mailcap syntax to check whether program is available?

pau · 11-06-2015, 12:14 PM

Hi:

I am trying to figure out how to tell mailcap that it should check whether a program exists before trying to open the attachment with it.

Something like

Code:

application/pdf; atril %s then use atril, else use evince

In zsh this would be something like this

Code:

        *.pdf|*.ps|*.eps|*.ps.gz|*.eps.gz|*.PDF|*.Ps|*.EPS|*.PS.GZ|*.EPS.GZ)

                         if [ -s $EVINCE ]
                          then $EVINCE $1
                             else
                              if [ -s $ATRIL ]
                              then $ATRIL $1
                                else $XPDF $1
                              fi
                        fi;;

But I do not know how to translate this into mailcap syntax...

Anybody?

thanks

Didier Spaier · 11-06-2015, 03:08 PM

In my understanding in the "test=test <something>" construct, "test <something>" could be any test specified by POSIX.

So I would write for instance:

Code:

application/pdf; atril s; test=test -x /usr/bin/atril
application/pdf; evince s; test=test -x /usr/bin/evince

Of course this assumes that these binaries are in /usr/bin, else adapt accordingly.

Caveat: that's what I infer from some docs (mainly "man mailcap") as I never tried that myself.

pau · 11-07-2015, 05:48 AM

That's not the problem, it suffices with specifying it:

Quote:

`which atril`

But it is not doing what I want, because if it does not find atril, it does not jump to the next possibility. I tried this by writing a wrong name, for instance AAAAAAatril

Quote:

application/pdf; AAAAAAatril s; test=test -x `which atril`
application/pdf; evince %s; test=test -x `which evince`
application/pdf; xpdf %s; test=test -x `which xpdf`

This results in mutt complaining:

Quote:

sh: 1: AAAAAAatril: not found
Press any key to continue...

While I expected it to jump to the next possibility, evince...

For this I need a "if atril does not exist, then use evince, if evince does not exist, then use xpdf"

pau · 11-09-2015, 12:19 AM

Ok, I solved this by adding

Quote:

application/pdf; mailcappdf.sh s; copiousoutput

With

Quote:

pyrrha(pts/0)| cat mailcappdf.sh
#!/bin/sh

ATRIL=`which atril`
EVINCE=`which evince`
XPDF=`which xpdf`

if [ -f "$ATRIL" ]
then
$ATRIL $1
else
if [ -f "$EVINCE" ]
then
$EVINCE $1
else
if [ -f "$XPDF" ]
then
$XPDF $1
else
echo "You do not have atril, nor evince, nor xpdf, borinot!"
fi
fi
fi