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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}"
# The eval call is necessary for cases like:
# command_args="this \"is a\" test"
# to work properly.
eval supervise-daemon --start \
${retry:+--retry} $retry \
${chroot:+--chroot} $chroot \
${pidfile:+--pidfile} $pidfile \
${respawn_delay:+--respawn-delay} $respawn_delay \
${respawn_max:+--respawn-max} $respawn_max \
${respawn_period:+--respawn-period} $respawn_period \
${command_user+--user} $command_user \
$supervise_daemon_args \
$command \
-- $command_args $command_args_foreground
rc=$?
if [ $rc = 0 ]; then
[ -n "${chroot}" ] && service_set_value "chroot" "${chroot}"
[ -n "${pidfile}" ] && service_set_value "pidfile" "${pidfile}"
fi
eend $rc "failed to start ${name:-$RC_SVCNAME}"
}
supervise_stop()
{
local startchroot="$(service_get_value "chroot")"
local startpidfile="$(service_get_value "pidfile")"
chroot="${startchroot:-$chroot}"
pidfile="${startpidfile:-$pidfile}"
[ -n "$pidfile" ] || return 0
ebegin "Stopping ${name:-$RC_SVCNAME}"
supervise-daemon --stop \
${pidfile:+--pidfile} $chroot$pidfile \
${stopsig:+--signal} $stopsig
eend $? "Failed to stop ${name:-$RC_SVCNAME}"
}
_check_supervised()
{
[ "$RC_UNAME" != Linux ] && return 0
local child_pid="$(service_get_value "child_pid")"
local pid="$(cat ${pidfile})"
if [ -n "${child_pid}" ]; then
if ! [ -e "/proc/${pid}" ] && [ -e "/proc/${child_pid}" ]; then
if [ -e "/proc/self/ns/pid" ] && [ -e "/proc/${child_pid}/ns/pid" ]; then
local n1 n2
n1=$(readlink "/proc/self/ns/pid")
n2=$(readlink "/proc/${child_pid}/ns/pid")
if [ "${n1}" = "${n2}" ]; then
return 1
fi
fi
fi
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
}
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