sysdeps/unix/sysv/linux/pty-private.h

   1 /* Internal defenitions and declarations for pseudo terminal functions.
   2    Copyright (C) 1998, 1999 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Zack Weinberg <zack@rabi.phys.columbia.edu>, 1998.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Library General Public License as
   8    published by the Free Software Foundation; either version 2 of the
   9    License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Library General Public License for more details.
  15
  16    You should have received a copy of the GNU Library General Public
  17    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  18    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #ifndef _PTY_PRIVATE_H
  22 #define _PTY_PRIVATE_H 1
  23
  24 /* The group slave pseudo terminals belong to.  */
  25 #define TTY_GROUP "tty"
  26
  27 /* The file descriptor connected to the master pseudo terminal.  */
  28 #define PTY_FILENO 3
  29
  30 /* Path to the helper program that implements `grantpt' in user space.  */
  31 #define _PATH_PT_CHOWN LIBEXECDIR "/pt_chown"
  32
  33 /* Test whether given TTY is really a Unix98 pseudo terminal.  */
  34 #define unix98_pseudo_p(Dev) ((Dev) >= 136 && (Dev) <= 143)
  35
  36 /* Exit codes for the helper program.  */
  37 enum  /* failure modes */
  38 {
  39   FAIL_EBADF = 1,
  40   FAIL_EINVAL,
  41   FAIL_EACCES,
  42   FAIL_EXEC
  43 };
  44
  45 #endif /* pty-private.h  */