libgo/misc/cgo/test/setgid_linux.go

   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 GNU/Linux.
   6 // See https://golang.org/issue/3871 for details.
   7
   8 package cgotest
   9
  10 /*
  11 #include <sys/types.h>
  12 #include <unistd.h>
  13 */
  14 import "C"
  15
  16 import (
  17         "os"
  18         "os/signal"
  19         "syscall"
  20         "testing"
  21         "time"
  22 )
  23
  24 func 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
  39 func 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 }