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-rw-r--r--include/sys/sysmacros.h49
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diff --git a/include/sys/sysmacros.h b/include/sys/sysmacros.h
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+/* Definitions of macros to access `dev_t' values.
+ Copyright (C) 1996, 1997, 1999 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 Library General Public License as
+ published by the Free Software Foundation; either version 2 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
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#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. */
+#if defined __GNUC__ && __GNUC__ >= 2
+# define major(dev) ((int)(((dev) >> 8) & 0xff))
+# define minor(dev) ((int)((dev) & 0xff))
+# define makedev(major, minor) ((((unsigned int) (major)) << 8) \
+ | ((unsigned int) (minor)))
+#else
+/* We need to know the word order here. This assumes that the word order
+ is consistent with the byte order. */
+# include <endian.h>
+# if __BYTE_ORDER == __BIG_ENDIAN
+# define major(dev) (((dev).__val[1] >> 8) & 0xff)
+# define minor(dev) ((dev).__val[1] & 0xff)
+# define makedev(major, minor) { 0, ((((unsigned int) (major)) << 8) \
+ | ((unsigned int) (minor))) }
+# else
+# define major(dev) (((dev).__val[0] >> 8) & 0xff)
+# define minor(dev) ((dev).__val[0] & 0xff)
+# define makedev(major, minor) { ((((unsigned int) (major)) << 8) \
+ | ((unsigned int) (minor))), 0 }
+# endif
+#endif
+
+#endif /* sys/sysmacros.h */