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87168807b2
Enable eventfd code consistently when both `HAVE_EVENTFD` and `HAVE_SYS_EVENTFD_H` macros are defined. Before this patch `HAVE_EVENTFD` guarded it alone, though the code also required the header, which was guarded by `HAVE_SYS_EVENTFD_H`. These should normally be detected in pairs. When they aren't, omit using `eventfd()` to avoid calling it without a known matching header. If this disables valid cases (e.g. some system declares this function via a different header), feature detection and the code may be extended for those cases. If these are known to come in pairs, always, another option is detect them both at build stage, and forward a single macro to C. Reported-by: Abhinav Singhal Bug: https://curl.se/mail/lib-2025-04/0000.html Closes #16909
82 lines
2.4 KiB
C
82 lines
2.4 KiB
C
#ifndef HEADER_CURL_SOCKETPAIR_H
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#define HEADER_CURL_SOCKETPAIR_H
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/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at https://curl.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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* SPDX-License-Identifier: curl
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*
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***************************************************************************/
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#include "curl_setup.h"
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#ifdef USE_EVENTFD
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#define wakeup_write write
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#define wakeup_read read
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#define wakeup_close close
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#define wakeup_create(p,nb) Curl_eventfd(p,nb)
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#include <curl/curl.h>
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int Curl_eventfd(curl_socket_t socks[2], bool nonblocking);
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#elif defined(HAVE_PIPE)
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#define wakeup_write write
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#define wakeup_read read
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#define wakeup_close close
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#define wakeup_create(p,nb) Curl_pipe(p,nb)
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#include <curl/curl.h>
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int Curl_pipe(curl_socket_t socks[2], bool nonblocking);
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#else /* !USE_EVENTFD && !HAVE_PIPE */
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#define wakeup_write swrite
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#define wakeup_read sread
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#define wakeup_close sclose
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#if defined(USE_UNIX_SOCKETS) && defined(HAVE_SOCKETPAIR)
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#define SOCKETPAIR_FAMILY AF_UNIX
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#elif !defined(HAVE_SOCKETPAIR)
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#define SOCKETPAIR_FAMILY 0 /* not used */
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#else
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#error "unsupported Unix domain and socketpair build combo"
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#endif
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#ifdef SOCK_CLOEXEC
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#define SOCKETPAIR_TYPE (SOCK_STREAM | SOCK_CLOEXEC)
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#else
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#define SOCKETPAIR_TYPE SOCK_STREAM
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#endif
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#define wakeup_create(p,nb)\
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Curl_socketpair(SOCKETPAIR_FAMILY, SOCKETPAIR_TYPE, 0, p, nb)
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#endif /* USE_EVENTFD */
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#ifndef CURL_DISABLE_SOCKETPAIR
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#include <curl/curl.h>
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int Curl_socketpair(int domain, int type, int protocol,
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curl_socket_t socks[2], bool nonblocking);
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#endif
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#endif /* HEADER_CURL_SOCKETPAIR_H */
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