2 * Copyright (C) 2008-2009 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/>.
33 #define PREALLOC_TOKEN 2048
34 #define PREALLOC_STRBUF 32 * 1024
35 #define PREALLOC_TRIE 256
38 unsigned int name_off;
46 /* this node's first child */
47 unsigned int child_idx;
48 /* the next child of our parent node's child list */
49 unsigned int next_child_idx;
50 /* this node's last child (shortcut for append) */
51 unsigned int last_child_idx;
52 unsigned int value_off;
53 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 struct trie_node *trie_nodes;
74 unsigned int trie_nodes_cur;
75 unsigned int trie_nodes_max;
77 /* during rule parsing, uid/gid lookup results are cached */
79 unsigned int uids_cur;
80 unsigned int uids_max;
82 unsigned int gids_cur;
83 unsigned int gids_max;
86 /* KEY=="", KEY!="", KEY+="", KEY="", KEY:="" */
99 enum string_glob_type {
101 GL_PLAIN, /* no special chars */
102 GL_GLOB, /* shell globs ?,*,[] */
103 GL_SPLIT, /* multi-value A|B */
104 GL_SPLIT_GLOB, /* multi-value with glob A*|B* */
105 GL_SOMETHING, /* commonly used "?*" */
108 enum string_subst_type {
115 /* tokens of a rule are sorted/handled in this order */
120 TK_M_ACTION, /* val */
121 TK_M_DEVPATH, /* val */
122 TK_M_KERNEL, /* val */
123 TK_M_DEVLINK, /* val */
125 TK_M_ENV, /* val, attr */
126 TK_M_SUBSYSTEM, /* val */
127 TK_M_DRIVER, /* val */
128 TK_M_WAITFOR, /* val */
129 TK_M_ATTR, /* val, attr */
132 TK_M_KERNELS, /* val */
133 TK_M_SUBSYSTEMS, /* val */
134 TK_M_DRIVERS, /* val */
135 TK_M_ATTRS, /* val, attr */
138 TK_M_TEST, /* val, mode_t */
139 TK_M_PROGRAM, /* val */
140 TK_M_IMPORT_FILE, /* val */
141 TK_M_IMPORT_PROG, /* val */
142 TK_M_IMPORT_PARENT, /* val */
143 TK_M_RESULT, /* val */
147 TK_A_STRING_ESCAPE_NONE,
148 TK_A_STRING_ESCAPE_REPLACE,
149 TK_A_INOTIFY_WATCH, /* int */
150 TK_A_NUM_FAKE_PART, /* int */
151 TK_A_DEVLINK_PRIO, /* int */
152 TK_A_OWNER, /* val */
153 TK_A_GROUP, /* val */
155 TK_A_OWNER_ID, /* uid_t */
156 TK_A_GROUP_ID, /* gid_t */
157 TK_A_MODE_ID, /* mode_t */
158 TK_A_ENV, /* val, attr */
160 TK_A_DEVLINK, /* val */
161 TK_A_EVENT_TIMEOUT, /* int */
163 TK_A_ATTR, /* val, attr */
164 TK_A_RUN, /* val, bool */
165 TK_A_GOTO, /* size_t */
171 /* we try to pack stuff in a way that we take only 12 bytes per token */
174 unsigned char type; /* same as in rule and key */
176 enum token_type type:8;
177 unsigned int flags:8;
178 unsigned short token_count;
179 unsigned int label_off;
180 unsigned short filename_off;
181 unsigned short filename_line;
184 enum token_type type:8;
185 enum operation_type op:8;
186 enum string_glob_type glob:8;
187 enum string_subst_type subst:4;
188 enum string_subst_type attrsubst:4;
189 unsigned int value_off;
191 unsigned int attr_off;
193 unsigned int rule_goto;
208 struct udev_rules *rules;
210 struct token token[MAX_TK];
211 unsigned int token_cur;
215 static const char *operation_str(enum operation_type type)
217 static const char *operation_strs[] = {
218 [OP_UNSET] = "UNSET",
219 [OP_MATCH] = "match",
220 [OP_NOMATCH] = "nomatch",
221 [OP_MATCH_MAX] = "MATCH_MAX",
224 [OP_ASSIGN] = "assign",
225 [OP_ASSIGN_FINAL] = "assign-final",
228 return operation_strs[type];
231 static const char *string_glob_str(enum string_glob_type type)
233 static const char *string_glob_strs[] = {
234 [GL_UNSET] = "UNSET",
235 [GL_PLAIN] = "plain",
237 [GL_SPLIT] = "split",
238 [GL_SPLIT_GLOB] = "split-glob",
239 [GL_SOMETHING] = "split-glob",
242 return string_glob_strs[type];
245 static const char *token_str(enum token_type type)
247 static const char *token_strs[] = {
248 [TK_UNSET] = "UNSET",
251 [TK_M_ACTION] = "M ACTION",
252 [TK_M_DEVPATH] = "M DEVPATH",
253 [TK_M_KERNEL] = "M KERNEL",
254 [TK_M_DEVLINK] = "M DEVLINK",
255 [TK_M_NAME] = "M NAME",
256 [TK_M_ENV] = "M ENV",
257 [TK_M_SUBSYSTEM] = "M SUBSYSTEM",
258 [TK_M_DRIVER] = "M DRIVER",
259 [TK_M_WAITFOR] = "M WAITFOR",
260 [TK_M_ATTR] = "M ATTR",
262 [TK_M_PARENTS_MIN] = "M PARENTS_MIN",
263 [TK_M_KERNELS] = "M KERNELS",
264 [TK_M_SUBSYSTEMS] = "M SUBSYSTEMS",
265 [TK_M_DRIVERS] = "M DRIVERS",
266 [TK_M_ATTRS] = "M ATTRS",
267 [TK_M_PARENTS_MAX] = "M PARENTS_MAX",
269 [TK_M_TEST] = "M TEST",
270 [TK_M_PROGRAM] = "M PROGRAM",
271 [TK_M_IMPORT_FILE] = "M IMPORT_FILE",
272 [TK_M_IMPORT_PROG] = "M IMPORT_PROG",
273 [TK_M_IMPORT_PARENT] = "M MPORT_PARENT",
274 [TK_M_RESULT] = "M RESULT",
275 [TK_M_MAX] = "M MAX",
277 [TK_A_IGNORE_DEVICE] = "A IGNORE_DEVICE",
278 [TK_A_STRING_ESCAPE_NONE] = "A STRING_ESCAPE_NONE",
279 [TK_A_STRING_ESCAPE_REPLACE] = "A STRING_ESCAPE_REPLACE",
280 [TK_A_INOTIFY_WATCH] = "A INOTIFY_WATCH",
281 [TK_A_NUM_FAKE_PART] = "A NUM_FAKE_PART",
