1 files changed, 59 insertions, 0 deletions
diff --git a/test/syscalls/linux/sync.cc b/test/syscalls/linux/sync.cc
new file mode 100644
index 000000000..8aa2525a9
--- /dev/null
+++ b/test/syscalls/linux/sync.cc
@@ -0,0 +1,59 @@
+// Copyright 2018 The gVisor Authors.
+//
+// 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 <fcntl.h>
+#include <stdio.h>
+#include <sys/syscall.h>
+#include <unistd.h>
+
+#include <string>
+
+#include "gtest/gtest.h"
+#include "test/util/temp_path.h"
+#include "test/util/test_util.h"
+
+namespace gvisor {
+namespace testing {
+
+namespace {
+
+TEST(SyncTest, SyncEverything) {
+  ASSERT_THAT(syscall(SYS_sync), SyscallSucceeds());
+}
+
+TEST(SyncTest, SyncFileSytem) {
+  int fd;
+  auto f = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
+  ASSERT_THAT(fd = open(f.path().c_str(), O_RDONLY), SyscallSucceeds());
+  EXPECT_THAT(syncfs(fd), SyscallSucceeds());
+  EXPECT_THAT(close(fd), SyscallSucceeds());
+}
+
+TEST(SyncTest, SyncFromPipe) {
+  int pipes[2];
+  EXPECT_THAT(pipe(pipes), SyscallSucceeds());
+  EXPECT_THAT(syncfs(pipes[0]), SyscallSucceeds());
+  EXPECT_THAT(syncfs(pipes[1]), SyscallSucceeds());
+  EXPECT_THAT(close(pipes[0]), SyscallSucceeds());
+  EXPECT_THAT(close(pipes[1]), SyscallSucceeds());
+}
+
+TEST(SyncTest, CannotSyncFileSytemAtBadFd) {
+  EXPECT_THAT(syncfs(-1), SyscallFailsWithErrno(EBADF));
+}
+
+}  // namespace
+
+}  // namespace testing
+}  // namespace gvisor