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 */
129 TK_M_SUBSYSTEM, /* val */
130 TK_M_DRIVER, /* val */
131 TK_M_WAITFOR, /* val */
132 TK_M_ATTR, /* val, attr */
135 TK_M_KERNELS, /* val */
136 TK_M_SUBSYSTEMS, /* val */
137 TK_M_DRIVERS, /* val */
138 TK_M_ATTRS, /* val, attr */
142 TK_M_TEST, /* val, mode_t */
143 TK_M_EVENT_TIMEOUT, /* int */
144 TK_M_PROGRAM, /* val */
145 TK_M_IMPORT_FILE, /* val */
146 TK_M_IMPORT_PROG, /* val */
147 TK_M_IMPORT_BUILTIN, /* val */
148 TK_M_IMPORT_DB, /* val */
149 TK_M_IMPORT_CMDLINE, /* val */
150 TK_M_IMPORT_PARENT, /* val */
151 TK_M_RESULT, /* val */
154 TK_A_STRING_ESCAPE_NONE,
155 TK_A_STRING_ESCAPE_REPLACE,
157 TK_A_INOTIFY_WATCH, /* int */
158 TK_A_DEVLINK_PRIO, /* int */
159 TK_A_OWNER, /* val */
160 TK_A_GROUP, /* val */
162 TK_A_OWNER_ID, /* uid_t */
163 TK_A_GROUP_ID, /* gid_t */
164 TK_A_MODE_ID, /* mode_t */
165 TK_A_STATIC_NODE, /* val */
166 TK_A_ENV, /* val, attr */
169 TK_A_DEVLINK, /* val */
170 TK_A_ATTR, /* val, attr */
171 TK_A_RUN, /* val, bool */
172 TK_A_GOTO, /* size_t */
177 /* we try to pack stuff in a way that we take only 12 bytes per token */
180 unsigned char type; /* same in rule and key */
182 enum token_type type:8;
184 bool has_static_node:1;
185 unsigned int unused:6;
186 unsigned short token_count;
187 unsigned int label_off;
188 unsigned short filename_off;
189 unsigned short filename_line;
192 enum token_type type:8;
193 enum operation_type op:8;
194 enum string_glob_type glob:8;
195 enum string_subst_type subst:4;
196 enum string_subst_type attrsubst:4;
197 unsigned int value_off;
199 unsigned int attr_off;
202 unsigned int rule_goto;
209 enum udev_builtin_cmd builtin_cmd;
217 struct udev_rules *rules;
219 struct token token[MAX_TK];
220 unsigned int token_cur;
224 static const char *operation_str(enum operation_type type)
226 static const char *operation_strs[] = {
227 [OP_UNSET] = "UNSET",
228 [OP_MATCH] = "match",
229 [OP_NOMATCH] = "nomatch",
230 [OP_MATCH_MAX] = "MATCH_MAX",
233 [OP_ASSIGN] = "assign",
234 [OP_ASSIGN_FINAL] = "assign-final",
237 return operation_strs[type];
240 static const char *string_glob_str(enum string_glob_type type)
242 static const char *string_glob_strs[] = {
243 [GL_UNSET] = "UNSET",
244 [GL_PLAIN] = "plain",
246 [GL_SPLIT] = "split",
247 [GL_SPLIT_GLOB] = "split-glob",
248 [GL_SOMETHING] = "split-glob",
251 return string_glob_strs[type];
254 static const char *token_str(enum token_type type)
256 static const char *token_strs[] = {
257 [TK_UNSET] = "UNSET",
260 [TK_M_ACTION] = "M ACTION",
261 [TK_M_DEVPATH] = "M DEVPATH",
262 [TK_M_KERNEL] = "M KERNEL",
263 [TK_M_DEVLINK] = "M DEVLINK",
264 [TK_M_NAME] = "M NAME",
265 [TK_M_ENV] = "M ENV",
266 [TK_M_TAG] = "M TAG",
267 [TK_M_SUBSYSTEM] = "M SUBSYSTEM",
268 [TK_M_DRIVER] = "M DRIVER",
269 [TK_M_WAITFOR] = "M WAITFOR",
270 [TK_M_ATTR] = "M ATTR",
272 [TK_M_PARENTS_MIN] = "M PARENTS_MIN",
273 [TK_M_KERNELS] = "M KERNELS",
274 [TK_M_SUBSYSTEMS] = "M SUBSYSTEMS",
275 [TK_M_DRIVERS] = "M DRIVERS",
276 [TK_M_ATTRS] = "M ATTRS",
277 [TK_M_TAGS] = "M TAGS",
278 [TK_M_PARENTS_MAX] = "M PARENTS_MAX",
280 [TK_M_TEST] = "M TEST",
281 [TK_M_EVENT_TIMEOUT] = "M EVENT_TIMEOUT",
282 [TK_M_PROGRAM] = "M PROGRAM",
283 [TK_M_IMPORT_FILE] = "M IMPORT_FILE",
284 [TK_M_IMPORT_PROG] = "M IMPORT_PROG",
285 [TK_M_IMPORT_BUILTIN] = "M IMPORT_BUILTIN",
286 [TK_M_IMPORT_DB] = "M IMPORT_DB",
287 [TK_M_IMPORT_CMDLINE] = "M IMPORT_CMDLINE",
288 [TK_M_IMPORT_PARENT] = "M IMPORT_PARENT",
289 [TK_M_RESULT] = "M RESULT",
290 [TK_M_MAX] = "M MAX",
292 [TK_A_STRING_ESCAPE_NONE] = "A STRING_ESCAPE_NONE",
293 [TK_A_STRING_ESCAPE_REPLACE] = "A STRING_ESCAPE_REPLACE",
294 [TK_A_DB_PERSIST] = "A DB_PERSIST",
295 [TK_A_INOTIFY_WATCH] = "A INOTIFY_WATCH",
296 [TK_A_DEVLINK_PRIO] = "A DEVLINK_PRIO",
297 [TK_A_OWNER] = "A OWNER",
298 [TK_A_GROUP] = "A GROUP",
299 [TK_A_MODE] = "A MODE",
300 [TK_A_OWNER_ID] = "A OWNER_ID",
301 [TK_A_GROUP_ID] = "A GROUP_ID",
302 [TK_A_STATIC_NODE] = "A STATIC_NODE",
303 [TK_A_MODE_ID] = "A MODE_ID",
304 [TK_A_ENV] = "A ENV",
305 [TK_A_TAG] = "A ENV",
306 [TK_A_NAME] = "A NAME",
307 [TK_A_DEVLINK] = "A DEVLINK",
308 [TK_A_ATTR] = "A ATTR",
309 [TK_A_RUN] = "A RUN",
310 [TK_A_GOTO] = "A GOTO",
315 return token_strs[type];
318 static void dump_token(struct udev_rules *rules, struct token *token)
320 enum token_type type = token->type;
321 enum operation_type op = token->key.op;
322 enum string_glob_type glob = token->key.glob;
323 const char *value = &rules->buf[token->key.value_off];
324 const char *attr = &rules->buf[token->key.attr_off];
329 const char *tks_ptr = (char *)rules->tokens;
330 const char *tk_ptr = (char *)token;
331 unsigned int idx = (tk_ptr - tks_ptr) / sizeof(struct token);
333 dbg(rules->udev, "* RULE %s:%u, token: %u, count: %u, label: '%s'\n",
334 &rules->buf[token->rule.filename_off], token->rule.filename_line,
335 idx, token->rule.token_count,
336 &rules->buf[token->rule.label_off]);
348 case TK_M_SUBSYSTEMS:
352 case TK_M_IMPORT_FILE:
353 case TK_M_IMPORT_PROG:
355 case TK_M_IMPORT_CMDLINE:
356 case TK_M_IMPORT_PARENT:
364 dbg(rules->udev, "%s %s '%s'(%s)\n",
365 token_str(type), operation_str(op), value, string_glob_str(glob));
367 case TK_M_IMPORT_BUILTIN:
368 dbg(rules->udev, "%s %i\n", token_str(type), token->key.builtin_cmd);
375 dbg(rules->udev, "%s %s '%s' '%s'(%s)\n",
376 token_str(type), operation_str(op), attr, value, string_glob_str(glob));
380 dbg(rules->udev, "%s %s '%s'\n", token_str(type), operation_str(op), value);
382 case TK_A_STRING_ESCAPE_NONE:
383 case TK_A_STRING_ESCAPE_REPLACE:
384 case TK_A_DB_PERSIST:
385 dbg(rules->udev, "%s\n", token_str(type));
388 dbg(rules->udev, "%s %s '%s'(%s) %#o\n",
389 token_str(type), operation_str(op), value, string_glob_str(glob), token->key.mode);
391 case TK_A_INOTIFY_WATCH:
392 dbg(rules->udev, "%s %u\n", token_str(type), token->key.watch);
394 case TK_A_DEVLINK_PRIO:
395 dbg(rules->udev, "%s %u\n", token_str(type), token->key.devlink_prio);
398 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.uid);
401 dbg(rules->udev, "%s %s %u\n", token_str(type), operation_str(op), token->key.gid);
404 dbg(rules->udev, "%s %s %#o\n", token_str(type), operation_str(op), token->key.mode);
406 case TK_A_STATIC_NODE:
407 dbg(rules->udev, "%s '%s'\n", token_str(type), value);
409 case TK_M_EVENT_TIMEOUT:
410 dbg(rules->udev, "%s %u\n", token_str(type), token->key.event_timeout);
413 dbg(rules->udev, "%s '%s' %u\n", token_str(type), value, token->key.rule_goto);
416 dbg(rules->udev, "* %s\n", token_str(type));
418 case TK_M_PARENTS_MIN:
419 case TK_M_PARENTS_MAX:
422 dbg(rules->udev, "unknown type %u\n", type);
427 static void dump_rules(struct udev_rules *rules)
431 dbg(rules->udev, "dumping %u (%zu bytes) tokens, %u (%zu bytes) strings\n",
433 rules->token_cur * sizeof(struct token),
436 for(i = 0; i < rules->token_cur; i++)
437 dump_token(rules, &rules->tokens[i]);
440 static inline const char *operation_str(enum operation_type type) { return NULL; }
441 static inline const char *token_str(enum token_type type) { return NULL; }
442 static inline void dump_token(struct udev_rules *rules, struct token *token) {}
