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
34 /* KEY=="", KEY!="", KEY+="", KEY="", KEY:="" */
47 static const char *operation_str[] = {
50 [OP_NOMATCH] = "nomatch",
51 [OP_MATCH_MAX] = "MATCH_MAX",
54 [OP_ASSIGN] = "assign",
55 [OP_ASSIGN_FINAL] = "assign-final",
58 enum string_glob_type {
60 GL_PLAIN, /* no special chars */
61 GL_GLOB, /* shell globs ?,*,[] */
62 GL_SPLIT, /* multi-value A|B */
63 GL_SPLIT_GLOB, /* multi-value with glob A*|B* */
64 GL_SOMETHING, /* commonly used "?*" */
69 static const char *string_glob_str[] = {
74 [GL_SPLIT_GLOB] = "split-glob",
75 [GL_SOMETHING] = "split-glob",
76 [GL_FORMAT] = "format",
80 /* tokens of a rule are sorted/handled in this order */
85 TK_M_ACTION, /* val */
86 TK_M_DEVPATH, /* val */
87 TK_M_KERNEL, /* val */
88 TK_M_DEVLINK, /* val */
90 TK_M_ENV, /* val, attr */
91 TK_M_SUBSYSTEM, /* val */
92 TK_M_DRIVER, /* val */
93 TK_M_WAITFOR, /* val */
94 TK_M_ATTR, /* val, attr */
97 TK_M_KERNELS, /* val */
98 TK_M_SUBSYSTEMS, /* val */
99 TK_M_DRIVERS, /* val */
100 TK_M_ATTRS, /* val, attr */
103 TK_M_TEST, /* val, mode_t */
104 TK_M_PROGRAM, /* val */
105 TK_M_IMPORT_FILE, /* val */
106 TK_M_IMPORT_PROG, /* val */
107 TK_M_IMPORT_PARENT, /* val */
108 TK_M_RESULT, /* val */
112 TK_A_STRING_ESCAPE_NONE,
113 TK_A_STRING_ESCAPE_REPLACE,
114 TK_A_NUM_FAKE_PART, /* int */
115 TK_A_DEVLINK_PRIO, /* int */
116 TK_A_OWNER, /* val */
117 TK_A_GROUP, /* val */
119 TK_A_OWNER_ID, /* uid_t */
120 TK_A_GROUP_ID, /* gid_t */
121 TK_A_MODE_ID, /* mode_t */
122 TK_A_ENV, /* val, attr */
124 TK_A_DEVLINK, /* val */
125 TK_A_EVENT_TIMEOUT, /* int */
127 TK_A_ATTR, /* val, attr */
128 TK_A_RUN, /* val, bool */
129 TK_A_GOTO, /* size_t */
135 static const char *token_str[] = {
136 [TK_UNSET] = "UNSET",
139 [TK_M_ACTION] = "M ACTION",
140 [TK_M_DEVPATH] = "M DEVPATH",
141 [TK_M_KERNEL] = "M KERNEL",
142 [TK_M_DEVLINK] = "M DEVLINK",
143 [TK_M_NAME] = "M NAME",
144 [TK_M_ENV] = "M ENV",
145 [TK_M_SUBSYSTEM] = "M SUBSYSTEM",
146 [TK_M_DRIVER] = "M DRIVER",
147 [TK_M_WAITFOR] = "M WAITFOR",
148 [TK_M_ATTR] = "M ATTR",
150 [TK_M_PARENTS_MIN] = "M PARENTS_MIN",
151 [TK_M_KERNELS] = "M KERNELS",
152 [TK_M_SUBSYSTEMS] = "M SUBSYSTEMS",
153 [TK_M_DRIVERS] = "M DRIVERS",
154 [TK_M_ATTRS] = "M ATTRS",
155 [TK_M_PARENTS_MAX] = "M PARENTS_MAX",
157 [TK_M_TEST] = "M TEST",
158 [TK_M_PROGRAM] = "M PROGRAM",
159 [TK_M_IMPORT_FILE] = "M IMPORT_FILE",
160 [TK_M_IMPORT_PROG] = "M IMPORT_PROG",
161 [TK_M_IMPORT_PARENT] = "M MPORT_PARENT",
162 [TK_M_RESULT] = "M RESULT",
163 [TK_M_MAX] = "M MAX",
165 [TK_A_IGNORE_DEVICE] = "A IGNORE_DEVICE",
166 [TK_A_STRING_ESCAPE_NONE] = "A STRING_ESCAPE_NONE",
167 [TK_A_STRING_ESCAPE_REPLACE] = "A STRING_ESCAPE_REPLACE",
168 [TK_A_NUM_FAKE_PART] = "A NUM_FAKE_PART",
169 [TK_A_DEVLINK_PRIO] = "A DEVLINK_PRIO",
170 [TK_A_OWNER] = "A OWNER",
171 [TK_A_GROUP] = "A GROUP",
172 [TK_A_MODE] = "A MODE",
173 [TK_A_OWNER_ID] = "A OWNER_ID",
174 [TK_A_GROUP_ID] = "A GROUP_ID",
175 [TK_A_MODE_ID] = "A MODE_ID",
176 [TK_A_ENV] = "A ENV",
177 [TK_A_NAME] = "A NAME",
178 [TK_A_DEVLINK] = "A DEVLINK",
179 [TK_A_EVENT_TIMEOUT] = "A EVENT_TIMEOUT",
180 [TK_A_IGNORE_REMOVE] = "A IGNORE_REMOVE",
181 [TK_A_ATTR] = "A ATTR",
182 [TK_A_RUN] = "A RUN",
183 [TK_A_GOTO] = "A GOTO",
184 [TK_A_LAST_RULE] = "A LAST_RULE",
189 /* we try to pack stuff in a way that we take only 16 bytes per token */
192 unsigned short type; /* same as in rule and key */
195 unsigned short flags;
196 unsigned int next_rule;
197 unsigned int label_off;
198 unsigned short filename_off;
199 unsigned short filename_line;
203 unsigned short flags;
206 unsigned int value_off;
208 unsigned int attr_off;
211 unsigned int rule_goto;
225 struct udev_rules *rules;
227 struct token token[MAX_TK];
228 unsigned int token_cur;
232 unsigned int name_off;
243 /* every key in the rules file becomes a token */
244 struct token *tokens;
245 unsigned int token_cur;
246 unsigned int token_max;
248 /* all key strings are copied to a single string buffer */
252 unsigned int buf_count;
254 /* during rule parsing, we cache uid/gid lookup results */
255 struct uid_gid *uids;
256 unsigned int uids_cur;
257 unsigned int uids_max;
258 struct uid_gid *gids;
259 unsigned int gids_cur;
260 unsigned int gids_max;
263 /* we could lookup and return existing strings, or tails of strings */
264 static int add_string(struct udev_rules *rules, const char *str)
266 size_t len = strlen(str)+1;
269 /* offset 0 is always '\0' */
273 /* grow buffer if needed */
274 if (rules->buf_cur + len+1 >= rules->buf_max) {
278 /* double the buffer size */
279 add = rules->buf_max;
283 buf = realloc(rules->buf, rules->buf_max + add);
286 info(rules->udev, "extend buffer from %zu to %zu\n", rules->buf_max, rules->buf_max + add);
288 rules->buf_max += add;
290 off = rules->buf_cur;
291 memcpy(&rules->buf[rules->buf_cur], str, len);
292 rules->buf_cur += len;
297 static int add_token(struct udev_rules *rules, struct token *token)
300 /* grow buffer if needed */
301 if (rules->token_cur+1 >= rules->token_max) {
302 struct token *tokens;
305 /* double the buffer size */
306 add = rules->token_max;
310 tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
313 info(rules->udev, "extend tokens from %u to %u\n", rules->token_max, rules->token_max + add);
314 rules->tokens = tokens;
315 rules->token_max += add;
317 memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
322 static uid_t add_uid(struct udev_rules *rules, const char *owner)
328 /* lookup, if we know it already */
329 for (i = 0; i < rules->uids_cur; i++) {
330 off = rules->uids[i].name_off;
