> Ok, where's a "system dependent hack" :)

> It seems that win9x doesn't have the "netmsg.dll" so it defaults to "normal"
> FormatMessage.
> I wonder if one could load wsock32.dll or winsock.dll on those systems
> instead of netmsg.dll.
>
> Mikhail, could you please test this code on your nt4 system?
> Could someone else test this code on a win98/95 system?
>
> It works on win2k over here.

It works on win2k here too but not on win98/95 or winNT.
Anyway, attached is the patch which uses Magnus's my_sock_strerror
function (renamed to winsock_strerror). The only difference is that
I put the code to load and unload netmsg.dll in the libpqdll.c
(is this OK Magnus?).

Mikhail Terekhov

src/interfaces/libpq/win32.h

@@ -23,19 +23,17 @@
  */
 #define crypt(a,b) (a)
 
-/*
- * Most of libpq uses "errno" to access error conditions from socket calls,
- * so on Windows we want to redirect those usages to WSAGetLastError().
- * Rather than #ifdef'ing every single place that has "errno", hack it up
- * with a macro instead.  But there are a few places that do need to touch
- * the regular errno variable.  For them, we #undef and then redefine errno.
- */
-
-#define errno WSAGetLastError()
-
 #undef EAGAIN	/* doesn't apply on sockets */
 #undef EINTR
 #define EINTR WSAEINTR
 #define EWOULDBLOCK WSAEWOULDBLOCK
 #define ECONNRESET WSAECONNRESET
 #define EINPROGRESS WSAEINPROGRESS
+
+/*
+ * Windows network messaging stuff:
+ */
+static HINSTANCE netmsgModule = NULL;
+
+static char winsock_strerror_buf[512];
+const char* winsock_strerror(DWORD eno);