$NetBSD: patch-ab,v 1.2 2004/11/25 11:53:13 imilh Exp $

--- check-hdlc-bug.c.orig	2002-06-10 19:49:33.000000000 +0200
+++ check-hdlc-bug.c
@@ -13,7 +13,9 @@
     added support for /dev/ptyXX. There was previously only /dev/ptmx
 */
 
+#if !defined(_XOPEN_SOURCE) && !defined(__osf__) && !defined(__NetBSD__)
 #define _XOPEN_SOURCE /* for grantpt in <stdlib.h> */
+#endif
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -24,6 +26,14 @@
 #include <unistd.h>
 #include <termios.h>
 #include <signal.h>
+#ifdef __NetBSD__
+#include <util.h>
+#include <string.h>
+#include <errno.h>
+#include <err.h>
+
+#define N_HDLC 13
+#endif
 
 /* for ident(1) command */
 static const char id[] =
@@ -31,6 +41,19 @@ static const char id[] =
 
 int get_master_slave_ptmx(int *master, int *slave)
 {
+#ifdef __NetBSD__
+        /* openpty(3) exists in OSF/1 and some other os'es */
+        char buf[64];
+        int i;
+
+        i = openpty(master, slave, buf, NULL, NULL);
+        if (i < 0) {
+                err(1, "openpty: %.100s", strerror(errno));
+                return -1;
+        }
+
+        return 0;
+#else
 	const char *pts;
 
 	/* try to open the master side, using /dev/ptmx */
@@ -49,6 +72,7 @@ int get_master_slave_ptmx(int *master, i
 
 	/* gotcha! */
 	return 0;
+#endif
 }
 
 int get_master_slave_pty(int *master, int *slave)