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/* fdatasync -- synchronize at least the data part of a file with
the underlying media. Linux version.
Copyright (C) 2007-2015 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library 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 2.1 of the License, or (at your option) any later version.
The GNU C Library 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 the GNU C Library. If not, see
<http://www.gnu.org/licenses/>. */
#include <errno.h>
#include <unistd.h>
#include <sysdep-cancel.h>
#include <sys/syscall.h>
#include <kernel-features.h>
static int
do_fdatasync (int fd)
{
#ifdef __ASSUME_FDATASYNC
return INLINE_SYSCALL (fdatasync, 1, fd);
#elif defined __NR_fdatasync
static int __have_no_fdatasync;
if (!__builtin_expect (__have_no_fdatasync, 0))
{
int result = INLINE_SYSCALL (fdatasync, 1, fd);
if (__builtin_expect (result, 0) != -1 || errno != ENOSYS)
return result;
__have_no_fdatasync = 1;
}
#endif
return INLINE_SYSCALL (fsync, 1, fd);
}
int
__fdatasync (int fd)
{
if (SINGLE_THREAD_P)
return do_fdatasync (fd);
int oldtype = LIBC_CANCEL_ASYNC ();
int result = do_fdatasync (fd);
LIBC_CANCEL_RESET (oldtype);
return result;
}
weak_alias (__fdatasync, fdatasync)
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