#!/bin/bash

# Copyright (c) 2013-2016 Wind River Systems, Inc.
#
# SPDX-License-Identifier: Apache-2.0
#
#
# This utility is primarily used by no reboot patching for process restart
#
# This script sends a json string containing the restart command
# and ${1} as the specified process name to pmond over the loopback
# interface on port 2117
#
# Linux Standard Base (LSB) Error Codes
RETVAL=0
GENERIC_ERROR=1
INVALID_ARGS=2
UNSUPPORTED_FEATURE=3
NOT_INSTALLED=5
NOT_RUNNING=7

PROTOCOL="UDP4-DATAGRAM"
ADDRESS="127.0.0.1"

socat_exec=`(which socat) 2> /dev/null`

process=${1}

if [ -z ${socat_exec} ] ; then
    logger "Error: $0 cannot find socat exec"
    exit ${NOT_INSTALLED}
fi

if [ ! -z ${process} ] ; then
    # hostwd is not a pmon monitored process
    if [ "${process}" == "hostwd" ] ; then
        systemctl restart hostw
    else
        port=$(cat /etc/mtc/pmond.conf | awk '{if ($1 == "pmon_cmd_port") { print $3; }}')
        echo "{\"command\":\"start\", \"process\":\"${process}\"}" | socat - ${PROTOCOL}:${ADDRESS}:${port}
    fi
else
    logger "Error: $0 called with no process specified"
    RETVAL=${INVALID_ARGS}
fi

exit ${RETVAL}