From bf0cc2dac43bde5249ad2a918006e560382f86d0 Mon Sep 17 00:00:00 2001
From: Roy Marples <roy@marples.name>
Date: Tue, 23 Oct 2007 20:00:08 +0000
Subject: [PATCH] clock init script now handles /etc/adjtime correctly.
 CLOCK_ADJTIME hinted that it could change the location of /etc/adjtime. This
 is not the case.

---
 ChangeLog          |  6 ++++++
 conf.d.Linux/clock | 17 +++++------------
 init.d.Linux/clock | 44 +++++++++++++++++++++++---------------------
 3 files changed, 34 insertions(+), 33 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index b8369e6c..6015183b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,6 +1,12 @@
 # ChangeLog for Gentoo System Intialization ("rc") scripts
 # Copyright 1999-2007 Gentoo Foundation; Distributed under the GPLv2
 
+  23 Oct 2007; Roy Marples <uberlord@gentoo.org>:
+
+    clock init script now handles /etc/adjtime correctly.
+    CLOCK_ADJTIME hinted that it could change the location of /etc/adjtime.
+    This is not the case.
+
   19 Oct 2007; Roy Marples <uberlord@gentoo.org>:
 
     Mount /dev/shm for Linux systems, even not when in /etc/fstab, #196345.
diff --git a/conf.d.Linux/clock b/conf.d.Linux/clock
index a7f4f47d..9fa4547b 100644
--- a/conf.d.Linux/clock
+++ b/conf.d.Linux/clock
@@ -1,19 +1,12 @@
-# If you wish to pass any other arguments to hwclock during bootup, 
+# If you wish to pass any other arguments to hwclock during bootup,
 # you may do so here.
 
 CLOCK_OPTS=""
 
-# Newer FHS specs say this file should live in /var/lib rather than
-# /etc.  If you care about such things, feel free to change this value.
-# Note that a blank value means that you do not wish to even use the
-# adjtime facility.  This is the default behavior as adjtime can be
-# very fragile.  If the clock is updated without updating the adjtime
-# file (which is common when using services such as ntp), then the
-# clock can be screwed up when it gets updated at next boot.
-
-#CLOCK_ADJTIME="/var/lib/adjtime"
-#CLOCK_ADJTIME="/etc/adjtime"
-CLOCK_ADJTIME=""
+# Set CLOCK_ADJTIME if you wish hwclock to try and handle clock drift.
+# Don't set this if you run a ntp service or anything else that handles
+# clock drift.
+CLOCK_ADJTIME="no"
 
 
 ### ALPHA SPECIFIC OPTIONS ###
diff --git a/init.d.Linux/clock b/init.d.Linux/clock
index 144ecbcb..75910808 100755
--- a/init.d.Linux/clock
+++ b/init.d.Linux/clock
@@ -9,13 +9,20 @@ description_save="Saves the current time in the BIOS."
 
 depend() {
 	case "${CLOCK_ADJTIME}" in
-		"")     before *;;
-		/etc/*) need checkroot;;
-		*)      need localmount;;
+		""|no)      before *;;
+		/etc/*|yes) need checkroot;;
+		*)          need localmount;;
 	esac
 }
 
 setupopts() {
+	myopts=
+
+	case "${CLOCK_ADJTIME}" in
+		no)  CLOCK_ADJTIME=;; 
+		yes) CLOCK_ADJTIME="/etc/adjtime";;
+	esac
+
 	case "${RC_SYS}" in
 		UML|VPS|XEN)
 			TBLURB="${RC_SYS}"
@@ -44,19 +51,16 @@ setupopts() {
 	esac
 	[ ${fakeit} -eq 1 ] && return 0
 
-	if [ -z "${CLOCK_ADJTIME}" -o ! -w /etc ] ; then
-		myadj="--noadjfile"
-	else
-		myadj="--adjust"
-	fi
+	[ -w /etc -a -n "${CLOCK_ADJTIME}" ] || myopts="${myopts} --noadjfile"
 
 	[ "${SRM}" = "yes" ] && myopts="${myopts} --srm"
 	[ "${ARC}" = "arc" ] && myopts="${myopts} --arc"
 	myopts="${myopts} ${CLOCK_OPTS}"
 
 	# Make sure user isn't using rc.conf anymore.
-	if grep -q "^CLOCK=" /etc/rc.conf ; then
-		ewarn $"CLOCK should not be set in /etc/rc.conf but in /etc/conf.d/clock"
+	if [ -e /etc/rc.conf ] && \
+	[ -n "$(unset CLOCK; . /etc/rc.conf; echo "${CLOCK}")" ] ; then
+		ewarn "CLOCK should not be set in /etc/rc.conf but in /etc/conf.d/clock"
 	fi
 
 	# Make sure people set their timezone ... we do it here
@@ -70,26 +74,21 @@ setupopts() {
 start() {
 	local myopts= myadj= TBLURB= fakeit=0 errstr="" retval=0
 
-	if [ -x /sbin/hwclock ] ; then
-		[ -w "${CLOCK_ADJTIME}" ] && echo "0.0 0 0.0" > "${CLOCK_ADJTIME}"
-	fi
-
 	setupopts
 
 	if [ ${fakeit} -ne 1 -a -e /proc/modules -a ! -e /dev/rtc ] ; then
 		modprobe -q rtc || modprobe -q genrtc
 	fi
 
-	ebegin "Setting system clock using the hardware clock" "[${TBLURB}]"
+	ebegin "Setting system clock using the hardware clock [${TBLURB}]"
 	if [ ${fakeit} -eq 1 ] ; then
 		retval=0
 	elif [ -x /sbin/hwclock ] ; then
 		# Don't call hwclock unless we need to
-		if [ "${TBLURB}" != "UTC" -o "${myadj}" != "--noadjfile" ] ; then
+		if [ "${TBLURB}" != "UTC" -o "${myopts#*--noadjfile}" = "${myopts}" ] ; then
 			# Since hwclock always exit's with a 0, need to check its output.
-			errstr="$(/sbin/hwclock ${myadj} ${myopts} 2>&1 >/dev/null)"
+			[ -n "${CLOCK_ADJTIME}" ] && errstr="$(/sbin/hwclock --adjust 2>&1 >/dev/null)"
 			errstr="${errstr}$(/sbin/hwclock --hctosys ${myopts} 2>&1 >/dev/null)"
-
 			if [ -n "${errstr}" ] ; then
 				ewarn "${errstr}"
 				retval=1
@@ -117,12 +116,15 @@ stop() {
 	if [ ${fakeit} -eq 1 ] ; then
 		retval=0
 	elif [ -x /sbin/hwclock ] ; then
-		[ -z "$(/sbin/hwclock --systohc ${myopts} 2>&1 >/dev/null)" ]
-		retval=$?
+		errstr="$(LC_ALL=C /sbin/hwclock --systohc ${myopts} 2>&1 >/dev/null)"
+		if [ -n "${errstr}" ] ; then
+			ewarn "${errstr}"
+			retval=1
+		fi
 		errstr="Failed to sync clocks"
 	else
 		retval=1
-		errstr="/sbin/hwclock not found"
+		errstr="hwclock not found"
 	fi
 	eend ${retval} "${errstr}"
 }