scoutos / prex-0.9.0 / usr / server / fs / fatfs / fatfs_subr.c @ 03e9c04a
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1 | 03e9c04a | Brad Neuman | /*
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2 | * Copyright (c) 2005-2008, Kohsuke Ohtani
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3 | * All rights reserved.
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4 | *
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5 | * Redistribution and use in source and binary forms, with or without
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6 | * modification, are permitted provided that the following conditions
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7 | * are met:
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8 | * 1. Redistributions of source code must retain the above copyright
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9 | * notice, this list of conditions and the following disclaimer.
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10 | * 2. Redistributions in binary form must reproduce the above copyright
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11 | * notice, this list of conditions and the following disclaimer in the
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12 | * documentation and/or other materials provided with the distribution.
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13 | * 3. Neither the name of the author nor the names of any co-contributors
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14 | * may be used to endorse or promote products derived from this software
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15 | * without specific prior written permission.
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16 | *
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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27 | * SUCH DAMAGE.
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28 | */
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29 | |||
30 | #include <sys/prex.h> |
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31 | |||
32 | #include <ctype.h> |
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33 | #include <string.h> |
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34 | #include <unistd.h> |
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35 | #include <errno.h> |
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36 | #include <stdlib.h> |
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37 | |||
38 | #include "fatfs.h" |
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39 | |||
40 | |||
41 | /*
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42 | * Convert file name to 8.3 format
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43 | * Ex. "foo.bar" => "foo bar"
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44 | */
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45 | void
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46 | fat_convert_name(char *org, char *name) |
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47 | { |
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48 | int i;
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49 | |||
50 | memset(name, (int)' ', 11); |
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51 | for (i = 0; i <= 11; i++) { |
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52 | if (!*org)
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53 | break;
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54 | if (*org == '/') |
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55 | break;
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56 | if (*org == '.') { |
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57 | i = 7;
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58 | org++; |
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59 | continue;
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60 | } |
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61 | *(name + i) = *org; |
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62 | org++; |
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63 | } |
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64 | } |
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65 | |||
66 | /*
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67 | * Restore file name to normal format
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68 | * Ex. "foo bar" => "foo.bar"
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69 | */
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70 | void
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71 | fat_restore_name(char *org, char *name) |
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72 | { |
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73 | int i;
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74 | |||
75 | memset(name, 0, 13); |
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76 | for (i = 0; i < 8; i++) { |
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77 | if (*org != ' ') |
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78 | *name++ = *org; |
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79 | org++; |
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80 | } |
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81 | if (*org != ' ') |
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82 | *name++ = '.';
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83 | for (i = 0; i < 3; i++) { |
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84 | if (*org != ' ') |
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85 | *name++ = *org; |
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86 | org++; |
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87 | } |
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88 | } |
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89 | |||
90 | /*
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91 | * Compare 2 file names.
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92 | *
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93 | * Return 0 if it matches.
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94 | */
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95 | int
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96 | fat_compare_name(char *n1, char *n2) |
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97 | { |
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98 | int i;
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99 | |||
100 | for (i = 0; i < 11; i++, n1++, n2++) { |
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101 | if (toupper((int)*n1) != toupper((int)*n2)) |
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102 | return -1; |
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103 | } |
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104 | return 0; |
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105 | } |
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106 | |||
107 | /*
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108 | * Check specified name is valid as FAT file name.
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109 | * Return true if valid.
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110 | */
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111 | int
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112 | fat_valid_name(char *name)
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113 | { |
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114 | static char invalid_char[] = "*?<>|\"+=,;[] \345"; |
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115 | int len = 0; |
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116 | |||
117 | /* . or .. */
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118 | if (*name == '.') { |
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119 | name++; |
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120 | if (*name == '.') |
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121 | name++; |
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122 | return (*(name + 1) == '\0') ? 1 : 0; |
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123 | } |
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124 | /* First char must be alphabet or numeric */
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125 | if (!isalnum((int)*name)) |
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126 | return 0; |
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127 | while (*name != '\0') { |
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128 | if (strchr(invalid_char, *name))
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129 | return 0; |
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130 | if (*name == '.') |
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131 | break; /* Start of extension */ |
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132 | if (++len > 8) |
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133 | return 0; /* Too long name */ |
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134 | name++; |
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135 | } |
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136 | if (*name == '\0') |
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137 | return 1; |
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138 | name++; |
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139 | if (*name == '\0') /* Empty extension */ |
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140 | return 1; |
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141 | len = 0;
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142 | while (*name != '\0') { |
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143 | if (strchr(invalid_char, *name))
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144 | return 0; |
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145 | if (*name == '.') |
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146 | return 0; /* Second extention */ |
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147 | if (++len > 3) |
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148 | return 0; /* Too long name */ |
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149 | name++; |
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150 | } |
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151 | return 1; |
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152 | } |
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153 | |||
154 | /*
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155 | * mode -> attribute
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156 | */
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157 | void
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158 | fat_mode_to_attr(mode_t mode, u_char *attr) |
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159 | { |
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160 | |||
161 | *attr = 0;
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162 | if (!(mode & S_IWRITE))
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163 | *attr |= FA_RDONLY; |
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164 | if (!(mode & S_IREAD))
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165 | *attr |= FA_HIDDEN; |
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166 | if (S_ISDIR(mode))
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167 | *attr |= FA_SUBDIR; |
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168 | } |
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169 | |||
170 | /*
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171 | * attribute -> mode
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172 | */
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173 | void
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174 | fat_attr_to_mode(u_char attr, mode_t *mode) |
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175 | { |
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176 | |||
177 | if (attr & FA_RDONLY)
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178 | *mode = |
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179 | S_IRUSR | S_IXUSR | S_IRGRP | S_IXGRP | S_IROTH | |
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180 | S_IXOTH; |
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181 | else
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182 | *mode = S_IRWXU | S_IRWXG | S_IRWXO; |
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183 | |||
184 | if (attr & FA_SUBDIR)
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185 | *mode |= S_IFDIR; |
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186 | else
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187 | *mode |= S_IFREG; |
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188 | } |