Added a color temparature script

glue/src/display-temperature

@@ -0,0 +1,61 @@
+#!/bin/sh
+
+name=`basename "$0"`
+
+isInstalled() {
+	type "$1" > /dev/null
+}
+
+mustHaveInstalled() {
+	if ! isInstalled "$1"; then
+		echo "$name: $1 is not installed" >&2
+		exit 1
+	fi
+}
+
+usage() {
+	echo "Usage: $name day | night | daemon" >&2
+	exit 2
+}
+
+dayTemp=6500
+nightTemp=4000
+sunset=17
+sunrise=7
+
+if   isInstalled xsct
+then SCT=xsct
+elif isInstalled sct
+then SCT=sct
+fi
+
+case "$1" in
+"day" | "night" | "daemon")
+	mode="$1"
+	shift 1
+	;;
+*)
+	usage
+	;;
+esac
+
+[ "$#" -gt 0 ] && usage
+
+case "$mode" in
+"day")
+	$SCT "$dayTemp"
+	;;
+"night")
+	$SCT "$nightTemp"
+	;;
+"daemon")
+	while
+		hour=`date +%H`
+		if [ "$hour" -gt "$sunset" ] || [ "$hour" -lt "$sunrise" ]
+		then temp="$nightTemp"
+		else temp="$dayTemp"
+		fi
+		$SCT "$temp"
+	do sleep 4; done
+	;;
+esac