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-rw-r--r--test/syscalls/linux/sendfile.cc536
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diff --git a/test/syscalls/linux/sendfile.cc b/test/syscalls/linux/sendfile.cc
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--- a/test/syscalls/linux/sendfile.cc
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@@ -1,536 +0,0 @@
-// Copyright 2018 The gVisor Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include <fcntl.h>
-#include <sys/eventfd.h>
-#include <sys/sendfile.h>
-#include <unistd.h>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/strings/string_view.h"
-#include "absl/time/clock.h"
-#include "absl/time/time.h"
-#include "test/util/eventfd_util.h"
-#include "test/util/file_descriptor.h"
-#include "test/util/temp_path.h"
-#include "test/util/test_util.h"
-#include "test/util/thread_util.h"
-
-namespace gvisor {
-namespace testing {
-
-namespace {
-
-TEST(SendFileTest, SendZeroBytes) {
- // Create temp files.
- const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
- const TempPath out_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
-
- // Open the input file as read only.
- const FileDescriptor inf =
- ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_RDONLY));
-
- // Open the output file as write only.
- const FileDescriptor outf =
- ASSERT_NO_ERRNO_AND_VALUE(Open(out_file.path(), O_WRONLY));
-
- // Send data and verify that sendfile returns the correct value.
- EXPECT_THAT(sendfile(outf.get(), inf.get(), nullptr, 0),
- SyscallSucceedsWithValue(0));
-}
-
-TEST(SendFileTest, InvalidOffset) {
- // Create temp files.
- const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
- const TempPath out_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
-
- // Open the input file as read only.
- const FileDescriptor inf =
- ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_RDONLY));
-
- // Open the output file as write only.
- const FileDescriptor outf =
- ASSERT_NO_ERRNO_AND_VALUE(Open(out_file.path(), O_WRONLY));
-
- // Send data and verify that sendfile returns the correct value.
- off_t offset = -1;
- EXPECT_THAT(sendfile(outf.get(), inf.get(), &offset, 0),
- SyscallFailsWithErrno(EINVAL));
-}
-
-TEST(SendFileTest, SendTrivially) {
- // Create temp files.
- constexpr char kData[] = "To be, or not to be, that is the question:";
- constexpr int kDataSize = sizeof(kData) - 1;
- const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith(
- GetAbsoluteTestTmpdir(), kData, TempPath::kDefaultFileMode));
- const TempPath out_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
-
- // Open the input file as read only.
- const FileDescriptor inf =
- ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_RDONLY));
-
- // Open the output file as write only.
- FileDescriptor outf;
- outf = ASSERT_NO_ERRNO_AND_VALUE(Open(out_file.path(), O_WRONLY));
-
- // Send data and verify that sendfile returns the correct value.
- int bytes_sent;
- EXPECT_THAT(bytes_sent = sendfile(outf.get(), inf.get(), nullptr, kDataSize),
- SyscallSucceedsWithValue(kDataSize));
-
- // Close outf to avoid leak.
- outf.reset();
-
- // Open the output file as read only.
- outf = ASSERT_NO_ERRNO_AND_VALUE(Open(out_file.path(), O_RDONLY));
-
- // Verify that the output file has the correct data.
- char actual[kDataSize];
- ASSERT_THAT(read(outf.get(), &actual, bytes_sent),
- SyscallSucceedsWithValue(kDataSize));
- EXPECT_EQ(kData, absl::string_view(actual, bytes_sent));
-}
-
-TEST(SendFileTest, SendTriviallyWithBothFilesReadWrite) {
- // Create temp files.
- constexpr char kData[] = "Whether 'tis nobler in the mind to suffer";
- constexpr int kDataSize = sizeof(kData) - 1;
- const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith(
- GetAbsoluteTestTmpdir(), kData, TempPath::kDefaultFileMode));
- const TempPath out_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
-
- // Open the input file as readwrite.
- const FileDescriptor inf =
- ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_RDWR));
-
- // Open the output file as readwrite.
- FileDescriptor outf;
- outf = ASSERT_NO_ERRNO_AND_VALUE(Open(out_file.path(), O_RDWR));
-
- // Send data and verify that sendfile returns the correct value.
- int bytes_sent;
- EXPECT_THAT(bytes_sent = sendfile(outf.get(), inf.get(), nullptr, kDataSize),
- SyscallSucceedsWithValue(kDataSize));
-
- // Close outf to avoid leak.
