2 * Copyright (C) 2008 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/>.
31 #define PREALLOC_TOKEN 2048
32 #define PREALLOC_STRBUF 32 * 1024
35 unsigned int name_off;
42 /* KEY=="", KEY!="", KEY+="", KEY="", KEY:="" */
47 /* every key in the rules file becomes a token */
49 unsigned int token_cur;
50 unsigned int token_max;
52 /* all key strings are copied to a single string buffer */
56 unsigned int buf_count;
58 /* during rule parsing, we cache uid/gid lookup results */
60 unsigned int uids_cur;
61 unsigned int uids_max;
63 unsigned int gids_cur;
64 unsigned int gids_max;
79 enum string_glob_type {
81 GL_PLAIN, /* no special chars */
82 GL_GLOB, /* shell globs ?,*,[] */
83 GL_SPLIT, /* multi-value A|B */
84 GL_SPLIT_GLOB, /* multi-value with glob A*|B* */
85 GL_SOMETHING, /* commonly used "?*" */
89 /* tokens of a rule are sorted/handled in this order */
94 TK_M_ACTION, /* val */
95 TK_M_DEVPATH, /* val */
96 TK_M_KERNEL, /* val */
97 TK_M_DEVLINK, /* val */
99 TK_M_ENV, /* val, attr */
100 TK_M_SUBSYSTEM, /* val */
101 TK_M_DRIVER, /* val */
102 TK_M_WAITFOR, /* val */
103 TK_M_ATTR, /* val, attr */
106 TK_M_KERNELS, /* val */
107 TK_M_SUBSYSTEMS, /* val */
108 TK_M_DRIVERS, /* val */
109 TK_M_ATTRS, /* val, attr */
112 TK_M_TEST, /* val, mode_t */
113 TK_M_PROGRAM, /* val */
114 TK_M_IMPORT_FILE, /* val */
115 TK_M_IMPORT_PROG, /* val */
116 TK_M_IMPORT_PARENT, /* val */
117 TK_M_RESULT, /* val */
121 TK_A_STRING_ESCAPE_NONE,
122 TK_A_STRING_ESCAPE_REPLACE,
123 TK_A_NUM_FAKE_PART, /* int */
124 TK_A_DEVLINK_PRIO, /* int */
125 TK_A_OWNER, /* val */
126 TK_A_GROUP, /* val */
128 TK_A_OWNER_ID, /* uid_t */
129 TK_A_GROUP_ID, /* gid_t */
130 TK_A_MODE_ID, /* mode_t */
131 TK_A_ENV, /* val, attr */
133 TK_A_DEVLINK, /* val */
134 TK_A_EVENT_TIMEOUT, /* int */
136 TK_A_ATTR, /* val, attr */
137 TK_A_RUN, /* val, bool */
138 TK_A_GOTO, /* size_t */
144 /* we try to pack stuff in a way that we take only 12 bytes per token */
147 unsigned char type; /* same as in rule and key */
151 unsigned short token_count;
152 unsigned int label_off;
153 unsigned short filename_off;
154 unsigned short filename_line;
161 unsigned int value_off;
163 unsigned int attr_off;
166 unsigned int rule_goto;
180 struct udev_rules *rules;
182 struct token token[MAX_TK];
183 unsigned int token_cur;
187 static const char *operation_str[] = {
188 [OP_UNSET] = "UNSET",
189 [OP_MATCH] = "match",
190 [OP_NOMATCH] = "nomatch",
191 [OP_MATCH_MAX] = "MATCH_MAX",
194 [OP_ASSIGN] = "assign",
195 [OP_ASSIGN_FINAL] = "assign-final",
198 static const char *string_glob_str[] = {
199 [GL_UNSET] = "UNSET",
200 [GL_PLAIN] = "plain",
202 [GL_SPLIT] = "split",
203 [GL_SPLIT_GLOB] = "split-glob",
204 [GL_SOMETHING] = "split-glob",
205 [GL_FORMAT] = "format",
208 static const char *token_str[] = {
209 [TK_UNSET] = "UNSET",
212 [TK_M_ACTION] = "M ACTION",
213 [TK_M_DEVPATH] = "M DEVPATH",
214 [TK_M_KERNEL] = "M KERNEL",
215 [TK_M_DEVLINK] = "M DEVLINK",
216 [TK_M_NAME] = "M NAME",
217 [TK_M_ENV] = "M ENV",
218 [TK_M_SUBSYSTEM] = "M SUBSYSTEM",
219 [TK_M_DRIVER] = "M DRIVER",
220 [TK_M_WAITFOR] = "M WAITFOR",
221 [TK_M_ATTR] = "M ATTR",
223 [TK_M_PARENTS_MIN] = "M PARENTS_MIN",
224 [TK_M_KERNELS] = "M KERNELS",
225 [TK_M_SUBSYSTEMS] = "M SUBSYSTEMS",
226 [TK_M_DRIVERS] = "M DRIVERS",
227 [TK_M_ATTRS] = "M ATTRS",
228 [TK_M_PARENTS_MAX] = "M PARENTS_MAX",
230 [TK_M_TEST] = "M TEST",
231 [TK_M_PROGRAM] = "M PROGRAM",
232 [TK_M_IMPORT_FILE] = "M IMPORT_FILE",
233 [TK_M_IMPORT_PROG] = "M IMPORT_PROG",
234 [TK_M_IMPORT_PARENT] = "M MPORT_PARENT",
235 [TK_M_RESULT] = "M RESULT",
236 [TK_M_MAX] = "M MAX",
238 [TK_A_IGNORE_DEVICE] = "A IGNORE_DEVICE",
239 [TK_A_STRING_ESCAPE_NONE] = "A STRING_ESCAPE_NONE",
240 [TK_A_STRING_ESCAPE_REPLACE] = "A STRING_ESCAPE_REPLACE",
241 [TK_A_NUM_FAKE_PART] = "A NUM_FAKE_PART",
242 [TK_A_DEVLINK_PRIO] = "A DEVLINK_PRIO",
243 [TK_A_OWNER] = "A OWNER",
244 [TK_A_GROUP] = "A GROUP",
245 [TK_A_MODE] = "A MODE",
246 [TK_A_OWNER_ID] = "A OWNER_ID",
247 [TK_A_GROUP_ID] = "A GROUP_ID",
248 [TK_A_MODE_ID] = "A MODE_ID",
249 [TK_A_ENV] = "A ENV",
250 [TK_A_NAME] = "A NAME",
251 [TK_A_DEVLINK] = "A DEVLINK",
252 [TK_A_EVENT_TIMEOUT] = "A EVENT_TIMEOUT",
253 [TK_A_IGNORE_REMOVE] = "A IGNORE_REMOVE",
254 [TK_A_ATTR] = "A ATTR",
255 [TK_A_RUN] = "A RUN",
256 [TK_A_GOTO] = "A GOTO",
257 [TK_A_LAST_RULE] = "A LAST_RULE",
262 static void dump_token(struct udev_rules *rules, struct token *token)
264 enum token_type type = token->type;
265 enum operation_type op = token->key.op;
266 enum string_glob_type glob = token->key.glob;
267 const char *value = &rules->buf[token->key.value_off];
268 const char *attr = &rules->buf[token->key.attr_off];
273 const char *tks_ptr = (char *)rules->tokens;
274 const char *tk_ptr = (char *)token;
275 unsigned int off = tk_ptr - tks_ptr;
277 dbg(rules->udev, "* RULE %s:%u, off: %u(%u), token_count: %u(%u), label: '%s', flags: 0x%02x\n",
278 &rules->buf[token->rule.filename_off], token->rule.filename_line,
279 off / (unsigned int) sizeof(struct token), off,
280 token->rule.token_count,
281 token->rule.token_count * (unsigned int) sizeof(struct token),
282 &rules->buf[token->rule.label_off],
295 case TK_M_SUBSYSTEMS:
298 case TK_M_IMPORT_FILE:
299 case TK_M_IMPORT_PROG:
300 case TK_M_IMPORT_PARENT:
308 dbg(rules->udev, "%s %s '%s'(%s)\n",
309 token_str[type], operation_str[op], value, string_glob_str[glob]);
316 dbg(rules->udev, "%s %s '%s' '%s'(%s)\n",
317 token_str[type], operation_str[op], attr, value, string_glob_str[glob]);
319 case TK_A_IGNORE_DEVICE:
320 case TK_A_STRING_ESCAPE_NONE:
321 case TK_A_STRING_ESCAPE_REPLACE:
323 case TK_A_IGNORE_REMOVE:
324 dbg(rules->udev, "%s\n", token_str[type]);
327 dbg(rules->udev, "%s %s '%s'(%s) %#o\n",
328 token_str[type], operation_str[op], value, string_glob_str[glob], token->key.mode);
330 case TK_A_NUM_FAKE_PART:
331 dbg(rules->udev, "%s %u\n", token_str[type], token->key.num_fake_part);
333 case TK_A_DEVLINK_PRIO:
334 dbg(rules->udev, "%s %s %u\n", token_str[type], operation_str[op], token->key.devlink_prio);
337 dbg(rules->udev, "%s %s %u\n", token_str[type], operation_str[op], token->key.uid);
340 dbg(rules->udev, "%s %s %u\n", token_str[type], operation_str[op], token->key.gid);
