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Re: [bug-gv] gv fails when fed via pipe

From: Nuno Silva
Subject: Re: [bug-gv] gv fails when fed via pipe
Date: Mon, 5 May 2014 10:09:18 +0300
User-agent: Mutt/1.5.22 (2013-10-16)

On Sun, May 04, 2014 at 12:28:42PM -1000, Paul Wessel wrote:
> Hi list-
> I have noticed that gv often crashes when a process writes PostScript
> directly to it via a pipe while the same PostScript, if first saved to
> a file, opens fine.  These cases always involves the image operator.
> We _think_ we are writing the PS correctly as it works in all other
> contexts except the piping via gv.
> Attached is a small example (issue.ps) that demonstrates the
> issue. For instance,
> gv issue.ps   [works fine]
> gv - < issue.ps [gives errors]
> I am using gv version 3.7.4 installed via macports on OSX 10.9.2.

I can reproduce this with gv 3.7.3 on Gentoo GNU/Linux. I also did some
quick tests with other tools that (AFAIK) use ghostscript internally,
and they did *not* have this issue: convert (imagemagick), ps2pdf.

  $ convert - issue.png < issue.ps

  $ ps2pdf - issue.pdf < issue.ps

I did also try with ghostscript as well, and it worked:

  $ gs -q -sPAPERSIZE=a4 -dBATCH -dNOPAUSE -sDEVICE=ps2write \
     -sOutputFile=out.ps - < issue.ps

Converting PDF files with images to postscript, and then invoking gv in
the same way on the resulting postscript files seems to trigger some
error as well.

Nuno Silva (aka njsg)

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