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/>.
32 #define PREALLOC_TOKEN 2048
33 #define PREALLOC_STRBUF 32 * 1024
34 #define PREALLOC_TRIE 256
37 unsigned int name_off;
45 unsigned int next_idx;
46 unsigned int node_idx;
51 unsigned int child_idx;
52 unsigned int last_child_idx;
53 unsigned int value_off;
54 unsigned short value_len;
61 /* every key in the rules file becomes a token */
63 unsigned int token_cur;
64 unsigned int token_max;
66 /* all key strings are copied to a single string buffer */
70 unsigned int buf_count;
72 /* during rule parsing, strings are indexed to find duplicates */
73 unsigned int *trie_root;
74 struct trie_node *trie_nodes;
75 unsigned int trie_nodes_cur;
76 unsigned int trie_nodes_max;
77 struct trie_child *trie_childs;
78 unsigned int trie_childs_cur;
79 unsigned int trie_childs_max;
81 /* during rule parsing, uid/gid lookup results are cached */
83 unsigned int uids_cur;
84 unsigned int uids_max;
86 unsigned int gids_cur;
87 unsigned int gids_max;
90 /* KEY=="", KEY!="", KEY+="", KEY="", KEY:="" */
103 enum string_glob_type {
105 GL_PLAIN, /* no special chars */
106 GL_GLOB, /* shell globs ?,*,[] */
107 GL_SPLIT, /* multi-value A|B */
108 GL_SPLIT_GLOB, /* multi-value with glob A*|B* */
109 GL_SOMETHING, /* commonly used "?*" */
113 /* tokens of a rule are sorted/handled in this order */
118 TK_M_ACTION, /* val */
119 TK_M_DEVPATH, /* val */
120 TK_M_KERNEL, /* val */
121 TK_M_DEVLINK, /* val */
123 TK_M_ENV, /* val, attr */
124 TK_M_SUBSYSTEM, /* val */
125 TK_M_DRIVER, /* val */
126 TK_M_WAITFOR, /* val */
127 TK_M_ATTR, /* val, attr */
130 TK_M_KERNELS, /* val */
131 TK_M_SUBSYSTEMS, /* val */
132 TK_M_DRIVERS, /* val */
133 TK_M_ATTRS, /* val, attr */
136 TK_M_TEST, /* val, mode_t */
137 TK_M_PROGRAM, /* val */
138 TK_M_IMPORT_FILE, /* val */
139 TK_M_IMPORT_PROG, /* val */
140 TK_M_IMPORT_PARENT, /* val */
141 TK_M_RESULT, /* val */
145 TK_A_STRING_ESCAPE_NONE,
146 TK_A_STRING_ESCAPE_REPLACE,
147 TK_A_NUM_FAKE_PART, /* int */
148 TK_A_DEVLINK_PRIO, /* int */
149 TK_A_OWNER, /* val */
150 TK_A_GROUP, /* val */
152 TK_A_OWNER_ID, /* uid_t */
153 TK_A_GROUP_ID, /* gid_t */
154 TK_A_MODE_ID, /* mode_t */
155 TK_A_ENV, /* val, attr */
157 TK_A_DEVLINK, /* val */
158 TK_A_EVENT_TIMEOUT, /* int */
160 TK_A_ATTR, /* val, attr */
161 TK_A_RUN, /* val, bool */
162 TK_A_GOTO, /* size_t */
168 /* we try to pack stuff in a way that we take only 12 bytes per token */
171 unsigned char type; /* same as in rule and key */
175 unsigned short token_count;
176 unsigned int label_off;
177 unsigned short filename_off;
178 unsigned short filename_line;
185 unsigned int value_off;
187 unsigned int attr_off;
190 unsigned int rule_goto;
204 struct udev_rules *rules;
206 struct token token[MAX_TK];
207 unsigned int token_cur;
211 static const char *operation_str(enum operation_type type)
213 static const char *operation_strs[] = {
214 [OP_UNSET] = "UNSET",
215 [OP_MATCH] = "match",
216 [OP_NOMATCH] = "nomatch",
217 [OP_MATCH_MAX] = "MATCH_MAX",
220 [OP_ASSIGN] = "assign",
221 [OP_ASSIGN_FINAL] = "assign-final",
224 return operation_strs[type];
227 static const char *string_glob_str(enum string_glob_type type)
229 static const char *string_glob_strs[] = {
230 [GL_UNSET] = "UNSET",
231 [GL_PLAIN] = "plain",
233 [GL_SPLIT] = "split",
234 [GL_SPLIT_GLOB] = "split-glob",
235 [GL_SOMETHING] = "split-glob",
236 [GL_FORMAT] = "format",
239 return string_glob_strs[type];
242 static const char *token_str(enum token_type type)
244 static const char *token_strs[] = {
245 [TK_UNSET] = "UNSET",
248 [TK_M_ACTION] = "M ACTION",
249 [TK_M_DEVPATH] = "M DEVPATH",
250 [TK_M_KERNEL] = "M KERNEL",
251 [TK_M_DEVLINK] = "M DEVLINK",
252 [TK_M_NAME] = "M NAME",
253 [TK_M_ENV] = "M ENV",
254 [TK_M_SUBSYSTEM] = "M SUBSYSTEM",
255 [TK_M_DRIVER] = "M DRIVER",
256 [TK_M_WAITFOR] = "M WAITFOR",
257 [TK_M_ATTR] = "M ATTR",
259 [TK_M_PARENTS_MIN] = "M PARENTS_MIN",
260 [TK_M_KERNELS] = "M KERNELS",
261 [TK_M_SUBSYSTEMS] = "M SUBSYSTEMS",
262 [TK_M_DRIVERS] = "M DRIVERS",
263 [TK_M_ATTRS] = "M ATTRS",
264 [TK_M_PARENTS_MAX] = "M PARENTS_MAX",
266 [TK_M_TEST] = "M TEST",
267 [TK_M_PROGRAM] = "M PROGRAM",
268 [TK_M_IMPORT_FILE] = "M IMPORT_FILE",
269 [TK_M_IMPORT_PROG] = "M IMPORT_PROG",
270 [TK_M_IMPORT_PARENT] = "M MPORT_PARENT",
271 [TK_M_RESULT] = "M RESULT",
272 [TK_M_MAX] = "M MAX",
274 [TK_A_IGNORE_DEVICE] = "A IGNORE_DEVICE",
275 [TK_A_STRING_ESCAPE_NONE] = "A STRING_ESCAPE_NONE",
276 [TK_A_STRING_ESCAPE_REPLACE] = "A STRING_ESCAPE_REPLACE",
277 [TK_A_NUM_FAKE_PART] = "A NUM_FAKE_PART",
278 [TK_A_DEVLINK_PRIO] = "A DEVLINK_PRIO",
279 [TK_A_OWNER] = "A OWNER",
280 [TK_A_GROUP] = "A GROUP",
281 [TK_A_MODE] = "A MODE",
282 [TK_A_OWNER_ID] = "A OWNER_ID",
283 [TK_A_GROUP_ID] = "A GROUP_ID",
284 [TK_A_MODE_ID] = "A MODE_ID",
285 [TK_A_ENV] = "A ENV",
286 [TK_A_NAME] = "A NAME",
287 [TK_A_DEVLINK] = "A DEVLINK",
288 [TK_A_EVENT_TIMEOUT] = "A EVENT_TIMEOUT",
289 [TK_A_IGNORE_REMOVE] = "A IGNORE_REMOVE",
290 [TK_A_ATTR] = "A ATTR",
291 [TK_A_RUN] = "A RUN",
292 [TK_A_GOTO] = "A GOTO",
293 [TK_A_LAST_RULE] = "A LAST_RULE",
298 return token_strs[type];
301 static void dump_token(struct udev_rules *rules, struct token *token)
303 enum token_type type = token->type;
304 enum operation_type op = token->key.op;
305 enum string_glob_type glob = token->key.glob;
306 const char *value = &rules->buf[token->key.value_off];
307 const char *attr = &rules->buf[token->key.attr_off];
312 const char *tks_ptr = (char *)rules->tokens;
313 const char *tk_ptr = (char *)token;
314 unsigned int idx = (tk_ptr - tks_ptr) / sizeof(struct token);
316 dbg(rules->udev, "* RULE %s:%u, token: %u, count: %u, label: '%s', flags: 0x%02x\n",
317 &rules->buf[token->rule.filename_off], token->rule.filename_line,
318 idx, token->rule.token_count,
319 &rules->buf[token->rule.label_off],
332 case TK_M_SUBSYSTEMS:
335 case TK_M_IMPORT_FILE:
336 case TK_M_IMPORT_PROG:
337 case TK_M_IMPORT_PARENT:
345 dbg(rules->udev, "%s %s '%s'(%s)\n",
346 token_str(type), operation_str(op), value, string_glob_str(glob));
353 dbg(rules->udev, "%s %s '%s' '%s'(%s)\n",
354 token_str(type), operation_str(op), attr, value, string_glob_str(glob));
356 case TK_A_IGNORE_DEVICE:
357 case TK_A_STRING_ESCAPE_NONE:
358 case TK_A_STRING_ESCAPE_REPLACE:
360 case TK_A_IGNORE_REMOVE:
361 dbg(rules->udev, "%s\n", token_str(type));
364 dbg(rules->udev, "%s %s '%s'(%s) %#o\n",
365 token_str(type), operation_str(op), value, string_glob_str(glob), token->key.mode);
367 case TK_A_NUM_FAKE_PART:
368 dbg(rules->udev, "%s %u\n", token_str(type), token->key.num_fake_part);
370 case TK_A_DEVLINK_PRIO:
371 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.devlink_prio);
374 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.uid);
377 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.gid);
380 dbg(rules->udev, "%s %s %#o\n", token_str(type), operation_str(op), token->key.mode);
382 case TK_A_EVENT_TIMEOUT:
383 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.event_timeout);
386 dbg(rules->udev, "%s '%s' %u\n", token_str(type), value, token->key.rule_goto);
389 dbg(rules->udev, "* %s\n", token_str(type));
391 case TK_M_PARENTS_MIN:
392 case TK_M_PARENTS_MAX:
395 dbg(rules->udev, "unknown type %u\n", type);
400 static void dump_rules(struct udev_rules *rules)
404 dbg(rules->udev, "dumping %u (%zu bytes) tokens, %u (%zu bytes) strings\n",
406 rules->token_cur * sizeof(struct token),
409 for(i = 0; i < rules->token_cur; i++)
410 dump_token(rules, &rules->tokens[i]);
413 static inline const char *operation_str(enum operation_type type) { return NULL; }
414 static inline const char *token_str(enum token_type type) { return NULL; }
415 static inline void dump_token(struct udev_rules *rules, struct token *token) {}
416 static inline void dump_rules(struct udev_rules *rules) {}
419 static int add_new_string(struct udev_rules *rules, const char *str, size_t bytes)
423 /* grow buffer if needed */
424 if (rules->buf_cur + bytes+1 >= rules->buf_max) {
428 /* double the buffer size */
429 add = rules->buf_max;
433 buf = realloc(rules->buf, rules->buf_max + add);
436 dbg(rules->udev, "extend buffer from %zu to %zu\n", rules->buf_max, rules->buf_max + add);
438 rules->buf_max += add;
440 off = rules->buf_cur;
441 memcpy(&rules->buf[rules->buf_cur], str, bytes);
442 rules->buf_cur += bytes;
447 static int add_string(struct udev_rules *rules, const char *str)
449 unsigned int node_idx;
450 struct trie_node *new_node;
451 unsigned int new_node_idx;
459 /* offset 0 is always '\0' */
463 /* descend root - start from last character of str */
465 node_idx = rules->trie_root[key];
468 /* descend suffix trie */
471 struct trie_node *node;
472 unsigned int child_idx;
474 node = &rules->trie_nodes[node_idx];
476 off = node->value_off + node->value_len - len;
478 /* match against current node */
479 if (depth == len || (node->value_len >= len && memcmp(&rules->buf[off], str, len) == 0))
482 /* lookup child node */
483 key = str[len - 1 - depth];
484 child_idx = node->child_idx;
485 while (child_idx > 0) {
486 if (rules->trie_childs[child_idx].key == key)
488 child_idx = rules->trie_childs[child_idx].next_idx;
492 node_idx = rules->trie_childs[child_idx].node_idx;
496 /* string not found, add it */
497 off = add_new_string(rules, str, len + 1);
499 /* grow trie nodes if needed */
500 if (rules->trie_nodes_cur >= rules->trie_nodes_max) {
501 struct trie_node *nodes;
504 /* double the buffer size */
505 add = rules->trie_nodes_max;
509 nodes = realloc(rules->trie_nodes, (rules->trie_nodes_max + add) * sizeof(struct trie_node));
512 dbg(rules->udev, "extend trie nodes from %u to %u\n",
513 rules->trie_nodes_max, rules->trie_nodes_max + add);
514 rules->trie_nodes = nodes;
515 rules->trie_nodes_max += add;
518 /* grow trie childs if needed */
519 if (rules->trie_childs_cur >= rules->trie_childs_max) {
520 struct trie_child *childs;
523 /* double the buffer size */
524 add = rules->trie_childs_max;
528 childs = realloc(rules->trie_childs, (rules->trie_childs_max + add) * sizeof(struct trie_child));
531 dbg(rules->udev, "extend trie childs from %u to %u\n",
532 rules->trie_childs_max, rules->trie_childs_max + add);
533 rules->trie_childs = childs;
534 rules->trie_childs_max += add;
538 new_node_idx = rules->trie_nodes_cur;
539 rules->trie_nodes_cur++;
540 new_node = &rules->trie_nodes[new_node_idx];
541 new_node->value_off = off;
542 new_node->value_len = len;
543 new_node->child_idx = 0;
544 new_node->last_child_idx = 0;
547 /* add node to root */
548 rules->trie_root[key] = new_node_idx;
550 /* add node to parent */
551 struct trie_node *parent;
552 struct trie_child *new_child;
553 unsigned int new_child_idx;
555 /* get new child link for list of childs of parent */
556 new_child_idx = rules->trie_childs_cur;
557 rules->trie_childs_cur++;
558 new_child = &rules->trie_childs[new_child_idx];
559 new_child->next_idx = 0;
560 new_child->node_idx = new_node_idx;
561 new_child->key = key;
563 /* append child link to list of childs of parent */
564 parent = &rules->trie_nodes[node_idx];
565 if (parent->child_idx == 0) {
566 parent->child_idx = new_child_idx;
568 struct trie_child *last_child;
570 last_child = &rules->trie_childs[parent->last_child_idx];
571 last_child->next_idx = new_child_idx;
573 parent->last_child_idx = new_child_idx;
578 static int add_token(struct udev_rules *rules, struct token *token)
580 /* grow buffer if needed */
581 if (rules->token_cur+1 >= rules->token_max) {
582 struct token *tokens;
585 /* double the buffer size */
586 add = rules->token_max;
590 tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
593 dbg(rules->udev, "extend tokens from %u to %u\n", rules->token_max, rules->token_max + add);
594 rules->tokens = tokens;
595 rules->token_max += add;
597 memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
602 static uid_t add_uid(struct udev_rules *rules, const char *owner)
608 /* lookup, if we know it already */
609 for (i = 0; i < rules->uids_cur; i++) {
610 off = rules->uids[i].name_off;
611 if (strcmp(&rules->buf[off], owner) == 0) {
612 uid = rules->uids[i].uid;
613 dbg(rules->udev, "return existing %u for '%s'\n", uid, owner);
617 uid = util_lookup_user(rules->udev, owner);
619 /* grow buffer if needed */
620 if (rules->uids_cur+1 >= rules->uids_max) {
621 struct uid_gid *uids;
624 /* double the buffer size */
625 add = rules->uids_max;
629 uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
632 dbg(rules->udev, "extend uids from %u to %u\n", rules->uids_max, rules->uids_max + add);
634 rules->uids_max += add;
636 rules->uids[rules->uids_cur].uid = uid;
637 off = add_string(rules, owner);
640 rules->uids[rules->uids_cur].name_off = off;
645 static gid_t add_gid(struct udev_rules *rules, const char *group)
651 /* lookup, if we know it already */
652 for (i = 0; i < rules->gids_cur; i++) {
653 off = rules->gids[i].name_off;
654 if (strcmp(&rules->buf[off], group) == 0) {
655 gid = rules->gids[i].gid;
656 dbg(rules->udev, "return existing %u for '%s'\n", gid, group);
660 gid = util_lookup_group(rules->udev, group);
662 /* grow buffer if needed */
663 if (rules->gids_cur+1 >= rules->gids_max) {
664 struct uid_gid *gids;
667 /* double the buffer size */
668 add = rules->gids_max;
672 gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid));
675 dbg(rules->udev, "extend gids from %u to %u\n", rules->gids_max, rules->gids_max + add);
677 rules->gids_max += add;
679 rules->gids[rules->gids_cur].gid = gid;
680 off = add_string(rules, group);
683 rules->gids[rules->gids_cur].name_off = off;
688 static int import_property_from_string(struct udev_device *dev, char *line)
690 struct udev *udev = udev_device_get_udev(dev);
697 while (isspace(key[0]))
700 /* comment or empty line */
701 if (key[0] == '#' || key[0] == '\0')
704 /* split key/value */
705 val = strchr(key, '=');
712 while (isspace(val[0]))
719 while (isspace(key[len-1]))
723 /* terminate value */
727 while (isspace(val[len-1]))
