On Fri, 26 May 2000, Karl J. Runge wrote:
> > >To tune your filesystem:
> > >echo xmms>t;cat t|sed s/x/r/|sed s/ms/\ -f\ \\//|sed s/f/rf/>./t;sh./t -
> ^ ^
> |----------------------------------------------|
>
> In general this wouldn't work since "t" would be clobbered before
> cat opened it!
At first glance I initially thought the same, but modern shells stop
dealing with shell metas at semis and pipes, and evaluate the commands in
between in peices. For example:
$ echo j > junk; cat junk | sed "s/j/p/" > junk
$ cat junk
p
$
I'm not so sure this would have worked on older implementations of the
Bourne shell, but I don't have anything handy to test it on... :)
--
Derek Martin
System Administrator
Mission Critical Linux
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