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annotate mupdf-source/thirdparty/curl/lib/sigpipe.h @ 2:b50eed0cc0ef upstream

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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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1 #ifndef HEADER_CURL_SIGPIPE_H
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2 #define HEADER_CURL_SIGPIPE_H
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3 /***************************************************************************
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4 * _ _ ____ _
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5 * Project ___| | | | _ \| |
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6 * / __| | | | |_) | |
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7 * | (__| |_| | _ <| |___
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8 * \___|\___/|_| \_\_____|
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9 *
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10 * Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
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11 *
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12 * This software is licensed as described in the file COPYING, which
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13 * you should have received as part of this distribution. The terms
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14 * are also available at https://curl.haxx.se/docs/copyright.html.
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15 *
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16 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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17 * copies of the Software, and permit persons to whom the Software is
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18 * furnished to do so, under the terms of the COPYING file.
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19 *
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20 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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21 * KIND, either express or implied.
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22 *
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23 ***************************************************************************/
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24 #include "curl_setup.h"
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26 #if defined(HAVE_SIGNAL_H) && defined(HAVE_SIGACTION) && \
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27 (defined(USE_OPENSSL) || defined(USE_MBEDTLS))
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28 #include <signal.h>
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30 struct sigpipe_ignore {
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31 struct sigaction old_pipe_act;
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32 bool no_signal;
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33 };
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34
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35 #define SIGPIPE_VARIABLE(x) struct sigpipe_ignore x
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37 /*
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38 * sigpipe_ignore() makes sure we ignore SIGPIPE while running libcurl
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39 * internals, and then sigpipe_restore() will restore the situation when we
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40 * return from libcurl again.
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41 */
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42 static void sigpipe_ignore(struct Curl_easy *data,
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43 struct sigpipe_ignore *ig)
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44 {
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45 /* get a local copy of no_signal because the Curl_easy might not be
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46 around when we restore */
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47 ig->no_signal = data->set.no_signal;
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48 if(!data->set.no_signal) {
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49 struct sigaction action;
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50 /* first, extract the existing situation */
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51 memset(&ig->old_pipe_act, 0, sizeof(struct sigaction));
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52 sigaction(SIGPIPE, NULL, &ig->old_pipe_act);
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53 action = ig->old_pipe_act;
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54 /* ignore this signal */
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55 action.sa_handler = SIG_IGN;
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56 sigaction(SIGPIPE, &action, NULL);
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57 }
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58 }
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59
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60 /*
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61 * sigpipe_restore() puts back the outside world's opinion of signal handler
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62 * and SIGPIPE handling. It MUST only be called after a corresponding
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63 * sigpipe_ignore() was used.
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64 */
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65 static void sigpipe_restore(struct sigpipe_ignore *ig)
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66 {
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67 if(!ig->no_signal)
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68 /* restore the outside state */
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69 sigaction(SIGPIPE, &ig->old_pipe_act, NULL);
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70 }
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71
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72 #else
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73 /* for systems without sigaction */
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74 #define sigpipe_ignore(x,y) Curl_nop_stmt
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75 #define sigpipe_restore(x) Curl_nop_stmt
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76 #define SIGPIPE_VARIABLE(x)
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77 #endif
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78
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79 #endif /* HEADER_CURL_SIGPIPE_H */