2 * Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
3 * Copyright (C) 2003-2006 Kay Sievers <kay.sievers@vrfy.org>
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation version 2 of the License.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
34 #include "udev_rules.h"
37 /* extract possible {attr} and move str behind it */
38 static char *get_format_attribute(char **str)
44 pos = strchr(*str, '}');
46 err("missing closing brace for format");
52 dbg("attribute='%s', str='%s'", attr, *str);
57 /* extract possible format length and move str behind it*/
58 static int get_format_len(char **str)
63 if (isdigit(*str[0])) {
64 num = (int) strtoul(*str, &tail, 10);
67 dbg("format length=%i", num);
70 err("format parsing error '%s'", *str);
76 static int get_key(char **line, char **key, char **value)
85 if (strchr(linepos, '\\')) {
86 dbg("escaped characters are not supported, skip");
91 while (isspace(linepos[0]))
98 if (linepos[0] == '\0')
100 if (isspace(linepos[0]))
102 if (linepos[0] == '=')
110 /* skip whitespace */
111 while (isspace(linepos[0]))
115 if (linepos[0] == '"') {
117 temp = strchr(linepos, '"');
119 dbg("missing closing quote");
122 dbg("value is quoted");
124 } else if (linepos[0] == '\'') {
126 temp = strchr(linepos, '\'');
128 dbg("missing closing quote");
131 dbg("value is quoted");
133 } else if (linepos[0] == '\0') {
134 dbg("value is empty");
137 while (temp[0] && !isspace(temp[0]))
146 static int import_keys_into_env(struct udevice *udev, const char *buf, size_t bufsize)
148 char line[LINE_SIZE];
157 /* loop through the whole buffer */
160 while (cur < bufsize) {
161 count = buf_get_line(buf, bufsize, cur);
166 if (count >= sizeof(line)) {
167 err("line too long, conf line skipped %s, line %d", udev_config_filename, lineno);
171 /* eat the whitespace */
172 while ((count > 0) && isspace(bufline[0])) {
179 /* see if this is a comment */
180 if (bufline[0] == COMMENT_CHARACTER)
183 memcpy(line, bufline, count);
187 if (get_key(&linepos, &variable, &value) == 0) {
188 dbg("import '%s=%s'", variable, value);
189 name_list_key_add(&udev->env_list, variable, value);
190 setenv(variable, value, 1);
197 static int import_file_into_env(struct udevice *udev, const char *filename)
202 if (file_map(filename, &buf, &bufsize) != 0) {
203 err("can't open '%s': %s", filename, strerror(errno));
206 import_keys_into_env(udev, buf, bufsize);
207 file_unmap(buf, bufsize);
212 static int import_program_into_env(struct udevice *udev, const char *program)
217 if (run_program(program, udev->dev->subsystem, result, sizeof(result), &reslen, (udev_log_priority >= LOG_INFO)) != 0)
219 return import_keys_into_env(udev, result, reslen);
222 static int import_parent_into_env(struct udevice *udev, const char *filter)
224 struct sysfs_device *dev_parent;
227 dev_parent = sysfs_device_get_parent(udev->dev);
228 if (dev_parent != NULL) {
229 struct udevice *udev_parent;
230 struct name_entry *name_loop;
232 dbg("found parent '%s', get the node name", dev_parent->devpath);
233 udev_parent = udev_device_init();
234 if (udev_parent == NULL)
236 /* import the udev_db of the parent */
237 if (udev_db_get_device(udev_parent, dev_parent->devpath) == 0) {
238 dbg("import stored parent env '%s'", udev_parent->name);
239 list_for_each_entry(name_loop, &udev_parent->env_list, node) {
240 char name[NAME_SIZE];
243 strlcpy(name, name_loop->name, sizeof(name));
244 pos = strchr(name, '=');
248 if (fnmatch(filter, name, 0) == 0) {
249 dbg("import key '%s'", name_loop->name);
250 name_list_add(&udev->env_list, name_loop->name, 0);
