RFC: path display and path filtering features.

[Dmitry V. Levin]

On Fri, Feb 18, 2011 at 05:03:38PM +0000, Grant Edwards wrote:
[...]
> Do we still need to do something to deal with the symlink vs.
> canonical question for syscalls like stat()?

We could canonicalize absolute pathname arguments.
We even could canonicalize relative pathname arguments using
/proc/$pid/cwd.
But I'm not sure now whether we really need this or not.

> Should we try to handle syscalls like faccessat() where the file is
> specified by a (fd,relative-path) tuple?

We could implement a simple check, e.g. concatenate getpath(fd) with
relative-path (or if fd == AT_FDCWD, readlink(/proc/$pid/cwd) with
relative-path), and try to match this concatenation.

But whether we need to match against canonicalized concatenation,
I cannot say now.

BTW, print_dirfd() should use printfd().


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