openrc/sh/supervise-daemon.sh
William Hubbs 0f704402a2 supervise-daemon: make the pidfile an implementation detail
The pidfile of the supervisor doesn't need to be adjustable by the
service script. It is only used so the supervisor can stop itself when
the --stop option is used.
2018-11-15 14:15:15 -06:00

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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.
extra_commands="healthcheck unhealthy ${extra_commands}"
supervise_start()
{
if [ -z "$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}"
# The eval call is necessary for cases like:
# command_args="this \"is a\" test"
# to work properly.
eval supervise-daemon "${RC_SVCNAME}" --start \
${retry:+--retry} $retry \
${directory:+--chdir} $directory \
${chroot:+--chroot} $chroot \
${output_log+--stdout} ${output_log} \
${error_log+--stderr} $error_log \
${respawn_delay:+--respawn-delay} $respawn_delay \
${respawn_max:+--respawn-max} $respawn_max \
${respawn_period:+--respawn-period} $respawn_period \
${healthcheck_delay:+--healthcheck-delay} $healthcheck_delay \
${healthcheck_timer:+--healthcheck-timer} $healthcheck_timer \
${command_user+--user} $command_user \
${umask+--umask} $umask \
${supervise_daemon_args:-${start_stop_daemon_args}} \
$command \
-- $command_args $command_args_foreground
rc=$?
if [ $rc = 0 ]; then
[ -n "${chroot}" ] && service_set_value "chroot" "${chroot}"
fi
eend $rc "failed to start ${name:-$RC_SVCNAME}"
}
supervise_stop()
{
local startchroot="$(service_get_value "chroot")"
chroot="${startchroot:-$chroot}"
ebegin "Stopping ${name:-$RC_SVCNAME}"
supervise-daemon "${RC_SVCNAME}" --stop \
eend $? "Failed to stop ${name:-$RC_SVCNAME}"
}
_check_supervised()
{
local child_pid start_time
child_pid="$(service_get_value "child_pid")"
start_time="$(service_get_value "start_time")"
if [ -n "${child_pid}" ] && [ -n "${start_time}" ]; then
return 1
fi
return 0
}
supervise_status()
{
if service_stopping; then
ewarn "status: stopping"
return 4
elif service_starting; then
ewarn "status: starting"
return 8
elif service_inactive; then
ewarn "status: inactive"
return 16
elif service_started; then
if service_crashed; then
if ! _check_supervised; then
eerror "status: unsupervised"
return 64
fi
eerror "status: crashed"
return 32
fi
einfo "status: started"
return 0
else
einfo "status: stopped"
return 3
fi
}
healthcheck()
{
return 0
}
unhealthy()
{
return 0
}