On Fri, 11 Sep 1998, Paul Slootman wrote:
> I don't like this type of thing, as there is a race condition between
> replacing the old config with the new. If exim happens to want to read
> the file just when it's being replaced, Bad Things might happen.
>
> An alternative would be an #include type of mechanism for the config
> file. I just had a quick look, but couldn't find anything like that.
> The config file could then include a (one-liner) file that either says
> "queue_whatever" or not, depending on the connection state.
... but then you have a race condition on the included file, don't you?
Actually, it is my understanding of Unix that you don't have a race
condition, because the file is replaced by renaming (using mv rather
than cp). Exim will read either the old file or the new file.
--
Philip Hazel University of Cambridge Computing Service,
ph10@??? Cambridge, England. Phone: +44 1223 334714.
--
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