libgo/go/syscall/sock_cloexec_linux.go

   1 // Copyright 2019 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 package syscall
   6
   7 // This is a stripped down version of sysSocket from net/sock_cloexec.go.
   8 func cloexecSocket(family, sotype, proto int) (int, error) {
   9         s, err := Socket(family, sotype|SOCK_CLOEXEC, proto)
  10         switch err {
  11         case nil:
  12                 return s, nil
  13         default:
  14                 return -1, err
  15         case EINVAL:
  16         }
  17
  18         ForkLock.RLock()
  19         s, err = Socket(family, sotype, proto)
  20         if err == nil {
  21                 CloseOnExec(s)
  22         }
  23         ForkLock.RUnlock()
  24         if err != nil {
  25                 Close(s)
  26                 return -1, err
  27         }
  28         return s, nil
  29 }