#!/usr/bin/python

DESCRIPTION="Script to retreive info about local cell"

USAGE='''Usage:
cellinfo                #usage/help
cellinfo shortname      #m1/m2/m3/...
cellinfo name           #pareto,infrae,...
cellinfo group          #pareto,infrae,...
cellinfo fqdn           #zopedev.pareto.nl, infrae.com, ...
'''

NEEDS='''This Script needs:
/etc/cell/shortname                     #with for example: m4
/etc/cell/name                          #with for example: infrae
/etc/cell/group                         #with for example: infrae
'''

import string,re,sys,os

DEBUG=0
BASEDIR='/etc/cell'

# FUNCTIONS:
def main():
    REQUEST=getcommands()

    debug('REQUEST='+REQUEST)
    if REQUEST == "shortname":
        cat(REQUEST)
    elif REQUEST == "name":
        cat(REQUEST)
    elif REQUEST == "fqdn":
        cat(REQUEST)
    elif REQUEST == "group":
        cat(REQUEST)
    elif REQUEST == "":
        sys.stdout.write(DESCRIPTION + '\n\n' + USAGE+ '\n')
    sys.exit(0)

def cat(FILENAME): #simple way
    if os.access(BASEDIR+'/'+FILENAME,os.F_OK):
        print open(BASEDIR+'/'+FILENAME).read().strip()

def debug(STRING):
    if DEBUG:
        sys.stderr.write('DEBUG: '+STRING+'\n')
        
def getcommands():
    REQUEST=""
    global DEBUG

    sys.argv.pop(0)      #den ersten eintrag weg, nur die nachfolgenden enthalten optionen
    while 1:
        try:
            arg=sys.argv.pop(0)
        except IndexError:
            break
        if arg == '-d' or arg == '--debug' or arg == '-debug':
            DEBUG=1
        else:
            REQUEST=arg

    return REQUEST
    
# START POINT:
if __name__ == "__main__":
    main()