Include "closeout.h".

(main): Call atexit with close_stdout.

src/stty.c

@@ -64,6 +64,7 @@
 #include "long-options.h"
 #include "error.h"
 #include "xstrtol.h"
+#include "closeout.h"
 
 /* The official name of this program (e.g., no `g' prefix).  */
 #define PROGRAM_NAME "stty"
@@ -717,6 +718,8 @@ main (int argc, char **argv)
   bindtextdomain (PACKAGE, LOCALEDIR);
   textdomain (PACKAGE);
 
+  atexit (close_stdout);
+
   parse_long_options (argc, argv, PROGRAM_NAME, GNU_PACKAGE, VERSION,
 		      AUTHORS, usage);
 

src/su.c

@@ -82,6 +82,7 @@
 #define getusershell _getusershell_sys_proto_
 
 #include "system.h"
+#include "closeout.h"
 
 #undef getusershell
 
@@ -449,6 +450,7 @@ Change the effective user id and group id to that of USER.\n\
 A mere - implies -l.   If USER not given, assume root.\n\
 "));
       puts (_("\nReport bugs to <bug-sh-utils@gnu.org>."));
+      close_stdout ();
     }
   exit (status);
 }