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Current File : //etc/rc.d/rc0.d/K25sshd
#!/bin/bash
#
# sshd		Start up the OpenSSH server daemon
#
# chkconfig: 2345 55 25
# description: SSH is a protocol for secure remote shell access. \
#              This service starts up the OpenSSH server daemon.
#
# processname: sshd
# config: /etc/ssh/ssh_host_key
# config: /etc/ssh/ssh_host_key.pub
# config: /etc/ssh/ssh_random_seed
# config: /etc/ssh/sshd_config
# pidfile: /var/run/sshd.pid

### BEGIN INIT INFO
# Provides: sshd
# Required-Start: $local_fs $network $syslog
# Required-Stop: $local_fs $syslog
# Should-Start: $syslog
# Should-Stop: $network $syslog
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Start up the OpenSSH server daemon
# Description:       SSH is a protocol for secure remote shell access.
#		     This service starts up the OpenSSH server daemon.
### END INIT INFO

# source function library
. /etc/rc.d/init.d/functions

# pull in sysconfig settings
[ -f /etc/sysconfig/sshd ] && . /etc/sysconfig/sshd

RETVAL=0
prog="sshd"
lockfile=/var/lock/subsys/$prog

# Some functions to make the below more readable
KEYGEN=/usr/bin/ssh-keygen
SSHD=/usr/sbin/sshd
RSA1_KEY=/etc/ssh/ssh_host_key
RSA_KEY=/etc/ssh/ssh_host_rsa_key
DSA_KEY=/etc/ssh/ssh_host_dsa_key
PID_FILE=/var/run/sshd.pid

runlevel=$(set -- $(runlevel); eval "echo \$$#" )

fips_enabled() {
	if [ -r /proc/sys/crypto/fips_enabled ]; then
		cat /proc/sys/crypto/fips_enabled
	else
		echo 0
	fi
}

do_rsa1_keygen() {
	if [ ! -s $RSA1_KEY -a `fips_enabled` -eq 0 ]; then
		echo -n $"Generating SSH1 RSA host key: "
		rm -f $RSA1_KEY
		if test ! -f $RSA1_KEY && $KEYGEN -q -t rsa1 -f $RSA1_KEY -C '' -N '' >&/dev/null; then
			chmod 600 $RSA1_KEY
			chmod 644 $RSA1_KEY.pub
			if [ -x /sbin/restorecon ]; then
			    /sbin/restorecon $RSA1_KEY.pub
			fi
			success $"RSA1 key generation"
			echo
		else
			failure $"RSA1 key generation"
			echo
			exit 1
		fi
	fi
}

do_rsa_keygen() {
	if [ ! -s $RSA_KEY ]; then
		echo -n $"Generating SSH2 RSA host key: "
		rm -f $RSA_KEY
		if test ! -f $RSA_KEY && $KEYGEN -q -t rsa -f $RSA_KEY -C '' -N '' >&/dev/null; then
			chmod 600 $RSA_KEY
			chmod 644 $RSA_KEY.pub
			if [ -x /sbin/restorecon ]; then
			    /sbin/restorecon $RSA_KEY.pub
			fi
			success $"RSA key generation"
			echo
		else
			failure $"RSA key generation"
			echo
			exit 1
		fi
	fi
}

do_dsa_keygen() {
	if [ ! -s $DSA_KEY -a `fips_enabled` -eq 0 ]; then
		echo -n $"Generating SSH2 DSA host key: "
		rm -f $DSA_KEY
		if test ! -f $DSA_KEY && $KEYGEN -q -t dsa -f $DSA_KEY -C '' -N '' >&/dev/null; then
			chmod 600 $DSA_KEY
			chmod 644 $DSA_KEY.pub
			if [ -x /sbin/restorecon ]; then
			    /sbin/restorecon $DSA_KEY.pub
			fi
			success $"DSA key generation"
			echo
		else
			failure $"DSA key generation"
			echo
			exit 1
		fi
	fi
}

do_restart_sanity_check()
{
	$SSHD -t
	RETVAL=$?
	if [ $RETVAL -ne  0 ]; then
		failure $"Configuration file or keys are invalid"
		echo
	fi
}

start()
{
	[ -x $SSHD ] || exit 5
	[ -f /etc/ssh/sshd_config ] || exit 6
	# Create keys if necessary
	if [ "x${AUTOCREATE_SERVER_KEYS}" != xNO ]; then
		do_rsa_keygen
		if [ "x${AUTOCREATE_SERVER_KEYS}" != xRSAONLY ]; then
			do_rsa1_keygen
			do_dsa_keygen
		fi
	fi

	echo -n $"Starting $prog: "
	$SSHD $OPTIONS && success || failure
	RETVAL=$?
	[ $RETVAL -eq 0 ] && touch $lockfile
	echo
	return $RETVAL
}

stop()
{
	echo -n $"Stopping $prog: "
	killproc -p $PID_FILE $SSHD
	RETVAL=$?
	# if we are in halt or reboot runlevel kill all running sessions
	# so the TCP connections are closed cleanly
	if [ "x$runlevel" = x0 -o "x$runlevel" = x6 ] ; then
	    trap '' TERM
	    killall $prog 2>/dev/null
	    trap TERM
	fi
	[ $RETVAL -eq 0 ] && rm -f $lockfile
	echo
}

reload()
{
	echo -n $"Reloading $prog: "
	killproc -p $PID_FILE $SSHD -HUP
	RETVAL=$?
	echo
}

restart() {
	stop
	start
}

force_reload() {
	restart
}

rh_status() {
	status -p $PID_FILE openssh-daemon
}

rh_status_q() {
	rh_status >/dev/null 2>&1
}

case "$1" in
	start)
		rh_status_q && exit 0
		start
		;;
	stop)
		if ! rh_status_q; then
			rm -f $lockfile
			exit 0
		fi
		stop
		;;
	restart)
		restart
		;;
	reload)
		rh_status_q || exit 7
		reload
		;;
	force-reload)
		force_reload
		;;
	condrestart|try-restart)
		rh_status_q || exit 0
		if [ -f $lockfile ] ; then
			do_restart_sanity_check
			if [ $RETVAL -eq 0 ] ; then
				stop
				# avoid race
				sleep 3
				start
			else
				RETVAL=6
			fi
		fi
		;;
	status)
		rh_status
		RETVAL=$?
		if [ $RETVAL -eq 3 -a -f $lockfile ] ; then
			RETVAL=2
		fi
		;;
	*)
		echo $"Usage: $0 {start|stop|restart|reload|force-reload|condrestart|try-restart|status}"
		RETVAL=2
esac
exit $RETVAL
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