diff -up ksh-20100621/src/cmd/ksh93/sh/subshell.c.orig ksh-20100621/src/cmd/ksh93/sh/subshell.c
--- ksh-20100621/src/cmd/ksh93/sh/subshell.c.orig	2013-04-02 10:24:47.706650906 -0500
+++ ksh-20100621/src/cmd/ksh93/sh/subshell.c	2013-04-02 10:27:07.602651596 -0500
@@ -109,7 +109,7 @@ void	sh_subtmpfile(Shell_t *shp)
 		register struct checkpt	*pp = (struct checkpt*)shp->jmplist;
 		register struct subshell *sp = subshell_data->pipe;
 		/* save file descriptor 1 if open */
-		if((sp->tmpfd = fd = fcntl(1,F_DUPFD,10)) >= 0)
+		if((sp->tmpfd = fd = sh_fcntl(1,F_DUPFD,10)) >= 0)
 		{
 			fcntl(fd,F_SETFD,FD_CLOEXEC);
 			shp->fdstatus[fd] = shp->fdstatus[1]|IOCLEX;
diff -up ksh-20100621/src/cmd/ksh93/sh/xec.c.orig ksh-20100621/src/cmd/ksh93/sh/xec.c
--- ksh-20100621/src/cmd/ksh93/sh/xec.c.orig	2013-04-02 10:24:21.268900283 -0500
+++ ksh-20100621/src/cmd/ksh93/sh/xec.c	2013-04-02 10:28:25.537656455 -0500
@@ -90,7 +90,7 @@ static void iousepipe(Shell_t *shp)
 {
 	int i;
 	fcntl(subpipe[0],F_SETFD,FD_CLOEXEC);
-	subpipe[2] = fcntl(1,F_DUPFD,10);
+	subpipe[2] = sh_fcntl(1,F_DUPFD,10);
 	fcntl(subpipe[2],F_SETFD,FD_CLOEXEC);
 	shp->fdstatus[subpipe[2]] = shp->fdstatus[1];
 	close(1);
@@ -2961,7 +2961,7 @@ static void coproc_init(Shell_t *shp, in
 		sh_pipe(shp->cpipe);
 		if((outfd=shp->cpipe[1]) < 10) 
 		{
-		        int fd=fcntl(shp->cpipe[1],F_DUPFD,10);
+		        int fd=sh_fcntl(shp->cpipe[1],F_DUPFD,10);
 			if(fd>=10)
 			{
 			        shp->fdstatus[fd] = (shp->fdstatus[outfd]&~IOCLEX);