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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