251 setenv(name, pos, 1);
253 dbg("skip key '%s'", name_loop->name);
258 dbg("parent not found in database");
259 udev_device_cleanup(udev_parent);
265 #define WAIT_LOOP_PER_SECOND 50
266 static int wait_for_sysfs(struct udevice *udev, const char *file, int timeout)
268 char devicepath[PATH_SIZE];
269 char filepath[PATH_SIZE];
271 int loop = timeout * WAIT_LOOP_PER_SECOND;
273 strlcpy(devicepath, sysfs_path, sizeof(devicepath));
274 strlcat(devicepath, udev->dev->devpath, sizeof(devicepath));
275 strlcpy(filepath, devicepath, sizeof(filepath));
276 strlcat(filepath, "/", sizeof(filepath));
277 strlcat(filepath, file, sizeof(filepath));
279 dbg("will wait %i sec for '%s'", timeout, filepath);
282 if (stat(filepath, &stats) == 0) {
283 info("file '%s' appeared after %i loops", filepath, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
286 /* make sure the device does not have disappeared in the meantime */
287 if (stat(devicepath, &stats) != 0) {
288 info("device disappeared while waiting for '%s'", filepath);
291 info("wait for '%s' for %i mseconds", filepath, 1000 / WAIT_LOOP_PER_SECOND);
292 usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND);
294 err("waiting for '%s' failed", filepath);
298 void udev_rules_apply_format(struct udevice *udev, char *string, size_t maxsize)
300 char temp[PATH_SIZE];
301 char temp2[PATH_SIZE];
302 char *head, *tail, *pos, *cpos, *attr, *rest;
321 static const struct subst_map {
324 enum subst_type type;
326 { .name = "devpath", .fmt = 'p', .type = SUBST_DEVPATH },
327 { .name = "number", .fmt = 'n', .type = SUBST_KERNEL_NUMBER },
328 { .name = "kernel", .fmt = 'k', .type = SUBST_KERNEL },
329 { .name = "id", .fmt = 'b', .type = SUBST_ID },
330 { .name = "major", .fmt = 'M', .type = SUBST_MAJOR },
331 { .name = "minor", .fmt = 'm', .type = SUBST_MINOR },
332 { .name = "result", .fmt = 'c', .type = SUBST_RESULT },
333 { .name = "attr", .fmt = 's', .type = SUBST_ATTR },
334 { .name = "sysfs", .fmt = 's', .type = SUBST_ATTR },
335 { .name = "parent", .fmt = 'P', .type = SUBST_PARENT },
336 { .name = "tempnode", .fmt = 'N', .type = SUBST_TEMP_NODE },
337 { .name = "root", .fmt = 'r', .type = SUBST_ROOT },
338 { .name = "env", .fmt = 'E', .type = SUBST_ENV },
341 enum subst_type type;
342 const struct subst_map *subst;
347 while (head[0] != '\0') {
348 if (head[0] == '$') {
349 /* substitute named variable */
352 if (head[1] == '$') {
353 strlcpy(temp, head+2, sizeof(temp));
354 strlcpy(head+1, temp, maxsize);
359 for (subst = map; subst->name; subst++) {
360 if (strncasecmp(&head[1], subst->name, strlen(subst->name)) == 0) {
362 tail = head + strlen(subst->name)+1;
363 dbg("will substitute format name '%s'", subst->name);
367 } else if (head[0] == '%') {
368 /* substitute format char */
371 if (head[1] == '%') {
372 strlcpy(temp, head+2, sizeof(temp));
373 strlcpy(head+1, temp, maxsize);
379 len = get_format_len(&tail);
380 for (subst = map; subst->name; subst++) {
381 if (tail[0] == subst->fmt) {
384 dbg("will substitute format char '%c'", subst->fmt);
393 attr = get_format_attribute(&tail);
394 strlcpy(temp, tail, sizeof(temp));
395 dbg("format=%i, string='%s', tail='%s'", type ,string, tail);
399 strlcat(string, udev->dev->devpath, maxsize);
400 dbg("substitute devpath '%s'", udev->dev->devpath);
403 strlcat(string, udev->dev->kernel, maxsize);
404 dbg("substitute kernel name '%s'", udev->dev->kernel);
406 case SUBST_KERNEL_NUMBER:
407 strlcat(string, udev->dev->kernel_number, maxsize);
408 dbg("substitute kernel number '%s'", udev->dev->kernel_number);
411 if (udev->dev_parent != NULL) {
