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Re: cannot declare local variables if they're readonly


From: Chet Ramey
Subject: Re: cannot declare local variables if they're readonly
Date: Thu, 23 Jul 2015 09:05:14 -0400
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:31.0) Gecko/20100101 Thunderbird/31.7.0

On 7/22/15 7:12 PM, isabella parakiss wrote:
> From variables.c
> 
>                                        The test against old_var's context
>      level is to disallow local copies of readonly global variables (since I
>      believe that this could be a security hole).
> 
> Can you please explain how that can be a security hole?

http://lists.gnu.org/archive/html/bug-bash/2011-02/msg00194.html
http://lists.gnu.org/archive/html/bug-bash/2012-04/msg00099.html

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



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