Extended Attributes: Difference between revisions

Latest revision as of 02:48, 7 November 2019

Extended Attributes (EA) are a property of directories as well as of files.

Implementation depends on underlying file systems.

Functions

DosOpen2 for adding EAs to new or existing files
DosMkDir2 for adding EAs to new directories
DosQFileInfo, DosQPathInfo to read EAs
DosFindFirst, DosFindNext to search for files with specific EAs

Standard Extended Attributes

Predefined file types
Assembler Code BASIC Code Binary Data Bitmap C Code COBOL Code DOS Command File Dynamic Link Library Executable FORTRAN Code Icon Library Metafile Pascal Code Plain Text Resource File

.TYPE: type of files (ASCII)
.KEYPHRASES: text key phrases (ASCII)
.SUBJECT: brief summary of content (ASCII single-value)
.COMMENTS: Notes (multi-value)
.HISTORY: file modification (ASCII)
.VERSION: version number (ASCII or binary)
.ICON: binary icon data
.ASSOCTABLE: association
.HPFSNAME: long name

Usage

REXX interpreter

REXX.METACONTROL
REXX.PROGRAMDATA

System Editor

.TYPE

Multimedia Presentation Manager/2

.MMPREF_MMAUDIO
.MMPREF_MMIMAGE
.POSTER

Workplace Shell

.CLASSINFO
.ICON
.ICONPOS
.LONGNAME
.TYPE

Articles

Roger Orr: Extended Attributes - what are they and how can you use them ? - (May 1993)
Björn Fahller: Encapsulating Extended Attributes Part 1 (May 1996), Part 2 (Jun 1996)

Links

Implementation of extended attributes on the FAT file system (Bob Eager)

@@ Line 1: / Line 1: @@
-Extended Attributes (EA)
+Extended Attributes (EA) are a property of directories as well as of files.
+Implementation depends on underlying [[file systems]].
+==Functions==
+*[[DosOpen2]] for adding EAs to new or existing files
+*[[DosMkDir2]] for adding EAs to new directories
+*[[DosQFileInfo]], [[DosQPathInfo]] to read EAs
+*[[DosFindFirst]], [[DosFindNext]] to search for files with specific EAs
+==Standard Extended Attributes==
+{|class="wikitable" align=right
+|+Predefined file types
+|
+ Assembler Code
+ BASIC Code
+ Binary Data
+ Bitmap
+ C Code
+ COBOL Code
+ DOS Command File
+ Dynamic Link Library
+ Executable
+ FORTRAN Code
+ Icon
+ Library
+ Metafile
+ Pascal Code
+ Plain Text
+ Resource File
+|}
+;.TYPE:type of files (ASCII)
+;.KEYPHRASES:text key phrases (ASCII)
+;.SUBJECT:brief summary of content (ASCII single-value)
+;.COMMENTS:Notes (multi-value)
+;.HISTORY:file modification (ASCII)
+;.VERSION:version number (ASCII or binary)
+;.ICON:binary icon data
+;.ASSOCTABLE:association
+;.HPFSNAME:long name
+==Usage==
+;REXX interpreter
+ REXX.METACONTROL
+ REXX.PROGRAMDATA
+;System Editor
+ .TYPE
+;Multimedia Presentation Manager/2
+ .MMPREF_MMAUDIO
+ .MMPREF_MMIMAGE
+ .POSTER
+;Workplace Shell
+ .CLASSINFO
+ .ICON
+ .ICONPOS
+ .LONGNAME
+ .TYPE
 ==Articles==
-*[[Extended Attributes - what are they and how can you use them ?]]
+*Roger Orr: [[Extended Attributes - what are they and how can you use them ?]] - (May 1993)
+*Björn Fahller: Encapsulating Extended Attributes [[Encapsulating Extended Attributes - Part 1/2|Part 1]] (May 1996), [[Encapsulating Extended Attributes - Part 2/2|Part 2]] (Jun 1996)
+==Links==
+*[http://www.tavi.co.uk/os2pages/eadata.html Implementation of extended attributes on the FAT file system] (Bob Eager)
+[[Category:File system]]