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(enum operation_type type)
189 static const char *operation_strs[] = {
190 [OP_UNSET] = "UNSET",
191 [OP_MATCH] = "match",
192 [OP_NOMATCH] = "nomatch",
193 [OP_MATCH_MAX] = "MATCH_MAX",
196 [OP_ASSIGN] = "assign",
197 [OP_ASSIGN_FINAL] = "assign-final",
200 return operation_strs[type];
203 static const char *string_glob_str(enum string_glob_type type)
205 static const char *string_glob_strs[] = {
206 [GL_UNSET] = "UNSET",
207 [GL_PLAIN] = "plain",
209 [GL_SPLIT] = "split",
210 [GL_SPLIT_GLOB] = "split-glob",
211 [GL_SOMETHING] = "split-glob",
212 [GL_FORMAT] = "format",
215 return string_glob_strs[type];
218 static const char *token_str(enum token_type type)
220 static const char *token_strs[] = {
221 [TK_UNSET] = "UNSET",
224 [TK_M_ACTION] = "M ACTION",
225 [TK_M_DEVPATH] = "M DEVPATH",
226 [TK_M_KERNEL] = "M KERNEL",
227 [TK_M_DEVLINK] = "M DEVLINK",
228 [TK_M_NAME] = "M NAME",
229 [TK_M_ENV] = "M ENV",
230 [TK_M_SUBSYSTEM] = "M SUBSYSTEM",
231 [TK_M_DRIVER] = "M DRIVER",
232 [TK_M_WAITFOR] = "M WAITFOR",
233 [TK_M_ATTR] = "M ATTR",
235 [TK_M_PARENTS_MIN] = "M PARENTS_MIN",
236 [TK_M_KERNELS] = "M KERNELS",
237 [TK_M_SUBSYSTEMS] = "M SUBSYSTEMS",
238 [TK_M_DRIVERS] = "M DRIVERS",
239 [TK_M_ATTRS] = "M ATTRS",
240 [TK_M_PARENTS_MAX] = "M PARENTS_MAX",
242 [TK_M_TEST] = "M TEST",
243 [TK_M_PROGRAM] = "M PROGRAM",
244 [TK_M_IMPORT_FILE] = "M IMPORT_FILE",
245 [TK_M_IMPORT_PROG] = "M IMPORT_PROG",
246 [TK_M_IMPORT_PARENT] = "M MPORT_PARENT",
247 [TK_M_RESULT] = "M RESULT",
248 [TK_M_MAX] = "M MAX",
250 [TK_A_IGNORE_DEVICE] = "A IGNORE_DEVICE",
251 [TK_A_STRING_ESCAPE_NONE] = "A STRING_ESCAPE_NONE",
252 [TK_A_STRING_ESCAPE_REPLACE] = "A STRING_ESCAPE_REPLACE",
253 [TK_A_NUM_FAKE_PART] = "A NUM_FAKE_PART",
254 [TK_A_DEVLINK_PRIO] = "A DEVLINK_PRIO",
255 [TK_A_OWNER] = "A OWNER",
256 [TK_A_GROUP] = "A GROUP",
257 [TK_A_MODE] = "A MODE",
258 [TK_A_OWNER_ID] = "A OWNER_ID",
259 [TK_A_GROUP_ID] = "A GROUP_ID",
260 [TK_A_MODE_ID] = "A MODE_ID",
261 [TK_A_ENV] = "A ENV",
262 [TK_A_NAME] = "A NAME",
263 [TK_A_DEVLINK] = "A DEVLINK",
264 [TK_A_EVENT_TIMEOUT] = "A EVENT_TIMEOUT",
265 [TK_A_IGNORE_REMOVE] = "A IGNORE_REMOVE",
266 [TK_A_ATTR] = "A ATTR",
267 [TK_A_RUN] = "A RUN",
268 [TK_A_GOTO] = "A GOTO",
269 [TK_A_LAST_RULE] = "A LAST_RULE",
274 return token_strs[type];
277 static void dump_token(struct udev_rules *rules, struct token *token)
279 enum token_type type = token->type;
280 enum operation_type op = token->key.op;
281 enum string_glob_type glob = token->key.glob;
282 const char *value = &rules->buf[token->key.value_off];
283 const char *attr = &rules->buf[token->key.attr_off];
288 const char *tks_ptr = (char *)rules->tokens;
289 const char *tk_ptr = (char *)token;
290 unsigned int idx = (tk_ptr - tks_ptr) / sizeof(struct token);
292 dbg(rules->udev, "* RULE %s:%u, token: %u, count: %u, label: '%s', flags: 0x%02x\n",
293 &rules->buf[token->rule.filename_off], token->rule.filename_line,
294 idx, token->rule.token_count,
295 &rules->buf[token->rule.label_off],
308 case TK_M_SUBSYSTEMS:
311 case TK_M_IMPORT_FILE:
312 case TK_M_IMPORT_PROG:
313 case TK_M_IMPORT_PARENT:
321 dbg(rules->udev, "%s %s '%s'(%s)\n",
322 token_str(type), operation_str(op), value, string_glob_str(glob));
329 dbg(rules->udev, "%s %s '%s' '%s'(%s)\n",
330 token_str(type), operation_str(op), attr, value, string_glob_str(glob));
332 case TK_A_IGNORE_DEVICE:
333 case TK_A_STRING_ESCAPE_NONE:
334 case TK_A_STRING_ESCAPE_REPLACE:
336 case TK_A_IGNORE_REMOVE:
337 dbg(rules->udev, "%s\n", token_str(type));
340 dbg(rules->udev, "%s %s '%s'(%s) %#o\n",
341 token_str(type), operation_str(op), value, string_glob_str(glob), token->key.mode);
343 case TK_A_NUM_FAKE_PART:
344 dbg(rules->udev, "%s %u\n", token_str(type), token->key.num_fake_part);
346 case TK_A_DEVLINK_PRIO:
347 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.devlink_prio);
350 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.uid);
353 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.gid);
356 dbg(rules->udev, "%s %s %#o\n", token_str(type), operation_str(op), token->key.mode);
358 case TK_A_EVENT_TIMEOUT:
359 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.event_timeout);
362 dbg(rules->udev, "%s '%s' %u\n", token_str(type), value, token->key.rule_goto);
365 dbg(rules->udev, "* %s\n", token_str(type));
367 case TK_M_PARENTS_MIN:
368 case TK_M_PARENTS_MAX:
371 dbg(rules->udev, "unknown type %u\n", type);
376 static void dump_rules(struct udev_rules *rules)
380 dbg(rules->udev, "dumping %u (%zu bytes) tokens, %u (%zu bytes) strings\n",
382 rules->token_cur * sizeof(struct token),
385 for(i = 0; i < rules->token_cur; i++)
386 dump_token(rules, &rules->tokens[i]);
389 static inline const char *operation_str(enum operation_type type) { return NULL; }
390 static inline const char *token_str(enum token_type type) { return NULL; }
391 static inline void dump_token(struct udev_rules *rules, struct token *token) {}
392 static inline void dump_rules(struct udev_rules *rules) {}
395 /* we could lookup and return existing strings, or tails of strings */
396 static int add_string(struct udev_rules *rules, const char *str)
398 size_t len = strlen(str)+1;
401 /* offset 0 is always '\0' */
405 /* grow buffer if needed */
406 if (rules->buf_cur + len+1 >= rules->buf_max) {
410 /* double the buffer size */
411 add = rules->buf_max;
415 buf = realloc(rules->buf, rules->buf_max + add);
418 dbg(rules->udev, "extend buffer from %zu to %zu\n", rules->buf_max, rules->buf_max + add);
420 rules->buf_max += add;
422 off = rules->buf_cur;
423 memcpy(&rules->buf[rules->buf_cur], str, len);
424 rules->buf_cur += len;
429 static int add_token(struct udev_rules *rules, struct token *token)
432 /* grow buffer if needed */
433 if (rules->token_cur+1 >= rules->token_max) {
434 struct token *tokens;
437 /* double the buffer size */
438 add = rules->token_max;
442 tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
