From 1f3575f38ca1321e0c5d71217cfb46f8efc35caa Mon Sep 17 00:00:00 2001
From: Peter Eisentraut <peter@eisentraut.org>
Date: Wed, 7 Aug 2019 15:44:19 +0200
Subject: [PATCH 1/5] Enable Unix-domain sockets support on Windows

As of Windows 10 version 1803, Unix-domain sockets are supported on
Windows.  But it's not automatically detected by configure because it
looks for struct sockaddr_un and Windows doesn't define that.  So we
just make our own definition on Windows and override the configure
result.
---
 config/c-library.m4            |  5 +++--
 configure                      |  5 ++++-
 src/include/c.h                | 11 +++++++++++
 src/include/pg_config.h.in     |  6 +++---
 src/include/pg_config.h.win32  |  6 +++---
 src/include/pg_config_manual.h |  7 -------
 6 files changed, 24 insertions(+), 16 deletions(-)

diff --git a/config/c-library.m4 b/config/c-library.m4
index 6f2b0fbb4e..1469b07d2f 100644
--- a/config/c-library.m4
+++ b/config/c-library.m4
@@ -121,10 +121,11 @@ AC_DEFUN([PGAC_UNION_SEMUN],
 
 # PGAC_STRUCT_SOCKADDR_UN
 # -----------------------
-# If `struct sockaddr_un' exists, define HAVE_UNIX_SOCKETS.
+# If `struct sockaddr_un' exists, define HAVE_STRUCT_SOCKADDR_UN.
+# If it is missing then one could define it.
 # (Requires test for <sys/un.h>!)
 AC_DEFUN([PGAC_STRUCT_SOCKADDR_UN],
-[AC_CHECK_TYPE([struct sockaddr_un], [AC_DEFINE(HAVE_UNIX_SOCKETS, 1, [Define to 1 if you have unix sockets.])], [],
+[AC_CHECK_TYPES([struct sockaddr_un], [], [],
 [#include <sys/types.h>
 #ifdef HAVE_SYS_UN_H
 #include <sys/un.h>
diff --git a/configure b/configure
index 7a6bfc2339..6e87537be3 100755
--- a/configure
+++ b/configure
@@ -14135,7 +14135,10 @@ ac_fn_c_check_type "$LINENO" "struct sockaddr_un" "ac_cv_type_struct_sockaddr_un
 "
 if test "x$ac_cv_type_struct_sockaddr_un" = xyes; then :
 
-$as_echo "#define HAVE_UNIX_SOCKETS 1" >>confdefs.h
+cat >>confdefs.h <<_ACEOF
+#define HAVE_STRUCT_SOCKADDR_UN 1
+_ACEOF
+
 
 fi
 
diff --git a/src/include/c.h b/src/include/c.h
index 2a082afab1..434c403269 100644
--- a/src/include/c.h
+++ b/src/include/c.h
@@ -1263,6 +1263,17 @@ extern unsigned long long strtoull(const char *str, char **endptr, int base);
 #define NON_EXEC_STATIC static
 #endif
 
+#ifdef HAVE_STRUCT_SOCKADDR_UN
+#define HAVE_UNIX_SOCKETS 1
+#elif defined(WIN32)
+struct sockaddr_un
+{
+	unsigned short sun_family;
+	char sun_path[108];
+};
+#define HAVE_UNIX_SOCKETS 1
+#endif
+
 /* /port compatibility functions */
 #include "port.h"
 
diff --git a/src/include/pg_config.h.in b/src/include/pg_config.h.in
index 512213aa32..e75c090f85 100644
--- a/src/include/pg_config.h.in
+++ b/src/include/pg_config.h.in
@@ -594,6 +594,9 @@
 /* Define to 1 if `__ss_len' is a member of `struct sockaddr_storage'. */
 #undef HAVE_STRUCT_SOCKADDR_STORAGE___SS_LEN
 
+/* Define to 1 if the system has the type `struct sockaddr_un'. */
+#undef HAVE_STRUCT_SOCKADDR_UN
+
 /* Define to 1 if `tm_zone' is a member of `struct tm'. */
 #undef HAVE_STRUCT_TM_TM_ZONE
 
@@ -682,9 +685,6 @@
 /* Define to 1 if you have the <unistd.h> header file. */
 #undef HAVE_UNISTD_H
 
-/* Define to 1 if you have unix sockets. */
-#undef HAVE_UNIX_SOCKETS
-
 /* Define to 1 if you have the `unsetenv' function. */
 #undef HAVE_UNSETENV
 
diff --git a/src/include/pg_config.h.win32 b/src/include/pg_config.h.win32
index 2d903c82b8..b947a9fbde 100644
--- a/src/include/pg_config.h.win32
+++ b/src/include/pg_config.h.win32
@@ -463,6 +463,9 @@
 /* Define to 1 if `__ss_len' is member of `struct sockaddr_storage'. */
 /* #undef HAVE_STRUCT_SOCKADDR_STORAGE___SS_LEN */
 
+/* Define to 1 if the system has the type `struct sockaddr_un'. */
+/* #undef HAVE_STRUCT_SOCKADDR_UN */
+
 /* Define to 1 if `tm_zone' is member of `struct tm'. */
 /* #undef HAVE_STRUCT_TM_TM_ZONE */
 
@@ -530,9 +533,6 @@
 /* Define to 1 if you have the <unistd.h> header file. */
 #define HAVE_UNISTD_H 1
 
-/* Define to 1 if you have unix sockets. */
-/* #undef HAVE_UNIX_SOCKETS */
-
 /* Define to 1 if you have the `unsetenv' function. */
 /* #undef HAVE_UNSETENV */
 
diff --git a/src/include/pg_config_manual.h b/src/include/pg_config_manual.h
index 743401cb96..65d20d44b3 100644
--- a/src/include/pg_config_manual.h
+++ b/src/include/pg_config_manual.h
@@ -109,13 +109,6 @@
  */
 #define ALIGNOF_BUFFER	32
 
-/*
- * Disable UNIX sockets for certain operating systems.
- */
-#if defined(WIN32)
-#undef HAVE_UNIX_SOCKETS
-#endif
-
 /*
  * Define this if your operating system supports link()
  */
-- 
2.22.0