Re: Quick question: mv !(file) !$

[Yang Zhang]

Chet Ramey wrote:
> Yang Zhang wrote:
> > Hi, why doesn't the second command work?  (Trying to move all files into
> > a newly created directory.)
> >
> > $ mkdir dhclient
> > $ mv !(dhclient) !$
> > bash: !: event not found
>
> It doesn't work because enabling the `extglob' option doesn't cause bash
> to tell the history library to not attempt history expansion when it sees
> the history expansion character followed by a `('.  This will be fixed in
> bash-4.0 or soon after.
>
> Chet

So it's failing on the first bang?  But there is no problem once I 
replace !$ with 'dhclient' - usually extglob seems to work fine with the 
suppression of history expansion.  Or does the presence of !$ somehow 
trigger history expansion (normally not run) which then attempts to 
history-expand everything?
--
Yang Zhang
http://www.mit.edu/~y_z/