1 files changed, 96 insertions, 0 deletions
diff --git a/test/syscalls/linux/mkdir.cc b/test/syscalls/linux/mkdir.cc
new file mode 100644
index 000000000..84db45eb3
--- /dev/null
+++ b/test/syscalls/linux/mkdir.cc
@@ -0,0 +1,96 @@
+// 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 <fcntl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include "gtest/gtest.h"
+#include "test/syscalls/linux/temp_umask.h"
+#include "test/util/capability_util.h"
+#include "test/util/fs_util.h"
+#include "test/util/temp_path.h"
+#include "test/util/test_util.h"
+
+namespace gvisor {
+namespace testing {
+
+namespace {
+
+class MkdirTest : public ::testing::Test {
+ protected:
+  // SetUp creates various configurations of files.
+  void SetUp() override { dirname_ = NewTempAbsPath(); }
+
+  // TearDown unlinks created files.
+  void TearDown() override {
+    // FIXME: We don't currently implement rmdir.
+    // We do this unconditionally because there's no harm in trying.
+    rmdir(dirname_.c_str());
+  }
+
+  std::string dirname_;
+};
+
+TEST_F(MkdirTest, DISABLED_CanCreateReadbleDir) {
+  ASSERT_THAT(mkdir(dirname_.c_str(), 0444), SyscallSucceeds());
+  ASSERT_THAT(
+      open(JoinPath(dirname_, "anything").c_str(), O_RDWR | O_CREAT, 0666),
+      SyscallFailsWithErrno(EACCES));
+}
+
+TEST_F(MkdirTest, CanCreateWritableDir) {
+  ASSERT_THAT(mkdir(dirname_.c_str(), 0777), SyscallSucceeds());
+  std::string filename = JoinPath(dirname_, "anything");
+  int fd;
+  ASSERT_THAT(fd = open(filename.c_str(), O_RDWR | O_CREAT, 0666),
+              SyscallSucceeds());
+  EXPECT_THAT(close(fd), SyscallSucceeds());
+  ASSERT_THAT(unlink(filename.c_str()), SyscallSucceeds());
+}
+
+TEST_F(MkdirTest, HonorsUmask) {
+  constexpr mode_t kMask = 0111;
+  TempUmask mask(kMask);
+  ASSERT_THAT(mkdir(dirname_.c_str(), 0777), SyscallSucceeds());
+  struct stat statbuf;
+  ASSERT_THAT(stat(dirname_.c_str(), &statbuf), SyscallSucceeds());
+  EXPECT_EQ(0777 & ~kMask, statbuf.st_mode & 0777);
+}
+
+TEST_F(MkdirTest, HonorsUmask2) {
+  constexpr mode_t kMask = 0142;
+  TempUmask mask(kMask);
+  ASSERT_THAT(mkdir(dirname_.c_str(), 0777), SyscallSucceeds());
+  struct stat statbuf;
+  ASSERT_THAT(stat(dirname_.c_str(), &statbuf), SyscallSucceeds());
+  EXPECT_EQ(0777 & ~kMask, statbuf.st_mode & 0777);
+}
+
+TEST_F(MkdirTest, FailsOnDirWithoutWritePerms) {
+  // Drop capabilities that allow us to override file and directory permissions.
+  ASSERT_NO_ERRNO(SetCapability(CAP_DAC_OVERRIDE, false));
+  ASSERT_NO_ERRNO(SetCapability(CAP_DAC_READ_SEARCH, false));
+
+  auto parent = ASSERT_NO_ERRNO_AND_VALUE(
+      TempPath::CreateDirWith(GetAbsoluteTestTmpdir(), 0555));
+  auto dir = JoinPath(parent.path(), "foo");
+  ASSERT_THAT(mkdir(dir.c_str(), 0777), SyscallFailsWithErrno(EACCES));
+}
+
+}  // namespace
+
+}  // namespace testing
+}  // namespace gvisor