+/* Child process run by multi-child-fd test.
+
+ Attempts to close the file descriptor passed as the first
+ command-line argument. This is invalid, because file
+ descriptors are not inherited in Pintos. Two results are
+ allowed: either the system call should return without taking
+ any action, or the kernel should terminate the process with a
+ -1 exit code. */
+
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>