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base-files: maintain LED config state

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Record the state of any hardware LED configured through UCI and use that
information to revert the state when applying updated settings while
maintaining default behaviour of system LEDs.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>
This commit is contained in:
Jo-Philipp Wich 2016-06-08 10:14:27 +02:00
parent 98d418e05f
commit 35b33f0413
1 changed files with 17 additions and 5 deletions
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22
package/base-files/files/etc/init.d/led
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@ -37,6 +37,12 @@ load_led() {
[ -e /sys/class/leds/${sysfs}/brightness ] && {
echo "setting up led ${name}"
printf "%s %s %d\n" \
"$sysfs" \
"$(sed -ne 's/^.*\[\(.*\)\].*$/\1/p' /sys/class/leds/${sysfs}/trigger)" \
"$(cat /sys/class/leds/${sysfs}/brightness)" \
>> /var/run/led.state
[ "$default" = 0 ] &&
echo 0 >/sys/class/leds/${sysfs}/brightness
@ -103,11 +109,17 @@ load_led() {
start() {
[ -e /sys/class/leds/ ] && {
local led
for led in /sys/class/leds/*; do
[ -e "$led/trigger" ] && echo "none" > "$led/trigger"
[ -e "$led/brightness" ] && echo "0" > "$led/brightness"
done
[ -s /var/run/led.state ] && {
local led trigger brightness
while read led trigger brightness; do
[ -e "/sys/class/leds/$led/trigger" ] && \
echo "$trigger" > "/sys/class/leds/$led/trigger"
[ -e "/sys/class/leds/$led/brightness" ] && \
echo "$brightness" > "/sys/class/leds/$led/brightness"
done < /var/run/led.state
rm /var/run/led.state
}
config_load system
config_foreach load_led led