331 if (strcmp(&rules->buf[off], owner) == 0) {
332 uid = rules->uids[i].uid;
333 dbg(rules->udev, "return existing %u for '%s'\n", uid, owner);
337 uid = util_lookup_user(rules->udev, owner);
339 /* grow buffer if needed */
340 if (rules->uids_cur+1 >= rules->uids_max) {
341 struct uid_gid *uids;
344 /* double the buffer size */
345 add = rules->uids_max;
349 uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
352 info(rules->udev, "extend uids from %u to %u\n", rules->uids_max, rules->uids_max + add);
354 rules->uids_max += add;
356 rules->uids[rules->uids_cur].uid = uid;
357 off = add_string(rules, owner);
360 rules->uids[rules->uids_cur].name_off = off;
365 static gid_t add_gid(struct udev_rules *rules, const char *group)
371 /* lookup, if we know it already */
372 for (i = 0; i < rules->gids_cur; i++) {
373 off = rules->gids[i].name_off;
374 if (strcmp(&rules->buf[off], group) == 0) {
375 gid = rules->gids[i].gid;
376 dbg(rules->udev, "return existing %u for '%s'\n", gid, group);
380 gid = util_lookup_group(rules->udev, group);
382 /* grow buffer if needed */
383 if (rules->gids_cur+1 >= rules->gids_max) {
384 struct uid_gid *gids;
387 /* double the buffer size */
388 add = rules->gids_max;
392 gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid));
395 info(rules->udev, "extend gids from %u to %u\n", rules->gids_max, rules->gids_max + add);
397 rules->gids_max += add;
399 rules->gids[rules->gids_cur].gid = gid;
400 off = add_string(rules, group);
403 rules->gids[rules->gids_cur].name_off = off;
408 static int import_property_from_string(struct udev_device *dev, char *line)
410 struct udev *udev = udev_device_get_udev(dev);
417 while (isspace(key[0]))
420 /* comment or empty line */
421 if (key[0] == '#' || key[0] == '\0')
424 /* split key/value */
425 val = strchr(key, '=');
432 while (isspace(val[0]))
439 while (isspace(key[len-1]))
443 /* terminate value */
447 while (isspace(val[len-1]))
455 if (val[0] == '"' || val[0] == '\'') {
456 if (val[len-1] != val[0]) {
457 info(udev, "inconsistent quoting: '%s', skip\n", line);
464 info(udev, "adding '%s'='%s'\n", key, val);
466 /* handle device, renamed by external tool, returning new path */
467 if (strcmp(key, "DEVPATH") == 0) {
468 char syspath[UTIL_PATH_SIZE];
470 info(udev, "updating devpath from '%s' to '%s'\n",
471 udev_device_get_devpath(dev), val);
472 util_strlcpy(syspath, udev_get_sys_path(udev), sizeof(syspath));
473 util_strlcat(syspath, val, sizeof(syspath));
474 udev_device_set_syspath(dev, syspath);
476 struct udev_list_entry *entry;
478 entry = udev_device_add_property(dev, key, val);
480 udev_list_entry_set_flag(entry, 1);
485 static int import_file_into_properties(struct udev_device *dev, const char *filename)
488 char line[UTIL_LINE_SIZE];
490 f = fopen(filename, "r");
493 while (fgets(line, sizeof(line), f) != NULL)
494 import_property_from_string(dev, line);
499 static int import_program_into_properties(struct udev_device *dev, const char *program)
501 struct udev *udev = udev_device_get_udev(dev);
507 envp = udev_device_get_properties_envp(dev);
508 if (util_run_program(udev, program, envp, result, sizeof(result), &reslen) != 0)
512 while (line != NULL) {
515 pos = strchr(line, '\n');
520 import_property_from_string(dev, line);
526 static int import_parent_into_properties(struct udev_device *dev, const char *filter)
528 struct udev *udev = udev_device_get_udev(dev);
529 struct udev_device *dev_parent;
530 struct udev_list_entry *list_entry;
532 dev_parent = udev_device_get_parent(dev);
533 if (dev_parent == NULL)
536 dbg(udev, "found parent '%s', get the node name\n", udev_device_get_syspath(dev_parent));
537 udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
538 const char *key = udev_list_entry_get_name(list_entry);
539 const char *val = udev_list_entry_get_value(list_entry);
541 if (fnmatch(filter, key, 0) == 0) {
542 struct udev_list_entry *entry;
544 dbg(udev, "import key '%s=%s'\n", key, val);
545 entry = udev_device_add_property(dev, key, val);
547 udev_list_entry_set_flag(entry, 1);
553 #define WAIT_LOOP_PER_SECOND 50
554 static int wait_for_file(struct udev_device *dev, const char *file, int timeout)
556 struct udev *udev = udev_device_get_udev(dev);
557 char filepath[UTIL_PATH_SIZE];
558 char devicepath[UTIL_PATH_SIZE];
560 int loop = timeout * WAIT_LOOP_PER_SECOND;
562 /* a relative path is a device attribute */
563 devicepath[0] = '\0';
564 if (file[0] != '/') {
565 util_strlcpy(devicepath, udev_get_sys_path(udev), sizeof(devicepath));
566 util_strlcat(devicepath, udev_device_get_devpath(dev), sizeof(devicepath));
568 util_strlcpy(filepath, devicepath, sizeof(filepath));
569 util_strlcat(filepath, "/", sizeof(filepath));
570 util_strlcat(filepath, file, sizeof(filepath));
574 dbg(udev, "will wait %i sec for '%s'\n", timeout, file);
577 if (stat(file, &stats) == 0) {
578 info(udev, "file '%s' appeared after %i loops\n", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
581 /* make sure, the device did not disappear in the meantime */
582 if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
583 info(udev, "device disappeared while waiting for '%s'\n", file);
586 info(udev, "wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND);
587 usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND);
589 info(udev, "waiting for '%s' failed\n", file);
593 static int attr_subst_subdir(char *attr, size_t len)
598 pos = strstr(attr, "/*/");
600 char str[UTIL_PATH_SIZE];
604 util_strlcpy(str, &pos[2], sizeof(str));
609 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
612 if (dent->d_name[0] == '.')
