This is a little misleading - to my knowledge Cygwin is the only major
platform that claims to be vaguely Unix-like and lacks SCM_RIGHTS or
some way of passing file descriptors. Certainly the only one anyone has
suggested porting tmux to.

So I would say it is a limit of Cygwin or the Windows platform that
prevents tmux being ported, not an inherent limit of tmux.

BTW POSIX specifies SCM_RIGHTS, although merely as "access rights" not
specifically file descriptors. Still, are there any implementations that
treat it as anything else?



On Wed, Mar 20, 2013 at 09:52:03AM +0100, Romain Francoise wrote:
> Chris Johnsen <chris_john...@pobox.com> writes:
> 
> > Having maintained tmux as cross-platform project, you probably have
> > a good feel for where the sharp cross-platform edges lurk, so
> > I welcome further consideration of the right approach. I would
> > certainly not attempt to claim that my implementation is definitely
> > cross-platformly correct, just that it seemed like a reasonable
> > approach, and that "it works for me" (for all _that_ is worth).
> 
> tmux's portability is inherently limited anyway by the fact that it relies
> on the ability to pass file descriptors over Unix domain sockets. That
> prevents it from being ported to e.g. Cygwin.
> 
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