#!/bin/sh

# Munin plugin for monitoring the Postfix mail queue in multi-instance
# systems.  Symlink/rename to 'postfix_mailqueue_$SPOOLDIR'.
# Copyright © 2015 Guilhem Moulin <guilhem@fripost.org>
#
# This program 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 3 of the License, or
# (at your option) any later version.
#
# This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.

PATH=/usr/bin:/bin:/usr/sbin:/sbin

name="${0##*/}"
[ "${name#postfix_mailqueue_}" != "$name" ] && postfix="${name#postfix_mailqueue_}" || postfix=
SPOOLDIR="/var/spool/${postfix:-postfix}"

. $MUNIN_LIBDIR/plugins/plugin.sh

case "${1:-}" in
    config) cat <<- EOF
		graph_title Postfix mailqueue ($([ -n "$postfix" -a "$postfix" != postfix ] && echo "'${postfix#postfix-}'" || echo default) instance)
		graph_vlabel Mails in queue
		graph_args --base 1000 -l 0
		graph_scale no
		graph_category postfix
		graph_total Total
		active.label active
		deferred.label deferred
		maildrop.label maildrop
		incoming.label incoming
		corrupt.label corrupt
		hold.label held
	EOF
    for field in active deferred maildrop incoming corrupt hold; do
        print_warning "$field"
        print_critical "$field"
    done
    exit 0
    ;;
esac

for field in active deferred maildrop incoming corrupt hold; do
    if [ -d "$SPOOLDIR/$field" ]; then
        echo $field.value $(find "$SPOOLDIR/$field" -type f | wc -l)
    else
        echo $field.value U
    fi
done