445 dbg(rules->udev, "extend tokens from %u to %u\n", rules->token_max, rules->token_max + add);
446 rules->tokens = tokens;
447 rules->token_max += add;
449 memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
454 static uid_t add_uid(struct udev_rules *rules, const char *owner)
460 /* lookup, if we know it already */
461 for (i = 0; i < rules->uids_cur; i++) {
462 off = rules->uids[i].name_off;
463 if (strcmp(&rules->buf[off], owner) == 0) {
464 uid = rules->uids[i].uid;
465 dbg(rules->udev, "return existing %u for '%s'\n", uid, owner);
469 uid = util_lookup_user(rules->udev, owner);
471 /* grow buffer if needed */
472 if (rules->uids_cur+1 >= rules->uids_max) {
473 struct uid_gid *uids;
476 /* double the buffer size */
477 add = rules->uids_max;
481 uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
484 dbg(rules->udev, "extend uids from %u to %u\n", rules->uids_max, rules->uids_max + add);
486 rules->uids_max += add;
488 rules->uids[rules->uids_cur].uid = uid;
489 off = add_string(rules, owner);
492 rules->uids[rules->uids_cur].name_off = off;
497 static gid_t add_gid(struct udev_rules *rules, const char *group)
503 /* lookup, if we know it already */
504 for (i = 0; i < rules->gids_cur; i++) {
505 off = rules->gids[i].name_off;
506 if (strcmp(&rules->buf[off], group) == 0) {
507 gid = rules->gids[i].gid;
508 dbg(rules->udev, "return existing %u for '%s'\n", gid, group);
512 gid = util_lookup_group(rules->udev, group);
514 /* grow buffer if needed */
515 if (rules->gids_cur+1 >= rules->gids_max) {
516 struct uid_gid *gids;
519 /* double the buffer size */
520 add = rules->gids_max;
524 gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid));
527 dbg(rules->udev, "extend gids from %u to %u\n", rules->gids_max, rules->gids_max + add);
529 rules->gids_max += add;
531 rules->gids[rules->gids_cur].gid = gid;
532 off = add_string(rules, group);
535 rules->gids[rules->gids_cur].name_off = off;
540 static int import_property_from_string(struct udev_device *dev, char *line)
542 struct udev *udev = udev_device_get_udev(dev);
549 while (isspace(key[0]))
552 /* comment or empty line */
553 if (key[0] == '#' || key[0] == '\0')
556 /* split key/value */
557 val = strchr(key, '=');
564 while (isspace(val[0]))
571 while (isspace(key[len-1]))
575 /* terminate value */
579 while (isspace(val[len-1]))
587 if (val[0] == '"' || val[0] == '\'') {
588 if (val[len-1] != val[0]) {
589 info(udev, "inconsistent quoting: '%s', skip\n", line);
596 dbg(udev, "adding '%s'='%s'\n", key, val);
598 /* handle device, renamed by external tool, returning new path */
599 if (strcmp(key, "DEVPATH") == 0) {
600 char syspath[UTIL_PATH_SIZE];
602 info(udev, "updating devpath from '%s' to '%s'\n",
603 udev_device_get_devpath(dev), val);
604 util_strlcpy(syspath, udev_get_sys_path(udev), sizeof(syspath));
605 util_strlcat(syspath, val, sizeof(syspath));
606 udev_device_set_syspath(dev, syspath);
608 struct udev_list_entry *entry;
610 entry = udev_device_add_property(dev, key, val);
612 udev_list_entry_set_flag(entry, 1);
617 static int import_file_into_properties(struct udev_device *dev, const char *filename)
620 char line[UTIL_LINE_SIZE];
622 f = fopen(filename, "r");
625 while (fgets(line, sizeof(line), f) != NULL)
626 import_property_from_string(dev, line);
631 static int import_program_into_properties(struct udev_device *dev, const char *program)
633 struct udev *udev = udev_device_get_udev(dev);
639 envp = udev_device_get_properties_envp(dev);
640 if (util_run_program(udev, program, envp, result, sizeof(result), &reslen) != 0)
644 while (line != NULL) {
647 pos = strchr(line, '\n');
652 import_property_from_string(dev, line);
658 static int import_parent_into_properties(struct udev_device *dev, const char *filter)
660 struct udev *udev = udev_device_get_udev(dev);
661 struct udev_device *dev_parent;
662 struct udev_list_entry *list_entry;
664 dev_parent = udev_device_get_parent(dev);
665 if (dev_parent == NULL)
668 dbg(udev, "found parent '%s', get the node name\n", udev_device_get_syspath(dev_parent));
669 udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
670 const char *key = udev_list_entry_get_name(list_entry);
671 const char *val = udev_list_entry_get_value(list_entry);
673 if (fnmatch(filter, key, 0) == 0) {
674 struct udev_list_entry *entry;
676 dbg(udev, "import key '%s=%s'\n", key, val);
677 entry = udev_device_add_property(dev, key, val);
679 udev_list_entry_set_flag(entry, 1);
685 #define WAIT_LOOP_PER_SECOND 50
686 static int wait_for_file(struct udev_device *dev, const char *file, int timeout)
688 struct udev *udev = udev_device_get_udev(dev);
689 char filepath[UTIL_PATH_SIZE];
690 char devicepath[UTIL_PATH_SIZE];
692 int loop = timeout * WAIT_LOOP_PER_SECOND;
694 /* a relative path is a device attribute */
695 devicepath[0] = '\0';
696 if (file[0] != '/') {
697 util_strlcpy(devicepath, udev_get_sys_path(udev), sizeof(devicepath));
698 util_strlcat(devicepath, udev_device_get_devpath(dev), sizeof(devicepath));
700 util_strlcpy(filepath, devicepath, sizeof(filepath));
701 util_strlcat(filepath, "/", sizeof(filepath));
702 util_strlcat(filepath, file, sizeof(filepath));
706 dbg(udev, "will wait %i sec for '%s'\n", timeout, file);
709 if (stat(file, &stats) == 0) {
710 info(udev, "file '%s' appeared after %i loops\n", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
713 /* make sure, the device did not disappear in the meantime */
714 if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
715 info(udev, "device disappeared while waiting for '%s'\n", file);
718 info(udev, "wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND);
719 usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND);
721 info(udev, "waiting for '%s' failed\n", file);
725 static int attr_subst_subdir(char *attr, size_t len)
730 pos = strstr(attr, "/*/");
732 char str[UTIL_PATH_SIZE];
736 util_strlcpy(str, &pos[2], sizeof(str));
741 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
744 if (dent->d_name[0] == '.')
