upadte temp handling

@@ -26,7 +26,7 @@ function setroot() {
 function background() {
 	local SED="/bin/sed"
 	local XRANDR="/usr/bin/xrandr"
-	local TEMPFILE="/bin/tempfile"
+	local TEMPFILE="/usr/bin/mktemp"
 	local IDENTIFY="/usr/bin/identify"
 	local CONVERT="/usr/bin/convert"
 	local ECHO="/bin/echo"
@@ -92,7 +92,7 @@ function background() {
 		cmd="${cmd} ${img} -geometry ${image_geom}+${ofs_x}+${ofs_y} -composite"
 	done
 
-	img=`${TEMPFILE} -s '.jpg'`
+	img=`${TEMPFILE} --suffix '.jpg'`
 	eval "${CONVERT} ${cmd} ${img}"
 	setroot "${MYDISP}" "${img}"
 	rm ${img}