1 | /* |
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2 | * msdos.h |
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3 | * |
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4 | * The MSDOS filesystem constants/data structures/prototypes |
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5 | * |
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6 | * Copyright (C) 2001 OKTET Ltd., St.-Petersburg, Russia |
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7 | * Author: Eugeny S. Mints <Eugeny.Mints@oktet.ru> |
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8 | * |
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9 | * The license and distribution terms for this file may be |
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10 | * found in the file LICENSE in this distribution or at |
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11 | * http://www.rtems.com/license/LICENSE. |
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12 | * |
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13 | * @(#) $Id$ |
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14 | */ |
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15 | #ifndef __DOSFS_MSDOS_H__ |
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16 | #define __DOSFS_MSDOS_H__ |
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17 | |
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18 | #include <rtems.h> |
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19 | #include <rtems/libio_.h> |
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20 | |
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21 | #include "fat.h" |
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22 | #include "fat_file.h" |
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23 | |
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24 | #ifdef __cplusplus |
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25 | extern "C" { |
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26 | #endif |
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27 | |
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28 | #define MSDOS_NAME_NOT_FOUND_ERR 0x7D01 |
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29 | |
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30 | /* |
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31 | * This structure identifies the instance of the filesystem on the MSDOS |
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32 | * level. |
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33 | */ |
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34 | typedef struct msdos_fs_info_s |
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35 | { |
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36 | fat_fs_info_t fat; /* |
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37 | * volume |
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38 | * description |
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39 | */ |
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40 | const rtems_filesystem_file_handlers_r *directory_handlers; /* |
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41 | * a set of routines |
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42 | * that handles the |
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43 | * nodes of directory |
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44 | * type |
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45 | */ |
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46 | const rtems_filesystem_file_handlers_r *file_handlers; /* |
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47 | * a set of routines |
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48 | * that handles the |
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49 | * nodes of file |
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50 | * type |
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51 | */ |
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52 | rtems_id vol_sema; /* |
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53 | * semaphore |
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54 | * associated with |
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55 | * the volume |
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56 | */ |
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57 | uint8_t *cl_buf; /* |
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58 | * just placeholder |
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59 | * for anything |
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60 | */ |
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61 | } msdos_fs_info_t; |
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62 | |
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63 | /* a set of routines that handle the nodes which are directories */ |
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64 | extern const rtems_filesystem_file_handlers_r msdos_dir_handlers; |
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65 | |
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66 | /* a set of routines that handle the nodes which are files */ |
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67 | extern const rtems_filesystem_file_handlers_r msdos_file_handlers; |
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68 | |
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69 | /* Volume semaphore timeout value. This value can be changed to a number |
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70 | * of ticks to help debugging or if you need such a */ |
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71 | #define MSDOS_VOLUME_SEMAPHORE_TIMEOUT RTEMS_NO_TIMEOUT |
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72 | |
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73 | /* Node types */ |
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74 | #define MSDOS_DIRECTORY RTEMS_FILESYSTEM_DIRECTORY |
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75 | #define MSDOS_REGULAR_FILE RTEMS_FILESYSTEM_MEMORY_FILE |
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76 | #define MSDOS_HARD_LINK RTEMS_FILESYSTEM_HARD_LINK /* pseudo type */ |
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77 | |
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78 | typedef rtems_filesystem_node_types_t msdos_node_type_t; |
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79 | |
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80 | /* |
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81 | * Macros for fetching fields from 32 bytes long FAT Directory Entry |
