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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
49e942b2 KS |
2 | /*** |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright 2010 Lennart Poettering | |
49e942b2 KS |
6 | ***/ |
7 | ||
49e942b2 | 8 | #include <errno.h> |
11c3a366 | 9 | #include <stdbool.h> |
cf0fbc49 | 10 | #include <string.h> |
11c3a366 | 11 | #include <sys/stat.h> |
49e942b2 | 12 | |
c31ad024 | 13 | #include "alloc-util.h" |
f4f15635 | 14 | #include "fs-util.h" |
93cc7779 | 15 | #include "macro.h" |
4ad49000 | 16 | #include "mkdir.h" |
f4f15635 | 17 | #include "path-util.h" |
8fcde012 | 18 | #include "stat-util.h" |
37c1d5e9 | 19 | #include "stdio-util.h" |
ee104e11 | 20 | #include "user-util.h" |
49e942b2 | 21 | |
d50b5839 | 22 | int mkdir_safe_internal(const char *path, mode_t mode, uid_t uid, gid_t gid, MkdirFlags flags, mkdir_func_t _mkdir) { |
49e942b2 | 23 | struct stat st; |
8f2c2f20 | 24 | int r; |
49e942b2 | 25 | |
dae8b82e ZJS |
26 | assert(_mkdir != mkdir); |
27 | ||
8f2c2f20 LP |
28 | if (_mkdir(path, mode) >= 0) { |
29 | r = chmod_and_chown(path, mode, uid, gid); | |
30 | if (r < 0) | |
31 | return r; | |
32 | } | |
49e942b2 KS |
33 | |
34 | if (lstat(path, &st) < 0) | |
35 | return -errno; | |
36 | ||
d50b5839 | 37 | if ((flags & MKDIR_FOLLOW_SYMLINK) && S_ISLNK(st.st_mode)) { |
c31ad024 YW |
38 | _cleanup_free_ char *p = NULL; |
39 | ||
40 | r = chase_symlinks(path, NULL, CHASE_NONEXISTENT, &p); | |
41 | if (r < 0) | |
42 | return r; | |
43 | if (r == 0) | |
d50b5839 ZJS |
44 | return mkdir_safe_internal(p, mode, uid, gid, |
45 | flags & ~MKDIR_FOLLOW_SYMLINK, | |
46 | _mkdir); | |
c31ad024 YW |
47 | |
48 | if (lstat(p, &st) < 0) | |
49 | return -errno; | |
50 | } | |
51 | ||
37c1d5e9 ZJS |
52 | if (!S_ISDIR(st.st_mode)) { |
53 | log_full(flags & MKDIR_WARN_MODE ? LOG_WARNING : LOG_DEBUG, | |
54 | "Path \"%s\" already exists and is not a directory, refusing.", path); | |
55 | return -ENOTDIR; | |
56 | } | |
0cb9fbcd LP |
57 | if ((st.st_mode & 0007) > (mode & 0007) || |
58 | (st.st_mode & 0070) > (mode & 0070) || | |
37c1d5e9 ZJS |
59 | (st.st_mode & 0700) > (mode & 0700)) { |
60 | log_full(flags & MKDIR_WARN_MODE ? LOG_WARNING : LOG_DEBUG, | |
61 | "Directory \"%s\" already exists, but has mode %04o that is too permissive (%04o was requested), refusing.", | |
62 | path, st.st_mode & 0777, mode); | |
63 | return -EEXIST; | |
64 | } | |
65 | if ((uid != UID_INVALID && st.st_uid != uid) || | |
66 | (gid != GID_INVALID && st.st_gid != gid)) { | |
67 | char u[DECIMAL_STR_MAX(uid_t)] = "-", g[DECIMAL_STR_MAX(gid_t)] = "-"; | |
68 | ||
69 | if (uid != UID_INVALID) | |
70 | xsprintf(u, UID_FMT, uid); | |
71 | if (gid != UID_INVALID) | |
72 | xsprintf(g, GID_FMT, gid); | |
73 | log_full(flags & MKDIR_WARN_MODE ? LOG_WARNING : LOG_DEBUG, | |
74 | "Directory \"%s\" already exists, but is owned by "UID_FMT":"GID_FMT" (%s:%s was requested), refusing.", | |
75 | path, st.st_uid, st.st_gid, u, g); | |
2e6534a9 | 76 | return -EEXIST; |
37c1d5e9 | 77 | } |
49e942b2 KS |