282 [TK_A_DEVLINK_PRIO] = "A DEVLINK_PRIO",
283 [TK_A_OWNER] = "A OWNER",
284 [TK_A_GROUP] = "A GROUP",
285 [TK_A_MODE] = "A MODE",
286 [TK_A_OWNER_ID] = "A OWNER_ID",
287 [TK_A_GROUP_ID] = "A GROUP_ID",
288 [TK_A_MODE_ID] = "A MODE_ID",
289 [TK_A_ENV] = "A ENV",
290 [TK_A_NAME] = "A NAME",
291 [TK_A_DEVLINK] = "A DEVLINK",
292 [TK_A_EVENT_TIMEOUT] = "A EVENT_TIMEOUT",
293 [TK_A_IGNORE_REMOVE] = "A IGNORE_REMOVE",
294 [TK_A_ATTR] = "A ATTR",
295 [TK_A_RUN] = "A RUN",
296 [TK_A_GOTO] = "A GOTO",
297 [TK_A_LAST_RULE] = "A LAST_RULE",
302 return token_strs[type];
305 static void dump_token(struct udev_rules *rules, struct token *token)
307 enum token_type type = token->type;
308 enum operation_type op = token->key.op;
309 enum string_glob_type glob = token->key.glob;
310 const char *value = &rules->buf[token->key.value_off];
311 const char *attr = &rules->buf[token->key.attr_off];
316 const char *tks_ptr = (char *)rules->tokens;
317 const char *tk_ptr = (char *)token;
318 unsigned int idx = (tk_ptr - tks_ptr) / sizeof(struct token);
320 dbg(rules->udev, "* RULE %s:%u, token: %u, count: %u, label: '%s', flags: 0x%02x\n",
321 &rules->buf[token->rule.filename_off], token->rule.filename_line,
322 idx, token->rule.token_count,
323 &rules->buf[token->rule.label_off],
336 case TK_M_SUBSYSTEMS:
339 case TK_M_IMPORT_FILE:
340 case TK_M_IMPORT_PROG:
341 case TK_M_IMPORT_PARENT:
349 dbg(rules->udev, "%s %s '%s'(%s)\n",
350 token_str(type), operation_str(op), value, string_glob_str(glob));
357 dbg(rules->udev, "%s %s '%s' '%s'(%s)\n",
358 token_str(type), operation_str(op), attr, value, string_glob_str(glob));
360 case TK_A_IGNORE_DEVICE:
361 case TK_A_STRING_ESCAPE_NONE:
362 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);
722 udev_list_entry_set_flag(entry, 1);
727 static int import_file_into_properties(struct udev_device *dev, const char *filename)
730 char line[UTIL_LINE_SIZE];
732 f = fopen(filename, "r");
735 while (fgets(line, sizeof(line), f) != NULL)
736 import_property_from_string(dev, line);
741 static int import_program_into_properties(struct udev_device *dev, const char *program)
743 struct udev *udev = udev_device_get_udev(dev);
749 envp = udev_device_get_properties_envp(dev);
750 if (util_run_program(udev, program, envp, result, sizeof(result), &reslen) != 0)
754 while (line != NULL) {
757 pos = strchr(line, '\n');
762 import_property_from_string(dev, line);
768 static int import_parent_into_properties(struct udev_device *dev, const char *filter)
770 struct udev *udev = udev_device_get_udev(dev);
771 struct udev_device *dev_parent;
772 struct udev_list_entry *list_entry;
774 dev_parent = udev_device_get_parent(dev);
775 if (dev_parent == NULL)
778 dbg(udev, "found parent '%s', get the node name\n", udev_device_get_syspath(dev_parent));
779 udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
780 const char *key = udev_list_entry_get_name(list_entry);
781 const char *val = udev_list_entry_get_value(list_entry);
783 if (fnmatch(filter, key, 0) == 0) {
784 struct udev_list_entry *entry;
786 dbg(udev, "import key '%s=%s'\n", key, val);
787 entry = udev_device_add_property(dev, key, val);
789 udev_list_entry_set_flag(entry, 1);
795 #define WAIT_LOOP_PER_SECOND 50
796 static int wait_for_file(struct udev_device *dev, const char *file, int timeout)
798 struct udev *udev = udev_device_get_udev(dev);
799 char filepath[UTIL_PATH_SIZE];
800 char devicepath[UTIL_PATH_SIZE];
802 int loop = timeout * WAIT_LOOP_PER_SECOND;
804 /* a relative path is a device attribute */
805 devicepath[0] = '\0';
806 if (file[0] != '/') {
807 util_strscpyl(devicepath, sizeof(devicepath),
808 udev_get_sys_path(udev), udev_device_get_devpath(dev), NULL);
809 util_strscpyl(filepath, sizeof(filepath), devicepath, "/", file, NULL);
813 dbg(udev, "will wait %i sec for '%s'\n", timeout, file);
816 if (stat(file, &stats) == 0) {
817 info(udev, "file '%s' appeared after %i loops\n", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
820 /* make sure, the device did not disappear in the meantime */
821 if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
822 info(udev, "device disappeared while waiting for '%s'\n", file);
825 info(udev, "wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND);
826 usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND);
828 info(udev, "waiting for '%s' failed\n", file);
832 static int attr_subst_subdir(char *attr, size_t len)
836 if (strstr(attr, "/*/")) {
838 char dirname[UTIL_PATH_SIZE];
842 util_strscpy(dirname, sizeof(dirname), attr);
843 pos = strstr(dirname, "/*/");
848 dir = opendir(dirname);
852 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
855 if (dent->d_name[0] == '.')
