Hi Peter.
>>>> Again, is there any sensible reason to deny a process the
>>>> knowledge of its CWD?
>>> Vaguely, "security". Perms changes by root don't affect
>>> processes already inside the barrier.
>> And said processes could very well do a getcwd(3) as first
>> order of business in order to be able to cheat later on.
> Yes. What happens if one renames elements of the path under
> the feet of a process in unix, btw? I asssume the process
> ends up with an invalid cwd and starts having a lot of
> trouble going anywhere.
Even easier is to delete an empty directory that's the CWD of a
process. The delete works fine, with the result that the process
in question can't do `cd ..` or any relative cd but has to do an
absolute cd or a `cd ~` to get anywhere.
I've done that several times, usually by accident.
Best wishes from Riley.
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