1 files changed, 28 insertions, 0 deletions
diff --git a/src/tests/userprog/child-close.c b/src/tests/userprog/child-close.c
new file mode 100644
index 0000000..ac948c8
--- /dev/null
+++ b/src/tests/userprog/child-close.c
@@ -0,0 +1,28 @@
+/* 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>
+#include <syscall.h>
+#include "tests/lib.h"
+
+const char *test_name = "child-close";
+
+int
+main (int argc UNUSED, char *argv[]) 
+{
+  msg ("begin");
+  if (!isdigit (*argv[1]))
+    fail ("bad command-line arguments");
+  close (atoi (argv[1]));
+  msg ("end");
+
+  return 0;
+}