Show how to read from the nagios datafile

#!/usr/bin/python

import os.path, datetime, sys

import termcolor

datfile = "/opt/local/var/nagios/status.dat"

def main(infile):
  if os.path.exists(datfile) == False:
        print termcolor.colored("Nagios status file not found.  Check file path.", 'red', attrs=['bold'])
        return
    errfound = False
    while 1:
        line = infile.readline()
        if line == "":
            break
        if line[:4] == "host":
            x = host(infile)
            if(x):
                errfound = True
                print x
        if line[:7] == "service":
            x = service(infile)
            if(x):
                errfound = True
                print x
    return errfound

def info(infile):
    while 1:
        line = infile.readline()
        line = line.strip()
        if line == "}":
            break
        param = line.split("=")[0]
        if param == "created":
            t = long(line[8:])
            created = datetime.datetime.fromtimestamp(t)
    return created

def host(infile):
    while 1:
        host_name = ''
        current_state = '0'
        plugin_output = ''
        last_state_change = ''
        line = infile.readline()
        line = line.strip()
        if line == "}":
            break
        param = line.split("=")[0]
        if param == "host_name":
            host_name = line[10:]
        if param == "current_state":
            current_state = line[14:]
        if param == "plugin_output":
            plugin_output = line[14:]
        if param == "last_state_change":
            t = long(line[18:])
            last_state_change = datetime.datetime.fromtimestamp(t).strftime("%m/%d/%Y %I:%M %p")

    if current_state != "0":
        return '[%(date)s] [%(host)s] %(output)s' % dict(
            date    = termcolor.colored(last_state_change, 'yellow'),
            host    = host_name,
            output  = termcolor.colored('HOST DOWN: %s' % plugin_output, 'red'),
        )
    return None

def service(infile):
    current_state = '0'
    last_state_change = ''
    plugin_output = ''
    while 1:
        line = infile.readline()
        line = line.strip()
        if line == "}":
            break
        param = line.split("=")[0]
        if param == "host_name":
            host_name = line[10:]
        if param == "service_description":
            service_description = line[20:]
        if param == "current_state":
            current_state = line[14:]
        if param == "plugin_output":
            plugin_output = line[14:]
        if param == "last_state_change":
            t = long(line[18:])
            last_state_change = datetime.datetime.fromtimestamp(t).strftime("%m/%d/%Y %I:%M %p")

    if current_state != "0":
        return '[%(date)s] [%(host)s] %(output)s' % dict(
            date    = termcolor.colored(last_state_change, 'yellow'),
            host    = host_name,
            output  = termcolor.colored('%s: %s' % (service_description, plugin_output), 'red'),
        )
    return None

if(__name__ == '__main__'):
    infile = open(datfile, "r")
    if(main(infile)):
        sys.exit(1)
    else:
        print termcolor.colored('\n\nno nagios alerts at this time\n\n', 'green')