#!/usr/bin/python3

import sys
import fishdescriptor.fish
import re

donor = None

usage =
'''
fishdescriptor <pid> <action>... [-p|--pid <pid> <action>...]

<action>s
  <there-fd>[=<here>]
          fish the openfile referenced by descriptor <there-fd> in
          (the most recent) <pid> and keep a descriptor onto it;
          and, optionally, give it the number <here> for exec
  exec <program> [<arg>...]
          execute a process with each specified numeric <here>
          as an actual fd
  sockinfo
          calls getsockname/getpeername on the most recent
          <there-fd>

  -p|-pid <pid>
          now attach to <pid>, detaching from previous pid
'''

def set_donor(pid_arg):
    pid = int(pid_arg)
    if donor is not None: donor.detach()
    donor = fishdescriptor.fish.Donor(pid)

def process_args():
    def arg_matches(regexp):
        nonlocal m
        m = re.search(regexp, arg)
        return m

    arg_ix = 0
    def next_arg():
        sys.argv[arg_ix] = 

    while arg_ix < len(sys.argv):
        arg = next_arg()
        if arg_matches(r'^-p(\d+)') or
           arg_matches(r'^--pid=(\d+)$')
            set_donor(m.groups(1)[0])
            
            pid = 
(?:-p|^--pid(?:=|$))(\d*)$'):
            
            pid = int(m.groups(1)[0])
        elif arg_matches(r'^(?:-p|^--pid=)(\d+)$'):
            
        if expecting_pid:
            set_donor(arg)
        el
        elif arg_matches(r'\d+
            
    parser = OptionParser(usage=usage, )

    parser.add_option("-p", "--pid", type='int', callback=set_donor)
    parser.add_option(

pid = int(sys.argv[1])
fds = [int(x) for x in sys.argv[2:]]

d = fishdescriptor.fish.Donor(pid)
r = d.fish(fds)
print(repr(r))