857 util_strscpyl(attr, len, dirname, "/", dent->d_name, tail, NULL);
858 if (stat(attr, &stats) == 0) {
870 static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value)
876 if (linepos == NULL && linepos[0] == '\0')
879 /* skip whitespace */
880 while (isspace(linepos[0]) || linepos[0] == ',')
884 if (linepos[0] == '\0')
890 if (linepos[0] == '\0')
892 if (isspace(linepos[0]))
894 if (linepos[0] == '=')
896 if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
897 if (linepos[1] == '=')
901 /* remember end of key */
904 /* skip whitespace after key */
905 while (isspace(linepos[0]))
907 if (linepos[0] == '\0')
910 /* get operation type */
911 if (linepos[0] == '=' && linepos[1] == '=') {
914 } else if (linepos[0] == '!' && linepos[1] == '=') {
917 } else if (linepos[0] == '+' && linepos[1] == '=') {
920 } else if (linepos[0] == '=') {
923 } else if (linepos[0] == ':' && linepos[1] == '=') {
924 *op = OP_ASSIGN_FINAL;
932 /* skip whitespace after operator */
933 while (isspace(linepos[0]))
935 if (linepos[0] == '\0')
939 if (linepos[0] == '"')
946 temp = strchr(linepos, '"');
951 dbg(udev, "%s '%s'-'%s'\n", operation_str(*op), *key, *value);
953 /* move line to next key */
958 /* extract possible KEY{attr} */
959 static char *get_key_attribute(struct udev *udev, char *str)
964 attr = strchr(str, '{');
967 pos = strchr(attr, '}');
969 err(udev, "missing closing brace for format\n");
973 dbg(udev, "attribute='%s'\n", attr);
979 static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
980 enum operation_type op,
981 const char *value, const void *data)
983 struct token *token = &rule_tmp->token[rule_tmp->token_cur];
984 const char *attr = NULL;
986 memset(token, 0x00, sizeof(struct token));
998 case TK_M_SUBSYSTEMS:
1001 case TK_M_IMPORT_FILE:
1002 case TK_M_IMPORT_PROG:
1003 case TK_M_IMPORT_PARENT:
1011 token->key.value_off = add_string(rule_tmp->rules, value);
1019 token->key.value_off = add_string(rule_tmp->rules, value);
1020 token->key.attr_off = add_string(rule_tmp->rules, attr);
1023 token->key.value_off = add_string(rule_tmp->rules, value);
1025 token->key.mode = *(mode_t *)data;
1027 case TK_A_IGNORE_DEVICE:
1028 case TK_A_STRING_ESCAPE_NONE:
1029 case TK_A_STRING_ESCAPE_REPLACE:
1030 case TK_A_IGNORE_REMOVE:
1031 case TK_A_LAST_RULE:
1034 token->key.value_off = add_string(rule_tmp->rules, value);
1035 token->key.ignore_error = *(int *)data;
1037 case TK_A_INOTIFY_WATCH:
1038 case TK_A_NUM_FAKE_PART:
1039 case TK_A_DEVLINK_PRIO:
1040 token->key.devlink_prio = *(int *)data;
1043 token->key.uid = *(uid_t *)data;
1046 token->key.gid = *(gid_t *)data;
1049 token->key.mode = *(mode_t *)data;
1051 case TK_A_EVENT_TIMEOUT:
1052 token->key.event_timeout = *(int *)data;
1055 case TK_M_PARENTS_MIN:
1056 case TK_M_PARENTS_MAX:
1060 err(rule_tmp->rules->udev, "wrong type %u\n", type);
1064 if (value != NULL && type < TK_M_MAX) {
1065 /* check if we need to split or call fnmatch() while matching rules */
1066 enum string_glob_type glob;
1070 has_split = (strchr(value, '|') != NULL);
1071 has_glob = (strchr(value, '*') != NULL || strchr(value, '?') != NULL || strchr(value, '[') != NULL);
1072 if (has_split && has_glob) {
1073 glob = GL_SPLIT_GLOB;
1074 } else if (has_split) {
1076 } else if (has_glob) {
1077 if (strcmp(value, "?*") == 0)
1078 glob = GL_SOMETHING;
1084 token->key.glob = glob;
1087 if (value != NULL && type > TK_M_MAX) {
1088 /* check if assigned value has substitution chars */
1089 if (value[0] == '[')
1090 token->key.subst = SB_SUBSYS;
1091 else if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
1092 token->key.subst = SB_FORMAT;
1094 token->key.subst = SB_NONE;
1098 /* check if property/attribut name has substitution chars */
1100 token->key.attrsubst = SB_SUBSYS;
1101 else if (strchr(attr, '%') != NULL || strchr(attr, '$') != NULL)
1102 token->key.attrsubst = SB_FORMAT;
1104 token->key.attrsubst = SB_NONE;
1107 token->key.type = type;
1109 rule_tmp->token_cur++;
1110 if (rule_tmp->token_cur >= ARRAY_SIZE(rule_tmp->token)) {
1111 err(rule_tmp->rules->udev, "temporary rule array too small\n");
1117 static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp)
1120 unsigned int start = 0;
1121 unsigned int end = rule_tmp->token_cur;
1123 for (i = 0; i < rule_tmp->token_cur; i++) {
1124 enum token_type next_val = TK_UNSET;
1125 unsigned int next_idx;
1128 /* find smallest value */
1129 for (j = start; j < end; j++) {
1130 if (rule_tmp->token[j].type == TK_UNSET)
1132 if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
1133 next_val = rule_tmp->token[j].type;
1138 /* add token and mark done */
1139 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
1141 rule_tmp->token[next_idx].type = TK_UNSET;
1144 if (next_idx == start)
1146 if (next_idx+1 == end)
1152 static int add_rule(struct udev_rules *rules, char *line,
1153 const char *filename, unsigned int filename_off, unsigned int lineno)
1157 struct rule_tmp rule_tmp;
1159 memset(&rule_tmp, 0x00, sizeof(struct rule_tmp));
1160 rule_tmp.rules = rules;
1161 rule_tmp.rule.type = TK_RULE;
1162 rule_tmp.rule.rule.filename_off = filename_off;
1163 rule_tmp.rule.rule.filename_line = lineno;
1169 enum operation_type op;
1171 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0)
1174 if (strcmp(key, "ACTION") == 0) {
1175 if (op > OP_MATCH_MAX) {
1176 err(rules->udev, "invalid ACTION operation\n");
1179 rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL);
1183 if (strcmp(key, "DEVPATH") == 0) {
1184 if (op > OP_MATCH_MAX) {
1185 err(rules->udev, "invalid DEVPATH operation\n");
1188 rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
1192 if (strcmp(key, "KERNEL") == 0) {
1193 if (op > OP_MATCH_MAX) {
1194 err(rules->udev, "invalid KERNEL operation\n");
1197 rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL);
1201 if (strcmp(key, "SUBSYSTEM") == 0) {
1202 if (op > OP_MATCH_MAX) {
1203 err(rules->udev, "invalid SUBSYSTEM operation\n");
1206 /* bus, class, subsystem events should all be the same */
1207 if (strcmp(value, "subsystem") == 0 ||
1208 strcmp(value, "bus") == 0 ||
1209 strcmp(value, "class") == 0) {
1210 if (strcmp(value, "bus") == 0 || strcmp(value, "class") == 0)
1211 err(rules->udev, "'%s' must be specified as 'subsystem' \n"
1212 "please fix it in %s:%u", value, filename, lineno);
1213 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
