mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-12-18 10:16:51 +00:00
79f15092b9
This incorporates:
2018-05-21 crypto: omit stream ops Emacs doesn’t need
2018-05-13 truncate: Fix compilation error on Android
2018-05-13 imaxdiv: Fix compilation error on Android
2018-05-13 Support selective inclusion of recent mingw.org headers
2018-05-13 Add cross-compilation guesses for Linux systems sans glibc
2018-05-13 stdioext: Fix compilation errors with newer Android headers
2018-05-07 af_alg: Pacify --enable-gcc-warnings
2018-05-06 af_alg: Fix bug with streams that are not at position 0
2018-05-06 Followup to 'af_alg: New module'
2018-05-05 crypto/{md5,sha1,sha256,sha512}: simplify
2018-05-05 af_alg: New module
2018-05-05 af_alg: Improve function signature
2018-04-28 md5sum: Use AF_ALG when available
2018-04-28 sha512sum: Use AF_ALG when available
2018-04-28 sha256sum: Use AF_ALG when available
2018-04-28 sha1sum: Use AF_ALG when available
2018-05-05 all: Replace more http URLs by https URLs
2018-05-03 maint: port more modules to GCC 8
2018-05-03 Simplify code; drop support for Borland C++ on Windows
* admin/merge-gnulib (GNULIB_MODULES): Use crypto/md5-buffer
rather than crypto/md5, since Emacs doesn’t use the stream
operations that in recent Gnulib pull in other stuff Emacs doesn’t
need. Similarly for crypto/sha1-buffer, crypto/sha256-buffer,
crypto/sha512-buffer.
* build-aux/config.guess, build-aux/config.sub, lib/dosname.h:
* lib/dup2.c, lib/errno.in.h, lib/euidaccess.c, lib/fcntl.c:
* lib/fcntl.in.h, lib/fpending.c, lib/fsync.c, lib/getdtablesize.c:
* lib/getopt.c, lib/gettimeofday.c, lib/inttypes.in.h, lib/md5.c:
* lib/md5.h, lib/open.c, lib/pipe2.c, lib/putenv.c, lib/sha1.c:
* lib/sha1.h, lib/sha256.c, lib/sha256.h, lib/sha512.c:
* lib/sha512.h, lib/stat-time.h, lib/stdio-impl.h, lib/stdio.in.h:
* lib/stdlib.in.h, lib/sys_stat.in.h, lib/sys_types.in.h:
* lib/timespec.h, lib/unistd.in.h, lib/utimens.c, m4/c-strtod.m4:
* m4/gnulib-common.m4, m4/inttypes.m4, m4/lstat.m4, m4/nocrash.m4:
* m4/pselect.m4, m4/readlink.m4, m4/stdio_h.m4, m4/symlink.m4:
* m4/unistd_h.m4, m4/utimens.m4:
Copy from Gnulib.
* lib/gnulib.mk.in, m4/gnulib-comp.m4: Regenerate.
88 lines
2.3 KiB
C
88 lines
2.3 KiB
C
/* Emulate fsync on platforms that lack it, primarily Windows and
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cross-compilers like MinGW.
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This is derived from sqlite3 sources.
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https://www.sqlite.org/src/finfo?name=src/os_win.c
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https://www.sqlite.org/copyright.html
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Written by Richard W.M. Jones <rjones.at.redhat.com>
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Copyright (C) 2008-2018 Free Software Foundation, Inc.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public
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License as published by the Free Software Foundation; either
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version 3 of the License, or (at your option) any later version.
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This 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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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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#include <config.h>
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#include <unistd.h>
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#if defined _WIN32 && ! defined __CYGWIN__
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/* FlushFileBuffers */
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# define WIN32_LEAN_AND_MEAN
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# include <windows.h>
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# include <errno.h>
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/* Get _get_osfhandle. */
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# if GNULIB_MSVC_NOTHROW
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# include "msvc-nothrow.h"
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# else
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# include <io.h>
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# endif
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int
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fsync (int fd)
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{
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HANDLE h = (HANDLE) _get_osfhandle (fd);
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DWORD err;
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if (h == INVALID_HANDLE_VALUE)
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{
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errno = EBADF;
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return -1;
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}
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if (!FlushFileBuffers (h))
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{
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/* Translate some Windows errors into rough approximations of Unix
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* errors. MSDN is useless as usual - in this case it doesn't
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* document the full range of errors.
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*/
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err = GetLastError ();
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switch (err)
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{
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case ERROR_ACCESS_DENIED:
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/* For a read-only handle, fsync should succeed, even though we have
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no way to sync the access-time changes. */
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return 0;
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/* eg. Trying to fsync a tty. */
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case ERROR_INVALID_HANDLE:
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errno = EINVAL;
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break;
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default:
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errno = EIO;
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}
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return -1;
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}
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return 0;
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}
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#else /* !Windows */
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# error "This platform lacks fsync function, and Gnulib doesn't provide a replacement. This is a bug in Gnulib."
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#endif /* !Windows */
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