2 * Copyright (C) 2003-2010 Kay Sievers <kay.sievers@vrfy.org>
3 * Copyright (C) 2008 Alan Jenkins <alan-jenkins@tuffmail.co.uk>
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
35 #define PREALLOC_TOKEN 2048
36 #define PREALLOC_STRBUF 32 * 1024
37 #define PREALLOC_TRIE 256
40 unsigned int name_off;
48 /* this node's first child */
49 unsigned int child_idx;
50 /* the next child of our parent node's child list */
51 unsigned int next_child_idx;
52 /* this node's last child (shortcut for append) */
53 unsigned int last_child_idx;
54 unsigned int value_off;
55 unsigned short value_len;
63 /* every key in the rules file becomes a token */
65 unsigned int token_cur;
66 unsigned int token_max;
68 /* all key strings are copied to a single string buffer */
72 unsigned int buf_count;
74 /* during rule parsing, strings are indexed to find duplicates */
75 struct trie_node *trie_nodes;
76 unsigned int trie_nodes_cur;
77 unsigned int trie_nodes_max;
79 /* during rule parsing, uid/gid lookup results are cached */
81 unsigned int uids_cur;
82 unsigned int uids_max;
84 unsigned int gids_cur;
85 unsigned int gids_max;
88 /* KEY=="", KEY!="", KEY+="", KEY="", KEY:="" */
101 enum string_glob_type {
103 GL_PLAIN, /* no special chars */
104 GL_GLOB, /* shell globs ?,*,[] */
105 GL_SPLIT, /* multi-value A|B */
106 GL_SPLIT_GLOB, /* multi-value with glob A*|B* */
107 GL_SOMETHING, /* commonly used "?*" */
110 enum string_subst_type {
117 /* tokens of a rule are sorted/handled in this order */
122 TK_M_ACTION, /* val */
123 TK_M_DEVPATH, /* val */
124 TK_M_KERNEL, /* val */
125 TK_M_DEVLINK, /* val */
127 TK_M_ENV, /* val, attr */
128 TK_M_SUBSYSTEM, /* val */
129 TK_M_DRIVER, /* val */
130 TK_M_WAITFOR, /* val */
131 TK_M_ATTR, /* val, attr */
134 TK_M_KERNELS, /* val */
135 TK_M_SUBSYSTEMS, /* val */
136 TK_M_DRIVERS, /* val */
137 TK_M_ATTRS, /* val, attr */
140 TK_M_TEST, /* val, mode_t */
141 TK_M_PROGRAM, /* val */
142 TK_M_IMPORT_FILE, /* val */
143 TK_M_IMPORT_PROG, /* val */
144 TK_M_IMPORT_DB, /* val */
145 TK_M_IMPORT_PARENT, /* val */
146 TK_M_RESULT, /* val */
149 TK_A_STRING_ESCAPE_NONE,
150 TK_A_STRING_ESCAPE_REPLACE,
151 TK_A_INOTIFY_WATCH, /* int */
152 TK_A_NUM_FAKE_PART, /* int */
153 TK_A_DEVLINK_PRIO, /* int */
154 TK_A_OWNER, /* val */
155 TK_A_GROUP, /* val */
157 TK_A_OWNER_ID, /* uid_t */
158 TK_A_GROUP_ID, /* gid_t */
159 TK_A_MODE_ID, /* mode_t */
160 TK_A_ENV, /* val, attr */
162 TK_A_DEVLINK, /* val */
163 TK_A_EVENT_TIMEOUT, /* int */
165 TK_A_ATTR, /* val, attr */
166 TK_A_RUN, /* val, bool */
167 TK_A_GOTO, /* size_t */
172 /* we try to pack stuff in a way that we take only 12 bytes per token */
175 unsigned char type; /* same as in rule and key */
177 enum token_type type:8;
178 unsigned int flags:8;
179 unsigned short token_count;
180 unsigned int label_off;
181 unsigned short filename_off;
182 unsigned short filename_line;
185 enum token_type type:8;
186 enum operation_type op:8;
187 enum string_glob_type glob:8;
188 enum string_subst_type subst:4;
189 enum string_subst_type attrsubst:4;
190 unsigned int value_off;
192 unsigned int attr_off;
195 unsigned int rule_goto;
210 struct udev_rules *rules;
212 struct token token[MAX_TK];
213 unsigned int token_cur;
217 static const char *operation_str(enum operation_type type)
219 static const char *operation_strs[] = {
220 [OP_UNSET] = "UNSET",
221 [OP_MATCH] = "match",
222 [OP_NOMATCH] = "nomatch",
223 [OP_MATCH_MAX] = "MATCH_MAX",
226 [OP_ASSIGN] = "assign",
227 [OP_ASSIGN_FINAL] = "assign-final",
230 return operation_strs[type];
233 static const char *string_glob_str(enum string_glob_type type)
235 static const char *string_glob_strs[] = {
236 [GL_UNSET] = "UNSET",
237 [GL_PLAIN] = "plain",
239 [GL_SPLIT] = "split",
240 [GL_SPLIT_GLOB] = "split-glob",
241 [GL_SOMETHING] = "split-glob",
244 return string_glob_strs[type];
247 static const char *token_str(enum token_type type)
249 static const char *token_strs[] = {
250 [TK_UNSET] = "UNSET",
253 [TK_M_ACTION] = "M ACTION",
254 [TK_M_DEVPATH] = "M DEVPATH",
255 [TK_M_KERNEL] = "M KERNEL",
256 [TK_M_DEVLINK] = "M DEVLINK",
257 [TK_M_NAME] = "M NAME",
258 [TK_M_ENV] = "M ENV",
259 [TK_M_SUBSYSTEM] = "M SUBSYSTEM",
260 [TK_M_DRIVER] = "M DRIVER",
261 [TK_M_WAITFOR] = "M WAITFOR",
262 [TK_M_ATTR] = "M ATTR",
264 [TK_M_PARENTS_MIN] = "M PARENTS_MIN",
265 [TK_M_KERNELS] = "M KERNELS",
266 [TK_M_SUBSYSTEMS] = "M SUBSYSTEMS",
267 [TK_M_DRIVERS] = "M DRIVERS",
268 [TK_M_ATTRS] = "M ATTRS",
269 [TK_M_PARENTS_MAX] = "M PARENTS_MAX",
271 [TK_M_TEST] = "M TEST",
272 [TK_M_PROGRAM] = "M PROGRAM",
273 [TK_M_IMPORT_FILE] = "M IMPORT_FILE",
274 [TK_M_IMPORT_PROG] = "M IMPORT_PROG",
275 [TK_M_IMPORT_DB] = "M IMPORT_DB",
276 [TK_M_IMPORT_PARENT] = "M IMPORT_PARENT",
277 [TK_M_RESULT] = "M RESULT",
278 [TK_M_MAX] = "M MAX",
280 [TK_A_STRING_ESCAPE_NONE] = "A STRING_ESCAPE_NONE",
281 [TK_A_STRING_ESCAPE_REPLACE] = "A STRING_ESCAPE_REPLACE",
282 [TK_A_INOTIFY_WATCH] = "A INOTIFY_WATCH",
283 [TK_A_NUM_FAKE_PART] = "A NUM_FAKE_PART",
284 [TK_A_DEVLINK_PRIO] = "A DEVLINK_PRIO",
285 [TK_A_OWNER] = "A OWNER",
286 [TK_A_GROUP] = "A GROUP",
287 [TK_A_MODE] = "A MODE",
288 [TK_A_OWNER_ID] = "A OWNER_ID",
289 [TK_A_GROUP_ID] = "A GROUP_ID",
290 [TK_A_MODE_ID] = "A MODE_ID",
291 [TK_A_ENV] = "A ENV",
292 [TK_A_NAME] = "A NAME",
293 [TK_A_DEVLINK] = "A DEVLINK",
294 [TK_A_EVENT_TIMEOUT] = "A EVENT_TIMEOUT",
295 [TK_A_IGNORE_REMOVE] = "A IGNORE_REMOVE",
296 [TK_A_ATTR] = "A ATTR",
297 [TK_A_RUN] = "A RUN",
298 [TK_A_GOTO] = "A GOTO",
303 return token_strs[type];
306 static void dump_token(struct udev_rules *rules, struct token *token)
308 enum token_type type = token->type;
309 enum operation_type op = token->key.op;
310 enum string_glob_type glob = token->key.glob;
311 const char *value = &rules->buf[token->key.value_off];
312 const char *attr = &rules->buf[token->key.attr_off];
317 const char *tks_ptr = (char *)rules->tokens;
318 const char *tk_ptr = (char *)token;
319 unsigned int idx = (tk_ptr - tks_ptr) / sizeof(struct token);
321 dbg(rules->udev, "* RULE %s:%u, token: %u, count: %u, label: '%s', flags: 0x%02x\n",
322 &rules->buf[token->rule.filename_off], token->rule.filename_line,
323 idx, token->rule.token_count,
324 &rules->buf[token->rule.label_off],
337 case TK_M_SUBSYSTEMS:
340 case TK_M_IMPORT_FILE:
341 case TK_M_IMPORT_PROG:
343 case TK_M_IMPORT_PARENT:
351 dbg(rules->udev, "%s %s '%s'(%s)\n",
352 token_str(type), operation_str(op), value, string_glob_str(glob));
359 dbg(rules->udev, "%s %s '%s' '%s'(%s)\n",
360 token_str(type), operation_str(op), attr, value, string_glob_str(glob));
362 case TK_A_STRING_ESCAPE_NONE:
363 case TK_A_STRING_ESCAPE_REPLACE:
364 case TK_A_IGNORE_REMOVE:
365 dbg(rules->udev, "%s\n", token_str(type));
368 dbg(rules->udev, "%s %s '%s'(%s) %#o\n",
369 token_str(type), operation_str(op), value, string_glob_str(glob), token->key.mode);
371 case TK_A_INOTIFY_WATCH:
372 dbg(rules->udev, "%s %u\n", token_str(type), token->key.watch);
374 case TK_A_NUM_FAKE_PART:
375 dbg(rules->udev, "%s %u\n", token_str(type), token->key.num_fake_part);
377 case TK_A_DEVLINK_PRIO:
