[d883ce2] | 1 | /** |
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| 2 | * @file |
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[f36a7bfc] | 3 | * |
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[d883ce2] | 4 | * @brief Miscellaneous Routines Implementation for MSDOS FileSystem |
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| 5 | * @ingroup libfs |
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| 6 | */ |
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| 7 | |
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| 8 | /* |
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[f36a7bfc] | 9 | * Copyright (C) 2001 OKTET Ltd., St.-Petersburg, Russia |
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| 10 | * Author: Eugeny S. Mints <Eugeny.Mints@oktet.ru> |
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| 11 | * |
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[d2e0bb3] | 12 | * Modifications to support UTF-8 in the file system are |
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| 13 | * Copyright (c) 2013 embedded brains GmbH. |
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| 14 | * |
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[f36a7bfc] | 15 | * The license and distribution terms for this file may be |
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| 16 | * found in the file LICENSE in this distribution or at |
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[c499856] | 17 | * http://www.rtems.org/license/LICENSE. |
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[f36a7bfc] | 18 | */ |
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| 19 | |
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[3899a537] | 20 | #define MSDOS_TRACE 1 |
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| 21 | |
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[f36a7bfc] | 22 | #if HAVE_CONFIG_H |
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| 23 | #include "config.h" |
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| 24 | #endif |
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| 25 | |
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| 26 | #include <stdlib.h> |
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[07d6fd5] | 27 | #include <ctype.h> |
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[f36a7bfc] | 28 | #include <sys/time.h> |
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| 29 | #include <unistd.h> |
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| 30 | #include <string.h> |
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| 31 | #include <assert.h> |
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[d2e0bb3] | 32 | #include <errno.h> |
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| 33 | #include <inttypes.h> |
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[f36a7bfc] | 34 | #include <rtems/libio_.h> |
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| 35 | |
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| 36 | #include "fat.h" |
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| 37 | #include "fat_fat_operations.h" |
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| 38 | #include "fat_file.h" |
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| 39 | |
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| 40 | #include "msdos.h" |
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| 41 | |
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[07d6fd5] | 42 | |
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| 43 | #include <stdio.h> |
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| 44 | |
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[83a4cbb] | 45 | #define MSDOS_LFN_ENTRY_SIZE \ |
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| 46 | (MSDOS_LFN_LEN_PER_ENTRY * MSDOS_NAME_LFN_BYTES_PER_CHAR) |
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| 47 | |
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| 48 | #define MSDOS_LFN_ENTRY_SIZE_UTF8 \ |
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| 49 | ((MSDOS_LFN_LEN_PER_ENTRY + 1 ) * MSDOS_NAME_LFN_BYTES_PER_CHAR \ |
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| 50 | * MSDOS_NAME_MAX_UTF8_BYTES_PER_CHAR) |
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| 51 | |
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[07d6fd5] | 52 | /* |
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[a0f3ce2] | 53 | * External strings. Saves space this way. |
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[07d6fd5] | 54 | */ |
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[85b9e7f] | 55 | const char *const MSDOS_DOT_NAME = ". "; |
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| 56 | const char *const MSDOS_DOTDOT_NAME = ".. "; |
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[07d6fd5] | 57 | |
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[3efe749] | 58 | uint8_t |
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| 59 | msdos_lfn_checksum(const void *entry) |
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| 60 | { |
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| 61 | const uint8_t *name; |
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| 62 | uint8_t cs; |
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| 63 | int i; |
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| 64 | |
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| 65 | name = (const uint8_t *) MSDOS_DIR_NAME(entry); |
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| 66 | cs = 0; |
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| 67 | |
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| 68 | for (i = 0; i < MSDOS_SHORT_NAME_LEN; ++i) { |
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| 69 | cs = ((cs & 1) ? 0x80 : 0) + (cs >> 1) + name[i]; |
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| 70 | } |
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| 71 | |
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| 72 | return cs; |
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| 73 | } |
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| 74 | |
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[07d6fd5] | 75 | /* msdos_is_valid_name_char -- |
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| 76 | * Routine to check the character in a file or directory name. |
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| 77 | * The characters support in the short file name are letters, |
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| 78 | * digits, or characters with code points values greater than |
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| 79 | * 127 (not sure what this last is) plus the following special |
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| 80 | * characters "$%'-_@~`!(){}^#&". The must be uppercase. |
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| 81 | * |
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| 82 | * The following 6 characters are allowed in a long names, |
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| 83 | * " +,;=[]" including a space and lower case letters. |
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| 84 | * |
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| 85 | * PARAMETERS: |
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| 86 | * ch - character to check. |
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| 87 | * |
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| 88 | * RETURNS: |
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| 89 | * MSDOS_NAME_INVALID - Not valid in a long or short name. |
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| 90 | * MSDOS_NAME_SHORT - Valid in a short name or long name. |
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| 91 | * MSDOS_NAME_LONG - Valid in a long name only. |
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| 92 | * |
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| 93 | */ |
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| 94 | static msdos_name_type_t |
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| 95 | msdos_is_valid_name_char(const char ch) |
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| 96 | { |
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| 97 | if (strchr(" +,;=[]", ch) != NULL) |
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| 98 | return MSDOS_NAME_LONG; |
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| 99 | |
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[bab5c5fa] | 100 | if ((ch == '.') || isalnum((unsigned char)ch) || |
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[d2e0bb3] | 101 | (strchr("$%'-_@~`!(){}^#&", ch) != NULL) || (unsigned char) ch > 127) |
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[07d6fd5] | 102 | return MSDOS_NAME_SHORT; |
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[0a7278e] | 103 | |
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[07d6fd5] | 104 | return MSDOS_NAME_INVALID; |
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| 105 | } |
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| 106 | |
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| 107 | /* msdos_short_hex_number -- |
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| 108 | * Routine to set the hex number in the SFN. |
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| 109 | * |
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| 110 | * PARAMETERS: |
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| 111 | * name - name to change |
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| 112 | * num - number to set |
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| 113 | * |
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| 114 | * RETURNS: |
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| 115 | * nothing |
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| 116 | * |
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| 117 | */ |
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| 118 | static void |
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[b1daf0f] | 119 | msdos_short_name_hex(char* sfn, uint32_t num) |
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[07d6fd5] | 120 | { |
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| 121 | static const char* hex = "0123456789ABCDEF"; |
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| 122 | char* c = MSDOS_DIR_NAME(sfn); |
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| 123 | int i; |
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[3ae5950] | 124 | for (i = 0; i < 2; i++, c++) |
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[07d6fd5] | 125 | if ((*c == ' ') || (*c == '.')) |
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[3ae5950] | 126 | *c = '_'; |
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[07d6fd5] | 127 | for (i = 0; i < 4; i++, c++) |
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| 128 | *c = hex[(num >> ((3 - i) * 4)) & 0xf]; |
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[3ae5950] | 129 | *c++ = '~'; |
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[43d6a28] | 130 | *c = '1'; |
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[07d6fd5] | 131 | } |
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| 132 | |
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| 133 | /* msdos_name_type -- |
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| 134 | * Routine the type of file name. |
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| 135 | * |
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| 136 | * PARAMETERS: |
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| 137 | * name - name to check |
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| 138 | * |
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| 139 | * RETURNS: |
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| 140 | * true the name is long, else the name is short. |
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| 141 | * |
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| 142 | */ |
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[8f77f8f] | 143 | #define MSDOS_NAME_TYPE_PRINT 0 |
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[07d6fd5] | 144 | static msdos_name_type_t |
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| 145 | msdos_name_type(const char *name, int name_len) |
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| 146 | { |
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| 147 | bool lowercase = false; |
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| 148 | bool uppercase = false; |
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[1b3f7e92] | 149 | int dot_at = -1; |
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[07d6fd5] | 150 | int count = 0; |
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| 151 | |
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| 152 | while (*name && (count < name_len)) |
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| 153 | { |
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[1b3f7e92] | 154 | bool is_dot = *name == '.'; |
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[07d6fd5] | 155 | msdos_name_type_t type = msdos_is_valid_name_char(*name); |