412 strlcat(string, udev->dev_parent->kernel, maxsize);
413 dbg("substitute id '%s'", udev->dev_parent->kernel);
417 sprintf(temp2, "%d", major(udev->devt));
418 strlcat(string, temp2, maxsize);
419 dbg("substitute major number '%s'", temp2);
422 sprintf(temp2, "%d", minor(udev->devt));
423 strlcat(string, temp2, maxsize);
424 dbg("substitute minor number '%s'", temp2);
427 if (udev->program_result[0] == '\0')
429 /* get part part of the result string */
432 i = strtoul(attr, &rest, 10);
434 dbg("request part #%d of result string", i);
435 cpos = udev->program_result;
437 while (cpos[0] != '\0' && !isspace(cpos[0]))
439 while (isspace(cpos[0]))
443 err("requested part of result string not found");
446 strlcpy(temp2, cpos, sizeof(temp2));
447 /* %{2+}c copies the whole string from the second part on */
448 if (rest[0] != '+') {
449 cpos = strchr(temp2, ' ');
453 strlcat(string, temp2, maxsize);
454 dbg("substitute part of result string '%s'", temp2);
456 strlcat(string, udev->program_result, maxsize);
457 dbg("substitute result string '%s'", udev->program_result);
462 err("missing file parameter for attr");
464 const char *value = NULL;
467 /* first try the current device, other matches may have selected */
468 if (udev->dev_parent != NULL && udev->dev_parent != udev->dev)
469 value = sysfs_attr_get_value(udev->dev_parent->devpath, attr);
471 /* look at all devices along the chain of parents */
473 struct sysfs_device *dev_parent = udev->dev;
476 dbg("looking at '%s'", dev_parent->devpath);
477 value = sysfs_attr_get_value(dev_parent->devpath, attr);
479 strlcpy(temp2, value, sizeof(temp2));
482 dev_parent = sysfs_device_get_parent(dev_parent);
483 } while (dev_parent != NULL);
489 /* strip trailing whitespace and replace untrusted characters of sysfs value */
490 size = strlcpy(temp2, value, sizeof(temp2));
491 if (size >= sizeof(temp2))
492 size = sizeof(temp2)-1;
493 while (size > 0 && isspace(temp2[size-1]))
494 temp2[--size] = '\0';
495 count = replace_untrusted_chars(temp2);
497 info("%i untrusted character(s) replaced" , count);
498 strlcat(string, temp2, maxsize);
499 dbg("substitute sysfs value '%s'", temp2);
504 struct sysfs_device *dev_parent;
506 dev_parent = sysfs_device_get_parent(udev->dev);
507 if (dev_parent != NULL) {
508 struct udevice *udev_parent;
510 dbg("found parent '%s', get the node name", dev_parent->devpath);
511 udev_parent = udev_device_init();
512 if (udev_parent != NULL) {
513 /* lookup the name in the udev_db with the DEVPATH of the parent */
514 if (udev_db_get_device(udev_parent, dev_parent->devpath) == 0) {
515 strlcat(string, udev_parent->name, maxsize);
516 dbg("substitute parent node name'%s'", udev_parent->name);
518 dbg("parent not found in database");
519 udev_device_cleanup(udev_parent);
524 case SUBST_TEMP_NODE:
525 if (udev->tmp_node[0] == '\0') {
526 dbg("create temporary device node for callout");
527 snprintf(udev->tmp_node, sizeof(udev->tmp_node), "%s/.tmp-%u-%u",
528 udev_root, major(udev->devt), minor(udev->devt));
529 udev->tmp_node[sizeof(udev->tmp_node)-1] = '\0';
530 udev_node_mknod(udev, udev->tmp_node, udev->devt, 0600, 0, 0);
532 strlcat(string, udev->tmp_node, maxsize);
533 dbg("substitute temporary device node name '%s'", udev->tmp_node);
536 strlcat(string, udev_root, maxsize);
537 dbg("substitute udev_root '%s'", udev_root);
541 dbg("missing attribute");
546 dbg("env '%s' not available", attr);
549 dbg("substitute env '%s=%s'", attr, pos);
550 strlcat(string, pos, maxsize);
553 err("unknown substitution type=%i", type);
556 /* possibly truncate to format-char specified length */