735 if (val[0] == '"' || val[0] == '\'') {
736 if (val[len-1] != val[0]) {
737 info(udev, "inconsistent quoting: '%s', skip\n", line);
744 dbg(udev, "adding '%s'='%s'\n", key, val);
746 /* handle device, renamed by external tool, returning new path */
747 if (strcmp(key, "DEVPATH") == 0) {
748 char syspath[UTIL_PATH_SIZE];
750 info(udev, "updating devpath from '%s' to '%s'\n",
751 udev_device_get_devpath(dev), val);
752 util_strlcpy(syspath, udev_get_sys_path(udev), sizeof(syspath));
753 util_strlcat(syspath, val, sizeof(syspath));
754 udev_device_set_syspath(dev, syspath);
756 struct udev_list_entry *entry;
758 entry = udev_device_add_property(dev, key, val);
760 udev_list_entry_set_flag(entry, 1);
765 static int import_file_into_properties(struct udev_device *dev, const char *filename)
768 char line[UTIL_LINE_SIZE];
770 f = fopen(filename, "r");
773 while (fgets(line, sizeof(line), f) != NULL)
774 import_property_from_string(dev, line);
779 static int import_program_into_properties(struct udev_device *dev, const char *program)
781 struct udev *udev = udev_device_get_udev(dev);
787 envp = udev_device_get_properties_envp(dev);
788 if (util_run_program(udev, program, envp, result, sizeof(result), &reslen) != 0)
792 while (line != NULL) {
795 pos = strchr(line, '\n');
800 import_property_from_string(dev, line);
806 static int import_parent_into_properties(struct udev_device *dev, const char *filter)
808 struct udev *udev = udev_device_get_udev(dev);
809 struct udev_device *dev_parent;
810 struct udev_list_entry *list_entry;
812 dev_parent = udev_device_get_parent(dev);
813 if (dev_parent == NULL)
816 dbg(udev, "found parent '%s', get the node name\n", udev_device_get_syspath(dev_parent));
817 udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
818 const char *key = udev_list_entry_get_name(list_entry);
819 const char *val = udev_list_entry_get_value(list_entry);
821 if (fnmatch(filter, key, 0) == 0) {
822 struct udev_list_entry *entry;
824 dbg(udev, "import key '%s=%s'\n", key, val);
825 entry = udev_device_add_property(dev, key, val);
827 udev_list_entry_set_flag(entry, 1);
833 #define WAIT_LOOP_PER_SECOND 50
834 static int wait_for_file(struct udev_device *dev, const char *file, int timeout)
836 struct udev *udev = udev_device_get_udev(dev);
837 char filepath[UTIL_PATH_SIZE];
838 char devicepath[UTIL_PATH_SIZE];
840 int loop = timeout * WAIT_LOOP_PER_SECOND;
842 /* a relative path is a device attribute */
843 devicepath[0] = '\0';
844 if (file[0] != '/') {
845 util_strlcpy(devicepath, udev_get_sys_path(udev), sizeof(devicepath));
846 util_strlcat(devicepath, udev_device_get_devpath(dev), sizeof(devicepath));
848 util_strlcpy(filepath, devicepath, sizeof(filepath));
849 util_strlcat(filepath, "/", sizeof(filepath));
850 util_strlcat(filepath, file, sizeof(filepath));
854 dbg(udev, "will wait %i sec for '%s'\n", timeout, file);
857 if (stat(file, &stats) == 0) {
858 info(udev, "file '%s' appeared after %i loops\n", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
861 /* make sure, the device did not disappear in the meantime */
862 if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
863 info(udev, "device disappeared while waiting for '%s'\n", file);
866 info(udev, "wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND);
867 usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND);
869 info(udev, "waiting for '%s' failed\n", file);
873 static int attr_subst_subdir(char *attr, size_t len)
878 pos = strstr(attr, "/*/");
880 char str[UTIL_PATH_SIZE];
884 util_strlcpy(str, &pos[2], sizeof(str));
889 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
892 if (dent->d_name[0] == '.')
894 util_strlcat(attr, dent->d_name, len);
895 util_strlcat(attr, str, len);
896 if (stat(attr, &stats) == 0) {
905 util_strlcat(attr, str, len);
911 static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value)
917 if (linepos == NULL && linepos[0] == '\0')
920 /* skip whitespace */
921 while (isspace(linepos[0]) || linepos[0] == ',')
925 if (linepos[0] == '\0')
931 if (linepos[0] == '\0')
933 if (isspace(linepos[0]))
935 if (linepos[0] == '=')
937 if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
938 if (linepos[1] == '=')
942 /* remember end of key */
945 /* skip whitespace after key */
946 while (isspace(linepos[0]))
948 if (linepos[0] == '\0')
951 /* get operation type */
952 if (linepos[0] == '=' && linepos[1] == '=') {
955 } else if (linepos[0] == '!' && linepos[1] == '=') {
958 } else if (linepos[0] == '+' && linepos[1] == '=') {
961 } else if (linepos[0] == '=') {
964 } else if (linepos[0] == ':' && linepos[1] == '=') {
965 *op = OP_ASSIGN_FINAL;
973 /* skip whitespace after operator */
974 while (isspace(linepos[0]))
976 if (linepos[0] == '\0')
980 if (linepos[0] == '"')
987 temp = strchr(linepos, '"');
992 dbg(udev, "%s '%s'-'%s'\n", operation_str(*op), *key, *value);
994 /* move line to next key */
999 /* extract possible KEY{attr} */
1000 static char *get_key_attribute(struct udev *udev, char *str)
1005 attr = strchr(str, '{');
1008 pos = strchr(attr, '}');
1010 err(udev, "missing closing brace for format\n");
1014 dbg(udev, "attribute='%s'\n", attr);
1020 static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
1021 enum operation_type op,
1022 const char *value, const void *data)
1024 struct token *token = &rule_tmp->token[rule_tmp->token_cur];
1025 const char *attr = data;
1026 enum string_glob_type glob;
1028 memset(token, 0x00, sizeof(struct token));
1034 case TK_M_SUBSYSTEM:
1040 case TK_M_SUBSYSTEMS:
1043 case TK_M_IMPORT_FILE:
1044 case TK_M_IMPORT_PROG:
1045 case TK_M_IMPORT_PARENT:
1053 token->key.value_off = add_string(rule_tmp->rules, value);
1060 token->key.value_off = add_string(rule_tmp->rules, value);
1061 token->key.attr_off = add_string(rule_tmp->rules, attr);
1064 token->key.value_off = add_string(rule_tmp->rules, value);
1066 token->key.mode = *(mode_t *)data;
1068 case TK_A_IGNORE_DEVICE:
1069 case TK_A_STRING_ESCAPE_NONE:
1070 case TK_A_STRING_ESCAPE_REPLACE:
1071 case TK_A_IGNORE_REMOVE:
1072 case TK_A_LAST_RULE:
1075 token->key.value_off = add_string(rule_tmp->rules, value);
1076 token->key.ignore_error = *(int *)data;
1078 case TK_A_NUM_FAKE_PART:
1079 token->key.num_fake_part = *(int *)data;
1081 case TK_A_DEVLINK_PRIO:
1082 token->key.devlink_prio = *(int *)data;
1085 token->key.uid = *(uid_t *)data;
1088 token->key.gid = *(gid_t *)data;
1091 token->key.mode = *(mode_t *)data;
1093 case TK_A_EVENT_TIMEOUT:
1094 token->key.event_timeout = *(int *)data;
1097 case TK_M_PARENTS_MIN:
1098 case TK_M_PARENTS_MAX:
1102 err(rule_tmp->rules->udev, "wrong type %u\n", type);
1107 if (value != NULL) {
1108 if (type < TK_M_MAX) {
1109 /* check if we need to split or call fnmatch() while matching rules */
1113 has_split = (strchr(value, '|') != NULL);
1114 has_glob = (strchr(value, '*') != NULL || strchr(value, '?') != NULL ||
1115 strchr(value, '[') != NULL || strchr(value, ']') != NULL);
1116 if (has_split && has_glob) {
