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//===-- Unittests for chmod -----------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "src/errno/libc_errno.h"
#include "src/fcntl/open.h"
#include "src/sys/stat/chmod.h"
#include "src/unistd/close.h"
#include "src/unistd/write.h"
#include "test/ErrnoSetterMatcher.h"
#include "test/UnitTest/Test.h"
#include <fcntl.h>
#include <sys/stat.h>
TEST(LlvmLibcChmodTest, ChangeAndOpen) {
using __llvm_libc::testing::ErrnoSetterMatcher::Fails;
using __llvm_libc::testing::ErrnoSetterMatcher::Succeeds;
// The test file is initially writable. We open it for writing and ensure
// that it indeed can be opened for writing. Next, we close the file and
// make it readonly using chmod. We test that chmod actually succeeded by
// trying to open the file for writing and failing.
constexpr const char *TEST_FILE = "testdata/chmod.test";
const char WRITE_DATA[] = "test data";
constexpr ssize_t WRITE_SIZE = ssize_t(sizeof(WRITE_DATA));
libc_errno = 0;
int fd = __llvm_libc::open(TEST_FILE, O_APPEND | O_WRONLY);
ASSERT_GT(fd, 0);
ASSERT_EQ(libc_errno, 0);
ASSERT_EQ(__llvm_libc::write(fd, WRITE_DATA, sizeof(WRITE_DATA)), WRITE_SIZE);
ASSERT_THAT(__llvm_libc::close(fd), Succeeds(0));
fd = __llvm_libc::open(TEST_FILE, O_PATH);
ASSERT_GT(fd, 0);
ASSERT_EQ(libc_errno, 0);
ASSERT_THAT(__llvm_libc::close(fd), Succeeds(0));
EXPECT_THAT(__llvm_libc::chmod(TEST_FILE, S_IRUSR), Succeeds(0));
// Opening for writing should fail.
EXPECT_EQ(__llvm_libc::open(TEST_FILE, O_APPEND | O_WRONLY), -1);
EXPECT_NE(libc_errno, 0);
libc_errno = 0;
// But opening for reading should succeed.
fd = __llvm_libc::open(TEST_FILE, O_APPEND | O_RDONLY);
EXPECT_GT(fd, 0);
EXPECT_EQ(libc_errno, 0);
EXPECT_THAT(__llvm_libc::close(fd), Succeeds(0));
EXPECT_THAT(__llvm_libc::chmod(TEST_FILE, S_IRWXU), Succeeds(0));
}
TEST(LlvmLibcChmodTest, NonExistentFile) {
libc_errno = 0;
using __llvm_libc::testing::ErrnoSetterMatcher::Fails;
ASSERT_THAT(__llvm_libc::chmod("non-existent-file", S_IRUSR), Fails(ENOENT));
libc_errno = 0;
}
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