[fpc-pascal]No wait execution and redirection of stdin and stdout

Peter H.M. Brooks peter at new.co.za
Tue Aug 27 22:52:01 CEST 2002

No, I'm not talking about the really primitive one - I mean the Windoze
based ones - XP, 2000 and so forth.

----- Original Message -----
From: <XHajT03 at mbox.vol.cz>
To: <fpc-pascal at deadlock.et.tudelft.nl>
Sent: Tuesday, August 27, 2002 10:26 PM
Subject: Re: [fpc-pascal]No wait execution and redirection of stdin and

> From:           "Peter H.M. Brooks" <peter at new.co.za>
> To:             <fpc-pascal at deadlock.et.tudelft.nl>
> Date sent:      Tue, 27 Aug 2002 20:24:32 +0200
> Organization:   Psyche Trading Company
> Subject:        [fpc-pascal]No wait execution and redirection of stdin and
> Send reply to:  fpc-pascal at deadlock.et.tudelft.nl
> > Sadly I need to do development under msdros.
>  .
> .
> > - Firstly I'd like to launch a program with no wait and then check for
> > its completion later.
>  If you're talking about real MS-DOS (i.e. no Winslows on top of it,
> etc.), you just can't do that - there's no multitasking support in MS-
> DOS itself, so you'd first have to implement this one yourself (or
> find some solution created by somebody else). There are some
> multitaskers (e.g. Desqview) - if you're talking about something like
> this, you should specify it, since every such product has its own
> API. I could probably tell you something more if I know what you're
> trying to do (you might be able to run two tasks in parallel by
> hooking some interrupts for example).
> > - Secondly, when launching a program I'd like to redirect its stdin
> > and stdout equivalents so that I can write to it and read from it
> > while it is executing - clearly I need to be able to do the above
> > first!
>  Plain executing with redirecting input / output / error and _with_
> waiting is of course possible, you'd just have to process the results
> after the child process is finished.
> > - I'd also like to be able to send signals to programs that I have
> > launched to terminate them or establish their current state.
>  See above - there's no multitasking in DOS by default, so there's
> generally just one process which has full control of everything (i.e.
> once you launch a child process it runs until it terminates itself).
> Tomas
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