Paramiko and Pseudo-tty Allocation
I'm trying to use Paramiko to connect to a remote host and execute a number of text file substitutions.
i, o, e = client.exec_command("per开发者_开发百科l -p -i -e 's/" + initial + "/"
+ replaced + "/g'" + conf);
Some of these commands need to be run as sudo, which results in:
sudo: sorry, you must have a tty to run sudo
I can force pseudo-tty allocation with the -t switch and ssh.
Is it possible to do the same thing using paramiko?
Actually it's quite simple. Just:
stdin, stdout, stderr = client.exec_command(command, get_pty=True)
The following code works for me:
#!/usr/bin/env python
import paramiko
ssh = paramiko.SSHClient()
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
ssh.connect('localhost',username='root',password='secret')
chan = ssh.get_transport().open_session()
chan.get_pty()
chan.exec_command('tty')
print(chan.recv(1024))
This was just assembled from looking at a few examples online... not sure if its the "right" way.
I think you want the invoke_shell
method of the SSHClient
object (I'd love to give a URL but the paramiko docs at lag.net are frame-heavy and just won't show me a specific URL for a given spot in the docs) -- it gives you a Channel
, on which you can do exec_command
and the like, but does that through a pseudo-terminal (complete with terminal type and numbers of rows and columns!-) which seems to be what you're asking for.
According to the sudo manpage:
The -S (stdin) option causes sudo to read the password from the standard input instead of the terminal device. The password must be followed by a newline character.
You can write to the stdin because it is a file object with write():
import paramiko
client = paramiko.client.SSHClient()
client.set_missing_host_key_policy(paramiko.client.AutoAddPolicy())
client.connect(hostname='localhost', port=22, username='user', password='password')
stdin, stdout, stderr = client.exec_command('sudo -S aptitude update')
stdin.write('password\n')
stdin.flush()
# print the results
print stdout.read()
client.close()
精彩评论