Everywhere: Hoist the Libraries folder to the top-level

Libraries/LibCore/SessionManagement.cpp

@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2022, Peter Elliott <pelliott@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibCore/Directory.h>
+#include <LibCore/SessionManagement.h>
+#include <LibCore/System.h>
+
+namespace Core::SessionManagement {
+
+ErrorOr<pid_t> root_session_id([[maybe_unused]] Optional<pid_t> force_sid)
+{
+    return 0;
+}
+
+ErrorOr<void> logout(Optional<pid_t> force_sid)
+{
+    pid_t sid = TRY(root_session_id(force_sid));
+    TRY(System::kill(-sid, SIGTERM));
+    return {};
+}
+
+ErrorOr<ByteString> parse_path_with_sid(StringView general_path, Optional<pid_t> force_sid)
+{
+    if (general_path.contains("%sid"sv)) {
+        pid_t sid = TRY(root_session_id(force_sid));
+        return general_path.replace("%sid"sv, ByteString::number(sid), ReplaceMode::All);
+    }
+    return ByteString(general_path);
+}
+
+ErrorOr<void> create_session_temporary_directory_if_needed(uid_t uid, gid_t gid, Optional<pid_t> force_sid)
+{
+    pid_t sid = TRY(root_session_id(force_sid));
+    auto const temporary_directory = ByteString::formatted("/tmp/session/{}", sid);
+    auto directory = TRY(Core::Directory::create(temporary_directory, Core::Directory::CreateDirectories::Yes));
+    TRY(directory.chown(uid, gid));
+    return {};
+}
+
+}