2 * Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
3 * Copyright (C) 2003-2008 Kay Sievers <kay.sievers@vrfy.org>
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/>.
39 struct udev_rules_iter {
40 struct udev_rules *rules;
54 enum key_operation operation;
66 struct key_pair keys[PAIRS_MAX];
88 struct key_pairs attr;
91 struct key subsystems;
93 struct key_pairs attrs;
99 enum import_type import_type;
101 mode_t test_mode_mask;
105 struct key goto_label;
106 size_t goto_rule_off;
110 struct key symlink_match;
114 enum escape_type string_escape;
116 unsigned int link_priority;
118 unsigned int partitions;
119 unsigned int last_rule:1,
128 static void udev_rules_iter_init(struct udev_rules_iter *iter, struct udev_rules *rules)
130 dbg(rules->udev, "bufsize=%zi\n", rules->bufsize);
135 static struct udev_rule *udev_rules_iter_next(struct udev_rules_iter *iter)
137 struct udev_rules *rules;
138 struct udev_rule *rule;
144 dbg(rules->udev, "current=%zi\n", iter->current);
145 if (iter->current >= rules->bufsize) {
146 dbg(rules->udev, "no more rules\n");
151 rule = (struct udev_rule *) (rules->buf + iter->current);
152 iter->current += sizeof(struct udev_rule) + rule->bufsize;
157 static struct udev_rule *udev_rules_iter_goto(struct udev_rules_iter *iter, size_t rule_off)
159 struct udev_rules *rules = iter->rules;
160 struct udev_rule *rule;
162 dbg(rules->udev, "current=%zi\n", iter->current);
163 iter->current = rule_off;
164 rule = (struct udev_rule *) (rules->buf + iter->current);
169 static size_t find_label(const struct udev_rules_iter *iter, const char *label)
171 struct udev_rule *rule;
172 struct udev_rules *rules = iter->rules;
173 size_t current = iter->current;
176 dbg(rules->udev, "current=%zi\n", current);
177 if (current >= rules->bufsize) {
178 dbg(rules->udev, "LABEL='%s' not found\n", label);
181 rule = (struct udev_rule *) (rules->buf + current);
183 if (strcmp(&rule->buf[rule->label.val_off], label) != 0) {
184 dbg(rules->udev, "moving forward, looking for label '%s'\n", label);
185 current += sizeof(struct udev_rule) + rule->bufsize;
189 dbg(rules->udev, "found label '%s'\n", label);
193 static int import_property_from_string(struct udev_device *dev, char *line)
195 struct udev *udev = udev_device_get_udev(dev);
202 while (isspace(key[0]))
205 /* comment or empty line */
206 if (key[0] == '#' || key[0] == '\0')
209 /* split key/value */
210 val = strchr(key, '=');
217 while (isspace(val[0]))
224 while (isspace(key[len-1]))
228 /* terminate value */
232 while (isspace(val[len-1]))
240 if (val[0] == '"' || val[0] == '\'') {
241 if (val[len-1] != val[0]) {
242 info(udev, "inconsistent quoting: '%s', skip\n", line);
249 info(udev, "adding '%s'='%s'\n", key, val);
251 /* handle device, renamed by external tool, returning new path */
252 if (strcmp(key, "DEVPATH") == 0) {
253 char syspath[UTIL_PATH_SIZE];
255 info(udev, "updating devpath from '%s' to '%s'\n",
256 udev_device_get_devpath(dev), val);
257 util_strlcpy(syspath, udev_get_sys_path(udev), sizeof(syspath));
258 util_strlcat(syspath, val, sizeof(syspath));
259 udev_device_set_syspath(dev, syspath);
261 struct udev_list_entry *entry;
263 entry = udev_device_add_property(dev, key, val);
265 udev_list_entry_set_flag(entry, 1);
270 static int import_file_into_env(struct udev_device *dev, const char *filename)
273 char line[UTIL_LINE_SIZE];
275 f = fopen(filename, "r");
278 while (fgets(line, sizeof(line), f) != NULL)
279 import_property_from_string(dev, line);
284 static int import_program_into_env(struct udev_device *dev, const char *program)
286 struct udev *udev = udev_device_get_udev(dev);
292 envp = udev_device_get_properties_envp(dev);
293 if (util_run_program(udev, program, envp, result, sizeof(result), &reslen) != 0)
297 while (line != NULL) {
300 pos = strchr(line, '\n');
305 import_property_from_string(dev, line);
311 static int import_parent_into_env(struct udev_device *dev, const char *filter)
313 struct udev *udev = udev_device_get_udev(dev);
314 struct udev_device *dev_parent;
315 struct udev_list_entry *list_entry;
317 dev_parent = udev_device_get_parent(dev);
318 if (dev_parent == NULL)
321 dbg(udev, "found parent '%s', get the node name\n", udev_device_get_syspath(dev_parent));
322 udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
323 const char *key = udev_list_entry_get_name(list_entry);
324 const char *val = udev_list_entry_get_value(list_entry);
326 if (fnmatch(filter, key, 0) == 0) {
327 struct udev_list_entry *entry;
329 dbg(udev, "import key '%s=%s'\n", key, val);
330 entry = udev_device_add_property(dev, key, val);
332 udev_list_entry_set_flag(entry, 1);
338 #define WAIT_LOOP_PER_SECOND 50
339 static int wait_for_file(struct udev_event *event, const char *file, int timeout)
341 char filepath[UTIL_PATH_SIZE];
342 char devicepath[UTIL_PATH_SIZE] = "";
344 int loop = timeout * WAIT_LOOP_PER_SECOND;
346 /* a relative path is a device attribute */
347 if (file[0] != '/') {
348 util_strlcpy(devicepath, udev_get_sys_path(event->udev), sizeof(devicepath));
349 util_strlcat(devicepath, udev_device_get_devpath(event->dev), sizeof(devicepath));
351 util_strlcpy(filepath, devicepath, sizeof(filepath));
352 util_strlcat(filepath, "/", sizeof(filepath));
353 util_strlcat(filepath, file, sizeof(filepath));
357 dbg(event->udev, "will wait %i sec for '%s'\n", timeout, file);
360 if (stat(file, &stats) == 0) {
361 info(event->udev, "file '%s' appeared after %i loops\n", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
364 /* make sure, the device did not disappear in the meantime */
365 if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
366 info(event->udev, "device disappeared while waiting for '%s'\n", file);
369 info(event->udev, "wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND);
370 usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND);
372 info(event->udev, "waiting for '%s' failed\n", file);
376 static int attr_subst_subdir(char *attr, size_t len)
381 pos = strstr(attr, "/*/");
383 char str[UTIL_PATH_SIZE];
387 util_strlcpy(str, &pos[2], sizeof(str));
392 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
395 if (dent->d_name[0] == '.')
