diff -up ksh-20100621/src/cmd/ksh93/sh/xec.c.justone ksh-20100621/src/cmd/ksh93/sh/xec.c
--- ksh-20100621/src/cmd/ksh93/sh/xec.c.justone	2012-01-18 12:03:04.588427696 +0100
+++ ksh-20100621/src/cmd/ksh93/sh/xec.c	2012-01-18 12:05:01.644335287 +0100
@@ -1426,7 +1426,7 @@ int sh_exec(register const Shnode_t *t,
 					sh_iounsave(shp);
 				topfd = shp->topfd;
 				sh_redirect(shp,t->tre.treio,1);
-				if(shp->topfd > topfd)
+				if(!no_fork && shp->topfd > topfd)
 				{
 					job_lock();
 					while((parent = vfork()) < 0)