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#!/bin/bash
# Based on update-apt-status
# Copyright 2009 Peter Palfrader
#
# Copyright 2014 conova communications GmbH
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
UPDATE_RUNS=3
STATUSDIR=/var/cache/nagios_status
STATUS=${STATUSDIR}/check_libs
SLEEP_MAX=$(( 15 * 60 ))
MAX_AGE=$(( 23 * 60 * 60 ))
# we want to run if any of the following things is true
# - we have never run before
# - var/lib/dpkg/status has been touched since the last run
# - var/cache/apt/pkgcache.bin has been touched since the last run
# - our last run ended with 'apt-get update failed'
# - our last run has been more than MAX_AGE (23hrs) ago
run_required() {
local run=0
local norun=1
[ -e "$STATUS" ] || return $run
[ /var/lib/dpkg/status -nt "$STATUS" ] && return $run
[ /var/cache/apt/pkgcache.bin -nt "$STATUS" ] && return $run
grep "apt-get update failed" "$STATUS" > /dev/null && return $run
local last_mod
last_mod=`stat -c "%Y" "$STATUS"`
now=`date +%s`
age=$(( $now - $last_mod ))
[ "$age" -gt "$MAX_AGE" ] && return $run
return $norun
}
if [ ! -d ${STATUSDIR} ]; then
mkdir -p ${STATUSDIR}
fi
# do stuff only when required, or when asked to
if [ "${1:-""}" != "-f" ] ; then
run_required || exit 0
fi
# sleep if called non-interactively
if [ -z "$TERM" -o "$TERM" = "dumb" ]; then
sleep $(( $RANDOM % $SLEEP_MAX ))
fi
# run the apt check itself
tmp=`tempfile`
trap "rm -f '$tmp'" exit
/usr/lib/nagios/plugins/check_libs > "$tmp"
result="$?"
case "$result" in
0)
st="OK"
;;
1)
st="WARNING"
;;
2)
st="CRITICAL"
;;
*)
st="UNKNOWN"
;;
esac
(echo "$st"; cat "$tmp") > "$STATUS"
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