#!/bin/bash
# Calculate disk usage of FTP, output human size (K/M/G) if needed
D=$[$(echo ls |ftpbackup-connect |awk '{print $5"+"}')0]
if [ $D -gt 1024 ]; then
  D=$[$D/1024]
  S="K"
  if [ $D -gt 1024 ]; then
    D=$[$D/1024]
    S="M"
    if [ $D -gt 1024 ]; then
      D=$[$D/1024]
      S="G"
    fi
  fi
fi
echo "$D$S"