#!/usr/bin/env python

import os
import sys
import pwd
import socket


def drop():
    uid = os.getuid()
    gid = os.getgid()

    if uid and gid:
        return

    for name in [
        'nobody',
    ]:
        try:
            user = pwd.getpwnam(name)
            nuid = int(user.pw_uid)
            ngid = int(user.pw_uid)
        except KeyError:
            pass

    if not gid:
        os.setgid(ngid)
    if not uid:
        os.setuid(nuid)


if len(sys.argv) != 4:
    print sys.argv[0], '<host> <port> <hex file to create>'
    sys.exit(1)

drop()

# Create a TCP/IP socket
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

# Connect the socket to the port on the server given by the caller
server_address = (sys.argv[1], int(sys.argv[2]))
print >> sys.stderr, 'connecting to %s port %s' % server_address
sock.connect(server_address)

with open(sys.argv[3]) as record:
    try:
        while True:
            count = 0
            even = False
            byte = sock.recv(1)
            if byte == '':
                break
            record.write('%02X' % ord(byte))
            count = (count + 1) % 8
            if not count:
                record.write('\n')
                even = False
            else:
                even != even
                if even:
                    record.write(' ')
    finally:
        sock.close()
