#!/usr/bin/ksh
#
# CDDL HEADER START
#
# The contents of this file are subject to the terms of the
# Common Development and Distribution License, Version 1.0 only
# (the "License").  You may not use this file except in compliance
# with the License.
#
# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
# or http://www.opensolaris.org/os/licensing.
# See the License for the specific language governing permissions
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#
# When distributing Covered Code, include this CDDL HEADER in each
# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
# If applicable, add the following below this CDDL HEADER, with the
# fields enclosed by brackets "[]" replaced with your own identifying
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# CDDL HEADER END
#
# Description:
#
#	Script to mount/umount the boot_archive
#
# Author:
#	Bernd Schemmer (Bernd.Schemmer@gmx.de)
#
# History
#	03.11.2008 /bs 
#		inital release
#
# Usage:
#
#	boot_archive {umount}
#
# Default action without a parameter is to mount the boot_archive 
#
# Notes:
#
# Be aware, that the files in the boot_archive are all gezipped, e.g. to view the files use something like:
#
 # gzip -cd /tmp/boot_archive/etc/path_to_inst
 #
 # or
 #
 #  gzcat /tmp/boot_archive/etc/path_to_inst
 #

# this script can run on x86 and SPARC (for OpenSolaris or Solaris 10 Update 6 and later)
#
ARCH="$( uname -m )"

case  ${ARCH} in
	sun4u | sun4us | sun4v )
		BOOT_ARCHIVE="/platform/${ARCH}/boot_archive"
		;;
		
	i86pc | i86xpv )
		[ "$( isainfo -b  )"x = "32"x ]  && ISADIR="/" || ISADIR="/amd64/"
		BOOT_ARCHIVE="/platform/i86pc${ISADIR}boot_archive"
		;;
esac

if [ ! -r "${BOOT_ARCHIVE}" ] ; then
	echo "ERROR: The boot archive \"${BOOT_ARCHIVE}\" does not exist or is not readable!"
	exit 5
fi	

echo "Using the boot archive \"${BOOT_ARCHIVE}\" ..."

# check if there is already a lofi device for the boot_archive
#
LOFI_DEV="$( lofiadm "${BOOT_ARCHIVE}" 2>/dev/null )"

MOUNT_POINT="/tmp/boot_archive"
mkdir -p "${MOUNT_POINT}"
if [ $? -ne 0 ] ; then
	echo "ERROR: error creating the temporary mountpoint \"${MOUNT_POINT}\" "
	exit 15
fi

case $1 in

	-h | --help | "-?" )
		echo "Usage: $( basename $0 ) {umount}"
		exit 1
		;;
		
	uninstall | umount )
		if [ "${LOFI_DEV}"x != ""x ] ; then
			umount ${LOFI_DEV} 2>/dev/null	
			lofiadm -d ${LOFI_DEV}
			echo "boot_archive umounted"
		else
			echo "The boot_archive is not mounted."
		fi
		;;
        
        *  )
		if [ "${LOFI_DEV}"x = ""x ] ; then
			LOFI_DEV=$( lofiadm -a "${BOOT_ARCHIVE}" )
			[ $? -ne 0 ] && exit 5
		fi      
                
		MOUNT_MSG="$( mount | grep " ${LOFI_DEV} "  )"
		if [ $? != 0 ] ; then
			FSTYP=$( fstyp ${LOFI_DEV} )
			[ ${FSTYP} ] && MSG="readonly (${FSTYP})]" ||  MSG="readwrite (${FSTYP})]"
			mount -F ${FSTYP} ${LOFI_DEV} ${MOUNT_POINT}
			[ $? -ne 0 ] && exit 10
			echo "boot_archive mounted ${MSG}: "
			mount | grep ${MOUNT_POINT}
		else
			echo "boot_archive already mounted:"
			echo "${MOUNT_MSG}"
		fi
		;;
esac