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65 lines
1.7 KiB
C
65 lines
1.7 KiB
C
/* fdatasync -- synchronize at least the data part of a file with
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the underlying media. Linux version.
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Copyright (C) 2007-2013 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library. If not, see
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<http://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <unistd.h>
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#include <sysdep-cancel.h>
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#include <sys/syscall.h>
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#include <kernel-features.h>
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static int
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do_fdatasync (int fd)
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{
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#ifdef __ASSUME_FDATASYNC
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return INLINE_SYSCALL (fdatasync, 1, fd);
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#elif defined __NR_fdatasync
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static int __have_no_fdatasync;
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if (!__builtin_expect (__have_no_fdatasync, 0))
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{
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int result = INLINE_SYSCALL (fdatasync, 1, fd);
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if (__builtin_expect (result, 0) != -1 || errno != ENOSYS)
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return result;
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__have_no_fdatasync = 1;
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}
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#endif
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return INLINE_SYSCALL (fsync, 1, fd);
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}
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int
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__fdatasync (int fd)
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{
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if (SINGLE_THREAD_P)
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return do_fdatasync (fd);
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int oldtype = LIBC_CANCEL_ASYNC ();
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int result = do_fdatasync (fd);
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LIBC_CANCEL_RESET (oldtype);
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return result;
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}
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weak_alias (__fdatasync, fdatasync)
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