How to print the name of an expect script

The interact command in the expect here-doc was the problem. I needed to wait for EOF instead:

#! /bin/bash

# this function runs a command like 'ssh' and provides the password
function with_password {
expect << END
set timeout 900
spawn $2
expect *assword:*
send -- $1
expect EOF
END
}

# run "long_running_command" on the remote server
with_password my_password "ssh my_user@some-server long_running_command"

# rsync some data to the remote server
with_password my_password "rsync /some/dir my_user@some-server:/remote/dir"

# run some other random command
with_password my_password "ssh my_user@some-server some_other_command"

The interact command seem to work sometimes when the ssh/rsync command closed the input at the correct time (maybe?), but it wasn't reliable.

According to http://oreilly.com/catalog/expect/chapter/ch03.html, you can simply set timeout to -1 to disable the timeout mechanism.