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// Copyright 2017 The Bazel Authors. All rights reserved.
//
// 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 <stdlib.h>
#include <string.h>
#include <windows.h>
#include <memory> // unique_ptr
#include <sstream>
#include <string>
#include "gtest/gtest.h"
#include "src/main/native/windows/file.h"
#include "src/test/cpp/util/windows_test_util.h"
#if !defined(_WIN32) && !defined(__CYGWIN__)
#error("This test should only be run on Windows")
#endif // !defined(_WIN32) && !defined(__CYGWIN__)
namespace bazel {
namespace windows {
#define TOSTRING(x) #x
#define TOWSTRING1(x) L##x
#define TOWSTRING(x) TOWSTRING1(x)
#define WLINE TOWSTRING(TOSTRING(__LINE__))
using blaze_util::DeleteAllUnder;
using blaze_util::GetTestTmpDirW;
using std::unique_ptr;
using std::wstring;
static const wstring kUncPrefix = wstring(L"\\\\?\\");
class WindowsFileOperationsTest : public ::testing::Test {
public:
void TearDown() override { DeleteAllUnder(GetTestTmpDirW()); }
};
TEST_F(WindowsFileOperationsTest, TestCreateJunction) {
wstring tmp(kUncPrefix + GetTestTmpDirW());
wstring target(tmp + L"\\junc_target");
EXPECT_TRUE(::CreateDirectoryW(target.c_str(), NULL));
wstring file1(target + L"\\foo");
EXPECT_TRUE(blaze_util::CreateDummyFile(file1));
EXPECT_EQ(IS_JUNCTION_NO, IsJunctionOrDirectorySymlink(target.c_str()));
EXPECT_NE(INVALID_FILE_ATTRIBUTES, ::GetFileAttributesW(file1.c_str()));
wstring name(tmp + L"\\junc_name");
// Create junctions from all combinations of UNC-prefixed or non-prefixed name
// and target paths.
ASSERT_EQ(L"", CreateJunction(name + L"1", target));
ASSERT_EQ(L"", CreateJunction(name + L"2", target.substr(4)));
ASSERT_EQ(L"", CreateJunction(name.substr(4) + L"3", target));
ASSERT_EQ(L"", CreateJunction(name.substr(4) + L"4", target.substr(4)));
// Assert creation of the junctions.
ASSERT_EQ(IS_JUNCTION_YES,
IsJunctionOrDirectorySymlink((name + L"1").c_str()));
ASSERT_EQ(IS_JUNCTION_YES,
IsJunctionOrDirectorySymlink((name + L"2").c_str()));
ASSERT_EQ(IS_JUNCTION_YES,
IsJunctionOrDirectorySymlink((name + L"3").c_str()));
ASSERT_EQ(IS_JUNCTION_YES,
IsJunctionOrDirectorySymlink((name + L"4").c_str()));
// Assert that the file is visible under all junctions.
ASSERT_NE(INVALID_FILE_ATTRIBUTES,
::GetFileAttributesW((name + L"1\\foo").c_str()));
ASSERT_NE(INVALID_FILE_ATTRIBUTES,
::GetFileAttributesW((name + L"2\\foo").c_str()));
ASSERT_NE(INVALID_FILE_ATTRIBUTES,
::GetFileAttributesW((name + L"3\\foo").c_str()));
ASSERT_NE(INVALID_FILE_ATTRIBUTES,
::GetFileAttributesW((name + L"4\\foo").c_str()));
// Assert that no other file exists under the junctions.
wstring file2(target + L"\\bar");
ASSERT_EQ(INVALID_FILE_ATTRIBUTES, ::GetFileAttributesW(file2.c_str()));
ASSERT_EQ(INVALID_FILE_ATTRIBUTES,
::GetFileAttributesW((name + L"1\\bar").c_str()));
ASSERT_EQ(INVALID_FILE_ATTRIBUTES,
::GetFileAttributesW((name + L"2\\bar").c_str()));
ASSERT_EQ(INVALID_FILE_ATTRIBUTES,
::GetFileAttributesW((name + L"3\\bar").c_str()));
ASSERT_EQ(INVALID_FILE_ATTRIBUTES,
::GetFileAttributesW((name + L"4\\bar").c_str()));
// Create a new file.
