tests: Wrap the fuzzer test in a script

Wrap the fuzzer test in a script to we can set up a per fuzzer
temporary directory where the NvChip file is written into.

Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>

README

@@ -88,7 +88,7 @@ Fuzz testing is known to work with Fedora 28 or later. It requires that the
 Ex:
 $ ./configure --with-openssl --with-tpm2 --enable-sanitizers --enable-fuzzer CC=clang
 $ make && make -C tests fuzz
-$ tests/fuzz tests/corpus-execute-command
+$ tests/run-fuzzer.sh
 
 Maintainers
 -----------

tests/run-fuzzer.sh

@@ -0,0 +1,34 @@
+#!/usr/bin/env bash
+
+# For the license, see the LICENSE file in the root directory.
+
+DIR=${PWD}/$(dirname "$0")
+ROOT=${DIR}/..
+WORKDIR=$(mktemp -d)
+export LD_LIBRARY_PATH=${ROOT}/src/.libs
+
+if ! [ -d ${LD_LIBRARY_PATH} ]; then
+	echo "Wrong path to libtpms library: ${LD_LIBRARY_PATH}"
+	exit 1
+fi
+
+if ! [ -f "$(readlink -f ${LD_LIBRARY_PATH}/libtpms.so)" ]; then
+	echo "Cannot find libtpms at ${LD_LIBRARY_PATH}/libtpms.so"
+	exit 1
+fi
+
+function cleanup()
+{
+	rm -rf ${WORKDIR}
+}
+
+trap "cleanup" QUIT EXIT
+
+pushd $WORKDIR
+
+${DIR}/fuzz $@ ${DIR}/corpus-execute-command
+rc=$?
+
+popd
+
+exit $rc