1// Copyright 2012 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 5// Test that setgid does not hang on Linux. 6// See https://golang.org/issue/3871 for details. 7 8package cgotest 9 10/* 11#include <sys/types.h> 12#include <unistd.h> 13*/ 14import "C" 15 16import ( 17 "os" 18 "os/signal" 19 "syscall" 20 "testing" 21 "time" 22) 23 24func runTestSetgid() bool { 25 c := make(chan bool) 26 go func() { 27 C.setgid(0) 28 c <- true 29 }() 30 select { 31 case <-c: 32 return true 33 case <-time.After(5 * time.Second): 34 return false 35 } 36 37} 38 39func testSetgid(t *testing.T) { 40 if !runTestSetgid() { 41 t.Error("setgid hung") 42 } 43 44 // Now try it again after using signal.Notify. 45 signal.Notify(make(chan os.Signal, 1), syscall.SIGINT) 46 if !runTestSetgid() { 47 t.Error("setgid hung after signal.Notify") 48 } 49} 50