/src/PROJ/curl/lib/sigpipe.h
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1 | | #ifndef HEADER_CURL_SIGPIPE_H |
2 | | #define HEADER_CURL_SIGPIPE_H |
3 | | /*************************************************************************** |
4 | | * _ _ ____ _ |
5 | | * Project ___| | | | _ \| | |
6 | | * / __| | | | |_) | | |
7 | | * | (__| |_| | _ <| |___ |
8 | | * \___|\___/|_| \_\_____| |
9 | | * |
10 | | * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al. |
11 | | * |
12 | | * This software is licensed as described in the file COPYING, which |
13 | | * you should have received as part of this distribution. The terms |
14 | | * are also available at https://curl.se/docs/copyright.html. |
15 | | * |
16 | | * You may opt to use, copy, modify, merge, publish, distribute and/or sell |
17 | | * copies of the Software, and permit persons to whom the Software is |
18 | | * furnished to do so, under the terms of the COPYING file. |
19 | | * |
20 | | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY |
21 | | * KIND, either express or implied. |
22 | | * |
23 | | * SPDX-License-Identifier: curl |
24 | | * |
25 | | ***************************************************************************/ |
26 | | #include "curl_setup.h" |
27 | | |
28 | | #if defined(HAVE_SIGACTION) && \ |
29 | | (defined(USE_OPENSSL) || defined(USE_MBEDTLS) || defined(USE_WOLFSSL)) |
30 | | #include <signal.h> |
31 | | |
32 | | struct sigpipe_ignore { |
33 | | struct sigaction old_pipe_act; |
34 | | bool no_signal; |
35 | | }; |
36 | | |
37 | 0 | #define SIGPIPE_VARIABLE(x) struct sigpipe_ignore x |
38 | | |
39 | | /* |
40 | | * sigpipe_ignore() makes sure we ignore SIGPIPE while running libcurl |
41 | | * internals, and then sigpipe_restore() will restore the situation when we |
42 | | * return from libcurl again. |
43 | | */ |
44 | | static void sigpipe_ignore(struct Curl_easy *data, |
45 | | struct sigpipe_ignore *ig) |
46 | 0 | { |
47 | | /* get a local copy of no_signal because the Curl_easy might not be |
48 | | around when we restore */ |
49 | 0 | ig->no_signal = data->set.no_signal; |
50 | 0 | if(!data->set.no_signal) { |
51 | 0 | struct sigaction action; |
52 | | /* first, extract the existing situation */ |
53 | 0 | sigaction(SIGPIPE, NULL, &ig->old_pipe_act); |
54 | 0 | action = ig->old_pipe_act; |
55 | | /* ignore this signal */ |
56 | 0 | action.sa_handler = SIG_IGN; |
57 | 0 | sigaction(SIGPIPE, &action, NULL); |
58 | 0 | } |
59 | 0 | } Unexecuted instantiation: easy.c:sigpipe_ignore Unexecuted instantiation: multi.c:sigpipe_ignore Unexecuted instantiation: conncache.c:sigpipe_ignore |
60 | | |
61 | | /* |
62 | | * sigpipe_restore() puts back the outside world's opinion of signal handler |
63 | | * and SIGPIPE handling. It MUST only be called after a corresponding |
64 | | * sigpipe_ignore() was used. |
65 | | */ |
66 | | static void sigpipe_restore(struct sigpipe_ignore *ig) |
67 | 0 | { |
68 | 0 | if(!ig->no_signal) |
69 | | /* restore the outside state */ |
70 | 0 | sigaction(SIGPIPE, &ig->old_pipe_act, NULL); |
71 | 0 | } Unexecuted instantiation: easy.c:sigpipe_restore Unexecuted instantiation: multi.c:sigpipe_restore Unexecuted instantiation: conncache.c:sigpipe_restore |
72 | | |
73 | | #else |
74 | | /* for systems without sigaction */ |
75 | | #define sigpipe_ignore(x,y) Curl_nop_stmt |
76 | | #define sigpipe_restore(x) Curl_nop_stmt |
77 | | #define SIGPIPE_VARIABLE(x) |
78 | | #endif |
79 | | |
80 | | #endif /* HEADER_CURL_SIGPIPE_H */ |