#!/bin/sh

check=0
status=0

while [ x"$1" != x ]; do
	case $1 in
	-c)
		check=1
		shift
		continue;;
	--status)
		status=1
		shift
		continue;;
	-*)
		if [ $status = 0 ]; then
			echo "Unrecognized option $1" 1>&2
		fi
		exit 1
		;;
	*)
		dst=$1
		shift
		continue;;
	esac
done

if [ x"$dst" = x ]; then
	if [ $status = 0 ]; then
		echo "Usage: $0 [<options>] <filename>" 1>&2
	fi
	exit 1
fi

if [ $check = 1 ]; then
	if [ -f $dst ]; then
		sum1=`cut -d' ' -f1 $dst`
		file=`cut -d' ' -f3 $dst`
		sum2=`openssl sha1 $file | cut -d' ' -f2`
		if [ x"$sum1" = x"$sum2" ]; then
			if [ $status = 0 ]; then
				echo "$dst: OK"
			fi
			exit 0
		else
			if [ $status = 0 ]; then
				echo "$dst: FAILED"
			fi
			exit 1
		fi
	else
		echo "$0: $dst: No such file or directory" 1>&2
		exit 1
	fi
else
	if [ x"$status" = x1 ]; then
		echo "$0: the --status option is meaningful only when verifying checksums" 1>&2
		exit 1
	fi

	if [ -f $dst ]; then
		sum=`openssl sha1 $dst | cut -d' ' -f2`
		echo "$dst  $sum"
		exit 0
	else
		echo "$0: $dst: No such file or directory" 1>&2
		exit 1
	fi
fi