[rules->gids_cur].gid = gid;
534 off = rules_add_string(rules, group);
537 rules->gids[rules->gids_cur].name_off = off;
542 static int import_property_from_string(struct udev_device *dev, char *line)
550 while (isspace(key[0]))
553 /* comment or empty line */
554 if (key[0] == '#' || key[0] == '\0')
557 /* split key/value */
558 val = strchr(key, '=');
565 while (isspace(val[0]))
572 while (isspace(key[len-1]))
576 /* terminate value */
580 while (isspace(val[len-1]))
588 if (val[0] == '"' || val[0] == '\'') {
589 if (val[len-1] != val[0]) {
590 log_debug("inconsistent quoting: '%s', skip\n", line);
597 /* handle device, renamed by external tool, returning new path */
598 if (streq(key, "DEVPATH")) {
599 char syspath[UTIL_PATH_SIZE];
601 log_debug("updating devpath from '%s' to '%s'\n",
602 udev_device_get_devpath(dev), val);
603 util_strscpyl(syspath, sizeof(syspath), "/sys", val, NULL);
604 udev_device_set_syspath(dev, syspath);
606 struct udev_list_entry *entry;
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 util_strscpyl(devicepath, sizeof(devicepath), udev_device_get_syspath(dev), NULL);
695 util_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\n", 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'\n", file);
712 log_debug("wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND);
713 nanosleep(&duration, NULL);
715 log_debug("waiting for '%s' failed\n", file);
719 static int attr_subst_subdir(char *attr, size_t len)
723 if (strstr(attr, "/*/")) {
725 char dirname[UTIL_PATH_SIZE];
729 util_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 util_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\n");
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 memset(token, 0x00, 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 token->key.value_off = rules_add_string(rule_tmp->rules, value);
903 case TK_M_IMPORT_BUILTIN:
904 token->key.value_off = rules_add_string(rule_tmp->rules, value);
905 token->key.builtin_cmd = *(enum udev_builtin_cmd *)data;
913 token->key.value_off = rules_add_string(rule_tmp->rules, value);
914 token->key.attr_off = rules_add_string(rule_tmp->rules, attr);
917 token->key.value_off = rules_add_string(rule_tmp->rules, value);
919 token->key.mode = *(mode_t *)data;
921 case TK_A_STRING_ESCAPE_NONE:
922 case TK_A_STRING_ESCAPE_REPLACE:
923 case TK_A_DB_PERSIST:
925 case TK_A_RUN_BUILTIN:
926 case TK_A_RUN_PROGRAM:
927 token->key.builtin_cmd = *(enum udev_builtin_cmd *)data;
928 token->key.value_off = rules_add_string(rule_tmp->rules, value);
930 case TK_A_INOTIFY_WATCH:
931 case TK_A_DEVLINK_PRIO:
932 token->key.devlink_prio = *(int *)data;
935 token->key.uid = *(uid_t *)data;
938 token->key.gid = *(gid_t *)data;
941 token->key.mode = *(mode_t *)data;
943 case TK_A_STATIC_NODE:
944 token->key.value_off = rules_add_string(rule_tmp->rules, value);
946 case TK_M_EVENT_TIMEOUT:
947 token->key.event_timeout = *(int *)data;
950 case TK_M_PARENTS_MIN:
951 case TK_M_PARENTS_MAX:
955 log_error("wrong type %u\n", type);
959 if (value != NULL && type < TK_M_MAX) {
960 /* check if we need to split or call fnmatch() while matching rules */
961 enum string_glob_type glob;
965 has_split = (strchr(value, '|') != NULL);
966 has_glob = (strchr(value, '*') != NULL || strchr(value, '?') != NULL || strchr(value, '[') != NULL);
967 if (has_split && has_glob) {
968 glob = GL_SPLIT_GLOB;
969 } else if (has_split) {
971 } else if (has_glob) {
972 if (streq(value, "?*"))
979 token->key.glob = glob;
982 if (value != NULL && type > TK_M_MAX) {
983 /* check if assigned value has substitution chars */
985 token->key.subst = SB_SUBSYS;
986 else if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
987 token->key.subst = SB_FORMAT;
989 token->key.subst = SB_NONE;
993 /* check if property/attribut name has substitution chars */
995 token->key.attrsubst = SB_SUBSYS;
996 else if (strchr(attr, '%') != NULL || strchr(attr, '$') != NULL)
997 token->key.attrsubst = SB_FORMAT;
999 token->key.attrsubst = SB_NONE;
1002 token->key.type = type;
1004 rule_tmp->token_cur++;
1005 if (rule_tmp->token_cur >= ELEMENTSOF(rule_tmp->token)) {
1006 log_error("temporary rule array too small\n");
1012 static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp)
1015 unsigned int start = 0;
1016 unsigned int end = rule_tmp->token_cur;
1018 for (i = 0; i < rule_tmp->token_cur; i++) {
1019 enum token_type next_val = TK_UNSET;
1020 unsigned int next_idx = 0;
1023 /* find smallest value */
1024 for (j = start; j < end; j++) {
1025 if (rule_tmp->token[j].type == TK_UNSET)
1027 if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
1028 next_val = rule_tmp->token[j].type;
1033 /* add token and mark done */
1034 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
1036 rule_tmp->token[next_idx].type = TK_UNSET;
1039 if (next_idx == start)
1041 if (next_idx+1 == end)
1047 static int add_rule(struct udev_rules *rules, char *line,
1048 const char *filename, unsigned int filename_off, unsigned int lineno)
1052 struct rule_tmp rule_tmp;
1054 memset(&rule_tmp, 0x00, sizeof(struct rule_tmp));
1055 rule_tmp.rules = rules;
1056 rule_tmp.rule.type = TK_RULE;
1057 /* the offset in the rule is limited to unsigned short */
1058 if (filename_off < USHRT_MAX)
1059 rule_tmp.rule.rule.filename_off = filename_off;
1060 rule_tmp.rule.rule.filename_line = lineno;
1066 enum operation_type op;
1068 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0)
1071 if (streq(key, "ACTION")) {
1072 if (op > OP_MATCH_MAX) {
1073 log_error("invalid ACTION operation\n");
1076 rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL);
1080 if (streq(key, "DEVPATH")) {
1081 if (op > OP_MATCH_MAX) {
1082 log_error("invalid DEVPATH operation\n");
1085 rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
1089 if (streq(key, "KERNEL")) {
1090 if (op > OP_MATCH_MAX) {
1091 log_error("invalid KERNEL operation\n");
1094 rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL);
1098 if (streq(key, "SUBSYSTEM")) {
1099 if (op > OP_MATCH_MAX) {
1100 log_error("invalid SUBSYSTEM operation\n");
1103 /* bus, class, subsystem events should all be the same */
1104 if (streq(value, "subsystem") ||
1105 streq(value, "bus") ||
1106 streq(value, "class")) {
1107 if (streq(value, "bus") || streq(value, "class"))
1108 log_error("'%s' must be specified as 'subsystem' \n"
1109 "please fix it in %s:%u", value, filename, lineno);
1110 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
1112 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
1116 if (streq(key, "DRIVER")) {
1117 if (op > OP_MATCH_MAX) {
1118 log_error("invalid DRIVER operation\n");
1121 rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL);
1125 if (startswith(key, "ATTR{")) {
1126 attr = get_key_attribute(rules->udev, key + sizeof("ATTR")-1);
1128 log_error("error parsing ATTR attribute\n");
1131 if (op < OP_MATCH_MAX) {
1132 rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
1134 rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr);
1139 if (streq(key, "KERNELS")) {
1140 if (op > OP_MATCH_MAX) {
1141 log_error("invalid KERNELS operation\n");
1144 rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1148 if (streq(key, "SUBSYSTEMS")) {
1149 if (op > OP_MATCH_MAX) {
1150 log_error("invalid SUBSYSTEMS operation\n");
1153 rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1157 if (streq(key, "DRIVERS")) {
1158 if (op > OP_MATCH_MAX) {
1159 log_error("invalid DRIVERS operation\n");
1162 rule_add_key(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
1166 if (startswith(key, "ATTRS{")) {
1167 if (op > OP_MATCH_MAX) {
1168 log_error("invalid ATTRS operation\n");
1171 attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
1173 log_error("error parsing ATTRS attribute\n");
1176 if (startswith(attr, "device/"))
1177 log_error("the 'device' link may not be available in a future kernel, "
1178 "please fix it in %s:%u", filename, lineno);
1179 else if (strstr(attr, "../") != NULL)
1180 log_error("do not reference parent sysfs directories directly, "
1181 "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
1182 rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1186 if (streq(key, "TAGS")) {
1187 if (op > OP_MATCH_MAX) {
1188 log_error("invalid TAGS operation\n");
1191 rule_add_key(&rule_tmp, TK_M_TAGS, op, value, NULL);
1195 if (startswith(key, "ENV{")) {
1196 attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1);
1198 log_error("error parsing ENV attribute\n");
1201 if (op < OP_MATCH_MAX) {
1202 if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
1205 static const char *blacklist[] = {
1220 for (i = 0; i < ELEMENTSOF(blacklist); i++) {
1221 if (!streq(attr, blacklist[i]))
1223 log_error("invalid ENV attribute, '%s' can not be set %s:%u\n", attr, filename, lineno);
1226 if (rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
1232 if (streq(key, "TAG")) {
1233 if (op < OP_MATCH_MAX)
1234 rule_add_key(&rule_tmp, TK_M_TAG, op, value, NULL);
1236 rule_add_key(&rule_tmp, TK_A_TAG, op, value, NULL);
1240 if (streq(key, "PROGRAM")) {
1241 rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
1245 if (streq(key, "RESULT")) {
1246 if (op > OP_MATCH_MAX) {
1247 log_error("invalid RESULT operation\n");
1250 rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL);
1254 if (startswith(key, "IMPORT")) {
1255 attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1);
1257 log_error("IMPORT{} type missing, ignoring IMPORT %s:%u\n", filename, lineno);
1260 if (streq(attr, "program")) {
1261 /* find known built-in command */
1262 if (value[0] != '/') {
1263 enum udev_builtin_cmd cmd;
