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Full Discussion: Password check in bash script calling on expect
Top Forums Shell Programming and Scripting Password check in bash script calling on expect Post 302941819 by 2legit2quit on Tuesday 21st of April 2015 11:52:45 AM
Old 04-21-2015
Password check in bash script calling on expect
password check in bash script calling on expect

Background: I have to copy a file from one server, to over 100 servers in a test environment. once the file is copied, it requires to have the permissions on the file changed/verified. These are all linux servers. most of them have the same password for login, but some may not. I can't install Ansible as someone else recommended to me on serverfault.

I need help with making a loop in my bash/expect script. It is actually calling on Expect. The area I want to make 'better' or fix, is a few things

- the part where it expects a password. (the * section), it should quit the script after 1 or 2 failed password attempt, and echo like a "bad password logon manually". I'm not worired about the echo part, I can generate a log and sift through that.
- I tried to write the password piece thinking its a loop, but I'm not really sure if that method of thinking is deal. I tried just adding another "expect Password: " thinking that if it gets the prompt a second time, to exit out, but I had a hard time with getting that to work. Thank you!

Code:
#!/bin/bash
while read ip; do

sleep 2
expect <<- DONE
        set timeout 1
        spawn scp yoman.txt root@$ip:/felixtemp
                if above command fails, dump the IP to fail.txt, otherwise continue
        expect yes/no { send yes\r }
        expect Password: { send aaaaaaa\r } #if this is good, continue the script from *****
                else                                     #exit the script
                expect Password: { send 033\r }
                expect # { send "echo 'password failed'\r" }
                && dump to a text file called fail.txt
*****   expect # { send "exit\r\r" }
        sleep 1

        set timeout 1
        spawn ssh root@$ip
        sleep 2
        expect yes/no { send yes\r }
        sleep 2
        expect Password: { send aaaaaa\r }
        sleep 5
        expect # { send "cd /felixtemp\r" }
        expect # { send "chown informix:informix yoman.txt\r" }
        expect # { send "chmod 775 yoman.txt\r" }
        expect # { send "sum yoman.txt | grep 10350 && echo 'transfer good' || echo 'transfer bad'\r" }
        expect # { send exit\r }
        sleep 1
DONE

done < ip.txt

 

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LEARN ABOUT FREEBSD

atf-sh

ATF-SH(1)						    BSD General Commands Manual 						 ATF-SH(1)

NAME

     atf-sh [-s shell] -- interpreter for shell-based test programs

SYNOPSIS

     atf-sh script

DESCRIPTION

     atf-sh is an interpreter that runs the test program given in script after loading the atf-sh(3) library.

     atf-sh is not a real interpreter though: it is just a wrapper around the system-wide shell defined by ATF_SHELL.  atf-sh executes the inter-
     preter, loads the atf-sh(3) library and then runs the script.  You must consider atf-sh to be a POSIX shell by default and thus should not
     use any non-standard extensions.

     The following options are available:

     -s shell	  Specifies the shell to use instead of the value provided by ATF_SHELL.

ENVIRONMENT

     ATF_LIBEXECDIR    Overrides the builtin directory where atf-sh is located.  Should not be overridden other than for testing purposes.
     ATF_PKGDATADIR    Overrides the builtin directory where libatf-sh.subr is located.  Should not be overridden other than for testing purposes.
     ATF_SHELL	       Path to the system shell to be used in the generated scripts.  Scripts must not rely on this variable being set to select a
		       specific interpreter.

EXAMPLES

     Scripts using atf-sh(3) should start with:

	   #! /usr/bin/env atf-sh

     Alternatively, if you want to explicitly choose a shell interpreter, you cannot rely on env(1) to find atf-sh.  Instead, you have to hardcode
     the path to atf-sh in the script and then use the -s option afterwards as a single parameter:

	   #! /path/to/bin/atf-sh -s/bin/bash

ENVIRONMENT

     ATF_SHELL	  Path to the system shell to be used in the generated scripts.

SEE ALSO

     atf-sh(3)

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								September 27, 2014							       BSD
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