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| 156 | |
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[8f77f8f] | 157 | #if MSDOS_NAME_TYPE_PRINT |
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| 158 | printf ("MSDOS_NAME_TYPE: c:%02x type:%d\n", *name, type); |
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| 159 | #endif |
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[66b8047] | 160 | |
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[07d6fd5] | 161 | if ((type == MSDOS_NAME_INVALID) || (type == MSDOS_NAME_LONG)) |
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| 162 | return type; |
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| 163 | |
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[1b3f7e92] | 164 | if (dot_at >= 0) |
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[07d6fd5] | 165 | { |
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[1b3f7e92] | 166 | if (is_dot || ((count - dot_at) > 3)) |
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[8f77f8f] | 167 | { |
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| 168 | #if MSDOS_NAME_TYPE_PRINT |
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| 169 | printf ("MSDOS_NAME_TYPE: LONG[1]: is_dot:%d, at:%d cnt\n", |
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| 170 | is_dot, dot_at, count); |
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| 171 | #endif |
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[07d6fd5] | 172 | return MSDOS_NAME_LONG; |
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[8f77f8f] | 173 | } |
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[07d6fd5] | 174 | } |
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| 175 | else |
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| 176 | { |
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[1b3f7e92] | 177 | if (count == 8 && !is_dot) |
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[8f77f8f] | 178 | { |
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| 179 | #if MSDOS_NAME_TYPE_PRINT |
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| 180 | printf ("MSDOS_NAME_TYPE: LONG[2]: is_dot:%d, at:%d cnt\n", |
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| 181 | is_dot, dot_at, count); |
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| 182 | #endif |
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[07d6fd5] | 183 | return MSDOS_NAME_LONG; |
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[8f77f8f] | 184 | } |
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[07d6fd5] | 185 | } |
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| 186 | |
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[1b3f7e92] | 187 | if (is_dot) |
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[07d6fd5] | 188 | dot_at = count; |
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| 189 | else if ((*name >= 'A') && (*name <= 'Z')) |
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| 190 | uppercase = true; |
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| 191 | else if ((*name >= 'a') && (*name <= 'z')) |
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| 192 | lowercase = true; |
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[0a7278e] | 193 | |
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[07d6fd5] | 194 | count++; |
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| 195 | name++; |
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| 196 | } |
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| 197 | |
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| 198 | if (lowercase && uppercase) |
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[8f77f8f] | 199 | { |
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| 200 | #if MSDOS_NAME_TYPE_PRINT |
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| 201 | printf ("MSDOS_NAME_TYPE: LONG[3]\n"); |
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| 202 | #endif |
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[07d6fd5] | 203 | return MSDOS_NAME_LONG; |
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[8f77f8f] | 204 | } |
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[66b8047] | 205 | |
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[8f77f8f] | 206 | #if MSDOS_NAME_TYPE_PRINT |
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| 207 | printf ("MSDOS_NAME_TYPE: SHORT[1]\n"); |
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| 208 | #endif |
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[07d6fd5] | 209 | return MSDOS_NAME_SHORT; |
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| 210 | } |
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| 211 | |
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| 212 | /* msdos_long_to_short -- |
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[0a7278e] | 213 | * Routine to creates a short name from a long. Start the end of the |
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[07d6fd5] | 214 | * |
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| 215 | * PARAMETERS: |
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| 216 | * name - name to check |
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| 217 | * |
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| 218 | * RETURNS: |
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| 219 | * true the name is long, else the name is short. |
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| 220 | * |
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| 221 | */ |
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[8f77f8f] | 222 | #define MSDOS_L2S_PRINT 0 |
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[07d6fd5] | 223 | msdos_name_type_t |
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[d2e0bb3] | 224 | msdos_long_to_short(rtems_dosfs_convert_control *converter, |
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| 225 | const char *lfn, |
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| 226 | int lfn_len, |
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| 227 | char *sfn, |
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| 228 | int sfn_len) |
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[07d6fd5] | 229 | { |
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| 230 | msdos_name_type_t type; |
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[d2e0bb3] | 231 | int eno = 0; |
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[07d6fd5] | 232 | int i; |
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[d2e0bb3] | 233 | ssize_t short_filename_length = sfn_len; |
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| 234 | void *buffer = converter->buffer.data; |
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| 235 | size_t codepage_name_len = converter->buffer.size; |
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[07d6fd5] | 236 | |
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| 237 | /* |
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| 238 | * Fill with spaces. This is how a short directory entry is padded. |
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| 239 | */ |
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| 240 | memset (sfn, ' ', sfn_len); |
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| 241 | |
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| 242 | /* |
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| 243 | * Handle '.' and '..' specially. |
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| 244 | */ |
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| 245 | if ((lfn[0] == '.') && (lfn_len == 1)) |
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| 246 | { |
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| 247 | sfn[0] = '.'; |
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[8f77f8f] | 248 | #if MSDOS_L2S_PRINT |
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| 249 | printf ("MSDOS_L2S: SHORT[1]: lfn:'%s' SFN:'%s'\n", lfn, sfn); |
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| 250 | #endif |
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[07d6fd5] | 251 | return MSDOS_NAME_SHORT; |
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| 252 | } |
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[0a7278e] | 253 | |
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[07d6fd5] | 254 | if ((lfn[0] == '.') && (lfn[1] == '.') && (lfn_len == 2)) |
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| 255 | { |
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| 256 | sfn[0] = sfn[1] = '.'; |
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[8f77f8f] | 257 | #if MSDOS_L2S_PRINT |
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| 258 | printf ("MSDOS_L2S: SHORT[2]: lfn:'%s' SFN:'%s'\n", lfn, sfn); |
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| 259 | #endif |
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[07d6fd5] | 260 | return MSDOS_NAME_SHORT; |
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| 261 | } |
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| 262 | |
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| 263 | /* |
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| 264 | * Filenames with only blanks and dots are not allowed! |
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| 265 | */ |
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| 266 | for (i = 0; i < lfn_len; i++) |
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[1b3f7e92] | 267 | if ((lfn[i] != ' ') && (lfn[i] != '.')) |
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[07d6fd5] | 268 | break; |
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| 269 | |
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[1b3f7e92] | 270 | if (i == lfn_len) |
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[8f77f8f] | 271 | { |
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| 272 | #if MSDOS_L2S_PRINT |
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| 273 | printf ("MSDOS_L2S: INVALID[1]: lfn:'%s' SFN:'%s'\n", lfn, sfn); |
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| 274 | #endif |
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[07d6fd5] | 275 | return MSDOS_NAME_INVALID; |
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[8f77f8f] | 276 | } |
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[07d6fd5] | 277 | |
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| 278 | /* |
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| 279 | * Is this a short name ? |
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| 280 | */ |
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[0a7278e] | 281 | |
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[d2e0bb3] | 282 | eno = (*converter->handler->utf8_to_codepage) ( |
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| 283 | converter, |
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| 284 | (const uint8_t*)&lfn[0], |
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| 285 | lfn_len, |
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| 286 | buffer, |
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| 287 | &codepage_name_len); |
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| 288 | if (eno == EINVAL) |
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| 289 | { |
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| 290 | eno = 0; |
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| 291 | type = MSDOS_NAME_LONG; |
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| 292 | } |
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| 293 | else |
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| 294 | { |
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| 295 | type = msdos_name_type ( |
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| 296 | buffer, |
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| 297 | codepage_name_len); |
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| 298 | } |
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[07d6fd5] | 299 | |
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[d2e0bb3] | 300 | if (type != MSDOS_NAME_INVALID) |
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[8f77f8f] | 301 | { |
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[d2e0bb3] | 302 | short_filename_length = msdos_filename_utf8_to_short_name_for_save ( |
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| 303 | converter, |
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| 304 | (const uint8_t*)lfn, |
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| 305 | lfn_len, |
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| 306 | sfn, |
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| 307 | short_filename_length); |
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| 308 | if (short_filename_length < 0 ) { |
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| 309 | type = MSDOS_NAME_INVALID; |
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| 310 | } |
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[8f77f8f] | 311 | #if MSDOS_L2S_PRINT |
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[d2e0bb3] | 312 | printf ("MSDOS_L2S: TYPE:%d lfn:'%s' SFN:'%s'\n", type, lfn, sfn); |
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[8f77f8f] | 313 | #endif |
