pwn.ssh can't work well on server with python2

[brealid]

Version

pwntools==4.12.0

Description

When I try to use pwn.ssh to connect to a server (let's call it SA), the process gets stuck and keeps waiting indefinitely.

Upon investigation, I discovered that in ssh.py, line 945, the script being executed on SA is as follows:

        script = r"""
#!/usr/bin/env python
import os, sys, ctypes, resource, platform, stat

This script does not explicitly specify the use of Python 3. When I logged into SA, I found that /usr/bin/env python indeed calls Python 2, not Python 3.

To resolve this, I suggest renaming python to python3 in this script.

[peace-maker]

The environment probe script shouldn't rely on any python3 specifics though. Can you paste some debug information on where it stopped working?