#! /bin/sh

# ident "@(#)postremove	1.7	95/02/28 SMI"
# SUNWpcmem postremove script

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

NAMEMAJOR="${BASEDIR}/etc/name_to_major"
MINORPERM="${BASEDIR}/etc/minor_perm"
DEVLINKTB="$BASEDIR/etc/devlink.tab"
DRIVERALS="$BASEDIR/etc/driver_aliases"

if test ! -f ${NAMEMAJOR} -o ! -w ${NAMEMAJOR}
then
	echo "rem_major: data file \'${NAMEMAJOR}\' is missing/inacessible." >&2
	exit 1
fi

if test ! -f ${MINORPERM} -o ! -w ${MINORPERM}
then
	echo "rem_minor: data file \'${MINORPERM}\' is missing/inacessible." >&2
	exit 1
fi

if test ! -f ${DEVLINKTB} -o ! -w ${DEVLINKTB}; then
	echo "rem_devlink: data file ${DEVLINKTB} is missing/inacessible." >&2
	exit 1
fi

if test ! -f ${DRIVERALS} -o ! -w ${DRIVERALS}; then
	echo "add_drv_alias: data file ${DRIVERALS} is missing/inacessible." >&2
	exit 1
fi

trap "rm -f /tmp/$$.*;exit" 0 1 2 3 13 15
TMP=/tmp/$$

# removes major numbers from system for device drivers
# Usage:
#	rem_major name1 name2 name3 name4 ....

rem_major()
{
sort +1 -2n ${NAMEMAJOR} | nawk '#
NR == 1	{n=split(namelist,x)
	 if (n < 1)
	    exit(1)
	 for (i=1; i<=n; i++)
	    chklist[x[i]]++
	}
	{if ($1 in chklist)
		print
	}
' namelist="$*" - > $TMP.del
if [ -s $TMP.del ]
then
    fgrep -v -x -f $TMP.del ${NAMEMAJOR} | sort +1 -2n -o ${NAMEMAJOR}
fi
}


# removes minor permissions from system for device drivers
# Usage:
#	rem_minor name1 name2 name3 name4 ....
#    i.e.
#	rem_minor 'sd:*' 'sd:a'

rem_minor()
{
for p in "$@"
do echo "$p"
done | nawk '#
FILENAME != "-"	{permtab[$1] = $0;next}
FILENAME == "-"	{
		 if ($1 !~ /:/) {
			 printf("Bad name:minor pair: %s, skipping.\n", $1)
			 next
		 }
		 if ($1 in permtab)
		     print permtab[$1] >> permdel
		 next
		}
' permdel=$TMP.perm ${MINORPERM} - >&2

if [ -s $TMP.perm ]
then
    fgrep -v -x -f $TMP.perm ${MINORPERM} | sort +0 -1 -o ${MINORPERM}
fi
}


# removes entries from devlink.tab file
# Usage:
#	rem_devlink spec1 spec2 spec3 spec4 ...
#
#	where each <spec> is:
#	    <devfs-spec> <dev-name> <dev-link>
#

rem_devlink()
{
while test $# -ge 2
do
echo "$1	$2"
shift 2
done | nawk '-F	' '#
FILENAME != "-"		{devlinktab[$1] = $0;next}
FILENAME == "-"		{if ($1 in devlinktab)
			     print devlinktab[$1] >> devlinktmp
			}
' devlinktmp=$TMP.devlink ${DEVLINKTB} - >&2

if [ -s $TMP.devlink ]
then
	fgrep -v -x -f $TMP.devlink ${DEVLINKTB} > $TMP.devlinknew && \
	cp $TMP.devlinknew ${DEVLINKTB}
fi
}

# removes entries to driver_aliases file
# Usage:
#	rem_drv_alias spec1 spec2 spec3
#
#	where spec is:
#		<driver> <alias>

rem_drv_alias()
{
while test $# -ge 2
do
	echo "$1 $2"
	shift 2
done | nawk '#
FILENAME != "-"		{drvalias[$1] = $0;next}
FILENAME == "-"		{if ($1 in drvalias)
			     print drvalias[$1] >> drvaliastmp
			}
' drvaliastmp=$TMP.drvalias ${DRIVERALS} - >&2

if [ -s $TMP.drvalias ]
then
#	echo Removing 
#	cat $TMP.drvalias

	fgrep -v -x -f $TMP.drvalias ${DRIVERALS} > $TMP.drvaliasnew && \
	cp $TMP.drvaliasnew ${DRIVERALS}
fi
}

#
# manipulate the vold.conf and rmmount.conf configuration file
#
TMP=/tmp/Vo.$$

remove_token()
{

    cp $1 $TMP

    (	echo "g/$2/s///g"
	echo 'g/ $/s///g'
	echo 'w'
	echo 'q'
    ) | ed -s $TMP >/dev/null

    mv $TMP $1
}

#
# vold.conf processing
#
FILE="$BASEDIR/etc/vold.conf"

if test -f $FILE ; then

    #
    # clear out any old pcmem lines in vold.conf
    #
    fgrep -v "use pcmem" $FILE >$TMP
    mv $TMP $FILE

    #
    # clear out any old pcmem entries in vold.conf
    #
    remove_token "$FILE" 'pcmem'

fi

#
# rmmount.conf processing
#
FILE="$BASEDIR/etc/rmmount.conf"

if test -f $FILE ; then

    #
    # clear out any old pcmem entries in rmmount.conf
    #
    remove_token "$FILE" 'pcmem'

fi

#
# do the rem_drv magic
#
if [ "$BASEDIR" = "/" ]
then
	#
	# We're modifying the running system
	#
	if /usr/sbin/prtconf -v | /bin/fgrep -s "'PC,memory'"
	then
	        /usr/sbin/rem_drv pcmem
	        rc1=$?
	        /usr/sbin/rem_drv pcram
	        rc2=$?
		rc="`expr $rc1 + rc2`"
	        test $rc -eq 0 && exit 0
	        #
	        # fall through if error in rem_drv
	        #
	fi
fi
 
rem_major pcmem 
rem_major pcram
rem_minor 'PC,memory:* 0666 bin bin'
rem_drv_alias 'pcmem' 'PC,memory'
touch ${BASEDIR}/reconfigure

exit 0
