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 static int match_name_and_get_number(const char *base, const char *devname)
276 baselen = strlen(base);
277 if (strncmp(base, devname, baselen) != 0)
279 if (devname[baselen] == '\0')
281 if (!isdigit(devname[baselen]))
283 num = strtoul(&devname[baselen], &endptr, 10);
284 if (endptr[0] != '\0')
289 /* finds the lowest positive device number such that <name>N isn't present in the udevdb
290 * if <name> doesn't exist, 0 is returned, N otherwise */
291 static int find_free_number(const char *base, const char *devpath)
293 char db_devpath[PATH_SIZE];
294 char filename[PATH_SIZE];
295 struct udevice udev_db;
298 /* check if the device already owns a matching name */
299 udev_init_device(&udev_db, NULL, NULL, NULL);
300 if (udev_db_get_device(&udev_db, devpath) == 0) {
301 struct name_entry *name_loop;
304 devnum = match_name_and_get_number(base, udev_db.name);
307 dbg("device '%s', already has the node '%s' with num %u, use it", devpath, base, num);
310 list_for_each_entry(name_loop, &udev_db.symlink_list, node) {
311 devnum = match_name_and_get_number(base, name_loop->name);
314 dbg("device '%s', already has a symlink '%s' with num %u, use it", devpath, base, num);
320 /* just search the database again and again until a free name is found */
321 strlcpy(filename, base, sizeof(filename));
323 dbg("look for existing node '%s'", filename);
324 if (udev_db_lookup_name(filename, db_devpath, sizeof(db_devpath)) != 0) {
325 dbg("free num=%d", num);
331 err("find_free_number aborted at num=%d", num);
335 snprintf(filename, sizeof(filename), "%s%d", base, num);
336 filename[sizeof(filename)-1] = '\0';
340 udev_cleanup_device(&udev_db);
344 static int find_sysfs_attribute(struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device,
345 const char *name, char *value, size_t len)
347 struct sysfs_class_device *class_dev_parent;
348 struct sysfs_attribute *tmpattr;
350 dbg("look for device attribute '%s'", name);
352 dbg("look for class attribute '%s/%s'", class_dev->path, name);
353 tmpattr = sysfs_get_classdev_attr(class_dev, name);
356 class_dev_parent = sysfs_get_classdev_parent(class_dev);
357 if (class_dev_parent) {
358 tmpattr = sysfs_get_classdev_attr(class_dev_parent, name);
364 dbg("look for devices attribute '%s/%s'", sysfs_device->path, name);
365 tmpattr = sysfs_get_device_attr(sysfs_device, name);
372 strlcpy(value, tmpattr->value, len);
373 remove_trailing_chars(value, '\n');
375 dbg("found attribute '%s'", tmpattr->path);
379 #define WAIT_LOOP_PER_SECOND 20
380 static int wait_for_sysfs(struct udevice *udev, const char *file, int timeout)
382 char filename[PATH_SIZE];
384 int loop = timeout * WAIT_LOOP_PER_SECOND;
386 snprintf(filename, sizeof(filename), "%s%s/%s", sysfs_path, udev->devpath, file);
387 filename[sizeof(filename)-1] = '\0';
388 dbg("wait %i sec for '%s'", timeout, filename);
391 if (stat(filename, &stats) == 0) {
392 info("file appeared after %i loops", (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
395 usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND);
397 info("waiting for '%s' failed", filename);
401 static void apply_format(struct udevice *udev, char *string, size_t maxsize,
402 struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device)
404 char temp[PATH_SIZE];
405 char temp2[PATH_SIZE];
406 char *head, *tail, *pos, *cpos, *attr, *rest;
