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if both stdout and stderr are redirected to a non-tty, pledge(2) will kill
ncurses applications, e.g.:

/usr/games/worms 2>&1 | cat

solve this by only calling pledge(2) after initscr(3) is set and done, or
whatever function that calls it. since pledge(2) is called later now the
promises might be reduced, but this a diff for another day.

found by naddy@ almost a year ago, discussed with him deraadt@ and tb@
ok tb@

/*	$OpenBSD: mille.c,v 1.26 2021/10/23 11:22:49 mestre Exp $	*/
/*	$NetBSD: mille.c,v 1.4 1995/03/24 05:01:48 cgd Exp $	*/

/*
 * Copyright (c) 1982, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <err.h>
#include <signal.h>
#include <stdlib.h>
#ifdef DEBUG
#include <string.h>
#endif
#include <unistd.h>

#include "mille.h"

/*
 * @(#)mille.c	1.3 (Berkeley) 5/10/83
 */

int
main(int ac, char *av[])
{
	bool	restore;
	extern char *__progname;

#ifdef DEBUG
	if (strcmp(av[0], "a.out") == 0) {
		outf = fopen("q", "w");
		setvbuf(outf, NULL, _IONBF, 0);
		Debug = TRUE;
	}
#endif
	restore = FALSE;
	switch (ac) {
	  case 2:
		rest_f(av[1]);
		restore = TRUE;
	  case 1:
		break;
	  default:
		fprintf(stderr, "usage: %s [file]\n", __progname);
		return 1;
	}
	Play = PLAYER;
	initscr();

	if (pledge("stdio rpath wpath cpath tty", NULL) == -1)
		err(1, "pledge");

	if ((LINES < 24) || (COLS < 80)) {
		endwin();
		fprintf(stderr, "Screen must be at least 24x80\n");
		return 1;
	}
	delwin(stdscr);
	stdscr = Board = newwin(BOARD_Y, BOARD_X, 0, 0);
	Score = newwin(SCORE_Y, SCORE_X, 0, 40);
	Miles = newwin(MILES_Y, MILES_X, 17, 0);
	leaveok(Score, TRUE);
	leaveok(Miles, TRUE);
	clearok(curscr, TRUE);
	cbreak();
	noecho();
	signal(SIGINT, rub);
	for (;;) {
		if (!restore || (Player[PLAYER].total >= 5000
		    || Player[COMP].total >= 5000)) {
			if (Player[COMP].total < Player[PLAYER].total)
				Player[PLAYER].games++;
			else if (Player[COMP].total > Player[PLAYER].total)
				Player[COMP].games++;
			Player[COMP].total = 0;
			Player[PLAYER].total = 0;
		}
		do {
			if (!restore)
				Handstart = Play = other(Handstart);
			if (!restore || On_exit) {
				shuffle();
				init();
			}
			newboard();
			if (restore)
				mvwaddstr(Score, ERR_Y, ERR_X, Initstr);
			prboard();
			do {
				domove();
				if (Finished)
					newscore();
				prboard();
			} while (!Finished);
			check_more();
			restore = On_exit = FALSE;
		} while (Player[COMP].total < 5000
		    && Player[PLAYER].total < 5000);
	}
}

/*
 *	Routine to trap rubouts, and make sure they really want to
 * quit.
 */
void
rub(int dummy)
{
	(void)signal(SIGINT, SIG_IGN);
	if (getyn(REALLYPROMPT))
		die(0);
	(void)signal(SIGINT, rub);
}

/*
 *	Time to go beddy-by
 */
void
die(int code)
{
	(void)signal(SIGINT, SIG_IGN);
	if (outf)
		fflush(outf);
	mvcur(0, COLS - 1, LINES - 1, 0);
	endwin();
	exit(code);
}