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02/02/2024 06:09:55 PM
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dir.go
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dir_darwin.go
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dir_plan9.go
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dir_windows.go
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dirent_aix.go
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dirent_dragonfly.go
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dirent_js.go
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dirent_linux.go
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dirent_solaris.go
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dirent_wasip1.go
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env.go
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env_test.go
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error.go
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error_test.go
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error_unix_test.go
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error_windows_test.go
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example_test.go
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exec
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exec.go
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exec_plan9.go
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exec_posix.go
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exec_unix.go
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exec_unix_test.go
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exec_windows.go
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exec_windows_test.go
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executable.go
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executable_darwin.go
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executable_windows.go
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export_linux_test.go
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export_test.go
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export_unix_test.go
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export_windows_test.go
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fifo_test.go
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file.go
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file_mutex_plan9.go
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file_open_unix.go
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file_open_wasip1.go
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file_plan9.go
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file_posix.go
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file_unix.go
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file_wasip1.go
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file_windows.go
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getwd.go
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os_test.go
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os_unix_test.go
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os_windows_test.go
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path.go
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path_plan9.go
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path_test.go
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path_unix.go
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path_windows.go
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path_windows_test.go
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pipe2_unix.go
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pipe_test.go
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pipe_unix.go
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pipe_wasm.go
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proc.go
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rawconn.go
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rawconn_test.go
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read_test.go
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readfrom_linux_test.go
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removeall_at.go
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removeall_noat.go
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removeall_test.go
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signal
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stat.go
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stat_aix.go
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stat_darwin.go
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stat_dragonfly.go
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stat_freebsd.go
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stat_js.go
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stat_linux.go
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stat_netbsd.go
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stat_openbsd.go
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stat_plan9.go
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stat_solaris.go
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stat_test.go
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stat_unix.go
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stat_wasip1.go
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stat_windows.go
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sticky_bsd.go
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sticky_notbsd.go
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sys.go
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sys_aix.go
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sys_bsd.go
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sys_js.go
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sys_linux.go
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sys_plan9.go
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sys_solaris.go
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sys_unix.go
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sys_wasip1.go
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sys_windows.go
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tempfile.go
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tempfile_test.go
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testdata
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timeout_test.go
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types.go
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types_plan9.go
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types_unix.go
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types_windows.go
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wait6_dragonfly.go
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wait6_freebsd64.go
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wait6_freebsd_386.go
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wait6_freebsd_arm.go
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wait6_netbsd.go
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wait_unimp.go
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wait_wait6.go
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wait_waitid.go
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writeto_linux_test.go
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zero_copy_linux.go
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zero_copy_stub.go
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Editing: writeto_linux_test.go
Close
// Copyright 2023 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. package os_test import ( "bytes" "internal/poll" "io" "math/rand" "net" . "os" "strconv" "syscall" "testing" "time" ) func TestSendFile(t *testing.T) { sizes := []int{ 1, 42, 1025, syscall.Getpagesize() + 1, 32769, } t.Run("sendfile-to-unix", func(t *testing.T) { for _, size := range sizes { t.Run(strconv.Itoa(size), func(t *testing.T) { testSendFile(t, "unix", int64(size)) }) } }) t.Run("sendfile-to-tcp", func(t *testing.T) { for _, size := range sizes { t.Run(strconv.Itoa(size), func(t *testing.T) { testSendFile(t, "tcp", int64(size)) }) } }) } func testSendFile(t *testing.T, proto string, size int64) { dst, src, recv, data, hook := newSendFileTest(t, proto, size) // Now call WriteTo (through io.Copy), which will hopefully call poll.SendFile n, err := io.Copy(dst, src) if err != nil { t.Fatalf("io.Copy error: %v", err) } // We should have called poll.Splice with the right file descriptor arguments. if n > 0 && !hook.called { t.Fatal("expected to called poll.SendFile") } if hook.called && hook.srcfd != int(src.Fd()) { t.Fatalf("wrong source file descriptor: got %d, want %d", hook.srcfd, src.Fd()) } sc, ok := dst.(syscall.Conn) if !ok { t.Fatalf("destination is not a syscall.Conn") } rc, err := sc.SyscallConn() if err != nil { t.Fatalf("destination SyscallConn error: %v", err) } if err = rc.Control(func(fd uintptr) { if hook.called && hook.dstfd != int(fd) { t.Fatalf("wrong destination file descriptor: got %d, want %d", hook.dstfd, int(fd)) } }); err != nil { t.Fatalf("destination Conn Control error: %v", err) } // Verify the data size and content. dataSize := len(data) dstData := make([]byte, dataSize) m, err := io.ReadFull(recv, dstData) if err != nil { t.Fatalf("server Conn Read error: %v", err) } if n != int64(dataSize) { t.Fatalf("data length mismatch for io.Copy, got %d, want %d", n, dataSize) } if m != dataSize { t.Fatalf("data length mismatch for net.Conn.Read, got %d, want %d", m, dataSize) } if !bytes.Equal(dstData, data) { t.Errorf("data mismatch, got %s, want %s", dstData, data) } } // newSendFileTest initializes a new test for sendfile. // // It creates source file and destination sockets, and populates the source file // with random data of the specified size. It also hooks package os' call // to poll.Sendfile and returns the hook so it can be inspected. func newSendFileTest(t *testing.T, proto string, size int64) (net.Conn, *File, net.Conn, []byte, *sendFileHook) { t.Helper() hook := hookSendFile(t) client, server := createSocketPair(t, proto) tempFile, data := createTempFile(t, size) return client, tempFile, server, data, hook } func hookSendFile(t *testing.T) *sendFileHook { h := new(sendFileHook) h.install() t.Cleanup(h.uninstall) return h } type sendFileHook struct { called bool dstfd int srcfd int remain int64 written int64 handled bool err error original func(dst *poll.FD, src int, remain int64) (int64, error, bool) } func (h *sendFileHook) install() { h.original = *PollSendFile *PollSendFile = func(dst *poll.FD, src int, remain int64) (int64, error, bool) { h.called = true h.dstfd = dst.Sysfd h.srcfd = src h.remain = remain h.written, h.err, h.handled = h.original(dst, src, remain) return h.written, h.err, h.handled } } func (h *sendFileHook) uninstall() { *PollSendFile = h.original } func createTempFile(t *testing.T, size int64) (*File, []byte) { f, err := CreateTemp(t.TempDir(), "writeto-sendfile-to-socket") if err != nil { t.Fatalf("failed to create temporary file: %v", err) } t.Cleanup(func() { f.Close() }) randSeed := time.Now().Unix() t.Logf("random data seed: %d\n", randSeed) prng := rand.New(rand.NewSource(randSeed)) data := make([]byte, size) prng.Read(data) if _, err := f.Write(data); err != nil { t.Fatalf("failed to create and feed the file: %v", err) } if err := f.Sync(); err != nil { t.Fatalf("failed to save the file: %v", err) } if _, err := f.Seek(0, io.SeekStart); err != nil { t.Fatalf("failed to rewind the file: %v", err) } return f, data }