746 util_strlcat(attr, dent->d_name, len);
747 util_strlcat(attr, str, len);
748 if (stat(attr, &stats) == 0) {
757 util_strlcat(attr, str, len);
763 static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value)
769 if (linepos == NULL && linepos[0] == '\0')
772 /* skip whitespace */
773 while (isspace(linepos[0]) || linepos[0] == ',')
777 if (linepos[0] == '\0')
783 if (linepos[0] == '\0')
785 if (isspace(linepos[0]))
787 if (linepos[0] == '=')
789 if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
790 if (linepos[1] == '=')
794 /* remember end of key */
797 /* skip whitespace after key */
798 while (isspace(linepos[0]))
800 if (linepos[0] == '\0')
803 /* get operation type */
804 if (linepos[0] == '=' && linepos[1] == '=') {
807 } else if (linepos[0] == '!' && linepos[1] == '=') {
810 } else if (linepos[0] == '+' && linepos[1] == '=') {
813 } else if (linepos[0] == '=') {
816 } else if (linepos[0] == ':' && linepos[1] == '=') {
817 *op = OP_ASSIGN_FINAL;
825 /* skip whitespace after operator */
826 while (isspace(linepos[0]))
828 if (linepos[0] == '\0')
832 if (linepos[0] == '"')
839 temp = strchr(linepos, '"');
844 dbg(udev, "%s '%s'-'%s'\n", operation_str(*op), *key, *value);
846 /* move line to next key */
851 /* extract possible KEY{attr} */
852 static char *get_key_attribute(struct udev *udev, char *str)
857 attr = strchr(str, '{');
860 pos = strchr(attr, '}');
862 err(udev, "missing closing brace for format\n");
866 dbg(udev, "attribute='%s'\n", attr);
872 static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
873 enum operation_type op,
874 const char *value, const void *data)
876 struct token *token = &rule_tmp->token[rule_tmp->token_cur];
877 const char *attr = data;
878 enum string_glob_type glob;
880 memset(token, 0x00, sizeof(struct token));
892 case TK_M_SUBSYSTEMS:
895 case TK_M_IMPORT_FILE:
896 case TK_M_IMPORT_PROG:
897 case TK_M_IMPORT_PARENT:
905 token->key.value_off = add_string(rule_tmp->rules, value);
912 token->key.value_off = add_string(rule_tmp->rules, value);
913 token->key.attr_off = add_string(rule_tmp->rules, attr);
916 token->key.value_off = add_string(rule_tmp->rules, value);
918 token->key.mode = *(mode_t *)data;
920 case TK_A_IGNORE_DEVICE:
921 case TK_A_STRING_ESCAPE_NONE:
922 case TK_A_STRING_ESCAPE_REPLACE:
923 case TK_A_IGNORE_REMOVE:
927 token->key.value_off = add_string(rule_tmp->rules, value);
928 token->key.ignore_error = *(int *)data;
930 case TK_A_NUM_FAKE_PART:
931 token->key.num_fake_part = *(int *)data;
933 case TK_A_DEVLINK_PRIO:
934 token->key.devlink_prio = *(int *)data;
937 token->key.uid = *(uid_t *)data;
940 token->key.gid = *(gid_t *)data;
943 token->key.mode = *(mode_t *)data;
945 case TK_A_EVENT_TIMEOUT:
946 token->key.event_timeout = *(int *)data;
949 case TK_M_PARENTS_MIN:
950 case TK_M_PARENTS_MAX:
954 err(rule_tmp->rules->udev, "wrong type %u\n", type);
960 if (type < TK_M_MAX) {
961 /* check if we need to split or call fnmatch() while matching rules */
965 has_split = (strchr(value, '|') != NULL);
966 has_glob = (strchr(value, '*') != NULL || strchr(value, '?') != NULL ||
967 strchr(value, '[') != NULL || strchr(value, ']') != NULL);
968 if (has_split && has_glob) {
969 glob = GL_SPLIT_GLOB;
970 } else if (has_split) {
972 } else if (has_glob) {
973 if (strcmp(value, "?*") == 0)
979 /* check if we need to substitute format strings for matching rules */
980 if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
985 token->key.type = type;
987 token->key.glob = glob;
988 rule_tmp->token_cur++;
989 if (rule_tmp->token_cur >= ARRAY_SIZE(rule_tmp->token)) {
990 err(rule_tmp->rules->udev, "temporary rule array too small\n");
996 static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp)
999 unsigned int start = 0;
1000 unsigned int end = rule_tmp->token_cur;
1002 for (i = 0; i < rule_tmp->token_cur; i++) {
1003 enum token_type next_val = TK_UNSET;
1004 unsigned int next_idx;
1007 /* find smallest value */
1008 for (j = start; j < end; j++) {
1009 if (rule_tmp->token[j].type == TK_UNSET)
1011 if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
1012 next_val = rule_tmp->token[j].type;
1017 /* add token and mark done */
1018 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
1020 rule_tmp->token[next_idx].type = TK_UNSET;
1023 if (next_idx == start)
1025 if (next_idx+1 == end)
1031 static int add_rule(struct udev_rules *rules, char *line,
1032 const char *filename, unsigned int filename_off, unsigned int lineno)
1038 struct rule_tmp rule_tmp;
1040 memset(&rule_tmp, 0x00, sizeof(struct rule_tmp));
1041 rule_tmp.rules = rules;
1042 rule_tmp.rule.type = TK_RULE;
1043 rule_tmp.rule.rule.filename_off = filename_off;
1044 rule_tmp.rule.rule.filename_line = lineno;
1050 enum operation_type op;
1052 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0)
1055 if (strcasecmp(key, "ACTION") == 0) {
1056 if (op > OP_MATCH_MAX) {
1057 err(rules->udev, "invalid ACTION operation\n");
1060 rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL);
1065 if (strcasecmp(key, "DEVPATH") == 0) {
1066 if (op > OP_MATCH_MAX) {
1067 err(rules->udev, "invalid DEVPATH operation\n");
1070 rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
1075 if (strcasecmp(key, "KERNEL") == 0) {
1076 if (op > OP_MATCH_MAX) {
1077 err(rules->udev, "invalid KERNEL operation\n");
1080 rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL);
1085 if (strcasecmp(key, "SUBSYSTEM") == 0) {
1086 if (op > OP_MATCH_MAX) {
1087 err(rules->udev, "invalid SUBSYSTEM operation\n");
1090 /* bus, class, subsystem events should all be the same */
1091 if (strcmp(value, "subsystem") == 0 ||
1092 strcmp(value, "bus") == 0 ||
1093 strcmp(value, "class") == 0) {
1094 if (strcmp(value, "bus") == 0 || strcmp(value, "class") == 0)
1095 err(rules->udev, "'%s' must be specified as 'subsystem' \n"
1096 "please fix it in %s:%u", value, filename, lineno);
1097 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
1099 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
1104 if (strcasecmp(key, "DRIVER") == 0) {
1105 if (op > OP_MATCH_MAX) {
1106 err(rules->udev, "invalid DRIVER operation\n");
1109 rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL);
1114 if (strncasecmp(key, "ATTR{", sizeof("ATTR{")-1) == 0) {
1115 attr = get_key_attribute(rules->udev, key + sizeof("ATTR")-1);
1117 err(rules->udev, "error parsing ATTR attribute\n");
