No-IP DUC Uninstall Script for Mac OS X

no-ip_uninstall.sh

#!/bin/bash

###############################################################################
# Load All Functions                                                          #
###############################################################################

# Function Show script help
function showHelp() {
        echo "No-IP Uninstaller v2.0a"
        echo ""
        echo "Usage: sh $0 [option]"
        echo ""
        echo "Option:
        echo "   -h    This help file"
        echo "   -r    Remove No-IP, no restart"
        echo "   -u    Completely uninstall. Restart required."
        echo ""
        echo "Advised Usage: sh $0 -u"
        echo ""
}

# Function request `sudo` access
function reqSudo() {
sudo -v
}

# Function keep-alive
function keepAlive() {
while true; do sudo -n true; sleep 60; kill -0 "$$" || exit; done 2>/dev/null &
}

# Function Kill `No-IP DUC`
function killNoIP() {
sudo killall "No-IP DUC"
}

# Function Remove `No-IP` only
function noRestart() {
sudo rm -rf /Applications/No-IP\ DUC.app
sudo rm -f /usr/local/bin/noip2
sudo rm -f /usr/local/bin/noip2-boot.sh
echo
echo "No-IP has been removed. Restart or logout is advised."
}

# Function Complete Uninstall
function yesRestart() {
sudo rm -rf /Applications/No-IP\ DUC.app
sudo rm -f /usr/local/bin/noip2
sudo rm -f /usr/local/bin/noip2-boot.sh
sudo shutdown -r now
}

###############################################################################
# Standard UI                                                                 #
###############################################################################

case "$1" in
    '-h'|'-H')
        showHelp
        ;;

    '-r'|'-R')
        reqSudo
        keepAlive
        killNoIp
        noRestart
        ;;

    '-u'|'-U')
        reqSudo
        keepAlive
        killNoIP
        yesRestart
        ;;

    *)
        echo "No-IP Uninstaller v2.0a"
        echo 
        echo "Usage: sh $0 [option]"
        echo 
        echo "Option:"
        echo "   -h    This help file"
        echo "   -r    Remove No-IP, no restart"
        echo "   -u    Completely uninstall. Restart required."
        echo 
        echo "Advised Usage: sh $0 -u"
        echo 
esac

###############################################################################
# Depreciated Code                                                            #
###############################################################################

# UI did not function as expected, depreciated 2013-10-05
:<<supercalifragilisticexpialidocious
# Check on minimal command line argument count
REQ_ARG_COUNT=0
if [[ $# -lt $REQ_ARG_COUNT ]]; then
  echo \"Use \"./$0 -h\" to show help information.\" #>&2
  exit 1
fi

# Start the script by option selected
for option in $*; do
  case \"$option\" in
    -h|-H)
      showHelp
      exit 0
      ;;
   -r|-R)
      reqSudo
      keepAlive
      killNoIP 
      noRestart
      exit 0
      ;;
    -u|-U)
      reqSudo
      keepAlive
      killNoIP
      yesRestart
      exit 0
      ;;
      *)
   esac
done
supercalifragilisticexpialidocious

# :<<supercalifragilisticexpialidocious
# via http://www.unix.com/302124672-post4.html

exit

In the end I changed the whole script around, and it's now in a final revision, and ready to be converted into a Mac App, but this is what I ended up doing:

# Function Show script help
function showHelp {
        clear
        echo "No-IP Uninstaller $version"
        echo 
        echo 'Usage: sh $1 [option]'
        echo 
        echo 'Option:'
        echo '   -h    This help file'
        echo '   -r    Remove No-IP, no restart'
        echo '   -u    Completely uninstall, restart required'
        echo 
        echo "Advised Usage: sh $0 -u"
        echo 
}   # end of showHelp

The updated file looks nothing like the version above, so it's hard to compare. What a shame.