Path: utzoo!attcan!uunet!convex!killer!tness7!bellcore!faline!thumper!ulysses!andante!alice!bst
From: bst@alice.UUCP
Newsgroups: comp.windows.x
Subject: Re: xterm problems with SunOS 4.0
Message-ID: <8053@alice.UUCP>
Date: 21 Jul 88 17:15:17 GMT
References: <4328@ut-emx.UUCP> <PINKAS.88Jul20174325@happy.intel.com>
Reply-To: bst@alice.UUCP (PUT YOUR NAME HERE)
Organization: AT&T Bell Laboratories, Murray Hill NJ
Lines: 73

Since I'm sure a lot of people are going to be hitting this problem as
they move to SUN OS4.0, here is copy of a bug report I sent to xbugs a few
weeks back.  This fix I've given here is not the most elegant possible, but
it works.

VERSION:
	X11 release 2

CLIENT MACHINE:
	Sun 3/110

CLIENT OPERATING SYSTEM:
	SunOS 4.0

SYNOPSIS:
	xterm does not work under SUN OS 4.0 on a yellow pages client.

DESCRIPTION:
	xterm dies with a HANGUP message when run under OS4.0.  The problem
	only occurs when running on a YP client.  The new OS now keeps a
	file descriptor open that is a socket connected to the yp server.
	This reduces the overhead in making YP calls.  Xterm, however,
	assumes that it knowns about all open file descriptors and manually
	dups the pseudo-tty fds into file descriptors 4 and 5.  Since 4
	ends up being the YP socket, this hopelessly confuses the YP
	routines.


FIX:

	Diffs for xterm/main.c


920,921c919,920
< 		if (screen->respond < 3) {
< 			int newrespond = dupHigh (screen->respond);
---
> 		if (screen->respond != Xsocket + 1) {
> 			dup2 (screen->respond, Xsocket + 1);
923c922
< 			screen->respond = newrespond;
---
> 			screen->respond = Xsocket + 1;
932,933c931,932
< 		if (tty < 3) {
< 			int newtty = dupHigh (tty);
---
> 		if (tty != Xsocket + 2)	{
> 			dup2 (tty, Xsocket + 2);
935c934
< 			tty = newtty;
---
> 			tty = Xsocket + 2;
1476,1494d1474
< }
< 
< int dupHigh(oldfd)
< {
<     int desc[3],i,j;
<     /* Find an fd > 2 */
<     for (i=0;i<3;i++) {
< 	desc[i] = dup(oldfd);
< 	if (desc[i] > 2)
< 	    break;
< 	}
<     if (i==3) {
< 	fprintf(stderr,"dupHigh failed\n");
< 	exit(1);
< 	}
<     /* Close unneeded ones */
<     for (j=0;j<i;j++)
< 	close(desc[j]);
<     return  desc[i];