autossh

autossh (text/plain), 3.51 KB, created by Russell Harmon on 2008-12-24 09:45:06 UTC

#!/sbin/runscript
# Copyright 1999-2008 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: $

depend() {
	need net
	use dns
	local service="${SVCNAME#*.}" master="$(get_value master)"
	source /etc/conf.d/autossh
	[[ -n "$master" && "$master" != "no" ]] && need autossh.$master
	[[ "$(type -t depend_$service)" == "function" ]] && eval depend_$service
}

get_value() {
	source /etc/conf.d/autossh
	_get_value() {
		for i in "$@"; do
			if [[ -z "$varname" ]]; then
				varname="${i}"
			else
				varname="${varname}_${i}"
			fi
		done
		eval echo "${!varname}"
	}
	local retval service="${SVCNAME#*.}"
	retval="$(_get_value "$service" "$@")"
	if [[ -z "$retval" ]]; then
		retval="$(_get_value "global" "$@")"
	fi
	echo "$retval"
	return 0
}

start() {
	local service="${SVCNAME#*.}" interval="$(get_value alive_interval)" host="$(get_value host)" master="$(get_value master)" myargs debug="$(get_value debug)" ssdargs retval
	if [[ "$service" == "autossh" ]]; then
		eerror "Autossh must be started as a symlink (autossh.svcname)"
		return 1
	fi
	[[ -z "$interval" ]] && interval="15"
	if [[ -z "$host" && -z "$master" ]]; then
		eerror "No host/master specified for service $service"
		return 1
	fi
	if [[ ! -f "/var/log/autossh-$service.log" ]]; then
		touch "/var/log/autossh-$service.log"
		chown autossh:daemon "/var/log/autossh-$service.log"
	fi
	if [[ -z "$master" ]]; then
		myargs="${myargs} -o ControlMaster=yes"
		myargs="${myargs} -o ControlPath=/var/run/autossh/control-%r@%h-%p.sock"
	elif [[ "$master" != "no" ]]; then
		myargs="${myargs} -o ControlMaster=no"
		myargs="${myargs} -o ControlPath=/var/run/autossh/control-%r@%h-%p.sock"
		if [[ -n "$host" ]]; then
			eerror "Only one of host/master may be specified."
			return 1
		else
			host="$(SVCNAME="$master" get_value host)"
		fi
	fi
	myargs="${myargs} -o ConnectionAttempts=3"
	myargs="${myargs} -o BatchMode=yes"
	myargs="${myargs} -o EscapeChar=none"
	myargs="${myargs} -o ExitOnForwardFailure=yes"
	myargs="${myargs} -o ServerAliveInterval=$interval"
	myargs="${myargs} -o ForwardAgent=no"
	ssdargs="${ssdargs} --start"
	ssdargs="${ssdargs} --exec /usr/bin/autossh"
	ssdargs="${ssdargs} --pidfile /var/run/autossh/autossh-$service.pid"
	ssdargs="${ssdargs} --user autossh:daemon"
	ssdargs="${ssdargs} --env AUTOSSH_PORT=0"
	ssdargs="${ssdargs} --env AUTOSSH_LOGFILE=/var/log/autossh-$service.log"
	ssdargs="${ssdargs} --env AUTOSSH_PIDFILE=/var/run/autossh/autossh-$service.pid"
	ssdargs="${ssdargs} --chdir /var/lib/autossh"
	ssdargs="${ssdargs} --umask 0077"
	if [[ -z "$debug" ]]; then
		ebegin "Starting autossh instance $service"
		start-stop-daemon ${ssdargs} -- \
			-T \
			-n \
			-f \
			-N \
			$myargs \
			$(get_value args) \
			$(get_value args add) \
			"$host"
		eend $? "Failed to start autossh instance $service"
	else
		ebegin "Starting autossh instance $service in debug mode"
		start-stop-daemon ${ssdargs} \
			--env AUTOSSH_LOGLEVEL="7" \
			--env AUTOSSH_DEBUG="true" \
			--stdout "/var/lib/autossh/$service.stdout" \
			--stderr "/var/lib/autossh/$service.stderr" \
			--background \
			--verbose \
			-- \
				-n \
				-T \
				-N \
				-o "LogLevel=DEBUG3" \
				$myargs \
				$(get_value args) \
				$(get_value args add) \
				"$host"
		eend $? "Failed to start autossh instance $service"
	fi
}

stop() {
	local service="${SVCNAME#*.}"
	ebegin "Stopping autossh instance $service"
	start-stop-daemon --stop \
		--pidfile "/var/run/autossh/autossh-$service.pid" \
		--exec /usr/bin/autossh
	eend $? "Failed to stop autossh instance $service"
}