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//===-- Unittests for faccessat -------------------------------------------===//
//
// 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/fcntl/open.h"
#include "src/unistd/close.h"
#include "src/unistd/faccessat.h"
#include "src/unistd/unlink.h"
#include "test/UnitTest/ErrnoCheckingTest.h"
#include "test/UnitTest/ErrnoSetterMatcher.h"
#include "test/UnitTest/Test.h"
#include <fcntl.h>
#include <sys/stat.h>
#include <unistd.h>
namespace {
using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Fails;
using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds;
using LlvmLibcFaccessatTest = LIBC_NAMESPACE::testing::ErrnoCheckingTest;
TEST_F(LlvmLibcFaccessatTest, WithAtFdcwd) {
// Test access checks on a file with AT_FDCWD and no flags, equivalent to
// access().
constexpr const char *FILENAME = "faccessat_basic.test";
auto TEST_FILE = libc_make_test_file_path(FILENAME);
// Check permissions on a file with full permissions
int fd = LIBC_NAMESPACE::open(TEST_FILE, O_WRONLY | O_CREAT, S_IRWXU);
ASSERT_ERRNO_SUCCESS();
ASSERT_GT(fd, 0);
ASSERT_THAT(LIBC_NAMESPACE::close(fd), Succeeds(0));
ASSERT_THAT(LIBC_NAMESPACE::faccessat(AT_FDCWD, TEST_FILE, F_OK, 0),
Succeeds(0));
ASSERT_THAT(
LIBC_NAMESPACE::faccessat(AT_FDCWD, TEST_FILE, X_OK | W_OK | R_OK, 0),
Succeeds(0));
ASSERT_THAT(LIBC_NAMESPACE::unlink(TEST_FILE), Succeeds(0));
// Check permissions on a file with execute-only permission
fd = LIBC_NAMESPACE::open(TEST_FILE, O_WRONLY | O_CREAT, S_IXUSR);
ASSERT_ERRNO_SUCCESS();
ASSERT_GT(fd, 0);
ASSERT_THAT(LIBC_NAMESPACE::close(fd), Succeeds(0));
ASSERT_THAT(LIBC_NAMESPACE::faccessat(AT_FDCWD, TEST_FILE, F_OK, 0),
Succeeds(0));
ASSERT_THAT(LIBC_NAMESPACE::faccessat(AT_FDCWD, TEST_FILE, X_OK, 0),
Succeeds(0));
ASSERT_THAT(LIBC_NAMESPACE::faccessat(AT_FDCWD, TEST_FILE, R_OK, 0),
Fails(EACCES));
ASSERT_THAT(LIBC_NAMESPACE::faccessat(AT_FDCWD, TEST_FILE, W_OK, 0),
Fails(EACCES));
ASSERT_THAT(LIBC_NAMESPACE::unlink(TEST_FILE), Succeeds(0));
}
TEST_F(LlvmLibcFaccessatTest, NonExistentFile) {
ASSERT_THAT(LIBC_NAMESPACE::faccessat(AT_FDCWD, "faccessat_nonexistent.test",
F_OK, 0),
Fails(ENOENT));
}
TEST_F(LlvmLibcFaccessatTest, AtEaccess) {
// With AT_EACCESS, faccessat checks permissions using the effective user ID,
// but the effective and real user ID will be the same here and changing that
// is not feasible in a test, so this is just a basic sanity check.
constexpr const char *FILENAME = "faccessat_eaccess.test";
auto TEST_FILE = libc_make_test_file_path(FILENAME);
int fd = LIBC_NAMESPACE::open(TEST_FILE, O_WRONLY | O_CREAT, S_IRWXU);
ASSERT_ERRNO_SUCCESS();
ASSERT_GT(fd, 0);
ASSERT_THAT(LIBC_NAMESPACE::close(fd), Succeeds(0));
ASSERT_THAT(LIBC_NAMESPACE::faccessat(AT_FDCWD, TEST_FILE, X_OK | W_OK | R_OK,
AT_EACCESS),
Succeeds(0));
ASSERT_THAT(LIBC_NAMESPACE::unlink(TEST_FILE), Succeeds(0));
}
TEST_F(LlvmLibcFaccessatTest, AtEmptyPath) {
constexpr const char *FILENAME = "faccessat_atemptypath.test";
auto TEST_FILE = libc_make_test_file_path(FILENAME);
int fd = LIBC_NAMESPACE::open(TEST_FILE, O_WRONLY | O_CREAT, S_IRWXU);
ASSERT_ERRNO_SUCCESS();
ASSERT_GT(fd, 0);
// Check permissions on the file referred to by fd
ASSERT_THAT(LIBC_NAMESPACE::faccessat(fd, "", F_OK, AT_EMPTY_PATH),
Succeeds(0));
ASSERT_THAT(
LIBC_NAMESPACE::faccessat(fd, "", X_OK | W_OK | R_OK, AT_EMPTY_PATH),
Succeeds(0));
ASSERT_THAT(LIBC_NAMESPACE::close(fd), Succeeds(0));
ASSERT_THAT(LIBC_NAMESPACE::unlink(TEST_FILE), Succeeds(0));
// Check permissions on the current working directory
ASSERT_THAT(LIBC_NAMESPACE::faccessat(AT_FDCWD, "", F_OK, AT_EMPTY_PATH),
Succeeds(0));
ASSERT_THAT(LIBC_NAMESPACE::faccessat(AT_FDCWD, "", X_OK | W_OK | R_OK,
AT_EMPTY_PATH),
Succeeds(0));
}
} // namespace
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