mirror of
https://github.com/libguestfs/libguestfs.git
synced 2026-03-22 07:03:38 +00:00
5ce759bfdc
Remove some debug messages which were basically left over from when the code was being developed. However we leave debug messages where it is printing an external command that is about to be executed, since those are useful.
140 lines
3.1 KiB
C
140 lines
3.1 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., 675 Mass Ave, Cambridge, MA 02139, 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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/* Older versions of libguestfs used to issue separate 'umount_all'
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* and 'sync' commands just before closing the handle. Since
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* libguestfs 1.9.7 the library issues this 'internal_autosync'
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* internal operation instead, allowing more control in the daemon.
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*/
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int
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do_internal_autosync (void)
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{
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int r = 0;
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if (autosync_umount)
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r = do_umount_all ();
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sync_disks ();
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return r;
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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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