4 * Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
5 * Copyright (C) 2003-2005 Kay Sievers <kay.sievers@vrfy.org>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation version 2 of the License.
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
16 * You should have received a copy of the GNU General Public License along
17 * with this program; if not, write to the Free Software Foundation, Inc.,
18 * 675 Mass Ave, Cambridge, MA 02139, USA.
34 #include "libsysfs/sysfs/libsysfs.h"
36 #include "udev_libc_wrapper.h"
38 #include "udev_utils.h"
39 #include "udev_version.h"
41 #include "udev_rules.h"
45 /* extract possible {attr} and move str behind it */
46 static char *get_format_attribute(char **str)
52 pos = strchr(*str, '}');
54 err("missing closing brace for format");
60 dbg("attribute='%s', str='%s'", attr, *str);
65 /* extract possible format length and move str behind it*/
66 static int get_format_len(char **str)
71 if (isdigit(*str[0])) {
72 num = (int) strtoul(*str, &tail, 10);
75 dbg("format length=%i", num);
78 err("format parsing error '%s'", *str);
84 static int get_key(char **line, char **key, char **value)
93 if (strchr(linepos, '\\')) {
94 dbg("escaped characters are not supported, skip");
99 while (isspace(linepos[0]))
106 if (linepos[0] == '\0')
108 if (isspace(linepos[0]))
110 if (linepos[0] == '=')
118 /* skip whitespace */
119 while (isspace(linepos[0]))
123 if (linepos[0] == '"') {
125 temp = strchr(linepos, '"');
127 dbg("missing closing quote");
130 dbg("value is quoted");
132 } else if (linepos[0] == '\'') {
134 temp = strchr(linepos, '\'');
136 dbg("missing closing quote");
139 dbg("value is quoted");
141 } else if (linepos[0] == '\0') {
142 dbg("value is empty");
145 while (temp[0] && !isspace(temp[0]))
154 static int import_keys_into_env(struct udevice *udev, const char *buf, size_t bufsize)
156 char line[LINE_SIZE];
165 /* loop through the whole buffer */
168 while (cur < bufsize) {
169 count = buf_get_line(buf, bufsize, cur);
174 if (count >= sizeof(line)) {
175 err("line too long, conf line skipped %s, line %d", udev_config_filename, lineno);
179 /* eat the whitespace */
180 while ((count > 0) && isspace(bufline[0])) {
187 /* see if this is a comment */
188 if (bufline[0] == COMMENT_CHARACTER)
191 memcpy(line, bufline, count);
195 if (get_key(&linepos, &variable, &value) == 0) {
196 dbg("import '%s=%s'", variable, value);
197 name_list_key_add(&udev->env_list, variable, value);
198 setenv(variable, value, 1);
205 static int import_file_into_env(struct udevice *udev, const char *filename)
210 if (file_map(filename, &buf, &bufsize) != 0) {
211 err("can't open '%s'", filename);
214 import_keys_into_env(udev, buf, bufsize);
215 file_unmap(buf, bufsize);
220 static int import_program_into_env(struct udevice *udev, const char *program)
225 if (run_program(program, udev->subsystem, result, sizeof(result), &reslen, (udev_log_priority >= LOG_INFO)) != 0)
227 return import_keys_into_env(udev, result, reslen);
230 static int import_parent_into_env(struct udevice *udev, struct sysfs_class_device *class_dev, const char *filter)
232 struct sysfs_class_device *parent = sysfs_get_classdev_parent(class_dev);
235 if (parent != NULL) {
236 struct udevice udev_parent;
237 struct name_entry *name_loop;
