$NetBSD: patch-aj,v 1.1 2002/10/14 11:55:14 skrll Exp $

--- pth_util.c.orig	Sun Jan 27 13:11:39 2002
+++ pth_util.c
@@ -181,3 +181,25 @@ intern int pth_util_fds_select(int nfd,
     return n;
 }
 
+/*
+ * zero the first 'nfd' file descriptors in an fd_set.
+ */
+intern int pth_util_fd_zero(int nfd, fd_set *fds)
+{
+    int i;
+    for (i=0; i<nfd; i++)
+        FD_CLR(i, fds);
+}
+
+/*
+ * copy the first 'nfd' file descriptors from one fd_set to another.
+ */
+intern int pth_util_fd_copy(int nfd, fd_set* dfds, fd_set* sfds) 
+{
+    int i;
+    for (i=0; i < nfd; i++)
+        if (FD_ISSET(i, sfds))
+            FD_SET(i, dfds);
+        else
+            FD_CLR(i, dfds);
+}