397 util_strlcat(attr, dent->d_name, len);
398 util_strlcat(attr, str, len);
399 if (stat(attr, &stats) == 0) {
408 util_strlcat(attr, str, len);
414 static char *key_val(struct udev_rule *rule, struct key *key)
416 return rule->buf + key->val_off;
419 static char *key_pair_name(struct udev_rule *rule, struct key_pair *pair)
421 return rule->buf + pair->key_name_off;
424 static int match_key(struct udev *udev, const char *key_name, struct udev_rule *rule, struct key *key, const char *val)
426 char value[UTIL_PATH_SIZE];
431 if (key->operation != KEY_OP_MATCH &&
432 key->operation != KEY_OP_NOMATCH)
438 /* look for a matching string, parts are separated by '|' */
439 util_strlcpy(value, rule->buf + key->val_off, sizeof(value));
441 dbg(udev, "key %s value='%s'\n", key_name, key_value);
442 while (key_value != NULL) {
443 pos = strchr(key_value, '|');
449 dbg(udev, "match %s '%s' <-> '%s'\n", key_name, key_value, val);
450 match = (fnmatch(key_value, val, 0) == 0);
457 if (match && (key->operation == KEY_OP_MATCH)) {
458 dbg(udev, "%s is true (matching value)\n", key_name);
461 if (!match && (key->operation == KEY_OP_NOMATCH)) {
462 dbg(udev, "%s is true (non-matching value)\n", key_name);
468 /* match a single rule against a given device and possibly its parent devices */
469 static int match_rule(struct udev_event *event, struct udev_rule *rule)
471 struct udev_device *dev = event->dev;
474 if (match_key(event->udev, "ACTION", rule, &rule->action, udev_device_get_action(dev)))
477 if (match_key(event->udev, "KERNEL", rule, &rule->kernel, udev_device_get_sysname(dev)))
480 if (match_key(event->udev, "SUBSYSTEM", rule, &rule->subsystem, udev_device_get_subsystem(dev)))
483 if (match_key(event->udev, "DEVPATH", rule, &rule->devpath, udev_device_get_devpath(dev)))
486 if (match_key(event->udev, "DRIVER", rule, &rule->driver, udev_device_get_driver(dev)))
489 /* match NAME against a value assigned by an earlier rule */
490 if (match_key(event->udev, "NAME", rule, &rule->name, event->name))
493 /* match against current list of symlinks */
494 if (rule->symlink_match.operation == KEY_OP_MATCH ||
495 rule->symlink_match.operation == KEY_OP_NOMATCH) {
496 size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
497 struct udev_list_entry *list_entry;
500 udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(dev)) {
503 devlink = &udev_list_entry_get_name(list_entry)[devlen];
504 if (match_key(event->udev, "SYMLINK", rule, &rule->symlink_match, devlink) == 0) {
513 for (i = 0; i < rule->env.count; i++) {
514 struct key_pair *pair = &rule->env.keys[i];
516 /* we only check for matches, assignments will be handled later */
517 if (pair->key.operation == KEY_OP_MATCH ||
518 pair->key.operation == KEY_OP_NOMATCH) {
519 struct udev_list_entry *list_entry;
520 const char *key_name = key_pair_name(rule, pair);
523 list_entry = udev_device_get_properties_list_entry(event->dev);
524 list_entry = udev_list_entry_get_by_name(list_entry, key_name);
525 value = udev_list_entry_get_value(list_entry);
527 dbg(event->udev, "ENV{%s} is not set, treat as empty\n", key_name);
530 if (match_key(event->udev, "ENV", rule, &pair->key, value))
535 if (rule->test.operation == KEY_OP_MATCH ||
536 rule->test.operation == KEY_OP_NOMATCH) {
537 char filename[UTIL_PATH_SIZE];
541 util_strlcpy(filename, key_val(rule, &rule->test), sizeof(filename));
542 udev_event_apply_format(event, filename, sizeof(filename));
543 if (udev_event_apply_subsys_kernel(event, NULL, filename, sizeof(filename), 0) != 0)
544 if (filename[0] != '/') {
545 char tmp[UTIL_PATH_SIZE];
547 util_strlcpy(tmp, udev_device_get_syspath(dev), sizeof(tmp));
548 util_strlcat(tmp, "/", sizeof(tmp));
549 util_strlcat(tmp, filename, sizeof(tmp));
550 util_strlcpy(filename, tmp, sizeof(filename));
553 attr_subst_subdir(filename, sizeof(filename));
555 match = (stat(filename, &statbuf) == 0);
556 info(event->udev, "'%s' %s", filename, match ? "exists\n" : "does not exist\n");
557 if (match && rule->test_mode_mask > 0) {
558 match = ((statbuf.st_mode & rule->test_mode_mask) > 0);
559 info(event->udev, "'%s' has mode=%#o and %s %#o\n", filename, statbuf.st_mode,
560 match ? "matches" : "does not match",
561 rule->test_mode_mask);
563 if (match && rule->test.operation == KEY_OP_NOMATCH)
565 if (!match && rule->test.operation == KEY_OP_MATCH)
567 dbg(event->udev, "TEST key is true\n");
570 if (rule->wait_for.operation != KEY_OP_UNSET) {
571 char filename[UTIL_PATH_SIZE];
574 util_strlcpy(filename, key_val(rule, &rule->wait_for), sizeof(filename));
575 udev_event_apply_format(event, filename, sizeof(filename));
576 found = (wait_for_file(event, filename, 10) == 0);
577 if (!found && (rule->wait_for.operation != KEY_OP_NOMATCH))
581 /* check for matching sysfs attribute pairs */
582 for (i = 0; i < rule->attr.count; i++) {
583 struct key_pair *pair = &rule->attr.keys[i];
585 if (pair->key.operation == KEY_OP_MATCH ||
586 pair->key.operation == KEY_OP_NOMATCH) {
587 char attr[UTIL_PATH_SIZE];
588 const char *key_name = key_pair_name(rule, pair);
589 const char *key_value = key_val(rule, &pair->key);
590 char value[UTIL_NAME_SIZE] = "";
593 util_strlcpy(attr, key_name, sizeof(attr));
594 udev_event_apply_subsys_kernel(event, attr, value, sizeof(value), 1);
596 if (value[0]=='\0') {
599 val = udev_device_get_attr_value(dev, key_name);
601 util_strlcpy(value, val, sizeof(value));
607 /* strip trailing whitespace of value, if not asked to match for it */
608 len = strlen(key_value);
609 if (len > 0 && !isspace(key_value[len-1])) {
611 while (len > 0 && isspace(value[--len]))
