bug#8186: dired-font-lock-keywords should warn about SUID files too!

[Drew Adams]

> > I checked the directory /run and there is:
> >   drwxrwsr-x  3 postgres postgres   120 postgresql
> > where 'w' in group is rightfully highlighted with the 'dired-perm-write' 
> > face,
> > but 's' in the same group is not highlighted with the 'dired-set-id' face.
> > Is this intentional?
> 
> No...  Do we need to add combinatorial versions of all the regexps to
> dired-font-lock-keywords or is there a better way?

FWIW -

If by that you mean highlight the different privileges
for each possible role (other, group, user), then
`dired+.el' has done that since sometime in the 90s.
(I suggested it for Emacs back then.)

Not a big deal:

(list (concat dired-re-maybe-mark dired-re-inode-size
              "[-dl]........\\([lsStT]\\)")  ; o misc
      '(1 diredp-other-priv))
(list (concat dired-re-maybe-mark dired-re-inode-size
              "[-dl].....\\([lsStT]\\)...")  ; g misc
      '(1 diredp-other-priv))
(list (concat dired-re-maybe-mark dired-re-inode-size
              "[-dl]..\\([lsStT]\\)...")     ; u misc
      '(1 diredp-other-priv))
(list (concat dired-re-maybe-mark dired-re-inode-size
              "\\([bcsmpS]\\)")              ; (rare)
      '(1 diredp-rare-priv keep))

https://www.emacswiki.org/emacs/download/dired%2b.el