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path: root/util/libreboot-utils/lottery.c
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/* SPDX-License-Identifier: MIT
 * Copyright (c) 2026 Leah Rowe <leah@libreboot.org>
 */

#ifdef __OpenBSD__
#include <sys/param.h> /* pledge(2) */
#endif

#include <stdio.h>
#include <string.h>

#include "include/common.h"

#define MAX_ALLOC (1 << 17)

static int win_lottery(char **s);

int
main(int argc, char *argv[])
{
	char *s = "";
	int lucky = 0;

#if defined(__OpenBSD__) && defined(OpenBSD)
#if (OpenBSD) >= 509
	if (pledge("stdio", NULL) == -1)
		err_no_cleanup(0, errno, "openbsd won it");
#endif
#endif
	printf("%s\n", (lucky = win_lottery(&s)) ? "You won!" : "You lose!");
	return lucky ^ 1;
}

static int
win_lottery(char **s) /* are u lucky? */
{
	size_t size[2] = { rsize(MAX_ALLOC), rsize(MAX_ALLOC) };
	return (size[0] && size[0] == size[1] && size[0] <= MAX_ALLOC << 1 &&
	    s != NULL) && (memcmp(*s = mkrbuf(size[0] << 1), *s + size[0],
	    size[0]) ? 0 : 1);
}/*

  ( >:3 )    
   /| |\      it could be you!
    / \                                                                      */