Re: That '[' file in /usr/bin

[H. Peter Anvin]

The kernel will never pass that; that will fail at the exec side.

Mike Frysinger <address@hidden> wrote:

>On Sunday 03 March 2013 14:03:24 H. Peter Anvin wrote:
>> On 03/03/2013 02:53 AM, Pádraig Brady wrote:
>> >> personally, i find it a bit ironic that a lot of GNU apps
>(including
>> >> coreutils) simply abort() themselves when argv[0]==NULL
>considering the
>> >> project's hard line position about not relying on argv[0] for
>behavior.
>> > 
>> > This issue was mentioned here:
>> >
>http://lists.gnu.org/archive/html/bug-coreutils/2009-11/msg00215.html
>> > 
>> > The problem with avoiding the aborts is that NULL is only
>> > one of many invalid values for argv[0]
>> 
>> Come again?
>> 
>> You can't seriously say that checking for a null pointer or an
>invalid
>> string (for whatever definition of "valid" you happen to have) is
>hard.
>
>he's saying that, why special case NULL if we think this scenario is
>invalid.  
>a pointer of argv[0] = 1 will crash just as hard.
>-mike

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