443 static inline void dump_rules(struct udev_rules *rules) {}
444 #endif /* ENABLE_DEBUG */
446 static int add_new_string(struct udev_rules *rules, const char *str, size_t bytes)
450 /* grow buffer if needed */
451 if (rules->buf_cur + bytes+1 >= rules->buf_max) {
455 /* double the buffer size */
456 add = rules->buf_max;
460 buf = realloc(rules->buf, rules->buf_max + add);
463 dbg(rules->udev, "extend buffer from %zu to %zu\n", rules->buf_max, rules->buf_max + add);
465 rules->buf_max += add;
467 off = rules->buf_cur;
468 memcpy(&rules->buf[rules->buf_cur], str, bytes);
469 rules->buf_cur += bytes;
474 static int add_string(struct udev_rules *rules, const char *str)
476 unsigned int node_idx;
477 struct trie_node *new_node;
478 unsigned int new_node_idx;
483 struct trie_node *parent;
485 /* walk trie, start from last character of str to find matching tails */
489 for (depth = 0; depth <= len; depth++) {
490 struct trie_node *node;
491 unsigned int child_idx;
493 node = &rules->trie_nodes[node_idx];
494 off = node->value_off + node->value_len - len;
496 /* match against current node */
497 if (depth == len || (node->value_len >= len && memcmp(&rules->buf[off], str, len) == 0))
500 /* lookup child node */
501 key = str[len - 1 - depth];
502 child_idx = node->child_idx;
503 while (child_idx > 0) {
504 struct trie_node *child;
506 child = &rules->trie_nodes[child_idx];
507 if (child->key == key)
509 child_idx = child->next_child_idx;
513 node_idx = child_idx;
516 /* string not found, add it */
517 off = add_new_string(rules, str, len + 1);
519 /* grow trie nodes if needed */
520 if (rules->trie_nodes_cur >= rules->trie_nodes_max) {
521 struct trie_node *nodes;
524 /* double the buffer size */
525 add = rules->trie_nodes_max;
529 nodes = realloc(rules->trie_nodes, (rules->trie_nodes_max + add) * sizeof(struct trie_node));
532 dbg(rules->udev, "extend trie nodes from %u to %u\n",
533 rules->trie_nodes_max, rules->trie_nodes_max + add);
534 rules->trie_nodes = nodes;
535 rules->trie_nodes_max += add;
539 new_node_idx = rules->trie_nodes_cur;
540 rules->trie_nodes_cur++;
541 new_node = &rules->trie_nodes[new_node_idx];
542 memset(new_node, 0x00, sizeof(struct trie_node));
543 new_node->value_off = off;
544 new_node->value_len = len;
547 /* join the parent's child list */
548 parent = &rules->trie_nodes[node_idx];
549 if (parent->child_idx == 0) {
550 parent->child_idx = new_node_idx;
552 struct trie_node *last_child;
554 last_child = &rules->trie_nodes[parent->last_child_idx];
555 last_child->next_child_idx = new_node_idx;
557 parent->last_child_idx = new_node_idx;
561 static int add_token(struct udev_rules *rules, struct token *token)
563 /* grow buffer if needed */
564 if (rules->token_cur+1 >= rules->token_max) {
565 struct token *tokens;
568 /* double the buffer size */
569 add = rules->token_max;
573 tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
576 dbg(rules->udev, "extend tokens from %u to %u\n", rules->token_max, rules->token_max + add);
577 rules->tokens = tokens;
578 rules->token_max += add;
580 memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
585 static uid_t add_uid(struct udev_rules *rules, const char *owner)
591 /* lookup, if we know it already */
592 for (i = 0; i < rules->uids_cur; i++) {
593 off = rules->uids[i].name_off;
594 if (strcmp(&rules->buf[off], owner) == 0) {
595 uid = rules->uids[i].uid;
596 dbg(rules->udev, "return existing %u for '%s'\n", uid, owner);
600 uid = util_lookup_user(rules->udev, owner);
602 /* grow buffer if needed */
603 if (rules->uids_cur+1 >= rules->uids_max) {
604 struct uid_gid *uids;
607 /* double the buffer size */
608 add = rules->uids_max;
612 uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
615 dbg(rules->udev, "extend uids from %u to %u\n", rules->uids_max, rules->uids_max + add);
617 rules->uids_max += add;
619 rules->uids[rules->uids_cur].uid = uid;
620 off = add_string(rules, owner);
623 rules->uids[rules->uids_cur].name_off = off;
628 static gid_t add_gid(struct udev_rules *rules, const char *group)
634 /* lookup, if we know it already */
635 for (i = 0; i < rules->gids_cur; i++) {
636 off = rules->gids[i].name_off;
637 if (strcmp(&rules->buf[off], group) == 0) {
638 gid = rules->gids[i].gid;
639 dbg(rules->udev, "return existing %u for '%s'\n", gid, group);
643 gid = util_lookup_group(rules->udev, group);
645 /* grow buffer if needed */
646 if (rules->gids_cur+1 >= rules->gids_max) {
647 struct uid_gid *gids;
650 /* double the buffer size */
651 add = rules->gids_max;
655 gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid));
658 dbg(rules->udev, "extend gids from %u to %u\n", rules->gids_max, rules->gids_max + add);
660 rules->gids_max += add;
662 rules->gids[rules->gids_cur].gid = gid;
663 off = add_string(rules, group);
666 rules->gids[rules->gids_cur].name_off = off;
671 static int import_property_from_string(struct udev_device *dev, char *line)
673 struct udev *udev = udev_device_get_udev(dev);
680 while (isspace(key[0]))
683 /* comment or empty line */
684 if (key[0] == '#' || key[0] == '\0')
687 /* split key/value */
688 val = strchr(key, '=');
695 while (isspace(val[0]))
702 while (isspace(key[len-1]))
706 /* terminate value */
710 while (isspace(val[len-1]))
718 if (val[0] == '"' || val[0] == '\'') {
719 if (val[len-1] != val[0]) {
720 info(udev, "inconsistent quoting: '%s', skip\n", line);
727 dbg(udev, "adding '%s'='%s'\n", key, val);
729 /* handle device, renamed by external tool, returning new path */
730 if (strcmp(key, "DEVPATH") == 0) {
731 char syspath[UTIL_PATH_SIZE];
733 info(udev, "updating devpath from '%s' to '%s'\n",
734 udev_device_get_devpath(dev), val);
735 util_strscpyl(syspath, sizeof(syspath), udev_get_sys_path(udev), val, NULL);
736 udev_device_set_syspath(dev, syspath);
738 struct udev_list_entry *entry;
740 entry = udev_device_add_property(dev, key, val);
741 /* store in db, skip private keys */
743 udev_list_entry_set_num(entry, true);
748 static int import_file_into_properties(struct udev_device *dev, const char *filename)
751 char line[UTIL_LINE_SIZE];
753 f = fopen(filename, "r");
756 while (fgets(line, sizeof(line), f) != NULL)
757 import_property_from_string(dev, line);
762 static int import_program_into_properties(struct udev_event *event, const char *program, const sigset_t *sigmask)
764 struct udev_device *dev = event->dev;
766 char result[UTIL_LINE_SIZE];
770 envp = udev_device_get_properties_envp(dev);
771 err = udev_event_spawn(event, program, envp, sigmask, result, sizeof(result));
776 while (line != NULL) {
779 pos = strchr(line, '\n');
784 import_property_from_string(dev, line);
790 static int import_parent_into_properties(struct udev_device *dev, const char *filter)
792 struct udev *udev = udev_device_get_udev(dev);
793 struct udev_device *dev_parent;
794 struct udev_list_entry *list_entry;
796 dev_parent = udev_device_get_parent(dev);
797 if (dev_parent == NULL)
800 dbg(udev, "found parent '%s', get the node name\n", udev_device_get_syspath(dev_parent));
801 udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
802 const char *key = udev_list_entry_get_name(list_entry);
803 const char *val = udev_list_entry_get_value(list_entry);
