SCO compress LZH

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'''SCO compress LZH''' refers to a compressed file format that can be created by the SCO Unix version of the <code>compress</code> utility, as an alternative to the [[compress|standard compress format]]. The LZH format usually has a better compression ratio. The <code>-H</code> option must be used to create such files.
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'''SCO compress LZH''' refers to a compressed file format that can be created by the SCO Unix version of the <code>compress</code> utility, as an alternative to the [[compress (Unix)|standard compress format]]. The LZH format usually has a better compression ratio. The <code>-H</code> option must be used to create such files.
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The man page says "Portions of this code used for Lempel-Ziv-Huffman encoding were based on Rahul Dhesi's [[Zoo]] archiver which was adapted from Haruhiko Okumura's [[Ar (Haruhiko Okumura)|ar archiver]]".
  
 
== Identification ==
 
== Identification ==
 
Files begin with signature bytes {{magic|1f a0}}.
 
Files begin with signature bytes {{magic|1f a0}}.
  
Compare to [[compress#Identification]].
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Compare to [[compress (Unix)#Identification]].
  
 
== Software ==
 
== Software ==
* [https://www.gnu.org/software/gzip/ GNU gzip] can decompress the format.
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* [https://www.gnu.org/software/gzip/ GNU Gzip]
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* {{Deark}}
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* [https://github.com/temisu/ancient Ancient]
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== Sample files ==
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* {{DexvertSamples|archive/scoCompress}}
  
 
== Links ==
 
== Links ==
 
* [http://osr600doc.sco.com/en/man/html.C/compress.C.html SCO compress man page]
 
* [http://osr600doc.sco.com/en/man/html.C/compress.C.html SCO compress man page]
  
== Editors' notes ==
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[[Category:File formats with extension .z]]
 
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The man page says "Portions of this code used for Lempel-Ziv-Huffman encoding were based on Rahul Dhesi's [[ZOO|zoo]] archiver which was adapted from Haruhiko Okumura's [[ar (Haruhiko Okumura)|ar]] archiver".
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Gzip says "The code in this file is directly derived from the public domain 'ar002' written by Haruhiko Okumura."
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Note that Haruhiko Okumura was also involved in the development of [[LHArc]].
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Possibly-relevant software:
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* [https://oku.edu.mie-u.ac.jp/~okumura/compression/ar002/ ar002]
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* https://github.com/WWelna/lzh-improved
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[[Category:File formats with case sensitive extensions]]
 
[[Category:File formats with case sensitive extensions]]

Latest revision as of 02:55, 28 December 2023

File Format
Name SCO compress LZH
Ontology
Extension(s) .Z

SCO compress LZH refers to a compressed file format that can be created by the SCO Unix version of the compress utility, as an alternative to the standard compress format. The LZH format usually has a better compression ratio. The -H option must be used to create such files.

The man page says "Portions of this code used for Lempel-Ziv-Huffman encoding were based on Rahul Dhesi's Zoo archiver which was adapted from Haruhiko Okumura's ar archiver".

Contents

[edit] Identification

Files begin with signature bytes 1f a0.

Compare to compress (Unix)#Identification.

[edit] Software

[edit] Sample files

[edit] Links

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