Options for IPC between bash processes under cygwin

[Jon Seymour]

I'd  like to dispatch commands from one light-weight bash process to a
longer running bash process which takes longer to initialize [ I have
a _big_ library of bash functions ].

On Linux or any reasonable OS, I could do this remote dispatch easily
with named pipes, but these don't exist on cygwin.

I'd be interested to know if there are any good solutions to this
problem already in existence.

jon.