Mercurial > gnulib
view lib/fsync.c @ 40190:ef116535bf1a
relocatable-prog: Use $ORIGIN trick on more platforms.
* m4/relocatable.m4 (gl_RELOCATABLE_BODY): Use $ORIGIN trick also on
FreeBSD >= 7.3, DragonFly >= 3.0, NetBSD >= 8.0, OpenBSD >= 5.4,
Solaris >= 10, Haiku. But don't use it on Android.
* build-aux/reloc-ldflags: Allow the use of the $ORIGIN trick also on
Hurd, FreeBSD, DragonFly, NetBSD, OpenBSD, Solaris, Haiku.
author | Bruno Haible <bruno@clisp.org> |
---|---|
date | Wed, 20 Feb 2019 02:39:52 +0100 |
parents | b06060465f09 |
children |
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/* 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) 2008-2019 Free Software Foundation, Inc. This 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. This 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 General Public License along with this program. If not, see <https://www.gnu.org/licenses/>. */ #include <config.h> #include <unistd.h> #if defined _WIN32 && ! defined __CYGWIN__ /* FlushFileBuffers */ # define WIN32_LEAN_AND_MEAN # include <windows.h> # include <errno.h> /* Get _get_osfhandle. */ # if GNULIB_MSVC_NOTHROW # include "msvc-nothrow.h" # else # include <io.h> # endif 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; } #else /* !Windows */ # error "This platform lacks fsync function, and Gnulib doesn't provide a replacement. This is a bug in Gnulib." #endif /* !Windows */