Question

我是python subprocess的新手。当我想使用python subprocess.Popen.communicate来完成与shell cmd“net ads join -U administrator”的交互密码时，它的输出没有重定向到PIPE，但是在stdout.My代码下面是：

import subprocess

import os
import sys

passwd = b'123456'
cmd = "net ads join -U administrator"
s1 = ("%s\n" % str(passwd)).encode('utf-8')
p1 = subprocess.Popen(cmd1,shell=True,stdin=subprocess.PIPE,stdout=subprocess.PIPE,
                                     stderr=subprocess.PIPE,close_fds=True)
out,err = p1.communicate(s1)
print(out)

当我运行测试时，通信不起作用，输出仍然在标准输出中。

$ python ads.py 
Enter administrator's password:

当我将cmd更改为“ssh root @ ip ls /”时，我也遇到了问题。

我试过pdb，但问题似乎不在这里。有什么建议来处理这个问题吗？谢谢

Answer 1

这是SSH和远程运行命令的片段类，我在我的一个脚本中使用过，请告诉我这是否有效，这里我使用python标准PTY Module进行伪终端。

import pty
import os 
import re

class BaseError(Exception):
    pass

class SSHError(BaseError):
    pass

class Ssh:

    """SSH on the box"""

    def __init__(self, ip, passwd, user, port):
        self.ip = ip
        self.passwd = passwd
        self.user = user
        self.port = port

    def run_cmd(self, c):
        (pid, f) = pty.fork()
        if pid == 0:
            os.execlp(
                "ssh", "ssh", '-o ConnectTimeout=10',
                '-o StrictHostKeyChecking=no',
                '-o UserKnownHostsFile=/dev/null', '-q',
                '-p %d' % self.port,
                self.user + '@' + self.ip, c)
        else:
            return (pid, f)

    def run_scp(self, src, dst):
        (pid, f) = pty.fork()
        if pid == 0:
            os.execlp(
                "scp", "scp", '-o StrictHostKeyChecking=no',
                '-o UserKnownHostsFile=/dev/null', '-q',
                '-P %d' % self.port, "-r", src,
                self.user + '@' + self.ip + ':' + dst)
        else:
            return (pid, f)

    def read(self, f):
        x = ""
        try:
            x = os.read(f, 2024)
        except Exception:
            pass
        return x

    def sshOutputs(self, pid, f):

        output = ""
        readOutLoud = self.read(f)
        m = re.search("authenticity of host", readOutLoud)

        if m:
            os.write(f, 'yes\n')
            while True:
                readOutLoud = self.read(f)
                m = re.search("Permanently added", readOutLoud)
                if m:
                    break

            readOutLoud = self.read(f)
        m = re.search("assword:", readOutLoud)

        if m:
            os.write(f, self.passwd + '\n')
            tmp = self.read(f)
            tmp += self.read(f)
            m = re.search("Permission denied", tmp)
            if m:
                raise SSHError("Invalid passwd")
            p = re.search("[pP]assword", tmp)
            if p:
                raise SSHError("Invalid passwd")

            # passwd was accepted
            readOutLoud = tmp

        while readOutLoud and len(readOutLoud) > 0:
            output += readOutLoud
            readOutLoud = self.read(f)

        os.waitpid(pid, 0)
        os.close(f)

        return output

    def exe_ssh_cmd(self, c):
        (pid, f) = self.run_cmd(c)
        return self.sshOutputs(pid, f)

    def exe_scp_cmd(self, src, dst):
        (pid, f) = self.run_scp(src, dst)
        return self.sshOutputs(pid, f)

subprocess.Popen（“ssh host @ remote cmd”）失败

1 个答案: