The Wayback Machine - https://web.archive.org/web/20010302183711/http://people.freebsd.org:80/~phk/

Poul-Henning Kamp

UNIX guru at large

<phk@FreeBSD.org> revised 2 july 1998

This is how I could appear to an observer under certain rather specific, but presently unspecified circumstances using a well-defined set of electromagnetic spectra in rather ill-defined illumination.

I has been suggested that this picture was taken in Argentina, but the only argument supporting that theory is that the picture could have been taken almost anywhere in the world, but recent studies seem to reveal a connection to an interesting German location.
Kodak would undoubtedly be proud to announce that that this picture was recorded on AGFA Film.

David Greenman took a couple of pictures at the USENIX annual conference in New Orleans, here is a picture taken in the very loungy foyer, and here is another one where I try to explain my timecounter stuff in a timeslot of 480 billion nanoseconds.

Seriously now,

Free stuff and all that...

Here are some messages which might answer some of your questions about various bits and bytes I've been mixed up with in the past:

HP48 I was quite active on the HP48 scene when it came out, now adays I hardly use it anymore. If you're doing something special and think I knew the answer, chances are pretty good that I didn't in the first place and even if I did, I have almost certainly forgot it by now, sorry. All the software I have released for the HP48 can be distributed which ever way you want.
scsi-ping Has taken a life of its own, I don't administrate any Solaris hosts these days, so I can't help you figure out what to do about your disktab. The most recent version I know about is here: ftp://ftp.cdf.toronto.edu/pub/jdd/scsiping
tcldb, tclcurses I have no idea if these are being actively used these days, or where to get recent copies if such exist.
Tcl & SNMP Although we tried hard to come up with a sanctioned & standard API for SNMP in Tcl, this effort was never quite finished. The SNMPv2 mentioned in the book by Marshall Rose came close to completion, but never quite made it, and has not been released in any shape worth using. I suggest you check out Scotty http://www.cs.utwente.nl/~schoenw/scotty/ If you are interested in working on an SNMP based network discover tool, give me a hint, I have some code (sub-app of tkined of course) which does a decent job but I have no time to polish and finish it.
MD5 based password scrambler Pick it up here if you want it: http://www.freebsd.org/cgi/cvsweb.cgi/src/lib/libcrypt/crypt.c and before you ask: Yes, cisco did pick it up and what you see in the enable secret 5 $1$mumbo$jumbo line is the same thing. I have been promised a beer if I pop around their offices some day.
phkmalloc You can pick it up here: http://www.freebsd.org/cgi/cvsweb.cgi/src/lib/libc/stdlib/malloc.c It should work on pretty much any OS, but you may want to set some of the parameters. Send me patches if you need to change it. I gave a presentation at the "Freenix" track of the USENIX conference in June 1998 in New Orleans about this piece of code. You can find the paper and most the slides here. (The missing slides are the colorful ones, they may come later.)

FreeBSD - UNIX the way I like it.

I have not yet been able to convince anybody to pay me to do only FreeBSD work, but I hope that some day, some of all the people and companies who benefit from FreeBSD will donate some money so I can dedicate my time to FreeBSD.

Current Projects:

Precision timekeeping.

I now have what is probably the best NTP lab this side of the Atlantic, I have access to three radios, DCF77, Loran-C and GPS and three OCXO frequency sources.

The outcome so far is that I have rewritten the timekeeping code in FreeBSD so it can use any current or future timestandard to the limit of what the hardware will allow, and I am currently trying to push that boundary as far back as I can.

Current status is that I can track my GPS receiver into a band less than 150 nsec wide around true UTC. This is an order of magnitude better than any other UNIX system I know of. My performance is probably even better than that, but I have not had much chance to validate it yet.

I gave a "Work In Progress" presentation about this at the Usenix annual conference in New Orleans in June 1998.

There are many an various reasons why this work is interesting, for instance, check this paper where I used my setup to measure the actual interrupt latency of a FreeBSD system.

I have a page on my own server about this stuff which I update as things develop: -> Submicrosecond UTC on a FreeBSD machine

Beerware, am I really serious ?

(I have included the text of the beerware license below so you can see what this is about.)

I have had it with lawyers trying to interpret freedom. If I write software which I intend to give away, I don't want to have to stick several pages of legalese on it to make sure nobody exploits it or any such meta-bable. If I have decided that I'll give away some code I've written, I going to give it away, period, none of this "unless it is worth a million to somebody" rubbish.
I think the GNU license is a joke, it fights the capitalism it so much is against with their own tools, and no company is ever going to risk any kind of proximity to so many so vague statements assembled in a license.
I think the BSD-lite license, which most of the FreeBSD people use now is pretty much OK, but I'm going to stick to my beerware license anyway.
And quite frankly, I think I have gotten much more out of my beerware license than most people have from their GNU or BSD licenses. Cisco use my password scrambler and netscape used my malloc implementation, and I know of a couple of other companies that use it too, but which for reasons I can understand doesn't want to disclose this to the public.
I do like to hear what people is using my code for though, but I have deliberately not made that a requirement, if people don't want me to know, they shouldn't have to tell me.
/*
* ----------------------------------------------------------------------------
* "THE BEER-WARE LICENSE" (Revision 42):
* <phk@FreeBSD.ORG> wrote this file. As long as you retain this notice you
* can do whatever you want with this stuff. If we meet some day, and you think
* this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
* ----------------------------------------------------------------------------
*
*/

Geography

I live in Denmark	... In a town called Slagelse

I have some more detailed maps you can get if you need to find your way here.

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PGP key

You can also find my PGP key in the FreeBSD Handbook on Walnut Creeks FreeBSD CD-roms. It can also be found on the PGP servers on the network.

If you find a key signed by me, you can trust that I am 100% convinced about the owners identity.

Type Bits/KeyID Date User ID
pub 1024/0358FCBD 1995/08/01 Poul-Henning Kamp <phk@FreeBSD.org>

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