regress: Support NULL fdset arguments to select

[adns] / regress / hplayback.c.m4

diff --git a/regress/hplayback.c.m4 b/regress/hplayback.c.m4
index dfb0a0c..792952f 100644 (file)
--- a/regress/hplayback.c.m4
+++ b/regress/hplayback.c.m4
@@ -3,14 +3,15 @@ m4_dnl (part of complex test harness, not of the library)
 m4_dnl - playback routines
 
 m4_dnl  This file is part of adns, which is
-m4_dnl    Copyright (C) 1997-2000,2003,2006  Ian Jackson
+m4_dnl    Copyright (C) 1997-2000,2003,2006,2014  Ian Jackson
+m4_dnl    Copyright (C) 2014  Mark Wooding
 m4_dnl    Copyright (C) 1999-2000,2003,2006  Tony Finch
 m4_dnl    Copyright (C) 1991 Massachusetts Institute of Technology
 m4_dnl  (See the file INSTALL for full details.)
 m4_dnl  
 m4_dnl  This program is free software; you can redistribute it and/or modify
 m4_dnl  it under the terms of the GNU General Public License as published by
-m4_dnl  the Free Software Foundation; either version 2, or (at your option)
+m4_dnl  the Free Software Foundation; either version 3, or (at your option)
 m4_dnl  any later version.
 m4_dnl  
 m4_dnl  This program is distributed in the hope that it will be useful,
@@ -19,8 +20,7 @@ m4_dnl  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 m4_dnl  GNU General Public License for more details.
 m4_dnl  
 m4_dnl  You should have received a copy of the GNU General Public License
-m4_dnl  along with this program; if not, write to the Free Software Foundation,
-m4_dnl  Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 
+m4_dnl  along with this program; if not, write to the Free Software Foundation.
 
 m4_include(hmacros.i4)
 
@@ -150,6 +150,11 @@ static void P_updatetime(void) {
 static void Pfdset(fd_set *set, int max) {
   int r, c;
   char *ep;
+
+  if (!set) {
+    Pstring("null","null fdset pointer");
+    return;
+  }
   
   if (vb2.buf[vb2.used++] != hm_squote[hm_squote) Psyntax("fd set start not [");
   FD_ZERO(set);