239 dbg("found parent '%s', get the node name", parent->path);
240 udev_init_device(&udev_parent, NULL, NULL, NULL);
241 /* import the udev_db of the parent */
242 if (udev_db_get_device(&udev_parent, &parent->path[strlen(sysfs_path)]) == 0) {
243 dbg("import stored parent env '%s'", udev_parent.name);
244 list_for_each_entry(name_loop, &udev_parent.env_list, node) {
245 char name[NAME_SIZE];
248 strlcpy(name, name_loop->name, sizeof(name));
249 pos = strchr(name, '=');
253 if (strcmp_pattern(filter, name) == 0) {
254 dbg("import key '%s'", name_loop->name);
255 name_list_add(&udev->env_list, name_loop->name, 0);
256 setenv(name, pos, 1);
258 dbg("skip key '%s'", name_loop->name);
263 dbg("parent not found in database");
264 udev_cleanup_device(&udev_parent);
270 /* finds the lowest positive N such that <name>N isn't present in the udevdb
271 * if <name> doesn't exist, 0 is returned, N otherwise
273 static int find_free_number(const char *name, const char *devpath)
275 char db_devpath[PATH_SIZE];
276 char filename[PATH_SIZE];
279 strlcpy(filename, name, sizeof(filename));
281 dbg("look for existing node '%s'", filename);
282 if (udev_db_lookup_name(filename, db_devpath, sizeof(db_devpath)) != 0) {
283 dbg("free num=%d", num);
289 err("find_free_number aborted at num=%d", num);
293 snprintf(filename, sizeof(filename), "%s%d", name, num);
294 filename[sizeof(filename)-1] = '\0';
300 static int find_sysfs_attribute(struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device,
301 const char *name, char *value, size_t len)
303 struct sysfs_class_device *class_dev_parent;
304 struct sysfs_attribute *tmpattr;
306 dbg("look for device attribute '%s'", name);
308 dbg("look for class attribute '%s/%s'", class_dev->path, name);
309 tmpattr = sysfs_get_classdev_attr(class_dev, name);
312 class_dev_parent = sysfs_get_classdev_parent(class_dev);
313 if (class_dev_parent) {
314 tmpattr = sysfs_get_classdev_attr(class_dev_parent, name);
320 dbg("look for devices attribute '%s/%s'", sysfs_device->path, name);
321 tmpattr = sysfs_get_device_attr(sysfs_device, name);
328 strlcpy(value, tmpattr->value, len);
329 remove_trailing_chars(value, '\n');
331 dbg("found attribute '%s'", tmpattr->path);
335 #define WAIT_LOOP_PER_SECOND 20
336 static int wait_for_sysfs(struct udevice *udev, const char *file, int timeout)
338 char filename[PATH_SIZE];
340 int loop = timeout * WAIT_LOOP_PER_SECOND;
342 snprintf(filename, sizeof(filename), "%s%s/%s", sysfs_path, udev->devpath, file);
343 filename[sizeof(filename)-1] = '\0';
344 dbg("wait %i sec for '%s'", timeout, filename);
347 if (stat(filename, &stats) == 0) {
348 dbg("file appeared after %i loops", (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
351 usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND);
353 dbg("waiting for '%s' failed", filename);
357 static void apply_format(struct udevice *udev, char *string, size_t maxsize,
358 struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device)
360 char temp[PATH_SIZE];
361 char temp2[PATH_SIZE];
362 char *head, *tail, *pos, *cpos, *attr, *rest;
366 unsigned int next_free_number;
367 struct sysfs_class_device *class_dev_parent;
385 static const struct subst_map {
388 enum subst_type type;
390 { .name = "devpath", .fmt = 'p', .type = SUBST_DEVPATH },
391 { .name = "id", .fmt = 'b', .type = SUBST_ID },
