bw_pipe.c: close pipe descriptors as appropriate

benchmarks/hbench/distinfo

@@ -1,4 +1,4 @@
-$NetBSD: distinfo,v 1.2 2001/04/20 09:13:24 agc Exp $
+$NetBSD: distinfo,v 1.3 2001/09/22 15:25:32 jdolecek Exp $
 
 SHA1 (hbench-OS-1.0.tar.gz) = f8461fee712e354072f2764496403a50c1543c24
 Size (hbench-OS-1.0.tar.gz) = 205666 bytes
@@ -13,3 +13,4 @@ SHA1 (patch-ah) = 6c01c679b394985d0570df4fe29c09642cbde6c3
 SHA1 (patch-ai) = d59d05c9d73aa4c06f5ac5153a069694a4267fd1
 SHA1 (patch-aj) = 7bca0c1062626b5c03f04b7bce17f7c2d8c14231
 SHA1 (patch-ak) = 986d86c1b6d6850585cde8cb9ffd119fbe2351ee
+SHA1 (patch-al) = a94603837789248bff873ec787ede901dd1ed215

benchmarks/hbench/patches/patch-al

@@ -0,0 +1,30 @@
+$NetBSD: patch-al,v 1.1 2001/09/22 15:25:33 jdolecek Exp $
+
+--- bw_pipe.c.orig	Fri Sep 21 18:39:15 2001
++++ bw_pipe.c	Fri Sep 21 18:39:48 2001
+@@ -147,6 +147,8 @@ do_pipexfer(num_iter, t)
+ 	/* Spawn off a writer, then time the read */
+ 	switch (fork()) {
+ 	case 0:			/* writer */
++		close(pipes[0]);
++
+ 		while ((done < todo) &&
+ 		       ((n = write(pipes[1], buf, bufsize)) > 0))
+ 			done += n;
+@@ -159,6 +161,8 @@ do_pipexfer(num_iter, t)
+ 		/*NOTREACHED*/
+ 		
+ 	default:		/* reader */
++		close(pipes[1]);
++
+ 		/* wait for writer */
+ 		sleep(1);
+ 		
+@@ -168,6 +172,7 @@ do_pipexfer(num_iter, t)
+ 			done += n;
+ 		*t = stop();	/* stop timing */
+ 
++		close(pipes[0]);
+ 		wait(&termstat); /* wait for writer to exit */
+ 	}
+