#!/bin/bash
# This script is invoked at the closure of syslog socket during reboot
# This will stop journal services, unmount /var/log and delete loop device 
# associated to /host to ensure proper unmount of /host

journal_stop() {
    systemctl stop systemd-journald.service
    systemctl stop systemd-journald.socket
    systemctl stop systemd-journald-audit.socket
    systemctl stop systemd-journald-dev-log.socket
}

delete_loop_device() {
    umount /var/log
    if [[ $? -ne 0 ]]
    then
        exit 0
    fi
    losetup -d /dev/loop1
}

case "$1" in
    journal_stop|delete_loop_device)
        $1
        ;;
    *)
        echo "Usage: $0 {journal_stop|delete_loop_device}" >&2
        exit 1
        ;;
esac