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//===-- Unittests for ioctl -----------------------------------------------===//
//
// 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/sys/ioctl/ioctl.h"
#include "src/unistd/close.h"
#include "src/unistd/read.h"
#include "src/unistd/write.h"
#include "test/UnitTest/ErrnoCheckingTest.h"
#include "test/UnitTest/ErrnoSetterMatcher.h"
#include "test/UnitTest/Test.h"
#include "hdr/sys_stat_macros.h"
#include "hdr/sys_ioctl_macros.h"
using LlvmLibcSysIoctlTest = LIBC_NAMESPACE::testing::ErrnoCheckingTest;
using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds;
TEST_F(LlvmLibcSysIoctlTest, InvalidCommandAndFIONREAD) {
// Setup the test file
constexpr const char *TEST_FILE_NAME = "ioctl.test";
constexpr const char TEST_MSG[] = "ioctl test";
constexpr int TEST_MSG_SIZE = sizeof(TEST_MSG) - 1;
auto TEST_FILE = libc_make_test_file_path(TEST_FILE_NAME);
int new_test_file_fd = LIBC_NAMESPACE::open(
TEST_FILE, O_CREAT | O_WRONLY, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
ASSERT_THAT(
(int)LIBC_NAMESPACE::write(new_test_file_fd, TEST_MSG, TEST_MSG_SIZE),
Succeeds(TEST_MSG_SIZE));
ASSERT_ERRNO_SUCCESS();
ASSERT_THAT(LIBC_NAMESPACE::close(new_test_file_fd), Succeeds(0));
ASSERT_ERRNO_SUCCESS();
// Reopen the file for testing
int fd = LIBC_NAMESPACE::open(TEST_FILE, O_RDONLY);
ASSERT_ERRNO_SUCCESS();
ASSERT_GT(fd, 0);
// FIONREAD reports the number of available bytes to read for the passed fd
// This will report the full size of the file, as we haven't read anything yet
int n = -1;
int ret = LIBC_NAMESPACE::ioctl(fd, FIONREAD, &n);
ASSERT_ERRNO_SUCCESS();
ASSERT_GT(ret, -1);
ASSERT_EQ(n, TEST_MSG_SIZE);
// But if we read some bytes...
constexpr int READ_COUNT = 5;
char read_buffer[READ_COUNT];
ASSERT_THAT((int)LIBC_NAMESPACE::read(fd, read_buffer, READ_COUNT),
Succeeds(READ_COUNT));
// ... n should have decreased by the number of bytes we've read
int n_after_reading = -1;
ret = LIBC_NAMESPACE::ioctl(fd, FIONREAD, &n_after_reading);
ASSERT_ERRNO_SUCCESS();
ASSERT_GT(ret, -1);
ASSERT_EQ(n - READ_COUNT, n_after_reading);
// 0xDEADBEEF is just a random nonexistent command;
// calling this should always fail with ENOTTY
ret = LIBC_NAMESPACE::ioctl(fd, 0xDEADBEEF, NULL);
ASSERT_ERRNO_EQ(ENOTTY);
ASSERT_EQ(ret, -1);
ASSERT_THAT(LIBC_NAMESPACE::close(fd), Succeeds(0));
}
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