#!/bin/bash

# Markers for the template processor
# DEFAULT_START
# DEFAULT_STOP
#
# ALSO=mars-@escvar{res}-trigger.path
# ALSO=mars-@escvar{res}-trigger.service

op="$1"

# Ensure that pure trigger does not change anything.

mars_dev=/dev/mars/@{res}
mnt=/mnt/test/@{res}

case "$op" in
start)
    # Assumption: start and vmstart seem to be idempotent already
    if ! [[ -b $mars_dev ]]; then
	echo "ignoring, $mars_dev is not present" 
	exit 0
    fi
    if mountpoint $mnt; then
	echo "ignoring, $mnt is already mounted" 
	exit 0
    fi
    mkdir -p $mnt
    mount $mars_dev $mnt
    mountpoint $mnt
    rc=$?
    # cleanup any old flags
    rm -f $mnt/*.flag
    # start load
    if (( !rc )); then
	/etc/marsadm/systemd-templates/SYSTEMD-load-occupy.sh $mnt
    fi
    exit $rc
    ;;

stop)
    if ! mountpoint $mnt; then
	# Idempotence
	exit 0
    fi

    /etc/marsadm/systemd-templates/SYSTEMD-load-stop.sh $mnt

    # for additional safety
    sleep 1

    # umount, idempotent for increased robustness
    if mountpoint $mnt; then
	umount $mnt
    fi

    # status
    if mountpoint $mnt; then
	exit 1
    fi
    exit 0
    ;;

*)
    # Ignore all other ops, like enable / disable / etc
    echo "Ignore '$op'"
    exit 0
esac

exit 0