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introduce ATTR{file}="value" to set sysfs attributes

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This commit is contained in:
Kay Sievers
2006-08-20 18:16:27 +02:00
parent 38895e573c
commit d0c8cb7d9c
2 changed files with 37 additions and 25 deletions
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udev_rules.c
+36 -14
View File
@@ -644,17 +644,16 @@ static int match_rule(struct udevice *udev, struct udev_rule *rule)
int found;
found = (wait_for_sysfs(udev, key_val(rule, &rule->wait_for_sysfs), 3) == 0);
if (!found && (rule->wait_for_sysfs.operation != KEY_OP_NOMATCH)) {
dbg("WAIT_FOR_SYSFS failed");
if (!found && (rule->wait_for_sysfs.operation != KEY_OP_NOMATCH))
goto nomatch;
}
}
/* check for matching sysfs attrubute pairs */
if (rule->attr.count) {
dbg("check %i ATTR keys", rule->attr.count);
for (i = 0; i < rule->attr.count; i++) {
struct key_pair *pair = &rule->attr.keys[i];
/* check for matching sysfs attribute pairs */
for (i = 0; i < rule->attr.count; i++) {
struct key_pair *pair = &rule->attr.keys[i];
if (pair->key.operation == KEY_OP_MATCH ||
pair->key.operation == KEY_OP_NOMATCH) {
const char *key_name = key_pair_name(rule, pair);
const char *key_value = key_val(rule, &pair->key);
const char *value;
@@ -678,7 +677,6 @@ static int match_rule(struct udevice *udev, struct udev_rule *rule)
if (match_key("ATTR", rule, &pair->key, val))
goto nomatch;
}
dbg("all %i ATTR keys matched", rule->attr.count);
}
/* walk up the chain of parent devices and find a match */
@@ -697,10 +695,11 @@ static int match_rule(struct udevice *udev, struct udev_rule *rule)
goto try_parent;
/* check for matching sysfs attrubute pairs */
if (rule->attrs.count) {
dbg("check %i ATTRS keys", rule->attrs.count);
for (i = 0; i < rule->attrs.count; i++) {
struct key_pair *pair = &rule->attrs.keys[i];
for (i = 0; i < rule->attrs.count; i++) {
struct key_pair *pair = &rule->attrs.keys[i];
if (pair->key.operation == KEY_OP_MATCH ||
pair->key.operation == KEY_OP_NOMATCH) {
const char *key_name = key_pair_name(rule, pair);
const char *key_value = key_val(rule, &pair->key);
const char *value;
@@ -726,7 +725,6 @@ static int match_rule(struct udevice *udev, struct udev_rule *rule)
if (match_key("ATTRS", rule, &pair->key, val))
goto try_parent;
}
dbg("all %i ATTRS keys matched", rule->attrs.count);
}
/* found matching device */
@@ -817,6 +815,30 @@ try_parent:
}
}
/* if we have ATTR assignements write value to sysfs file */
for (i = 0; i < rule->attr.count; i++) {
struct key_pair *pair = &rule->attr.keys[i];
if (pair->key.operation == KEY_OP_ASSIGN) {
const char *key_name = key_pair_name(rule, pair);
const char *key_value = key_val(rule, &pair->key);
char attr[PATH_SIZE];
FILE *f;
strlcpy(attr, sysfs_path, sizeof(attr));
strlcat(attr, udev->dev->devpath, sizeof(attr));
strlcat(attr, "/", sizeof(attr));
strlcat(attr, key_name, sizeof(attr));
dbg("write '%s' to '%s'", key_value, attr);
f = fopen(attr, "w");
if (f != NULL) {
if (fprintf(f, "%s\n", key_value) <= 0)
err("error writing ATTR{%s}: %s", attr, strerror(errno));
fclose(f);
} else
err("error opening ATTR{%s} for writing: %s", attr, strerror(errno));
}
}
return 0;
nomatch:
udev_rules_parse.c
+1 -11
View File
@@ -219,7 +219,7 @@ static int add_rule_key_pair(struct udev_rule *rule, struct key_pairs *pairs,
size_t key_len = strnlen(key, PATH_SIZE);
if (pairs->count >= PAIRS_MAX) {
err("skip, too many keys in a single rule");
err("skip, too many keys of the same type in a single rule");
return -1;
}
@@ -322,11 +322,6 @@ static int add_to_rules(struct udev_rules *rules, char *line, const char *filena
}
if (strncasecmp(key, "ATTR", sizeof("ATTR")-1) == 0) {
if (operation != KEY_OP_MATCH &&
operation != KEY_OP_NOMATCH) {
err("invalid ATTR operation");
goto invalid;
}
attr = get_key_attribute(key + sizeof("ATTR")-1);
if (attr == NULL) {
err("error parsing ATTR attribute");
@@ -375,11 +370,6 @@ static int add_to_rules(struct udev_rules *rules, char *line, const char *filena
if (strncasecmp(key, "ATTRS", sizeof("ATTRS")-1) == 0 ||
strncasecmp(key, "SYSFS", sizeof("SYSFS")-1) == 0) {
if (operation != KEY_OP_MATCH &&
operation != KEY_OP_NOMATCH) {
err("invalid ATTRSS operation");
goto invalid;
}
attr = get_key_attribute(key + sizeof("ATTRS")-1);
if (attr == NULL) {
err("error parsing ATTRS attribute");