1 //===-- Unittests for fchdir ----------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "src/errno/libc_errno.h" 10 #include "src/fcntl/open.h" 11 #include "src/unistd/close.h" 12 #include "src/unistd/fchdir.h" 13 #include "test/ErrnoSetterMatcher.h" 14 #include "test/UnitTest/Test.h" 15 #include "utils/testutils/FDReader.h" 16 17 #include <fcntl.h> 18 19 TEST(LlvmLibcChdirTest, ChangeAndOpen) { 20 // The idea of this test is that we will first open an existing test file 21 // without changing the directory to make sure it exists. Next, we change 22 // directory and open the same file to make sure that the "fchdir" operation 23 // succeeded. 24 using __llvm_libc::testing::ErrnoSetterMatcher::Succeeds; 25 constexpr const char *TEST_DIR = "testdata"; 26 constexpr const char *TEST_FILE = "testdata/fchdir.test"; 27 constexpr const char *TEST_FILE_BASE = "fchdir.test"; 28 libc_errno = 0; 29 30 int dir_fd = __llvm_libc::open(TEST_DIR, O_DIRECTORY); 31 ASSERT_GT(dir_fd, 0); 32 ASSERT_EQ(libc_errno, 0); 33 int file_fd = __llvm_libc::open(TEST_FILE, O_PATH); 34 ASSERT_GT(file_fd, 0); 35 ASSERT_EQ(libc_errno, 0); 36 ASSERT_THAT(__llvm_libc::close(file_fd), Succeeds(0)); 37 38 ASSERT_THAT(__llvm_libc::fchdir(dir_fd), Succeeds(0)); 39 file_fd = __llvm_libc::open(TEST_FILE_BASE, O_PATH); 40 ASSERT_GT(file_fd, 0); 41 ASSERT_EQ(libc_errno, 0); 42 ASSERT_THAT(__llvm_libc::close(file_fd), Succeeds(0)); 43 ASSERT_THAT(__llvm_libc::close(dir_fd), Succeeds(0)); 44 } 45 46 TEST(LlvmLibcChdirTest, ChangeToNonExistentDir) { 47 using __llvm_libc::testing::ErrnoSetterMatcher::Fails; 48 libc_errno = 0; 49 ASSERT_EQ(__llvm_libc::fchdir(0), -1); 50 ASSERT_NE(libc_errno, 0); 51 libc_errno = 0; 52 } 53