[821] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * parse_mode implementation for busybox
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| 4 | *
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| 5 | * Copyright (C) 2003 Manuel Novoa III <mjn3@codepoet.org>
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| 6 | *
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| 7 | * This program is free software; you can redistribute it and/or modify
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| 8 | * it under the terms of the GNU General Public License as published by
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| 9 | * the Free Software Foundation; either version 2 of the License, or
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| 10 | * (at your option) any later version.
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| 11 | *
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| 12 | * This program is distributed in the hope that it will be useful,
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 15 | * General Public License for more details.
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| 16 | *
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| 17 | * You should have received a copy of the GNU General Public License
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| 18 | * along with this program; if not, write to the Free Software
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| 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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| 20 | *
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| 21 | */
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| 22 |
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| 23 | /* Mar 5, 2003 Manuel Novoa III
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| 24 | *
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| 25 | * This is the main work function for the 'mkdir' applet. As such, it
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| 26 | * strives to be SUSv3 compliant in it's behaviour when recursively
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| 27 | * making missing parent dirs, and in it's mode setting of the final
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| 28 | * directory 'path'.
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| 29 | *
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| 30 | * To recursively build all missing intermediate directories, make
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| 31 | * sure that (flags & FILEUTILS_RECUR) is non-zero. Newly created
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| 32 | * intermediate directories will have at least u+wx perms.
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| 33 | *
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| 34 | * To set specific permissions on 'path', pass the appropriate 'mode'
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| 35 | * val. Otherwise, pass -1 to get default permissions.
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| 36 | */
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| 37 |
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| 38 | #include <errno.h>
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| 39 | #include <unistd.h>
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| 40 | #include <sys/stat.h>
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| 41 | #include "libbb.h"
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| 42 |
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| 43 | int bb_make_directory (char *path, long mode, int flags)
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| 44 | {
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| 45 | mode_t mask;
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| 46 | const char *fail_msg;
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| 47 | char *s = path;
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| 48 | char c;
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| 49 | struct stat st;
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| 50 |
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| 51 | mask = umask(0);
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| 52 | if (mode == -1) {
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| 53 | umask(mask);
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| 54 | mode = (S_IXUSR | S_IXGRP | S_IXOTH |
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| 55 | S_IWUSR | S_IWGRP | S_IWOTH |
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| 56 | S_IRUSR | S_IRGRP | S_IROTH) & ~mask;
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| 57 | } else {
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| 58 | umask(mask & ~0300);
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| 59 | }
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| 60 |
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| 61 | do {
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| 62 | c = 0;
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| 63 |
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| 64 | if (flags & FILEUTILS_RECUR) { /* Get the parent. */
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| 65 | /* Bypass leading non-'/'s and then subsequent '/'s. */
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| 66 | while (*s) {
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| 67 | if (*s == '/') {
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| 68 | do {
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| 69 | ++s;
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| 70 | } while (*s == '/');
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| 71 | c = *s; /* Save the current char */
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| 72 | *s = 0; /* and replace it with nul. */
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| 73 | break;
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| 74 | }
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| 75 | ++s;
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| 76 | }
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| 77 | }
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| 78 |
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| 79 | if (mkdir(path, 0777) < 0) {
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| 80 | /* If we failed for any other reason than the directory
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| 81 | * already exists, output a diagnostic and return -1.*/
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| 82 | if (errno != EEXIST
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| 83 | || !(flags & FILEUTILS_RECUR)
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| 84 | || (stat(path, &st) < 0 || !S_ISDIR(st.st_mode))) {
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| 85 | fail_msg = "create";
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| 86 | umask(mask);
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| 87 | break;
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| 88 | }
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| 89 | /* Since the directory exists, don't attempt to change
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| 90 | * permissions if it was the full target. Note that
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| 91 | * this is not an error conditon. */
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| 92 | if (!c) {
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| 93 | umask(mask);
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| 94 | return 0;
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| 95 | }
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| 96 | }
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| 97 |
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| 98 | if (!c) {
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| 99 | /* Done. If necessary, updated perms on the newly
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| 100 | * created directory. Failure to update here _is_
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| 101 | * an error.*/
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| 102 | umask(mask);
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| 103 | if ((mode != -1) && (chmod(path, mode) < 0)){
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| 104 | fail_msg = "set permissions of";
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| 105 | break;
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| 106 | }
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| 107 | return 0;
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| 108 | }
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| 109 |
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| 110 | /* Remove any inserted nul from the path (recursive mode). */
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| 111 | *s = c;
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| 112 |
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| 113 | } while (1);
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| 114 |
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| 115 | bb_perror_msg ("Cannot %s directory `%s'", fail_msg, path);
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| 116 | return -1;
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| 117 | }
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