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| 314 | } |
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[d2e0bb3] | 315 | else |
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| 316 | { |
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[8f77f8f] | 317 | #if MSDOS_L2S_PRINT |
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[d2e0bb3] | 318 | printf ("MSDOS_L2S: INVALID[2]: lfn:'%s' SFN:'%s'\n", lfn, sfn); |
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[8f77f8f] | 319 | #endif |
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[d2e0bb3] | 320 | } |
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| 321 | |
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[07d6fd5] | 322 | return type; |
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| 323 | } |
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| 324 | |
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[f36a7bfc] | 325 | /* msdos_find_name -- |
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[a5305f6b] | 326 | * Find the node which correspondes to the name, open fat-file which |
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| 327 | * correspondes to the found node and close fat-file which correspondes |
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[f36a7bfc] | 328 | * to the node we searched in. |
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| 329 | * |
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| 330 | * PARAMETERS: |
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| 331 | * parent_loc - parent node description |
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| 332 | * name - name to find |
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| 333 | * |
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| 334 | * RETURNS: |
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[a5305f6b] | 335 | * RC_OK and updated 'parent_loc' on success, or -1 if error |
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[f36a7bfc] | 336 | * occured (errno set apropriately) |
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| 337 | * |
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| 338 | */ |
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[a5305f6b] | 339 | int |
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[f36a7bfc] | 340 | msdos_find_name( |
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| 341 | rtems_filesystem_location_info_t *parent_loc, |
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[07d6fd5] | 342 | const char *name, |
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| 343 | int name_len |
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[f36a7bfc] | 344 | ) |
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| 345 | { |
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[07d6fd5] | 346 | int rc = RC_OK; |
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| 347 | msdos_fs_info_t *fs_info = parent_loc->mt_entry->fs_info; |
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| 348 | fat_file_fd_t *fat_fd = NULL; |
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| 349 | msdos_name_type_t name_type; |
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| 350 | fat_dir_pos_t dir_pos; |
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| 351 | unsigned short time_val = 0; |
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| 352 | unsigned short date = 0; |
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| 353 | char node_entry[MSDOS_DIRECTORY_ENTRY_STRUCT_SIZE]; |
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[a5305f6b] | 354 | |
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[f36a7bfc] | 355 | memset(node_entry, 0, MSDOS_DIRECTORY_ENTRY_STRUCT_SIZE); |
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[a5305f6b] | 356 | |
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[d2e0bb3] | 357 | name_type = msdos_long_to_short ( |
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| 358 | fs_info->converter, |
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| 359 | name, |
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| 360 | name_len, |
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| 361 | MSDOS_DIR_NAME(node_entry), |
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| 362 | MSDOS_NAME_MAX); |
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[07d6fd5] | 363 | |
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[a5305f6b] | 364 | /* |
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[d2e0bb3] | 365 | * find the node which corresponds to the name in the directory pointed by |
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[f36a7bfc] | 366 | * 'parent_loc' |
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| 367 | */ |
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[07d6fd5] | 368 | rc = msdos_get_name_node(parent_loc, false, name, name_len, name_type, |
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| 369 | &dir_pos, node_entry); |
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[f36a7bfc] | 370 | if (rc != RC_OK) |
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| 371 | return rc; |
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| 372 | |
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[07d6fd5] | 373 | if (((*MSDOS_DIR_ATTR(node_entry)) & MSDOS_ATTR_VOLUME_ID) || |
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| 374 | ((*MSDOS_DIR_ATTR(node_entry) & MSDOS_ATTR_LFN_MASK) == MSDOS_ATTR_LFN)) |
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| 375 | return MSDOS_NAME_NOT_FOUND_ERR; |
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| 376 | |
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[f36a7bfc] | 377 | /* open fat-file corresponded to the found node */ |
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[c65afce4] | 378 | rc = fat_file_open(&fs_info->fat, &dir_pos, &fat_fd); |
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[f36a7bfc] | 379 | if (rc != RC_OK) |
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| 380 | return rc; |
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[a5305f6b] | 381 | |
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[07d6fd5] | 382 | fat_fd->dir_pos = dir_pos; |
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[0a7278e] | 383 | |
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[f36a7bfc] | 384 | /* |
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[07d6fd5] | 385 | * I don't like this if, but: we should do it, or should write new file |
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[a5305f6b] | 386 | * size and first cluster num to the disk after each write operation |
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[07d6fd5] | 387 | * (even if one byte is written - that is TOO slow) because |
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[a5305f6b] | 388 | * otherwise real values of these fields stored in fat-file descriptor |
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[07d6fd5] | 389 | * may be accidentally rewritten with wrong values stored on the disk |
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[f36a7bfc] | 390 | */ |
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| 391 | if (fat_fd->links_num == 1) |
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| 392 | { |
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| 393 | fat_fd->cln = MSDOS_EXTRACT_CLUSTER_NUM(node_entry); |
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[a5305f6b] | 394 | |
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[f36a7bfc] | 395 | time_val = *MSDOS_DIR_WRITE_TIME(node_entry); |
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| 396 | date = *MSDOS_DIR_WRITE_DATE(node_entry); |
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[a5305f6b] | 397 | |
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[07d6fd5] | 398 | fat_fd->mtime = msdos_date_dos2unix(CF_LE_W(date), CF_LE_W(time_val)); |
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[a5305f6b] | 399 | |
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[a7eaaae8] | 400 | time_val = *MSDOS_DIR_CRT_TIME(node_entry); |
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| 401 | date = *MSDOS_DIR_CRT_DATE(node_entry); |
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| 402 | |
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| 403 | fat_fd->ctime = msdos_date_dos2unix(CF_LE_W(date), CF_LE_W(time_val)); |
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| 404 | |
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[f36a7bfc] | 405 | if ((*MSDOS_DIR_ATTR(node_entry)) & MSDOS_ATTR_DIRECTORY) |
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| 406 | { |
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| 407 | fat_fd->fat_file_type = FAT_DIRECTORY; |
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[665f03a] | 408 | fat_fd->size_limit = MSDOS_MAX_DIR_LENGTH; |
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[a5305f6b] | 409 | |
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[c65afce4] | 410 | rc = fat_file_size(&fs_info->fat, fat_fd); |
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[f36a7bfc] | 411 | if (rc != RC_OK) |
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| 412 | { |
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[c65afce4] | 413 | fat_file_close(&fs_info->fat, fat_fd); |
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[f36a7bfc] | 414 | return rc; |
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| 415 | } |
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| 416 | } |
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| 417 | else |
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| 418 | { |
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[a5305f6b] | 419 | fat_fd->fat_file_size = CF_LE_L(*MSDOS_DIR_FILE_SIZE(node_entry)); |
---|
| 420 | fat_fd->fat_file_type = FAT_FILE; |
---|
[f36a7bfc] | 421 | fat_fd->size_limit = MSDOS_MAX_FILE_SIZE; |
---|
| 422 | } |
---|
[a5305f6b] | 423 | |
---|
[f36a7bfc] | 424 | /* these data is not actual for zero-length fat-file */ |
---|
| 425 | fat_fd->map.file_cln = 0; |
---|
| 426 | fat_fd->map.disk_cln = fat_fd->cln; |
---|
[a5305f6b] | 427 | |
---|
| 428 | if ((fat_fd->fat_file_size != 0) && |
---|
[f36a7bfc] | 429 | (fat_fd->fat_file_size <= fs_info->fat.vol.bpc)) |
---|
| 430 | { |
---|
| 431 | fat_fd->map.last_cln = fat_fd->cln; |
---|
| 432 | } |
---|
| 433 | else |
---|
| 434 | { |
---|
| 435 | fat_fd->map.last_cln = FAT_UNDEFINED_VALUE; |
---|
| 436 | } |
---|
[a5305f6b] | 437 | } |
---|
[f36a7bfc] | 438 | |
---|
| 439 | /* close fat-file corresponded to the node we searched in */ |
---|
[c65afce4] | 440 | rc = fat_file_close(&fs_info->fat, parent_loc->node_access); |
---|
[f36a7bfc] | 441 | if (rc != RC_OK) |
---|
| 442 | { |
---|
[c65afce4] | 443 | fat_file_close(&fs_info->fat, fat_fd); |
---|
[f36a7bfc] | 444 | return rc; |
---|
| 445 | } |
---|
| 446 | |
---|
| 447 | /* update node_info_ptr field */ |
---|
| 448 | parent_loc->node_access = fat_fd; |
---|
[a5305f6b] | 449 | |
---|
[f36a7bfc] | 450 | return rc; |
---|
[a5305f6b] | 451 | } |
---|
[f36a7bfc] | 452 | |
---|
| 453 | /* msdos_get_name_node -- |
---|
[07d6fd5] | 454 | * This routine is used in two ways: for a new node creation (a) or for |
---|
[f36a7bfc] | 455 | * search the node which correspondes to the name parameter (b). |
---|
[a5305f6b] | 456 | * In case (a) 'name' should be set up to NULL and 'name_dir_entry' should |
---|
| 457 | * point to initialized 32 bytes structure described a new node. |
---|
[f36a7bfc] | 458 | * In case (b) 'name' should contain a valid string. |
---|
| 459 | * |
---|
[a5305f6b] | 460 | * (a): reading fat-file which correspondes to directory we are going to |
---|
| 461 | * create node in. If free slot is found write contents of |
---|
| 462 | * 'name_dir_entry' into it. If reach end of fat-file and no free |
---|
[f36a7bfc] | 463 | * slot found, write 32 bytes to the end of fat-file. |
---|
| 464 | * |
---|
[a5305f6b] | 465 | * (b): reading fat-file which correspondes to directory and trying to |
---|
[f36a7bfc] | 466 | * find slot with the name field == 'name' parameter |
---|
| 467 | * |
---|
| 468 | * |
---|
| 469 | * PARAMETERS: |
---|
| 470 | * parent_loc - node description to create node in or to find name in |
---|
| 471 | * name - NULL or name to find |
---|
| 472 | * paux - identify a node location on the disk - |
---|
[a5305f6b] | 473 | * cluster num and offset inside the cluster |
---|
[07d6fd5] | 474 | * short_dir_entry - node to create/placeholder for found node (IN/OUT) |
---|
[f36a7bfc] | 475 | * |
---|
| 476 | * RETURNS: |
---|
[a5305f6b] | 477 | * RC_OK, filled aux_struct_ptr and name_dir_entry on success, or -1 if |
---|
[f36a7bfc] | 478 | * error occured (errno set apropriately) |
---|
| 479 | * |
---|
| 480 | */ |
---|
[e197621] | 481 | int |
---|
[f36a7bfc] | 482 | msdos_get_name_node( |
---|
[3b7c123] | 483 | const rtems_filesystem_location_info_t *parent_loc, |
---|
| 484 | bool create_node, |
---|
| 485 | const char *name, |
---|
| 486 | int name_len, |
---|
| 487 | msdos_name_type_t name_type, |
---|
| 488 | fat_dir_pos_t *dir_pos, |
---|
| 489 | char *name_dir_entry |
---|
[f36a7bfc] | 490 | ) |
---|
| 491 | { |
---|
[e197621] | 492 | int rc = RC_OK; |
---|
[f36a7bfc] | 493 | fat_file_fd_t *fat_fd = parent_loc->node_access; |
