#!/usr/bin/python
# Usage: check_nick server nick hostname
# Example: check_nick irc.freenode.net ubotu irc/bot/ubotu
#
# Placed in the public domain

import irclib, os, sys

server, nick, host = sys.argv[1:]

def whois(c, e):
    c.whois([nick])

def on_whois(c, e):
    args = e.arguments()
    if args[0] == nick and args[2] == host:
	print "%s was found on %s" % (nick, host)
        sys.exit(0)
    else:
        print "%s was taken over: %s" % (nick,str(args))
        sys.exit(1)

def on_nosuchnick(c, e):
    print "%s is missing" % nick
    sys.exit(2)

def abort():
    print "Can't connect to %s" % server
    sys.exit(3)

c = irclib.SimpleIRCClient()
c.connect(server, 6667, 'nagios_%s' % os.getpid())
c.ircobj.add_global_handler("endofmotd", whois, 0)
c.ircobj.add_global_handler("whoisuser", on_whois, 0)
c.ircobj.add_global_handler("nosuchnick", on_nosuchnick, 0)
c.ircobj.execute_delayed(30, abort)
c.start()