sys/recvfrom.c

   1 /*
   2  * Copyright (c) 2006 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 /*
  24  * We need conformance on so that EOPNOTSUPP=102.  But the routine symbol
  25  * will still be the legacy (undecorated) one.
  26  */
  27 #undef __DARWIN_UNIX03
  28 #define __DARWIN_UNIX03         1
  29
  30 #include <sys/socket.h>
  31 #include <errno.h>
  32
  33 ssize_t __recvfrom_nocancel(int, void *, size_t, int, struct sockaddr * __restrict, socklen_t * __restrict);
  34
  35 /*
  36  * recvfrom stub, legacy version
  37  */
  38 ssize_t
  39 recvfrom(int s, void *buf, size_t len, int flags, struct sockaddr * __restrict from, socklen_t * __restrict fromlen)
  40 {
  41         int ret = __recvfrom_nocancel(s, buf, len, flags, from, fromlen);
  42
  43         /* use ENOTSUP for legacy behavior */
  44         if (ret < 0 && errno == EOPNOTSUPP)
  45                 errno = ENOTSUP;
  46         return ret;
  47 }