| /* Emulate fsync on platforms that lack it, primarily Windows and | |
| cross-compilers like MinGW. | |
| This is derived from sqlite3 sources. | |
| https://www.sqlite.org/src/finfo?name=src/os_win.c | |
| https://www.sqlite.org/copyright.html | |
| Written by Richard W.M. Jones <rjones.at.redhat.com> | |
| Copyright (C) 2008-2023 Free Software Foundation, Inc. | |
| This file 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. | |
| This file 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 this program. If not, see <https://www.gnu.org/licenses/>. */ | |
| /* FlushFileBuffers */ | |
| /* Get _get_osfhandle. */ | |
| int | |
| fsync (int fd) | |
| { | |
| HANDLE h = (HANDLE) _get_osfhandle (fd); | |
| DWORD err; | |
| if (h == INVALID_HANDLE_VALUE) | |
| { | |
| errno = EBADF; | |
| return -1; | |
| } | |
| if (!FlushFileBuffers (h)) | |
| { | |
| /* Translate some Windows errors into rough approximations of Unix | |
| * errors. MSDN is useless as usual - in this case it doesn't | |
| * document the full range of errors. | |
| */ | |
| err = GetLastError (); | |
| switch (err) | |
| { | |
| case ERROR_ACCESS_DENIED: | |
| /* For a read-only handle, fsync should succeed, even though we have | |
| no way to sync the access-time changes. */ | |
| return 0; | |
| /* eg. Trying to fsync a tty. */ | |
| case ERROR_INVALID_HANDLE: | |
| errno = EINVAL; | |
| break; | |
| default: | |
| errno = EIO; | |
| } | |
| return -1; | |
| } | |
| return 0; | |
| } | |