Zoo
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* '''Sez''' - Self-Extracting Zoo utility | * '''Sez''' - Self-Extracting Zoo utility | ||
− | + | == Compression methods == | |
− | + | ||
− | + | ||
− | == Compression == | + | |
− | + | ||
{| class="wikitable" | {| class="wikitable" | ||
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|2 || LZH || [[LZ77 with Huffman coding|LZ77+Huffman]]. Nearly identical to [[LHA]]'s "lh5" method. A small difference is that Zoo defines a way to mark the end of data. The format is pretty well documented in the comments in unzoo.c by Martin Schoenert (see below). | |2 || LZH || [[LZ77 with Huffman coding|LZ77+Huffman]]. Nearly identical to [[LHA]]'s "lh5" method. A small difference is that Zoo defines a way to mark the end of data. The format is pretty well documented in the comments in unzoo.c by Martin Schoenert (see below). | ||
|} | |} | ||
+ | |||
+ | == Identification == | ||
+ | Files have bytes {{magic|DC A7 C4 FD}} at offset 20. | ||
+ | |||
+ | == Related formats == | ||
+ | * [[Zoo Z format]] | ||
== Specifications == | == Specifications == | ||
+ | ''[Ed. note: The Zoo format information in these documents is not of the highest quality. We haven't found a specification that is reasonably complete and correct.]'' | ||
+ | |||
* [https://www.fileformat.info/format/zoo/corion.htm The ZOO Archive File Format] from Corion.net, via FileFormat.info | * [https://www.fileformat.info/format/zoo/corion.htm The ZOO Archive File Format] from Corion.net, via FileFormat.info | ||
* [http://apple2.org.za/gswv/a2zine/GS.WorldView/Resources/The.MacShrinkIt.Project/ARCHIVES.TXT Archive format info, including ZOO] | * [http://apple2.org.za/gswv/a2zine/GS.WorldView/Resources/The.MacShrinkIt.Project/ARCHIVES.TXT Archive format info, including ZOO] | ||
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* {{Deark}} | * {{Deark}} | ||
− | Source code for at least Zoo versions 2.01 and 2.1 (a.k.a. 2.10) was made public. There does not seem to be a centralized project to maintain it. | + | Source code for at least Zoo versions 2.01 and 2.1 (a.k.a. 2.10) was made public. There does not seem to be a centralized project to maintain it. Some Linux distributions and other organizations maintain their own patched versions. |
* [http://www.nic.funet.fi/index/unix/tools/zoo/zoo-2.01.tar.gz zoo-2.01.tar.gz] - original(?) v2.01 source | * [http://www.nic.funet.fi/index/unix/tools/zoo/zoo-2.01.tar.gz zoo-2.01.tar.gz] - original(?) v2.01 source | ||
* [http://www.nic.funet.fi/index/unix/tools/zoo/zoo-2.1.tar.gz zoo-2.1.tar.gz] - original(?) v2.1 source | * [http://www.nic.funet.fi/index/unix/tools/zoo/zoo-2.1.tar.gz zoo-2.1.tar.gz] - original(?) v2.1 source | ||
** Another copy: [https://mirrors.slackware.com/slackware/slackware64/source/a/zoo/] → zoo-2.10.tar.gz | ** Another copy: [https://mirrors.slackware.com/slackware/slackware64/source/a/zoo/] → zoo-2.10.tar.gz | ||
− | + | Other source code and packages: | |
* [http://distcache.freebsd.org/ports-distfiles/zoo-2.10pl1.tar.gz zoo-2.10pl1.tar.gz] | * [http://distcache.freebsd.org/ports-distfiles/zoo-2.10pl1.tar.gz zoo-2.10pl1.tar.gz] | ||
* [http://www.ibiblio.org/pub/Linux/utils/compress/zoo-2.10-3.src.rpm zoo-2.10-3.src.rpm] | * [http://www.ibiblio.org/pub/Linux/utils/compress/zoo-2.10-3.src.rpm zoo-2.10-3.src.rpm] | ||
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== Links == | == Links == | ||
