Apache ssl.conf modify, sslconf.sh {cert} {key} {chain}

sslconf.sh

#!/bin/bash
if [ -z $2 ] ; then
    echo "`basename $0` {cert} {key} {chain}"
else
    SSL_CONF=/etc/httpd/conf.d/ssl.conf
    if [ -f $SSL_CONF ] ; then
        if [ -f $1 ] ; then # cert
            sed -i "s/^SSLCertificateFile.*/SSLCertificateFile \/etc\/httpd\/conf.d\/$1/" $SSL_CONF
        fi
        if [ -f $2 ] ; then # cert
            sed -i "s/^SSLCertificateKeyFile.*/SSLCertificateKeyFile \/etc\/httpd\/conf.d\/$2/" $SSL_CONF
        fi
        if [ -n "$3" ] ; then # chain            
            if [ -f $3 ] ; then                
                sed -i "s/^#*SSLCertificateChainFile.*/SSLCertificateChainFile \/etc\/httpd\/conf.d\/$3/" $SSL_CONF
            fi
        fi
    else
        echo "$SSL_CONF not found"
    fi
fi