[TUHS] Who's behind the UNIX filesystem permission
krewat at kilonet.net
Sat Aug 3 01:17:31 AEST 2019
On 8/2/2019 10:35 AM, Noel Chiappa wrote:
> > From: Arthur Krewat
> > there's the setuid bit on directories - otherwise known as the sticky
> > bit.
> Minor nit; in V6 at least (not sure about later), the 'sticky' bit was a
> separate bit from SUID and SGID. (When set on a pure/split object file, it
> told the OS to retain the text image on the swap device even when no active
> process was using it. Hence the name...)
Ah yes, I remember that now... sorry.
Sticky bit is the low-order bit on the first octet which is usually left
off and assumed to be zero. So to set it, it would be 1755. 4755 would
be setuid. Woops.
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