---|
[f91bbe64] | 494 | uint32_t dotdot_cln = 0; |
---|
[f36a7bfc] | 495 | |
---|
[07d6fd5] | 496 | /* find name in fat-file which corresponds to the directory */ |
---|
| 497 | rc = msdos_find_name_in_fat_file(parent_loc->mt_entry, fat_fd, |
---|
[d2e0bb3] | 498 | create_node, (const uint8_t*)name, name_len, name_type, |
---|
[07d6fd5] | 499 | dir_pos, name_dir_entry); |
---|
[f36a7bfc] | 500 | if ((rc != RC_OK) && (rc != MSDOS_NAME_NOT_FOUND_ERR)) |
---|
| 501 | return rc; |
---|
[a5305f6b] | 502 | |
---|
[07d6fd5] | 503 | if (!create_node) |
---|
[f36a7bfc] | 504 | { |
---|
[07d6fd5] | 505 | /* if we search for valid name and name not found -> return */ |
---|
| 506 | if (rc == MSDOS_NAME_NOT_FOUND_ERR) |
---|
[f36a7bfc] | 507 | return rc; |
---|
| 508 | |
---|
[a5305f6b] | 509 | /* |
---|
[07d6fd5] | 510 | * if we have deal with ".." - it is a special case :((( |
---|
| 511 | * |
---|
| 512 | * Really, we should return cluster num and offset not of ".." slot, but |
---|
| 513 | * slot which correspondes to real directory name. |
---|
[f36a7bfc] | 514 | */ |
---|
[07d6fd5] | 515 | if (rc == RC_OK) |
---|
[f36a7bfc] | 516 | { |
---|
[07d6fd5] | 517 | if (strncmp(name, "..", 2) == 0) |
---|
[f36a7bfc] | 518 | { |
---|
[07d6fd5] | 519 | dotdot_cln = MSDOS_EXTRACT_CLUSTER_NUM((name_dir_entry)); |
---|
| 520 | |
---|
| 521 | /* are we right under root dir ? */ |
---|
| 522 | if (dotdot_cln == 0) |
---|
| 523 | { |
---|
| 524 | /* |
---|
| 525 | * we can relax about first_char field - it never should be |
---|
| 526 | * used for root dir |
---|
| 527 | */ |
---|
| 528 | fat_dir_pos_init(dir_pos); |
---|
| 529 | dir_pos->sname.cln = FAT_ROOTDIR_CLUSTER_NUM; |
---|
| 530 | } |
---|
| 531 | else |
---|
| 532 | { |
---|
| 533 | rc = |
---|
| 534 | msdos_get_dotdot_dir_info_cluster_num_and_offset(parent_loc->mt_entry, |
---|
| 535 | dotdot_cln, |
---|
| 536 | dir_pos, |
---|
| 537 | name_dir_entry); |
---|
| 538 | if (rc != RC_OK) |
---|
| 539 | return rc; |
---|
| 540 | } |
---|
[f36a7bfc] | 541 | } |
---|
[a5305f6b] | 542 | } |
---|
[f36a7bfc] | 543 | } |
---|
| 544 | return rc; |
---|
| 545 | } |
---|
| 546 | |
---|
| 547 | /* |
---|
| 548 | * msdos_get_dotdot_dir_info_cluster_num_and_offset |
---|
| 549 | * |
---|
[a5305f6b] | 550 | * Unfortunately, in general, we cann't work here in fat-file ideologic |
---|
| 551 | * (open fat_file "..", get ".." and ".", open "..", find an entry ...) |
---|
[f36a7bfc] | 552 | * because if we open |
---|
| 553 | * fat-file ".." it may happend that we have two different fat-file |
---|
[a5305f6b] | 554 | * descriptors ( for real name of directory and ".." name ) for a single |
---|
[f36a7bfc] | 555 | * file ( cluster num of both pointers to the same cluster ) |
---|
| 556 | * But...we do it because we protected by semaphore |
---|
[a5305f6b] | 557 | * |
---|
[f36a7bfc] | 558 | */ |
---|
| 559 | |
---|
| 560 | /* msdos_get_dotdot_dir_info_cluster_num_and_offset -- |
---|
[a5305f6b] | 561 | * Get cluster num and offset not of ".." slot, but slot which correspondes |
---|
| 562 | * to real directory name. |
---|
[f36a7bfc] | 563 | * |
---|
| 564 | * PARAMETERS: |
---|
| 565 | * mt_entry - mount table entry |
---|
| 566 | * cln - data cluster num extracted drom ".." slot |
---|
| 567 | * paux - identify a node location on the disk - |
---|
| 568 | * number of cluster and offset inside the cluster |
---|
[a5305f6b] | 569 | * dir_entry - placeholder for found node |
---|
[f36a7bfc] | 570 | * |
---|
| 571 | * RETURNS: |
---|
| 572 | * RC_OK, filled 'paux' and 'dir_entry' on success, or -1 if error occured |
---|
| 573 | * (errno set apropriately) |
---|
| 574 | * |
---|
| 575 | */ |
---|
| 576 | int |
---|
| 577 | msdos_get_dotdot_dir_info_cluster_num_and_offset( |
---|
[a5305f6b] | 578 | rtems_filesystem_mount_table_entry_t *mt_entry, |
---|
[f91bbe64] | 579 | uint32_t cln, |
---|
[07d6fd5] | 580 | fat_dir_pos_t *dir_pos, |
---|
[f36a7bfc] | 581 | char *dir_entry |
---|
| 582 | ) |
---|
| 583 | { |
---|
| 584 | int rc = RC_OK; |
---|
| 585 | msdos_fs_info_t *fs_info = mt_entry->fs_info; |
---|
| 586 | fat_file_fd_t *fat_fd = NULL; |
---|
[adc829ed] | 587 | char dot_node[MSDOS_DIRECTORY_ENTRY_STRUCT_SIZE]; |
---|
| 588 | char dotdot_node[MSDOS_DIRECTORY_ENTRY_STRUCT_SIZE]; |
---|
[f91bbe64] | 589 | uint32_t cl4find = 0; |
---|
[d2e0bb3] | 590 | rtems_dosfs_convert_control *converter = fs_info->converter; |
---|
[a5305f6b] | 591 | |
---|
[f36a7bfc] | 592 | /* |
---|
| 593 | * open fat-file corresponded to ".." |
---|
| 594 | */ |
---|
[c65afce4] | 595 | rc = fat_file_open(&fs_info->fat, dir_pos, &fat_fd); |
---|
[f36a7bfc] | 596 | if (rc != RC_OK) |
---|
| 597 | return rc; |
---|
[a5305f6b] | 598 | |
---|
[f36a7bfc] | 599 | fat_fd->cln = cln; |
---|
| 600 | fat_fd->fat_file_type = FAT_DIRECTORY; |
---|
[665f03a] | 601 | fat_fd->size_limit = MSDOS_MAX_DIR_LENGTH; |
---|
[a5305f6b] | 602 | |
---|
[f36a7bfc] | 603 | fat_fd->map.file_cln = 0; |
---|
| 604 | fat_fd->map.disk_cln = fat_fd->cln; |
---|
| 605 | |
---|
[c65afce4] | 606 | rc = fat_file_size(&fs_info->fat, fat_fd); |
---|
[f36a7bfc] | 607 | if (rc != RC_OK) |
---|
| 608 | { |
---|
[c65afce4] | 609 | fat_file_close(&fs_info->fat, fat_fd); |
---|
[f36a7bfc] | 610 | return rc; |
---|
[a5305f6b] | 611 | } |
---|
| 612 | |
---|
[f36a7bfc] | 613 | /* find "." node in opened directory */ |
---|
[07d6fd5] | 614 | memset(dot_node, 0, MSDOS_DIRECTORY_ENTRY_STRUCT_SIZE); |
---|
[d2e0bb3] | 615 | msdos_long_to_short( |
---|
| 616 | converter, |
---|
| 617 | ".", 1, dot_node, MSDOS_SHORT_NAME_LEN); |
---|
| 618 | rc = msdos_find_name_in_fat_file(mt_entry, fat_fd, false, (const uint8_t*)".", 1, |
---|
[07d6fd5] | 619 | MSDOS_NAME_SHORT, dir_pos, dot_node); |
---|
[a5305f6b] | 620 | |
---|
[f36a7bfc] | 621 | if (rc != RC_OK) |
---|
| 622 | { |
---|
[c65afce4] | 623 | fat_file_close(&fs_info->fat, fat_fd); |
---|
[f36a7bfc] | 624 | return rc; |
---|
| 625 | } |
---|
[a5305f6b] | 626 | |
---|
[f36a7bfc] | 627 | /* find ".." node in opened directory */ |
---|
[07d6fd5] | 628 | memset(dotdot_node, 0, MSDOS_DIRECTORY_ENTRY_STRUCT_SIZE); |
---|
[d2e0bb3] | 629 | msdos_long_to_short( |
---|
| 630 | converter, |
---|
| 631 | "..", 2, dotdot_node, MSDOS_SHORT_NAME_LEN); |
---|
| 632 | rc = msdos_find_name_in_fat_file(mt_entry, fat_fd, false, (const uint8_t*)"..", 2, |
---|
[07d6fd5] | 633 | MSDOS_NAME_SHORT, dir_pos, |
---|
[f36a7bfc] | 634 | dotdot_node); |
---|
[a5305f6b] | 635 | |
---|
| 636 | if (rc != RC_OK) |
---|
[f36a7bfc] | 637 | { |
---|
[c65afce4] | 638 | fat_file_close(&fs_info->fat, fat_fd); |
---|
[f36a7bfc] | 639 | return rc; |
---|
| 640 | } |
---|
| 641 | |
---|
| 642 | cl4find = MSDOS_EXTRACT_CLUSTER_NUM(dot_node); |
---|
[a5305f6b] | 643 | |
---|
[f36a7bfc] | 644 | /* close fat-file corresponded to ".." directory */ |
---|
[c65afce4] | 645 | rc = fat_file_close(&fs_info->fat, fat_fd); |
---|
[f36a7bfc] | 646 | if ( rc != RC_OK ) |
---|
| 647 | return rc; |
---|
| 648 | |
---|
| 649 | if ( (MSDOS_EXTRACT_CLUSTER_NUM(dotdot_node)) == 0) |
---|
| 650 | { |
---|
[a5305f6b] | 651 | /* |
---|
| 652 | * we handle root dir for all FAT types in the same way with the |
---|
[f36a7bfc] | 653 | * ordinary directories ( through fat_file_* calls ) |
---|
| 654 | */ |
---|
[07d6fd5] | 655 | fat_dir_pos_init(dir_pos); |
---|
| 656 | dir_pos->sname.cln = FAT_ROOTDIR_CLUSTER_NUM; |
---|
[f36a7bfc] | 657 | } |
---|
| 658 | |
---|
| 659 | /* open fat-file corresponded to second ".." */ |
---|
[c65afce4] | 660 | rc = fat_file_open(&fs_info->fat, dir_pos, &fat_fd); |
---|
[f36a7bfc] | 661 | if (rc != RC_OK) |
---|
| 662 | return rc; |
---|
| 663 | |
---|
| 664 | if ((MSDOS_EXTRACT_CLUSTER_NUM(dotdot_node)) == 0) |
---|
| 665 | fat_fd->cln = fs_info->fat.vol.rdir_cl; |
---|
| 666 | else |
---|
| 667 | fat_fd->cln = MSDOS_EXTRACT_CLUSTER_NUM(dotdot_node); |
---|
| 668 | |
---|
| 669 | fat_fd->fat_file_type = FAT_DIRECTORY; |
---|
[665f03a] | 670 | fat_fd->size_limit = MSDOS_MAX_DIR_LENGTH; |
---|
[a5305f6b] | 671 | |
---|
[f36a7bfc] | 672 | fat_fd->map.file_cln = 0; |
---|
| 673 | fat_fd->map.disk_cln = fat_fd->cln; |
---|
| 674 | |
---|
[c65afce4] | 675 | rc = fat_file_size(&fs_info->fat, fat_fd); |
---|
[f36a7bfc] | 676 | if (rc != RC_OK) |
---|
| 677 | { |
---|
[c65afce4] | 678 | fat_file_close(&fs_info->fat, fat_fd); |
---|
[f36a7bfc] | 679 | return rc; |
---|
[a5305f6b] | 680 | } |
---|
| 681 | |
---|
[f36a7bfc] | 682 | /* in this directory find slot with specified cluster num */ |
---|
[a5305f6b] | 683 | rc = msdos_find_node_by_cluster_num_in_fat_file(mt_entry, fat_fd, cl4find, |
---|
[07d6fd5] | 684 | dir_pos, dir_entry); |
---|
[f36a7bfc] | 685 | if (rc != RC_OK) |
---|
| 686 | { |
---|
[c65afce4] | 687 | fat_file_close(&fs_info->fat, fat_fd); |
---|
[f36a7bfc] | 688 | return rc; |
---|
| 689 | } |
---|
[c65afce4] | 690 | rc = fat_file_close(&fs_info->fat, fat_fd); |
---|
[f36a7bfc] | 691 | return rc; |
---|
| 692 | } |
---|
| 693 | |
---|
| 694 | |
---|
[a7eaaae8] | 695 | /* fat_file_write_time_and_date -- |
---|
[a5305f6b] | 696 | * Write last write date and time for a file to the disk (to corresponded |
---|
| 697 | * 32bytes node) |
---|
[f36a7bfc] | 698 | * |
---|
| 699 | * PARAMETERS: |
---|
[a7eaaae8] | 700 | * fs_info - fat fs info |
---|
[f36a7bfc] | 701 | * fat_fd - fat-file descriptor |
---|
| 702 | * |
---|
| 703 | * RETURNS: |
---|
| 704 | * RC_OK on success, or -1 if error occured (errno set apropriately). |
---|
| 705 | * |
---|
| 706 | */ |
---|
| 707 | int |
---|
[a7eaaae8] | 708 | fat_file_write_time_and_date( |
---|
| 709 | fat_fs_info_t *fs_info, |
---|
[f36a7bfc] | 710 | fat_file_fd_t *fat_fd |
---|
| 711 | ) |
---|
| 712 | { |
---|
[a7eaaae8] | 713 | int rc = RC_OK; |
---|
| 714 | ssize_t ret; |
---|
[5ac15a5] | 715 | uint16_t time_val; |
---|
| 716 | uint16_t date; |
---|
[f91bbe64] | 717 | uint32_t sec = 0; |
---|
| 718 | uint32_t byte = 0; |
---|
[a5305f6b] | 719 | |
---|
| 720 | /* |
---|
[42a22f08] | 721 | * calculate input for fat_sector_write: convert (cluster num, offset) to |
---|
[f36a7bfc] | 722 | * (sector num, new offset) |
---|
| 723 | */ |
---|
[a7eaaae8] | 724 | sec = fat_cluster_num_to_sector_num(fs_info, fat_fd->dir_pos.sname.cln); |
---|
| 725 | sec += (fat_fd->dir_pos.sname.ofs >> fs_info->vol.sec_log2); |
---|
[f36a7bfc] | 726 | /* byte points to start of 32bytes structure */ |
---|
[a7eaaae8] | 727 | byte = fat_fd->dir_pos.sname.ofs & (fs_info->vol.bps - 1); |
---|
| 728 | |
---|
| 729 | msdos_date_unix2dos(fat_fd->mtime, &date, &time_val); |
---|
[a5305f6b] | 730 | |
---|
[f36a7bfc] | 731 | time_val = CT_LE_W(time_val); |
---|
[a7eaaae8] | 732 | ret = fat_sector_write(fs_info, sec, byte + MSDOS_FILE_WTIME_OFFSET, |
---|
| 733 | 2, (char *)(&time_val)); |
---|
| 734 | if ( ret < 0 ) |
---|
| 735 | rc = -1; |
---|
| 736 | |
---|
[f36a7bfc] | 737 | date = CT_LE_W(date); |
---|
[a7eaaae8] | 738 | ret = fat_sector_write(fs_info, sec, byte + MSDOS_FILE_WDATE_OFFSET, |
---|
| 739 | 2, (char *)(&date)); |
---|
| 740 | if ( ret < 0 ) |
---|
| 741 | rc = -1; |
---|
[f36a7bfc] | 742 | |
---|
[a7eaaae8] | 743 | ret = fat_sector_write(fs_info, sec, byte + MSDOS_FILE_ADATE_OFFSET, |
---|
| 744 | 2, (char *)(&date)); |
---|
| 745 | if ( ret < 0 ) |
---|
| 746 | rc = -1; |
---|
[f36a7bfc] | 747 | |
---|
[a7eaaae8] | 748 | msdos_date_unix2dos(fat_fd->ctime, &date, &time_val); |
---|
| 749 | |
---|
| 750 | time_val = CT_LE_W(time_val); |
---|
| 751 | ret = fat_sector_write(fs_info, sec, byte + MSDOS_FILE_CTIME_OFFSET, |
---|
| 752 | 2, (char *)(&time_val)); |
---|
| 753 | if ( ret < 0 ) |
---|
| 754 | rc = -1; |
---|
| 755 | |
---|
| 756 | date = CT_LE_W(date); |
---|
| 757 | ret = fat_sector_write(fs_info, sec, byte + MSDOS_FILE_CDATE_OFFSET, |
---|
| 758 | 2, (char *)(&date)); |
---|
| 759 | if ( ret < 0 ) |
---|
| 760 | rc = -1; |
---|
| 761 | |
---|
| 762 | return rc; |
---|
[f36a7bfc] | 763 | } |
---|
| 764 | |
---|
[a7eaaae8] | 765 | /* fat_set_first_cluster_num -- |
---|
[a5305f6b] | 766 | * Write number of first cluster of the file to the disk (to corresponded |
---|
| 767 | * 32bytes slot) |
---|
[f36a7bfc] | 768 | * |
---|
| 769 | * PARAMETERS: |
---|
[a7eaaae8] | 770 | * fs_info - fat fs info |
---|
[f36a7bfc] | 771 | * fat_fd - fat-file descriptor |
---|
| 772 | * |
---|
| 773 | * RETURNS: |
---|
| 774 | * RC_OK on success, or -1 if error occured |
---|
| 775 | * |
---|
| 776 | */ |
---|
| 777 | int |
---|
[a7eaaae8] | 778 | fat_file_write_first_cluster_num( |
---|
| 779 | fat_fs_info_t *fs_info, |
---|
[f36a7bfc] | 780 | fat_file_fd_t *fat_fd |
---|
| 781 | ) |
---|
| 782 | { |
---|
| 783 | ssize_t ret1 = 0, ret2 = 0; |
---|
[f91bbe64] | 784 | uint32_t new_cln = fat_fd->cln; |
---|
| 785 | uint16_t le_cl_low = 0; |
---|
[a5305f6b] | 786 | uint16_t le_cl_hi = 0; |
---|
[f91bbe64] | 787 | uint32_t sec = 0; |
---|
| 788 | uint32_t byte = 0; |
---|
[f36a7bfc] | 789 | |
---|
[a5305f6b] | 790 | /* |
---|
[42a22f08] | 791 | * calculate input for fat_sector_write: convert (cluster num, offset) to |
---|
[f36a7bfc] | 792 | * (sector num, new offset) |
---|
| 793 | */ |
---|
[a7eaaae8] | 794 | sec = fat_cluster_num_to_sector_num(fs_info, fat_fd->dir_pos.sname.cln); |
---|
| 795 | sec += (fat_fd->dir_pos.sname.ofs >> fs_info->vol.sec_log2); |
---|
[f36a7bfc] | 796 | /* byte from points to start of 32bytes structure */ |
---|
[a7eaaae8] | 797 | byte = fat_fd->dir_pos.sname.ofs & (fs_info->vol.bps - 1); |
