--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/curl/lib/sigpipe.h	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,79 @@
+#ifndef HEADER_CURL_SIGPIPE_H
+#define HEADER_CURL_SIGPIPE_H
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2019, 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.haxx.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.
+ *
+ ***************************************************************************/
+#include "curl_setup.h"
+
+#if defined(HAVE_SIGNAL_H) && defined(HAVE_SIGACTION) &&        \
+  (defined(USE_OPENSSL) || defined(USE_MBEDTLS))
+#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 */
+    memset(&ig->old_pipe_act, 0, sizeof(struct sigaction));
+    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 */