#!/bin/sh
#
# Copyright (c) 1989 Jan-Simon Pendry
# Copyright (c) 1989 Imperial College of Science, Technology & Medicine
# Copyright (c) 1989 The Regents of the University of California.
# All rights reserved.
#
# This code is derived from software contributed to Berkeley by
# Jan-Simon Pendry at Imperial College, London.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
# 3. All advertising materials mentioning features or use of this software
#    must display the following acknowledgement:
#      This product includes software developed by the University of
#      California, Berkeley and its contributors.
# 4. Neither the name of the University nor the names of its contributors
#    may be used to endorse or promote products derived from this software
#    without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
#	%W% (Berkeley) %G%
#
# $Id: os-version,v 5.2.2.2 1992/05/31 16:45:46 ezk Exp $
#
#
# Try to find your os version
#
echo "#	... No OSVER= option specified; dynamically determining OSVER for \"${OS}\"" >&2

#SHELL=/bin/sh

# Assume not found by default.  Also some of the uname programs may fail.
OSVER='unknown'

case "${OS}" in
aix3 )
	OSVER=`/bin/uname -v 2>/dev/null`-`/bin/uname -r 2>/dev/null`
	;;
sos3 )
	OSVER=`head -1 /etc/motd | awk '{print substr($5,1,3)}' 2>/dev/null`
	;;
sos4 | sos5 | hpux | u4_* | irix4 | irix5 )
	if [ -f /bin/uname ]; then
		OSVER=`/bin/uname -r 2>/dev/null`
	elif [ -f /usr/5bin/uname ]; then
		OSVER=`/usr/5bin/uname -r 2>/dev/null`
	fi
	;;

rtu* | osf1 )
	OSVER=`uname -r 2>/dev/null`
	;;

next )
	OSVER=`PATH=/usr/bin:/bin hostinfo | \
		PATH=/usr/bin:/bin awk '/NeXT Mach/{print $3}' | \
		PATH=/usr/bin:/bin tr -d ':' 2>/dev/null`
	;;
mach3 )
	# get various info pieces from different programs.  Ugly.
	OSVER=`/usr/mach3/bin/hostinfo | grep 'VERSION(' | sed -e 's/^.*VERSION(//g' -e 's/).*$//g'`'+'`strings /vmunix | grep 'VERSION(' | sed -e 's/^.*VERSION(//g' -e 's/).*$//g'`
	;;
mach2 )
	# Try to capture both the microkernel version and server
	OSVER=`PATH=/bin:/usr/bin:/usr/etc:/usr/cs/etc version | PATH=/bin:/usr/bin:/usr/etc tr '()/' ' ' | PATH=/bin:/usr/bin:/usr/etc awk '/Mach/{print $2"+"$4}' 2>/dev/null`
	;;
linux )
	# Linux has the version and revision in the -r flag of uname.
	if [ -f /bin/uname ]; then
		OSVER=`/bin/uname -r 2>/dev/null`
	elif [ -f /usr/bin/uname ]; then
		OSVER=`/usr/bin/uname -r 2>/dev/null`
	fi
	;;
netbsd | freebsd | bsd44 )
	# *BSD variants has the version and revision in the -r flag of uname.
	if [ -f /bin/uname ]; then
		OSVER=`/bin/uname -r 2>/dev/null`
	elif [ -f /usr/bin/uname ]; then
		OSVER=`/usr/bin/uname -r 2>/dev/null`
	fi
	;;
* )
	#
	# Do the best you can.  First look for the uname program
	#
	if [ -f /bin/uname ]; then
		echo '# found in /bin/uname' >&2
		OSVER=`/bin/uname -r 2>/dev/null`-`/bin/uname -v 2>/dev/null`
	elif [ -f /usr/bin/uname ]; then
		echo '# found in /usr/bin/uname' >&2
		OSVER=`/usr/bin/uname -r 2>/dev/null`-`/usr/bin/uname -v 2>/dev/null`
	fi
esac


if [ "x${OSVER}" = "x-" -o "x${OSVER}" = "x" ]; then
	# Check if unknown O/S version, and return nothing
	OSVER="unknown"
	echo "#	... OS Version appears to be \"${OSVER}\"" >&2
else
	echo "#	... OS Version appears to be \"${OSVER}\"" >&2
fi

echo "${OSVER}"
exit 0
