Ubuntu
shared-mime-info package

  1. Bug #309778
  2. Comment #12

Comment 12 for bug 309778

Revision history for this message
James Stansell (jamesstansell) wrote :

OK, the spec http://java.sun.com/javase/6/docs/technotes/guides/jar/jar.html says "A JAR file is essentially a zip file that contains an optional META-INF directory." So the META-INF directory may not always exist.

Also, I couldn't find any mention in the spec (or other docs from sun) of file magic for jar files.

I believe the 0xcafe magic match is really for java class files. Most interesting jar files (especially executable jars) will have at least one class file, but once again I don't think any particular location in the file can be assumed.