1120 if (op < OP_MATCH_MAX) {
1121 rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
1123 rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr);
1129 if (strcasecmp(key, "KERNELS") == 0 ||
1130 strcasecmp(key, "ID") == 0) {
1131 if (op > OP_MATCH_MAX) {
1132 err(rules->udev, "invalid KERNELS operation\n");
1135 rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1140 if (strcasecmp(key, "SUBSYSTEMS") == 0 ||
1141 strcasecmp(key, "BUS") == 0) {
1142 if (op > OP_MATCH_MAX) {
1143 err(rules->udev, "invalid SUBSYSTEMS operation\n");
1146 rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1151 if (strcasecmp(key, "DRIVERS") == 0) {
1152 if (op > OP_MATCH_MAX) {
1153 err(rules->udev, "invalid DRIVERS operation\n");
1156 rule_add_key(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
1161 if (strncasecmp(key, "ATTRS{", sizeof("ATTRS{")-1) == 0 ||
1162 strncasecmp(key, "SYSFS{", sizeof("SYSFS{")-1) == 0) {
1163 if (op > OP_MATCH_MAX) {
1164 err(rules->udev, "invalid ATTRS operation\n");
1167 attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
1169 err(rules->udev, "error parsing ATTRS attribute\n");
1172 if (strncmp(attr, "device/", 7) == 0)
1173 err(rules->udev, "the 'device' link may not be available in a future kernel, "
1174 "please fix it in %s:%u", filename, lineno);
1175 else if (strstr(attr, "../") != NULL)
1176 err(rules->udev, "do not reference parent sysfs directories directly, "
1177 "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
1178 rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1183 if (strncasecmp(key, "ENV{", sizeof("ENV{")-1) == 0) {
1184 attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1);
1186 err(rules->udev, "error parsing ENV attribute\n");
1189 if (strncmp(attr, "PHYSDEV", 7) == 0)
1191 if (op < OP_MATCH_MAX) {
1192 if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
1195 if (rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
1202 if (strcasecmp(key, "PROGRAM") == 0) {
1203 rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
1208 if (strcasecmp(key, "RESULT") == 0) {
1209 if (op > OP_MATCH_MAX) {
1210 err(rules->udev, "invalid RESULT operation\n");
1213 rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL);
1218 if (strncasecmp(key, "IMPORT", sizeof("IMPORT")-1) == 0) {
1219 attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1);
1220 if (attr != NULL && strstr(attr, "program")) {
1221 dbg(rules->udev, "IMPORT will be executed\n");
1222 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1224 } else if (attr != NULL && strstr(attr, "file")) {
1225 dbg(rules->udev, "IMPORT will be included as file\n");
1226 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1228 } else if (attr != NULL && strstr(attr, "parent")) {
1229 dbg(rules->udev, "IMPORT will include the parent values\n");
1230 rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
1233 /* figure it out if it is executable */
1234 char file[UTIL_PATH_SIZE];
1236 struct stat statbuf;
1238 util_strlcpy(file, value, sizeof(file));
1239 pos = strchr(file, ' ');
1243 /* allow programs in /lib/udev called without the path */
1244 if (strchr(file, '/') == NULL) {
1245 util_strlcpy(file, UDEV_PREFIX "/lib/udev/", sizeof(file));
1246 util_strlcat(file, value, sizeof(file));
1247 pos = strchr(file, ' ');
1252 dbg(rules->udev, "IMPORT auto mode for '%s'\n", file);
1253 if (!lstat(file, &statbuf) && (statbuf.st_mode & S_IXUSR)) {
1254 dbg(rules->udev, "IMPORT will be executed (autotype)\n");
1255 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1258 dbg(rules->udev, "IMPORT will be included as file (autotype)\n");
1259 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1266 if (strncasecmp(key, "TEST", sizeof("TEST")-1) == 0) {
1269 if (op > OP_MATCH_MAX) {
1270 err(rules->udev, "invalid TEST operation\n");
1273 attr = get_key_attribute(rules->udev, key + sizeof("TEST")-1);
1275 mode = strtol(attr, NULL, 8);
1276 rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode);
1278 rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL);
1284 if (strncasecmp(key, "RUN", sizeof("RUN")-1) == 0) {
1287 attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1);
1288 if (attr != NULL && strstr(attr, "ignore_error"))
1290 rule_add_key(&rule_tmp, TK_A_RUN, op, value, &flag);
1295 if (strcasecmp(key, "WAIT_FOR") == 0 || strcasecmp(key, "WAIT_FOR_SYSFS") == 0) {
1296 rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1301 if (strcasecmp(key, "LABEL") == 0) {
1302 rule_tmp.rule.rule.label_off = add_string(rules, value);
1307 if (strcasecmp(key, "GOTO") == 0) {
1308 rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1313 if (strncasecmp(key, "NAME", sizeof("NAME")-1) == 0) {
1314 if (op < OP_MATCH_MAX) {
1315 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
1317 if (value[0] == '\0')
1318 dbg(rules->udev, "name empty, node creation suppressed\n");
1319 rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL);
1320 attr = get_key_attribute(rules->udev, key + sizeof("NAME")-1);
1322 if (strstr(attr, "all_partitions") != NULL) {
1323 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1325 dbg(rules->udev, "creation of partition nodes requested\n");
1326 rule_add_key(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1328 if (strstr(attr, "ignore_remove") != NULL) {
1329 dbg(rules->udev, "remove event should be ignored\n");
1330 rule_add_key(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1334 rule_tmp.rule.rule.flags = 1;
1338 if (strcasecmp(key, "SYMLINK") == 0) {
1339 if (op < OP_MATCH_MAX)
1340 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
1342 rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, NULL);
1343 rule_tmp.rule.rule.flags = 1;
1348 if (strcasecmp(key, "OWNER") == 0) {
1352 uid = strtoul(value, &endptr, 10);
1353 if (endptr[0] == '\0') {
1354 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1355 } else if (rules->resolve_names && strchr("$%", value[0]) == NULL) {
1356 uid = add_uid(rules, value);
1357 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1359 rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
1361 rule_tmp.rule.rule.flags = 1;
1366 if (strcasecmp(key, "GROUP") == 0) {
1370 gid = strtoul(value, &endptr, 10);
1371 if (endptr[0] == '\0') {
1372 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1373 } else if (rules->resolve_names && strchr("$%", value[0]) == NULL) {
