Add a check for EINTR to accept() calls.

utilities/network_utilities.c

@@ -0,0 +1,47 @@
+/*
+ * Network Utilities. This file is part of Shairport Sync.
+ * Copyright (c) Mike Brady 2014--2025
+ * All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <errno.h>
+#include <string.h>
+#include "network_utilities.h"
+
+int eintr_checked_accept(int sockfd, struct sockaddr *addr,
+                  socklen_t *addrlen) {
+  int response;
+  do {
+    response =  accept(sockfd, addr, addrlen);
+    
+    if (response == -1) {
+      char errorstring[1024];
+      strerror_r(errno, (char *)errorstring, sizeof(errorstring));
+      debug(1,
+        "error %d accept()ing a socketin ap2_event_receiver %d: \"%s\". Error %d is ignored.",
+        errno, errorstring, EINTR);
+    }
+    
+  } while((response == -1) && (errno == EINTR));
+  return response;
+}

utilities/network_utilities.h

@@ -0,0 +1,10 @@
+#ifndef _NETWORK_UTILITIES_H
+#define _NETWORK_UTILITIES_H
+
+#include <sys/socket.h>
+
+#define restrict
+
+int eintr_checked_accept(int sockfd, struct sockaddr *addr,
+                  socklen_t *addrlen);
+#endif // _NETWORK_UTILITIES_H