1 /**************************************************************************** 2 * Copyright (c) 1998-2007,2013 Free Software Foundation, Inc. * 3 * * 4 * Permission is hereby granted, free of charge, to any person obtaining a * 5 * copy of this software and associated documentation files (the * 6 * "Software"), to deal in the Software without restriction, including * 7 * without limitation the rights to use, copy, modify, merge, publish, * 8 * distribute, distribute with modifications, sublicense, and/or sell * 9 * copies of the Software, and to permit persons to whom the Software is * 10 * furnished to do so, subject to the following conditions: * 11 * * 12 * The above copyright notice and this permission notice shall be included * 13 * in all copies or substantial portions of the Software. * 14 * * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * 16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * 17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * 18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * 19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 22 * * 23 * Except as contained in this notice, the name(s) of the above copyright * 24 * holders shall not be used in advertising or otherwise to promote the * 25 * sale, use or other dealings in this Software without prior written * 26 * authorization. * 27 ****************************************************************************/ 28 29 /**************************************************************************** 30 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 * 31 * and: Eric S. Raymond <esr@snark.thyrsus.com> * 32 * and: Thomas E. Dickey 1996-on * 33 ****************************************************************************/ 34 35 /* 36 * clear.c -- clears the terminal's screen 37 */ 38 39 #define USE_LIBTINFO 40 #include <progs.priv.h> 41 42 MODULE_ID("$Id: clear.c,v 1.13 2013/06/22 22:20:54 tom Exp $") 43 44 static int 45 putch(int c) 46 { 47 return putchar(c); 48 } 49 50 int 51 main( 52 int argc GCC_UNUSED, 53 char *argv[]GCC_UNUSED) 54 { 55 char *E3; 56 57 setupterm((char *) 0, STDOUT_FILENO, (int *) 0); 58 59 /* Clear the scrollback buffer if possible. */ 60 E3 = tigetstr("E3"); 61 if (E3) 62 (void) tputs(E3, lines > 0 ? lines : 1, putch); 63 64 ExitProgram((tputs(clear_screen, lines > 0 ? lines : 1, putch) == ERR) 65 ? EXIT_FAILURE 66 : EXIT_SUCCESS); 67 } 68