343 dbg(rules->udev, "%s %s %#o\n", token_str[type], operation_str[op], token->key.mode);
345 case TK_A_EVENT_TIMEOUT:
346 dbg(rules->udev, "%s %s %u\n", token_str[type], operation_str[op], token->key.event_timeout);
349 dbg(rules->udev, "%s '%s' %u\n", token_str[type], value, token->key.rule_goto);
352 dbg(rules->udev, "* %s\n", token_str[type]);
354 case TK_M_PARENTS_MIN:
355 case TK_M_PARENTS_MAX:
358 dbg(rules->udev, "unknown type %u\n", type);
363 static void dump_rules(struct udev_rules *rules)
367 dbg(rules->udev, "dumping %u (%zu bytes) tokens, %u (%zu bytes) strings\n",
369 rules->token_cur * sizeof(struct token),
372 for(i = 0; i < rules->token_cur; i++)
373 dump_token(rules, &rules->tokens[i]);
376 static const char **operation_str;
377 static const char **token_str;
378 static inline void dump_token(struct udev_rules *rules, struct token *token) {}
379 static inline void dump_rules(struct udev_rules *rules) {}
382 /* we could lookup and return existing strings, or tails of strings */
383 static int add_string(struct udev_rules *rules, const char *str)
385 size_t len = strlen(str)+1;
388 /* offset 0 is always '\0' */
392 /* grow buffer if needed */
393 if (rules->buf_cur + len+1 >= rules->buf_max) {
397 /* double the buffer size */
398 add = rules->buf_max;
402 buf = realloc(rules->buf, rules->buf_max + add);
405 dbg(rules->udev, "extend buffer from %zu to %zu\n", rules->buf_max, rules->buf_max + add);
407 rules->buf_max += add;
409 off = rules->buf_cur;
410 memcpy(&rules->buf[rules->buf_cur], str, len);
411 rules->buf_cur += len;
416 static int add_token(struct udev_rules *rules, struct token *token)
419 /* grow buffer if needed */
420 if (rules->token_cur+1 >= rules->token_max) {
421 struct token *tokens;
424 /* double the buffer size */
425 add = rules->token_max;
429 tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
432 dbg(rules->udev, "extend tokens from %u to %u\n", rules->token_max, rules->token_max + add);
433 rules->tokens = tokens;
434 rules->token_max += add;
436 memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
441 static uid_t add_uid(struct udev_rules *rules, const char *owner)
447 /* lookup, if we know it already */
448 for (i = 0; i < rules->uids_cur; i++) {
449 off = rules->uids[i].name_off;
450 if (strcmp(&rules->buf[off], owner) == 0) {
451 uid = rules->uids[i].uid;
452 dbg(rules->udev, "return existing %u for '%s'\n", uid, owner);
456 uid = util_lookup_user(rules->udev, owner);
458 /* grow buffer if needed */
459 if (rules->uids_cur+1 >= rules->uids_max) {
460 struct uid_gid *uids;
463 /* double the buffer size */
464 add = rules->uids_max;
468 uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
471 dbg(rules->udev, "extend uids from %u to %u\n", rules->uids_max, rules->uids_max + add);
473 rules->uids_max += add;
475 rules->uids[rules->uids_cur].uid = uid;
476 off = add_string(rules, owner);
479 rules->uids[rules->uids_cur].name_off = off;
484 static gid_t add_gid(struct udev_rules *rules, const char *group)
490 /* lookup, if we know it already */
491 for (i = 0; i < rules->gids_cur; i++) {
492 off = rules->gids[i].name_off;
493 if (strcmp(&rules->buf[off], group) == 0) {
494 gid = rules->gids[i].gid;
495 dbg(rules->udev, "return existing %u for '%s'\n", gid, group);
499 gid = util_lookup_group(rules->udev, group);
501 /* grow buffer if needed */
502 if (rules->gids_cur+1 >= rules->gids_max) {
503 struct uid_gid *gids;
506 /* double the buffer size */
507 add = rules->gids_max;
511 gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid));
514 dbg(rules->udev, "extend gids from %u to %u\n", rules->gids_max, rules->gids_max + add);
516 rules->gids_max += add;
518 rules->gids[rules->gids_cur].gid = gid;
519 off = add_string(rules, group);
522 rules->gids[rules->gids_cur].name_off = off;
527 static int import_property_from_string(struct udev_device *dev, char *line)
529 struct udev *udev = udev_device_get_udev(dev);
536 while (isspace(key[0]))
539 /* comment or empty line */
540 if (key[0] == '#' || key[0] == '\0')
543 /* split key/value */
544 val = strchr(key, '=');
551 while (isspace(val[0]))
558 while (isspace(key[len-1]))
562 /* terminate value */
566 while (isspace(val[len-1]))
574 if (val[0] == '"' || val[0] == '\'') {
575 if (val[len-1] != val[0]) {
576 info(udev, "inconsistent quoting: '%s', skip\n", line);
583 dbg(udev, "adding '%s'='%s'\n", key, val);
585 /* handle device, renamed by external tool, returning new path */
586 if (strcmp(key, "DEVPATH") == 0) {
587 char syspath[UTIL_PATH_SIZE];
589 info(udev, "updating devpath from '%s' to '%s'\n",
590 udev_device_get_devpath(dev), val);
591 util_strlcpy(syspath, udev_get_sys_path(udev), sizeof(syspath));
592 util_strlcat(syspath, val, sizeof(syspath));
593 udev_device_set_syspath(dev, syspath);
595 struct udev_list_entry *entry;
597 entry = udev_device_add_property(dev, key, val);
599 udev_list_entry_set_flag(entry, 1);
604 static int import_file_into_properties(struct udev_device *dev, const char *filename)
607 char line[UTIL_LINE_SIZE];
609 f = fopen(filename, "r");
612 while (fgets(line, sizeof(line), f) != NULL)
613 import_property_from_string(dev, line);
618 static int import_program_into_properties(struct udev_device *dev, const char *program)
620 struct udev *udev = udev_device_get_udev(dev);
626 envp = udev_device_get_properties_envp(dev);
627 if (util_run_program(udev, program, envp, result, sizeof(result), &reslen) != 0)
631 while (line != NULL) {
634 pos = strchr(line, '\n');
639 import_property_from_string(dev, line);
645 static int import_parent_into_properties(struct udev_device *dev, const char *filter)
647 struct udev *udev = udev_device_get_udev(dev);
648 struct udev_device *dev_parent;
649 struct udev_list_entry *list_entry;
651 dev_parent = udev_device_get_parent(dev);
652 if (dev_parent == NULL)
655 dbg(udev, "found parent '%s', get the node name\n", udev_device_get_syspath(dev_parent));
656 udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
657 const char *key = udev_list_entry_get_name(list_entry);
658 const char *val = udev_list_entry_get_value(list_entry);
660 if (fnmatch(filter, key, 0) == 0) {
661 struct udev_list_entry *entry;
663 dbg(udev, "import key '%s=%s'\n", key, val);
