openrc/sh/supervise-daemon.sh
William Hubbs 62410eaf4b add daemon supervisor
The supervise-daemon process is meant to be a lightweight supervisor
which can monitor and restart a daemon if it crashes.
2016-04-27 11:13:50 -05:00

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# start / stop / status functions for supervise-daemon
# Copyright (c) 2016 The OpenRC Authors.
# See the Authors file at the top-level directory of this distribution and
# https://github.com/OpenRC/openrc/blob/master/AUTHORS
#
# This file is part of OpenRC. It is subject to the license terms in
# the LICENSE file found in the top-level directory of this
# distribution and at https://github.com/OpenRC/openrc/blob/master/LICENSE
# This file may not be copied, modified, propagated, or distributed
# except according to the terms contained in the LICENSE file.
supervise_start()
{
if [ -z "$command" ]; then
ewarn "The command variable is undefined."
ewarn "There is nothing for ${name:-$RC_SVCNAME} to start."
return 1
fi
ebegin "Starting ${name:-$RC_SVCNAME}"
eval supervise-daemon --start \
${pidfile:+--pidfile} $pidfile \
${command_user+--user} $command_user \
$supervise_daemon_args \
$command \
-- $command_args $command_args_foreground
rc=$?
[ -n "${pidfile}" ] && service_set_value "pidfile" "${pidfile}"
eend $rc "failed to start $RC_SVCNAME"
}
supervise_stop()
{
local startpidfile="$(service_get_value "pidfile")"
pidfile="${startpidfile:-$pidfile}"
[ -n "$pidfile" ] || return 0
ebegin "Stopping ${name:-$RC_SVCNAME}"
supervise-daemon --stop \
${pidfile:+--pidfile} $pidfile \
${stopsig:+--signal} $stopsig
eend $? "Failed to stop $RC_SVCNAME"
}
supervise_status()
{
_status
}