From: arcadepreserv AT hotmail DOT com
Newsgroups: comp.os.msdos.djgpp
Subject: Re: How Do I start another DOS program from DJGPP ?
Date: Tue, 08 Feb 2000 13:03:23 GMT
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

Thanks for your answers. On the not possible in DOS though,
it would be possible to have a starter program that runs a

popen(gets.exe|backend.exe)

where gets.c is something like

char *s;
while (1)
gets(s);


I have tested this and indeed s always contains the latest output
string that backend.exe has output on screen. gets can of course have a
bigger loop and thus process the s string in any matter while the
backend.exe runs and prints it out.

It would be fine though if gets could also make the call to
backend.exe, instead of having a separate caller program.

Any comment on this ? It seams that the non multitasking in DOS can be
overridden, at least some ?



In article <Pine DOT SUN DOT 3 DOT 91 DOT 1000208094014 DOT 28790K AT is>,
  djgpp AT delorie DOT com wrote:
>
> On Mon, 7 Feb 2000 arcadepreserv AT hotmail DOT com wrote:
>
> > I am looking for a dosexex("myprog.exe");
> >
> > type of command, it must be there but what is the syntax and include
> > needed ?
>
> Look up `system' and `spawn*' in the library docs.
>
> > And then I need the calling program to proceed while the called
program
> > executes, how do I do this ?
>
> On plain DOS, you can't.  On Windows, run the subsidiary program like
> this:
>
> 	system("start prog.exe");
>
> > a last question, which is not really essential is how can I read the
> > output from the called program from the calling program ?
>
> Use `popen' and `pclose' from the library.  (Note that this won't
work
> with the above "start" trick.)
>


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