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Diffstat (limited to 'usr.sbin/xntpd/hints/aux')
| -rw-r--r-- | usr.sbin/xntpd/hints/aux | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/usr.sbin/xntpd/hints/aux b/usr.sbin/xntpd/hints/aux new file mode 100644 index 0000000..aa7ccbb --- /dev/null +++ b/usr.sbin/xntpd/hints/aux @@ -0,0 +1,159 @@ +Last revision: 09-Aug-1993 + +Included in this distribution of XNTP V3 is a configuration file suitable +for use under Apple's A/UX Version 3.0.x While it may work with +other versions, it has not been tested. To make the executables follow +the steps outlined below. + +*** NOTE: You must have gcc installed to successfully compile the current +distribution; the native cc supplied with A/UX will NOT correctly compile +this source. See the FAQ in comp.unix.aux for places to obtain gcc from +and how to install it. + +Now, you need to create the makefiles: + + % make refconf + +First of all, you need to edit Config.local to make sure that BINDIR is +correct for where you wish the programs to be "installed". The default +(and what I use) is /usr/local/etc. Make sure that DEFS_LOCAL and +CLOCKDEFS are commented out! + + +After this is done (you should be told that your system is A/UX 3), make +xntpd (the options to 'gcc' are held in compilers/aux3.gcc): + + % make + +I do not normally use the `make install' option and so have not verified its +compatibility with A/UX. Rather, I pull out each of the executables and +place them in the locally appropriate locations. + +At this point you need to set things up so that 'xntpd' is started upon +boot-up. You can do this in 1 of 2 ways: either add entries in /etc/inittab +or create and use an /etc/rc.local file. + +By default, A/UX doesn't have one, so you'll need to add the following to +/etc/inittab: + + net6:2:wait:/etc/syslogd # set to "wait" to run a syslog daemon ++ jmj0:2:wait:/etc/rc.local 1>/dev/syscon 2>&1 # Local stuff + dbg2::wait:/etc/telinit v # turn off init's verbose mode + +Now, the look of /etc/rc.local is as follows: + + #!/bin/sh + : + : rc.local + : + # @(#)Copyright Apple Computer 1987 Version 1.17 of rc.sh on 91/11/08 15:56:21 (ATT 1.12) + + + # Push line discipline/set the device so it will print + /etc/line_sane 1 + echo " " + echo "Entering rc.local..." + + set `/bin/who -r` + if [ "$7" = 2 ] + then + /bin/echo " now setting the time..." + /usr/local/etc/ntpdate -s -b <host.domain> + sleep 5 + # + # start up xntpd if we want + # + if [ -f /etc/ntp.conf ] + then + /bin/echo " setting tick and tickadj..." + /usr/local/etc/tickadj -t 16672 -a 54 + sleep 5 + /bin/echo " starting xntpd..." + /usr/local/etc/xntpd <&- > /dev/null 2>&1 + sleep 5 + fi + # + fi + + echo "Leaving rc.local..." + +There are a few things to notice about the above: + + o When run, 'ntpdate' forces your clock to the time returned by the + host(s) specified by <host.domain> (you'll need to replace this + be the IP address(es) of your timehosts. This is good since it gets + things close to start off with. + + o 'tickadj' is also called. This does two things: changes the + default value of 'tick' (which the the amount of time, in ms, that + is added to the clock every 1/60 seconds) and changes the value + of 'tickadj' which the the amount that is added or subtracted + from 'tickadj' when adjtime() is called. + + Now Mac clocks are pretty bad and tend to be slow. Sooo, instead of + having A/UX add the default of 16666ms every 1/60th of a second, + you want it to add more so that it keeps better time. The above + value works for me but your "best" value may be different and will + likely require some fooling around to find the best value. + + A/UX's default value of 'tickadj' is 1666 which is too big for + 'xntpd'... so it also needs to be adjusted. + + +Finally, before A/UX and 'xntpd' will work happily together, you need to +patch the kernel. This is due to the fact that A/UX attempts to keep the +UNIX-software clock and the Mac-hardware clock in sync. Now both of these +are too good. Also, 'xntpd' will be attempting to adjust the software +clock as well, so having A/UX muck around with it is asking for headaches. +What you therefore need to do is tell the kernel _not_ to sync the s/w clock +with the h/w one. This is done using 'adb'. The following is a shell script +that will do the patch for you: + + #! /bin/sh + adb -w /unix <<! + init_time_fix_timeout?4i + init_time_fix_timeout?w 0x4e75 + init_time_fix_timeout?4i + $q + ! + +This must be done _every_ time you create a new kernel (via newconfig or +newunix) or else 'xntpd' will go crazy. + +John Dundas was the original porter of xntpd and a lot of the additions +and A/UX-ports are from him. I got involved when I wanted to run 'xntpd' +on jagubox. It was also around this time that the base-patchlevel of +'xntpd' changed relatively significantly so John may not be up on this +version (called the "jones" version). + +The original kernel patch (which patched 'time_fix_timeout') was from +Richard Todd. I suggest patching 'init_time_fix_timeout' which prevents +'time_fix_timeout' from even being called. + +TECHNICAL NOTES: + + o As configured (see machines/aux3), 'xntpd' will log messages via syslogd + using the LOC_LOCAL1 facility. I would suggest the following in + /etc/syslog.conf: + + local1.notice /usr/adm/ntpd-syslog + + o As mentioned above, the clocks on A/UX and Macs are kinda bad. Not + only that, but logging in and out of the MacOS mode as well as + extensive floppy use causes A/UX to drop and lose clock interupts + (these are sent every 1/60th of a second). So, if you do these + activities a lot, you find out that you lose about 300ms of time + (i.e., you become 300ms slow). 'xntpd' default way of handling this + is to called 'settimeofday()' and step the clock to the correct + time. I prefer having 'xntpd' slew the clock back into line by + making gradual adjustments to the clock over a coupla minutes + or so. It's for this reason that SLEWALWAYS is defined in + include/ntp_machine.h for SYS_AUX3. + +Good luck! If you have problems under A/UX feel free to contact me (e-mail +is preferred). +-- + Jim Jagielski | "That is no ordinary rabbit... 'tis the + jim@jagubox.gsfc.nasa.gov | most foul, cruel and bad-tempered + NASA/GSFC, Code 734.4 | rodent you ever set eyes on" + Greenbelt, MD 20771 | Tim the Enchanter |
