There is no need to #include <sgtty.h>

gnu/usr.bin/tar/config.h

@@ -273,7 +273,7 @@
 #define HAVE_SETLOCALE 1
 
 /* Define if you have the <sgtty.h> header file. */
-#define HAVE_SGTTY_H 1
+/* #define HAVE_SGTTY_H 1 */
 
 /* Define if you have the <stdbool.h> header file. */
 #define HAVE_STDBOOL_H 1

usr.sbin/rmt/rmt.c

@@ -53,7 +53,6 @@ __FBSDID("$FreeBSD$");
 #include <sys/mtio.h>
 #include <errno.h>
 #include <fcntl.h>
-#include <sgtty.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>