public override VirtualDisk CreateDifferencingDisk(string path)
{
using (VirtualDisk disk = OpenDisk())
{
return(disk.CreateDifferencingDisk(path));
}
}
public override VirtualDisk CreateDifferencingDisk(DiscFileSystem fileSystem, string path)
{
using (VirtualDisk disk = OpenDisk())
{
return(disk.CreateDifferencingDisk(fileSystem, path));
}
}
private void CreateDiffDisk()
{
string child;
PSObject parentObj = ResolveNewDiskPath(out child);
PSObject baseDiskObj = SessionState.InvokeProvider.Item.Get(new string[] { BaseDisk }, false, true)[0];
VirtualDisk baseDisk = null;
try
{
if (baseDiskObj.BaseObject is FileInfo)
{
baseDisk = VirtualDisk.OpenDisk(((FileInfo)baseDiskObj.BaseObject).FullName, FileAccess.Read);
}
else if (baseDiskObj.BaseObject is DiscFileInfo)
{
DiscFileInfo dfi = (DiscFileInfo)baseDiskObj.BaseObject;
baseDisk = VirtualDisk.OpenDisk(dfi.FileSystem, dfi.FullName, FileAccess.Read);
}
else
{
WriteError(new ErrorRecord(
new FileNotFoundException("The file specified by the BaseDisk parameter doesn't exist"),
"BadBaseDiskLocation",
ErrorCategory.InvalidArgument,
null));
return;
}
VirtualDisk newDisk = null;
if (parentObj.BaseObject is DirectoryInfo)
{
string path = Path.Combine(((DirectoryInfo)parentObj.BaseObject).FullName, child);
using (baseDisk.CreateDifferencingDisk(path)) { }
newDisk = new OnDemandVirtualDisk(path, FileAccess.ReadWrite);
}
else if (parentObj.BaseObject is DiscDirectoryInfo)
{
DiscDirectoryInfo ddi = (DiscDirectoryInfo)parentObj.BaseObject;
string path = Path.Combine(ddi.FullName, child);
using (baseDisk.CreateDifferencingDisk(ddi.FileSystem, path)) { }
newDisk = new OnDemandVirtualDisk(ddi.FileSystem, path, FileAccess.ReadWrite);
}
else
{
WriteError(new ErrorRecord(
new DirectoryNotFoundException("Cannot create a virtual disk in that location"),
"BadDiskLocation",
ErrorCategory.InvalidArgument,
null));
return;
}
WriteObject(newDisk, false);
}
finally
{
if (baseDisk != null)
{
baseDisk.Dispose();
}
}
}
