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49e942b2 KS |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
49e942b2 KS |
11 | (at your option) any later version. |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 16 | Lesser General Public License for more details. |
49e942b2 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
49e942b2 KS |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
22 | #include <assert.h> | |
23 | #include <string.h> | |
24 | #include <unistd.h> | |
25 | #include <errno.h> | |
26 | #include <stdlib.h> | |
27 | #include <stdio.h> | |
28 | ||
49e942b2 KS |
29 | #include "label.h" |
30 | #include "util.h" | |
4ad49000 LP |
31 | #include "path-util.h" |
32 | #include "mkdir.h" | |
49e942b2 | 33 | |
39bdfa31 | 34 | int mkdir_safe_internal(const char *path, mode_t mode, uid_t uid, gid_t gid, mkdir_func_t _mkdir) { |
49e942b2 KS |
35 | struct stat st; |
36 | ||
39bdfa31 | 37 | if (_mkdir(path, mode) >= 0) |
49e942b2 KS |
38 | if (chmod_and_chown(path, mode, uid, gid) < 0) |
39 | return -errno; | |
40 | ||
41 | if (lstat(path, &st) < 0) | |
42 | return -errno; | |
43 | ||
0cb9fbcd LP |
44 | if ((st.st_mode & 0007) > (mode & 0007) || |
45 | (st.st_mode & 0070) > (mode & 0070) || | |
46 | (st.st_mode & 0700) > (mode & 0700) || | |
e66cf1a3 LP |
47 | (uid != (uid_t) -1 && st.st_uid != uid) || |
48 | (gid != (gid_t) -1 && st.st_gid != gid) || | |
49e942b2 KS |
49 | !S_ISDIR(st.st_mode)) { |
50 | errno = EEXIST; | |
51 | return -errno; | |
52 | } | |
53 | ||
54 | return 0; | |
55 | } | |
56 | ||
c66e7f04 | 57 | int mkdir_safe(const char *path, mode_t mode, uid_t uid, gid_t gid) { |
69c2b6be | 58 | return mkdir_safe_internal(path, mode, uid, gid, mkdir); |
c66e7f04 KS |
59 | } |
60 | ||
e73a03e0 | 61 | int is_dir(const char* path, bool follow) { |
9e13dbae | 62 | struct stat st; |
4ad49000 | 63 | |
e73a03e0 LP |
64 | if (follow) { |
65 | if (stat(path, &st) < 0) | |
66 | return -errno; | |
67 | } else { | |
68 | if (lstat(path, &st) < 0) | |
69 | return -errno; | |
70 | } | |
4ad49000 LP |
71 | |
72 | return S_ISDIR(st.st_mode); | |
73 | } | |
74 | ||
39bdfa31 | 75 | int mkdir_parents_internal(const char *prefix, const char *path, mode_t mode, mkdir_func_t _mkdir) { |
49e942b2 | 76 | const char *p, *e; |
4ad49000 | 77 | int r; |
49e942b2 KS |
78 | |
79 | assert(path); | |
80 | ||
4ad49000 LP |
81 | if (prefix && !path_startswith(path, prefix)) |
82 | return -ENOTDIR; | |
83 | ||
9e13dbae KS |
84 | /* return immediately if directory exists */ |
85 | e = strrchr(path, '/'); | |
86 | if (!e) | |
87 | return -EINVAL; | |
4ad49000 LP |
88 | |
89 | if (e == path) | |
90 | return 0; | |
91 | ||
9e13dbae | 92 | p = strndupa(path, e - path); |
e73a03e0 | 93 | r = is_dir(p, true); |
4ad49000 LP |
94 | if (r > 0) |
95 | return 0; | |
96 | if (r == 0) | |
97 | return -ENOTDIR; | |
49e942b2 | 98 | |
9e13dbae | 99 | /* create every parent directory in the path, except the last component */ |
49e942b2 KS |
100 | p = path + strspn(path, "/"); |
101 | for (;;) { | |
4ad49000 | 102 | char t[strlen(path) + 1]; |
49e942b2 KS |
103 | |
104 | e = p + strcspn(p, "/"); | |
105 | p = e + strspn(e, "/"); | |
106 | ||
107 | /* Is this the last component? If so, then we're | |
108 | * done */ | |
109 | if (*p == 0) | |
110 | return 0; | |
111 | ||
4ad49000 LP |
112 | memcpy(t, path, e - path); |
113 | t[e-path] = 0; | |
49e942b2 | 114 | |
4ad49000 LP |
115 | if (prefix && path_startswith(prefix, t)) |
116 | continue; | |
49e942b2 | 117 | |
39bdfa31 | 118 | r = _mkdir(t, mode); |
49e942b2 KS |
119 | if (r < 0 && errno != EEXIST) |
120 | return -errno; | |
121 | } | |
122 | } | |
123 | ||
c66e7f04 | 124 | int mkdir_parents(const char *path, mode_t mode) { |
39bdfa31 | 125 | return mkdir_parents_internal(NULL, path, mode, mkdir); |
5b585b53 ZJS |
126 | } |
127 | ||
39bdfa31 | 128 | int mkdir_p_internal(const char *prefix, const char *path, mode_t mode, mkdir_func_t _mkdir) { |
49e942b2 KS |
129 | int r; |
130 | ||
131 | /* Like mkdir -p */ | |
132 | ||
39bdfa31 | 133 | r = mkdir_parents_internal(prefix, path, mode, _mkdir); |
c66e7f04 | 134 | if (r < 0) |
49e942b2 KS |
135 | return r; |
136 | ||
39bdfa31 | 137 | r = _mkdir(path, mode); |
e73a03e0 | 138 | if (r < 0 && (errno != EEXIST || is_dir(path, true) <= 0)) |
49e942b2 KS |
139 | return -errno; |
140 | ||
141 | return 0; | |
142 | } | |
c66e7f04 KS |
143 | |
144 | int mkdir_p(const char *path, mode_t mode) { | |
39bdfa31 | 145 | return mkdir_p_internal(NULL, path, mode, mkdir); |
4ad49000 LP |
146 | } |
147 | ||
148 | int mkdir_p_prefix(const char *prefix, const char *path, mode_t mode) { | |
39bdfa31 | 149 | return mkdir_p_internal(prefix, path, mode, mkdir); |
c66e7f04 | 150 | } |