So I wanted to automate my SSH logins.
The host I'm with doesn't allow key authentication on this server, so I had to be more inventive.
I don't know much about shell scripting, but some research showed me
the command 'expect' and some scripts using it for exactly this purpose. I set up a script and ran it, it worked perfectly to login.
#!/usr/bin/env expect -f
set password "my_password"
match_max 1000
spawn ssh -p 2222 "my_username"@11.22.11.22
expect "*?assword:*"
send -- "$password\r"
send -- "\r"
expect eof
Initially, it runs as it should.
Last login: Wed May 12 21:07:52 on ttys002
esther:~ user$ expect expect-test.exp
spawn ssh -p 2222
[email protected]
[email protected]'s password:
Last login: Wed May 12 15:44:43 2010 from 20.10.20.10
-jailshell-3.2$
But that's where
the success ends.
Commands do not work, but hitting enter just makes a new line.
Arrow keys and other non-alphanumeric keys produce symbols like '^[[C', '^[[A', '^[OQ' etc.[1]
No other prompt appears except
the two initially created by
the expect script.
Any ignored commands will be executed by my local shell once expect times out.
An example:
-jailshell-3.2$ whoami
ls
pwd
hostname
(...time passes, expect times out...)
esther:~ user$ whoami
user
esther:~ ciaran$ ls
Books Documents Movies Public
Code Downloads Music Sites
Desktop Library Pictures expect-test.exp
esther:~ ciaran$ pwd
/Users/ciaran
esther:~ ciaran$ hostname
esther.local
As I said, I have no shell scripting experience, but I think it's being caused because I'm still "
inside of" expect, but not "
inside of" SSH. Is there any way to terminate expect once I've logged in, and have it hand over
the SSH session to me?
I've tried commands like 'close' and 'exit', after " send -- "\r" ". Yeah, they do what I want and expect dies, but it vindictively takes
the SSH session down with it, leaving me back where I started. What I really need is for expect to do its job and terminate, leaving
the SSH session back in my hands as if I did it manually.
All help is appreciated, thanks.
[1] I know there's a name for this, but I don't know what it is. And this is one of those frightening things which can't be googled, because
the punctuation characters are ignored. As a side question, what's
the story here?
