python - 在远程服务器上运行命令以秒为单位查找正常运行时间

Question

这是我目前所拥有的:

#!/usr/bin/python

import sys
import os
import subprocess
from subprocess import check_output
import time
import sh
from sh import sshpass
import re
import time, datetime
check_time = 0

with open("log.txt", "a") as f:
    while 1:
        #out = check_output(["sshpass", "-p", "pass", "ssh",
        #                    "theo@localhost", "\"/usr/bin/cat",
        #                    "/proc/uptime\""])
        #print (out)
        #out = str(out)
        uptime = sh.Command("/usr/bin/sshpass")
        result = uptime("-p", "pass", "ssh", "theo@localhost", "\"cat",
                        "/proc/uptime\"")
        result = str(result)
        print (result)
        result = result.split(' ', 1)[0]
        print (result)
        f.write(result)
        result_int = int(result)
        if result_int > check_time:
            print("it rebooted", result_int, "minutes ago")

        time.sleep(5)

结果:

checking uptime
Traceback (most recent call last):
  File "./uptime.py", line 23, in <module>
    result = uptime("-p", "pass", "ssh", "theo@localhost", "\"cat", "/proc/uptime\"")
  File "/usr/lib/python3.5/site-packages/sh.py", line 1021, in __call__
    return RunningCommand(cmd, call_args, stdin, stdout, stderr)
  File "/usr/lib/python3.5/site-packages/sh.py", line 486, in __init__
    self.wait()
  File "/usr/lib/python3.5/site-packages/sh.py", line 500, in wait
    self.handle_command_exit_code(exit_code)
  File "/usr/lib/python3.5/site-packages/sh.py", line 516, in handle_command_exit_code
    raise exc(self.ran, self.process.stdout, self.process.stderr)
sh.ErrorReturnCode_127:

  RAN: '/usr/bin/sshpass -p pass ssh theo@localhost "cat /proc/uptime"'

  STDOUT:


  STDERR:
zsh:1: no such file or directory: cat /proc/uptime

你可以看到我有两次尝试，一次使用 sh 库，一次使用 check_output，两者都导致相同的错误，即无法运行 /usr/bin/cat/过程/正常运行时间。

然而，正如您在回溯的末尾所看到的:

RAN: '/usr/bin/sshpass -p pass ssh theo@localhost "cat /proc/uptime"'

这似乎是一个完全有效的行，如果我将它复制粘贴到终端中，它就可以工作。

有什么想法吗？如果我只是输入“正常运行时间”，该命令确实有效，而不是编辑它的输出以获取以秒为单位的时间，我认为这样做会更容易(至少我认为 应该是):)

我正在使用 python 3.5.2

Answer 1

根据输出，您需要将正常运行时间线修改为如下所示:

        result = uptime("-p", "pass", "ssh", "theo@localhost", "cat",
                    "/proc/uptime")

看起来“cat/proc/uptime”在您的原始代码中被 ssh 解释为一个参数。