1265 cmd = udev_builtin_lookup(value);
1266 if (cmd < UDEV_BUILTIN_MAX) {
1267 log_debug("IMPORT found builtin '%s', replacing %s:%u\n",
1268 value, filename, lineno);
1269 rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, value, &cmd);
1273 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1274 } else if (streq(attr, "builtin")) {
1275 enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
1277 if (cmd < UDEV_BUILTIN_MAX)
1278 rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, value, &cmd);
1280 log_error("IMPORT{builtin}: '%s' unknown %s:%u\n", value, filename, lineno);
1281 } else if (streq(attr, "file")) {
1282 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1283 } else if (streq(attr, "db")) {
1284 rule_add_key(&rule_tmp, TK_M_IMPORT_DB, op, value, NULL);
1285 } else if (streq(attr, "cmdline")) {
1286 rule_add_key(&rule_tmp, TK_M_IMPORT_CMDLINE, op, value, NULL);
1287 } else if (streq(attr, "parent")) {
1288 rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
1290 log_error("IMPORT{} unknown type, ignoring IMPORT %s:%u\n", filename, lineno);
1294 if (startswith(key, "TEST")) {
1297 if (op > OP_MATCH_MAX) {
1298 log_error("invalid TEST operation\n");
1301 attr = get_key_attribute(rules->udev, key + sizeof("TEST")-1);
1303 mode = strtol(attr, NULL, 8);
1304 rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode);
1306 rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL);
1311 if (startswith(key, "RUN")) {
1312 attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1);
1316 if (streq(attr, "builtin")) {
1317 enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
1319 if (cmd < UDEV_BUILTIN_MAX)
1320 rule_add_key(&rule_tmp, TK_A_RUN_BUILTIN, op, value, &cmd);
1322 log_error("IMPORT{builtin}: '%s' unknown %s:%u\n", value, filename, lineno);
1323 } else if (streq(attr, "program")) {
1324 enum udev_builtin_cmd cmd = UDEV_BUILTIN_MAX;
1326 rule_add_key(&rule_tmp, TK_A_RUN_PROGRAM, op, value, &cmd);
1328 log_error("RUN{} unknown type, ignoring RUN %s:%u\n", filename, lineno);
1334 if (streq(key, "WAIT_FOR") || streq(key, "WAIT_FOR_SYSFS")) {
1335 rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1339 if (streq(key, "LABEL")) {
1340 rule_tmp.rule.rule.label_off = rules_add_string(rules, value);
1344 if (streq(key, "GOTO")) {
1345 rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1349 if (startswith(key, "NAME")) {
1350 if (op < OP_MATCH_MAX) {
1351 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
1353 if (streq(value, "%k")) {
1354 log_error("NAME=\"%%k\" is ignored, because it breaks kernel supplied names, "
1355 "please remove it from %s:%u\n", filename, lineno);
1358 if (value[0] == '\0') {
1359 log_debug("NAME=\"\" is ignored, because udev will not delete any device nodes, "
1360 "please remove it from %s:%u\n", filename, lineno);
1363 rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL);
1365 rule_tmp.rule.rule.can_set_name = true;
1369 if (streq(key, "SYMLINK")) {
1370 if (op < OP_MATCH_MAX)
1371 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
1373 rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, NULL);
1374 rule_tmp.rule.rule.can_set_name = true;
1378 if (streq(key, "OWNER")) {
1382 uid = strtoul(value, &endptr, 10);
1383 if (endptr[0] == '\0') {
1384 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1385 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1386 uid = add_uid(rules, value);
1387 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1388 } else if (rules->resolve_names >= 0) {
1389 rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
1391 rule_tmp.rule.rule.can_set_name = true;
1395 if (streq(key, "GROUP")) {
1399 gid = strtoul(value, &endptr, 10);
1400 if (endptr[0] == '\0') {
1401 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1402 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1403 gid = add_gid(rules, value);
1404 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1405 } else if (rules->resolve_names >= 0) {
1406 rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
1408 rule_tmp.rule.rule.can_set_name = true;
1412 if (streq(key, "MODE")) {
1416 mode = strtol(value, &endptr, 8);
1417 if (endptr[0] == '\0')
1418 rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1420 rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
1421 rule_tmp.rule.rule.can_set_name = true;
1425 if (streq(key, "OPTIONS")) {
1428 pos = strstr(value, "link_priority=");
1430 int prio = atoi(&pos[strlen("link_priority=")]);
1432 rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, op, NULL, &prio);
1435 pos = strstr(value, "event_timeout=");
1437 int tout = atoi(&pos[strlen("event_timeout=")]);
1439 rule_add_key(&rule_tmp, TK_M_EVENT_TIMEOUT, op, NULL, &tout);
1442 pos = strstr(value, "string_escape=");
1444 pos = &pos[strlen("string_escape=")];