EXPECT_TRUE(blaze_util::CreateDummyFile(file2));
EXPECT_NE(INVALID_FILE_ATTRIBUTES, ::GetFileAttributesW(file2.c_str()));
// Assert that the newly created file appears under all junctions.
ASSERT_NE(INVALID_FILE_ATTRIBUTES,
::GetFileAttributesW((name + L"1\\bar").c_str()));
ASSERT_NE(INVALID_FILE_ATTRIBUTES,
::GetFileAttributesW((name + L"2\\bar").c_str()));
ASSERT_NE(INVALID_FILE_ATTRIBUTES,
::GetFileAttributesW((name + L"3\\bar").c_str()));
ASSERT_NE(INVALID_FILE_ATTRIBUTES,
::GetFileAttributesW((name + L"4\\bar").c_str()));
}
TEST_F(WindowsFileOperationsTest, TestCanDeleteExistingFile) {
wstring tmp(kUncPrefix + GetTestTmpDirW());
wstring path = tmp + L"\\file" WLINE;
EXPECT_TRUE(blaze_util::CreateDummyFile(path));
ASSERT_EQ(DeletePath(path.c_str(), nullptr), DELETE_PATH_SUCCESS);
}
TEST_F(WindowsFileOperationsTest, TestCanDeleteExistingDirectory) {
wstring tmp(kUncPrefix + GetTestTmpDirW());
wstring path = tmp + L"\\dir" WLINE;
EXPECT_TRUE(CreateDirectoryW(path.c_str(), NULL));
ASSERT_EQ(DeletePath(path.c_str(), nullptr), DELETE_PATH_SUCCESS);
}
TEST_F(WindowsFileOperationsTest, TestCanDeleteExistingJunction) {
wstring tmp(kUncPrefix + GetTestTmpDirW());
wstring name = tmp + L"\\junc" WLINE;
wstring target = tmp + L"\\target" WLINE;
EXPECT_TRUE(CreateDirectoryW(target.c_str(), NULL));
EXPECT_EQ(L"", CreateJunction(name, target));
ASSERT_EQ(DeletePath(name.c_str(), nullptr), DELETE_PATH_SUCCESS);
}
TEST_F(WindowsFileOperationsTest, TestCanDeleteExistingJunctionWithoutTarget) {
wstring tmp(kUncPrefix + GetTestTmpDirW());
wstring name = tmp + L"\\junc" WLINE;
wstring target = tmp + L"\\target" WLINE;
EXPECT_TRUE(CreateDirectoryW(target.c_str(), NULL));
EXPECT_EQ(L"", CreateJunction(name, target));
EXPECT_TRUE(RemoveDirectoryW(target.c_str()));
// The junction still exists, its target does not.
EXPECT_NE(GetFileAttributesW(name.c_str()), INVALID_FILE_ATTRIBUTES);
EXPECT_EQ(GetFileAttributesW(target.c_str()), INVALID_FILE_ATTRIBUTES);
// We can delete the dangling junction.
