add valgrind test for mediafire-fuse and fix memleaks

tests/valgrind_fuse.sh

@@ -0,0 +1,46 @@
+#!/bin/sh
+
+set -ex
+
+case $# in
+	0)
+		source_dir="."
+		binary_dir="."
+		;;
+	2)
+		source_dir=$1
+		binary_dir=$2
+		;;
+	*)
+		echo "usage: $0 [source_dir] [binary_dir]"
+		exit 1
+		;;
+esac
+
+cmd="valgrind --suppressions="${source_dir}/valgrind.supp" --fullpath-after="$source_dir" --tool=memcheck --leak-check=yes --show-reachable=yes --num-callers=20 --track-fds=yes --track-origins=yes --error-exitcode=1 --quiet"
+
+if [ ! -f "./.mediafire-tools.conf" -a ! -f "~/.mediafire-tools.conf" ]; then
+	echo "no configuration file found" >&2
+	exit 1
+fi
+
+if [ `mount -t fuse.mediafire-fuse | wc -l` -ne 0 ]; then
+	echo "a fuse fs is already mounted" >&2
+	exit 1
+fi
+
+$cmd "${binary_dir}/mediafire-fuse" -s -f -d /mnt &
+fusepid="$!"
+
+# once the file system is found to be mounted, print the tree and unmount
+while sleep 1; do
+	if [ `mount -t fuse.mediafire-fuse | wc -l` -ne 0 ]; then
+		break;
+	fi
+done
+
+tree /mnt
+
+fusermount -u /mnt
+
+wait "$fusepid"

tests/valgrind_shell.sh

@@ -1,5 +1,7 @@
 #!/bin/sh
 
+set -e
+
 case $# in
 	0)
 		source_dir="."