1445 if (startswith(pos, "none"))
1446 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, op, NULL, NULL);
1447 else if (startswith(pos, "replace"))
1448 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, op, NULL, NULL);
1451 pos = strstr(value, "db_persist");
1453 rule_add_key(&rule_tmp, TK_A_DB_PERSIST, op, NULL, NULL);
1455 pos = strstr(value, "nowatch");
1459 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &off);
1461 pos = strstr(value, "watch");
1465 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &on);
1469 pos = strstr(value, "static_node=");
1471 rule_add_key(&rule_tmp, TK_A_STATIC_NODE, op, &pos[strlen("static_node=")], NULL);
1472 rule_tmp.rule.rule.has_static_node = true;
1478 log_error("unknown key '%s' in %s:%u\n", key, filename, lineno);
1482 /* add rule token */
1483 rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur;
1484 if (add_token(rules, &rule_tmp.rule) != 0)
1487 /* add tokens to list, sorted by type */
1488 if (sort_token(rules, &rule_tmp) != 0)
1493 log_error("invalid rule '%s:%u'\n", filename, lineno);
1497 static int parse_file(struct udev_rules *rules, const char *filename)
1500 unsigned int first_token;
1501 unsigned int filename_off;
1502 char line[UTIL_LINE_SIZE];
1506 if (null_or_empty_path(filename)) {
1507 log_debug("skip empty file: %s\n", filename);
1510 log_debug("read rules file: %s\n", filename);
1512 f = fopen(filename, "re");
1516 first_token = rules->token_cur;
1517 filename_off = rules_add_string(rules, filename);
1519 while (fgets(line, sizeof(line), f) != NULL) {
1523 /* skip whitespace */
1526 while (isspace(key[0]))
1537 /* continue reading if backslash+newline is found */
1538 while (line[len-2] == '\\') {
1539 if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1541 if (strlen(&line[len-2]) < 2)
1547 if (len+1 >= sizeof(line)) {
1548 log_error("line too long '%s':%u, ignored\n", filename, line_nr);
1551 add_rule(rules, key, filename, filename_off, line_nr);
1555 /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1556 for (i = first_token+1; i < rules->token_cur; i++) {
1557 if (rules->tokens[i].type == TK_A_GOTO) {
1558 char *label = rules_str(rules, rules->tokens[i].key.value_off);
1561 for (j = i+1; j < rules->token_cur; j++) {
1562 if (rules->tokens[j].type != TK_RULE)
1564 if (rules->tokens[j].rule.label_off == 0)
1566 if (!streq(label, rules_str(rules, rules->tokens[j].rule.label_off)))
1568 rules->tokens[i].key.rule_goto = j;
1571 if (rules->tokens[i].key.rule_goto == 0)
1572 log_error("GOTO '%s' has no matching label in: '%s'\n", label, filename);
1578 struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
1580 struct udev_rules *rules;
1581 struct udev_list file_list;
1582 struct token end_token;
1586 rules = calloc(1, sizeof(struct udev_rules));
1590 rules->resolve_names = resolve_names;
1591 udev_list_init(udev, &file_list, true);
1593 /* init token array and string buffer */
1594 rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
1595 if (rules->tokens == NULL)
1596 return udev_rules_unref(rules);
1597 rules->token_max = PREALLOC_TOKEN;
1599 rules->strbuf = strbuf_new();
1601 return udev_rules_unref(rules);
1603 rules->dirs = strv_new(SYSCONFDIR "/udev/rules.d",
1604 "/run/udev/rules.d",
1605 UDEVLIBEXECDIR "/rules.d",
1608 log_error("failed to build config directory array");
1609 return udev_rules_unref(rules);
1611 if (!path_strv_canonicalize(rules->dirs)) {
1612 log_error("failed to canonicalize config directories\n");
1613 return udev_rules_unref(rules);
1615 strv_uniq(rules->dirs);
1617 rules->dirs_ts_usec = calloc(strv_length(rules->dirs), sizeof(long long));
1618 if(!rules->dirs_ts_usec)
1619 return udev_rules_unref(rules);
1620 udev_rules_check_timestamp(rules);
1622 r = conf_files_list_strv(&files, ".rules", (const char **)rules->dirs);
1624 log_error("failed to enumerate rules files: %s\n", strerror(-r));
1625 return udev_rules_unref(rules);
1629 * The offset value in the rules strct is limited; add all
1630 * rules file names to the beginning of the string buffer.
1632 STRV_FOREACH(f, files)
1633 rules_add_string(rules, *f);
1635 STRV_FOREACH(f, files)
1636 parse_file(rules, *f);
1640 memset(&end_token, 0x00, sizeof(struct token));
1641 end_token.type = TK_END;
1642 add_token(rules, &end_token);
1643 log_debug("rules contain %zu bytes tokens (%u * %zu bytes), %zu bytes strings\n",
1644 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->strbuf->len);
1646 /* cleanup temporary strbuf data */
1647 log_debug("%zu strings (%zu bytes), %zu de-duplicated (%zu bytes), %zu trie nodes used\n",
1648 rules->strbuf->in_count, rules->strbuf->in_len,
1649 rules->strbuf->dedup_count, rules->strbuf->dedup_len, rules->strbuf->nodes_count);
1650 strbuf_complete(rules->strbuf);
