| /* fdatasync -- synchronize at least the data part of a file with |
| the underlying media. Linux version. |
| |
| Copyright (C) 2007-2014 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) |
