I was hoping that a couple of script lines using the "date" command
would do the trick here, in terms of translating an epoch time into a
"local" epoch time. But I haven't been able to make that work.
So here's the primitive-pete version that (hopefully) sets the wakeup
time correctly regardless of whether the hardware clock is set to UTC
or local time.
scwakeup.sh:
Code:
--------------------
#!/bin/sh
#
# SrvrPowerCtrl plugin helper script for linux.
#
# This script will set the system's RTC to wake the system up in advance of a
programmed SqueezeCenter alarm.
#
# It attempts to accommodate hardware clocks set either to UTC or local time.
(Thnx to rickwookie.)
#
#
# Copy this script to /usr/bin/scwakeup.sh: cp ./scwakeup.sh
/usr/bin/scwakeup.sh
#
# Give root only permissions: chown root:root /usr/bin/scwakeup.sh
#
# Make it executable: chmod a+x /usr/bin/scwakeup.sh
#
# Test it: sudo /usr/bin/scwakeup.sh 1234567890
#
# View the log: cat /var/log/squeezecenter/srvrpowerctrl.log
#
# See http://www.mythtv.org/wiki/index.php/ACPI_Wakeup
# for apci wakeup troubleshooting...
#
debug=1
log_file=/var/log/squeezecenter/srvrpowerctrl.log
clear
rm $log_file
#Try to figure out if RTC is set to UTC or local time..
rtcStatus=`/sbin/hwclock --debug --directisa`
if [[ "$rtcStatus" =~ "Hardware clock is on UTC time" ]]
then
RTCisUTC=1
else
RTCisUTC=0
fi
#Get the wakeup time from the cmd line arg..
waketimeUTC=$1
waketimeUTCp=`/bin/date -u -d "1970-01-01 $waketimeUTC seconds" +"%Y-%m-%d
%H:%M:%S"`
#Compute the local time offset in seconds from UTC..
localOffsetStr=`/bin/date +%z`
#Is our offset from UTC positive (east) or negative (west)?
if [[ "$localOffsetStr" =~ "\+" ]]
then
IsWest=0
else
IsWest=1
fi
localOffsetHours="${localOffsetStr:1:2}"
localOffsetMinutes="${localOffsetStr:3:2}"
var="($localOffsetHours*3600)+($localOffsetMinutes*60)"
localOffsetSeconds="`/bin/echo $var | /usr/bin/bc`"
if [[ $IsWest>0 ]]
then
localOffsetSeconds=-$localOffsetSeconds
fi
#Compute the local wakeup time..
var="$waketimeUTC+$localOffsetSeconds"
waketimeLocal="`/bin/echo $var | /usr/bin/bc`"
waketimeLocalp=`/bin/date -u -d "1970-01-01 $waketimeLocal seconds"
+"%Y-%m-%d %H:%M:%S"`
if [[ $debug>0 ]]
then
if [[ $RTCisUTC>0 ]]
then
echo " RTC is set to == UTC" >>$log_file
else
echo " RTC is set to == localtime"
>>$log_file
fi
/bin/echo " Localtime offset from UTC == $localOffsetStr"
>>$log_file
/bin/echo "Localtime offset seconds form UTC == $localOffsetSeconds"
>>$log_file
/bin/echo " waketimeUTC == $waketimeUTC"
>>$log_file
/bin/echo " waketimeUTCp == $waketimeUTCp"
>>$log_file
/bin/echo " waketime local == $waketimeLocal"
>>$log_file
/bin/echo " waketime localp == $waketimeLocalp"
>>$log_file
fi
#Which type of RTC interface is present?
if [ -f /sys/class/rtc/rtc0/wakealarm ]
then
if [[ $RTCisUTC>0 ]]
then
#Kernels > 2.6.22 and higher use /sys/class/rtc/rtc0/wakealarm
/bin/echo "Setting /sys/class/rtc/rtc0/wakealarm to
$waketimeUTC ($waketimeUTCp)" >>$log_file
/bin/echo 0 >/sys/class/rtc/rtc0/wakealarm
/bin/echo $waketimeUTC >/sys/class/rtc/rtc0/wakealarm
else
/bin/echo "Setting /sys/class/rtc/rtc0/wakealarm to
$waketimeLocal ($waketimeLocalp)" >>$log_file
/bin/echo 0 >/sys/class/rtc/rtc0/wakealarm
/bin/echo $waketimeLocal >/sys/class/rtc/rtc0/wakealarm
fi
elif [ -f /proc/acpi/alarm ]
then
if [ $RTCisUTC>0 ]
then
#Kernels < 2.6.21 and lower use /proc/acpi/alarm
/bin/echo "Setting /proc/acpi/alarm to $waketimeUTCp"
>>$log_file
/bin/echo $waketimeUTCp >/proc/acpi/alarm
else
/bin/echo "Setting /proc/acpi/alarm to $waketimeLocalp"
>>$log_file
/bin/echo $waketimeLocalp >/proc/acpi/alarm
fi
else
/bin/echo "SrvrPowerCtrl does not support RTC wakeup on this system!"
>>$log_file
fi
if [[ $debug>0 ]]
then
/bin/cat $log_file
fi
--------------------
rickwookie: would you be willing to test this?
--
gharris999
------------------------------------------------------------------------
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View this thread: http://forums.slimdevices.com/showthread.php?t=62339
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