1 # encoding: utf-8 2  3 import os 4 import sys 5 import time 6  7  8 def child(master, slave): 9     os.close(master)10     os.dup2(slave, 0)11     os.dup2(slave, 1)12     os.dup2(slave, 2)13     os.execvp("/bin/bash", ["bash", "-l", "-i"])14 15 16 def parent():17     master, slave = os.openpty()18     new_pid = os.fork()19     if new_pid == 0:20         child(master, slave)21 22     time.sleep(1)23     os.close(slave)24 25     os.write(master, "fg\n")26     time.sleep(1)27     _ = os.read(master, 1024)28 29 30     os.write(master, sys.argv[1] + "\n")31     time.sleep(1)32     lines = []33     while True:34         tmp = os.read(master, 1024)35         lines.append(tmp)36         if len(tmp) < 1024:37             break38     output = "".join(lines)39     output = "\n".join(output.splitlines()[1:])40     print output41 42 parent()