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

if [ "$#" -ne 15 -a "$#" -ne 13 ]
then
	echo "Usage: `basename $0` -O UID_MIN=<uid_min> -O UID_MAX=<uid_max> -c <Pkg Desc> -d <home_dir> -g <primary_group> [ -G <secondary_group> ] -s /bin/bash <user>"
	echo "Note: No sanity checks are performed."
	exit 1
fi

T_UID_MIN=`expr "x$2" : 'x[^=]*=\(.*\)'`
shift 2
T_UID_MAX=`expr "x$2" : 'x[^=]*=\(.*\)'`
shift 2
T_DESC="$2"
shift 2
T_HOME=$2
shift 2
PGROUP=$2
shift 2
T_SGROUP=
if [ "$1" = "-G" ]
then
	T_SGROUP=$2
	shift 2
fi
T_USER=$3
T_UIDS=`cut -d : -f 3 /etc/passwd | sort -n`
T_UID=0
for U in $T_UIDS
do
	if [ $U -ge $T_UID_MAX ]
	then
		break
	fi
	if [ $U -ge $T_UID_MIN ]
	then
		T_UID=$U
	fi
done
if [ $T_UID -eq 0 ]
then
	T_UID=$T_UID_MIN
else
	T_UID=`expr $T_UID + 1`
fi
PGROUP_GID=`grep ^$PGROUP:.\* /etc/group | cut -d : -f 3 -`
echo "$T_USER:x:$T_UID:$PGROUP_GID:$T_DESC:$T_HOME:/bin/bash" >> /etc/passwd
if [ "x$T_SGROUP" != "x" ]
then
	sed -i -e 's/^\('"$T_SGROUP"':[^:]*:[0-9]*:..*\)$/\1,'"$T_USER"'/' -e 's/^\('"$T_SGROUP"':[^:]*:[0-9]*\):$/\1:'"$T_USER"'/' /etc/group
fi