1/*
2 * Copyright (c) 1996, 1998-2005, 2010
3 *	Todd C. Miller <Todd.Miller@courtesan.com>
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 *
17 * Sponsored in part by the Defense Advanced Research Projects
18 * Agency (DARPA) and Air Force Research Laboratory, Air Force
19 * Materiel Command, USAF, under agreement number F39502-99-1-0512.
20 */
21
22#include <config.h>
23
24#include <sys/types.h>
25#include <sys/stat.h>
26#include <sys/param.h>
27#include <stdio.h>
28#ifdef HAVE_STRING_H
29# include <string.h>
30#endif /* HAVE_STRING_H */
31#ifdef HAVE_STRINGS_H
32# include <strings.h>
33#endif /* HAVE_STRINGS_H */
34#ifdef HAVE_UNISTD_H
35# include <unistd.h>
36#endif /* HAVE_UNISTD_H */
37#include <errno.h>
38
39#include "sudo.h"
40
41/*
42 * Verify that path is a normal file and executable by root.
43 */
44int
45sudo_goodpath(path, sbp)
46    const char *path;
47    struct stat *sbp;
48{
49    struct stat sb;
50    int rval = FALSE;
51
52    if (path != NULL && stat(path, &sb) == 0) {
53	/* Make sure path describes an executable regular file. */
54	if (S_ISREG(sb.st_mode) && ISSET(sb.st_mode, 0111))
55	    rval = TRUE;
56	else
57	    errno = EACCES;
58	if (sbp)
59	    (void) memcpy(sbp, &sb, sizeof(struct stat));
60    }
61
62    return rval;
63}
64