/* Definitions of macros to access `dev_t' values. Copyright (C) 1996-2016 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 . */ #ifndef _SYS_SYSMACROS_H #define _SYS_SYSMACROS_H 1 /* For compatibility we provide alternative names. The problem here is that compilers other than GCC probably don't have the `long long' type and so `dev_t' is actually an array. */ #define major(dev) ((int)(((unsigned int) (dev) >> 8) & 0xff)) #define minor(dev) ((int)((dev) & 0xff)) #define makedev(major, minor) (((major) << 8) | (minor)) #endif /* sys/sysmacros.h */