ASSERT_EQ(DeletePath(name.c_str(), nullptr), DELETE_PATH_SUCCESS);
}
TEST_F(WindowsFileOperationsTest, TestCannotDeleteNonExistentPath) {
wstring tmp(kUncPrefix + GetTestTmpDirW());
wstring path = tmp + L"\\dummy" WLINE;
EXPECT_EQ(GetFileAttributesW(path.c_str()), INVALID_FILE_ATTRIBUTES);
ASSERT_EQ(DeletePath(path.c_str(), nullptr), DELETE_PATH_DOES_NOT_EXIST);
}
TEST_F(WindowsFileOperationsTest, TestCannotDeletePathWhereParentIsFile) {
wstring tmp(kUncPrefix + GetTestTmpDirW());
wstring parent = tmp + L"\\file" WLINE;
wstring child = parent + L"\\file" WLINE;
EXPECT_TRUE(blaze_util::CreateDummyFile(parent));
ASSERT_EQ(DeletePath(child.c_str(), nullptr), DELETE_PATH_DOES_NOT_EXIST);
}
TEST_F(WindowsFileOperationsTest, TestCannotDeleteNonEmptyDirectory) {
wstring tmp(kUncPrefix + GetTestTmpDirW());
wstring parent = tmp + L"\\dir" WLINE;
wstring child = parent + L"\\file" WLINE;
EXPECT_TRUE(CreateDirectoryW(parent.c_str(), NULL));
EXPECT_TRUE(blaze_util::CreateDummyFile(child));
ASSERT_EQ(DeletePath(parent.c_str(), nullptr),
DELETE_PATH_DIRECTORY_NOT_EMPTY);
}
TEST_F(WindowsFileOperationsTest, TestCannotDeleteBusyFile) {
wstring tmp(kUncPrefix + GetTestTmpDirW());
wstring path = tmp + L"\\file" WLINE;
EXPECT_TRUE(blaze_util::CreateDummyFile(path));
HANDLE h = CreateFileW(path.c_str(), GENERIC_WRITE, 0, NULL, OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL, NULL);
EXPECT_NE(h, INVALID_HANDLE_VALUE);
int actual = DeletePath(path.c_str(), nullptr);
CloseHandle(h);
ASSERT_EQ(actual, DELETE_PATH_ACCESS_DENIED);
}
TEST_F(WindowsFileOperationsTest, TestCannotDeleteBusyDirectory) {
wstring tmp(kUncPrefix + GetTestTmpDirW());
wstring path = tmp + L"\\dir" WLINE;
EXPECT_TRUE(CreateDirectoryW(path.c_str(), NULL));
HANDLE h = CreateFileW(path.c_str(), GENERIC_WRITE, 0, NULL, OPEN_EXISTING,
FILE_FLAG_BACKUP_SEMANTICS, NULL);
EXPECT_NE(h, INVALID_HANDLE_VALUE);
int actual = DeletePath(path.c_str(), nullptr);
CloseHandle(h);
ASSERT_EQ(actual, DELETE_PATH_ACCESS_DENIED);
}
TEST_F(WindowsFileOperationsTest, TestCannotDeleteBusyJunction) {
wstring tmp(kUncPrefix + GetTestTmpDirW());
wstring name = tmp + L"\\junc" WLINE;
wstring target = tmp + L"\\target" WLINE;
EXPECT_TRUE(CreateDirectoryW(target.c_str(), NULL));
EXPECT_EQ(L"", CreateJunction(name, target));
// Open the junction itself (do not follow symlinks).
HANDLE h = CreateFileW(
name.c_str(), GENERIC_WRITE, 0, NULL, OPEN_EXISTING,
FILE_FLAG_BACKUP_SEMANTICS | FILE_FLAG_OPEN_REPARSE_POINT, NULL);
EXPECT_NE(h, INVALID_HANDLE_VALUE);
int actual = DeletePath(name.c_str(), nullptr);
CloseHandle(h);
ASSERT_EQ(actual, DELETE_PATH_ACCESS_DENIED);
}
TEST_F(WindowsFileOperationsTest, TestCanDeleteJunctionWhoseTargetIsBusy) {
wstring tmp(kUncPrefix + GetTestTmpDirW());
wstring name = tmp + L"\\junc" WLINE;
wstring target = tmp + L"\\target" WLINE;
EXPECT_TRUE(CreateDirectoryW(target.c_str(), NULL));
EXPECT_EQ(L"", CreateJunction(name, target));
// Open the junction's target (follow symlinks).
HANDLE h = CreateFileW(target.c_str(), GENERIC_WRITE, 0, NULL, OPEN_EXISTING,
FILE_FLAG_BACKUP_SEMANTICS, NULL);
EXPECT_NE(h, INVALID_HANDLE_VALUE);
int actual = DeletePath(name.c_str(), nullptr);
CloseHandle(h);
ASSERT_EQ(actual, DELETE_PATH_SUCCESS);
}
#undef TOSTRING
#undef TOWSTRING1
#undef TOWSTRING
#undef WLINE
} // namespace windows
} // namespace bazel
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