sprofile: implement OpenProfileUpdateObserver

libraries/libstratosphere/source/sprofile/srv/sprofile_srv_fs_utils.cpp

@@ -0,0 +1,39 @@
+/*
+ * 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 "sprofile_srv_profile_manager.hpp"
+
+namespace ams::sprofile::srv {
+
+    Result WriteFile(const char *path, const void *src, size_t size) {
+        /* Create the file. */
+        R_TRY_CATCH(fs::CreateFile(path, size)) {
+            R_CATCH(fs::ResultPathAlreadyExists) { /* It's okay if the file already exists. */ }
+        } R_END_TRY_CATCH_WITH_ABORT_UNLESS;
+
+        /* Open the file. */
+        fs::FileHandle file;
+        R_ABORT_UNLESS(fs::OpenFile(std::addressof(file), path, fs::OpenMode_Write));
+        ON_SCOPE_EXIT { fs::CloseFile(file); };
+
+        /* Set the file size. */
+        R_ABORT_UNLESS(fs::SetFileSize(file, size));
+
+        /* Write the file. */
+        return fs::WriteFile(file, 0, src, size, fs::WriteOption::Flush);
+    }
+
+}