unused code in msdosfs_lookup.c ?

[Rene Ladan]

Hi,

while working on the XTAF fs module (see the archives), I discovered
that the code path in the lookup() routine which deals with
cnp->cn_nameptr being "." or ".." is never used.

To verify this, I added a printf() to the analogous code in
sys/fs/msdosfs/msdosfs_lookup.c (lines 134-145, revision 1.47), but the
following commands could not trigger the code:

% ls .
% ls ..
% file .
% file ../.
% hd .
% hd ..
% cd ..
% cd ../a/b
% ls -laoT .
% du /mountpoint

This code fakes the "." and ".." entries in the root directory of msdos
filesystems, which are otherwise absent.

So it seems like that code was either never tested or something in the
calling code changed (which would be cachedlookup() in VOP layer).

Ideas?

Regards,
Rene
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