fs: add MountImageDirectory

libraries/libstratosphere/source/fs/fs_image_directory.cpp

@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2018-2020 Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <stratosphere.hpp>
+#include "fsa/fs_mount_utils.hpp"
+
+namespace ams::fs {
+
+    Result MountImageDirectory(const char *name, ImageDirectoryId id) {
+        /* Validate the mount name. */
+        R_TRY(impl::CheckMountName(name));
+
+        /* Open the image directory. This uses libnx bindings. */
+        FsFileSystem fs;
+        R_TRY(fsOpenImageDirectoryFileSystem(std::addressof(fs), static_cast<::FsImageDirectoryId>(id)));
+
+        /* Allocate a new filesystem wrapper. */
+        auto fsa = std::make_unique<RemoteFileSystem>(fs);
+        R_UNLESS(fsa != nullptr, fs::ResultAllocationFailureInImageDirectoryA());
+
+        /* Register. */
+        return fsa::Register(name, std::move(fsa));
+    }
+
+}