dirrmtry: shared directories and can, should or must use

[Boris Samorodov]

Hi!


At The Porters Handbook 7.2.1 Cleaning up empty directories we read
http://www.freebsd.org/doc/en_US.ISO8859-1/books/porters-handbook/plist-cleaning.html#PLIST-DIR-CLEANING

"However, sometimes @dirrm will give you errors because other ports
share the same directory. You can use @dirrmtry to remove only empty
directories without warning."

I don't quite understand the term "can" here. Is it supposed may,
should or must use @dirrmtry?

And what about non-empty but shared directories? May, should or must
we use @dirrmtry?

Is this command supposed to work only when building packages
(i.e. at pointyhat) or is it intended to be useful at other
servers/workstations (i.e. not to disturb administrators when
upgrading their systems)?


Thank you.
-- 
Boris B. Samorodov, Research Engineer
InPharmTech Co,     http://www.ipt.ru
Telephone & Internet Service Provider