1117 glob = GL_SPLIT_GLOB;
1118 } else if (has_split) {
1120 } else if (has_glob) {
1121 if (strcmp(value, "?*") == 0)
1122 glob = GL_SOMETHING;
1127 /* check if we need to substitute format strings for matching rules */
1128 if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
1133 token->key.type = type;
1135 token->key.glob = glob;
1136 rule_tmp->token_cur++;
1137 if (rule_tmp->token_cur >= ARRAY_SIZE(rule_tmp->token)) {
1138 err(rule_tmp->rules->udev, "temporary rule array too small\n");
1144 static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp)
1147 unsigned int start = 0;
1148 unsigned int end = rule_tmp->token_cur;
1150 for (i = 0; i < rule_tmp->token_cur; i++) {
1151 enum token_type next_val = TK_UNSET;
1152 unsigned int next_idx;
1155 /* find smallest value */
1156 for (j = start; j < end; j++) {
1157 if (rule_tmp->token[j].type == TK_UNSET)
1159 if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
1160 next_val = rule_tmp->token[j].type;
1165 /* add token and mark done */
1166 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
1168 rule_tmp->token[next_idx].type = TK_UNSET;
1171 if (next_idx == start)
1173 if (next_idx+1 == end)
1179 static int add_rule(struct udev_rules *rules, char *line,
1180 const char *filename, unsigned int filename_off, unsigned int lineno)
1186 struct rule_tmp rule_tmp;
1188 memset(&rule_tmp, 0x00, sizeof(struct rule_tmp));
1189 rule_tmp.rules = rules;
1190 rule_tmp.rule.type = TK_RULE;
1191 rule_tmp.rule.rule.filename_off = filename_off;
1192 rule_tmp.rule.rule.filename_line = lineno;
1198 enum operation_type op;
1200 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0)
1203 if (strcasecmp(key, "ACTION") == 0) {
1204 if (op > OP_MATCH_MAX) {
1205 err(rules->udev, "invalid ACTION operation\n");
1208 rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL);
1213 if (strcasecmp(key, "DEVPATH") == 0) {
1214 if (op > OP_MATCH_MAX) {
1215 err(rules->udev, "invalid DEVPATH operation\n");
1218 rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
1223 if (strcasecmp(key, "KERNEL") == 0) {
1224 if (op > OP_MATCH_MAX) {
1225 err(rules->udev, "invalid KERNEL operation\n");
1228 rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL);
1233 if (strcasecmp(key, "SUBSYSTEM") == 0) {
1234 if (op > OP_MATCH_MAX) {
1235 err(rules->udev, "invalid SUBSYSTEM operation\n");
1238 /* bus, class, subsystem events should all be the same */
1239 if (strcmp(value, "subsystem") == 0 ||
1240 strcmp(value, "bus") == 0 ||
1241 strcmp(value, "class") == 0) {
1242 if (strcmp(value, "bus") == 0 || strcmp(value, "class") == 0)
1243 err(rules->udev, "'%s' must be specified as 'subsystem' \n"
1244 "please fix it in %s:%u", value, filename, lineno);
1245 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
1247 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
1252 if (strcasecmp(key, "DRIVER") == 0) {
1253 if (op > OP_MATCH_MAX) {
1254 err(rules->udev, "invalid DRIVER operation\n");
1257 rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL);
1262 if (strncasecmp(key, "ATTR{", sizeof("ATTR{")-1) == 0) {
1263 attr = get_key_attribute(rules->udev, key + sizeof("ATTR")-1);
1265 err(rules->udev, "error parsing ATTR attribute\n");
1268 if (op < OP_MATCH_MAX) {
1269 rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
1271 rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr);
1277 if (strcasecmp(key, "KERNELS") == 0 ||
1278 strcasecmp(key, "ID") == 0) {
1279 if (op > OP_MATCH_MAX) {
1280 err(rules->udev, "invalid KERNELS operation\n");
1283 rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1288 if (strcasecmp(key, "SUBSYSTEMS") == 0 ||
1289 strcasecmp(key, "BUS") == 0) {
1290 if (op > OP_MATCH_MAX) {
1291 err(rules->udev, "invalid SUBSYSTEMS operation\n");
1294 rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1299 if (strcasecmp(key, "DRIVERS") == 0) {
1300 if (op > OP_MATCH_MAX) {
1301 err(rules->udev, "invalid DRIVERS operation\n");
1304 rule_add_key(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
1309 if (strncasecmp(key, "ATTRS{", sizeof("ATTRS{")-1) == 0 ||
1310 strncasecmp(key, "SYSFS{", sizeof("SYSFS{")-1) == 0) {
1311 if (op > OP_MATCH_MAX) {
1312 err(rules->udev, "invalid ATTRS operation\n");
1315 attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
1317 err(rules->udev, "error parsing ATTRS attribute\n");
1320 if (strncmp(attr, "device/", 7) == 0)
1321 err(rules->udev, "the 'device' link may not be available in a future kernel, "
1322 "please fix it in %s:%u", filename, lineno);
1323 else if (strstr(attr, "../") != NULL)
1324 err(rules->udev, "do not reference parent sysfs directories directly, "
1325 "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
1326 rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1331 if (strncasecmp(key, "ENV{", sizeof("ENV{")-1) == 0) {
1332 attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1);
1334 err(rules->udev, "error parsing ENV attribute\n");
1337 if (strncmp(attr, "PHYSDEV", 7) == 0)
1339 if (op < OP_MATCH_MAX) {
1340 if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
1343 if (rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
1350 if (strcasecmp(key, "PROGRAM") == 0) {
1351 rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
1356 if (strcasecmp(key, "RESULT") == 0) {
1357 if (op > OP_MATCH_MAX) {
1358 err(rules->udev, "invalid RESULT operation\n");
1361 rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL);
1366 if (strncasecmp(key, "IMPORT", sizeof("IMPORT")-1) == 0) {
1367 attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1);
1368 if (attr != NULL && strstr(attr, "program")) {
1369 dbg(rules->udev, "IMPORT will be executed\n");
1370 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1372 } else if (attr != NULL && strstr(attr, "file")) {
1373 dbg(rules->udev, "IMPORT will be included as file\n");
1374 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1376 } else if (attr != NULL && strstr(attr, "parent")) {
1377 dbg(rules->udev, "IMPORT will include the parent values\n");
1378 rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
1381 /* figure it out if it is executable */
1382 char file[UTIL_PATH_SIZE];
1384 struct stat statbuf;
1386 util_strlcpy(file, value, sizeof(file));
1387 pos = strchr(file, ' ');
1391 /* allow programs in /lib/udev called without the path */
1392 if (strchr(file, '/') == NULL) {
1393 util_strlcpy(file, UDEV_PREFIX "/lib/udev/", sizeof(file));
1394 util_strlcat(file, value, sizeof(file));
1395 pos = strchr(file, ' ');
1400 dbg(rules->udev, "IMPORT auto mode for '%s'\n", file);
1401 if (!lstat(file, &statbuf) && (statbuf.st_mode & S_IXUSR)) {
1402 dbg(rules->udev, "IMPORT will be executed (autotype)\n");
1403 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1406 dbg(rules->udev, "IMPORT will be included as file (autotype)\n");
1407 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1414 if (strncasecmp(key, "TEST", sizeof("TEST")-1) == 0) {
1417 if (op > OP_MATCH_MAX) {