805 if (fnmatch(filter, key, 0) == 0) {
806 struct udev_list_entry *entry;
808 dbg(udev, "import key '%s=%s'\n", key, val);
809 entry = udev_device_add_property(dev, key, val);
810 /* store in db, skip private keys */
812 udev_list_entry_set_num(entry, true);
818 #define WAIT_LOOP_PER_SECOND 50
819 static int wait_for_file(struct udev_device *dev, const char *file, int timeout)
821 struct udev *udev = udev_device_get_udev(dev);
822 char filepath[UTIL_PATH_SIZE];
823 char devicepath[UTIL_PATH_SIZE];
825 int loop = timeout * WAIT_LOOP_PER_SECOND;
827 /* a relative path is a device attribute */
828 devicepath[0] = '\0';
829 if (file[0] != '/') {
830 util_strscpyl(devicepath, sizeof(devicepath),
831 udev_get_sys_path(udev), udev_device_get_devpath(dev), NULL);
832 util_strscpyl(filepath, sizeof(filepath), devicepath, "/", file, NULL);
836 dbg(udev, "will wait %i sec for '%s'\n", timeout, file);
838 const struct timespec duration = { 0, 1000 * 1000 * 1000 / WAIT_LOOP_PER_SECOND };
841 if (stat(file, &stats) == 0) {
842 info(udev, "file '%s' appeared after %i loops\n", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
845 /* make sure, the device did not disappear in the meantime */
846 if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
847 info(udev, "device disappeared while waiting for '%s'\n", file);
850 info(udev, "wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND);
851 nanosleep(&duration, NULL);
853 info(udev, "waiting for '%s' failed\n", file);
857 static int attr_subst_subdir(char *attr, size_t len)
861 if (strstr(attr, "/*/")) {
863 char dirname[UTIL_PATH_SIZE];
867 util_strscpy(dirname, sizeof(dirname), attr);
868 pos = strstr(dirname, "/*/");
873 dir = opendir(dirname);
877 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
880 if (dent->d_name[0] == '.')
882 util_strscpyl(attr, len, dirname, "/", dent->d_name, tail, NULL);
883 if (stat(attr, &stats) == 0) {
895 static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value)
901 if (linepos == NULL || linepos[0] == '\0')
904 /* skip whitespace */
905 while (isspace(linepos[0]) || linepos[0] == ',')
909 if (linepos[0] == '\0')
915 if (linepos[0] == '\0')
917 if (isspace(linepos[0]))
919 if (linepos[0] == '=')
921 if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
922 if (linepos[1] == '=')
926 /* remember end of key */
929 /* skip whitespace after key */
930 while (isspace(linepos[0]))
932 if (linepos[0] == '\0')
935 /* get operation type */
936 if (linepos[0] == '=' && linepos[1] == '=') {
939 } else if (linepos[0] == '!' && linepos[1] == '=') {
942 } else if (linepos[0] == '+' && linepos[1] == '=') {
945 } else if (linepos[0] == '=') {
948 } else if (linepos[0] == ':' && linepos[1] == '=') {
949 *op = OP_ASSIGN_FINAL;
957 /* skip whitespace after operator */
958 while (isspace(linepos[0]))
960 if (linepos[0] == '\0')
964 if (linepos[0] == '"')
971 temp = strchr(linepos, '"');
976 dbg(udev, "%s '%s'-'%s'\n", operation_str(*op), *key, *value);
978 /* move line to next key */
983 /* extract possible KEY{attr} */
984 static char *get_key_attribute(struct udev *udev, char *str)
989 attr = strchr(str, '{');
992 pos = strchr(attr, '}');
994 err(udev, "missing closing brace for format\n");
998 dbg(udev, "attribute='%s'\n", attr);
1004 static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
1005 enum operation_type op,
1006 const char *value, const void *data)
1008 struct token *token = &rule_tmp->token[rule_tmp->token_cur];
1009 const char *attr = NULL;
1011 memset(token, 0x00, sizeof(struct token));
1017 case TK_M_SUBSYSTEM:
1023 case TK_M_SUBSYSTEMS:
1027 case TK_M_IMPORT_FILE:
1028 case TK_M_IMPORT_PROG:
1029 case TK_M_IMPORT_DB:
1030 case TK_M_IMPORT_CMDLINE:
1031 case TK_M_IMPORT_PARENT:
1040 token->key.value_off = add_string(rule_tmp->rules, value);
1042 case TK_M_IMPORT_BUILTIN:
1043 token->key.builtin_cmd = *(enum udev_builtin_cmd *)data;
1051 token->key.value_off = add_string(rule_tmp->rules, value);
1052 token->key.attr_off = add_string(rule_tmp->rules, attr);
1055 token->key.value_off = add_string(rule_tmp->rules, value);
1056 token->key.devlink_unique = *(int *)data;
1059 token->key.value_off = add_string(rule_tmp->rules, value);
1061 token->key.mode = *(mode_t *)data;
1063 case TK_A_STRING_ESCAPE_NONE:
1064 case TK_A_STRING_ESCAPE_REPLACE:
1065 case TK_A_DB_PERSIST:
1068 token->key.value_off = add_string(rule_tmp->rules, value);
1069 token->key.fail_on_error = *(int *)data;
1071 case TK_A_INOTIFY_WATCH:
1072 case TK_A_DEVLINK_PRIO:
1073 token->key.devlink_prio = *(int *)data;
1076 token->key.uid = *(uid_t *)data;
1079 token->key.gid = *(gid_t *)data;
1082 token->key.mode = *(mode_t *)data;
1084 case TK_A_STATIC_NODE:
1085 token->key.value_off = add_string(rule_tmp->rules, value);
1087 case TK_M_EVENT_TIMEOUT:
1088 token->key.event_timeout = *(int *)data;
1091 case TK_M_PARENTS_MIN:
1092 case TK_M_PARENTS_MAX:
1096 err(rule_tmp->rules->udev, "wrong type %u\n", type);
1100 if (value != NULL && type < TK_M_MAX) {
1101 /* check if we need to split or call fnmatch() while matching rules */
1102 enum string_glob_type glob;
1106 has_split = (strchr(value, '|') != NULL);
1107 has_glob = (strchr(value, '*') != NULL || strchr(value, '?') != NULL || strchr(value, '[') != NULL);
1108 if (has_split && has_glob) {
1109 glob = GL_SPLIT_GLOB;
1110 } else if (has_split) {
1112 } else if (has_glob) {
1113 if (strcmp(value, "?*") == 0)
1114 glob = GL_SOMETHING;
1120 token->key.glob = glob;
1123 if (value != NULL && type > TK_M_MAX) {
1124 /* check if assigned value has substitution chars */
1125 if (value[0] == '[')
1126 token->key.subst = SB_SUBSYS;
1127 else if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
1128 token->key.subst = SB_FORMAT;
1130 token->key.subst = SB_NONE;
1134 /* check if property/attribut name has substitution chars */
1136 token->key.attrsubst = SB_SUBSYS;
1137 else if (strchr(attr, '%') != NULL || strchr(attr, '$') != NULL)
1138 token->key.attrsubst = SB_FORMAT;
1140 token->key.attrsubst = SB_NONE;
1143 token->key.type = type;
1145 rule_tmp->token_cur++;
1146 if (rule_tmp->token_cur >= ARRAY_SIZE(rule_tmp->token)) {
1147 err(rule_tmp->rules->udev, "temporary rule array too small\n");
1153 static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp)
1156 unsigned int start = 0;
1157 unsigned int end = rule_tmp->token_cur;
1159 for (i = 0; i < rule_tmp->token_cur; i++) {
1160 enum token_type next_val = TK_UNSET;
1161 unsigned int next_idx = 0;
1164 /* find smallest value */
1165 for (j = start; j < end; j++) {
1166 if (rule_tmp->token[j].type == TK_UNSET)
1168 if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
1169 next_val = rule_tmp->token[j].type;
1174 /* add token and mark done */
1175 if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
1177 rule_tmp->token[next_idx].type = TK_UNSET;
1180 if (next_idx == start)
1182 if (next_idx+1 == end)
1188 static int add_rule(struct udev_rules *rules, char *line,
1189 const char *filename, unsigned int filename_off, unsigned int lineno)
1193 struct rule_tmp rule_tmp;
1194 bool bus_warn = false;
1195 bool sysfs_warn = false;
1196 bool id_warn = false;
