#!/bin/sh
#
#ident	"@(#)i.voldconf	1.18	06/01/20 SMI"
#
# Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
# Use is subject to license terms.
#

PATH="/usr/bin:/usr/sbin:${PATH}"
export PATH

add_remount_lines()
{

	# add the new remount lines after the notify line

	source_file="$1"
	dest_file="$2"

	if grep "^remount" $dest_file > /dev/null 2>&1; then
		:
	else
		line_number=`grep -n "^insert dev/dsk" $dest_file | \
			tail -1 | awk -F: '{print $1}'`
		if [ -n "$line_number" ] ; then
			sed -e "$line_number a\\
remount dev/dsk/* user=root /usr/sbin/rmmount" $dest_file > /tmp/tmp.$$
			cp /tmp/tmp.$$ $dest_file
		fi

		line_number=`grep -n "^insert dev/diskette" $dest_file | \
			tail -1 | awk -F: '{print $1}'`
		if [ -n "$line_number" ] ; then
			sed -e "$line_number a\\
remount dev/diskette[0-9]/* user=root /usr/sbin/rmmount" $dest_file > \
				/tmp/tmp.$$
			cp /tmp/tmp.$$ $dest_file
		fi

		rm -f /tmp/tmp.$$
	fi
}

#
# update_use_line:
#
# takes three params:
#	1. dest file name;
#	2. new line to go after last 'use ...' line;
#	3. old line to delete;
#
# algorithm:
#	if the "$new" line is already in the file "$d", then return, else
#	find the line number of the last "use ..." line in the "$d" file
#	add the supplied "$new" line after the current last "use ..." line
#	if the "$old" line is in the file, remove it
#
update_use_line()
{

	d="$1"
	new="$2"
	old="$3"

	# check for the "$new line"
	if fgrep "$new" $d >/dev/null 2>&1 ; then
		return		# no work needs to be done
	fi

	# find last '^use ...' line
	line_no="`grep -n '^use' $d|tail -1|awk -F: '{print $1}'`"

	# add new line after last '^use ...' line
	sed -e "$line_no a\\
$new" $d > /tmp/tmp.$$

	# copy temp file back to dest file, removing old line (if present)
	grep -v "^$old" /tmp/tmp.$$ > $d
}

#
# update_notify_line
#
# takes one param:
#	1. dest file name;
#
# algorithm:
#	- find the current "notify ..." line
#	- if the current line ends with "-c" and the line has no 'use='
#	  clause, then
#		- change the "-c" to a "-p", and
#		- add a 'user=root' clause
#
update_notify_line()
{

	d="$1"


	# get the current notify line
	nl="`grep '^notify' $d`"

	# check for "-c"
	echo "$nl" | grep ' -c$' >/dev/null 2>&1
	if [ $? != 0 ] ; then
		# '-c' not found
		return		# not an orig line -- just leave it alone
	fi

	# check for not having a 'user=' clause
	echo "$nl" | grep ' user=' >/dev/null 2>&1
	if [ $? = 0 ] ; then
		# 'user=' found
		return		# not an orig line -- just leave it alone
	fi

	# update the notify line to have a 'user=root' and a '-p'
	sed -e "/^notify/s~/usr/lib~user=root /usr/lib~" \
	    -e "/^notify/s~-c~-p~" $d > /tmp/tmp.$$

	# move result back
	mv /tmp/tmp.$$ $d
}

update_label_sun_line()
{
        d="$1"

        # get the line and check if up to date
        if grep '^label sun .* rmscsi' $d >/dev/null 2>&1 ; then
                :
        elif grep '^label sun .* rmdisk' $d >/dev/null 2>&1 ; then
                :
        else
                #edit label sun line
                sed -e '/^label sun label_sun/ s/$/ rmscsi/' \
                        $dest >/tmp/tmp.$$
                cp /tmp/tmp.$$ $dest

                # clean up
                rm -f /tmp/*.$$
        fi
}

update_label_dos_line()
{
        d="$1"

        # get the line and check if up to date
        if grep '^label dos .* rmscsi' $d >/dev/null 2>&1 ; then
                :
        elif grep '^label dos .* rmdisk' $d >/dev/null 2>&1 ; then
                :
        else
                #edit label dos line
                sed -e '/^label dos label_dos/ s/$/ rmscsi/' \
                        $dest >/tmp/tmp.$$
                cp /tmp/tmp.$$ $dest

