Townsville Linux Users Group

Hello All,

This script checks if it is being run as root. If it is not then the script exits and logs a FATAL error...

#!/usr/bin/ruby
# This library is standard in ruby 1.8.x
require 'logger'

def do_at_exit(message,exit_code,log)
  at_exit { log.fatal(message) if exit_code == 1 }
  Process.exit(exit_code)
end

log = Logger.new(STDOUT)
log.level = Logger::WARN
do_at_exit("This script must be run as root.\n",1,log) if Process.uid != 0

Here I'm logging to standard out however this can easily be change to a file by doing something like:

log = Logger.new('./test.log')

Example output when logging to STDOUT:
F, [2006-06-13T15:12:48.124511 #25802] FATAL -- : This script must be run as root.

Example output when logging to a file:
# Logfile created on Tue Jun 13 15:14:07 JST 2006 by logger.rb/1.5.2.4
F, [2006-06-13T15:14:07.936568 #25826] FATAL -- : This script must be run as root.

For more info on the Logger class (logging utility) go here

Regards, Bawdo2001.