378 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.devlink_prio);
381 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.uid);
384 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.gid);
387 dbg(rules->udev, "%s %s %#o\n", token_str(type), operation_str(op), token->key.mode);
389 case TK_A_EVENT_TIMEOUT:
390 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.event_timeout);
393 dbg(rules->udev, "%s '%s' %u\n", token_str(type), value, token->key.rule_goto);
396 dbg(rules->udev, "* %s\n", token_str(type));
398 case TK_M_PARENTS_MIN:
399 case TK_M_PARENTS_MAX:
402 dbg(rules->udev, "unknown type %u\n", type);
407 static void dump_rules(struct udev_rules *rules)
411 dbg(rules->udev, "dumping %u (%zu bytes) tokens, %u (%zu bytes) strings\n",
413 rules->token_cur * sizeof(struct token),
416 for(i = 0; i < rules->token_cur; i++)
417 dump_token(rules, &rules->tokens[i]);
420 static inline const char *operation_str(enum operation_type type) { return NULL; }
421 static inline const char *token_str(enum token_type type) { return NULL; }
422 static inline void dump_token(struct udev_rules *rules, struct token *token) {}
423 static inline void dump_rules(struct udev_rules *rules) {}
424 #endif /* ENABLE_DEBUG */
426 static int add_new_string(struct udev_rules *rules, const char *str, size_t bytes)
430 /* grow buffer if needed */
431 if (rules->buf_cur + bytes+1 >= rules->buf_max) {
435 /* double the buffer size */
436 add = rules->buf_max;
440 buf = realloc(rules->buf, rules->buf_max + add);
443 dbg(rules->udev, "extend buffer from %zu to %zu\n", rules->buf_max, rules->buf_max + add);
445 rules->buf_max += add;
447 off = rules->buf_cur;
448 memcpy(&rules->buf[rules->buf_cur], str, bytes);
449 rules->buf_cur += bytes;
454 static int add_string(struct udev_rules *rules, const char *str)
456 unsigned int node_idx;
457 struct trie_node *new_node;
458 unsigned int new_node_idx;
463 struct trie_node *parent;
465 /* walk trie, start from last character of str to find matching tails */
469 for (depth = 0; depth <= len; depth++) {
470 struct trie_node *node;
471 unsigned int child_idx;
473 node = &rules->trie_nodes[node_idx];
474 off = node->value_off + node->value_len - len;
476 /* match against current node */
477 if (depth == len || (node->value_len >= len && memcmp(&rules->buf[off], str, len) == 0))
480 /* lookup child node */
481 key = str[len - 1 - depth];
482 child_idx = node->child_idx;
483 while (child_idx > 0) {
484 struct trie_node *child;
486 child = &rules->trie_nodes[child_idx];
487 if (child->key == key)
489 child_idx = child->next_child_idx;
493 node_idx = child_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;
519 new_node_idx = rules->trie_nodes_cur;
520 rules->trie_nodes_cur++;
521 new_node = &rules->trie_nodes[new_node_idx];
522 memset(new_node, 0x00, sizeof(struct trie_node));
523 new_node->value_off = off;
524 new_node->value_len = len;
527 /* join the parent's child list */
528 parent = &rules->trie_nodes[node_idx];
529 if (parent->child_idx == 0) {
530 parent->child_idx = new_node_idx;
532 struct trie_node *last_child;
534 last_child = &rules->trie_nodes[parent->last_child_idx];
535 last_child->next_child_idx = new_node_idx;
537 parent->last_child_idx = new_node_idx;
541 static int add_token(struct udev_rules *rules, struct token *token)
543 /* grow buffer if needed */
544 if (rules->token_cur+1 >= rules->token_max) {
545 struct token *tokens;
548 /* double the buffer size */
549 add = rules->token_max;
553 tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
556 dbg(rules->udev, "extend tokens from %u to %u\n", rules->token_max, rules->token_max + add);
557 rules->tokens = tokens;
558 rules->token_max += add;
560 memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
565 static uid_t add_uid(struct udev_rules *rules, const char *owner)
571 /* lookup, if we know it already */
572 for (i = 0; i < rules->uids_cur; i++) {
573 off = rules->uids[i].name_off;
574 if (strcmp(&rules->buf[off], owner) == 0) {
575 uid = rules->uids[i].uid;
576 dbg(rules->udev, "return existing %u for '%s'\n", uid, owner);
580 uid = util_lookup_user(rules->udev, owner);
582 /* grow buffer if needed */
583 if (rules->uids_cur+1 >= rules->uids_max) {
584 struct uid_gid *uids;
587 /* double the buffer size */
588 add = rules->uids_max;
592 uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
595 dbg(rules->udev, "extend uids from %u to %u\n", rules->uids_max, rules->uids_max + add);
597 rules->uids_max += add;
599 rules->uids[rules->uids_cur].uid = uid;
600 off = add_string(rules, owner);
603 rules->uids[rules->uids_cur].name_off = off;
608 static gid_t add_gid(struct udev_rules *rules, const char *group)
614 /* lookup, if we know it already */
615 for (i = 0; i < rules->gids_cur; i++) {
616 off = rules->gids[i].name_off;
617 if (strcmp(&rules->buf[off], group) == 0) {
618 gid = rules->gids[i].gid;
619 dbg(rules->udev, "return existing %u for '%s'\n", gid, group);
623 gid = util_lookup_group(rules->udev, group);
625 /* grow buffer if needed */
626 if (rules->gids_cur+1 >= rules->gids_max) {
627 struct uid_gid *gids;
630 /* double the buffer size */
631 add = rules->gids_max;
635 gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid));
638 dbg(rules->udev, "extend gids from %u to %u\n", rules->gids_max, rules->gids_max + add);
640 rules->gids_max += add;
642 rules->gids[rules->gids_cur].gid = gid;
643 off = add_string(rules, group);
646 rules->gids[rules->gids_cur].name_off = off;
651 static int import_property_from_string(struct udev_device *dev, char *line)
653 struct udev *udev = udev_device_get_udev(dev);
660 while (isspace(key[0]))
663 /* comment or empty line */
664 if (key[0] == '#' || key[0] == '\0')
667 /* split key/value */
668 val = strchr(key, '=');
675 while (isspace(val[0]))
682 while (isspace(key[len-1]))
686 /* terminate value */
690 while (isspace(val[len-1]))
698 if (val[0] == '"' || val[0] == '\'') {
699 if (val[len-1] != val[0]) {
700 info(udev, "inconsistent quoting: '%s', skip\n", line);
707 dbg(udev, "adding '%s'='%s'\n", key, val);
709 /* handle device, renamed by external tool, returning new path */
710 if (strcmp(key, "DEVPATH") == 0) {
711 char syspath[UTIL_PATH_SIZE];
713 info(udev, "updating devpath from '%s' to '%s'\n",
714 udev_device_get_devpath(dev), val);
715 util_strscpyl(syspath, sizeof(syspath), udev_get_sys_path(udev), val, NULL);
716 udev_device_set_syspath(dev, syspath);
718 struct udev_list_entry *entry;
720 entry = udev_device_add_property(dev, key, val);
721 /* store in db, skip private keys */
723 udev_list_entry_set_flags(entry, 1);
728 static int import_file_into_properties(struct udev_device *dev, const char *filename)
731 char line[UTIL_LINE_SIZE];
733 f = fopen(filename, "r");
736 while (fgets(line, sizeof(line), f) != NULL)
737 import_property_from_string(dev, line);
742 static int import_program_into_properties(struct udev_device *dev, const char *program)
744 struct udev *udev = udev_device_get_udev(dev);
750 envp = udev_device_get_properties_envp(dev);
751 if (util_run_program(udev, program, envp, result, sizeof(result), &reslen, NULL) != 0)
755 while (line != NULL) {
