Compact (Unix) - Revision history

Tomxe at 09:06, 18 April 2026

2026-04-18T09:06:48Z

Dexvertbot: Change telparia.com samples link to template

2023-12-28T02:50:34Z

Change telparia.com samples link to template

Jsummers at 15:03, 12 November 2023

2023-11-12T15:03:03Z

Sembiance: Added sample files

2023-10-15T17:00:47Z

Added sample files

Jsummers: /* Software */

2023-07-11T13:02:06Z

‎Software

Jsummers at 14:15, 18 October 2020

2020-10-18T14:15:58Z

Jsummers at 13:07, 29 February 2020

2020-02-29T13:07:18Z

Jsummers at 14:52, 25 January 2020

2020-01-25T14:52:06Z

Jsummers: Created page with "{{FormatInfo |formattype=electronic |subcat=Compression |extensions={{ext|C}} |released=~1979 }} '''compact''' is an old Unix file compression utility and compressed file form..."

2020-01-04T16:39:22Z

Created page with "{{FormatInfo |formattype=electronic |subcat=Compression |extensions={{ext|C}} |released=~1979 }} '''compact''' is an old Unix file compression utility and compressed file form..."

New page

{{FormatInfo
|formattype=electronic
|subcat=Compression
|extensions={{ext|C}}
|released=~1979
}}
'''compact''' is an old Unix file compression utility and compressed file format, similar in function to [[pack]] and [[compress]]. It uses adaptive [[Huffman coding]]. It was developed by Colin L. McMaster.

It has companion utilities named <code>uncompact</code> and <code>ccat</code>.

Compacted files have a capitalized ".C" suffix.

== Identification ==
Compacted files most likely start with bytes {{magic|ff 1f}}.

However, {{magic|1f ff}} is also possible, depending on how the software was configured at compile time. It's not clear what the intent was.

== Software ==
Source code:
* http://www.retro11.de/ouxr/43bsd/usr/src/old/compact/
* https://www.tuhs.org/Archive/Distributions/UCB/4.3BSD/src.tar.gz → old/compact/*

== Links ==
* [https://www.unix.com/man-page/ultrix/1/uncompact/ Ultrix man page]
* [https://docstore.mik.ua/manuals/hp-ux/en/B2355-60130/compact.1.html HP-UX man page]

[[Category:File formats with case sensitive extensions]]

@@ Line 24: / Line 24: @@
 ** https://www.tuhs.org/Archive/Distributions/UCB/4.3BSD/src.tar.gz → old/compact/*
 * [https://github.com/temisu/ancient Ancient]
 == Sample files ==

@@ Line 26: / Line 26: @@
 == Sample files ==
-* https://telparia.com/fileFormatSamples/archive/compact/
+* {{DexvertSamples|archive/compact}}
 == Links ==

@@ Line 6: / Line 6: @@
 |released=~1979
 }}
 {{DISPLAYTITLE:compact (Unix)}}'''compact''' is an old Unix file compression utility and compressed file format, similar in function to [[Pack (Unix)|pack]] and [[compress (Unix)|compress]]. It uses [[adaptive Huffman coding]]. It was developed by Colin L. McMaster.

@@ Line 22: / Line 22: @@
 ** https://www.tuhs.org/Archive/Distributions/UCB/4.3BSD/src.tar.gz → old/compact/*
 * [https://github.com/temisu/ancient Ancient]
 == Links ==

@@ Line 6: / Line 6: @@
 |released=~1979
 }}
-{{DISPLAYTITLE:compact (Unix)}}'''compact''' is an old Unix file compression utility and compressed file format, similar in function to [[Pack (Unix)|pack]] and [[compress (Unix)|compress]]. It uses adaptive [[Huffman coding]]. It was developed by Colin L. McMaster.
+{{DISPLAYTITLE:compact (Unix)}}'''compact''' is an old Unix file compression utility and compressed file format, similar in function to [[Pack (Unix)|pack]] and [[compress (Unix)|compress]]. It uses [[adaptive Huffman coding]]. It was developed by Colin L. McMaster.
 It has companion utilities named <code>uncompact</code> and <code>ccat</code>.

@@ Line 18: / Line 18: @@
 == Software ==
-Source code:
+* compact (source code)
-* http://www.retro11.de/ouxr/43bsd/usr/src/old/compact/
+** http://www.retro11.de/ouxr/43bsd/usr/src/old/compact/
-* https://www.tuhs.org/Archive/Distributions/UCB/4.3BSD/src.tar.gz → old/compact/*
+** https://www.tuhs.org/Archive/Distributions/UCB/4.3BSD/src.tar.gz → old/compact/*
 == Links ==

@@ Line 1: / Line 1: @@
 {{FormatInfo
 |formattype=electronic
 |subcat=Compression
-|extensions={{ext|C}}, {{ext|c}}
+|extensions={{ext|C}}
 |released=~1979
 }}
-'''compact''' is an old Unix file compression utility and compressed file format, similar in function to [[pack]] and [[compress]]. It uses adaptive [[Huffman coding]]. It was developed by Colin L. McMaster.
+{{DISPLAYTITLE:compact (Unix)}}'''compact''' is an old Unix file compression utility and compressed file format, similar in function to [[Pack (Unix)|pack]] and [[compress (Unix)|compress]]. It uses adaptive [[Huffman coding]]. It was developed by Colin L. McMaster.
 It has companion utilities named <code>uncompact</code> and <code>ccat</code>.
@@ Line 25: / Line 26: @@
 * [https://docstore.mik.ua/manuals/hp-ux/en/B2355-60130/compact.1.html HP-UX man page]
 [[Category:File formats with case sensitive extensions]]