613 dbg(event->udev, "removed trailing whitespace from '%s'\n", value);
616 if (match_key(event->udev, "ATTR", rule, &pair->key, value))
621 /* walk up the chain of parent devices and find a match */
622 event->dev_parent = dev;
624 /* check for matching kernel device name */
625 if (match_key(event->udev, "KERNELS", rule,
626 &rule->kernels, udev_device_get_sysname(event->dev_parent)))
629 /* check for matching subsystem value */
630 if (match_key(event->udev, "SUBSYSTEMS", rule,
631 &rule->subsystems, udev_device_get_subsystem(event->dev_parent)))
634 /* check for matching driver */
635 if (match_key(event->udev, "DRIVERS", rule,
636 &rule->drivers, udev_device_get_driver(event->dev_parent)))
639 /* check for matching sysfs attribute pairs */
640 for (i = 0; i < rule->attrs.count; i++) {
641 struct key_pair *pair = &rule->attrs.keys[i];
643 if (pair->key.operation == KEY_OP_MATCH ||
644 pair->key.operation == KEY_OP_NOMATCH) {
645 const char *key_name = key_pair_name(rule, pair);
646 const char *key_value = key_val(rule, &pair->key);
648 char value[UTIL_NAME_SIZE];
651 val = udev_device_get_attr_value(event->dev_parent, key_name);
653 val = udev_device_get_attr_value(dev, key_name);
656 util_strlcpy(value, val, sizeof(value));
658 /* strip trailing whitespace of value, if not asked to match for it */
659 len = strlen(key_value);
660 if (len > 0 && !isspace(key_value[len-1])) {
662 while (len > 0 && isspace(value[--len]))
664 dbg(event->udev, "removed trailing whitespace from '%s'\n", value);
667 if (match_key(event->udev, "ATTRS", rule, &pair->key, value))
672 /* found matching device */
675 /* move to parent device */
676 dbg(event->udev, "try parent sysfs device\n");
677 event->dev_parent = udev_device_get_parent(event->dev_parent);
678 if (event->dev_parent == NULL)
680 dbg(event->udev, "looking at dev_parent->devpath='%s'\n",
681 udev_device_get_syspath(event->dev_parent));
684 /* execute external program */
685 if (rule->program.operation != KEY_OP_UNSET) {
686 char program[UTIL_PATH_SIZE];
688 char result[UTIL_PATH_SIZE];
690 util_strlcpy(program, key_val(rule, &rule->program), sizeof(program));
691 udev_event_apply_format(event, program, sizeof(program));
692 envp = udev_device_get_properties_envp(dev);
693 if (util_run_program(event->udev, program, envp, result, sizeof(result), NULL) != 0) {
694 dbg(event->udev, "PROGRAM is false\n");
695 event->program_result[0] = '\0';
696 if (rule->program.operation != KEY_OP_NOMATCH)
701 dbg(event->udev, "PROGRAM matches\n");
702 util_remove_trailing_chars(result, '\n');
703 if (rule->string_escape == ESCAPE_UNSET ||
704 rule->string_escape == ESCAPE_REPLACE) {
705 count = util_replace_chars(result, ALLOWED_CHARS_INPUT);
707 info(event->udev, "%i character(s) replaced\n" , count);
709 dbg(event->udev, "result is '%s'\n", result);
710 util_strlcpy(event->program_result, result, sizeof(event->program_result));
711 dbg(event->udev, "PROGRAM returned successful\n");
712 if (rule->program.operation == KEY_OP_NOMATCH)
715 dbg(event->udev, "PROGRAM key is true\n");
718 /* check for matching result of external program */
719 if (match_key(event->udev, "RESULT", rule, &rule->result, event->program_result))
722 /* import variables returned from program or or file into properties */
723 if (rule->import.operation != KEY_OP_UNSET) {
724 char import[UTIL_PATH_SIZE];
727 util_strlcpy(import, key_val(rule, &rule->import), sizeof(import));
728 udev_event_apply_format(event, import, sizeof(import));
729 dbg(event->udev, "check for IMPORT import='%s'\n", import);
730 if (rule->import_type == IMPORT_PROGRAM) {
731 rc = import_program_into_env(event->dev, import);
732 } else if (rule->import_type == IMPORT_FILE) {
733 dbg(event->udev, "import file import='%s'\n", import);
734 rc = import_file_into_env(event->dev, import);
735 } else if (rule->import_type == IMPORT_PARENT) {
736 dbg(event->udev, "import parent import='%s'\n", import);
737 rc = import_parent_into_env(event->dev, import);
740 dbg(event->udev, "IMPORT failed\n");
741 if (rule->import.operation != KEY_OP_NOMATCH)
744 dbg(event->udev, "IMPORT '%s' imported\n", key_val(rule, &rule->import));
745 dbg(event->udev, "IMPORT key is true\n");
748 /* rule matches, if we have ENV assignments export it */
749 for (i = 0; i < rule->env.count; i++) {
750 struct key_pair *pair = &rule->env.keys[i];
752 if (pair->key.operation == KEY_OP_ASSIGN) {
753 char temp_value[UTIL_NAME_SIZE];
754 const char *key_name = key_pair_name(rule, pair);
755 const char *value = key_val(rule, &pair->key);
757 /* make sure we don't write to the same string we possibly read from */
758 util_strlcpy(temp_value, value, sizeof(temp_value));
759 udev_event_apply_format(event, temp_value, sizeof(temp_value));
761 if (temp_value[0] != '\0') {
762 struct udev_list_entry *entry;
764 info(event->udev, "set ENV '%s=%s'\n", key_name, temp_value);
765 entry = udev_device_add_property(dev, key_name, temp_value);
767 udev_list_entry_set_flag(entry, 1);
772 /* if we have ATTR assignments, write value to sysfs file */
773 for (i = 0; i < rule->attr.count; i++) {
774 struct key_pair *pair = &rule->attr.keys[i];
776 if (pair->key.operation == KEY_OP_ASSIGN) {
777 const char *key_name = key_pair_name(rule, pair);
778 char attr[UTIL_PATH_SIZE];
779 char value[UTIL_NAME_SIZE];
782 util_strlcpy(attr, key_name, sizeof(attr));
783 if (udev_event_apply_subsys_kernel(event, key_name, attr, sizeof(attr), 0) != 0) {
784 util_strlcpy(attr, udev_device_get_syspath(dev), sizeof(attr));
785 util_strlcat(attr, "/", sizeof(attr));
786 util_strlcat(attr, key_name, sizeof(attr));
