#! /bin/sh
#----------------------------------------------------------------------------
# /var/install/bin/add-user-to-additional-group - add user to additional group
#
# Creation:     2003-07-20  fm
# Last Update:  $Id$
#
# Copyright (c) 2001-2007 the eisfair team, team(at)eisfair(dot)org
#
# 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

#exec 2> /tmp/add-user$$.log
#set -x

#----------------------------------------------------------------------------
# add user to group
#----------------------------------------------------------------------------
add_user_to_group ()
{

if [ "${quietflag}" = "-quiet" ]
then
    user=${1}
    ag=${2}
fi

if [ "${quietflag}" = "" ]
then
    clrhome
    myecho -info "Add user to additional group"
    mecho

    tty=`tty`
    mecho
    mecho

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

oldifs="${IFS}"

if [ "${user}" != "" ]
then
    myecho
    line=`grep "^${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
            myecho -std "  Additional groups of user ${user}:"
            myecho
            myecho -std "    ${groups}"
            myecho
        fi

        if [ "${free_groups}" != "" ]
        then
            myecho -std "  Free additional groups:"
            myecho
            myecho -std "    ${free_groups}"
            myecho
        fi

        if [ "${free_groups}" != "" ]
        then
            if [ "${quietflag}" = "" ]
            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
            fi
            myecho

            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
                    myecho -warn "additional group ${ag} for user ${user} not found!"
                fi
            else
                myecho -warn "Command aborted"
            fi
        else
            myecho -warn "No additional group for ${user} found!"
        fi
    else
        myecho -warn "User ${user} does not exist!"
    fi
else
    myecho
    myecho -warn "Command aborted"
fi

if [ "${quietflag}" = "" ]
then
mecho
anykey
fi

}

myecho ()
{
    case ${quietflag} in
        -quiet)
           # nothing to do
        ;;

        *)
           mecho ${1} "${2}"
        ;;
    esac
}
#----------------------------------------------------------------------------
# main
#----------------------------------------------------------------------------

user=''
group=''
quietflag='-quiet'

usage ()
{
cat  <<EOF

 Usage:
 ${0}

        -u, --user            user to remove
        -g, --group           group to user remove from

                              or empty for interactive mode

 Example: ${0} --user mustermann --group users
 Example: ${0} -u mustermann -g users
 Example: ${0}

EOF
}

if [ ${#} -eq 0 ]
then
    quietflag=''
    add_user_to_group
    exit 0
fi

if [ ${#} -lt 4 ]
then
    usage
    exit 1
fi

while [ ${#} -ne 0 ]
do
    case ${1} in
        -u|--user)
            user="${2}"
            shift; shift
        ;;

        -g|--group)
            group="${2}"
            shift; shift
        ;;

        *)
            usage
            exit 1
        ;;
    esac
done

add_user_to_group ${user} ${group}

exit 0
#----------------------------------------------------------------------------
# end
#----------------------------------------------------------------------------