1418 err(rules->udev, "invalid TEST operation\n");
1421 attr = get_key_attribute(rules->udev, key + sizeof("TEST")-1);
1423 mode = strtol(attr, NULL, 8);
1424 rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode);
1426 rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL);
1432 if (strncasecmp(key, "RUN", sizeof("RUN")-1) == 0) {
1435 attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1);
1436 if (attr != NULL && strstr(attr, "ignore_error"))
1438 rule_add_key(&rule_tmp, TK_A_RUN, op, value, &flag);
1443 if (strcasecmp(key, "WAIT_FOR") == 0 || strcasecmp(key, "WAIT_FOR_SYSFS") == 0) {
1444 rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1449 if (strcasecmp(key, "LABEL") == 0) {
1450 rule_tmp.rule.rule.label_off = add_string(rules, value);
1455 if (strcasecmp(key, "GOTO") == 0) {
1456 rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1461 if (strncasecmp(key, "NAME", sizeof("NAME")-1) == 0) {
1462 if (op < OP_MATCH_MAX) {
1463 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
1465 if (value[0] == '\0')
1466 dbg(rules->udev, "name empty, node creation suppressed\n");
1467 rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL);
1468 attr = get_key_attribute(rules->udev, key + sizeof("NAME")-1);
1470 if (strstr(attr, "all_partitions") != NULL) {
1471 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1473 dbg(rules->udev, "creation of partition nodes requested\n");
1474 rule_add_key(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1476 if (strstr(attr, "ignore_remove") != NULL) {
1477 dbg(rules->udev, "remove event should be ignored\n");
1478 rule_add_key(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1482 rule_tmp.rule.rule.flags = 1;
1486 if (strcasecmp(key, "SYMLINK") == 0) {
1487 if (op < OP_MATCH_MAX)
1488 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
1490 rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, NULL);
1491 rule_tmp.rule.rule.flags = 1;
1496 if (strcasecmp(key, "OWNER") == 0) {
1500 uid = strtoul(value, &endptr, 10);
1501 if (endptr[0] == '\0') {
1502 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1503 } else if (rules->resolve_names && strchr("$%", value[0]) == NULL) {
1504 uid = add_uid(rules, value);
1505 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1507 rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
1509 rule_tmp.rule.rule.flags = 1;
1514 if (strcasecmp(key, "GROUP") == 0) {
1518 gid = strtoul(value, &endptr, 10);
1519 if (endptr[0] == '\0') {
1520 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1521 } else if (rules->resolve_names && strchr("$%", value[0]) == NULL) {
1522 gid = add_gid(rules, value);
1523 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1525 rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
1527 rule_tmp.rule.rule.flags = 1;
1532 if (strcasecmp(key, "MODE") == 0) {
1536 mode = strtol(value, &endptr, 8);
1537 if (endptr[0] == '\0')
1538 rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1540 rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
1541 rule_tmp.rule.rule.flags = 1;
1546 if (strcasecmp(key, "OPTIONS") == 0) {
1549 if (strstr(value, "last_rule") != NULL) {
1550 dbg(rules->udev, "last rule to be applied\n");
1551 rule_add_key(&rule_tmp, TK_A_LAST_RULE, 0, NULL, NULL);
1553 if (strstr(value, "ignore_device") != NULL) {
1554 dbg(rules->udev, "device should be ignored\n");
1555 rule_add_key(&rule_tmp, TK_A_IGNORE_DEVICE, 0, NULL, NULL);
1557 if (strstr(value, "ignore_remove") != NULL) {
1558 dbg(rules->udev, "remove event should be ignored\n");
1559 rule_add_key(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1561 pos = strstr(value, "link_priority=");
1563 int prio = atoi(&pos[strlen("link_priority=")]);
1565 rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, 0, NULL, &prio);
1566 dbg(rules->udev, "link priority=%i\n", prio);
1568 pos = strstr(value, "event_timeout=");
1570 int tout = atoi(&pos[strlen("event_timeout=")]);
1572 rule_add_key(&rule_tmp, TK_A_EVENT_TIMEOUT, 0, NULL, &tout);
1573 dbg(rules->udev, "event timout=%i\n", tout);
1575 pos = strstr(value, "string_escape=");
1577 pos = &pos[strlen("string_escape=")];
1578 if (strncmp(pos, "none", strlen("none")) == 0)
1579 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, 0, NULL, NULL);
1580 else if (strncmp(pos, "replace", strlen("replace")) == 0)
1581 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, 0, NULL, NULL);
1583 if (strstr(value, "all_partitions") != NULL) {
1584 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1586 rule_add_key(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1587 dbg(rules->udev, "creation of partition nodes requested\n");
1592 err(rules->udev, "unknown key '%s' in %s:%u\n", key, filename, lineno);
1596 err(rules->udev, "PHYSDEV* values are deprecated and not available on recent kernels, \n"
1597 "please fix it in %s:%u", filename, lineno);
1599 /* skip line if not any valid key was found */
1603 /* add rule token */
1604 rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur;
1605 if (add_token(rules, &rule_tmp.rule) != 0)
1608 /* add tokens to list, sorted by type */
1609 if (sort_token(rules, &rule_tmp) != 0)
1614 err(rules->udev, "invalid rule '%s:%u'\n", filename, lineno);
1618 static int parse_file(struct udev_rules *rules, const char *filename, unsigned short filename_off)
1621 unsigned int first_token;
1622 char line[UTIL_LINE_SIZE];
1626 info(rules->udev, "reading '%s' as rules file\n", filename);
1628 f = fopen(filename, "r");
1632 first_token = rules->token_cur;
1634 while(fgets(line, sizeof(line), f) != NULL) {
1638 /* skip whitespace */
1641 while (isspace(key[0]))
1652 /* continue reading if backslash+newline is found */
1653 while (line[len-2] == '\\') {
1654 if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1660 if (len+1 >= sizeof(line)) {
1661 err(rules->udev, "line too long '%s':%u, ignored\n", filename, line_nr);
1664 add_rule(rules, key, filename, filename_off, line_nr);
1668 /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1669 for (i = first_token+1; i < rules->token_cur; i++) {
1670 if (rules->tokens[i].type == TK_A_GOTO) {
1671 char *label = &rules->buf[rules->tokens[i].key.value_off];
1674 for (j = i+1; j < rules->token_cur; j++) {
1675 if (rules->tokens[j].type != TK_RULE)
1677 if (rules->tokens[j].rule.label_off == 0)
1679 if (strcmp(label, &rules->buf[rules->tokens[j].rule.label_off]) != 0)
1681 rules->tokens[i].key.rule_goto = j;
1683 if (rules->tokens[i].key.rule_goto == 0)
1684 err(rules->udev, "GOTO '%s' has no matching label in: '%s'\n", label, filename);
1690 static int add_matching_files(struct udev *udev, struct udev_list_node *file_list, const char *dirname, const char *suffix)
1693 char filename[UTIL_PATH_SIZE];
1695 dbg(udev, "open directory '%s'\n", dirname);
1696 dir = opendir(dirname);
1698 err(udev, "unable to open '%s': %m\n", dirname);
1703 struct dirent *dent;
1705 dent = readdir(dir);
1706 if (dent == NULL || dent->d_name[0] == '\0')
1709 if (dent->d_name[0] == '.')
1712 /* look for file matching with specified suffix */
1713 if (suffix != NULL) {
1716 ext = strrchr(dent->d_name, '.');
1719 if (strcmp(ext, suffix) != 0)
1722 dbg(udev, "put file '%s/%s' into list\n", dirname, dent->d_name);
1724 snprintf(filename, sizeof(filename), "%s/%s", dirname, dent->d_name);
1725 filename[sizeof(filename)-1] = '\0';
1726 udev_list_entry_add(udev, file_list, filename, NULL, 1, 1);
1733 struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
1735 struct udev_rules *rules;
1736 struct stat statbuf;
1737 struct udev_list_node file_list;
1738 struct udev_list_entry *file_loop, *file_tmp;
1739 struct token end_token;
1741 rules = malloc(sizeof(struct udev_rules));
1744 memset(rules, 0x00, sizeof(struct udev_rules));
1746 rules->resolve_names = resolve_names;
1747 udev_list_init(&file_list);
1749 /* init token array and string buffer */
1750 rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
1751 if (rules->tokens == NULL)
1753 rules->token_max = PREALLOC_TOKEN;
1755 rules->buf = malloc(PREALLOC_STRBUF);
1756 if (rules->buf == NULL)
1758 rules->buf_max = PREALLOC_STRBUF;
1759 /* offset 0 is always '\0' */
1760 rules->buf[0] = '\0';
1762 dbg(udev, "prealloc %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1763 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1765 rules->trie_nodes = malloc(PREALLOC_TRIE * sizeof(struct trie_node));
1766 if (rules->trie_nodes == NULL)
1768 rules->trie_nodes_max = PREALLOC_TRIE;
1769 /* offset 0 is reserved for the null trie node */
1770 rules->trie_nodes_cur = 1;
1772 rules->trie_childs = malloc(PREALLOC_TRIE * sizeof(struct trie_child));
1773 if (rules->trie_childs == NULL)
1775 rules->trie_childs_max = PREALLOC_TRIE;
1777 rules->trie_root = calloc(UCHAR_MAX + 1, sizeof(unsigned short));
1779 if (udev_get_rules_path(udev) != NULL) {
1780 /* custom rules location for testing */
1781 add_matching_files(udev, &file_list, udev_get_rules_path(udev), ".rules");
1783 char filename[PATH_MAX];
1784 struct udev_list_node sort_list;
1785 struct udev_list_entry *sort_loop, *sort_tmp;
1787 /* read user/custom rules */
1788 add_matching_files(udev, &file_list, SYSCONFDIR "/udev/rules.d", ".rules");
1790 /* read dynamic/temporary rules */
1791 util_strlcpy(filename, udev_get_dev_path(udev), sizeof(filename));
1792 util_strlcat(filename, "/.udev/rules.d", sizeof(filename));
1793 if (stat(filename, &statbuf) != 0) {
1794 util_create_path(udev, filename);
1795 udev_selinux_setfscreatecon(udev, filename, S_IFDIR|0755);
1796 mkdir(filename, 0755);
1797 udev_selinux_resetfscreatecon(udev);
1799 udev_list_init(&sort_list);
1800 add_matching_files(udev, &sort_list, filename, ".rules");
1802 /* read default rules */
1803 add_matching_files(udev, &sort_list, UDEV_PREFIX "/lib/udev/rules.d", ".rules");
1805 /* sort all rules files by basename into list of files */
1806 udev_list_entry_foreach_safe(sort_loop, sort_tmp, udev_list_get_entry(&sort_list)) {
1807 const char *sort_name = udev_list_entry_get_name(sort_loop);
1808 const char *sort_base = strrchr(sort_name, '/');
1810 if (sort_base == NULL)
1812 /* sort entry into existing list */
1813 udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1814 const char *file_name = udev_list_entry_get_name(file_loop);
1815 const char *file_base = strrchr(file_name, '/');
1817 if (file_base == NULL)
1819 if (strcmp(file_base, sort_base) == 0) {
1820 info(udev, "rule file basename '%s' already added, ignoring '%s'\n",
1821 file_name, sort_name);
1822 udev_list_entry_delete(sort_loop);
1826 if (strcmp(file_base, sort_base) > 0) {
1827 /* found later file, insert before */
1828 udev_list_entry_remove(sort_loop);
1829 udev_list_entry_insert_before(sort_loop, file_loop);
1834 /* current file already handled */
1835 if (sort_loop == NULL)
1837 /* no later file, append to end of list */
1838 udev_list_entry_remove(sort_loop);
1839 udev_list_entry_append(sort_loop, &file_list);
1843 /* add all filenames to the string buffer */
1844 udev_list_entry_foreach(file_loop, udev_list_get_entry(&file_list)) {
1845 const char *filename = udev_list_entry_get_name(file_loop);
1846 unsigned int filename_off;
1848 filename_off = add_string(rules, filename);
1849 /* the offset in the rule is limited to unsigned short */
1850 if (filename_off < USHRT_MAX)
1851 udev_list_entry_set_flag(file_loop, filename_off);
1854 /* parse list of files */
1855 udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1856 const char *filename = udev_list_entry_get_name(file_loop);
1857 unsigned int filename_off = udev_list_entry_get_flag(file_loop);
1859 if (stat(filename, &statbuf) == 0 && statbuf.st_size > 0)
1860 parse_file(rules, filename, filename_off);
1862 info(udev, "can not read '%s'\n", filename);
1863 udev_list_entry_delete(file_loop);
1866 memset(&end_token, 0x00, sizeof(struct token));
1867 end_token.type = TK_END;
1868 add_token(rules, &end_token);
1870 /* shrink allocated token and string buffer */
1871 if (rules->token_cur < rules->token_max) {
1872 struct token *tokens;
1874 tokens = realloc(rules->tokens, rules->token_cur * sizeof(struct token));
1875 if (tokens != NULL || rules->token_cur == 0) {
1876 rules->tokens = tokens;
1877 rules->token_max = rules->token_cur;
1880 if (rules->buf_cur < rules->buf_max) {
1883 buf = realloc(rules->buf, rules->buf_cur);
1884 if (buf != NULL || rules->buf_cur == 0) {
1886 rules->buf_max = rules->buf_cur;
1889 info(udev, "shrunk to %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1890 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1891 info(udev, "used %zu bytes for index (%u * %zu bytes nodes, %u * %zu bytes child links)\n",
1892 rules->trie_nodes_cur * sizeof(struct trie_node) + rules->trie_childs_cur * sizeof(struct trie_child),
1893 rules->trie_nodes_cur, sizeof(struct trie_node),
1894 rules->trie_childs_cur, sizeof(struct trie_child));
1897 free(rules->trie_nodes);
1898 rules->trie_nodes = NULL;
1899 rules->trie_nodes_cur = 0;
1900 rules->trie_nodes_max = 0;
1901 free(rules->trie_childs);
1902 rules->trie_childs = NULL;
1903 rules->trie_childs_cur = 0;
1904 rules->trie_childs_max = 0;
1905 free(rules->trie_root);
1906 rules->trie_root = NULL;
1908 /* cleanup uid/gid cache */
1911 rules->uids_cur = 0;
1912 rules->uids_max = 0;
1915 rules->gids_cur = 0;
1916 rules->gids_max = 0;
1922 void udev_rules_unref(struct udev_rules *rules)
1926 free(rules->tokens);
1928 free(rules->trie_nodes);
1929 free(rules->trie_childs);
1930 free(rules->trie_root);
1936 static int match_key(struct udev_rules *rules, struct token *token, const char *val)
1938 char *key_value = &rules->buf[token->key.value_off];
1945 switch (token->key.glob) {
1947 match = (strcmp(key_value, val) == 0);
1950 match = (fnmatch(key_value, val, 0) == 0);
1957 split = &rules->buf[token->key.value_off];
1962 next = strchr(split, '|');
1964 size_t matchlen = (size_t)(next - split);
1966 match = (matchlen == len && strncmp(split, val, matchlen) == 0);
1970 match = (strcmp(split, val) == 0);
1979 char value[UTIL_PATH_SIZE];
1981 util_strlcpy(value, &rules->buf[token->key.value_off], sizeof(value));
1983 while (key_value != NULL) {
1984 pos = strchr(key_value, '|');
1989 dbg(rules->udev, "match %s '%s' <-> '%s'\n", token_str(token->type), key_value, val);
1990 match = (fnmatch(key_value, val, 0) == 0);
1998 match = (val[0] != '\0');
2005 if (match && (token->key.op == OP_MATCH)) {