758 pos = strchr(line, '\n');
763 import_property_from_string(dev, line);
769 static int import_parent_into_properties(struct udev_device *dev, const char *filter)
771 struct udev *udev = udev_device_get_udev(dev);
772 struct udev_device *dev_parent;
773 struct udev_list_entry *list_entry;
775 dev_parent = udev_device_get_parent(dev);
776 if (dev_parent == NULL)
779 dbg(udev, "found parent '%s', get the node name\n", udev_device_get_syspath(dev_parent));
780 udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
781 const char *key = udev_list_entry_get_name(list_entry);
782 const char *val = udev_list_entry_get_value(list_entry);
784 if (fnmatch(filter, key, 0) == 0) {
785 struct udev_list_entry *entry;
787 dbg(udev, "import key '%s=%s'\n", key, val);
788 entry = udev_device_add_property(dev, key, val);
789 /* store in db, skip private keys */
791 udev_list_entry_set_flags(entry, 1);
797 #define WAIT_LOOP_PER_SECOND 50
798 static int wait_for_file(struct udev_device *dev, const char *file, int timeout)
800 struct udev *udev = udev_device_get_udev(dev);
801 char filepath[UTIL_PATH_SIZE];
802 char devicepath[UTIL_PATH_SIZE];
804 int loop = timeout * WAIT_LOOP_PER_SECOND;
806 /* a relative path is a device attribute */
807 devicepath[0] = '\0';
808 if (file[0] != '/') {
809 util_strscpyl(devicepath, sizeof(devicepath),
810 udev_get_sys_path(udev), udev_device_get_devpath(dev), NULL);
811 util_strscpyl(filepath, sizeof(filepath), devicepath, "/", file, NULL);
815 dbg(udev, "will wait %i sec for '%s'\n", timeout, file);
817 const struct timespec duration = { 0, 1000 * 1000 * 1000 / WAIT_LOOP_PER_SECOND };
820 if (stat(file, &stats) == 0) {
821 info(udev, "file '%s' appeared after %i loops\n", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
824 /* make sure, the device did not disappear in the meantime */
825 if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
826 info(udev, "device disappeared while waiting for '%s'\n", file);
829 info(udev, "wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND);
830 nanosleep(&duration, NULL);
832 info(udev, "waiting for '%s' failed\n", file);
836 static int attr_subst_subdir(char *attr, size_t len)
840 if (strstr(attr, "/*/")) {
842 char dirname[UTIL_PATH_SIZE];
846 util_strscpy(dirname, sizeof(dirname), attr);
847 pos = strstr(dirname, "/*/");
852 dir = opendir(dirname);
856 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
859 if (dent->d_name[0] == '.')
861 util_strscpyl(attr, len, dirname, "/", dent->d_name, tail, NULL);
862 if (stat(attr, &stats) == 0) {
874 static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value)
880 if (linepos == NULL || linepos[0] == '\0')
883 /* skip whitespace */
884 while (isspace(linepos[0]) || linepos[0] == ',')
888 if (linepos[0] == '\0')
894 if (linepos[0] == '\0')
896 if (isspace(linepos[0]))
898 if (linepos[0] == '=')
900 if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
901 if (linepos[1] == '=')
905 /* remember end of key */
908 /* skip whitespace after key */
909 while (isspace(linepos[0]))
911 if (linepos[0] == '\0')
914 /* get operation type */
915 if (linepos[0] == '=' && linepos[1] == '=') {
918 } else if (linepos[0] == '!' && linepos[1] == '=') {
921 } else if (linepos[0] == '+' && linepos[1] == '=') {
924 } else if (linepos[0] == '=') {
927 } else if (linepos[0] == ':' && linepos[1] == '=') {
928 *op = OP_ASSIGN_FINAL;
936 /* skip whitespace after operator */
937 while (isspace(linepos[0]))
939 if (linepos[0] == '\0')
943 if (linepos[0] == '"')
950 temp = strchr(linepos, '"');
955 dbg(udev, "%s '%s'-'%s'\n", operation_str(*op), *key, *value);
957 /* move line to next key */
962 /* extract possible KEY{attr} */
963 static char *get_key_attribute(struct udev *udev, char *str)
968 attr = strchr(str, '{');
971 pos = strchr(attr, '}');
973 err(udev, "missing closing brace for format\n");
977 dbg(udev, "attribute='%s'\n", attr);
983 static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
984 enum operation_type op,
985 const char *value, const void *data)
987 struct token *token = &rule_tmp->token[rule_tmp->token_cur];
988 const char *attr = NULL;
990 memset(token, 0x00, sizeof(struct token));
1002 case TK_M_SUBSYSTEMS:
1005 case TK_M_IMPORT_FILE:
1006 case TK_M_IMPORT_PROG:
1007 case TK_M_IMPORT_DB:
1008 case TK_M_IMPORT_PARENT:
1015 token->key.value_off = add_string(rule_tmp->rules, value);
1023 token->key.value_off = add_string(rule_tmp->rules, value);
1024 token->key.attr_off = add_string(rule_tmp->rules, attr);
1027 token->key.value_off = add_string(rule_tmp->rules, value);
1028 token->key.devlink_unique = *(int *)data;
1031 token->key.value_off = add_string(rule_tmp->rules, value);
1033 token->key.mode = *(mode_t *)data;
1035 case TK_A_STRING_ESCAPE_NONE:
1036 case TK_A_STRING_ESCAPE_REPLACE:
1037 case TK_A_IGNORE_REMOVE:
1040 token->key.value_off = add_string(rule_tmp->rules, value);
1041 token->key.fail_on_error = *(int *)data;
1043 case TK_A_INOTIFY_WATCH:
1044 case TK_A_NUM_FAKE_PART:
1045 case TK_A_DEVLINK_PRIO:
1046 token->key.devlink_prio = *(int *)data;
1049 token->key.uid = *(uid_t *)data;
1052 token->key.gid = *(gid_t *)data;
1055 token->key.mode = *(mode_t *)data;
1057 case TK_A_EVENT_TIMEOUT:
1058 token->key.event_timeout = *(int *)data;
1061 case TK_M_PARENTS_MIN:
1062 case TK_M_PARENTS_MAX:
1066 err(rule_tmp->rules->udev, "wrong type %u\n", type);
1070 if (value != NULL && type < TK_M_MAX) {
1071 /* check if we need to split or call fnmatch() while matching rules */
1072 enum string_glob_type glob;
1076 has_split = (strchr(value, '|') != NULL);
1077 has_glob = (strchr(value, '*') != NULL || strchr(value, '?') != NULL || strchr(value, '[') != NULL);
1078 if (has_split && has_glob) {
1079 glob = GL_SPLIT_GLOB;
1080 } else if (has_split) {
1082 } else if (has_glob) {
1083 if (strcmp(value, "?*") == 0)
1084 glob = GL_SOMETHING;
1090 token->key.glob = glob;
1093 if (value != NULL && type > TK_M_MAX) {
1094 /* check if assigned value has substitution chars */
1095 if (value[0] == '[')
1096 token->key.subst = SB_SUBSYS;
1097 else if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
1098 token->key.subst = SB_FORMAT;
1100 token->key.subst = SB_NONE;
1104 /* check if property/attribut name has substitution chars */
1106 token->key.attrsubst = SB_SUBSYS;
1107 else if (strchr(attr, '%') != NULL || strchr(attr, '$') != NULL)
1108 token->key.attrsubst = SB_FORMAT;
1110 token->key.attrsubst = SB_NONE;
1113 token->key.type = type;
1115 rule_tmp->token_cur++;
1116 if (rule_tmp->token_cur >= ARRAY_SIZE(rule_tmp->token)) {
1117 err(rule_tmp->rules->udev, "temporary rule array too small\n");
1123 static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp)
1126 unsigned int start = 0;
1127 unsigned int end = rule_tmp->token_cur;
1129 for (i = 0; i < rule_tmp->token_cur; i++) {
1130 enum token_type next_val = TK_UNSET;
1131 unsigned int next_idx = 0;
1134 /* find smallest value */
1135 for (j = start; j < end; j++) {
1136 if (rule_tmp->token[j].type == TK_UNSET)
1138 if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
1139 next_val = rule_tmp->token[j].type;
1144 /* add token and mark done */
