glibc/login/unlockpt.c

34 lines
1.2 KiB
C

/* Copyright (C) 1998-2013 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Zack Weinberg <zack@rabi.phys.columbia.edu>, 1998.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <stdlib.h>
#include <errno.h>
/* Given a fd on a master pseudoterminal, clear a kernel lock so that
the slave can be opened. This is to avoid a race between opening the
master and calling grantpt() to take possession of the slave. */
int
unlockpt (fd)
int fd __attribute__ ((unused));
{
__set_errno (ENOSYS);
return -1;
}
stub_warning (unlockpt)