boot-shutdown

boot-shutdown.sh

#!/bin/bash
# by iiitum

EMAIL=""

function shutdown()
{
    EVENT_TIME=$(date +%Y/%m/%d-%H:%M:%S)
    ME=`whoami`
    SUBJECT="System Shutdown: ${EVENT_TIME}"
    BODY="[${ME}] Received a signal to shutdown"
    echo ${BODY} | mailx -s "${SUBJECT}" "$EMAIL"
}

function startup()
{
    EVENT_TIME=$(date +%Y/%m/%d-%H:%M:%S)
    ME=`whoami`
    SUBJECT="System Startup: ${EVENT_TIME}"
    BODY="[${ME}] Starting..."
    echo ${BODY} | mailx -s "${SUBJECT}" "$EMAIL"
}

if [ "$1" == "startup" ]; then
    startup
else
    shutdown
fi

boot.shutdown.service.plist

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
    <dict>
        <key>Label</key>
        <string>boot.shutdown.service</string>

        <key>ProgramArguments</key>
    	<array>
    		<string>boot-shutdown.sh</string>
    		<string>startup</string>
    	</array>

        <key>RunAtLoad</key>
        <true/>
    </dict>
</plist>