Sunzip

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File Format
Name Sunzip
Ontology
Extension(s) .sz
Released 1997[1]
Not related to the sunzip utility by Mark Adler [1].

Szip, AKA Sunzip[2], is a file compression utility and compressed file format. It was written by Michael Schindler. Due to changes in the program, there are actually 3 incompatible Szip formats[3]:

  • the format used from v. 1.00 to v. 1.04;
  • then, the format used in version 1.05X and its subversions (the "X" does not stand for anything; this is actually part of the version number[1]);
  • and then, the format used for version 1.10 (which came immediately after the 1.05Xs[1]) and above.

Contents

Extensions

The author "recommend[s] using .sz for szipped files and .tar.sz or .tsz for szipped tarfiles".[3]

Identification

For v1.10+, Szip files start with 0x53 0x5a 0x0a 0x04.[4]

The older versions of the format have no obvious signature, and are probably not easy to identify.

Software

Links

References

  1. 1.0 1.1 1.2 V. 1.12a, source → history
  2. V. 1.11 DOS distribution → README.TXT
  3. 3.0 3.1 V. 1.12a, source → readme
  4. V. 1.11 DOS distribution → SZ_FORMT.TXT
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