#! /bin/sh
#----------------------------------------------------------------------------
# /var/install/bin/add-user-to-additional-group - add user to additional group
#
# Copyright (c) 2001-2005 The Eisfair Team, c/o Frank Meyer, frank(at)eisfair(dot)org
#
# Creation: 20.07.2003  fm
# Last Update:  $Id$
#
# 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.
#----------------------------------------------------------------------------

# include eislib
. /var/install/include/eislib

clrhome
mecho -info "Add user to additional group"
echo

tty=`tty`

echo
echo
/var/install/bin/ask "User:" '' '*' > /tmp/ask.$$
rc=$?
user=`cat /tmp/ask.$$`
rm -f /tmp/ask.$$
if [ $rc = 255 ]
then
    exit 1
fi

oldifs="$IFS"

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

    if [ "$line" != "" ]
    then    
        # get GID of primary group
        primgid=`grep "^$user:" /etc/passwd | cut -f4 -d:`
        groups=''
        free_groups=''
        IFS=':'
        while read line
        do
            set -- $line
            g="$1"
            gid="$3"
            u="$4"

            IFS=','
            set -- $u
            group_found=false
            for j in $*
            do
                if [ $j = $user ]
                then
                    group_found=true
                    break
                fi
            done

            if [ $group_found = true ]
            then
                if [ "$groups" = "" ]
                then
                    groups="$g"
                else
                    groups="$groups "$g
                fi
            else
                # check for primgid
                if [ $gid != $primgid ]
                then
                    if [ "$free_groups" = "" ]
                    then
                        free_groups="$g"
                    else
                        free_groups="$free_groups $g"
                    fi
                fi
            fi

            IFS=':'
        done </etc/group
        IFS="$oldifs"

        if [ "$groups" != "" ]
        then
            echo "  Additional groups of user $user:"
            echo
            echo "    $groups"
            echo
        fi

        if [ "$free_groups" != "" ]
        then
            echo "  Free additional groups:"
            echo
            echo "    $free_groups"
            echo
        fi

        if [ "$free_groups" != "" ]
        then
            mecho
            /var/install/bin/ask "Add user $user to group:" '' '*' > /tmp/ask.$$
            rc=$?
            ag=`cat /tmp/ask.$$`
            rm -f /tmp/ask.$$
            if [ $rc = 255 ]
            then
                exit 1
            fi
            echo

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

                for j in $free_groups
                do
                    if [ $ag = $j ]
                    then
                        group_found=true
                        break
                    fi
                done

                if [ $group_found = true ]
                then
                    g=`echo "$groups $ag" | sed 's/ /,/g'`
                    /usr/sbin/usermod -G $g $user
                else
                    mecho -warn "additional group $ag for user $user not found!"
                fi
            else
                mecho -warn "Command aborted"
            fi
        else
            mecho -warn "No additional group for $user found!"
        fi
    else
        mecho -warn "User $user does not exist!"
    fi
else
    echo
    mecho -warn "Command aborted"
fi

echo
anykey