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82 | * Structure |
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83 | */ |
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84 | #define MSDOS_DIRECTORY_ENTRY_STRUCT_SIZE 32 /* 32 bytes */ |
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85 | |
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86 | #define MSDOS_DIR_NAME(x) (char *)((x) + 0) |
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87 | #define MSDOS_DIR_ENTRY_TYPE(x) (uint8_t *)((x) + 0) |
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88 | #define MSDOS_DIR_ATTR(x) (uint8_t *)((x) + 11) |
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89 | #define MSDOS_DIR_NT_RES(x) (uint8_t *)((x) + 12) |
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90 | #define MSDOS_DIR_LFN_CHECKSUM(x) (uint8_t *)((x) + 13) |
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91 | #define MSDOS_DIR_CRT_TIME_TENTH(x) (uint8_t *)((x) + 13) |
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92 | #define MSDOS_DIR_CRT_TIME(x) (uint16_t *)((x) + 14) |
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93 | #define MSDOS_DIR_CRT_DATE(x) (uint16_t *)((x) + 16) |
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94 | #define MSDOS_DIR_LAST_ACCESS_DATE(x) (uint16_t *)((x) + 18) |
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95 | #define MSDOS_DIR_FIRST_CLUSTER_HI(x) (uint16_t *)((x) + 20) |
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96 | #define MSDOS_DIR_WRITE_TIME(x) (uint16_t *)((x) + 22) |
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97 | #define MSDOS_DIR_WRITE_DATE(x) (uint16_t *)((x) + 24) |
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98 | #define MSDOS_DIR_FIRST_CLUSTER_LOW(x) (uint16_t *)((x) + 26) |
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99 | #define MSDOS_DIR_FILE_SIZE(x) (uint32_t *)((x) + 28) |
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100 | |
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101 | #define MSDOS_EXTRACT_CLUSTER_NUM(p) \ |
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102 | (uint32_t)( (CF_LE_W(*MSDOS_DIR_FIRST_CLUSTER_LOW(p))) | \ |
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103 | ((uint32_t)(CF_LE_W((*MSDOS_DIR_FIRST_CLUSTER_HI(p))))<<16) ) |
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104 | |
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105 | /* |
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106 | * Fields offset in 32 bytes long FAT Directory Entry |
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107 | * Structure |
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108 | */ |
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109 | #define MSDOS_FILE_SIZE_OFFSET 28 |
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110 | #define MSDOS_FILE_NAME_OFFSET 0 |
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111 | #define MSDOS_FIRST_CLUSTER_HI_OFFSET 20 |
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112 | #define MSDOS_FIRST_CLUSTER_LOW_OFFSET 26 |
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113 | #define MSDOS_FILE_WDATE_OFFSET 24 |
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114 | #define MSDOS_FILE_WTIME_OFFSET 22 |
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115 | |
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116 | /* |
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117 | * Possible values of DIR_Attr field of 32 bytes long FAT Directory Entry |
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118 | * Structure |
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119 | */ |
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120 | #define MSDOS_ATTR_READ_ONLY 0x01 |
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121 | #define MSDOS_ATTR_HIDDEN 0x02 |
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122 | #define MSDOS_ATTR_SYSTEM 0x04 |
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123 | #define MSDOS_ATTR_VOLUME_ID 0x08 |
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124 | #define MSDOS_ATTR_DIRECTORY 0x10 |
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125 | #define MSDOS_ATTR_ARCHIVE 0x20 |
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126 | #define MSDOS_ATTR_LFN (MSDOS_ATTR_READ_ONLY | \ |
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127 | MSDOS_ATTR_HIDDEN | \ |
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128 | MSDOS_ATTR_SYSTEM | \ |
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129 | MSDOS_ATTR_VOLUME_ID) |
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130 | #define MSDOS_ATTR_LFN_MASK (MSDOS_ATTR_READ_ONLY | \ |
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131 | MSDOS_ATTR_HIDDEN | \ |
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132 | MSDOS_ATTR_SYSTEM | \ |
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133 | MSDOS_ATTR_VOLUME_ID | \ |
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134 | MSDOS_ATTR_DIRECTORY | \ |
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135 | MSDOS_ATTR_ARCHIVE) |
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136 | |
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137 | #define MSDOS_LAST_LONG_ENTRY 0x40 |
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138 | #define MSDOS_LAST_LONG_ENTRY_MASK 0x3F |
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139 | |
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140 | #define MSDOS_DT_2SECONDS_MASK 0x1F /* seconds divided by 2 */ |
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141 | #define MSDOS_DT_2SECONDS_SHIFT 0 |
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142 | #define MSDOS_DT_MINUTES_MASK 0x7E0 /* minutes */ |
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143 | #define MSDOS_DT_MINUTES_SHIFT 5 |
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144 | #define MSDOS_DT_HOURS_MASK 0xF800 /* hours */ |
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145 | #define MSDOS_DT_HOURS_SHIFT 11 |
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146 | |
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147 | #define MSDOS_DD_DAY_MASK 0x1F /* day of month */ |
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148 | #define MSDOS_DD_DAY_SHIFT 0 |
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149 | #define MSDOS_DD_MONTH_MASK 0x1E0 /* month */ |
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150 | #define MSDOS_DD_MONTH_SHIFT 5 |
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151 | #define MSDOS_DD_YEAR_MASK 0xFE00 /* year - 1980 */ |
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152 | #define MSDOS_DD_YEAR_SHIFT 9 |
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153 | |
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154 | |
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155 | /* |
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156 | * Possible values of DIR_Name[0] field of 32 bytes long FAT Directory Entry |
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157 | * Structure |
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158 | */ |
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159 | #define MSDOS_THIS_DIR_ENTRY_EMPTY 0xE5 |
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160 | #define MSDOS_THIS_DIR_ENTRY_AND_REST_EMPTY 0x00 |
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161 | |
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162 | /* |
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163 | * Number of characters per directory entry for a long filename. |
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164 | */ |
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165 | #define MSDOS_LFN_LEN_PER_ENTRY (13) |
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166 | |
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167 | /* |
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168 | * Macros for names parsing and formatting |
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169 | */ |
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170 | #define msdos_is_separator(_ch) rtems_filesystem_is_separator(_ch) |
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171 | |
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172 | #define MSDOS_SHORT_BASE_LEN 8 /* 8 characters */ |
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173 | #define MSDOS_SHORT_EXT_LEN 3 /* 3 characters */ |
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174 | #define MSDOS_SHORT_NAME_LEN (MSDOS_SHORT_BASE_LEN+\ |
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175 | MSDOS_SHORT_EXT_LEN) /* 11 chars */ |
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176 | #define MSDOS_NAME_MAX_LNF_LEN (255) |
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177 | #define MSDOS_NAME_MAX MSDOS_SHORT_NAME_LEN |
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178 | #define MSDOS_NAME_MAX_WITH_DOT (MSDOS_NAME_MAX + 1) |
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179 | #define MSDOS_NAME_MAX_LFN_WITH_DOT (260) |
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180 | |
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181 | |
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182 | extern const char const* MSDOS_DOT_NAME; /* ".", padded to MSDOS_NAME chars */ |
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183 | extern const char const* MSDOS_DOTDOT_NAME; /* ".", padded to MSDOS_NAME chars */ |
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184 | |
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185 | typedef enum msdos_name_types_e |
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186 | { |
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187 | MSDOS_NAME_INVALID = 0, /* Unknown name type. Has invalid characters. */ |
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188 | MSDOS_NAME_SHORT, /* Name can be short. */ |
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189 | MSDOS_NAME_LONG /* Name is long; cannot be short. */ |
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190 | } msdos_name_type_t; |
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191 | |
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192 | typedef enum msdos_token_types_e |
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193 | { |
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194 | MSDOS_NO_MORE_PATH, |
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195 | MSDOS_CURRENT_DIR, |
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196 | MSDOS_UP_DIR, |
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197 | MSDOS_NAME, |
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198 | MSDOS_INVALID_TOKEN |
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199 | } msdos_token_types_t; |
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200 | |
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201 | /* Others macros */ |
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202 | #define MSDOS_RES_NT_VALUE 0x00 |
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203 | #define MSDOS_INIT_DIR_SIZE 0x00 |
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204 | |
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205 | /* "dot" entry offset in a directory */ |
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206 | #define MSDOS_DOT_DIR_ENTRY_OFFSET 0x00 /* first entry in directory */ |
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207 | |
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208 | /* "dotdot" entry offset in a directory */ |
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209 | #define MSDOS_DOTDOT_DIR_ENTRY_OFFSET 0x20 /* second entry in directory */ |
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210 | |
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211 | /* 'p' should be char* */ |
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212 | #define DOT_NODE_P(p) ((char *)(p)) |
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213 | #define DOTDOT_NODE_P(p) ((char *)((p) + MSDOS_DIRECTORY_ENTRY_STRUCT_SIZE)) |
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214 | |
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215 | /* Size limits for files and directories */ |
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216 | #define MSDOS_MAX_DIR_LENGHT 0x200000 /* 2,097,152 bytes */ |
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217 | #define MSDOS_MAX_FILE_SIZE 0xFFFFFFFF /* 4 Gb */ |
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218 | |
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219 | /* |
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220 | * The number of 32 bytes long FAT Directory Entry |
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221 | * Structures per 512 bytes sector |
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222 | */ |
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223 | #define MSDOS_DPS512_NUM 16 |
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224 | |
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225 | /* Prototypes */ |
