sysdeps/unix/sysv/linux/bits/errno.h

   1 /* Error constants.  Linux specific version.
   2    Copyright (C) 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #ifdef _ERRNO_H
  21
  22 # undef EDOM
  23 # undef EILSEQ
  24 # undef ERANGE
  25 # include <linux/errno.h>
  26
  27 /* Linux has no ENOTSUP error code.  */
  28 # define ENOTSUP EOPNOTSUPP
  29
  30 /* Linux also had no ECANCELED error code.  Since it is not used here
  31    we define it to an invalid value.  */
  32 # ifndef ECANCELED
  33 #  define ECANCELED     125
  34 # endif
  35
  36 # ifndef __ASSEMBLER__
  37 /* Function to get address of global `errno' variable.  */
  38 extern int *__errno_location (void) __THROW __attribute__ ((__const__));
  39
  40 #  if !defined _LIBC || defined _LIBC_REENTRANT
  41 /* When using threads, errno is a per-thread value.  */
  42 #   define errno (*__errno_location ())
  43 #  endif
  44 # endif /* !__ASSEMBLER__ */
  45 #endif /* _ERRNO_H */
  46
  47 #if !defined _ERRNO_H && defined __need_Emath
  48 /* This is ugly but the kernel header is not clean enough.  We must
  49    define only the values EDOM, EILSEQ and ERANGE in case __need_Emath is
  50    defined.  */
  51 # define EDOM   33      /* Math argument out of domain of function.  */
  52 # define EILSEQ 84      /* Illegal byte sequence.  */
  53 # define ERANGE 34      /* Math result not representable.  */
  54 #endif /* !_ERRNO_H && __need_Emath */