392 { .name = "number", .fmt = 'n', .type = SUBST_KERNEL_NUMBER },
393 { .name = "kernel", .fmt = 'k', .type = SUBST_KERNEL_NAME },
394 { .name = "major", .fmt = 'M', .type = SUBST_MAJOR },
395 { .name = "minor", .fmt = 'm', .type = SUBST_MINOR },
396 { .name = "result", .fmt = 'c', .type = SUBST_RESULT },
397 { .name = "sysfs", .fmt = 's', .type = SUBST_SYSFS },
398 { .name = "enum", .fmt = 'e', .type = SUBST_ENUM },
399 { .name = "parent", .fmt = 'P', .type = SUBST_PARENT },
400 { .name = "tempnode", .fmt = 'N', .type = SUBST_TEMP_NODE },
401 { .name = "root", .fmt = 'r', .type = SUBST_ROOT },
402 { .name = "modalias", .fmt = 'A', .type = SUBST_MODALIAS },
403 { .name = "env", .fmt = 'E', .type = SUBST_ENV },
406 enum subst_type type;
407 const struct subst_map *subst;
412 while (head[0] != '\0') {
413 if (head[0] == '$') {
414 /* substitute named variable */
417 if (head[1] == '$') {
418 strlcpy(temp, head+2, sizeof(temp));
419 strlcpy(head+1, temp, maxsize);
424 for (subst = map; subst->name; subst++) {
425 if (strncasecmp(&head[1], subst->name, strlen(subst->name)) == 0) {
427 tail = head + strlen(subst->name)+1;
428 dbg("will substitute format name '%s'", subst->name);
433 else if (head[0] == '%') {
434 /* substitute format char */
437 if (head[1] == '%') {
438 strlcpy(temp, head+2, sizeof(temp));
439 strlcpy(head+1, temp, maxsize);
445 len = get_format_len(&tail);
446 for (subst = map; subst->name; subst++) {
447 if (tail[0] == subst->fmt) {
450 dbg("will substitute format char '%c'", subst->fmt);
459 attr = get_format_attribute(&tail);
460 strlcpy(temp, tail, sizeof(temp));
461 dbg("format=%i, string='%s', tail='%s', class_dev=%p, sysfs_dev=%p",
462 type ,string, tail, class_dev, sysfs_device);
466 strlcat(string, udev->devpath, maxsize);
467 dbg("substitute devpath '%s'", udev->devpath);
470 strlcat(string, udev->bus_id, maxsize);
471 dbg("substitute bus_id '%s'", udev->bus_id);
473 case SUBST_KERNEL_NAME:
474 strlcat(string, udev->kernel_name, maxsize);
475 dbg("substitute kernel name '%s'", udev->kernel_name);
477 case SUBST_KERNEL_NUMBER:
478 strlcat(string, udev->kernel_number, maxsize);
479 dbg("substitute kernel number '%s'", udev->kernel_number);
482 sprintf(temp2, "%d", major(udev->devt));
483 strlcat(string, temp2, maxsize);
484 dbg("substitute major number '%s'", temp2);
487 sprintf(temp2, "%d", minor(udev->devt));
488 strlcat(string, temp2, maxsize);
489 dbg("substitute minor number '%s'", temp2);
492 if (udev->program_result[0] == '\0')
494 /* get part part of the result string */
497 i = strtoul(attr, &rest, 10);
499 dbg("request part #%d of result string", i);
500 cpos = udev->program_result;
502 while (cpos[0] != '\0' && !isspace(cpos[0]))
504 while (isspace(cpos[0]))
508 err("requested part of result string not found");
511 strlcpy(temp2, cpos, sizeof(temp2));
512 /* %{2+}c copies the whole string from the second part on */
513 if (rest[0] != '+') {
514 cpos = strchr(temp2, ' ');
518 strlcat(string, temp2, maxsize);
519 dbg("substitute part of result string '%s'", temp2);
521 strlcat(string, udev->program_result, maxsize);
522 dbg("substitute result string '%s'", udev->program_result);
527 dbg("missing attribute");
530 if (find_sysfs_attribute(class_dev, sysfs_device, attr, temp2, sizeof(temp2)) != 0) {
