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glibc  2.9
device-nrs.h
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00001 /* Device numbers of devices used in the implementation.  Linux version.
00002    Copyright (C) 2000, 2001, 2005 Free Software Foundation, Inc.
00003    This file is part of the GNU C Library.
00004 
00005    The GNU C Library is free software; you can redistribute it and/or
00006    modify it under the terms of the GNU Lesser General Public
00007    License as published by the Free Software Foundation; either
00008    version 2.1 of the License, or (at your option) any later version.
00009 
00010    The GNU C Library is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013    Lesser General Public License for more details.
00014 
00015    You should have received a copy of the GNU Lesser General Public
00016    License along with the GNU C Library; if not, write to the Free
00017    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00018    02111-1307 USA.  */
00019 
00020 #ifndef _DEVICE_NRS_H
00021 #define _DEVICE_NRS_H       1
00022 
00023 #include <sys/sysmacros.h>
00024 
00025 /* /dev/null is (1,3).  */
00026 #define DEV_NULL_MAJOR      1
00027 #define DEV_NULL_MINOR      3
00028 
00029 /* /dev/full is (1,7).  */
00030 #define DEV_FULL_MAJOR      1
00031 #define DEV_FULL_MINOR      7
00032 
00033 /* Pseudo tty slaves.  For Linux we use the Unix98 ttys.  We could
00034    also include the old BSD-style tty buts they should not be used and
00035    the extra test would only slow down correctly set up systems.  If a
00036    system still uses those device the slower tests performed (using
00037    isatty) will catch it.  */
00038 #define DEV_TTY_LOW_MAJOR   136
00039 #define DEV_TTY_HIGH_MAJOR  143
00040 
00041 /* Test whether given device is a tty.  */
00042 #define DEV_TTY_P(statp) \
00043   ({ int __dev_major = major ((statp)->st_rdev);                     \
00044      __dev_major >= DEV_TTY_LOW_MAJOR && __dev_major <= DEV_TTY_HIGH_MAJOR; })
00045 
00046 #endif /* device-nrs.h */