1 /* Copyright (C) 1991-2022 Free Software Foundation, Inc. 2 This file is part of the GNU C Library. 3 4 The GNU C Library is free software; you can redistribute it and/or 5 modify it under the terms of the GNU Lesser General Public 6 License as published by the Free Software Foundation; either 7 version 2.1 of the License, or (at your option) any later version. 8 9 The GNU C Library is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 Lesser General Public License for more details. 13 14 You should have received a copy of the GNU Lesser General Public 15 License along with the GNU C Library; if not, see 16 <https://www.gnu.org/licenses/>. */ 17 18 #include <errno.h> 19 #include <unistd.h> 20 #include <hurd.h> 21 #include <hurd/fd.h> 22 #include <sysdep-cancel.h> 23 24 /* Make all changes done to FD actually appear on disk. */ 25 int fsync(int fd)26fsync (int fd) 27 { 28 error_t err; 29 int cancel_oldtype; 30 31 cancel_oldtype = LIBC_CANCEL_ASYNC(); 32 err = HURD_DPORT_USE_CANCEL (fd, __file_sync (port, 1, 0)); 33 LIBC_CANCEL_RESET (cancel_oldtype); 34 if (err) 35 { 36 if (err == EOPNOTSUPP) 37 /* If the file descriptor does not support sync, return EINVAL 38 as POSIX specifies. */ 39 err = EINVAL; 40 return __hurd_dfail (fd, err); 41 } 42 return 0; 43 } 44 libc_hidden_def (fsync) 45