From: Damien Doligez <Damien.Doligez@inria.fr>
To: caml-list@inria.fr, laszlo@ropas.kaist.ac.kr
Subject: Re: [Caml-list] Pipes in 3.01
Date: Fri, 30 Mar 2001 13:33:53 +0200 (MET DST) [thread overview]
Message-ID: <200103301133.NAA0000003563@beaune.inria.fr> (raw)
>From: Laszlo Nemeth <laszlo@ropas.kaist.ac.kr>
> let (dIn, dOut) = Unix.pipe () in
You're creating one pipe.
> let dProcess = Unix.create_process "daVinci"
> [| "-pipe" |]
> ~stdin:dIn
> ~stdout:dOut
> ~stderr:Unix.stderr
You're piping the output of daVinci into its own input.
> let len = Unix.read dIn ~buf ~pos:0 100 in
You're competing with daVinci on reading its output
>On the other hand, if I start up daVinci in a shell (with
>-pipe) it immediately sends back the string ok.
I guess it does the same here, but it reads back the "ok" before you
do, then it waits for some more input.
If you want to send some input to daVinci AND get back its output, you
will need to create two pipes.
-- Damien
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next reply other threads:[~2001-03-30 11:33 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-03-30 11:33 Damien Doligez [this message]
2001-03-31 2:12 ` Laszlo Nemeth
-- strict thread matches above, loose matches on Subject: below --
2001-03-30 3:43 Laszlo Nemeth
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