789 attr_subst_subdir(attr, sizeof(attr));
791 util_strlcpy(value, key_val(rule, &pair->key), sizeof(value));
792 udev_event_apply_format(event, value, sizeof(value));
793 info(event->udev, "writing '%s' to sysfs file '%s'\n", value, attr);
794 f = fopen(attr, "w");
797 if (fprintf(f, "%s", value) <= 0)
798 err(event->udev, "error writing ATTR{%s}: %m\n", attr);
801 err(event->udev, "error opening ATTR{%s} for writing: %m\n", attr);
810 int udev_rules_get_name(struct udev_rules *rules, struct udev_event *event)
812 struct udev_device *dev = event->dev;
813 struct udev_rules_iter iter;
814 struct udev_rule *rule;
817 dbg(event->udev, "device: '%s'\n", udev_device_get_syspath(dev));
819 /* look for a matching rule to apply */
820 udev_rules_iter_init(&iter, rules);
822 rule = udev_rules_iter_next(&iter);
827 (rule->name.operation == KEY_OP_ASSIGN ||
828 rule->name.operation == KEY_OP_ASSIGN_FINAL ||
829 rule->name.operation == KEY_OP_ADD)) {
830 dbg(event->udev, "node name already set, rule ignored\n");
834 dbg(event->udev, "process rule\n");
835 if (match_rule(event, rule) == 0) {
837 if (rule->ignore_device) {
838 info(event->udev, "rule applied, '%s' is ignored\n", udev_device_get_sysname(dev));
839 event->ignore_device = 1;
842 if (rule->ignore_remove) {
843 udev_device_set_ignore_remove(dev, 1);
844 dbg(event->udev, "remove event should be ignored\n");
846 if (rule->link_priority != 0) {
847 udev_device_set_devlink_priority(dev, rule->link_priority);
848 info(event->udev, "devlink_priority=%i\n", rule->link_priority);
850 if (rule->event_timeout >= 0) {
851 udev_device_set_event_timeout(dev, rule->event_timeout);
852 info(event->udev, "event_timeout=%i\n", rule->event_timeout);
854 /* apply all_partitions option only at a disk device */
855 if (rule->partitions > 0 &&
856 strcmp(udev_device_get_subsystem(dev), "block") == 0 &&
857 udev_device_get_sysnum(dev) == NULL) {
858 udev_device_set_num_fake_partitions(dev, rule->partitions);
859 dbg(event->udev, "creation of partition nodes requested\n");
862 /* apply permissions */
863 if (!event->mode_final && rule->mode.operation != KEY_OP_UNSET) {
864 if (rule->mode.operation == KEY_OP_ASSIGN_FINAL)
865 event->mode_final = 1;
867 util_strlcpy(buf, key_val(rule, &rule->mode), sizeof(buf));
868 udev_event_apply_format(event, buf, sizeof(buf));
869 event->mode = strtol(buf, NULL, 8);
870 dbg(event->udev, "applied mode=%#o to '%s'\n",
871 event->mode, udev_device_get_sysname(dev));
873 if (!event->owner_final && rule->owner.operation != KEY_OP_UNSET) {
874 if (rule->owner.operation == KEY_OP_ASSIGN_FINAL)
875 event->owner_final = 1;
876 util_strlcpy(event->owner, key_val(rule, &rule->owner), sizeof(event->owner));
877 udev_event_apply_format(event, event->owner, sizeof(event->owner));
878 dbg(event->udev, "applied owner='%s' to '%s'\n",
879 event->owner, udev_device_get_sysname(dev));
881 if (!event->group_final && rule->group.operation != KEY_OP_UNSET) {
882 if (rule->group.operation == KEY_OP_ASSIGN_FINAL)
883 event->group_final = 1;
884 util_strlcpy(event->group, key_val(rule, &rule->group), sizeof(event->group));
885 udev_event_apply_format(event, event->group, sizeof(event->group));
886 dbg(event->udev, "applied group='%s' to '%s'\n",
887 event->group, udev_device_get_sysname(dev));
890 /* collect symlinks */
891 if (!event->devlink_final &&
892 (rule->symlink.operation == KEY_OP_ASSIGN ||
893 rule->symlink.operation == KEY_OP_ASSIGN_FINAL ||
894 rule->symlink.operation == KEY_OP_ADD)) {
895 char temp[UTIL_PATH_SIZE];
896 char filename[UTIL_PATH_SIZE];
900 if (rule->symlink.operation == KEY_OP_ASSIGN_FINAL)
901 event->devlink_final = 1;
902 if (rule->symlink.operation == KEY_OP_ASSIGN ||
903 rule->symlink.operation == KEY_OP_ASSIGN_FINAL) {
904 info(event->udev, "reset symlink list\n");
905 udev_device_cleanup_devlinks_list(dev);
907 /* allow multiple symlinks separated by spaces */
908 util_strlcpy(temp, key_val(rule, &rule->symlink), sizeof(temp));
909 udev_event_apply_format(event, temp, sizeof(temp));
910 if (rule->string_escape == ESCAPE_UNSET)
911 count = util_replace_chars(temp, ALLOWED_CHARS_FILE " ");
912 else if (rule->string_escape == ESCAPE_REPLACE)
913 count = util_replace_chars(temp, ALLOWED_CHARS_FILE);
915 info(event->udev, "%i character(s) replaced\n" , count);
916 dbg(event->udev, "rule applied, added symlink(s) '%s'\n", temp);
918 while (isspace(pos[0]))
920 next = strchr(pos, ' ');
923 info(event->udev, "add symlink '%s'\n", pos);
924 util_strlcpy(filename, udev_get_dev_path(event->udev), sizeof(filename));
925 util_strlcat(filename, "/", sizeof(filename));
926 util_strlcat(filename, pos, sizeof(filename));
927 udev_device_add_devlink(dev, filename);
928 while (isspace(next[1]))
931 next = strchr(pos, ' ');
933 if (pos[0] != '\0') {
934 info(event->udev, "add symlink '%s'\n", pos);
935 util_strlcpy(filename, udev_get_dev_path(event->udev), sizeof(filename));
936 util_strlcat(filename, "/", sizeof(filename));
937 util_strlcat(filename, pos, sizeof(filename));
938 udev_device_add_devlink(dev, filename);
942 /* set name, later rules with name set will be ignored */
943 if (rule->name.operation == KEY_OP_ASSIGN ||
944 rule->name.operation == KEY_OP_ASSIGN_FINAL ||
945 rule->name.operation == KEY_OP_ADD) {
949 util_strlcpy(event->name, key_val(rule, &rule->name), sizeof(event->name));
950 udev_event_apply_format(event, event->name, sizeof(event->name));
951 if (rule->string_escape == ESCAPE_UNSET ||
952 rule->string_escape == ESCAPE_REPLACE) {
953 count = util_replace_chars(event->name, ALLOWED_CHARS_FILE);
