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//===-- Unittest for fcntl ------------------------------------------------===//
//
// 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 "hdr/fcntl_macros.h"
#include "hdr/stdio_macros.h"
#include "hdr/types/struct_flock.h"
#include "src/fcntl/fcntl.h"
#include "src/fcntl/open.h"
#include "src/unistd/close.h"
#include "src/unistd/getpid.h"
#include "test/UnitTest/ErrnoCheckingTest.h"
#include "test/UnitTest/ErrnoSetterMatcher.h"
#include "test/UnitTest/Test.h"
#include <sys/stat.h> // For S_IRWXU
using LlvmLibcFcntlTest = LIBC_NAMESPACE::testing::ErrnoCheckingTest;
TEST_F(LlvmLibcFcntlTest, FcntlDupfd) {
using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds;
constexpr const char *TEST_FILE_NAME = "testdata/fcntl_dup.test";
auto TEST_FILE = libc_make_test_file_path(TEST_FILE_NAME);
int fd2, fd3;
int fd = LIBC_NAMESPACE::open(TEST_FILE, O_CREAT | O_TRUNC, S_IRWXU);
ASSERT_ERRNO_SUCCESS();
ASSERT_GT(fd, 0);
fd2 = LIBC_NAMESPACE::fcntl(fd, F_DUPFD, 0);
ASSERT_ERRNO_SUCCESS();
ASSERT_GT(fd2, 0);
fd3 = LIBC_NAMESPACE::fcntl(fd, F_DUPFD, 10);
ASSERT_ERRNO_SUCCESS();
ASSERT_GT(fd3, 0);
ASSERT_THAT(LIBC_NAMESPACE::close(fd), Succeeds(0));
ASSERT_THAT(LIBC_NAMESPACE::close(fd2), Succeeds(0));
ASSERT_THAT(LIBC_NAMESPACE::close(fd3), Succeeds(0));
}
TEST_F(LlvmLibcFcntlTest, FcntlGetFl) {
using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds;
constexpr const char *TEST_FILE_NAME = "testdata/fcntl_getfl.test";
auto TEST_FILE = libc_make_test_file_path(TEST_FILE_NAME);
int retVal;
int fd = LIBC_NAMESPACE::open(TEST_FILE, O_CREAT | O_TRUNC, S_IRWXU);
ASSERT_ERRNO_SUCCESS();
ASSERT_GT(fd, 0);
retVal = LIBC_NAMESPACE::fcntl(fd, F_GETFL);
ASSERT_ERRNO_SUCCESS();
ASSERT_GT(retVal, -1);
ASSERT_THAT(LIBC_NAMESPACE::close(fd), Succeeds(0));
}
TEST_F(LlvmLibcFcntlTest, FcntlSetFl) {
using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds;
constexpr const char *TEST_FILE_NAME = "testdata/fcntl_setfl.test";
auto TEST_FILE = libc_make_test_file_path(TEST_FILE_NAME);
int retVal;
int fd = LIBC_NAMESPACE::open(TEST_FILE, O_CREAT | O_TRUNC | O_RDWR, S_IRWXU);
ASSERT_ERRNO_SUCCESS();
ASSERT_GT(fd, 0);
retVal = LIBC_NAMESPACE::fcntl(fd, F_GETFL);
ASSERT_ERRNO_SUCCESS();
ASSERT_GT(retVal, -1);
int oldFlags = LIBC_NAMESPACE::fcntl(fd, F_GETFL, 0);
ASSERT_ERRNO_SUCCESS();
ASSERT_GT(oldFlags, 0);
// Add the APPEND flag;
oldFlags |= O_APPEND;
retVal = LIBC_NAMESPACE::fcntl(fd, F_SETFL, oldFlags);
ASSERT_ERRNO_SUCCESS();
ASSERT_GT(retVal, -1);
// Remove the APPEND flag;
oldFlags = -oldFlags & O_APPEND;
retVal = LIBC_NAMESPACE::fcntl(fd, F_SETFL, oldFlags);
ASSERT_ERRNO_SUCCESS();
ASSERT_GT(retVal, -1);
ASSERT_THAT(LIBC_NAMESPACE::close(fd), Succeeds(0));
}
/* Tests that are common between OFD and traditional variants of fcntl locks. */
template <int GETLK_CMD, int SETLK_CMD>
class LibcFcntlCommonLockTests : public LlvmLibcFcntlTest {
public:
void GetLkRead() {
using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds;
constexpr const char *TEST_FILE_NAME = "testdata/fcntl_getlkread.test";
const auto TEST_FILE = libc_make_test_file_path(TEST_FILE_NAME);
struct flock flk = {};
struct flock svflk = {};
int retVal;
int fd =
LIBC_NAMESPACE::open(TEST_FILE, O_CREAT | O_TRUNC | O_RDONLY, S_IRWXU);
ASSERT_ERRNO_SUCCESS();
ASSERT_GT(fd, 0);
flk.l_type = F_RDLCK;
flk.l_start = 0;
flk.l_whence = SEEK_SET;
flk.l_len = 50;
// copy flk into svflk
svflk = flk;
retVal = LIBC_NAMESPACE::fcntl(fd, GETLK_CMD, &svflk);
ASSERT_ERRNO_SUCCESS();
ASSERT_GT(retVal, -1);
ASSERT_NE((int)svflk.l_type, F_WRLCK); // File should not be write locked.
