xref: /freebsd-11-stable/contrib/ncurses/progs/clear.c

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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);
}