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226 | int msdos_shut_down(rtems_filesystem_mount_table_entry_t *temp_mt_entry); |
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227 | |
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228 | int msdos_eval_path( |
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229 | const char *pathname, /* IN */ |
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230 | size_t pathnamelen, /* IN */ |
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231 | int flags, /* IN */ |
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232 | rtems_filesystem_location_info_t *pathloc /* IN/OUT */ |
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233 | ); |
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234 | |
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235 | int msdos_eval4make( |
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236 | const char *path, /* IN */ |
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237 | rtems_filesystem_location_info_t *pathloc, /* IN/OUT */ |
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238 | const char **name /* OUT */ |
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239 | ); |
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240 | |
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241 | int msdos_unlink(rtems_filesystem_location_info_t *pathloc /* IN */); |
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242 | |
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243 | int msdos_free_node_info(rtems_filesystem_location_info_t *pathloc /* IN */); |
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244 | |
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245 | int msdos_node_type(rtems_filesystem_location_info_t *pathloc); |
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246 | |
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247 | int msdos_mknod( |
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248 | const char *path, /* IN */ |
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249 | mode_t mode, /* IN */ |
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250 | dev_t dev, /* IN */ |
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251 | rtems_filesystem_location_info_t *pathloc /* IN/OUT */ |
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252 | ); |
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253 | |
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254 | int msdos_utime( |
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255 | rtems_filesystem_location_info_t *pathloc, /* IN */ |
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256 | time_t actime, /* IN */ |
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257 | time_t modtime /* IN */ |
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258 | ); |
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259 | |
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260 | int msdos_rename(rtems_filesystem_location_info_t *old_parent_loc, |
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261 | rtems_filesystem_location_info_t *old_loc, |
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262 | rtems_filesystem_location_info_t *new_parent_loc, |
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263 | const char *new_name); |
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264 | |
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265 | int msdos_initialize_support( |
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266 | rtems_filesystem_mount_table_entry_t *temp_mt_entry, |
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267 | const rtems_filesystem_operations_table *op_table, |
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268 | const rtems_filesystem_file_handlers_r *file_handlers, |
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269 | const rtems_filesystem_file_handlers_r *directory_handlers |
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270 | ); |
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271 | |
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272 | int msdos_file_open( |
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273 | rtems_libio_t *iop, /* IN */ |
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274 | const char *pathname, /* IN */ |
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275 | uint32_t flag, /* IN */ |
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276 | uint32_t mode /* IN */ |
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277 | ); |
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278 | |
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279 | int msdos_file_close(rtems_libio_t *iop /* IN */); |
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280 | |
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281 | ssize_t msdos_file_read( |
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282 | rtems_libio_t *iop, /* IN */ |
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283 | void *buffer, /* IN */ |
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284 | size_t count /* IN */ |
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285 | ); |
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286 | |
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287 | ssize_t msdos_file_write( |
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288 | rtems_libio_t *iop, /* IN */ |
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289 | const void *buffer, /* IN */ |
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290 | size_t count /* IN */ |
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291 | ); |
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292 | |
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293 | rtems_off64_t msdos_file_lseek( |
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294 | rtems_libio_t *iop, /* IN */ |
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295 | rtems_off64_t offset, /* IN */ |
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296 | int whence /* IN */ |
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297 | ); |
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298 | |
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299 | int msdos_file_stat( |
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300 | rtems_filesystem_location_info_t *loc, /* IN */ |
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301 | struct stat *buf /* OUT */ |
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302 | ); |
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303 | |
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304 | int |
