Expect Telnet Example

Written by: dimport Published by: dimport Published on: 2003-06-21 07:19:46 Topic: Linux

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Expect is a great scripting language developed by Don Libes, makes boring interaction so much easier. This is a nice telnet example, well commented.

#!/usr/bin/expect #Where the script should be run from. set timeout 20 #If it all goes pear shaped the script will timeout after 20 seconds. set name [lindex $argv 0] #First argument is assigned to the variable name set user [lindex $argv 1] #Second argument is assigned to the variable user set password [lindex $argv 2] #Third argument is assigned to the variable password spawn telnet $name #This spawns the telnet program and connects it to the variable name expect "login:" #The script expects login send "$user " #The script sends the user variable expect "Password:" #The script expects Password send "$password " #The script sends the password variable interact #This hands control of the keyboard over two you (Nice expect feature!) This article was originally written by Sliptop

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Comments: Anonymous 2006-04-24 07:09:19 But while sending so I am unable to send passwords that contain @.Please guide how to send such passwors through Expect. Anonymous 2007-01-15 20:41:23 Try using the escape character / before the @ symbol. Alternatively, put the password in quotes. Anonymous 2007-02-20 10:07:52 You need to add \r at the end of username and password - Leela Anonymous 2008-05-16 06:14:43 Here's a working example, which logs into the Houston server, which is running Windows 2003 Server, from a laptop running MacOS 10.5: #!/usr/bin/expect spawn telnet -l Administrator houston.fubar.com 2368 expect "password: " send "a1am0\r\n" interact Just save into a file, chmod 700, and you're good to go. Anonymous 2008-06-24 15:08:56 Is this an example, it made it more fuzzier to me Anonymous 2008-08-15 21:29:54 I need to logon a legacy system ,needs a break after Escape char; so I send brk it prompts with an ? . If I put this it does not work: expect "Escape" send "^]\r" send "send brk\r" expect "?" send "login" and it gets stuck , any advise ? Anonymous 2008-09-29 18:39:06 you need to "expect" after every "send". So, combine the two sends, or expect a ">" after you escape back to the telnet prompt. Anonymous 2010-02-24 06:31:14 http://www.certpartners.org ObatAsamUrat 2011-06-16 07:21:08 Should you be even now undecided: pick up your selected earbuds, go into a new Greatest coupe and enquire of for you to select these people in a Microsoft zune and then a music player and discover what one looks preferable to anyone, along with which in turn program making you look far more. You'll recognize that's meets your needs. obat asam urat Anonymously add a comment: (or register here) (registration is really fast and we send you no spam) BB Code is enabled. Captcha Number: