zabbix ssl check

ssl_chek.sh

#SSL
HOST=$1
PORT=$2
expires_in(){
    EXP_DATE=$(
    echo "" | openssl s_client -connect $HOST:$PORT 2>/dev/null \
    | sed -n '/-----BEGIN CERTIFICATE-----/,/-----END CERTIFICATE-----/p' \
    | openssl x509 -noout -in - -enddate \
    | sed 's/notAfter=//'
)
    DAYS_LEFT=$(( ($(date -d "$EXP_DATE" +%s) - $(date -d "now" +%s) ) / 86400 ))
    #echo $DAYS_LEFT days
    echo $DAYS_LEFT
    #exit
}


echo $(expires_in)

#./ssl_chek.sh opennet.ru 443