1198 memset(&rule_tmp, 0x00, sizeof(struct rule_tmp));
1199 rule_tmp.rules = rules;
1200 rule_tmp.rule.type = TK_RULE;
1201 rule_tmp.rule.rule.filename_off = filename_off;
1202 rule_tmp.rule.rule.filename_line = lineno;
1208 enum operation_type op;
1210 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0)
1213 if (strcmp(key, "ACTION") == 0) {
1214 if (op > OP_MATCH_MAX) {
1215 err(rules->udev, "invalid ACTION operation\n");
1218 rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL);
1222 if (strcmp(key, "DEVPATH") == 0) {
1223 if (op > OP_MATCH_MAX) {
1224 err(rules->udev, "invalid DEVPATH operation\n");
1227 rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
1231 if (strcmp(key, "KERNEL") == 0) {
1232 if (op > OP_MATCH_MAX) {
1233 err(rules->udev, "invalid KERNEL operation\n");
1236 rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL);
1240 if (strcmp(key, "SUBSYSTEM") == 0) {
1241 if (op > OP_MATCH_MAX) {
1242 err(rules->udev, "invalid SUBSYSTEM operation\n");
1245 /* bus, class, subsystem events should all be the same */
1246 if (strcmp(value, "subsystem") == 0 ||
1247 strcmp(value, "bus") == 0 ||
1248 strcmp(value, "class") == 0) {
1249 if (strcmp(value, "bus") == 0 || strcmp(value, "class") == 0)
1250 err(rules->udev, "'%s' must be specified as 'subsystem' \n"
1251 "please fix it in %s:%u", value, filename, lineno);
1252 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
1254 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
1258 if (strcmp(key, "DRIVER") == 0) {
1259 if (op > OP_MATCH_MAX) {
1260 err(rules->udev, "invalid DRIVER operation\n");
1263 rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL);
1267 if (strncmp(key, "ATTR{", sizeof("ATTR{")-1) == 0) {
1268 attr = get_key_attribute(rules->udev, key + sizeof("ATTR")-1);
1270 err(rules->udev, "error parsing ATTR attribute\n");
1273 if (op < OP_MATCH_MAX) {
1274 rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
1276 rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr);
1281 if (strcmp(key, "KERNELS") == 0) {
1282 if (op > OP_MATCH_MAX) {
1283 err(rules->udev, "invalid KERNELS operation\n");
1286 rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1290 if (strcmp(key, "ID") == 0) {
1293 err(rules->udev, "ID= will be removed in a future udev version, "
1294 "please use KERNEL= to match the event device, or KERNELS= "
1295 "to match a parent device, in %s:%u\n", filename, lineno);
1297 if (op > OP_MATCH_MAX) {
1298 err(rules->udev, "invalid KERNELS operation\n");
1301 rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
1305 if (strcmp(key, "SUBSYSTEMS") == 0) {
1306 if (op > OP_MATCH_MAX) {
1307 err(rules->udev, "invalid SUBSYSTEMS operation\n");
1310 rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1314 if (strcmp(key, "BUS") == 0) {
1317 err(rules->udev, "BUS= will be removed in a future udev version, "
1318 "please use SUBSYSTEM= to match the event device, or SUBSYSTEMS= "
1319 "to match a parent device, in %s:%u\n", filename, lineno);
1321 if (op > OP_MATCH_MAX) {
1322 err(rules->udev, "invalid SUBSYSTEMS operation\n");
1325 rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
1329 if (strcmp(key, "DRIVERS") == 0) {
1330 if (op > OP_MATCH_MAX) {
1331 err(rules->udev, "invalid DRIVERS operation\n");
1334 rule_add_key(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
1338 if (strncmp(key, "ATTRS{", sizeof("ATTRS{")-1) == 0) {
1339 if (op > OP_MATCH_MAX) {
1340 err(rules->udev, "invalid ATTRS operation\n");
1343 attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
1345 err(rules->udev, "error parsing ATTRS attribute\n");
1348 if (strncmp(attr, "device/", 7) == 0)
1349 err(rules->udev, "the 'device' link may not be available in a future kernel, "
1350 "please fix it in %s:%u", filename, lineno);
1351 else if (strstr(attr, "../") != NULL)
1352 err(rules->udev, "do not reference parent sysfs directories directly, "
1353 "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
1354 rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1358 if (strcmp(key, "TAGS") == 0) {
1359 if (op > OP_MATCH_MAX) {
1360 err(rules->udev, "invalid TAGS operation\n");
1363 rule_add_key(&rule_tmp, TK_M_TAGS, op, value, NULL);
1367 if (strncmp(key, "SYSFS{", sizeof("SYSFS{")-1) == 0) {
1370 err(rules->udev, "SYSFS{}= will be removed in a future udev version, "
1371 "please use ATTR{}= to match the event device, or ATTRS{}= "
1372 "to match a parent device, in %s:%u\n", filename, lineno);
1374 if (op > OP_MATCH_MAX) {
1375 err(rules->udev, "invalid ATTRS operation\n");
1378 attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1);
1380 err(rules->udev, "error parsing ATTRS attribute\n");
1383 rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
1387 if (strncmp(key, "ENV{", sizeof("ENV{")-1) == 0) {
1388 attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1);
1390 err(rules->udev, "error parsing ENV attribute\n");
1393 if (op < OP_MATCH_MAX) {
1394 if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
1397 static const char *blacklist[] = {
1412 for (i = 0; i < ARRAY_SIZE(blacklist); i++)
1413 if (strcmp(attr, blacklist[i]) == 0) {
1414 err(rules->udev, "invalid ENV attribute, '%s' can not be set %s:%u\n", attr, filename, lineno);
1417 if (rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
1423 if (strcmp(key, "TAG") == 0) {
1424 if (op < OP_MATCH_MAX)
1425 rule_add_key(&rule_tmp, TK_M_TAG, op, value, NULL);
1427 rule_add_key(&rule_tmp, TK_A_TAG, op, value, NULL);
1431 if (strcmp(key, "PROGRAM") == 0) {
1432 rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
1436 if (strcmp(key, "RESULT") == 0) {
1437 if (op > OP_MATCH_MAX) {
1438 err(rules->udev, "invalid RESULT operation\n");
1441 rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL);
1445 if (strncmp(key, "IMPORT", sizeof("IMPORT")-1) == 0) {
1446 attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1);
1448 err(rules->udev, "IMPORT{} type missing, ignoring IMPORT %s:%u\n", filename, lineno);
1451 if (strstr(attr, "program")) {
1452 /* find known built-in command */
1453 if (value[0] != '/') {
1454 char file[UTIL_PATH_SIZE];
1456 enum udev_builtin_cmd cmd;
1458 util_strscpy(file, sizeof(file), value);
1459 pos = strchr(file, ' ');
1462 cmd = udev_builtin_lookup(file);
1463 if (cmd < UDEV_BUILTIN_MAX) {
1464 info(rules->udev, "IMPORT found builtin '%s', replacing %s:%u\n", file, filename, lineno);
1465 rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, NULL, &cmd);
1469 dbg(rules->udev, "IMPORT will be executed\n");
1470 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
1471 } else if (strstr(attr, "builtin")) {
1472 enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
1474 dbg(rules->udev, "IMPORT execute builtin\n");
1475 if (cmd < UDEV_BUILTIN_MAX)
1476 rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, NULL, &cmd);
1478 err(rules->udev, "IMPORT{builtin}: '%s' unknown %s:%u\n", value, filename, lineno);
1479 } else if (strstr(attr, "file")) {
1480 dbg(rules->udev, "IMPORT will be included as file\n");
1481 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
1482 } else if (strstr(attr, "db")) {
1483 dbg(rules->udev, "IMPORT will include db values\n");
