How do I prevent a user to exit using lshell?

Question

I am using lshell in a linux environment.

I can create a session with this shell like

sudo -u dummy /usr/bin/lshell

but even if I add this line to the config file

forbidden       : [';', '&', '|','`','>','<', '$(', '${', 'exit']

dummy is still able to exit the shell.

Is there any way to lock dummy into his lshell session, blocking commands such as "exit" and blocking ctrl+C using lshell?

Why would you want to do this? Perhaps better to just make lshell be the login shell for these users, then no need for sudo and they can't escape it. — John Zwinck, Mar 26 '14 at 14:53
I need to create an ajaxterm instance for localhost, but limited, since I am exposing my localhost session via web. Ajaxterm creates a session using ttycontrol.py, which takes the command line as argument — Leo, Mar 26 '14 at 14:57

score 1 · Answer 1 · answered Mar 26 '14 at 16:38

oh, how fool I am :-)

I could just edit

/usr/lib/python2.6/site-packages/lshell.py

and comment

    #if self.g_cmd in ['quit', 'exit', 'EOF']:
    #    self.log.error('Exited')
    #    if self.g_cmd == 'EOF':
    #        self.stdout.write('\n')
    #    sys.exit(0)

:-)

How do I prevent a user to exit using lshell?

1 Answers1