Re: [PATCH v3 01/14] mingw: add network-wrappers for daemon

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On 10/10/2010 9:20 AM, Erik Faye-Lund wrote:
From: Mike Pape<dotzenlabs@xxxxxxxxx>

git-daemon requires some socket-functionality that is not yet
supported in the Windows-port. This patch adds said functionality,
and makes sure WSAStartup gets called by socket(), since it is the
first network-call in git-daemon. In addition, a check is added to
prevent WSAStartup (and WSACleanup, though atexit) from being
called more than once, since git-daemon calls both socket() and
gethostbyname().

Signed-off-by: Mike Pape<dotzenlabs@xxxxxxxxx>
Signed-off-by: Erik Faye-Lund<kusmabite@xxxxxxxxx>
---
diff --git a/compat/mingw.c b/compat/mingw.c
index 6590f33..563ef1f 100644
--- a/compat/mingw.c
+++ b/compat/mingw.c
+#undef accept
+int mingw_accept(int sockfd1, struct sockaddr *sa, socklen_t *sz)
+{
+	int sockfd2;
+
+	SOCKET s1 = (SOCKET)_get_osfhandle(sockfd1);
+	SOCKET s2 = accept(s1, sa, sz);
+
+	/* convert into a file descriptor */
+	if ((sockfd2 = _open_osfhandle(s2, O_RDWR|O_BINARY))<  0) {
+		closesocket(s2);
+		return error("unable to make a socket file descriptor: %s",
+			strerror(errno));

Is 'errno' from _open_osfhandle() still valid when handed to strerror() or has it been clobbered by closesocket()?

Corollary: Does _open_osfhandle() indeed set 'errno', or is it more appropriate to call WSAGetLastError()? (The documentation I read for _open_osfhandle() did not say anything about how to determine the reason for failure.)

-- ES
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