[openwrt/openwrt] base-files: don't wipe LED state when adding a single LED

[LEDE Commits]

dangole pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/dae6a871de3df0adca5b7f29a32c8c0642a9415e

commit dae6a871de3df0adca5b7f29a32c8c0642a9415e
Author: Daniel Golle <daniel at makrotopia.org>
AuthorDate: Sat Oct 5 18:20:35 2024 +0100

    base-files: don't wipe LED state when adding a single LED
    
    Only replace LED state of a single LED instead of removing the entire
    /var/run/led.state file.
    
    Fixes: 511e8f84d0 ("base-files: configure LED when added")
    Signed-off-by: Daniel Golle <daniel at makrotopia.org>
---
 package/base-files/files/etc/init.d/led | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/package/base-files/files/etc/init.d/led b/package/base-files/files/etc/init.d/led
index 5130ac7d41..7f05254c2b 100755
--- a/package/base-files/files/etc/init.d/led
+++ b/package/base-files/files/etc/init.d/led
@@ -184,7 +184,12 @@ start() {
 					echo "$color" | sed 's/:/\ /g' > \
 						"/sys/class/leds/$led/multi_intensity"
 			done < /var/run/led.state
-			rm /var/run/led.state
+			if [ "$1" ]; then
+				grep -v "^$1 " /var/run/led.state > /var/run/led.state.new
+				mv /var/run/led.state.new /var/run/led.state
+			else
+				rm /var/run/led.state
+			fi
 		}
 
 		config_load system