[gentoo-user] Re: Writing more complicated scripts than I'm used too.

[Grant Edwards <grant.b.edwards@gmail.com>]

On 2025-07-02, Eli Schwartz <eschwartz@gentoo.org> wrote:

> Yes, in general [[ is better than [
>
> The practical difference is that it is parsed as a keyword, not as an
> ordinary command, hence it knows what is inside of it without whitespace
> handling. i.e.

>>  [And it's even support
>> by busybox's ash shell.]
>
>
>
> Beware that busybox ash supports [[ "partially".
>
> From the busybox source code comments:

Ah, thanks for pointing that out.  I apparently haven't run into those
incompibilities yet, but I'll have to keep them in mind.  When writing
scripts of an embedded system, I tend to write/test scripts in bash,
then test them with ash on the target system.  What I _should_ do is
install busybox on my development host and do the development using
busybox ash as well.

--
Grant