[ SEA-GHOST MINI SHELL]

#!/usr/bin/env python2.7
from __future__ import print_function
import mmap
import os.path


def mapcount(filename):
    f = open(filename, "r+")
    try:
        buf = mmap.mmap(f.fileno(), 0)
        lines = 0
        readline = buf.readline
        while readline():
            lines += 1
        return lines
    except:
        return 0


with open('/etc/localdomains') as f:
    localdomains = f.read().splitlines()

domainusers = {}
with open('/etc/userdomains') as f:
    for line in f:
       (key, val) = line.split(':')
       domainusers[key] = val.strip()

filter = set(localdomains).intersection(domainusers.keys())

result = 0
for domain, user in domainusers.items():
    if domain in filter:
        fname =  "~{0}/etc/{1}/passwd".format(user, domain)
        fullpath = os.path.expanduser(fname)
        if os.path.isfile(fullpath):
            result += mapcount(fullpath)

print(result)