* The legacy code we used for writing disk images used the size of the source image as
the maximum number of bytes we should copy, which is fine for uncompressed DD or VHD
images, but not so much for compressed VHDX ones. So we now make sure to use the
actual size of the virtual disk, which we obtain when mounting the VHD/VHDX.
* Also fix log progress update as well as a MinGW warning.
* Full Flash Update (FFU) image support was added to dism with Windows 10 1709
and is an alternate way to save a virtual hard disk for restoration.
* While more modern than VHD/VHDX, FFU creation only works for drives with file
systems that Windows natively recognizes (FAT, NTFS) and that look like Windows
installation media, so you can forget about FFU'ing a Linux disk.
* The other *intentional* drawback that Microsoft added is that they don't want
anybody but themselves being able to create and restore FFU images, so, even
as they have nice FfuApplyImage()/FfuCaptureImage() calls in FfuProvider.dll
they have decided not to make these public.
* This means that, since we don't have time to spend on figuring and direct
hooking internal DLL calls for x86_32, x86_64, ARM and ARM64 (and worrying
that Microsoft may ever so slightly change their DLL between revs to break
our hooks), we just call on dism.exe behind the scenes to create the FFU.
* Now that we don't have to deal with Windows 7, we can use CreateVirtualDisk() to
automatically dump a physical disk to VHD/VHDX, so do just that
* Also move the relevant VHD/ISO imaging call to the appropriate source.
* Required because some users appear to force kill Rufus while we're doing WUE patching of boot.wim,
and Windows prevents a .wim with the same path and index from being mounted twice, even if the
original .wim has become stale or deleted. Oh, and of course the WIM APIs don't have a force-mount
flag that would take care of this whole situation.
* Basically, this forces us to parse HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WIMMount\Mounted Images
and check each instance for a .wim/index match, so that we can access to the existing mount path
so that we can actually unmout the image (because, in typical Microsoft fashion, WIMUnmountImage
requires both the mount path and the source image to be provided).
* Closes#2199.
* Also improve the existing VHD code to use a struct where possible.
* Some "unofficial" Windows ISOs use a custom boot.wim that only includes the Setup
image at index 1, rather than at index 2, after the PE image, for official ISOs.
* Also refactor to add a long needed vhd.h header.
* Also fix a MinGW warning.
Pete Batard