mirror of
git://sourceware.org/git/glibc.git
synced 2024-12-21 04:31:04 +08:00
563c840564
While most arches have had the fdatasync syscall for a long time, the alpha port didn't add it until the 2.6.22 release. This is heavily based on Aurelien Jarno's initial work. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
66 lines
1.7 KiB
C
66 lines
1.7 KiB
C
/* fdatasync -- synchronize at least the data part of a file with
|
|
the underlying media. Linux version.
|
|
|
|
Copyright (C) 2007-2012 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 <bp-checks.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)
|