---|
[a5305f6b] | 798 | |
---|
[f91bbe64] | 799 | le_cl_low = CT_LE_W((uint16_t )(new_cln & 0x0000FFFF)); |
---|
[a7eaaae8] | 800 | ret1 = fat_sector_write(fs_info, sec, |
---|
[f36a7bfc] | 801 | byte + MSDOS_FIRST_CLUSTER_LOW_OFFSET, 2, |
---|
| 802 | (char *)(&le_cl_low)); |
---|
[f91bbe64] | 803 | le_cl_hi = CT_LE_W((uint16_t )((new_cln & 0xFFFF0000) >> 16)); |
---|
[a7eaaae8] | 804 | ret2 = fat_sector_write(fs_info, sec, |
---|
[f36a7bfc] | 805 | byte + MSDOS_FIRST_CLUSTER_HI_OFFSET, 2, |
---|
| 806 | (char *)(&le_cl_hi)); |
---|
| 807 | if ( (ret1 < 0) || (ret2 < 0) ) |
---|
| 808 | return -1; |
---|
| 809 | |
---|
| 810 | return RC_OK; |
---|
| 811 | } |
---|
| 812 | |
---|
| 813 | |
---|
[a7eaaae8] | 814 | /* fat_set_file size -- |
---|
[a5305f6b] | 815 | * Write file size of the file to the disk (to corresponded 32bytes slot) |
---|
[f36a7bfc] | 816 | * |
---|
| 817 | * PARAMETERS: |
---|
[a7eaaae8] | 818 | * fs_info - fat fs info |
---|
[f36a7bfc] | 819 | * fat_fd - fat-file descriptor |
---|
| 820 | * |
---|
| 821 | * RETURNS: |
---|
| 822 | * RC_OK on success, or -1 if error occured (errno set apropriately). |
---|
| 823 | * |
---|
| 824 | */ |
---|
| 825 | int |
---|
[a7eaaae8] | 826 | fat_file_write_file_size( |
---|
| 827 | fat_fs_info_t *fs_info, |
---|
[f36a7bfc] | 828 | fat_file_fd_t *fat_fd |
---|
| 829 | ) |
---|
| 830 | { |
---|
| 831 | ssize_t ret = 0; |
---|
[f91bbe64] | 832 | uint32_t le_new_length = 0; |
---|
| 833 | uint32_t sec = 0; |
---|
| 834 | uint32_t byte = 0; |
---|
[f36a7bfc] | 835 | |
---|
[a7eaaae8] | 836 | sec = fat_cluster_num_to_sector_num(fs_info, fat_fd->dir_pos.sname.cln); |
---|
| 837 | sec += (fat_fd->dir_pos.sname.ofs >> fs_info->vol.sec_log2); |
---|
| 838 | byte = (fat_fd->dir_pos.sname.ofs & (fs_info->vol.bps - 1)); |
---|
[f36a7bfc] | 839 | |
---|
[267de79a] | 840 | if (fat_fd->fat_file_type == FAT_DIRECTORY) { |
---|
| 841 | le_new_length = CT_LE_L(0); |
---|
| 842 | } else { |
---|
| 843 | le_new_length = CT_LE_L(fat_fd->fat_file_size); |
---|
| 844 | } |
---|
| 845 | |
---|
[a7eaaae8] | 846 | ret = fat_sector_write(fs_info, sec, byte + MSDOS_FILE_SIZE_OFFSET, 4, |
---|
[f36a7bfc] | 847 | (char *)(&le_new_length)); |
---|
| 848 | if ( ret < 0 ) |
---|
| 849 | return -1; |
---|
| 850 | |
---|
| 851 | return RC_OK; |
---|
| 852 | } |
---|
| 853 | |
---|
| 854 | /* |
---|
| 855 | * We should not check whether this routine is called for root dir - it |
---|
| 856 | * never can happend |
---|
| 857 | */ |
---|
| 858 | |
---|
| 859 | /* msdos_set_first_char4file_name -- |
---|
[a5305f6b] | 860 | * Write first character of the name of the file to the disk (to |
---|
| 861 | * corresponded 32bytes slot) |
---|
[f36a7bfc] | 862 | * |
---|
| 863 | * PARAMETERS: |
---|
[a5305f6b] | 864 | * mt_entry - mount table entry |
---|
[f36a7bfc] | 865 | * cl - number of cluster |
---|
| 866 | * ofs - offset inside cluster |
---|
| 867 | * fchar - character to set up |
---|
| 868 | * |
---|
| 869 | * RETURNS: |
---|
| 870 | * RC_OK on success, or -1 if error occured (errno set apropriately) |
---|
| 871 | * |
---|
| 872 | */ |
---|
[a5305f6b] | 873 | int |
---|
[f36a7bfc] | 874 | msdos_set_first_char4file_name( |
---|
[a5305f6b] | 875 | rtems_filesystem_mount_table_entry_t *mt_entry, |
---|
[07d6fd5] | 876 | fat_dir_pos_t *dir_pos, |
---|
[f36a7bfc] | 877 | unsigned char fchar |
---|
| 878 | ) |
---|
| 879 | { |
---|
[07d6fd5] | 880 | ssize_t ret; |
---|
[f36a7bfc] | 881 | msdos_fs_info_t *fs_info = mt_entry->fs_info; |
---|
[07d6fd5] | 882 | uint32_t dir_block_size; |
---|
| 883 | fat_pos_t start = dir_pos->lname; |
---|
| 884 | fat_pos_t end = dir_pos->sname; |
---|
[f36a7bfc] | 885 | |
---|
[07d6fd5] | 886 | if ((end.cln == fs_info->fat.vol.rdir_cl) && |
---|
| 887 | (fs_info->fat.vol.type & (FAT_FAT12 | FAT_FAT16))) |
---|
| 888 | dir_block_size = fs_info->fat.vol.rdir_size; |
---|
| 889 | else |
---|
| 890 | dir_block_size = fs_info->fat.vol.bpc; |
---|
[0a7278e] | 891 | |
---|
[07d6fd5] | 892 | if (dir_pos->lname.cln == FAT_FILE_SHORT_NAME) |
---|
| 893 | start = dir_pos->sname; |
---|
[f36a7bfc] | 894 | |
---|
[07d6fd5] | 895 | /* |
---|
| 896 | * We handle the changes directly due the way the short file |
---|
| 897 | * name code was written rather than use the fat_file_write |
---|
| 898 | * interface. |
---|
| 899 | */ |
---|
| 900 | while (true) |
---|
| 901 | { |
---|
[c65afce4] | 902 | uint32_t sec = (fat_cluster_num_to_sector_num(&fs_info->fat, start.cln) + |
---|
[07d6fd5] | 903 | (start.ofs >> fs_info->fat.vol.sec_log2)); |
---|
[721fe34] | 904 | uint32_t byte = (start.ofs & (fs_info->fat.vol.bps - 1)); |
---|
[07d6fd5] | 905 | |
---|
[42a22f08] | 906 | ret = fat_sector_write(&fs_info->fat, sec, byte + MSDOS_FILE_NAME_OFFSET, |
---|
[c65afce4] | 907 | 1, &fchar); |
---|
[07d6fd5] | 908 | if (ret < 0) |
---|
[f36a7bfc] | 909 | return -1; |
---|
| 910 | |
---|
[07d6fd5] | 911 | if ((start.cln == end.cln) && (start.ofs == end.ofs)) |
---|
| 912 | break; |
---|
| 913 | |
---|
| 914 | start.ofs += MSDOS_DIRECTORY_ENTRY_STRUCT_SIZE; |
---|
| 915 | if (start.ofs >= dir_block_size) |
---|
| 916 | { |
---|
| 917 | int rc; |
---|
| 918 | if ((end.cln == fs_info->fat.vol.rdir_cl) && |
---|
| 919 | (fs_info->fat.vol.type & (FAT_FAT12 | FAT_FAT16))) |
---|
| 920 | break; |
---|
[c65afce4] | 921 | rc = fat_get_fat_cluster(&fs_info->fat, start.cln, &start.cln); |
---|
[07d6fd5] | 922 | if ( rc != RC_OK ) |
---|
| 923 | return rc; |
---|
| 924 | start.ofs = 0; |
---|
| 925 | } |
---|
| 926 | } |
---|
| 927 | |
---|
[f36a7bfc] | 928 | return RC_OK; |
---|
[a5305f6b] | 929 | } |
---|
[f36a7bfc] | 930 | |
---|
| 931 | /* msdos_dir_is_empty -- |
---|
[a5305f6b] | 932 | * Check whether directory which correspondes to the fat-file descriptor is |
---|
| 933 | * empty. |
---|
[f36a7bfc] | 934 | * |
---|
| 935 | * PARAMETERS: |
---|
[a5305f6b] | 936 | * mt_entry - mount table entry |
---|
| 937 | * fat_fd - fat-file descriptor |
---|
| 938 | * ret_val - placeholder for result |
---|
[f36a7bfc] | 939 | * |
---|
| 940 | * RETURNS: |
---|
| 941 | * RC_OK on success, or -1 if error occured |
---|
| 942 | * |
---|
| 943 | */ |
---|
| 944 | int |
---|
| 945 | msdos_dir_is_empty( |
---|
| 946 | rtems_filesystem_mount_table_entry_t *mt_entry, |
---|
[a5305f6b] | 947 | fat_file_fd_t *fat_fd, |
---|
[0a896eb] | 948 | bool *ret_val |
---|
[f36a7bfc] | 949 | ) |
---|
| 950 | { |
---|
| 951 | ssize_t ret = 0; |
---|
| 952 | msdos_fs_info_t *fs_info = mt_entry->fs_info; |
---|
[f91bbe64] | 953 | uint32_t j = 0, i = 0; |
---|
[a5305f6b] | 954 | |
---|
[f36a7bfc] | 955 | /* dir is not empty */ |
---|
[0a896eb] | 956 | *ret_val = false; |
---|
[f36a7bfc] | 957 | |
---|
[c65afce4] | 958 | while ((ret = fat_file_read(&fs_info->fat, fat_fd, j * fs_info->fat.vol.bps, |
---|
[a5305f6b] | 959 | fs_info->fat.vol.bps, |
---|
[f36a7bfc] | 960 | fs_info->cl_buf)) != FAT_EOF) |
---|
| 961 | { |
---|
| 962 | if (ret < MSDOS_DIRECTORY_ENTRY_STRUCT_SIZE) |
---|
| 963 | return -1; |
---|
| 964 | |
---|
| 965 | assert(ret == fs_info->fat.vol.bps); |
---|
[a5305f6b] | 966 | |
---|
[b17ff491] | 967 | /* have to look at the DIR_NAME as "raw" 8-bit data */ |
---|
[a5305f6b] | 968 | for (i = 0; |
---|
| 969 | i < fs_info->fat.vol.bps; |
---|
[f36a7bfc] | 970 | i += MSDOS_DIRECTORY_ENTRY_STRUCT_SIZE) |
---|
| 971 | { |
---|
[07d6fd5] | 972 | char* entry = (char*) fs_info->cl_buf + i; |
---|
| 973 | |
---|
| 974 | /* |
---|
| 975 | * If the entry is empty, a long file name entry, or '.' or '..' |
---|
| 976 | * then consider it as empty. |
---|
| 977 | * |
---|
| 978 | * Just ignore long file name entries. They must have a short entry to |
---|
| 979 | * be valid. |
---|
| 980 | */ |
---|
| 981 | if (((*MSDOS_DIR_ENTRY_TYPE(entry)) == |
---|
[a5305f6b] | 982 | MSDOS_THIS_DIR_ENTRY_EMPTY) || |
---|
[07d6fd5] | 983 | ((*MSDOS_DIR_ATTR(entry) & MSDOS_ATTR_LFN_MASK) == |
---|
| 984 | MSDOS_ATTR_LFN) || |
---|
| 985 | (strncmp(MSDOS_DIR_NAME((entry)), MSDOS_DOT_NAME, |
---|
[f36a7bfc] | 986 | MSDOS_SHORT_NAME_LEN) == 0) || |
---|
[07d6fd5] | 987 | (strncmp(MSDOS_DIR_NAME((entry)), |
---|
[a5305f6b] | 988 | MSDOS_DOTDOT_NAME, |
---|
[f36a7bfc] | 989 | MSDOS_SHORT_NAME_LEN) == 0)) |
---|
| 990 | continue; |
---|
| 991 | |
---|
[07d6fd5] | 992 | /* |
---|
| 993 | * Nothing more to look at. |
---|
| 994 | */ |
---|
| 995 | if ((*MSDOS_DIR_NAME(entry)) == |
---|
[f36a7bfc] | 996 | MSDOS_THIS_DIR_ENTRY_AND_REST_EMPTY) |
---|
| 997 | { |
---|
[0a896eb] | 998 | *ret_val = true; |
---|
[f36a7bfc] | 999 | return RC_OK; |
---|
| 1000 | } |
---|
[07d6fd5] | 1001 | |
---|
| 1002 | /* |
---|
| 1003 | * Short file name entries mean not empty. |
---|
| 1004 | */ |
---|
[f36a7bfc] | 1005 | return RC_OK; |
---|
[a5305f6b] | 1006 | } |
---|
| 1007 | j++; |
---|
[f36a7bfc] | 1008 | } |
---|
[0a896eb] | 1009 | *ret_val = true; |
---|
[f36a7bfc] | 1010 | return RC_OK; |
---|
| 1011 | } |
---|
| 1012 | |
---|
[d2e0bb3] | 1013 | #define MSDOS_FIND_PRINT 0 |
---|
| 1014 | static int |
---|
| 1015 | msdos_on_entry_found ( |
---|
| 1016 | msdos_fs_info_t *fs_info, |
---|
| 1017 | fat_file_fd_t *fat_fd, |
---|
| 1018 | const uint32_t bts2rd, |
---|
| 1019 | char *name_dir_entry, |
---|
| 1020 | char *entry, |
---|
| 1021 | fat_dir_pos_t *dir_pos, |
---|
[b1daf0f] | 1022 | uint32_t dir_offset, |
---|
[d2e0bb3] | 1023 | const uint32_t dir_entry, |
---|
| 1024 | const fat_pos_t *lfn_start |
---|
| 1025 | ) |
---|
| 1026 | { |
---|
| 1027 | int rc = RC_OK; |
---|
| 1028 | #if MSDOS_FIND_PRINT |
---|
| 1029 | printf ("MSFS:[9.3] SNF found\n"); |
---|
| 1030 | #endif |
---|
| 1031 | /* |
---|
| 1032 | * We get the entry we looked for - fill the position |
---|
| 1033 | * structure and the 32 bytes of the short entry |
---|
| 1034 | */ |
---|
| 1035 | rc = fat_file_ioctl(&fs_info->fat, |
---|
| 1036 | fat_fd, |
---|
| 1037 | F_CLU_NUM, |
---|
[b1daf0f] | 1038 | dir_offset * bts2rd, |
---|
[d2e0bb3] | 1039 | &dir_pos->sname.cln); |
---|
| 1040 | if (rc == RC_OK) { |
---|
| 1041 | dir_pos->sname.ofs = dir_entry; |
---|
| 1042 | |
---|
| 1043 | if (lfn_start->cln != FAT_FILE_SHORT_NAME) |
---|
| 1044 | { |
---|
| 1045 | rc = fat_file_ioctl (&fs_info->fat, |
---|
| 1046 | fat_fd, |
---|
| 1047 | F_CLU_NUM, |
---|
| 1048 | lfn_start->cln * bts2rd, |
---|
| 1049 | &lfn_start->cln); |
---|
| 1050 | } |
---|
| 1051 | if ( rc == RC_OK ) { |
---|
| 1052 | dir_pos->lname.cln = lfn_start->cln; |
---|
| 1053 | dir_pos->lname.ofs = lfn_start->ofs; |
---|
| 1054 | |
---|
| 1055 | memcpy(name_dir_entry, entry, |
---|
| 1056 | MSDOS_DIRECTORY_ENTRY_STRUCT_SIZE); |
---|
| 1057 | } |
---|
| 1058 | } |
---|
| 1059 | |
---|
| 1060 | return rc; |
---|
| 1061 | } |
---|
| 1062 | |
---|
| 1063 | ssize_t |
---|
| 1064 | msdos_get_utf16_string_from_long_entry ( |
---|
| 1065 | const char *entry, |
---|
| 1066 | uint16_t *entry_string_buf, |
---|
| 1067 | const size_t buf_size, |
---|
| 1068 | bool is_first_entry |
---|
| 1069 | ) |
---|
| 1070 | { |
---|
| 1071 | ssize_t chars_in_entry; |
---|
| 1072 | |
---|
[83a4cbb] | 1073 | if (buf_size >= MSDOS_LFN_ENTRY_SIZE) { |
---|
[d2e0bb3] | 1074 | memcpy (&entry_string_buf[0], &entry[1], 10 ); |
---|
| 1075 | memcpy (&entry_string_buf[5], &entry[14], 12 ); |
---|
| 1076 | memcpy (&entry_string_buf[11], &entry[28], 4 ); |
---|
| 1077 | |
---|
| 1078 | if (is_first_entry) { |
---|
| 1079 | for (chars_in_entry = 0; |
---|
[92422be] | 1080 | ( chars_in_entry < MSDOS_LFN_LEN_PER_ENTRY |
---|
| 1081 | && entry_string_buf[chars_in_entry] != 0x0000); |
---|
[d2e0bb3] | 1082 | ++chars_in_entry) { |
---|
| 1083 | ; |
---|
| 1084 | } |
---|
| 1085 | } |
---|
| 1086 | else |
---|
| 1087 | chars_in_entry = MSDOS_LFN_LEN_PER_ENTRY; |
---|
| 1088 | |
---|
| 1089 | return chars_in_entry * MSDOS_NAME_LFN_BYTES_PER_CHAR; |
---|
| 1090 | } |
---|
| 1091 | else |
---|
| 1092 | return ENOMEM; |
---|
| 1093 | } |
---|
| 1094 | |
---|
| 1095 | /* msdos_format_dirent_with_dot -- |
---|
| 1096 | * This routine convert a (short) MSDOS filename as present on disk |
---|
| 1097 | * (fixed 8+3 characters, filled with blanks, without separator dot) |
---|
| 1098 | * to a "normal" format, with between 0 and 8 name chars, |
---|
| 1099 | * a separating dot and up to 3 extension characters |
---|
| 1100 | * Rules to work: |
---|
| 1101 | * - copy any (0-8) "name" part characters that are non-blank |
---|
| 1102 | * - if an extension exists, append a dot |
---|
| 1103 | * - copy any (0-3) non-blank extension characters |
---|
| 1104 | * - append a '\0' (dont count it for the rturn code |
---|
[f36a7bfc] | 1105 | * |
---|
| 1106 | * PARAMETERS: |
---|
[d2e0bb3] | 1107 | * dst: pointer to destination char array (must be big enough) |
---|
| 1108 | * src: pointer to source characters |
---|
[f36a7bfc] | 1109 | * |
---|
| 1110 | * |
---|
[d2e0bb3] | 1111 | * RETURNS: |
---|
| 1112 | * the number of bytes (without trailing '\0'(written to destination |
---|
[f36a7bfc] | 1113 | */ |
---|
[d2e0bb3] | 1114 | ssize_t |
---|
| 1115 | msdos_format_dirent_with_dot(char *dst,const char *src) |
---|
[f36a7bfc] | 1116 | { |
---|
[d2e0bb3] | 1117 | ssize_t len; |
---|
| 1118 | int i; |
---|
| 1119 | const char *src_tmp; |
---|
| 1120 | |
---|
| 1121 | /* |
---|
| 1122 | * find last non-blank character of base name |
---|
| 1123 | */ |
---|
| 1124 | for (i = MSDOS_SHORT_BASE_LEN, src_tmp = src + MSDOS_SHORT_BASE_LEN - 1; |