retVal = LIBC_NAMESPACE::fcntl(fd, SETLK_CMD, &svflk);
ASSERT_ERRNO_SUCCESS();
ASSERT_GT(retVal, -1);
ASSERT_THAT(LIBC_NAMESPACE::close(fd), Succeeds(0));
}
void GetLkWrite() {
using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds;
constexpr const char *TEST_FILE_NAME = "testdata/fcntl_getlkwrite.test";
const auto TEST_FILE = libc_make_test_file_path(TEST_FILE_NAME);
struct flock flk = {};
struct flock svflk = {};
int retVal;
int fd =
LIBC_NAMESPACE::open(TEST_FILE, O_CREAT | O_TRUNC | O_RDWR, S_IRWXU);
ASSERT_ERRNO_SUCCESS();
ASSERT_GT(fd, 0);
flk.l_type = F_WRLCK;
flk.l_start = 0;
flk.l_whence = SEEK_SET;
flk.l_len = 0;
// copy flk into svflk
svflk = flk;
retVal = LIBC_NAMESPACE::fcntl(fd, GETLK_CMD, &svflk);
ASSERT_ERRNO_SUCCESS();
ASSERT_GT(retVal, -1);
ASSERT_NE((int)svflk.l_type, F_RDLCK); // File should not be read locked.
retVal = LIBC_NAMESPACE::fcntl(fd, SETLK_CMD, &svflk);
ASSERT_ERRNO_SUCCESS();
ASSERT_GT(retVal, -1);
ASSERT_THAT(LIBC_NAMESPACE::close(fd), Succeeds(0));
}
void UseAfterClose() {
using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds;
constexpr const char *TEST_FILE_NAME =
"testdata/fcntl_use_after_close.test";
const auto TEST_FILE = libc_make_test_file_path(TEST_FILE_NAME);
int fd =
LIBC_NAMESPACE::open(TEST_FILE, O_CREAT | O_TRUNC | O_RDWR, S_IRWXU);
ASSERT_THAT(LIBC_NAMESPACE::close(fd), Succeeds(0));
flock flk = {};
flk.l_type = F_RDLCK;
flk.l_start = 0;
flk.l_whence = SEEK_SET;
flk.l_len = 50;
ASSERT_EQ(-1, LIBC_NAMESPACE::fcntl(fd, GETLK_CMD, &flk));
ASSERT_ERRNO_EQ(EBADF);
}
};
#define COMMON_LOCK_TESTS(NAME, GETLK_CMD, SETLK_CMD) \
using NAME = LibcFcntlCommonLockTests<GETLK_CMD, SETLK_CMD>; \
TEST_F(NAME, GetLkRead) { GetLkRead(); } \
TEST_F(NAME, GetLkWrite) { GetLkWrite(); } \
TEST_F(NAME, UseAfterClose) { UseAfterClose(); } \
static_assert(true, "Require semicolon.")
COMMON_LOCK_TESTS(LlvmLibcFcntlProcessAssociatedLockTest, F_GETLK, F_SETLK);
COMMON_LOCK_TESTS(LlvmLibcFcntlOpenFileDescriptionLockTest, F_OFD_GETLK,
F_OFD_SETLK);
TEST_F(LlvmLibcFcntlTest, UseAfterClose) {
using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds;
constexpr const char *TEST_FILE_NAME = "testdata/fcntl_use_after_close.test";
auto TEST_FILE = libc_make_test_file_path(TEST_FILE_NAME);
int fd = LIBC_NAMESPACE::open(TEST_FILE, O_CREAT | O_TRUNC | O_RDWR, S_IRWXU);
ASSERT_THAT(LIBC_NAMESPACE::close(fd), Succeeds(0));
ASSERT_EQ(-1, LIBC_NAMESPACE::fcntl(fd, F_GETFL));
ASSERT_ERRNO_EQ(EBADF);
}
TEST_F(LlvmLibcFcntlTest, SetGetOwnerTest) {
using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds;
pid_t pid = LIBC_NAMESPACE::getpid();
ASSERT_GT(pid, -1);
constexpr const char *TEST_FILE_NAME = "testdata/fcntl_set_get_owner.test";
auto TEST_FILE = libc_make_test_file_path(TEST_FILE_NAME);
int fd = LIBC_NAMESPACE::open(TEST_FILE, O_CREAT | O_TRUNC | O_RDWR, S_IRWXU);
ASSERT_ERRNO_SUCCESS();
ASSERT_GT(fd, 0);
int ret = LIBC_NAMESPACE::fcntl(fd, F_SETOWN, pid);
ASSERT_ERRNO_SUCCESS();
ASSERT_GT(ret, -1);
int ret2 = LIBC_NAMESPACE::fcntl(fd, F_GETOWN);
ASSERT_ERRNO_SUCCESS();
ASSERT_EQ(ret2, pid);
ASSERT_THAT(LIBC_NAMESPACE::close(fd), Succeeds(0));
}
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