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
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
|
/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* SPDX-License-Identifier: MPL-2.0
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, you can obtain one at https://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
#include <errno.h>
#include <stdbool.h>
#include <sys/stat.h>
#include <sys/types.h>
#include "errno2result.h"
/*! \file
* \brief
* The OS-independent part of the API is in lib/isc.
*/
#include "../fsaccess.c"
isc_result_t
isc_fsaccess_set(const char *path, isc_fsaccess_t access) {
struct stat statb;
mode_t mode;
bool is_dir = false;
isc_fsaccess_t bits;
isc_result_t result;
if (stat(path, &statb) != 0) {
return (isc__errno2result(errno));
}
if ((statb.st_mode & S_IFDIR) != 0) {
is_dir = true;
} else if ((statb.st_mode & S_IFREG) == 0) {
return (ISC_R_INVALIDFILE);
}
result = check_bad_bits(access, is_dir);
if (result != ISC_R_SUCCESS) {
return (result);
}
/*
* Done with checking bad bits. Set mode_t.
*/
mode = 0;
#define SET_AND_CLEAR1(modebit) \
if ((access & bits) != 0) { \
mode |= modebit; \
access &= ~bits; \
}
#define SET_AND_CLEAR(user, group, other) \
SET_AND_CLEAR1(user); \
bits <<= STEP; \
SET_AND_CLEAR1(group); \
bits <<= STEP; \
SET_AND_CLEAR1(other);
bits = ISC_FSACCESS_READ | ISC_FSACCESS_LISTDIRECTORY;
SET_AND_CLEAR(S_IRUSR, S_IRGRP, S_IROTH);
bits = ISC_FSACCESS_WRITE | ISC_FSACCESS_CREATECHILD |
ISC_FSACCESS_DELETECHILD;
SET_AND_CLEAR(S_IWUSR, S_IWGRP, S_IWOTH);
bits = ISC_FSACCESS_EXECUTE | ISC_FSACCESS_ACCESSCHILD;
SET_AND_CLEAR(S_IXUSR, S_IXGRP, S_IXOTH);
INSIST(access == 0);
if (chmod(path, mode) < 0) {
return (isc__errno2result(errno));
}
return (ISC_R_SUCCESS);
}
|
