#! /bin/sh
# $Header$
#
#***************************************************************************
# $Copyright: Copyright (c) 2022 Veritas Technologies LLC. All rights reserved $
#***************************************************************************
#
# bpvxver.sh
#
# This script is called by the VfMS vxvm and vxfs FMMs to determine the 
# version of VxFS (JFS) or VxVM running on an HP-UX system. It is intended
# for use only by those FMMs and only on an HP-UX system.
#
# This script:
#	Receives 1 parameter, indicating the product for which the version
#		is to be returned. The product may be either "VxFS" or "VxVM".
#	Must be executable by the root user
#	Should exit with a value which is ten times the version number of the
#		product. For example, if the product version is "3.2", the
#		script should exit with a value of 32.
#	Should exit with a 0 if the product is not installed on the system.
#
# This script should be installed with mode 555 so that user directed
# backups and archives will be able to execute this script.
#

DEBUG=0		# Set to non-zero to debug script
SWLIST=/usr/sbin/swlist
PRODUCT=
ME=`basename $0`

#
# error(message) - Issue error message, set exit code, and exit
#
error() {
    echo "$ME: $1" >&2;
    exit 0;
}

#
# isver(version) - Issue message, set exit code, and exit
#
# Assumes that <version> is in the form [0-9].[0-9].*
# Anything beyond the first two digits is ignored.
#
isver() {
    rval=`echo $1 | sed 's/\([0-9]\)\.\([0-9]\).*/\1\2/'`	# "Multiply" by ten by removing decimal point
    echo "$ME: $PRODUCT is version $1; returning $rval";
    exit $rval;
}
    
# --------------------------------------------------------------------
# main script starts here
# --------------------------------------------------------------------

# Set umask to 022 to make sure files and directories
# are not created with world writable permissions.
umask 022

if [ `uname -s` != "HP-UX" ]
then
    error "This script is for use on HP-UX systems only"
fi

if [ "$#" -lt 1 ]
then
    error "No product specified"
fi

if [ "$#" -gt 1 ]
then
    error "Only one product may be specified"
fi

PRODUCT=$1
case "$PRODUCT" in
    VxFS) ;;
    VxVM) ;;
    *)
	error "Product must be either VxFS or VxVM";
	;;
esac

if [ "$PRODUCT" = "VxFS" ]
then
    
    if [ 0 -ne $DEBUG ]
    then
    	#
    	# Just dump ${SWLIST} information for the kernel for debugging the script
	#
	${SWLIST} -l fileset | grep VXFS-BASE-KRN
    fi

    #
    # The methods of detection below have proven insufficient. Just
    # hard-code the return of version 3.5 for HP11.11.
    #
    os=`uname -r`
    case "${os}" in
	"B.11.11")
		isver "3.5";;
	*)
		isver "3.5";;
    esac

    #
    # First, look for the VRTSvxfs package.
    #
    vxfs=`${SWLIST} -l fileset | grep '^[ 	]*VRTSvxfs.VXFS-KRN' | sed 's/[ 	]*VRTSvxfs.VXFS-KRN[ 	][ 	]*\([^ 	][^ 	]*\).*/\1/'`
    case "$vxfs" in
	"B.11.11")
		isver "3.3";
		;;
	3.1* | 3.2* | 3.3* | 3.4* | 3.5*)
		isver "$vxfs";
		;;
	*)
	    #
	    # Next, look for JFS, which will appear on HP-UX 11.11.
	    #
	    vxfs=`${SWLIST} -l fileset | grep '^[ 	]*JFS.VXFS-BASE-KRN' | sed 's/[ 	]*JFS.VXFS-BASE-KRN[ 	][ 	]*\([^ 	][^ 	]*\).*/\1/'`
	    case "$vxfs" in
		"B.11.11")
		    isver "3.3";
		    ;;
		3.1* | 3.2* | 3.3* | 3.4* | 3.5*)
		    isver "$vxfs";
		    ;;
		*)
		    #
		    # Failing JFS, look for JournalFS.
		    #
		    vxfs=`${SWLIST} -l fileset | grep '^[ 	]*JournalFS.VXFS-BASE-KRN' | sed 's/[ 	]*JournalFS.VXFS-BASE-KRN[ 	][ 	]*\([^ 	][^ 	]*\).*/\1/'`
		    case "$vxfs" in
			"B.11.11")
			    isver "3.3";
			    ;;
			3.1* | 3.2* | 3.3* | 3.4* | 3.5*)
			    isver "$vxfs";
			    ;;
			*)
			    error "No VxFS found";
			    ;;
		    esac
		    ;;
	esac
	;;
		    
    esac
fi

if [ "$PRODUCT" = "VxVM" ]
then
    if [ 0 -ne $DEBUG ]
    then
	#
	# Just dump ${SWLIST} information for the kernel for debugging the script
	#
	${SWLIST} -l product | grep -E 'VRTSvxvm|HPvxvm'
    fi

    #
    # First, figure out which package is installed, VRTSvxvm or HPvxvm.
    # Only the first "vxvm" product found is used.
    #
    package=`${SWLIST} -l product | grep -E 'VRTSvxvm|HPvxvm' | sed 's/^[ 	]*\([A-Z]*vxvm\)[ 	].*$/\1/p;q'`
    if [ 0 -ne $DEBUG ]
    then
	echo Package is $package
    fi
    #
    # Next, get the version number. If no appropriate package was found, exit with error.
    #
    case "$package" in
	HPvxvm)
	    vxvm=`${SWLIST} -a revision -l product $package | grep '^[ 	]*'$package | sed 's/^[ 	]*'$package'[ 	][ 	]*B\.0\([0-9]\.[0-9]\)[0-9.]*.*$/\1/'`
	    isver "$vxvm";
	    ;;
	VRTSvxvm)
	    vxvm=`${SWLIST} -a revision -l product $package | grep '^[ 	]*'$package | sed 's/^[ 	]*'$package'[ 	][ 	]*\([0-9.][0-9.]*\).*$/\1/'`
	    isver "$vxvm";
	    ;;
	*)
	    error "No VxVM found";
	    ;;
    esac
fi

exit 0