410 unsigned int next_free_number;
411 struct sysfs_class_device *class_dev_parent;
429 static const struct subst_map {
432 enum subst_type type;
434 { .name = "devpath", .fmt = 'p', .type = SUBST_DEVPATH },
435 { .name = "id", .fmt = 'b', .type = SUBST_ID },
436 { .name = "number", .fmt = 'n', .type = SUBST_KERNEL_NUMBER },
437 { .name = "kernel", .fmt = 'k', .type = SUBST_KERNEL_NAME },
438 { .name = "major", .fmt = 'M', .type = SUBST_MAJOR },
439 { .name = "minor", .fmt = 'm', .type = SUBST_MINOR },
440 { .name = "result", .fmt = 'c', .type = SUBST_RESULT },
441 { .name = "sysfs", .fmt = 's', .type = SUBST_SYSFS },
442 { .name = "enum", .fmt = 'e', .type = SUBST_ENUM },
443 { .name = "parent", .fmt = 'P', .type = SUBST_PARENT },
444 { .name = "tempnode", .fmt = 'N', .type = SUBST_TEMP_NODE },
445 { .name = "root", .fmt = 'r', .type = SUBST_ROOT },
446 { .name = "modalias", .fmt = 'A', .type = SUBST_MODALIAS },
447 { .name = "env", .fmt = 'E', .type = SUBST_ENV },
450 enum subst_type type;
451 const struct subst_map *subst;
456 while (head[0] != '\0') {
457 if (head[0] == '$') {
458 /* substitute named variable */
461 if (head[1] == '$') {
462 strlcpy(temp, head+2, sizeof(temp));
463 strlcpy(head+1, temp, maxsize);
468 for (subst = map; subst->name; subst++) {
469 if (strncasecmp(&head[1], subst->name, strlen(subst->name)) == 0) {
471 tail = head + strlen(subst->name)+1;
472 dbg("will substitute format name '%s'", subst->name);
477 else if (head[0] == '%') {
478 /* substitute format char */
481 if (head[1] == '%') {
482 strlcpy(temp, head+2, sizeof(temp));
483 strlcpy(head+1, temp, maxsize);
489 len = get_format_len(&tail);
490 for (subst = map; subst->name; subst++) {
491 if (tail[0] == subst->fmt) {
494 dbg("will substitute format char '%c'", subst->fmt);
503 attr = get_format_attribute(&tail);
504 strlcpy(temp, tail, sizeof(temp));
505 dbg("format=%i, string='%s', tail='%s', class_dev=%p, sysfs_dev=%p",
506 type ,string, tail, class_dev, sysfs_device);
510 strlcat(string, udev->devpath, maxsize);
511 dbg("substitute devpath '%s'", udev->devpath);
514 strlcat(string, udev->bus_id, maxsize);
515 dbg("substitute bus_id '%s'", udev->bus_id);
517 case SUBST_KERNEL_NAME:
518 strlcat(string, udev->kernel_name, maxsize);
519 dbg("substitute kernel name '%s'", udev->kernel_name);
521 case SUBST_KERNEL_NUMBER:
522 strlcat(string, udev->kernel_number, maxsize);
523 dbg("substitute kernel number '%s'", udev->kernel_number);
526 sprintf(temp2, "%d", major(udev->devt));
527 strlcat(string, temp2, maxsize);
528 dbg("substitute major number '%s'", temp2);
531 sprintf(temp2, "%d", minor(udev->devt));
532 strlcat(string, temp2, maxsize);
533 dbg("substitute minor number '%s'", temp2);
536 if (udev->program_result[0] == '\0')
538 /* get part part of the result string */
541 i = strtoul(attr, &rest, 10);
543 dbg("request part #%d of result string", i);
544 cpos = udev->program_result;
546 while (cpos[0] != '\0' && !isspace(cpos[0]))
548 while (isspace(cpos[0]))
552 err("requested part of result string not found");
555 strlcpy(temp2, cpos, sizeof(temp2));
556 /* %{2+}c copies the whole string from the second part on */
557 if (rest[0] != '+') {
558 cpos = strchr(temp2, ' ');
562 strlcat(string, temp2, maxsize);
563 dbg("substitute part of result string '%s'", temp2);
565 strlcat(string, udev->program_result, maxsize);
