File check_repomd of Package monitoring-plugins-repomd

#!/bin/bash
#
# Copyright (C) 2013, SUSE Linux Products GmbH
# Author: Lars Vogdt
#
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice, this
#   list of conditions and the following disclaimer.
#
# * Redistributions in binary form must reproduce the above copyright notice,
#   this list of conditions and the following disclaimer in the documentation
#   and/or other materials provided with the distribution.
#
# * Neither the name of the Novell nor the names of its contributors may be
#   used to endorse or promote products derived from this software without
#   specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.

VERSION="2.1"
DEBUG=0

DAYS=30
GREP='/bin/grep'
CURL='/usr/bin/curl'
CAT='/bin/cat'
CUT='/usr/bin/cut'
MKTEMP='/bin/mktemp'
UTILS='/usr/lib/nagios/plugins/utils.sh'

if [ -r "$UTILS" ]; then
. "$UTILS"
else
    cleanup_and_exit "$STATE_UNKNOWN" "UNKOWN: could not read $UTILS"
fi

function print_help(){
    echo "Usage: $(basename $0) -u <url_to_repomd.xml> [-o <days>] [-d][-v][-h]"
    echo "       checks up-to date state of repomd.xml"
    echo
    echo "       -u <url_to_repomd.xml> : please enter the full URL to the repomd.xml file"
    echo "       -o <days>              : days unless a repomd.xml file is handled as outdated (default: $DAYS)"
    echo "       -d                     : enable debug output"
    echo "       -v                     : print version"
    echo "       -h                     : help (this text)"
    echo 
    print_revision "$(basename $0)" "$VERSION"
    support
    cleanup_and_exit "$STATE_OK" ""
}

function cleanup_and_exit(){
    local EXIT="$1"
    local COMMENT="$2"
    test -f "$RESULTFILE" && rm "$RESULTFILE"
    echo "$COMMENT"
    exit $EXIT
}

while getopts "hu:do:v" OPTION; do
    case $OPTION in
        h) print_help
        ;;
        v) print_revision "$(basename $0)" "$VERSION"
           exit "$STATE_OK"
        ;;
        u) URL="$OPTARG"
        ;;
        o) DAYS="$OPTARG"
        ;;
        d) DEBUG=1
        ;;
    esac
done

if [ -z "$URL" ]; then
    cleanup_and_exit "$STATE_UNKNOWN" "UNKOWN: option -u <url> not defined"
fi

if [[ $DAYS != [0-9]* ]]; then
    cleanup_and_exit "$STATE_UNKNOWN" "UNKNOWN: option -o <days> contains non-integer value"
fi

if [ ! -x $GREP ]; then
    cleanup_and_exit "$STATE_UNKNOWN" "UNKNOWN: could not execute $GREP"
fi

trap 'echo' SIGHUP SIGINT SIGQUIT
trap 'cleanup_and_exit "$STATE_UNKNOWN" "UNKOWN: received SIGTRAP, SIGBUS, SIGKILL, SIGPIPE or SIGTERM signal"' SIGTRAP SIGBUS SIGKILL SIGPIPE SIGTERM

RESULTFILE=$($MKTEMP /tmp/check_repomd-XXXXXX)

$CURL -s $URL -o "$RESULTFILE" 2>&1
CURL_EXIT="$?"

if [ x"$CURL_EXIT" != "x0" ]; then
	cleanup_and_exit "$STATE_UNKNOWN" "UNKOWN: curl returned with error code: $CURL_EXIT"
fi

if ! $GREP -q "revision" "$RESULTFILE"; then
	cleanup_and_exit "$STATE_UNKNOWN" "UNKOWN: needed tag 'revision' not found in output of $URL"
fi

REVISION=$($GREP revision "$RESULTFILE" | $CUT -d "<" -f2 | $CUT -d ">" -f2)
HAS_INFO=$($GREP "type.*suseinfo" "$RESULTFILE")
NOW=$(date +'%s')
let DIFFERENCE=(${NOW}-${REVISION})
let SECONDS=${DAYS}*24*60*60

if [ "$DEBUG" != "0" ]; then
	echo "DEBUG: Output of $CURL -s $URL -o $RESULTFILE :"
	echo
	$CAT $RESULTFILE
	echo
	echo "DEBUG: NOW: $NOW; REVISION: $REVISION; DIFFERENCE: $DIFFERENCE; allowed seconds: $SECONDS"
	echo
fi

if [[ -n "$HAS_INFO" && $DIFFERENCE -gt $SECONDS ]]; then
	cleanup_and_exit "$STATE_CRITICAL" "CRITICAL: repomd.xml from $URL is older than $DAYS days"
else
	cleanup_and_exit "$STATE_OK" "OK: repomd.xml from $URL is younger than $DAYS days"
fi
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