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 "hdr/fcntl_macros.h" 21 #include <sys/stat.h> 22 23 namespace cpp = LIBC_NAMESPACE::cpp; 24 25 TEST(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(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(IN_FILE, O_RDONLY); 47 ASSERT_GT(in_fd, 0); 48 ASSERT_ERRNO_SUCCESS(); 49 int out_fd = LIBC_NAMESPACE::open(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(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