80 lines
2.0 KiB
Bash
Executable File
80 lines
2.0 KiB
Bash
Executable File
#!/bin/sh
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# This script enables a sort of timerescue System
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# for Systems without a Realtime Clock
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# like TP-Link MR3020 , RaspberryPI
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#
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# It does not reflect the real time, but
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# gives a sort of stability to complete standalone
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# systems.
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#
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# Licenced under GPL-2 @ 2012,2015
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# Matthias Strubel matthias.strubel@aod-rgp.de
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##function for similar saving & getting time
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get_datetime() {
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# Get format from piratebox.conf
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date $TIMESAVE_FORMAT
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}
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# Load configfile
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if [ -z $1 ] || [ -z $2 ] ; then
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echo "Set up a crontab entry for regulary saving the time"
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echo "Usage $0 <path to piratebox.conf> <step>"
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echo " Valid steps are:"
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echo " install - installs the needed parts into crontab"
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echo " save - saves time into file"
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echo " recover - recovers the time from a file"
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exit 1
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fi
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. $1
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if [ "$2" = "install" ] ; then
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crontab -l > $PIRATEBOX_FOLDER/tmp/crontab 2> /dev/null
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echo "#--- Crontab for PirateBox-Timesave" >> $PIRATEBOX_FOLDER/tmp/crontab
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echo " */5 * * * * $PIRATEBOX_FOLDER/bin/timesave.sh $PIRATEBOX_FOLDER/conf/piratebox.conf save " >> $PIRATEBOX_FOLDER/tmp/crontab
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crontab $PIRATEBOX_FOLDER/tmp/crontab
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echo "initialize timesave file"
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touch $TIMESAVE
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chmod a+rw $TIMESAVE
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get_datetime > $TIMESAVE
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echo "Remember MAY have to cron active..."
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echo " on OpenWrt run: /etc/init.d/piratebox enable"
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exit 0
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fi
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if [ "$2" = "save" ] ; then
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if [ -e $TIMESAVE ] ; then
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if [ `get_datetime` -lt `cat $TIMESAVE` ] ; then
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logger -s "$0 : sorry, current date-time is lower then saved one, don't save it this time"
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exit 1
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fi
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fi
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#Save Datetime in a recoverable format...
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get_datetime > $TIMESAVE
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exit 0
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fi
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if [ "$2" = "recover" ] ; then
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if [ `get_datetime` -lt `cat $TIMESAVE` ] ; then
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date -s `cat $TIMESAVE `
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[ "$?" != "0" ] && echo "error in recovering time" && exit 255
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echo "Time recovered"
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exit 0
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else
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echo "Sorry, changing timebackward via timesave is not possible"
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exit 1
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fi
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fi
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