955 info(event->udev, "%i character(s) replaced\n", count);
958 info(event->udev, "rule applied, '%s' becomes '%s'\n",
959 udev_device_get_sysname(dev), event->name);
960 if (strcmp(udev_device_get_subsystem(dev), "net") != 0)
961 dbg(event->udev, "'%s' owner='%s', group='%s', mode=%#o partitions=%i\n",
962 event->name, event->owner, event->group, event->mode,
963 udev_device_get_num_fake_partitions(dev));
966 if (!event->run_final && rule->run.operation != KEY_OP_UNSET) {
967 struct udev_list_entry *list_entry;
969 if (rule->run.operation == KEY_OP_ASSIGN_FINAL)
970 event->run_final = 1;
971 if (rule->run.operation == KEY_OP_ASSIGN || rule->run.operation == KEY_OP_ASSIGN_FINAL) {
972 info(event->udev, "reset run list\n");
973 udev_list_cleanup_entries(event->udev, &event->run_list);
975 dbg(event->udev, "add run '%s'\n", key_val(rule, &rule->run));
976 list_entry = udev_list_entry_add(event->udev, &event->run_list,
977 key_val(rule, &rule->run), NULL, 1, 0);
978 if (rule->run_ignore_error && list_entry != NULL)
979 udev_list_entry_set_flag(list_entry, 1);
982 if (rule->last_rule) {
983 dbg(event->udev, "last rule to be applied\n");
987 if (rule->goto_label.operation != KEY_OP_UNSET) {
988 dbg(event->udev, "moving forward to label '%s'\n", key_val(rule, &rule->goto_label));
989 udev_rules_iter_goto(&iter, rule->goto_rule_off);
995 info(event->udev, "no node name set, will use kernel name '%s'\n",
996 udev_device_get_sysname(dev));
997 util_strlcpy(event->name, udev_device_get_sysname(dev), sizeof(event->name));
1000 if (event->tmp_node[0] != '\0') {
1001 dbg(event->udev, "removing temporary device node\n");
1002 util_unlink_secure(event->udev, event->tmp_node);
1003 event->tmp_node[0] = '\0';
1008 int udev_rules_get_run(struct udev_rules *rules, struct udev_event *event)
1010 struct udev_device *dev = event->dev;
1011 struct udev_rules_iter iter;
1012 struct udev_rule *rule;
1014 dbg(event->udev, "sysname: '%s'\n", udev_device_get_sysname(dev));
1016 /* look for a matching rule to apply */
1017 udev_rules_iter_init(&iter, rules);
1019 rule = udev_rules_iter_next(&iter);
1023 dbg(event->udev, "process rule\n");
1024 if (rule->name.operation == KEY_OP_ASSIGN ||
1025 rule->name.operation == KEY_OP_ASSIGN_FINAL ||
1026 rule->name.operation == KEY_OP_ADD ||
1027 rule->symlink.operation == KEY_OP_ASSIGN ||
1028 rule->symlink.operation == KEY_OP_ASSIGN_FINAL ||
1029 rule->symlink.operation == KEY_OP_ADD ||
1030 rule->mode.operation != KEY_OP_UNSET ||
1031 rule->owner.operation != KEY_OP_UNSET || rule->group.operation != KEY_OP_UNSET) {
1032 dbg(event->udev, "skip rule that names a device\n");
1036 if (match_rule(event, rule) == 0) {
1037 if (rule->ignore_device) {
1038 info(event->udev, "rule applied, '%s' is ignored\n", udev_device_get_sysname(dev));
1039 event->ignore_device = 1;
1042 if (rule->ignore_remove) {
1043 udev_device_set_ignore_remove(dev, 1);
1044 dbg(event->udev, "remove event should be ignored\n");
1047 if (!event->run_final && rule->run.operation != KEY_OP_UNSET) {
1048 struct udev_list_entry *list_entry;
1050 if (rule->run.operation == KEY_OP_ASSIGN ||
1051 rule->run.operation == KEY_OP_ASSIGN_FINAL) {
1052 info(event->udev, "reset run list\n");
1053 udev_list_cleanup_entries(event->udev, &event->run_list);
1055 dbg(event->udev, "add run '%s'\n", key_val(rule, &rule->run));
1056 list_entry = udev_list_entry_add(event->udev, &event->run_list,
1057 key_val(rule, &rule->run), NULL, 1, 0);
1058 if (rule->run_ignore_error && list_entry != NULL)
1059 udev_list_entry_set_flag(list_entry, 1);
1060 if (rule->run.operation == KEY_OP_ASSIGN_FINAL)
1064 if (rule->last_rule) {
1065 dbg(event->udev, "last rule to be applied\n");
1069 if (rule->goto_label.operation != KEY_OP_UNSET) {
1070 dbg(event->udev, "moving forward to label '%s'\n", key_val(rule, &rule->goto_label));
1071 udev_rules_iter_goto(&iter, rule->goto_rule_off);
1079 static int get_key(struct udev_rules *rules, char **line, char **key, enum key_operation *operation, char **value)
1085 if (linepos == NULL && linepos[0] == '\0')
1088 /* skip whitespace */
1089 while (isspace(linepos[0]) || linepos[0] == ',')
1093 if (linepos[0] == '\0')
1099 if (linepos[0] == '\0')
1101 if (isspace(linepos[0]))
1103 if (linepos[0] == '=')
1105 if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
1106 if (linepos[1] == '=')
1110 /* remember end of key */
1113 /* skip whitespace after key */
1114 while (isspace(linepos[0]))
1116 if (linepos[0] == '\0')
1119 /* get operation type */
1120 if (linepos[0] == '=' && linepos[1] == '=') {
1121 *operation = KEY_OP_MATCH;
1123 dbg(rules->udev, "match:\n");
1124 } else if (linepos[0] == '!' && linepos[1] == '=') {
1125 *operation = KEY_OP_NOMATCH;
1127 dbg(rules->udev, "nomatch:\n");
1128 } else if (linepos[0] == '+' && linepos[1] == '=') {
1129 *operation = KEY_OP_ADD;
1131 dbg(rules->udev, "add:\n");
1132 } else if (linepos[0] == '=') {
1133 *operation = KEY_OP_ASSIGN;
1135 dbg(rules->udev, "assign:\n");
1136 } else if (linepos[0] == ':' && linepos[1] == '=') {
1137 *operation = KEY_OP_ASSIGN_FINAL;
1139 dbg(rules->udev, "assign_final:\n");
1146 /* skip whitespace after operator */
1147 while (isspace(linepos[0]))
1149 if (linepos[0] == '\0')
1153 if (linepos[0] == '"')
1159 temp = strchr(linepos, '"');
1164 dbg(rules->udev, "'%s'-'%s'\n", *key, *value);
1166 /* move line to next key */
1171 /* extract possible KEY{attr} */
1172 static char *get_key_attribute(struct udev_rules *rules, char *str)
1177 attr = strchr(str, '{');
1180 pos = strchr(attr, '}');
1182 err(rules->udev, "missing closing brace for format\n");
