Shell script to copy the referenced file permissions to another file (BSD).

#!/bin/sh

#
# Copies the referenced file's permissions to another file (BSD).
#
# see: http://unix.stackexchange.com/a/20650
#

set -e

reference_file=$1

if [ -z "${reference_file}" ]; then
    echo "Usage: cp-permissions <reference_file> <target_file(s)>"
    echo "       Copies the referenced file's permissions to another file (BSD)."
    exit 1
fi

shift
target_files=$*
chmod $(stat -f '%Lp' "${reference_file}") "${target_files}"