#!/bin/bash
# Calculate duration from time in seconds
if [ $# -lt 1 ]; then
        echo "Usage: $0 <seconds>"
	echo "Outputs duration: Dd Hh Mm Ss"
        exit 1
fi
T=$1
D=$[$T/60/60/24]
H=$[($T-($D*60*60*24))/60/60]
M=$[($T-($D*60*60*24)-($H*60*60))/60]
S=$[$T-($D*60*60*24)-($H*60*60)-($M*60)]
echo "${D}d ${H}h ${M}m ${S}s"