/****************************************************************************
- * Copyright (c) 1998-2013,2016 Free Software Foundation, Inc. *
+ * Copyright 2020,2021 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 *
#include <clear_cmd.h>
#include <tty_settings.h>
-MODULE_ID("$Id: clear.c,v 1.17 2016/12/24 19:33:39 tom Exp $")
+MODULE_ID("$Id: clear.c,v 1.24 2021/03/20 18:23:14 tom Exp $")
const char *_nc_progname = "clear";
+static GCC_NORETURN 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,
{
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);
+ fd = save_tty_settings(&tty_settings, FALSE);
- setupterm((char *) 0, fd, (int *) 0);
+ setupterm(term, fd, (int *) 0);
- ExitProgram((clear_cmd() == ERR)
+ ExitProgram((clear_cmd(opt_x) == ERR)
? EXIT_FAILURE
: EXIT_SUCCESS);
}