1145 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
1147 rule_tmp->token[next_idx].type = TK_UNSET;
1150 if (next_idx == start)
1152 if (next_idx+1 == end)
1158 static int add_rule(struct udev_rules *rules, char *line,
1159 const char *filename, unsigned int filename_off, unsigned int lineno)
1163 struct rule_tmp rule_tmp;
1164 bool bus_warn = false;
1165 bool sysfs_warn = false;
1166 bool id_warn = false;
1168 memset(&rule_tmp, 0x00, sizeof(struct rule_tmp));
1169 rule_tmp.rules = rules;
1170 rule_tmp.rule.type = TK_RULE;
1171 rule_tmp.rule.rule.filename_off = filename_off;
1172 rule_tmp.rule.rule.filename_line = lineno;
1178 enum operation_type op;
1180 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0)
1183 if (strcmp(key, "ACTION") == 0) {
1184 if (op > OP_MATCH_MAX) {
1185 err(rules->udev, "invalid ACTION operation\n");
1188 rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL);
1192 if (strcmp(key, "DEVPATH") == 0) {
1193 if (op > OP_MATCH_MAX) {
1194 err(rules->udev, "invalid DEVPATH operation\n");
1197 rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
1201 if (strcmp(key, "KERNEL") == 0) {
1202 if (op > OP_MATCH_MAX) {
1203 err(rules->udev, "invalid KERNEL operation\n");
1206 rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL);
1210 if (strcmp(key, "SUBSYSTEM") == 0) {
1211 if (op > OP_MATCH_MAX) {
1212 err(rules->udev, "invalid SUBSYSTEM operation\n");
1215 /* bus, class, subsystem events should all be the same */
1216 if (strcmp(value, "subsystem") == 0 ||
1217 strcmp(value, "bus") == 0 ||
1218 strcmp(value, "class") == 0) {
1219 if (strcmp(value, "bus") == 0 || strcmp(value, "class") == 0)
1220 err(rules->udev, "'%s' must be specified as 'subsystem' \n"
1221 "please fix it in %s:%u", value, filename, lineno);
1222 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
1224 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
1228 if (strcmp(key, "DRIVER") == 0) {
1229 if (op > OP_MATCH_MAX) {
1230 err(rules->udev, "invalid DRIVER operation\n");
1233 rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL);
1237 if (strncmp(key, "ATTR{", sizeof("ATTR{")-1) == 0) {
1238 attr = get_key_attribute(rules->udev, key + sizeof("ATTR")-1);
1240 err(rules->udev, "error parsing ATTR attribute\n");
1243 if (op < OP_MATCH_MAX) {
1244 rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
1246 rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr);
1251 if (strcmp(key, "KERNELS") == 0) {
1252 if (op > OP_MATCH_MAX) {
1253 err(rules->udev, "invalid KERNELS operation\n");
1256 rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1260 if (strcmp(key, "ID") == 0) {
1263 err(rules->udev, "ID= will be removed in a future udev version, "
1264 "please use KERNEL= to match the event device, or KERNELS= "
1265 "to match a parent device, in %s:%u\n", filename, lineno);
1267 if (op > OP_MATCH_MAX) {
1268 err(rules->udev, "invalid KERNELS operation\n");
1271 rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1275 if (strcmp(key, "SUBSYSTEMS") == 0) {
1276 if (op > OP_MATCH_MAX) {
1277 err(rules->udev, "invalid SUBSYSTEMS operation\n");
1280 rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1284 if (strcmp(key, "BUS") == 0) {
1287 err(rules->udev, "BUS= will be removed in a future udev version, "
1288 "please use SUBSYSTEM= to match the event device, or SUBSYSTEMS= "
1289 "to match a parent device, in %s:%u\n", filename, lineno);
1291 if (op > OP_MATCH_MAX) {
1292 err(rules->udev, "invalid SUBSYSTEMS operation\n");
1295 rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1299 if (strcmp(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);
1308 if (strncmp(key, "ATTRS{", sizeof("ATTRS{")-1) == 0) {
1309 if (op > OP_MATCH_MAX) {
1310 err(rules->udev, "invalid ATTRS operation\n");
1313 attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
1315 err(rules->udev, "error parsing ATTRS attribute\n");
1318 if (strncmp(attr, "device/", 7) == 0)
1319 err(rules->udev, "the 'device' link may not be available in a future kernel, "
1320 "please fix it in %s:%u", filename, lineno);
1321 else if (strstr(attr, "../") != NULL)
1322 err(rules->udev, "do not reference parent sysfs directories directly, "
1323 "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
1324 rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1328 if (strncmp(key, "SYSFS{", sizeof("SYSFS{")-1) == 0) {
1331 err(rules->udev, "SYSFS{}= will be removed in a future udev version, "
1332 "please use ATTR{}= to match the event device, or ATTRS{}= "
1333 "to match a parent device, in %s:%u\n", filename, lineno);
1335 if (op > OP_MATCH_MAX) {
1336 err(rules->udev, "invalid ATTRS operation\n");
1339 attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
1341 err(rules->udev, "error parsing ATTRS attribute\n");
1344 rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1348 if (strncmp(key, "ENV{", sizeof("ENV{")-1) == 0) {
1349 attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1);
1351 err(rules->udev, "error parsing ENV attribute\n");
1354 if (op < OP_MATCH_MAX) {
1355 if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
1358 if (rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
1364 if (strcmp(key, "PROGRAM") == 0) {
1365 rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
1369 if (strcmp(key, "RESULT") == 0) {
1370 if (op > OP_MATCH_MAX) {
1371 err(rules->udev, "invalid RESULT operation\n");
1374 rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL);
1378 if (strncmp(key, "IMPORT", sizeof("IMPORT")-1) == 0) {
1379 attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1);
1380 if (attr != NULL && strstr(attr, "program")) {
1381 dbg(rules->udev, "IMPORT will be executed\n");
1382 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1383 } else if (attr != NULL && strstr(attr, "file")) {
1384 dbg(rules->udev, "IMPORT will be included as file\n");
1385 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1386 } else if (attr != NULL && strstr(attr, "db")) {
1387 dbg(rules->udev, "IMPORT will include db values\n");
1388 rule_add_key(&rule_tmp, TK_M_IMPORT_DB, op, value, NULL);
1389 } else if (attr != NULL && strstr(attr, "parent")) {
1390 dbg(rules->udev, "IMPORT will include the parent values\n");
1391 rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
1393 /* figure it out if it is executable */
1394 char file[UTIL_PATH_SIZE];
1396 struct stat statbuf;
1398 /* allow programs in /lib/udev called without the path */
1399 if (value[0] != '/')
1400 util_strscpyl(file, sizeof(file), LIBEXECDIR "/", value, NULL);
1402 util_strscpy(file, sizeof(file), value);
1403 pos = strchr(file, ' ');
1406 dbg(rules->udev, "IMPORT auto mode for '%s'\n", file);
1407 if (stat(file, &statbuf) == 0 && (statbuf.st_mode & S_IXUSR)) {
1408 dbg(rules->udev, "IMPORT will be executed (autotype)\n");
1409 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1411 dbg(rules->udev, "IMPORT will be included as file (autotype)\n");
1412 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1418 if (strncmp(key, "TEST", sizeof("TEST")-1) == 0) {
1421 if (op > OP_MATCH_MAX) {
1422 err(rules->udev, "invalid TEST operation\n");