                # clean up
                rm -f /tmp/*.$$
        fi
}

update_unsafe_udfs_line()
{
        d="$1"

	LINE=`grep '^unsafe' $d`
	for word in $LINE
	do
		if [ $word = "udfs" ]
		then
			return
		fi
	done
	LINE="$LINE udfs"
	grep -v '^unsafe' $d >/tmp/tmp.$$
	echo $LINE >>/tmp/tmp.$$
	cp /tmp/tmp.$$ $d
}

add_support_nomedia_lines()
{

        # add the new support nomedia lines after the db line

        source_file="$1"
        dest_file="$2"

        if grep "^support" $dest_file > /dev/null 2>&1; then
                :
        else
                line_number=`grep -n "^db db_mem.so" $dest_file | \
                        tail -1 | awk -F: '{print $1}'`
                if [ -n "$line_number" ] ; then
			line_number=`expr $line_number + 1`
                        sed -e "$line_number a\\
# Volfs support of removable media devices" $dest_file > /tmp/tmp.$$ 
			cp /tmp/tmp.$$ $dest_file
			line_number=`expr $line_number + 1`
			sed -e "$line_number a\\
support nomedia" $dest_file > /tmp/tmp.$$
			cp /tmp/tmp.$$ $dest_file
			line_number=`expr $line_number + 1`
			sed -e "$line_number a\\
" $dest_file > /tmp/tmp.$$
			cp /tmp/tmp.$$ $dest_file
                fi

                rm -f /tmp/tmp.$$
        fi
}

while read src dest
do
	if [ ! -f $dest ] ; then
		cp $src $dest
	else
		# save the 'ident' line from the 'new' file
		grep '@(#)vold.conf' $src \
		    > /tmp/newident.$$ 2>/dev/null

		# save all but the 'ident' line from the old (orig) file
		grep -v '@(#)vold.conf' $dest \
		    > /tmp/rest.$$ 2>/dev/null

		# concatenate the new ident and the old data, replacing old
		cat /tmp/newident.$$ /tmp/rest.$$ > $dest

		# convert '/dev/fd' to '/dev/diskette' wherever found
		sed -e 's,/dev/fd\[,/dev/diskette[,' $dest > /tmp/tmp.$$
		cp /tmp/tmp.$$ $dest

		# get the new 'use cdrom ...' line
		new_use_line="`grep '^use cdrom drive' $src`"

		# ensure that default cdrom line is up to date
		update_use_line $dest "$new_use_line" \
		    'use cdrom drive /dev/dsk/c0t6 dev_cdrom.so cdrom0'

		# get the new 'use floppy ...' line
		new_use_line="`grep '^use floppy drive' $src`"

		# ensure that default floppy line is up to date
		update_use_line $dest "$new_use_line" \
		    'use floppy drive /dev/diskette dev_floppy.so floppy0'

		# get the new 'use rmscsi ...' line
		new_use_line="`grep '^# use rmscsi drive' $src`"

		# ensure that default floppy line is up to date
		update_use_line $dest "$new_use_line" \
		    '# there is no old rmscsi line'

		# update the volmissing line (if it hasn't changed)
		update_notify_line $dest

		# update the action lines
		sed -e '/^# Action/,/^$/ s,/vol\*/,,' $dest >/tmp/tmp.$$
		cp /tmp/tmp.$$ $dest

                # ensure that the label_dos and label_sun lines are current
                update_label_sun_line $dest 
                update_label_dos_line $dest
		# ensure unsafe line has udfs
		update_unsafe_udfs_line $dest

		# replace "rmscsi" with "rmdisk" everywhere in the file

		sed -e 's/rmscsi/rmdisk/g' $dest > /tmp/tmp.$$
		cp /tmp/tmp.$$ $dest

		# add the new "remount" lines

		add_remount_lines $src $dest

		add_support_nomedia_lines $src $dest

		# restore permissions if they changed
		chmod 0444 $dest
		chgrp bin $dest

		# clean up

		rm -f /tmp/*.$$

	fi
done

exit 0