664 entry = udev_device_add_property(dev, key, val);
666 udev_list_entry_set_flag(entry, 1);
672 #define WAIT_LOOP_PER_SECOND 50
673 static int wait_for_file(struct udev_device *dev, const char *file, int timeout)
675 struct udev *udev = udev_device_get_udev(dev);
676 char filepath[UTIL_PATH_SIZE];
677 char devicepath[UTIL_PATH_SIZE];
679 int loop = timeout * WAIT_LOOP_PER_SECOND;
681 /* a relative path is a device attribute */
682 devicepath[0] = '\0';
683 if (file[0] != '/') {
684 util_strlcpy(devicepath, udev_get_sys_path(udev), sizeof(devicepath));
685 util_strlcat(devicepath, udev_device_get_devpath(dev), sizeof(devicepath));
687 util_strlcpy(filepath, devicepath, sizeof(filepath));
688 util_strlcat(filepath, "/", sizeof(filepath));
689 util_strlcat(filepath, file, sizeof(filepath));
693 dbg(udev, "will wait %i sec for '%s'\n", timeout, file);
696 if (stat(file, &stats) == 0) {
697 info(udev, "file '%s' appeared after %i loops\n", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
700 /* make sure, the device did not disappear in the meantime */
701 if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
702 info(udev, "device disappeared while waiting for '%s'\n", file);
705 info(udev, "wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND);
706 usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND);
708 info(udev, "waiting for '%s' failed\n", file);
712 static int attr_subst_subdir(char *attr, size_t len)
717 pos = strstr(attr, "/*/");
719 char str[UTIL_PATH_SIZE];
723 util_strlcpy(str, &pos[2], sizeof(str));
728 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
731 if (dent->d_name[0] == '.')
733 util_strlcat(attr, dent->d_name, len);
734 util_strlcat(attr, str, len);
735 if (stat(attr, &stats) == 0) {
744 util_strlcat(attr, str, len);
750 static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value)
756 if (linepos == NULL && linepos[0] == '\0')
759 /* skip whitespace */
760 while (isspace(linepos[0]) || linepos[0] == ',')
764 if (linepos[0] == '\0')
770 if (linepos[0] == '\0')
772 if (isspace(linepos[0]))
774 if (linepos[0] == '=')
776 if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
777 if (linepos[1] == '=')
781 /* remember end of key */
784 /* skip whitespace after key */
785 while (isspace(linepos[0]))
787 if (linepos[0] == '\0')
790 /* get operation type */
791 if (linepos[0] == '=' && linepos[1] == '=') {
794 } else if (linepos[0] == '!' && linepos[1] == '=') {
797 } else if (linepos[0] == '+' && linepos[1] == '=') {
800 } else if (linepos[0] == '=') {
803 } else if (linepos[0] == ':' && linepos[1] == '=') {
804 *op = OP_ASSIGN_FINAL;
812 /* skip whitespace after operator */
813 while (isspace(linepos[0]))
815 if (linepos[0] == '\0')
819 if (linepos[0] == '"')
826 temp = strchr(linepos, '"');
831 dbg(udev, "%s '%s'-'%s'\n", operation_str[*op], *key, *value);
833 /* move line to next key */
838 /* extract possible KEY{attr} */
839 static char *get_key_attribute(struct udev *udev, char *str)
844 attr = strchr(str, '{');
847 pos = strchr(attr, '}');
849 err(udev, "missing closing brace for format\n");
853 dbg(udev, "attribute='%s'\n", attr);
859 static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
860 enum operation_type op,
861 const char *value, const void *data)
863 struct token *token = &rule_tmp->token[rule_tmp->token_cur];
864 const char *attr = data;
865 enum string_glob_type glob;
867 memset(token, 0x00, sizeof(struct token));
879 case TK_M_SUBSYSTEMS:
882 case TK_M_IMPORT_FILE:
883 case TK_M_IMPORT_PROG:
884 case TK_M_IMPORT_PARENT:
892 token->key.value_off = add_string(rule_tmp->rules, value);
899 token->key.value_off = add_string(rule_tmp->rules, value);
900 token->key.attr_off = add_string(rule_tmp->rules, attr);
903 token->key.value_off = add_string(rule_tmp->rules, value);
905 token->key.mode = *(mode_t *)data;
907 case TK_A_IGNORE_DEVICE:
908 case TK_A_STRING_ESCAPE_NONE:
909 case TK_A_STRING_ESCAPE_REPLACE:
910 case TK_A_IGNORE_REMOVE:
914 token->key.value_off = add_string(rule_tmp->rules, value);
915 token->key.ignore_error = *(int *)data;
917 case TK_A_NUM_FAKE_PART:
918 token->key.num_fake_part = *(int *)data;
920 case TK_A_DEVLINK_PRIO:
921 token->key.devlink_prio = *(int *)data;
924 token->key.uid = *(uid_t *)data;
927 token->key.gid = *(gid_t *)data;
930 token->key.mode = *(mode_t *)data;
932 case TK_A_EVENT_TIMEOUT:
933 token->key.event_timeout = *(int *)data;
936 case TK_M_PARENTS_MIN:
937 case TK_M_PARENTS_MAX:
941 err(rule_tmp->rules->udev, "wrong type %u\n", type);
947 if (type < TK_M_MAX) {
948 /* check if we need to split or call fnmatch() while matching rules */
952 has_split = (strchr(value, '|') != NULL);
953 has_glob = (strchr(value, '*') != NULL || strchr(value, '?') != NULL ||
954 strchr(value, '[') != NULL || strchr(value, ']') != NULL);
955 if (has_split && has_glob) {
956 glob = GL_SPLIT_GLOB;
957 } else if (has_split) {
959 } else if (has_glob) {
960 if (strcmp(value, "?*") == 0)
966 /* check if we need to substitute format strings for matching rules */
967 if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
972 token->key.type = type;
974 token->key.glob = glob;
975 rule_tmp->token_cur++;
976 if (rule_tmp->token_cur >= ARRAY_SIZE(rule_tmp->token)) {
977 err(rule_tmp->rules->udev, "temporary rule array too small\n");
983 static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp)
986 unsigned int start = 0;
987 unsigned int end = rule_tmp->token_cur;
989 for (i = 0; i < rule_tmp->token_cur; i++) {
990 enum token_type next_val = TK_UNSET;
991 unsigned int next_idx;
994 /* find smallest value */
995 for (j = start; j < end; j++) {
996 if (rule_tmp->token[j].type == TK_UNSET)
998 if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
999 next_val = rule_tmp->token[j].type;
1004 /* add token and mark done */
1005 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
1007 rule_tmp->token[next_idx].type = TK_UNSET;
1010 if (next_idx == start)
1012 if (next_idx+1 == end)
1018 static int add_rule(struct udev_rules *rules, char *line,
1019 const char *filename, unsigned int filename_off, unsigned int lineno)
1025 struct rule_tmp rule_tmp;
1027 memset(&rule_tmp, 0x00, sizeof(struct rule_tmp));
1028 rule_tmp.rules = rules;
1029 rule_tmp.rule.type = TK_RULE;
