Fixing select call to not enforce RLIMIT_NOFILE.

Removing check to RLIMIT_NOFILE in select call.
Adding unit test to select suite to document behavior.
Moving setrlimit class from mlock to a util file for reuse.
Fixing flaky test based on comments from Jamie.

PiperOrigin-RevId: 228726131
Change-Id: Ie9dbe970bbf835ba2cca6e17eec7c2ee6fadf459

1 files changed, 32 insertions, 0 deletions

diff --git a/test/util/rlimit_util.h b/test/util/rlimit_util.h
new file mode 100644
index 000000000..fa5cc70dc
--- /dev/null
+++ b/test/util/rlimit_util.h
@@ -0,0 +1,32 @@
+// Copyright 2019 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef GVISOR_TEST_UTIL_RLIMIT_UTIL_H_
+#define GVISOR_TEST_UTIL_RLIMIT_UTIL_H_
+
+#include <sys/resource.h>
+#include <sys/time.h>
+
+#include "test/util/cleanup.h"
+#include "test/util/posix_error.h"
+#include "test/util/test_util.h"
+
+namespace gvisor {
+namespace testing {
+
+PosixErrorOr<Cleanup> ScopedSetSoftRlimit(int resource, rlim_t newval);
+
+}  // namespace testing
+}  // namespace gvisor
+#endif  // GVISOR_TEST_UTIL_RLIMIT_UTIL_H_