1484 rule_add_key(&rule_tmp, TK_M_IMPORT_DB, op, value, NULL);
1485 } else if (strstr(attr, "cmdline")) {
1486 dbg(rules->udev, "IMPORT will include db values\n");
1487 rule_add_key(&rule_tmp, TK_M_IMPORT_CMDLINE, op, value, NULL);
1488 } else if (strstr(attr, "parent")) {
1489 dbg(rules->udev, "IMPORT will include the parent values\n");
1490 rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
1495 if (strncmp(key, "TEST", sizeof("TEST")-1) == 0) {
1498 if (op > OP_MATCH_MAX) {
1499 err(rules->udev, "invalid TEST operation\n");
1502 attr = get_key_attribute(rules->udev, key + sizeof("TEST")-1);
1504 mode = strtol(attr, NULL, 8);
1505 rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode);
1507 rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL);
1512 if (strncmp(key, "RUN", sizeof("RUN")-1) == 0) {
1515 attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1);
1516 if (attr != NULL && strstr(attr, "fail_event_on_error"))
1518 rule_add_key(&rule_tmp, TK_A_RUN, op, value, &flag);
1522 if (strcmp(key, "WAIT_FOR") == 0 || strcmp(key, "WAIT_FOR_SYSFS") == 0) {
1523 rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
1527 if (strcmp(key, "LABEL") == 0) {
1528 rule_tmp.rule.rule.label_off = add_string(rules, value);
1532 if (strcmp(key, "GOTO") == 0) {
1533 rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
1537 if (strncmp(key, "NAME", sizeof("NAME")-1) == 0) {
1538 if (op < OP_MATCH_MAX) {
1539 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
1541 if (strcmp(value, "%k") == 0) {
1542 err(rules->udev, "NAME=\"%%k\" is ignored, because it breaks kernel supplied names, "
1543 "please remove it from %s:%u\n", filename, lineno);
1546 if (value[0] == '\0') {
1547 info(rules->udev, "NAME=\"\" is ignored, because udev will not delete any device nodes, "
1548 "please remove it from %s:%u\n", filename, lineno);
1551 rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL);
1553 rule_tmp.rule.rule.can_set_name = true;
1557 if (strncmp(key, "SYMLINK", sizeof("SYMLINK")-1) == 0) {
1558 if (op < OP_MATCH_MAX) {
1559 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
1563 attr = get_key_attribute(rules->udev, key + sizeof("SYMLINK")-1);
1564 if (attr != NULL && strstr(attr, "unique") != NULL)
1566 rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, &flag);
1568 rule_tmp.rule.rule.can_set_name = true;
1572 if (strcmp(key, "OWNER") == 0) {
1576 uid = strtoul(value, &endptr, 10);
1577 if (endptr[0] == '\0') {
1578 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1579 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1580 uid = add_uid(rules, value);
1581 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
1582 } else if (rules->resolve_names >= 0) {
1583 rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
1585 rule_tmp.rule.rule.can_set_name = true;
1589 if (strcmp(key, "GROUP") == 0) {
1593 gid = strtoul(value, &endptr, 10);
1594 if (endptr[0] == '\0') {
1595 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1596 } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
1597 gid = add_gid(rules, value);
1598 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
1599 } else if (rules->resolve_names >= 0) {
1600 rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
1602 rule_tmp.rule.rule.can_set_name = true;
1606 if (strcmp(key, "MODE") == 0) {
1610 mode = strtol(value, &endptr, 8);
1611 if (endptr[0] == '\0')
1612 rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
1614 rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
1615 rule_tmp.rule.rule.can_set_name = true;
1619 if (strcmp(key, "OPTIONS") == 0) {
1622 pos = strstr(value, "link_priority=");
1624 int prio = atoi(&pos[strlen("link_priority=")]);
1626 rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, op, NULL, &prio);
1627 dbg(rules->udev, "link priority=%i\n", prio);
1630 pos = strstr(value, "event_timeout=");
1632 int tout = atoi(&pos[strlen("event_timeout=")]);
1634 rule_add_key(&rule_tmp, TK_M_EVENT_TIMEOUT, op, NULL, &tout);
1635 dbg(rules->udev, "event timeout=%i\n", tout);
1638 pos = strstr(value, "string_escape=");
1640 pos = &pos[strlen("string_escape=")];
1641 if (strncmp(pos, "none", strlen("none")) == 0)
1642 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, op, NULL, NULL);
1643 else if (strncmp(pos, "replace", strlen("replace")) == 0)
1644 rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, op, NULL, NULL);
1647 pos = strstr(value, "db_persist");
1649 rule_add_key(&rule_tmp, TK_A_DB_PERSIST, op, NULL, NULL);
1651 pos = strstr(value, "nowatch");
1655 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &off);
1656 dbg(rules->udev, "inotify watch of device disabled\n");
1658 pos = strstr(value, "watch");
1662 rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &on);
1663 dbg(rules->udev, "inotify watch of device requested\n");
1667 pos = strstr(value, "static_node=");
1669 rule_add_key(&rule_tmp, TK_A_STATIC_NODE, op, &pos[strlen("static_node=")], NULL);
1670 rule_tmp.rule.rule.has_static_node = true;
1675 err(rules->udev, "unknown key '%s' in %s:%u\n", key, filename, lineno);
1678 /* add rule token */
1679 rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur;
1680 if (add_token(rules, &rule_tmp.rule) != 0)
1683 /* add tokens to list, sorted by type */
1684 if (sort_token(rules, &rule_tmp) != 0)
1689 err(rules->udev, "invalid rule '%s:%u'\n", filename, lineno);
1693 static int parse_file(struct udev_rules *rules, const char *filename, unsigned short filename_off)
1696 unsigned int first_token;
1697 char line[UTIL_LINE_SIZE];
1701 info(rules->udev, "reading '%s' as rules file\n", filename);
1703 f = fopen(filename, "r");
1707 first_token = rules->token_cur;
1709 while (fgets(line, sizeof(line), f) != NULL) {
1713 /* skip whitespace */
1716 while (isspace(key[0]))
1727 /* continue reading if backslash+newline is found */
1728 while (line[len-2] == '\\') {
1729 if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1731 if (strlen(&line[len-2]) < 2)
1737 if (len+1 >= sizeof(line)) {
1738 err(rules->udev, "line too long '%s':%u, ignored\n", filename, line_nr);
1741 add_rule(rules, key, filename, filename_off, line_nr);
1745 /* link GOTOs to LABEL rules in this file to be able to fast-forward */
1746 for (i = first_token+1; i < rules->token_cur; i++) {
1747 if (rules->tokens[i].type == TK_A_GOTO) {
1748 char *label = &rules->buf[rules->tokens[i].key.value_off];
1751 for (j = i+1; j < rules->token_cur; j++) {
1752 if (rules->tokens[j].type != TK_RULE)
1754 if (rules->tokens[j].rule.label_off == 0)
1756 if (strcmp(label, &rules->buf[rules->tokens[j].rule.label_off]) != 0)
1758 rules->tokens[i].key.rule_goto = j;
1761 if (rules->tokens[i].key.rule_goto == 0)
1762 err(rules->udev, "GOTO '%s' has no matching label in: '%s'\n", label, filename);
1768 static int add_matching_files(struct udev *udev, struct udev_list *file_list, const char *dirname, const char *suffix)
1771 struct dirent *dent;
1772 char filename[UTIL_PATH_SIZE];
1774 dbg(udev, "open directory '%s'\n", dirname);
1775 dir = opendir(dirname);
1777 info(udev, "unable to open '%s': %m\n", dirname);
1781 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
1782 if (dent->d_name[0] == '.')
