Question

我正在尝试使用paramiko远程执行多个命令，但是recv_ready()没有返回正确的值。
例如，在pwd \n命令之后，它将连续报告通道尚未就绪（显然是假的）。对于某些命令，它可以正常工作ls。我正在做什么有什么问题，或者paramiko有问题吗？

import paramiko
import re
import time

def sudo_ssh(hostname, usernameIn, passIn, cmd):

    # Create an SSH client
    client = paramiko.SSHClient()

    # Make sure that we add the remote server's SSH key automatically
    client.set_missing_host_key_policy(paramiko.AutoAddPolicy())

    # Connect to the client
    client.connect(hostname, username=usernameIn, password=passIn)

    # Create a raw shell
    channel = client.invoke_shell()


    # Send the sudo command
    for command in cmd:
        print("CMD= " + command + "\n")
        time.sleep(1)

        # wait until channel is ready
        while not channel.recv_ready() :
            print("NOT READY " + str(channel.recv_ready()) + "\n \n")
            time.sleep(1)

        # Send the command
        channel.send(command)
        channel.send("\n")

        # Wait a bit, if necessary
        time.sleep(1)

        # Flush the receive buffer
        receive_buffer = channel.recv(4096)

        # If promted send the sudo pass
        if re.search(b".*\[sudo\].*", receive_buffer): 
            time.sleep(1)
            print(" TYPING SUDO PASSWORD .... \n")
            channel.send( "sudoPass" + "\n" )
            receive_buffer = channel.recv(4096)

        # Print the receive buffer, if necessary
        print(receive_buffer)

    print("Executed all of the commands. Now will exit \n")
    client.close()


com = []
com.append("sudo ls")
com.append("cd /home/user/Downloads")
com.append("sleep 5")
com.append("ls")
com.append("pwd")
com.append("cd /opt/")
sudo_ssh("myhost.com", "user", "pass", com)

Answer 1

recv_ready方法是检查信道数据是否准备好读取，即数据是否被缓冲。它不会检查频道本身是否准备就绪，请参阅 - recv_ready()。

因此，您应该在recv_ready()之前移动receive_buffer = channel.recv(4096) while循环以使其正常工作。

Paramiko recv_ready（）返回false值

1 个答案: