Re: Q: bash parameter expansion

[Dmitry V. Levin]

On Mon, Apr 21, 2008 at 10:06:10AM +0200, Andreas Schwab wrote:
> Dmitry V. Levin writes:
> 
> > I wonder whether such difference in parameter expansion is valid:
> >
> > $ env -i sh -c 'fun() { echo "[${*#foo }]"; }; fun foo bar'
> > [foo bar]
> > $ env -i sh -c 'fun() { echo "[${*#foo}]"; }; fun foo bar'
> > [ bar]
> 
> Works as documented:
> 
> `${PARAMETER#WORD}'
> `${PARAMETER##WORD}'
>      The WORD is expanded to produce a pattern just as in filename
>      expansion (*note Filename Expansion::).  If the pattern matches
>      the beginning of the expanded value of PARAMETER, then the result
>      of the expansion is the expanded value of PARAMETER with the
>      shortest matching pattern (the `#' case) or the longest matching
>      pattern (the `##' case) deleted.  If PARAMETER is `@' or `*', the
>                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^
>      pattern removal operation is applied to each positional parameter
>                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>      in turn, and the expansion is the resultant list.

Ouch, one more documented incompatibility between bash and dash.


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