1785 /* look for file matching with specified suffix */
1786 if (suffix != NULL) {
1789 ext = strrchr(dent->d_name, '.');
1792 if (strcmp(ext, suffix) != 0)
1795 util_strscpyl(filename, sizeof(filename), dirname, "/", dent->d_name, NULL);
1796 dbg(udev, "put file '%s' into list\n", filename);
1798 * the basename is the key, the filename the value
1799 * identical basenames from different directories overwrite each other
1800 * entries are sorted after basename
1802 udev_list_entry_add(file_list, dent->d_name, filename);
1809 struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
1811 struct udev_rules *rules;
1812 struct udev_list file_list;
1813 struct udev_list_entry *file_loop;
1814 struct token end_token;
1816 rules = calloc(1, sizeof(struct udev_rules));
1820 rules->resolve_names = resolve_names;
1821 udev_list_init(udev, &file_list, true);
1823 /* init token array and string buffer */
1824 rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
1825 if (rules->tokens == NULL) {
1829 rules->token_max = PREALLOC_TOKEN;
1831 rules->buf = malloc(PREALLOC_STRBUF);
1832 if (rules->buf == NULL) {
1833 free(rules->tokens);
1837 rules->buf_max = PREALLOC_STRBUF;
1838 /* offset 0 is always '\0' */
1839 rules->buf[0] = '\0';
1841 dbg(udev, "prealloc %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1842 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1844 rules->trie_nodes = malloc(PREALLOC_TRIE * sizeof(struct trie_node));
1845 if (rules->trie_nodes == NULL) {
1847 free(rules->tokens);
1851 rules->trie_nodes_max = PREALLOC_TRIE;
1852 /* offset 0 is the trie root, with an empty string */
1853 memset(rules->trie_nodes, 0x00, sizeof(struct trie_node));
1854 rules->trie_nodes_cur = 1;
1856 if (udev_get_rules_path(udev) == NULL) {
1857 char filename[UTIL_PATH_SIZE];
1859 /* /lib/udev -- default/package rules */
1860 add_matching_files(udev, &file_list, LIBEXECDIR "/rules.d", ".rules");
1862 /* /etc/udev -- system-specific/user/admin rules */
1863 add_matching_files(udev, &file_list, SYSCONFDIR "/udev/rules.d", ".rules");
1865 /* /run/udev -- throw-away/temporary rules */
1866 util_strscpyl(filename, sizeof(filename), udev_get_run_path(udev), "/rules.d", NULL);
1867 add_matching_files(udev, &file_list, filename, ".rules");
1869 /* custom rules files location for testing */
1870 add_matching_files(udev, &file_list, udev_get_rules_path(udev), ".rules");
1873 /* add all filenames to the string buffer */
1874 udev_list_entry_foreach(file_loop, udev_list_get_entry(&file_list)) {
1875 const char *filename = udev_list_entry_get_value(file_loop);
1876 unsigned int filename_off;
1878 filename_off = add_string(rules, filename);
1879 /* the offset in the rule is limited to unsigned short */
1880 if (filename_off < USHRT_MAX)
1881 udev_list_entry_set_num(file_loop, filename_off);
1884 /* parse all rules files */
1885 udev_list_entry_foreach(file_loop, udev_list_get_entry(&file_list)) {
1886 const char *filename = udev_list_entry_get_value(file_loop);
1887 unsigned int filename_off = udev_list_entry_get_num(file_loop);
1890 if (stat(filename, &st) != 0) {
1891 err(udev, "can not find '%s': %m\n", filename);
1894 if (S_ISREG(st.st_mode) && st.st_size <= 0) {
1895 info(udev, "ignore empty '%s'\n", filename);
1898 if (S_ISCHR(st.st_mode)) {
1899 info(udev, "ignore masked '%s'\n", filename);
1902 parse_file(rules, filename, filename_off);
1904 udev_list_cleanup(&file_list);
1906 memset(&end_token, 0x00, sizeof(struct token));
1907 end_token.type = TK_END;
1908 add_token(rules, &end_token);
1910 /* shrink allocated token and string buffer */
1911 if (rules->token_cur < rules->token_max) {
1912 struct token *tokens;
1914 tokens = realloc(rules->tokens, rules->token_cur * sizeof(struct token));
1915 if (tokens != NULL || rules->token_cur == 0) {
1916 rules->tokens = tokens;
1917 rules->token_max = rules->token_cur;
1920 if (rules->buf_cur < rules->buf_max) {
1923 buf = realloc(rules->buf, rules->buf_cur);
1924 if (buf != NULL || rules->buf_cur == 0) {
1926 rules->buf_max = rules->buf_cur;
1929 info(udev, "rules use %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n",
1930 rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max);
1931 info(udev, "temporary index used %zu bytes (%u * %zu bytes)\n",
1932 rules->trie_nodes_cur * sizeof(struct trie_node),
1933 rules->trie_nodes_cur, sizeof(struct trie_node));
1936 free(rules->trie_nodes);
1937 rules->trie_nodes = NULL;
1938 rules->trie_nodes_cur = 0;
1939 rules->trie_nodes_max = 0;
1941 /* cleanup uid/gid cache */
1944 rules->uids_cur = 0;
1945 rules->uids_max = 0;
1948 rules->gids_cur = 0;
1949 rules->gids_max = 0;
1955 void udev_rules_unref(struct udev_rules *rules)
1959 free(rules->tokens);
1961 free(rules->trie_nodes);
1967 static int match_key(struct udev_rules *rules, struct token *token, const char *val)
1969 char *key_value = &rules->buf[token->key.value_off];
1976 switch (token->key.glob) {
1978 match = (strcmp(key_value, val) == 0);
1981 match = (fnmatch(key_value, val, 0) == 0);
1988 split = &rules->buf[token->key.value_off];
1993 next = strchr(split, '|');
1995 size_t matchlen = (size_t)(next - split);
1997 match = (matchlen == len && strncmp(split, val, matchlen) == 0);
2001 match = (strcmp(split, val) == 0);
2010 char value[UTIL_PATH_SIZE];
2012 util_strscpy(value, sizeof(value), &rules->buf[token->key.value_off]);
2014 while (key_value != NULL) {
2015 pos = strchr(key_value, '|');
2020 dbg(rules->udev, "match %s '%s' <-> '%s'\n", token_str(token->type), key_value, val);
2021 match = (fnmatch(key_value, val, 0) == 0);
2029 match = (val[0] != '\0');
2035 if (match && (token->key.op == OP_MATCH)) {
2036 dbg(rules->udev, "%s is true (matching value)\n", token_str(token->type));
2039 if (!match && (token->key.op == OP_NOMATCH)) {
2040 dbg(rules->udev, "%s is true (non-matching value)\n", token_str(token->type));
2043 dbg(rules->udev, "%s is not true\n", token_str(token->type));
2047 static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur)
2050 char nbuf[UTIL_NAME_SIZE];
2052 char vbuf[UTIL_NAME_SIZE];
2055 name = &rules->buf[cur->key.attr_off];
2056 switch (cur->key.attrsubst) {
2058 udev_event_apply_format(event, name, nbuf, sizeof(nbuf));
2062 value = udev_device_get_sysattr_value(dev, name);
2067 if (util_resolve_subsys_kernel(event->udev, name, vbuf, sizeof(vbuf), 1) != 0)
2075 /* remove trailing whitespace, if not asked to match for it */
2076 len = strlen(value);
2077 if (len > 0 && isspace(value[len-1])) {
2078 const char *key_value;
2081 key_value = &rules->buf[cur->key.value_off];
2082 klen = strlen(key_value);
2083 if (klen > 0 && !isspace(key_value[klen-1])) {
2084 if (value != vbuf) {
2085 util_strscpy(vbuf, sizeof(vbuf), value);
2088 while (len > 0 && isspace(vbuf[--len]))
2090 dbg(rules->udev, "removed trailing whitespace from '%s'\n", value);
2094 return match_key(rules, cur, value);
2103 int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event, const sigset_t *sigmask)
2107 enum escape_type esc = ESCAPE_UNSET;
2110 if (rules->tokens == NULL)
2113 can_set_name = ((strcmp(udev_device_get_action(event->dev), "remove") != 0) &&
2114 (major(udev_device_get_devnum(event->dev)) > 0 ||
2115 udev_device_get_ifindex(event->dev) > 0));
2117 /* loop through token list, match, run actions or forward to next rule */
2118 cur = &rules->tokens[0];
2121 dump_token(rules, cur);
2122 switch (cur->type) {
2126 /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
2127 if (!can_set_name && rule->rule.can_set_name)
2132 if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
2136 if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
2140 if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
2143 case TK_M_DEVLINK: {
2144 size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
2145 struct udev_list_entry *list_entry;
2148 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
2149 const char *devlink;
2151 devlink = &udev_list_entry_get_name(list_entry)[devlen];