559 dbg("truncate to %i chars, subtitution string becomes '%s'", len, head);
561 strlcat(string, temp, maxsize);
565 static char *key_val(struct udev_rule *rule, struct key *key)
567 return rule->buf + key->val_off;
570 static char *key_pair_name(struct udev_rule *rule, struct key_pair *pair)
572 return rule->buf + pair->key_name_off;
575 static int match_key(const char *key_name, struct udev_rule *rule, struct key *key, const char *val)
578 char value[PATH_SIZE];
582 if (key->operation != KEY_OP_MATCH &&
583 key->operation != KEY_OP_NOMATCH)
586 strlcpy(value, rule->buf + key->val_off, sizeof(value));
589 dbg("key %s value='%s'", key_name, key_value);
591 pos = strchr(key_value, '|');
596 dbg("match %s '%s' <-> '%s'", key_name, key_value, val);
597 match = (fnmatch(key_value, val, 0) == 0);
598 if (match && (key->operation != KEY_OP_NOMATCH)) {
599 dbg("%s is true (matching value)", key_name);
602 if (!match && (key->operation == KEY_OP_NOMATCH)) {
603 dbg("%s is true (non-matching value)", key_name);
608 dbg("%s is false", key_name);
612 /* match a single rule against a given device and possibly its parent devices */
613 static int match_rule(struct udevice *udev, struct udev_rule *rule)
617 if (match_key("ACTION", rule, &rule->action, udev->action))
620 if (match_key("KERNEL", rule, &rule->kernel, udev->dev->kernel))
623 if (match_key("SUBSYSTEM", rule, &rule->subsystem, udev->dev->subsystem))
626 if (match_key("DEVPATH", rule, &rule->devpath, udev->dev->devpath))
629 if (match_key("DRIVER", rule, &rule->driver, udev->dev->driver))
632 /* match NAME against a value assigned by an earlier rule */
633 if (match_key("NAME", rule, &rule->name, udev->name))
636 for (i = 0; i < rule->env.count; i++) {
637 struct key_pair *pair = &rule->env.keys[i];
639 /* we only check for matches, assignments will be handled later */
640 if (pair->key.operation == KEY_OP_MATCH ||
641 pair->key.operation == KEY_OP_NOMATCH) {
642 const char *key_name = key_pair_name(rule, pair);
643 const char *value = getenv(key_name);
646 dbg("ENV{'%s'} is not set, treat as empty", key_name);
649 if (match_key("ENV", rule, &pair->key, value))
654 if (rule->wait_for_sysfs.operation != KEY_OP_UNSET) {
657 found = (wait_for_sysfs(udev, key_val(rule, &rule->wait_for_sysfs), 3) == 0);
658 if (!found && (rule->wait_for_sysfs.operation != KEY_OP_NOMATCH))
662 /* check for matching sysfs attribute pairs */
663 for (i = 0; i < rule->attr.count; i++) {
664 struct key_pair *pair = &rule->attr.keys[i];
666 if (pair->key.operation == KEY_OP_MATCH ||
667 pair->key.operation == KEY_OP_NOMATCH) {
668 const char *key_name = key_pair_name(rule, pair);
669 const char *key_value = key_val(rule, &pair->key);
671 char val[VALUE_SIZE];
674 value = sysfs_attr_get_value(udev->dev->devpath, key_name);
677 strlcpy(val, value, sizeof(val));
679 /* strip trailing whitespace of value, if not asked to match for it */
680 len = strlen(key_value);
681 if (len > 0 && !isspace(key_value[len-1])) {
683 while (len > 0 && isspace(val[len-1]))
685 dbg("removed %zi trailing whitespace chars from '%s'", strlen(val)-len, val);
688 if (match_key("ATTR", rule, &pair->key, val))
693 /* walk up the chain of parent devices and find a match */
694 udev->dev_parent = udev->dev;
696 /* check for matching kernel device name */
697 if (match_key("KERNELS", rule, &rule->kernels, udev->dev_parent->kernel))
700 /* check for matching subsystem value */
701 if (match_key("SUBSYSTEMS", rule, &rule->subsystems, udev->dev_parent->subsystem))
704 /* check for matching driver */
