From 44634e2eeac6bef525e08d97c1bf4bea8c4c5f03 Mon Sep 17 00:00:00 2001
From: Richard Qin <richard.qin.x@gmail.com>
Date: Wed, 13 May 2026 16:26:19 +0800
Subject: feat: implement sys_uname for system information retrieval

---
 na/kernel/sys_info.cc | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 na/kernel/sys_info.cc

(limited to 'na/kernel/sys_info.cc')

diff --git a/na/kernel/sys_info.cc b/na/kernel/sys_info.cc
new file mode 100644
index 0000000..79baab0
--- /dev/null
+++ b/na/kernel/sys_info.cc
@@ -0,0 +1,49 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/* Copyright (C) 2026 Richard Qin */
+
+/*
+ * System Information Calls
+ *
+ * Implements: uname
+ *
+ * Reference: docs/specs/syscall.md §7.3
+ */
+
+#include <lume/types.h>
+#include <lume/errno.h>
+#include <lume/uaccess.h>
+
+/* Linux-compatible utsname structure (65-byte fields) */
+struct utsname {
+    char sysname[65];
+    char nodename[65];
+    char release[65];
+    char version[65];
+    char machine[65];
+    char domainname[65];
+};
+
+/* Simple safe string copy */
+static void safe_strncpy(char* dst, const char* src, uint64 n)
+{
+    uint64 i = 0;
+    for (; i < n - 1 && src[i] != '\0'; i++)
+        dst[i] = src[i];
+    dst[i] = '\0';
+}
+
+int64 sys_uname(uint64 buf_ptr, uint64, uint64, uint64, uint64, uint64)
+{
+    utsname info = {};
+    safe_strncpy(info.sysname,    "LumeOS",  sizeof(info.sysname));
+    safe_strncpy(info.nodename,   "lume",    sizeof(info.nodename));
+    safe_strncpy(info.release,    "0.1.0",   sizeof(info.release));
+    safe_strncpy(info.version,    "Phase 2", sizeof(info.version));
+    safe_strncpy(info.machine,    "riscv64", sizeof(info.machine));
+    safe_strncpy(info.domainname, "(none)",  sizeof(info.domainname));
+
+    if (copy_to_user(buf_ptr, &info, sizeof(info)) < 0)
+        return -EFAULT;
+
+    return 0;
+}
-- 
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