Re: Syscall implementation could lead to whether or not a file exists

[Arjan van de Ven <arjanv () redhat com>]

On Wed, 2003-04-02 at 21:19, Andrew Griffiths wrote:
> Product: Linux and various other kernels
> Tested:
>       - RedHat kernel 2.4.18-26.7.x (second latest ;))
>       - RedHat kernel 2.4.18-27.7.x
>       - Debian 3.0 box
>       - FreeBSD 4.4
>
> Description:
>
>       Due to the implementation of various system calls,  it becomes
>       possible to test whether or not a file exists in a directory
>       that is unreadable.

.. by calling lstat(2).  Ability to do lookup is controlled by _exec_
permissions, not read ones.

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