1652 /* cleanup uid/gid cache */
1655 rules->uids_cur = 0;
1656 rules->uids_max = 0;
1659 rules->gids_cur = 0;
1660 rules->gids_max = 0;
1666 struct udev_rules *udev_rules_unref(struct udev_rules *rules)
1670 free(rules->tokens);
1671 strbuf_cleanup(rules->strbuf);
1674 strv_free(rules->dirs);
1675 free(rules->dirs_ts_usec);
1680 bool udev_rules_check_timestamp(struct udev_rules *rules)
1683 bool changed = false;
1688 for (i = 0; rules->dirs[i]; i++) {
1691 if (stat(rules->dirs[i], &stats) < 0)
1694 if (rules->dirs_ts_usec[i] == ts_usec(&stats.st_mtim))
1698 if (rules->dirs_ts_usec[i] != 0) {
1699 log_debug("reload - timestamp of '%s' changed\n", rules->dirs[i]);
1703 /* update timestamp */
1704 rules->dirs_ts_usec[i] = ts_usec(&stats.st_mtim);
1710 static int match_key(struct udev_rules *rules, struct token *token, const char *val)
1712 char *key_value = rules_str(rules, token->key.value_off);
1719 switch (token->key.glob) {
1721 match = (streq(key_value, val));
1724 match = (fnmatch(key_value, val, 0) == 0);
1731 s = rules_str(rules, token->key.value_off);
1736 next = strchr(s, '|');
1738 size_t matchlen = (size_t)(next - s);
1740 match = (matchlen == len && strncmp(s, val, matchlen) == 0);
1744 match = (streq(s, val));
1753 char value[UTIL_PATH_SIZE];
1755 util_strscpy(value, sizeof(value), rules_str(rules, token->key.value_off));
1757 while (key_value != NULL) {
1758 pos = strchr(key_value, '|');
1763 match = (fnmatch(key_value, val, 0) == 0);
1771 match = (val[0] != '\0');
1777 if (match && (token->key.op == OP_MATCH))
1779 if (!match && (token->key.op == OP_NOMATCH))
1784 static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur)
1787 char nbuf[UTIL_NAME_SIZE];
1789 char vbuf[UTIL_NAME_SIZE];
1792 name = rules_str(rules, cur->key.attr_off);
1793 switch (cur->key.attrsubst) {
1795 udev_event_apply_format(event, name, nbuf, sizeof(nbuf));
1799 value = udev_device_get_sysattr_value(dev, name);
1804 if (util_resolve_subsys_kernel(event->udev, name, vbuf, sizeof(vbuf), 1) != 0)
1812 /* remove trailing whitespace, if not asked to match for it */
1813 len = strlen(value);
1814 if (len > 0 && isspace(value[len-1])) {
1815 const char *key_value;
1818 key_value = rules_str(rules, cur->key.value_off);
1819 klen = strlen(key_value);
1820 if (klen > 0 && !isspace(key_value[klen-1])) {
1821 if (value != vbuf) {
1822 util_strscpy(vbuf, sizeof(vbuf), value);
1825 while (len > 0 && isspace(vbuf[--len]))
1830 return match_key(rules, cur, value);
1839 int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event, const sigset_t *sigmask)
1843 enum escape_type esc = ESCAPE_UNSET;
1846 if (rules->tokens == NULL)
1849 can_set_name = ((!streq(udev_device_get_action(event->dev), "remove")) &&
1850 (major(udev_device_get_devnum(event->dev)) > 0 ||
1851 udev_device_get_ifindex(event->dev) > 0));
1853 /* loop through token list, match, run actions or forward to next rule */
1854 cur = &rules->tokens[0];
1857 dump_token(rules, cur);
1858 switch (cur->type) {
1862 /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
1863 if (!can_set_name && rule->rule.can_set_name)
1868 if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
1872 if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
1876 if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
1879 case TK_M_DEVLINK: {
1880 struct udev_list_entry *list_entry;
1883 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
1884 const char *devlink;
1886 devlink = udev_list_entry_get_name(list_entry) + strlen("/dev/");
1887 if (match_key(rules, cur, devlink) == 0) {
1897 if (match_key(rules, cur, event->name) != 0)
1901 const char *key_name = rules_str(rules, cur->key.attr_off);
1904 value = udev_device_get_property_value(event->dev, key_name);
1907 if (match_key(rules, cur, value))
1912 struct udev_list_entry *list_entry;
1915 udev_list_entry_foreach(list_entry, udev_device_get_tags_list_entry(event->dev)) {
1916 if (streq(rules_str(rules, cur->key.value_off), udev_list_entry_get_name(list_entry))) {
1921 if (!match && (cur->key.op != OP_NOMATCH))
1925 case TK_M_SUBSYSTEM:
1926 if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
1930 if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
1933 case TK_M_WAITFOR: {
1934 char filename[UTIL_PATH_SIZE];
1937 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), filename, sizeof(filename));
1938 found = (wait_for_file(event->dev, filename, 10) == 0);
1939 if (!found && (cur->key.op != OP_NOMATCH))
1944 if (match_attr(rules, event->dev, event, cur) != 0)
1948 case TK_M_SUBSYSTEMS:
1954 /* get whole sequence of parent matches */
1956 while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX)
1959 /* loop over parents */
1960 event->dev_parent = event->dev;
1964 /* loop over sequence of parent match keys */
1965 for (key = cur; key < next; key++ ) {
