package main

import (
	"fmt"
	"os"
	"os/exec"
	"os/signal"
	"sync"
	"syscall"
	"time"
)

func init() {
	register("SignalDuringExec", SignalDuringExec)
	register("Nop", Nop)
}

func SignalDuringExec() {
	pgrp := syscall.Getpgrp()

	const tries = 10

	var wg sync.WaitGroup
	c := make(chan os.Signal, tries)
	signal.Notify(c, syscall.SIGWINCH)
	wg.Add(1)

	switch runtime.GOOS {
	case "darwin", "dragonfly", "freebsd", "linux", "netbsd", "openbsd":
	default:
		t.Skipf("skipping test on %s", runtime.GOOS)
	}
	output := runTestProg(t, "testprognet", "SignalDuringExec")
	want := "OK\n"
	if output != want {
		t.Fatalf("want %s, got %s\n", want, output)
	}
}

func TestSignalM(t *testing.T) {
	r, w, errno := runtime.Pipe()
	if errno != 0 {