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3.3.3 File Entry struct FileEntry { /* ECMA 167 4/14.9 */ struct tag DescriptorTag; struct icbtag ICBTag; Uint32 Uid; Uint32 Gid; Uint32 Permissions; Uint16 FileLinkCount; Uint8 RecordFormat; Uint8 RecordDisplayAttributes; Uint32 RecordLength; Uint64 InformationLength; Uint64 LogicalBlocksRecorded; struct timestamp AccessTime; struct timestamp ModificationTime; struct timestamp AttributeTime; Uint32 Checkpoint; struct long_ad ExtendedAttributeICB; struct EntityID ImplementationIdentifier; Uint64 UniqueID, Uint32 LengthofExtendedAttributes; Uint32 LengthofAllocationDescriptors; byte ExtendedAttributes[]; byte AllocationDescriptors[]; } NOTE: The total length of a FileEntry shall not exceed the size of one logical block. 3.3.3.1 Uint32 Uid For operating systems that do not support the concept of a user identifier the implementation shall ignore this field. For operating systems that do support this field a value of 2 32 - 1 shall indicate an invalid UID, otherwise the field contains a valid user identifier. For operating systems that do not support the concept of a user identifier the implementation shall set this field to 2 32 - 1 to indicate an invalid UID, unless otherwise specified by the user. 3.3.3.2 Uint32 Gid For operating systems that do not support the concept of a group identifier the implementation shall ignore this field. For operating systems that do support this field a value of 2 32 - 1 shall indicate an invalid GID, otherwise the field contains a valid group identifier. UDF 2.01 71 March50 April
For operating systems that do not support the concept of a group identifier the implementation shall set this field to 2 32 - 1 to indicate an invalid GID, unless otherwise specified by the user. 3.3.3.3 Uint32 Permissions /* Definitions: */ /* Bit for a File for a Directory */ /* ------- ------------------------ ---------------------------- */ /* Execute May execute file May search directory */ /* Write May change file contents May create and delete files */ /* Read May examine file contents May list files in directory */ /* ChAttr May change file attributes May change dir attributes */ /* Delete May delete file May delete directory */ #define OTHER_Execute 0x00000001 #define OTHER_Write 0x00000002 #define OTHER_Read 0x00000004 #define OTHER_ChAttr 0x00000008 #define OTHER_Delete 0x00000010 #define GROUP_Execute 0x00000020 #define GROUP_Write 0x00000040 #define GROUP_Read 0x00000080 #define GROUP_ChAttr 0x00000100 #define GROUP_Delete 0x00000200 #define OWNER_Execute 0x00000400 #define OWNER_Write 0x00000800 #define OWNER_Read 0x00001000 #define OWNER_ChAttr 0x00002000 #define OWNER_Delete 0x00004000 The concept of permissions that deals with security is not completely portable between operating systems. This document attempts to maintain consistency among implementations in processing the permission bits by addressing the following basic issues: 1. How should an implementation handle Owner, Group and Other permissions when the operating system has no concept of User and Group Ids? 2. How should an implementation process permission bits when encountered, specifically permission bits that do not directly map to an operating system supported permission bit? 3. What default values should be used for permission bits that do not directly map to an operating system supported permission bit when creating a new file? Owner, Group and Other In general, for operating systems that do not support User and Group Ids the following algorithm should be used when processing permission bits: When reading a specific permission, the logical OR of all three (owner, group, other) permissions should be the value checked. For example a file UDF 2.01 72 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
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 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
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
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6.6 Algorithm for Strategy Type 409
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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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