Shell Programming and Scripting

Hello,

I am performing the follwing line from a unix server:

Code:

expect -c 'spawn ssh otherHost chown -R user:group /usr ; expect password: ; send 123456\n ; interact ;'

I am getting return value 0, an empty stderr and a stdout that says "/usr/... Not owner, /usr/... Not Owner ..".

If I perform the command line "ssh otherHost chown -R user:group /usr" alone - then this message is returned appropriatley with return value !=0 and the error messages in the error stream.

I need to know programmitically if there was an error, and expect (which I need to avoid passing password) doesn't allow me. (A good idea would be to use expect to create sshkeys, and then ssh normally to servers - but I need the servers to have passwords between them).

Anyway how can I be sure an error occured while using expect?

Thank you very much.

You do not need to use expect to login noninteractively.

Google passwordless ssh, you'll find tutorials all over the internet to set up noninteractive login using keys. When you use ssh as designed instead of bruteforcing plaintext passwords into interactive logins with a third-party hacking tool, these problems don't occur.

Figured it - by using echo $? inside of expect commands, that is:

Code:

expect -c 'spawn ssh host "<my commands> ; echo $?"; expect password: ; send 123456\n; interact'

And then I just parse that last line of the result.