78 | |
79 | return 0; | |
80 | } | |
81 | ||
dae8b82e ZJS |
82 | int mkdir_errno_wrapper(const char *pathname, mode_t mode) { |
83 | if (mkdir(pathname, mode) < 0) | |
84 | return -errno; | |
85 | return 0; | |
86 | } | |
87 | ||
d50b5839 ZJS |
88 | int mkdir_safe(const char *path, mode_t mode, uid_t uid, gid_t gid, MkdirFlags flags) { |
89 | return mkdir_safe_internal(path, mode, uid, gid, flags, mkdir_errno_wrapper); | |
c66e7f04 KS |
90 | } |
91 | ||
39bdfa31 | 92 | int mkdir_parents_internal(const char *prefix, const char *path, mode_t mode, mkdir_func_t _mkdir) { |
49e942b2 | 93 | const char *p, *e; |
4ad49000 | 94 | int r; |
49e942b2 KS |
95 | |
96 | assert(path); | |
dae8b82e | 97 | assert(_mkdir != mkdir); |
49e942b2 | 98 | |
4ad49000 LP |
99 | if (prefix && !path_startswith(path, prefix)) |
100 | return -ENOTDIR; | |
101 | ||
9e13dbae KS |
102 | /* return immediately if directory exists */ |
103 | e = strrchr(path, '/'); | |
104 | if (!e) | |
105 | return -EINVAL; | |
4ad49000 LP |
106 | |
107 | if (e == path) | |
108 | return 0; | |
109 | ||
9e13dbae | 110 | p = strndupa(path, e - path); |
e73a03e0 | 111 | r = is_dir(p, true); |
4ad49000 LP |
112 | if (r > 0) |
113 | return 0; | |
114 | if (r == 0) | |
115 | return -ENOTDIR; | |
49e942b2 | 116 | |
9e13dbae | 117 | /* create every parent directory in the path, except the last component */ |
49e942b2 KS |
118 | p = path + strspn(path, "/"); |
119 | for (;;) { | |
4ad49000 | 120 | char t[strlen(path) + 1]; |
49e942b2 KS |
121 | |
122 | e = p + strcspn(p, "/"); | |
123 | p = e + strspn(e, "/"); | |
124 | ||
dae8b82e | 125 | /* Is this the last component? If so, then we're done */ |
49e942b2 KS |
126 | if (*p == 0) |
127 | return 0; | |
128 | ||
4ad49000 LP |
129 | memcpy(t, path, e - path); |
130 | t[e-path] = 0; | |
49e942b2 | 131 | |
4ad49000 LP |
132 | if (prefix && path_startswith(prefix, t)) |
133 | continue; | |
49e942b2 | 134 | |
39bdfa31 | 135 | r = _mkdir(t, mode); |
dae8b82e ZJS |
136 | if (r < 0 && r != -EEXIST) |
137 | return r; | |
49e942b2 KS |
138 | } |
139 | } | |
140 | ||
c66e7f04 | 141 | int mkdir_parents(const char *path, mode_t mode) { |
dae8b82e | 142 | return mkdir_parents_internal(NULL, path, mode, mkdir_errno_wrapper); |
5b585b53 ZJS |
143 | } |
144 | ||
39bdfa31 | 145 | int mkdir_p_internal(const char *prefix, const char *path, mode_t mode, mkdir_func_t _mkdir) { |
49e942b2 KS |
146 | int r; |
147 | ||
148 | /* Like mkdir -p */ | |
149 | ||
dae8b82e ZJS |
150 | assert(_mkdir != mkdir); |
151 | ||
39bdfa31 | 152 | r = mkdir_parents_internal(prefix, path, mode, _mkdir); |
c66e7f04 | 153 | if (r < 0) |
49e942b2 KS |
154 | return r; |
155 | ||
39bdfa31 | 156 | r = _mkdir(path, mode); |
dae8b82e ZJS |
157 | if (r < 0 && (r != -EEXIST || is_dir(path, true) <= 0)) |
158 | return r; | |
49e942b2 KS |
159 | |
160 | return 0; | |
161 | } | |
c66e7f04 KS |
162 | |
163 | int mkdir_p(const char *path, mode_t mode) { | |
dae8b82e | 164 | return mkdir_p_internal(NULL, path, mode, mkdir_errno_wrapper); |
4ad49000 | 165 | } |