mirror of
https://github.com/systemd/systemd-stable.git
synced 2024-12-22 13:33:56 +03:00
add "[$SUBSYSTEM/$KERNEL]<attribute>" lookup
This commit is contained in:
parent
953249a3a0
commit
4ad47b2de6
@ -1559,6 +1559,15 @@ EOF
|
||||
# 012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789
|
||||
KERNEL="sda1", NAME=="no"
|
||||
KERNEL=="sda1", NAME="yes"
|
||||
EOF
|
||||
},
|
||||
{
|
||||
desc => "magic subsys/kernel lookup",
|
||||
subsys => "block",
|
||||
devpath => "/block/sda",
|
||||
exp_name => "00:e0:00:fb:04:e1",
|
||||
rules => <<EOF
|
||||
KERNEL=="sda", NAME="\$attr{[net/eth0]address}"
|
||||
EOF
|
||||
},
|
||||
);
|
||||
|
77
udev_rules.c
77
udev_rules.c
@ -267,10 +267,48 @@ static int wait_for_sysfs(struct udevice *udev, const char *file, int timeout)
|
||||
info("wait for '%s' for %i mseconds", filepath, 1000 / WAIT_LOOP_PER_SECOND);
|
||||
usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND);
|
||||
}
|
||||
err("waiting for '%s' failed", filepath);
|
||||
info("waiting for '%s' failed", filepath);
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* handle "[$SUBSYSTEM/$KERNEL]<attribute>" lookup */
|
||||
static int attr_get_by_subsys_id(const char *attrstr, char *devpath, size_t len, char **attr)
|
||||
{
|
||||
char subsys[NAME_SIZE];
|
||||
char *attrib;
|
||||
char *id;
|
||||
int found = 0;
|
||||
|
||||
if (attrstr[0] != '[')
|
||||
goto out;
|
||||
|
||||
strlcpy(subsys, &attrstr[1], sizeof(subsys));
|
||||
|
||||
attrib = strchr(subsys, ']');
|
||||
if (attrib == NULL)
|
||||
goto out;
|
||||
attrib[0] = '\0';
|
||||
attrib = &attrib[1];
|
||||
|
||||
id = strchr(subsys, '/');
|
||||
if (id == NULL)
|
||||
goto out;
|
||||
id[0] = '\0';
|
||||
id = &id[1];
|
||||
|
||||
if (sysfs_lookup_devpath_by_subsys_id(devpath, len, subsys, id)) {
|
||||
if (attr != NULL) {
|
||||
if (attrib[0] != '\0')
|
||||
*attr = attrib;
|
||||
else
|
||||
*attr = NULL;
|
||||
}
|
||||
found = 1;
|
||||
}
|
||||
out:
|
||||
return found;
|
||||
}
|
||||
|
||||
void udev_rules_apply_format(struct udevice *udev, char *string, size_t maxsize)
|
||||
{
|
||||
char temp[PATH_SIZE];
|
||||
@ -443,11 +481,20 @@ found:
|
||||
if (attr == NULL)
|
||||
err("missing file parameter for attr");
|
||||
else {
|
||||
char devpath[PATH_SIZE];
|
||||
char *attrib;
|
||||
const char *value = NULL;
|
||||
size_t size;
|
||||
|
||||
/* first try the current device, other matches may have selected */
|
||||
if (udev->dev_parent != NULL && udev->dev_parent != udev->dev)
|
||||
if (attr_get_by_subsys_id(attr, devpath, sizeof(devpath), &attrib)) {
|
||||
if (attrib != NULL)
|
||||
value = sysfs_attr_get_value(devpath, attrib);
|
||||
else
|
||||
break;
|
||||
}
|
||||
|
||||
/* try the current device, other matches may have selected */
|
||||
if (value == NULL && udev->dev_parent != NULL && udev->dev_parent != udev->dev)
|
||||
value = sysfs_attr_get_value(udev->dev_parent->devpath, attr);
|
||||
|
||||
/* look at all devices along the chain of parents */
|
||||
@ -643,12 +690,23 @@ static int match_rule(struct udevice *udev, struct udev_rule *rule)
|
||||
|
||||
if (rule->test.operation != KEY_OP_UNSET) {
|
||||
char filename[PATH_SIZE];
|
||||
char devpath[PATH_SIZE];
|
||||
char *attr;
|
||||
struct stat statbuf;
|
||||
int match;
|
||||
|
||||
strlcpy(filename, key_val(rule, &rule->test), sizeof(filename));
|
||||
udev_rules_apply_format(udev, filename, sizeof(filename));
|
||||
|
||||
if (attr_get_by_subsys_id(filename, devpath, sizeof(devpath), &attr)) {
|
||||
strlcpy(filename, sysfs_path, sizeof(filename));
|
||||
strlcat(filename, devpath, sizeof(filename));
|
||||
if (attr != NULL) {
|
||||
strlcat(filename, "/", sizeof(filename));
|
||||
strlcat(filename, attr, sizeof(filename));
|
||||
}
|
||||
}
|
||||
|
||||
match = (stat(filename, &statbuf) == 0);
|
||||
info("'%s' %s", filename, match ? "exists" : "does not exist");
|
||||
if (match && rule->test_mode_mask > 0) {
|
||||
@ -680,11 +738,20 @@ static int match_rule(struct udevice *udev, struct udev_rule *rule)
|
||||
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;
|
||||
char devpath[PATH_SIZE];
|
||||
char *attrib;
|
||||
const char *value = NULL;
|
||||
char val[VALUE_SIZE];
|
||||
size_t len;
|
||||
|
||||
value = sysfs_attr_get_value(udev->dev->devpath, key_name);
|
||||
if (attr_get_by_subsys_id(key_name, devpath, sizeof(devpath), &attrib)) {
|
||||
if (attrib != NULL)
|
||||
value = sysfs_attr_get_value(devpath, attrib);
|
||||
else
|
||||
goto nomatch;
|
||||
}
|
||||
if (value == NULL)
|
||||
value = sysfs_attr_get_value(udev->dev->devpath, key_name);
|
||||
if (value == NULL)
|
||||
goto nomatch;
|
||||
strlcpy(val, value, sizeof(val));
|
||||
|
Loading…
Reference in New Issue
Block a user