#!/bin/sh

# Author: Adam Cécile <acecile@mandriva.com>
# License: GNU General Public License v2 or later
#
# Based on work by Petter Reinholdtsen <pere@hungry.com>
# In Debian's package "mpt-status"

PATH=/sbin:/bin:/usr/sbin:/usr/bin
STATUSFILE=/var/run/mpt-status.status
MAILTO=root   # Where to report problems (default root)
REMIND=7200   # Seconds between each reminder (default 2 hours)

. /etc/mpt-status/mpt-status-cron.conf

if (mpt-status $PARAMS ) |grep -q 'state OPTIMAL' ; then
    BADRAID=false
else
    BADRAID=true
    logger -t mpt-status "Detected non-optimal RAID status"
fi
STATUSCHANGE=false
if [ true = "$BADRAID" ] ; then
        # RAID not OK
        (mpt-status $PARAMS) > $STATUSFILE.new
        if [ ! -f $STATUSFILE ] ; then # RAID just became broken
                STATUSCHANGE=true
                mv $STATUSFILE.new $STATUSFILE
        elif cmp -s $STATUSFILE $STATUSFILE.new ; then
                # No change.  Should we send reminder?
                LASTTIME="`stat -c '%Z' $STATUSFILE`"
                NOW="`date +%s`"
                SINCELAST="`expr $NOW - $LASTTIME`"
                if [ $REMIND -le "$SINCELAST" ]; then
                        # Time to send reminder
                        STATUSCHANGE=true
                        mv $STATUSFILE.new $STATUSFILE
                else
                        rm $STATUSFILE.new
                fi
        else
                STATUSCHANGE=true
                mv $STATUSFILE.new $STATUSFILE
        fi
else
        # RAID OK
        if [ -f $STATUSFILE ] ; then
                rm $STATUSFILE
                STATUSCHANGE=true
        fi
fi

if [ true = "$STATUSCHANGE" ]; then
        hostname="`uname -n`"
        (
                cat <<EOF
This is a RAID status update from mpt-status.
The mpt-status program reports that one of the RAIDs changed state:

EOF
                if [ -f $STATUSFILE ] ; then
                        cat $STATUSFILE
                else
                        (mpt-status $PARAMS)
                fi
                echo
                echo "Report from mpt-status on $hostname"
        ) | mail -s "info: mpt raid status change on $hostname" $MAILTO
fi