How do I redirect stdout from system/execlp calls?

[Paul Nilsson]

Hi,

Does anyone know how to redirect text output when issuing a system or an
execlp call? I have a GUI that insists on opening up a console whenever I
give a system function call, and I would like to redirect the text output to
a char buffer instead.

Paul

[tom_usenet]

Re: How do I redirect stdout from system/execlp calls?

On Fri, 3 Oct 2003 18:38:53 +0200, "Paul Nilsson"
<Paul.Nilsson@c ern.ch> wrote:
[color=blue]
>Hi,
>
>Does anyone know how to redirect text output when issuing a system or an
>execlp call? I have a GUI that insists on opening up a console whenever I
>give a system function call, and I would like to redirect the text output to
>a char buffer instead.[/color]

comp.unix.progr ammer might be a better place to ask, since standard
C++ has no methods to interact with consoles or any way to launch
processes other than "system".

Tom

[WW]

Re: How do I redirect stdout from system/execlp calls?

Paul Nilsson wrote:[color=blue]
> Hi,
>
> Does anyone know how to redirect text output when issuing a system[/color]

system("a command with output redirected");
[color=blue]
> or an execlp call?[/color]

There is no execlp in standard C++: http://www.slack.net/~shiva/welcome.txt
[color=blue]
> I have a GUI that insists on opening up a console
> whenever I give a system function call, and I would like to redirect
> the text output to a char buffer instead.[/color]

It will possibly still open a console. You will need to post your question
to a newsgroup dedicated to your platform/compiler:

http://www.parashift.com/c++-faq-lite/how-to-post.html#faq-5.9

--
WW aka Attila

[Jerry Coffin]

Re: How do I redirect stdout from system/execlp calls?

In article <blk8nu$bu$1@su nnews.cern.ch>, Paul.Nilsson@ce rn.ch says...[color=blue]
> Hi,
>
> Does anyone know how to redirect text output when issuing a system or an
> execlp call? I have a GUI that insists on opening up a console whenever I
> give a system function call, and I would like to redirect the text output to
> a char buffer instead.[/color]

Find a newsgroup devoted to the OS you're using, and ask them about
popen -- it's likely to be available, and if it's not, there are at
least likely to be some people who will recognize the name and know what
to advise as an alternative.

--
Later,
Jerry.

The universe is a figment of its own imagination.

[Paul Nilsson]

Re: How do I redirect stdout from system/execlp calls?

"Jerry Coffin" <jcoffin@taeus. com> wrote in message
news:MPG.19e957 a8a012dd33989b4 c@news.clspco.a delphia.net...[color=blue]
> In article <blk8nu$bu$1@su nnews.cern.ch>, Paul.Nilsson@ce rn.ch says...[color=green]
> > Hi,
> >
> > Does anyone know how to redirect text output when issuing a system or an
> > execlp call? I have a GUI that insists on opening up a console whenever[/color][/color]
I[color=blue][color=green]
> > give a system function call, and I would like to redirect the text[/color][/color]
output to[color=blue][color=green]
> > a char buffer instead.[/color]
>
> Find a newsgroup devoted to the OS you're using, and ask them about
> popen -- it's likely to be available, and if it's not, there are at
> least likely to be some people who will recognize the name and know what
> to advise as an alternative.[/color]

Hi,

Thanks, aparently this only works for console applications. However, the
MSVC++7 documentation for the popen function links to a document showing how
to do with a windows application as well! So you helped me anyway! Thanks,
Paul
[color=blue]
>
> --
> Later,
> Jerry.
>
> The universe is a figment of its own imagination.[/color]