1 def ssh_login(ip, user="root", passwd=None, prompt="]#", port="22", log_file=None, raise_exception=True): 2 """ 3 Login remote host with ssh 4 return pexpect.spawn 5 """ 6 cmd = "ssh %s@%s -p %s" % (user, ip, port) 7 p = pexpect.spawn(cmd) 8 p.logfile = open_log_file(log_file) 9 10 Flag = True 11 index = p.expect(["[Pp]assword:", "(yes/no)", prompt, pexpect.EOF]) 12 if index == 0: 13 p.sendline(passwd) 14 elif index == 1: 15 p.sendline("yes") 16 p.expect("[Pp]assword:") 17 p.sendline(passwd) 18 elif index == 2: #already login 19 Flag = False 20 else: 21 if raise_exception: 22 raise Exception("Unable to login, please try again later.") 23 else: 24 return None 25 if Flag: 26 index = p.expect([prompt, "[Pp]assword:"]) 27 if index == 1: 28 if raise_exception: 29 raise Exception("Wrong password to remote host") 30 else: 31 return None 32 return p #ssh successfully and return a pexpect.spawn 33 34 def open_log_file(log_file, mode="a"): 35 if log_file is None: 36 return None 37 if isinstance(logfile, str) or isinstance(log_file, unicode): 38 return open(log_file, mode)