1374 gid = add_gid(rules, value);
1375 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1377 rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
1379 rule_tmp.rule.rule.flags = 1;
1384 if (strcasecmp(key, "MODE") == 0) {
1388 mode = strtol(value, &endptr, 8);
1389 if (endptr[0] == '\0')
1390 rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1392 rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
1393 rule_tmp.rule.rule.flags = 1;
1398 if (strcasecmp(key, "OPTIONS") == 0) {
1401 if (strstr(value, "last_rule") != NULL) {
1402 dbg(rules->udev, "last rule to be applied\n");
1403 rule_add_key(&rule_tmp, TK_A_LAST_RULE, 0, NULL, NULL);
1405 if (strstr(value, "ignore_device") != NULL) {
1406 dbg(rules->udev, "device should be ignored\n");
1407 rule_add_key(&rule_tmp, TK_A_IGNORE_DEVICE, 0, NULL, NULL);
1409 if (strstr(value, "ignore_remove") != NULL) {
1410 dbg(rules->udev, "remove event should be ignored\n");
1411 rule_add_key(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1413 pos = strstr(value, "link_priority=");
1415 int prio = atoi(&pos[strlen("link_priority=")]);
1417 rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, 0, NULL, &prio);
1418 dbg(rules->udev, "link priority=%i\n", prio);
1420 pos = strstr(value, "event_timeout=");
1422 int tout = atoi(&pos[strlen("event_timeout=")]);
1424 rule_add_key(&rule_tmp, TK_A_EVENT_TIMEOUT, 0, NULL, &tout);
1425 dbg(rules->udev, "event timout=%i\n", tout);
1427 pos = strstr(value, "string_escape=");
1429 pos = &pos[strlen("string_escape=")];
1430 if (strncmp(pos, "none", strlen("none")) == 0)
1431 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, 0, NULL, NULL);
1432 else if (strncmp(pos, "replace", strlen("replace")) == 0)
1433 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, 0, NULL, NULL);
1435 if (strstr(value, "all_partitions") != NULL) {
1436 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1438 rule_add_key(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1439 dbg(rules->udev, "creation of partition nodes requested\n");
1444 err(rules->udev, "unknown key '%s' in %s:%u\n", key, filename, lineno);
1448 err(rules->udev, "PHYSDEV* values are deprecated and not available on recent kernels, \n"
1449 "please fix it in %s:%u", filename, lineno);
1451 /* skip line if not any valid key was found */
1455 /* add rule token */
1456 rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur;
1457 if (add_token(rules, &rule_tmp.rule) != 0)
1460 /* add tokens to list, sorted by type */
1461 if (sort_token(rules, &rule_tmp) != 0)
1466 err(rules->udev, "invalid rule '%s:%u'\n", filename, lineno);
1470 static int parse_file(struct udev_rules *rules, const char *filename, unsigned short filename_off)
1473 unsigned int first_token;
1474 char line[UTIL_LINE_SIZE];
1478 info(rules->udev, "reading '%s' as rules file\n", filename);
1480 f = fopen(filename, "r");
1484 first_token = rules->token_cur;
1486 while(fgets(line, sizeof(line), f) != NULL) {
1490 /* skip whitespace */
1493 while (isspace(key[0]))
1504 /* continue reading if backslash+newline is found */
1505 while (line[len-2] == '\\') {
1506 if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1512 if (len+1 >= sizeof(line)) {
1513 err(rules->udev, "line too long '%s':%u, ignored\n", filename, line_nr);
1516 add_rule(rules, key, filename, filename_off, line_nr);
1520 /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1521 for (i = first_token+1; i < rules->token_cur; i++) {
1522 if (rules->tokens[i].type == TK_A_GOTO) {
1523 char *label = &rules->buf[rules->tokens[i].key.value_off];
1526 for (j = i+1; j < rules->token_cur; j++) {
1527 if (rules->tokens[j].type != TK_RULE)
1529 if (rules->tokens[j].rule.label_off == 0)
1531 if (strcmp(label, &rules->buf[rules->tokens[j].rule.label_off]) != 0)
1533 rules->tokens[i].key.rule_goto = j;
1535 if (rules->tokens[i].key.rule_goto == 0)
1536 err(rules->udev, "GOTO '%s' has no matching label in: '%s'\n", label, filename);
1542 static int add_matching_files(struct udev *udev, struct udev_list_node *file_list, const char *dirname, const char *suffix)
1545 char filename[UTIL_PATH_SIZE];
1547 dbg(udev, "open directory '%s'\n", dirname);
1548 dir = opendir(dirname);
1550 err(udev, "unable to open '%s': %m\n", dirname);
1555 struct dirent *dent;
1557 dent = readdir(dir);
1558 if (dent == NULL || dent->d_name[0] == '\0')
1561 if (dent->d_name[0] == '.')
1564 /* look for file matching with specified suffix */
1565 if (suffix != NULL) {
1568 ext = strrchr(dent->d_name, '.');
1571 if (strcmp(ext, suffix) != 0)
1574 dbg(udev, "put file '%s/%s' into list\n", dirname, dent->d_name);
1576 snprintf(filename, sizeof(filename), "%s/%s", dirname, dent->d_name);
1577 filename[sizeof(filename)-1] = '\0';
1578 udev_list_entry_add(udev, file_list, filename, NULL, 1, 1);
1585 struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
1587 struct udev_rules *rules;
1588 struct stat statbuf;
1589 struct udev_list_node file_list;
1590 struct udev_list_entry *file_loop, *file_tmp;
1591 struct token end_token;
1593 rules = malloc(sizeof(struct udev_rules));
1596 memset(rules, 0x00, sizeof(struct udev_rules));
1598 rules->resolve_names = resolve_names;
1599 udev_list_init(&file_list);
1601 /* init token array and string buffer */
1602 rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
1603 if (rules->tokens == NULL)
1605 rules->token_max = PREALLOC_TOKEN;
1606 rules->buf = malloc(PREALLOC_STRBUF);
1607 if (rules->buf == NULL)
1609 rules->buf_max = PREALLOC_STRBUF;
1610 /* offset 0 is always '\0' */
1611 rules->buf[0] = '\0';
1613 dbg(udev, "prealloc %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1614 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1616 if (udev_get_rules_path(udev) != NULL) {
1617 /* custom rules location for testing */
1618 add_matching_files(udev, &file_list, udev_get_rules_path(udev), ".rules");
1620 char filename[PATH_MAX];
1621 struct udev_list_node sort_list;
1622 struct udev_list_entry *sort_loop, *sort_tmp;
1624 /* read user/custom rules */
1625 add_matching_files(udev, &file_list, SYSCONFDIR "/udev/rules.d", ".rules");
1627 /* read dynamic/temporary rules */
1628 util_strlcpy(filename, udev_get_dev_path(udev), sizeof(filename));
1629 util_strlcat(filename, "/.udev/rules.d", sizeof(filename));
1630 if (stat(filename, &statbuf) != 0) {
