#!/bin/bash
########################################################################
#                                                                      #
# generic utiltiy modules                                              #
# (c) 2001 jannet it services                                          #
# contact@jannet.de                                                    #
#                                                                      #
# $Id$
#                                                                      #
# This program is free software; permission to use, copy, modify,      #
# distribute, and sell this software and its documentation under the   #
# terms of the GNU Public license as published by the Free Software    #
# Foundation, either version 2 or any later version of the license, is #
# hereby granted without fee, provided that (i) the above copyright    #
# notices and this permission notice appear in all copies of the       #
# software and related documentation, and (ii) the name of JanNet may  #
# not be used in any advertising or publicity relating to the software #
# without the specific, prior written permission of JanNet.            #
#                                                                      #
# This program is distributed in the hope that it will be useful, but  #
# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHAN-  #
# TABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General    #
# Public License for more details.                                     #
#                                                                      #
# You should have received a copy of the GNU General Public License    #
# along with this program; if not, write to the Free Software Founda-  #
# tion, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.                  #
#                                                                      #
########################################################################

usage()
{
	echo "
	usage: $myname [-h]
	       $myname [-v]
	       $myname [-V]
"
	[ "$1" ] && exit $1
}

cmd_name_version()
{
	if [ -r /etc/os-release ]; then
		. /etc/os-release
		if [ "$opt_verbose" ]; then
			echo $NAME $VERSION
			exit 0
		fi
		if grep -qi tumbleweed /etc/os-release; then
			echo suse-tumbleweed
			exit 0
		fi
		if [ "$ID" != ubuntu ]; then
			[ "$ID_LIKE" ] && ID=$ID_LIKE
		fi
		case "$ID" in
		debian)
			VERSION_NAME=`echo $PRETTY_NAME | awk 'NF>1{print $NF}' | sed 's%/.*%%' | tr '[A-Z]' '[a-z]'`
			case $VERSION_NAME in
			buster)       VERSION_ID=10;;
			stretch)      VERSION_ID=9;;
			jessie)       VERSION_ID=8;;
			wheezy)       VERSION_ID=7;;
			squeeze)      VERSION_ID=6.0;;
			lenny)        VERSION_ID=5.0;;
			etch)         VERSION_ID=4.0;;
			sarge)        VERSION_ID=3.1;;
			woody)        VERSION_ID=3.0;;
			potato)       VERSION_ID=2.2;;
			slink)        VERSION_ID=2.1;;
			hamm)         VERSION_ID=2.0;;
			*)
				;;
			esac
			;;
		ubuntu)
			;;
		suse|opensuse)
			;;
		*)
			VERSION_ID=42
			;;
		esac
		echo $ID-$VERSION_ID | sed 's/opensuse/suse/g'
		exit 0
	fi

	if [ -e /etc/SuSE-release ]; then
		if [ "$opt_verbose" ]; then
			head -1 /etc/SuSE-release
		else
			VERSION="`grep VERSION /etc/SuSE-release | sed -e 's/.*=//; s/ //g'`"
			echo suse-$VERSION
		fi
		exit
	fi

	if [ "$opt_verbose" ]; then
		uname -a
	else
		uname -r
	fi
}

cmd_version()
{
	local nv=`cmd_name_version`
	echo ${nv#*-}
}

cmd_name()
{
	local nv=`cmd_name_version`
	echo ${nv%%-*}
}

# --- here we go

myname=`basename $0`
release_file=/etc/os-release
cmd=name_version

eval set -- `getopt -- hvV "$@"`
while [ "$1" != -- ] ; do
case "$1" in
	-h)
		usage 0
		;;
	-v)
		opt_verbose=1;
		;;
	-V)
		cmd=version
		;;
	*)
		usage 1
		;;
esac
shift
done
shift

[ "$1" ] && cmd="${1/-/_}"

eval cmd_$cmd