705 if (match_key("DRIVERS", rule, &rule->drivers, udev->dev_parent->driver))
708 /* check for matching sysfs attribute pairs */
709 for (i = 0; i < rule->attrs.count; i++) {
710 struct key_pair *pair = &rule->attrs.keys[i];
712 if (pair->key.operation == KEY_OP_MATCH ||
713 pair->key.operation == KEY_OP_NOMATCH) {
714 const char *key_name = key_pair_name(rule, pair);
715 const char *key_value = key_val(rule, &pair->key);
717 char val[VALUE_SIZE];
720 value = sysfs_attr_get_value(udev->dev_parent->devpath, key_name);
722 value = sysfs_attr_get_value(udev->dev->devpath, key_name);
725 strlcpy(val, value, sizeof(val));
727 /* strip trailing whitespace of value, if not asked to match for it */
728 len = strlen(key_value);
729 if (len > 0 && !isspace(key_value[len-1])) {
731 while (len > 0 && isspace(val[len-1]))
733 dbg("removed %zi trailing whitespace chars from '%s'", strlen(val)-len, val);
736 if (match_key("ATTRS", rule, &pair->key, val))
741 /* found matching device */
744 /* move to parent device */
745 dbg("try parent sysfs device");
746 udev->dev_parent = sysfs_device_get_parent(udev->dev_parent);
747 if (udev->dev_parent == NULL)
749 dbg("looking at dev_parent->devpath='%s'", udev->dev_parent->devpath);
750 dbg("looking at dev_parent->kernel='%s'", udev->dev_parent->kernel);
753 /* execute external program */
754 if (rule->program.operation != KEY_OP_UNSET) {
755 char program[PATH_SIZE];
756 char result[PATH_SIZE];
758 strlcpy(program, key_val(rule, &rule->program), sizeof(program));
759 udev_rules_apply_format(udev, program, sizeof(program));
760 if (run_program(program, udev->dev->subsystem, result, sizeof(result), NULL, (udev_log_priority >= LOG_INFO)) != 0) {
761 dbg("PROGRAM is false");
762 udev->program_result[0] = '\0';
763 if (rule->program.operation != KEY_OP_NOMATCH)
768 dbg("PROGRAM matches");
769 remove_trailing_chars(result, '\n');
770 count = replace_untrusted_chars(result);
772 info("%i untrusted character(s) replaced" , count);
773 dbg("result is '%s'", result);
774 strlcpy(udev->program_result, result, sizeof(udev->program_result));
775 dbg("PROGRAM returned successful");
776 if (rule->program.operation == KEY_OP_NOMATCH)
779 dbg("PROGRAM key is true");
782 /* check for matching result of external program */
783 if (match_key("RESULT", rule, &rule->result, udev->program_result))
786 /* import variables returned from program or or file into environment */
787 if (rule->import.operation != KEY_OP_UNSET) {
788 char import[PATH_SIZE];
791 strlcpy(import, key_val(rule, &rule->import), sizeof(import));
792 udev_rules_apply_format(udev, import, sizeof(import));
793 dbg("check for IMPORT import='%s'", import);
794 if (rule->import_type == IMPORT_PROGRAM) {
795 rc = import_program_into_env(udev, import);
796 } else if (rule->import_type == IMPORT_FILE) {
797 dbg("import file import='%s'", import);
798 rc = import_file_into_env(udev, import);
799 } else if (rule->import_type == IMPORT_PARENT) {
800 dbg("import parent import='%s'", import);
801 rc = import_parent_into_env(udev, import);
804 dbg("IMPORT failed");
805 if (rule->import.operation != KEY_OP_NOMATCH)
808 dbg("IMPORT '%s' imported", key_val(rule, &rule->import));
809 dbg("IMPORT key is true");
812 /* rule matches, if we have ENV assignments export it */
813 for (i = 0; i < rule->env.count; i++) {
814 struct key_pair *pair = &rule->env.keys[i];
816 if (pair->key.operation == KEY_OP_ASSIGN) {
817 char temp_value[NAME_SIZE];
818 const char *key_name = key_pair_name(rule, pair);
819 const char *value = key_val(rule, &pair->key);
822 /* make sure we don't write to the same string we possibly read from */