1030 rule_tmp.rule.rule.filename_off = filename_off;
1031 rule_tmp.rule.rule.filename_line = lineno;
1037 enum operation_type op;
1039 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0)
1042 if (strcasecmp(key, "ACTION") == 0) {
1043 if (op > OP_MATCH_MAX) {
1044 err(rules->udev, "invalid ACTION operation\n");
1047 rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL);
1052 if (strcasecmp(key, "DEVPATH") == 0) {
1053 if (op > OP_MATCH_MAX) {
1054 err(rules->udev, "invalid DEVPATH operation\n");
1057 rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
1062 if (strcasecmp(key, "KERNEL") == 0) {
1063 if (op > OP_MATCH_MAX) {
1064 err(rules->udev, "invalid KERNEL operation\n");
1067 rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL);
1072 if (strcasecmp(key, "SUBSYSTEM") == 0) {
1073 if (op > OP_MATCH_MAX) {
1074 err(rules->udev, "invalid SUBSYSTEM operation\n");
1077 /* bus, class, subsystem events should all be the same */
1078 if (strcmp(value, "subsystem") == 0 ||
1079 strcmp(value, "bus") == 0 ||
1080 strcmp(value, "class") == 0) {
1081 if (strcmp(value, "bus") == 0 || strcmp(value, "class") == 0)
1082 err(rules->udev, "'%s' must be specified as 'subsystem' \n"
1083 "please fix it in %s:%u", value, filename, lineno);
1084 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
1086 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
1091 if (strcasecmp(key, "DRIVER") == 0) {
1092 if (op > OP_MATCH_MAX) {
1093 err(rules->udev, "invalid DRIVER operation\n");
1096 rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL);
1101 if (strncasecmp(key, "ATTR{", sizeof("ATTR{")-1) == 0) {
1102 attr = get_key_attribute(rules->udev, key + sizeof("ATTR")-1);
1104 err(rules->udev, "error parsing ATTR attribute\n");
1107 if (op < OP_MATCH_MAX) {
1108 rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
1110 rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr);
1116 if (strcasecmp(key, "KERNELS") == 0 ||
1117 strcasecmp(key, "ID") == 0) {
1118 if (op > OP_MATCH_MAX) {
1119 err(rules->udev, "invalid KERNELS operation\n");
1122 rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1127 if (strcasecmp(key, "SUBSYSTEMS") == 0 ||
1128 strcasecmp(key, "BUS") == 0) {
1129 if (op > OP_MATCH_MAX) {
1130 err(rules->udev, "invalid SUBSYSTEMS operation\n");
1133 rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1138 if (strcasecmp(key, "DRIVERS") == 0) {
1139 if (op > OP_MATCH_MAX) {
1140 err(rules->udev, "invalid DRIVERS operation\n");
1143 rule_add_key(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
1148 if (strncasecmp(key, "ATTRS{", sizeof("ATTRS{")-1) == 0 ||
1149 strncasecmp(key, "SYSFS{", sizeof("SYSFS{")-1) == 0) {
1150 if (op > OP_MATCH_MAX) {
1151 err(rules->udev, "invalid ATTRS operation\n");
1154 attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
1156 err(rules->udev, "error parsing ATTRS attribute\n");
1159 if (strncmp(attr, "device/", 7) == 0)
1160 err(rules->udev, "the 'device' link may not be available in a future kernel, "
1161 "please fix it in %s:%u", filename, lineno);
1162 else if (strstr(attr, "../") != NULL)
1163 err(rules->udev, "do not reference parent sysfs directories directly, "
1164 "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
1165 rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1170 if (strncasecmp(key, "ENV{", sizeof("ENV{")-1) == 0) {
1171 attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1);
1173 err(rules->udev, "error parsing ENV attribute\n");
1176 if (strncmp(attr, "PHYSDEV", 7) == 0)
1178 if (op < OP_MATCH_MAX) {
1179 if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
1182 if (rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
1189 if (strcasecmp(key, "PROGRAM") == 0) {
1190 rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
1195 if (strcasecmp(key, "RESULT") == 0) {
1196 if (op > OP_MATCH_MAX) {
1197 err(rules->udev, "invalid RESULT operation\n");
1200 rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL);
1205 if (strncasecmp(key, "IMPORT", sizeof("IMPORT")-1) == 0) {
1206 attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1);
1207 if (attr != NULL && strstr(attr, "program")) {
1208 dbg(rules->udev, "IMPORT will be executed\n");
1209 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1211 } else if (attr != NULL && strstr(attr, "file")) {
1212 dbg(rules->udev, "IMPORT will be included as file\n");
1213 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1215 } else if (attr != NULL && strstr(attr, "parent")) {
1216 dbg(rules->udev, "IMPORT will include the parent values\n");
1217 rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
1220 /* figure it out if it is executable */
1221 char file[UTIL_PATH_SIZE];
1223 struct stat statbuf;
1225 util_strlcpy(file, value, sizeof(file));
1226 pos = strchr(file, ' ');
1230 /* allow programs in /lib/udev called without the path */
1231 if (strchr(file, '/') == NULL) {
1232 util_strlcpy(file, UDEV_PREFIX "/lib/udev/", sizeof(file));
1233 util_strlcat(file, value, sizeof(file));
1234 pos = strchr(file, ' ');
1239 dbg(rules->udev, "IMPORT auto mode for '%s'\n", file);
1240 if (!lstat(file, &statbuf) && (statbuf.st_mode & S_IXUSR)) {
1241 dbg(rules->udev, "IMPORT will be executed (autotype)\n");
1242 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1245 dbg(rules->udev, "IMPORT will be included as file (autotype)\n");
1246 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1253 if (strncasecmp(key, "TEST", sizeof("TEST")-1) == 0) {
1256 if (op > OP_MATCH_MAX) {
1257 err(rules->udev, "invalid TEST operation\n");
1260 attr = get_key_attribute(rules->udev, key + sizeof("TEST")-1);
1262 mode = strtol(attr, NULL, 8);
1263 rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode);
1265 rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL);
1271 if (strncasecmp(key, "RUN", sizeof("RUN")-1) == 0) {
1274 attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1);
1275 if (attr != NULL && strstr(attr, "ignore_error"))
1277 rule_add_key(&rule_tmp, TK_A_RUN, op, value, &flag);
1282 if (strcasecmp(key, "WAIT_FOR") == 0 || strcasecmp(key, "WAIT_FOR_SYSFS") == 0) {
1283 rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1288 if (strcasecmp(key, "LABEL") == 0) {
1289 rule_tmp.rule.rule.label_off = add_string(rules, value);
