File Write Permission Rules

[Larry Dighera]

In article <630 at jonlab.UUCP> jon at jonlab.UUCP (Jon H. LaBadie) writes:
<This is a future direction of UNIX question.
<
<I stumbled upon a system with /tmp directory permissions as follows:
<
<	drwsrwxrwx ......
<
<Note the "s". 
<[...] namely a meaning for the set user id bit on directories.
<The meaning?  Anyone could create files in the directory,
<but only the owner of the directory, OR the owner of the individual
<files could remove them.
<So, the questions:
<	1. Anyone know of the future fate of this useful tweak?

At a presentation to the Orange County Unix Users Group last month the
AT&T speaker mentioned that Release 4 will support use of the suid bit
on directories.  He didn't elaberate on its use, but I'll bet this is it.

Larry Dighera


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