- outf.reset();
-
- // Open the output file as read only.
- outf = ASSERT_NO_ERRNO_AND_VALUE(Open(out_file.path(), O_RDONLY));
-
- // Verify that the output file has the correct data.
- char actual[kDataSize];
- ASSERT_THAT(read(outf.get(), &actual, bytes_sent),
- SyscallSucceedsWithValue(kDataSize));
- EXPECT_EQ(kData, absl::string_view(actual, bytes_sent));
-}
-
-TEST(SendFileTest, SendAndUpdateFileOffset) {
- // Create temp files.
- // Test input string length must be > 2 AND even.
- constexpr char kData[] = "The slings and arrows of outrageous fortune,";
- constexpr int kDataSize = sizeof(kData) - 1;
- constexpr int kHalfDataSize = kDataSize / 2;
- const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith(
- GetAbsoluteTestTmpdir(), kData, TempPath::kDefaultFileMode));
- const TempPath out_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
-
- // Open the input file as read only.
- const FileDescriptor inf =
- ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_RDONLY));
-
- // Open the output file as write only.
- FileDescriptor outf;
- outf = ASSERT_NO_ERRNO_AND_VALUE(Open(out_file.path(), O_WRONLY));
-
- // Send data and verify that sendfile returns the correct value.
- int bytes_sent;
- EXPECT_THAT(
- bytes_sent = sendfile(outf.get(), inf.get(), nullptr, kHalfDataSize),
- SyscallSucceedsWithValue(kHalfDataSize));
-
- // Close outf to avoid leak.
- outf.reset();
-
- // Open the output file as read only.
- outf = ASSERT_NO_ERRNO_AND_VALUE(Open(out_file.path(), O_RDONLY));
-
- // Verify that the output file has the correct data.
- char actual[kHalfDataSize];
- ASSERT_THAT(read(outf.get(), &actual, bytes_sent),
- SyscallSucceedsWithValue(kHalfDataSize));
- EXPECT_EQ(absl::string_view(kData, kHalfDataSize),
- absl::string_view(actual, bytes_sent));
-
- // Verify that the input file offset has been updated
- ASSERT_THAT(read(inf.get(), &actual, kDataSize - bytes_sent),
- SyscallSucceedsWithValue(kHalfDataSize));
- EXPECT_EQ(
- absl::string_view(kData + kDataSize - bytes_sent, kDataSize - bytes_sent),
- absl::string_view(actual, kHalfDataSize));
-}
-
-TEST(SendFileTest, SendAndUpdateFileOffsetFromNonzeroStartingPoint) {
- // Create temp files.
- // Test input string length must be > 2 AND divisible by 4.
- constexpr char kData[] = "The slings and arrows of outrageous fortune,";
- constexpr int kDataSize = sizeof(kData) - 1;
- constexpr int kHalfDataSize = kDataSize / 2;
- constexpr int kQuarterDataSize = kHalfDataSize / 2;
- const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith(
- GetAbsoluteTestTmpdir(), kData, TempPath::kDefaultFileMode));
- const TempPath out_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
-
- // Open the input file as read only.
- const FileDescriptor inf =
- ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_RDONLY));
-
- // Open the output file as write only.
- FileDescriptor outf;
- outf = ASSERT_NO_ERRNO_AND_VALUE(Open(out_file.path(), O_WRONLY));
-
- // Read a quarter of the data from the infile which should update the file
- // offset, we don't actually care about the data so it goes into the garbage.
- char garbage[kQuarterDataSize];
- ASSERT_THAT(read(inf.get(), &garbage, kQuarterDataSize),
- SyscallSucceedsWithValue(kQuarterDataSize));
-
- // Send data and verify that sendfile returns the correct value.
- int bytes_sent;
- EXPECT_THAT(
- bytes_sent = sendfile(outf.get(), inf.get(), nullptr, kHalfDataSize),
- SyscallSucceedsWithValue(kHalfDataSize));
-
- // Close out_fd to avoid leak.
- outf.reset();
-
- // Open the output file as read only.
- outf = ASSERT_NO_ERRNO_AND_VALUE(Open(out_file.path(), O_RDONLY));
-
- // Verify that the output file has the correct data.