614 util_strlcat(attr, dent->d_name, len);
615 util_strlcat(attr, str, len);
616 if (stat(attr, &stats) == 0) {
625 util_strlcat(attr, str, len);
631 static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value)
637 if (linepos == NULL && linepos[0] == '\0')
640 /* skip whitespace */
641 while (isspace(linepos[0]) || linepos[0] == ',')
645 if (linepos[0] == '\0')
651 if (linepos[0] == '\0')
653 if (isspace(linepos[0]))
655 if (linepos[0] == '=')
657 if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
658 if (linepos[1] == '=')
662 /* remember end of key */
665 /* skip whitespace after key */
666 while (isspace(linepos[0]))
668 if (linepos[0] == '\0')
671 /* get operation type */
672 if (linepos[0] == '=' && linepos[1] == '=') {
675 } else if (linepos[0] == '!' && linepos[1] == '=') {
678 } else if (linepos[0] == '+' && linepos[1] == '=') {
681 } else if (linepos[0] == '=') {
684 } else if (linepos[0] == ':' && linepos[1] == '=') {
685 *op = OP_ASSIGN_FINAL;
693 /* skip whitespace after operator */
694 while (isspace(linepos[0]))
696 if (linepos[0] == '\0')
700 if (linepos[0] == '"')
707 temp = strchr(linepos, '"');
712 dbg(udev, "%s '%s'-'%s'\n", operation_str[*op], *key, *value);
714 /* move line to next key */
719 /* extract possible KEY{attr} */
720 static char *get_key_attribute(struct udev *udev, char *str)
725 attr = strchr(str, '{');
728 pos = strchr(attr, '}');
730 err(udev, "missing closing brace for format\n");
734 dbg(udev, "attribute='%s'\n", attr);
740 static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
741 enum operation_type op,
742 const char *value, const void *data)
744 struct token *token = &rule_tmp->token[rule_tmp->token_cur];
745 const char *attr = data;
746 enum string_glob_type glob;
748 memset(token, 0x00, sizeof(struct token));
760 case TK_M_SUBSYSTEMS:
763 case TK_M_IMPORT_FILE:
764 case TK_M_IMPORT_PROG:
765 case TK_M_IMPORT_PARENT:
773 token->key.value_off = add_string(rule_tmp->rules, value);
780 token->key.value_off = add_string(rule_tmp->rules, value);
781 token->key.attr_off = add_string(rule_tmp->rules, attr);
784 token->key.value_off = add_string(rule_tmp->rules, value);
786 token->key.mode = *(mode_t *)data;
788 case TK_A_IGNORE_DEVICE:
789 case TK_A_STRING_ESCAPE_NONE:
790 case TK_A_STRING_ESCAPE_REPLACE:
791 case TK_A_IGNORE_REMOVE:
795 token->key.value_off = add_string(rule_tmp->rules, value);
796 token->key.ignore_error = *(int *)data;
798 case TK_A_NUM_FAKE_PART:
799 token->key.num_fake_part = *(int *)data;
801 case TK_A_DEVLINK_PRIO:
802 token->key.devlink_prio = *(int *)data;
805 token->key.uid = *(uid_t *)data;
808 token->key.gid = *(gid_t *)data;
811 token->key.mode = *(mode_t *)data;
813 case TK_A_EVENT_TIMEOUT:
814 token->key.event_timeout = *(int *)data;
817 case TK_M_PARENTS_MIN:
818 case TK_M_PARENTS_MAX:
822 err(rule_tmp->rules->udev, "wrong type %u\n", type);
828 if (type < TK_M_MAX) {
829 /* check if we need to split or call fnmatch() while matching rules */
833 has_split = (strchr(value, '|') != NULL);
834 has_glob = (strchr(value, '*') != NULL || strchr(value, '?') != NULL ||
835 strchr(value, '[') != NULL || strchr(value, ']') != NULL);
836 if (has_split && has_glob) {
837 glob = GL_SPLIT_GLOB;
838 } else if (has_split) {
840 } else if (has_glob) {
841 if (strcmp(value, "?*") == 0)
847 /* check if we need to substitute format strings for matching rules */
848 if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
853 token->key.type = type;
855 token->key.glob = glob;
856 rule_tmp->token_cur++;
857 if (rule_tmp->token_cur >= ARRAY_SIZE(rule_tmp->token)) {
858 err(rule_tmp->rules->udev, "temporary rule array too small\n");
865 static void dump_token(struct udev_rules *rules, struct token *token)
867 enum token_type type = token->type;
868 enum operation_type op = token->key.op;
869 enum string_glob_type glob = token->key.glob;
870 const char *value = &rules->buf[token->key.value_off];
871 const char *attr = &rules->buf[token->key.attr_off];
876 const char *tks_ptr = (char *)rules->tokens;
877 const char *tk_ptr = (char *)token;
878 unsigned int off = tk_ptr - tks_ptr;
880 dbg(rules->udev, "* RULE %s:%u, off: %u(%u), next: %u, label: '%s', flags: 0x%02x\n",
881 &rules->buf[token->rule.filename_off], token->rule.filename_line,
882 off / (unsigned int) sizeof(struct token), off,
883 token->rule.next_rule,
884 &rules->buf[token->rule.label_off],
897 case TK_M_SUBSYSTEMS:
900 case TK_M_IMPORT_FILE:
901 case TK_M_IMPORT_PROG:
902 case TK_M_IMPORT_PARENT:
910 dbg(rules->udev, "%s %s '%s'(%s)\n",
911 token_str[type], operation_str[op], value, string_glob_str[glob]);
918 dbg(rules->udev, "%s %s '%s' '%s'(%s)\n",
919 token_str[type], operation_str[op], attr, value, string_glob_str[glob]);
921 case TK_A_IGNORE_DEVICE:
922 case TK_A_STRING_ESCAPE_NONE:
923 case TK_A_STRING_ESCAPE_REPLACE:
925 case TK_A_IGNORE_REMOVE:
926 dbg(rules->udev, "%s\n", token_str[type]);
929 dbg(rules->udev, "%s %s '%s'(%s) %#o\n",
930 token_str[type], operation_str[op], value, string_glob_str[glob], token->key.mode);
932 case TK_A_NUM_FAKE_PART:
933 dbg(rules->udev, "%s %u\n", token_str[type], token->key.num_fake_part);
935 case TK_A_DEVLINK_PRIO:
936 dbg(rules->udev, "%s %s %u\n", token_str[type], operation_str[op], token->key.devlink_prio);
939 dbg(rules->udev, "%s %s %u\n", token_str[type], operation_str[op], token->key.uid);
942 dbg(rules->udev, "%s %s %u\n", token_str[type], operation_str[op], token->key.gid);
945 dbg(rules->udev, "%s %s %#o\n", token_str[type], operation_str[op], token->key.mode);
947 case TK_A_EVENT_TIMEOUT:
948 dbg(rules->udev, "%s %s %u\n", token_str[type], operation_str[op], token->key.event_timeout);
951 dbg(rules->udev, "%s '%s' %u\n", token_str[type], value, token->key.rule_goto);
954 dbg(rules->udev, "* %s\n", token_str[type]);
956 case TK_M_PARENTS_MIN:
957 case TK_M_PARENTS_MAX:
960 dbg(rules->udev, "unknown type %u\n", type);
965 static void dump_rules(struct udev_rules *rules)
969 dbg(rules->udev, "dumping %u (%zu bytes) tokens, %u (%zu bytes) strings\n",
971 rules->token_cur * sizeof(struct token),
