Clarify how a file descriptor could still be more than the limit
It can happen if the file descriptor was opened before lowering the limit.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/tests/suites/test_suite_net.function b/tests/suites/test_suite_net.function
index 111a349..f429fc9 100644
--- a/tests/suites/test_suite_net.function
+++ b/tests/suites/test_suite_net.function
@@ -94,6 +94,10 @@
* If the limit can't be raised, a file descriptor opened by the
* net_sockets module will be less than FD_SETSIZE, so the test
* is not necessary and we mark it as skipped.
+ * A file descriptor could still be higher than FD_SETSIZE if it was
+ * opened before the limit was lowered (which is something an application
+ * might do); but we don't do such things in our test code, so the unit
+ * test will run if it can.
*/
TEST_ASSERT( getrlimit( RLIMIT_NOFILE, &rlim_nofile ) == 0 );
if( rlim_nofile.rlim_cur < FD_SETSIZE + 1 )
