// 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/socket.h> #include <sys/stat.h> #include <sys/types.h> #include <sys/un.h> #include "gtest/gtest.h" #include "test/util/capability_util.h" #include "test/util/temp_path.h" #include "test/util/test_util.h" namespace gvisor { namespace testing { namespace { TEST(FchdirTest, Success) { auto temp_dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir()); int fd; ASSERT_THAT(fd = open(temp_dir.path().c_str(), O_DIRECTORY | O_RDONLY), SyscallSucceeds()); EXPECT_THAT(fchdir(fd), SyscallSucceeds()); EXPECT_THAT(close(fd), SyscallSucceeds()); // Change CWD to a permanent location as temp dirs will be cleaned up. EXPECT_THAT(chdir("/"), SyscallSucceeds()); } TEST(FchdirTest, InvalidFD) { EXPECT_THAT(fchdir(-1), SyscallFailsWithErrno(EBADF)); } TEST(FchdirTest, PermissionDenied) { // Drop capabilities that allow us to override directory permissions. ASSERT_NO_ERRNO(SetCapability(CAP_DAC_OVERRIDE, false)); ASSERT_NO_ERRNO(SetCapability(CAP_DAC_READ_SEARCH, false)); auto temp_dir = ASSERT_NO_ERRNO_AND_VALUE( TempPath::CreateDirWith(GetAbsoluteTestTmpdir(), 0666 /* mode */)); int fd; ASSERT_THAT(fd = open(temp_dir.path().c_str(), O_DIRECTORY | O_RDONLY), SyscallSucceeds()); EXPECT_THAT(fchdir(fd), SyscallFailsWithErrno(EACCES)); EXPECT_THAT(close(fd), SyscallSucceeds()); } TEST(FchdirTest, NotDir) { auto temp_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile()); int fd; ASSERT_THAT(fd = open(temp_file.path().c_str(), O_CREAT | O_RDONLY, 0777), SyscallSucceeds()); EXPECT_THAT(fchdir(fd), SyscallFailsWithErrno(ENOTDIR)); EXPECT_THAT(close(fd), SyscallSucceeds()); } } // namespace } // namespace testing } // namespace gvisor