[XForms] Using Xform in background without display

Fri Jun 22 09:42:20 EDT 2007

Hi Didier,

the following I found using Google:

"If you are not running X on the server, then you need a dummy X server.
You can create one with xVNC or Xvfb on the server. Set your DISPLAY
variable to the dummy X server."

The complete article is located at
"http://www.linuxquestions.org/questions/showthread.php?t=370706"

Is this a solution for you ?

Best regards,
Gerald

On Fri, 22 Jun 2007 10:20:39 +0200 (CEST)
Didier Verkindt <verkindt at lapp.in2p3.fr> wrote:

> To subscribers of the xforms list
> 
> 
> Hi,
> Hoping that Xforms and this mailing list are still alive.
> 
> I have developped since several years a data visualization application
> that uses Xforms as GUI (but not for showing plots). Now, in some cases, I
> would like to run this application in background (without user
> interaction and without showing any xform window) on a machine which has
> no display. I was able not to display xform windows but I get stucked on
> the fl_initialize function.
> With the following error message:
>     Can't open display --No such file or directory
>     Missing or failed fl_initialize()
> 
> Does somebody knows a simple way to overcome this problem?
> Or should I try to propose a modification
> to Xform in order to separate in fl_initialize what is specific xform init
> from what is related to the display?
> 
> -----------------------------------------------------------
> Didier VERKINDT, LAPP, Ch. de Bellevue, 74941 Annecy-le-Vieux, FRANCE
> tel:33(0)450091671 or 5573  fax:33(0)450279495  web:lapp.in2p3.fr/~verkindt
> 
> 
> On Thu, 28 Dec 2006, Moots, Joel A. (IT Solutions/EOS) wrote:
> 
> > To subscribers of the xforms list
> >
> > Since the program is so small, can you find the smallest amount of code
> > needed for you to reproduce the problem and then paste just the parts
> > you wrote to this list? E.g., if you don't need a slider callback to
> > reproduce the problem, get rid of it; if you need the callback but don't
> > need to retrieve the value, get rid of it; etc. If that's still rather
> > large, can you tar/gzip just the source files with no extension on the
> > filename and email to me.
> >
> > TIA,
> >
> > -joel
> >
> > -----Original Message-----
> > From: xforms-bounces at bob.usuhs.mil [mailto:xforms-bounces at bob.usuhs.mil]
> > On Behalf Of Kerich, Steve (AGTE)
> > Sent: Thursday, December 28, 2006 11:24 AM
> > To: xforms at bob.usuhs.mil
> > Subject: [XForms] corrupted text or big question box returns
> >
> > To subscribers of the xforms list
> >
> >
> > Hi
> >
> > I have been doing more testing and have found with my test program that
> > if I call fl_show_alert before fl_show_question, the corruption of the
> > question box goes away. I have noticed this fix also works for another
> > executable that is having trouble with the question box. If I display an
> > alert just before the question box, the problem goes away. I haven't
> > tried it with the other 2 images that are showing the same/similar
> > problem. There must be some XForms connection between the two.
> >
> > My test program is very very small so I don't believe that there are
> > pointer or memory stack issues involved.
> >
> > Jens tried out my test program on a Linux box using gcc but was unable
> > to reproduce the problem I have been seeing. So I guess that is a clue
> > too. That it has something to so with Solaris or the compiler. The
> > compiler used is SUNspro instead of gcc. I do not know why this compiler
> > was picked in the beginning.
> >
> > Because this problem is spread through several of our applications, I
> > really need to find a solution. Is there anyone who has debug ideas or
> > could help with this?
> >
> > Any help would be appreciated.
> >
> > Steve
> >
> >
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