login/ptsname.c

   1 /* Copyright (C) 1998-2017 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, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <errno.h>
  20 #include <stdlib.h>
  21 #include <unistd.h>
  22
  23 /* Given the file descriptor of a master pty, return the pathname
  24    of the associated slave. */
  25
  26 char *
  27 ptsname (int fd __attribute__ ((unused)))
  28 {
  29   __set_errno (ENOSYS);
  30   return NULL;
  31 }
  32
  33 int
  34 __ptsname_r (int fd __attribute__ ((unused)),
  35              char *buf __attribute__ ((unused)),
  36              size_t len __attribute__ ((unused)))
  37 {
  38   __set_errno (ENOSYS);
  39   return ENOSYS;
  40 }
  41 weak_alias (__ptsname_r, ptsname_r)
  42
  43 stub_warning(ptsname)
  44 stub_warning(ptsname_r)