531 struct sysfs_device *parent_device;
533 dbg("sysfs attribute '%s' not found, walk up the physical devices", attr);
534 parent_device = sysfs_get_device_parent(sysfs_device);
535 while (parent_device) {
536 dbg("looking at '%s'", parent_device->path);
537 if (find_sysfs_attribute(NULL, parent_device, attr, temp2, sizeof(temp2)) == 0)
539 parent_device = sysfs_get_device_parent(parent_device);
544 /* strip trailing whitespace of sysfs value */
546 while (i > 0 && isspace(temp2[i-1]))
548 count = replace_untrusted_chars(temp2);
550 info("%i untrusted character(s) replaced" , count);
551 strlcat(string, temp2, maxsize);
552 dbg("substitute sysfs value '%s'", temp2);
555 next_free_number = find_free_number(string, udev->devpath);
556 if (next_free_number > 0) {
557 sprintf(temp2, "%d", next_free_number);
558 strlcat(string, temp2, maxsize);
564 class_dev_parent = sysfs_get_classdev_parent(class_dev);
565 if (class_dev_parent != NULL) {
566 struct udevice udev_parent;
568 dbg("found parent '%s', get the node name", class_dev_parent->path);
569 udev_init_device(&udev_parent, NULL, NULL, NULL);
570 /* lookup the name in the udev_db with the DEVPATH of the parent */
571 if (udev_db_get_device(&udev_parent, &class_dev_parent->path[strlen(sysfs_path)]) == 0) {
572 strlcat(string, udev_parent.name, maxsize);
573 dbg("substitute parent node name'%s'", udev_parent.name);
575 dbg("parent not found in database");
576 udev_cleanup_device(&udev_parent);
579 case SUBST_TEMP_NODE:
580 if (udev->tmp_node[0] == '\0') {
581 dbg("create temporary device node for callout");
582 snprintf(udev->tmp_node, sizeof(udev->tmp_node), "%s/.tmp-%u-%u",
583 udev_root, major(udev->devt), minor(udev->devt));
584 udev->tmp_node[sizeof(udev->tmp_node)-1] = '\0';
585 udev_make_node(udev, udev->tmp_node, udev->devt, 0600, 0, 0);
587 strlcat(string, udev->tmp_node, maxsize);
588 dbg("substitute temporary device node name '%s'", udev->tmp_node);
591 strlcat(string, udev_root, maxsize);
592 dbg("substitute udev_root '%s'", udev_root);
595 if (find_sysfs_attribute(NULL, sysfs_device, "modalias", temp2, sizeof(temp2)) != 0)
597 strlcat(string, temp2, maxsize);
598 dbg("substitute MODALIAS '%s'", temp2);
602 dbg("missing attribute");
607 dbg("env '%s' not avialable", attr);
610 dbg("substitute env '%s=%s'", attr, pos);
611 strlcat(string, pos, maxsize);
614 err("unknown substitution type=%i", type);
617 /* possibly truncate to format-char specified length */
620 dbg("truncate to %i chars, subtitution string becomes '%s'", len, head);
622 strlcat(string, temp, maxsize);
626 static char *key_val(struct udev_rule *rule, struct key *key)
628 return rule->buf + key->val_off;
631 static char *key_pair_name(struct udev_rule *rule, struct key_pair *pair)
633 return rule->buf + pair->key_name_off;
636 static int match_key(const char *key_name, struct udev_rule *rule, struct key *key, const char *val)
639 char value[PATH_SIZE];
643 if (key->operation == KEY_OP_UNSET)
646 strlcpy(value, rule->buf + key->val_off, sizeof(value));
649 dbg("key %s value='%s'", key_name, key_value);
651 pos = strchr(key_value, '|');
656 dbg("match %s '%s' <-> '%s'", key_name, key_value, val);
657 match = (strcmp_pattern(key_value, val) == 0);
658 if (match && (key->operation != KEY_OP_NOMATCH)) {
659 dbg("%s is true (matching value)", key_name);