1294 if (strcasecmp(key, "GOTO") == 0) {
1295 rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1300 if (strncasecmp(key, "NAME", sizeof("NAME")-1) == 0) {
1301 if (op < OP_MATCH_MAX) {
1302 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
1304 if (value[0] == '\0')
1305 dbg(rules->udev, "name empty, node creation suppressed\n");
1306 rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL);
1307 attr = get_key_attribute(rules->udev, key + sizeof("NAME")-1);
1309 if (strstr(attr, "all_partitions") != NULL) {
1310 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1312 dbg(rules->udev, "creation of partition nodes requested\n");
1313 rule_add_key(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1315 if (strstr(attr, "ignore_remove") != NULL) {
1316 dbg(rules->udev, "remove event should be ignored\n");
1317 rule_add_key(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1321 rule_tmp.rule.rule.flags = 1;
1325 if (strcasecmp(key, "SYMLINK") == 0) {
1326 if (op < OP_MATCH_MAX)
1327 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
1329 rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, NULL);
1330 rule_tmp.rule.rule.flags = 1;
1335 if (strcasecmp(key, "OWNER") == 0) {
1339 uid = strtoul(value, &endptr, 10);
1340 if (endptr[0] == '\0') {
1341 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1342 } else if (rules->resolve_names && strchr("$%", value[0]) == NULL) {
1343 uid = add_uid(rules, value);
1344 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1346 rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
1348 rule_tmp.rule.rule.flags = 1;
1353 if (strcasecmp(key, "GROUP") == 0) {
1357 gid = strtoul(value, &endptr, 10);
1358 if (endptr[0] == '\0') {
1359 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1360 } else if (rules->resolve_names && strchr("$%", value[0]) == NULL) {
1361 gid = add_gid(rules, value);
1362 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1364 rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
1366 rule_tmp.rule.rule.flags = 1;
1371 if (strcasecmp(key, "MODE") == 0) {
1375 mode = strtol(value, &endptr, 8);
1376 if (endptr[0] == '\0')
1377 rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1379 rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
1380 rule_tmp.rule.rule.flags = 1;
1385 if (strcasecmp(key, "OPTIONS") == 0) {
1388 if (strstr(value, "last_rule") != NULL) {
1389 dbg(rules->udev, "last rule to be applied\n");
1390 rule_add_key(&rule_tmp, TK_A_LAST_RULE, 0, NULL, NULL);
1392 if (strstr(value, "ignore_device") != NULL) {
1393 dbg(rules->udev, "device should be ignored\n");
1394 rule_add_key(&rule_tmp, TK_A_IGNORE_DEVICE, 0, NULL, NULL);
1396 if (strstr(value, "ignore_remove") != NULL) {
1397 dbg(rules->udev, "remove event should be ignored\n");
1398 rule_add_key(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1400 pos = strstr(value, "link_priority=");
1402 int prio = atoi(&pos[strlen("link_priority=")]);
1404 rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, 0, NULL, &prio);
1405 dbg(rules->udev, "link priority=%i\n", prio);
1407 pos = strstr(value, "event_timeout=");
1409 int tout = atoi(&pos[strlen("event_timeout=")]);
1411 rule_add_key(&rule_tmp, TK_A_EVENT_TIMEOUT, 0, NULL, &tout);
1412 dbg(rules->udev, "event timout=%i\n", tout);
1414 pos = strstr(value, "string_escape=");
1416 pos = &pos[strlen("string_escape=")];
1417 if (strncmp(pos, "none", strlen("none")) == 0)
1418 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, 0, NULL, NULL);
1419 else if (strncmp(pos, "replace", strlen("replace")) == 0)
1420 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, 0, NULL, NULL);
1422 if (strstr(value, "all_partitions") != NULL) {
1423 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1425 rule_add_key(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1426 dbg(rules->udev, "creation of partition nodes requested\n");
1431 err(rules->udev, "unknown key '%s' in %s:%u\n", key, filename, lineno);
1435 err(rules->udev, "PHYSDEV* values are deprecated and not available on recent kernels, \n"
1436 "please fix it in %s:%u", filename, lineno);
1438 /* skip line if not any valid key was found */
1442 /* add rule token */
1443 rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur;
1444 if (add_token(rules, &rule_tmp.rule) != 0)
1447 /* add tokens to list, sorted by type */
1448 if (sort_token(rules, &rule_tmp) != 0)
1453 err(rules->udev, "invalid rule '%s:%u'\n", filename, lineno);
1457 static int parse_file(struct udev_rules *rules, const char *filename, unsigned short filename_off)
1460 unsigned int first_token;
1461 char line[UTIL_LINE_SIZE];
1465 info(rules->udev, "reading '%s' as rules file\n", filename);
1467 f = fopen(filename, "r");
1471 first_token = rules->token_cur;
1473 while(fgets(line, sizeof(line), f) != NULL) {
1477 /* skip whitespace */
1480 while (isspace(key[0]))
1491 /* continue reading if backslash+newline is found */
1492 while (line[len-2] == '\\') {
1493 if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1499 if (len+1 >= sizeof(line)) {
1500 err(rules->udev, "line too long '%s':%u, ignored\n", filename, line_nr);
1503 add_rule(rules, key, filename, filename_off, line_nr);
1507 /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1508 for (i = first_token+1; i < rules->token_cur; i++) {
1509 if (rules->tokens[i].type == TK_A_GOTO) {
1510 char *label = &rules->buf[rules->tokens[i].key.value_off];
1513 for (j = i+1; j < rules->token_cur; j++) {
1514 if (rules->tokens[j].type != TK_RULE)
1516 if (rules->tokens[j].rule.label_off == 0)
1518 if (strcmp(label, &rules->buf[rules->tokens[j].rule.label_off]) != 0)
1520 rules->tokens[i].key.rule_goto = j;
1522 if (rules->tokens[i].key.rule_goto == 0)
1523 err(rules->udev, "GOTO '%s' has no matching label in: '%s'\n", label, filename);
1529 static int add_matching_files(struct udev *udev, struct udev_list_node *file_list, const char *dirname, const char *suffix)
1532 char filename[UTIL_PATH_SIZE];
1534 dbg(udev, "open directory '%s'\n", dirname);
1535 dir = opendir(dirname);
1537 err(udev, "unable to open '%s': %m\n", dirname);
1542 struct dirent *dent;
1544 dent = readdir(dir);
1545 if (dent == NULL || dent->d_name[0] == '\0')
1548 if (dent->d_name[0] == '.')
