get ssl certificate and mail it to me for an fqdn

check_ssl_certificate.sh

#!/bin/bash

# ensure all arguments are there
if [ "$#" -ne 3 ]; then
    echo "Illegal number of parameters!"
    echo "EXAMPLE USAGE: " $0 " blah.somedomain.com 443 [email protected]" 
    exit
fi

HOSTNAME=$1
PORT=$2
EMAIL=$3

CERTFILE=$(printf "%s_%s" $HOSTNAME $PORT).pem

openssl s_client -showcerts -connect $HOSTNAME:$PORT </dev/null 2>/dev/null|openssl x509 -outform PEM >$CERTFILE
openssl x509 -inform PEM -in $CERTFILE -text > $CERTFILE.txt
echo "I FOUND:"
cat $CERTFILE.txt 
cat $CERTFILE.txt | mail -s "SSL Certificate Information For $HOSTNAME $PORT" $EMAIL

# reference
# output pem to certdata
#openssl x509 -inform PEM -in $CERTFILE -text -out certdata > $CERTFILE.txt