Re: [PATCH] test-lib: check Bash version for '-x' without using shell arrays

From: SZEDER Gábor <szeder.dev@gmail.com>
Date: Jan 3, 2019, 11:36 UTC
Message-ID: <20190103113659.GA4673@szeder.dev>
In-Reply-To: <20190101231949.8184-1-szeder.dev@gmail.com>

On Wed, Jan 02, 2019 at 12:19:49AM +0100, SZEDER Gábor wrote:

Show 6 quoted lines

> To my understanding both shells are right and conform to POSIX,
> because the standard allows both behavior by stating the following
> under '2.8.1 Consequences of Shell Errors':
> 
>   "An expansion error is one that occurs when the shell expansions
>   define in wordexp are carried out (for example, "${x!y}", because

That "define" above always stops my (non-native) English parser for a moment or two... shouldn't it be s/define/defined/ ?

It's not a copy-paste error, POSIX does indeed write "define" there, see:

http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_08_01

(First paragraph below the table and the Notes.)

>   '!' is not a valid operator); an implementation may treat these as
>   syntax errors if it is able to detect them during tokenization,
>   rather than during expansion."
>