2152 if (match_key(rules, cur, devlink) == 0) {
2162 if (match_key(rules, cur, event->name) != 0)
2166 const char *key_name = &rules->buf[cur->key.attr_off];
2169 value = udev_device_get_property_value(event->dev, key_name);
2170 if (value == NULL) {
2171 dbg(event->udev, "ENV{%s} is not set, treat as empty\n", key_name);
2174 if (match_key(rules, cur, value))
2179 struct udev_list_entry *list_entry;
2182 udev_list_entry_foreach(list_entry, udev_device_get_tags_list_entry(event->dev)) {
2183 if (strcmp(&rules->buf[cur->key.value_off], udev_list_entry_get_name(list_entry)) == 0) {
2188 if (!match && (cur->key.op != OP_NOMATCH))
2192 case TK_M_SUBSYSTEM:
2193 if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
2197 if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
2200 case TK_M_WAITFOR: {
2201 char filename[UTIL_PATH_SIZE];
2204 udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename));
2205 found = (wait_for_file(event->dev, filename, 10) == 0);
2206 if (!found && (cur->key.op != OP_NOMATCH))
2211 if (match_attr(rules, event->dev, event, cur) != 0)
2215 case TK_M_SUBSYSTEMS:
2221 /* get whole sequence of parent matches */
2223 while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX)
2226 /* loop over parents */
2227 event->dev_parent = event->dev;
2231 dbg(event->udev, "parent: '%s'\n", udev_device_get_syspath(event->dev_parent));
2232 /* loop over sequence of parent match keys */
2233 for (key = cur; key < next; key++ ) {
2234 dump_token(rules, key);
2237 if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
2240 case TK_M_SUBSYSTEMS:
2241 if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
2245 if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
2249 if (match_attr(rules, event->dev_parent, event, key) != 0)
2253 bool match = udev_device_has_tag(event->dev_parent, &rules->buf[cur->key.value_off]);
2255 if (match && key->key.op == OP_NOMATCH)
2257 if (!match && key->key.op == OP_MATCH)
2264 dbg(event->udev, "parent key matched\n");
2266 dbg(event->udev, "all parent keys matched\n");
2270 event->dev_parent = udev_device_get_parent(event->dev_parent);
2271 if (event->dev_parent == NULL)
2274 /* move behind our sequence of parent match keys */
2279 char filename[UTIL_PATH_SIZE];
2280 struct stat statbuf;
2283 udev_event_apply_format(event, &rules->buf[cur->key.value_off], filename, sizeof(filename));
2284 if (util_resolve_subsys_kernel(event->udev, filename, filename, sizeof(filename), 0) != 0) {
2285 if (filename[0] != '/') {
2286 char tmp[UTIL_PATH_SIZE];
2288 util_strscpy(tmp, sizeof(tmp), filename);
2289 util_strscpyl(filename, sizeof(filename),
2290 udev_device_get_syspath(event->dev), "/", tmp, NULL);
2293 attr_subst_subdir(filename, sizeof(filename));
2295 match = (stat(filename, &statbuf) == 0);
2296 dbg(event->udev, "'%s' %s", filename, match ? "exists\n" : "does not exist\n");
2297 if (match && cur->key.mode > 0) {
2298 match = ((statbuf.st_mode & cur->key.mode) > 0);
2299 dbg(event->udev, "'%s' has mode=%#o and %s %#o\n", filename, statbuf.st_mode,
2300 match ? "matches" : "does not match", cur->key.mode);
2302 if (match && cur->key.op == OP_NOMATCH)
2304 if (!match && cur->key.op == OP_MATCH)
2308 case TK_M_EVENT_TIMEOUT:
2309 info(event->udev, "OPTIONS event_timeout=%u\n", cur->key.event_timeout);
2310 event->timeout_usec = cur->key.event_timeout * 1000 * 1000;
2312 case TK_M_PROGRAM: {
2313 char program[UTIL_PATH_SIZE];
2315 char result[UTIL_PATH_SIZE];
2317 free(event->program_result);
2318 event->program_result = NULL;
2319 udev_event_apply_format(event, &rules->buf[cur->key.value_off], program, sizeof(program));
2320 envp = udev_device_get_properties_envp(event->dev);
2321 info(event->udev, "PROGRAM '%s' %s:%u\n",
2323 &rules->buf[rule->rule.filename_off],
2324 rule->rule.filename_line);
2326 if (udev_event_spawn(event, program, envp, sigmask, result, sizeof(result)) < 0) {
2327 if (cur->key.op != OP_NOMATCH)
2332 util_remove_trailing_chars(result, '\n');
2333 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2334 count = udev_util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
2336 info(event->udev, "%i character(s) replaced\n" , count);
2338 event->program_result = strdup(result);
2339 dbg(event->udev, "storing result '%s'\n", event->program_result);
2340 if (cur->key.op == OP_NOMATCH)
2345 case TK_M_IMPORT_FILE: {
2346 char import[UTIL_PATH_SIZE];
2348 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2349 if (import_file_into_properties(event->dev, import) != 0)
2350 if (cur->key.op != OP_NOMATCH)
2354 case TK_M_IMPORT_PROG: {
2355 char import[UTIL_PATH_SIZE];
2357 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2358 info(event->udev, "IMPORT '%s' %s:%u\n",
2360 &rules->buf[rule->rule.filename_off],
2361 rule->rule.filename_line);
2363 if (import_program_into_properties(event, import, sigmask) != 0)
2364 if (cur->key.op != OP_NOMATCH)
2368 case TK_M_IMPORT_BUILTIN: {
2369 /* check if we ran already */
2370 if (event->builtin_run & (1 << cur->key.builtin_cmd)) {
2371 info(event->udev, "IMPORT builtin skip '%s' %s:%u\n",
2372 udev_builtin_name(cur->key.builtin_cmd),
2373 &rules->buf[rule->rule.filename_off],
2374 rule->rule.filename_line);
2375 /* return the result from earlier run */
2376 if (event->builtin_ret & (1 << cur->key.builtin_cmd))
2377 if (cur->key.op != OP_NOMATCH)
2382 event->builtin_run |= (1 << cur->key.builtin_cmd);
2383 info(event->udev, "IMPORT builtin '%s' %s:%u\n",
2384 udev_builtin_name(cur->key.builtin_cmd),
2385 &rules->buf[rule->rule.filename_off],
2386 rule->rule.filename_line);
2387 if (udev_builtin_run(event->dev, cur->key.builtin_cmd, false) != 0) {
2388 /* remember failure */
2389 info(rules->udev, "IMPORT builtin '%s' returned non-zero\n",
2390 udev_builtin_name(cur->key.builtin_cmd));
2391 event->builtin_ret |= (1 << cur->key.builtin_cmd);
2392 if (cur->key.op != OP_NOMATCH)
2397 case TK_M_IMPORT_DB: {
2398 const char *key = &rules->buf[cur->key.value_off];
2401 value = udev_device_get_property_value(event->dev_db, key);
2402 if (value != NULL) {
2403 struct udev_list_entry *entry;
2405 entry = udev_device_add_property(event->dev, key, value);
2406 udev_list_entry_set_num(entry, true);
2408 if (cur->key.op != OP_NOMATCH)
2413 case TK_M_IMPORT_CMDLINE: {
2415 bool imported = false;
2417 f = fopen("/proc/cmdline", "r");
2421 if (fgets(cmdline, sizeof(cmdline), f) != NULL) {
2422 const char *key = &rules->buf[cur->key.value_off];
2425 pos = strstr(cmdline, key);
2427 struct udev_list_entry *entry;
2430 if (pos[0] == '\0' || isspace(pos[0])) {
2431 /* we import simple flags as 'FLAG=1' */
2432 entry = udev_device_add_property(event->dev, key, "1");
2433 udev_list_entry_set_num(entry, true);
2435 } else if (pos[0] == '=') {
2440 while (pos[0] != '\0' && !isspace(pos[0]))
2443 entry = udev_device_add_property(event->dev, key, value);
2444 udev_list_entry_set_num(entry, true);
2451 if (!imported && cur->key.op != OP_NOMATCH)
2455 case TK_M_IMPORT_PARENT: {
2456 char import[UTIL_PATH_SIZE];
2458 udev_event_apply_format(event, &rules->buf[cur->key.value_off], import, sizeof(import));
2459 if (import_parent_into_properties(event->dev, import) != 0)
2460 if (cur->key.op != OP_NOMATCH)
2465 if (match_key(rules, cur, event->program_result) != 0)
2468 case TK_A_STRING_ESCAPE_NONE:
2471 case TK_A_STRING_ESCAPE_REPLACE:
2472 esc = ESCAPE_REPLACE;
2474 case TK_A_DB_PERSIST:
2475 udev_device_set_db_persist(event->dev);
2477 case TK_A_INOTIFY_WATCH:
2478 if (event->inotify_watch_final)
2480 if (cur->key.op == OP_ASSIGN_FINAL)
2481 event->inotify_watch_final = true;
2482 event->inotify_watch = cur->key.watch;
2484 case TK_A_DEVLINK_PRIO:
2485 udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
2488 char owner[UTIL_NAME_SIZE];
2490 if (event->owner_final)
2492 if (cur->key.op == OP_ASSIGN_FINAL)
2493 event->owner_final = true;
2494 udev_event_apply_format(event, &rules->buf[cur->key.value_off], owner, sizeof(owner));
