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 16 #include <fcntl.h> 17 18 TEST(LlvmLibcChdirTest, ChangeAndOpen) { 19 // The idea of this test is that we will first open an existing test file 20 // without changing the directory to make sure it exists. Next, we change 21 // directory and open the same file to make sure that the "fchdir" operation 22 // succeeded. 23 using __llvm_libc::testing::ErrnoSetterMatcher::Succeeds; 24 constexpr const char *TEST_DIR = "testdata"; 25 constexpr const char *TEST_FILE = "testdata/fchdir.test"; 26 constexpr const char *TEST_FILE_BASE = "fchdir.test"; 27 libc_errno = 0; 28 29 int dir_fd = __llvm_libc::open(TEST_DIR, O_DIRECTORY); 30 ASSERT_GT(dir_fd, 0); 31 ASSERT_EQ(libc_errno, 0); 32 int file_fd = __llvm_libc::open(TEST_FILE, O_PATH); 33 ASSERT_GT(file_fd, 0); 34 ASSERT_EQ(libc_errno, 0); 35 ASSERT_THAT(__llvm_libc::close(file_fd), Succeeds(0)); 36 37 ASSERT_THAT(__llvm_libc::fchdir(dir_fd), Succeeds(0)); 38 file_fd = __llvm_libc::open(TEST_FILE_BASE, O_PATH); 39 ASSERT_GT(file_fd, 0); 40 ASSERT_EQ(libc_errno, 0); 41 ASSERT_THAT(__llvm_libc::close(file_fd), Succeeds(0)); 42 ASSERT_THAT(__llvm_libc::close(dir_fd), Succeeds(0)); 43 } 44 45 TEST(LlvmLibcChdirTest, ChangeToNonExistentDir) { 46 using __llvm_libc::testing::ErrnoSetterMatcher::Fails; 47 libc_errno = 0; 48 ASSERT_EQ(__llvm_libc::fchdir(0), -1); 49 ASSERT_NE(libc_errno, 0); 50 libc_errno = 0; 51 } 52