#!/sbin/openrc-run
# Copyright 1999-2018 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

extra_commands="checkconfig"
extra_started_commands="reload"

: ${SSHD_CONFDIR:=${RC_PREFIX%/}/etc/ssh}
: ${SSHD_CONFIG:=${SSHD_CONFDIR}/sshd_config}
: ${SSHD_PIDFILE:=${RC_PREFIX%/}/run/${SVCNAME}.pid}
: ${SSHD_BINARY:=${RC_PREFIX%/}/usr/sbin/sshd}
: ${SSHD_KEYGEN_BINARY:=${RC_PREFIX%/}/usr/bin/ssh-keygen}

command="${SSHD_BINARY}"
pidfile="${SSHD_PIDFILE}"
command_args="${SSHD_OPTS} -o PidFile=${pidfile} -f ${SSHD_CONFIG}"

# Wait one second (length chosen arbitrarily) to see if sshd actually
# creates a PID file, or if it crashes for some reason like not being
# able to bind to the address in ListenAddress (bug 617596).
: ${SSHD_SSD_OPTS:=--wait 1000}
start_stop_daemon_args="${SSHD_SSD_OPTS}"

depend() {
	# Entropy can be used by ssh-keygen, among other things, but
	# is not strictly required (bug 470020).
	use logger dns entropy
	if [ "${rc_need+set}" = "set" ] ; then
		: # Do nothing, the user has explicitly set rc_need
	else
		local x warn_addr
		for x in $(awk '/^ListenAddress/{ print $2 }' "$SSHD_CONFIG" 2>/dev/null) ; do
			case "${x}" in
				0.0.0.0|0.0.0.0:*) ;;
				::|\[::\]*) ;;
				*) warn_addr="${warn_addr} ${x}" ;;
			esac
		done
		if [ -n "${warn_addr}" ] ; then
			need net
			ewarn "You are binding an interface in ListenAddress statement in your sshd_config!"
			ewarn "You must add rc_need=\"net.FOO\" to your ${RC_PREFIX%/}/etc/conf.d/sshd"
			ewarn "where FOO is the interface(s) providing the following address(es):"
			ewarn "${warn_addr}"
		fi
	fi
}

checkconfig() {
	checkpath --mode 0755 --directory "${RC_PREFIX%/}/var/empty"

	if [ ! -e "${SSHD_CONFIG}" ] ; then
		eerror "You need an ${SSHD_CONFIG} file to run sshd"
		eerror "There is a sample file in /usr/share/doc/openssh"
		return 1
	fi

	${SSHD_KEYGEN_BINARY} -A || return 2

	"${command}" -t ${command_args} || return 3
}

start_pre() {
	# If this isn't a restart, make sure that the user's config isn't
	# busted before we try to start the daemon (this will produce
	# better error messages than if we just try to start it blindly).
	#
	# If, on the other hand, this *is* a restart, then the stop_pre
	# action will have ensured that the config is usable and we don't
	# need to do that again.
	if [ "${RC_CMD}" != "restart" ] ; then
		checkconfig || return $?
	fi
}

stop_pre() {
	# If this is a restart, check to make sure the user's config
	# isn't busted before we stop the running daemon.
	if [ "${RC_CMD}" = "restart" ] ; then
		checkconfig || return $?
	fi
}

reload() {
	checkconfig || return $?
	ebegin "Reloading ${SVCNAME}"
	start-stop-daemon --signal HUP --pidfile "${pidfile}"
	eend $?
}