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 js,wasm nacl solaris 9 10 package poll 11 12 import ( 13 "syscall" 14 ) 15 16 // Wrapper around the accept system call that marks the returned file 17 // descriptor as nonblocking and close-on-exec. 18 func accept(s int) (int, syscall.Sockaddr, string, error) { 19 // See ../syscall/exec_unix.go for description of ForkLock. 20 // It is probably okay to hold the lock across syscall.Accept 21 // because we have put fd.sysfd into non-blocking mode. 22 // However, a call to the File method will put it back into 23 // blocking mode. We can't take that risk, so no use of ForkLock here. 24 ns, sa, err := AcceptFunc(s) 25 if err == nil { 26 syscall.CloseOnExec(ns) 27 } 28 if err != nil { 29 return -1, nil, "accept", err 30 } 31 if err = syscall.SetNonblock(ns, true); err != nil { 32 CloseFunc(ns) 33 return -1, nil, "setnonblock", err 34 } 35 return ns, sa, "", nil 36 } 37