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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 SUSE

bashbug

BASHBUG(1)						      General Commands Manual							BASHBUG(1)

NAME

       bashbug - report a bug in bash

SYNOPSIS

       bashbug [--version] [--help] [email-address]

DESCRIPTION

       bashbug	is  a shell script to help the user compose and mail bug reports concerning bash in a standard format.	bashbug invokes the editor
       specified by the environment variable EDITOR on a temporary copy of the bug report format outline. The user must fill  in  the  appropriate
       fields  and  exit  the  editor.	 bashbug  then	mails the completed report to bug-bash@gnu.org, or email-address.  If the report cannot be
       mailed, it is saved in the file dead.bashbug in the invoking user's home directory.

       The bug report format outline consists of several sections.  The first section provides information about the  machine,	operating  system,
       the  bash  version, and the compilation environment.  The second section should be filled in with a description of the bug.  The third sec-
       tion should be a description of how to reproduce the bug.  The optional fourth section is for a proposed fix.  Fixes are encouraged.

ENVIRONMENT

       bashbug will utilize the following environment variables if they exist:

       EDITOR Specifies the preferred editor. If EDITOR is not set, bashbug defaults to emacs.

       HOME   Directory in which the failed bug report is saved if the mail fails.

       TMPDIR Directory in which to create temporary files and directories.

SEE ALSO

       bash(1)

AUTHORS

       Brian Fox, Free Software Foundation
       bfox@gnu.org

       Chet Ramey, Case Western Reserve University
       chet@po.cwru.edu

GNU Bash-4.0							   1998 July 30 							BASHBUG(1)
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