1425 attr = get_key_attribute(rules->udev, key + sizeof("TEST")-1);
1427 mode = strtol(attr, NULL, 8);
1428 rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode);
1430 rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL);
1435 if (strncmp(key, "RUN", sizeof("RUN")-1) == 0) {
1438 attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1);
1439 if (attr != NULL && strstr(attr, "fail_event_on_error"))
1441 rule_add_key(&rule_tmp, TK_A_RUN, op, value, &flag);
1445 if (strcmp(key, "WAIT_FOR") == 0 || strcmp(key, "WAIT_FOR_SYSFS") == 0) {
1446 rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1450 if (strcmp(key, "LABEL") == 0) {
1451 rule_tmp.rule.rule.label_off = add_string(rules, value);
1455 if (strcmp(key, "GOTO") == 0) {
1456 rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1460 if (strncmp(key, "NAME", sizeof("NAME")-1) == 0) {
1461 if (op < OP_MATCH_MAX) {
1462 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
1464 if (value[0] == '\0')
1465 info(rules->udev, "name empty, node creation suppressed\n");
1466 else if (strcmp(value, "%k") == 0)
1467 err(rules->udev, "NAME=\"%%k\" is superfluous and breaks "
1468 "kernel supplied names, please remove it from %s:%u\n", filename, lineno);
1469 rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL);
1470 attr = get_key_attribute(rules->udev, key + sizeof("NAME")-1);
1472 if (strstr(attr, "all_partitions") != NULL) {
1473 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1475 dbg(rules->udev, "creation of partition nodes requested\n");
1476 rule_add_key(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1478 if (strstr(attr, "ignore_remove") != NULL) {
1479 dbg(rules->udev, "remove event should be ignored\n");
1480 rule_add_key(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1484 rule_tmp.rule.rule.flags = 1;
1488 if (strncmp(key, "SYMLINK", sizeof("SYMLINK")-1) == 0) {
1489 if (op < OP_MATCH_MAX) {
1490 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
1494 attr = get_key_attribute(rules->udev, key + sizeof("SYMLINK")-1);
1495 if (attr != NULL && strstr(attr, "unique") != NULL)
1497 rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, &flag);
1499 rule_tmp.rule.rule.flags = 1;
1503 if (strcmp(key, "OWNER") == 0) {
1507 uid = strtoul(value, &endptr, 10);
1508 if (endptr[0] == '\0') {
1509 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1510 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1511 uid = add_uid(rules, value);
1512 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1513 } else if (rules->resolve_names >= 0) {
1514 rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
1516 rule_tmp.rule.rule.flags = 1;
1520 if (strcmp(key, "GROUP") == 0) {
1524 gid = strtoul(value, &endptr, 10);
1525 if (endptr[0] == '\0') {
1526 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1527 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1528 gid = add_gid(rules, value);
1529 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1530 } else if (rules->resolve_names >= 0) {
1531 rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
1533 rule_tmp.rule.rule.flags = 1;
1537 if (strcmp(key, "MODE") == 0) {
1541 mode = strtol(value, &endptr, 8);
1542 if (endptr[0] == '\0')
1543 rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1545 rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
1546 rule_tmp.rule.rule.flags = 1;
1550 if (strcmp(key, "OPTIONS") == 0) {
1553 if (strstr(value, "ignore_remove") != NULL) {
1554 dbg(rules->udev, "remove event should be ignored\n");
1555 rule_add_key(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1557 pos = strstr(value, "link_priority=");
1559 int prio = atoi(&pos[strlen("link_priority=")]);
1561 rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, 0, NULL, &prio);
1562 dbg(rules->udev, "link priority=%i\n", prio);
1564 pos = strstr(value, "event_timeout=");
1566 int tout = atoi(&pos[strlen("event_timeout=")]);
1568 rule_add_key(&rule_tmp, TK_A_EVENT_TIMEOUT, 0, NULL, &tout);
1569 dbg(rules->udev, "event timeout=%i\n", tout);
1571 pos = strstr(value, "string_escape=");
1573 pos = &pos[strlen("string_escape=")];
1574 if (strncmp(pos, "none", strlen("none")) == 0)
1575 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, 0, NULL, NULL);
1576 else if (strncmp(pos, "replace", strlen("replace")) == 0)
1577 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, 0, NULL, NULL);
1579 if (strstr(value, "all_partitions") != NULL) {
1580 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1582 rule_add_key(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1583 dbg(rules->udev, "creation of partition nodes requested\n");
1585 pos = strstr(value, "nowatch");
1589 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, 0, NULL, &off);
1590 dbg(rules->udev, "inotify watch of device disabled\n");
1592 pos = strstr(value, "watch");
1596 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, 0, NULL, &on);
1597 dbg(rules->udev, "inotify watch of device requested\n");
1602 err(rules->udev, "unknown key '%s' in %s:%u\n", key, filename, lineno);
1605 /* add rule token */
1606 rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur;
1607 if (add_token(rules, &rule_tmp.rule) != 0)
1610 /* add tokens to list, sorted by type */
1611 if (sort_token(rules, &rule_tmp) != 0)
1616 err(rules->udev, "invalid rule '%s:%u'\n", filename, lineno);
1620 static int parse_file(struct udev_rules *rules, const char *filename, unsigned short filename_off)
1623 unsigned int first_token;
1624 char line[UTIL_LINE_SIZE];
1628 info(rules->udev, "reading '%s' as rules file\n", filename);
1630 f = fopen(filename, "r");
1634 first_token = rules->token_cur;
1636 while (fgets(line, sizeof(line), f) != NULL) {
1640 /* skip whitespace */
1643 while (isspace(key[0]))
1654 /* continue reading if backslash+newline is found */
1655 while (line[len-2] == '\\') {
1656 if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1658 if (strlen(&line[len-2]) < 2)
1664 if (len+1 >= sizeof(line)) {
1665 err(rules->udev, "line too long '%s':%u, ignored\n", filename, line_nr);
1668 add_rule(rules, key, filename, filename_off, line_nr);
1672 /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1673 for (i = first_token+1; i < rules->token_cur; i++) {
1674 if (rules->tokens[i].type == TK_A_GOTO) {
1675 char *label = &rules->buf[rules->tokens[i].key.value_off];
1678 for (j = i+1; j < rules->token_cur; j++) {
1679 if (rules->tokens[j].type != TK_RULE)
1681 if (rules->tokens[j].rule.label_off == 0)
1683 if (strcmp(label, &rules->buf[rules->tokens[j].rule.label_off]) != 0)
1685 rules->tokens[i].key.rule_goto = j;
1688 if (rules->tokens[i].key.rule_goto == 0)
1689 err(rules->udev, "GOTO '%s' has no matching label in: '%s'\n", label, filename);
1695 static int add_matching_files(struct udev *udev, struct udev_list_node *file_list, const char *dirname, const char *suffix)
1698 char filename[UTIL_PATH_SIZE];
1700 dbg(udev, "open directory '%s'\n", dirname);
1701 dir = opendir(dirname);
1703 info(udev, "unable to open '%s': %m\n", dirname);
1708 struct dirent *dent;
1710 dent = readdir(dir);
1711 if (dent == NULL || dent->d_name[0] == '\0')
1714 if (dent->d_name[0] == '.')
