--- o/run_process.c.orig	2013-11-14 10:26:15.981608069 -0700
+++ o/run_process.c	2013-11-14 19:00:00.000000000 -0700
@@ -533,10 +533,10 @@
   fdout = ostream->sm.sm_int0;
   if (fork() == 0)
     { /* the child --- replace standard in and out with descriptors given */
-      close(0);
-      massert(dup(fdin)>=0);
-      close(1);
-      massert(dup(fdout)>=0);
+      massert(dup2(fdin, 0)>=0);
+      massert(dup2(fdout, 1)>=0);
+      close(fdin);
+      close(fdout);
       fprintf(stderr, "\n***** Spawning process %s ", pname);
       if (execvp(pname, argv) == -1)
 	{