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Re: Reproducible SIGSEGV in bash 4.2 caused by alias.
From: |
Piotr Grzybowski |
Subject: |
Re: Reproducible SIGSEGV in bash 4.2 caused by alias. |
Date: |
Fri, 11 Oct 2013 07:04:25 +0200 |
On 11 Oct 2013, at 00:22, Eric Blake wrote:
>
> Why impose an arbitrary recursion limit at all? [..]
> One way to do this is to link to the GNU libsigsegv library [..]
> (although gracefully recovering from overflow is a MUCH harder task [..]).
I personally do not mind linking with libsigsegv, if you can ensure that it
will be present on all platforms bash runs, and if you provide some other mean
to avoid going into infinite recursion (like #ifndef HAVE_LIB_SIGSEGV /*use
hardcoded recursion limit*/ #endif) in case you do not have the lib.
If you prefer, I can, according to the gnu philosophers (as you say), add a
limit that will equal with the amount of function frames that can fit available
memory :) to let you use the full power and explore the mysteries of infinite
recursions :)
Anyway, the patch was just a thought; I think that it is a good practice to
avoid this kind of situations, especially when you are implementing a command
that can define other commands, including itself, i.e., can be recursive in
itself.
cheers,
pg