1631 util_create_path(udev, filename);
1632 udev_selinux_setfscreatecon(udev, filename, S_IFDIR|0755);
1633 mkdir(filename, 0755);
1634 udev_selinux_resetfscreatecon(udev);
1636 udev_list_init(&sort_list);
1637 add_matching_files(udev, &sort_list, filename, ".rules");
1639 /* read default rules */
1640 add_matching_files(udev, &sort_list, UDEV_PREFIX "/lib/udev/rules.d", ".rules");
1642 /* sort all rules files by basename into list of files */
1643 udev_list_entry_foreach_safe(sort_loop, sort_tmp, udev_list_get_entry(&sort_list)) {
1644 const char *sort_name = udev_list_entry_get_name(sort_loop);
1645 const char *sort_base = strrchr(sort_name, '/');
1647 if (sort_base == NULL)
1649 /* sort entry into existing list */
1650 udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1651 const char *file_name = udev_list_entry_get_name(file_loop);
1652 const char *file_base = strrchr(file_name, '/');
1654 if (file_base == NULL)
1656 if (strcmp(file_base, sort_base) == 0) {
1657 info(udev, "rule file basename '%s' already added, ignoring '%s'\n",
1658 file_name, sort_name);
1659 udev_list_entry_delete(sort_loop);
1663 if (strcmp(file_base, sort_base) > 0) {
1664 /* found later file, insert before */
1665 udev_list_entry_remove(sort_loop);
1666 udev_list_entry_insert_before(sort_loop, file_loop);
1671 /* current file already handled */
1672 if (sort_loop == NULL)
1674 /* no later file, append to end of list */
1675 udev_list_entry_remove(sort_loop);
1676 udev_list_entry_append(sort_loop, &file_list);
1680 /* add all filenames to the string buffer */
1681 udev_list_entry_foreach(file_loop, udev_list_get_entry(&file_list)) {
1682 const char *filename = udev_list_entry_get_name(file_loop);
1683 unsigned int filename_off;
1685 filename_off = add_string(rules, filename);
1686 /* the offset in the rule is limited to unsigned short */
1687 if (filename_off < USHRT_MAX)
1688 udev_list_entry_set_flag(file_loop, filename_off);
1691 /* parse list of files */
1692 udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1693 const char *filename = udev_list_entry_get_name(file_loop);
1694 unsigned int filename_off = udev_list_entry_get_flag(file_loop);
1696 if (stat(filename, &statbuf) == 0 && statbuf.st_size > 0)
1697 parse_file(rules, filename, filename_off);
1699 info(udev, "can not read '%s'\n", filename);
1700 udev_list_entry_delete(file_loop);
1703 memset(&end_token, 0x00, sizeof(struct token));
1704 end_token.type = TK_END;
1705 add_token(rules, &end_token);
1707 /* shrink allocated token and string buffer */
1708 if (rules->token_cur < rules->token_max) {
1709 struct token *tokens;
1711 tokens = realloc(rules->tokens, rules->token_cur * sizeof(struct token));
1712 if (tokens != NULL || rules->token_cur == 0) {
1713 rules->tokens = tokens;
1714 rules->token_max = rules->token_cur;
1717 if (rules->buf_cur < rules->buf_max) {
1720 buf = realloc(rules->buf, rules->buf_cur);
1721 if (buf != NULL || rules->buf_cur == 0) {
1723 rules->buf_max = rules->buf_cur;
1726 info(udev, "shrunk to %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1727 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1729 /* cleanup uid/gid cache */
1732 rules->uids_cur = 0;
1733 rules->uids_max = 0;
1736 rules->gids_cur = 0;
1737 rules->gids_max = 0;
1743 void udev_rules_unref(struct udev_rules *rules)
1747 free(rules->tokens);
1754 static int match_key(struct udev_rules *rules, struct token *token, const char *val)
1756 char *key_value = &rules->buf[token->key.value_off];
1763 switch (token->key.glob) {
1765 match = (strcmp(key_value, val) == 0);
1768 match = (fnmatch(key_value, val, 0) == 0);
1775 split = &rules->buf[token->key.value_off];
1780 next = strchr(split, '|');
1782 size_t matchlen = (size_t)(next - split);
1784 match = (matchlen == len && strncmp(split, val, matchlen) == 0);
1788 match = (strcmp(split, val) == 0);
1797 char value[UTIL_PATH_SIZE];
1799 util_strlcpy(value, &rules->buf[token->key.value_off], sizeof(value));
1801 while (key_value != NULL) {
1802 pos = strchr(key_value, '|');
1807 dbg(rules->udev, "match %s '%s' <-> '%s'\n", token_str(token->type), key_value, val);
1808 match = (fnmatch(key_value, val, 0) == 0);
1816 match = (val[0] != '\0');
1823 if (match && (token->key.op == OP_MATCH)) {
1824 dbg(rules->udev, "%s is true (matching value)\n", token_str(token->type));
1827 if (!match && (token->key.op == OP_NOMATCH)) {
1828 dbg(rules->udev, "%s is true (non-matching value)\n", token_str(token->type));
1831 dbg(rules->udev, "%s is not true\n", token_str(token->type));
1835 static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur)
1837 const char *key_name = &rules->buf[cur->key.attr_off];
1838 const char *key_value = &rules->buf[cur->key.value_off];
1839 char value[UTIL_NAME_SIZE];
1843 if (key_name[0] == '[') {
1844 char attr[UTIL_PATH_SIZE];
1846 util_strlcpy(attr, key_name, sizeof(attr));
1847 util_resolve_subsys_kernel(event->udev, attr, value, sizeof(value), 1);
1849 if (value[0] == '\0') {
1852 val = udev_device_get_sysattr_value(dev, key_name);
1855 util_strlcpy(value, val, sizeof(value));
1858 /* strip trailing whitespace of value, if not asked to match for it */
1859 len = strlen(key_value);
1860 if (len > 0 && !isspace(key_value[len-1])) {
1861 len = strlen(value);
1862 while (len > 0 && isspace(value[--len]))
1864 dbg(rules->udev, "removed trailing whitespace from '%s'\n", value);
1866 return match_key(rules, cur, value);
1875 int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event)
1879 enum escape_type esc = ESCAPE_UNSET;
1882 if (rules->tokens == NULL)
1885 can_set_name = ((strcmp(udev_device_get_action(event->dev), "add") == 0 ||
1886 strcmp(udev_device_get_action(event->dev), "change") == 0) &&
1887 (major(udev_device_get_devnum(event->dev)) > 0 ||
1888 strcmp(udev_device_get_subsystem(event->dev), "net") == 0));
1890 /* loop through token list, match, run actions or forward to next rule */
1891 cur = &rules->tokens[0];
1894 dump_token(rules, cur);
1895 switch (cur->type) {
1899 /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
1900 if (!can_set_name && rule->rule.flags)
1905 if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
1909 if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
1913 if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
1918 size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
1919 struct udev_list_entry *list_entry;
