setuid-allowed.c revision 262566 
1/*
2 * Copyright (c) 2013 Damien Miller <djm@mindrot.org>
3 *
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17/* $OpenBSD$ */
18
19#include "includes.h"
20
21#include <sys/types.h>
22#ifdef HAVE_SYS_STATVFS_H
23# include <sys/statvfs.h>
24#endif
25#include <stdio.h>
26#include <errno.h>
27
28void
29usage(void)
30{
31	fprintf(stderr, "check-setuid [path]\n");
32	exit(1);
33}
34
35int
36main(int argc, char **argv)
37{
38	const char *path = ".";
39	struct statvfs sb;
40
41	if (argc > 2)
42		usage();
43	else if (argc == 2)
44		path = argv[1];
45
46	if (statvfs(path, &sb) != 0) {
47		/* Don't return an error if the host doesn't support statvfs */
48		if (errno == ENOSYS)
49			return 0;
50		fprintf(stderr, "statvfs for \"%s\" failed: %s\n",
51		     path, strerror(errno));
52	}
53	return (sb.f_flag & ST_NOSUID) ? 1 : 0;
54}
55
56
57