974 for(i = 0; i < rules->token_cur; i++)
975 dump_token(rules, &rules->tokens[i]);
978 static inline void dump_token(struct udev_rules *rules, struct token *token) {}
979 static inline void dump_rules(struct udev_rules *rules) {}
982 static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp)
985 unsigned int start = 0;
986 unsigned int end = rule_tmp->token_cur;
988 for (i = 0; i < rule_tmp->token_cur; i++) {
989 enum token_type next_val = TK_UNSET;
990 unsigned int next_idx;
993 /* find smallest value */
994 for (j = start; j < end; j++) {
995 if (rule_tmp->token[j].type == TK_UNSET)
997 if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
998 next_val = rule_tmp->token[j].type;
1003 /* add token and mark done */
1004 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
1006 rule_tmp->token[next_idx].type = TK_UNSET;
1009 if (next_idx == start)
1011 if (next_idx+1 == end)
1017 static int add_rule(struct udev_rules *rules, char *line,
1018 const char *filename, unsigned int filename_off, unsigned int lineno)
1024 struct rule_tmp rule_tmp;
1026 memset(&rule_tmp, 0x00, sizeof(struct rule_tmp));
1027 rule_tmp.rules = rules;
1028 rule_tmp.rule.type = TK_RULE;
1029 rule_tmp.rule.rule.filename_off = filename_off;
1030 rule_tmp.rule.rule.filename_line = lineno;
1036 enum operation_type op;
1038 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0)
1041 if (strcasecmp(key, "ACTION") == 0) {
1042 if (op > OP_MATCH_MAX) {
1043 err(rules->udev, "invalid ACTION operation\n");
1046 rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL);
1051 if (strcasecmp(key, "DEVPATH") == 0) {
1052 if (op > OP_MATCH_MAX) {
1053 err(rules->udev, "invalid DEVPATH operation\n");
1056 rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
1061 if (strcasecmp(key, "KERNEL") == 0) {
1062 if (op > OP_MATCH_MAX) {
1063 err(rules->udev, "invalid KERNEL operation\n");
1066 rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL);
1071 if (strcasecmp(key, "SUBSYSTEM") == 0) {
1072 if (op > OP_MATCH_MAX) {
1073 err(rules->udev, "invalid SUBSYSTEM operation\n");
1076 /* bus, class, subsystem events should all be the same */
1077 if (strcmp(value, "subsystem") == 0 ||
1078 strcmp(value, "bus") == 0 ||
1079 strcmp(value, "class") == 0) {
1080 if (strcmp(value, "bus") == 0 || strcmp(value, "class") == 0)
1081 err(rules->udev, "'%s' must be specified as 'subsystem' \n"
1082 "please fix it in %s:%u", value, filename, lineno);
1083 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
1085 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
1090 if (strcasecmp(key, "DRIVER") == 0) {
1091 if (op > OP_MATCH_MAX) {
1092 err(rules->udev, "invalid DRIVER operation\n");
1095 rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL);
1100 if (strncasecmp(key, "ATTR{", sizeof("ATTR{")-1) == 0) {
1101 attr = get_key_attribute(rules->udev, key + sizeof("ATTR")-1);
1103 err(rules->udev, "error parsing ATTR attribute\n");
1106 if (op < OP_MATCH_MAX) {
1107 rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
1109 rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr);
1115 if (strcasecmp(key, "KERNELS") == 0 ||
1116 strcasecmp(key, "ID") == 0) {
1117 if (op > OP_MATCH_MAX) {
1118 err(rules->udev, "invalid KERNELS operation\n");
1121 rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1126 if (strcasecmp(key, "SUBSYSTEMS") == 0 ||
1127 strcasecmp(key, "BUS") == 0) {
1128 if (op > OP_MATCH_MAX) {
1129 err(rules->udev, "invalid SUBSYSTEMS operation\n");
1132 rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1137 if (strcasecmp(key, "DRIVERS") == 0) {
1138 if (op > OP_MATCH_MAX) {
1139 err(rules->udev, "invalid DRIVERS operation\n");
1142 rule_add_key(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
1147 if (strncasecmp(key, "ATTRS{", sizeof("ATTRS{")-1) == 0 ||
1148 strncasecmp(key, "SYSFS{", sizeof("SYSFS{")-1) == 0) {
1149 if (op > OP_MATCH_MAX) {
1150 err(rules->udev, "invalid ATTRS operation\n");
1153 attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
1155 err(rules->udev, "error parsing ATTRS attribute\n");
1158 if (strncmp(attr, "device/", 7) == 0)
1159 err(rules->udev, "the 'device' link may not be available in a future kernel, "
1160 "please fix it in %s:%u", filename, lineno);
1161 else if (strstr(attr, "../") != NULL)
1162 err(rules->udev, "do not reference parent sysfs directories directly, "
1163 "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
1164 rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1169 if (strncasecmp(key, "ENV{", sizeof("ENV{")-1) == 0) {
1170 attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1);
1172 err(rules->udev, "error parsing ENV attribute\n");
1175 if (strncmp(attr, "PHYSDEV", 7) == 0)
1177 if (op < OP_MATCH_MAX) {
1178 if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
1181 if (rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
1188 if (strcasecmp(key, "PROGRAM") == 0) {
1189 rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
1194 if (strcasecmp(key, "RESULT") == 0) {
1195 if (op > OP_MATCH_MAX) {
1196 err(rules->udev, "invalid RESULT operation\n");
1199 rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL);
1204 if (strncasecmp(key, "IMPORT", sizeof("IMPORT")-1) == 0) {
1205 attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1);
1206 if (attr != NULL && strstr(attr, "program")) {
1207 dbg(rules->udev, "IMPORT will be executed\n");
1208 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1210 } else if (attr != NULL && strstr(attr, "file")) {
1211 dbg(rules->udev, "IMPORT will be included as file\n");
1212 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1214 } else if (attr != NULL && strstr(attr, "parent")) {
1215 dbg(rules->udev, "IMPORT will include the parent values\n");
1216 rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
1219 /* figure it out if it is executable */
1220 char file[UTIL_PATH_SIZE];
1222 struct stat statbuf;
1224 util_strlcpy(file, value, sizeof(file));
1225 pos = strchr(file, ' ');
1229 /* allow programs in /lib/udev called without the path */
1230 if (strchr(file, '/') == NULL) {
