patch for support for xterm -C on sgi

[Sjoerd Mullender]

I have made a change to xterm to get support for the -C flag on SGI
systems.  If xterm is given the -C flag, it acts as a console window,
like "wsh -Z3".
I should add that I made these changes not knowing how things worked.  I
tried it, and it seems to work.  I get all console messages in my
console xterm.  It has been running like this for a few months now, both
under Irix 3.3.1 and 3.3.2.
The diffs are based on a fully patched X11R4 xterm (MIT patch 18, 3
unofficial patches for X11 on SGI from Jim Helman <jim at kaos.stanford.edu>).
I should also emphasize that these patches are unofficial.

Some extra remarks.  The DISPLAY variable must point to the local
system.  To be more precise, the DISPLAY variable must start with a
colon.  If it doesn't, the -C flag is silently ignored.

I have also defined HAS_BSD_GROUPS.  This means that the shell that is
started is member of multiple groups (no need to use multgrps or
newgrp).

Anyway, enjoy.

*** main.c-	Thu Dec  6 14:15:16 1990
--- main.c	Tue Feb  5 15:09:15 1991
***************
*** 94,99 ****
--- 94,102 ----
  #define HAS_BSD_GROUPS
  #include <sys/ptyio.h>
  #endif
+ #ifdef sgi
+ #define HAS_BSD_GROUPS
+ #endif
  #endif /* SYSV */
  
  #ifndef SYSV				/* BSD systems */
***************
*** 299,307 ****
  static int inhibit;
  static char passedPty[2];	/* name if pty if slave */
  
! #ifdef TIOCCONS
  static int Console;
! #endif	/* TIOCCONS */
  #ifndef USE_SYSV_UTMP
  static int tslot;
  #endif	/* USE_SYSV_UTMP */
--- 302,310 ----
  static int inhibit;
  static char passedPty[2];	/* name if pty if slave */
  
! #if defined(TIOCCONS) || defined(sgi)
  static int Console;
! #endif	/* TIOCCONS || sgi */
  #ifndef USE_SYSV_UTMP
  static int tslot;
  #endif	/* USE_SYSV_UTMP */
***************
*** 719,727 ****
  		Help ();
  		/* NOTREACHED */
  	     case 'C':
! #ifdef TIOCCONS
  		Console = TRUE;
! #endif	/* TIOCCONS */
  		continue;
  	     case 'S':
  		sscanf(*argv + 2, "%c%c%d", passedPty, passedPty+1,
--- 722,730 ----
  		Help ();
  		/* NOTREACHED */
  	     case 'C':
! #if defined(TIOCCONS) || defined(sgi)
  		Console = TRUE;
! #endif	/* TIOCCONS || sgi */
  		continue;
  	     case 'S':
  		sscanf(*argv + 2, "%c%c%d", passedPty, passedPty+1,
***************
*** 934,946 ****
  
  #	define     minor(x)        ((int)((x)&0377)) /* from MIPS sys/types.h */
  	struct stat fstat_buf;
  
! 	*pty = open ("/dev/ptc", O_RDWR);
! 	if (*pty < 0 || (fstat (*pty, &fstat_buf)) < 0) {
! 	  return(1);
  	}
- 	sprintf (ttydev, "/dev/ttyq%d", minor(fstat_buf.st_rdev));
- 	sprintf (ptydev, "/dev/ptyq%d", minor(fstat_buf.st_rdev));
  	/* got one! */
  	return(0);
  #else /* not sgi */
--- 937,958 ----
  
  #	define     minor(x)        ((int)((x)&0377)) /* from MIPS sys/types.h */
  	struct stat fstat_buf;
+ 	register TScreen *screen = &term->screen;
  
! 	/* only allow console to be on local system.  -sjoerd */
! 	if (Console && *XDisplayString(screen->display) != ':')
! 		Console = 0;
! 	if (Console && (*pty = open ("/dev/grconc", O_RDWR)) >= 0) {
! 		strcpy (ttydev, "/dev/grcons");
! 		strcpy (ptydev, "/dev/grconc");
! 	} else {
! 		*pty = open ("/dev/ptc", O_RDWR);
! 		if (*pty < 0 || (fstat (*pty, &fstat_buf)) < 0) {
! 		  return(1);
! 		}
! 		sprintf (ttydev, "/dev/ttyq%d", minor(fstat_buf.st_rdev));
! 		sprintf (ptydev, "/dev/ptyq%d", minor(fstat_buf.st_rdev));
  	}
  	/* got one! */
  	return(0);
  #else /* not sgi */

-- 
Sjoerd Mullender
CWI, dept. CST, Kruislaan 413, 1098 SJ Amsterdam, Netherlands
email: sjoerd at cwi.nl			fax:   +31 20 592 4199
phone: +31 20 592 4132			telex: 12571 mactr nl