#!/bin/bash
# Okay, We were setting up users on this machine, and the instructor
# wanted to be able to put stuff in their directories.
# At first, I just thought I'd put the teacher into every student's
# User Private Group.  Great idea, until I ran into the 32 group
# limit on Linux.  Yarg!  So I had to create a new group, with
# one member, a group called teachers.  Then, I make sure all
# the student home directories are group owned by teachers.
#
# You see references to CCIS in these scripts, because I was
# teaching in the Computer Careers department.  I think our
# full acroynm was Computer Careers and Information Services
#
# This works great until Per Kjeldaas, our Java teacher,
# would upload directories into the student $HOME dirs
# ownership was hinky--in fact, they're owned by per, preventing
# any users from saving stuff in that directory.
# this script goes through all user directories, searching for an dir
# which has a name starting in ccis.  For those it finds, it parses
# out the username, and uses it to force ownership and permissions.
# questions/comments/improvements to jeremy (at) angelar.com
# GPL'd, baby.  V2

for homedir in $(ls -d /home/u[0-9][0-9]*); do
	/bin/chown $i.teachers $homedir
	/bin/chmod ug=rwx $homedir
done

# first loop forces the homedirectory to be properly chowned and chmod'd
# don't 770 /home/$i -R because there are other directories
# like public_html that we don't want to mess with

# next loop forces permissions and ownership on any directories 
# named ccis under their homedirs.

for i in $(/usr/bin/find /home -name 'ccis*' -type d | /bin/awk -F/ '{print $3}'); do 
	/bin/chown -R $i.teachers /home/$i/ccis*
done

find /home -name 'ccis*' -type d -noleaf -exec chmod 2770 "{}" \;
# setgid on ccis directories so teachers can always read student's work.

find /usr/local/apache2/htdocs -name 'ccis*' -type d -exec chmod -R o+rx,g-s "{}" \;