jexec vs jarwrapper

[Mathieu Malaterre <malat@debian.org>]

[CC me please]

Could someone please describe what is going with binfmts and jar files ?

This is a followup from #764630. On my brand new jessie (amd64) system
I can see:

$ cat /proc/sys/fs/binfmt_misc/jar
enabled
interpreter /usr/bin/jexec
flags:
offset 0
magic 504b0304

while:

$ cat /proc/sys/fs/binfmt_misc/jarwrapper
enabled
interpreter /usr/lib/binfmt-support/run-detectors
flags:
offset 0
magic 504b0304

Why do we have two binfmts handlers for the same magic ?

Thanks for clarification