sysdeps/unix/sysv/linux/device-nrs.h

   1 /* Device numbers of devices used in the implementation.  Linux version.
   2    Copyright (C) 2000, 2001, 2005 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   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 #ifndef _DEVICE_NRS_H
  21 #define _DEVICE_NRS_H   1
  22
  23 #include <sys/sysmacros.h>
  24
  25 /* /dev/null is (1,3).  */
  26 #define DEV_NULL_MAJOR  1
  27 #define DEV_NULL_MINOR  3
  28
  29 /* /dev/full is (1,7).  */
  30 #define DEV_FULL_MAJOR  1
  31 #define DEV_FULL_MINOR  7
  32
  33 /* Pseudo tty slaves.  For Linux we use the Unix98 ttys.  We could
  34    also include the old BSD-style tty buts they should not be used and
  35    the extra test would only slow down correctly set up systems.  If a
  36    system still uses those device the slower tests performed (using
  37    isatty) will catch it.  */
  38 #define DEV_TTY_LOW_MAJOR       136
  39 #define DEV_TTY_HIGH_MAJOR      143
  40
  41 /* Test whether given device is a tty.  */
  42 #define DEV_TTY_P(statp) \
  43   ({ int __dev_major = major ((statp)->st_rdev);                              \
  44      __dev_major >= DEV_TTY_LOW_MAJOR && __dev_major <= DEV_TTY_HIGH_MAJOR; })
  45
  46 #endif  /* device-nrs.h */