1// Copyright 2023 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5package main
6
7import (
8	"fmt"
9	"io"
10	"log"
11	"os"
12)
13
14func main() {
15	f, err := os.OpenFile(os.Getenv("TEST_OUTPUT"), os.O_CREATE|os.O_RDWR, 0600)
16	if err != nil {
17		log.Fatalf("os.Open failed: %s", err)
18	}
19	defer f.Close()
20	b, err := io.ReadAll(os.Stdin)
21	if err != nil {
22		log.Fatalf("io.ReadAll(os.Stdin) failed: %s", err)
23	}
24	if len(b) != 0 {
25		log.Fatalf("io.ReadAll(os.Stdin) returned non-nil: %x", b)
26	}
27	fmt.Fprintf(os.Stdout, "stdout\n")
28	fmt.Fprintf(os.Stderr, "stderr\n")
29}
30