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// Copyright 2024 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.
//go:build unix
package net
import (
"internal/testpty"
"io"
"os"
"sync"
"syscall"
"testing"
)
// Issue 70763: test that we don't fail on sendfile from a tty.
func TestCopyFromTTY(t *testing.T) {
pty, ttyName, err := testpty.Open()
if err != nil {
t.Skipf("skipping test because pty open failed: %v", err)
}
defer pty.Close()
// Use syscall.Open so that the tty is blocking.
ttyFD, err := syscall.Open(ttyName, syscall.O_RDWR, 0)
if err != nil {
t.Skipf("skipping test because tty open failed: %v", err)
}
defer syscall.Close(ttyFD)
tty := os.NewFile(uintptr(ttyFD), "tty")
defer tty.Close()
ln := newLocalListener(t, "tcp")
defer ln.Close()
ch := make(chan bool)
const data = "data\n"
var wg sync.WaitGroup
defer wg.Wait()
wg.Add(1)
go func() {
defer wg.Done()
conn, err := ln.Accept()
if err != nil {
t.Error(err)
return
}
defer conn.Close()
buf := make([]byte, len(data))
if _, err := io.ReadFull(conn, buf); err != nil {
t.Error(err)
}
ch <- true
}()
conn, err := Dial("tcp", ln.Addr().String())
if err != nil {
t.Fatal(err)
}
defer conn.Close()
wg.Add(1)
go func() {
defer wg.Done()
if _, err := pty.Write([]byte(data)); err != nil {
t.Error(err)
}
<-ch
if err := pty.Close(); err != nil {
t.Error(err)
}
}()
lr := io.LimitReader(tty, int64(len(data)))
if _, err := io.Copy(conn, lr); err != nil {
t.Error(err)
}
}