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Re: "return" should not continue script execution, even if used inapprop


From: Chet Ramey
Subject: Re: "return" should not continue script execution, even if used inappropriately
Date: Mon, 7 Jan 2019 09:15:55 -0500
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:60.0) Gecko/20100101 Thunderbird/60.4.0

On 1/7/19 4:15 AM, Robert Elz wrote:
>     Date:        Sun, 6 Jan 2019 17:22:36 -0500
>     From:        Chet Ramey <address@hidden>
>     Message-ID:  <address@hidden>
> 
>   | Bash, in its default mode, considers errors from builtins non-fatal. When
>   | you run this in posix mode, which makes a distinction between "special" 
> and
>   | "regular" builtins, it should be a fatal error because POSIX says a non
>   | interactive shell needs to exit if a special builtin fails. It's a bug in
>   | bash if it doesn't do that in posix mode.
> 
> But return is not required to fail if it does not appear in a function or . 
> script, what POSIX says is ...

Sure. But if it returns non-zero in default mode, it should return non-zero
in posix mode. And if it returns non-zero in posix mode, the shell should
exit, because it's a special builtin.

-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU    address@hidden    http://tiswww.cwru.edu/~chet/



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