Interative shell paramiko how to read input like the exec_command

Question

When using paramiko exec_command without the interactive shell, it's really easy to get the output.

However I need to use the interactive shell and it seems a pain to read the output of a single command. I couldn't find a demo or any example of this.

I tried using something like : Implement an interactive shell over ssh in Python using Paramiko?

But it's in really bad shape.

score 1 · Answer 1 · answered May 03 '16 at 10:11

1

You don't have to use paramiko for it.

Just use paramiko to open passwordless ssh connection and then implement your method, using subporcess module.

For example:

def run_shell_remote_command(remote_host, remote_cmd):
        p = subprocess.Popen(['ssh', '-nx', remote_host, remote_cmd], stdout=subprocess.PIPE,
                             stderr=subprocess.PIPE)
        stdout, stderr = p.communicate()
        if p.returncode != 0:
            raise RuntimeError("%r failed, status code %s stdout %r stderr %r" % (
                remote_cmd, p.returncode, stdout, stderr))
        return stdout.strip()  # This is the stdout from the shell command

answered May 03 '16 at 10:11

Samuel

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The problem with that is I have to run a lot of command in sequence, and it's too slow/useless to open a process for every command. – Maxime Roussin-Bélanger May 03 '16 at 23:33
Then I guess some RPC library may suite your needs. I'd used python's `RPyc`. If you interested I'll post usage example here. – Samuel May 03 '16 at 23:44
What do you think of using netcat on remote and communicating with it? – Maxime Roussin-Bélanger May 15 '16 at 22:23

misha · Answer 2 · 2016-05-03T22:25:13.350

0

After using the solution given in the link, what do you mean by "it's in really bad shape"?

The output had some unnecessary characters so I removed them, please see the edited solution.

edited May 03 '16 at 22:25

answered May 03 '16 at 09:58

misha

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I think it should be in a class to be easily reusable anywhere. – Maxime Roussin-Bélanger May 03 '16 at 23:34
I agree, but it can be very easily done in a few minutes. If you have problems with making it a class please say so and I'll edit the code. – misha May 04 '16 at 05:29
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I updated the code according to your request. Now it's a completely reusable class. – misha May 11 '16 at 21:18
yes better but I don't see the _print_exec_out being really useful at all. Probably better to use a Logger. – Maxime Roussin-Bélanger May 15 '16 at 22:23
You were right, no need for _print_exec_out in the solution. I updated the code. thanks – misha Jun 05 '16 at 21:06

Interative shell paramiko how to read input like the exec_command

2 Answers2