- char actual[kHalfDataSize];
- ASSERT_THAT(read(outf.get(), &actual, bytes_sent),
- SyscallSucceedsWithValue(kHalfDataSize));
- EXPECT_EQ(absl::string_view(kData + kQuarterDataSize, kHalfDataSize),
- absl::string_view(actual, bytes_sent));
-
- // Verify that the input file offset has been updated
- ASSERT_THAT(read(inf.get(), &actual, kQuarterDataSize),
- SyscallSucceedsWithValue(kQuarterDataSize));
-
- EXPECT_EQ(
- absl::string_view(kData + kDataSize - kQuarterDataSize, kQuarterDataSize),
- absl::string_view(actual, kQuarterDataSize));
-}
-
-TEST(SendFileTest, SendAndUpdateGivenOffset) {
- // Create temp files.
- // Test input string length must be >= 4 AND divisible by 4.
- constexpr char kData[] = "Or to take Arms against a Sea of troubles,";
- constexpr int kDataSize = sizeof(kData) + 1;
- constexpr int kHalfDataSize = kDataSize / 2;
- constexpr int kQuarterDataSize = kHalfDataSize / 2;
- constexpr int kThreeFourthsDataSize = 3 * kDataSize / 4;
-
- const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith(
- GetAbsoluteTestTmpdir(), kData, TempPath::kDefaultFileMode));
- const TempPath out_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
-
- // Open the input file as read only.
- const FileDescriptor inf =
- ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_RDONLY));
-
- // Open the output file as write only.
- FileDescriptor outf;
- outf = ASSERT_NO_ERRNO_AND_VALUE(Open(out_file.path(), O_WRONLY));
-
- // Create offset for sending.
- off_t offset = kQuarterDataSize;
-
- // Send data and verify that sendfile returns the correct value.
- int bytes_sent;
- EXPECT_THAT(
- bytes_sent = sendfile(outf.get(), inf.get(), &offset, kHalfDataSize),
- SyscallSucceedsWithValue(kHalfDataSize));
-
- // Close out_fd to avoid leak.
- outf.reset();
-
- // Open the output file as read only.
- outf = ASSERT_NO_ERRNO_AND_VALUE(Open(out_file.path(), O_RDONLY));
-
- // Verify that the output file has the correct data.
- char actual[kHalfDataSize];
- ASSERT_THAT(read(outf.get(), &actual, bytes_sent),
- SyscallSucceedsWithValue(kHalfDataSize));
- EXPECT_EQ(absl::string_view(kData + kQuarterDataSize, kHalfDataSize),
- absl::string_view(actual, bytes_sent));
-
- // Verify that the input file offset has NOT been updated.
- ASSERT_THAT(read(inf.get(), &actual, kHalfDataSize),
- SyscallSucceedsWithValue(kHalfDataSize));
- EXPECT_EQ(absl::string_view(kData, kHalfDataSize),
- absl::string_view(actual, kHalfDataSize));
-
- // Verify that the offset pointer has been updated.
- EXPECT_EQ(offset, kThreeFourthsDataSize);
-}
-
-TEST(SendFileTest, DoNotSendfileIfOutfileIsAppendOnly) {
- // Create temp files.
- constexpr char kData[] = "And by opposing end them: to die, to sleep";
- constexpr int kDataSize = sizeof(kData) - 1;
-
- const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith(
- GetAbsoluteTestTmpdir(), kData, TempPath::kDefaultFileMode));
- const TempPath out_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
-
- // Open the input file as read only.
- const FileDescriptor inf =
- ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_RDONLY));
-
- // Open the output file as append only.
- const FileDescriptor outf =
- ASSERT_NO_ERRNO_AND_VALUE(Open(out_file.path(), O_WRONLY | O_APPEND));
-
- // Send data and verify that sendfile returns the correct errno.
- EXPECT_THAT(sendfile(outf.get(), inf.get(), nullptr, kDataSize),
- SyscallFailsWithErrno(EINVAL));
-}
-
-TEST(SendFileTest, AppendCheckOrdering) {
- constexpr char kData[] = "And by opposing end them: to die, to sleep";
- constexpr int kDataSize = sizeof(kData) - 1;
- const TempPath file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith(
- GetAbsoluteTestTmpdir(), kData, TempPath::kDefaultFileMode));
-
- const FileDescriptor read =
- ASSERT_NO_ERRNO_AND_VALUE(Open(file.path(), O_RDONLY));
- const FileDescriptor write =
- ASSERT_NO_ERRNO_AND_VALUE(Open(file.path(), O_WRONLY));
- const FileDescriptor append =
- ASSERT_NO_ERRNO_AND_VALUE(Open(file.path(), O_APPEND));
-
- // Check that read/write file mode is verified before append.
