libgo/go/net/sys_cloexec.go

   1 // Copyright 2013 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 // This file implements sysSocket and accept for platforms that do not
   6 // provide a fast path for setting SetNonblock and CloseOnExec.
   7
   8 // +build aix darwin nacl solaris
   9
  10 package net
  11
  12 import (
  13         "internal/poll"
  14         "os"
  15         "syscall"
  16 )
  17
  18 // Wrapper around the socket system call that marks the returned file
  19 // descriptor as nonblocking and close-on-exec.
  20 func sysSocket(family, sotype, proto int) (int, error) {
  21         // See ../syscall/exec_unix.go for description of ForkLock.
  22         syscall.ForkLock.RLock()
  23         s, err := socketFunc(family, sotype, proto)
  24         if err == nil {
  25                 syscall.CloseOnExec(s)
  26         }
  27         syscall.ForkLock.RUnlock()
  28         if err != nil {
  29                 return -1, os.NewSyscallError("socket", err)
  30         }
  31         if err = syscall.SetNonblock(s, true); err != nil {
  32                 poll.CloseFunc(s)
  33                 return -1, os.NewSyscallError("setnonblock", err)
  34         }
  35         return s, nil
  36 }