- Rename getpty() to xgetpty() and adjust callers.

- Rewrite kbd_mode and setconsole
- Introduce and use console_make_active() and xopen_xwrite_close()
- honour buffer-reservation method as set by the user (dumpkmap, loadkmap)
- shrink rtcwake and some console-tools

  Saves about 270 Bytes

libbb/get_console.c

@@ -8,10 +8,8 @@
  * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
  */
 
-//#include <sys/ioctl.h>
 #include "libbb.h"
 
-
 /* From <linux/kd.h> */
 enum { KDGKBTYPE = 0x4B33 };  /* get keyboard type */
 
@@ -70,3 +68,15 @@ int get_console_fd(void)
 	bb_error_msg("can't open console");
 	return fd;                      /* total failure */
 }
+
+/* From <linux/vt.h> */
+enum {
+	VT_ACTIVATE = 0x5606,   /* make vt active */
+	VT_WAITACTIVE = 0x5607  /* wait for vt active */
+};
+
+void console_make_active(int fd, const int vt_num)
+{
+	xioctl(fd, VT_ACTIVATE, (void *)(ptrdiff_t)vt_num);
+	xioctl(fd, VT_WAITACTIVE, (void *)(ptrdiff_t)vt_num);
+}