566 dbg("substitute result string '%s'", udev->program_result);
571 dbg("missing attribute");
574 if (find_sysfs_attribute(class_dev, sysfs_device, attr, temp2, sizeof(temp2)) != 0) {
575 struct sysfs_device *parent_device;
577 dbg("sysfs attribute '%s' not found, walk up the physical devices", attr);
578 parent_device = sysfs_get_device_parent(sysfs_device);
579 while (parent_device) {
580 dbg("looking at '%s'", parent_device->path);
581 if (find_sysfs_attribute(NULL, parent_device, attr, temp2, sizeof(temp2)) == 0)
583 parent_device = sysfs_get_device_parent(parent_device);
588 /* strip trailing whitespace of sysfs value */
590 while (i > 0 && isspace(temp2[i-1]))
592 count = replace_untrusted_chars(temp2);
594 info("%i untrusted character(s) replaced" , count);
595 strlcat(string, temp2, maxsize);
596 dbg("substitute sysfs value '%s'", temp2);
599 next_free_number = find_free_number(string, udev->devpath);
600 if (next_free_number > 0) {
601 sprintf(temp2, "%d", next_free_number);
602 strlcat(string, temp2, maxsize);
608 class_dev_parent = sysfs_get_classdev_parent(class_dev);
609 if (class_dev_parent != NULL) {
610 struct udevice udev_parent;
612 dbg("found parent '%s', get the node name", class_dev_parent->path);
613 udev_init_device(&udev_parent, NULL, NULL, NULL);
614 /* lookup the name in the udev_db with the DEVPATH of the parent */
615 if (udev_db_get_device(&udev_parent, &class_dev_parent->path[strlen(sysfs_path)]) == 0) {
616 strlcat(string, udev_parent.name, maxsize);
617 dbg("substitute parent node name'%s'", udev_parent.name);
619 dbg("parent not found in database");
620 udev_cleanup_device(&udev_parent);
623 case SUBST_TEMP_NODE:
624 if (udev->tmp_node[0] == '\0') {
625 dbg("create temporary device node for callout");
626 snprintf(udev->tmp_node, sizeof(udev->tmp_node), "%s/.tmp-%u-%u",
627 udev_root, major(udev->devt), minor(udev->devt));
628 udev->tmp_node[sizeof(udev->tmp_node)-1] = '\0';
629 udev_make_node(udev, udev->tmp_node, udev->devt, 0600, 0, 0);
631 strlcat(string, udev->tmp_node, maxsize);
632 dbg("substitute temporary device node name '%s'", udev->tmp_node);
635 strlcat(string, udev_root, maxsize);
636 dbg("substitute udev_root '%s'", udev_root);
639 if (find_sysfs_attribute(NULL, sysfs_device, "modalias", temp2, sizeof(temp2)) != 0)
641 strlcat(string, temp2, maxsize);
642 dbg("substitute MODALIAS '%s'", temp2);
646 dbg("missing attribute");
651 dbg("env '%s' not avialable", attr);
654 dbg("substitute env '%s=%s'", attr, pos);
655 strlcat(string, pos, maxsize);
658 err("unknown substitution type=%i", type);
661 /* possibly truncate to format-char specified length */
664 dbg("truncate to %i chars, subtitution string becomes '%s'", len, head);
666 strlcat(string, temp, maxsize);
670 static char *key_val(struct udev_rule *rule, struct key *key)
672 return rule->buf + key->val_off;
675 static char *key_pair_name(struct udev_rule *rule, struct key_pair *pair)
677 return rule->buf + pair->key_name_off;
680 static int match_key(const char *key_name, struct udev_rule *rule, struct key *key, const char *val)
683 char value[PATH_SIZE];
687 if (key->operation == KEY_OP_UNSET)
690 strlcpy(value, rule->buf + key->val_off, sizeof(value));
693 dbg("key %s value='%s'", key_name, key_value);
695 pos = strchr(key_value, '|');
700 dbg("match %s '%s' <-> '%s'", key_name, key_value, val);
701 match = (strcmp_pattern(key_value, val) == 0);
