#!/bin/bash
# groupadd script till shadow is installed.
# It *only* accepts the syntax mentioned.
# No sanity checks are performed.

if [ "$#" -ne 5 ]
then
	echo "Usage: `basename $0` -O GID_MIN=<gid_min> -O GID_MAX=<gid_max> group"
	echo "Note: No sanity checks are performed."
	exit 1
fi

T_GID_MIN=`expr "x$2" : 'x[^=]*=\(.*\)'`
T_GID_MAX=`expr "x$4" : 'x[^=]*=\(.*\)'`
T_GROUP=$5
T_GIDS=`cut -d : -f 3 /etc/group | sort -n`
T_GID=0
for G in $T_GIDS
do
	if [ $G -ge $T_GID_MAX ]
	then
		break
	fi
	if [ $G -ge $T_GID_MIN ]
	then
		T_GID=$G
	fi
done
if [ $T_GID -eq 0 ]
then
	T_GID=$T_GID_MIN
else
	T_GID=`expr $T_GID + 1`
fi
echo $T_GROUP:x:$T_GID: >> /etc/group