1966 dump_token(rules, key);
1969 if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
1972 case TK_M_SUBSYSTEMS:
1973 if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
1977 if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
1981 if (match_attr(rules, event->dev_parent, event, key) != 0)
1985 bool match = udev_device_has_tag(event->dev_parent, rules_str(rules, cur->key.value_off));
1987 if (match && key->key.op == OP_NOMATCH)
1989 if (!match && key->key.op == OP_MATCH)
2000 event->dev_parent = udev_device_get_parent(event->dev_parent);
2001 if (event->dev_parent == NULL)
2004 /* move behind our sequence of parent match keys */
2009 char filename[UTIL_PATH_SIZE];
2010 struct stat statbuf;
2013 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), filename, sizeof(filename));
2014 if (util_resolve_subsys_kernel(event->udev, filename, filename, sizeof(filename), 0) != 0) {
2015 if (filename[0] != '/') {
2016 char tmp[UTIL_PATH_SIZE];
2018 util_strscpy(tmp, sizeof(tmp), filename);
2019 util_strscpyl(filename, sizeof(filename),
2020 udev_device_get_syspath(event->dev), "/", tmp, NULL);
2023 attr_subst_subdir(filename, sizeof(filename));
2025 match = (stat(filename, &statbuf) == 0);
2026 if (match && cur->key.mode > 0)
2027 match = ((statbuf.st_mode & cur->key.mode) > 0);
2028 if (match && cur->key.op == OP_NOMATCH)
2030 if (!match && cur->key.op == OP_MATCH)
2034 case TK_M_EVENT_TIMEOUT:
2035 log_debug("OPTIONS event_timeout=%u\n", cur->key.event_timeout);
2036 event->timeout_usec = cur->key.event_timeout * 1000 * 1000;
2038 case TK_M_PROGRAM: {
2039 char program[UTIL_PATH_SIZE];
2041 char result[UTIL_PATH_SIZE];
2043 free(event->program_result);
2044 event->program_result = NULL;
2045 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), program, sizeof(program));
2046 envp = udev_device_get_properties_envp(event->dev);
2047 log_debug("PROGRAM '%s' %s:%u\n",
2049 rules_str(rules, rule->rule.filename_off),
2050 rule->rule.filename_line);
2052 if (udev_event_spawn(event, program, envp, sigmask, result, sizeof(result)) < 0) {
2053 if (cur->key.op != OP_NOMATCH)
2058 util_remove_trailing_chars(result, '\n');
2059 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2060 count = util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
2062 log_debug("%i character(s) replaced\n" , count);
2064 event->program_result = strdup(result);
2065 if (cur->key.op == OP_NOMATCH)
2070 case TK_M_IMPORT_FILE: {
2071 char import[UTIL_PATH_SIZE];
2073 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), import, sizeof(import));
2074 if (import_file_into_properties(event->dev, import) != 0)
2075 if (cur->key.op != OP_NOMATCH)
2079 case TK_M_IMPORT_PROG: {
2080 char import[UTIL_PATH_SIZE];
2082 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), import, sizeof(import));
2083 log_debug("IMPORT '%s' %s:%u\n",
2085 rules_str(rules, rule->rule.filename_off),
2086 rule->rule.filename_line);
2088 if (import_program_into_properties(event, import, sigmask) != 0)
2089 if (cur->key.op != OP_NOMATCH)
2093 case TK_M_IMPORT_BUILTIN: {
2094 char command[UTIL_PATH_SIZE];
2096 if (udev_builtin_run_once(cur->key.builtin_cmd)) {
2097 /* check if we ran already */
2098 if (event->builtin_run & (1 << cur->key.builtin_cmd)) {
2099 log_debug("IMPORT builtin skip '%s' %s:%u\n",
2100 udev_builtin_name(cur->key.builtin_cmd),
2101 rules_str(rules, rule->rule.filename_off),
2102 rule->rule.filename_line);
2103 /* return the result from earlier run */
2104 if (event->builtin_ret & (1 << cur->key.builtin_cmd))
2105 if (cur->key.op != OP_NOMATCH)
2110 event->builtin_run |= (1 << cur->key.builtin_cmd);
2113 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), command, sizeof(command));
2114 log_debug("IMPORT builtin '%s' %s:%u\n",
2115 udev_builtin_name(cur->key.builtin_cmd),
2116 rules_str(rules, rule->rule.filename_off),
2117 rule->rule.filename_line);
2119 if (udev_builtin_run(event->dev, cur->key.builtin_cmd, command, false) != 0) {
2120 /* remember failure */
2121 log_debug("IMPORT builtin '%s' returned non-zero\n",
2122 udev_builtin_name(cur->key.builtin_cmd));
2123 event->builtin_ret |= (1 << cur->key.builtin_cmd);
2124 if (cur->key.op != OP_NOMATCH)
2129 case TK_M_IMPORT_DB: {
2130 const char *key = rules_str(rules, cur->key.value_off);
2133 value = udev_device_get_property_value(event->dev_db, key);
2134 if (value != NULL) {
2135 struct udev_list_entry *entry;
2137 entry = udev_device_add_property(event->dev, key, value);
2138 udev_list_entry_set_num(entry, true);
2140 if (cur->key.op != OP_NOMATCH)
2145 case TK_M_IMPORT_CMDLINE: {
2147 bool imported = false;
2149 f = fopen("/proc/cmdline", "re");
2153 if (fgets(cmdline, sizeof(cmdline), f) != NULL) {
2154 const char *key = rules_str(rules, cur->key.value_off);
2157 pos = strstr(cmdline, key);
2159 struct udev_list_entry *entry;
2162 if (pos[0] == '\0' || isspace(pos[0])) {
2163 /* we import simple flags as 'FLAG=1' */
2164 entry = udev_device_add_property(event->dev, key, "1");
2165 udev_list_entry_set_num(entry, true);
2167 } else if (pos[0] == '=') {
2172 while (pos[0] != '\0' && !isspace(pos[0]))
2175 entry = udev_device_add_property(event->dev, key, value);
2176 udev_list_entry_set_num(entry, true);
2183 if (!imported && cur->key.op != OP_NOMATCH)
2187 case TK_M_IMPORT_PARENT: {
2188 char import[UTIL_PATH_SIZE];
2190 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), import, sizeof(import));
2191 if (import_parent_into_properties(event->dev, import) != 0)
2192 if (cur->key.op != OP_NOMATCH)
2197 if (match_key(rules, cur, event->program_result) != 0)
2200 case TK_A_STRING_ESCAPE_NONE:
2203 case TK_A_STRING_ESCAPE_REPLACE:
2204 esc = ESCAPE_REPLACE;
2206 case TK_A_DB_PERSIST:
2207 udev_device_set_db_persist(event->dev);
2209 case TK_A_INOTIFY_WATCH:
2210 if (event->inotify_watch_final)
2212 if (cur->key.op == OP_ASSIGN_FINAL)
2213 event->inotify_watch_final = true;
2214 event->inotify_watch = cur->key.watch;
2216 case TK_A_DEVLINK_PRIO:
2217 udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
2220 char owner[UTIL_NAME_SIZE];
2222 if (event->owner_final)
2224 if (cur->key.op == OP_ASSIGN_FINAL)
2225 event->owner_final = true;
2226 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), owner, sizeof(owner));
2227 event->uid = util_lookup_user(event->udev, owner);
2228 log_debug("OWNER %u %s:%u\n",
2230 rules_str(rules, rule->rule.filename_off),
2231 rule->rule.filename_line);
2235 char group[UTIL_NAME_SIZE];
2237 if (event->group_final)
2239 if (cur->key.op == OP_ASSIGN_FINAL)
2240 event->group_final = true;
2241 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), group, sizeof(group));
2242 event->gid = util_lookup_group(event->udev, group);
2243 log_debug("GROUP %u %s:%u\n",
2245 rules_str(rules, rule->rule.filename_off),
2246 rule->rule.filename_line);
2250 char mode_str[UTIL_NAME_SIZE];
2254 if (event->mode_final)
2256 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), mode_str, sizeof(mode_str));
2257 mode = strtol(mode_str, &endptr, 8);
2258 if (endptr[0] != '\0') {
2259 log_error("ignoring invalid mode '%s'\n", mode_str);
2262 if (cur->key.op == OP_ASSIGN_FINAL)
2263 event->mode_final = true;
2264 event->mode_set = true;
2266 log_debug("MODE %#o %s:%u\n",
2268 rules_str(rules, rule->rule.filename_off),
2269 rule->rule.filename_line);
2273 if (event->owner_final)
2275 if (cur->key.op == OP_ASSIGN_FINAL)
2276 event->owner_final = true;
2277 event->uid = cur->key.uid;
2278 log_debug("OWNER %u %s:%u\n",
2280 rules_str(rules, rule->rule.filename_off),
2281 rule->rule.filename_line);
2284 if (event->group_final)
2286 if (cur->key.op == OP_ASSIGN_FINAL)
2287 event->group_final = true;
2288 event->gid = cur->key.gid;
2289 log_debug("GROUP %u %s:%u\n",
2291 rules_str(rules, rule->rule.filename_off),
2292 rule->rule.filename_line);
2295 if (event->mode_final)
2297 if (cur->key.op == OP_ASSIGN_FINAL)
2298 event->mode_final = true;
2299 event->mode_set = true;
2300 event->mode = cur->key.mode;
2301 log_debug("MODE %#o %s:%u\n",
2303 rules_str(rules, rule->rule.filename_off),
2304 rule->rule.filename_line);
2307 const char *name = rules_str(rules, cur->key.attr_off);
2308 char *value = rules_str(rules, cur->key.value_off);
2309 char value_new[UTIL_NAME_SIZE];
2310 const char *value_old = NULL;
2311 struct udev_list_entry *entry;
2313 if (value[0] == '\0') {
2314 if (cur->key.op == OP_ADD)
2316 udev_device_add_property(event->dev, name, NULL);
2320 if (cur->key.op == OP_ADD)
2321 value_old = udev_device_get_property_value(event->dev, name);
2323 char temp[UTIL_NAME_SIZE];
2325 /* append value separated by space */
2326 udev_event_apply_format(event, value, temp, sizeof(temp));
2327 util_strscpyl(value_new, sizeof(value_new), value_old, " ", temp, NULL);
2329 udev_event_apply_format(event, value, value_new, sizeof(value_new));
2331 entry = udev_device_add_property(event->dev, name, value_new);
2332 /* store in db, skip private keys */
2334 udev_list_entry_set_num(entry, true);
2338 char tag[UTIL_PATH_SIZE];
2341 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), tag, sizeof(tag));
2342 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2343 udev_device_cleanup_tags_list(event->dev);
2344 for (p = tag; *p != '\0'; p++) {
2345 if ((*p >= 'a' && *p <= 'z') ||
2346 (*p >= 'A' && *p <= 'Z') ||
2347 (*p >= '0' && *p <= '9') ||
2348 *p == '-' || *p == '_')
2350 log_error("ignoring invalid tag name '%s'\n", tag);
2353 udev_device_add_tag(event->dev, tag);
2357 const char *name = rules_str(rules, cur->key.value_off);
2359 char name_str[UTIL_PATH_SIZE];
