xref: /freebsd/contrib/ncurses/progs/clear.c (revision 73f0a83d68863a383fd8953972cd36eb6420ec7d)

/****************************************************************************
 * Copyright (c) 1998-2007,2013 Free Software Foundation, Inc.              *
 *                                                                          *
 * Permission is hereby granted, free of charge, to any person obtaining a  *
 * copy of this software and associated documentation files (the            *
 * "Software"), to deal in the Software without restriction, including      *
 * without limitation the rights to use, copy, modify, merge, publish,      *
 * distribute, distribute with modifications, sublicense, and/or sell       *
 * copies of the Software, and to permit persons to whom the Software is    *
 * furnished to do so, subject to the following conditions:                 *
 *                                                                          *
 * The above copyright notice and this permission notice shall be included  *
 * in all copies or substantial portions of the Software.                   *
 *                                                                          *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
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 *                                                                          *
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 ****************************************************************************/

/****************************************************************************
 *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
 *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
 *     and: Thomas E. Dickey                        1996-on                 *
 ****************************************************************************/

/*
 * clear.c --  clears the terminal's screen
 */

#define USE_LIBTINFO
#include <progs.priv.h>

MODULE_ID("$Id: clear.c,v 1.13 2013/06/22 22:20:54 tom Exp $")

static int
putch(int c)
{
    return putchar(c);
}

int
main(
	int argc GCC_UNUSED,
	char *argv[]GCC_UNUSED)
{
    char *E3;

    setupterm((char *) 0, STDOUT_FILENO, (int *) 0);

    /* Clear the scrollback buffer if possible. */
    E3 = tigetstr("E3");
    if (E3)
	(void) tputs(E3, lines > 0 ? lines : 1, putch);

    ExitProgram((tputs(clear_screen, lines > 0 ? lines : 1, putch) == ERR)
		? EXIT_FAILURE
		: EXIT_SUCCESS);
}