LXR busybox/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 (tiny)"
  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
  28int clear_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  29int 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}
  34