}

// StdinPipe returns a pipe that will be connected to the command's
// standard input when the command starts.
// The pipe will be closed automatically after [Cmd.Wait] sees the command exit.
// A caller need only call Close to force the pipe to close sooner.
// For example, if the command being run will not exit until standard input
// is closed, the caller must close the pipe.

	}
}

// Test that sendfile doesn't put a pipe into blocking mode.
func TestSendfilePipe(t *testing.T) {
	switch runtime.GOOS {
	case "plan9", "windows", "js", "wasip1":
		// These systems don't support deadlines on pipes.
		t.Skipf("skipping on %s", runtime.GOOS)
	}

	t.Parallel()

	ln := newLocalListener(t, "tcp")
	defer ln.Close()

	r, w, err := os.Pipe()
	if err != nil {
		t.Fatal(err)
	}

		// stderr pipe is closed.
		if ee := new(*exec.ExitError); !errors.As(err, ee) {
			t.Errorf("Wait error = %v; want %T", err, *ee)
		}
	})

	// If the process exits with status 0 but leaves a child behind writing
	// to its output pipes, Wait should only wait for WaitDelay before
	// closing the pipes and returning.  Wait should return ErrWaitDelay

			pipe.IsAssign = next.typ == itemAssign
			t.nextNonSpace()
			pipe.Decl = append(pipe.Decl, t.newVariable(v.pos, v.val))
			t.vars = append(t.vars, v.val)
		case next.typ == itemChar && next.val == ",":
			t.nextNonSpace()
			pipe.Decl = append(pipe.Decl, t.newVariable(v.pos, v.val))
			t.vars = append(t.vars, v.val)
			if context == "range" && len(pipe.Decl) < 2 {
				switch t.peekNonSpace().typ {

	NodeType
	Pos
	tr   *Tree
	Line int       // The line number in the input. Deprecated: Kept for compatibility.
	Pipe *PipeNode // The pipeline in the action.
}

func (t *Tree) newAction(pos Pos, line int, pipe *PipeNode) *ActionNode {
	return &ActionNode{tr: t, NodeType: NodeAction, Pos: pos, Line: line, Pipe: pipe}
}

func (a *ActionNode) String() string {
	var sb strings.Builder
	a.writeTo(&sb)
	return sb.String()

	return readInt(buf, unsafe.Offsetof(Dirent{}.Namlen), unsafe.Sizeof(Dirent{}.Namlen))
}

func Pipe(p []int) (err error) {
	return Pipe2(p, 0)
}

//sysnb	pipe2(p *[2]_C_int, flags int) (err error)

func Pipe2(p []int, flags int) error {
	if len(p) != 2 {
		return EINVAL
	}
	var pp [2]_C_int
	err := pipe2(&pp, flags)
	if err == nil {
		p[0] = int(pp[0])
		p[1] = int(pp[1])
	}
	return err
}

		return 0, false
	}
	return reclen - uint64(unsafe.Offsetof(Dirent{}.Name)), true
}

func Pipe(p []int) (err error) {
	return Pipe2(p, 0)
}

//sysnb	pipe2(p *[2]_C_int, flags int) (err error)

func Pipe2(p []int, flags int) error {
	if len(p) != 2 {
		return EINVAL
	}
	var pp [2]_C_int
	err := pipe2(&pp, flags)
	if err == nil {
		p[0] = int(pp[0])
		p[1] = int(pp[1])
	}
	return err
}

	// so that pass 2 won't stomp on an fd it needs later.
	if pipe < nextfd {
		r1, _, _ = RawSyscall(SYS_DUP, uintptr(pipe), uintptr(nextfd), 0)
		if int32(r1) == -1 {
			goto childerror
		}
		pipe = nextfd
		nextfd++
	}
	for i = 0; i < len(fd); i++ {
		if fd[i] >= 0 && fd[i] < i {
			if nextfd == pipe { // don't stomp on pipe
				nextfd++
			}

			log.Fatalf("opening sidecar log file for child: %v", err)
		}
		defer childLog.Close()
		cmd.Stderr = childLog
	}

	if reportCrashes {
		pipe, err := cmd.StdinPipe()
		if err != nil {
			log.Fatalf("StdinPipe: %v", err)
		}

		crashmonitor.Parent(pipe.(*os.File)) // (this conversion is safe)
	}

	if err := cmd.Start(); err != nil {
		log.Fatalf("can't start telemetry child process: %v", err)
	}

	cmd.Env = w.env[:len(w.env):len(w.env)] // copy on append to ensure workers don't overwrite each other.

	// Create the "fuzz_in" and "fuzz_out" pipes so we can communicate with
	// the worker. We don't use stdin and stdout, since the test binary may
	// do something else with those.
	//
	// Each pipe has a reader and a writer. The coordinator writes to fuzzInW
	// and reads from fuzzOutR. The worker inherits fuzzInR and fuzzOutW.