Need Simple Way To Determine If File Is Executable

[Sebastian 'lunar' Wiesner]

Fredrik Lundh <fredrik at pythonware.com> schrieb

> Sebastian 'lunar' Wiesner wrote:
> 
>> No, they aren't! Try this:
> 
> you're confusing the shell's "is this file executable" check with the
> loader's "can I execute this file" check:
>
> $ export PATH=.:$PATH
> $ dd if=/dev/zero of=ls count=1
> 1+0 records in
> 1+0 records out
> $ ls -l ls
> -rw-rw-r--  1 slab slab 512 Dec 20 03:33 ls
> $ chmod a+x ls
> $ ls
> -bash: ./ls: cannot execute binary file

???
Am I blind or is there really no difference between you shell example an
mine?
As far as I can see, you are doing exactly the same thing as I did...
So what are trying to proof?

Sebastian

-- 
Freedom is always the freedom of dissenters.
        (Rosa Luxemburg)