1551 /* look for file matching with specified suffix */
1552 if (suffix != NULL) {
1555 ext = strrchr(dent->d_name, '.');
1558 if (strcmp(ext, suffix) != 0)
1561 dbg(udev, "put file '%s/%s' into list\n", dirname, dent->d_name);
1563 snprintf(filename, sizeof(filename), "%s/%s", dirname, dent->d_name);
1564 filename[sizeof(filename)-1] = '\0';
1565 udev_list_entry_add(udev, file_list, filename, NULL, 1, 1);
1572 struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
1574 struct udev_rules *rules;
1575 struct stat statbuf;
1576 struct udev_list_node file_list;
1577 struct udev_list_entry *file_loop, *file_tmp;
1578 struct token end_token;
1580 rules = malloc(sizeof(struct udev_rules));
1583 memset(rules, 0x00, sizeof(struct udev_rules));
1585 rules->resolve_names = resolve_names;
1586 udev_list_init(&file_list);
1588 /* init token array and string buffer */
1589 rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
1590 if (rules->tokens == NULL)
1592 rules->token_max = PREALLOC_TOKEN;
1593 rules->buf = malloc(PREALLOC_STRBUF);
1594 if (rules->buf == NULL)
1596 rules->buf_max = PREALLOC_STRBUF;
1597 /* offset 0 is always '\0' */
1598 rules->buf[0] = '\0';
1600 dbg(udev, "prealloc %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1601 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1603 if (udev_get_rules_path(udev) != NULL) {
1604 /* custom rules location for testing */
1605 add_matching_files(udev, &file_list, udev_get_rules_path(udev), ".rules");
1607 char filename[PATH_MAX];
1608 struct udev_list_node sort_list;
1609 struct udev_list_entry *sort_loop, *sort_tmp;
1611 /* read user/custom rules */
1612 add_matching_files(udev, &file_list, SYSCONFDIR "/udev/rules.d", ".rules");
1614 /* read dynamic/temporary rules */
1615 util_strlcpy(filename, udev_get_dev_path(udev), sizeof(filename));
1616 util_strlcat(filename, "/.udev/rules.d", sizeof(filename));
1617 if (stat(filename, &statbuf) != 0) {
1618 util_create_path(udev, filename);
1619 udev_selinux_setfscreatecon(udev, filename, S_IFDIR|0755);
1620 mkdir(filename, 0755);
1621 udev_selinux_resetfscreatecon(udev);
1623 udev_list_init(&sort_list);
1624 add_matching_files(udev, &sort_list, filename, ".rules");
1626 /* read default rules */
1627 add_matching_files(udev, &sort_list, UDEV_PREFIX "/lib/udev/rules.d", ".rules");
1629 /* sort all rules files by basename into list of files */
1630 udev_list_entry_foreach_safe(sort_loop, sort_tmp, udev_list_get_entry(&sort_list)) {
1631 const char *sort_name = udev_list_entry_get_name(sort_loop);
1632 const char *sort_base = strrchr(sort_name, '/');
1634 if (sort_base == NULL)
1636 /* sort entry into existing list */
1637 udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1638 const char *file_name = udev_list_entry_get_name(file_loop);
1639 const char *file_base = strrchr(file_name, '/');
1641 if (file_base == NULL)
1643 if (strcmp(file_base, sort_base) == 0) {
1644 info(udev, "rule file basename '%s' already added, ignoring '%s'\n",
1645 file_name, sort_name);
1646 udev_list_entry_delete(sort_loop);
1650 if (strcmp(file_base, sort_base) > 0) {
1651 /* found later file, insert before */
1652 udev_list_entry_remove(sort_loop);
1653 udev_list_entry_insert_before(sort_loop, file_loop);
1658 /* current file already handled */
1659 if (sort_loop == NULL)
1661 /* no later file, append to end of list */
1662 udev_list_entry_remove(sort_loop);
1663 udev_list_entry_append(sort_loop, &file_list);
1667 /* add all filenames to the string buffer */
1668 udev_list_entry_foreach(file_loop, udev_list_get_entry(&file_list)) {
1669 const char *filename = udev_list_entry_get_name(file_loop);
1670 unsigned int filename_off;
1672 filename_off = add_string(rules, filename);
1673 /* the offset in the rule is limited to unsigned short */
1674 if (filename_off < USHRT_MAX)
1675 udev_list_entry_set_flag(file_loop, filename_off);
1678 /* parse list of files */
1679 udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1680 const char *filename = udev_list_entry_get_name(file_loop);
1681 unsigned int filename_off = udev_list_entry_get_flag(file_loop);
1683 if (stat(filename, &statbuf) == 0 && statbuf.st_size > 0)
1684 parse_file(rules, filename, filename_off);
1686 info(udev, "can not read '%s'\n", filename);
1687 udev_list_entry_delete(file_loop);
1690 memset(&end_token, 0x00, sizeof(struct token));
1691 end_token.type = TK_END;
1692 add_token(rules, &end_token);
1694 /* shrink allocated token and string buffer */
1695 if (rules->token_cur < rules->token_max) {
1696 struct token *tokens;
1698 tokens = realloc(rules->tokens, rules->token_cur * sizeof(struct token));
1699 if (tokens != NULL || rules->token_cur == 0) {
1700 rules->tokens = tokens;
1701 rules->token_max = rules->token_cur;
1704 if (rules->buf_cur < rules->buf_max) {
1707 buf = realloc(rules->buf, rules->buf_cur);
1708 if (buf != NULL || rules->buf_cur == 0) {
1710 rules->buf_max = rules->buf_cur;
1713 info(udev, "shrunk to %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1714 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1716 /* cleanup uid/gid cache */
1719 rules->uids_cur = 0;
1720 rules->uids_max = 0;
1723 rules->gids_cur = 0;
1724 rules->gids_max = 0;
1730 void udev_rules_unref(struct udev_rules *rules)
1734 free(rules->tokens);
1741 static int match_key(struct udev_rules *rules, struct token *token, const char *val)
1743 char *key_value = &rules->buf[token->key.value_off];
1750 switch (token->key.glob) {
1752 match = (strcmp(key_value, val) == 0);
1755 match = (fnmatch(key_value, val, 0) == 0);
1762 split = &rules->buf[token->key.value_off];
1767 next = strchr(split, '|');
1769 size_t matchlen = (size_t)(next - split);
1771 match = (matchlen == len && strncmp(split, val, matchlen) == 0);
1775 match = (strcmp(split, val) == 0);
1784 char value[UTIL_PATH_SIZE];
1786 util_strlcpy(value, &rules->buf[token->key.value_off], sizeof(value));
1788 while (key_value != NULL) {
1789 pos = strchr(key_value, '|');
1794 dbg(rules->udev, "match %s '%s' <-> '%s'\n", token_str[token->type], key_value, val);
1795 match = (fnmatch(key_value, val, 0) == 0);
1803 match = (val[0] != '\0');
1810 if (match && (token->key.op == OP_MATCH)) {
1811 dbg(rules->udev, "%s is true (matching value)\n", token_str[token->type]);
1814 if (!match && (token->key.op == OP_NOMATCH)) {
1815 dbg(rules->udev, "%s is true (non-matching value)\n", token_str[token->type]);
1818 dbg(rules->udev, "%s is not true\n", token_str[token->type]);
1822 static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur)
1824 const char *key_name = &rules->buf[cur->key.attr_off];
1825 const char *key_value = &rules->buf[cur->key.value_off];
1826 char value[UTIL_NAME_SIZE];
1830 if (key_name[0] == '[') {
1831 char attr[UTIL_PATH_SIZE];
1833 util_strlcpy(attr, key_name, sizeof(attr));
1834 util_resolve_subsys_kernel(event->udev, attr, value, sizeof(value), 1);
1836 if (value[0] == '\0') {
1839 val = udev_device_get_sysattr_value(dev, key_name);
1842 util_strlcpy(value, val, sizeof(value));
