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diff -up ksh-20120801/src/cmd/ksh93/sh/io.c.fdstatus ksh-20120801/src/cmd/ksh93/sh/io.c
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--- ksh-20120801/src/cmd/ksh93/sh/io.c.fdstatus	2013-07-04 18:01:27.187516655 +0200
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+++ ksh-20120801/src/cmd/ksh93/sh/io.c	2013-07-04 18:01:38.249607392 +0200
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@@ -1508,7 +1508,7 @@ int	sh_redirect(Shell_t *shp,struct iono
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 					fn = fd;
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 					if(fd<10)
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 					{
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-						if((fn=fcntl(fd,F_DUPFD,10)) < 0)
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+						if((fn=sh_fcntl(fd,F_DUPFD,10)) < 0)
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 							goto fail;
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 						if(fn>=shp->gd->lim.open_max && !sh_iovalidfd(shp,fn))
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 							goto fail;
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diff -up ksh-20120801/src/cmd/ksh93/sh/subshell.c.fdstatus ksh-20120801/src/cmd/ksh93/sh/subshell.c
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--- ksh-20120801/src/cmd/ksh93/sh/subshell.c.fdstatus	2012-07-17 23:54:21.000000000 +0200
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+++ ksh-20120801/src/cmd/ksh93/sh/subshell.c	2013-07-04 17:56:20.342000310 +0200
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@@ -122,7 +122,7 @@ void	sh_subtmpfile(Shell_t *shp)
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 		register struct checkpt	*pp = (struct checkpt*)shp->jmplist;
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 		register struct subshell *sp = subshell_data->pipe;
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 		/* save file descriptor 1 if open */
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-		if((sp->tmpfd = fd = fcntl(1,F_DUPFD,10)) >= 0)
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+		if((sp->tmpfd = fd = sh_fcntl(1,F_DUPFD,10)) >= 0)
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 		{
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 			fcntl(fd,F_SETFD,FD_CLOEXEC);
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 			shp->fdstatus[fd] = shp->fdstatus[1]|IOCLEX;
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@@ -554,7 +554,7 @@ Sfio_t *sh_subshell(Shell_t *shp,Shnode_
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 				sp->pwdfd = n;
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 				if(n<10)
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 				{
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-					sp->pwdfd =  fcntl(n,F_DUPFD,10);
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+					sp->pwdfd = sh_fcntl(n,F_DUPFD,10);
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 					close(n);
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 				}
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 				if(sp->pwdfd>0)
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diff -up ksh-20120801/src/cmd/ksh93/sh/xec.c.fdstatus ksh-20120801/src/cmd/ksh93/sh/xec.c
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--- ksh-20120801/src/cmd/ksh93/sh/xec.c.fdstatus	2012-07-23 16:49:32.000000000 +0200
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+++ ksh-20120801/src/cmd/ksh93/sh/xec.c	2013-07-04 17:57:47.153712116 +0200
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@@ -116,7 +116,7 @@ static int iousepipe(Shell_t *shp)
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 		return(0);
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 	usepipe++;
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 	fcntl(subpipe[0],F_SETFD,FD_CLOEXEC);
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-	subpipe[2] = fcntl(1,F_DUPFD,10);
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+	subpipe[2] = sh_fcntl(1,F_DUPFD,10);
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 	fcntl(subpipe[2],F_SETFD,FD_CLOEXEC);
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 	shp->fdstatus[subpipe[2]] = shp->fdstatus[1];
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 	close(1);
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@@ -3622,7 +3622,7 @@ static void coproc_init(Shell_t *shp, in
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 		sh_pipe(shp->cpipe);
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 		if((outfd=shp->cpipe[1]) < 10) 
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 		{
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-		        int fd=fcntl(shp->cpipe[1],F_DUPFD,10);
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+		        int fd=sh_fcntl(shp->cpipe[1],F_DUPFD,10);
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 			if(fd>=10)
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 			{
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 			        shp->fdstatus[fd] = (shp->fdstatus[outfd]&~IOCLEX);