2495 event->uid = util_lookup_user(event->udev, owner);
2496 info(event->udev, "OWNER %u %s:%u\n",
2498 &rules->buf[rule->rule.filename_off],
2499 rule->rule.filename_line);
2503 char group[UTIL_NAME_SIZE];
2505 if (event->group_final)
2507 if (cur->key.op == OP_ASSIGN_FINAL)
2508 event->group_final = true;
2509 udev_event_apply_format(event, &rules->buf[cur->key.value_off], group, sizeof(group));
2510 event->gid = util_lookup_group(event->udev, group);
2511 info(event->udev, "GROUP %u %s:%u\n",
2513 &rules->buf[rule->rule.filename_off],
2514 rule->rule.filename_line);
2518 char mode_str[UTIL_NAME_SIZE];
2522 if (event->mode_final)
2524 udev_event_apply_format(event, &rules->buf[cur->key.value_off], mode_str, sizeof(mode_str));
2525 mode = strtol(mode_str, &endptr, 8);
2526 if (endptr[0] != '\0') {
2527 err(event->udev, "ignoring invalid mode '%s'\n", mode_str);
2530 if (cur->key.op == OP_ASSIGN_FINAL)
2531 event->mode_final = true;
2532 event->mode_set = true;
2534 info(event->udev, "MODE %#o %s:%u\n",
2536 &rules->buf[rule->rule.filename_off],
2537 rule->rule.filename_line);
2541 if (event->owner_final)
2543 if (cur->key.op == OP_ASSIGN_FINAL)
2544 event->owner_final = true;
2545 event->uid = cur->key.uid;
2546 info(event->udev, "OWNER %u %s:%u\n",
2548 &rules->buf[rule->rule.filename_off],
2549 rule->rule.filename_line);
2552 if (event->group_final)
2554 if (cur->key.op == OP_ASSIGN_FINAL)
2555 event->group_final = true;
2556 event->gid = cur->key.gid;
2557 info(event->udev, "GROUP %u %s:%u\n",
2559 &rules->buf[rule->rule.filename_off],
2560 rule->rule.filename_line);
2563 if (event->mode_final)
2565 if (cur->key.op == OP_ASSIGN_FINAL)
2566 event->mode_final = true;
2567 event->mode_set = true;
2568 event->mode = cur->key.mode;
2569 info(event->udev, "MODE %#o %s:%u\n",
2571 &rules->buf[rule->rule.filename_off],
2572 rule->rule.filename_line);
2574 case TK_A_STATIC_NODE:
2575 event->static_node = true;
2578 const char *name = &rules->buf[cur->key.attr_off];
2579 char *value = &rules->buf[cur->key.value_off];
2581 if (value[0] != '\0') {
2582 char temp_value[UTIL_NAME_SIZE];
2583 struct udev_list_entry *entry;
2585 udev_event_apply_format(event, value, temp_value, sizeof(temp_value));
2586 entry = udev_device_add_property(event->dev, name, temp_value);
2587 /* store in db, skip private keys */
2589 udev_list_entry_set_num(entry, true);
2591 udev_device_add_property(event->dev, name, NULL);
2596 char tag[UTIL_PATH_SIZE];
2599 udev_event_apply_format(event, &rules->buf[cur->key.value_off], tag, sizeof(tag));
2600 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2601 udev_device_cleanup_tags_list(event->dev);
2602 for (p = tag; *p != '\0'; p++) {
2603 if ((*p >= 'a' && *p <= 'z') ||
2604 (*p >= 'A' && *p <= 'Z') ||
2605 (*p >= '0' && *p <= '9') ||
2606 *p == '-' || *p == '_')
2608 err(event->udev, "ignoring invalid tag name '%s'\n", tag);
2611 udev_device_add_tag(event->dev, tag);
2615 const char *name = &rules->buf[cur->key.value_off];
2616 char name_str[UTIL_PATH_SIZE];
2619 if (event->name_final)
2621 if (cur->key.op == OP_ASSIGN_FINAL)
2622 event->name_final = true;
2623 udev_event_apply_format(event, name, name_str, sizeof(name_str));
2624 if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
2625 count = udev_util_replace_chars(name_str, "/");
2627 info(event->udev, "%i character(s) replaced\n", count);
2630 event->name = strdup(name_str);
2631 info(event->udev, "NAME '%s' %s:%u\n",
2633 &rules->buf[rule->rule.filename_off],
2634 rule->rule.filename_line);
2637 case TK_A_DEVLINK: {
2638 char temp[UTIL_PATH_SIZE];
2639 char filename[UTIL_PATH_SIZE];
2643 if (event->devlink_final)
2645 if (major(udev_device_get_devnum(event->dev)) == 0)
2647 if (cur->key.op == OP_ASSIGN_FINAL)
2648 event->devlink_final = true;
2649 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2650 udev_device_cleanup_devlinks_list(event->dev);
2652 /* allow multiple symlinks separated by spaces */
2653 udev_event_apply_format(event, &rules->buf[cur->key.value_off], temp, sizeof(temp));
2654 if (esc == ESCAPE_UNSET)
2655 count = udev_util_replace_chars(temp, "/ ");
2656 else if (esc == ESCAPE_REPLACE)
2657 count = udev_util_replace_chars(temp, "/");
2659 info(event->udev, "%i character(s) replaced\n" , count);
2660 dbg(event->udev, "rule applied, added symlink(s) '%s'\n", temp);
2662 while (isspace(pos[0]))
2664 next = strchr(pos, ' ');
2665 while (next != NULL) {
2667 info(event->udev, "LINK '%s' %s:%u\n", pos,
2668 &rules->buf[rule->rule.filename_off], rule->rule.filename_line);
2669 util_strscpyl(filename, sizeof(filename), udev_get_dev_path(event->udev), "/", pos, NULL);
2670 udev_device_add_devlink(event->dev, filename, cur->key.devlink_unique);
2671 while (isspace(next[1]))
2674 next = strchr(pos, ' ');
2676 if (pos[0] != '\0') {
2677 info(event->udev, "LINK '%s' %s:%u\n", pos,
2678 &rules->buf[rule->rule.filename_off], rule->rule.filename_line);
2679 util_strscpyl(filename, sizeof(filename), udev_get_dev_path(event->udev), "/", pos, NULL);
2680 udev_device_add_devlink(event->dev, filename, cur->key.devlink_unique);
2685 const char *key_name = &rules->buf[cur->key.attr_off];
2686 char attr[UTIL_PATH_SIZE];
2687 char value[UTIL_NAME_SIZE];
2690 if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0)
2691 util_strscpyl(attr, sizeof(attr), udev_device_get_syspath(event->dev), "/", key_name, NULL);
2692 attr_subst_subdir(attr, sizeof(attr));
2694 udev_event_apply_format(event, &rules->buf[cur->key.value_off], value, sizeof(value));
2695 info(event->udev, "ATTR '%s' writing '%s' %s:%u\n", attr, value,
2696 &rules->buf[rule->rule.filename_off],
2697 rule->rule.filename_line);
2698 f = fopen(attr, "w");
2700 if (fprintf(f, "%s", value) <= 0)
2701 err(event->udev, "error writing ATTR{%s}: %m\n", attr);
2704 err(event->udev, "error opening ATTR{%s} for writing: %m\n", attr);
2709 struct udev_list_entry *list_entry;
2711 if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
2712 udev_list_cleanup(&event->run_list);
2713 info(event->udev, "RUN '%s' %s:%u\n",
2714 &rules->buf[cur->key.value_off],
2715 &rules->buf[rule->rule.filename_off],
2716 rule->rule.filename_line);
2717 list_entry = udev_list_entry_add(&event->run_list, &rules->buf[cur->key.value_off], NULL);
2718 if (cur->key.fail_on_error)
2719 udev_list_entry_set_num(list_entry, true);
2723 if (cur->key.rule_goto == 0)
2725 cur = &rules->tokens[cur->key.rule_goto];
2730 case TK_M_PARENTS_MIN:
2731 case TK_M_PARENTS_MAX:
2734 err(rules->udev, "wrong type %u\n", cur->type);
2741 /* fast-forward to next rule */
2742 cur = rule + rule->rule.token_count;
2743 dbg(rules->udev, "forward to rule: %u\n",
2744 (unsigned int) (cur - rules->tokens));
2748 void udev_rules_apply_static_dev_perms(struct udev_rules *rules)
2756 if (rules->tokens == NULL)
2759 cur = &rules->tokens[0];
2762 switch (cur->type) {
2767 /* skip rules without a static_node tag */
2768 if (!rule->rule.has_static_node)
2782 mode = cur->key.mode;
2784 case TK_A_STATIC_NODE: {
2785 char filename[UTIL_PATH_SIZE];
2788 /* we assure, that the permissions tokens are sorted before the static token */
2789 if (mode == 0 && uid == 0 && gid == 0)
2791 util_strscpyl(filename, sizeof(filename), udev_get_dev_path(rules->udev), "/",
2792 &rules->buf[cur->key.value_off], NULL);
2793 if (stat(filename, &stats) != 0)
2795 if (!S_ISBLK(stats.st_mode) && !S_ISCHR(stats.st_mode))
2803 /* set sticky bit, so we do not remove the node on module unload */
2805 if (mode != (stats.st_mode & 01777)) {
2806 chmod(filename, mode);
2807 info(rules->udev, "chmod '%s' %#o\n", filename, mode);
2810 if ((uid != 0 && uid != stats.st_uid) || (gid != 0 && gid != stats.st_gid)) {
2811 chown(filename, uid, gid);
2812 info(rules->udev, "chown '%s' %u %u\n", filename, uid, gid);
2815 utimensat(AT_FDCWD, filename, NULL, 0);
2825 /* fast-forward to next rule */
2826 cur = rule + rule->rule.token_count;