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Are there anything like this under OpenBSD?

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Yes, of course. It's standard. (And there're more, also non-standard, security features in OpenBSD.)

(If you meant "are there any files with these bits set", try find / -type f \( -perm -4000 -o -perm -2000\) -print)

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Interesting, I didn't know Dennis Ritchie got a patent for suid/sgid (placed in the public domain; would have expired by how anyway) – Kevin Jan 27 '12 at 16:09
I'm just asking because of this for ex.: blog.zx2c4.com/749 - so there could be security bugs regarding SUID bits. Couldn't they be turned off?? – LanceBaynes Jan 30 '12 at 11:17

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