formatting, clean up

general/overlay/usr/sbin/sysupgrade

@@ -66,7 +66,6 @@ do_update_rootfs() {
 	unset x
 }
 
-
 do_wipe_overlay() {
 	echo_c 33 "\nOverlayFS"
 	echo "Erase overlay partition"
@@ -108,11 +107,11 @@ free_resources() {
 		done
 		echo ". OK"
 	done
-	sync; echo 3 > /proc/sys/vm/drop_caches
+	sync; echo 3 >/proc/sys/vm/drop_caches
 }
 
 self_update() {
-	if echo "${args}" | grep "rootfs" || echo  "${args}" | grep "kernel" || echo "${args}" | grep -- "-n" > /dev/null 2>&1; then
+	if echo "${args}" | grep "rootfs" || echo "${args}" | grep "kernel" || echo "${args}" | grep -- "-n" >/dev/null 2>&1; then
 		echo -e "\nOffline upgrade or Overlay clean, skip sysupgrade version check."
 	else
 		echo -e "\nOnline upgrade, checking sysupgrade version..."
@@ -172,7 +171,7 @@ print_sysinfo() {
 print_usage() {
 	echo "
 Usage: $0 [options]
-
+Where:
   -k                  update kernel from online repository
   -r                  update rootfs from online repository
       --url=[URL]	    custom URL to update from (.tgz format)
@@ -223,12 +222,12 @@ for i in "$@"; do
 			skip_ver=1
 			shift
 			;;
-	-h|--help)
+		-h | --help)
 			print_sysinfo
 			print_usage
 			exit 0
 			;;
-	-k )
+		-k)
 			update_kernel=1
 			remote_update=1
 			shift
@@ -238,7 +237,7 @@ for i in "$@"; do
 			kernel_file="${i#*=}"
 			shift
 			;;
-	-n|--wipe_overlay)
+		-n | --wipe_overlay)
 			clear_overlay=1
 			shift
 			;;
@@ -256,13 +255,13 @@ for i in "$@"; do
 			url="${i#*=}"
 			shift
 			;;
-	-x|--no_reboot)
+		-x | --no_reboot)
 			skip_reboot=1
 			shift
 			;;
 		*)
 			print_sysinfo
-		echo_c 97 "\nUnknown option: $1"
+			echo_c 37 "\nUnknown option: $1"
 			print_usage
 			exit 1
 			;;
@@ -280,6 +279,7 @@ exit 0
 self_update
 create_lock
 free_resources
+
 [ "$remote_update" -eq 1 ] && download_firmware
 [ "$update_kernel" -eq 1 ] && do_update_kernel "$kernel_file"
 [ "$update_rootfs" -eq 1 ] && do_update_rootfs "$rootfs_file"