1//===-- Unittests for sendfile --------------------------------------------===//
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-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "src/__support/CPP/string_view.h"
10#include "src/errno/libc_errno.h"
11#include "src/fcntl/open.h"
12#include "src/sys/sendfile/sendfile.h"
13#include "src/unistd/close.h"
14#include "src/unistd/read.h"
15#include "src/unistd/unlink.h"
16#include "src/unistd/write.h"
17#include "test/UnitTest/ErrnoSetterMatcher.h"
18#include "test/UnitTest/Test.h"
19
20#include <fcntl.h>
21#include <sys/stat.h>
22
23namespace cpp = LIBC_NAMESPACE::cpp;
24
25TEST(LlvmLibcSendfileTest, CreateAndTransfer) {
26 using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Fails;
27 using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds;
28
29 // The test strategy is to
30 // 1. Create a temporary file with known data.
31 // 2. Use sendfile to copy it to another file.
32 // 3. Make sure that the data was actually copied.
33 // 4. Clean up the temporary files.
34 constexpr const char *IN_FILE = "testdata/sendfile_in.test";
35 constexpr const char *OUT_FILE = "testdata/sendfile_out.test";
36 const char IN_DATA[] = "sendfile test";
37 constexpr ssize_t IN_SIZE = ssize_t(sizeof(IN_DATA));
38 LIBC_NAMESPACE::libc_errno = 0;
39
40 int in_fd = LIBC_NAMESPACE::open(path: IN_FILE, O_CREAT | O_WRONLY, S_IRWXU);
41 ASSERT_GT(in_fd, 0);
42 ASSERT_ERRNO_SUCCESS();
43 ASSERT_EQ(LIBC_NAMESPACE::write(in_fd, IN_DATA, IN_SIZE), IN_SIZE);
44 ASSERT_THAT(LIBC_NAMESPACE::close(in_fd), Succeeds(0));
45
46 in_fd = LIBC_NAMESPACE::open(path: IN_FILE, O_RDONLY);
47 ASSERT_GT(in_fd, 0);
48 ASSERT_ERRNO_SUCCESS();
49 int out_fd = LIBC_NAMESPACE::open(path: OUT_FILE, O_CREAT | O_WRONLY, S_IRWXU);
50 ASSERT_GT(out_fd, 0);
51 ASSERT_ERRNO_SUCCESS();
52 ssize_t size = LIBC_NAMESPACE::sendfile(in_fd, out_fd, nullptr, IN_SIZE);
53 ASSERT_EQ(size, IN_SIZE);
54 ASSERT_THAT(LIBC_NAMESPACE::close(in_fd), Succeeds(0));
55 ASSERT_THAT(LIBC_NAMESPACE::close(out_fd), Succeeds(0));
56
57 out_fd = LIBC_NAMESPACE::open(path: OUT_FILE, O_RDONLY);
58 ASSERT_GT(out_fd, 0);
59 ASSERT_ERRNO_SUCCESS();
60 char buf[IN_SIZE];
61 ASSERT_EQ(IN_SIZE, LIBC_NAMESPACE::read(out_fd, buf, IN_SIZE));
62 ASSERT_EQ(cpp::string_view(buf), cpp::string_view(IN_DATA));
63
64 ASSERT_THAT(LIBC_NAMESPACE::unlink(IN_FILE), Succeeds(0));
65 ASSERT_THAT(LIBC_NAMESPACE::unlink(OUT_FILE), Succeeds(0));
66}
67

source code of libc/test/src/sys/sendfile/sendfile_test.cpp