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305 | msdos_file_ftruncate( |
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306 | rtems_libio_t *iop, /* IN */ |
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307 | rtems_off64_t length /* IN */ |
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308 | ); |
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309 | |
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310 | int msdos_file_sync(rtems_libio_t *iop); |
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311 | |
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312 | int msdos_file_datasync(rtems_libio_t *iop); |
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313 | |
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314 | int msdos_file_ioctl( |
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315 | rtems_libio_t *iop, /* IN */ |
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316 | uint32_t command, /* IN */ |
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317 | void *buffer /* IN */ |
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318 | ); |
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319 | |
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320 | int |
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321 | msdos_dir_chmod( |
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322 | rtems_filesystem_location_info_t *pathloc, /* IN */ |
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323 | mode_t mode /* IN */ |
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324 | ); |
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325 | |
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326 | int msdos_file_rmnod(rtems_filesystem_location_info_t *parent_pathloc, /* IN */ |
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327 | rtems_filesystem_location_info_t *pathloc /* IN */); |
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328 | |
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329 | int msdos_dir_open( |
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330 | rtems_libio_t *iop, /* IN */ |
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331 | const char *pathname, /* IN */ |
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332 | uint32_t flag, /* IN */ |
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333 | uint32_t mode /* IN */ |
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334 | ); |
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335 | |
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336 | int msdos_dir_close(rtems_libio_t *iop /* IN */); |
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337 | |
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338 | ssize_t msdos_dir_read( |
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339 | rtems_libio_t *iop, /* IN */ |
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340 | void *buffer, /* IN */ |
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341 | size_t count /* IN */ |
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342 | ); |
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343 | |
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344 | rtems_off64_t msdos_dir_lseek( |
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345 | rtems_libio_t *iop, /* IN */ |
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346 | rtems_off64_t offset, /* IN */ |
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347 | int whence /* IN */ |
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348 | ); |
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349 | |
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350 | int |
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351 | msdos_file_chmod( |
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352 | rtems_filesystem_location_info_t *pathloc, /* IN */ |
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353 | mode_t mode /* IN */ |
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354 | ); |
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355 | |
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356 | int msdos_dir_rmnod(rtems_filesystem_location_info_t *parent_pathloc, /* IN */ |
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357 | rtems_filesystem_location_info_t *pathloc /* IN */); |
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358 | |
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359 | int msdos_dir_sync(rtems_libio_t *iop); |
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360 | |
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361 | int msdos_dir_stat( |
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362 | rtems_filesystem_location_info_t *loc, /* IN */ |
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363 | struct stat *buf /* OUT */ |
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364 | ); |
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365 | |
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366 | int msdos_creat_node(rtems_filesystem_location_info_t *parent_loc, |
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367 | msdos_node_type_t type, |
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368 | const char *name, |
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369 | int name_len, |
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370 | mode_t mode, |
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371 | const fat_file_fd_t *link_fd); |
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372 | |
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373 | /* Misc prototypes */ |
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374 | msdos_token_types_t msdos_get_token(const char *path, |
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375 | int pathlen, |
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376 | const char **token, |
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377 | int *token_len); |
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378 | |
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379 | int msdos_find_name( |
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380 | rtems_filesystem_location_info_t *parent_loc, |
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381 | const char *name, |
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382 | int name_len |
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383 | ); |
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384 | |
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385 | int msdos_get_name_node( |
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386 | rtems_filesystem_location_info_t *parent_loc, |
