#!/bin/bash
# Script ----------------------------------------------------------------------
#
# Description - Thin wrapper for nmap -p PORT; greps for an open state
#               and alarms if it is not found.
#------------------------------------------------------------------------------
prog=${0##*/}
host=$1
nmap_cmd="/usr/bin/nmap -sT ${host} -p "
portlist=$2
usage="${prog} <hostname> \"port1 port2 port3 ...\""

syntax_error()
{
        echo "Incorrect syntax"
        echo $usage
        exit 1
}

[ $# -lt 2 ] && syntax_error
[ $# -gt 2 ] && syntax_error

for port in $portlist; do
        $nmap_cmd  $port|grep open >/dev/null
        if [ $? -gt 0 ]; then
                echo "Error! Port ${port} is closed on ${host}"
        fi
done

exit 0