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

[Michael D Godfrey]

On 09/18/2010 10:02 PM, Ben Abbott wrote:

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

octave:1> close all
octave:2> backend fltk
octave:3> __print_parse_opts__("-depsc", "fltk-epsc.eps")
ans =
{
  append_to_file = 0
  canvas_size =

     576   432

  debug = 0
  debug_file = octave-print-commands.log
  devopt = epsc
  epstool_binary = /usr/bin/epstool
  figure = [](0x0)
  fig2dev_binary = /usr/bin/fig2dev
  fontsize =
  font =
  force_solid = 0
  formatted_for_printing = 0
  ghostscript =
  {
    binary = /usr/bin/gs
    debug = 0
    device =
    epscrop =  1
    level = [](0x0)
    output =
    papersize =
    pageoffset =

       0   0

    resolution =  150
    antialiasing = 0
  }

  loose = 0
  name = fltk-epsc.eps
  orientation = portrait
  pstoedit_binary = /usr/bin/pstoedit
  printer =
  send_to_printer = 0
  special_flag = textnormal
  tight_flag = 0
  use_color =  1
  lpr_options = -l
  unlink = {}(0x0)
}

octave:4>

Ben,

Should I have found "preview" in the above?

The evidence that I can figure out suggests that there is still a synchronization
problem with the gl2ps functions.  Shai has said that he can find no way to ensure
that gl has generated the file that you need.

It may be that this needs to wait until Shai is back.  But, if you have things that
I can try in the meantime, I will be happy to help.

In the meantime I will build a system on my local machine, so I can see what difference
it makes to run locally as opposed to through ssh or NX.

Michael