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
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
|
/* SPDX-License-Identifier: LGPL-2.1+ */
/***
This file is part of systemd.
Copyright 2010 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <errno.h>
#include <stdbool.h>
#include <string.h>
#include <sys/stat.h>
#include "alloc-util.h"
#include "fs-util.h"
#include "macro.h"
#include "mkdir.h"
#include "path-util.h"
#include "stat-util.h"
#include "user-util.h"
int mkdir_safe_internal(const char *path, mode_t mode, uid_t uid, gid_t gid, bool follow_symlink, mkdir_func_t _mkdir) {
struct stat st;
int r;
assert(_mkdir != mkdir);
if (_mkdir(path, mode) >= 0) {
r = chmod_and_chown(path, mode, uid, gid);
if (r < 0)
return r;
}
if (lstat(path, &st) < 0)
return -errno;
if (follow_symlink && S_ISLNK(st.st_mode)) {
_cleanup_free_ char *p = NULL;
r = chase_symlinks(path, NULL, CHASE_NONEXISTENT, &p);
if (r < 0)
return r;
if (r == 0)
return mkdir_safe_internal(p, mode, uid, gid, false, _mkdir);
if (lstat(p, &st) < 0)
return -errno;
}
if ((st.st_mode & 0007) > (mode & 0007) ||
(st.st_mode & 0070) > (mode & 0070) ||
(st.st_mode & 0700) > (mode & 0700) ||
(uid != UID_INVALID && st.st_uid != uid) ||
(gid != GID_INVALID && st.st_gid != gid) ||
!S_ISDIR(st.st_mode))
return -EEXIST;
return 0;
}
int mkdir_errno_wrapper(const char *pathname, mode_t mode) {
if (mkdir(pathname, mode) < 0)
return -errno;
return 0;
}
int mkdir_safe(const char *path, mode_t mode, uid_t uid, gid_t gid, bool follow_symlink) {
return mkdir_safe_internal(path, mode, uid, gid, follow_symlink, mkdir_errno_wrapper);
}
int mkdir_parents_internal(const char *prefix, const char *path, mode_t mode, mkdir_func_t _mkdir) {
const char *p, *e;
int r;
assert(path);
assert(_mkdir != mkdir);
if (prefix && !path_startswith(path, prefix))
return -ENOTDIR;
/* return immediately if directory exists */
e = strrchr(path, '/');
if (!e)
return -EINVAL;
if (e == path)
return 0;
p = strndupa(path, e - path);
r = is_dir(p, true);
if (r > 0)
return 0;
if (r == 0)
return -ENOTDIR;
/* create every parent directory in the path, except the last component */
p = path + strspn(path, "/");
for (;;) {
char t[strlen(path) + 1];
e = p + strcspn(p, "/");
p = e + strspn(e, "/");
/* Is this the last component? If so, then we're done */
if (*p == 0)
return 0;
memcpy(t, path, e - path);
t[e-path] = 0;
if (prefix && path_startswith(prefix, t))
continue;
r = _mkdir(t, mode);
if (r < 0 && r != -EEXIST)
return r;
}
}
int mkdir_parents(const char *path, mode_t mode) {
return mkdir_parents_internal(NULL, path, mode, mkdir_errno_wrapper);
}
int mkdir_p_internal(const char *prefix, const char *path, mode_t mode, mkdir_func_t _mkdir) {
int r;
/* Like mkdir -p */
assert(_mkdir != mkdir);
r = mkdir_parents_internal(prefix, path, mode, _mkdir);
if (r < 0)
return r;
r = _mkdir(path, mode);
if (r < 0 && (r != -EEXIST || is_dir(path, true) <= 0))
return r;
return 0;
}
int mkdir_p(const char *path, mode_t mode) {
return mkdir_p_internal(NULL, path, mode, mkdir_errno_wrapper);
}
|
