#!/bin/sh

type="MIT-MAGIC-COOKIE"

if [ $# -ne 1 ]; then
	echo "usage: $0 <display>"
	exit 1
fi

display=$1
odisplay=$1

ok=0
xargs=""

attempts=""
checkCookie() {
    cookie=`xauth $xargs list $display 2> /dev/null | grep $type | \
	sed 's/.*[ \t]\([^ \t][^ \t]*\)$/\1/' `
    attempts="$attempts $display"
}

checkCookie

if [ "$cookie" = "" ]; then
    # try removing trailing .#
    display=`echo $display | sed 's/\.[0-9]$//'`
    checkCookie
fi

if [ "$cookie" = "" ]; then
    # try :# if hostname is localhost or `hostname`
    dhost=`echo $display | sed 's/:[^:]*//'`
    [ "$dhost" = "localhost" -o "$dhost" = `hostname` ] && \
	display=`echo $display | sed 's/^[^:]*//'`
    checkCookie
fi

if [ "$cookie" = "" ]; then
    #if XAUTHORITY is set, maybe we can find a cookie in the default location
    xargs="-f $HOME/.Xauthority"
    checkCookie
fi

if [ "$cookie" = "" ]; then
	echo "$0: could not find cookie for display $odisplay"
	echo "  looked for entries under: $attempts"
	exit 1
fi

echo $cookie
exit 0