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Re: 'eval' exit behaviour in posix mode


From: Chet Ramey
Subject: Re: 'eval' exit behaviour in posix mode
Date: Wed, 26 Dec 2018 11:26:02 -0500
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:52.0) Gecko/20100101 Thunderbird/52.9.1

On 12/23/18 7:42 PM, Martijn Dekker wrote:
> Op 14-12-18 om 14:29 schreef Chet Ramey:
>> On 12/14/18 6:46 AM, Martijn Dekker wrote:
>>> In current git, 'bash -o posix' no longer exits the shell on a syntax error
>>> in the argument to the special builtin 'eval'. Bash 4.2-4.4 exit as POSIX
>>> specifies.
>>
>> Well, not quite. It's the specific case of an unexpected end of file. ksh93
>> doesn't exit, either, but it's probably the right thing to do, and the
>> right thing for backwards compatibility.
> 
> But now it exits on an unexpected EOF (or other syntax error) in 'command
> eval' as well, which it shouldn't.

Yes, that's true in posix mode. Interestingly, no other shell I tested
(quickly) honors the special status of the command builtin here.

Chet

-- 
``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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