1186 dbg(rules->udev, "attribute='%s'\n", attr);
1193 static int add_rule_key(struct udev_rule *rule, struct key *key,
1194 enum key_operation operation, const char *value)
1196 size_t val_len = strnlen(value, UTIL_PATH_SIZE);
1198 key->operation = operation;
1200 key->val_off = rule->bufsize;
1201 util_strlcpy(rule->buf + rule->bufsize, value, val_len+1);
1202 rule->bufsize += val_len+1;
1207 static int add_rule_key_pair(struct udev_rules *rules, struct udev_rule *rule, struct key_pairs *pairs,
1208 enum key_operation operation, const char *key, const char *value)
1210 size_t key_len = strnlen(key, UTIL_PATH_SIZE);
1212 if (pairs->count >= PAIRS_MAX) {
1213 err(rules->udev, "skip, too many keys of the same type in a single rule\n");
1217 add_rule_key(rule, &pairs->keys[pairs->count].key, operation, value);
1219 /* add the key-name of the pair */
1220 pairs->keys[pairs->count].key_name_off = rule->bufsize;
1221 util_strlcpy(rule->buf + rule->bufsize, key, key_len+1);
1222 rule->bufsize += key_len+1;
1229 static int add_to_rules(struct udev_rules *rules, char *line, const char *filename, unsigned int lineno)
1231 char buf[sizeof(struct udev_rule) + UTIL_LINE_SIZE];
1232 struct udev_rule *rule;
1240 memset(buf, 0x00, sizeof(buf));
1241 rule = (struct udev_rule *) buf;
1242 rule->event_timeout = -1;
1246 /* get all the keys */
1250 enum key_operation operation = KEY_OP_UNSET;
1252 if (get_key(rules, &linepos, &key, &operation, &value) != 0)
1255 if (strcasecmp(key, "ACTION") == 0) {
1256 if (operation != KEY_OP_MATCH &&
1257 operation != KEY_OP_NOMATCH) {
1258 err(rules->udev, "invalid ACTION operation\n");
1261 add_rule_key(rule, &rule->action, operation, value);
1266 if (strcasecmp(key, "DEVPATH") == 0) {
1267 if (operation != KEY_OP_MATCH &&
1268 operation != KEY_OP_NOMATCH) {
1269 err(rules->udev, "invalid DEVPATH operation\n");
1272 add_rule_key(rule, &rule->devpath, operation, value);
1277 if (strcasecmp(key, "KERNEL") == 0) {
1278 if (operation != KEY_OP_MATCH &&
1279 operation != KEY_OP_NOMATCH) {
1280 err(rules->udev, "invalid KERNEL operation\n");
1283 add_rule_key(rule, &rule->kernel, operation, value);
1288 if (strcasecmp(key, "SUBSYSTEM") == 0) {
1289 if (operation != KEY_OP_MATCH &&
1290 operation != KEY_OP_NOMATCH) {
1291 err(rules->udev, "invalid SUBSYSTEM operation\n");
1294 /* bus, class, subsystem events should all be the same */
1295 if (strcmp(value, "subsystem") == 0 ||
1296 strcmp(value, "bus") == 0 ||
1297 strcmp(value, "class") == 0) {
1298 if (strcmp(value, "bus") == 0 || strcmp(value, "class") == 0)
1299 err(rules->udev, "'%s' must be specified as 'subsystem' \n"
1300 "please fix it in %s:%u", value, filename, lineno);
1301 add_rule_key(rule, &rule->subsystem, operation, "subsystem|class|bus");
1303 add_rule_key(rule, &rule->subsystem, operation, value);
1308 if (strcasecmp(key, "DRIVER") == 0) {
1309 if (operation != KEY_OP_MATCH &&
1310 operation != KEY_OP_NOMATCH) {
1311 err(rules->udev, "invalid DRIVER operation\n");
1314 add_rule_key(rule, &rule->driver, operation, value);
1319 if (strncasecmp(key, "ATTR{", sizeof("ATTR{")-1) == 0) {
1320 attr = get_key_attribute(rules, key + sizeof("ATTR")-1);
1322 err(rules->udev, "error parsing ATTR attribute\n");
1325 if (add_rule_key_pair(rules, rule, &rule->attr, operation, attr, value) != 0)
1331 if (strcasecmp(key, "KERNELS") == 0 ||
1332 strcasecmp(key, "ID") == 0) {
1333 if (operation != KEY_OP_MATCH &&
1334 operation != KEY_OP_NOMATCH) {
1335 err(rules->udev, "invalid KERNELS operation\n");
1338 add_rule_key(rule, &rule->kernels, operation, value);
1343 if (strcasecmp(key, "SUBSYSTEMS") == 0 ||
1344 strcasecmp(key, "BUS") == 0) {
1345 if (operation != KEY_OP_MATCH &&
1346 operation != KEY_OP_NOMATCH) {
1347 err(rules->udev, "invalid SUBSYSTEMS operation\n");
1350 add_rule_key(rule, &rule->subsystems, operation, value);
1355 if (strcasecmp(key, "DRIVERS") == 0) {
1356 if (operation != KEY_OP_MATCH &&
1357 operation != KEY_OP_NOMATCH) {
1358 err(rules->udev, "invalid DRIVERS operation\n");
1361 add_rule_key(rule, &rule->drivers, operation, value);
1366 if (strncasecmp(key, "ATTRS{", sizeof("ATTRS{")-1) == 0 ||
1367 strncasecmp(key, "SYSFS{", sizeof("SYSFS{")-1) == 0) {
1368 if (operation != KEY_OP_MATCH &&
1369 operation != KEY_OP_NOMATCH) {
1370 err(rules->udev, "invalid ATTRS operation\n");
1373 attr = get_key_attribute(rules, key + sizeof("ATTRS")-1);
1375 err(rules->udev, "error parsing ATTRS attribute\n");
1378 if (strncmp(attr, "device/", 7) == 0)
1379 err(rules->udev, "the 'device' link may not be available in a future kernel, "
1380 "please fix it in %s:%u", filename, lineno);
1381 else if (strstr(attr, "../") != NULL)
1382 err(rules->udev, "do not reference parent sysfs directories directly, "
1383 "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
1384 if (add_rule_key_pair(rules, rule, &rule->attrs, operation, attr, value) != 0)
1390 if (strncasecmp(key, "ENV{", sizeof("ENV{")-1) == 0) {
1391 attr = get_key_attribute(rules, key + sizeof("ENV")-1);
1393 err(rules->udev, "error parsing ENV attribute\n");
1396 if (strncmp(attr, "PHYSDEV", 7) == 0)
1398 if (add_rule_key_pair(rules, rule, &rule->env, operation, attr, value) != 0)
1404 if (strcasecmp(key, "PROGRAM") == 0) {
1405 add_rule_key(rule, &rule->program, operation, value);
1410 if (strcasecmp(key, "RESULT") == 0) {
1411 if (operation != KEY_OP_MATCH &&
1412 operation != KEY_OP_NOMATCH) {
1413 err(rules->udev, "invalid RESULT operation\n");
1416 add_rule_key(rule, &rule->result, operation, value);
1421 if (strncasecmp(key, "IMPORT", sizeof("IMPORT")-1) == 0) {
