ezmlm-web-modules/crypto-ezmlm/trunk/bin/gpgpy-ezmlm-queue

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#!/bin/sh
#
# This file is part of gpgpy-ezmlm - an encryption filter for the
# ezmlm-idx mailinglist manager.
#
# Copyright 02007 Sense.Lab e.V. <info@senselab.org>
#
# This script is used to decide if we have to call qmail-queue directly
# or if we should call the gpgpy re-encrypting wrapper instead.
#
# Add the following environment setting to qmail-start (e.g. in
# /var/qmail/rc):
# QMAILQUEUE=PATH_TO_THIS_SCRIPT
#
# In case you did not install qmail in its default directory (/var/qmail)
# or if you use a filtering qmail-queue wrapper (e.g. for spam filtering)
# then you should change the setting GPGPY_QMAILQUEUE so that it contains
# the path of your qmail-queue program.
#
#
# gpgpy-ezmlm is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# gpgpy-ezmlm is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with the CryptoBox; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
##################### configuration #####################
# maybe you have to adjust the following lines according to your setup
# the following settings can also be overriden by environment settings
# with the same name
# the original qmail-queue program
GPGPY_QMAILQUEUE=${GPGPY_QMAILQUEUE:=/var/qmail/bin/qmail-queue}
# the python filter of gpgpy-ezmlm-queue
GPGPY_EZMLM_ENCRYPT=${GPGPY_EZMLM_ENCRYPT:=/usr/local/bin/gpgpy-ezmlm-encrypt}
# are all encrypted mailinglists handled by a single user?
# then put its UID here - for all other UIDs the original qmail-queue will be
# used instead
GPGPY_RESTRICT_UID=${GPGPY_RESTRICT_UID:=}
# we read our configuration from 'conf-gpgpy'
GPGPY_EZMLM_CONF_FILE="conf-gpgpy"
# call the original qmail-queue program without the changed QMAILQUEUE setting
EXEC_ORIG_QUEUE="exec env --unset=QMAILQUEUE $GPGPY_QMAILQUEUE"
##################### self-test #########################
# should we do some self-tests?
if test "$#" -eq 1 -a "$1" = "test"
then error=
# check if the original qmail-queue is executable
if test -x "$GPGPY_QMAILQUEUE"
then true
else error=yes
echo >&2 "Could not find executable qmail-queue: $GPGPY_QMAILQUEUE"
fi
# check if the gpgpy-ezmlm wrapper for qmail-queue exists
# also check if it returns any errors
if test -x "$GPGPY_EZMLM_ENCRYPT"
then if "$GPGPY_EZMLM_ENCRYPT"
then true
else error=yes
fi 2>&1 | sed 's/^/[gpg-ezmlm-encrypt] /' >&2
else error=yes
echo >&2 "Could not find executable gpgpy-ezmlm-queue: $GPGPY_EZMLM_ENCRYPT"
fi
# check GPGPY_RESTRICT_UID for invalid values
if test -n "$GPGPY_RESTRICT_UID"
then if test 0 -le "$GPGPY_RESTRICT_UID" 2>/dev/null
then true
else error=yes
echo >&2 "Invalid value of GPGPY_RESTRICT_UID ($GPGPY_RESTRICT_UID) - only integer values are allowed!"
fi
fi
# print results to stderr
if test -z "$error"
then echo "Successfully finished self-tests"
exit 0
else echo >&2
echo >&2 "Some self-tests failed - please fix them before deploying gpgpy-ezmlm!"
exit 81
fi
fi
################### queue selection #####################
# do some tests to decide, if we should run the gpgpy filter or not
test -n "$GPGPY_RESTRICT_UID" -a "$UID" != "$GPGPY_RESTRICT_UID" && $EXEC_ORIG_QUEUE
# the HOME setting is necessary
test -z "$HOME" && $EXEC_ORIG_QUEUE
# which dot-qmail file should we check? (see 'man qmail-command' for details)
if test -z "$EXT"
then DOTQMAIL_FILE=$HOME/.qmail
else DOTQMAIL_FILE=$HOME/.qmail-$EXT
fi
# does the dot-qmail file exist?
test -r "$DOTQMAIL_FILE" || $EXEC_ORIG_QUEUE
# filter the respective mailing list directory of this delivery
MAILINGLIST_DIR=$(grep "/ezmlm-send '" "$DOTQMAIL_FILE" | sed "s#^.* '\(.*\)'.*\$#\1#")
# is it a mailinglist directory?
test -e "$MAILINGLIST_DIR/lock" || $EXEC_ORIG_QUEUE
# is this mailinglist configured for gpgpy-ezmlm?
test -r "$MAILINGLIST_DIR/$GPGPY_EZMLM_CONF_FILE" || $EXEC_ORIG_QUEUE
# ok - it is a delivery of an encrypted mailinglist
exec env QMAILQUEUE=$GPGPY_QMAILQUEUE "$GPGPY_EZMLM_ENCRYPT" "$MAILINGLIST_DIR"