Update kernel

KernelShell/Commands/uptime.cpp

@@ -0,0 +1,51 @@
+/*
+   This file is part of Fennix Kernel.
+
+   Fennix Kernel is free software: you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation, either version 3 of
+   the License, or (at your option) any later version.
+
+   Fennix Kernel is distributed in the hope that 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 Fennix Kernel. If not, see <https://www.gnu.org/licenses/>.
+*/
+
+#include "../cmds.hpp"
+
+#include <filesystem.hpp>
+
+#include "../../kernel.h"
+
+using namespace VirtualFileSystem;
+
+void cmd_uptime(const char *)
+{
+	if (TimeManager)
+	{
+		size_t Nanoseconds =
+			TimeManager->GetNanosecondsSinceClassCreation();
+		size_t Seconds = Nanoseconds / 10000000;
+		size_t Minutes = Seconds / 60;
+		size_t Hours = Minutes / 60;
+		size_t Days = Hours / 24;
+
+		debug("Nanoseconds: %ld", Nanoseconds);
+
+		Seconds %= 60;
+		Minutes %= 60;
+		Hours %= 24;
+
+		printf("%ld days, %ld hours, %ld minutes, %ld %s\n",
+			   Days, Hours, Minutes, Seconds,
+			   Seconds == 1 ? "second" : "seconds");
+	}
+	else
+	{
+		printf("Could not get uptime\n");
+	}
+}