Give Linux executables the privilege to bind to ports below 1024

bind-port-privilege.sh

#!/bin/bash

if (( $# != 2 )); then
	echo 'Control whether an executable has the privilege to bind to ports < 1024, even if the user is not root'
	echo
	echo "Usage: $(basename "$0") [enable|disable|status] [path-to-exectuable]"
	exit 1
fi

FILE=$(readlink -f "$2")

case "$1" in
	enable)
		sudo setcap 'cap_net_bind_service=+ep' "$FILE"
		;;
	disable)
		sudo setcap 'cap_net_bind_service=-ep' "$FILE"
		;;
	status)
		getcap "$FILE" | grep 'cap_net_bind_service+ep' &> /dev/null
		if [ $? == 0 ]; then
			echo 'enabled'
		else
			echo 'disabled'
		fi 
		;;
esac