Expect script error : send: spawn id exp4 not open


Login or Register for Dates, Times and to Reply

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Expect script error : send: spawn id exp4 not open
# 1  
Expect script error : send: spawn id exp4 not open

Hi,

I am executing a expect script in while loop for doing telnet on list of servers stored in file as below :
expect script :
Code:
#!/usr/bin/expect -f
set timeout 20
set ip [lindex $argv 0]
set port [lindex $argv 1]
if {[llength $argv] == 0} {
  send_user "Usage: scriptname ip port\n"
  exit 1
}
#exp_internal 1
log_user 0
spawn telnet $ip $port
sleep 5
expect {
timeout { send_user "\nTelnet to $ip on $port was Unsuccessfull\n";exit 1 }
"'^]'"
}
send "\x1D"
expect "telnet> "
send "quit\r"
send_user "\nTelnet to $ip on $port was successfull\n"
expect eof

bash script for looping expect script :
Code:
#!/bin/bash
n=`wc -l /tmp/DSlist | awk '{ print $1 }'`
i=1
while [ $i -le $n ]
do
line=`head -$i /tmp/DSlist | tail -1`
ip=`echo $line | cut -f 1 -d ' '`
port=`echo $line | cut -f 2 -d ' '`
./test1.sh $ip $port
sleep 1
i=`expr $i + 1`
done

script is getting executed properly but getting message as below in between the script :
Code:
send: spawn id exp4 not open
    while executing
"send "\x1D""
    (file "./test1.sh" line 17)

can someone please let me know where i am going wrong. or are there any additional steps that i have to include in my script to avoid this error.

---------- Post updated at 06:29 AM ---------- Previous update was at 01:48 AM ----------

can someone please assist here..
# 2  
We are not "on call". If someone doesn't answer your question immediately, and you have no further information to provide, wait! I didn't get here just because you bumped it.

"spawn id exp4 not open" is the message expect gives when the thing you're communicating with, telnet in this case, dies while you're trying to use it. Try telneting to that IP / port manually and see what it does.

Your shell script can probably be made far more efficient -- you don't need the help of head, tail, and cut to read and tokenize lines from a file one by one, there's a command just for that.

Code:
while read ip port
do
        echo "$ip $port"
done < /tmp/DSlist

This User Gave Thanks to Corona688 For This Post:
# 3  
Does the error still occur if you remove the `sleep 5` after the spawn?
# 4  
@Corona688 thanks for the shortening while loop that has worked. Also the error was due to additional space in DSlist file after one of the ips. so the expect script posted in my question is final and working one.
This User Gave Thanks to omkar.jadhav For This Post:
Login or Register for Dates, Times and to Reply

Previous Thread | Next Thread
Thread Tools Search this Thread
Search this Thread:
Advanced Search

Test Your Knowledge in Computers #485
Difficulty: Medium
A computer operating system loads an executable file into a call stack on a hard disk.
True or False?

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Couldn't read packet: Connection reset by peer send: spawn id exp4 not open while executing

Hi All, I am having an issue with my script which I am using to get files from a remote server. In my script I am going to server:- REMOTESERVER and directory:- /Interface/Upload, and then getting files from there to my local server directory:- /ftp/jail_nextview_LMS/home/nextview_LMS/outbox. ... (1 Reply)
Discussion started by: Hero6438
1 Replies

2. Shell Programming and Scripting

Expect: spawn id exp5 not open while executing "expect "$" { send "sudo su -\r" }"

Hi All, i am trying to ssh to a remote machine and execute certain command to remote machine through script. i am able to ssh but after its getting hung at the promt and after pressing ctrl +d i am gettin the out put as expect: spawn id exp5 not open while executing "expect "$" {... (3 Replies)
Discussion started by: Siddharth shivh
3 Replies

3. Shell Programming and Scripting

Error in spawn and expect for password

Code Broken!! "cod generator ip=$loja" expect -c " # set timeout -1 set timeout 18 spawn scp -C /etc/samba/arkivo.sh root@$loja:/etc/samba/ expect { -re "*yes/no*"{ send "yes\r" exp_continue } -re "*password:*" { send "senha\r" expect \"*#*\"}} ssh root@$loja expect \"*password:*\"... (4 Replies)
Discussion started by: hrenechen
4 Replies

4. Shell Programming and Scripting

Using spawn and expect getting error

#!/bin/sh # # set -x stty -echo; read -p "Input password:" A; stty echo; echo; for HOST in `cat elc.hosts.list` do # echo "Connecting to $HOST" expect -c "set timeout -1;\ spawn sshr $HOST -l root \"mkdir /perfstat;\";\ match_max 100000;\ expect *'/root/.ssh/id_dsa':*;\ send --... (1 Reply)
Discussion started by: madlot
1 Replies

5. Shell Programming and Scripting

Using expect command, spawn will not start sftp process

Hi all, I have a script that runs sftp with expect so I can login and send a file in a cronjob. I've installed this on a couple other servers and it has been fine. However, this time on this machine, it seems to be giving me an issue. It won't move past the spawn sftp command and return a... (3 Replies)
Discussion started by: ltyrrell
3 Replies

6. Shell Programming and Scripting

Can 'spawn' command be used more than once in an expect script ?

Can 'spawn' script be used more than once in a given expect script ?? What I'm trying to do is, first log-into a remote server through one 'ssh' spawn com and then from there log-into another server using a secod 'ssh' spawn command. But this approach is not working... the second ssh attempt... (1 Reply)
Discussion started by: clakkad
1 Replies

7. Shell Programming and Scripting

Expect Script Error invalid spawn id (6)

Hi everybody, We are trying to connect to a server and to a router using an .expect script that automatically authenticate the username and password needed. The error is that we cannot connect to the server using ssh AND we cannot connect to the router using either telnet or go commands from the... (1 Reply)
Discussion started by: omoyne
1 Replies

8. AIX

send: spawn id exp3 not open

Hi, AIX 5.3 Trying to implement script that change oracle password. Getting following errors: send: spawn id exp3 not open while executing "send "xxx\r" Any idea? (4 Replies)
Discussion started by: groosha
4 Replies

9. Shell Programming and Scripting

Expect: How to read buffer for spawn

Hi All, I have to write one expect script to login to one system. I am using set timeout -1 match_max 100000 spawn ssh root@hostname Now when I do spawn ssh to that host it send some warning message and one challenge Challenge: 111-2345 I need to read this challenge value and has... (1 Reply)
Discussion started by: Lokesh Agrawal
1 Replies

10. Shell Programming and Scripting

Expect: Beginner help with spawn and expect

Hello hello, did a quick search and didn't turn up anything helpful. I've got a book I'm sure has the answers, but I don't think I'll have time to finish it before this all has to work, so here goes~ if this isn't a good place to post and someone could direct me to another forum I'd appreciate... (1 Reply)
Discussion started by: Vryali
1 Replies

Featured Tech Videos