console-tools/clear.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * Mini clear implementation for busybox
   4  *
   5  * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
   6  *
   7  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
   8  */
   9 //config:config CLEAR
  10 //config:       bool "clear (371 bytes)"
  11 //config:       default y
  12 //config:       help
  13 //config:       This program clears the terminal screen.
  14
  15 //applet:IF_CLEAR(APPLET_NOFORK(clear, clear, BB_DIR_USR_BIN, BB_SUID_DROP, clear))
  16
  17 //kbuild:lib-$(CONFIG_CLEAR) += clear.o
  18
  19 //usage:#define clear_trivial_usage
  20 //usage:       ""
  21 //usage:#define clear_full_usage "\n\n"
  22 //usage:       "Clear screen"
  23
  24 #include "libbb.h"
  25
  26 #define ESC "\033"
  27
  28 int clear_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  29 int clear_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
  30 {
  31         /* home; clear to the end of screen */
  32         return full_write1_str(ESC"[H" ESC"[J") != 6;
  33 }