1845 /* strip trailing whitespace of value, if not asked to match for it */
1846 len = strlen(key_value);
1847 if (len > 0 && !isspace(key_value[len-1])) {
1848 len = strlen(value);
1849 while (len > 0 && isspace(value[--len]))
1851 dbg(rules->udev, "removed trailing whitespace from '%s'\n", value);
1853 return match_key(rules, cur, value);
1862 int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event)
1866 enum escape_type esc = ESCAPE_UNSET;
1869 if (rules->tokens == NULL)
1872 can_set_name = ((strcmp(udev_device_get_action(event->dev), "add") == 0 ||
1873 strcmp(udev_device_get_action(event->dev), "change") == 0) &&
1874 (major(udev_device_get_devnum(event->dev)) > 0 ||
1875 strcmp(udev_device_get_subsystem(event->dev), "net") == 0));
1877 /* loop through token list, match, run actions or forward to next rule */
1878 cur = &rules->tokens[0];
1881 dump_token(rules, cur);
1882 switch (cur->type) {
1886 /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
1887 if (!can_set_name && rule->rule.flags)
1892 if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
1896 if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
1900 if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
1905 size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
1906 struct udev_list_entry *list_entry;
1909 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
1910 const char *devlink;
1912 devlink = &udev_list_entry_get_name(list_entry)[devlen];
1913 if (match_key(rules, cur, devlink) == 0) {
1923 if (match_key(rules, cur, event->name) != 0)
1928 struct udev_list_entry *list_entry;
1929 const char *key_name = &rules->buf[cur->key.attr_off];
1932 list_entry = udev_device_get_properties_list_entry(event->dev);
1933 list_entry = udev_list_entry_get_by_name(list_entry, key_name);
1934 value = udev_list_entry_get_value(list_entry);
1935 if (value == NULL) {
1936 dbg(event->udev, "ENV{%s} is not set, treat as empty\n", key_name);
1939 if (match_key(rules, cur, value))
1943 case TK_M_SUBSYSTEM:
1944 if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
1948 if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
1953 char filename[UTIL_PATH_SIZE];
1956 util_strlcpy(filename, &rules->buf[cur->key.value_off], sizeof(filename));
1957 udev_event_apply_format(event, filename, sizeof(filename));
1958 found = (wait_for_file(event->dev, filename, 10) == 0);
1959 if (!found && (cur->key.op != OP_NOMATCH))
1964 if (match_attr(rules, event->dev, event, cur) != 0)
1968 case TK_M_SUBSYSTEMS:
1974 /* get whole sequence of parent matches */
1976 while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX)
1979 /* loop over parents */
1980 event->dev_parent = event->dev;
1984 dbg(event->udev, "parent: '%s'\n", udev_device_get_syspath(event->dev_parent));
1985 /* loop over sequence of parent match keys */
1986 for (key = cur; key < next; key++ ) {
1987 dump_token(rules, key);
1990 if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
1993 case TK_M_SUBSYSTEMS:
1994 if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
1998 if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
2002 if (match_attr(rules, event->dev_parent, event, key) != 0)
2008 dbg(event->udev, "parent key matched\n");
2010 dbg(event->udev, "all parent keys matched\n");
2011 /* all keys matched */
2015 event->dev_parent = udev_device_get_parent(event->dev_parent);
2016 if (event->dev_parent == NULL)
2019 /* move behind our sequence of parent match keys */
2025 char filename[UTIL_PATH_SIZE];
2026 struct stat statbuf;
2029 util_strlcpy(filename, &rules->buf[cur->key.value_off], sizeof(filename));
2030 udev_event_apply_format(event, filename, sizeof(filename));
2031 if (util_resolve_subsys_kernel(event->udev, NULL, filename, sizeof(filename), 0) != 0)
2032 if (filename[0] != '/') {
2033 char tmp[UTIL_PATH_SIZE];
2035 util_strlcpy(tmp, udev_device_get_syspath(event->dev), sizeof(tmp));
2036 util_strlcat(tmp, "/", sizeof(tmp));
2037 util_strlcat(tmp, filename, sizeof(tmp));
2038 util_strlcpy(filename, tmp, sizeof(filename));
2041 attr_subst_subdir(filename, sizeof(filename));
2043 match = (stat(filename, &statbuf) == 0);
2044 dbg(event->udev, "'%s' %s", filename, match ? "exists\n" : "does not exist\n");
2045 if (match && cur->key.mode > 0) {
2046 match = ((statbuf.st_mode & cur->key.mode) > 0);
2047 dbg(event->udev, "'%s' has mode=%#o and %s %#o\n", filename, statbuf.st_mode,
2048 match ? "matches" : "does not match", cur->key.mode);
2050 if (match && cur->key.op == OP_NOMATCH)
2052 if (!match && cur->key.op == OP_MATCH)
2058 char program[UTIL_PATH_SIZE];
2060 char result[UTIL_PATH_SIZE];
2062 free(event->program_result);
2063 event->program_result = NULL;
2064 util_strlcpy(program, &rules->buf[cur->key.value_off], sizeof(program));
2065 udev_event_apply_format(event, program, sizeof(program));
2066 envp = udev_device_get_properties_envp(event->dev);
2067 info(event->udev, "PROGRAM '%s' %s:%u\n",
2069 &rules->buf[rule->rule.filename_off],
2070 rule->rule.filename_line);
2071 if (util_run_program(event->udev, program, envp, result, sizeof(result), NULL) != 0) {
2072 if (cur->key.op != OP_NOMATCH)
2077 util_remove_trailing_chars(result, '\n');
2078 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2079 count = udev_util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
2081 info(event->udev, "%i character(s) replaced\n" , count);
2083 event->program_result = strdup(result);
2084 dbg(event->udev, "storing result '%s'\n", event->program_result);
2085 if (cur->key.op == OP_NOMATCH)
2090 case TK_M_IMPORT_FILE:
2092 char import[UTIL_PATH_SIZE];
2094 util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));
2095 udev_event_apply_format(event, import, sizeof(import));
2096 if (import_file_into_properties(event->dev, import) != 0)
2097 if (cur->key.op != OP_NOMATCH)
2101 case TK_M_IMPORT_PROG:
2103 char import[UTIL_PATH_SIZE];
2105 util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));
2106 udev_event_apply_format(event, import, sizeof(import));
2107 info(event->udev, "IMPORT '%s' %s:%u\n",
2109 &rules->buf[rule->rule.filename_off],
2110 rule->rule.filename_line);
2111 if (import_program_into_properties(event->dev, import) != 0)
2112 if (cur->key.op != OP_NOMATCH)
2116 case TK_M_IMPORT_PARENT:
2118 char import[UTIL_PATH_SIZE];
2120 util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));
2121 udev_event_apply_format(event, import, sizeof(import));
2122 if (import_parent_into_properties(event->dev, import) != 0)
2123 if (cur->key.op != OP_NOMATCH)
2128 if (match_key(rules, cur, event->program_result) != 0)
2132 case TK_A_IGNORE_DEVICE:
2133 event->ignore_device = 1;
2136 case TK_A_STRING_ESCAPE_NONE:
2139 case TK_A_STRING_ESCAPE_REPLACE:
2140 esc = ESCAPE_REPLACE;
2142 case TK_A_NUM_FAKE_PART:
2143 if (strcmp(udev_device_get_subsystem(event->dev), "block") != 0)
2145 if (udev_device_get_sysnum(event->dev) != NULL)
2147 udev_device_set_num_fake_partitions(event->dev, cur->key.num_fake_part);
2149 case TK_A_DEVLINK_PRIO:
