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Full Discussion: How to use 'expect' to pass UID & Password to a "for loop" in shell script?
Top Forums Shell Programming and Scripting How to use 'expect' to pass UID & Password to a "for loop" in shell script? Post 302875357 by thisissouvik on Tuesday 19th of November 2013 10:00:31 AM
Old 11-19-2013
XL,

I would have to do some more trial & error method to make your suggested technique of this script to work -- I'll update this discussion as soon as I could get it work. FYI, the highlighted portion(in red) below doesn't work:

Code:
My_NIM_Server:msouvik:/export/home/msouvik>./expect_script_3.sh
msouvik@My_NIM_Client_1's password:
Last unsuccessful login: Thu Nov 14 12:13:52 GMT 2013 on ssh from My_NIM_Server
Last login: Mon Nov 18 12:18:57 GMT 2013 on /dev/pts/2 from x.x.x.x
*******************************************************************************
*                                                                             *
*                                                                             *
*  Welcome to AIX Version 7.1!                                                *
*                                                                             *
*                                                                             *
*  Please see the README file in /usr/lpp/bos for information pertinent to    *
*  this release of the AIX Operating System.                                  *
*                                                                             *
*                                                                             *
*******************************************************************************
My_NIM_Client_1:msouvik:/export/home/msouvik>PS1='PROMPT# '
PROMPT #oslevel -s
7100-02-02-1316
PROMPT #exit
Connection to My_NIM_Client_1 closed.

The script is not able to set the PS1 shell parameter, it does it without being able to set it as below(already shared before):

Code:
My_NIM_Server:msouvik:/export/home/msouvik>./expect_script_3.sh
msouvik@My_NIM_Client_1's password:
Last unsuccessful login: Thu Nov 14 12:13:52 GMT 2013 on ssh from My_NIM_Server
Last login: Mon Nov 18 12:18:57 GMT 2013 on /dev/pts/2 from x.x.x.x
*******************************************************************************
*                                                                             *
*                                                                             *
*  Welcome to AIX Version 7.1!                                                *
*                                                                             *
*                                                                             *
*  Please see the README file in /usr/lpp/bos for information pertinent to    *
*  this release of the AIX Operating System.                                  *
*                                                                             *
*                                                                             *
*******************************************************************************
My_NIM_Client_1:msouvik:/export/home/msouvik>oslevel -s 
7100-02-02-1316
My_NIM_Client_1:msouvik:/export/home/msouvik>exit
Connection to My_NIM_Client_1 closed.
msouvik@My_NIM_Client_2's password:
Last unsuccessful login: Thu Nov 14 12:13:52 GMT 2013 on ssh from My_NIM_Server
Last login: Mon Nov 18 12:18:57 GMT 2013 on /dev/pts/2 from x.x.x.x
*******************************************************************************
*                                                                             *
*                                                                             *
*  Welcome to AIX Version 7.1!                                                *
*                                                                             *
*                                                                             *
*  Please see the README file in /usr/lpp/bos for information pertinent to    *
*  this release of the AIX Operating System.                                  *
*                                                                             *
*                                                                             *
*******************************************************************************
My_NIM_Client_2:msouvik:/export/home/msouvik>oslevel -s 
7100-02-02-1316
My_NIM_Client_2:msouvik:/export/home/msouvik>exit
Connection to My_NIM_Client_2 closed.

in2nix4life,

Your recent suggestion gave me error too, modified code pasted below:

Code:
    +1  #!/usr/bin/expect -f
    +2  #
    +3  #
    +4
    +5  # slurp in file containing hostnames
    +6  set hostfile [open "server_list" r]
    +7  set hostdata [read $hostfile]
    +8  close $hostfile
    +9
   +10  # loop through hosts, connect, and run command
   +11  foreach h [split $hostdata "\n"] {
   +12      log_file myLog.log         # log output to a local log file
   +13      if {$h eq {}} continue  # skip any blank lines encountered in the server file
   +14      set u "msouvik"
   +15      set p "pass^123"
   +16      set cmd "oslevel -s"
   +17      spawn ssh -t $u@$h $cmd
   +18      expect "?assword:*"
   +19      send -- "$p\r"
   +20      send -- "exit\r"
   +21      send -- "\r"
   +22      expect eof
   +23  }

Error:

Code:
My_NIM_Server:msouvik:/export/home/msouvik>./expect_script.sh
wrong # args: extra words after "else" clause in "if" command
    while compiling
"if {$h eq {}} continue  # skip any blank lines encountered in the server file"
    ("foreach" body line 3)
    invoked from within
"foreach h [split $hostdata "\n"] {
    log_file myLog.log         # log output to a local log file
    if {$h eq {}} continue  # skip any blank lines ..."
    (file "./expect_script_4.sh" line 11)

Good news is, I could get my job done with pieces of code taken from each of your suggestions.
So, my expect code to run the desired cmd on target servers looks like this:

Code:
#!/usr/bin/expect -f
#
#

# set credentials
set u "msouvik"
set p "pass^123"

# get host name from command-line
set h [lindex $argv 0]

# set the command to run
set cmd "oslevel -s >> /export/home/msouvik/expect.out; multibos -S >> /export/home/msouvik/expect.out"

# spawn a connection to the host and run the given command
spawn -noecho ssh -t $u@$h $cmd

# handle the password prompt
expect "?assword:*"
send -- "$p\r"
send -- "\r"

And the code to scp the above run cmd o/p's is as below:

Code:
#!/usr/bin/expect -f
#

# set credentials
set u "msouvik"
set p "pass^123"

# get host name from command-line
set h [lindex $argv 0]

# scp the data onto NIM server
spawn -noecho scp $u@$h:/export/home/msouvik/expect.out /export/home/msouvik/expect/expect.out.$h

# handle the password prompt for scp
expect "?assword:*"
send -- "$p\r"
send -- "\r"

# done
expect eof

The scp is successfully able to get me the cmd o/p's to my NIM server suffixing with the relevant hostname as in "expect.out.$h"

You may ask, why did I choose to have 2 separate scripts for this purpose - thats coz when I club these to scripts into one - it fails to do the job(reason not known to me at the moment!)

The discussion doesn't end here until I'm able to fix both of your recent suggestions.


-- Souvik
 

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