1215 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
1219 if (strcmp(key, "DRIVER") == 0) {
1220 if (op > OP_MATCH_MAX) {
1221 err(rules->udev, "invalid DRIVER operation\n");
1224 rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL);
1228 if (strncmp(key, "ATTR{", sizeof("ATTR{")-1) == 0) {
1229 attr = get_key_attribute(rules->udev, key + sizeof("ATTR")-1);
1231 err(rules->udev, "error parsing ATTR attribute\n");
1234 if (op < OP_MATCH_MAX) {
1235 rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
1237 rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr);
1242 if (strcmp(key, "KERNELS") == 0 ||
1243 strcmp(key, "ID") == 0) {
1244 if (op > OP_MATCH_MAX) {
1245 err(rules->udev, "invalid KERNELS operation\n");
1248 rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1252 if (strcmp(key, "SUBSYSTEMS") == 0 ||
1253 strcmp(key, "BUS") == 0) {
1254 if (op > OP_MATCH_MAX) {
1255 err(rules->udev, "invalid SUBSYSTEMS operation\n");
1258 rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1262 if (strcmp(key, "DRIVERS") == 0) {
1263 if (op > OP_MATCH_MAX) {
1264 err(rules->udev, "invalid DRIVERS operation\n");
1267 rule_add_key(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
1271 if (strncmp(key, "ATTRS{", sizeof("ATTRS{")-1) == 0 ||
1272 strncmp(key, "SYSFS{", sizeof("SYSFS{")-1) == 0) {
1273 if (op > OP_MATCH_MAX) {
1274 err(rules->udev, "invalid ATTRS operation\n");
1277 attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
1279 err(rules->udev, "error parsing ATTRS attribute\n");
1282 if (strncmp(attr, "device/", 7) == 0)
1283 err(rules->udev, "the 'device' link may not be available in a future kernel, "
1284 "please fix it in %s:%u", filename, lineno);
1285 else if (strstr(attr, "../") != NULL)
1286 err(rules->udev, "do not reference parent sysfs directories directly, "
1287 "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
1288 rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1292 if (strncmp(key, "ENV{", sizeof("ENV{")-1) == 0) {
1293 attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1);
1295 err(rules->udev, "error parsing ENV attribute\n");
1298 if (op < OP_MATCH_MAX) {
1299 if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
1302 if (rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
1308 if (strcmp(key, "PROGRAM") == 0) {
1309 rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
1313 if (strcmp(key, "RESULT") == 0) {
1314 if (op > OP_MATCH_MAX) {
1315 err(rules->udev, "invalid RESULT operation\n");
1318 rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL);
1322 if (strncmp(key, "IMPORT", sizeof("IMPORT")-1) == 0) {
1323 attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1);
1324 if (attr != NULL && strstr(attr, "program")) {
1325 dbg(rules->udev, "IMPORT will be executed\n");
1326 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1327 } else if (attr != NULL && strstr(attr, "file")) {
1328 dbg(rules->udev, "IMPORT will be included as file\n");
1329 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1330 } else if (attr != NULL && strstr(attr, "parent")) {
1331 dbg(rules->udev, "IMPORT will include the parent values\n");
1332 rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
1334 /* figure it out if it is executable */
1335 char file[UTIL_PATH_SIZE];
1337 struct stat statbuf;
1339 /* allow programs in /lib/udev called without the path */
1340 if (value[0] != '/')
1341 util_strscpyl(file, sizeof(file), LIBEXECDIR "/", value, NULL);
1343 util_strscpy(file, sizeof(file), value);
1344 pos = strchr(file, ' ');
1347 dbg(rules->udev, "IMPORT auto mode for '%s'\n", file);
1348 if (stat(file, &statbuf) == 0 && (statbuf.st_mode & S_IXUSR)) {
1349 dbg(rules->udev, "IMPORT will be executed (autotype)\n");
1350 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1352 dbg(rules->udev, "IMPORT will be included as file (autotype)\n");
1353 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1359 if (strncmp(key, "TEST", sizeof("TEST")-1) == 0) {
1362 if (op > OP_MATCH_MAX) {
1363 err(rules->udev, "invalid TEST operation\n");
1366 attr = get_key_attribute(rules->udev, key + sizeof("TEST")-1);
1368 mode = strtol(attr, NULL, 8);
1369 rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode);
1371 rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL);
1376 if (strncmp(key, "RUN", sizeof("RUN")-1) == 0) {
1379 attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1);
1380 if (attr != NULL && strstr(attr, "ignore_error"))
1382 rule_add_key(&rule_tmp, TK_A_RUN, op, value, &flag);
1386 if (strcmp(key, "WAIT_FOR") == 0 || strcmp(key, "WAIT_FOR_SYSFS") == 0) {
1387 rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1391 if (strcmp(key, "LABEL") == 0) {
1392 rule_tmp.rule.rule.label_off = add_string(rules, value);
1396 if (strcmp(key, "GOTO") == 0) {
1397 rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1401 if (strncmp(key, "NAME", sizeof("NAME")-1) == 0) {
1402 if (op < OP_MATCH_MAX) {
1403 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
1405 if (value[0] == '\0')
1406 info(rules->udev, "name empty, node creation suppressed\n");
1407 rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL);
1408 attr = get_key_attribute(rules->udev, key + sizeof("NAME")-1);
1410 if (strstr(attr, "all_partitions") != NULL) {
1411 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1413 dbg(rules->udev, "creation of partition nodes requested\n");
1414 rule_add_key(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1416 if (strstr(attr, "ignore_remove") != NULL) {
1417 dbg(rules->udev, "remove event should be ignored\n");
1418 rule_add_key(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1422 rule_tmp.rule.rule.flags = 1;
1426 if (strcmp(key, "SYMLINK") == 0) {
1427 if (op < OP_MATCH_MAX)
1428 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
1430 rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, NULL);
1431 rule_tmp.rule.rule.flags = 1;
1435 if (strcmp(key, "OWNER") == 0) {
1439 uid = strtoul(value, &endptr, 10);
1440 if (endptr[0] == '\0') {
1441 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1442 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1443 uid = add_uid(rules, value);
1444 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1445 } else if (rules->resolve_names >= 0) {
1446 rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
