sticky bit soft links

[der.hans]

moin moin,

I bet "sticky bun soft pretzels" would get more attention :).

Anyway, a new security feature is making it into 3.6 and it stops some
forms of a classic vulnerability.

http://lwn.net/Articles/503660/

Note that /var/tmp could also be used and also has the sticky bit set.

A good devel topic would be safety checks to have when opening a file.

ciao,

der.hans
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