| Summary: | chrony contribution; patch to use config option for longterm RTC gain/loss adjustment across reboots | ||
|---|---|---|---|
| Product: | Gentoo Linux | Reporter: | Rob Davies <Rob_Davies> |
| Component: | Current packages | Assignee: | Wout Mertens (RETIRED) <wmertens> |
| Status: | RESOLVED FIXED | ||
| Severity: | enhancement | ||
| Priority: | High | ||
| Version: | 1.4 | ||
| Hardware: | All | ||
| OS: | Linux | ||
| URL: | http://homepage.ntlworld.com/rob_davies/chronyd.patch | ||
| Whiteboard: | |||
| Package list: | Runtime testing required: | --- | |
| Attachments: | example config file, showing directives used by patch | ||
Created attachment 18351 [details]
example config file, showing directives used by patch
Many thanks for this; applied. |
A main feature of chrony, above xntp and an advantage, is support for periodic connection. chronyd can use server history, and manage the RTC to time more accurately across reboots, with only periodic connection, or computer shutdown, by averaging the gain/loss of the RTC. This patch, aims to tune the chronyd startup options, where it makes sense, depending on the configuraton file options. To /etc/{conf,init}.d/chronyd adds setting of -r if 'dumponexit' and -s arguments if 'rtcfile' is specified in the configuration. A check is also made that /dev/rtc is a character special device, devfs won't create it if enhanced RTC support is not compiled into kernel. It is based on a sys V init, package for chrony I maintained under SuSE-7.1 to 8.2. I have tried to comment clearly to aid the Gentoo end-user. Please advise if submission would be better made in different form. I cd-ed /etc and used 'rcsdiff -r1.1 -u' to generate the patch file. I have tested this with 1.19.99.2 and 1.19 under Gentoo, and used the '-s -r' options with chrony since version 1.15 or so under other distro's. --- conf.d/chronyd 2003/09/02 12:02:40 1.1 +++ conf.d/chronyd 2003/09/06 11:17:11 @@ -1,5 +1,21 @@ # Copyright 1999-2003 Gentoo Technologies, Inc. # Distributed under the terms of the GNU General Public License v2 -# $Header: /etc/conf.d/RCS/chronyd,v 1.1 2003/09/02 12:02:40 root Exp $ +# $Header: /etc/conf.d/RCS/chronyd,v 1.3 2003/09/06 11:16:32 rob Exp $ CFGFILE=/etc/chrony/chrony.conf + +# +# Configuration dependant options : +# -s - Set system time from RTC if rtcfile directive present +# -r - Reload sample histories if dumponexit directive present +# +# The combination of "-s -r" allows chronyd to perform long term averaging of +# the gain or loss rate across system reboots and shutdowns. +# +ARGS="" +# +# devfs creates the device for RTC if it's compiled into kernel +test -c /dev/rtc && { + grep -q '^rtcfile' $CFGFILE && ARGS="$ARGS -s" +} +grep -q '^dumponexit$' $CFGFILE && ARGS="$ARGS -r" --- init.d/chronyd 2003/09/02 11:41:07 1.1 +++ init.d/chronyd 2003/09/06 11:21:06 @@ -1,7 +1,12 @@ #!/sbin/runscript # Copyright 1999-2003 Gentoo Technologies, Inc. # Distributed under the terms of the GNU General Public License v2 -# $Header: /etc/init.d/RCS/chronyd,v 1.1 2003/09/02 11:41:07 root Exp $ +# $Header: /etc/init.d/RCS/chronyd,v 1.2 2003/09/06 11:19:22 root Exp $ + + +# +# $ARGS set in /etc/conf.d/chronyd +# depend() { need net @@ -41,7 +46,7 @@ start-stop-daemon --start --quiet \ --exec /usr/sbin/chronyd \ --pidfile $PIDFILE \ - -- -f $CFGFILE + -- -f $CFGFILE $ARGS eend $? "Failed to start chronyd" }