1448 rule_tmp.rule.rule.flags = 1;
1452 if (strcmp(key, "GROUP") == 0) {
1456 gid = strtoul(value, &endptr, 10);
1457 if (endptr[0] == '\0') {
1458 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1459 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1460 gid = add_gid(rules, value);
1461 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1462 } else if (rules->resolve_names >= 0) {
1463 rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
1465 rule_tmp.rule.rule.flags = 1;
1469 if (strcmp(key, "MODE") == 0) {
1473 mode = strtol(value, &endptr, 8);
1474 if (endptr[0] == '\0')
1475 rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1477 rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
1478 rule_tmp.rule.rule.flags = 1;
1482 if (strcmp(key, "OPTIONS") == 0) {
1485 if (strstr(value, "last_rule") != NULL) {
1486 dbg(rules->udev, "last rule to be applied\n");
1487 rule_add_key(&rule_tmp, TK_A_LAST_RULE, 0, NULL, NULL);
1489 if (strstr(value, "ignore_device") != NULL) {
1490 dbg(rules->udev, "device should be ignored\n");
1491 rule_add_key(&rule_tmp, TK_A_IGNORE_DEVICE, 0, NULL, NULL);
1493 if (strstr(value, "ignore_remove") != NULL) {
1494 dbg(rules->udev, "remove event should be ignored\n");
1495 rule_add_key(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL);
1497 pos = strstr(value, "link_priority=");
1499 int prio = atoi(&pos[strlen("link_priority=")]);
1501 rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, 0, NULL, &prio);
1502 dbg(rules->udev, "link priority=%i\n", prio);
1504 pos = strstr(value, "event_timeout=");
1506 int tout = atoi(&pos[strlen("event_timeout=")]);
1508 rule_add_key(&rule_tmp, TK_A_EVENT_TIMEOUT, 0, NULL, &tout);
1509 dbg(rules->udev, "event timout=%i\n", tout);
1511 pos = strstr(value, "string_escape=");
1513 pos = &pos[strlen("string_escape=")];
1514 if (strncmp(pos, "none", strlen("none")) == 0)
1515 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, 0, NULL, NULL);
1516 else if (strncmp(pos, "replace", strlen("replace")) == 0)
1517 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, 0, NULL, NULL);
1519 if (strstr(value, "all_partitions") != NULL) {
1520 int num = DEFAULT_FAKE_PARTITIONS_COUNT;
1522 rule_add_key(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num);
1523 dbg(rules->udev, "creation of partition nodes requested\n");
1525 pos = strstr(value, "nowatch");
1529 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, 0, NULL, &off);
1530 dbg(rules->udev, "inotify watch of device disabled\n");
1532 pos = strstr(value, "watch");
1536 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, 0, NULL, &on);
1537 dbg(rules->udev, "inotify watch of device requested\n");
1542 err(rules->udev, "unknown key '%s' in %s:%u\n", key, filename, lineno);
1545 /* add rule token */
1546 rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur;
1547 if (add_token(rules, &rule_tmp.rule) != 0)
1550 /* add tokens to list, sorted by type */
1551 if (sort_token(rules, &rule_tmp) != 0)
1556 err(rules->udev, "invalid rule '%s:%u'\n", filename, lineno);
1560 static int parse_file(struct udev_rules *rules, const char *filename, unsigned short filename_off)
1563 unsigned int first_token;
1564 char line[UTIL_LINE_SIZE];
1568 info(rules->udev, "reading '%s' as rules file\n", filename);
1570 f = fopen(filename, "r");
1574 first_token = rules->token_cur;
1576 while(fgets(line, sizeof(line), f) != NULL) {
1580 /* skip whitespace */
1583 while (isspace(key[0]))
1594 /* continue reading if backslash+newline is found */
1595 while (line[len-2] == '\\') {
1596 if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1602 if (len+1 >= sizeof(line)) {
1603 err(rules->udev, "line too long '%s':%u, ignored\n", filename, line_nr);
1606 add_rule(rules, key, filename, filename_off, line_nr);
1610 /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1611 for (i = first_token+1; i < rules->token_cur; i++) {
1612 if (rules->tokens[i].type == TK_A_GOTO) {
1613 char *label = &rules->buf[rules->tokens[i].key.value_off];
1616 for (j = i+1; j < rules->token_cur; j++) {
1617 if (rules->tokens[j].type != TK_RULE)
1619 if (rules->tokens[j].rule.label_off == 0)
1621 if (strcmp(label, &rules->buf[rules->tokens[j].rule.label_off]) != 0)
1623 rules->tokens[i].key.rule_goto = j;
1626 if (rules->tokens[i].key.rule_goto == 0)
1627 err(rules->udev, "GOTO '%s' has no matching label in: '%s'\n", label, filename);
1633 static int add_matching_files(struct udev *udev, struct udev_list_node *file_list, const char *dirname, const char *suffix)
1636 char filename[UTIL_PATH_SIZE];
1638 dbg(udev, "open directory '%s'\n", dirname);
1639 dir = opendir(dirname);
1641 info(udev, "unable to open '%s': %m\n", dirname);
1646 struct dirent *dent;
1648 dent = readdir(dir);
1649 if (dent == NULL || dent->d_name[0] == '\0')
1652 if (dent->d_name[0] == '.')
1655 /* look for file matching with specified suffix */
1656 if (suffix != NULL) {
1659 ext = strrchr(dent->d_name, '.');
1662 if (strcmp(ext, suffix) != 0)
1665 util_strscpyl(filename, sizeof(filename), dirname, "/", dent->d_name, NULL);
1666 dbg(udev, "put file '%s' into list\n", filename);
1667 udev_list_entry_add(udev, file_list, filename, NULL, 1, 1);
1674 struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
1676 struct udev_rules *rules;
1677 struct stat statbuf;
1678 struct udev_list_node file_list;
1679 struct udev_list_entry *file_loop, *file_tmp;
1680 struct token end_token;
1682 rules = malloc(sizeof(struct udev_rules));
1685 memset(rules, 0x00, sizeof(struct udev_rules));
1687 rules->resolve_names = resolve_names;
1688 udev_list_init(&file_list);
1690 /* init token array and string buffer */
1691 rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
1692 if (rules->tokens == NULL)
1694 rules->token_max = PREALLOC_TOKEN;
1696 rules->buf = malloc(PREALLOC_STRBUF);
1697 if (rules->buf == NULL)
1699 rules->buf_max = PREALLOC_STRBUF;
1700 /* offset 0 is always '\0' */
1701 rules->buf[0] = '\0';
1703 dbg(udev, "prealloc %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1704 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1706 rules->trie_nodes = malloc(PREALLOC_TRIE * sizeof(struct trie_node));
1707 if (rules->trie_nodes == NULL)
1709 rules->trie_nodes_max = PREALLOC_TRIE;
1710 /* offset 0 is the trie root, with an empty string */
