Sending SMS notifications of md device failure

I just wrote a script to send sms from a unix machine and I thought it would be a good idea to add an sms notification to mdadm. Therefore I wrote this script, called handle-md-event:

#!/bin/sh
 
event=$1
device=$2
related=$3
# Don't use the FQDN, because on machines with misconfigured DNS, it can take a long time to retrieve it and result in an error
hostname=`hostname`
 
mailto="root"
 
if [ -z $related ]; then
  related="none specified"
fi
 
if [ `echo $event|grep -E -i "^rebuild[0-9]{2}$"` ]; then
  event="$event% done"
  percentage_notice="true"
fi
 
message="mdadm on $hostname reports an event with device: $device: $event. Related devices: $related."
 
# Don't sms on Rebuild20, Rebuild40, Rebuild60 events.
# And check if /proc/mdstat actually contains an [U_] pattern, so that you only get SMSes on failures and not just random events.
if [ "$percentage_notice" != "true" ] && [ -n "`grep '\[[^]]*_[^]]*\]' /proc/mdstat`" ]; then
  notify_sms -m "$message"
fi
 
message="$message Because there is/was a bug in the kernel, the normal routine checkarray function also reports resync. Here is /proc/mdstat for you to check whether there is a drive failure: \n\n`cat /proc/mdstat`"
echo -e "$message"|mail -s "Mdadm on $hostname reports an event" $mailto

In /etc/mdadm.conf you need to add the following line:

PROGRAM /usr/local/sbin/handle-md-event

If you already have a handler defined, you could write a wrapper script that does both.