Paramiko를 사용하여 SSH 반환 코드를 어떻게 얻을 수 있습니까?

Paramiko를 사용하여 SSH 반환 코드를 어떻게 얻을 수 있습니까?

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client = paramiko.SSHClient()
stdin, stdout, stderr = client.exec_command(command)

명령 반환 코드를 얻는 방법이 있습니까?

모든 stdout / stderr를 구문 분석하고 명령이 성공적으로 완료되었는지 여부를 아는 것은 어렵습니다.

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SSHClient는 Paramiko의 더 낮은 수준의 기능에 대한 간단한 래퍼 클래스입니다. API 문서는 나열 recv_exit_status () 채널 클래스의 방법을.

매우 간단한 데모 스크립트 :

$ cat sshtest.py
import paramiko
import getpass

pw = getpass.getpass()

client = paramiko.SSHClient()
client.set_missing_host_key_policy(paramiko.WarningPolicy())
client.connect('127.0.0.1', password=pw)

while True:
    cmd = raw_input("Command to run: ")
    if cmd == "":
        break
    chan = client.get_transport().open_session()
    print "running '%s'" % cmd
    chan.exec_command(cmd)
    print "exit status: %s" % chan.recv_exit_status()

client.close()

$ python sshtest.py
Password: 
Command to run: true
running 'true'
exit status: 0
Command to run: false
running 'false'
exit status: 1
Command to run: 
$

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"낮은 수준"채널 클래스를 직접 호출하지 않는 훨씬 더 쉬운 예입니다 (예 : 명령을 사용 하지 않음client.get_transport().open_session() ).

import paramiko

client = paramiko.SSHClient()
client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
client.connect('blahblah.com')

stdin, stdout, stderr = client.exec_command("uptime")
print stdout.channel.recv_exit_status()    # status is 0

stdin, stdout, stderr = client.exec_command("oauwhduawhd")
print stdout.channel.recv_exit_status()    # status is 127

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JanC 덕분에 예제에 대한 수정 사항을 추가하고 Python3에서 테스트했습니다. 정말 유용했습니다.

import paramiko
import getpass

pw = getpass.getpass()

client = paramiko.SSHClient()
client.set_missing_host_key_policy(paramiko.WarningPolicy())
#client.set_missing_host_key_policy(paramiko.AutoAddPolicy())

def start():
    try :
        client.connect('127.0.0.1', port=22, username='ubuntu', password=pw)
        return True
    except Exception as e:
        #client.close()
        print(e)
        return False

while start():
    key = True
    cmd = input("Command to run: ")
    if cmd == "":
        break
    chan = client.get_transport().open_session()
    print("running '%s'" % cmd)
    chan.exec_command(cmd)
    while key:
        if chan.recv_ready():
            print("recv:\n%s" % chan.recv(4096).decode('ascii'))
        if chan.recv_stderr_ready():
            print("error:\n%s" % chan.recv_stderr(4096).decode('ascii'))
        if chan.exit_status_ready():
            print("exit status: %s" % chan.recv_exit_status())
            key = False
            client.close()
client.close()

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In my case, output buffering was the problem. Because of buffering, the outputs from the application doesn't come out non-blocking way. You can find the answer about how to print output without buffering in here: Disable output buffering. For short, just run python with -u option like this:

> python -u script.py

참고URL : https://stackoverflow.com/questions/3562403/how-can-you-get-the-ssh-return-code-using-paramiko