1711 memset(rules->trie_nodes, 0x00, sizeof(struct trie_node));
1712 rules->trie_nodes_cur = 1;
1714 if (udev_get_rules_path(udev) != NULL) {
1715 /* custom rules location for testing */
1716 add_matching_files(udev, &file_list, udev_get_rules_path(udev), ".rules");
1718 char filename[PATH_MAX];
1719 struct udev_list_node sort_list;
1720 struct udev_list_entry *sort_loop, *sort_tmp;
1722 /* read user/custom rules */
1723 add_matching_files(udev, &file_list, SYSCONFDIR "/udev/rules.d", ".rules");
1725 /* read dynamic/temporary rules */
1726 util_strscpyl(filename, sizeof(filename), udev_get_dev_path(udev), "/.udev/rules.d", NULL);
1727 if (stat(filename, &statbuf) != 0) {
1728 util_create_path(udev, filename);
1729 udev_selinux_setfscreatecon(udev, filename, S_IFDIR|0755);
1730 mkdir(filename, 0755);
1731 udev_selinux_resetfscreatecon(udev);
1733 udev_list_init(&sort_list);
1734 add_matching_files(udev, &sort_list, filename, ".rules");
1736 /* read default rules */
1737 add_matching_files(udev, &sort_list, LIBEXECDIR "/rules.d", ".rules");
1739 /* sort all rules files by basename into list of files */
1740 udev_list_entry_foreach_safe(sort_loop, sort_tmp, udev_list_get_entry(&sort_list)) {
1741 const char *sort_name = udev_list_entry_get_name(sort_loop);
1742 const char *sort_base = strrchr(sort_name, '/');
1744 if (sort_base == NULL)
1746 /* sort entry into existing list */
1747 udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1748 const char *file_name = udev_list_entry_get_name(file_loop);
1749 const char *file_base = strrchr(file_name, '/');
1751 if (file_base == NULL)
1753 if (strcmp(file_base, sort_base) == 0) {
1754 info(udev, "rule file basename '%s' already added, ignoring '%s'\n",
1755 file_name, sort_name);
1756 udev_list_entry_delete(sort_loop);
1760 if (strcmp(file_base, sort_base) > 0) {
1761 /* found later file, insert before */
1762 udev_list_entry_remove(sort_loop);
1763 udev_list_entry_insert_before(sort_loop, file_loop);
1768 /* current file already handled */
1769 if (sort_loop == NULL)
1771 /* no later file, append to end of list */
1772 udev_list_entry_remove(sort_loop);
1773 udev_list_entry_append(sort_loop, &file_list);
1777 /* add all filenames to the string buffer */
1778 udev_list_entry_foreach(file_loop, udev_list_get_entry(&file_list)) {
1779 const char *filename = udev_list_entry_get_name(file_loop);
1780 unsigned int filename_off;
1782 filename_off = add_string(rules, filename);
1783 /* the offset in the rule is limited to unsigned short */
1784 if (filename_off < USHRT_MAX)
1785 udev_list_entry_set_flag(file_loop, filename_off);
1788 /* parse list of files */
1789 udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1790 const char *filename = udev_list_entry_get_name(file_loop);
1791 unsigned int filename_off = udev_list_entry_get_flag(file_loop);
1793 if (stat(filename, &statbuf) == 0 && statbuf.st_size > 0)
1794 parse_file(rules, filename, filename_off);
1796 info(udev, "can not read '%s'\n", filename);
1797 udev_list_entry_delete(file_loop);
1800 memset(&end_token, 0x00, sizeof(struct token));
1801 end_token.type = TK_END;
1802 add_token(rules, &end_token);
1804 /* shrink allocated token and string buffer */
1805 if (rules->token_cur < rules->token_max) {
1806 struct token *tokens;
1808 tokens = realloc(rules->tokens, rules->token_cur * sizeof(struct token));
1809 if (tokens != NULL || rules->token_cur == 0) {
1810 rules->tokens = tokens;
1811 rules->token_max = rules->token_cur;
1814 if (rules->buf_cur < rules->buf_max) {
1817 buf = realloc(rules->buf, rules->buf_cur);
1818 if (buf != NULL || rules->buf_cur == 0) {
1820 rules->buf_max = rules->buf_cur;
1823 info(udev, "rules use %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1824 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1825 info(udev, "temporary index used %zu bytes (%u * %zu bytes)\n",
1826 rules->trie_nodes_cur * sizeof(struct trie_node),
1827 rules->trie_nodes_cur, sizeof(struct trie_node));
1830 free(rules->trie_nodes);
1831 rules->trie_nodes = NULL;
1832 rules->trie_nodes_cur = 0;
1833 rules->trie_nodes_max = 0;
1835 /* cleanup uid/gid cache */
1838 rules->uids_cur = 0;
1839 rules->uids_max = 0;
1842 rules->gids_cur = 0;
1843 rules->gids_max = 0;
1849 void udev_rules_unref(struct udev_rules *rules)
1853 free(rules->tokens);
1855 free(rules->trie_nodes);
1861 static int match_key(struct udev_rules *rules, struct token *token, const char *val)
1863 char *key_value = &rules->buf[token->key.value_off];
1870 switch (token->key.glob) {
1872 match = (strcmp(key_value, val) == 0);
1875 match = (fnmatch(key_value, val, 0) == 0);
1882 split = &rules->buf[token->key.value_off];
1887 next = strchr(split, '|');
1889 size_t matchlen = (size_t)(next - split);
1891 match = (matchlen == len && strncmp(split, val, matchlen) == 0);
1895 match = (strcmp(split, val) == 0);
1904 char value[UTIL_PATH_SIZE];
1906 util_strscpy(value, sizeof(value), &rules->buf[token->key.value_off]);
1908 while (key_value != NULL) {
1909 pos = strchr(key_value, '|');
1914 dbg(rules->udev, "match %s '%s' <-> '%s'\n", token_str(token->type), key_value, val);
1915 match = (fnmatch(key_value, val, 0) == 0);
1923 match = (val[0] != '\0');
1929 if (match && (token->key.op == OP_MATCH)) {
1930 dbg(rules->udev, "%s is true (matching value)\n", token_str(token->type));
1933 if (!match && (token->key.op == OP_NOMATCH)) {
1934 dbg(rules->udev, "%s is true (non-matching value)\n", token_str(token->type));
1937 dbg(rules->udev, "%s is not true\n", token_str(token->type));
1941 static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur)
1944 char nbuf[UTIL_NAME_SIZE];
1946 char vbuf[UTIL_NAME_SIZE];
1949 name = &rules->buf[cur->key.attr_off];
1950 switch (cur->key.attrsubst) {
1952 udev_event_apply_format(event, name, nbuf, sizeof(nbuf));
1956 value = udev_device_get_sysattr_value(dev, name);
1961 if (util_resolve_subsys_kernel(event->udev, name, vbuf, sizeof(vbuf), 1) != 0)
1969 /* remove trailing whitespace, if not asked to match for it */
1970 len = strlen(value);
1971 if (len > 0 && isspace(value[len-1])) {
1972 const char *key_value;
1975 key_value = &rules->buf[cur->key.value_off];
1976 klen = strlen(key_value);
1977 if (klen > 0 && !isspace(key_value[klen-1])) {
1978 if (value != vbuf) {
1979 util_strscpy(vbuf, sizeof(vbuf), value);
1982 while (len > 0 && isspace(vbuf[--len]))
1984 dbg(rules->udev, "removed trailing whitespace from '%s'\n", value);
1988 return match_key(rules, cur, value);
1997 int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event)
2001 enum escape_type esc = ESCAPE_UNSET;
2004 if (rules->tokens == NULL)
2007 can_set_name = ((strcmp(udev_device_get_action(event->dev), "add") == 0 ||
2008 strcmp(udev_device_get_action(event->dev), "change") == 0) &&
2009 (major(udev_device_get_devnum(event->dev)) > 0 ||
2010 strcmp(udev_device_get_subsystem(event->dev), "net") == 0));
2012 /* loop through token list, match, run actions or forward to next rule */
2013 cur = &rules->tokens[0];
2016 dump_token(rules, cur);
2017 switch (cur->type) {
2021 /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
2022 if (!can_set_name && rule->rule.flags)
2027 if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
2031 if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
2035 if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
2040 size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
2041 struct udev_list_entry *list_entry;
2044 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
2045 const char *devlink;
2047 devlink = &udev_list_entry_get_name(list_entry)[devlen];
2048 if (match_key(rules, cur, devlink) == 0) {
2058 if (match_key(rules, cur, event->name) != 0)
2063 const char *key_name = &rules->buf[cur->key.attr_off];
2066 value = udev_device_get_property_value(event->dev, key_name);
2067 if (value == NULL) {
2068 dbg(event->udev, "ENV{%s} is not set, treat as empty\n", key_name);
2071 if (match_key(rules, cur, value))
2075 case TK_M_SUBSYSTEM:
2076 if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
2080 if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
2085 char filename[UTIL_PATH_SIZE];
2088 udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename));
2089 found = (wait_for_file(event->dev, filename, 10) == 0);
2090 if (!found && (cur->key.op != OP_NOMATCH))
2095 if (match_attr(rules, event->dev, event, cur) != 0)
2099 case TK_M_SUBSYSTEMS:
2105 /* get whole sequence of parent matches */
2107 while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX)
2110 /* loop over parents */
2111 event->dev_parent = event->dev;
2115 dbg(event->udev, "parent: '%s'\n", udev_device_get_syspath(event->dev_parent));
2116 /* loop over sequence of parent match keys */
2117 for (key = cur; key < next; key++ ) {
2118 dump_token(rules, key);
2121 if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
2124 case TK_M_SUBSYSTEMS:
2125 if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
2129 if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
2133 if (match_attr(rules, event->dev_parent, event, key) != 0)
2139 dbg(event->udev, "parent key matched\n");
2141 dbg(event->udev, "all parent keys matched\n");
2142 /* all keys matched */
2146 event->dev_parent = udev_device_get_parent(event->dev_parent);
2147 if (event->dev_parent == NULL)
2150 /* move behind our sequence of parent match keys */
2156 char filename[UTIL_PATH_SIZE];
2157 struct stat statbuf;
2160 udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename));
2161 if (util_resolve_subsys_kernel(event->udev, filename, filename, sizeof(filename), 0) != 0) {
2162 if (filename[0] != '/') {
2163 char tmp[UTIL_PATH_SIZE];
2165 util_strscpy(tmp, sizeof(tmp), filename);
2166 util_strscpyl(filename, sizeof(filename),
2167 udev_device_get_syspath(event->dev), "/", tmp, NULL);
2170 attr_subst_subdir(filename, sizeof(filename));
2172 match = (stat(filename, &statbuf) == 0);
2173 dbg(event->udev, "'%s' %s", filename, match ? "exists\n" : "does not exist\n");
2174 if (match && cur->key.mode > 0) {
2175 match = ((statbuf.st_mode & cur->key.mode) > 0);
2176 dbg(event->udev, "'%s' has mode=%#o and %s %#o\n", filename, statbuf.st_mode,
2177 match ? "matches" : "does not match", cur->key.mode);
2179 if (match && cur->key.op == OP_NOMATCH)
2181 if (!match && cur->key.op == OP_MATCH)
2187 char program[UTIL_PATH_SIZE];
2189 char result[UTIL_PATH_SIZE];
2191 free(event->program_result);
2192 event->program_result = NULL;
2193 udev_event_apply_format(event, &rules->buf[cur->key.value_off], program, sizeof(program));
2194 envp = udev_device_get_properties_envp(event->dev);
2195 info(event->udev, "PROGRAM '%s' %s:%u\n",
2197 &rules->buf[rule->rule.filename_off],
2198 rule->rule.filename_line);
2199 if (util_run_program(event->udev, program, envp, result, sizeof(result), NULL) != 0) {
2200 if (cur->key.op != OP_NOMATCH)
2205 util_remove_trailing_chars(result, '\n');
2206 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2207 count = udev_util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
2209 info(event->udev, "%i character(s) replaced\n" , count);
2211 event->program_result = strdup(result);
2212 dbg(event->udev, "storing result '%s'\n", event->program_result);
2213 if (cur->key.op == OP_NOMATCH)
2218 case TK_M_IMPORT_FILE:
2220 char import[UTIL_PATH_SIZE];
2222 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2223 if (import_file_into_properties(event->dev, import) != 0)
2224 if (cur->key.op != OP_NOMATCH)
2228 case TK_M_IMPORT_PROG:
2230 char import[UTIL_PATH_SIZE];
2232 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2233 info(event->udev, "IMPORT '%s' %s:%u\n",
2235 &rules->buf[rule->rule.filename_off],
2236 rule->rule.filename_line);
2237 if (import_program_into_properties(event->dev, import) != 0)
2238 if (cur->key.op != OP_NOMATCH)
2242 case TK_M_IMPORT_PARENT:
2244 char import[UTIL_PATH_SIZE];
2246 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2247 if (import_parent_into_properties(event->dev, import) != 0)
2248 if (cur->key.op != OP_NOMATCH)
2253 if (match_key(rules, cur, event->program_result) != 0)
2257 case TK_A_IGNORE_DEVICE:
2258 event->ignore_device = 1;
2261 case TK_A_STRING_ESCAPE_NONE:
2264 case TK_A_STRING_ESCAPE_REPLACE:
2265 esc = ESCAPE_REPLACE;
2267 case TK_A_NUM_FAKE_PART:
2268 if (strcmp(udev_device_get_subsystem(event->dev), "block") != 0)
2270 if (udev_device_get_sysnum(event->dev) != NULL)
2272 udev_device_set_num_fake_partitions(event->dev, cur->key.num_fake_part);
2274 case TK_A_INOTIFY_WATCH:
2275 event->inotify_watch = cur->key.watch;
2277 case TK_A_DEVLINK_PRIO:
2278 udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
2282 char owner[UTIL_NAME_SIZE];