823 strlcpy(temp_value, value, sizeof(temp_value));
824 udev_rules_apply_format(udev, temp_value, NAME_SIZE);
826 key_value = name_list_key_add(&udev->env_list, key_name, temp_value);
827 if (key_value == NULL)
831 dbg("export ENV '%s'", key_value);
835 /* if we have ATTR assignements write value to sysfs file */
836 for (i = 0; i < rule->attr.count; i++) {
837 struct key_pair *pair = &rule->attr.keys[i];
839 if (pair->key.operation == KEY_OP_ASSIGN) {
840 const char *key_name = key_pair_name(rule, pair);
841 const char *key_value = key_val(rule, &pair->key);
842 char attr[PATH_SIZE];
845 strlcpy(attr, sysfs_path, sizeof(attr));
846 strlcat(attr, udev->dev->devpath, sizeof(attr));
847 strlcat(attr, "/", sizeof(attr));
848 strlcat(attr, key_name, sizeof(attr));
849 dbg("write '%s' to '%s'", key_value, attr);
850 f = fopen(attr, "w");
852 if (fprintf(f, "%s\n", key_value) <= 0)
853 err("error writing ATTR{%s}: %s", attr, strerror(errno));
856 err("error opening ATTR{%s} for writing: %s", attr, strerror(errno));
865 int udev_rules_get_name(struct udev_rules *rules, struct udevice *udev)
867 struct udev_rule *rule;
870 dbg("udev->dev->devpath='%s'", udev->dev->devpath);
871 dbg("udev->dev->kernel='%s'", udev->dev->kernel);
873 /* look for a matching rule to apply */
874 udev_rules_iter_init(rules);
876 rule = udev_rules_iter_next(rules);
881 (rule->name.operation == KEY_OP_ASSIGN ||
882 rule->name.operation == KEY_OP_ASSIGN_FINAL ||
883 rule->name.operation == KEY_OP_ADD)) {
884 dbg("node name already set, rule ignored");
889 if (match_rule(udev, rule) == 0) {
891 if (rule->ignore_device) {
892 info("rule applied, '%s' is ignored", udev->dev->kernel);
893 udev->ignore_device = 1;
896 if (rule->ignore_remove) {
897 udev->ignore_remove = 1;
898 dbg("remove event should be ignored");
900 /* apply all_partitions option only at a main block device */
901 if (rule->partitions &&
902 strcmp(udev->dev->subsystem, "block") == 0 && udev->dev->kernel_number[0] == '\0') {
903 udev->partitions = rule->partitions;
904 dbg("creation of partition nodes requested");
907 /* apply permissions */
908 if (!udev->mode_final && rule->mode != 0000) {
909 if (rule->mode_operation == KEY_OP_ASSIGN_FINAL)
910 udev->mode_final = 1;
911 udev->mode = rule->mode;
912 dbg("applied mode=%#o to '%s'", rule->mode, udev->dev->kernel);
914 if (!udev->owner_final && rule->owner.operation != KEY_OP_UNSET) {
915 if (rule->owner.operation == KEY_OP_ASSIGN_FINAL)
916 udev->owner_final = 1;
917 strlcpy(udev->owner, key_val(rule, &rule->owner), sizeof(udev->owner));
918 udev_rules_apply_format(udev, udev->owner, sizeof(udev->owner));
919 dbg("applied owner='%s' to '%s'", udev->owner, udev->dev->kernel);
921 if (!udev->group_final && rule->group.operation != KEY_OP_UNSET) {
922 if (rule->group.operation == KEY_OP_ASSIGN_FINAL)
923 udev->group_final = 1;
924 strlcpy(udev->group, key_val(rule, &rule->group), sizeof(udev->group));
925 udev_rules_apply_format(udev, udev->group, sizeof(udev->group));
926 dbg("applied group='%s' to '%s'", udev->group, udev->dev->kernel);
929 /* collect symlinks */
930 if (!udev->symlink_final && rule->symlink.operation != KEY_OP_UNSET) {
931 char temp[PATH_SIZE];
935 if (rule->symlink.operation == KEY_OP_ASSIGN_FINAL)
936 udev->symlink_final = 1;
937 if (rule->symlink.operation == KEY_OP_ASSIGN || rule->symlink.operation == KEY_OP_ASSIGN_FINAL) {
938 info("reset symlink list");
939 name_list_cleanup(&udev->symlink_list);
941 strlcpy(temp, key_val(rule, &rule->symlink), sizeof(temp));
942 udev_rules_apply_format(udev, temp, sizeof(temp));
