How to get filename of an open file descriptor

[Max Laier]

On Wednesday 14 November 2007, Robert Watson wrote:
> On Tue, 13 Nov 2007, Yuri wrote:
> > Thank you for letting me know about this new feature procstat.
> >
> > But is there any workaround in 6.3? I need to port one package that
> > needs to lookup file names by FDs to the current FreeBSD and need
> > some solution now.

I'm not completely certain what you are looking for, but doesn't lsof do 
just that?

> If the port uses a script to extract the data, a tool like lsof may do
> the trick.  However, I'm not sure there are any native APIs to query
> that data "as shipped" in 6.3.  Once I've had some reasonable feedback
> on procstat(1), I'll merge it into CVS and start it on the MFC route,
> but 6.3 is almost certainly too soon for it to ship as part of that
> release.  I don't know if there will be a 6.4 or not, but I would
> anticipate procstat(1) appearing in 7.1, and 6-STABLE if there are
> requests.  procstat(1) mostly relies on existing sysctls, and adds two
> new ones for the purposes of exporting the file descriptor and VM
> information only, so it is a fairly straight forward MFC.
>
> Robert N M Watson
> Computer Laboratory
> University of Cambridge
>
> > Yuri
> >
> > Quoting Robert Watson <rwatson at FreeBSD.org>:
> >> On Mon, 12 Nov 2007, Yuri wrote:
> >>> Thank you for your response.
> >>>
> >>> I attempted to compile procstat but procstat.h seems to be missing
> >>> in
> >>
> >> tgz.
> >>
> >> Yuri,
> >>
> >> Indeed -- looks like I forgot to p4 add on my development box.  I've
> >> updated
> >>
> >> the tarball to now include procstat.h.  If there are any other
> >> problems, do
> >>
> >> let me know.
> >>
> >> Robert N M Watson
> >> Computer Laboratory
> >> University of Cambridge
>
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