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/*
* libexplain - Explain errno values returned by libc functions
* Copyright (C) 2008-2013 Peter Miller
* Written by Peter Miller <pmiller@opensource.org.au>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 3 of the License, or (at
* your option) any later version.
*
* This program 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef LIBEXPLAIN_AC_FCNTL_H
#define LIBEXPLAIN_AC_FCNTL_H
/**
* @file
* @brief Insulate <fcntl.h> differences
*/
#include <libexplain/config.h>
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#else
#include <libexplain/ac/sys/file.h>
#endif
#ifndef O_BINARY
#define O_BINARY 0
#endif
#ifndef O_TEXT
#define O_TEXT 0
#endif
/*
* Needed for explain_buffer_errno_path_resolution
*/
#ifndef O_DIRECTORY
#define O_DIRECTORY 0x40000000 /* or O_RDONLY */
#endif
#ifndef O_NOFOLLOW
#define O_NOFOLLOW 0
#endif
/*
* On 64-bit linux, fcntl(F_GETFL) always returns O_LARGEFILE even if we don't
* request it. Unfortunately glibc does not expose this value so we have to
* handle it ourselves. Also the value changes across arches *sigh*.
*
* These values were taken from the asm/fcntl.h kernel header for each arch.
* We can't include this header because it conflicts with glibc's fcntl.h.
*/
#if defined(__linux__) && (O_LARGEFILE == 0)
# if defined(__aarch64__) || defined(__alpha__)
# define O_LARGEFILE_HIDDEN 0400000
# elif defined(__mips64)
# define O_LARGEFILE_HIDDEN 0x2000
# elif defined(__PPC64__)
# define O_LARGEFILE_HIDDEN 0200000
# elif defined(__sparc__) && defined(__arch64__)
# define O_LARGEFILE_HIDDEN 0x40000
# else
# define O_LARGEFILE_HIDDEN 0100000
# endif
#endif
/*
* From /usr/include/sharutils/fcntl.h ...
*
* Work around a bug in Solaris 9 and 10: AT_FDCWD is positive.
* Its value exceeds INT_MAX, so its use as an int doesn't conform to
* the C standard, and GCC and Sun C complain in some cases. If the
* bug is present, undef AT_FDCWD here, so it can be redefined.
*/
#if 0 < AT_FDCWD && AT_FDCWD == 0xffd19553
#undef AT_FDCWD
/*
* Use the same bit pattern as Solaris 9, but with the proper signedness.
* The bit pattern is important, in case this actually is Solaris with
* the above workaround.
*/
#define AT_FDCWD (-3041965)
#endif
/* vim: set ts=8 sw=4 et : */
#endif /* LIBEXPLAIN_AC_FCNTL_H */
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