blob: d540ad133dd913a1b1ab7ec42e01602009623c8e [file] [log] [blame]
Matt Kraaiceeff732001-06-21 19:41:37 +00001/* vi: set sw=4 ts=4: */
2/*
Manuel Novoa III cad53642003-03-19 09:13:01 +00003 * parse_mode implementation for busybox
Matt Kraaiceeff732001-06-21 19:41:37 +00004 *
Manuel Novoa III cad53642003-03-19 09:13:01 +00005 * Copyright (C) 2003 Manuel Novoa III <mjn3@codepoet.org>
Matt Kraaiceeff732001-06-21 19:41:37 +00006 *
"Robert P. J. Day"5d8843e2006-07-10 11:41:19 +00007 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
Matt Kraaiceeff732001-06-21 19:41:37 +00008 */
9
Manuel Novoa III cad53642003-03-19 09:13:01 +000010/* 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 *
Eric Andersenaff114c2004-04-14 17:51:38 +000021 * To set specific permissions on 'path', pass the appropriate 'mode'
22 * val. Otherwise, pass -1 to get default permissions.
Manuel Novoa III cad53642003-03-19 09:13:01 +000023 */
Matt Kraaiceeff732001-06-21 19:41:37 +000024
25#include "libbb.h"
26
Denis Vlasenko99912ca2007-04-10 15:43:37 +000027/* This function is used from NOFORK applets. It must not allocate anything */
28
Manuel Novoa III cad53642003-03-19 09:13:01 +000029int bb_make_directory (char *path, long mode, int flags)
Matt Kraaiceeff732001-06-21 19:41:37 +000030{
Manuel Novoa III cad53642003-03-19 09:13:01 +000031 mode_t mask;
32 const char *fail_msg;
33 char *s = path;
34 char c;
Eric Andersen28426592004-10-08 07:21:58 +000035 struct stat st;
Glenn L McGrath822e7fd2002-11-24 22:48:20 +000036
Manuel Novoa III cad53642003-03-19 09:13:01 +000037 mask = umask(0);
Eric Andersen0e020d12004-10-13 06:25:52 +000038 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 }
Glenn L McGrath822e7fd2002-11-24 22:48:20 +000046
Manuel Novoa III cad53642003-03-19 09:13:01 +000047 do {
48 c = 0;
Glenn L McGrath5b110872002-11-24 23:22:29 +000049
Manuel Novoa III cad53642003-03-19 09:13:01 +000050 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 }
Glenn L McGrath5b110872002-11-24 23:22:29 +000063 }
64
Manuel Novoa III cad53642003-03-19 09:13:01 +000065 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.*/
Eric Andersen28426592004-10-08 07:21:58 +000068 if (errno != EEXIST
69 || !(flags & FILEUTILS_RECUR)
70 || (stat(path, &st) < 0 || !S_ISDIR(st.st_mode))) {
Manuel Novoa III cad53642003-03-19 09:13:01 +000071 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 }
Glenn L McGrath193697d2002-08-24 20:11:38 +000082 }
Glenn L McGrath822e7fd2002-11-24 22:48:20 +000083
Manuel Novoa III cad53642003-03-19 09:13:01 +000084 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
Denis Vlasenkoe1a0d482006-10-20 13:28:22 +0000101 bb_perror_msg ("cannot %s directory '%s'", fail_msg, path);
Manuel Novoa III cad53642003-03-19 09:13:01 +0000102 return -1;
Matt Kraaiceeff732001-06-21 19:41:37 +0000103}