1231 util_strlcpy(file, UDEV_PREFIX "/lib/udev/", sizeof(file));
1232 util_strlcat(file, value, sizeof(file));
1233 pos = strchr(file, ' ');
1238 dbg(rules->udev, "IMPORT auto mode for '%s'\n", file);
1239 if (!lstat(file, &statbuf) && (statbuf.st_mode & S_IXUSR)) {
1240 dbg(rules->udev, "IMPORT will be executed (autotype)\n");
1241 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1244 dbg(rules->udev, "IMPORT will be included as file (autotype)\n");
1245 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1252 if (strncasecmp(key, "TEST", sizeof("TEST")-1) == 0) {
1255 if (op > OP_MATCH_MAX) {
1256 err(rules->udev, "invalid TEST operation\n");
1259 attr = get_key_attribute(rules->udev, key + sizeof("TEST")-1);
1261 mode = strtol(attr, NULL, 8);
1262 rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode);
1264 rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL);
1270 if (strncasecmp(key, "RUN", sizeof("RUN")-1) == 0) {
1273 attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1);
1274 if (attr != NULL && strstr(attr, "ignore_error"))
1276 rule_add_key(&rule_tmp, TK_A_RUN, op, value, &flag);
1281 if (strcasecmp(key, "WAIT_FOR") == 0 || strcasecmp(key, "WAIT_FOR_SYSFS") == 0) {
1282 rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1287 if (strcasecmp(key, "LABEL") == 0) {
1288 rule_tmp.rule.rule.label_off = add_string(rules, value);
1293 if (strcasecmp(key, "GOTO") == 0) {
1294 rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1299 if (strncasecmp(key, "NAME", sizeof("NAME")-1) == 0) {
1300 if (op < OP_MATCH_MAX) {
1301 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
1303 if (value[0] == '\0')
1304 dbg(rules->udev, "name empty, node creation suppressed\n");
1305 rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL);
1306 attr = get_key_attribute(rules->udev, key + sizeof("NAME")-1);
1308 if (strstr(attr, "all_partitions") != NULL) {
1309 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1311 dbg(rules->udev, "creation of partition nodes requested\n");
1312 rule_add_key(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1314 if (strstr(attr, "ignore_remove") != NULL) {
1315 dbg(rules->udev, "remove event should be ignored\n");
1316 rule_add_key(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1320 rule_tmp.rule.rule.flags = 1;
1324 if (strcasecmp(key, "SYMLINK") == 0) {
1325 if (op < OP_MATCH_MAX)
1326 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
1328 rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, NULL);
1329 rule_tmp.rule.rule.flags = 1;
1334 if (strcasecmp(key, "OWNER") == 0) {
1338 uid = strtoul(value, &endptr, 10);
1339 if (endptr[0] == '\0') {
1340 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1341 } else if (rules->resolve_names && strchr("$%", value[0]) == NULL) {
1342 uid = add_uid(rules, value);
1343 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1345 rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
1347 rule_tmp.rule.rule.flags = 1;
1352 if (strcasecmp(key, "GROUP") == 0) {
1356 gid = strtoul(value, &endptr, 10);
1357 if (endptr[0] == '\0') {
1358 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1359 } else if (rules->resolve_names && strchr("$%", value[0]) == NULL) {
1360 gid = add_gid(rules, value);
1361 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1363 rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
1365 rule_tmp.rule.rule.flags = 1;
1370 if (strcasecmp(key, "MODE") == 0) {
1374 mode = strtol(value, &endptr, 8);
1375 if (endptr[0] == '\0')
1376 rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1378 rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
1379 rule_tmp.rule.rule.flags = 1;
1384 if (strcasecmp(key, "OPTIONS") == 0) {
1387 if (strstr(value, "last_rule") != NULL) {
1388 dbg(rules->udev, "last rule to be applied\n");
1389 rule_add_key(&rule_tmp, TK_A_LAST_RULE, 0, NULL, NULL);
1391 if (strstr(value, "ignore_device") != NULL) {
1392 dbg(rules->udev, "device should be ignored\n");
1393 rule_add_key(&rule_tmp, TK_A_IGNORE_DEVICE, 0, NULL, NULL);
1395 if (strstr(value, "ignore_remove") != NULL) {
1396 dbg(rules->udev, "remove event should be ignored\n");
1397 rule_add_key(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1399 pos = strstr(value, "link_priority=");
1401 int prio = atoi(&pos[strlen("link_priority=")]);
1403 rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, 0, NULL, &prio);
1404 dbg(rules->udev, "link priority=%i\n", prio);
1406 pos = strstr(value, "event_timeout=");
1408 int tout = atoi(&pos[strlen("event_timeout=")]);
1410 rule_add_key(&rule_tmp, TK_A_EVENT_TIMEOUT, 0, NULL, &tout);
1411 dbg(rules->udev, "event timout=%i\n", tout);
1413 pos = strstr(value, "string_escape=");
1415 pos = &pos[strlen("string_escape=")];
1416 if (strncmp(pos, "none", strlen("none")) == 0)
1417 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, 0, NULL, NULL);
1418 else if (strncmp(pos, "replace", strlen("replace")) == 0)
1419 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, 0, NULL, NULL);
1421 if (strstr(value, "all_partitions") != NULL) {
1422 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1424 rule_add_key(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1425 dbg(rules->udev, "creation of partition nodes requested\n");
1430 err(rules->udev, "unknown key '%s' in %s:%u\n", key, filename, lineno);
1434 err(rules->udev, "PHYSDEV* values are deprecated and not available on recent kernels, \n"
1435 "please fix it in %s:%u", filename, lineno);
1437 /* skip line if not any valid key was found */
1441 /* add rule token */
1442 if (add_token(rules, &rule_tmp.rule) != 0)
1445 /* add tokens to list, sorted by type */
1446 if (sort_token(rules, &rule_tmp) != 0)
1450 err(rules->udev, "invalid rule '%s:%u'\n", filename, lineno);
1454 static int parse_file(struct udev_rules *rules, const char *filename, unsigned short filename_off)
1457 unsigned int first_token;
1458 char line[UTIL_LINE_SIZE];
1462 info(rules->udev, "reading '%s' as rules file\n", filename);
1464 f = fopen(filename, "r");
1468 first_token = rules->token_cur;
