Pack (Unix)
From Just Solve the File Format Problem
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{{DISPLAYTITLE:pack (Unix)}}'''pack''' is a command in Unix-style operating systems to compress files using [[Huffman coding]]. Files normally have a lowercase '''.z''' extension, appended to their names including any other extension they may already have in their uncompressed versions, e.g., '''file.txt.z'''. | {{DISPLAYTITLE:pack (Unix)}}'''pack''' is a command in Unix-style operating systems to compress files using [[Huffman coding]]. Files normally have a lowercase '''.z''' extension, appended to their names including any other extension they may already have in their uncompressed versions, e.g., '''file.txt.z'''. | ||
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The gzip source code mentions an "old pack format" that begins with {{magic|0x1F 0x1F}}. | The gzip source code mentions an "old pack format" that begins with {{magic|0x1F 0x1F}}. | ||
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| + | See also [[compress (Unix)#The 0x1f compression family]]. | ||
== Software == | == Software == | ||
| − | * [https://www.gnu.org/software/gzip/ GNU gzip] | + | * [https://www.gnu.org/software/gzip/ GNU gzip] (decompression only) ''[Note: Broken in v1.6 - 1.8]'' |
| − | * https://github.com/koalaman/pack | + | * [https://www.tuhs.org/cgi-bin/utree.pl?file=V10 Tenth Edition of Unix] → v10src.tar.bz2 → cmd/pack/ - Source code |
| + | * illumos: [http://src.illumos.org/source/xref/illumos-gate/usr/src/cmd/pack/ pack], [http://src.illumos.org/source/xref/illumos-gate/usr/src/cmd/unpack/ unpack] - Source code | ||
| + | * https://github.com/koalaman/pack - A modern implementation in Haskell | ||
== References == | == References == | ||
* [http://www.mkssoftware.com/docs/man1/pack.1.asp pack man page (MKS Toolkit)] | * [http://www.mkssoftware.com/docs/man1/pack.1.asp pack man page (MKS Toolkit)] | ||
* [http://publib.boulder.ibm.com/infocenter/zos/v1r13/index.jsp?topic=%2Fcom.ibm.zos.r13.bpxa500%2Fpack.htm pack man page (IBM)] | * [http://publib.boulder.ibm.com/infocenter/zos/v1r13/index.jsp?topic=%2Fcom.ibm.zos.r13.bpxa500%2Fpack.htm pack man page (IBM)] | ||
| − | * [ | + | * [https://www.vidarholen.net/contents/blog/?p=691 An ode to pack: gzip’s forgotten decompressor] |
Revision as of 16:24, 29 December 2020
pack is a command in Unix-style operating systems to compress files using Huffman coding. Files normally have a lowercase .z extension, appended to their names including any other extension they may already have in their uncompressed versions, e.g., file.txt.z.
Contents[hide] |
See also
Identification
Files begin with bytes 0x1F 0x1E.
The gzip source code mentions an "old pack format" that begins with 0x1F 0x1F.
See also compress (Unix)#The 0x1f compression family.
Software
- GNU gzip (decompression only) [Note: Broken in v1.6 - 1.8]
- Tenth Edition of Unix → v10src.tar.bz2 → cmd/pack/ - Source code
- illumos: pack, unpack - Source code
- https://github.com/koalaman/pack - A modern implementation in Haskell