- EXPECT_THAT(sendfile(append.get(), read.get(), nullptr, kDataSize),
- SyscallFailsWithErrno(EBADF));
- EXPECT_THAT(sendfile(write.get(), write.get(), nullptr, kDataSize),
- SyscallFailsWithErrno(EBADF));
-}
-
-TEST(SendFileTest, DoNotSendfileIfOutfileIsNotWritable) {
- // Create temp files.
- constexpr char kData[] = "No more; and by a sleep, to say we end";
- constexpr int kDataSize = sizeof(kData) - 1;
-
- const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith(
- GetAbsoluteTestTmpdir(), kData, TempPath::kDefaultFileMode));
- const TempPath out_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
-
- // Open the input file as read only.
- const FileDescriptor inf =
- ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_RDONLY));
-
- // Open the output file as read only.
- const FileDescriptor outf =
- ASSERT_NO_ERRNO_AND_VALUE(Open(out_file.path(), O_RDONLY));
-
- // Send data and verify that sendfile returns the correct errno.
- EXPECT_THAT(sendfile(outf.get(), inf.get(), nullptr, kDataSize),
- SyscallFailsWithErrno(EBADF));
-}
-
-TEST(SendFileTest, DoNotSendfileIfInfileIsNotReadable) {
- // Create temp files.
- constexpr char kData[] = "the heart-ache, and the thousand natural shocks";
- constexpr int kDataSize = sizeof(kData) - 1;
-
- const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith(
- GetAbsoluteTestTmpdir(), kData, TempPath::kDefaultFileMode));
- const TempPath out_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
-
- // Open the input file as write only.
- const FileDescriptor inf =
- ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_WRONLY));
-
- // Open the output file as write only.
- const FileDescriptor outf =
- ASSERT_NO_ERRNO_AND_VALUE(Open(out_file.path(), O_WRONLY));
-
- // Send data and verify that sendfile returns the correct errno.
- EXPECT_THAT(sendfile(outf.get(), inf.get(), nullptr, kDataSize),
- SyscallFailsWithErrno(EBADF));
-}
-
-TEST(SendFileTest, DoNotSendANegativeNumberOfBytes) {
- // Create temp files.
- constexpr char kData[] = "that Flesh is heir to? 'Tis a consummation";
-
- const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith(
- GetAbsoluteTestTmpdir(), kData, TempPath::kDefaultFileMode));
- const TempPath out_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
-
- // Open the input file as read only.
- const FileDescriptor inf =
- ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_RDONLY));
-
- // Open the output file as write only.
- const FileDescriptor outf =
- ASSERT_NO_ERRNO_AND_VALUE(Open(out_file.path(), O_WRONLY));
-
- // Send data and verify that sendfile returns the correct errno.
- EXPECT_THAT(sendfile(outf.get(), inf.get(), nullptr, -1),
- SyscallFailsWithErrno(EINVAL));
-}
-
-TEST(SendFileTest, SendTheCorrectNumberOfBytesEvenIfWeTryToSendTooManyBytes) {
- // Create temp files.
- constexpr char kData[] = "devoutly to be wished. To die, to sleep,";
- constexpr int kDataSize = sizeof(kData) - 1;
-
- const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith(
- GetAbsoluteTestTmpdir(), kData, TempPath::kDefaultFileMode));
- const TempPath out_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
-
- // Open the input file as read only.
- const FileDescriptor inf =
- ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_RDONLY));
-
- // Open the output file as write only.
- FileDescriptor outf;
- outf = ASSERT_NO_ERRNO_AND_VALUE(Open(out_file.path(), O_WRONLY));
-
- // Send data and verify that sendfile returns the correct value.
- int bytes_sent;
- EXPECT_THAT(
- bytes_sent = sendfile(outf.get(), inf.get(), nullptr, kDataSize + 100),
- SyscallSucceedsWithValue(kDataSize));
-
- // Close outf to avoid leak.
- outf.reset();
-
- // Open the output file as read only.
- outf = ASSERT_NO_ERRNO_AND_VALUE(Open(out_file.path(), O_RDONLY));
-
- // Verify that the output file has the correct data.
- char actual[kDataSize];
- ASSERT_THAT(read(outf.get(), &actual, bytes_sent),
- SyscallSucceedsWithValue(kDataSize));
- EXPECT_EQ(kData, absl::string_view(actual, bytes_sent));
-}
-
-TEST(SendFileTest, SendToNotARegularFile) {
- // Make temp input directory and open as read only.
