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mkdir-p.c

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1/* mkdir-p.c -- Ensure that a directory and its parents exist.-
2-
3 Copyright (C) 1990, 1997-2000, 2002-2007, 2009-2018 Free Software-
4 Foundation, Inc.-
5-
6 This program is free software: you can redistribute it and/or modify-
7 it under the terms of the GNU General Public License as published by-
8 the Free Software Foundation; either version 3 of the License, or-
9 (at your option) any later version.-
10-
11 This program is distributed in the hope that it will be useful,-
12 but WITHOUT ANY WARRANTY; without even the implied warranty of-
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the-
14 GNU General Public License for more details.-
15-
16 You should have received a copy of the GNU General Public License-
17 along with this program. If not, see <https://www.gnu.org/licenses/>. */-
18-
19/* Written by Paul Eggert, David MacKenzie, and Jim Meyering. */-
20-
21#include <config.h>-
22-
23#include "mkdir-p.h"-
24-
25#include <errno.h>-
26#include <sys/stat.h>-
27#include <unistd.h>-
28-
29#include "gettext.h"-
30#define _(msgid) gettext (msgid)-
31-
32#include "dirchownmod.h"-
33#include "dirname.h"-
34#include "error.h"-
35#include "quote.h"-
36#include "mkancesdirs.h"-
37#include "savewd.h"-
38-
39#ifndef HAVE_FCHMOD-
40# define HAVE_FCHMOD false-
41#endif-
42-
43/* Ensure that the directory DIR exists.-
44-
45 WD is the working directory, as in savewd.c.-
46-
47 If MAKE_ANCESTOR is not null, create any ancestor directories that-
48 don't already exist, by invoking MAKE_ANCESTOR (DIR, ANCESTOR, OPTIONS).-
49 This function should return zero if successful, -1 (setting errno)-
50 otherwise. In this case, DIR may be modified by storing '\0' bytes-
51 into it, to access the ancestor directories, and this modification-
52 is retained on return if the ancestor directories could not be-
53 created.-
54-
55 Create DIR as a new directory, using mkdir with permissions MODE;-
56 here, MODE is affected by the umask in the usual way. It is also-
57 OK if MAKE_ANCESTOR is not null and a directory DIR already exists.-
58-
59 Call ANNOUNCE (DIR, OPTIONS) just after successfully making DIR,-
60 even if some of the following actions fail.-
61-
62 Set DIR's owner to OWNER and group to GROUP, but leave the owner-
63 alone if OWNER is (uid_t) -1, and similarly for GROUP.-
64-
65 Set DIR's mode bits to MODE, except preserve any of the bits that-
66 correspond to zero bits in MODE_BITS. In other words, MODE_BITS is-
67 a mask that specifies which of DIR's mode bits should be set or-
68 cleared. Changing the mode in this way is necessary if DIR already-
69 existed, if MODE and MODE_BITS specify non-permissions bits like-
70 S_ISUID, or if MODE and MODE_BITS specify permissions bits that are-
71 masked out by the umask. MODE_BITS should be a subset of-
72 CHMOD_MODE_BITS.-
73-
74 However, if PRESERVE_EXISTING is true and DIR already exists,-
75 do not attempt to set DIR's ownership and file mode bits.-
76-
77 Return true if DIR exists as a directory with the proper ownership-
78 and file mode bits when done, or if a child process has been-
79 dispatched to do the real work (though the child process may not-
80 have finished yet -- it is the caller's responsibility to handle-
81 this). Report a diagnostic and return false on failure, storing-
82 '\0' into *DIR if an ancestor directory had problems. */-
83-
84bool-
85make_dir_parents (char *dir,-
86 struct savewd *wd,-
87 int (*make_ancestor) (char const *, char const *, void *),-
