#!/bin/bash

mountpoints=('/mnt/sdb1' '/' '/mnt/backup/')
barWidth=50
maxDiscUsage=90
clear="\e[39m\e[0m"
dim="\e[2m"
barclear=""
echo
echo 'HDD free:'
for point in "${mountpoints[@]}"; do
    line=$(df -hl "${point}")
    usagePercent=$(echo "$line"|tail -n1|awk '{print $5;}'|sed 's/%//')
    usedBarWidth=$((($usagePercent*$barWidth)/100))
    barContent=""
    color="\e[32m"
    if [ "${usagePercent}" -ge "${maxDiscUsage}" ]; then
        color="\e[31m"
    fi
    barContent="${color}"
    for sep in $(seq 1 $usedBarWidth); do
        barContent="${barContent}|"
    done
    barContent="${barContent}${clear}${dim}"
    for sep in $(seq 1 $(($barWidth-$usedBarWidth))); do
        barContent="${barContent}-"
    done
    bar="[${barContent}${clear}]"
	echo "${line}" | awk  '{if ($1 != "Filesystem") printf("%-30s%+3s used out of %+5s\n", $1, $3, $2); }' | sed -e 's/^/  /'
	echo -e "${bar}" | sed -e 's/^/  /'

done