dualboot: update-firmware: add '--no-reboot' option to avoid the reboot of the system

This is required for the firmware update using Digi Remote Manager. The reboot
is commanded by the server, it that does not happen the update process is not
ended for DRM.

https://onedigi.atlassian.net/browse/DEL-8399

Signed-off-by: Tatiana Leon <Tatiana.Leon@digi.com>

meta-digi-dey/recipes-digi/dualboot/dualboot/update-firmware

@@ -24,6 +24,7 @@ SCRIPTNAME="$(basename "$(readlink -f "${0}")")"
 VERBOSE=""
 PUBLIC_KEY="/etc/ssl/certs/key.pub"
 ACTIVE_SYSTEM="$(fw_printenv -n active_system 2>/dev/null)"
+REBOOT=1
 
 ## Local functions
 usage() {
@@ -32,6 +33,7 @@ usage() {
 Usage: ${SCRIPTNAME} [OPTIONS] </your-path/your-filename>.swu
 
   -a          --active                   Show currently active system
+              --no-reboot                Do not reboot after update
   -v          --verbose                  Enable verbosity
   -h          --help                     Print help and exit
 
@@ -46,10 +48,21 @@ show_active_system() {
 	fi
 }
 
+reboot_system() {
+	if [ ${REBOOT} -eq 1 ]; then
+		echo "Firmware update finished. Rebooting the system."
+		reboot -f
+	else
+		echo "Firmware update finished. Reboot the system to use the new version."
+	fi
+}
+
 while :; do
 	case $1 in
 		-a|--active) show_active_system;exit
 		;;
+		--no-reboot) REBOOT=0
+		;;
 		-v|--verbose) VERBOSE="-v"
 		;;
 		-h|--help) usage;exit
@@ -98,7 +111,7 @@ if [ -z "${NANDROOTFS}" ]; then
 	done
 
 	if [ -z "${MMC_PART}" ] || [ -z "${PART_UUID}" ]; then
-		echo "[ERROR] detecting partitions to update."
+		echo "[ERROR] Detecting partitions to update."
 		exit
 	fi
 
@@ -113,8 +126,7 @@ if [ -z "${NANDROOTFS}" ]; then
 		fw_setenv mmcpart "${MMC_PART}"
 		fw_setenv active_system ${KERNELBOOT}
 		fw_setenv bootcount 0
-		echo "Firmware update finished; Rebooting system."
-		reboot -f
+		reboot_system
 	else
 		echo "[ERROR] $? There was an error performing the update"
 	fi
@@ -149,8 +161,7 @@ else
 		fw_setenv rootfsvol ${ROOTFS}
 		fw_setenv active_system ${KERNELBOOT}
 		fw_setenv bootcount 0
-		echo "Firmware update finished; Rebooting system."
-		reboot -f
+		reboot_system
 	else
 		echo "[ERROR] $? There was an error performing the update"
 	fi