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387 | bool create_node, |
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388 | const char *name, |
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389 | int name_len, |
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390 | msdos_name_type_t name_type, |
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391 | fat_dir_pos_t *dir_pos, |
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392 | char *name_dir_entry |
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393 | ); |
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394 | |
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395 | int msdos_dir_info_remove(rtems_filesystem_location_info_t *pathloc); |
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396 | |
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397 | msdos_name_type_t msdos_long_to_short(const char *lfn, int lfn_len, |
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398 | char* sfn, int sfn_len); |
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399 | |
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400 | int msdos_filename_unix2dos(const char *un, int unlen, char *dn); |
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401 | |
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402 | void msdos_date_unix2dos( |
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403 | unsigned int tsp, uint16_t *ddp, |
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404 | uint16_t *dtp); |
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405 | |
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406 | unsigned int msdos_date_dos2unix(unsigned int dd, unsigned int dt); |
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407 | |
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408 | int msdos_set_first_cluster_num( |
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409 | rtems_filesystem_mount_table_entry_t *mt_entry, |
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410 | fat_file_fd_t *fat_fd |
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411 | ); |
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412 | |
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413 | int msdos_set_file_size( |
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414 | rtems_filesystem_mount_table_entry_t *mt_entry, |
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415 | fat_file_fd_t *fat_fd |
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416 | ); |
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417 | |
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418 | int msdos_set_first_char4file_name( |
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419 | rtems_filesystem_mount_table_entry_t *mt_entry, |
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420 | fat_dir_pos_t *dir_pos, |
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421 | unsigned char first_char |
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422 | ); |
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423 | |
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424 | int msdos_set_dir_wrt_time_and_date( |
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425 | rtems_filesystem_mount_table_entry_t *mt_entry, |
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426 | fat_file_fd_t *fat_fd |
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427 | ); |
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428 | |
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429 | |
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430 | int msdos_dir_is_empty( |
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431 | rtems_filesystem_mount_table_entry_t *mt_entry, |
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432 | fat_file_fd_t *fat_fd, |
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433 | bool *ret_val |
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434 | ); |
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435 | |
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436 | int msdos_find_name_in_fat_file( |
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437 | rtems_filesystem_mount_table_entry_t *mt_entry, |
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438 | fat_file_fd_t *fat_fd, |
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439 | bool create_node, |
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440 | const char *name, |
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441 | int name_len, |
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442 | msdos_name_type_t name_type, |
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443 | fat_dir_pos_t *dir_pos, |
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444 | char *name_dir_entry |
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445 | ); |
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446 | |
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447 | int msdos_find_node_by_cluster_num_in_fat_file( |
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448 | rtems_filesystem_mount_table_entry_t *mt_entry, |
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449 | fat_file_fd_t *fat_fd, |
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450 | uint32_t cl4find, |
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451 | fat_dir_pos_t *dir_pos, |
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452 | char *dir_entry |
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453 | ); |
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454 | |
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455 | int msdos_get_dotdot_dir_info_cluster_num_and_offset( |
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456 | rtems_filesystem_mount_table_entry_t *mt_entry, |
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457 | uint32_t cln, |
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458 | fat_dir_pos_t *dir_pos, |
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459 | char *dir_entry |
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460 | ); |
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461 | |
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462 | #ifdef __cplusplus |
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463 | } |
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464 | #endif |
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465 | |
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466 | #endif /* __DOSFS_MSDOS_H__ */ |
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