662 if (!match && (key->operation == KEY_OP_NOMATCH)) {
663 dbg("%s is true (non-matching value)", key_name);
668 dbg("%s is false", key_name);
672 static int match_rule(struct udevice *udev, struct udev_rule *rule,
673 struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device)
675 struct sysfs_device *parent_device = sysfs_device;
678 if (match_key("ACTION", rule, &rule->action, udev->action))
681 if (match_key("KERNEL", rule, &rule->kernel_name, udev->kernel_name))
684 if (match_key("SUBSYSTEM", rule, &rule->subsystem, udev->subsystem))
687 if (match_key("DEVPATH", rule, &rule->devpath, udev->devpath))
690 if (rule->modalias.operation != KEY_OP_UNSET) {
691 char value[NAME_SIZE];
693 if (find_sysfs_attribute(NULL, sysfs_device, "modalias", value, sizeof(value)) != 0) {
694 dbg("MODALIAS value not found");
697 if (match_key("MODALIAS", rule, &rule->modalias, value))
701 for (i = 0; i < rule->env.count; i++) {
702 struct key_pair *pair = &rule->env.keys[i];
704 /* we only check for matches, assignments will be handled later */
705 if (pair->key.operation != KEY_OP_ASSIGN) {
706 const char *key_name = key_pair_name(rule, pair);
707 const char *value = getenv(key_name);
710 dbg("ENV{'%s'} is not set, treat as empty", key_name);
713 if (match_key("ENV", rule, &pair->key, value))
718 if (rule->wait_for_sysfs.operation != KEY_OP_UNSET) {
721 match = (wait_for_sysfs(udev, key_val(rule, &rule->wait_for_sysfs), 3) == 0);
722 if (match && (rule->wait_for_sysfs.operation != KEY_OP_NOMATCH)) {
723 dbg("WAIT_FOR_SYSFS is true (matching value)");
726 if (!match && (rule->wait_for_sysfs.operation == KEY_OP_NOMATCH)) {
727 dbg("WAIT_FOR_SYSFS is true, (non matching value)");
730 dbg("WAIT_FOR_SYSFS is false");
734 /* walk up the chain of physical devices and find a match */
736 /* check for matching driver */
737 if (rule->driver.operation != KEY_OP_UNSET) {
738 if (parent_device == NULL) {
739 dbg("device has no sysfs_device");
742 if (match_key("DRIVER", rule, &rule->driver, parent_device->driver_name))
746 /* check for matching bus value */
747 if (rule->bus.operation != KEY_OP_UNSET) {
748 if (parent_device == NULL) {
749 dbg("device has no sysfs_device");
752 if (match_key("BUS", rule, &rule->bus, parent_device->bus))
756 /* check for matching bus id */
757 if (rule->id.operation != KEY_OP_UNSET) {
758 if (parent_device == NULL) {
759 dbg("device has no sysfs_device");
762 if (match_key("ID", rule, &rule->id, parent_device->bus_id))
766 /* check for matching sysfs pairs */
767 if (rule->sysfs.count) {
768 dbg("check %i SYSFS keys", rule->sysfs.count);
769 for (i = 0; i < rule->sysfs.count; i++) {
770 struct key_pair *pair = &rule->sysfs.keys[i];
771 const char *key_name = key_pair_name(rule, pair);
772 const char *key_value = key_val(rule, &pair->key);
773 char value[VALUE_SIZE];
776 if (find_sysfs_attribute(class_dev, parent_device, key_name, value, sizeof(value)) != 0)
779 /* strip trailing whitespace of value, if not asked to match for it */
780 len = strlen(key_value);
781 if (len && !isspace(key_value[len-1])) {
783 while (len > 0 && isspace(value[len-1]))
785 dbg("removed %zi trailing whitespace chars from '%s'", strlen(value)-len, value);
788 if (match_key("SYSFS", rule, &pair->key, value))
791 dbg("all %i SYSFS keys matched", rule->sysfs.count);