1922 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
1923 const char *devlink;
1925 devlink = &udev_list_entry_get_name(list_entry)[devlen];
1926 if (match_key(rules, cur, devlink) == 0) {
1936 if (match_key(rules, cur, event->name) != 0)
1941 struct udev_list_entry *list_entry;
1942 const char *key_name = &rules->buf[cur->key.attr_off];
1945 list_entry = udev_device_get_properties_list_entry(event->dev);
1946 list_entry = udev_list_entry_get_by_name(list_entry, key_name);
1947 value = udev_list_entry_get_value(list_entry);
1948 if (value == NULL) {
1949 dbg(event->udev, "ENV{%s} is not set, treat as empty\n", key_name);
1952 if (match_key(rules, cur, value))
1956 case TK_M_SUBSYSTEM:
1957 if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
1961 if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
1966 char filename[UTIL_PATH_SIZE];
1969 util_strlcpy(filename, &rules->buf[cur->key.value_off], sizeof(filename));
1970 udev_event_apply_format(event, filename, sizeof(filename));
1971 found = (wait_for_file(event->dev, filename, 10) == 0);
1972 if (!found && (cur->key.op != OP_NOMATCH))
1977 if (match_attr(rules, event->dev, event, cur) != 0)
1981 case TK_M_SUBSYSTEMS:
1987 /* get whole sequence of parent matches */
1989 while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX)
1992 /* loop over parents */
1993 event->dev_parent = event->dev;
1997 dbg(event->udev, "parent: '%s'\n", udev_device_get_syspath(event->dev_parent));
1998 /* loop over sequence of parent match keys */
1999 for (key = cur; key < next; key++ ) {
2000 dump_token(rules, key);
2003 if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
2006 case TK_M_SUBSYSTEMS:
2007 if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
2011 if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
2015 if (match_attr(rules, event->dev_parent, event, key) != 0)
2021 dbg(event->udev, "parent key matched\n");
2023 dbg(event->udev, "all parent keys matched\n");
2024 /* all keys matched */
2028 event->dev_parent = udev_device_get_parent(event->dev_parent);
2029 if (event->dev_parent == NULL)
2032 /* move behind our sequence of parent match keys */
2038 char filename[UTIL_PATH_SIZE];
2039 struct stat statbuf;
2042 util_strlcpy(filename, &rules->buf[cur->key.value_off], sizeof(filename));
2043 udev_event_apply_format(event, filename, sizeof(filename));
2044 if (util_resolve_subsys_kernel(event->udev, NULL, filename, sizeof(filename), 0) != 0)
2045 if (filename[0] != '/') {
2046 char tmp[UTIL_PATH_SIZE];
2048 util_strlcpy(tmp, udev_device_get_syspath(event->dev), sizeof(tmp));
2049 util_strlcat(tmp, "/", sizeof(tmp));
2050 util_strlcat(tmp, filename, sizeof(tmp));
2051 util_strlcpy(filename, tmp, sizeof(filename));
2054 attr_subst_subdir(filename, sizeof(filename));
2056 match = (stat(filename, &statbuf) == 0);
2057 dbg(event->udev, "'%s' %s", filename, match ? "exists\n" : "does not exist\n");
2058 if (match && cur->key.mode > 0) {
2059 match = ((statbuf.st_mode & cur->key.mode) > 0);
2060 dbg(event->udev, "'%s' has mode=%#o and %s %#o\n", filename, statbuf.st_mode,
2061 match ? "matches" : "does not match", cur->key.mode);
2063 if (match && cur->key.op == OP_NOMATCH)
2065 if (!match && cur->key.op == OP_MATCH)
2071 char program[UTIL_PATH_SIZE];
2073 char result[UTIL_PATH_SIZE];
2075 free(event->program_result);
2076 event->program_result = NULL;
2077 util_strlcpy(program, &rules->buf[cur->key.value_off], sizeof(program));
2078 udev_event_apply_format(event, program, sizeof(program));
2079 envp = udev_device_get_properties_envp(event->dev);
2080 info(event->udev, "PROGRAM '%s' %s:%u\n",
2082 &rules->buf[rule->rule.filename_off],
2083 rule->rule.filename_line);
2084 if (util_run_program(event->udev, program, envp, result, sizeof(result), NULL) != 0) {
2085 if (cur->key.op != OP_NOMATCH)
2090 util_remove_trailing_chars(result, '\n');
2091 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2092 count = udev_util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
2094 info(event->udev, "%i character(s) replaced\n" , count);
2096 event->program_result = strdup(result);
2097 dbg(event->udev, "storing result '%s'\n", event->program_result);
2098 if (cur->key.op == OP_NOMATCH)
2103 case TK_M_IMPORT_FILE:
2105 char import[UTIL_PATH_SIZE];
2107 util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));
2108 udev_event_apply_format(event, import, sizeof(import));
2109 if (import_file_into_properties(event->dev, import) != 0)
2110 if (cur->key.op != OP_NOMATCH)
2114 case TK_M_IMPORT_PROG:
2116 char import[UTIL_PATH_SIZE];
2118 util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));
2119 udev_event_apply_format(event, import, sizeof(import));
2120 info(event->udev, "IMPORT '%s' %s:%u\n",
2122 &rules->buf[rule->rule.filename_off],
2123 rule->rule.filename_line);
2124 if (import_program_into_properties(event->dev, import) != 0)
2125 if (cur->key.op != OP_NOMATCH)
2129 case TK_M_IMPORT_PARENT:
2131 char import[UTIL_PATH_SIZE];
2133 util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));
2134 udev_event_apply_format(event, import, sizeof(import));
2135 if (import_parent_into_properties(event->dev, import) != 0)
2136 if (cur->key.op != OP_NOMATCH)
2141 if (match_key(rules, cur, event->program_result) != 0)
2145 case TK_A_IGNORE_DEVICE:
2146 event->ignore_device = 1;
2149 case TK_A_STRING_ESCAPE_NONE:
2152 case TK_A_STRING_ESCAPE_REPLACE:
2153 esc = ESCAPE_REPLACE;
2155 case TK_A_NUM_FAKE_PART:
2156 if (strcmp(udev_device_get_subsystem(event->dev), "block") != 0)
2158 if (udev_device_get_sysnum(event->dev) != NULL)
2160 udev_device_set_num_fake_partitions(event->dev, cur->key.num_fake_part);
2162 case TK_A_DEVLINK_PRIO:
2163 udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
2167 char owner[UTIL_NAME_SIZE];
2169 if (event->owner_final)
2171 if (cur->key.op == OP_ASSIGN_FINAL)
2172 event->owner_final = 1;
2173 util_strlcpy(owner, &rules->buf[cur->key.value_off], sizeof(owner));
2174 udev_event_apply_format(event, owner, sizeof(owner));
2175 event->uid = util_lookup_user(event->udev, owner);
2176 info(event->udev, "OWNER %u %s:%u\n",
2178 &rules->buf[rule->rule.filename_off],
2179 rule->rule.filename_line);
2184 char group[UTIL_NAME_SIZE];
2186 if (event->group_final)
2188 if (cur->key.op == OP_ASSIGN_FINAL)
2189 event->group_final = 1;
2190 util_strlcpy(group, &rules->buf[cur->key.value_off], sizeof(group));