1422 attr = get_key_attribute(rules, key + sizeof("IMPORT")-1);
1423 if (attr != NULL && strstr(attr, "program")) {
1424 dbg(rules->udev, "IMPORT will be executed\n");
1425 rule->import_type = IMPORT_PROGRAM;
1426 } else if (attr != NULL && strstr(attr, "file")) {
1427 dbg(rules->udev, "IMPORT will be included as file\n");
1428 rule->import_type = IMPORT_FILE;
1429 } else if (attr != NULL && strstr(attr, "parent")) {
1430 dbg(rules->udev, "IMPORT will include the parent values\n");
1431 rule->import_type = IMPORT_PARENT;
1433 /* figure it out if it is executable */
1434 char file[UTIL_PATH_SIZE];
1436 struct stat statbuf;
1438 util_strlcpy(file, value, sizeof(file));
1439 pos = strchr(file, ' ');
1443 /* allow programs in /lib/udev called without the path */
1444 if (strchr(file, '/') == NULL) {
1445 util_strlcpy(file, UDEV_PREFIX "/lib/udev/", sizeof(file));
1446 util_strlcat(file, value, sizeof(file));
1447 pos = strchr(file, ' ');
1452 dbg(rules->udev, "IMPORT auto mode for '%s'\n", file);
1453 if (!lstat(file, &statbuf) && (statbuf.st_mode & S_IXUSR)) {
1454 dbg(rules->udev, "IMPORT is executable, will be executed (autotype)\n");
1455 rule->import_type = IMPORT_PROGRAM;
1457 dbg(rules->udev, "IMPORT is not executable, will be included as file (autotype)\n");
1458 rule->import_type = IMPORT_FILE;
1461 add_rule_key(rule, &rule->import, operation, value);
1466 if (strncasecmp(key, "TEST", sizeof("TEST")-1) == 0) {
1467 if (operation != KEY_OP_MATCH &&
1468 operation != KEY_OP_NOMATCH) {
1469 err(rules->udev, "invalid TEST operation\n");
1472 attr = get_key_attribute(rules, key + sizeof("TEST")-1);
1474 rule->test_mode_mask = strtol(attr, NULL, 8);
1475 add_rule_key(rule, &rule->test, operation, value);
1480 if (strncasecmp(key, "RUN", sizeof("RUN")-1) == 0) {
1481 attr = get_key_attribute(rules, key + sizeof("RUN")-1);
1483 if (strstr(attr, "ignore_error"))
1484 rule->run_ignore_error = 1;
1486 add_rule_key(rule, &rule->run, operation, value);
1491 if (strcasecmp(key, "WAIT_FOR") == 0 || strcasecmp(key, "WAIT_FOR_SYSFS") == 0) {
1492 add_rule_key(rule, &rule->wait_for, operation, value);
1497 if (strcasecmp(key, "LABEL") == 0) {
1498 add_rule_key(rule, &rule->label, operation, value);
1503 if (strcasecmp(key, "GOTO") == 0) {
1504 add_rule_key(rule, &rule->goto_label, operation, value);
1509 if (strncasecmp(key, "NAME", sizeof("NAME")-1) == 0) {
1510 attr = get_key_attribute(rules, key + sizeof("NAME")-1);
1512 if (strstr(attr, "all_partitions") != NULL) {
1513 dbg(rules->udev, "creation of partition nodes requested\n");
1514 rule->partitions = DEFAULT_FAKE_PARTITIONS_COUNT;
1516 if (strstr(attr, "ignore_remove") != NULL) {
1517 dbg(rules->udev, "remove event should be ignored\n");
1518 rule->ignore_remove = 1;
1521 if (value[0] == '\0')
1522 dbg(rules->udev, "name empty, node creation supressed\n");
1523 add_rule_key(rule, &rule->name, operation, value);
1527 if (strcasecmp(key, "SYMLINK") == 0) {
1528 if (operation == KEY_OP_MATCH ||
1529 operation == KEY_OP_NOMATCH)
1530 add_rule_key(rule, &rule->symlink_match, operation, value);
1532 add_rule_key(rule, &rule->symlink, operation, value);
1537 if (strcasecmp(key, "OWNER") == 0) {
1539 if (rules->resolve_names && (!strchr(value, '$') && !strchr(value, '%'))) {
1541 strtoul(value, &endptr, 10);
1542 if (endptr[0] != '\0') {
1544 uid_t uid = util_lookup_user(rules->udev, value);
1545 dbg(rules->udev, "replacing username='%s' by id=%i\n", value, uid);
1546 sprintf(owner, "%u", (unsigned int) uid);
1547 add_rule_key(rule, &rule->owner, operation, owner);
1552 add_rule_key(rule, &rule->owner, operation, value);
1556 if (strcasecmp(key, "GROUP") == 0) {
1558 if (rules->resolve_names && (!strchr(value, '$') && !strchr(value, '%'))) {
1560 strtoul(value, &endptr, 10);
1561 if (endptr[0] != '\0') {
1563 gid_t gid = util_lookup_group(rules->udev, value);
1564 dbg(rules->udev, "replacing groupname='%s' by id=%i\n", value, gid);
1565 sprintf(group, "%u", (unsigned int) gid);
1566 add_rule_key(rule, &rule->group, operation, group);
1571 add_rule_key(rule, &rule->group, operation, value);
1575 if (strcasecmp(key, "MODE") == 0) {
1576 add_rule_key(rule, &rule->mode, operation, value);
1581 if (strcasecmp(key, "OPTIONS") == 0) {
1584 if (strstr(value, "last_rule") != NULL) {
1585 dbg(rules->udev, "last rule to be applied\n");
1586 rule->last_rule = 1;
1588 if (strstr(value, "ignore_device") != NULL) {
1589 dbg(rules->udev, "device should be ignored\n");
1590 rule->ignore_device = 1;
1592 if (strstr(value, "ignore_remove") != NULL) {
1593 dbg(rules->udev, "remove event should be ignored\n");
1594 rule->ignore_remove = 1;
1596 pos = strstr(value, "link_priority=");
1598 rule->link_priority = atoi(&pos[strlen("link_priority=")]);
1599 dbg(rules->udev, "link priority=%i\n", rule->link_priority);
1601 pos = strstr(value, "event_timeout=");
1603 rule->event_timeout = atoi(&pos[strlen("event_timeout=")]);
1604 dbg(rules->udev, "event timout=%i\n", rule->event_timeout);
1606 pos = strstr(value, "string_escape=");
1608 pos = &pos[strlen("string_escape=")];
1609 if (strncmp(pos, "none", strlen("none")) == 0)
1610 rule->string_escape = ESCAPE_NONE;
1611 else if (strncmp(pos, "replace", strlen("replace")) == 0)
1612 rule->string_escape = ESCAPE_REPLACE;
1614 if (strstr(value, "all_partitions") != NULL) {
1615 dbg(rules->udev, "creation of partition nodes requested\n");
1616 rule->partitions = DEFAULT_FAKE_PARTITIONS_COUNT;
1622 err(rules->udev, "unknown key '%s' in %s:%u\n", key, filename, lineno);
1625 if (physdev && rule->wait_for.operation == KEY_OP_UNSET)
