Added view_attachment, for mutt on os x.

view_attachment

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+#!/bin/bash
+#
+# Author:  Eric Gebhart
+#
+# Purpose:  To be called by mutt as indicated by .mailcap to handle mail attachments.
+#            
+# Function: Copy the given file to a temporary directory so mutt
+#           Won't delete it before it is read by the application.
+#
+#           Along the way, discern the file type or use the type 
+#           That is given.
+#
+#           Finally use 'open' or 'open -a' if the third argument is
+#           given. 
+#
+#
+# Arguments:
+#
+#     $1 is the file
+#     $2 is the type - for those times when file magic isn't enough.
+#                      I frequently get html mail that has no extension
+#                      and file can't figure out what it is.
+#    
+#                      Set to '-' if you don't want the type to be discerned.
+#                      Many applications can sniff out the type on their own.
+#                      And they do a better job of it too.
+#                      
+#                      Open Office and MS Office for example.
+#                      
+#     $3 is open with.  as in open -a 'open with this .app' foo.xls
+#
+# Examples:  These are typical .mailcap entries which use this program.
+#
+#     Image/JPEG; /usr/local/bin/view_attachment %s
+#     Image/PNG; /usr/local/bin/view_attachment %s
+#     Image/GIF; /usr/local/bin/view_attachment %s
+# 
+#     Application/PDF; /usr/local/bin/view_attachment %s
+#
+#         #This HTML example passes the type because file doesn't always work and 
+#         #there aren't always extensions.
+#
+#     text/html; /usr/local/bin/view_attachment %s html
+#
+#         # If your Start OpenOffice.org.app is spelled with a space like this one, <--
+#         # then you'll need to precede the space with a \ .  I found that too painful
+#         # and renamed it with an _.   
+#
+#     Application/vnd.ms-excel; /usr/local/bin/view_attachment %s "-" '/Applications/OpenOffice.org1.1.2/Start_OpenOffice.org.app'
+#     Application/msword; /usr/local/bin/view_attachment %s "-" '/Applications/OpenOffice.org1.1.2/Start_OpenOffice.org.app'
+# 
+#
+# Debugging:  If you have problems set debug to 'yes'.  That will cause a debug file
+#             be written to /tmp/mutt_attach/debug so you can see what is going on.
+#
+# See Also:  The man pages for open, file, basename
+#
+
+# the tmp directory to use.
+tmpdir="/tmp/mutt_attach"
+
+# the name of the debug file if debugging is turned on.
+debug_file=$tmpdir/debug
+
+# debug.  yes or no.  
+debug="no"
+#debug="yes"
+
+type=$2
+open_with=$3
+
+# make sure the tmpdir exists.
+mkdir -p $tmpdir
+
+# clean it out.  Remove this if you want the directory
+# to accumulate attachment files.
+rm -f $tmpdir/*
+
+# Mutt puts everything in /tmp by default. 
+# This gets the basic filename from the full pathname.
+filename=`basename $1`
+
+# get rid of the extenson and save the name for later.
+file=`echo $filename | cut -d"." -f1`
+
+if [ $debug = "yes" ]; then
+    echo "1:" $1 " 2:" $2 " 3:" $3 > $debug_file
+    echo "Filename:"$filename >> $debug_file
+    echo "File:"$file >> $debug_file
+    echo "===========================" >> $debug_file
+fi
+
+# if the type is empty then try to figure it out.
+if [ -z $type ]; then
+    type=`file -bi $1 | cut -d"/" -f2`
+fi
+
+# if the type is '-' then we don't want to mess with type.
+# Otherwise we are rebuilding the name.  Either from the
+# type that was passed in or from the type we discerned.
+if [ $type = "-" ]; then
+    newfile=$filename
+else
+    newfile=$file.$type
+fi
+
+newfile=$tmpdir/$newfile
+
+# Copy the file to our new spot so mutt can't delete it
+# before the app has a chance to view it.
+cp $1 $newfile
+
+if [ $debug = "yes" ]; then
+    echo "File:" $file "TYPE:" $type >> $debug_file
+    echo "Newfile:" $newfile >> $debug_file
+    echo "Open With:" $open_with >> $debug_file
+fi
+
+# If there's no 'open with' then we can let preview do it's thing.
+# Otherwise we've been told what to use.  So do an open -a.
+
+if [ -z $open_with ]; then
+    open $newfile
+else
+    open -a "$open_with" $newfile
+fi