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glibc/sysdeps/unix/sysv/linux/device-nrs.h
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/* Device numbers of devices used in the implementation. Linux version. | |
Copyright (C) 2000-2016 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
The GNU C Library is free software; you can redistribute it and/or | |
modify it under the terms of the GNU Lesser General Public | |
License as published by the Free Software Foundation; either | |
version 2.1 of the License, or (at your option) any later version. | |
The GNU C Library is distributed in the hope that it will be useful, | |
but WITHOUT ANY WARRANTY; without even the implied warranty of | |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
Lesser General Public License for more details. | |
You should have received a copy of the GNU Lesser General Public | |
License along with the GNU C Library; if not, see | |
<http://www.gnu.org/licenses/>. */ | |
#ifndef _DEVICE_NRS_H | |
#define _DEVICE_NRS_H 1 | |
#include <sys/sysmacros.h> | |
/* /dev/null is (1,3). */ | |
#define DEV_NULL_MAJOR 1 | |
#define DEV_NULL_MINOR 3 | |
/* /dev/full is (1,7). */ | |
#define DEV_FULL_MAJOR 1 | |
#define DEV_FULL_MINOR 7 | |
/* Pseudo tty slaves. For Linux we use the Unix98 ttys. We could | |
also include the old BSD-style tty buts they should not be used and | |
the extra test would only slow down correctly set up systems. If a | |
system still uses those device the slower tests performed (using | |
isatty) will catch it. */ | |
#define DEV_TTY_LOW_MAJOR 136 | |
#define DEV_TTY_HIGH_MAJOR 143 | |
/* Test whether given device is a tty. */ | |
#define DEV_TTY_P(statp) \ | |
({ int __dev_major = major ((statp)->st_rdev); \ | |
__dev_major >= DEV_TTY_LOW_MAJOR && __dev_major <= DEV_TTY_HIGH_MAJOR; }) | |
#endif /* device-nrs.h */ |