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The Suffix Type column in the above table defines the format of the suffix to be used with the corresponding Entity Identifier. These different suffix types are defined in the following paragraphs. NOTE: All Identifiers defined in this document (appendix 6.16.1) shall be registered by OSTA as UDF Identifiers. 2.1.5.3 char IdentifierSuffix[8] The format of the IdentifierSuffix field is dependent on the type of the Identifier. In regard to OSTA Domain Entity Identifiers specified in this document (appendix 6.16.1) the IdentifierSuffix field shall be constructed as follows: Domain IdentifierSuffix field format RBP Length Name Contents 0 2 UDF Revision Uint16 (= #0201)0250) 2 1 Domain Flags Uint8 3 5 Reserved bytes (= #00) The UDFRevision field shall contain #02010250 to indicate revision 2.0150 of this document. This field will allow an implementation to detect changes made in newer revisions of this document. The OSTA Domain Identifiers are only used in the Logical Volume Descriptor and the File Set Descriptor. The DomainFlags field defines the following bit flags: Bit 0 Hard Write-Protect 1 Soft Write-Protect 2-7 Reserved Domain Flags Description The SoftWriteProtect flag is a user settable flag that indicates that the volume or file system structures within the scope of the descriptor in which it resides are write protected. A SoftWriteProtect flag value of ONE shall indicate user write protected structures. This flag may be set or reset by the user. The HardWriteProtect flag is an implementation settable flag that indicates that the scope of the descriptor in which it resides is permanently write protected. A HardWriteProtect flag value of ONE shall indicate a permanently write protected structure. Once set this flag shall not be reset. The HardWriteProtect flag overrides the SoftWriteProtect flag. The write protect flags appear in the Logical Volume Descriptor and in the File Set Descriptor. They shall be interpreted as follows: UDF 2.01 17 March50 April
is_fileset_write_protected = LVD.HardWriteProtect || LVD.SoftWriteProtect || FSD.HardWriteProtect || FSD.SoftWriteProtect is_fileset_hard_protected = LVD.HardWriteProtect || FSD.HardWriteProtect is_fileset_soft_protected = (LVD.SoftWriteProtect || FSD.SoftWriteProtect) && (! !is_volfileset_hard_protected) is_vol_write_protected = LVD.HardWriteProtect || LVD.SoftWriteProtect is_vol_hard_protected = LVD.HardWriteProtect is_vol_soft_protected = LVD.SoftWriteProtect && !LVD.HardWriteProtect Implementation use Entity Identifiers defined by UDF (appendix 6.1) the IdentifierSuffix field shall be constructed as follows: UDF IdentifierSuffix RBP Length Name Contents 0 2 UDF Revision Uint16 (= #0201)0250) 2 1 OS Class Uint8 3 1 OS Identifier Uint8 4 4 Reserved bytes (= #00) The contents of the OS Class and OS Identifier fields are described in the Appendix on Operating System Identifiers. For implementation use Entity Identifiers not defined by UDF the IdentifierSuffix field shall be constructed as follows: Implementation IdentifierSuffix RBP Length Name Contents 0 1 OS Class Uint8 1 1 OS Identifier Uint8 2 6 Implementation Use Area bytes NOTE: It is important to understand the intended use and importance of the OS Class and OS Identifier fields. The main purpose of these fields is to aid in debugging when problems are found on a UDF volume. The fields also provide useful information that could be provided to the end user. When set correctly these two fields provide an implementation with information such as the following: • Identify under which operating system a particular structure was last modified. • Identify under which operating system a specific file or directory was last modified. • If a developer supports multiple operating systems with their implementation, it helps to determine under which operating system a problem may have occurred. UDF 2.01 18 March50 April
Page 1 and 2: Universal Disk Format ® Specificat
Page 3 and 4: REVISION HISTORY 1.00 October 24, 1
Page 6 and 7: CONTENTS 1. INTRODUCTION ..........
Page 8 and 9: 6.4 OSTA Compressed Unicode Algorit
Page 10 and 11: 1. Introduction The OSTA Universal
Page 12 and 13: 1.2 Compliance This document requir
Page 14 and 15: Media Block Address NOTE 1: This is
Page 16 and 17: 1.3.3 Terms May Optional Shall Shou
Page 18 and 19: non-overlapping Partitions with 2 p
Page 20 and 21: 2.1 Part 1 - General 2.1.1 Characte
Page 22 and 23: length of the field. The characters
Page 24 and 25: 2.1.5.2 char Identifier[23] Unless
Page 28 and 29: For an Application Entity Identifie
Page 30 and 31: 2.2 Part 3 - Volume Structure 2.2.1
Page 32 and 33: 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 84 and 85:
3.3.3.5 byte Extended Attributes Se
Page 86 and 87:
ignored and the file creation time
Page 88 and 89:
3.3.4.5.1.1 FreeEASpace This extend
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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
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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
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Definitions: A FileIdentifier shall
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3. Invalid Characters: A FileIdenti
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4. Trailing Periods and Spaces: All
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If there is a file extension then t
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defined as space that is not direct
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UDF 2.01 111 March50 April
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6.2 UDF Entity Identifier Values En
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8 0 BeOS - generic 9 0 Windows CE -
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} } returnValue = unicodeIndex; } r
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} return crc; #ifdef MAIN unsigned
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6.6 Algorithm for Strategy Type 409
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nameLen = udfNameLen; } else { /* A
Page 134 and 135:
} needsCRC = TRUE; /* Append the CR
Page 136 and 137:
if (index < udfLabelLen || index ==
Page 138 and 139:
UDF 2.01 129 March50 April
Page 140 and 141:
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
Page 150 and 151:
• 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
Page 156 and 157:
ISO 9660 converted to UDF 1 st sess
Page 158 and 159:
For File Structure: 5. Unallocated
Page 160 and 161:
6.13 Recommendations for DVD+R and
Page 162 and 163:
6.13.1.4.2 Anchor Volume Descriptor
Page 164 and 165:
6.13.2.1 Requirements • The packe
Page 166 and 167:
6.126.15 UDF Media Format Revision
Page 168 and 169:
Description DCN Updated in UDF Revi
Page 170 and 171:
Registration Form Disk Format Speci
Page 172 and 173:
L Logical Block Size, 8, 9, 2425 Lo
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