68 lines · cpp
1//===-- Unittests for fchmodat --------------------------------------------===//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-exception6//7//===----------------------------------------------------------------------===//8 9#include "src/fcntl/open.h"10#include "src/sys/stat/fchmodat.h"11#include "src/unistd/close.h"12#include "src/unistd/write.h"13#include "test/UnitTest/ErrnoCheckingTest.h"14#include "test/UnitTest/ErrnoSetterMatcher.h"15#include "test/UnitTest/Test.h"16 17#include "hdr/fcntl_macros.h"18#include <sys/stat.h>19 20using namespace LIBC_NAMESPACE::testing::ErrnoSetterMatcher;21using LlvmLibcFchmodatTest = LIBC_NAMESPACE::testing::ErrnoCheckingTest;22 23TEST_F(LlvmLibcFchmodatTest, ChangeAndOpen) {24 // The test file is initially writable. We open it for writing and ensure25 // that it indeed can be opened for writing. Next, we close the file and26 // make it readonly using chmod. We test that chmod actually succeeded by27 // trying to open the file for writing and failing.28 constexpr const char *TEST_FILE = "testdata/fchmodat.test";29 constexpr const char *TEST_DIR = "testdata";30 constexpr const char *TEST_FILE_BASENAME = "fchmodat.test";31 const char WRITE_DATA[] = "fchmodat test";32 constexpr ssize_t WRITE_SIZE = ssize_t(sizeof(WRITE_DATA));33 34 int fd = LIBC_NAMESPACE::open(TEST_FILE, O_CREAT | O_WRONLY, S_IRWXU);35 ASSERT_GT(fd, 0);36 ASSERT_ERRNO_SUCCESS();37 ASSERT_EQ(LIBC_NAMESPACE::write(fd, WRITE_DATA, sizeof(WRITE_DATA)),38 WRITE_SIZE);39 ASSERT_THAT(LIBC_NAMESPACE::close(fd), Succeeds(0));40 41 int dirfd = LIBC_NAMESPACE::open(TEST_DIR, O_DIRECTORY);42 ASSERT_GT(dirfd, 0);43 ASSERT_ERRNO_SUCCESS();44 45 EXPECT_THAT(LIBC_NAMESPACE::fchmodat(dirfd, TEST_FILE_BASENAME, S_IRUSR, 0),46 Succeeds(0));47 48 // Opening for writing should fail.49 EXPECT_EQ(LIBC_NAMESPACE::open(TEST_FILE, O_APPEND | O_WRONLY), -1);50 ASSERT_ERRNO_FAILURE();51 // But opening for reading should succeed.52 fd = LIBC_NAMESPACE::open(TEST_FILE, O_APPEND | O_RDONLY);53 EXPECT_GT(fd, 0);54 ASSERT_ERRNO_SUCCESS();55 56 EXPECT_THAT(LIBC_NAMESPACE::close(fd), Succeeds(0));57 EXPECT_THAT(LIBC_NAMESPACE::fchmodat(dirfd, TEST_FILE_BASENAME, S_IRWXU, 0),58 Succeeds(0));59 60 EXPECT_THAT(LIBC_NAMESPACE::close(dirfd), Succeeds(0));61}62 63TEST_F(LlvmLibcFchmodatTest, NonExistentFile) {64 ASSERT_THAT(65 LIBC_NAMESPACE::fchmodat(AT_FDCWD, "non-existent-file", S_IRUSR, 0),66 Fails(ENOENT));67}68