1470 while(fgets(line, sizeof(line), f) != NULL) {
1474 /* skip whitespace */
1477 while (isspace(key[0]))
1488 /* continue reading if backslash+newline is found */
1489 while (line[len-2] == '\\') {
1490 if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1496 if (len+1 >= sizeof(line)) {
1497 err(rules->udev, "line too long '%s':%u, ignored\n", filename, line_nr);
1500 add_rule(rules, key, filename, filename_off, line_nr);
1504 /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1505 for (i = first_token+1; i < rules->token_cur; i++) {
1506 if (rules->tokens[i].type == TK_A_GOTO) {
1507 char *label = &rules->buf[rules->tokens[i].key.value_off];
1510 for (j = i+1; j < rules->token_cur; j++) {
1511 if (rules->tokens[j].type != TK_RULE)
1513 if (rules->tokens[j].rule.label_off == 0)
1515 if (strcmp(label, &rules->buf[rules->tokens[j].rule.label_off]) != 0)
1517 rules->tokens[i].key.rule_goto = j;
1519 if (rules->tokens[i].key.rule_goto == 0)
1520 err(rules->udev, "GOTO '%s' has no matching label in: '%s'\n", label, filename);
1526 static int add_matching_files(struct udev *udev, struct udev_list_node *file_list, const char *dirname, const char *suffix)
1530 char filename[UTIL_PATH_SIZE];
1532 dbg(udev, "open directory '%s'\n", dirname);
1533 dir = opendir(dirname);
1535 err(udev, "unable to open '%s': %m\n", dirname);
1541 if (ent == NULL || ent->d_name[0] == '\0')
1544 if ((ent->d_name[0] == '.') || (ent->d_name[0] == '#'))
1547 /* look for file matching with specified suffix */
1548 if (suffix != NULL) {
1551 ext = strrchr(ent->d_name, '.');
1554 if (strcmp(ext, suffix) != 0)
1557 dbg(udev, "put file '%s/%s' into list\n", dirname, ent->d_name);
1559 snprintf(filename, sizeof(filename), "%s/%s", dirname, ent->d_name);
1560 filename[sizeof(filename)-1] = '\0';
1561 udev_list_entry_add(udev, file_list, filename, NULL, 1, 1);
1568 struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
1570 struct udev_rules *rules;
1571 struct stat statbuf;
1572 struct udev_list_node file_list;
1573 struct udev_list_entry *file_loop, *file_tmp;
1574 unsigned int prev_rule;
1575 struct token end_token;
1578 rules = malloc(sizeof(struct udev_rules));
1581 memset(rules, 0x00, sizeof(struct udev_rules));
1583 rules->resolve_names = resolve_names;
1584 udev_list_init(&file_list);
1586 /* init token array and string buffer */
1587 rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
1588 if (rules->tokens == NULL)
1590 rules->token_max = PREALLOC_TOKEN;
1591 rules->buf = malloc(PREALLOC_STRBUF);
1592 if (rules->buf == NULL)
1594 rules->buf_max = PREALLOC_STRBUF;
1595 /* offset 0 is always '\0' */
1596 rules->buf[0] = '\0';
1598 info(udev, "prealloc %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1599 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1601 if (udev_get_rules_path(udev) != NULL) {
1602 /* custom rules location for testing */
1603 add_matching_files(udev, &file_list, udev_get_rules_path(udev), ".rules");
1605 char filename[PATH_MAX];
1606 struct udev_list_node sort_list;
1607 struct udev_list_entry *sort_loop, *sort_tmp;
1609 /* read user/custom rules */
1610 add_matching_files(udev, &file_list, SYSCONFDIR "/udev/rules.d", ".rules");
1612 /* read dynamic/temporary rules */
1613 util_strlcpy(filename, udev_get_dev_path(udev), sizeof(filename));
1614 util_strlcat(filename, "/.udev/rules.d", sizeof(filename));
1615 if (stat(filename, &statbuf) != 0) {
1616 util_create_path(udev, filename);
1617 udev_selinux_setfscreatecon(udev, filename, S_IFDIR|0755);
1618 mkdir(filename, 0755);
1619 udev_selinux_resetfscreatecon(udev);
1621 udev_list_init(&sort_list);
1622 add_matching_files(udev, &sort_list, filename, ".rules");
1624 /* read default rules */
1625 add_matching_files(udev, &sort_list, UDEV_PREFIX "/lib/udev/rules.d", ".rules");
1627 /* sort all rules files by basename into list of files */
1628 udev_list_entry_foreach_safe(sort_loop, sort_tmp, udev_list_get_entry(&sort_list)) {
1629 const char *sort_name = udev_list_entry_get_name(sort_loop);
1630 const char *sort_base = strrchr(sort_name, '/');
1632 if (sort_base == NULL)
1635 udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1636 const char *file_name = udev_list_entry_get_name(file_loop);
1637 const char *file_base = strrchr(file_name, '/');
1639 if (file_base == NULL)
1641 if (strcmp(file_base, sort_base) == 0) {
1642 info(udev, "rule file basename '%s' already added, ignoring '%s'\n",
1643 file_name, sort_name);
1644 udev_list_entry_remove(sort_loop);
1648 if (strcmp(file_base, sort_base) > 0)
1651 if (sort_loop != NULL)
1652 udev_list_entry_move_before(sort_loop, file_loop);
1656 /* add all filenames to the string buffer */
1657 udev_list_entry_foreach(file_loop, udev_list_get_entry(&file_list)) {
1658 const char *filename = udev_list_entry_get_name(file_loop);
1659 unsigned int filename_off;
1661 filename_off = add_string(rules, filename);
1662 /* the offset in the rule is limited to unsigned short */
1663 if (filename_off < USHRT_MAX)
1664 udev_list_entry_set_flag(file_loop, filename_off);
1667 /* parse list of files */
1668 udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1669 const char *filename = udev_list_entry_get_name(file_loop);
1670 unsigned int filename_off = udev_list_entry_get_flag(file_loop);
1672 if (stat(filename, &statbuf) == 0 && statbuf.st_size > 0)
1673 parse_file(rules, filename, filename_off);
1675 info(udev, "can not read '%s'\n", filename);
1676 udev_list_entry_remove(file_loop);
1679 memset(&end_token, 0x00, sizeof(struct token));
1680 end_token.type = TK_END;
1681 add_token(rules, &end_token);
1683 /* link all TK_RULE tokens to be able to fast-forward to next TK_RULE */
1685 for (i = 1; i < rules->token_cur; i++) {
1686 if (rules->tokens[i].type == TK_RULE) {
1687 rules->tokens[prev_rule].rule.next_rule = i;
1692 /* shrink allocated token and string buffer */
1693 if (rules->token_cur < rules->token_max) {
1694 struct token *tokens;
1696 tokens = realloc(rules->tokens, rules->token_cur * sizeof(struct token));
1697 if (tokens != NULL || rules->token_cur == 0) {
1698 rules->tokens = tokens;
