login/unlockpt.c

   1 /* Copyright (C) 1998 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Zack Weinberg <zack@rabi.phys.columbia.edu>, 1998.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <stdlib.h>
  21 #include <errno.h>
  22
  23 /* Given a fd on a master pseudoterminal, clear a kernel lock so that
  24    the slave can be opened.  This is to avoid a race between opening the
  25    master and calling grantpt() to take possession of the slave. */
  26 int
  27 unlockpt (fd)
  28      int fd __attribute__ ((unused));
  29 {
  30   __set_errno (ENOSYS);
  31   return -1;
  32 }
  33
  34 stub_warning (unlockpt)
  35 #include <stub-tag.h>