2284 if (event->owner_final)
2286 if (cur->key.op == OP_ASSIGN_FINAL)
2287 event->owner_final = 1;
2288 udev_event_apply_format(event, &rules->buf[cur->key.value_off], owner, sizeof(owner));
2289 event->uid = util_lookup_user(event->udev, owner);
2290 info(event->udev, "OWNER %u %s:%u\n",
2292 &rules->buf[rule->rule.filename_off],
2293 rule->rule.filename_line);
2298 char group[UTIL_NAME_SIZE];
2300 if (event->group_final)
2302 if (cur->key.op == OP_ASSIGN_FINAL)
2303 event->group_final = 1;
2304 udev_event_apply_format(event, &rules->buf[cur->key.value_off], group, sizeof(group));
2305 event->gid = util_lookup_group(event->udev, group);
2306 info(event->udev, "GROUP %u %s:%u\n",
2308 &rules->buf[rule->rule.filename_off],
2309 rule->rule.filename_line);
2314 char mode[UTIL_NAME_SIZE];
2317 if (event->mode_final)
2319 if (cur->key.op == OP_ASSIGN_FINAL)
2320 event->mode_final = 1;
2321 udev_event_apply_format(event, &rules->buf[cur->key.value_off], mode, sizeof(mode));
2322 event->mode = strtol(mode, &endptr, 8);
2323 if (endptr[0] != '\0') {
2324 err(event->udev, "invalide mode '%s' set default mode 0660\n", mode);
2327 info(event->udev, "MODE %#o %s:%u\n",
2329 &rules->buf[rule->rule.filename_off],
2330 rule->rule.filename_line);
2334 if (event->owner_final)
2336 if (cur->key.op == OP_ASSIGN_FINAL)
2337 event->owner_final = 1;
2338 event->uid = cur->key.uid;
2339 info(event->udev, "OWNER %u %s:%u\n",
2341 &rules->buf[rule->rule.filename_off],
2342 rule->rule.filename_line);
2345 if (event->group_final)
2347 if (cur->key.op == OP_ASSIGN_FINAL)
2348 event->group_final = 1;
2349 event->gid = cur->key.gid;
2350 info(event->udev, "GROUP %u %s:%u\n",
2352 &rules->buf[rule->rule.filename_off],
2353 rule->rule.filename_line);
2356 if (event->mode_final)
2358 if (cur->key.op == OP_ASSIGN_FINAL)
2359 event->mode_final = 1;
2360 event->mode = cur->key.mode;
2361 info(event->udev, "MODE %#o %s:%u\n",
2363 &rules->buf[rule->rule.filename_off],
2364 rule->rule.filename_line);
2368 const char *name = &rules->buf[cur->key.attr_off];
2369 char *value = &rules->buf[cur->key.value_off];
2371 if (value[0] != '\0') {
2372 char temp_value[UTIL_NAME_SIZE];
2373 struct udev_list_entry *entry;
2375 udev_event_apply_format(event, value, temp_value, sizeof(temp_value));
2376 entry = udev_device_add_property(event->dev, name, temp_value);
2378 udev_list_entry_set_flag(entry, 1);
2380 udev_device_add_property(event->dev, name, NULL);
2386 const char *name = &rules->buf[cur->key.value_off];
2387 char name_str[UTIL_PATH_SIZE];
2390 if (event->name_final)
2392 if (cur->key.op == OP_ASSIGN_FINAL)
2393 event->name_final = 1;
2394 udev_event_apply_format(event, name, name_str, sizeof(name_str));
2395 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2396 count = udev_util_replace_chars(name_str, "/");
2398 info(event->udev, "%i character(s) replaced\n", count);
2401 event->name = strdup(name_str);
2402 info(event->udev, "NAME '%s' %s:%u\n",
2404 &rules->buf[rule->rule.filename_off],
2405 rule->rule.filename_line);
2410 char temp[UTIL_PATH_SIZE];
2411 char filename[UTIL_PATH_SIZE];
2415 if (event->devlink_final)
2417 if (major(udev_device_get_devnum(event->dev)) == 0)
2419 if (cur->key.op == OP_ASSIGN_FINAL)
2420 event->devlink_final = 1;
2421 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2422 udev_device_cleanup_devlinks_list(event->dev);
2424 /* allow multiple symlinks separated by spaces */
2425 udev_event_apply_format(event, &rules->buf[cur->key.value_off], temp, sizeof(temp));
2426 if (esc == ESCAPE_UNSET)
2427 count = udev_util_replace_chars(temp, "/ ");
2428 else if (esc == ESCAPE_REPLACE)
2429 count = udev_util_replace_chars(temp, "/");
2431 info(event->udev, "%i character(s) replaced\n" , count);
2432 dbg(event->udev, "rule applied, added symlink(s) '%s'\n", temp);
2434 while (isspace(pos[0]))
2436 next = strchr(pos, ' ');
2439 info(event->udev, "LINK '%s' %s:%u\n",
2441 &rules->buf[rule->rule.filename_off],
2442 rule->rule.filename_line);
2443 util_strscpyl(filename, sizeof(filename), udev_get_dev_path(event->udev), "/", pos, NULL);
2444 udev_device_add_devlink(event->dev, filename);
2445 while (isspace(next[1]))
2448 next = strchr(pos, ' ');
2450 if (pos[0] != '\0') {
2451 info(event->udev, "LINK '%s' %s:%u\n",
2453 &rules->buf[rule->rule.filename_off],
2454 rule->rule.filename_line);
2455 util_strscpyl(filename, sizeof(filename), udev_get_dev_path(event->udev), "/", pos, NULL);
2456 udev_device_add_devlink(event->dev, filename);
2460 case TK_A_EVENT_TIMEOUT:
2461 udev_device_set_event_timeout(event->dev, cur->key.event_timeout);
2463 case TK_A_IGNORE_REMOVE:
2464 udev_device_set_ignore_remove(event->dev, 1);
2468 const char *key_name = &rules->buf[cur->key.attr_off];
2469 char attr[UTIL_PATH_SIZE];
2470 char value[UTIL_NAME_SIZE];
2473 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0)
2474 util_strscpyl(attr, sizeof(attr), udev_device_get_syspath(event->dev), "/", key_name, NULL);
2475 attr_subst_subdir(attr, sizeof(attr));
2477 udev_event_apply_format(event, &rules->buf[cur->key.value_off], value, sizeof(value));
2478 info(event->udev, "ATTR '%s' writing '%s' %s:%u\n", attr, value,
2479 &rules->buf[rule->rule.filename_off],
2480 rule->rule.filename_line);
2481 f = fopen(attr, "w");
2483 if (fprintf(f, "%s", value) <= 0)
2484 err(event->udev, "error writing ATTR{%s}: %m\n", attr);
2487 err(event->udev, "error opening ATTR{%s} for writing: %m\n", attr);
2493 struct udev_list_entry *list_entry;
2495 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2496 udev_list_cleanup_entries(event->udev, &event->run_list);
2497 info(event->udev, "RUN '%s' %s:%u\n",
2498 &rules->buf[cur->key.value_off],
2499 &rules->buf[rule->rule.filename_off],
2500 rule->rule.filename_line);
2501 list_entry = udev_list_entry_add(event->udev, &event->run_list,
2502 &rules->buf[cur->key.value_off], NULL, 1, 0);
2503 if (cur->key.ignore_error)
2504 udev_list_entry_set_flag(list_entry, 1);
2508 if (cur->key.rule_goto == 0)
2510 cur = &rules->tokens[cur->key.rule_goto];
2512 case TK_A_LAST_RULE:
2516 case TK_M_PARENTS_MIN:
2517 case TK_M_PARENTS_MAX:
2520 err(rules->udev, "wrong type %u\n", cur->type);
2527 /* fast-forward to next rule */
2528 cur = rule + rule->rule.token_count;
2529 dbg(rules->udev, "forward to rule: %u\n",
2530 (unsigned int) (cur - rules->tokens));