add uci led support

- /etc/config/system can hold led info which is applied at boot
- adds /sbin/led.sh to set/clear leds via a name defined in /etc/config/system



git-svn-id: svn://svn.openwrt.org/openwrt/trunk@12104 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/base-files/files/sbin/led.sh

@@ -0,0 +1,25 @@
+#!/bin/sh
+# (C) 2008 openwrt.org
+
+. /etc/functions.sh
+ACTION=$1
+NAME=$2
+do_led() {
+	local name
+	local sysfs
+	config_get name $1 name
+	config_get sysfs $1 sysfs
+	[ "$name" == "$NAME" -a -e "/sys/class/leds/${sysfs}" ] && {
+		[ "$ACTION" == "set" ] &&
+			echo 1 >/sys/class/leds/${sysfs}/brightness \
+			|| echo 0 >/sys/class/leds/${sysfs}/brightness
+		exit 0
+	}
+}
+
+[ "$1" == "clear" -o "$1" == "set" ] &&
+	[ -n "$2" ] &&{
+		config_load system
+		config_foreach do_led
+		exit 1
+	}