From da11217544727cda01a23db2198d24a591d993a3 Mon Sep 17 00:00:00 2001
From: Azat Khuzhin <azat@libevent.org>
Date: Sun, 12 May 2019 16:12:06 +0300
Subject: [PATCH] build: struct sockaddr_un detection (sys/un.h, afunix.h)

- On UNIX:     sys/un.h
- Since win10: afunix.h

And windows has AF_UNIX but do not have sockaddr_un (before windows
build 17061 [1]), hence the sockaddr_un detection.

  [1]: https://devblogs.microsoft.com/commandline/af_unix-comes-to-windows/
---
 CMakeLists.txt       | 13 +++++++++++++
 configure.ac         |  6 +++++-
 event-config.h.cmake |  9 +++++++++
 3 files changed, 27 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index aecff467..fd3375bc 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -357,6 +357,19 @@ if(EVENT__HAVE_NETINET_IN_H)
     list(APPEND CMAKE_EXTRA_INCLUDE_FILES netinet/in.h)
 endif()
 
+CHECK_INCLUDE_FILE(sys/un.h EVENT__HAVE_SYS_UN_H)
+if(EVENT__HAVE_SYS_UN_H)
+    list(APPEND CMAKE_EXTRA_INCLUDE_FILES sys/un.h)
+endif()
+
+if(WIN32)
+    CHECK_INCLUDE_FILE(afunix.h EVENT__HAVE_AFUNIX_H)
+    if(EVENT__HAVE_AFUNIX_H)
+        list(APPEND CMAKE_EXTRA_INCLUDE_FILES afunix.h)
+    endif()
+endif()
+CHECK_TYPE_SIZE("struct sockaddr_un" EVENT__HAVE_STRUCT_SOCKADDR_UN)
+
 CHECK_INCLUDE_FILE(netinet/in6.h EVENT__HAVE_NETINET_IN6_H)
 if(EVENT__HAVE_NETINET_IN6_H)
     list(APPEND CMAKE_EXTRA_INCLUDE_FILES netinet/in6.h)
diff --git a/configure.ac b/configure.ac
index b68a0acb..4c17e553 100644
--- a/configure.ac
+++ b/configure.ac
@@ -230,6 +230,7 @@ AC_CHECK_HEADERS([ \
   netinet/in.h \
   netinet/in6.h \
   netinet/tcp.h \
+  sys/un.h \
   poll.h \
   port.h \
   stdarg.h \
@@ -667,7 +668,7 @@ AC_CHECK_SIZEOF(void *)
 AC_CHECK_SIZEOF(off_t)
 AC_CHECK_SIZEOF(time_t)
 
-AC_CHECK_TYPES([struct in6_addr, struct sockaddr_in6, sa_family_t, struct addrinfo, struct sockaddr_storage], , ,
+AC_CHECK_TYPES([struct in6_addr, struct sockaddr_in6, struct sockaddr_un, sa_family_t, struct addrinfo, struct sockaddr_storage], , ,
 [#define _GNU_SOURCE 1
 #include <sys/types.h>
 #ifdef HAVE_NETINET_IN_H
@@ -676,6 +677,9 @@ AC_CHECK_TYPES([struct in6_addr, struct sockaddr_in6, sa_family_t, struct addrin
 #ifdef HAVE_NETINET_IN6_H
 #include <netinet/in6.h>
 #endif
+#ifdef HAVE_SYS_UN_H
+#include <sys/un.h>
+#endif
 #ifdef HAVE_SYS_SOCKET_H
 #include <sys/socket.h>
 #endif
diff --git a/event-config.h.cmake b/event-config.h.cmake
index c13128a0..a1b39a11 100644
--- a/event-config.h.cmake
+++ b/event-config.h.cmake
@@ -202,6 +202,12 @@
 /* Define to 1 if you have the <netinet/tcp.h> header file. */
 #cmakedefine EVENT__HAVE_NETINET_TCP_H 1
 
+/* Define to 1 if you have the <sys/un.h> header file. */
+#cmakedefine EVENT__HAVE_SYS_UN_H 1
+
+/* Define to 1 if you have the <afunix.h> header file. */
+#cmakedefine EVENT__HAVE_AFUNIX_H 1
+
 /* Define if the system has openssl */
 #cmakedefine EVENT__HAVE_OPENSSL 1
 
@@ -310,6 +316,9 @@
 /* Define to 1 if `sin_len' is member of `struct sockaddr_in'. */
 #cmakedefine EVENT__HAVE_STRUCT_SOCKADDR_IN_SIN_LEN 1
 
+/* Define to 1 if the system has the type `struct sockaddr_un'. */
+#cmakedefine EVENT__HAVE_STRUCT_SOCKADDR_UN 1
+
 /* Define to 1 if the system has the type `struct sockaddr_storage'. */
 #cmakedefine EVENT__HAVE_STRUCT_SOCKADDR_STORAGE 1
 
-- 
2.40.0