private void StartInVscSession()
{
string sourceVolume = PathHelper.RemoveTrailingSeparator(Path.GetPathRoot(SourceFolder));
_vscSession = new VolumeShadowCopySession();
_vscSession.Error += VscSession_Error;
_vscSession.Ready += VscSession_Ready;
_status.OnEnterNewStage("Preparing...", string.Format("Creating shadow copy of volume {0} ...", PathHelper.Quote(sourceVolume)));
// create and mount the shadow copy
_vscSession.Start(SourceFolder);
_status.IsAbortingSupported = true;
}
private void Main()
{
string sourceFolder = PathHelper.AppendSeparator(_session.SourceFolder); // C:\, C:\Folder\, \\Server\Share\, \\Server\Share\Folder\
string volume = PathHelper.RemoveTrailingSeparator(Path.GetPathRoot(sourceFolder)); // C:, C:, \\Server\Share, \\Server\Share
string pathFromRoot = PathHelper.RemoveTrailingSeparator(sourceFolder.Substring(volume.Length)); // "", \Folder, "", \Folder
if (pathFromRoot.Length == 0)
{
pathFromRoot = null; // null, \Folder, null, \Folder
}
try
{
// helper function throwing an ObjectDisposedException if _disposeEvent is currently signaled
Action CheckForDisposeRequest = () => { if (_disposeEvent.WaitOne(0))
{
throw new ObjectDisposedException("VscThread");
}
};
CheckForDisposeRequest();
_backup = VssUtils.LoadImplementation().CreateVssBackupComponents();
_backup.InitializeForBackup(null);
_backup.SetContext(VssSnapshotContext.Backup);
_backup.SetBackupState(false, false, VssBackupType.Copy, false);
CheckForDisposeRequest();
_backup.GatherWriterMetadata();
CheckForDisposeRequest();
_snapshotSetID = _backup.StartSnapshotSet();
_volumeSnapshotID = _backup.AddToSnapshotSet(PathHelper.AppendSeparator(volume));
CheckForDisposeRequest();
_backup.PrepareForBackup();
VerifyWriterStatus();
CheckForDisposeRequest();
// create the snapshot
_backup.DoSnapshotSet();
VerifyWriterStatus();
// mount the source folder as file share
// (non-persistent shadow copies cannot be mounted locally on a drive or folder)
string shareName = _backup.ExposeSnapshot(_volumeSnapshotID, pathFromRoot,
VssVolumeSnapshotAttributes.ExposedRemotely, null);
_session._mountPoint = @"\\localhost\" + shareName;
CheckForDisposeRequest();
}
catch (ObjectDisposedException) // by CheckForDisposeRequest()
{
Cleanup();
return;
}
catch (Exception e)
{
Cleanup();
string msg = (e is UnauthorizedAccessException
? "You lack the required privileges to create a volume shadow copy.\nPlease restart DeeMirror as administrator."
: "The volume shadow copy could not be created:\n\n" + e.Message);
_session.OnError(msg);
return;
}
// fire the Ready event
try { _session.OnReady(); }
// on unhandled exception by Ready event handler: Cleanup() before rethrowing
catch { Cleanup(); throw; }
// wait for Dispose() signal
_disposeEvent.WaitOne();
Cleanup();
}
