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Top Forums Shell Programming and Scripting Script to get checksum of itself Post 302991317 by rbatte1 on Thursday 9th of February 2017 04:13:46 AM
Old 02-09-2017
If you update the file to insert the correct checksum, then that will change the checksum for the next run. You would be extremely unlikely to ever be able to guess the checksum and be able to put it in the script.

You could consider:-
  • Change the permissions
  • Have the script read a file holding the checksum
  • Use and IDS as zaxxon suggests
  • Regularly checksum your code and compare to the previous run
Of course, all of these can be bypassed by someone with appropriate authority, so it comes down to a question of who is trusted and only granting access to those you can trust. A script that can be read can be copied and adjusted before running the local copy anyway, if the user has the authority to do so, so you should be thinking of denying all access except where you are comfortable granting it.

Making the scripts' permissions as rwx --- --- and having a sudo rule to allow specific people to execute it may be the way to go.


I hope that this gives you some ideas to ponder further.
Robin

Last edited by rbatte1; 02-09-2017 at 05:14 AM.. Reason: Closing message & signature
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SCRIPT-EMAIL(8) 					  System Administration Commands					   SCRIPT-EMAIL(8)

NAME
script-email - Amanda script to send email notifications DESCRIPTION
script-email is an Amanda script implementing the Script API. It should not be run by users directly. It sends a notification email to the addresses specified in the MAILTO property. PROPERTIES
This section lists the properties that control script-email's functionality. See amanda-scripts(7) for information on the Script API, script configuration. MAILTO List of email addresses that will receive an email on command execution. It is a multi-valued property: property "MAILTO" "amanda@domain.com" "sysadmin@domain.com" "amandauser@domain.com" EXAMPLE
In this example, script-email is scheduled to be run before the DLE, on the server. The unqualified email address amanda will be passed to the email system unchanged. The script is then attached to a dumptype, which can then be specified for any DLEs which require notification. define script-tool pre-email { comment "email me before this DLE is backed up" plugin "script-email" execute-on pre-dle-backup execute-where server property "mailto" "amanda" } define dumptype user-tar-email { user-tar script "pre-email" } SEE ALSO
amanda(8), amanda.conf(5), amanda-client.conf(5), amanda-scripts(7) The Amanda Wiki: : http://wiki.zmanda.com/ AUTHORS
Jean-Louis Martineau <martineau@zmanda.com> Zmanda, Inc. (http://www.zmanda.com) Dustin J. Mitchell <dustin@zmanda.com> Zmanda, Inc. (http://www.zmanda.com) Amanda 3.3.3 01/10/2013 SCRIPT-EMAIL(8)
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