From: Rob Rypka <rascal1182@...>
Date: 2005-09-18T04:37:19+09:00
Subject: Re: $SAFE >= 2

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On 9/17/05, Mark Volkmann <r.mark.volkmann@gmail.com> wrote:
>=20
> When $SAFE is >=3D 2 then code can't be loaded from "globally writable=20
> locations".
> Can someone clarify what a "globally" writable location is?
> What locations are not globally writable?
>=20

I assume you're getting this out of the "pick axe" book. Later down, they=
=20
refer to it also as "world writable," a term you might be familiar with.

It just means the permissions on the file/directory are such that any user=
=20
on the host has the ability to write to the file, rather than just a=20
particular user or group. If your system hosting the program is accessable=
=20
to lots of people, it means you could load a program that was changed and=
=20
possibly harmful.

I really don't know how it's handled on FAT filesystems (which have no=20
permission mechanism), but I assume it considers those bad as well.

Here's the first UNIX file permission tutorial that came up on Google -=20
looks decent:
http://www.dartmouth.edu/~rc/help/faq/permissions.html

Hope that helps you out.

Rob

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