--- 011-old/clone.c	2021-07-04 17:44:05.000000000 +0800
+++ 011/clone.c	2021-07-07 10:42:29.000000000 +0800
@@ -21,7 +21,7 @@
 	va_start(arg,child_stack);
 	__asm__("int $0x80"
 		:"=a" (res)
-		:"0" (__NR_open),"b" (fn),"c" (child_stack),
+		:"0" (__NR_clone),"b" (fn),"c" (child_stack),
 		"d" (va_arg(arg,int)));
 	if (res>=0)
 		return res;
@@ -36,7 +36,7 @@
 static int child_func(void * arg){
     g_shared = 1;
     printf("  Child says hello.\n");
-    return 0;
+    exit(0);
 }
 
 void test_clone(void){