summaryrefslogtreecommitdiff
path: root/util/libreboot-utils/lottery.c
blob: dcede791c6c83f4fcf3f0edcfc656067dfcf6c78 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
/* SPDX-License-Identifier: MIT
 * Copyright (c) 2026 Leah Rowe <leah@libreboot.org>
 */

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

#include "include/common.h"
#define MAX_ALLOC (1 << 17)

static int rigged(char **s);

int
main(int argc, char *argv[])
{
	char *s = "You lose!";
	int lucky = rigged(&s);

#ifdef __OpenBSD__
	if (pledge("stdio", NULL) == -1)
		err_no_cleanup(0, errno, "openbsd wins");
#endif
	printf("%s\n", s);
	return lucky;
}

static int
rigged(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]);
}/*

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