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#!/sbin/openrc-run
# Copyright 1999-2017 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

extra_started_commands="attach resume suspend"

depend() {
	# we can use dns and net, but we can also in most cases live without them
	use dns net ntp-client ntpd
}

create_work_directory() {
	local sslcrt="/etc/ssl/certs/ca-certificates.crt"

	if [ ! -d "${RUNTIMEDIR}" ]; then
		einfo "Directory ${RUNTIMEDIR} does not exist, creating now."
		if ! mkdir -p "${RUNTIMEDIR}"; then
			eerror "Directory ${RUNTIMEDIR} could not be created!"
			return 1
		fi

		# ensure proper ownership
		if ! chown "${USER}:${GROUP}" "${RUNTIMEDIR}"; then
			eerror "Changing ownership of '${RUNTIMEDIR}' to '${USER}:${GROUP}' failed!"
			return 1
		fi
	fi

	if [ ! -e "${RUNTIMEDIR}"/ca-bundle.crt ]; then
		if [ ! -f "${sslcrt}" ]; then
			eerror "'${sslcrt}' does not exist!"
			return 1
		fi

		if ! ln -s "${sslcrt}" "${RUNTIMEDIR}"/ca-bundle.crt; then
			eerror "Symlinking '${sslcrt}' failed!"
			return 1
		fi
	fi

	return 0
}

fix_lib_symlinks() {
	local src="$1"
	local tgt="$2"

	# If the source does not exist, we can not do anything
	if [ ! -f "${src}" ] ; then
		return 1
	fi

	# Check whether the symlink is already there and in order
	if [ -L "${tgt}" ] ; then
		if [ -f "${tgt}" ] ; then
			return 0
		fi

		# Remove broken symlink
		if ! rm -f "${tgt}"; then
			eerror "Removing '${tgt}' failed!"
			return 1
		fi
	fi

	# symlink the correct path
	if ! ln -snf "${src}" "${tgt}"; then
		eerror "Symlinking '${src}' to '${tgt}' failed!"
		return 1
	fi

	return 0
}

cuda_check() {
	local libsource="/opt/cuda/lib/libcudart.so"
	local libtarget="${RUNTIMEDIR}/libcudart.so"

	fix_lib_symlinks "${libsource}" "${libtarget}" || return 1
	return 0
}

opencl_check() {
	local libsource="/usr/lib/libOpenCL.so"
	local libtarget="${RUNTIMEDIR}/libOpenCL.so"

	fix_lib_symlinks "${libsource}" "${libtarget}" || return 1
	return 0
}

env_check() {
	# Make sure the configuration is sane
	: ${USER:="boinc"}
	: ${GROUP:="boinc"}
	: ${RUNTIMEDIR:="/var/lib/boinc"}
	: ${BOINCBIN:="$(which boinc_client)"}
	: ${BOINC_PIDFILE:="/var/run/boinc_client.pid"}
	: ${BOINCCMD:="$(which /usr/bin/boinccmd)"}
	: ${ALLOW_REMOTE_RPC:="yes"}
	: ${NICELEVEL:="19"}
	# ARGS is not checked, it could have been explicitly set
	# to be empty by the user.

	# If the client was not found (how?) something is seriously wrong
	if [ ! -x "${BOINCBIN}" ]; then
		eerror "No boinc_client found!"
		return 1
	fi

	# The boinccmd is crucial, or we can not attach, suspend or resume
	# the boinc client
	if [ ! -x "${BOINCCMD}" ]; then
		eerror "No boinccmd program found!"
		return 1
	fi

	return 0
}

need_passwd_arg() {
	local vers=$(${BOINCBIN} --version | tr -d .)
	[ -z "${vers}" ] && vers="00"
	[ $(expr substr "${vers}" 1 2) -lt 74 ] && return 0

