sonic-buildimage/device/nokia/x86_64-nokia_ixr7250e_36x400g-r0/platform_reboot

#!/bin/bash

update_reboot_cause_for_supervisor_reboot()
{
    DEVICE_MGR_REBOOT_FILE=/tmp/device_mgr_reboot
    REBOOT_CAUSE_FILE=/host/reboot-cause/reboot-cause.txt
    TMP_REBOOT_CAUSE_FILE=/tmp/tmp-reboot-cause.txt
    if [ -f  $DEVICE_MGR_REBOOT_FILE ]; then
        if [ -f $REBOOT_CAUSE_FILE ]; then
            t1=`sudo grep "User: ," $REBOOT_CAUSE_FILE`
            if [ ! -z "$t1" ]; then
                echo $t1 | sed 's/reboot/reboot from Supervisor/g' | sed 's/User: /User: admin/g' > $TMP_REBOOT_CAUSE_FILE
                cp $TMP_REBOOT_CAUSE_FILE $REBOOT_CAUSE_FILE
            fi
        fi
    fi
}

# update the reboot_cuase file when reboot is trigger by device-mgr
update_reboot_cause_for_supervisor_reboot

systemctl stop nokia-watchdog.service
sleep 2
echo "w" > /dev/watchdog
kick_date=`date -u`
echo "last watchdog kick $kick_date" > /var/log/nokia-watchdog-last.log
rm -f /sys/firmware/efi/efivars/dump-*
touch /etc/opt/srlinux/devmgr_reboot_cause.done
rm -f /etc/opt/srlinux/reboot-cause.txt
sync
/sbin/reboot