xref: /third_party/curl/lib/nonblock.c (revision 13498266) 
1/***************************************************************************
2 *                                  _   _ ____  _
3 *  Project                     ___| | | |  _ \| |
4 *                             / __| | | | |_) | |
5 *                            | (__| |_| |  _ <| |___
6 *                             \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
9 *
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at https://curl.se/docs/copyright.html.
13 *
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
17 *
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
20 *
21 * SPDX-License-Identifier: curl
22 *
23 ***************************************************************************/
24
25#include "curl_setup.h"
26
27#ifdef HAVE_SYS_IOCTL_H
28#include <sys/ioctl.h>
29#endif
30#ifdef HAVE_FCNTL_H
31#include <fcntl.h>
32#endif
33
34#ifdef __VMS
35#include <in.h>
36#include <inet.h>
37#endif
38
39#include "nonblock.h"
40
41/*
42 * curlx_nonblock() set the given socket to either blocking or non-blocking
43 * mode based on the 'nonblock' boolean argument. This function is highly
44 * portable.
45 */
46int curlx_nonblock(curl_socket_t sockfd,    /* operate on this */
47                   int nonblock   /* TRUE or FALSE */)
48{
49#if defined(HAVE_FCNTL_O_NONBLOCK)
50  /* most recent unix versions */
51  int flags;
52  flags = sfcntl(sockfd, F_GETFL, 0);
53  if(nonblock)
54    return sfcntl(sockfd, F_SETFL, flags | O_NONBLOCK);
55  return sfcntl(sockfd, F_SETFL, flags & (~O_NONBLOCK));
56
57#elif defined(HAVE_IOCTL_FIONBIO)
58
59  /* older unix versions */
60  int flags = nonblock ? 1 : 0;
61  return ioctl(sockfd, FIONBIO, &flags);
62
63#elif defined(HAVE_IOCTLSOCKET_FIONBIO)
64
65  /* Windows */
66  unsigned long flags = nonblock ? 1UL : 0UL;
67  return ioctlsocket(sockfd, FIONBIO, &flags);
68
69#elif defined(HAVE_IOCTLSOCKET_CAMEL_FIONBIO)
70
71  /* Amiga */
72  long flags = nonblock ? 1L : 0L;
73  return IoctlSocket(sockfd, FIONBIO, (char *)&flags);
74
75#elif defined(HAVE_SETSOCKOPT_SO_NONBLOCK)
76
77  /* Orbis OS */
78  long b = nonblock ? 1L : 0L;
79  return setsockopt(sockfd, SOL_SOCKET, SO_NONBLOCK, &b, sizeof(b));
80
81#else
82#  error "no non-blocking method was found/used/set"
83#endif
84}
85