---|
| 1125 | i > 0 && *src_tmp == ' '; |
---|
| 1126 | --i,--src_tmp) |
---|
| 1127 | {}; |
---|
| 1128 | /* |
---|
| 1129 | * copy base name to destination |
---|
| 1130 | */ |
---|
| 1131 | src_tmp = src; |
---|
| 1132 | len = i; |
---|
| 1133 | while (i-- > 0) { |
---|
| 1134 | *dst++ = tolower((unsigned char)(*src_tmp++)); |
---|
| 1135 | } |
---|
| 1136 | /* |
---|
| 1137 | * find last non-blank character of extension |
---|
| 1138 | */ |
---|
| 1139 | for (i = MSDOS_SHORT_EXT_LEN, |
---|
| 1140 | src_tmp = src + MSDOS_SHORT_BASE_LEN+MSDOS_SHORT_EXT_LEN-1; |
---|
| 1141 | i > 0 && *src_tmp == ' '; |
---|
| 1142 | --i, --src_tmp) |
---|
| 1143 | {}; |
---|
| 1144 | /* |
---|
| 1145 | * extension is not empty |
---|
| 1146 | */ |
---|
| 1147 | if (i > 0) { |
---|
| 1148 | *dst++ = '.'; /* append dot */ |
---|
| 1149 | ++len; /* dot */ |
---|
| 1150 | src_tmp = src + MSDOS_SHORT_BASE_LEN; |
---|
| 1151 | while (i-- > 0) { |
---|
| 1152 | *dst++ = tolower((unsigned char)(*src_tmp++)); |
---|
| 1153 | ++len; |
---|
| 1154 | } |
---|
| 1155 | } |
---|
| 1156 | *dst = '\0'; /* terminate string */ |
---|
[07d6fd5] | 1157 | |
---|
[d2e0bb3] | 1158 | return len; |
---|
| 1159 | } |
---|
[0a7278e] | 1160 | |
---|
[d2e0bb3] | 1161 | static ssize_t |
---|
| 1162 | msdos_long_entry_to_utf8_name ( |
---|
| 1163 | rtems_dosfs_convert_control *converter, |
---|
| 1164 | const char *entry, |
---|
| 1165 | const bool is_first_entry, |
---|
| 1166 | uint8_t *entry_utf8_buf, |
---|
| 1167 | const size_t buf_size) |
---|
| 1168 | { |
---|
| 1169 | ssize_t retval = 0; |
---|
| 1170 | int eno = 0; |
---|
| 1171 | size_t bytes_in_utf8 = buf_size; |
---|
| 1172 | size_t bytes_in_buf; |
---|
| 1173 | uint16_t entry_string[MSDOS_LFN_LEN_PER_ENTRY]; |
---|
| 1174 | |
---|
| 1175 | retval = msdos_get_utf16_string_from_long_entry ( |
---|
| 1176 | entry, |
---|
| 1177 | entry_string, |
---|
| 1178 | sizeof (entry_string), |
---|
| 1179 | is_first_entry |
---|
| 1180 | ); |
---|
| 1181 | |
---|
| 1182 | if (retval >= 0) { |
---|
| 1183 | bytes_in_buf = retval; |
---|
| 1184 | eno = (*converter->handler->utf16_to_utf8) ( |
---|
| 1185 | converter, |
---|
| 1186 | &entry_string[0], |
---|
| 1187 | bytes_in_buf, |
---|
| 1188 | &entry_utf8_buf[0], |
---|
| 1189 | &bytes_in_utf8); |
---|
| 1190 | if ( eno == 0 ) { |
---|
| 1191 | retval = bytes_in_utf8; |
---|
| 1192 | } |
---|
| 1193 | } |
---|
[0a7278e] | 1194 | |
---|
[d2e0bb3] | 1195 | if (eno != 0) { |
---|
| 1196 | retval = -1; |
---|
| 1197 | errno = eno; |
---|
| 1198 | } |
---|
[0a7278e] | 1199 | |
---|
[d2e0bb3] | 1200 | return retval; |
---|
| 1201 | } |
---|
[a5305f6b] | 1202 | |
---|
[d2e0bb3] | 1203 | static ssize_t msdos_short_entry_to_utf8_name ( |
---|
| 1204 | rtems_dosfs_convert_control *converter, |
---|
| 1205 | const char *entry, |
---|
| 1206 | uint8_t *buf, |
---|
| 1207 | const size_t buf_size) |
---|
| 1208 | { |
---|
| 1209 | char char_buf[MSDOS_NAME_MAX_WITH_DOT]; |
---|
| 1210 | int eno = 0; |
---|
| 1211 | size_t bytes_converted = buf_size; |
---|
| 1212 | ssize_t bytes_written = msdos_format_dirent_with_dot(char_buf, entry); |
---|
| 1213 | |
---|
| 1214 | if (bytes_written > 0) { |
---|
| 1215 | if (char_buf[0] == 0x05) |
---|
| 1216 | char_buf[0] = 0xE5; |
---|
| 1217 | |
---|
| 1218 | eno = (*converter->handler->codepage_to_utf8) ( |
---|
| 1219 | converter, |
---|
| 1220 | char_buf, |
---|
| 1221 | bytes_written, |
---|
| 1222 | buf, |
---|
| 1223 | &bytes_converted); |
---|
| 1224 | if (eno == 0) |
---|
| 1225 | bytes_written = bytes_converted; |
---|
| 1226 | } else { |
---|
| 1227 | eno = EINVAL; |
---|
| 1228 | } |
---|
| 1229 | |
---|
| 1230 | if (eno != 0) { |
---|
| 1231 | bytes_written = -1; |
---|
| 1232 | errno = eno; |
---|
| 1233 | } |
---|
| 1234 | |
---|
| 1235 | return bytes_written; |
---|
| 1236 | } |
---|
[07d6fd5] | 1237 | |
---|
[d2e0bb3] | 1238 | static ssize_t |
---|
| 1239 | msdos_compare_entry_against_filename ( |
---|
| 1240 | rtems_dosfs_convert_control *converter, |
---|
| 1241 | const uint8_t *entry, |
---|
| 1242 | const size_t entry_size, |
---|
| 1243 | const uint8_t *filename, |
---|
[a2c204eb] | 1244 | const size_t name_len_remaining, |
---|
[d2e0bb3] | 1245 | bool *is_matching) |
---|
| 1246 | { |
---|
[a2c204eb] | 1247 | ssize_t size_remaining = name_len_remaining; |
---|
[d2e0bb3] | 1248 | int eno = 0; |
---|
[83a4cbb] | 1249 | uint8_t entry_normalized[MSDOS_LFN_ENTRY_SIZE_UTF8]; |
---|
[d2e0bb3] | 1250 | size_t bytes_in_entry_normalized = sizeof ( entry_normalized ); |
---|
| 1251 | |
---|
| 1252 | eno = (*converter->handler->utf8_normalize_and_fold) ( |
---|
| 1253 | converter, |
---|
| 1254 | &entry[0], |
---|
| 1255 | entry_size, |
---|
| 1256 | &entry_normalized[0], |
---|
| 1257 | &bytes_in_entry_normalized); |
---|
| 1258 | if (eno == 0) { |
---|
| 1259 | #if MSDOS_FIND_PRINT > 1 |
---|
| 1260 | printf ( "MSFS:[6] entry_normalized:%s" |
---|
| 1261 | "name:%s\n", |
---|
| 1262 | entry, |
---|
| 1263 | filename ); |
---|
[07d6fd5] | 1264 | #endif |
---|
[d2e0bb3] | 1265 | if (bytes_in_entry_normalized <= size_remaining) { |
---|
| 1266 | size_remaining = size_remaining - bytes_in_entry_normalized; |
---|
| 1267 | if (0 == memcmp ( &entry_normalized[0], |
---|
| 1268 | &filename[size_remaining], |
---|
| 1269 | bytes_in_entry_normalized)) { |
---|
| 1270 | *is_matching = true; |
---|
| 1271 | } else { |
---|
| 1272 | *is_matching = false; |
---|
[a2c204eb] | 1273 | size_remaining = name_len_remaining; |
---|
[d2e0bb3] | 1274 | } |
---|
| 1275 | |
---|
| 1276 | } |
---|
| 1277 | else { |
---|
| 1278 | *is_matching = false; |
---|
| 1279 | } |
---|
| 1280 | } |
---|
| 1281 | |
---|
| 1282 | if (eno != 0) { |
---|
| 1283 | size_remaining = -1; |
---|
| 1284 | errno = eno; |
---|
| 1285 | } |
---|
| 1286 | |
---|
| 1287 | return size_remaining; |
---|
| 1288 | } |
---|
| 1289 | |
---|
[a2c204eb] | 1290 | static void |
---|
| 1291 | msdos_prepare_for_next_entry( |
---|
| 1292 | fat_pos_t *lfn_start, |
---|
| 1293 | bool *entry_matched, |
---|
| 1294 | ssize_t *name_len_remaining, |
---|
| 1295 | size_t name_len_for_compare) |
---|
| 1296 | { |
---|
| 1297 | lfn_start->cln = FAT_FILE_SHORT_NAME; |
---|
| 1298 | *entry_matched = false; |
---|
| 1299 | *name_len_remaining = name_len_for_compare; |
---|
| 1300 | } |
---|
| 1301 | |
---|
[d2e0bb3] | 1302 | static int |
---|
| 1303 | msdos_find_file_in_directory ( |
---|
| 1304 | const uint8_t *filename_converted, |
---|
| 1305 | const size_t name_len_for_compare, |
---|
| 1306 | const size_t name_len_for_save, |
---|
| 1307 | const msdos_name_type_t name_type, |
---|
| 1308 | msdos_fs_info_t *fs_info, |
---|
| 1309 | fat_file_fd_t *fat_fd, |
---|
| 1310 | const uint32_t bts2rd, |
---|
| 1311 | const bool create_node, |
---|
[6c988987] | 1312 | const unsigned int lfn_entries, |
---|
[d2e0bb3] | 1313 | char *name_dir_entry, |
---|
| 1314 | fat_dir_pos_t *dir_pos, |
---|
[b1daf0f] | 1315 | uint32_t *empty_file_offset, |
---|
| 1316 | uint32_t *empty_entry_count) |
---|
[d2e0bb3] | 1317 | { |
---|
| 1318 | int rc = RC_OK; |
---|
| 1319 | ssize_t bytes_read; |
---|
| 1320 | uint32_t dir_entry; |
---|
| 1321 | fat_pos_t lfn_start; |
---|
| 1322 | uint8_t lfn_checksum = 0; |
---|
[a2c204eb] | 1323 | bool entry_matched; |
---|
[d2e0bb3] | 1324 | bool empty_space_found = false; |
---|
| 1325 | uint32_t entries_per_block = bts2rd / MSDOS_DIRECTORY_ENTRY_STRUCT_SIZE; |
---|
| 1326 | int lfn_entry = 0; |
---|
[83a4cbb] | 1327 | uint8_t entry_utf8_normalized[MSDOS_LFN_ENTRY_SIZE_UTF8]; |
---|
[d2e0bb3] | 1328 | size_t bytes_in_entry; |
---|
| 1329 | bool filename_matched = false; |
---|
[a2c204eb] | 1330 | ssize_t name_len_remaining; |
---|
[d2e0bb3] | 1331 | rtems_dosfs_convert_control *converter = fs_info->converter; |
---|
[b1daf0f] | 1332 | uint32_t dir_offset = 0; |
---|
[d2e0bb3] | 1333 | |
---|
[07d6fd5] | 1334 | /* |
---|
| 1335 | * Scan the directory seeing if the file is present. While |
---|
| 1336 | * doing this see if a suitable location can be found to |
---|
| 1337 | * create the entry if the name is not found. |
---|
| 1338 | */ |
---|
[d2e0bb3] | 1339 | |
---|
[a2c204eb] | 1340 | msdos_prepare_for_next_entry(&lfn_start, &entry_matched, |
---|
| 1341 | &name_len_remaining, |
---|
| 1342 | name_len_for_compare); |
---|
[d2e0bb3] | 1343 | |
---|
[b1daf0f] | 1344 | while ( (bytes_read = fat_file_read (&fs_info->fat, fat_fd, (dir_offset * bts2rd), |
---|
[d2e0bb3] | 1345 | bts2rd, fs_info->cl_buf)) != FAT_EOF |
---|
| 1346 | && rc == RC_OK) |
---|
[f36a7bfc] | 1347 | { |
---|
[07d6fd5] | 1348 | bool remainder_empty = false; |
---|
| 1349 | #if MSDOS_FIND_PRINT |
---|
[b1daf0f] | 1350 | printf ("MSFS:[2] dir_offset:%li\n", dir_offset); |
---|
[07d6fd5] | 1351 | #endif |
---|
[0a7278e] | 1352 | |
---|
[d2e0bb3] | 1353 | if (bytes_read < MSDOS_DIRECTORY_ENTRY_STRUCT_SIZE) |
---|
[3899a537] | 1354 | rtems_set_errno_and_return_minus_one(EIO); |
---|
[a5305f6b] | 1355 | |
---|
[d2e0bb3] | 1356 | assert(bytes_read == bts2rd); |
---|
[f36a7bfc] | 1357 | |
---|
[b17ff491] | 1358 | /* have to look at the DIR_NAME as "raw" 8-bit data */ |
---|
[07d6fd5] | 1359 | for (dir_entry = 0; |
---|
[d2e0bb3] | 1360 | dir_entry < bts2rd && rc == RC_OK && (! filename_matched); |
---|
[07d6fd5] | 1361 | dir_entry += MSDOS_DIRECTORY_ENTRY_STRUCT_SIZE) |
---|
[f36a7bfc] | 1362 | { |
---|
[07d6fd5] | 1363 | char* entry = (char*) fs_info->cl_buf + dir_entry; |
---|
| 1364 | |
---|
| 1365 | /* |
---|
| 1366 | * See if the entry is empty or the remainder of the directory is |
---|
[d2e0bb3] | 1367 | * empty ? Localize to make the code read better. |
---|
[07d6fd5] | 1368 | */ |
---|
| 1369 | bool entry_empty = (*MSDOS_DIR_ENTRY_TYPE(entry) == |
---|
| 1370 | MSDOS_THIS_DIR_ENTRY_EMPTY); |
---|
| 1371 | remainder_empty = (*MSDOS_DIR_ENTRY_TYPE(entry) == |
---|
| 1372 | MSDOS_THIS_DIR_ENTRY_AND_REST_EMPTY); |
---|
| 1373 | #if MSDOS_FIND_PRINT |
---|
| 1374 | printf ("MSFS:[3] re:%i ee:%i do:%li de:%li(%ld)\n", |
---|
[b1daf0f] | 1375 | remainder_empty, entry_empty, dir_offset, |
---|
[07d6fd5] | 1376 | dir_entry, (dir_entry / MSDOS_DIRECTORY_ENTRY_STRUCT_SIZE)); |
---|
| 1377 | #endif |
---|
| 1378 | /* |
---|
| 1379 | * Remember where the we are, ie the start, so we can come back |
---|
| 1380 | * to here and write the long file name if this is the start of |
---|
[b1daf0f] | 1381 | * a series of empty entries. If empty_entry_count is 0 then |
---|
[07d6fd5] | 1382 | * we are currently not inside an empty series of entries. It |
---|
| 1383 | * is a count of empty entries. |
---|
| 1384 | */ |
---|
[b1daf0f] | 1385 | if (*empty_entry_count == 0) |
---|
[f36a7bfc] | 1386 | { |
---|
[b1daf0f] | 1387 | *empty_file_offset = dir_offset * bts2rd + dir_entry; |
---|
[07d6fd5] | 1388 | } |
---|
[f36a7bfc] | 1389 | |
---|
[07d6fd5] | 1390 | if (remainder_empty) |
---|
| 1391 | { |
---|
| 1392 | #if MSDOS_FIND_PRINT |
---|
| 1393 | printf ("MSFS:[3.1] cn:%i esf:%i\n", create_node, empty_space_found); |
---|
| 1394 | #endif |
---|
[a5305f6b] | 1395 | /* |
---|
[07d6fd5] | 1396 | * If just looking and there is no more entries in the |
---|
[f36a7bfc] | 1397 | * directory - return name-not-found |
---|
| 1398 | */ |
---|
[07d6fd5] | 1399 | if (!create_node) |
---|
[d2e0bb3] | 1400 | rc = MSDOS_NAME_NOT_FOUND_ERR; |
---|
[07d6fd5] | 1401 | |
---|
| 1402 | /* |
---|
| 1403 | * Lets go and write the directory entries. If we have not found |
---|
| 1404 | * any available space add the remaining number of entries to any that |
---|
| 1405 | * we may have already found that are just before this entry. If more |
---|
| 1406 | * are needed FAT_EOF is returned by the read and we extend the file. |
---|
| 1407 | */ |
---|
[d2e0bb3] | 1408 | if ( !empty_space_found |
---|
| 1409 | && rc == RC_OK ) |
---|
[07d6fd5] | 1410 | { |
---|
[b1daf0f] | 1411 | *empty_entry_count += |
---|
[07d6fd5] | 1412 | entries_per_block - (dir_entry / MSDOS_DIRECTORY_ENTRY_STRUCT_SIZE); |
---|
[d2e0bb3] | 1413 | empty_space_found = true; |
---|
[07d6fd5] | 1414 | #if MSDOS_FIND_PRINT |
---|
[b1daf0f] | 1415 | printf ( "MSFS:[3.2] esf:%i esc%"PRIu32"\n", empty_space_found, *empty_entry_count ); |
---|
[07d6fd5] | 1416 | #endif |
---|
| 1417 | } |
---|
| 1418 | break; |
---|
| 1419 | } |
---|
| 1420 | else if (entry_empty) |
---|
| 1421 | { |
---|
| 1422 | if (create_node) |
---|
| 1423 | { |
---|
[d2e0bb3] | 1424 | /* |
---|
| 1425 | * Remainder is not empty so is this entry empty ? |
---|
| 1426 | */ |
---|
[b1daf0f] | 1427 | (*empty_entry_count)++; |
---|
[0a7278e] | 1428 | |
---|
[6c988987] | 1429 | if (*empty_entry_count == (lfn_entries + 1)) |
---|
[d2e0bb3] | 1430 | empty_space_found = true; |
---|
[07d6fd5] | 1431 | } |
---|
| 1432 | #if MSDOS_FIND_PRINT |
---|
| 1433 | printf ("MSFS:[4.1] esc:%li esf:%i\n", |
---|
[b1daf0f] | 1434 | *empty_entry_count, empty_space_found); |
---|
[07d6fd5] | 1435 | #endif |
---|
[a2c204eb] | 1436 | msdos_prepare_for_next_entry(&lfn_start, &entry_matched, |
---|
| 1437 | &name_len_remaining, |
---|
| 1438 | name_len_for_compare); |
---|
[a5305f6b] | 1439 | } |
---|
[f36a7bfc] | 1440 | else |
---|
| 1441 | { |
---|
[07d6fd5] | 1442 | /* |
---|
| 1443 | * A valid entry so handle it. |
---|
| 1444 | * |
---|
| 1445 | * If empty space has not been found we need to start the |
---|
| 1446 | * count again. |
---|
| 1447 | */ |
---|
| 1448 | if (create_node && !empty_space_found) |
