From mboxrd@z Thu Jan  1 00:00:00 1970
From: Nick Dokos <nicholas.dokos@hp.com>
Subject: Re: setting default pdf viewer
Date: Sun, 11 Mar 2012 22:50:19 -0400
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In-Reply-To: Message from prad <prad@towardsfreedom.com>
	of "Sun, 11 Mar 2012 18:58:52 PDT." <87k42qeg0z.fsf@psinom.home>
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To: prad <prad@towardsfreedom.com>
Cc: nicholas.dokos@hp.com, emacs-orgmode@gnu.org

prad <prad@towardsfreedom.com> wrote:


> here's what i found in /etc/mailcap
> 
> application/pdf; /usr/bin/xpdf '%s'; test=test "$DISPLAY" != ""; description=Portable Document Format; nametemplate=%s.pdf
> 
> application/x-pdf; /usr/bin/xpdf '%s'; test=test "$DISPLAY" != ""; description=Portable Document Format; nametemplate=%s.pdf
> 
> application/pdf; evince '%s'; test=test -n "$DISPLAY"; nametemplate=%s.pdf
> 
> however, i'm not sure how to interpret this.
> 

I'm no expert but I believe that the first entry that matches wins: for
"application/pdf" e.g. in this case, if /usr/bin/xpdf is present and
executable and the display test succeeeds, xpdf will be used. Otherwise
it's going to search further: if evince is present and the display test
succeeds, evince will be used.

You probably want to experiment by adding entries to ~/.mailcap, so that
you don't mess up the system one: entries in ~/.mailcap override. I just
have the bare minimum in mine:

application/pdf; xpdf -q %s

Next question: since xpdf is available and /etc/mailcap prefers it, why
is nautilus using evince? Doesn't it use mailcap? I guess not, although
I don't know for sure[fn:1], but it wouldn't surprise me if it did its
own thing: there are way too many cooks in this kitchen.

Nick

Footnotes:

[fn:1] as you might guess, I don't use nautilus: I have emacs - why would
       I use anything else?