#! /usr/bin/env python

import sys
import os
import pty
import termios
import fcntl

def fork_xterm(master_fd, slave_fd):
    pid = os.fork()
    if pid == 0:
        os.close(slave_fd)
        helper = os.path.join(
                    os.path.dirname(sys.argv[0]), 'interconnect_pty.py')
        argv = ['xterm', '-e', 'python', helper, '--master_fd', str(master_fd)]
        os.execvp(argv[0], argv)

    os.close(master_fd)
    return pid

def exec_pgm(slave_fd, argv):
    os.dup2(slave_fd, 0)
    os.dup2(slave_fd, 1)
    os.dup2(slave_fd, 2)
    os.close(slave_fd)
    os.execvp(argv[0], argv)

SET_CONTROLLING_TERMINAL = False

def main():
    master_fd, slave_fd = pty.openpty()
    pid = fork_xterm(master_fd, slave_fd)
    argv = sys.argv[1:]
    if SET_CONTROLLING_TERMINAL:
        argv[0] = os.path.abspath(argv[0])
        pid = os.fork()
        if pid == 0:
            os.setsid()
            fcntl.ioctl(slave_fd, termios.TIOCSCTTY)
            exec_pgm(slave_fd, argv)
    else:
        exec_pgm(slave_fd, argv)

if __name__ == '__main__':
    main()