1 /****************************************************************************
2 * Copyright (c) 1998-2016,2017 Free Software Foundation, Inc. *
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5 * copy of this software and associated documentation files (the *
6 * "Software"), to deal in the Software without restriction, including *
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9 * copies of the Software, and to permit persons to whom the Software is *
10 * furnished to do so, subject to the following conditions: *
12 * The above copyright notice and this permission notice shall be included *
13 * in all copies or substantial portions of the Software. *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
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27 ****************************************************************************/
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 ****************************************************************************/
36 * clear.c -- clears the terminal's screen
40 #include <clear_cmd.h>
41 #include <tty_settings.h>
43 MODULE_ID("$Id: clear.c,v 1.22 2017/10/07 21:48:32 tom Exp $")
45 const char *_nc_progname = "clear";
50 #define KEEP(s) s "\n"
51 static const char msg[] =
55 KEEP(" -T TERM use this instead of $TERM")
56 KEEP(" -V print curses-version")
57 KEEP(" -x do not try to clear scrollback")
60 (void) fprintf(stderr, "Usage: %s [options]\n", _nc_progname);
62 ExitProgram(EXIT_FAILURE);
68 char *argv[]GCC_UNUSED)
74 bool opt_x = FALSE; /* clear scrollback if possible */
76 _nc_progname = _nc_rootname(argv[0]);
77 term = getenv("TERM");
79 while ((c = getopt(argc, argv, "T:Vx")) != -1) {
87 puts(curses_version());
88 ExitProgram(EXIT_SUCCESS);
89 case 'x': /* do not try to clear scrollback */
100 fd = save_tty_settings(&tty_settings, FALSE);
102 setupterm(term, fd, (int *) 0);
104 ExitProgram((clear_cmd(opt_x) == ERR)