1//===-- Unittests for fchmod ----------------------------------------------===//
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/fcntl/open.h"
10#include "src/sys/stat/fchmod.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 LlvmLibcFchmodTest = LIBC_NAMESPACE::testing::ErrnoCheckingTest;
22
23TEST_F(LlvmLibcFchmodTest, ChangeAndOpen) {
24 // The test file is initially writable. We open it for writing and ensure
25 // that it indeed can be opened for writing. Next, we close the file and
26 // make it readonly using chmod. We test that chmod actually succeeded by
27 // trying to open the file for writing and failing.
28 constexpr const char *TEST_FILE = "testdata/fchmod.test";
29 const char WRITE_DATA[] = "test data";
30 constexpr ssize_t WRITE_SIZE = ssize_t(sizeof(WRITE_DATA));
31
32 int fd = LIBC_NAMESPACE::open(TEST_FILE, O_APPEND | O_WRONLY);
33 ASSERT_GT(fd, 0);
34 ASSERT_ERRNO_SUCCESS();
35 ASSERT_EQ(LIBC_NAMESPACE::write(fd, WRITE_DATA, sizeof(WRITE_DATA)),
36 WRITE_SIZE);
37 ASSERT_THAT(LIBC_NAMESPACE::close(fd), Succeeds(0));
38
39 fd = LIBC_NAMESPACE::open(TEST_FILE, O_APPEND | O_WRONLY);
40 ASSERT_GT(fd, 0);
41 ASSERT_ERRNO_SUCCESS();
42 EXPECT_THAT(LIBC_NAMESPACE::fchmod(fd, S_IRUSR), Succeeds(0));
43 ASSERT_THAT(LIBC_NAMESPACE::close(fd), Succeeds(0));
44
45 // Opening for writing should fail.
46 EXPECT_EQ(LIBC_NAMESPACE::open(TEST_FILE, O_APPEND | O_WRONLY), -1);
47 ASSERT_ERRNO_FAILURE();
48 // But opening for reading should succeed.
49 fd = LIBC_NAMESPACE::open(TEST_FILE, O_APPEND | O_RDONLY);
50 EXPECT_GT(fd, 0);
51 ASSERT_ERRNO_SUCCESS();
52
53 EXPECT_THAT(LIBC_NAMESPACE::fchmod(fd, S_IRWXU), Succeeds(0));
54 EXPECT_THAT(LIBC_NAMESPACE::close(fd), Succeeds(0));
55}
56
57TEST_F(LlvmLibcFchmodTest, NonExistentFile) {
58 ASSERT_EQ(LIBC_NAMESPACE::fchmod(-1, S_IRUSR), -1);
59 ASSERT_ERRNO_FAILURE();
60}
61

source code of libc/test/src/sys/stat/fchmod_test.cpp