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Top Forums Shell Programming and Scripting Prevent wrong user from using shell script for multiple remote servers Post 302528895 by mystition on Wednesday 8th of June 2011 07:17:25 AM
Old 06-08-2011
Question Prevent wrong user from using shell script for multiple remote servers

Hi,

I am running a shell script from a central server to multiple remote servers using the following code:

Code:
application_check()
{
# Linux/UNIX box with ssh key based login
SERVERS=`cat /tmp/server-details`
# SSH User name
USR="user"
# create new file
> /tmp/abc.log
 
# connect each host and pull up user listing
for host in SERVERS
do
echo "--------------------------------" >> /tmp/abc.log
echo "HOST: $host " >> /tmp/abc.log
echo "--------------------------------" >> /tmp/abc.log
 
ssh -q $USR@$host '
       command 1
      command 2
      echo "EOF"
         ' >> /tmp/abc.log
}

Now, when someone runs this script using another user for which the ssh keys are not shared in the remote servers, the script gets stuck initially asking for authentication or password.

Code:
 The authenticity of host '10.1.1.1 (10.1.1.1)' can't be established.
RSA key fingerprint is 32:f8:ac:a4:af:ab:dc:3a:02:29:e8:0e:36:2d:06:e4.
Are you sure you want to continue connecting (yes/no)?

or
Code:
 $hosts's password:

I want to have a check within my script that if it encounters the above two outputs on screen, then it should exit the script by giving an error.

I cannot use expect.

Please suggest a resolution.

Thanks in advance//
 

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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) BSD
September 27, 2014 BSD
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