2362 if (event->name_final)
2364 if (cur->key.op == OP_ASSIGN_FINAL)
2365 event->name_final = true;
2366 udev_event_apply_format(event, name, name_str, sizeof(name_str));
2367 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2368 count = util_replace_chars(name_str, "/");
2370 log_debug("%i character(s) replaced\n", count);
2372 if (major(udev_device_get_devnum(event->dev)) &&
2373 (!streq(name_str, udev_device_get_devnode(event->dev) + strlen("/dev/")))) {
2374 log_error("NAME=\"%s\" ignored, kernel device nodes "
2375 "can not be renamed; please fix it in %s:%u\n", name,
2376 rules_str(rules, rule->rule.filename_off), rule->rule.filename_line);
2380 event->name = strdup(name_str);
2381 log_debug("NAME '%s' %s:%u\n",
2383 rules_str(rules, rule->rule.filename_off),
2384 rule->rule.filename_line);
2387 case TK_A_DEVLINK: {
2388 char temp[UTIL_PATH_SIZE];
2389 char filename[UTIL_PATH_SIZE];
2393 if (event->devlink_final)
2395 if (major(udev_device_get_devnum(event->dev)) == 0)
2397 if (cur->key.op == OP_ASSIGN_FINAL)
2398 event->devlink_final = true;
2399 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2400 udev_device_cleanup_devlinks_list(event->dev);
2402 /* allow multiple symlinks separated by spaces */
2403 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), temp, sizeof(temp));
2404 if (esc == ESCAPE_UNSET)
2405 count = util_replace_chars(temp, "/ ");
2406 else if (esc == ESCAPE_REPLACE)
2407 count = util_replace_chars(temp, "/");
2409 log_debug("%i character(s) replaced\n" , count);
2411 while (isspace(pos[0]))
2413 next = strchr(pos, ' ');
2414 while (next != NULL) {
2416 log_debug("LINK '%s' %s:%u\n", pos,
2417 rules_str(rules, rule->rule.filename_off), rule->rule.filename_line);
2418 util_strscpyl(filename, sizeof(filename), "/dev/", pos, NULL);
2419 udev_device_add_devlink(event->dev, filename);
2420 while (isspace(next[1]))
2423 next = strchr(pos, ' ');
2425 if (pos[0] != '\0') {
2426 log_debug("LINK '%s' %s:%u\n", pos,
2427 rules_str(rules, rule->rule.filename_off), rule->rule.filename_line);
2428 util_strscpyl(filename, sizeof(filename), "/dev/", pos, NULL);
2429 udev_device_add_devlink(event->dev, filename);
2434 const char *key_name = rules_str(rules, cur->key.attr_off);
2435 char attr[UTIL_PATH_SIZE];
2436 char value[UTIL_NAME_SIZE];
2439 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0)
2440 util_strscpyl(attr, sizeof(attr), udev_device_get_syspath(event->dev), "/", key_name, NULL);
2441 attr_subst_subdir(attr, sizeof(attr));
2443 udev_event_apply_format(event, rules_str(rules, cur->key.value_off), value, sizeof(value));
2444 log_debug("ATTR '%s' writing '%s' %s:%u\n", attr, value,
2445 rules_str(rules, rule->rule.filename_off),
2446 rule->rule.filename_line);
2447 f = fopen(attr, "we");
2449 if (fprintf(f, "%s", value) <= 0)
2450 log_error("error writing ATTR{%s}: %m\n", attr);
2453 log_error("error opening ATTR{%s} for writing: %m\n", attr);
2457 case TK_A_RUN_BUILTIN:
2458 case TK_A_RUN_PROGRAM: {
2459 struct udev_list_entry *entry;
2461 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2462 udev_list_cleanup(&event->run_list);
2463 log_debug("RUN '%s' %s:%u\n",
2464 rules_str(rules, cur->key.value_off),
2465 rules_str(rules, rule->rule.filename_off),
2466 rule->rule.filename_line);
2467 entry = udev_list_entry_add(&event->run_list, rules_str(rules, cur->key.value_off), NULL);
2468 udev_list_entry_set_num(entry, cur->key.builtin_cmd);
2472 if (cur->key.rule_goto == 0)
2474 cur = &rules->tokens[cur->key.rule_goto];
2479 case TK_M_PARENTS_MIN:
2480 case TK_M_PARENTS_MAX:
2483 log_error("wrong type %u\n", cur->type);
2490 /* fast-forward to next rule */
2491 cur = rule + rule->rule.token_count;
2495 void udev_rules_apply_static_dev_perms(struct udev_rules *rules)
2503 if (rules->tokens == NULL)
2506 cur = &rules->tokens[0];
2509 switch (cur->type) {
2514 /* skip rules without a static_node tag */
2515 if (!rule->rule.has_static_node)
2529 mode = cur->key.mode;
2531 case TK_A_STATIC_NODE: {
2532 char filename[UTIL_PATH_SIZE];
2535 /* we assure, that the permissions tokens are sorted before the static token */
2536 if (mode == 0 && uid == 0 && gid == 0)
2538 util_strscpyl(filename, sizeof(filename), "/dev/", rules_str(rules, cur->key.value_off), NULL);
2539 if (stat(filename, &stats) != 0)
2541 if (!S_ISBLK(stats.st_mode) && !S_ISCHR(stats.st_mode))
2549 if (mode != (stats.st_mode & 01777)) {
2550 chmod(filename, mode);
2551 log_debug("chmod '%s' %#o\n", filename, mode);
2554 if ((uid != 0 && uid != stats.st_uid) || (gid != 0 && gid != stats.st_gid)) {
2555 chown(filename, uid, gid);
2556 log_debug("chown '%s' %u %u\n", filename, uid, gid);
2559 utimensat(AT_FDCWD, filename, NULL, 0);
2569 /* fast-forward to next rule */
2570 cur = rule + rule->rule.token_count;