Re: [Caml-list] Child process doesn't terminate

[Gerd Stolpmann <info@gerd-stolpmann.de>]

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Am Montag, den 24.03.2014, 19:23 +0100 schrieb Johan Grande:
> Hi,
> 
> In the following program, the child process "cat" never terminates. I 
> don't understand why; can anyone tell me?

Because outdescr isn't closed in the child. Set the close-on-exec flag
on it.

Gerd


> ~~~
> let _ =
>    let open Unix in
>    let indescr, outdescr = pipe () in
>    let outchan = out_channel_of_descr outdescr in
>    let pid =
>      create_process "/bin/cat" [|"cat"|]
>        indescr  stdout  stderr
>    in
>    Printf.fprintf outchan "Hello!\n%!";
>    close indescr;
>    close outdescr;
>    ignore (waitpid [] pid)  (* stuck here *)
> ~~~
> 
> -- 
> Johan Grande
> 

-- 
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Gerd Stolpmann, Darmstadt, Germany    gerd@gerd-stolpmann.de
My OCaml site:          http://www.camlcity.org
Contact details:        http://www.camlcity.org/contact.html
Company homepage:       http://www.gerd-stolpmann.de
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