---|
| 1449 | { |
---|
[b1daf0f] | 1450 | *empty_file_offset = 0; |
---|
| 1451 | *empty_entry_count = 0; |
---|
[07d6fd5] | 1452 | } |
---|
| 1453 | |
---|
| 1454 | /* |
---|
| 1455 | * Check the attribute to see if the entry is for a long |
---|
| 1456 | * file name. |
---|
| 1457 | */ |
---|
| 1458 | if ((*MSDOS_DIR_ATTR(entry) & MSDOS_ATTR_LFN_MASK) == |
---|
| 1459 | MSDOS_ATTR_LFN) |
---|
[f36a7bfc] | 1460 | { |
---|
[d50ab079] | 1461 | bool is_first_lfn_entry = |
---|
| 1462 | (lfn_start.cln == FAT_FILE_SHORT_NAME); |
---|
| 1463 | |
---|
[d2e0bb3] | 1464 | /* int o;*/ |
---|
[07d6fd5] | 1465 | #if MSDOS_FIND_PRINT |
---|
| 1466 | printf ("MSFS:[4.2] lfn:%c entry:%i checksum:%i\n", |
---|
[8f77f8f] | 1467 | lfn_start.cln == FAT_FILE_SHORT_NAME ? 'f' : 't', |
---|
[07d6fd5] | 1468 | *MSDOS_DIR_ENTRY_TYPE(entry) & MSDOS_LAST_LONG_ENTRY_MASK, |
---|
| 1469 | *MSDOS_DIR_LFN_CHECKSUM(entry)); |
---|
| 1470 | #endif |
---|
| 1471 | /* |
---|
| 1472 | * If we are not already processing a LFN see if this is |
---|
| 1473 | * the first entry of a LFN ? |
---|
| 1474 | */ |
---|
[d50ab079] | 1475 | if (is_first_lfn_entry) |
---|
[f36a7bfc] | 1476 | { |
---|
[d2e0bb3] | 1477 | entry_matched = false; |
---|
[07d6fd5] | 1478 | |
---|
| 1479 | /* |
---|
| 1480 | * The first entry must have the last long entry |
---|
| 1481 | * flag set. |
---|
| 1482 | */ |
---|
| 1483 | if ((*MSDOS_DIR_ENTRY_TYPE(entry) & |
---|
| 1484 | MSDOS_LAST_LONG_ENTRY) == 0) |
---|
| 1485 | continue; |
---|
| 1486 | |
---|
[b1daf0f] | 1487 | lfn_start.cln = dir_offset; |
---|
[07d6fd5] | 1488 | lfn_start.ofs = dir_entry; |
---|
[d50ab079] | 1489 | lfn_entry = (*MSDOS_DIR_ENTRY_TYPE(entry) |
---|
| 1490 | & MSDOS_LAST_LONG_ENTRY_MASK); |
---|
[07d6fd5] | 1491 | lfn_checksum = *MSDOS_DIR_LFN_CHECKSUM(entry); |
---|
[0a7278e] | 1492 | |
---|
[07d6fd5] | 1493 | #if MSDOS_FIND_PRINT |
---|
| 1494 | printf ("MSFS:[4.3] lfn_checksum:%i\n", |
---|
[d2e0bb3] | 1495 | lfn_checksum); |
---|
[07d6fd5] | 1496 | #endif |
---|
| 1497 | } |
---|
| 1498 | |
---|
| 1499 | /* |
---|
| 1500 | * If the entry number or the check sum do not match |
---|
| 1501 | * forget this series of long directory entries. These |
---|
| 1502 | * could be orphaned entries depending on the history |
---|
| 1503 | * of the disk. |
---|
| 1504 | */ |
---|
| 1505 | if ((lfn_entry != (*MSDOS_DIR_ENTRY_TYPE(entry) & |
---|
| 1506 | MSDOS_LAST_LONG_ENTRY_MASK)) || |
---|
| 1507 | (lfn_checksum != *MSDOS_DIR_LFN_CHECKSUM(entry))) |
---|
| 1508 | { |
---|
| 1509 | #if MSDOS_FIND_PRINT |
---|
| 1510 | printf ("MSFS:[4.4] no match\n"); |
---|
| 1511 | #endif |
---|
[a2c204eb] | 1512 | msdos_prepare_for_next_entry(&lfn_start, |
---|
| 1513 | &entry_matched, |
---|
| 1514 | &name_len_remaining, |
---|
| 1515 | name_len_for_compare); |
---|
[07d6fd5] | 1516 | continue; |
---|
| 1517 | } |
---|
| 1518 | #if MSDOS_FIND_PRINT |
---|
| 1519 | printf ("MSFS:[5] lfne:%i\n", lfn_entry); |
---|
| 1520 | #endif |
---|
[d2e0bb3] | 1521 | lfn_entry--; |
---|
[0a7278e] | 1522 | |
---|
[d2e0bb3] | 1523 | bytes_in_entry = msdos_long_entry_to_utf8_name ( |
---|
| 1524 | converter, |
---|
| 1525 | entry, |
---|
[d50ab079] | 1526 | is_first_lfn_entry, |
---|
[d2e0bb3] | 1527 | &entry_utf8_normalized[0], |
---|
| 1528 | sizeof (entry_utf8_normalized)); |
---|
| 1529 | if (bytes_in_entry > 0) { |
---|
[a2c204eb] | 1530 | name_len_remaining = msdos_compare_entry_against_filename ( |
---|
[d2e0bb3] | 1531 | converter, |
---|
| 1532 | &entry_utf8_normalized[0], |
---|
| 1533 | bytes_in_entry, |
---|
| 1534 | &filename_converted[0], |
---|
[a2c204eb] | 1535 | name_len_remaining, |
---|
[d2e0bb3] | 1536 | &entry_matched); |
---|
| 1537 | |
---|
[a2c204eb] | 1538 | if (name_len_remaining < 0 || !entry_matched) { |
---|
| 1539 | msdos_prepare_for_next_entry(&lfn_start, |
---|
| 1540 | &entry_matched, |
---|
| 1541 | &name_len_remaining, |
---|
| 1542 | name_len_for_compare); |
---|
[07d6fd5] | 1543 | } |
---|
[d2e0bb3] | 1544 | } else { |
---|
[a2c204eb] | 1545 | msdos_prepare_for_next_entry(&lfn_start, |
---|
| 1546 | &entry_matched, |
---|
| 1547 | &name_len_remaining, |
---|
| 1548 | name_len_for_compare); |
---|
[07d6fd5] | 1549 | } |
---|
| 1550 | } |
---|
| 1551 | else |
---|
| 1552 | { |
---|
[8f77f8f] | 1553 | #if MSDOS_FIND_PRINT |
---|
[d2e0bb3] | 1554 | printf ("MSFS:[9.1] SFN entry, entry_matched:%i\n", entry_matched); |
---|
[8f77f8f] | 1555 | #endif |
---|
[07d6fd5] | 1556 | /* |
---|
| 1557 | * SFN entry found. |
---|
| 1558 | * |
---|
| 1559 | * If a LFN has been found and it matched check the |
---|
| 1560 | * entries have all been found and the checksum is |
---|
| 1561 | * correct. If this is the case return the short file |
---|
| 1562 | * name entry. |
---|
| 1563 | */ |
---|
[d2e0bb3] | 1564 | if (entry_matched) |
---|
[07d6fd5] | 1565 | { |
---|
[3efe749] | 1566 | if (lfn_entry || |
---|
| 1567 | lfn_checksum != msdos_lfn_checksum(entry)) |
---|
[d2e0bb3] | 1568 | entry_matched = false; |
---|
[a2c204eb] | 1569 | else if (name_len_remaining == 0) { |
---|
[d2e0bb3] | 1570 | filename_matched = true; |
---|
| 1571 | rc = msdos_on_entry_found ( |
---|
| 1572 | fs_info, |
---|
| 1573 | fat_fd, |
---|
| 1574 | bts2rd, |
---|
| 1575 | name_dir_entry, |
---|
| 1576 | entry, |
---|
| 1577 | dir_pos, |
---|
| 1578 | dir_offset, |
---|
| 1579 | dir_entry, |
---|
| 1580 | &lfn_start |
---|
| 1581 | ); |
---|
| 1582 | } |
---|
[07d6fd5] | 1583 | |
---|
[8f77f8f] | 1584 | #if MSDOS_FIND_PRINT |
---|
[d2e0bb3] | 1585 | printf ("MSFS:[9.2] checksum, entry_matched:%i, lfn_entry:%i, lfn_checksum:%02x/%02x\n", |
---|
[3efe749] | 1586 | entry_matched, lfn_entry, lfn_checksum, msdos_lfn_checksum(entry)); |
---|
[8f77f8f] | 1587 | #endif |
---|
[d2e0bb3] | 1588 | } else { |
---|
| 1589 | bytes_in_entry = MSDOS_SHORT_NAME_LEN + 1; |
---|
| 1590 | bytes_in_entry = msdos_short_entry_to_utf8_name ( |
---|
| 1591 | converter, |
---|
| 1592 | MSDOS_DIR_NAME (entry), |
---|
| 1593 | &entry_utf8_normalized[0], |
---|
| 1594 | bytes_in_entry); |
---|
| 1595 | if (bytes_in_entry > 0) { |
---|
[a2c204eb] | 1596 | name_len_remaining = msdos_compare_entry_against_filename ( |
---|
[d2e0bb3] | 1597 | converter, |
---|
| 1598 | &entry_utf8_normalized[0], |
---|
| 1599 | bytes_in_entry, |
---|
| 1600 | &filename_converted[0], |
---|
| 1601 | name_len_for_compare, |
---|
| 1602 | &entry_matched); |
---|
[a2c204eb] | 1603 | if (entry_matched && name_len_remaining == 0) { |
---|
[d2e0bb3] | 1604 | filename_matched = true; |
---|
| 1605 | rc = msdos_on_entry_found ( |
---|
| 1606 | fs_info, |
---|
| 1607 | fat_fd, |
---|
| 1608 | bts2rd, |
---|
| 1609 | name_dir_entry, |
---|
| 1610 | entry, |
---|
| 1611 | dir_pos, |
---|
| 1612 | dir_offset, |
---|
| 1613 | dir_entry, |
---|
| 1614 | &lfn_start |
---|
| 1615 | ); |
---|
| 1616 | } |
---|
[a2c204eb] | 1617 | if (rc == RC_OK && !filename_matched) { |
---|
| 1618 | msdos_prepare_for_next_entry(&lfn_start, |
---|
| 1619 | &entry_matched, |
---|
| 1620 | &name_len_remaining, |
---|
| 1621 | name_len_for_compare); |
---|
[d2e0bb3] | 1622 | } |
---|
| 1623 | } else { |
---|
[a2c204eb] | 1624 | msdos_prepare_for_next_entry(&lfn_start, |
---|
| 1625 | &entry_matched, |
---|
| 1626 | &name_len_remaining, |
---|
| 1627 | name_len_for_compare); |
---|
[07d6fd5] | 1628 | } |
---|
[f36a7bfc] | 1629 | } |
---|
[a5305f6b] | 1630 | } |
---|
| 1631 | } |
---|
| 1632 | } |
---|
[07d6fd5] | 1633 | |
---|
[d2e0bb3] | 1634 | if (filename_matched || remainder_empty) |
---|
[07d6fd5] | 1635 | break; |
---|
| 1636 | |
---|
[b1daf0f] | 1637 | dir_offset++; |
---|
[a5305f6b] | 1638 | } |
---|
[d2e0bb3] | 1639 | if ( ! filename_matched ) { |
---|
| 1640 | /* |
---|
| 1641 | * If we are not to create the entry return a not found error. |
---|
| 1642 | */ |
---|
| 1643 | if (!create_node) |
---|
| 1644 | rc = MSDOS_NAME_NOT_FOUND_ERR; |
---|
[07d6fd5] | 1645 | |
---|
| 1646 | #if MSDOS_FIND_PRINT |
---|
[b1daf0f] | 1647 | printf ( "MSFS:[8.1] WRITE do:%"PRIu32" esc:%"PRIu32" efo:%"PRIu32"\n", |
---|
| 1648 | dir_offset, *empty_entry_count, *empty_file_offset ); |
---|
[07d6fd5] | 1649 | #endif |
---|
[d2e0bb3] | 1650 | } |
---|
| 1651 | |
---|
| 1652 | return rc; |
---|
| 1653 | } |
---|
| 1654 | |
---|
[b1daf0f] | 1655 | static int |
---|
| 1656 | msdos_get_pos( |
---|
| 1657 | msdos_fs_info_t *fs_info, |
---|
| 1658 | fat_file_fd_t *fat_fd, |
---|
| 1659 | uint32_t bts2rd, |
---|
| 1660 | uint32_t file_offset, |
---|
| 1661 | fat_pos_t *pos |
---|
| 1662 | ) |
---|
| 1663 | { |
---|
| 1664 | pos->ofs = file_offset & (bts2rd - 1); |
---|
| 1665 | return fat_file_ioctl(&fs_info->fat, fat_fd, F_CLU_NUM, |
---|
| 1666 | file_offset, &pos->cln); |
---|
| 1667 | } |
---|
| 1668 | |
---|
[d2e0bb3] | 1669 | static int |
---|
| 1670 | msdos_add_file ( |
---|
| 1671 | const char *name_converted, |
---|
| 1672 | const msdos_name_type_t name_type, |
---|
| 1673 | msdos_fs_info_t *fs_info, |
---|
| 1674 | fat_file_fd_t *fat_fd, |
---|
| 1675 | const uint32_t bts2rd, |
---|
[6c988987] | 1676 | const unsigned int lfn_entries, |
---|
[d2e0bb3] | 1677 | const char *name_dir_entry, |
---|
| 1678 | fat_dir_pos_t *dir_pos, |
---|
[b1daf0f] | 1679 | uint32_t empty_file_offset, |
---|
| 1680 | const uint32_t empty_entry_count |
---|
[d2e0bb3] | 1681 | ) |
---|
| 1682 | { |
---|
[b1daf0f] | 1683 | int ret; |
---|
| 1684 | ssize_t bytes_written; |
---|
| 1685 | uint8_t lfn_checksum; |
---|
| 1686 | int lfn_entry; |
---|
| 1687 | uint8_t *entry; |
---|
| 1688 | uint32_t short_file_offset; |
---|
| 1689 | uint32_t length; |
---|
[07d6fd5] | 1690 | |
---|
| 1691 | /* |
---|
[b1daf0f] | 1692 | * If there is not enough space available then extend the file. |
---|
[07d6fd5] | 1693 | */ |
---|
[6c988987] | 1694 | if (empty_entry_count < lfn_entries + 1) |
---|
[07d6fd5] | 1695 | { |
---|
[b1daf0f] | 1696 | uint32_t unused; |
---|
| 1697 | |
---|
| 1698 | empty_file_offset = fat_fd->fat_file_size - |
---|
| 1699 | empty_entry_count * MSDOS_DIRECTORY_ENTRY_STRUCT_SIZE; |
---|
| 1700 | |
---|
| 1701 | ret = fat_file_extend(&fs_info->fat, |
---|
| 1702 | fat_fd, |
---|
| 1703 | true, |
---|
| 1704 | fat_fd->fat_file_size + fs_info->fat.vol.bpc, |
---|
| 1705 | &unused); |
---|
| 1706 | if (ret != RC_OK) |
---|
| 1707 | return ret; |
---|
[8f77f8f] | 1708 | } |
---|
[07d6fd5] | 1709 | |
---|
[b1daf0f] | 1710 | if (name_type == MSDOS_NAME_LONG) |
---|
[8f77f8f] | 1711 | { |
---|
[b1daf0f] | 1712 | uint32_t slot; |
---|
| 1713 | |
---|
| 1714 | /* |
---|
| 1715 | * If a long file name calculate the checksum of the short file name |
---|
| 1716 | * data to place in each long file name entry. First set the short |
---|
| 1717 | * file name to the slot of the SFN entry. This will mean no clashes |
---|
| 1718 | * in this directory. |
---|
| 1719 | */ |
---|
| 1720 | slot = (empty_file_offset / |
---|
[6c988987] | 1721 | MSDOS_DIRECTORY_ENTRY_STRUCT_SIZE) + lfn_entries + 1; |
---|
[b1daf0f] | 1722 | msdos_short_name_hex(MSDOS_DIR_NAME(name_dir_entry), slot); |
---|
| 1723 | |
---|
[3efe749] | 1724 | lfn_checksum = msdos_lfn_checksum(name_dir_entry); |
---|
[07d6fd5] | 1725 | |
---|
[6c988987] | 1726 | short_file_offset = empty_file_offset + lfn_entries |
---|
[b1daf0f] | 1727 | * MSDOS_DIRECTORY_ENTRY_STRUCT_SIZE; |
---|
| 1728 | |
---|
| 1729 | /* Get position of first long file name entry */ |
---|
| 1730 | ret = msdos_get_pos(fs_info, fat_fd, bts2rd, empty_file_offset, |
---|
| 1731 | &dir_pos->lname); |
---|
| 1732 | if (ret != RC_OK) |
---|
| 1733 | return ret; |
---|
| 1734 | } else { |
---|
| 1735 | lfn_checksum = 0; |
---|
| 1736 | short_file_offset = empty_file_offset; |
---|
| 1737 | dir_pos->lname.cln = FAT_FILE_SHORT_NAME; |
---|
| 1738 | dir_pos->lname.ofs = FAT_FILE_SHORT_NAME; |
---|
[07d6fd5] | 1739 | } |
---|
| 1740 | |
---|
[b1daf0f] | 1741 | /* Get position of short file name entry */ |
---|
| 1742 | ret = msdos_get_pos(fs_info, fat_fd, bts2rd, short_file_offset, |
---|
| 1743 | &dir_pos->sname); |
---|
[07d6fd5] | 1744 | |
---|
| 1745 | /* |
---|
| 1746 | * Handle the entry writes. |
---|
| 1747 | */ |
---|
[b1daf0f] | 1748 | entry = fs_info->cl_buf; |
---|
[07d6fd5] | 1749 | |
---|
| 1750 | #if MSDOS_FIND_PRINT |
---|
[b1daf0f] | 1751 | printf ("MSFS:[9] read_cluster:%d efo:%ld ese:%ld\n", |
---|
| 1752 | read_cluster, empty_file_offset, empty_space_entry); |
---|
[07d6fd5] | 1753 | #endif |
---|
| 1754 | |
---|
[b1daf0f] | 1755 | /* Long file name entries */ |
---|
[6c988987] | 1756 | for (lfn_entry = 0; lfn_entry < lfn_entries; ++lfn_entry) { |
---|
[b1daf0f] | 1757 | uint8_t *p; |
---|
| 1758 | const uint8_t *n; |
---|
| 1759 | int i; |
---|
| 1760 | uint8_t fill = 0; |
---|
[0a7278e] | 1761 | |
---|
[b1daf0f] | 1762 | /* |
---|
| 1763 | * Clear the entry before loading the data. |
---|
| 1764 | */ |
---|
| 1765 | memset (entry, 0, MSDOS_DIRECTORY_ENTRY_STRUCT_SIZE); |
---|
[07d6fd5] | 1766 | |
---|
[b1daf0f] | 1767 | *MSDOS_DIR_LFN_CHECKSUM(entry) = lfn_checksum; |
---|
[07d6fd5] | 1768 | |
---|
[b1daf0f] | 1769 | p = entry + 1; |
---|
| 1770 | n = (const uint8_t *) name_converted + |
---|
[6c988987] | 1771 | (lfn_entries - lfn_entry - 1) * MSDOS_LFN_ENTRY_SIZE; |
---|
[07d6fd5] | 1772 | |
---|
| 1773 | #if MSDOS_FIND_PRINT |
---|
[b1daf0f] | 1774 | printf ("MSFS:[11] "); |
---|
[07d6fd5] | 1775 | #endif |
---|
[b1daf0f] | 1776 | for (i = 0; i < MSDOS_LFN_LEN_PER_ENTRY; ++i) |