	# From version 7.4 on, the default is to read
	# gui_rpc_auth.cfg for the password.

	return 1
}

start_pre() {
	env_check || return 1
	create_work_directory || return 1
	cuda_check || einfo "CUDA not supported"
	opencl_check || einfo "OpenCL not supported"

	if [ ! -f "${RUNTIMEDIR}/lockfile" ]; then
		einfo "File \"${RUNTIMEDIR}/lockfile\" does not exist, assuming first run."
		einfo "You need to setup an account on the BOINC project homepage beforehand!"
		einfo "Go to http://boinc.berkeley.edu/ and locate your project."
		einfo "Then either run ${RC_SERVICE} attach or connect with a gui client"
		einfo "and attach to a project with that."
		einfo ""
		ewarn "Note that for attaching to some project you need your network up and running."
		ewarn "network is needed only for jobs fetching afterwards"
	fi

	return 0
}

start() {
	if [ "${ALLOW_REMOTE_RPC}" = "yes" ]; then
		ARGS="${ARGS} --allow_remote_gui_rpc"
	fi

	ARGS="${ARGS} --dir "${RUNTIMEDIR}" --redirectio"

	ebegin "Starting ${RC_SVCNAME}"
	start-stop-daemon --start --nicelevel ${NICELEVEL} \
		--user "${USER}:${GROUP}" --quiet --make-pidfile \
		--pidfile "${BOINC_PIDFILE}" --background \
		--exec "${BOINCBIN}" -- ${ARGS}
	eend $?
}

attach() {
	local password=""
	local url=""
	local key=""

	env_check || return 1

	einfo "If you can't find your account key just try to obtain it by using:"
	einfo "    boinccmd --passwd PASSWORD_FROM_GUI_RPC_AUTH --lookup_account URL EMAIL PASSWORD"

	printf "    Enter the Project URL: "
	read url
	printf "    Enter your Account Key: "
	read key

	if ! service_started; then
		"${RC_SERVICE}" start
	fi

	if need_passwd_arg; then
		password="--passwd \"$(cat "${RUNTIMEDIR}/gui_rpc_auth.cfg")\""
	fi

	ebegin "${RC_SVCNAME}: Attaching to project"
	start-stop-daemon --user "${USER}:${GROUP}" --quiet \
		--chdir "${RUNTIMEDIR}" --exec "${BOINCCMD}" \
		-- ${password} --project_attach ${url} ${key}
	eend $?

	sleep 10
	tail "${RUNTIMEDIR}/stdoutdae.txt"
}

stop() {
	local password=""
	local stop_timeout="SIGTERM/60/SIGTERM/30/SIGKILL/30"

	env_check || return 1

	if need_passwd_arg; then
		password="--passwd \"$(cat "${RUNTIMEDIR}/gui_rpc_auth.cfg")\""
	fi

	ebegin "Stopping ${RC_SVCNAME}"
	start-stop-daemon --stop --quiet --progress \
		--retry ${stop_timeout} \
		--pidfile "${BOINC_PIDFILE}"
	eend $?
}

resume() {
	env_check || return 1

	local password=""

	if need_passwd_arg; then
		password="--passwd \"$(cat "${RUNTIMEDIR}/gui_rpc_auth.cfg")\""
	fi

	for url in $(cd "${RUNTIMEDIR}" ; \
		  "${BOINCCMD}" ${password} --get_project_status | \
		  sed -n 's/\s*master URL: //p'); do
		ebegin "Resuming ${url}"
		start-stop-daemon --user "${USER}:${GROUP}" --quiet \
			--chdir "${RUNTIMEDIR}" --exec "${BOINCCMD}" \
			-- ${password} --project ${url} resume
		eend $?
	done
}

suspend() {
	env_check || return 1

	local password=""

	if need_passwd_arg; then
		password="--passwd \"$(cat "${RUNTIMEDIR}/gui_rpc_auth.cfg")\""
	fi

	for url in $(cd "${RUNTIMEDIR}" ; \
		  "${BOINCCMD}" ${password} --get_project_status | \
		  sed -n 's/\s*master URL: //p'); do
		ebegin "Suspending ${url}"
		start-stop-daemon --user "${USER}:${GROUP}" --quiet \
			--chdir "${RUNTIMEDIR}" --exec "${BOINCCMD}" \
			-- ${password} --project ${url} suspend
		eend $?
	done
}
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