702 if (match && (key->operation != KEY_OP_NOMATCH)) {
703 dbg("%s is true (matching value)", key_name);
706 if (!match && (key->operation == KEY_OP_NOMATCH)) {
707 dbg("%s is true (non-matching value)", key_name);
712 dbg("%s is false", key_name);
716 /* match a single rule against a given device and possibly its parent devices */
717 static int match_rule(struct udevice *udev, struct udev_rule *rule,
718 struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device)
720 struct sysfs_device *parent_device = sysfs_device;
723 if (match_key("ACTION", rule, &rule->action, udev->action))
726 if (match_key("KERNEL", rule, &rule->kernel_name, udev->kernel_name))
729 if (match_key("SUBSYSTEM", rule, &rule->subsystem, udev->subsystem))
732 if (match_key("DEVPATH", rule, &rule->devpath, udev->devpath))
735 if (rule->modalias.operation != KEY_OP_UNSET) {
736 char value[NAME_SIZE];
738 if (find_sysfs_attribute(NULL, sysfs_device, "modalias", value, sizeof(value)) != 0) {
739 dbg("MODALIAS value not found");
742 if (match_key("MODALIAS", rule, &rule->modalias, value))
746 for (i = 0; i < rule->env.count; i++) {
747 struct key_pair *pair = &rule->env.keys[i];
749 /* we only check for matches, assignments will be handled later */
750 if (pair->key.operation != KEY_OP_ASSIGN) {
751 const char *key_name = key_pair_name(rule, pair);
752 const char *value = getenv(key_name);
755 dbg("ENV{'%s'} is not set, treat as empty", key_name);
758 if (match_key("ENV", rule, &pair->key, value))
763 if (rule->wait_for_sysfs.operation != KEY_OP_UNSET) {
766 match = (wait_for_sysfs(udev, key_val(rule, &rule->wait_for_sysfs), 3) == 0);
767 if (match && (rule->wait_for_sysfs.operation != KEY_OP_NOMATCH)) {
768 dbg("WAIT_FOR_SYSFS is true (matching value)");
771 if (!match && (rule->wait_for_sysfs.operation == KEY_OP_NOMATCH)) {
772 dbg("WAIT_FOR_SYSFS is true, (non matching value)");
775 dbg("WAIT_FOR_SYSFS is false");
779 /* walk up the chain of physical devices and find a match */
781 /* check for matching driver */
782 if (rule->driver.operation != KEY_OP_UNSET) {
783 if (parent_device == NULL) {
784 dbg("device has no sysfs_device");
787 if (match_key("DRIVER", rule, &rule->driver, parent_device->driver_name))
791 /* check for matching bus value */
792 if (rule->bus.operation != KEY_OP_UNSET) {
793 if (parent_device == NULL) {
794 dbg("device has no sysfs_device");
797 if (match_key("BUS", rule, &rule->bus, parent_device->bus))
801 /* check for matching bus id */
802 if (rule->id.operation != KEY_OP_UNSET) {
803 if (parent_device == NULL) {
804 dbg("device has no sysfs_device");
807 if (match_key("ID", rule, &rule->id, parent_device->bus_id))
811 /* check for matching sysfs pairs */
812 if (rule->sysfs.count) {
813 dbg("check %i SYSFS keys", rule->sysfs.count);
814 for (i = 0; i < rule->sysfs.count; i++) {
815 struct key_pair *pair = &rule->sysfs.keys[i];
816 const char *key_name = key_pair_name(rule, pair);
817 const char *key_value = key_val(rule, &pair->key);
818 char value[VALUE_SIZE];
821 if (find_sysfs_attribute(class_dev, parent_device, key_name, value, sizeof(value)) != 0)
824 /* strip trailing whitespace of value, if not asked to match for it */
825 len = strlen(key_value);
826 if (len && !isspace(key_value[len-1])) {
828 while (len > 0 && isspace(value[len-1]))
830 dbg("removed %zi trailing whitespace chars from '%s'", strlen(value)-len, value);