---|
[07d6fd5] | 1777 | { |
---|
[5f8ed0d] | 1778 | if (*n != 0 || *(n + 1) != 0) |
---|
[07d6fd5] | 1779 | { |
---|
[b1daf0f] | 1780 | *p = *n; |
---|
[5f8ed0d] | 1781 | *(p + 1) = *(n + 1); |
---|
| 1782 | n += MSDOS_NAME_LFN_BYTES_PER_CHAR; |
---|
[07d6fd5] | 1783 | } |
---|
[b1daf0f] | 1784 | else |
---|
[07d6fd5] | 1785 | { |
---|
[b1daf0f] | 1786 | p [0] = fill; |
---|
| 1787 | p [1] = fill; |
---|
| 1788 | fill = 0xff; |
---|
[07d6fd5] | 1789 | } |
---|
[d2e0bb3] | 1790 | #if MSDOS_FIND_PRINT |
---|
[b1daf0f] | 1791 | printf ( "'%c''%c'", *p, *(p+1) ); |
---|
[d2e0bb3] | 1792 | #endif |
---|
[0a7278e] | 1793 | |
---|
[b1daf0f] | 1794 | switch (i) |
---|
| 1795 | { |
---|
| 1796 | case 4: |
---|
| 1797 | p += 5; |
---|
| 1798 | break; |
---|
| 1799 | case 10: |
---|
| 1800 | p += 4; |
---|
| 1801 | break; |
---|
| 1802 | default: |
---|
| 1803 | p += 2; |
---|
| 1804 | break; |
---|
[07d6fd5] | 1805 | } |
---|
[b1daf0f] | 1806 | } |
---|
[d2e0bb3] | 1807 | #if MSDOS_FIND_PRINT |
---|
[b1daf0f] | 1808 | printf ( "\n" ); |
---|
[d2e0bb3] | 1809 | #endif |
---|
[6c988987] | 1810 | *MSDOS_DIR_ENTRY_TYPE(entry) = lfn_entries - lfn_entry; |
---|
[b1daf0f] | 1811 | if (lfn_entry == 0) |
---|
| 1812 | *MSDOS_DIR_ENTRY_TYPE(entry) |= MSDOS_LAST_LONG_ENTRY; |
---|
| 1813 | *MSDOS_DIR_ATTR(entry) |= MSDOS_ATTR_LFN; |
---|
[07d6fd5] | 1814 | |
---|
[b1daf0f] | 1815 | entry += MSDOS_DIRECTORY_ENTRY_STRUCT_SIZE; |
---|
[07d6fd5] | 1816 | } |
---|
[b1daf0f] | 1817 | |
---|
| 1818 | /* Short file name entry */ |
---|
| 1819 | memcpy(entry, name_dir_entry, MSDOS_DIRECTORY_ENTRY_STRUCT_SIZE); |
---|
| 1820 | |
---|
[6c988987] | 1821 | length = (lfn_entries + 1) * MSDOS_DIRECTORY_ENTRY_STRUCT_SIZE; |
---|
[b1daf0f] | 1822 | bytes_written = fat_file_write(&fs_info->fat, fat_fd, |
---|
| 1823 | empty_file_offset, |
---|
| 1824 | length, fs_info->cl_buf); |
---|
| 1825 | if (bytes_written == (ssize_t) length) |
---|
| 1826 | return 0; |
---|
| 1827 | else if (bytes_written == -1) |
---|
| 1828 | return -1; |
---|
| 1829 | else |
---|
| 1830 | rtems_set_errno_and_return_minus_one(EIO); |
---|
[d2e0bb3] | 1831 | } |
---|
| 1832 | |
---|
| 1833 | int |
---|
| 1834 | msdos_find_name_in_fat_file ( |
---|
| 1835 | rtems_filesystem_mount_table_entry_t *mt_entry, |
---|
| 1836 | fat_file_fd_t *fat_fd, |
---|
| 1837 | bool create_node, |
---|
| 1838 | const uint8_t *name_utf8, |
---|
| 1839 | int name_utf8_len, |
---|
| 1840 | msdos_name_type_t name_type, |
---|
| 1841 | fat_dir_pos_t *dir_pos, |
---|
| 1842 | char *name_dir_entry) |
---|
| 1843 | { |
---|
| 1844 | int retval = 0; |
---|
| 1845 | msdos_fs_info_t *fs_info = mt_entry->fs_info; |
---|
| 1846 | ssize_t name_len_for_save; |
---|
| 1847 | ssize_t name_len_for_compare; |
---|
| 1848 | uint32_t bts2rd = 0; |
---|
[b1daf0f] | 1849 | uint32_t empty_file_offset = 0; |
---|
| 1850 | uint32_t empty_entry_count = 0; |
---|
[6c988987] | 1851 | unsigned int lfn_entries; |
---|
[d2e0bb3] | 1852 | rtems_dosfs_convert_control *converter = fs_info->converter; |
---|
| 1853 | void *buffer = converter->buffer.data; |
---|
| 1854 | size_t buffer_size = converter->buffer.size; |
---|
| 1855 | |
---|
| 1856 | assert(name_utf8_len > 0); |
---|
| 1857 | |
---|
| 1858 | fat_dir_pos_init(dir_pos); |
---|
| 1859 | |
---|
| 1860 | |
---|
[0a7278e] | 1861 | |
---|
[d2e0bb3] | 1862 | if (FAT_FD_OF_ROOT_DIR(fat_fd) && |
---|
| 1863 | (fs_info->fat.vol.type & (FAT_FAT12 | FAT_FAT16))) |
---|
| 1864 | bts2rd = fat_fd->fat_file_size; |
---|
| 1865 | else |
---|
| 1866 | bts2rd = fs_info->fat.vol.bpc; |
---|
| 1867 | |
---|
| 1868 | switch ( name_type ) { |
---|
| 1869 | case MSDOS_NAME_SHORT: |
---|
| 1870 | name_len_for_compare = msdos_filename_utf8_to_short_name_for_compare ( |
---|
| 1871 | converter, |
---|
| 1872 | name_utf8, |
---|
| 1873 | name_utf8_len, |
---|
| 1874 | buffer, |
---|
| 1875 | MSDOS_SHORT_NAME_LEN); |
---|
| 1876 | if (name_len_for_compare > 0) { |
---|
[6c988987] | 1877 | lfn_entries = 0; |
---|
[d2e0bb3] | 1878 | } |
---|
| 1879 | else |
---|
| 1880 | retval = -1; |
---|
| 1881 | break; |
---|
| 1882 | case MSDOS_NAME_LONG: |
---|
| 1883 | name_len_for_save = msdos_filename_utf8_to_long_name_for_save ( |
---|
| 1884 | converter, |
---|
| 1885 | name_utf8, |
---|
| 1886 | name_utf8_len, |
---|
| 1887 | buffer, |
---|
| 1888 | buffer_size); |
---|
| 1889 | if (name_len_for_save > 0) { |
---|
[6c988987] | 1890 | lfn_entries = (name_len_for_save + MSDOS_LFN_ENTRY_SIZE - 1) |
---|
[83a4cbb] | 1891 | / MSDOS_LFN_ENTRY_SIZE; |
---|
[d2e0bb3] | 1892 | name_len_for_compare = msdos_filename_utf8_to_long_name_for_compare ( |
---|
| 1893 | converter, |
---|
| 1894 | name_utf8, |
---|
| 1895 | name_utf8_len, |
---|
| 1896 | buffer, |
---|
| 1897 | buffer_size); |
---|
| 1898 | if (0 >= name_len_for_compare) { |
---|
| 1899 | retval = -1; |
---|
| 1900 | } |
---|
| 1901 | } |
---|
| 1902 | else |
---|
| 1903 | retval = -1; |
---|
| 1904 | break; |
---|
| 1905 | default: |
---|
| 1906 | errno = EINVAL; |
---|
| 1907 | retval = -1; |
---|
| 1908 | break; |
---|
| 1909 | } |
---|
| 1910 | if (retval == RC_OK) { |
---|
| 1911 | /* See if the file/directory does already exist */ |
---|
| 1912 | retval = msdos_find_file_in_directory ( |
---|
| 1913 | buffer, |
---|
| 1914 | name_len_for_compare, |
---|
| 1915 | name_len_for_save, |
---|
| 1916 | name_type, |
---|
| 1917 | fs_info, |
---|
| 1918 | fat_fd, |
---|
| 1919 | bts2rd, |
---|
| 1920 | create_node, |
---|
[6c988987] | 1921 | lfn_entries, |
---|
[d2e0bb3] | 1922 | name_dir_entry, |
---|
| 1923 | dir_pos, |
---|
[b1daf0f] | 1924 | &empty_file_offset, |
---|
| 1925 | &empty_entry_count); |
---|
[d2e0bb3] | 1926 | } |
---|
| 1927 | /* Create a non-existing file/directory if requested */ |
---|
| 1928 | if ( retval == RC_OK |
---|
| 1929 | && create_node) { |
---|
| 1930 | switch (name_type) { |
---|
| 1931 | case MSDOS_NAME_SHORT: |
---|
| 1932 | name_len_for_save = msdos_filename_utf8_to_short_name_for_save ( |
---|
| 1933 | converter, |
---|
| 1934 | name_utf8, |
---|
| 1935 | name_utf8_len, |
---|
| 1936 | buffer, |
---|
| 1937 | MSDOS_SHORT_NAME_LEN); |
---|
| 1938 | if (name_len_for_save > 0 ) { |
---|
[6c988987] | 1939 | lfn_entries = 0; |
---|
[d2e0bb3] | 1940 | } |
---|
| 1941 | else |
---|
| 1942 | retval = -1; |
---|
| 1943 | break; |
---|
| 1944 | case MSDOS_NAME_LONG: |
---|
| 1945 | name_len_for_save = msdos_filename_utf8_to_long_name_for_save ( |
---|
| 1946 | converter, |
---|
| 1947 | name_utf8, |
---|
| 1948 | name_utf8_len, |
---|
| 1949 | buffer, |
---|
| 1950 | buffer_size); |
---|
| 1951 | if (name_len_for_save > 0) { |
---|
[6c988987] | 1952 | lfn_entries = (name_len_for_save + MSDOS_LFN_ENTRY_SIZE - 1) |
---|
[83a4cbb] | 1953 | / MSDOS_LFN_ENTRY_SIZE; |
---|
[d2e0bb3] | 1954 | } |
---|
| 1955 | else |
---|
| 1956 | retval = -1; |
---|
| 1957 | break; |
---|
| 1958 | default: |
---|
| 1959 | errno = EINVAL; |
---|
| 1960 | retval = -1; |
---|
| 1961 | break; |
---|
| 1962 | } |
---|
[4c9f02d] | 1963 | |
---|
| 1964 | if (retval == RC_OK) |
---|
| 1965 | retval = msdos_add_file ( |
---|
| 1966 | buffer, |
---|
| 1967 | name_type, |
---|
| 1968 | fs_info, |
---|
| 1969 | fat_fd, |
---|
| 1970 | bts2rd, |
---|
[6c988987] | 1971 | lfn_entries, |
---|
[4c9f02d] | 1972 | name_dir_entry, |
---|
| 1973 | dir_pos, |
---|
[b1daf0f] | 1974 | empty_file_offset, |
---|
| 1975 | empty_entry_count |
---|
[4c9f02d] | 1976 | ); |
---|
[d2e0bb3] | 1977 | } |
---|
| 1978 | |
---|
| 1979 | return retval; |
---|
[f36a7bfc] | 1980 | } |
---|
| 1981 | |
---|
[d2e0bb3] | 1982 | |
---|
[f36a7bfc] | 1983 | /* msdos_find_node_by_cluster_num_in_fat_file -- |
---|
| 1984 | * Find node with specified number of cluster in fat-file. |
---|
| 1985 | * |
---|
[07d6fd5] | 1986 | * Note, not updated in the LFN change because it is only used |
---|
| 1987 | * for . and .. entries and these are always short. |
---|
| 1988 | * |
---|
[f36a7bfc] | 1989 | * PARAMETERS: |
---|
[a5305f6b] | 1990 | * mt_entry - mount table entry |
---|
| 1991 | * fat_fd - fat-file descriptor |
---|
| 1992 | * cl4find - number of cluster to find |
---|
[f36a7bfc] | 1993 | * paux - identify a node location on the disk - |
---|
| 1994 | * cluster num and offset inside the cluster |
---|
| 1995 | * dir_entry - placeholder for found node |
---|
| 1996 | * |
---|
| 1997 | * RETURNS: |
---|
| 1998 | * RC_OK on success, or error code if error occured |
---|
| 1999 | * |
---|
| 2000 | */ |
---|
[e197621] | 2001 | int msdos_find_node_by_cluster_num_in_fat_file( |
---|
[f36a7bfc] | 2002 | rtems_filesystem_mount_table_entry_t *mt_entry, |
---|
| 2003 | fat_file_fd_t *fat_fd, |
---|
[a5305f6b] | 2004 | uint32_t cl4find, |
---|
[07d6fd5] | 2005 | fat_dir_pos_t *dir_pos, |
---|
[f36a7bfc] | 2006 | char *dir_entry |
---|
| 2007 | ) |
---|
| 2008 | { |
---|
[e197621] | 2009 | int rc = RC_OK; |
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[f36a7bfc] | 2010 | ssize_t ret = 0; |
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| 2011 | msdos_fs_info_t *fs_info = mt_entry->fs_info; |
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[a5305f6b] | 2012 | uint32_t bts2rd = 0; |
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[f91bbe64] | 2013 | uint32_t i = 0, j = 0; |
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[f36a7bfc] | 2014 | |
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[a5305f6b] | 2015 | if (FAT_FD_OF_ROOT_DIR(fat_fd) && |
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[f36a7bfc] | 2016 | (fs_info->fat.vol.type & (FAT_FAT12 | FAT_FAT16))) |
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[a5305f6b] | 2017 | bts2rd = fat_fd->fat_file_size; |
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[f36a7bfc] | 2018 | else |
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| 2019 | bts2rd = fs_info->fat.vol.bpc; |
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| 2020 | |
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[c65afce4] | 2021 | while ((ret = fat_file_read(&fs_info->fat, fat_fd, j * bts2rd, bts2rd, |
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[f36a7bfc] | 2022 | fs_info->cl_buf)) != FAT_EOF) |
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| 2023 | { |
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| 2024 | if ( ret < MSDOS_DIRECTORY_ENTRY_STRUCT_SIZE ) |
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[3899a537] | 2025 | rtems_set_errno_and_return_minus_one( EIO ); |
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[f36a7bfc] | 2026 | |
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| 2027 | assert(ret == bts2rd); |
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[a5305f6b] | 2028 | |
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[f36a7bfc] | 2029 | for (i = 0; i < bts2rd; i += MSDOS_DIRECTORY_ENTRY_STRUCT_SIZE) |
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| 2030 | { |
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[07d6fd5] | 2031 | char* entry = (char*) fs_info->cl_buf + i; |
---|
[0a7278e] | 2032 | |
---|
[f36a7bfc] | 2033 | /* if this and all rest entries are empty - return not-found */ |
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[07d6fd5] | 2034 | if ((*MSDOS_DIR_ENTRY_TYPE(entry)) == |
---|
[f36a7bfc] | 2035 | MSDOS_THIS_DIR_ENTRY_AND_REST_EMPTY) |
---|
| 2036 | return MSDOS_NAME_NOT_FOUND_ERR; |
---|
| 2037 | |
---|
[a5305f6b] | 2038 | /* if this entry is empty - skip it */ |
---|
[07d6fd5] | 2039 | if ((*MSDOS_DIR_ENTRY_TYPE(entry)) == |
---|
[f36a7bfc] | 2040 | MSDOS_THIS_DIR_ENTRY_EMPTY) |
---|
| 2041 | continue; |
---|
| 2042 | |
---|
| 2043 | /* if get a non-empty entry - compare clusters num */ |
---|
[07d6fd5] | 2044 | if (MSDOS_EXTRACT_CLUSTER_NUM(entry) == cl4find) |
---|
[f36a7bfc] | 2045 | { |
---|
| 2046 | /* on success fill aux structure and copy all 32 bytes */ |
---|
[c65afce4] | 2047 | rc = fat_file_ioctl(&fs_info->fat, fat_fd, F_CLU_NUM, j * bts2rd, |
---|
[07d6fd5] | 2048 | &dir_pos->sname.cln); |
---|
[f36a7bfc] | 2049 | if (rc != RC_OK) |
---|
| 2050 | return rc; |
---|
| 2051 | |
---|
[07d6fd5] | 2052 | dir_pos->sname.ofs = i; |
---|
| 2053 | dir_pos->lname.cln = FAT_FILE_SHORT_NAME; |
---|
| 2054 | dir_pos->lname.ofs = FAT_FILE_SHORT_NAME; |
---|
[0a7278e] | 2055 | |
---|
[07d6fd5] | 2056 | memcpy(dir_entry, entry, |
---|
[f36a7bfc] | 2057 | MSDOS_DIRECTORY_ENTRY_STRUCT_SIZE); |
---|
| 2058 | return RC_OK; |
---|
| 2059 | } |
---|
[a5305f6b] | 2060 | } |
---|
[f36a7bfc] | 2061 | j++; |
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[a5305f6b] | 2062 | } |
---|
[f36a7bfc] | 2063 | return MSDOS_NAME_NOT_FOUND_ERR; |
---|
| 2064 | } |
---|
[86ef0df] | 2065 | |
---|
| 2066 | int |
---|
| 2067 | msdos_sync(rtems_libio_t *iop) |
---|
| 2068 | { |
---|
| 2069 | int rc = RC_OK; |
---|
| 2070 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
| 2071 | msdos_fs_info_t *fs_info = iop->pathinfo.mt_entry->fs_info; |
---|
| 2072 | |
---|
| 2073 | sc = rtems_semaphore_obtain(fs_info->vol_sema, RTEMS_WAIT, |
---|
| 2074 | MSDOS_VOLUME_SEMAPHORE_TIMEOUT); |
---|
| 2075 | if (sc != RTEMS_SUCCESSFUL) |
---|
| 2076 | rtems_set_errno_and_return_minus_one(EIO); |
---|
| 2077 | |
---|
[0f0db894] | 2078 | rc = fat_sync(&fs_info->fat); |
---|
[86ef0df] | 2079 | |
---|
| 2080 | rtems_semaphore_release(fs_info->vol_sema); |
---|
| 2081 | return rc; |
---|
| 2082 | } |
---|