1699 rules->token_max = rules->token_cur;
1702 if (rules->buf_cur < rules->buf_max) {
1705 buf = realloc(rules->buf, rules->buf_cur);
1706 if (buf != NULL || rules->buf_cur == 0) {
1708 rules->buf_max = rules->buf_cur;
1711 info(udev, "shrunk to %lu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1712 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1714 /* cleanup uid/gid cache */
1717 rules->uids_cur = 0;
1718 rules->uids_max = 0;
1721 rules->gids_cur = 0;
1722 rules->gids_max = 0;
1728 void udev_rules_unref(struct udev_rules *rules)
1732 free(rules->tokens);
1739 static int match_key(struct udev_rules *rules, struct token *token, const char *val)
1741 char *key_value = &rules->buf[token->key.value_off];
1748 switch (token->key.glob) {
1750 match = (strcmp(key_value, val) == 0);
1753 match = (fnmatch(key_value, val, 0) == 0);
1760 split = &rules->buf[token->key.value_off];
1765 next = strchr(split, '|');
1767 size_t matchlen = (size_t)(next - split);
1769 match = (matchlen == len && strncmp(split, val, matchlen) == 0);
1773 match = (strcmp(split, val) == 0);
1782 char value[UTIL_PATH_SIZE];
1784 util_strlcpy(value, &rules->buf[token->key.value_off], sizeof(value));
1786 while (key_value != NULL) {
1787 pos = strchr(key_value, '|');
1792 dbg(rules->udev, "match %s '%s' <-> '%s'\n", token_str[token->type], key_value, val);
1793 match = (fnmatch(key_value, val, 0) == 0);
1801 match = (val[0] != '\0');
1808 if (match && (token->key.op == OP_MATCH)) {
1809 dbg(rules->udev, "%s is true (matching value)\n", token_str[token->type]);
1812 if (!match && (token->key.op == OP_NOMATCH)) {
1813 dbg(rules->udev, "%s is true (non-matching value)\n", token_str[token->type]);
1816 dbg(rules->udev, "%s is not true\n", token_str[token->type]);
1820 static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur)
1822 const char *key_name = &rules->buf[cur->key.attr_off];
1823 const char *key_value = &rules->buf[cur->key.value_off];
1824 char value[UTIL_NAME_SIZE];
1828 if (key_name[0] == '[') {
1829 char attr[UTIL_PATH_SIZE];
1831 util_strlcpy(attr, key_name, sizeof(attr));
1832 util_resolve_subsys_kernel(event->udev, attr, value, sizeof(value), 1);
1834 if (value[0] == '\0') {
1837 val = udev_device_get_sysattr_value(dev, key_name);
1840 util_strlcpy(value, val, sizeof(value));
1843 /* strip trailing whitespace of value, if not asked to match for it */
1844 len = strlen(key_value);
1845 if (len > 0 && !isspace(key_value[len-1])) {
1846 len = strlen(value);
1847 while (len > 0 && isspace(value[--len]))
1849 dbg(rules->udev, "removed trailing whitespace from '%s'\n", value);
1851 return match_key(rules, cur, value);
1860 int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event)
1864 enum escape_type esc = ESCAPE_UNSET;
1867 if (rules->tokens == NULL)
1870 can_set_name = ((strcmp(udev_device_get_action(event->dev), "add") == 0 ||
1871 strcmp(udev_device_get_action(event->dev), "change") == 0) &&
1872 (major(udev_device_get_devnum(event->dev)) > 0 ||
1873 strcmp(udev_device_get_subsystem(event->dev), "net") == 0));
1875 /* loop through token list, match, run actions or forward to next rule */
1876 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 info(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 info(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 if (util_run_program(event->udev, program, envp, result, sizeof(result), NULL) != 0) {
2068 if (cur->key.op != OP_NOMATCH)
2073 util_remove_trailing_chars(result, '\n');
2074 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2075 count = util_replace_chars(result, ALLOWED_CHARS_INPUT);
2077 info(event->udev, "%i character(s) replaced\n" , count);
2079 event->program_result = strdup(result);
2080 dbg(event->udev, "storing result '%s'\n", event->program_result);
2081 if (cur->key.op == OP_NOMATCH)
2086 case TK_M_IMPORT_FILE:
2088 char import[UTIL_PATH_SIZE];
2090 util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));
2091 udev_event_apply_format(event, import, sizeof(import));
2092 if (import_file_into_properties(event->dev, import) != 0)
2093 if (cur->key.op != OP_NOMATCH)
2097 case TK_M_IMPORT_PROG:
2099 char import[UTIL_PATH_SIZE];
2101 util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));
2102 udev_event_apply_format(event, import, sizeof(import));
2103 if (import_program_into_properties(event->dev, import) != 0)
2104 if (cur->key.op != OP_NOMATCH)
2108 case TK_M_IMPORT_PARENT:
2110 char import[UTIL_PATH_SIZE];
2112 util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));
2113 udev_event_apply_format(event, import, sizeof(import));
2114 if (import_parent_into_properties(event->dev, import) != 0)
2115 if (cur->key.op != OP_NOMATCH)
2120 if (match_key(rules, cur, event->program_result) != 0)
2124 case TK_A_IGNORE_DEVICE:
2125 event->ignore_device = 1;
2128 case TK_A_STRING_ESCAPE_NONE:
2131 case TK_A_STRING_ESCAPE_REPLACE:
2132 esc = ESCAPE_REPLACE;
2134 case TK_A_NUM_FAKE_PART:
2135 if (strcmp(udev_device_get_subsystem(event->dev), "block") != 0)
2137 if (udev_device_get_sysnum(event->dev) != NULL)
2139 udev_device_set_num_fake_partitions(event->dev, cur->key.num_fake_part);
2141 case TK_A_DEVLINK_PRIO:
2142 udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
2146 char owner[UTIL_NAME_SIZE];
2148 if (event->owner_final)
2150 if (cur->key.op == OP_ASSIGN_FINAL)
2151 event->owner_final = 1;
2152 util_strlcpy(owner, &rules->buf[cur->key.value_off], sizeof(owner));
2153 udev_event_apply_format(event, owner, sizeof(owner));
2154 event->uid = util_lookup_user(event->udev, owner);
2155 info(event->udev, "OWNER %u %s:%u\n",
2157 &rules->buf[rule->rule.filename_off],
2158 rule->rule.filename_line);
2163 char group[UTIL_NAME_SIZE];
2165 if (event->group_final)
2167 if (cur->key.op == OP_ASSIGN_FINAL)
2168 event->group_final = 1;
2169 util_strlcpy(group, &rules->buf[cur->key.value_off], sizeof(group));
2170 udev_event_apply_format(event, group, sizeof(group));
2171 event->gid = util_lookup_group(event->udev, group);
2172 info(event->udev, "GROUP %u %s:%u\n",
2174 &rules->buf[rule->rule.filename_off],
