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Date:	Wed, 4 Jul 2018 04:17:40 +0900
From:	Takashi Yano <takashi DOT yano AT nifty DOT ne DOT jp>
To:	cygwin AT cygwin DOT com
Subject:	Re: Named AF_UNIX socket not working in cygwin1.dll of git HEAD.
Message-Id:	<20180704041740.82e2bae6c8cd016a3c303c94@nifty.ne.jp>
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References:	<20180703194429 DOT 6aeab3cb1041fe475ecde834 AT nifty DOT ne DOT jp> <20180703130558 DOT GI3111 AT calimero DOT vinschen DOT de> <20180704020108 DOT a1aa8188429a83986b5a19d7 AT nifty DOT ne DOT jp>
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Hi Corinna,

On Wed, 4 Jul 2018 02:01:08 +0900
Takashi Yano wrote:
> I have check and found this happens only in 32 bit version. I mean
> 32 bit cygwin on 64 bit windows 10. 64 bit version work as expected.

I have looked into this problem, and found calling af_local_set_secret()
in fhandler_socket_local::bind() causes exception 0xc0000005.

Calling RtlGenRandom() in af_local_set_secret() may not be as expected.

While building cygwin1.dll in 32 bit environment, following warning is
shown. This is probably the cause.

Warning: resolving _SystemFunction036 by linking to _SystemFunction036 AT 8

I am not sure why, but the following patch seems to be able solve this
problem.

diff --git a/winsup/cygwin/fhandler_socket_local.cc b/winsup/cygwin/fhandler_socket_local.cc
index 2e01f30a2..68786f3a4 100644
--- a/winsup/cygwin/fhandler_socket_local.cc
+++ b/winsup/cygwin/fhandler_socket_local.cc
@@ -21,7 +21,7 @@
 #undef u_long
 #define u_long __ms_u_long
 #endif
-#include <w32api/ntsecapi.h>
+#include <ntsecapi.h>
 #include <w32api/ws2tcpip.h>
 #include <w32api/mswsock.h>
 #include <unistd.h>

Thank you.

-- 
Takashi Yano <takashi DOT yano AT nifty DOT ne DOT jp>

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