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#! /bin/sh
set -e

# /etc/init.d/ssh: start and stop the OpenBSD "secure shell" daemon

test -x /usr/sbin/sshd || exit 0
( /usr/sbin/sshd -\? 2>&1 | grep -q OpenSSH ) 2>/dev/null || exit 0

if test -f /etc/default/ssh; then
    . /etc/default/ssh
fi

check_for_no_start() {
    # forget it if we're trying to start, and /etc/ssh/sshd_not_to_be_run exists
    if [ -e /etc/ssh/sshd_not_to_be_run ]; then 
	echo "OpenBSD Secure Shell server not in use (/etc/ssh/sshd_not_to_be_run)"
	exit 0
    fi
}

check_privsep_dir() {
    # Create the PrivSep empty dir if necessary
    if [ ! -d /var/run/sshd ]; then
	mkdir /var/run/sshd
	chmod 0755 /var/run/sshd
    fi
}

check_config() {
	/usr/sbin/sshd -t || exit 1
}

check_keys() {
	# create keys if necessary
	if [ ! -f /etc/ssh/ssh_host_rsa_key ]; then
		echo "  generating ssh RSA key..."
		ssh-keygen -q -f /etc/ssh/ssh_host_rsa_key -N '' -t rsa
	fi
	if [ ! -f /etc/ssh/ssh_host_ecdsa_key ]; then
		echo "  generating ssh ECDSA key..."
		ssh-keygen -q -f /etc/ssh/ssh_host_ecdsa_key -N '' -t ecdsa
	fi
	if [ ! -f /etc/ssh/ssh_host_dsa_key ]; then
		echo "  generating ssh DSA key..."
		ssh-keygen -q -f /etc/ssh/ssh_host_dsa_key -N '' -t dsa
	fi
}

export PATH="${PATH:+$PATH:}/usr/sbin:/sbin"

case "$1" in
  start)
	check_for_no_start
	echo "Starting OpenBSD Secure Shell server: sshd"
	check_keys
	check_privsep_dir
	start-stop-daemon -S -x /usr/sbin/sshd -- $SSHD_OPTS
        echo "done."
	;;
  stop)
        echo -n "Stopping OpenBSD Secure Shell server: sshd"
	start-stop-daemon -K -x /usr/sbin/sshd
        echo "."
	;;

  reload|force-reload)
	check_for_no_start
	check_keys
	check_config
        echo -n "Reloading OpenBSD Secure Shell server's configuration"
	start-stop-daemon -K -s 1 -x /usr/sbin/sshd
	echo "."
	;;

  restart)
  	check_keys
	check_config
        echo -n "Restarting OpenBSD Secure Shell server: sshd"
	start-stop-daemon -K -oknodo -x /usr/sbin/sshd
	check_for_no_start
	check_privsep_dir
	sleep 2
	start-stop-daemon -S -x /usr/sbin/sshd -- $SSHD_OPTS
	echo "."
	;;

  *)
	echo "Usage: /etc/init.d/ssh {start|stop|reload|force-reload|restart}"
	exit 1
esac

exit 0