#! /bin/sh
#----------------------------------------------------------------------------
# remove-user-from-additional-group - remove user from additional group
#
# Copyright (c) 2003 Frank Meyer <frank@eisfair.org>
#
# Creation:	20.07.2003  fm
# Last Update:  20.07.2003  fm
#
# 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.
#----------------------------------------------------------------------------

clrhome
colecho "Remove user from additional group" gn
echo

tty=`tty`

echo
echo

echo -e "User: \c"
read user

IFS=':'

if [ "$user" != "" ]
then
    echo
    line=`grep "^$user:" /etc/passwd`

    if [ "$line" != "" ]
    then    
	groups=''
	echo "  Additional groups of user $user:"
	echo
	IFS=':'
	while read line
	do
	    set -- $line
	    g="$1"
	    u="$4"

	    IFS=','
	    set -- $u
	    for j in $*
	    do
		if [ $j = $user ]
		then
		    echo "    $g"
		    groups="$groups "$g
		    break
		fi
	    done
	    IFS=':'
	done </etc/group
	unset IFS

	if [ "$groups" != "" ]
	then
	    echo
	    echo -e "Remove user $user from group: \c"
	    read rg
	    echo

	    if [ "$rg" != "" ]
	    then
		group_found=false

		for j in $groups
		do
		    if [ $rg = $j ]
		    then
			group_found=true
			break
		    fi
		done

		if [ $group_found = true ]
		then
		    IFS=':'
		    while read line
		    do
			set -- $line
			g="$1"

			if [ $g = $rg ]
			then
			    p="$2"
			    i="$3"
			    u="$4"

			    IFS=','
			    set -- $u
			    echo -e "$g:$p:$i:\c"

			    first_user=true
			    for j in $*
			    do
				if [ $j != $user ]
				then
				    if [ $first_user = false ]
				    then
					echo -e ",\c"
				    else
					first_user=false
				    fi
				    echo -e "$j\c"
				fi
			    done
			    echo
			    IFS=':'
			else
			    echo "$line"
			fi
		    done </etc/group >/etc/group-$$
		    cp /etc/group /etc/group.old    # save old group file
		    cp /etc/group-$$ /etc/group	    # keep permissions
		    rm -f /etc/group-$$
		    unset IFS
		else
		    colecho "additional group $rg for user $user not found!" br x br
		fi
	    else
		colecho "Command aborted" br x br
	    fi
	else
	    colecho "No additional group for $user found!" br x br
	fi
	echo
    else
	echo
	colecho "User $user does not exist!" br x br
    fi
else
    echo
    colecho "Command aborted" br x br
fi
echo
/var/install/bin/anykey