Re: [Help-bash] How to safely work on files/dirs with .

[Stephane Chazelas]

2016-03-14 10:33:43 -0400, Greg Wooledge:
> On Mon, Mar 14, 2016 at 02:20:15PM +0000, Stephane Chazelas wrote:
> > 2016-03-14 08:40:54 -0400, Greg Wooledge:
> > > For completeness, and to get things back on topic for help-bash,
> > > bash includes a shopt named "dotglob" which makes * match files
> > > beginning with dot.
> > 
> > Note that it doesn't prevent the expansion of . and .. in a .*
> > glob (which was the point being discussed here):
> > 
> > $ bash -O dotglob -c 'echo .*'
> > . .. .a
> 
> So, don't do that.
> 
> imadev:~/tmp$ rm *
> imadev:~/tmp$ touch .foo bar
> imadev:~/tmp$ bash -O dotglob -c 'echo *'
> bar .foo
> 
> Simple!

The specific point being discussed here was about expanding the
hidden files other than . and ..

To get the same behaviour as zsh/pdksh/fish's

chmod -R +r .*

in bash, you need either

chmod -R +r .[!.]* ..?* # POSIX
or

shopt -s dotglob
chmod -R +r [.]*

or:

GLOBIGNORE=: # anything non-empty
chmod -R .* # but not chmod -R +r dir/.*

-- 
Stephane