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/*
* ptyint_void_association(): Void association with controlling terminal
*
* Copyright 1995, 1996 by the Massachusetts Institute of Technology.
*
*
* Permission to use, copy, modify, and distribute this software and
* its documentation for any purpose and without fee is hereby
* granted, provided that the above copyright notice appear in all
* copies and that both that copyright notice and this permission
* notice appear in supporting documentation, and that the name of
* M.I.T. not be used in advertising or publicity pertaining to
* distribution of the software without specific, written prior
* permission. Furthermore if you modify this software you must label
* your software as modified software and not distribute it in such a
* fashion that it might be confused with the original M.I.T. software.
* M.I.T. makes no representations about the suitability
* of this software for any purpose. It is provided "as is" without
* express or implied warranty.
*
*/
#include <com_err.h>
#include "libpty.h"
#include "pty-int.h"
/*
* This routine will be called twice. It's not particularly important
* that the setsid() or TIOCSTTY ioctls succeed (they may not the
* second time), but rather that we have a controlling terminal at the
* end. It is assumed that vhangup doesn't exist and confuse the
* process's notion of controlling terminal on any system without
* TIOCNOTTY. That is, either vhangup() leaves the controlling
* terminal in tact, breaks the association completely, or the system
* provides TIOCNOTTY to get things back into a reasonable state. In
* practice, vhangup() either breaks the association completely or
* doesn't effect controlling terminals, so this condition is met.
*/
long ptyint_void_association()
{
int con_fd;
#ifdef HAVE_SETSID
(void) setsid();
#endif
/* Void tty association first */
#ifdef TIOCNOTTY
if ((con_fd = open("/dev/tty", O_RDWR)) >= 0) {
ioctl(con_fd, TIOCNOTTY, 0);
close(con_fd);
}
#endif
return 0;
}
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