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#!/bin/sh

# Exit status codes:
#   0 =  Version reported correctly
#   1 =  Error

TWS_TIMEOUT="15"

if ! test -e "$1"; then
	echo "Usage:   $0 <jar file | TWS dir>" 1>&2
	echo "Example: $0 $HOME/.tws_scripts/unixmacosx_latest.jar" 1>&2
	exit 1
fi

ARG1="$(readlink -v -f "$1")" || exit 1

TDIR="$(mktemp -d -t twsdir.XXXX)" || exit 1
trap "rm -rf ${TDIR}" exit
cd "${TDIR}" || exit 1

if test -d "${ARG1}"; then
	if test -f "${ARG1}/jts.ini" ;then
		TWS_DIR="${ARG1}"
	else
		echo "error: directory '"${ARG1}"' is not a TWS installation" 2>&1
		exit 1
	fi
else
	if jar xf "${ARG1}" &>/dev/null && test -f IBJts/jts.jar; then
		TWS_DIR="IBJts"
	else
		echo "error: invalid jar file '"${ARG1}"'" 2>&1
		exit 1
	fi
fi

TWS_HOME="${TDIR}/twshome"
mkdir "${TWS_HOME}" || exit 1
cp -a "${TWS_DIR}/jts.ini" "${TWS_HOME}" || exit 1
LOG_FIFO="${TDIR}/twslogpipe"
mkfifo "${LOG_FIFO}" || exit 1

TWS_CP="${TWS_DIR}/jts:${TWS_DIR}/*"
java -cp "${TWS_CP}" jclient.LoginFrame "${TWS_HOME}" &>"${LOG_FIFO}" &
disown
TWS_PID="$!"

VERSION_LINE="$(timeout --preserve-status "${TWS_TIMEOUT}" grep -m1 --line-buffered ": Build" "${LOG_FIFO}")"
kill -9 "${TWS_PID}" &>/dev/null

if test "${VERSION_LINE}" == ""; then
	echo "could not grep version string" 1>&2
	exit 1
fi

echo "${VERSION_LINE}" |sed -e 's/.*Build //1' -e 's/,.*//1'