794 /* found matching physical device */
797 dbg("try parent sysfs device");
798 parent_device = sysfs_get_device_parent(parent_device);
799 if (parent_device == NULL)
801 dbg("look at sysfs_device->path='%s'", parent_device->path);
802 dbg("look at sysfs_device->bus_id='%s'", parent_device->bus_id);
805 /* execute external program */
806 if (rule->program.operation != KEY_OP_UNSET) {
807 char program[PATH_SIZE];
808 char result[PATH_SIZE];
810 strlcpy(program, key_val(rule, &rule->program), sizeof(program));
811 apply_format(udev, program, sizeof(program), class_dev, sysfs_device);
812 if (run_program(program, udev->subsystem, result, sizeof(result), NULL, (udev_log_priority >= LOG_INFO)) != 0) {
813 dbg("PROGRAM is false");
814 udev->program_result[0] = '\0';
815 if (rule->program.operation != KEY_OP_NOMATCH)
820 dbg("PROGRAM matches");
821 remove_trailing_chars(result, '\n');
822 count = replace_untrusted_chars(result);
824 info("%i untrusted character(s) replaced" , count);
825 dbg("result is '%s'", result);
826 strlcpy(udev->program_result, result, sizeof(udev->program_result));
827 dbg("PROGRAM returned successful");
828 if (rule->program.operation == KEY_OP_NOMATCH)
831 dbg("PROGRAM key is true");
834 /* check for matching result of external program */
835 if (match_key("RESULT", rule, &rule->result, udev->program_result))
838 /* import variables returned from program or or file into environment */
839 if (rule->import.operation != KEY_OP_UNSET) {
840 char import[PATH_SIZE];
843 strlcpy(import, key_val(rule, &rule->import), sizeof(import));
844 apply_format(udev, import, sizeof(import), class_dev, sysfs_device);
845 dbg("check for IMPORT import='%s'", import);
846 if (rule->import_type == IMPORT_PROGRAM) {
847 rc = import_program_into_env(udev, import);
848 } else if (rule->import_type == IMPORT_FILE) {
849 dbg("import file import='%s'", import);
850 rc = import_file_into_env(udev, import);
851 } else if (rule->import_type == IMPORT_PARENT && class_dev) {
852 dbg("import parent import='%s'", import);
853 rc = import_parent_into_env(udev, class_dev, import);
856 dbg("IMPORT failed");
857 if (rule->import.operation != KEY_OP_NOMATCH)
860 dbg("IMPORT '%s' imported", key_val(rule, &rule->import));
861 dbg("IMPORT key is true");
864 /* rule matches, if we have ENV assignments export it */
865 for (i = 0; i < rule->env.count; i++) {
866 struct key_pair *pair = &rule->env.keys[i];
868 if (pair->key.operation == KEY_OP_ASSIGN) {
869 const char *key_name = key_pair_name(rule, pair);
870 const char *value = key_val(rule, &pair->key);
872 name_list_key_add(&udev->env_list, key_name, value);
873 setenv(key_name, value, 1);
874 dbg("export ENV '%s=%s'", key_name, value);
884 int udev_rules_get_name(struct udev_rules *rules, struct udevice *udev, struct sysfs_class_device *class_dev)
886 struct sysfs_class_device *class_dev_parent;
887 struct sysfs_device *sysfs_device = NULL;
888 struct udev_rule *rule;
891 dbg("class_dev->name='%s'", class_dev->name);
893 /* Figure out where the "device"-symlink is at. For char devices this will
894 * always be in the class_dev->path. On block devices, only the main block
895 * device will have the device symlink in it's path. All partition devices
896 * need to look at the symlink in its parent directory.