88 void *options,-
89 mode_t mode,-
90 void (*announce) (char const *, void *),-
91 mode_t mode_bits,-
92 uid_t owner,-
93 gid_t group,-
94 bool preserve_existing)-
95{-
96 int mkdir_errno = (IS_ABSOLUTE_FILE_NAME (dir) ? 0 : savewd_errno (wd));
(((dir)[0]) == '/')Description
TRUEevaluated 2 times by 1 test
Evaluated by:
  • ginstall
FALSEevaluated 10279 times by 2 tests
Evaluated by:
  • ginstall
  • mkdir
0 != 0Description
TRUEnever evaluated
FALSEevaluated 10279 times by 2 tests
Evaluated by:
  • ginstall
  • mkdir
0-10279
97-
98 if (mkdir_errno == 0)
mkdir_errno == 0Description
TRUEevaluated 10281 times by 2 tests
Evaluated by:
  • ginstall
  • mkdir
FALSEnever evaluated
0-10281
99 {-
100 ptrdiff_t prefix_len = 0;-
101 int savewd_chdir_options = (HAVE_FCHMOD ? SAVEWD_CHDIR_SKIP_READABLE : 0);
dead code: 0
-
102-
103 if (make_ancestor)
make_ancestorDescription
TRUEevaluated 123 times by 2 tests
Evaluated by:
  • ginstall
  • mkdir
FALSEevaluated 10158 times by 1 test
Evaluated by:
  • mkdir
123-10158
104 {-
105 prefix_len = mkancesdirs (dir, wd, make_ancestor, options);-
106 if (prefix_len < 0)
prefix_len < 0Description
TRUEevaluated 5 times by 1 test
Evaluated by:
  • ginstall
FALSEevaluated 118 times by 2 tests
Evaluated by:
  • ginstall
  • mkdir
5-118
107 {-
108 if (prefix_len < -1)
prefix_len < -1Description
TRUEevaluated 4 times by 1 test
Evaluated by:
  • ginstall
FALSEevaluated 1 time by 1 test
Evaluated by:
  • ginstall
1-4
109 return true;
executed 4 times by 1 test: return 1 ;
Executed by:
  • ginstall
4
110 mkdir_errno = errno;-
111 }
executed 1 time by 1 test: end of block
Executed by:
  • ginstall
1
112 }
executed 119 times by 2 tests: end of block
Executed by:
  • ginstall
  • mkdir
119
113-
114 if (0 <= prefix_len)
0 <= prefix_lenDescription
TRUEevaluated 10276 times by 2 tests
Evaluated by:
  • ginstall
  • mkdir
FALSEevaluated 1 time by 1 test
Evaluated by:
  • ginstall
1-10276
115 {-
116 /* If the ownership might change, or if the directory will be-
117 writable to other users and its special mode bits may-
118 change after the directory is created, create it with-
119 more restrictive permissions at first, so unauthorized-
120 users cannot nip in before the directory is ready. */-
121 bool keep_owner = owner == (uid_t) -1 && group == (gid_t) -1;
owner == (uid_t) -1Description
TRUEevaluated 10276 times by 2 tests
Evaluated by:
  • ginstall
  • mkdir
FALSEnever evaluated
group == (gid_t) -1Description
TRUEevaluated 10276 times by 2 tests
Evaluated by:
  • ginstall
  • mkdir
FALSEnever evaluated
0-10276
122 bool keep_special_mode_bits =-
123 ((mode_bits & (S_ISUID | S_ISGID)) | (mode & S_ISVTX)) == 0;-
124 mode_t mkdir_mode = mode;-
125 if (! keep_owner)
! keep_ownerDescription
TRUEnever evaluated
FALSEevaluated 10276 times by 2 tests
Evaluated by:
  • ginstall
  • mkdir
0-10276
126 mkdir_mode &= ~ (S_IRWXG | S_IRWXO);
never executed: mkdir_mode &= ~ ( ((0400|0200|0100) >> 3) | (((0400|0200|0100) >> 3) >> 3) );
0
127 else if (! keep_special_mode_bits)
! keep_special_mode_bitsDescription
TRUEevaluated 8 times by 1 test
Evaluated by:
  • ginstall
FALSEevaluated 10268 times by 1 test
Evaluated by:
  • mkdir
8-10268
128 mkdir_mode &= ~ (S_IWGRP | S_IWOTH);
executed 8 times by 1 test: mkdir_mode &= ~ ( (0200 >> 3) | ((0200 >> 3) >> 3) );
Executed by:
  • ginstall
8
129-
130 if (mkdir (dir + prefix_len, mkdir_mode) == 0)
mkdir (dir + p...dir_mode) == 0Description
TRUEevaluated 10273 times by 2 tests
Evaluated by:
  • ginstall
  • mkdir
FALSEevaluated 3 times by 1 test
Evaluated by:
  • ginstall
3-10273
131 {-
