fqdn2path.py

#!/usr/bin/env python
import sys

if len(sys.argv) != 2:
    print "Usage: %s fqdn" % sys.argv[0]
    sys.exit(1)

fqdn = sys.argv[1]
split = fqdn.split(".")
domain = ".".join(split[-2:])
try:
    subdomain = split[-3]
except:
    subdomain = '_'

print "/var/www/%s/%s/%s" % (domain, subdomain, fqdn)