Shell Programming and Scripting

Hi scripting gurus,

I have the following EXPECT script, which I created initially using AUTOEXPECT, and then I took some stuff out.

#!/usr/bin/expect -f
#
set force_conservative 1 ;# set to 1 to force conservative mode even if
;# script wasn't run conservatively originally
if {$force_conservative} {
set send_slow {1 .1}
proc send {ignore arg} {
sleep .1
exp_send -s -- $arg
}
}

set timeout -1
spawn su -l --c=pine rusty
match_max 100000
expect -exact "Password: "
send -- "gate\r"
expect -exact " Gt^C G0 Cancel GtRet G0 Accept =7U Gt =5 HOST:
xxxxxxxx ENTER LOGIN NAME \[rusty\] : =6 =5`"
send -- "\r"
expect -exact " G0 =5 Gt = o+ =! G0 Gt =5 HOST: xxxxxx USER:
rusty ENTER PASSWORD: =6 =5`"
send -- "gate\r"

What I want is for the script to ‘su' to RUSTY, with automatic
filling-in of the password, to launch PINE with an automatic
ENTER on the default user name and automatic filling-in of the
password, and then for EXPECT to get out of the way, not testing
for any further keyboard entry.

Also, if possible, I only want EXPECT to test for the above PINE
prompts once.

The script as is gets into PINE okay, but it then immediately
drops back the command line. I tried (re)adding 'expect eof', but
it then doesn't pass my keystrokes through to PINE.

The problem is that I don't know what lines I must add to the
script to tell EXPECT to butt out once it has found and responded
to the above prompts.

Can anyone help?