898 class_dev_parent = sysfs_get_classdev_parent(class_dev);
899 if (class_dev_parent != NULL) {
900 dbg("given class device has a parent, use this instead");
901 sysfs_device = sysfs_get_classdev_device(class_dev_parent);
903 sysfs_device = sysfs_get_classdev_device(class_dev);
907 dbg("found devices device: path='%s', bus_id='%s', bus='%s'",
908 sysfs_device->path, sysfs_device->bus_id, sysfs_device->bus);
909 strlcpy(udev->bus_id, sysfs_device->bus_id, sizeof(udev->bus_id));
912 dbg("udev->kernel_name='%s'", udev->kernel_name);
914 /* look for a matching rule to apply */
915 udev_rules_iter_init(rules);
917 rule = udev_rules_iter_next(rules);
921 if (name_set && rule->name.operation != KEY_OP_UNSET) {
922 dbg("node name already set, rule ignored");
927 if (match_rule(udev, rule, class_dev, sysfs_device) == 0) {
929 if (rule->ignore_device) {
930 info("rule applied, '%s' is ignored", udev->kernel_name);
931 udev->ignore_device = 1;
934 if (rule->ignore_remove) {
935 udev->ignore_remove = 1;
936 dbg("remove event should be ignored");
938 /* apply all_partitions option only at a main block device */
939 if (rule->partitions && udev->type == DEV_BLOCK && udev->kernel_number[0] == '\0') {
940 udev->partitions = rule->partitions;
941 dbg("creation of partition nodes requested");
944 /* apply permissions */
945 if (!udev->mode_final && rule->mode != 0000) {
946 if (rule->mode_operation == KEY_OP_ASSIGN_FINAL)
947 udev->mode_final = 1;
948 udev->mode = rule->mode;
949 dbg("applied mode=%#o to '%s'", rule->mode, udev->kernel_name);
951 if (!udev->owner_final && rule->owner.operation != KEY_OP_UNSET) {
952 if (rule->owner.operation == KEY_OP_ASSIGN_FINAL)
953 udev->owner_final = 1;
954 strlcpy(udev->owner, key_val(rule, &rule->owner), sizeof(udev->owner));
955 apply_format(udev, udev->owner, sizeof(udev->owner), class_dev, sysfs_device);
956 dbg("applied owner='%s' to '%s'", udev->owner, udev->kernel_name);
958 if (!udev->group_final && rule->group.operation != KEY_OP_UNSET) {
959 if (rule->group.operation == KEY_OP_ASSIGN_FINAL)
960 udev->group_final = 1;
961 strlcpy(udev->group, key_val(rule, &rule->group), sizeof(udev->group));
962 apply_format(udev, udev->group, sizeof(udev->group), class_dev, sysfs_device);
963 dbg("applied group='%s' to '%s'", udev->group, udev->kernel_name);
966 /* collect symlinks */
967 if (!udev->symlink_final && rule->symlink.operation != KEY_OP_UNSET) {
968 char temp[PATH_SIZE];
972 if (rule->symlink.operation == KEY_OP_ASSIGN_FINAL)
973 udev->symlink_final = 1;
974 if (rule->symlink.operation == KEY_OP_ASSIGN || rule->symlink.operation == KEY_OP_ASSIGN_FINAL) {
975 info("reset symlink list");
976 name_list_cleanup(&udev->symlink_list);
978 strlcpy(temp, key_val(rule, &rule->symlink), sizeof(temp));
979 apply_format(udev, temp, sizeof(temp), class_dev, sysfs_device);
980 count = replace_untrusted_chars(temp);
982 info("%i untrusted character(s) replaced" , count);
983 dbg("rule applied, added symlink(s) '%s'", temp);
985 /* add multiple symlinks separated by spaces */
987 while (isspace(pos[0]))
989 next = strchr(pos, ' ');
992 info("add symlink '%s'", pos);
993 name_list_add(&udev->symlink_list, pos, 0);
994 while (isspace(next[1]))
997 next = strchr(pos, ' ');
999 if (pos[0] != '\0') {
1000 info("add symlink '%s'", pos);
1001 name_list_add(&udev->symlink_list, pos, 0);
1005 /* set name, later rules with name set will be ignored */
1006 if (rule->name.operation != KEY_OP_UNSET) {
1009 strlcpy(udev->name, key_val(rule, &rule->name), sizeof(udev->name));
