Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!cornell!uw-beaver!ubc-cs!alberta!myrias!brb
From: brb@myrias.com (Brian Baird)
Newsgroups: comp.windows.x
Subject: Re: automatically setting DISPLAY variable
Message-ID: <c6mlf25j@myrias.com>
Date: 26 Aug 90 03:36:50 GMT
References: <9008242049.AA12394@bach.cs.byu.edu>
Organization: Myrias Research, Edmonton
Lines: 45

Thomas McNeill <thomas@BACH.CS.BYU.EDU> provides a Csh script, C
program combination to set the DISPLAY environment variable from a
Csh .login.  Unfortunately, the directions are incorrect.  DISPLAY
will be set for the "setdisplay" script, but not for the parent shell.

Here's my (somewhat simpler) version.

: sh this file
echo >whatdisplay <<\EOF
#! /bin/sh
# whatdisplay: which X display am I running from?
#
# 90 08 25	Brian Baird, Myrias Research, Edmonton
#		<brb@myrias.com>
#
# Make this script executable, place it in some directory in your
# PATH, and, depending on your shell, add the following line to the
# named file on each machine you rlogin to.  This script doesn't
# handle nested rlogins.
#
# Shell		File		Line
# -----		----		----
# csh		.login		setenv DISPLAY `whatdisplay`
# sh		.profile	DISPLAY=`whatdisplay`; 	export DISPLAY
# bash		.bash_login	export DISPLAY=`whatdisplay`

case $DISPLAY in
"")	;;
*)	echo "$DISPLAY"		# display already set
	exit 0 ;;
esac

HOST=`who am i | sed 's/.*(\(.*\)).*/\1/'`

case "$HOST" in
"")	echo ":0" ;;		# local host
*:*)	echo "$HOST" ;;		# remote host includes display
*)	echo "$HOST:0" ;;	# simple remote host
esac
EOF
exit

--
Brian Baird				brb@myrias.com
Myrias Research, Edmonton		{uunet,alberta}!myrias!brb