2150 udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
2154 char owner[UTIL_NAME_SIZE];
2156 if (event->owner_final)
2158 if (cur->key.op == OP_ASSIGN_FINAL)
2159 event->owner_final = 1;
2160 util_strlcpy(owner, &rules->buf[cur->key.value_off], sizeof(owner));
2161 udev_event_apply_format(event, owner, sizeof(owner));
2162 event->uid = util_lookup_user(event->udev, owner);
2163 info(event->udev, "OWNER %u %s:%u\n",
2165 &rules->buf[rule->rule.filename_off],
2166 rule->rule.filename_line);
2171 char group[UTIL_NAME_SIZE];
2173 if (event->group_final)
2175 if (cur->key.op == OP_ASSIGN_FINAL)
2176 event->group_final = 1;
2177 util_strlcpy(group, &rules->buf[cur->key.value_off], sizeof(group));
2178 udev_event_apply_format(event, group, sizeof(group));
2179 event->gid = util_lookup_group(event->udev, group);
2180 info(event->udev, "GROUP %u %s:%u\n",
2182 &rules->buf[rule->rule.filename_off],
2183 rule->rule.filename_line);
2188 char mode[UTIL_NAME_SIZE];
2191 if (event->mode_final)
2193 if (cur->key.op == OP_ASSIGN_FINAL)
2194 event->mode_final = 1;
2195 util_strlcpy(mode, &rules->buf[cur->key.value_off], sizeof(mode));
2196 udev_event_apply_format(event, mode, sizeof(mode));
2197 event->mode = strtol(mode, &endptr, 8);
2198 if (endptr[0] != '\0') {
2199 err(event->udev, "invalide mode '%s' set default mode 0660\n", mode);
2202 info(event->udev, "MODE %#o %s:%u\n",
2204 &rules->buf[rule->rule.filename_off],
2205 rule->rule.filename_line);
2209 if (event->owner_final)
2211 if (cur->key.op == OP_ASSIGN_FINAL)
2212 event->owner_final = 1;
2213 event->uid = cur->key.uid;
2214 info(event->udev, "OWNER %u %s:%u\n",
2216 &rules->buf[rule->rule.filename_off],
2217 rule->rule.filename_line);
2220 if (event->group_final)
2222 if (cur->key.op == OP_ASSIGN_FINAL)
2223 event->group_final = 1;
2224 event->gid = cur->key.gid;
2225 info(event->udev, "GROUP %u %s:%u\n",
2227 &rules->buf[rule->rule.filename_off],
2228 rule->rule.filename_line);
2231 if (event->mode_final)
2233 if (cur->key.op == OP_ASSIGN_FINAL)
2234 event->mode_final = 1;
2235 event->mode = cur->key.mode;
2236 info(event->udev, "MODE %#o %s:%u\n",
2238 &rules->buf[rule->rule.filename_off],
2239 rule->rule.filename_line);
2243 const char *name = &rules->buf[cur->key.attr_off];
2244 char *value = &rules->buf[cur->key.value_off];
2246 if (value[0] != '\0') {
2247 char temp_value[UTIL_NAME_SIZE];
2248 struct udev_list_entry *entry;
2250 util_strlcpy(temp_value, value, sizeof(temp_value));
2251 udev_event_apply_format(event, temp_value, sizeof(temp_value));
2252 entry = udev_device_add_property(event->dev, name, temp_value);
2254 udev_list_entry_set_flag(entry, 1);
2256 udev_device_add_property(event->dev, name, NULL);
2262 const char *name = &rules->buf[cur->key.value_off];
2263 char name_str[UTIL_PATH_SIZE];
2266 if (event->name_final)
2268 if (cur->key.op == OP_ASSIGN_FINAL)
2269 event->name_final = 1;
2270 if (name[0] == '\0') {
2275 util_strlcpy(name_str, name, sizeof(name_str));
2276 udev_event_apply_format(event, name_str, sizeof(name_str));
2277 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2278 count = udev_util_replace_chars(name_str, "/");
2280 info(event->udev, "%i character(s) replaced\n", count);
2282 event->name = strdup(name_str);
2283 info(event->udev, "NAME '%s' %s:%u\n",
2285 &rules->buf[rule->rule.filename_off],
2286 rule->rule.filename_line);
2292 char temp[UTIL_PATH_SIZE];
2293 char filename[UTIL_PATH_SIZE];
2297 if (event->devlink_final)
2299 if (major(udev_device_get_devnum(event->dev)) == 0)
2301 if (cur->key.op == OP_ASSIGN_FINAL)
2302 event->devlink_final = 1;
2303 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2304 udev_device_cleanup_devlinks_list(event->dev);
2306 /* allow multiple symlinks separated by spaces */
2307 util_strlcpy(temp, &rules->buf[cur->key.value_off], sizeof(temp));
2308 udev_event_apply_format(event, temp, sizeof(temp));
2309 if (esc == ESCAPE_UNSET)
2310 count = udev_util_replace_chars(temp, "/ ");
2311 else if (esc == ESCAPE_REPLACE)
2312 count = udev_util_replace_chars(temp, "/");
2314 info(event->udev, "%i character(s) replaced\n" , count);
2315 dbg(event->udev, "rule applied, added symlink(s) '%s'\n", temp);
2317 while (isspace(pos[0]))
2319 next = strchr(pos, ' ');
2322 info(event->udev, "LINK '%s' %s:%u\n",
2324 &rules->buf[rule->rule.filename_off],
2325 rule->rule.filename_line);
2326 util_strlcpy(filename, udev_get_dev_path(event->udev), sizeof(filename));
2327 util_strlcat(filename, "/", sizeof(filename));
2328 util_strlcat(filename, pos, sizeof(filename));
2329 udev_device_add_devlink(event->dev, filename);
2330 while (isspace(next[1]))
2333 next = strchr(pos, ' ');
2335 if (pos[0] != '\0') {
2336 info(event->udev, "LINK '%s' %s:%u\n",
2338 &rules->buf[rule->rule.filename_off],
2339 rule->rule.filename_line);
2340 util_strlcpy(filename, udev_get_dev_path(event->udev), sizeof(filename));
2341 util_strlcat(filename, "/", sizeof(filename));
2342 util_strlcat(filename, pos, sizeof(filename));
2343 udev_device_add_devlink(event->dev, filename);
2347 case TK_A_EVENT_TIMEOUT:
2348 udev_device_set_event_timeout(event->dev, cur->key.event_timeout);
2350 case TK_A_IGNORE_REMOVE:
2351 udev_device_set_ignore_remove(event->dev, 1);
2355 const char *key_name = &rules->buf[cur->key.attr_off];
2356 char attr[UTIL_PATH_SIZE];
2357 char value[UTIL_NAME_SIZE];
2360 util_strlcpy(attr, key_name, sizeof(attr));
2361 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0) {
2362 util_strlcpy(attr, udev_device_get_syspath(event->dev), sizeof(attr));
2363 util_strlcat(attr, "/", sizeof(attr));
2364 util_strlcat(attr, key_name, sizeof(attr));
2367 attr_subst_subdir(attr, sizeof(attr));
2369 util_strlcpy(value, &rules->buf[cur->key.value_off], sizeof(value));
2370 udev_event_apply_format(event, value, sizeof(value));
2371 info(event->udev, "ATTR '%s' writing '%s' %s:%u\n", attr, value,
2372 &rules->buf[rule->rule.filename_off],
2373 rule->rule.filename_line);
2374 f = fopen(attr, "w");
2377 if (fprintf(f, "%s", value) <= 0)
2378 err(event->udev, "error writing ATTR{%s}: %m\n", attr);
2381 err(event->udev, "error opening ATTR{%s} for writing: %m\n", attr);
2387 struct udev_list_entry *list_entry;
2389 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2390 udev_list_cleanup_entries(event->udev, &event->run_list);
2391 info(event->udev, "RUN '%s' %s:%u\n",
2392 &rules->buf[cur->key.value_off],
2393 &rules->buf[rule->rule.filename_off],
2394 rule->rule.filename_line);
2395 list_entry = udev_list_entry_add(event->udev, &event->run_list,
2396 &rules->buf[cur->key.value_off], NULL, 1, 0);
2397 if (cur->key.ignore_error)
2398 udev_list_entry_set_flag(list_entry, 1);
2402 cur = &rules->tokens[cur->key.rule_goto];
2404 case TK_A_LAST_RULE:
2408 case TK_M_PARENTS_MIN:
2409 case TK_M_PARENTS_MAX:
2412 err(rules->udev, "wrong type %u\n", cur->type);
2419 /* fast-forward to next rule */
2420 cur = rule + rule->rule.token_count;
2421 dbg(rules->udev, "forward to rule: %u\n",
2422 (unsigned int) (cur - rules->tokens));