mirror of
https://github.com/curl/curl.git
synced 2024-12-27 06:59:43 +08:00
96c29900bc
Delete checks and guards for standard C89 headers and assume these are
available: `stdio.h`, `string.h`, `time.h`, `setjmp.h`, `stdlib.h`,
`stddef.h`, `signal.h`.
Some of these we already used unconditionally, some others we only used
for feature checks.
Follow-up to 9c7165e96a #11918 (for `stdio.h` in CMake)
Closes #11940
81 lines
2.6 KiB
C
81 lines
2.6 KiB
C
#ifndef HEADER_CURL_SIGPIPE_H
|
|
#define HEADER_CURL_SIGPIPE_H
|
|
/***************************************************************************
|
|
* _ _ ____ _
|
|
* Project ___| | | | _ \| |
|
|
* / __| | | | |_) | |
|
|
* | (__| |_| | _ <| |___
|
|
* \___|\___/|_| \_\_____|
|
|
*
|
|
* Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
|
|
*
|
|
* This software is licensed as described in the file COPYING, which
|
|
* you should have received as part of this distribution. The terms
|
|
* are also available at https://curl.se/docs/copyright.html.
|
|
*
|
|
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
|
|
* copies of the Software, and permit persons to whom the Software is
|
|
* furnished to do so, under the terms of the COPYING file.
|
|
*
|
|
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
|
* KIND, either express or implied.
|
|
*
|
|
* SPDX-License-Identifier: curl
|
|
*
|
|
***************************************************************************/
|
|
#include "curl_setup.h"
|
|
|
|
#if defined(HAVE_SIGACTION) && \
|
|
(defined(USE_OPENSSL) || defined(USE_MBEDTLS) || defined(USE_WOLFSSL))
|
|
#include <signal.h>
|
|
|
|
struct sigpipe_ignore {
|
|
struct sigaction old_pipe_act;
|
|
bool no_signal;
|
|
};
|
|
|
|
#define SIGPIPE_VARIABLE(x) struct sigpipe_ignore x
|
|
|
|
/*
|
|
* sigpipe_ignore() makes sure we ignore SIGPIPE while running libcurl
|
|
* internals, and then sigpipe_restore() will restore the situation when we
|
|
* return from libcurl again.
|
|
*/
|
|
static void sigpipe_ignore(struct Curl_easy *data,
|
|
struct sigpipe_ignore *ig)
|
|
{
|
|
/* get a local copy of no_signal because the Curl_easy might not be
|
|
around when we restore */
|
|
ig->no_signal = data->set.no_signal;
|
|
if(!data->set.no_signal) {
|
|
struct sigaction action;
|
|
/* first, extract the existing situation */
|
|
sigaction(SIGPIPE, NULL, &ig->old_pipe_act);
|
|
action = ig->old_pipe_act;
|
|
/* ignore this signal */
|
|
action.sa_handler = SIG_IGN;
|
|
sigaction(SIGPIPE, &action, NULL);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* sigpipe_restore() puts back the outside world's opinion of signal handler
|
|
* and SIGPIPE handling. It MUST only be called after a corresponding
|
|
* sigpipe_ignore() was used.
|
|
*/
|
|
static void sigpipe_restore(struct sigpipe_ignore *ig)
|
|
{
|
|
if(!ig->no_signal)
|
|
/* restore the outside state */
|
|
sigaction(SIGPIPE, &ig->old_pipe_act, NULL);
|
|
}
|
|
|
|
#else
|
|
/* for systems without sigaction */
|
|
#define sigpipe_ignore(x,y) Curl_nop_stmt
|
|
#define sigpipe_restore(x) Curl_nop_stmt
|
|
#define SIGPIPE_VARIABLE(x)
|
|
#endif
|
|
|
|
#endif /* HEADER_CURL_SIGPIPE_H */
|