Index: leakcheck/leakcheck
==================================================================
--- leakcheck/leakcheck
+++ leakcheck/leakcheck
@@ -1,10 +1,19 @@
 #! /bin/bash
 
+LEAKCHECKFILE="$1"
 TMPFILE="${TMPDIR:-/tmp}/malloc-free-check-$$${RANDOM}${RANDOM}${RANDOM}.tmp"
+export LEAKCHECKFILE TMPFILE
+
+if [ -z "${LEAKCHECKFILE}" ]; then
+	echo "Usage: leakcheck <filename>" >&2
+	echo "         filename       Name of file containing debugging output" >&2
+
+	exit 1
+fi
 
-egrep '(MALLOC|FREE|REALLOC)' "$@" | sed 's@^.*FREE(\(0x[0-9a-f]*\)).*$@free \1@;s@^.*MALLOC() = @malloc @;s@^.*REALLOC(\(0x[0-9a-f]*\)) = @realloc \1 @' > "${TMPFILE}"
+egrep '(MALLOC|FREE|REALLOC)' "${LEAKCHECKFILE}" | sed 's@^.*FREE(\(0x[0-9a-f]*\)).*$@free \1@;s@^.*MALLOC() = @malloc @;s@^.*REALLOC(\(0x[0-9a-f]*\)) = @realloc \1 @' > "${TMPFILE}"
 
 cat "${TMPFILE}" | while read op addr newaddr; do
 	case "${op}" in
 		malloc)
 			if [ -z "${alloclist}" ]; then
@@ -36,18 +45,18 @@
 		case "${leftover}" in
 			!*)
 				leftover="$(echo "${leftover}" | cut -c 2-)"
 
 				echo "Double freed or never allocated ${leftover}:"
-				grep "${leftover}" "$@" | sed 's@^@    @'
+				grep "${leftover}" "${LEAKCHECKFILE}" | sed 's@^@    @'
 				echo ''
 				;;
 			*)
 				echo "Unfreed memory ${leftover}:"
-				grep "${leftover}" "$@" | sed 's@^@    @'
+				grep "${leftover}" "${LEAKCHECKFILE}" | sed 's@^@    @'
 				echo ''
 				;;
 		esac
 	done
 done
 
 rm -f "${TMPFILE}"