#!/bin/sh

# This is an example shell script that can be used as a wrapper for a
# msdos.fsck (called by the generic fsck frontend).
#
# This script is the second version. It uses a new feature of libdmsdos,
# the built-in direct translation that can access a CVF even if the host
# filesystem is not mounted. This is now the preferred way.
#
# The script accepts a standard fsck command line and decides upon the
# the raw filesystem data whether it is a CVF or not. If it is a CVF then
# dmsdosfsck is invoked.
#
# The case when it is not a CVF but an uncompressed msdos partition is a bit
# more complex. First, dosfsck is invoked to check that dos partition. Then
# the script scans its root directory for CVFs. If there are CVFs it tries 
# to check them, too, by calling dmsdosfsck on them. If the -r option is 
# present in the fsck command line, some questions are asked.
#
# Note that this script needs a helper program that finds out whether a 
# file is a CVF or not. If you have added the file(1) magics for CVFs to
# /etc/magic (see the dmsdos installation instructions) you can use a
# combination of file and grep (for example) for that purpose. I think this
# is a standard way. If you still prefer the older method (by calling the
# helper program cvftest) just compile cvftest ('make cvftest') and change 
# one lines below (I've commented out the cvftest call and placed a
# file command in the next line).

###########################################################################

# where to find the different filesystem checker utilities
DMSDOSFSCK="dmsdosfsck"
DOSFSCK="dosfsck"
CVFLIST="cvflist"

ARGS="$@"
FILE=""
ASK=n

while [ "$1" != "" ];
do
	case "$1" in
	-u) 	shift
		shift ;;
	-d)	shift
		shift ;;
	-r)	ASK=y
		shift ;;
	-*)	shift ;;
	*)	FILE="$1" 
		shift ;;
	esac;
done

#echo "ARGS=$ARGS"
#echo "FILE=$FILE"

#if cvftest $FILE ;
if [ ! -z "`file $FILE | grep CVF`" ];
then
	echo "CVF detected, calling dmsdosfsck ..."
	$DMSDOSFSCK $ARGS
	CODE="$?"
else
	echo "no CVF found, calling dosfsck ..."
	$DOSFSCK $ARGS
	CODE="$?"
	if [ "$CODE" != "0" ];
	then
		exit $CODE
	fi
	if [ $ASK = y ];
	then
		echo -n "search $FILE for CVFs in it and check them, too?"
		read ANS JUNK
		if [ "$ANS" != "y" -a "$ANS" != "Y" ];
		then
			exit 0
		fi
	fi
        CVFS=`$CVFLIST $FILE`
        if [ -z "$CVFS" ];
        then
		echo "no CVFs found."
		exit 0
	fi

	CODE="0"
	for I in $CVFS
	do
		I=`echo $I | cut -f2 -d.`
		echo "checking CVF with ext $I ..."
		$DMSDOSFSCK $ARGS $FILE:$I
		if [ "$?" != "0" ];
		then
			CODE="$?"
		fi
	done
fi

exit $CODE