- const TempPath dir = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateDir());
- const FileDescriptor inf =
- ASSERT_NO_ERRNO_AND_VALUE(Open(dir.path(), O_RDONLY));
-
- // Make temp output file and open as write only.
- const TempPath out_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFile());
- const FileDescriptor outf =
- ASSERT_NO_ERRNO_AND_VALUE(Open(out_file.path(), O_WRONLY));
-
- // Receive an error since a directory is not a regular file.
- EXPECT_THAT(sendfile(outf.get(), inf.get(), nullptr, 0),
- SyscallFailsWithErrno(EINVAL));
-}
-
-TEST(SendFileTest, SendPipeWouldBlock) {
- // Create temp file.
- constexpr char kData[] =
- "The fool doth think he is wise, but the wise man knows himself to be a "
- "fool.";
- constexpr int kDataSize = sizeof(kData) - 1;
- const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith(
- GetAbsoluteTestTmpdir(), kData, TempPath::kDefaultFileMode));
-
- // Open the input file as read only.
- const FileDescriptor inf =
- ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_RDONLY));
-
- // Setup the output named pipe.
- int fds[2];
- ASSERT_THAT(pipe2(fds, O_NONBLOCK), SyscallSucceeds());
- const FileDescriptor rfd(fds[0]);
- const FileDescriptor wfd(fds[1]);
-
- // Fill up the pipe's buffer.
- int pipe_size = -1;
- ASSERT_THAT(pipe_size = fcntl(wfd.get(), F_GETPIPE_SZ), SyscallSucceeds());
- std::vector<char> buf(2 * pipe_size);
- ASSERT_THAT(write(wfd.get(), buf.data(), buf.size()),
- SyscallSucceedsWithValue(pipe_size));
-
- EXPECT_THAT(sendfile(wfd.get(), inf.get(), nullptr, kDataSize),
- SyscallFailsWithErrno(EWOULDBLOCK));
-}
-
-TEST(SendFileTest, SendPipeBlocks) {
- // Create temp file.
- constexpr char kData[] =
- "The fault, dear Brutus, is not in our stars, but in ourselves.";
- constexpr int kDataSize = sizeof(kData) - 1;
- const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith(
- GetAbsoluteTestTmpdir(), kData, TempPath::kDefaultFileMode));
-
- // Open the input file as read only.
- const FileDescriptor inf =
- ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_RDONLY));
-
- // Setup the output named pipe.
- int fds[2];
- ASSERT_THAT(pipe(fds), SyscallSucceeds());
- const FileDescriptor rfd(fds[0]);
- const FileDescriptor wfd(fds[1]);
-
- // Fill up the pipe's buffer.
- int pipe_size = -1;
- ASSERT_THAT(pipe_size = fcntl(wfd.get(), F_GETPIPE_SZ), SyscallSucceeds());
- std::vector<char> buf(pipe_size);
- ASSERT_THAT(write(wfd.get(), buf.data(), buf.size()),
- SyscallSucceedsWithValue(pipe_size));
-
- ScopedThread t([&]() {
- absl::SleepFor(absl::Milliseconds(100));
- ASSERT_THAT(read(rfd.get(), buf.data(), buf.size()),
- SyscallSucceedsWithValue(pipe_size));
- });
-
- EXPECT_THAT(sendfile(wfd.get(), inf.get(), nullptr, kDataSize),
- SyscallSucceedsWithValue(kDataSize));
-}
-
-TEST(SendFileTest, SendToSpecialFile) {
- // Create temp file.
- const TempPath in_file = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith(
- GetAbsoluteTestTmpdir(), "", TempPath::kDefaultFileMode));
-
- const FileDescriptor inf =
- ASSERT_NO_ERRNO_AND_VALUE(Open(in_file.path(), O_RDWR));
- constexpr int kSize = 0x7ff;
- ASSERT_THAT(ftruncate(inf.get(), kSize), SyscallSucceeds());
-
- auto eventfd = ASSERT_NO_ERRNO_AND_VALUE(NewEventFD());
-
- // eventfd can accept a number of bytes which is a multiple of 8.
- EXPECT_THAT(sendfile(eventfd.get(), inf.get(), nullptr, 0xfffff),
- SyscallSucceedsWithValue(kSize & (~7)));
-}
-
-} // namespace
-
-} // namespace testing
-} // namespace gvisor