833 if (match_key("SYSFS", rule, &pair->key, value))
836 dbg("all %i SYSFS keys matched", rule->sysfs.count);
839 /* found matching physical device */
842 dbg("try parent sysfs device");
843 parent_device = sysfs_get_device_parent(parent_device);
844 if (parent_device == NULL)
846 dbg("look at sysfs_device->path='%s'", parent_device->path);
847 dbg("look at sysfs_device->bus_id='%s'", parent_device->bus_id);
850 /* execute external program */
851 if (rule->program.operation != KEY_OP_UNSET) {
852 char program[PATH_SIZE];
853 char result[PATH_SIZE];
855 strlcpy(program, key_val(rule, &rule->program), sizeof(program));
856 apply_format(udev, program, sizeof(program), class_dev, sysfs_device);
857 if (run_program(program, udev->subsystem, result, sizeof(result), NULL, (udev_log_priority >= LOG_INFO)) != 0) {
858 dbg("PROGRAM is false");
859 udev->program_result[0] = '\0';
860 if (rule->program.operation != KEY_OP_NOMATCH)
865 dbg("PROGRAM matches");
866 remove_trailing_chars(result, '\n');
867 count = replace_untrusted_chars(result);
869 info("%i untrusted character(s) replaced" , count);
870 dbg("result is '%s'", result);
871 strlcpy(udev->program_result, result, sizeof(udev->program_result));
872 dbg("PROGRAM returned successful");
873 if (rule->program.operation == KEY_OP_NOMATCH)
876 dbg("PROGRAM key is true");
879 /* check for matching result of external program */
880 if (match_key("RESULT", rule, &rule->result, udev->program_result))
883 /* import variables returned from program or or file into environment */
884 if (rule->import.operation != KEY_OP_UNSET) {
885 char import[PATH_SIZE];
888 strlcpy(import, key_val(rule, &rule->import), sizeof(import));
889 apply_format(udev, import, sizeof(import), class_dev, sysfs_device);
890 dbg("check for IMPORT import='%s'", import);
891 if (rule->import_type == IMPORT_PROGRAM) {
892 rc = import_program_into_env(udev, import);
893 } else if (rule->import_type == IMPORT_FILE) {
894 dbg("import file import='%s'", import);
895 rc = import_file_into_env(udev, import);
896 } else if (rule->import_type == IMPORT_PARENT && class_dev) {
897 dbg("import parent import='%s'", import);
898 rc = import_parent_into_env(udev, class_dev, import);
901 dbg("IMPORT failed");
902 if (rule->import.operation != KEY_OP_NOMATCH)
905 dbg("IMPORT '%s' imported", key_val(rule, &rule->import));
906 dbg("IMPORT key is true");
909 /* rule matches, if we have ENV assignments export it */
910 for (i = 0; i < rule->env.count; i++) {
911 struct key_pair *pair = &rule->env.keys[i];
913 if (pair->key.operation == KEY_OP_ASSIGN) {
914 const char *key_name = key_pair_name(rule, pair);
915 const char *value = key_val(rule, &pair->key);
917 name_list_key_add(&udev->env_list, key_name, value);
918 setenv(key_name, value, 1);
919 dbg("export ENV '%s=%s'", key_name, value);
929 int udev_rules_get_name(struct udev_rules *rules, struct udevice *udev, struct sysfs_class_device *class_dev)
931 struct sysfs_class_device *class_dev_parent;
932 struct sysfs_device *sysfs_device = NULL;
933 struct udev_rule *rule;
936 dbg("class_dev->name='%s'", class_dev->name);
938 /* Figure out where the "device"-symlink is at. For char devices this will
939 * always be in the class_dev->path. On block devices, only the main block
940 * device will have the device symlink in it's path. All partition devices
941 * need to look at the symlink in its parent directory.
