X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Ftests%2Fuserprog%2Fchild-close.c;h=ac948c8efe6978e98960fceda85218b84a3c3415;hb=a03618133f7df0954802a470a4bee7674f7aed45;hp=83e3d06966cc8efabed1696a8ed5fc33f9511036;hpb=615bf3b3d2a8573ed6fb9ddc0055745e163ac999;p=pintos-anon

diff --git a/src/tests/userprog/child-close.c b/src/tests/userprog/child-close.c
index 83e3d06..ac948c8 100644
--- a/src/tests/userprog/child-close.c
+++ b/src/tests/userprog/child-close.c
@@ -1,3 +1,12 @@
+/* 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>