Open source system call tests.

PiperOrigin-RevId: 224886231
Change-Id: I0fccb4d994601739d8b16b1d4e6b31f40297fb22

1 files changed, 51 insertions, 0 deletions

diff --git a/test/syscalls/linux/syslog.cc b/test/syscalls/linux/syslog.cc
new file mode 100644
index 000000000..5bd0d1cc3
--- /dev/null
+++ b/test/syscalls/linux/syslog.cc
@@ -0,0 +1,51 @@
+// Copyright 2018 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.
+
+#include <sys/klog.h>
+#include <sys/syscall.h>
+#include <unistd.h>
+
+#include "gtest/gtest.h"
+#include "test/util/test_util.h"
+
+namespace gvisor {
+namespace testing {
+
+namespace {
+
+constexpr int SYSLOG_ACTION_READ_ALL = 3;
+constexpr int SYSLOG_ACTION_SIZE_BUFFER = 10;
+
+int Syslog(int type, char* buf, int len) {
+  return syscall(__NR_syslog, type, buf, len);
+}
+
+// Only SYSLOG_ACTION_SIZE_BUFFER and SYSLOG_ACTION_READ_ALL are implemented in
+// gVisor.
+
+TEST(Syslog, Size) {
+  EXPECT_THAT(Syslog(SYSLOG_ACTION_SIZE_BUFFER, nullptr, 0), SyscallSucceeds());
+}
+
+TEST(Syslog, ReadAll) {
+  // There might not be anything to read, so we can't check the write count.
+  char buf[100];
+  EXPECT_THAT(Syslog(SYSLOG_ACTION_READ_ALL, buf, sizeof(buf)),
+              SyscallSucceeds());
+}
+
+}  // namespace
+
+}  // namespace testing
+}  // namespace gvisor