943 class_dev_parent = sysfs_get_classdev_parent(class_dev);
944 if (class_dev_parent != NULL) {
945 dbg("given class device has a parent, use this instead");
946 sysfs_device = sysfs_get_classdev_device(class_dev_parent);
948 sysfs_device = sysfs_get_classdev_device(class_dev);
952 dbg("found devices device: path='%s', bus_id='%s', bus='%s'",
953 sysfs_device->path, sysfs_device->bus_id, sysfs_device->bus);
954 strlcpy(udev->bus_id, sysfs_device->bus_id, sizeof(udev->bus_id));
957 dbg("udev->kernel_name='%s'", udev->kernel_name);
959 /* look for a matching rule to apply */
960 udev_rules_iter_init(rules);
962 rule = udev_rules_iter_next(rules);
966 if (name_set && rule->name.operation != KEY_OP_UNSET) {
967 dbg("node name already set, rule ignored");
972 if (match_rule(udev, rule, class_dev, sysfs_device) == 0) {
974 if (rule->ignore_device) {
975 info("rule applied, '%s' is ignored", udev->kernel_name);
976 udev->ignore_device = 1;
979 if (rule->ignore_remove) {
980 udev->ignore_remove = 1;
981 dbg("remove event should be ignored");
983 /* apply all_partitions option only at a main block device */
984 if (rule->partitions && udev->type == DEV_BLOCK && udev->kernel_number[0] == '\0') {
985 udev->partitions = rule->partitions;
986 dbg("creation of partition nodes requested");
989 /* apply permissions */
990 if (!udev->mode_final && rule->mode != 0000) {
991 if (rule->mode_operation == KEY_OP_ASSIGN_FINAL)
992 udev->mode_final = 1;
993 udev->mode = rule->mode;
994 dbg("applied mode=%#o to '%s'", rule->mode, udev->kernel_name);
996 if (!udev->owner_final && rule->owner.operation != KEY_OP_UNSET) {
997 if (rule->owner.operation == KEY_OP_ASSIGN_FINAL)
998 udev->owner_final = 1;
999 strlcpy(udev->owner, key_val(rule, &rule->owner), sizeof(udev->owner));
1000 apply_format(udev, udev->owner, sizeof(udev->owner), class_dev, sysfs_device);
1001 dbg("applied owner='%s' to '%s'", udev->owner, udev->kernel_name);
1003 if (!udev->group_final && rule->group.operation != KEY_OP_UNSET) {
1004 if (rule->group.operation == KEY_OP_ASSIGN_FINAL)
1005 udev->group_final = 1;
1006 strlcpy(udev->group, key_val(rule, &rule->group), sizeof(udev->group));
1007 apply_format(udev, udev->group, sizeof(udev->group), class_dev, sysfs_device);
1008 dbg("applied group='%s' to '%s'", udev->group, udev->kernel_name);
1011 /* collect symlinks */
1012 if (!udev->symlink_final && rule->symlink.operation != KEY_OP_UNSET) {
1013 char temp[PATH_SIZE];
1017 if (rule->symlink.operation == KEY_OP_ASSIGN_FINAL)
1018 udev->symlink_final = 1;
1019 if (rule->symlink.operation == KEY_OP_ASSIGN || rule->symlink.operation == KEY_OP_ASSIGN_FINAL) {
1020 info("reset symlink list");
1021 name_list_cleanup(&udev->symlink_list);
1023 strlcpy(temp, key_val(rule, &rule->symlink), sizeof(temp));
1024 apply_format(udev, temp, sizeof(temp), class_dev, sysfs_device);
1025 count = replace_untrusted_chars(temp);
1027 info("%i untrusted character(s) replaced" , count);
1028 dbg("rule applied, added symlink(s) '%s'", temp);
1030 /* add multiple symlinks separated by spaces */
1032 while (isspace(pos[0]))
1034 next = strchr(pos, ' ');
1037 info("add symlink '%s'", pos);
1038 name_list_add(&udev->symlink_list, pos, 0);
1039 while (isspace(next[1]))
1042 next = strchr(pos, ' ');
1044 if (pos[0] != '\0') {
1045 info("add symlink '%s'", pos);
1046 name_list_add(&udev->symlink_list, pos, 0);
1050 /* set name, later rules with name set will be ignored */
1051 if (rule->name.operation != KEY_OP_UNSET) {
