Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Expect scripting telnet stop on bad username or password
Top Forums Shell Programming and Scripting Expect scripting telnet stop on bad username or password Post 302714837 by spacebar on Friday 12th of October 2012 10:38:12 PM
Old 10-12-2012
Ok, Try this:
Code:
#!/usr/bin/expect
set timeout 10
set host     [lindex $argv 0]
set user     [lindex $argv 1]
set password [lindex $argv 2]

proc login {host user password} {
  expect {
    "nkown host"                        { puts "***Host($host) is unkown."; return 1 }
    "onnection refused"                 { puts "***Connection was refused to host($host)."; return 1 }
    "Escape character is '^]'."         { exp_continue }
    -re "Login:.*$|login:.*$"           { exp_send "$user\r"; exp_continue }
    -re "Password:.*$|password:$"       { exp_send "$password\r"; return 0 }
    timeout                             { puts "***Telnet timed out waiting for host($host)."; return 1 }
  }
}

catch { spawn -noecho telnet $host }
set login_results [login $host $user $password]

# If successful connection, continue, else exit denoting error occured.
if { $login_results == 0 } {
  puts "\r***Connected; You are on the command line..."
  interact
  # Successful telnet session so exit with zero status
  exit 0
}
# Error connecting to host so exit with non-zero status
exit 1

This User Gave Thanks to spacebar For This Post:
leemalloy
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

username password in script

Can we write a script to telnet to a unix server from unix with the username and password hardcoded in the script?? something like ssh a@b -p password ??? (5 Replies)
Discussion started by: roshanjain2
5 Replies

2. UNIX for Dummies Questions & Answers

how to stop telnet access to AIX box

how do I remove telnet access to my AIX (5.3) machine? I just want people (admins) to connect to the box using ssh? Thanks. (2 Replies)
Discussion started by: johnbrickell
2 Replies

3. Shell Programming and Scripting

Webpage to Telnet via Perl and Expect: Telnet problem?

Somewhat long story: I have a simple Perl CGI script that uses Expect to Telnet to a device and grab some data, and then spits it back to Perl for display on the Webpage. This works for many devices I've tried, but one device just fails, it keeps rejecting the password on this device, only... (1 Reply)
Discussion started by: jondo
1 Replies

4. Shell Programming and Scripting

strange expect script behavior, or am i misunderstanding expect scripting?

Hello to all...this is my first post (so please go easy). :) I feel pretty solid at expect scripting, but I'm running into an issue that I'm not able to wrap my head around. I wrote a script that is a little advanced for logging into a remote Linux machine and changing text in a file using sed.... (2 Replies)
Discussion started by: v1k0d3n
2 Replies

5. Ubuntu

Ubuntu Server 810 Telnet ** I know its Bad.. But **

I have a real need to telnet into my new Ubuntu 8.10 server and have Googled my eyes out with ideas that don't work. I CAN telnet out of the server, but I CANNOT telnet into it (connection refused error). I have updated my resolv.conf file but its expert time. ANY IDEAS??? THANKS!!! I knew I was... (13 Replies)
Discussion started by: gbxfan
13 Replies

6. Shell Programming and Scripting

Not able to pass Username and Password in telnet session

I have created a shell script to telnet remote machine. Here is the problem I am not able to pass the login username and password to the telnet session. I have searched forum and got few other methods to achieve this. But I need to know what's wrong in the below script. username="root"... (2 Replies)
Discussion started by: uxpassion
2 Replies

7. Shell Programming and Scripting

Scripting help/advise on hiding/masking username/password

Hi, I currently have a UNIX script with a function that uses a username and password to connect to the database, retrieve some information and then exit. At the moment, am getting the username and password from a hidden plain text file and permission set to -r--------, i.e. read only to who... (1 Reply)
Discussion started by: newbie_01
1 Replies

8. Shell Programming and Scripting

Expect script - going in loops can't stop

Hi First of all I tried lot of forums to create my first expect script. But I am totally stumped at the last step. I am no Linux Admin or ever trained in Linux. I just tried to create the script logically History : I need to to change my password across lot of servers in Linux over ssh ... (4 Replies)
Discussion started by: radioactive9
4 Replies

9. Shell Programming and Scripting

Username and password

Hi I am new to using unix and am struggling with a script i am writing. What i am trying to do is get a user to enter a username, check the original file i created with username and pin to see if their is a corresponding entry. Next ask the user to enter the pin and see if this matches... (5 Replies)
Discussion started by: somersetdan
5 Replies

10. Shell Programming and Scripting

Passing username and password to a script running inside "expect" script

Hi I'm trying to run a script " abc.sh" which triggers "use.sh" . abc.sh is nothing but a "expect" script which provides username and password automatically to the use.sh script. Please find below the scripts: #abc.sh #!/usr/bin/expect -f exec /root/use.sh expect "*name*" send... (1 Reply)
Discussion started by: baddykam
1 Replies

LEARN ABOUT OSF1

netrc

netrc(4)						     Kernel Interfaces Manual							  netrc(4)

NAME

       netrc, .netrc - Specifies automatic login information for ftp

SYNOPSIS

       $HOME/.netrc

DESCRIPTION

       The  .netrc  file contains the information used by the automatic login (autologin) feature of the ftp command.  It is a hidden file in your
       home directory and must be owned by the user logging in, or by the root user.   If the .netrc file contains a login  password,  the  file's
       permissions must be set to 600 (read and write by owner only).

       The  .netrc file can contain the following entries (separated by spaces, tabs, or newlines): Where host is the name of a remote host.  This
       entry begins the definition of the autologin process for the specified host.  All following entries up to the next machine entry or the end
       of  the	file apply to that host.  This is the same as machine, except that default matches any name.  There can be only one default token,
       and it must appear after all machine tokens.  This is normally used as follows: default login anonymous password  user@site  The  preceding
       command	line gives the user automatic anonymous ftp login to machines not specified in .netrc.	This can be overriden by using the -n flag
       to disable autologin.  Where user is the username to use at the remote host.  If this entry is found, the  autologin  process  initiates  a
       login  using  the specified name.  If this entry is missing, the autologin process fails.  Where password is the login password to be used.
       The autologin process supplies this password to the remote server.  A login password must be established at the remote host and that  pass-
       word  must  be  entered	in  this  file, or the autologin process fails and you are prompted for the login password.  Where password is the
       account password to be used.  If this entry is found and an account password is required at the remote host, the autologin process supplies
       the  password  to  the  remote  server.	 If  the remote host requires an account password but this entry is missing, the autologin process
       prompts for the account password.  Where macro is the name of an ftp subcommand macro.  The macro definition starts on the  following  line
       and  is	defined  to  contain all of the following ftp subcommands up to the next blank line.  If the macro is named init, ftp executes the
       macro upon successful completion of the autologin process.

FILES

       Contains automatic login information.

RELATED INFORMATION

       Commands:  ftp(1).  delim off

																	  netrc(4)
All times are GMT -4. The time now is 12:54 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy