1 files changed, 82 insertions, 0 deletions
diff --git a/test/syscalls/linux/statfs.cc b/test/syscalls/linux/statfs.cc
new file mode 100644
index 000000000..aca51d30f
--- /dev/null
+++ b/test/syscalls/linux/statfs.cc
@@ -0,0 +1,82 @@
+// 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 <sys/statfs.h>
+#include <unistd.h>
+
+#include "gtest/gtest.h"
+#include "test/util/file_descriptor.h"
+#include "test/util/temp_path.h"
+#include "test/util/test_util.h"
+
+namespace gvisor {
+namespace testing {
+
+namespace {
+
+TEST(StatfsTest, CannotStatBadPath) {
+  auto temp_file = NewTempAbsPathInDir("/tmp");
+
+  struct statfs st;
+  EXPECT_THAT(statfs(temp_file.c_str(), &st), SyscallFailsWithErrno(ENOENT));
+}
+
+TEST(StatfsTest, InternalTmpfs) {
+  auto temp_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
+
+  struct statfs st;
+  EXPECT_THAT(statfs(temp_file.path().c_str(), &st), SyscallSucceeds());
+}
+
+TEST(StatfsTest, InternalDevShm) {
+  struct statfs st;
+  EXPECT_THAT(statfs("/dev/shm", &st), SyscallSucceeds());
+}
+
+TEST(StatfsTest, NameLen) {
+  struct statfs st;
+  EXPECT_THAT(statfs("/dev/shm", &st), SyscallSucceeds());
+
+  // This assumes that /dev/shm is tmpfs.
+  EXPECT_EQ(st.f_namelen, NAME_MAX);
+}
+
+TEST(FstatfsTest, CannotStatBadFd) {
+  struct statfs st;
+  EXPECT_THAT(fstatfs(-1, &st), SyscallFailsWithErrno(EBADF));
+}
+
+TEST(FstatfsTest, InternalTmpfs) {
+  auto temp_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
+  const FileDescriptor fd =
+      ASSERT_NO_ERRNO_AND_VALUE(Open(temp_file.path(), O_RDONLY));
+
+  struct statfs st;
+  EXPECT_THAT(fstatfs(fd.get(), &st), SyscallSucceeds());
+}
+
+TEST(FstatfsTest, InternalDevShm) {
+  auto temp_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
+  const FileDescriptor fd =
+      ASSERT_NO_ERRNO_AND_VALUE(Open("/dev/shm", O_RDONLY));
+
+  struct statfs st;
+  EXPECT_THAT(fstatfs(fd.get(), &st), SyscallSucceeds());
+}
+
+}  // namespace
+
+}  // namespace testing
+}  // namespace gvisor