[wishlist] rm -rf to alter directories permissions if necessary

[Yaroslav Halchenko]

ATM (Debian jessie/sid with coreutils 8.23-3):

> mkdir -p d1/d2; touch d1/d2/f1; chmod -w d1/d2; rm -rf d1
rm: cannot remove ‘d1/d2/f1’: Permission denied

so to 'rm -rf d1' I need first to chmod +w all directories... although at times
fs not really an issue, but I am testing git-annex repositories with up to a
million of files.  Thus running both first recursive chmod and then rm -r
sounds (and feels) quite wasteful.  So I wondered to suggest/ask if
implementing alternation of the parent's directory permissions if --force would
be provided be a sensible extension to rm?

PS Please CC me -- I am not on the list

-- 
Yaroslav O. Halchenko, Ph.D.
http://neuro.debian.net http://www.pymvpa.org http://www.fail2ban.org
Research Scientist,            Psychological and Brain Sciences Dept.
Dartmouth College, 419 Moore Hall, Hinman Box 6207, Hanover, NH 03755
Phone: +1 (603) 646-9834                       Fax: +1 (603) 646-1419
WWW:   http://www.linkedin.com/in/yarik