// Copyright 2012 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package signal
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import (
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"bytes"
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"internal/testenv"
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"io/ioutil"
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"os"
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"os/exec"
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"path/filepath"
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"syscall"
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"testing"
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"time"
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)
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func sendCtrlBreak(t *testing.T, pid int) {
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d, e := syscall.LoadDLL("kernel32.dll")
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if e != nil {
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t.Fatalf("LoadDLL: %v\n", e)
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}
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p, e := d.FindProc("GenerateConsoleCtrlEvent")
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if e != nil {
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t.Fatalf("FindProc: %v\n", e)
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}
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r, _, e := p.Call(syscall.CTRL_BREAK_EVENT, uintptr(pid))
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if r == 0 {
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t.Fatalf("GenerateConsoleCtrlEvent: %v\n", e)
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}
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}
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func TestCtrlBreak(t *testing.T) {
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// create source file
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const source = `
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package main
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import (
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"log"
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"os"
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"os/signal"
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"time"
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)
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func main() {
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c := make(chan os.Signal, 10)
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signal.Notify(c)
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select {
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case s := <-c:
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if s != os.Interrupt {
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log.Fatalf("Wrong signal received: got %q, want %q\n", s, os.Interrupt)
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}
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case <-time.After(3 * time.Second):
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log.Fatalf("Timeout waiting for Ctrl+Break\n")
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}
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}
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`
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tmp, err := ioutil.TempDir("", "TestCtrlBreak")
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if err != nil {
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t.Fatal("TempDir failed: ", err)
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}
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defer os.RemoveAll(tmp)
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// write ctrlbreak.go
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name := filepath.Join(tmp, "ctlbreak")
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src := name + ".go"
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f, err := os.Create(src)
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if err != nil {
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t.Fatalf("Failed to create %v: %v", src, err)
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}
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defer f.Close()
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f.Write([]byte(source))
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// compile it
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exe := name + ".exe"
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defer os.Remove(exe)
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o, err := exec.Command(testenv.GoToolPath(t), "build", "-o", exe, src).CombinedOutput()
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if err != nil {
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t.Fatalf("Failed to compile: %v\n%v", err, string(o))
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}
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// run it
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cmd := exec.Command(exe)
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var b bytes.Buffer
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cmd.Stdout = &b
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cmd.Stderr = &b
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cmd.SysProcAttr = &syscall.SysProcAttr{
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CreationFlags: syscall.CREATE_NEW_PROCESS_GROUP,
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}
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err = cmd.Start()
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if err != nil {
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t.Fatalf("Start failed: %v", err)
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}
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go func() {
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time.Sleep(1 * time.Second)
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sendCtrlBreak(t, cmd.Process.Pid)
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}()
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err = cmd.Wait()
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if err != nil {
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t.Fatalf("Program exited with error: %v\n%v", err, string(b.Bytes()))
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}
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}
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