使用popen和专用的TTY Python运行交互式Bash
我需要使用自己的专用TTY在Python的单独进程中运行交互式Bash实例(我不能使用pexpect)。我使用了类似程序中常见的代码片段:
master, slave = pty.openpty()p = subprocess.Popen(["/bin/bash", "-i"], stdin=slave, stdout=slave, stderr=slave)
os.close(slave)
x = os.read(master, 1026)
print x
subprocess.Popen.kill(p)
os.close(master)
但是当我运行它时,我得到以下输出:
$ ./pty_try.pybash: cannot set terminal process group (10790): Inappropriate ioctl for device
bash: no job control in this shell
运行的轨迹显示一些错误:
...readlink("/usr/bin/python2" title="python2">python2.7", 0x7ffc8db02510, 4096) = -1 EINVAL (Invalid argument)
...
ioctl(3, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS, 0x7ffc8db03590) = -1 ENOTTY (Inappropriate ioctl for device)
...
readlink("./pty_try.py", 0x7ffc8db00610, 4096) = -1 EINVAL (Invalid argument)
该代码段看起来非常简单,Bash是否没有得到所需的东西?这可能是什么问题?
回答:
这是最后对我有用的解决方案(由qarma建议):
libc = ctypes.CDLL('libc.so.6')master, slave = pty.openpty()
p = subprocess.Popen(["/bin/bash", "-i"], preexec_fn=libc.setsid, stdin=slave, stdout=slave, stderr=slave)
os.close(slave)
... do stuff here ...
x = os.read(master, 1026)
print x
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