132 /* True if the caller does not care about the umask's-
133 effect on the permissions. */-
134 bool umask_must_be_ok = (mode & mode_bits & S_IRWXUGO) == 0;-
135-
136 announce (dir, options);-
137 preserve_existing = (keep_owner & keep_special_mode_bits-
138 & umask_must_be_ok);-
139 savewd_chdir_options |= SAVEWD_CHDIR_NOFOLLOW;-
140 }
executed 10273 times by 2 tests: end of block
Executed by:
  • ginstall
  • mkdir
10273
141 else-
142 {-
143 mkdir_errno = errno;-
144 mkdir_mode = -1;-
145 }
executed 3 times by 1 test: end of block
Executed by:
  • ginstall
3
146-
147 if (preserve_existing)
preserve_existingDescription
TRUEevaluated 10267 times by 1 test
Evaluated by:
  • mkdir
FALSEevaluated 9 times by 2 tests
Evaluated by:
  • ginstall
  • mkdir
9-10267
148 {-
149 struct stat st;-
150 if (mkdir_errno == 0
mkdir_errno == 0Description
TRUEevaluated 10267 times by 1 test
Evaluated by:
  • mkdir
FALSEnever evaluated
0-10267
151 || (mkdir_errno != ENOENT && make_ancestor
mkdir_errno != 2Description
TRUEnever evaluated
FALSEnever evaluated
make_ancestorDescription
TRUEnever evaluated
FALSEnever evaluated
0
152 && stat (dir + prefix_len, &st) == 0
stat (dir + pr...len, &st) == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
153 && S_ISDIR (st.st_mode)))
(((( st.st_mod... == (0040000))Description
TRUEnever evaluated
FALSEnever evaluated
0
154 return true;
executed 10267 times by 1 test: return 1 ;
Executed by:
  • mkdir
10267
155 }
never executed: end of block
0
156 else-
157 {-
158 int open_result[2];-
159 int chdir_result =-
160 savewd_chdir (wd, dir + prefix_len,-
161 savewd_chdir_options, open_result);-
162 if (chdir_result < -1)
chdir_result < -1Description
TRUEnever evaluated
FALSEevaluated 9 times by 2 tests
Evaluated by:
  • ginstall
  • mkdir
0-9
163 return true;
never executed: return 1 ;
0
164 else-
165 {-
166 bool chdir_ok = (chdir_result == 0);-
167 char const *subdir = (chdir_ok ? "." : dir + prefix_len);
chdir_okDescription
TRUEevaluated 9 times by 2 tests
Evaluated by:
  • ginstall
  • mkdir
FALSEnever evaluated
0-9
168 if (dirchownmod (open_result[0], subdir, mkdir_mode,
dirchownmod (o...ode_bits) == 0Description
TRUEevaluated 9 times by 2 tests
Evaluated by:
  • ginstall
  • mkdir
FALSEnever evaluated
0-9
169 owner, group, mode, mode_bits)
dirchownmod (o...ode_bits) == 0Description
TRUEevaluated 9 times by 2 tests
Evaluated by:
  • ginstall
  • mkdir
FALSEnever evaluated
0-9
170 == 0)
dirchownmod (o...ode_bits) == 0Description
TRUEevaluated 9 times by 2 tests
Evaluated by:
  • ginstall
  • mkdir
FALSEnever evaluated
0-9
171 return true;
executed 9 times by 2 tests: return 1 ;
Executed by:
  • ginstall
  • mkdir
9
172-
173 if (mkdir_errno == 0
mkdir_errno == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
174 || (mkdir_errno != ENOENT && make_ancestor
mkdir_errno != 2Description
TRUEnever evaluated
FALSEnever evaluated
make_ancestorDescription
TRUEnever evaluated
FALSEnever evaluated
0
175 && errno != ENOTDIR))
(*__errno_location ()) != 20Description
TRUEnever evaluated
FALSEnever evaluated
0
176 {-
177 error (0, errno,-
178 _(keep_owner-
179 ? "cannot change permissions of %s"-
180 : "cannot change owner and permissions of %s"),-
181 quote (dir));-
182 return false;
never executed: return 0 ;
0
183 }-
184 }
never executed: end of block
0
185 }-
186 }-
187 }
executed 1 time by 1 test: end of block
Executed by:
  • ginstall
1
188-
189 error (0, mkdir_errno, _("cannot create directory %s"), quote (dir));-
190 return false;
executed 1 time by 1 test: return 0 ;
Executed by:
  • ginstall
1
191}-
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