#!/bin/sh

#Company:   PowerCraft Technology
#Author:    Copyright Jelle de Jong <jelledejong@powercraft.nl>
#Note:      Please send me an email if you enhanced this script
#System:    Ubuntu/Debian GNU/Linux

# Did the script work for you?
# Yes
# Yes, but with some errors
# Yes, but I had to change some things
# Not at all

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
# MA 02110-1301, USA.

monitor_diskspace()
{
    location="$1"
    minspace="$2"

    if [ ! -n "$location" ]
    then
        echo "location not set"
    fi

    if [ ! -n "$minspace" ]
    then
        echo "minspace not set"
    fi

    status="start"

    while [ "true" = "true" ]
    do
        diskspace=$(df --portability "$location" | awk 'END {print $4}')
        if [ ! "$diskspace" -gt "$minspace" ] && [ "$status" = "start" ]
        then
            echo "minimal disk space limit reached, executing stop command"
            human=$(df --human-readable --portability "$location" | awk 'END {print $4}')
            zenity --warning --text="minimal disk space limit reached, diskspace: $human"
            status="stop"
        fi
        if [ "$diskspace" -gt "$minspace" ] && [ "$status" = "stop" ]
        then
            echo "minimal disk space limit restored, executing start command"
            human=$(df --human-readable --portability "$location" | awk 'END {print $4}')
            zenity --warning --text="minimal disk space limit restored, diskspace: $human"
            status="start"
        fi
        sleep 120
    done
}

location="$HOME"
minspace="100000" # arround 100MB
monitor_diskspace "$location" "$minspace"

exit