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#!/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 "Make sure you aren't still in the mounted device."
echo -n "device (e.g. sdc2): "
read dev

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

    echo
    echo -n "next device: "
    read dev
done