1010 apply_format(udev, udev->name, sizeof(udev->name), class_dev, sysfs_device);
1011 count = replace_untrusted_chars(udev->name);
1013 info("%i untrusted character(s) replaced", count);
1015 info("rule applied, '%s' becomes '%s'", udev->kernel_name, udev->name);
1016 if (udev->type != DEV_NET)
1017 dbg("name, '%s' is going to have owner='%s', group='%s', mode=%#o partitions=%i",
1018 udev->name, udev->owner, udev->group, udev->mode, udev->partitions);
1021 if (!udev->run_final && rule->run.operation != KEY_OP_UNSET) {
1022 char program[PATH_SIZE];
1024 if (rule->run.operation == KEY_OP_ASSIGN_FINAL)
1025 udev->run_final = 1;
1026 if (rule->run.operation == KEY_OP_ASSIGN || rule->run.operation == KEY_OP_ASSIGN_FINAL) {
1027 info("reset run list");
1028 name_list_cleanup(&udev->run_list);
1030 strlcpy(program, key_val(rule, &rule->run), sizeof(program));
1031 apply_format(udev, program, sizeof(program), class_dev, sysfs_device);
1032 dbg("add run '%s'", program);
1033 name_list_add(&udev->run_list, program, 0);
1036 if (rule->last_rule) {
1037 dbg("last rule to be applied");
1041 if (rule->goto_label.operation != KEY_OP_UNSET) {
1042 dbg("moving forward to label '%s'", key_val(rule, &rule->goto_label));
1043 udev_rules_iter_label(rules, key_val(rule, &rule->goto_label));
1049 strlcpy(udev->name, udev->kernel_name, sizeof(udev->name));
1050 info("no node name set, will use kernel name '%s'", udev->name);
1053 if (udev->tmp_node[0] != '\0') {
1054 dbg("removing temporary device node");
1055 unlink_secure(udev->tmp_node);
1056 udev->tmp_node[0] = '\0';
1062 int udev_rules_get_run(struct udev_rules *rules, struct udevice *udev,
1063 struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_dev)
1065 struct udev_rule *rule;
1067 if (class_dev && !sysfs_dev)
1068 sysfs_dev = sysfs_get_classdev_device(class_dev);
1070 dbg("found devices device: path='%s', bus_id='%s', bus='%s'",
1071 sysfs_dev->path, sysfs_dev->bus_id, sysfs_dev->bus);
1072 strlcpy(udev->bus_id, sysfs_dev->bus_id, sizeof(udev->bus_id));
1075 dbg("udev->kernel_name='%s'", udev->kernel_name);
1077 /* look for a matching rule to apply */
1078 udev_rules_iter_init(rules);
1080 rule = udev_rules_iter_next(rules);
1084 dbg("process rule");
1085 if (rule->name.operation != KEY_OP_UNSET || rule->symlink.operation != KEY_OP_UNSET ||
1086 rule->mode_operation != KEY_OP_UNSET || rule->owner.operation != KEY_OP_UNSET || rule->group.operation != KEY_OP_UNSET) {
1087 dbg("skip rule that names a device");
1091 if (match_rule(udev, rule, class_dev, sysfs_dev) == 0) {
1092 if (rule->ignore_device) {
1093 info("rule applied, '%s' is ignored", udev->kernel_name);
1094 udev->ignore_device = 1;
1098 if (!udev->run_final && rule->run.operation != KEY_OP_UNSET) {
1099 char program[PATH_SIZE];
1101 if (rule->run.operation == KEY_OP_ASSIGN || rule->run.operation == KEY_OP_ASSIGN_FINAL) {
1102 info("reset run list");
1103 name_list_cleanup(&udev->run_list);
1105 strlcpy(program, key_val(rule, &rule->run), sizeof(program));
1106 apply_format(udev, program, sizeof(program), class_dev, sysfs_dev);
1107 dbg("add run '%s'", program);
1108 name_list_add(&udev->run_list, program, 0);
1109 if (rule->run.operation == KEY_OP_ASSIGN_FINAL)
1113 if (rule->last_rule) {
1114 dbg("last rule to be applied");
1118 if (rule->goto_label.operation != KEY_OP_UNSET) {
1119 dbg("moving forward to label '%s'", key_val(rule, &rule->goto_label));
1120 udev_rules_iter_label(rules, key_val(rule, &rule->goto_label));