/src/PROJ/curl/lib/curlx/nonblock.c
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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 | | */ |
46 | | int curlx_nonblock(curl_socket_t sockfd, /* operate on this */ |
47 | | int nonblock /* TRUE or FALSE */) |
48 | 0 | { |
49 | 0 | #if defined(HAVE_FCNTL_O_NONBLOCK) |
50 | | /* most recent Unix versions */ |
51 | 0 | int flags; |
52 | 0 | flags = sfcntl(sockfd, F_GETFL, 0); |
53 | 0 | if(flags < 0) |
54 | 0 | 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 | 0 | if(!!(flags & O_NONBLOCK) == !!nonblock) |
59 | 0 | return 0; |
60 | 0 | if(nonblock) |
61 | 0 | flags |= O_NONBLOCK; |
62 | 0 | else |
63 | 0 | flags &= ~O_NONBLOCK; |
64 | 0 | return sfcntl(sockfd, F_SETFL, flags); |
65 | |
|
66 | | #elif defined(HAVE_IOCTLSOCKET_CAMEL_FIONBIO) |
67 | | |
68 | | /* Amiga */ |
69 | | long flags = nonblock ? 1L : 0L; |
70 | | return IoctlSocket(sockfd, FIONBIO, (char *)&flags); |
71 | | |
72 | | #elif defined(HAVE_IOCTL_FIONBIO) |
73 | | |
74 | | /* older Unix versions */ |
75 | | int flags = nonblock ? 1 : 0; |
76 | | return ioctl(sockfd, FIONBIO, &flags); |
77 | | |
78 | | #elif defined(HAVE_IOCTLSOCKET_FIONBIO) |
79 | | |
80 | | /* Windows */ |
81 | | unsigned long flags = nonblock ? 1UL : 0UL; |
82 | | return ioctlsocket(sockfd, (long)FIONBIO, &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 | 0 | } |