optional added

2025-03-03 18:33:08 +08:00
parent a226786836
commit 962a7083da
5 changed files with 173 additions and 154 deletions
--- a/user/uptime.c
+++ b/user/uptime.c
@ -0,0 +1,15 @@
+#include "kernel/types.h"
+#include "user/user.h"
+
+int main(int argc, char *argv[]) {
+  if (argc != 1) {
+    // 错误输出到stderr（文件描述符2）
+    fprintf(2, "Usage: uptime\n");
+    exit(1);
+  }
+
+  fprintf(1,"up: %d\n",uptime());
+  
+  exit(0);
+}
+