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 */
curlx_nonblock(curl_socket_t sockfd,int nonblock)46 int 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(flags < 0)
54 return -1;
55 /* Check if the current file status flags have already satisfied
56 * the request, if so, it is no need to call fcntl() to replicate it.
57 */
58 if(!!(flags & O_NONBLOCK) == !!nonblock)
59 return 0;
60 if(nonblock)
61 flags |= O_NONBLOCK;
62 else
63 flags &= ~O_NONBLOCK;
64 return sfcntl(sockfd, F_SETFL, flags);
65
66 #elif defined(HAVE_IOCTL_FIONBIO)
67
68 /* older Unix versions */
69 int flags = nonblock ? 1 : 0;
70 return ioctl(sockfd, FIONBIO, &flags);
71
72 #elif defined(HAVE_IOCTLSOCKET_FIONBIO)
73
74 /* Windows */
75 unsigned long flags = nonblock ? 1UL : 0UL;
76 return ioctlsocket(sockfd, (long)FIONBIO, &flags);
77
78 #elif defined(HAVE_IOCTLSOCKET_CAMEL_FIONBIO)
79
80 /* Amiga */
81 long flags = nonblock ? 1L : 0L;
82 return IoctlSocket(sockfd, FIONBIO, (char *)&flags);
83
84 #elif defined(HAVE_SETSOCKOPT_SO_NONBLOCK)
85
86 /* Orbis OS */
87 long b = nonblock ? 1L : 0L;
88 return setsockopt(sockfd, SOL_SOCKET, SO_NONBLOCK, &b, sizeof(b));
89
90 #else
91 # error "no non-blocking method was found/used/set"
92 #endif
93 }
94
