#!/bin/sh
# chkconfig: 2345 50 50
### BEGIN INIT INFO
# Provides:          openssh
# Required-Start:    $network
# Required-Stop:     $network
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Start openssh at boot time
# Description:       Enable service provided by openssh.
# X-Start-Before:    
# X-Stop-After:      
# X-Timesys-Start-Number:  50
# X-Timesys-Stop-Number:  50
### END INIT INFO

umask 022

prefix=/usr
sysconfdir=/etc
piddir=/var/run

if [ -d /etc/ssh ]; then
	sysconfdir=/etc/ssh
fi
if [ -d /etc/openssh ]; then
	sysconfdir=/etc/openssh
fi

SSHD=$prefix/sbin/sshd
PIDFILE=$piddir/sshd.pid
SSH_KEYGEN=$prefix/bin/ssh-keygen
HOST_KEY_RSA1=$sysconfdir/ssh_host_key
HOST_KEY_DSA=$sysconfdir/ssh_host_dsa_key
HOST_KEY_RSA=$sysconfdir/ssh_host_rsa_key
HOST_KEY_ECDSA=$sysconfdir/ssh_host_ecdsa_key


checkkeys() {
    if [ ! -f $HOST_KEY_RSA1 ]; then
	    ${SSH_KEYGEN} -t rsa1 -f ${HOST_KEY_RSA1} -N ""
    fi
    if [ ! -f $HOST_KEY_DSA ]; then
	    ${SSH_KEYGEN} -t dsa -f ${HOST_KEY_DSA} -N ""
    fi
    if [ ! -f $HOST_KEY_RSA ]; then
	    ${SSH_KEYGEN} -t rsa -f ${HOST_KEY_RSA} -N ""
    fi
    if [ ! -f $HOST_KEY_ECDSA ]; then
	    ${SSH_KEYGEN} -t ecdsa -f ${HOST_KEY_ECDSA} -N ""
    fi
}

stop_service() {
    if [  -r $PIDFILE  -a  ! -z ${PIDFILE}  ]; then
	    PID=`cat ${PIDFILE}`
    fi
    if [  ${PID:=0} -gt 1 -a  ! "X$PID" = "X "  ]; then
	    kill ${PID}
    else
	    echo "Unable to read PID file"
    fi
}

start_service() {

    if [ -z "$(grep ^sshd /etc/passwd 2>/dev/null)" ]; then
        echo "$0: Creating system user 'sshd' with generic settings.  Review and modify as required."
        yes '' | adduser sshd >/dev/null 2>&1 || yes '' | useradd sshd >/dev/null 2>&1
    fi

    # Check to see if we have keys that need to be made
    checkkeys

    # setup /var/empty
	mkdir -p /var/empty
	chown root /var/empty
	chmod 755 /var/empty

    mkdir -p $piddir

    # Start SSHD
    printf "Starting $SSHD: "         ; $SSHD

    sshd_rc=$?
    if [ $sshd_rc -ne 0 ]; then
            echo "[FAIL]"
	    echo "$0: Error ${sshd_rc} starting ${SSHD}... bailing."
	    exit $sshd_rc
    fi
    echo "[ OK ]"
}

case $1 in

'start')
    start_service
    ;;

'stop')
    stop_service
    ;;

'restart')
    stop_service
    start_service
    ;;

*)
    echo "Usage: $0 [start|stop|restart]"
    ;;
esac
