source: MondoRescue/branches/2.2.9/mindi-busybox/libbb/make_directory.c@ 2725

Last change on this file since 2725 was 2725, checked in by Bruno Cornec, 13 years ago
  • Update mindi-busybox to 1.18.3 to avoid problems with the tar command which is now failing on recent versions with busybox 1.7.3
File size: 3.2 KB
Line 
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 source tree.
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
29int FAST_FUNC bb_make_directory(char *path, long mode, int flags)
30{
31 mode_t cur_mask;
32 mode_t org_mask;
33 const char *fail_msg;
34 char *s;
35 char c;
36 struct stat st;
37
38 /* Happens on bb_make_directory(dirname("no_slashes"),...) */
39 if (LONE_CHAR(path, '.'))
40 return 0;
41
42 org_mask = cur_mask = (mode_t)-1L;
43 s = path;
44 while (1) {
45 c = '\0';
46
47 if (flags & FILEUTILS_RECUR) { /* Get the parent */
48 /* Bypass leading non-'/'s and then subsequent '/'s */
49 while (*s) {
50 if (*s == '/') {
51 do {
52 ++s;
53 } while (*s == '/');
54 c = *s; /* Save the current char */
55 *s = '\0'; /* and replace it with nul */
56 break;
57 }
58 ++s;
59 }
60 }
61
62 if (c != '\0') {
63 /* Intermediate dirs: must have wx for user */
64 if (cur_mask == (mode_t)-1L) { /* wasn't done yet? */
65 mode_t new_mask;
66 org_mask = umask(0);
67 cur_mask = 0;
68 /* Clear u=wx in umask - this ensures
69 * they won't be cleared on mkdir */
70 new_mask = (org_mask & ~(mode_t)0300);
71 //bb_error_msg("org_mask:%o cur_mask:%o", org_mask, new_mask);
72 if (new_mask != cur_mask) {
73 cur_mask = new_mask;
74 umask(new_mask);
75 }
76 }
77 } else {
78 /* Last component: uses original umask */
79 //bb_error_msg("1 org_mask:%o", org_mask);
80 if (org_mask != cur_mask) {
81 cur_mask = org_mask;
82 umask(org_mask);
83 }
84 }
85
86 if (mkdir(path, 0777) < 0) {
87 /* If we failed for any other reason than the directory
88 * already exists, output a diagnostic and return -1 */
89 if ((errno != EEXIST && errno != EISDIR)
90 || !(flags & FILEUTILS_RECUR)
91 || ((stat(path, &st) < 0) || !S_ISDIR(st.st_mode))
92 ) {
93 fail_msg = "create";
94 break;
95 }
96 /* Since the directory exists, don't attempt to change
97 * permissions if it was the full target. Note that
98 * this is not an error condition. */
99 if (!c) {
100 goto ret0;
101 }
102 }
103
104 if (!c) {
105 /* Done. If necessary, update perms on the newly
106 * created directory. Failure to update here _is_
107 * an error. */
108 if ((mode != -1) && (chmod(path, mode) < 0)) {
109 fail_msg = "set permissions of";
110 break;
111 }
112 goto ret0;
113 }
114
115 /* Remove any inserted nul from the path (recursive mode) */
116 *s = c;
117 } /* while (1) */
118
119 bb_perror_msg("can't %s directory '%s'", fail_msg, path);
120 flags = -1;
121 goto ret;
122 ret0:
123 flags = 0;
124 ret:
125 //bb_error_msg("2 org_mask:%o", org_mask);
126 if (org_mask != cur_mask)
127 umask(org_mask);
128 return flags;
129}
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