Re: stdout being changed in EPICS

[Eric Norum <norume@aps.anl.gov>]

On Jul 17, 2008, at 5:25 PM, J. Lewis Muir wrote:

> On 7/17/08 9:31 AM, Mark Rivers wrote:
> > I’ve done some more investigation of this.  It appears that stdout is
> > being closed and re-opened when the vxWorks startup script completes.
> > Does anyone know if this is true?  If so, I don’t understand why.  I
> > can understand why stdin may be reopened, changing from the startup
> > script to the console.  But why stdout?  Is there a way to open a  
> > file
> > descriptor to the console that will not be closed and re-opened  
> > when the
> > startup script completes?
>
> Hi, Mark.
>
> I looked at src/iocsh/iocsh.cpp in EPICS base 3.14.9 and it seems to  
> be
> doing some special things with (FILE *) references to support
> redirection.  Maybe this is causing the problem?  The comment in the
> file indicates the original author was Marty Kraimer and that it was
> modified by Eric Norum a little later.

Not an issue.
Mark isn't using iocsh.

> There are about four places in the file where fclose() is called on a
> (FILE *) reference.  You could add a print statement before these to  
> see
> if this is indeed where stdout is getting closed.
>
> But I bet Marty or Eric know better.

--
Eric Norum <norume@aps.anl.gov>
Advanced Photon Source
Argonne National Laboratory
(630) 252-4793