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From: Stephen Leake <stephen.a.leake.1@gsfc.nasa.gov>
Newsgroups: comp.lang.ada,comp.os.vxworks
Subject: Re: redirecting the standard output
Date: 10 Apr 2001 12:46:15 -0400
Organization: NASA Goddard Space Flight Center
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Stephen Leake <stephen.a.leake.1@gsfc.nasa.gov> writes:

> "Martin Dowie" <martin.dowie@gecm.com> writes:
> 
> > This time with a subject... :-)
> > 
> > Target System: PowerPC, AdaMULTI v1.8.9b, VxWorks 5.4
> > 
> > How do I redirect the standard output? I'd like to redirect it to device
> > "/null"
> 
> Normally this is done from the command line, when you launch your
> executable. What OS are you on?

Duh; VxWorks! My brain is _not_ in high-power mode. 

Anyway, I don't know how to redirect in VxWorks, but I _think_ it uses
the Posix shell redirection:

adacode > /dev/nul

> 
> 
> 
> > Attempts: Open (DevNull, Append_File, "/null"); Open (DevNull,
> > "/null", "/null");
> > 
> > just cause Status_Error, i.e. the device is already "open". So how can
> > I then "Set_Output (DevNull);" without having the device object in
> > File_Type form?..
> 
> You can use Ada.Text_IO.Set_Output to set the _current_ output to some
> file. But it has to be an open file, and you haven't gotten there yet.
> 
> Backing up a bit, why do you want to do this? I can guess that you
> want to turn off some debugging output. It is _far_ better to define a
> Debug_IO package, with a Boolean or Integer debug enabled variable.
> Then have a style guide that says "Ada.Text_IO is _forbidden_ in
> delivered code; use Debug_IO if you need debug output".
> 
> -- 
> -- Stephe

-- 
-- Stephe