#!/sbin/runscript
# Copyright 1999-2015 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Id$

DOCKER_LOGFILE=${DOCKER_LOGFILE:-/var/log/${SVCNAME}.log}
DOCKER_PIDFILE=${DOCKER_PIDFILE:-/run/${SVCNAME}.pid}
DOCKER_BINARY=${DOCKER_BINARY:-/usr/bin/docker}
DOCKER_WORKAROUND_1422=${DOCKER_WORKAROUND_1422:-0}
DOCKER_WORKAROUND_1422_DELAY=${DOCKER_WORKAROUND_1422_DELAY:-1}

start() {
	checkpath -f -m 0644 -o root:docker "$DOCKER_LOGFILE"

	ebegin "Starting docker daemon"
	start-stop-daemon --start --background \
		--exec "$DOCKER_BINARY" \
		--pidfile "$DOCKER_PIDFILE" \
		--stdout "$DOCKER_LOGFILE" \
		--stderr "$DOCKER_LOGFILE" \
		-- -d -p "$DOCKER_PIDFILE"
	eend $?
	ret=$?

	if [ $ret -eq 0 ] \
		&& [ "$DOCKER_WORKAROUND_1422" ] \
		&& [ "$DOCKER_WORKAROUND_1422" -gt 0 ] \
	; then
		# see https://github.com/dotcloud/docker/issues/1422
		ewarn "Working around gh#1422 (via busybox image); this may take a moment"

		# we were calling "docker run" more quickly than "docker -d" could get
		#  fired up, so our workaround wasn't successful without a short delay
		sleep $DOCKER_WORKAROUND_1422_DELAY

		# TODO when we get https://github.com/dotcloud/docker/pull/1589, these
		#  both need -rm so we clean up after ourselves (thanks, @eliasp!)
		docker run -i -t busybox true &> /dev/null || true
		# first run will fail, so we ignore its output and result and run again
		docker run -i -t busybox true

		ewend $?
	fi

	return $ret
}

stop() {
	ebegin "Stopping docker daemon"
	start-stop-daemon --stop \
		--exec "$DOCKER_BINARY" \
		--pidfile "$DOCKER_PIDFILE"
	eend $?
}