943 count = replace_untrusted_chars(temp);
945 info("%i untrusted character(s) replaced" , count);
946 dbg("rule applied, added symlink(s) '%s'", temp);
948 /* add multiple symlinks separated by spaces */
950 while (isspace(pos[0]))
952 next = strchr(pos, ' ');
955 info("add symlink '%s'", pos);
956 name_list_add(&udev->symlink_list, pos, 0);
957 while (isspace(next[1]))
960 next = strchr(pos, ' ');
962 if (pos[0] != '\0') {
963 info("add symlink '%s'", pos);
964 name_list_add(&udev->symlink_list, pos, 0);
968 /* set name, later rules with name set will be ignored */
969 if (rule->name.operation == KEY_OP_ASSIGN ||
970 rule->name.operation == KEY_OP_ASSIGN_FINAL ||
971 rule->name.operation == KEY_OP_ADD) {
975 strlcpy(udev->name, key_val(rule, &rule->name), sizeof(udev->name));
976 udev_rules_apply_format(udev, udev->name, sizeof(udev->name));
977 count = replace_untrusted_chars(udev->name);
979 info("%i untrusted character(s) replaced", count);
981 info("rule applied, '%s' becomes '%s'", udev->dev->kernel, udev->name);
982 if (strcmp(udev->dev->subsystem, "net") != 0)
983 dbg("name, '%s' is going to have owner='%s', group='%s', mode=%#o partitions=%i",
984 udev->name, udev->owner, udev->group, udev->mode, udev->partitions);
987 if (!udev->run_final && rule->run.operation != KEY_OP_UNSET) {
988 if (rule->run.operation == KEY_OP_ASSIGN_FINAL)
990 if (rule->run.operation == KEY_OP_ASSIGN || rule->run.operation == KEY_OP_ASSIGN_FINAL) {
991 info("reset run list");
992 name_list_cleanup(&udev->run_list);
994 dbg("add run '%s'", key_val(rule, &rule->run));
995 name_list_add(&udev->run_list, key_val(rule, &rule->run), 0);
998 if (rule->last_rule) {
999 dbg("last rule to be applied");
1003 if (rule->goto_label.operation != KEY_OP_UNSET) {
1004 dbg("moving forward to label '%s'", key_val(rule, &rule->goto_label));
1005 udev_rules_iter_label(rules, key_val(rule, &rule->goto_label));
1011 strlcpy(udev->name, udev->dev->kernel, sizeof(udev->name));
1012 info("no node name set, will use kernel name '%s'", udev->name);
1015 if (udev->tmp_node[0] != '\0') {
1016 dbg("removing temporary device node");
1017 unlink_secure(udev->tmp_node);
1018 udev->tmp_node[0] = '\0';
1024 int udev_rules_get_run(struct udev_rules *rules, struct udevice *udev)
1026 struct udev_rule *rule;
1028 dbg("udev->kernel='%s'", udev->dev->kernel);
1030 /* look for a matching rule to apply */
1031 udev_rules_iter_init(rules);
1033 rule = udev_rules_iter_next(rules);
1037 dbg("process rule");
1038 if (rule->name.operation != KEY_OP_UNSET || rule->symlink.operation != KEY_OP_UNSET ||
1039 rule->mode_operation != KEY_OP_UNSET || rule->owner.operation != KEY_OP_UNSET || rule->group.operation != KEY_OP_UNSET) {
1040 dbg("skip rule that names a device");
1044 if (match_rule(udev, rule) == 0) {
1045 if (rule->ignore_device) {
1046 info("rule applied, '%s' is ignored", udev->dev->kernel);
1047 udev->ignore_device = 1;
1051 if (!udev->run_final && rule->run.operation != KEY_OP_UNSET) {
1052 if (rule->run.operation == KEY_OP_ASSIGN || rule->run.operation == KEY_OP_ASSIGN_FINAL) {
1053 info("reset run list");
1054 name_list_cleanup(&udev->run_list);
1056 dbg("add run '%s'", key_val(rule, &rule->run));
1057 name_list_add(&udev->run_list, key_val(rule, &rule->run), 0);
1058 if (rule->run.operation == KEY_OP_ASSIGN_FINAL)
1062 if (rule->last_rule) {
1063 dbg("last rule to be applied");
1067 if (rule->goto_label.operation != KEY_OP_UNSET) {
1068 dbg("moving forward to label '%s'", key_val(rule, &rule->goto_label));
1069 udev_rules_iter_label(rules, key_val(rule, &rule->goto_label));