source: branches/2.2.2/mindi-busybox/libbb/make_directory.c @ 1247

Last change on this file since 1247 was 821, checked in by Bruno Cornec, 14 years ago

Addition of busybox 1.2.1 as a mindi-busybox new package
This should avoid delivering binary files in mindi not built there (Fedora and Debian are quite serious about that)

File size: 3.1 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 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 *
21 */
22
23/* Mar 5, 2003    Manuel Novoa III
24 *
25 * This is the main work function for the 'mkdir' applet.  As such, it
26 * strives to be SUSv3 compliant in it's behaviour when recursively
27 * making missing parent dirs, and in it's mode setting of the final
28 * directory 'path'.
29 *
30 * To recursively build all missing intermediate directories, make
31 * sure that (flags & FILEUTILS_RECUR) is non-zero.  Newly created
32 * intermediate directories will have at least u+wx perms.
33 *
34 * To set specific permissions on 'path', pass the appropriate 'mode'
35 * val.  Otherwise, pass -1 to get default permissions.
36 */
37
38#include <errno.h>
39#include <unistd.h>
40#include <sys/stat.h>
41#include "libbb.h"
42
43int bb_make_directory (char *path, long mode, int flags)
44{
45    mode_t mask;
46    const char *fail_msg;
47    char *s = path;
48    char c;
49    struct stat st;
50
51    mask = umask(0);
52    if (mode == -1) {
53        umask(mask);
54        mode = (S_IXUSR | S_IXGRP | S_IXOTH |
55                S_IWUSR | S_IWGRP | S_IWOTH |
56                S_IRUSR | S_IRGRP | S_IROTH) & ~mask;
57    } else {
58        umask(mask & ~0300);
59    }
60
61    do {
62        c = 0;
63
64        if (flags & FILEUTILS_RECUR) {  /* Get the parent. */
65            /* Bypass leading non-'/'s and then subsequent '/'s. */
66            while (*s) {
67                if (*s == '/') {
68                    do {
69                        ++s;
70                    } while (*s == '/');
71                    c = *s;     /* Save the current char */
72                    *s = 0;     /* and replace it with nul. */
73                    break;
74                }
75                ++s;
76            }
77        }
78
79        if (mkdir(path, 0777) < 0) {
80            /* If we failed for any other reason than the directory
81             * already exists, output a diagnostic and return -1.*/
82            if (errno != EEXIST
83                || !(flags & FILEUTILS_RECUR)
84                || (stat(path, &st) < 0 || !S_ISDIR(st.st_mode))) {
85                fail_msg = "create";
86                umask(mask);
87                break;
88            }
89            /* Since the directory exists, don't attempt to change
90             * permissions if it was the full target.  Note that
91             * this is not an error conditon. */
92            if (!c) {
93                umask(mask);
94                return 0;
95            }
96        }
97
98        if (!c) {
99            /* Done.  If necessary, updated perms on the newly
100             * created directory.  Failure to update here _is_
101             * an error.*/
102            umask(mask);
103            if ((mode != -1) && (chmod(path, mode) < 0)){
104                fail_msg = "set permissions of";
105                break;
106            }
107            return 0;
108        }
109
110        /* Remove any inserted nul from the path (recursive mode). */
111        *s = c;
112
113    } while (1);
114
115    bb_perror_msg ("Cannot %s directory `%s'", fail_msg, path);
116    return -1;
117}
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