getpagesize.c 1.2 KB

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  1. /* Copyright (C) 1991, 1992, 1995, 1996, 1997 Free Software Foundation, Inc.
  2. This file is part of the GNU C Library.
  3. The GNU C Library is free software; you can redistribute it and/or
  4. modify it under the terms of the GNU Library General Public License as
  5. published by the Free Software Foundation; either version 2 of the
  6. License, or (at your option) any later version.
  7. The GNU C Library is distributed in the hope that it will be useful,
  8. but WITHOUT ANY WARRANTY; without even the implied warranty of
  9. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  10. Library General Public License for more details.
  11. You should have received a copy of the GNU Library General Public
  12. License along with the GNU C Library; see the file COPYING.LIB. If not,
  13. write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  14. Boston, MA 02111-1307, USA. */
  15. #include <unistd.h>
  16. #include <sys/param.h>
  17. /* Return the system page size. */
  18. int getpagesize ()
  19. {
  20. #ifdef EXEC_PAGESIZE
  21. return EXEC_PAGESIZE;
  22. #else /* No EXEC_PAGESIZE. */
  23. #ifdef NBPG
  24. #ifndef CLSIZE
  25. #define CLSIZE 1
  26. #endif /* No CLSIZE. */
  27. return NBPG * CLSIZE;
  28. #else /* No NBPG. */
  29. return NBPC;
  30. #endif /* NBPG. */
  31. #endif /* EXEC_PAGESIZE. */
  32. }