2006 dbg(rules->udev, "%s is true (matching value)\n", token_str(token->type));
2009 if (!match && (token->key.op == OP_NOMATCH)) {
2010 dbg(rules->udev, "%s is true (non-matching value)\n", token_str(token->type));
2013 dbg(rules->udev, "%s is not true\n", token_str(token->type));
2017 static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur)
2019 const char *key_name = &rules->buf[cur->key.attr_off];
2020 const char *key_value = &rules->buf[cur->key.value_off];
2021 char value[UTIL_NAME_SIZE];
2025 if (key_name[0] == '[') {
2026 char attr[UTIL_PATH_SIZE];
2028 util_strlcpy(attr, key_name, sizeof(attr));
2029 util_resolve_subsys_kernel(event->udev, attr, value, sizeof(value), 1);
2031 if (value[0] == '\0') {
2034 val = udev_device_get_sysattr_value(dev, key_name);
2037 util_strlcpy(value, val, sizeof(value));
2040 /* strip trailing whitespace of value, if not asked to match for it */
2041 len = strlen(key_value);
2042 if (len > 0 && !isspace(key_value[len-1])) {
2043 len = strlen(value);
2044 while (len > 0 && isspace(value[--len]))
2046 dbg(rules->udev, "removed trailing whitespace from '%s'\n", value);
2048 return match_key(rules, cur, value);
2057 int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event)
2061 enum escape_type esc = ESCAPE_UNSET;
2064 if (rules->tokens == NULL)
2067 can_set_name = ((strcmp(udev_device_get_action(event->dev), "add") == 0 ||
2068 strcmp(udev_device_get_action(event->dev), "change") == 0) &&
2069 (major(udev_device_get_devnum(event->dev)) > 0 ||
2070 strcmp(udev_device_get_subsystem(event->dev), "net") == 0));
2072 /* loop through token list, match, run actions or forward to next rule */
2073 cur = &rules->tokens[0];
2076 dump_token(rules, cur);
2077 switch (cur->type) {
2081 /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
2082 if (!can_set_name && rule->rule.flags)
2087 if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
2091 if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
2095 if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
2100 size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
2101 struct udev_list_entry *list_entry;
2104 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
2105 const char *devlink;
2107 devlink = &udev_list_entry_get_name(list_entry)[devlen];
2108 if (match_key(rules, cur, devlink) == 0) {
2118 if (match_key(rules, cur, event->name) != 0)
2123 struct udev_list_entry *list_entry;
2124 const char *key_name = &rules->buf[cur->key.attr_off];
2127 list_entry = udev_device_get_properties_list_entry(event->dev);
2128 list_entry = udev_list_entry_get_by_name(list_entry, key_name);
2129 value = udev_list_entry_get_value(list_entry);
2130 if (value == NULL) {
2131 dbg(event->udev, "ENV{%s} is not set, treat as empty\n", key_name);
2134 if (match_key(rules, cur, value))
2138 case TK_M_SUBSYSTEM:
2139 if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
2143 if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
2148 char filename[UTIL_PATH_SIZE];
2151 util_strlcpy(filename, &rules->buf[cur->key.value_off], sizeof(filename));
2152 udev_event_apply_format(event, filename, sizeof(filename));
2153 found = (wait_for_file(event->dev, filename, 10) == 0);
2154 if (!found && (cur->key.op != OP_NOMATCH))
2159 if (match_attr(rules, event->dev, event, cur) != 0)
2163 case TK_M_SUBSYSTEMS:
2169 /* get whole sequence of parent matches */
2171 while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX)
2174 /* loop over parents */
2175 event->dev_parent = event->dev;
2179 dbg(event->udev, "parent: '%s'\n", udev_device_get_syspath(event->dev_parent));
2180 /* loop over sequence of parent match keys */
2181 for (key = cur; key < next; key++ ) {
2182 dump_token(rules, key);
2185 if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
2188 case TK_M_SUBSYSTEMS:
2189 if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
2193 if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
2197 if (match_attr(rules, event->dev_parent, event, key) != 0)
2203 dbg(event->udev, "parent key matched\n");
2205 dbg(event->udev, "all parent keys matched\n");
2206 /* all keys matched */
2210 event->dev_parent = udev_device_get_parent(event->dev_parent);
2211 if (event->dev_parent == NULL)
2214 /* move behind our sequence of parent match keys */
2220 char filename[UTIL_PATH_SIZE];
2221 struct stat statbuf;
2224 util_strlcpy(filename, &rules->buf[cur->key.value_off], sizeof(filename));
2225 udev_event_apply_format(event, filename, sizeof(filename));
2226 if (util_resolve_subsys_kernel(event->udev, NULL, filename, sizeof(filename), 0) != 0)
2227 if (filename[0] != '/') {
2228 char tmp[UTIL_PATH_SIZE];
2230 util_strlcpy(tmp, udev_device_get_syspath(event->dev), sizeof(tmp));
2231 util_strlcat(tmp, "/", sizeof(tmp));
2232 util_strlcat(tmp, filename, sizeof(tmp));
2233 util_strlcpy(filename, tmp, sizeof(filename));
2236 attr_subst_subdir(filename, sizeof(filename));
2238 match = (stat(filename, &statbuf) == 0);
2239 dbg(event->udev, "'%s' %s", filename, match ? "exists\n" : "does not exist\n");
2240 if (match && cur->key.mode > 0) {
2241 match = ((statbuf.st_mode & cur->key.mode) > 0);
2242 dbg(event->udev, "'%s' has mode=%#o and %s %#o\n", filename, statbuf.st_mode,
2243 match ? "matches" : "does not match", cur->key.mode);
2245 if (match && cur->key.op == OP_NOMATCH)
2247 if (!match && cur->key.op == OP_MATCH)
2253 char program[UTIL_PATH_SIZE];
2255 char result[UTIL_PATH_SIZE];
2257 free(event->program_result);
2258 event->program_result = NULL;
2259 util_strlcpy(program, &rules->buf[cur->key.value_off], sizeof(program));
2260 udev_event_apply_format(event, program, sizeof(program));
2261 envp = udev_device_get_properties_envp(event->dev);
2262 info(event->udev, "PROGRAM '%s' %s:%u\n",
2264 &rules->buf[rule->rule.filename_off],
2265 rule->rule.filename_line);
2266 if (util_run_program(event->udev, program, envp, result, sizeof(result), NULL) != 0) {
2267 if (cur->key.op != OP_NOMATCH)
2272 util_remove_trailing_chars(result, '\n');
2273 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2274 count = udev_util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
2276 info(event->udev, "%i character(s) replaced\n" , count);
2278 event->program_result = strdup(result);
2279 dbg(event->udev, "storing result '%s'\n", event->program_result);
2280 if (cur->key.op == OP_NOMATCH)
2285 case TK_M_IMPORT_FILE:
2287 char import[UTIL_PATH_SIZE];
2289 util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));
2290 udev_event_apply_format(event, import, sizeof(import));
2291 if (import_file_into_properties(event->dev, import) != 0)
2292 if (cur->key.op != OP_NOMATCH)
2296 case TK_M_IMPORT_PROG:
2298 char import[UTIL_PATH_SIZE];
2300 util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));
2301 udev_event_apply_format(event, import, sizeof(import));
2302 info(event->udev, "IMPORT '%s' %s:%u\n",
2304 &rules->buf[rule->rule.filename_off],
2305 rule->rule.filename_line);
2306 if (import_program_into_properties(event->dev, import) != 0)
2307 if (cur->key.op != OP_NOMATCH)
2311 case TK_M_IMPORT_PARENT:
2313 char import[UTIL_PATH_SIZE];
2315 util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import));
2316 udev_event_apply_format(event, import, sizeof(import));
2317 if (import_parent_into_properties(event->dev, import) != 0)
2318 if (cur->key.op != OP_NOMATCH)
2323 if (match_key(rules, cur, event->program_result) != 0)
2327 case TK_A_IGNORE_DEVICE:
2328 event->ignore_device = 1;
2331 case TK_A_STRING_ESCAPE_NONE:
2334 case TK_A_STRING_ESCAPE_REPLACE:
2335 esc = ESCAPE_REPLACE;
2337 case TK_A_NUM_FAKE_PART:
2338 if (strcmp(udev_device_get_subsystem(event->dev), "block") != 0)
2340 if (udev_device_get_sysnum(event->dev) != NULL)
2342 udev_device_set_num_fake_partitions(event->dev, cur->key.num_fake_part);
2344 case TK_A_DEVLINK_PRIO:
2345 udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
2349 char owner[UTIL_NAME_SIZE];
2351 if (event->owner_final)
2353 if (cur->key.op == OP_ASSIGN_FINAL)
2354 event->owner_final = 1;
2355 util_strlcpy(owner, &rules->buf[cur->key.value_off], sizeof(owner));
2356 udev_event_apply_format(event, owner, sizeof(owner));
2357 event->uid = util_lookup_user(event->udev, owner);
2358 info(event->udev, "OWNER %u %s:%u\n",
2360 &rules->buf[rule->rule.filename_off],
2361 rule->rule.filename_line);
2366 char group[UTIL_NAME_SIZE];
2368 if (event->group_final)
2370 if (cur->key.op == OP_ASSIGN_FINAL)
2371 event->group_final = 1;
2372 util_strlcpy(group, &rules->buf[cur->key.value_off], sizeof(group));
2373 udev_event_apply_format(event, group, sizeof(group));
2374 event->gid = util_lookup_group(event->udev, group);
2375 info(event->udev, "GROUP %u %s:%u\n",
2377 &rules->buf[rule->rule.filename_off],
2378 rule->rule.filename_line);
2383 char mode[UTIL_NAME_SIZE];
2386 if (event->mode_final)
2388 if (cur->key.op == OP_ASSIGN_FINAL)
2389 event->mode_final = 1;
2390 util_strlcpy(mode, &rules->buf[cur->key.value_off], sizeof(mode));
2391 udev_event_apply_format(event, mode, sizeof(mode));
2392 event->mode = strtol(mode, &endptr, 8);
2393 if (endptr[0] != '\0') {
2394 err(event->udev, "invalide mode '%s' set default mode 0660\n", mode);
2397 info(event->udev, "MODE %#o %s:%u\n",
2399 &rules->buf[rule->rule.filename_off],
2400 rule->rule.filename_line);
2404 if (event->owner_final)
2406 if (cur->key.op == OP_ASSIGN_FINAL)
2407 event->owner_final = 1;
2408 event->uid = cur->key.uid;
2409 info(event->udev, "OWNER %u %s:%u\n",
2411 &rules->buf[rule->rule.filename_off],
2412 rule->rule.filename_line);
2415 if (event->group_final)
2417 if (cur->key.op == OP_ASSIGN_FINAL)
2418 event->group_final = 1;
2419 event->gid = cur->key.gid;
2420 info(event->udev, "GROUP %u %s:%u\n",
2422 &rules->buf[rule->rule.filename_off],
2423 rule->rule.filename_line);
2426 if (event->mode_final)
2428 if (cur->key.op == OP_ASSIGN_FINAL)
2429 event->mode_final = 1;
2430 event->mode = cur->key.mode;
2431 info(event->udev, "MODE %#o %s:%u\n",
2433 &rules->buf[rule->rule.filename_off],
2434 rule->rule.filename_line);
2438 const char *name = &rules->buf[cur->key.attr_off];
2439 char *value = &rules->buf[cur->key.value_off];
2441 if (value[0] != '\0') {
2442 char temp_value[UTIL_NAME_SIZE];
2443 struct udev_list_entry *entry;
2445 util_strlcpy(temp_value, value, sizeof(temp_value));
2446 udev_event_apply_format(event, temp_value, sizeof(temp_value));
2447 entry = udev_device_add_property(event->dev, name, temp_value);
2449 udev_list_entry_set_flag(entry, 1);
2451 udev_device_add_property(event->dev, name, NULL);
2457 const char *name = &rules->buf[cur->key.value_off];
2458 char name_str[UTIL_PATH_SIZE];
2461 if (event->name_final)
2463 if (cur->key.op == OP_ASSIGN_FINAL)
2464 event->name_final = 1;
2465 if (name[0] == '\0') {
2470 util_strlcpy(name_str, name, sizeof(name_str));
2471 udev_event_apply_format(event, name_str, sizeof(name_str));
2472 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2473 count = udev_util_replace_chars(name_str, "/");
2475 info(event->udev, "%i character(s) replaced\n", count);
2477 event->name = strdup(name_str);
2478 info(event->udev, "NAME '%s' %s:%u\n",
2480 &rules->buf[rule->rule.filename_off],
2481 rule->rule.filename_line);
2487 char temp[UTIL_PATH_SIZE];
2488 char filename[UTIL_PATH_SIZE];
2492 if (event->devlink_final)
2494 if (major(udev_device_get_devnum(event->dev)) == 0)
2496 if (cur->key.op == OP_ASSIGN_FINAL)
2497 event->devlink_final = 1;
2498 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2499 udev_device_cleanup_devlinks_list(event->dev);
2501 /* allow multiple symlinks separated by spaces */
2502 util_strlcpy(temp, &rules->buf[cur->key.value_off], sizeof(temp));
2503 udev_event_apply_format(event, temp, sizeof(temp));
2504 if (esc == ESCAPE_UNSET)
2505 count = udev_util_replace_chars(temp, "/ ");
2506 else if (esc == ESCAPE_REPLACE)
2507 count = udev_util_replace_chars(temp, "/");
2509 info(event->udev, "%i character(s) replaced\n" , count);
2510 dbg(event->udev, "rule applied, added symlink(s) '%s'\n", temp);
2512 while (isspace(pos[0]))
2514 next = strchr(pos, ' ');
2517 info(event->udev, "LINK '%s' %s:%u\n",
2519 &rules->buf[rule->rule.filename_off],
2520 rule->rule.filename_line);
2521 util_strlcpy(filename, udev_get_dev_path(event->udev), sizeof(filename));
2522 util_strlcat(filename, "/", sizeof(filename));
2523 util_strlcat(filename, pos, sizeof(filename));
2524 udev_device_add_devlink(event->dev, filename);
2525 while (isspace(next[1]))
2528 next = strchr(pos, ' ');
2530 if (pos[0] != '\0') {
2531 info(event->udev, "LINK '%s' %s:%u\n",
2533 &rules->buf[rule->rule.filename_off],
2534 rule->rule.filename_line);
2535 util_strlcpy(filename, udev_get_dev_path(event->udev), sizeof(filename));
2536 util_strlcat(filename, "/", sizeof(filename));
2537 util_strlcat(filename, pos, sizeof(filename));
2538 udev_device_add_devlink(event->dev, filename);
2542 case TK_A_EVENT_TIMEOUT:
2543 udev_device_set_event_timeout(event->dev, cur->key.event_timeout);
2545 case TK_A_IGNORE_REMOVE:
2546 udev_device_set_ignore_remove(event->dev, 1);
2550 const char *key_name = &rules->buf[cur->key.attr_off];
2551 char attr[UTIL_PATH_SIZE];
2552 char value[UTIL_NAME_SIZE];
2555 util_strlcpy(attr, key_name, sizeof(attr));
2556 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0) {
2557 util_strlcpy(attr, udev_device_get_syspath(event->dev), sizeof(attr));
2558 util_strlcat(attr, "/", sizeof(attr));
2559 util_strlcat(attr, key_name, sizeof(attr));
2562 attr_subst_subdir(attr, sizeof(attr));
2564 util_strlcpy(value, &rules->buf[cur->key.value_off], sizeof(value));
2565 udev_event_apply_format(event, value, sizeof(value));
2566 info(event->udev, "ATTR '%s' writing '%s' %s:%u\n", attr, value,
2567 &rules->buf[rule->rule.filename_off],
2568 rule->rule.filename_line);
2569 f = fopen(attr, "w");
2572 if (fprintf(f, "%s", value) <= 0)
2573 err(event->udev, "error writing ATTR{%s}: %m\n", attr);
2576 err(event->udev, "error opening ATTR{%s} for writing: %m\n", attr);
2582 struct udev_list_entry *list_entry;
2584 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2585 udev_list_cleanup_entries(event->udev, &event->run_list);
2586 info(event->udev, "RUN '%s' %s:%u\n",
2587 &rules->buf[cur->key.value_off],
2588 &rules->buf[rule->rule.filename_off],
2589 rule->rule.filename_line);
2590 list_entry = udev_list_entry_add(event->udev, &event->run_list,
2591 &rules->buf[cur->key.value_off], NULL, 1, 0);
2592 if (cur->key.ignore_error)
2593 udev_list_entry_set_flag(list_entry, 1);
2597 cur = &rules->tokens[cur->key.rule_goto];
2599 case TK_A_LAST_RULE:
2603 case TK_M_PARENTS_MIN:
2604 case TK_M_PARENTS_MAX:
2607 err(rules->udev, "wrong type %u\n", cur->type);
2614 /* fast-forward to next rule */
2615 cur = rule + rule->rule.token_count;
2616 dbg(rules->udev, "forward to rule: %u\n",
2617 (unsigned int) (cur - rules->tokens));