Re: wait_for_file ?? [print via pipes - help testing on Windows?]

[Ben Abbott]

On Sep 18, 2010, at 9:33 PM, Michael D Godfrey wrote:

> On 09/18/2010 01:08 PM, Shai Ayal wrote:
>> On Sat, Sep 18, 2010 at 8:00 PM, Michael D Godfrey <address@hidden> wrote:
>> 
>> In any case I hope that Shai can figure this out!
>> 
>> I'm currently on a family vacation, I will return at the beginning of 
>> October. Until then I really can't do much.
>> 
>> Shai
> I built a new octave from the current tip and find that the behavior has 
> changed.
> There were some patches today, but it appeared to me that none of the 
> fltk-related
> code was changed.  Anyhow, what happens now is:
> 
> 1. First, as before Ben's example
>  pid = popen ("cat > test.txt", "w");
> >   fprintf (pid, "Hello World");
> >   waitpid (pid);
> >   pclose (pid);
> > works just fine.
> 
> 2. The test_printing script does a bit better:
> 
> octave:1> test_printing
> Xlib:  extension "NV-GLX" missing on display ":1175.0".
> backend is fltk
> print fltk-aifm  -daifm
> print fltk-dxf  -ddxf
> print fltk-emf  -demf
> print fltk-epsc  -depsc
> error: structure has no member `preview'
> error: evaluating argument list element number 1
> error: called from:
> error:   /d/src/octave/hg/octave/scripts/plot/print.m at line 483, column 3
> error: evaluating argument list element number 1
> error:   /d/src/octave/hg/octave/scripts/plot/__fltk_print__.m at line 45, 
> column 10
> error:   /d/src/octave/hg/octave/scripts/plot/print.m at line 346, column 6
> error:   /data/d/src/octave/hg/test_printing.m at line 65, column 9
> octave:1> GL2PS error: Bad file pointer
> panic: Segmentation fault -- stopping myself...
> attempting to save variables to `octave-core'...
> save to `octave-core' complete
> Segmentation fault (core dumped)
> ===========================
> The outputs are:
> -rw-rw-r-- 1 godfrey godfrey  52 Sep 18 18:14 fltk-aifm.ai
> -rw-rw-r-- 1 godfrey godfrey 346 Sep 18 18:14 fltk-dxf.dxf
> -rw-rw-r-- 1 godfrey godfrey   0 Sep 18 18:14 fltk-emf.emf
> ===========================
> but, it crashes in the same manner as before.  The gdb bt is
> attached: fltk02_bt
> 
> However, if I try a simple:
> plot(1:200)
> print tes01.pdf
> 
> octave hangs.  ctrl-c wakes it up.
> The PDF file exists, but is empty.
> the bt for this is attached: fltk03_bt
> 
> Michael
> 
> <fltk02_bt.txt><fltk03_bt.txt>

The `preview' member should be set in __print_parse_opts__.m

I checked the last changeset, and it appears to me that the field is set 
correctly.

What do you get when you type .....

        close all
        backend fltk
        __print_parse_opts__("-depsc", "fltk-epsc.eps")

Ben

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