Gilles Espinasse wrote:
> It has been reported on ipcop-devel list that cp foo{,.bak} contruction is
> broken on Ubuntu-8.04
>
> This was on expect instructions
>
> cp configure{,.bak}
> cp: missing destination file operand after `configure{,.bak}'
> Try `cp --help' for more information.
>
> Could it not be prefered to build sed at the beginning, so it is always safe
> to use sed -i?
> That's what DYI do and what have been done on ipcop-1.4.
> Anyway splitting in two instructions (one cp, one sed) could be the most
> portable way.
>
> This construction is actually used on expect, gcc pass2, gzip, perl (in
> perl, with mv, not cp)
Why is it broken? Is it because the shell being used is not bash? It is the
shell that expands the {,.bak} construct and LFS now recommends using bash just
to avoid potential problems like this.
-- Bruce
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