1626 err(rules->udev, "PHYSDEV* values are deprecated and will be removed from a future kernel, \n"
1627 "please fix it in %s:%u", filename, lineno);
1629 /* skip line if not any valid key was found */
1633 /* grow buffer and add rule */
1634 rule_size = sizeof(struct udev_rule) + rule->bufsize;
1635 padding = (sizeof(size_t) - rule_size % sizeof(size_t)) % sizeof(size_t);
1636 dbg(rules->udev, "add %zi padding bytes\n", padding);
1637 rule_size += padding;
1638 rule->bufsize += padding;
1640 rules->buf = realloc(rules->buf, rules->bufsize + rule_size);
1642 err(rules->udev, "realloc failed\n");
1645 dbg(rules->udev, "adding rule to offset %zi\n", rules->bufsize);
1646 memcpy(rules->buf + rules->bufsize, rule, rule_size);
1647 rules->bufsize += rule_size;
1652 err(rules->udev, "invalid rule '%s:%u'\n", filename, lineno);
1656 static int parse_file(struct udev_rules *rules, const char *filename)
1659 char line[UTIL_LINE_SIZE];
1661 struct udev_rule *rule;
1662 struct udev_rules_iter iter;
1664 start = rules->bufsize;
1665 info(rules->udev, "reading '%s' as rules file\n", filename);
1667 f = fopen(filename, "r");
1671 while(fgets(line, sizeof(line), f) != NULL) {
1676 /* skip whitespace */
1679 while (isspace(key[0]))
1690 /* continue reading if backslash+newline is found */
1691 while (line[len-2] == '\\') {
1692 if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL)
1698 if (len+1 >= sizeof(line)) {
1699 err(rules->udev, "line too long '%s':%u, ignored\n", filename, line_nr);
1702 add_to_rules(rules, key, filename, line_nr);
1706 /* compute all goto targets within this file */
1707 udev_rules_iter_init(&iter, rules);
1708 udev_rules_iter_goto(&iter, start);
1709 while((rule = udev_rules_iter_next(&iter))) {
1710 if (rule->goto_label.operation != KEY_OP_UNSET) {
1711 char *goto_label = &rule->buf[rule->goto_label.val_off];
1713 dbg(rules->udev, "resolving goto label '%s'\n", goto_label);
1714 rule->goto_rule_off = find_label(&iter, goto_label);
1715 if (rule->goto_rule_off == 0) {
1716 err(rules->udev, "ignore goto to nonexistent label '%s' in '%s'\n",
1717 goto_label, filename);
1718 rule->goto_rule_off = iter.current;
1725 static int add_matching_files(struct udev *udev, struct udev_list_node *file_list, const char *dirname, const char *suffix)
1729 char filename[UTIL_PATH_SIZE];
1731 dbg(udev, "open directory '%s'\n", dirname);
1732 dir = opendir(dirname);
1734 err(udev, "unable to open '%s': %m\n", dirname);
1740 if (ent == NULL || ent->d_name[0] == '\0')
1743 if ((ent->d_name[0] == '.') || (ent->d_name[0] == '#'))
1746 /* look for file matching with specified suffix */
1747 if (suffix != NULL) {
1750 ext = strrchr(ent->d_name, '.');
1753 if (strcmp(ext, suffix) != 0)
1756 dbg(udev, "put file '%s/%s' into list\n", dirname, ent->d_name);
1758 snprintf(filename, sizeof(filename), "%s/%s", dirname, ent->d_name);
1759 filename[sizeof(filename)-1] = '\0';
1760 udev_list_entry_add(udev, file_list, filename, NULL, 1, 1);
1767 struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
1769 struct udev_rules *rules;
1770 struct stat statbuf;
1771 char filename[PATH_MAX];
1772 struct udev_list_node file_list;
1773 struct udev_list_entry *file_loop, *file_tmp;
1775 rules = malloc(sizeof(struct udev_rules));
1778 memset(rules, 0x00, sizeof(struct udev_rules));
1780 rules->resolve_names = resolve_names;
1781 udev_list_init(&file_list);
1783 if (udev_get_rules_path(udev) != NULL) {
1784 /* custom rules location for testing */
1785 add_matching_files(udev, &file_list, udev_get_rules_path(udev), ".rules");
1787 struct udev_list_node sort_list;
1788 struct udev_list_entry *sort_loop, *sort_tmp;
1790 /* read user/custom rules */
1791 add_matching_files(udev, &file_list, SYSCONFDIR "/udev/rules.d", ".rules");
1793 /* read dynamic/temporary rules */
1794 util_strlcpy(filename, udev_get_dev_path(udev), sizeof(filename));
1795 util_strlcat(filename, "/.udev/rules.d", sizeof(filename));
1796 if (stat(filename, &statbuf) != 0) {
1797 util_create_path(udev, filename);
1798 udev_selinux_setfscreatecon(udev, filename, S_IFDIR|0755);
1799 mkdir(filename, 0755);
1800 udev_selinux_resetfscreatecon(udev);
1802 udev_list_init(&sort_list);
1803 add_matching_files(udev, &sort_list, filename, ".rules");
1805 /* read default rules */
1806 add_matching_files(udev, &sort_list, UDEV_PREFIX "/lib/udev/rules.d", ".rules");
1808 /* sort all rules files by basename into list of files */
1809 udev_list_entry_foreach_safe(sort_loop, sort_tmp, udev_list_get_entry(&sort_list)) {
1810 const char *sort_name = udev_list_entry_get_name(sort_loop);
1811 const char *sort_base = strrchr(sort_name, '/');
1813 if (sort_base == NULL)
1816 udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1817 const char *file_name = udev_list_entry_get_name(file_loop);
1818 const char *file_base = strrchr(file_name, '/');
1820 if (file_base == NULL)
1822 if (strcmp(file_base, sort_base) == 0) {
1823 info(udev, "rule file basename '%s' already added, ignoring '%s'\n",
1824 file_name, sort_name);
1825 udev_list_entry_remove(sort_loop);
1829 if (strcmp(file_base, sort_base) > 0)
1832 if (sort_loop != NULL)
1833 udev_list_entry_move_before(sort_loop, file_loop);
1837 /* parse list of files */
1838 udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) {
1839 const char *file_name = udev_list_entry_get_name(file_loop);
1841 if (stat(file_name, &statbuf) == 0 && statbuf.st_size > 0)
1842 parse_file(rules, file_name);
1844 info(udev, "can not read '%s'\n", file_name);
1845 udev_list_entry_remove(file_loop);
1850 void udev_rules_unref(struct udev_rules *rules)