feat: e100e Ethernet driver, ramdisk reorganization, shell rewrite, web server/client, and more

programs/src/uptime/main.cpp

@@ -0,0 +1,40 @@
+/*
+    * main.cpp
+    * uptime - Show system uptime
+    * Copyright (c) 2025-2026 Daniel Hammer
+*/
+
+#include <zenith/syscall.h>
+
+static void print_int(uint64_t n) {
+    if (n == 0) {
+        zenith::putchar('0');
+        return;
+    }
+    char buf[20];
+    int i = 0;
+    while (n > 0) {
+        buf[i++] = '0' + (n % 10);
+        n /= 10;
+    }
+    for (int j = i - 1; j >= 0; j--) {
+        zenith::putchar(buf[j]);
+    }
+}
+
+extern "C" void _start() {
+    uint64_t ms = zenith::get_milliseconds();
+    uint64_t secs = ms / 1000;
+    uint64_t mins = secs / 60;
+    secs %= 60;
+    ms %= 1000;
+
+    zenith::print("Uptime: ");
+    print_int(mins);
+    zenith::print("m ");
+    print_int(secs);
+    zenith::print("s ");
+    print_int(ms);
+    zenith::print("ms\n");
+    zenith::exit(0);
+}