1717 /* look for file matching with specified suffix */
1718 if (suffix != NULL) {
1721 ext = strrchr(dent->d_name, '.');
1724 if (strcmp(ext, suffix) != 0)
1727 util_strscpyl(filename, sizeof(filename), dirname, "/", dent->d_name, NULL);
1728 dbg(udev, "put file '%s' into list\n", filename);
1729 udev_list_entry_add(udev, file_list, filename, NULL, 1, 1);
1736 struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
1738 struct udev_rules *rules;
1739 struct stat statbuf;
1740 struct udev_list_node file_list;
1741 struct udev_list_entry *file_loop, *file_tmp;
1742 struct token end_token;
1744 rules = malloc(sizeof(struct udev_rules));
1747 memset(rules, 0x00, sizeof(struct udev_rules));
1749 rules->resolve_names = resolve_names;
1750 udev_list_init(&file_list);
1752 /* init token array and string buffer */
1753 rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
1754 if (rules->tokens == NULL)
1756 rules->token_max = PREALLOC_TOKEN;
1758 rules->buf = malloc(PREALLOC_STRBUF);
1759 if (rules->buf == NULL)
1761 rules->buf_max = PREALLOC_STRBUF;
1762 /* offset 0 is always '\0' */
1763 rules->buf[0] = '\0';
1765 dbg(udev, "prealloc %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1766 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1768 rules->trie_nodes = malloc(PREALLOC_TRIE * sizeof(struct trie_node));
1769 if (rules->trie_nodes == NULL)
1771 rules->trie_nodes_max = PREALLOC_TRIE;
1772 /* offset 0 is the trie root, with an empty string */
1773 memset(rules->trie_nodes, 0x00, sizeof(struct trie_node));
1774 rules->trie_nodes_cur = 1;
1776 if (udev_get_rules_path(udev) != NULL) {
1777 /* custom rules location for testing */
1778 add_matching_files(udev, &file_list, udev_get_rules_path(udev), ".rules");
1780 char filename[PATH_MAX];
1781 struct udev_list_node sort_list;
1782 struct udev_list_entry *sort_loop, *sort_tmp;
1784 /* read user/custom rules */
1785 add_matching_files(udev, &file_list, SYSCONFDIR "/udev/rules.d", ".rules");
1787 /* read dynamic/temporary rules */
1788 util_strscpyl(filename, sizeof(filename), udev_get_dev_path(udev), "/.udev/rules.d", NULL);
1789 udev_list_init(&sort_list);
1790 add_matching_files(udev, &sort_list, filename, ".rules");
1792 /* read default rules */
1793 add_matching_files(udev, &sort_list, LIBEXECDIR "/rules.d", ".rules");
1795 /* sort all rules files by basename into list of files */
1796 udev_list_entry_foreach_safe(sort_loop, sort_tmp, udev_list_get_entry(&sort_list)) {
1797 const char *sort_name = udev_list_entry_get_name(sort_loop);
1798 const char *sort_base = strrchr(sort_name, '/');
1800 if (sort_base == NULL)
1802 /* sort entry into existing list */
1803 udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1804 const char *file_name = udev_list_entry_get_name(file_loop);
1805 const char *file_base = strrchr(file_name, '/');
1807 if (file_base == NULL)
1809 if (strcmp(file_base, sort_base) == 0) {
1810 info(udev, "rule file basename '%s' already added, ignoring '%s'\n",
1811 file_name, sort_name);
1812 udev_list_entry_delete(sort_loop);
1816 if (strcmp(file_base, sort_base) > 0) {
1817 /* found later file, insert before */
1818 udev_list_entry_remove(sort_loop);
1819 udev_list_entry_insert_before(sort_loop, file_loop);
1824 /* current file already handled */
1825 if (sort_loop == NULL)
1827 /* no later file, append to end of list */
1828 udev_list_entry_remove(sort_loop);
1829 udev_list_entry_append(sort_loop, &file_list);
1833 /* add all filenames to the string buffer */
1834 udev_list_entry_foreach(file_loop, udev_list_get_entry(&file_list)) {
1835 const char *filename = udev_list_entry_get_name(file_loop);
1836 unsigned int filename_off;
1838 filename_off = add_string(rules, filename);
1839 /* the offset in the rule is limited to unsigned short */
1840 if (filename_off < USHRT_MAX)
1841 udev_list_entry_set_flags(file_loop, filename_off);
1844 /* parse list of files */
1845 udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1846 const char *filename = udev_list_entry_get_name(file_loop);
1847 unsigned int filename_off = udev_list_entry_get_flags(file_loop);
1849 if (stat(filename, &statbuf) == 0 && statbuf.st_size > 0)
1850 parse_file(rules, filename, filename_off);
1852 err(udev, "can not read '%s'\n", filename);
1853 udev_list_entry_delete(file_loop);
1856 memset(&end_token, 0x00, sizeof(struct token));
1857 end_token.type = TK_END;
1858 add_token(rules, &end_token);
1860 /* shrink allocated token and string buffer */
1861 if (rules->token_cur < rules->token_max) {
1862 struct token *tokens;
1864 tokens = realloc(rules->tokens, rules->token_cur * sizeof(struct token));
1865 if (tokens != NULL || rules->token_cur == 0) {
1866 rules->tokens = tokens;
1867 rules->token_max = rules->token_cur;
1870 if (rules->buf_cur < rules->buf_max) {
1873 buf = realloc(rules->buf, rules->buf_cur);
1874 if (buf != NULL || rules->buf_cur == 0) {
1876 rules->buf_max = rules->buf_cur;
1879 info(udev, "rules use %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1880 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1881 info(udev, "temporary index used %zu bytes (%u * %zu bytes)\n",
1882 rules->trie_nodes_cur * sizeof(struct trie_node),
1883 rules->trie_nodes_cur, sizeof(struct trie_node));
1886 free(rules->trie_nodes);
1887 rules->trie_nodes = NULL;
1888 rules->trie_nodes_cur = 0;
1889 rules->trie_nodes_max = 0;
1891 /* cleanup uid/gid cache */
1894 rules->uids_cur = 0;
1895 rules->uids_max = 0;
1898 rules->gids_cur = 0;
1899 rules->gids_max = 0;
1905 void udev_rules_unref(struct udev_rules *rules)
1909 free(rules->tokens);
1911 free(rules->trie_nodes);
1917 static int match_key(struct udev_rules *rules, struct token *token, const char *val)
1919 char *key_value = &rules->buf[token->key.value_off];
1926 switch (token->key.glob) {
1928 match = (strcmp(key_value, val) == 0);
1931 match = (fnmatch(key_value, val, 0) == 0);
1938 split = &rules->buf[token->key.value_off];
1943 next = strchr(split, '|');
1945 size_t matchlen = (size_t)(next - split);
1947 match = (matchlen == len && strncmp(split, val, matchlen) == 0);
1951 match = (strcmp(split, val) == 0);
1960 char value[UTIL_PATH_SIZE];
1962 util_strscpy(value, sizeof(value), &rules->buf[token->key.value_off]);
1964 while (key_value != NULL) {
1965 pos = strchr(key_value, '|');
1970 dbg(rules->udev, "match %s '%s' <-> '%s'\n", token_str(token->type), key_value, val);
1971 match = (fnmatch(key_value, val, 0) == 0);
1979 match = (val[0] != '\0');
1985 if (match && (token->key.op == OP_MATCH)) {
1986 dbg(rules->udev, "%s is true (matching value)\n", token_str(token->type));
1989 if (!match && (token->key.op == OP_NOMATCH)) {
1990 dbg(rules->udev, "%s is true (non-matching value)\n", token_str(token->type));
1993 dbg(rules->udev, "%s is not true\n", token_str(token->type));
1997 static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur)
2000 char nbuf[UTIL_NAME_SIZE];
2002 char vbuf[UTIL_NAME_SIZE];
2005 name = &rules->buf[cur->key.attr_off];
2006 switch (cur->key.attrsubst) {
2008 udev_event_apply_format(event, name, nbuf, sizeof(nbuf));
2012 value = udev_device_get_sysattr_value(dev, name);
2017 if (util_resolve_subsys_kernel(event->udev, name, vbuf, sizeof(vbuf), 1) != 0)
2025 /* remove trailing whitespace, if not asked to match for it */
2026 len = strlen(value);
2027 if (len > 0 && isspace(value[len-1])) {
2028 const char *key_value;
2031 key_value = &rules->buf[cur->key.value_off];
2032 klen = strlen(key_value);
2033 if (klen > 0 && !isspace(key_value[klen-1])) {
2034 if (value != vbuf) {
2035 util_strscpy(vbuf, sizeof(vbuf), value);
2038 while (len > 0 && isspace(vbuf[--len]))
2040 dbg(rules->udev, "removed trailing whitespace from '%s'\n", value);
2044 return match_key(rules, cur, value);
2053 int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event)
2057 enum escape_type esc = ESCAPE_UNSET;
2060 if (rules->tokens == NULL)
2063 can_set_name = ((strcmp(udev_device_get_action(event->dev), "remove") != 0) &&
2064 (major(udev_device_get_devnum(event->dev)) > 0 ||
2065 strcmp(udev_device_get_subsystem(event->dev), "net") == 0));
2067 /* loop through token list, match, run actions or forward to next rule */
2068 cur = &rules->tokens[0];
2071 dump_token(rules, cur);
2072 switch (cur->type) {
2076 /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
2077 if (!can_set_name && rule->rule.flags)
2082 if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
2086 if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
2090 if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
2095 size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
2096 struct udev_list_entry *list_entry;
2099 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
2100 const char *devlink;
2102 devlink = &udev_list_entry_get_name(list_entry)[devlen];
2103 if (match_key(rules, cur, devlink) == 0) {
2113 if (match_key(rules, cur, event->name) != 0)
2118 const char *key_name = &rules->buf[cur->key.attr_off];
2121 value = udev_device_get_property_value(event->dev, key_name);
2122 if (value == NULL) {
2123 dbg(event->udev, "ENV{%s} is not set, treat as empty\n", key_name);
2126 if (match_key(rules, cur, value))
2130 case TK_M_SUBSYSTEM:
2131 if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
2135 if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
2140 char filename[UTIL_PATH_SIZE];
2143 udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename));
2144 found = (wait_for_file(event->dev, filename, 10) == 0);
2145 if (!found && (cur->key.op != OP_NOMATCH))
2150 if (match_attr(rules, event->dev, event, cur) != 0)
2154 case TK_M_SUBSYSTEMS:
2160 /* get whole sequence of parent matches */
2162 while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX)
2165 /* loop over parents */
2166 event->dev_parent = event->dev;
2170 dbg(event->udev, "parent: '%s'\n", udev_device_get_syspath(event->dev_parent));
2171 /* loop over sequence of parent match keys */
2172 for (key = cur; key < next; key++ ) {
2173 dump_token(rules, key);
2176 if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
2179 case TK_M_SUBSYSTEMS:
2180 if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
2184 if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
2188 if (match_attr(rules, event->dev_parent, event, key) != 0)
2194 dbg(event->udev, "parent key matched\n");
2196 dbg(event->udev, "all parent keys matched\n");
2197 /* all keys matched */
2201 event->dev_parent = udev_device_get_parent(event->dev_parent);
2202 if (event->dev_parent == NULL)
2205 /* move behind our sequence of parent match keys */
2211 char filename[UTIL_PATH_SIZE];
2212 struct stat statbuf;
2215 udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename));
2216 if (util_resolve_subsys_kernel(event->udev, filename, filename, sizeof(filename), 0) != 0) {
2217 if (filename[0] != '/') {
2218 char tmp[UTIL_PATH_SIZE];
2220 util_strscpy(tmp, sizeof(tmp), filename);
2221 util_strscpyl(filename, sizeof(filename),
2222 udev_device_get_syspath(event->dev), "/", tmp, NULL);
2225 attr_subst_subdir(filename, sizeof(filename));
2227 match = (stat(filename, &statbuf) == 0);
2228 dbg(event->udev, "'%s' %s", filename, match ? "exists\n" : "does not exist\n");
2229 if (match && cur->key.mode > 0) {
2230 match = ((statbuf.st_mode & cur->key.mode) > 0);
2231 dbg(event->udev, "'%s' has mode=%#o and %s %#o\n", filename, statbuf.st_mode,
2232 match ? "matches" : "does not match", cur->key.mode);
2234 if (match && cur->key.op == OP_NOMATCH)
2236 if (!match && cur->key.op == OP_MATCH)
2242 char program[UTIL_PATH_SIZE];
2244 char result[UTIL_PATH_SIZE];
2246 free(event->program_result);
2247 event->program_result = NULL;
2248 udev_event_apply_format(event, &rules->buf[cur->key.value_off], program, sizeof(program));
2249 envp = udev_device_get_properties_envp(event->dev);
2250 info(event->udev, "PROGRAM '%s' %s:%u\n",
2252 &rules->buf[rule->rule.filename_off],
2253 rule->rule.filename_line);
2254 if (util_run_program(event->udev, program, envp, result, sizeof(result), NULL, NULL) != 0) {
2255 if (cur->key.op != OP_NOMATCH)
2260 util_remove_trailing_chars(result, '\n');
2261 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2262 count = udev_util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
2264 info(event->udev, "%i character(s) replaced\n" , count);
2266 event->program_result = strdup(result);
2267 dbg(event->udev, "storing result '%s'\n", event->program_result);
2268 if (cur->key.op == OP_NOMATCH)
2273 case TK_M_IMPORT_FILE:
2275 char import[UTIL_PATH_SIZE];
2277 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2278 if (import_file_into_properties(event->dev, import) != 0)
2279 if (cur->key.op != OP_NOMATCH)
2283 case TK_M_IMPORT_PROG:
2285 char import[UTIL_PATH_SIZE];
2287 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2288 info(event->udev, "IMPORT '%s' %s:%u\n",
2290 &rules->buf[rule->rule.filename_off],
2291 rule->rule.filename_line);
2292 if (import_program_into_properties(event->dev, import) != 0)
2293 if (cur->key.op != OP_NOMATCH)
2297 case TK_M_IMPORT_DB:
2299 const char *key = &rules->buf[cur->key.value_off];
2302 value = udev_device_get_property_value(event->dev_db, key);
2303 if (value != NULL) {
2304 struct udev_list_entry *entry;
2306 entry = udev_device_add_property(event->dev, key, value);
2307 udev_list_entry_set_flags(entry, 1);
2309 if (cur->key.op != OP_NOMATCH)
2314 case TK_M_IMPORT_PARENT:
2316 char import[UTIL_PATH_SIZE];
2318 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2319 if (import_parent_into_properties(event->dev, import) != 0)
2320 if (cur->key.op != OP_NOMATCH)
2325 if (match_key(rules, cur, event->program_result) != 0)
