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3.3.3.5 byte Extended Attributes Section 3.2.1 describes how the value for this field is set. For file systems using a VAT, the function of the LVHD UniqueID field in the LVID is taken over by the VAT File Entry UniqueID field, see 3.2.1.1. NOTE: For UDF 2.00 and higher, the Unique ID value used in the UDF Unique ID Mapping Data is taken from the File Identifier Descriptor rather than from the File Entry. 3.3.3.5 byte ExtendedAttributes[] Certain extended attributes should be recorded in this field of the FileEntry for performance reasons. Other extended attributes should be recorded in an ICB pointed to by the field ExtendedAttributeICB. In the section on Extended Attributes it will be specified which extended attributes should be recorded in this field. 3.3.4 Extended Attributes In order to handle some of the longer Extended Attributes (EAs) that may vary in length, the following rules apply to the EA space. 1. All EAs with an attribute length greater than or equal to a logical block shall be block aligned by starting and ending on a logical block boundary. The one and only exception to this rule is the start of the first ECMA 167 EA. 2. Smaller EAs shall be constrained to an attribute length that is a multiple of 4 bytes. 3. Each Extended Attributes Space shall appear as a single contiguous logical space constructed as follows: ECMA 167 EAs Non block aligned Implementation Use EAs Block aligned Implementation Use EAs Application Use EAs NOTE: T<strong>here</strong> may exist 2 Extended Attributes Spaces per file, one embeded in the File Entry or Extended File Entry and the other as a separate space referenced by the Extended Attribute ICB address in the File Entry or Extended File Entry. Each Extended Attributes Space, if present, must have its own Extended Attribute Header Descriptor (see the next section). UDF 2.01 75 March50 April
3.3.4.1 Extended Attribute Header Descriptor struct ExtendedAttributeHeaderDescriptor { /* ECMA 167 4/14.10.1 */ struct tag DescriptorTag; Uint32 ImplementationAttributesLocation; Uint32 ApplicationAttributesLocation; } A value in one of the location fields highlighted above equal to or greater than the length of the EA space shall be interpreted as an indication that the corresponding attribute does not exist. If an attribute associated with one of the location fields highlighted above does not exist, then the value of the corresponding location field shall be set to #FFFFFFFF. 3.3.4.2 Alternate Permissions struct AlternatePermissionsExtendedAttribute { /* ECMA 167 4/14.10.4 */ Uint32 AttributeType; Uint8 AttributeSubtype; byte Reserved[3]; Uint32 AttributeLength; Uint16 OwnerIdentification; Uint16 GroupIdentification; Uint16 Permission; } This structure shall not be recorded. 3.3.4.3 File Times Extended Attribute struct FileTimesExtendedAttribute { /* ECMA 167 4/14.10.5 */ Uint32 AttributeType; Uint8 AttributeSubtype; byte Reserved[3]; Uint32 AttributeLength; Uint32 DataLength; Uint32 FileTimeExistence; byte FileTimes; } 3.3.4.3.1 byte FileTimes If this field contains a file creation time it shall be interpreted as the creation time of the associated file. If the main File Entry is an Extended File Entry, the file creation time in this structure shall be UDF 2.01 76 March50 April
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Universal Disk Format ® Specificat
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REVISION HISTORY 1.00 October 24, 1
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CONTENTS 1. INTRODUCTION ..........
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6.4 OSTA Compressed Unicode Algorit
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1. Introduction The OSTA Universal
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1.2 Compliance This document requir
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Media Block Address NOTE 1: This is
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1.3.3 Terms May Optional Shall Shou
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non-overlapping Partitions with 2 p
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2.1 Part 1 - General 2.1.1 Characte
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length of the field. The characters
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2.1.5.2 char Identifier[23] Unless
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The Suffix Type column in the above
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For an Application Entity Identifie
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2.2 Part 3 - Volume Structure 2.2.1
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NOTE: This field is used to determi
Page 34 and 35: 2.2.4 Logical Volume Descriptor str
Page 36 and 37: 2.2.5 Unallocated Space Descriptor
Page 38 and 39: EntityID. The scope of this EntityI
Page 40 and 41: 2.2.7.2.2 dstring LogicalVolumeIden
Page 42 and 43: Layout of Type 2 partition map for
Page 44 and 45: • Bits 1-7: Reserved. Shall be se
Page 46 and 47: Virtual Allocation Table structure
Page 48 and 49: the offset and length of a partitio
Page 50 and 51: The Metadata Partition Map (see2.2.
