On Mon, Oct 31, 2022 at 11:24:06AM -0700, Roger Marquis wrote:
> scott wrote:
> >Historically, '[[' was implemented directly by the shell, while '['
> >was implemented using fork(), exec("["). There is clearly a benefit
> >to eliminating process creation.
>
> Isn't that an implementation detail that can be easily changed? If so
> not sure it'd be relevant to the compatibility or syntax issues with '[['.
The current standard allows the shell to treat any command as a
builtin and execute it as such, so long as it preserves the semantics.
However, another benefit of the '[[' builtin is that it does not
do word splitting or pattern expansion.
scott
