RFC: path display and path filtering features.

[Dmitry V. Levin]

On Mon, Mar 14, 2011 at 10:47:18AM -0500, Grant Edwards wrote:
> On Sat, Mar 12, 2011 at 03:48:08PM -0600, Grant Edwards wrote:
> 
> > Attached are my current diffs. I've merged recent changes from the
> > main git repository and addressed various comments.
> > 
> > The notable changes are addition of handling for 'select' syscalls,
> > 'poll' syscalls, and 'epoll_ctl'.
> 
> This set of diffs has had a little more cleanup done an code that
> checks paths residing in user-space was re-factored into a separate
> function.

Thanks.  I have two comments after skimming through the patch:

1. never use alloca(3) with arbitrary size coming from untrusted input:
it's unsafe, because alloca(3) has no means to indicate a memory
allocation failure;

2. getpath() sounds a bit generic, I suggest renaming it to something
more specific, e.g. getfdpath().


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