[K12OSN] Student Process Reaper Script

[Dennis Daniels]

Hmm, very nice! I wonder if there might be a GUI for grouping user 
access perms to applications... for a couple of my students I don't want 
them playing any games at all! :)

great idea Henry!
Dennis

Henry Burroughs wrote:
> I wrote a script this morning to keep the students in my classes from 
> playing games/chess/web browsing during my classes (I don't want to 
> uninstall games, and that doesn't stop the browsing).  Basically, the 
> script is an infinite loop (always wanted to have a "while (true)" loop) 
> that reads 2 variables from a file that you specify on the command line 
> (ctrl-c stops it).  It just loops and does a ps list for each user and 
> picks the pids of the programs you don't want them to run, and kills 
> them... here's the contents from my 1st period file I use:
> 
> #1st_period.reap
> #1st Period - no mozilla, no chess, no Maelstrom
> REAP_USERS="cfraser afuller mandrews rladd cpawley"
> 
> REAP_PROGS="mozilla-bin gnuchess Maelstrom"
> 
> 
> So I run ./class_reaper.sh 1st_period.reap
> 
> 
> You have to run it as root at the moment...  DO NOT RUN THIS USING 
> SUDO!!!!!!!!!!!
> As you can imagine, a malicious user who has access to run it could 
> terminate any users programs, as well as gdm, root, etc!!!!  If someone 
> wants to make it SUDO safe (ie: protect root, etc... or users under a 
> UID # range), and not kill users within specific groups (ie: 
> Faculty).... you are quite welcome to.
> 
> I've thought about making it interactive... ie: as students finish an 
> assignment, I can release them while not having to terminate the script 
> and reload the new text file.
> 
> 
> 	Henry Burroughs
> Technology Director
> Hilton Head Preparatory School
> www.hhprep.org
> hburroughs at hhprep.org
> 
> 
> ------------------------------------------------------------------------
> 
> # Class/period process reaper
> # Copyright Henry Burroughs
> 
> #	This program is free software; you can redistribute it and/or modify
> #    it under the terms of the GNU General Public License as published by
> #    the Free Software Foundation; either version 2 of the License, or
> #    (at your option) any later version.
> 
> #    This program is distributed in the hope that it will be useful,
> #    but WITHOUT ANY WARRANTY; without even the implied warranty of
> #    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> #    GNU General Public License for more details.
> 
> #    You should have received a copy of the GNU General Public License
> #    along with this program; if not, write to the Free Software
> #    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
> 
> 
> #!/bin/bash
> 
> if [ $# -ne 1 ]; then
> 	echo "Please provide file with REAP_USERS & REAP_PROGS variables";
> 	exit;
> fi
> 
> . $1 #Load info
> 
> #BUILD GREPLIST
> for prog in $REAP_PROGS; do
> 	GREP_LIST="$GREP_LIST -e $prog";
> done
> 
> while (true); do
> 	for user in $REAP_USERS; do
> 		PROG_LIST=`ps h -u $user 2> /dev/null | grep $GREP_LIST`;
> 		#echo $PROG_LIST|cut -d" " -f 1;
> 		kill `echo $PROG_LIST|cut -d" " -f 1` 2> /dev/null;
> 	done
> done
> 
> 
> ------------------------------------------------------------------------
> 
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