errno.h 2.3 KB

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  1. /* Error constants. Linux specific version.
  2. Copyright (C) 1996, 1997, 1998 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 Library General Public License as
  6. published by the Free Software Foundation; either version 2 of the
  7. 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. Library General Public License for more details.
  12. You should have received a copy of the GNU Library General Public
  13. License along with the GNU C Library; see the file COPYING.LIB. If not,
  14. write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  15. Boston, MA 02111-1307, USA. */
  16. #ifdef _ERRNO_H
  17. # undef EDOM
  18. # undef EILSEQ
  19. # undef ERANGE
  20. # include <linux/errno.h>
  21. __BEGIN_DECLS
  22. /* Linux has no ENOTSUP error code. */
  23. # define ENOTSUP EOPNOTSUPP
  24. /* Linux also has no ECANCELED error code. Since it is not used here
  25. we define it to an invalid value. */
  26. # define ECANCELED 125
  27. # ifndef __ASSEMBLER__
  28. /* We now need a declaration of the `errno' variable. */
  29. extern int errno;
  30. /* Function to get address of global `errno' variable. */
  31. extern int *__errno_location __P ((void)) __attribute__ ((__const__));
  32. # if defined _LIBC
  33. /* We wouldn't need a special macro anymore but it is history. */
  34. # define __set_errno(val) (*__errno_location ()) = (val)
  35. # endif /* _LIBC */
  36. # if !defined _LIBC || defined _LIBC_REENTRANT
  37. /* When using threads, errno is a per-thread value. */
  38. # define errno (*__errno_location ())
  39. # endif
  40. # endif /* !__ASSEMBLER__ */
  41. #endif /* _ERRNO_H */
  42. #if !defined _ERRNO_H && defined __need_Emath
  43. /* This is ugly but the kernel header is not clean enough. We must
  44. define only the values EDOM and ERANGE in case __need_Emath is
  45. defined. The value is the same for all Linux ports. */
  46. # define EDOM 33 /* Math argument out of domain of function. */
  47. # define EILSEQ 84 /* Illegal byte sequence. */
  48. # define ERANGE 34 /* Math result not representable. */
  49. #endif /* !_ERRNO_H && __need_Emath */
  50. __END_DECLS