Page 52 and 53: 2.2.13.1 Metadata File (and Metadat
Page 54 and 55: 2.2.13.4 Procedure for de-allocatin
Page 56 and 57: } struct EntityID byte byte Impleme
Page 58 and 59: 2.3.2 File Set Descriptor struct Fi
Page 60 and 61: 2.3.2.7 struct EntityID DomainIdent
Page 62 and 63: In order to assist a UDF implementa
Page 64 and 65: 2.3.5.1 Uint16 StrategyType The co
Page 66 and 67: 2.3.6 File Entry struct FileEntry {
Page 68 and 69: 2.3.6.8 FileLinkCount Hard links to
Page 70 and 71: Descriptors should be used. For exa
Page 72 and 73: 2.3.11.2 Uint32 PreviousAllocationE
Page 74 and 75: 3.2 Part 3 - Volume Structure 3.2.1
Page 76 and 77: 3.3 Part 4 - File System 3.3.1 File
Page 78 and 79: 3.3.2.1.2 Macintosh Bits 6 & 7 (Set
Page 80 and 81: 3.3.3 File Entry struct FileEntry {
Page 82 and 83: would be considered writable if the
Page 86 and 87: ignored and the file creation time
Page 88 and 89: 3.3.4.5.1.1 FreeEASpace This extend
Page 90 and 91: MacVolumeInfo format RBP Length Nam
Page 92 and 93: UDFFXInfo format (Volume IV, page 1
Page 94 and 95: The ApplicationUse area for this ex
Page 96 and 97: stream directory. If present, there
Page 98 and 99: Since the streams listed above have
Page 100 and 101: Object Logical Block Number is the
Page 102 and 103: mechanism for the host software to
Page 104 and 105: Vendor ID - The Vendor ID reported
Page 106 and 107: The OS2EA Stream contains a table o
Page 108 and 109: 4.2.2 File Identifier Descriptor st
Page 110 and 111: Definitions: A FileIdentifier shall
Page 112 and 113: 3. Invalid Characters: A FileIdenti
Page 114 and 115: 4. Trailing Periods and Spaces: All
Page 116 and 117: If there is a file extension then t
Page 118 and 119: defined as space that is not direct
Page 120 and 121: UDF 2.01 111 March50 April
Page 122 and 123: 6.2 UDF Entity Identifier Values En
Page 124 and 125: 8 0 BeOS - generic 9 0 Windows CE -
Page 126 and 127: } } returnValue = unicodeIndex; } r
Page 128 and 129: } return crc; #ifdef MAIN unsigned
Page 130 and 131: 6.6 Algorithm for Strategy Type 409
Page 132 and 133: nameLen = udfNameLen; } else { /* A
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} needsCRC = TRUE; /* Append the CR
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if (index < udfLabelLen || index ==
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UDF 2.01 129 March50 April
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unicode_t *udfName, /* (Input) Name
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} #ifdef (OS2 | WIN_95 | WIN_NT) /*
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6.8 Extended Attribute Checksum Alg
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• The data of each file shall be
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Read the File Identifier Descriptor
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• An intermediate state is allowe
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• The host shall perform read/mod
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6.10.2.6.3 Level 3 No restrictions
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ISO 9660 converted to UDF 1 st sess
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For File Structure: 5. Unallocated
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6.13 Recommendations for DVD+R and
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6.13.1.4.2 Anchor Volume Descriptor
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6.13.2.1 Requirements • The packe
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6.126.15 UDF Media Format Revision
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Description DCN Updated in UDF Revi
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Registration Form Disk Format Speci
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L Logical Block Size, 8, 9, 2425 Lo
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