Expect error

Rohit_4739 · 12-15-2012, 08:15 AM

Hello Guys,

First of all i would like to say that i am very new to Expect program so please forgive me if this might be a very stupid or basic question. I was writing my 2nd expect script following a tutorial on internet but i didn't execute successfully.
This is my script

Code:

#!/usr/bin/expect

set timeout 20
spawn "./echo.pl"
expect "hello"
send "Not matched entries : <$expect_out(buffer)> \n"
send "Mmatched entries <$expect_out(0,string)> \n"

interact

Here is the error i get when i execute

Code:

send: spawn id exp4 not open
    while executing
"send "Not matched entries : <$expect_out(buffer)> \n""

I did some googling to find out what this error means and how it might be fixed but i did not got any generic results which explained about the error. So i hope somebody here would definatly help me out.

Again please forgive me if it is a silly question because i have no so idea about Expect, i was reading through a tutorial and learning about it.

cbtshare · 12-16-2012, 08:29 PM

I know the website your following, but they have the code wrong.

1st) remove the interact , because the interact should follow some string, read the man page for more.

2nd) you need to set the expect buffers then use puts to echo them to the screen, thats why you get the error no matched entries found.

3rd) If you have expect(0,string) set and puts to print, then this will only work if some part of the string entered matches some part of what was expected.

so this should work.

Quote:

#!/usr/bin/expect
set timeout 20
spawn "./echo.sh"
expect "Hello"

set dif $expect_out(buffer)

puts "this is what you expexted $dif "

The above script will work if what was ran by the script echo.sh has the word "Hello" (case sensitive).If not then it will just echo what was not entered.

Rohit_4739 · 12-17-2012, 12:08 AM

Quote:

Originally Posted by cbtshare

I know the website your following, but they have the code wrong.

1st) remove the interact , because the interact should follow some string, read the man page for more.

2nd) you need to set the expect buffers then use puts to echo them to the screen, thats why you get the error no matched entries found.

3rd) If you have expect(0,string) set and puts to print, then this will only work if some part of the string entered matches some part of what was expected.

so this should work.

The above script will work if what was ran by the script echo.sh has the word "Hello" (case sensitive).If not then it will just echo what was not entered.

Thanks Buddy, i will try.

Rohit_4739 · 12-20-2012, 08:57 AM

Quote:

Originally Posted by cbtshare

I know the website your following, but they have the code wrong.

1st) remove the interact , because the interact should follow some string, read the man page for more.

2nd) you need to set the expect buffers then use puts to echo them to the screen, thats why you get the error no matched entries found.

3rd) If you have expect(0,string) set and puts to print, then this will only work if some part of the string entered matches some part of what was expected.

so this should work.

The above script will work if what was ran by the script echo.sh has the word "Hello" (case sensitive).If not then it will just echo what was not entered.

Hey cbtshare,

Can you direct me to some decent Expect tutorial, i did some googling but could not find what i was looking for. I do not want to go into very much details of the Excpect scipting language, but just want to have some basic knowledge so that i can use in some basic automation tasks.