#! /bin/sh
#
# Script to start the MX server and MX autosave processes at boot time.
#
# This version of the script runs as root, but starts up mxserver and
# mxautosave under a non-root user account which is 'mx' by default.
#
#-------------------------------------------------------------------------
# The following makes the script LSB (Linux Standard Base) compatible.
#
### BEGIN INIT INFO
# Provides:          mxdaq
# Required-Start:    $all
# Required-Stop:     
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Start mxserver and mxautosave at boot time.
# Description:       Enables the MX data acquisition system servers.
### END INIT INFO
#
#-------------------------------------------------------------------------
# The following is for the use of the old Red Hat Linux chkconfig command:
#
# chkconfig: 2345 99 01
# description: Server control script for the MX data acquisition \
#              and control system.
# processname: mxserver
#

if [ x$MXDIR = x ]; then
	MXDIR=/opt/mx
fi

MXBIN=${MXDIR}/bin
MXETC=${MXDIR}/etc
MXLOG=${MXDIR}/log
MXRUN=${MXDIR}/run
MXSBIN=${MXDIR}/sbin

MX_LOCAL_CONFIG=${MXETC}/mx_local_config

START_MXSERVER=${MXSBIN}/startmxserver
START_MXAUTOSAVE=${MXSBIN}/startmxautosave

#---

# The following makes sure that whoami is in the path on Solaris 2 and SunOS 4
# and that libMx.dll is in the path on Cygwin.

PATH="$PATH:$MXBIN:/usr/ucb:/sbin"

export PATH

# Find out which user is running this script.

SCRIPTUSER=`whoami`

# Which user are the MX server and autosave processes to be run as?

MXUSER_FILE=${MXDIR}/etc/mxuser.dat

if [ -f ${MXUSER_FILE} ]; then
	MXUSER=`cat ${MXUSER_FILE}`
else
	MXUSER=mx
fi

# Construct a prefix for the server startup commands below.

UNAME_OS=`uname`

if [ $SCRIPTUSER = $MXUSER ]; then
	COMMAND_PREFIX=
elif [ $SCRIPTUSER = "root" ]; then
	if [ $UNAME_OS = "Darwin" ]; then
		COMMAND_PREFIX="/usr/bin/su $MXUSER -c"
	elif [ $UNAME_OS = "FreeBSD" ]; then
		COMMAND_PREFIX="/usr/bin/su $MXUSER -c"
	elif [ $UNAME_OS = "NetBSD" ]; then
		COMMAND_PREFIX="/usr/bin/su $MXUSER -c"
	elif [ $UNAME_OS = "OpenBSD" ]; then
		COMMAND_PREFIX="/usr/bin/su $MXUSER -c"
	else
		COMMAND_PREFIX="/bin/su $MXUSER -c"
	fi
else
	echo "This script must be run either as the MX user '$MXUSER' or as 'root'."
	echo "You are '$SCRIPTUSER', so this script is aborting."
	exit 1
fi

#---

MXSERVER_OPTIONS_FILE=${MXDIR}/etc/mxserver.opt

if [ -f ${MXSERVER_OPTIONS_FILE} ]; then
	MXSERVER_OPTIONS=`cat ${MXSERVER_OPTIONS_FILE}`
fi

START_MXSERVER_CMD="${START_MXSERVER} ${MXSERVER_OPTIONS}"

#---

MXAUTOSAVE_OPTIONS_FILE=${MXDIR}/etc/mxautosave.opt

if [ -f ${MXAUTOSAVE_OPTIONS_FILE} ]; then
	MXAUTOSAVE_OPTIONS=`cat ${MXAUTOSAVE_OPTIONS_FILE}`
fi

START_MXAUTOSAVE_CMD="$START_MXAUTOSAVE ${MXAUTOSAVE_OPTIONS}"

#---

#echo "SCRIPTUSER=$SCRIPTUSER"
#echo "MXUSER=$MXUSER"
#echo "COMMAND_PREFIX=$COMMAND_PREFIX"
#echo "START_MXSERVER_CMD=$START_MXSERVER_CMD"
#echo "START_MXAUTOSAVE_CMD=$START_MXAUTOSAVE_CMD"

case $1 in
    'start' )
	echo "Starting the MX servers."

	# If possible, fix any outstanding permission problems.

	if [ $SCRIPTUSER = "root" ]; then
		chown $MXUSER ${MXDIR}/log
		chown $MXUSER ${MXDIR}/run
		chown $MXUSER ${MXDIR}/state

		chown $MXUSER ${MXDIR}/log/*.log
	fi

	if [ -f $MX_LOCAL_CONFIG ]; then
		. $MX_LOCAL_CONFIG
	fi

	if [ -x $START_MXSERVER ]; then

		if [ $SCRIPTUSER = "root" ]; then
			$COMMAND_PREFIX "touch ${MXLOG}/mxserver.log"

			$COMMAND_PREFIX "$START_MXSERVER_CMD"
		else
			touch ${MXLOG}/mxserver.log

			$START_MXSERVER_CMD
		fi

		if [ -x $START_MXAUTOSAVE ]; then
			if [ $SCRIPTUSER = "root" ]; then
				$COMMAND_PREFIX "touch ${MXLOG}/mxautosave.log"

				$COMMAND_PREFIX "$START_MXAUTOSAVE_CMD"
			else
				touch ${MXLOG}/mxautosave.log

				$START_MXAUTOSAVE_CMD
			fi
		fi
	fi
	;;
    'stop' )
	echo "Stopping the MX servers."

	if [ -f ${MXRUN}/mxserver.pid ]; then
		MXSERVER_PID=`cat ${MXRUN}/mxserver.pid`
		kill $MXSERVER_PID
		rm ${MXRUN}/mxserver.pid
	fi

	if [ -f ${MXRUN}/mxautosave.pid ]; then
		MXAUTOSAVE_PID=`cat ${MXRUN}/mxautosave.pid`
		kill $MXAUTOSAVE_PID
		rm ${MXRUN}/mxautosave.pid
	fi
	;;
    'restart' )
	$0 stop
	echo "Waiting 2 seconds for the servers to shut down."
	sleep 2
	$0 start
	;;
    'force-reload' )
	$0 stop
	echo "Waiting 2 seconds for the servers to shut down."
	sleep 2
	$0 start
	;;
    'status' )
	echo "Status not implemented."
	;;
    *)
	echo "Usage: ${MXDIR}/sbin/mx {start|stop|restart}"
	;;
esac

exit 0