Foppers,

I'm beginning to realise what a mighty cultural gulf I'm talking across. 
As an aid to understanding, I have just tried the following on my linux 
system. (Note that we are talking binaries here.)

$ cd /usr/bin
$ ls | (xargs ident 2>/dev/null) | less

The results are patchy. For most files you see a results like

<
artsmessage:

artsplay:

artsrec:

 >
i.e. No keywords. Then you get things like

<
cancel:
$Id: lprm.c,v 1.19 2002/03/06 17:02:54 papowell Exp $

 >
and at the other end of the scale

<
mailq:
$Id: main.c,v 8.485.4.65 2001/07/20 00:53:00 gshapiro Exp $
$Id: sendmail.h,v 8.517.4.70 2001/08/14 23:08:12 ca Exp $
$Id: alias.c,v 8.142.4.11 2001/05/03 17:24:01 gshapiro Exp $
$Id: arpadate.c,v 8.23.20.2 2001/05/07 22:07:26 gshapiro Exp $
$Id: bf_portable.c,v 8.25.4.6 2001/05/03 17:24:01 gshapiro Exp $
$Id: clock.c,v 8.52.18.18 2001/08/14 16:07:04 ca Exp $
$Id: collect.c,v 8.136.4.22 2001/06/07 21:01:02 ca Exp $
$Id: conf.c,v 8.646.2.2.2.87 2001/07/20 23:56:52 gshapiro Exp $
$OrigId: getloadavg.c,v 1.16 1991/06/21 12:51:15 paul Exp $
$Id: control.c,v 8.44.14.20 2001/05/03 17:24:03 gshapiro Exp $
$Id: convtime.c,v 8.25 1999/06/16 21:11:26 ca Exp $
$Id: daemon.c,v 8.401.4.68 2001/07/20 18:45:58 gshapiro Exp $
$Id: deliver.c,v 8.600.2.1.2.86 2001/07/20 21:52:55 gshapiro Exp $
$Id: domain.c,v 8.114.6.1.2.8 2001/02/12 21:40:19 gshapiro Exp $
$Id: envelope.c,v 8.180.14.10 2001/05/03 17:24:06 gshapiro Exp $
$Id: err.c,v 8.120.4.5 2001/08/17 22:09:40 ca Exp $
$Id: headers.c,v 8.203.4.13 2001/05/03 17:24:06 gshapiro Exp $
$Id: macro.c,v 8.40.16.9 2001/02/22 01:16:55 gshapiro Exp $
$Id: map.c,v 8.414.4.55 2001/08/15 22:08:58 gshapiro Exp $
$Id: mci.c,v 8.133.10.8 2001/05/03 17:24:10 gshapiro Exp $
$Id: milter.c,v 8.50.4.53 2001/08/15 02:01:03 ca Exp $
$Id: mime.c,v 8.94.16.3 2000/10/09 02:46:10 gshapiro Exp $
$Id: parseaddr.c,v 8.234.4.13 2001/08/14 23:08:13 ca Exp $
$Id: queue.c,v 8.343.4.62 2001/07/20 00:53:01 gshapiro Exp $
$Id: readcf.c,v 8.382.4.43 2001/08/14 23:08:13 ca Exp $
$Id: recipient.c,v 8.231.14.11 2001/05/03 17:24:14 gshapiro Exp $
$Id: savemail.c,v 8.212.4.13 2001/05/03 17:24:15 gshapiro Exp $
$Id: sfsasl.c,v 8.17.4.15 2001/07/11 17:37:07 gshapiro Exp $
$Id: shmticklib.c,v 8.6 2000/02/26 01:32:27 gshapiro Exp $
$Id: srvrsmtp.c,v 8.471.2.2.2.78 2001/06/26 18:52:21 gshapiro Exp $
$Id: stab.c,v 8.40.16.7 2001/05/07 22:06:41 gshapiro Exp $
$Id: stats.c,v 8.36.14.5 2001/02/14 04:07:30 gshapiro Exp $
$Id: sysexits.c,v 8.25 1999/09/23 19:59:24 ca Exp $
$Id: timers.c,v 8.13.16.1 2000/10/09 01:06:45 gshapiro Exp $
$Id: trace.c,v 8.20.22.4 2001/08/15 13:05:43 ca Exp $
$Id: udb.c,v 8.111.16.2 2001/05/03 17:24:17 gshapiro Exp $
$Id: usersmtp.c,v 8.245.4.34 2001/06/26 21:55:23 gshapiro Exp $
$Id: util.c,v 8.225.2.1.2.26 2001/06/01 08:23:25 gshapiro Exp $
$Id: version.c,v 8.43.4.39 2001/08/20 14:45:34 gshapiro Exp $
$Id: debug.c,v 8.2 1999/07/26 04:04:09 gshapiro Exp $
$Id: safefile.c,v 8.81.4.10 2001/07/20 04:19:36 gshapiro Exp $
$Id: snprintf.c,v 8.27.16.4 2001/07/20 04:19:37 gshapiro Exp $
$Id: strl.c,v 8.5.14.2 2000/09/17 17:04:24 gshapiro Exp $

 >

rcs, as one might expect, looks like
<
rcs:
$Id: rcsbase.h,v 5.20 1995/06/16 06:19:24 eggert Exp $
$Id: rcs.c,v 5.21 1995/06/16 06:19:24 eggert Exp $
$Id: rcslex.c,v 5.19 1995/06/16 06:19:24 eggert Exp $
$Id: rcssyn.c,v 5.15 1995/06/16 06:19:24 eggert Exp $
$Id: rcsrev.c,v 5.10 1995/06/16 06:19:24 eggert Exp $
$Id: rcsutil.c,v 5.20 1995/06/16 06:19:24 eggert Exp $
$Id: rcsgen.c,v 5.16 1995/06/16 06:19:24 eggert Exp $
$Id: rcsedit.c,v 5.19 1995/06/16 06:19:24 eggert Exp $
$Id: rcskeys.c,v 5.4 1995/06/16 06:19:24 eggert Exp $
$Id: rcsmap.c,v 5.3 1995/06/16 06:19:24 eggert Exp $
$Id: rcsfnms.c,v 5.16 1995/06/16 06:19:24 eggert Exp $
$Id: rcskeep.c,v 5.10 1995/06/16 06:19:24 eggert Exp $
$Id: maketime.c,v 5.11 1995/06/16 06:19:24 eggert Exp $
$Id: partime.c,v 5.13 1995/06/16 06:19:24 eggert Exp $
$Id: rcstime.c,v 1.4 1995/06/16 06:19:24 eggert Exp $

 >

On the other hand, there's
<
$ ident /usr/sbin/httpd
/usr/sbin/httpd:
ident warning: no id keywords in /usr/sbin/httpd
 >

Peter


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