sysmacros.h 1.2 KB

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  1. /* Definitions of macros to access `dev_t' values.
  2. Copyright (C) 1996, 1997, 1999 Free Software Foundation, Inc.
  3. This file is part of the GNU C Library.
  4. The GNU C Library is free software; you can redistribute it and/or
  5. modify it under the terms of the GNU Lesser General Public
  6. License as published by the Free Software Foundation; either
  7. version 2.1 of the License, or (at your option) any later version.
  8. The GNU C Library is distributed in the hope that it will be useful,
  9. but WITHOUT ANY WARRANTY; without even the implied warranty of
  10. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  11. Lesser General Public License for more details.
  12. You should have received a copy of the GNU Lesser General Public
  13. License along with the GNU C Library; if not, write to the Free
  14. Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  15. 02111-1307 USA. */
  16. #ifndef _SYS_SYSMACROS_H
  17. #define _SYS_SYSMACROS_H 1
  18. /* For compatibility we provide alternative names. */
  19. #define major(dev) ((int)(((dev) >> 8) & 0xff))
  20. #define minor(dev) ((int)((dev) & 0xff))
  21. #define makedev(major, minor) ((((unsigned int) (major)) << 8) \
  22. | ((unsigned int) (minor)))
  23. #endif /* sys/sysmacros.h */