Sticky/sgid/suid bits safe on regular files?

[Dan Strick]

Daniel O'Connor wrote:
>>
> I think he wanted to use sticky/sgid/suid because they get removed
> when the file is changed.
>>

and Dag-Erling S?rgrav responded:
>>
> no they don't.
>>

Actually, they do.  (just the sgid/suid bits)

I believe this was an ancient BSD security enhancement in case
someone accidentally left a world writeable suid file around.

Dan Strick