mirror of
https://github.com/libguestfs/libguestfs.git
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122 lines
2.8 KiB
C
122 lines
2.8 KiB
C
/* libguestfs - the guestfsd daemon
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* Copyright (C) 2009-2011 Red Hat Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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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, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <config.h>
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#ifdef HAVE_WINDOWS_H
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#include <windows.h>
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#endif
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#include <stdio.h>
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#include <unistd.h>
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#include "daemon.h"
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#include "actions.h"
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#ifdef WIN32
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static int sync_win32 (void);
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#endif
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int
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do_sync (void)
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{
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if (sync_disks () == -1) {
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reply_with_perror ("sync");
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return -1;
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}
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return 0;
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}
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/* This is a replacement for sync(2) which is called from
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* this file and from other places in the daemon. It works
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* on Windows too.
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*/
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int
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sync_disks (void)
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{
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#if defined(HAVE_SYNC)
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sync ();
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return 0;
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#elif defined(WIN32)
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return sync_win32 ();
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#else
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#error "no known sync() API"
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#endif
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}
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#ifdef WIN32
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static int
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sync_win32 (void)
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{
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DWORD n1, n2;
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n1 = GetLogicalDriveStrings (0, NULL);
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if (n1 == 0)
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return -1;
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TCHAR buffer[n1+2]; /* sic */
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n2 = GetLogicalDriveStrings (n1, buffer);
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if (n2 == 0)
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return -1;
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TCHAR *p = buffer;
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/* The MSDN example code itself assumes that there is always one
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* drive in the system. However we will be better than that and not
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* make the assumption ...
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*/
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while (*p) {
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HANDLE drive;
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DWORD drive_type;
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/* Ignore removable drives. */
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drive_type = GetDriveType (p);
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if (drive_type == DRIVE_FIXED) {
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/* To open the volume you have to specify the volume name, not
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* the mount point. MSDN documents use of the constant 50
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* below.
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*/
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TCHAR volname[50];
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if (!GetVolumeNameForVolumeMountPoint (p, volname, 50))
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return -1;
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drive = CreateFile (volname, GENERIC_READ|GENERIC_WRITE,
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FILE_SHARE_READ|FILE_SHARE_WRITE,
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NULL, OPEN_EXISTING, 0, 0);
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if (drive == INVALID_HANDLE_VALUE)
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return -1;
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BOOL r;
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/* This always fails in Wine:
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* http://bugs.winehq.org/show_bug.cgi?id=14915
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*/
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r = FlushFileBuffers (drive);
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CloseHandle (drive);
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if (!r)
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return -1;
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}
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/* Skip to next \0 character. */
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while (*p++);
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}
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return 0;
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}
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#endif /* WIN32 */
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