Re: [9fans] silliness in flight: build a desktop calculator with srv and rio

["Caerwyn Jones" <caerwynj@gmail.com>]

> > >  % dc <[0=1] | echo 0 > /srv/desk

>  Ok, so this is really neat.  How do I do it in inferno?  What's the
> equivalent of /srv?

Inferno has srv(3) which is the file2chan registry. The closest I can
get to the above, without writing a new limbo command, is

% load file2chan
% calc >[0=1] | {file2chan /chan/desk {rblock; putrdata &} {fetchwdata
> /fd/0} } &

% stream -b 1 /chan/desk

% echo 1+1 > /chan/desk

It doesn't really work as the plan9 one liner because file2chan is
binding a new instance of '#s' each time, so the /chan/desk file isn't
visible from other namespaces. If it used an existing instance it
would be. Also, putrdata might do multiple reads to satisfy the single
read from /chan/desk, which is why I'm using stream -b1 to read.  So,
not a success, unless anyone can point out a way I missed.

Caerwyn