#!/bin/sh
#
# Short:    list Mac OS X (NetInfo) groups to standard out
# Version:  2.03, 13-08-01
# Author:   Mark J Swift, msw AT blackpool.ac.uk
# Long:     For every (non system) user defined by NetInfo, this script
#           lists the following information:
#           user_realname<TAB>group_realname
#           If the output is redirected to a file, the script will create
#           a text file that can be imported into "MacintoshManager.app".
#
# 1.  Log in as root
#
# 2.  Copy this script into roots home directory
#     (/private/var/root/Documents).
#
# 3.  Start a new shell process and change directory to roots home.
#
#       cd ~/Documents
#
# 4.  Set the execute flag is set on the script, type:
#
#       chmod u+x lsgroups.sh
#
# 5.  Execute the "lsgroupss.sh" script and and indirect output
#     to the text file "mmgroups.txt" with the following command:
#
#       ~/Documents/lsgroups.sh > mmgroups.txt
#
for group_name in `nireport / /groups name`
do
  group_id=`niutil -read / /groups/$group_name | grep -y "^gid: " | cut -d: -f2 | tr -d "\040"`
  if [ $group_id -gt 1024 ]
  then
    group_realname=`niutil -read / /groups/$group_name | grep -y "^realname: " | cut -d: -f2 | tr -d "\040"`
    if test -z "group_realname"
    then
      group_realname=$group_name
    fi
    for user_name in `niutil -read / /groups/$group_name | grep -y "^users: " | cut -d: -f2`
    do
      # does the user really exist?
      count=`nireport / /users name | grep -c -y "^$user_name"`
      if [ $count -ne 0 ]
      then
        user_id=`niutil -read / /users/$user_name | grep -y "^uid: " | cut -d: -f2 | tr -d "\040"`
        if [ $user_id -gt 1024 ]
        then
          user_realname=`niutil -read / /users/$user_name | grep -y "^realname: " | cut -d: -f2 |  cut -d ' ' -f2-`
          echo $user_realname,$group_realname | tr "," "\011"
        fi
      fi
    done
  fi
done