Annotation of embedaddon/sudo/plugins/sudoers/goodpath.c, revision 1.1.1.1
1.1 misho 1: /*
2: * Copyright (c) 1996, 1998-2005, 2010-2011
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 "sudoers.h"
40:
41: /*
42: * Verify that path is a normal file and executable by root.
43: */
44: char *
45: sudo_goodpath(const char *path, struct stat *sbp)
46: {
47: struct stat sb;
48:
49: /* Check for brain damage */
50: if (path == NULL || path[0] == '\0')
51: return NULL;
52:
53: if (stat(path, &sb))
54: return NULL;
55:
56: /* Make sure path describes an executable regular file. */
57: if (!S_ISREG(sb.st_mode) || !(sb.st_mode & 0000111)) {
58: errno = EACCES;
59: return NULL;
60: }
61:
62: if (sbp != NULL)
63: (void) memcpy(sbp, &sb, sizeof(struct stat));
64: return (char *)path;
65: }
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