63 lines · cpp
1//===-- Unittests for dup -------------------------------------------------===//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-exception6//7//===----------------------------------------------------------------------===//8 9#include "src/fcntl/open.h"10#include "src/unistd/close.h"11#include "src/unistd/dup.h"12#include "src/unistd/read.h"13#include "src/unistd/unlink.h"14#include "src/unistd/write.h"15#include "test/UnitTest/ErrnoCheckingTest.h"16#include "test/UnitTest/ErrnoSetterMatcher.h"17#include "test/UnitTest/Test.h"18 19#include <sys/stat.h>20 21using LlvmLibcdupTest = LIBC_NAMESPACE::testing::ErrnoCheckingTest;22 23TEST_F(LlvmLibcdupTest, ReadAndWriteViaDup) {24 using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds;25 constexpr const char *FILENAME = "dup.test";26 auto TEST_FILE = libc_make_test_file_path(FILENAME);27 int fd = LIBC_NAMESPACE::open(TEST_FILE, O_WRONLY | O_CREAT, S_IRWXU);28 ASSERT_ERRNO_SUCCESS();29 ASSERT_GT(fd, 0);30 int dupfd = LIBC_NAMESPACE::dup(fd);31 ASSERT_ERRNO_SUCCESS();32 ASSERT_GT(dupfd, 0);33 34 // Write something via the dup35 constexpr char WRITE_DATA[] = "Hello, dup!";36 constexpr size_t WRITE_SIZE = sizeof(WRITE_DATA);37 ASSERT_EQ(ssize_t(WRITE_SIZE),38 LIBC_NAMESPACE::write(dupfd, WRITE_DATA, WRITE_SIZE));39 ASSERT_THAT(LIBC_NAMESPACE::close(dupfd), Succeeds(0));40 41 // Reopen the file for reading and create a dup.42 fd = LIBC_NAMESPACE::open(TEST_FILE, O_RDONLY);43 ASSERT_ERRNO_SUCCESS();44 ASSERT_GT(fd, 0);45 dupfd = LIBC_NAMESPACE::dup(fd);46 ASSERT_ERRNO_SUCCESS();47 ASSERT_GT(dupfd, 0);48 49 // Read the file content via the dup.50 char buf[WRITE_SIZE];51 ASSERT_THAT(LIBC_NAMESPACE::read(dupfd, buf, WRITE_SIZE),52 Succeeds(WRITE_SIZE));53 ASSERT_STREQ(buf, WRITE_DATA);54 55 ASSERT_THAT(LIBC_NAMESPACE::close(dupfd), Succeeds(0));56 ASSERT_THAT(LIBC_NAMESPACE::unlink(TEST_FILE), Succeeds(0));57}58 59TEST_F(LlvmLibcdupTest, DupBadFD) {60 using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Fails;61 ASSERT_THAT(LIBC_NAMESPACE::dup(-1), Fails(EBADF));62}63