04-12-2009
Quote:
Originally Posted by
tuxhats
What I am trying to avoid is two(2) different users sharing work via the same process!!! If two different users are using the same terminal, shut them down! I must shut this "cheating" process down!!!!
Ok, accepted. But (i hope you don't mind) instead of writing a shell script for you i would like to challenge your premise:
Your intention is to prevent users from exchanging work. Alas, as long as you do not take addional measures your concept is not going to work because users could simply share files via publicly accessible directories: copy a file with your work to /tmp, chmod it to 777 and every user could copy it.
Even if this would be prevented somehow you could always exchange work through network-like connections (for instance the "talk" utility, "mail", etc.).
IMHO you need a chrooted environment (see "man chroot") for every student to effectively prevent exchange of work and in this case you could lift the 2-sessions limit because it is an artificial restraint then superfluous.
I hope this helps.
bakunin
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LEARN ABOUT DEBIAN
installsieve
INSTALLSIEVE(1) General Commands Manual INSTALLSIEVE(1)
*
NAME
installsieve - user utility for managing sieve scripts
SYNOPSIS
installsieve
DESCRIPTION
installsieve is a utility that allows users to manage their sieve scripts kept on the server.
OPTIONS
-v <name> View script with the given name. The script if retrieved sucessfully is output to standard output.
-l List all of the scripts currently on the server. If one of the scripts is active a arrow is printed indicating that it is the active
script.
-p <port> Port to connect to. If left off this defaults to "sieve" as defined in /etc/services.
-i <file> Install a file onto the server. If a script with the same name already exists on the server it is overwritten. Upon sucessfully
putting the script on the server the script is set active. If <file> has the extension .script it is chopped when put on the server since
sieve names may not contain a '.'.
-a <name> Set <name> as the active script. The list of available names can be obtained from the '-l' option..
-d <name> Delete the sieve script on the server with <name>.
-m <mechanism> Force installsieve to use <mechanism> for authentication. If not specified the strongest authentication mechanism is chosen.
-g <name> Get the sieve script with <name> and save it to disk with a ".script" extension. If a file with that name already exists it is
overwritten.
-u <user> Userid/Authname to use for authentication; by default, the current user.
CMU
Project Cyrus INSTALLSIEVE(1)