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114 lines
3.7 KiB
114 lines
3.7 KiB
#!/bin/sh
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# @(#) mutt_bgrun $Revision: 1.4 $
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# mutt_bgrun - run an attachment viewer from mutt in the background
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# Copyright (C) 1999-2002 Gary A. Johnson
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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# SYNOPSIS
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# mutt_bgrun viewer [viewer options] file
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#
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# DESCRIPTION
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# Mutt invokes external attachment viewers by writing the
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# attachment to a temporary file, executing the pipeline specified
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# for that attachment type in the mailcap file, waiting for the
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# pipeline to terminate, writing nulls over the temporary file,
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# then deleting it. This causes problems when using graphical
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# viewers such as qvpview and acroread to view attachments.
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#
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# If qvpview, for example, is executed in the foreground, the mutt
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# user interface is hung until qvpview exits, so the user can't do
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# anything else with mutt until he or she finishes reading the
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# attachment and exits qvpview. This is especially annoying when
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# a message contains several MS Office attachments--one would like
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# to have them all open at once.
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#
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# If qvpview is executed in the background, it must be given
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# enough time to completely read the file before returning control
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# to mutt, since mutt will then obliterate the file. Qvpview is
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# so slow that this time can exceed 20 seconds, and the bound is
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# unknown. So this is again annoying.
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#
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# The solution provided here is to invoke the specified viewer
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# from this script after first copying mutt's temporary file to
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# another temporary file. This script can then quickly return
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# control to mutt while the viewer can take as much time as it
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# needs to read and render the attachment.
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#
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# EXAMPLE
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# To use qvpview to view MS Office attachments from mutt, add the
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# following lines to mutt's mailcap file.
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#
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# application/msword; mutt_bgrun qvpview %s
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# application/vnd.ms-excel; mutt_bgrun qvpview %s
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# application/vnd.ms-powerpoint; mutt_bgrun qvpview %s
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#
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# AUTHOR
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# Gary A. Johnson
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# <garyjohn@spk.agilent.com>
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#
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# ACKNOWLEDGEMENTS
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# My thanks to the people who have commented on this script and
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# offered solutions to shortcomings and bugs, especially Edmund
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# GRIMLEY EVANS <edmundo@rano.org> and Andreas Somogyi
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# <aso@somogyi.nu>.
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prog=${0##*/}
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# Check the arguments first.
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if [ "$#" -lt "2" ]
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then
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echo "usage: $prog viewer [viewer options] file" >&2
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exit 1
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fi
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# Separate the arguments. Assume the first is the viewer, the last is
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# the file, and all in between are options to the viewer.
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viewer="$1"
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shift
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while [ "$#" -gt "1" ]
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do
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options="$options $1"
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shift
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done
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file=$1
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# Create a temporary directory for our copy of the temporary file.
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#
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# This is more secure than creating a temporary file in an existing
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# directory.
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tmpdir=/tmp/$LOGNAME$$
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umask 077
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mkdir "$tmpdir" || exit 1
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tmpfile="$tmpdir/${file##*/}"
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# Copy mutt's temporary file to our temporary directory so that we can
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# let mutt overwrite and delete it when we exit.
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cp "$file" "$tmpfile"
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# Run the viewer in the background and delete the temporary files when done.
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(
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"$viewer" $options "$tmpfile"
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rm -f "$tmpfile"
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rmdir "$tmpdir"
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) &
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