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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

service

SERVICE(8)						    BSD System Manager's Manual 						SERVICE(8)

NAME

     service -- control (start/stop/etc.) or list system services

SYNOPSIS

     service -e
     service -R
     service [-v] -l | -r
     service [-v] <rc.d script> start|stop|etc.

DESCRIPTION

     The service command is an easy interface to the rc.d system.  Its primary purpose is to start and stop services provided by the rc.d scripts.
     When used for this purpose it will set the same restricted environment that is in use at boot time (see below).  It can also be used to list
     the scripts using various criteria.

     The options are as follows:

     -e  List services that are enabled.  The list of scripts to check is compiled using rcorder(8) the same way that it is done in rc(8), then
	 that list of scripts is checked for an "rcvar" assignment.  If present the script is checked to see if it is enabled.

     -R  Restart all enabled local services.

     -l  List all files in /etc/rc.d and the local startup directories.  As described in rc.conf(5) this is usually /usr/local/etc/rc.d.  All
	 files will be listed whether they are an actual rc.d script or not.

     -r  Generate the rcorder(8) as in -e above, but list all of the files, not just what is enabled.

     -v  Be slightly more verbose

ENVIRONMENT

     When used to run rc.d scripts the service command sets HOME to / and PATH to /sbin:/bin:/usr/sbin:/usr/bin which is how they are set in
     /etc/rc at boot time.

EXIT STATUS

     The service utility exits 0 on success, and >0 if an error occurs.

EXAMPLES

     The following are examples of typical usage of the service command:

	   service named status
	   service -rv

     The following programmable completion entry can be use in bash(1) for the names of the rc.d scripts:
	   _service () {
		local cur
		cur=${COMP_WORDS[COMP_CWORD]}
		COMPREPLY=( $( compgen -W '$( service -l )' -- $cur ) )
		return 0
	   }
	   complete -F _service service

SEE ALSO

     bash(1) (ports/shells/bash), rc.conf(5), rc(8), rcorder(8)

HISTORY

     The service utility first appeared in FreeBSD 7.3.

AUTHORS

     This manual page was written by Douglas Barton <dougb@FreeBSD.org>.

BSD
								 December 11, 2012							       BSD
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