CODEWITHSUNDEEP
tclexpect
Siddhartha Sen
Siddhartha Sen

Reputation: 81

Expect: using a variable as expect string

Let me say I have something like....

set timeout 10
expect {
    "login:"    {
        send "$USER\r"
        exp_continue
    }
    "assword:"  {
        send "$PASSWORD\r"
        exp_continue
    }
    $PROMPT {
        send_user "Successfully logged in."
    }
}

I have a problem with defining the $PROMPT

All these give an error...

set PROMPT   {-re ">|:"}
set PROMPT   "-re \">|:\""
set PROMPT   {-regexp ">|:"}

I get error like...

bad flag "-regexp ":|>"": must be -glob, -regexp, -exact, -notransfer, -nocase, -i, -indices, -iread, -timestamp, -timeout, -nobrace, or --

What is the correct way of assigning the variable and (more importantly) what is the concept that I have violated for this error to happen?

Thanking You in advance!

Upvotes: 0

Views: 687

Answers (1)

pynexj
pynexj

Reputation: 20688

You should write like this:

set PROMPT {>|:}
expect {
  -re $PROMPT { ... }
  ...
}

And to be safer you better define a more precise PROMPT as some commands may also output chars like > or :.

Upvotes: 1

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