#!/bin/bash -p export PATH=$HOME/bin:$PATH subject= apikey= apikey_c="XXX" while read foo; do [[ -z $foo ]] && break subject=${subject:-$(echo $foo | sed -n "s/[sS]ubject: IM: //p")} apikey=${apikey:-$(echo $foo | sed -n "s/X-apikey: //p")} done if [[ -n $subject && $apikey = $apikey_c ]]; then webtext -t 'YYY' "$subject" >/dev/null 2>&1 fi