2191 udev_event_apply_format(event, group, sizeof(group));
2192 event->gid = util_lookup_group(event->udev, group);
2193 info(event->udev, "GROUP %u %s:%u\n",
2195 &rules->buf[rule->rule.filename_off],
2196 rule->rule.filename_line);
2201 char mode[UTIL_NAME_SIZE];
2204 if (event->mode_final)
2206 if (cur->key.op == OP_ASSIGN_FINAL)
2207 event->mode_final = 1;
2208 util_strlcpy(mode, &rules->buf[cur->key.value_off], sizeof(mode));
2209 udev_event_apply_format(event, mode, sizeof(mode));
2210 event->mode = strtol(mode, &endptr, 8);
2211 if (endptr[0] != '\0') {
2212 err(event->udev, "invalide mode '%s' set default mode 0660\n", mode);
2215 info(event->udev, "MODE %#o %s:%u\n",
2217 &rules->buf[rule->rule.filename_off],
2218 rule->rule.filename_line);
2222 if (event->owner_final)
2224 if (cur->key.op == OP_ASSIGN_FINAL)
2225 event->owner_final = 1;
2226 event->uid = cur->key.uid;
2227 info(event->udev, "OWNER %u %s:%u\n",
2229 &rules->buf[rule->rule.filename_off],
2230 rule->rule.filename_line);
2233 if (event->group_final)
2235 if (cur->key.op == OP_ASSIGN_FINAL)
2236 event->group_final = 1;
2237 event->gid = cur->key.gid;
2238 info(event->udev, "GROUP %u %s:%u\n",
2240 &rules->buf[rule->rule.filename_off],
2241 rule->rule.filename_line);
2244 if (event->mode_final)
2246 if (cur->key.op == OP_ASSIGN_FINAL)
2247 event->mode_final = 1;
2248 event->mode = cur->key.mode;
2249 info(event->udev, "MODE %#o %s:%u\n",
2251 &rules->buf[rule->rule.filename_off],
2252 rule->rule.filename_line);
2256 const char *name = &rules->buf[cur->key.attr_off];
2257 char *value = &rules->buf[cur->key.value_off];
2259 if (value[0] != '\0') {
2260 char temp_value[UTIL_NAME_SIZE];
2261 struct udev_list_entry *entry;
2263 util_strlcpy(temp_value, value, sizeof(temp_value));
2264 udev_event_apply_format(event, temp_value, sizeof(temp_value));
2265 entry = udev_device_add_property(event->dev, name, temp_value);
2267 udev_list_entry_set_flag(entry, 1);
2269 udev_device_add_property(event->dev, name, NULL);
2275 const char *name = &rules->buf[cur->key.value_off];
2276 char name_str[UTIL_PATH_SIZE];
2279 if (event->name_final)
2281 if (cur->key.op == OP_ASSIGN_FINAL)
2282 event->name_final = 1;
2283 if (name[0] == '\0') {
2288 util_strlcpy(name_str, name, sizeof(name_str));
2289 udev_event_apply_format(event, name_str, sizeof(name_str));
2290 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2291 count = udev_util_replace_chars(name_str, "/");
2293 info(event->udev, "%i character(s) replaced\n", count);
2295 event->name = strdup(name_str);
2296 info(event->udev, "NAME '%s' %s:%u\n",
2298 &rules->buf[rule->rule.filename_off],
2299 rule->rule.filename_line);
2305 char temp[UTIL_PATH_SIZE];
2306 char filename[UTIL_PATH_SIZE];
2310 if (event->devlink_final)
2312 if (major(udev_device_get_devnum(event->dev)) == 0)
2314 if (cur->key.op == OP_ASSIGN_FINAL)
2315 event->devlink_final = 1;
2316 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2317 udev_device_cleanup_devlinks_list(event->dev);
2319 /* allow multiple symlinks separated by spaces */
2320 util_strlcpy(temp, &rules->buf[cur->key.value_off], sizeof(temp));
2321 udev_event_apply_format(event, temp, sizeof(temp));
2322 if (esc == ESCAPE_UNSET)
2323 count = udev_util_replace_chars(temp, "/ ");
2324 else if (esc == ESCAPE_REPLACE)
2325 count = udev_util_replace_chars(temp, "/");
2327 info(event->udev, "%i character(s) replaced\n" , count);
2328 dbg(event->udev, "rule applied, added symlink(s) '%s'\n", temp);
2330 while (isspace(pos[0]))
2332 next = strchr(pos, ' ');
2335 info(event->udev, "LINK '%s' %s:%u\n",
2337 &rules->buf[rule->rule.filename_off],
2338 rule->rule.filename_line);
2339 util_strlcpy(filename, udev_get_dev_path(event->udev), sizeof(filename));
2340 util_strlcat(filename, "/", sizeof(filename));
2341 util_strlcat(filename, pos, sizeof(filename));
2342 udev_device_add_devlink(event->dev, filename);
2343 while (isspace(next[1]))
2346 next = strchr(pos, ' ');
2348 if (pos[0] != '\0') {
2349 info(event->udev, "LINK '%s' %s:%u\n",
2351 &rules->buf[rule->rule.filename_off],
2352 rule->rule.filename_line);
2353 util_strlcpy(filename, udev_get_dev_path(event->udev), sizeof(filename));
2354 util_strlcat(filename, "/", sizeof(filename));
2355 util_strlcat(filename, pos, sizeof(filename));
2356 udev_device_add_devlink(event->dev, filename);
2360 case TK_A_EVENT_TIMEOUT:
2361 udev_device_set_event_timeout(event->dev, cur->key.event_timeout);
2363 case TK_A_IGNORE_REMOVE:
2364 udev_device_set_ignore_remove(event->dev, 1);
2368 const char *key_name = &rules->buf[cur->key.attr_off];
2369 char attr[UTIL_PATH_SIZE];
2370 char value[UTIL_NAME_SIZE];
2373 util_strlcpy(attr, key_name, sizeof(attr));
2374 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0) {
2375 util_strlcpy(attr, udev_device_get_syspath(event->dev), sizeof(attr));
2376 util_strlcat(attr, "/", sizeof(attr));
2377 util_strlcat(attr, key_name, sizeof(attr));
2380 attr_subst_subdir(attr, sizeof(attr));
2382 util_strlcpy(value, &rules->buf[cur->key.value_off], sizeof(value));
2383 udev_event_apply_format(event, value, sizeof(value));
2384 info(event->udev, "ATTR '%s' writing '%s' %s:%u\n", attr, value,
2385 &rules->buf[rule->rule.filename_off],
2386 rule->rule.filename_line);
2387 f = fopen(attr, "w");
2390 if (fprintf(f, "%s", value) <= 0)
2391 err(event->udev, "error writing ATTR{%s}: %m\n", attr);
2394 err(event->udev, "error opening ATTR{%s} for writing: %m\n", attr);
2400 struct udev_list_entry *list_entry;
2402 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2403 udev_list_cleanup_entries(event->udev, &event->run_list);
2404 info(event->udev, "RUN '%s' %s:%u\n",
2405 &rules->buf[cur->key.value_off],
2406 &rules->buf[rule->rule.filename_off],
2407 rule->rule.filename_line);
2408 list_entry = udev_list_entry_add(event->udev, &event->run_list,
2409 &rules->buf[cur->key.value_off], NULL, 1, 0);
2410 if (cur->key.ignore_error)
2411 udev_list_entry_set_flag(list_entry, 1);
2415 cur = &rules->tokens[cur->key.rule_goto];
2417 case TK_A_LAST_RULE:
2421 case TK_M_PARENTS_MIN:
2422 case TK_M_PARENTS_MAX:
2425 err(rules->udev, "wrong type %u\n", cur->type);
2432 /* fast-forward to next rule */
2433 cur = rule + rule->rule.token_count;
2434 dbg(rules->udev, "forward to rule: %u\n",
2435 (unsigned int) (cur - rules->tokens));