[9fans] getting at Windows files from VMware-hosted Plan 9

[Mike Haertel <mike@ducky.net>]

First of all, here is a cute 1-liner for running u9fs without inetd
(useful if your local system administrator refuses to run u9fs from inetd,
or you hate rhosts-style authentication, or whatever...)

% ssh myname@remotehost u9fs -a none -u myname <[0=1] | echo 0 > /srv/remotehost
% mount /srv/remotehost /n/kremvax

I thought people might be interested in how I'm using this: I have an ssh
daemon running on my Windows box at work, courtesy of Cygwin.  I run Plan 9
under VMware on the same box.

I ported u9fs to Windows, again courtesy of Cygwin.  (Main changes: Cygwin has
no setre[ug]id(), no ruserok(), no <inttypes.h>, and no pread()/pwrite().
Diffs available upon request.)

So, in my VMware-hosted Plan 9 running under Windows, I do the following:

% ssh Administrator@windows u9fs -a none -u Administrator <[0=1] | echo 0 > /srv/windows
% mount /srv/windows /n/kremvax
% bind /n/kremvax/cygdrive/c /n/c

and thus I can use /n/c from VMware to look at the windows partition, just
as if Plan 9 were running on the bare hardware.

Moreover, this hack allows Plan 9 to see the contents of any SMB file server
that the host Windows environment can access.  Very useful if you're stuck
in a mixed network of evil operating systems.