Re: revisiting history-file rewriting

[Peter Stephenson <pws@csr.com>]

Wayne Davison wrote:
> On Fri, Mar 18, 2005 at 10:49:08AM +0000, Peter Stephenson wrote:
> > How would this change the result when multiple shells exit at once?
> > I'm not entirely clear how the locking affects the fact that multiple
> > shells want to rewrite the file in this case.
> 
> It doesn't change that behavior except to make it safer -- if zsh is
> forcefully killed it might be in the middle of writing out a new copy of
> the history file instead of a truncated version of the real history
> file.
> 
> Note also that for anyone using one of the history-appending options
> that I've already eliminated the multi-shell locking contention at
> system shutdown time because zsh no longer tries to rewrite the history
> file on a kill signal (and doesn't need to touch the history file at all
> if it has no history data left to append).

This sounds fine.

-- 
Peter Stephenson <pws@csr.com>                  Software Engineer
CSR PLC, Churchill House, Cambridge Business Park, Cowley Road
Cambridge, CB4 0WZ, UK                          Tel: +44 (0)1223 692070


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