On 9/11/15 10:10 AM, Konstantin Khlebnikov wrote:
> On Fri, Sep 11, 2015 at 3:52 PM, Chet Ramey <[email protected]> wrote:
>> On 9/11/15 2:19 AM, Konstantin Khlebnikov wrote:
>>> $ ./bash -c ":(){ : $@$@;};: :"
>>> Segmentation fault
>>
>> This is not a memory allocation problem. You have defined an infinitely
>> recursive function that, when executed, eventually exceeds your stack size
>> resource limit. When that happens, the kernel sends a SIGSEGV.
>
> Yep. But this not happens if command runs in interactive mode.
> Bash uses default stack (with MAP_GROWSDOWN) in interactive mode
> and fixed size stack for "-c" ?
Bash doesn't do anything different. It may be that your system sets
different resource limits for interactive shells and non-interactive ones.
Either way, it will eventually fail.
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, ITS, CWRU [email protected] http://cnswww.cns.cwru.edu/~chet/