* [[Wikipedia: Zoo (file format)]] | * [[Wikipedia: Zoo (file format)]] | ||
− | * {{CdTextfiles|rbbsv3n1/zzap/zooplan1.zip|zooplan1.zip}} → ZOOPLAN1.TXT - A Zoo Manifesto | + | * {{CdTextfiles|rbbsv3n1/zzap/zooplan1.zip|zooplan1.zip}} → ZOOPLAN1.TXT - A Zoo Manifesto, by Rahul Dhesi (1986-11-01) |
* {{CdTextfiles|simtelctc/disk1/ZOO/UGUIDE.ZIP;1|The zoo Archiver User's Guide}}, by Bill Davidsen (for Zoo 2.01) | * {{CdTextfiles|simtelctc/disk1/ZOO/UGUIDE.ZIP;1|The zoo Archiver User's Guide}}, by Bill Davidsen (for Zoo 2.01) | ||
+ | * [https://manpages.ubuntu.com/manpages/bionic/man1/zoo.1.html Zoo man page] - Includes a change log going back to v1.71 | ||
+ | * {{CdTextfiles|carousel344/013/ZOO121.ZIP|Zoo 1.21}} → ZOOHSTRY.TXT - Has some historical information about older versions |
Revision as of 16:32, 6 January 2021
Zoo is a compressed archive format developed by Rahul Dhesi. It was one of the many competing archive formats in the 1980s, and was based (originally) on LZW compression. It had some popularity with Open/VMS and Amiga systems, but didn't ultimately win out over ZIP.
Contents |
Discussion
The Zoo software encompassed several different utilities, which were sometimes distributed individually, and which had their own version numbers.
- Zoo - The main program
- Ooz - Extractor
- Booz (Barebones Ooz) - Extractor; some versions can also list files
- Looz (Ooz with List) - Extract/list/execute
- Atoz - Helper utility for converting other formats (ARC, LBR) to Zoo
- Fiz - Analyze damaged Zoo files
- Stuff - File finder
- Sez - Self-Extracting Zoo utility
Compression methods
ID | Name | Description |
---|---|---|
0 | No packing | Uncompressed |
1 | LZD | LZW. A fairly generic LZW implementation, with a dynamic code size from 9 to 13 bits, and two special codes: 256=Clear, 257=Stop. |
2 | LZH | LZ77+Huffman. Nearly identical to LHA's "lh5" method. A small difference is that Zoo defines a way to mark the end of data. The format is pretty well documented in the comments in unzoo.c by Martin Schoenert (see below). |
Identification
Files have bytes DC A7 C4 FD
at offset 20.
Related formats
Specifications
[Ed. note: The Zoo format information in these documents is not of the highest quality. We haven't found a specification that is reasonably complete and correct.]
- The ZOO Archive File Format from Corion.net, via FileFormat.info
- Archive format info, including ZOO
- ZOO file header format (among other archive types)
Software
- Konvertor
- Zoo - DOS binaries
- Other official Zoo utilities:
- unzoo.c by Martin Schoenert (Does not support LZD.)
- Deark
Source code for at least Zoo versions 2.01 and 2.1 (a.k.a. 2.10) was made public. There does not seem to be a centralized project to maintain it. Some Linux distributions and other organizations maintain their own patched versions.
- zoo-2.01.tar.gz - original(?) v2.01 source
- zoo-2.1.tar.gz - original(?) v2.1 source
- Another copy: [1] → zoo-2.10.tar.gz
Other source code and packages:
Sample files
- http://cd.textfiles.com/aminet0294/AMINET/UTIL/ARC/ → *.ZOO
- http://cd.textfiles.com/garbo/PC/ → .../*.ZOO
- http://cd.textfiles.com/geminiatari/ZIP/PROGRAM/ → *.ZOO
Links
- Wikipedia: Zoo (file format)
- zooplan1.zip → ZOOPLAN1.TXT - A Zoo Manifesto, by Rahul Dhesi (1986-11-01)
- The zoo Archiver User's Guide, by Bill Davidsen (for Zoo 2.01)
- Zoo man page - Includes a change log going back to v1.71
- Zoo 1.21 → ZOOHSTRY.TXT - Has some historical information about older versions