[HEADSUP] Disallowing read() of a directory fd

[Poul-Henning Kamp]

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In message <CAOtMX2i2Z-KX=3rYR2nZ1g1Lb_tF==H3xPKcQMBxJs1Kqr-meQ at mail.gmail.com>
, Alan Somers writes:

>Really?  When is that occasionally useful?  I've never seen anything useful
>come out of reading a directory.

Two things I have done over the years:

Figure out which filenames prevent a enormous but sparse directory
from being compacted.

Figure out which control characters were in a filename.


It might be a good idea to add a override flag on this feature,
along the lines of:

	kern.geom.debugflags=0x10


-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
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