1 | /* vi: set sw=4 ts=4: */
|
---|
2 | /*
|
---|
3 | * parse_mode implementation for busybox
|
---|
4 | *
|
---|
5 | * Copyright (C) 2003 Manuel Novoa III <mjn3@codepoet.org>
|
---|
6 | *
|
---|
7 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
|
---|
8 | */
|
---|
9 |
|
---|
10 | /* Mar 5, 2003 Manuel Novoa III
|
---|
11 | *
|
---|
12 | * This is the main work function for the 'mkdir' applet. As such, it
|
---|
13 | * strives to be SUSv3 compliant in it's behaviour when recursively
|
---|
14 | * making missing parent dirs, and in it's mode setting of the final
|
---|
15 | * directory 'path'.
|
---|
16 | *
|
---|
17 | * To recursively build all missing intermediate directories, make
|
---|
18 | * sure that (flags & FILEUTILS_RECUR) is non-zero. Newly created
|
---|
19 | * intermediate directories will have at least u+wx perms.
|
---|
20 | *
|
---|
21 | * To set specific permissions on 'path', pass the appropriate 'mode'
|
---|
22 | * val. Otherwise, pass -1 to get default permissions.
|
---|
23 | */
|
---|
24 |
|
---|
25 | #include "libbb.h"
|
---|
26 |
|
---|
27 | /* This function is used from NOFORK applets. It must not allocate anything */
|
---|
28 |
|
---|
29 | int bb_make_directory (char *path, long mode, int flags)
|
---|
30 | {
|
---|
31 | mode_t mask;
|
---|
32 | const char *fail_msg;
|
---|
33 | char *s = path;
|
---|
34 | char c;
|
---|
35 | struct stat st;
|
---|
36 |
|
---|
37 | mask = umask(0);
|
---|
38 | if (mode == -1) {
|
---|
39 | umask(mask);
|
---|
40 | mode = (S_IXUSR | S_IXGRP | S_IXOTH |
|
---|
41 | S_IWUSR | S_IWGRP | S_IWOTH |
|
---|
42 | S_IRUSR | S_IRGRP | S_IROTH) & ~mask;
|
---|
43 | } else {
|
---|
44 | umask(mask & ~0300);
|
---|
45 | }
|
---|
46 |
|
---|
47 | do {
|
---|
48 | c = 0;
|
---|
49 |
|
---|
50 | if (flags & FILEUTILS_RECUR) { /* Get the parent. */
|
---|
51 | /* Bypass leading non-'/'s and then subsequent '/'s. */
|
---|
52 | while (*s) {
|
---|
53 | if (*s == '/') {
|
---|
54 | do {
|
---|
55 | ++s;
|
---|
56 | } while (*s == '/');
|
---|
57 | c = *s; /* Save the current char */
|
---|
58 | *s = 0; /* and replace it with nul. */
|
---|
59 | break;
|
---|
60 | }
|
---|
61 | ++s;
|
---|
62 | }
|
---|
63 | }
|
---|
64 |
|
---|
65 | if (mkdir(path, 0777) < 0) {
|
---|
66 | /* If we failed for any other reason than the directory
|
---|
67 | * already exists, output a diagnostic and return -1.*/
|
---|
68 | if (errno != EEXIST
|
---|
69 | || !(flags & FILEUTILS_RECUR)
|
---|
70 | || (stat(path, &st) < 0 || !S_ISDIR(st.st_mode))) {
|
---|
71 | fail_msg = "create";
|
---|
72 | umask(mask);
|
---|
73 | break;
|
---|
74 | }
|
---|
75 | /* Since the directory exists, don't attempt to change
|
---|
76 | * permissions if it was the full target. Note that
|
---|
77 | * this is not an error conditon. */
|
---|
78 | if (!c) {
|
---|
79 | umask(mask);
|
---|
80 | return 0;
|
---|
81 | }
|
---|
82 | }
|
---|
83 |
|
---|
84 | if (!c) {
|
---|
85 | /* Done. If necessary, updated perms on the newly
|
---|
86 | * created directory. Failure to update here _is_
|
---|
87 | * an error.*/
|
---|
88 | umask(mask);
|
---|
89 | if ((mode != -1) && (chmod(path, mode) < 0)){
|
---|
90 | fail_msg = "set permissions of";
|
---|
91 | break;
|
---|
92 | }
|
---|
93 | return 0;
|
---|
94 | }
|
---|
95 |
|
---|
96 | /* Remove any inserted nul from the path (recursive mode). */
|
---|
97 | *s = c;
|
---|
98 |
|
---|
99 | } while (1);
|
---|
100 |
|
---|
101 | bb_perror_msg("cannot %s directory '%s'", fail_msg, path);
|
---|
102 | return -1;
|
---|
103 | }
|
---|