#!/usr/bin/env sh

# Description: Toggle mount status of a device using pmount
#              If the device is not mounted, it will be mounted.
#              If the device is mounted, it will be unmounted and powered down.
#
# Shell: POSIX compliant
# Author: Arun Prakash Jana

lsblk
echo
echo -n "device (e.g. sdc2): "
read dev

if [ -z "$dev" ]; then
    exit 1
fi

echo

if grep -qs "$dev " /proc/mounts; then
    sync
    pumount "$dev"
    if [ "$?" -eq "0" ]; then
        udisksctl power-off -b /dev/"$dev"
        echo $dev ejected.
    fi
else
    pmount "$dev"
    echo "$dev" mounted to "$(lsblk -n /dev/"$dev" | rev | cut -d' ' -f1 | rev)".
fi

read dummy