2175 rule->rule.filename_line);
2180 char mode[UTIL_NAME_SIZE];
2183 if (event->mode_final)
2185 if (cur->key.op == OP_ASSIGN_FINAL)
2186 event->mode_final = 1;
2187 util_strlcpy(mode, &rules->buf[cur->key.value_off], sizeof(mode));
2188 udev_event_apply_format(event, mode, sizeof(mode));
2189 event->mode = strtol(mode, &endptr, 8);
2190 if (endptr[0] != '\0') {
2191 err(event->udev, "invalide mode '%s' set default mode 0660\n", mode);
2194 info(event->udev, "MODE %#o %s:%u\n",
2196 &rules->buf[rule->rule.filename_off],
2197 rule->rule.filename_line);
2201 if (event->owner_final)
2203 if (cur->key.op == OP_ASSIGN_FINAL)
2204 event->owner_final = 1;
2205 event->uid = cur->key.uid;
2206 info(event->udev, "OWNER %u %s:%u\n",
2208 &rules->buf[rule->rule.filename_off],
2209 rule->rule.filename_line);
2212 if (event->group_final)
2214 if (cur->key.op == OP_ASSIGN_FINAL)
2215 event->group_final = 1;
2216 event->gid = cur->key.gid;
2217 info(event->udev, "GROUP %u %s:%u\n",
2219 &rules->buf[rule->rule.filename_off],
2220 rule->rule.filename_line);
2223 if (event->mode_final)
2225 if (cur->key.op == OP_ASSIGN_FINAL)
2226 event->mode_final = 1;
2227 event->mode = cur->key.mode;
2228 info(event->udev, "MODE %#o %s:%u\n",
2230 &rules->buf[rule->rule.filename_off],
2231 rule->rule.filename_line);
2235 const char *name = &rules->buf[cur->key.attr_off];
2236 char *value = &rules->buf[cur->key.value_off];
2238 if (value[0] != '\0') {
2239 char temp_value[UTIL_NAME_SIZE];
2240 struct udev_list_entry *entry;
2242 util_strlcpy(temp_value, value, sizeof(temp_value));
2243 udev_event_apply_format(event, temp_value, sizeof(temp_value));
2244 entry = udev_device_add_property(event->dev, name, temp_value);
2246 udev_list_entry_set_flag(entry, 1);
2248 udev_device_add_property(event->dev, name, NULL);
2254 const char *name = &rules->buf[cur->key.value_off];
2255 char name_str[UTIL_PATH_SIZE];
2258 if (event->name_final)
2260 if (cur->key.op == OP_ASSIGN_FINAL)
2261 event->name_final = 1;
2262 if (name[0] == '\0') {
2267 util_strlcpy(name_str, name, sizeof(name_str));
2268 udev_event_apply_format(event, name_str, sizeof(name_str));
2269 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2270 count = util_replace_chars(name_str, ALLOWED_CHARS_FILE);
2272 info(event->udev, "%i character(s) replaced\n", count);
2274 event->name = strdup(name_str);
2275 info(event->udev, "NAME '%s' %s:%u\n",
2277 &rules->buf[rule->rule.filename_off],
2278 rule->rule.filename_line);
2284 char temp[UTIL_PATH_SIZE];
2285 char filename[UTIL_PATH_SIZE];
2289 if (event->devlink_final)
2291 if (major(udev_device_get_devnum(event->dev)) == 0)
2293 if (cur->key.op == OP_ASSIGN_FINAL)
2294 event->devlink_final = 1;
2295 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2296 udev_device_cleanup_devlinks_list(event->dev);
2298 /* allow multiple symlinks separated by spaces */
2299 util_strlcpy(temp, &rules->buf[cur->key.value_off], sizeof(temp));
2300 udev_event_apply_format(event, temp, sizeof(temp));
2301 if (esc == ESCAPE_UNSET)
2302 count = util_replace_chars(temp, ALLOWED_CHARS_FILE " ");
2303 else if (esc == ESCAPE_REPLACE)
2304 count = util_replace_chars(temp, ALLOWED_CHARS_FILE);
2306 info(event->udev, "%i character(s) replaced\n" , count);
2307 dbg(event->udev, "rule applied, added symlink(s) '%s'\n", temp);
2309 while (isspace(pos[0]))
2311 next = strchr(pos, ' ');
2314 info(event->udev, "LINK '%s' %s:%u\n",
2316 &rules->buf[rule->rule.filename_off],
2317 rule->rule.filename_line);
2318 util_strlcpy(filename, udev_get_dev_path(event->udev), sizeof(filename));
2319 util_strlcat(filename, "/", sizeof(filename));
2320 util_strlcat(filename, pos, sizeof(filename));
2321 udev_device_add_devlink(event->dev, filename);
2322 while (isspace(next[1]))
2325 next = strchr(pos, ' ');
2327 if (pos[0] != '\0') {
2328 info(event->udev, "LINK '%s' %s:%u\n",
2330 &rules->buf[rule->rule.filename_off],
2331 rule->rule.filename_line);
2332 util_strlcpy(filename, udev_get_dev_path(event->udev), sizeof(filename));
2333 util_strlcat(filename, "/", sizeof(filename));
2334 util_strlcat(filename, pos, sizeof(filename));
2335 udev_device_add_devlink(event->dev, filename);
2339 case TK_A_EVENT_TIMEOUT:
2340 udev_device_set_event_timeout(event->dev, cur->key.event_timeout);
2342 case TK_A_IGNORE_REMOVE:
2343 udev_device_set_ignore_remove(event->dev, 1);
2347 const char *key_name = &rules->buf[cur->key.attr_off];
2348 char attr[UTIL_PATH_SIZE];
2349 char value[UTIL_NAME_SIZE];
2352 util_strlcpy(attr, key_name, sizeof(attr));
2353 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0) {
2354 util_strlcpy(attr, udev_device_get_syspath(event->dev), sizeof(attr));
2355 util_strlcat(attr, "/", sizeof(attr));
2356 util_strlcat(attr, key_name, sizeof(attr));
2359 attr_subst_subdir(attr, sizeof(attr));
2361 util_strlcpy(value, &rules->buf[cur->key.value_off], sizeof(value));
2362 udev_event_apply_format(event, value, sizeof(value));
2363 info(event->udev, "writing '%s' to sysfs file '%s'\n", value, attr);
2364 f = fopen(attr, "w");
2367 if (fprintf(f, "%s", value) <= 0)
2368 err(event->udev, "error writing ATTR{%s}: %m\n", attr);
2371 err(event->udev, "error opening ATTR{%s} for writing: %m\n", attr);
2377 struct udev_list_entry *list_entry;
2379 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2380 udev_list_cleanup_entries(event->udev, &event->run_list);
2381 info(event->udev, "RUN '%s' %s:%u\n",
2382 &rules->buf[cur->key.value_off],
2383 &rules->buf[rule->rule.filename_off],
2384 rule->rule.filename_line);
2385 list_entry = udev_list_entry_add(event->udev, &event->run_list,
2386 &rules->buf[cur->key.value_off], NULL, 1, 0);
2387 if (cur->key.ignore_error)
2388 udev_list_entry_set_flag(list_entry, 1);
2392 cur = &rules->tokens[cur->key.rule_goto];
2394 case TK_A_LAST_RULE:
2398 case TK_M_PARENTS_MIN:
2399 case TK_M_PARENTS_MAX:
2402 err(rules->udev, "wrong type %u\n", cur->type);
2409 /* fast-forward to next rule */
2410 idx = rule->rule.next_rule;
2413 dbg(rules->udev, "forward to rule: %u\n", idx);
2414 cur = &rules->tokens[idx];