--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/osdep/dos/os_dnv.c	Mon Sep 14 15:17:45 2009 +0900
@@ -0,0 +1,95 @@
+/* ========================================================================
+ * Copyright 1988-2006 University of Washington
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 
+ * ========================================================================
+ */
+
+/*
+ * Program:	Operating-system dependent routines -- MS-DOS (Novell) version
+ *
+ * Author:	Mark Crispin
+ *		Networks and Distributed Computing
+ *		Computing & Communications
+ *		University of Washington
+ *		Administration Building, AG-44
+ *		Seattle, WA  98195
+ *		Internet: MRC@CAC.Washington.EDU
+ *
+ * Date:	11 April 1989
+ * Last Edited:	30 August 2006
+ */
+
+/* Private function prototypes */
+
+#include "tcp_dos.h"		/* must be before osdep includes tcp.h */
+#include "mail.h"
+#include "osdep.h"
+#include <time.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <sys\stat.h>
+#include <sys\timeb.h>
+#include <sys\socket.h>
+#include <netinet\in.h>
+#include <netdb.h>
+#include "misc.h"
+
+
+#include "fs_dos.c"
+#include "ftl_dos.c"
+#include "nl_dos.c"
+#include "env_dos.c"
+#undef write
+#define read soread
+#define write sowrite
+#define close soclose 
+#include "tcp_dos.c"
+
+
+/* Return my local host name
+ * Returns: my local host name
+ */
+
+char *mylocalhost (void)
+{
+  if (!myLocalHost) {		/* known yet? */
+    char *s,tmp[MAILTMPLEN];
+    struct hostent *he;
+    struct in_addr in;
+				/* could we get local id? */
+    if ((in.s_addr = getmyipaddr ()) != -1) {
+      if (he = gethostbyaddr ((char *) &in.s_addr,4,PF_INET)) s = he->h_name;
+      else sprintf (s = tmp,"[%s]",inet_ntoa (in));
+    }
+    else s = "random-pc";	/* say what? */
+    myLocalHost = cpystr (s);	/* record for subsequent use */
+  }
+  return myLocalHost;
+}
+
+
+/* Look up host address
+ * Accepts: pointer to pointer to host name
+ *	    socket address block
+ * Returns: non-zero with host address in socket, official host name in host;
+ *	    else NIL
+ */
+
+long lookuphost (char **host,struct sockaddr_in *sin)
+{
+  char *s = *host;		/* in case of error */
+  sin->sin_addr.s_addr = rhost (host);
+  if (sin->sin_addr.s_addr == -1) {
+    *host = s;			/* error, restore old host name */
+    return NIL;
+  }
+  *host = cpystr (*host);	/* make permanent copy of name */
+  return T;			/* success */
+}