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From: x-window@uni-paderborn.de (X-Window Betreuung)
Newsgroups: comp.windows.x
Subject: Re: Xterm console window problems
Message-ID: <X-WINDOW.91Jun4102927@athene.uni-paderborn.de>
Date: 4 Jun 91 10:29:27 GMT
References: <1991Jun3.125642.11785@vaxa.strath.ac.uk>
Sender: news@uni-paderborn.de (News Uni-Paderborn)
Organization: Uni Paderborn FB 17 Informatik GERMANY
Lines: 120
In-Reply-To: craa79@vaxa.strath.ac.uk's message of 3 Jun 91 12:56:42 GMT
Nntp-Posting-Host: athene

In article <1991Jun3.125642.11785@vaxa.strath.ac.uk> craa79@vaxa.strath.ac.uk (Bruce Rodger.) writes:

   Problem:

   rlogin to a sun (3/80, running sunos 4.0.3), and start up an Xterm console
   window. 

   The normal console (NOT running a window system) gets grabbed - if a user
   is logged onto the console, the user who started the xterm gets BOTH sessions
   connected to the xterm.

   If the Xterm is now killed, control is NOT returned to the console - the only
   solution is to reboot......

   Any solutions ?

Here's a little program I wrote a few months ago to solve this very
problem - it occured here often, when X got killed and didn't clean up
right, especially on our SLC's. I added the program as the last client
in the .xstartrc, and now there are no more problems. Ok, here it is.

--------------- snip snip ---------------------------

 /* program: kbd_recover                                        */
 /* purpose: recovers the console after dirty exits of X        */
 /* usage:   kbd_recover -force (option to prevent calling this */
 /*          program accidentially)                             */

#include <sys/types.h>
#include <sys/stat.h>
#include <sys/file.h>
#include <sys/ioctl.h>
#include <sundev/kbio.h>
#include <sundev/kbd.h>
#include <stdio.h>
#include <strings.h>

extern int stat(), geteuid(), getegid();
extern int open();
extern void close();
extern int ioctl();
extern void fprintf();
extern void exit();

static void die(), usage();


void
main (argc, argv)
     int argc;
     char *argv[];
{
  int kbd_fd;
  int translate;
  struct stat buf;
  int tmp=0;
  short uid;
  
  
  argc--;
  argv++;
  if (argc-- && **argv == '-')
    ++*argv;
  else
    usage();
  
  if (stat("/dev/console", &buf) != 0)
    die ("Couldn't find /dev/console.");
  
  uid = buf.st_uid;
  if (((short) geteuid() != uid) &&  /* not owner of console */
      (geteuid()  != 0 ))            /* no root */
    {
      die("Only the owner of /dev/console or root is allowed to run this program");
    }
  
  
  if (strcmp(*argv,"force")!=0)
    usage();
  
  if ((kbd_fd = open ("/dev/kbd", O_RDWR, 0)) < 0)
    die("Couldn't open /dev/kbd");
  
  translate = TR_ASCII;
  
  if (ioctl(kbd_fd, KIOCTRANS, (caddr_t) &translate))
    die("Couldn't initialize translation to Event");
  
  if (ioctl (kbd_fd, KIOCSDIRECT, (caddr_t) &tmp))
    die("Couldn't recover console");
  
  close( kbd_fd );
  exit(0);
}

static void
die(msg)
     char        *msg;
{
  fprintf(stderr, "%s\n", msg);
  exit(1);
}

static void
usage()
{
  fprintf(stderr, "Usage: kbd_recover -force\n");
  fprintf(stderr, "\tRecovers the console after dirty exits of Xsun\n");
  fprintf(stderr, "\tWarning! Calling this program from within X11\n");
  fprintf(stderr, "\twill kill your Server!\n");
  exit(1);
}

------------- snip snip ----------------

Hope this helps.
Regards, Swen
--

---->  Swen Thuemmler  *  X-Betreuung  *  <swen@uni-paderborn.de>  <----