Multi-distro LiveUSB/size.sh

#!/bin/sh
# If the work is copyrightable:

# 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.

iso="$1"

# Find the file size in bytes
link="$(readlink ${iso})" && iso="${link}"
size="$(ls -g -G ${iso} | awk '{print $3}')"

# Calculate the size in K, add padding if necessary
size_k="$(expr ${size} / 1024)"
size_k_rem="$(expr ${size} % 1024)"
if [ "${size_k_rem}" != "0" ] ; then
  size_k="$(expr ${size_k} + 1)"
fi

echo "+${size_k}K"