DNSimple hostname updater on OS X (prior to Yosemite)

DNSimpleUpdater

#!/bin/bash
. /etc/rc.common
 
AUTH_EMAIL='' # dnsimple account email address
AUTH_TOKEN='' # dnsimple api token
DOMAIN_ID='' # domain name or id
RECORD_ID='' # record id to update
IP="`curl http://icanhazip.com/`"

foo ()
{
    curl -H "X-DNSimple-Token: $AUTH_EMAIL:$AUTH_TOKEN" \
         -H "Accept: application/json" \
         -H "Content-Type: application/json" \
         -X PUT \
         -d "{\"record\":{\"content\":\"$IP\"}}" \
         https://api.dnsimple.com/v1/domains/$DOMAIN_ID/records/$RECORD_ID
}

StartService ()
{
    foo
}

# StopService ()
# {
# }

RestartService ()
{
    foo
}

RunService "$1"

StartupParameters.plist

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>Description</key>
	<string>DNSimple Dynamic Local IP Updater</string>
	<key>OrderPreference</key>
	<string>None</string>
	<key>Provides</key>
	<array>
		<string>DNSimpleUpdater</string>
	</array>
</dict>
</plist>

1. Fork this gist
2. Edit variables
3. cd /Library/StartupItems
4. Clone fork to a directory named "DNSimpleUpdater"
5. sudo /sbin/SystemStarter start "DNSimpleUpdater"
6. Verify results on DNSimple website

OS X Yosemite removed the SystemStarter executable; this approach has been deprecated and https://gist.github.com/digitaljhelms/a1f1d9e2d8aaa3838571 should be used on systems running OS X Yosemite and higher.