2328 case TK_A_STRING_ESCAPE_NONE:
2331 case TK_A_STRING_ESCAPE_REPLACE:
2332 esc = ESCAPE_REPLACE;
2334 case TK_A_NUM_FAKE_PART:
2335 if (strcmp(udev_device_get_subsystem(event->dev), "block") != 0)
2337 if (udev_device_get_sysnum(event->dev) != NULL)
2339 udev_device_set_num_fake_partitions(event->dev, cur->key.num_fake_part);
2341 case TK_A_INOTIFY_WATCH:
2342 event->inotify_watch = cur->key.watch;
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 udev_event_apply_format(event, &rules->buf[cur->key.value_off], owner, sizeof(owner));
2356 event->uid = util_lookup_user(event->udev, owner);
2357 info(event->udev, "OWNER %u %s:%u\n",
2359 &rules->buf[rule->rule.filename_off],
2360 rule->rule.filename_line);
2365 char group[UTIL_NAME_SIZE];
2367 if (event->group_final)
2369 if (cur->key.op == OP_ASSIGN_FINAL)
2370 event->group_final = 1;
2371 udev_event_apply_format(event, &rules->buf[cur->key.value_off], group, sizeof(group));
2372 event->gid = util_lookup_group(event->udev, group);
2373 info(event->udev, "GROUP %u %s:%u\n",
2375 &rules->buf[rule->rule.filename_off],
2376 rule->rule.filename_line);
2381 char mode[UTIL_NAME_SIZE];
2384 if (event->mode_final)
2386 if (cur->key.op == OP_ASSIGN_FINAL)
2387 event->mode_final = 1;
2388 udev_event_apply_format(event, &rules->buf[cur->key.value_off], mode, sizeof(mode));
2389 event->mode = strtol(mode, &endptr, 8);
2390 if (endptr[0] != '\0') {
2391 err(event->udev, "invalide mode '%s' set default mode 0660\n", mode);
2394 info(event->udev, "MODE %#o %s:%u\n",
2396 &rules->buf[rule->rule.filename_off],
2397 rule->rule.filename_line);
2401 if (event->owner_final)
2403 if (cur->key.op == OP_ASSIGN_FINAL)
2404 event->owner_final = 1;
2405 event->uid = cur->key.uid;
2406 info(event->udev, "OWNER %u %s:%u\n",
2408 &rules->buf[rule->rule.filename_off],
2409 rule->rule.filename_line);
2412 if (event->group_final)
2414 if (cur->key.op == OP_ASSIGN_FINAL)
2415 event->group_final = 1;
2416 event->gid = cur->key.gid;
2417 info(event->udev, "GROUP %u %s:%u\n",
2419 &rules->buf[rule->rule.filename_off],
2420 rule->rule.filename_line);
2423 if (event->mode_final)
2425 if (cur->key.op == OP_ASSIGN_FINAL)
2426 event->mode_final = 1;
2427 event->mode = cur->key.mode;
2428 info(event->udev, "MODE %#o %s:%u\n",
2430 &rules->buf[rule->rule.filename_off],
2431 rule->rule.filename_line);
2435 const char *name = &rules->buf[cur->key.attr_off];
2436 char *value = &rules->buf[cur->key.value_off];
2438 if (value[0] != '\0') {
2439 char temp_value[UTIL_NAME_SIZE];
2440 struct udev_list_entry *entry;
2442 udev_event_apply_format(event, value, temp_value, sizeof(temp_value));
2443 entry = udev_device_add_property(event->dev, name, temp_value);
2444 /* store in db, skip private keys */
2446 udev_list_entry_set_flags(entry, 1);
2448 udev_device_add_property(event->dev, name, NULL);
2454 const char *name = &rules->buf[cur->key.value_off];
2455 char name_str[UTIL_PATH_SIZE];
2458 if (event->name_final)
2460 if (cur->key.op == OP_ASSIGN_FINAL)
2461 event->name_final = 1;
2462 udev_event_apply_format(event, name, name_str, sizeof(name_str));
2463 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2464 count = udev_util_replace_chars(name_str, "/");
2466 info(event->udev, "%i character(s) replaced\n", count);
2469 event->name = strdup(name_str);
2470 info(event->udev, "NAME '%s' %s:%u\n",
2472 &rules->buf[rule->rule.filename_off],
2473 rule->rule.filename_line);
2478 char temp[UTIL_PATH_SIZE];
2479 char filename[UTIL_PATH_SIZE];
2483 if (event->devlink_final)
2485 if (major(udev_device_get_devnum(event->dev)) == 0)
2487 if (cur->key.op == OP_ASSIGN_FINAL)
2488 event->devlink_final = 1;
2489 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2490 udev_device_cleanup_devlinks_list(event->dev);
2492 /* allow multiple symlinks separated by spaces */
2493 udev_event_apply_format(event, &rules->buf[cur->key.value_off], temp, sizeof(temp));
2494 if (esc == ESCAPE_UNSET)
2495 count = udev_util_replace_chars(temp, "/ ");
2496 else if (esc == ESCAPE_REPLACE)
2497 count = udev_util_replace_chars(temp, "/");
2499 info(event->udev, "%i character(s) replaced\n" , count);
2500 dbg(event->udev, "rule applied, added symlink(s) '%s'\n", temp);
2502 while (isspace(pos[0]))
2504 next = strchr(pos, ' ');
2505 while (next != NULL) {
2507 info(event->udev, "LINK '%s' %s:%u\n", pos,
2508 &rules->buf[rule->rule.filename_off], rule->rule.filename_line);
2509 util_strscpyl(filename, sizeof(filename), udev_get_dev_path(event->udev), "/", pos, NULL);
2510 udev_device_add_devlink(event->dev, filename, cur->key.devlink_unique);
2511 while (isspace(next[1]))
2514 next = strchr(pos, ' ');
2516 if (pos[0] != '\0') {
2517 info(event->udev, "LINK '%s' %s:%u\n", pos,
2518 &rules->buf[rule->rule.filename_off], rule->rule.filename_line);
2519 util_strscpyl(filename, sizeof(filename), udev_get_dev_path(event->udev), "/", pos, NULL);
2520 udev_device_add_devlink(event->dev, filename, cur->key.devlink_unique);
2524 case TK_A_EVENT_TIMEOUT:
2525 udev_device_set_event_timeout(event->dev, cur->key.event_timeout);
2527 case TK_A_IGNORE_REMOVE:
2528 udev_device_set_ignore_remove(event->dev, 1);
2532 const char *key_name = &rules->buf[cur->key.attr_off];
2533 char attr[UTIL_PATH_SIZE];
2534 char value[UTIL_NAME_SIZE];
2537 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0)
2538 util_strscpyl(attr, sizeof(attr), udev_device_get_syspath(event->dev), "/", key_name, NULL);
2539 attr_subst_subdir(attr, sizeof(attr));
2541 udev_event_apply_format(event, &rules->buf[cur->key.value_off], value, sizeof(value));
2542 info(event->udev, "ATTR '%s' writing '%s' %s:%u\n", attr, value,
2543 &rules->buf[rule->rule.filename_off],
2544 rule->rule.filename_line);
2545 f = fopen(attr, "w");
2547 if (fprintf(f, "%s", value) <= 0)
2548 err(event->udev, "error writing ATTR{%s}: %m\n", attr);
2551 err(event->udev, "error opening ATTR{%s} for writing: %m\n", attr);
2557 struct udev_list_entry *list_entry;
2559 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2560 udev_list_cleanup_entries(event->udev, &event->run_list);
2561 info(event->udev, "RUN '%s' %s:%u\n",
2562 &rules->buf[cur->key.value_off],
2563 &rules->buf[rule->rule.filename_off],
2564 rule->rule.filename_line);
2565 list_entry = udev_list_entry_add(event->udev, &event->run_list,
2566 &rules->buf[cur->key.value_off], NULL, 1, 0);
2567 if (cur->key.fail_on_error)
2568 udev_list_entry_set_flags(list_entry, 1);
2572 if (cur->key.rule_goto == 0)
2574 cur = &rules->tokens[cur->key.rule_goto];
2579 case TK_M_PARENTS_MIN:
2580 case TK_M_PARENTS_MAX:
2583 err(rules->udev, "wrong type %u\n", cur->type);
2590 /* fast-forward to next rule */
2591 cur = rule + rule->rule.token_count;
2592 dbg(rules->udev, "forward to rule: %u\n",
2593 (unsigned int) (cur - rules->tokens));