1054 strlcpy(udev->name, key_val(rule, &rule->name), sizeof(udev->name));
1055 apply_format(udev, udev->name, sizeof(udev->name), class_dev, sysfs_device);
1056 count = replace_untrusted_chars(udev->name);
1058 info("%i untrusted character(s) replaced", count);
1060 info("rule applied, '%s' becomes '%s'", udev->kernel_name, udev->name);
1061 if (udev->type != DEV_NET)
1062 dbg("name, '%s' is going to have owner='%s', group='%s', mode=%#o partitions=%i",
1063 udev->name, udev->owner, udev->group, udev->mode, udev->partitions);
1066 if (!udev->run_final && rule->run.operation != KEY_OP_UNSET) {
1067 char program[PATH_SIZE];
1069 if (rule->run.operation == KEY_OP_ASSIGN_FINAL)
1070 udev->run_final = 1;
1071 if (rule->run.operation == KEY_OP_ASSIGN || rule->run.operation == KEY_OP_ASSIGN_FINAL) {
1072 info("reset run list");
1073 name_list_cleanup(&udev->run_list);
1075 strlcpy(program, key_val(rule, &rule->run), sizeof(program));
1076 apply_format(udev, program, sizeof(program), class_dev, sysfs_device);
1077 dbg("add run '%s'", program);
1078 name_list_add(&udev->run_list, program, 0);
1081 if (rule->last_rule) {
1082 dbg("last rule to be applied");
1086 if (rule->goto_label.operation != KEY_OP_UNSET) {
1087 dbg("moving forward to label '%s'", key_val(rule, &rule->goto_label));
1088 udev_rules_iter_label(rules, key_val(rule, &rule->goto_label));
1094 strlcpy(udev->name, udev->kernel_name, sizeof(udev->name));
1095 info("no node name set, will use kernel name '%s'", udev->name);
1098 if (udev->tmp_node[0] != '\0') {
1099 dbg("removing temporary device node");
1100 unlink_secure(udev->tmp_node);
1101 udev->tmp_node[0] = '\0';
1107 int udev_rules_get_run(struct udev_rules *rules, struct udevice *udev,
1108 struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_dev)
1110 struct udev_rule *rule;
1112 if (class_dev && !sysfs_dev)
1113 sysfs_dev = sysfs_get_classdev_device(class_dev);
1115 dbg("found devices device: path='%s', bus_id='%s', bus='%s'",
1116 sysfs_dev->path, sysfs_dev->bus_id, sysfs_dev->bus);
1117 strlcpy(udev->bus_id, sysfs_dev->bus_id, sizeof(udev->bus_id));
1120 dbg("udev->kernel_name='%s'", udev->kernel_name);
1122 /* look for a matching rule to apply */
1123 udev_rules_iter_init(rules);
1125 rule = udev_rules_iter_next(rules);
1129 dbg("process rule");
1130 if (rule->name.operation != KEY_OP_UNSET || rule->symlink.operation != KEY_OP_UNSET ||
1131 rule->mode_operation != KEY_OP_UNSET || rule->owner.operation != KEY_OP_UNSET || rule->group.operation != KEY_OP_UNSET) {
1132 dbg("skip rule that names a device");
1136 if (match_rule(udev, rule, class_dev, sysfs_dev) == 0) {
1137 if (rule->ignore_device) {
1138 info("rule applied, '%s' is ignored", udev->kernel_name);
1139 udev->ignore_device = 1;
1143 if (!udev->run_final && rule->run.operation != KEY_OP_UNSET) {
1144 char program[PATH_SIZE];
1146 if (rule->run.operation == KEY_OP_ASSIGN || rule->run.operation == KEY_OP_ASSIGN_FINAL) {
1147 info("reset run list");
1148 name_list_cleanup(&udev->run_list);
1150 strlcpy(program, key_val(rule, &rule->run), sizeof(program));
1151 apply_format(udev, program, sizeof(program), class_dev, sysfs_dev);
1152 dbg("add run '%s'", program);
1153 name_list_add(&udev->run_list, program, 0);
1154 if (rule->run.operation == KEY_OP_ASSIGN_FINAL)
1158 if (rule->last_rule) {
1159 dbg("last rule to be applied");
1163 if (rule->goto_label.operation != KEY_OP_UNSET) {
1164 dbg("moving forward to label '%s'", key_val(rule, &rule->goto_label));
1165 udev_rules_iter_label(rules, key_val(rule, &rule->goto_label));