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/****************************************************************************
* Copyright 2020 Thomas E. Dickey *
* Copyright 1998-2016,2017 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 *
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
* THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
* *
* Except as contained in this notice, the name(s) of the above copyright *
* holders shall not be used in advertising or otherwise to promote the *
* sale, use or other dealings in this Software without prior written *
* authorization. *
****************************************************************************/
/****************************************************************************
* 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 <clear_cmd.h>
#include <tty_settings.h>
MODULE_ID("$Id: clear.c,v 1.23 2020/02/02 23:34:34 tom Exp $")
const char *_nc_progname = "clear";
static void
usage(void)
{
#define KEEP(s) s "\n"
static const char msg[] =
{
KEEP("")
KEEP("Options:")
KEEP(" -T TERM use this instead of $TERM")
KEEP(" -V print curses-version")
KEEP(" -x do not try to clear scrollback")
};
#undef KEEP
(void) fprintf(stderr, "Usage: %s [options]\n", _nc_progname);
fputs(msg, stderr);
ExitProgram(EXIT_FAILURE);
}
int
main(
int argc GCC_UNUSED,
char *argv[]GCC_UNUSED)
{
TTY tty_settings;
int fd;
int c;
char *term;
bool opt_x = FALSE; /* clear scrollback if possible */
_nc_progname = _nc_rootname(argv[0]);
term = getenv("TERM");
while ((c = getopt(argc, argv, "T:Vx")) != -1) {
switch (c) {
case 'T':
use_env(FALSE);
use_tioctl(TRUE);
term = optarg;
break;
case 'V':
puts(curses_version());
ExitProgram(EXIT_SUCCESS);
case 'x': /* do not try to clear scrollback */
opt_x = TRUE;
break;
default:
usage();
/* NOTREACHED */
}
}
if (optind < argc)
usage();
fd = save_tty_settings(&tty_settings, FALSE);
setupterm(term, fd, (int *) 0);
ExitProgram((clear_cmd(opt_x) == ERR)
? EXIT_FAILURE
: EXIT_SUCCESS);
}
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