Add log monitoring shutdown script

linux/tg_shutdown.sh

@@ -0,0 +1,124 @@
+#! /bin/bash
+
+# tg_shutdown.sh - Automated shutdown and reboot on receipt of talkgroup
+# Copyright (C) 2017  Tony Corbett, G0WFV and Stuart Scott, VK6LS
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USAp
+
+# exit status ...
+# 1 script not run as root
+# 2 ini file doesn't exist
+
+### CONFIG VARIABLES ###
+
+sysopCallsign=XX0XXX
+iniFile=/path/to/MMDVM.ini
+shutdownTG=999999
+rebootTG=888888
+allowShutdown=1
+allowReboot=1
+
+### DON'T EDIT BELOW HERE ###
+
+# exit if we're not root ...
+[[ $EUID -ne 0 ]] && exit 1
+
+# exit if we can't find the ini file
+[[ -f $iniFile ]] || exit 2
+
+# process the inifile and convert to variables ...
+# 
+# [Foo]
+# Bar=Baz
+#
+# ... becomes the variable $FooBar with the value "Baz"
+# (NOTE: spaces in section headers are replaced by underscores)
+#
+# a real life example ...
+# 
+# [General]
+# Callsign=G0WFV
+#
+# ... becomes the variable $GeneralCallsign with the value "G0WFV"
+
+foo=$(
+	cat $iniFile | while read line
+	do
+		if echo $line | grep '^#.*$' >/dev/null # comment line
+		then
+			# Ignore!
+			continue
+		elif echo $line | grep '^$' >/dev/null # blank line
+		then
+			# Ignore!
+			continue
+		elif echo $line | grep '^\[.*\]$' >/dev/null # [Section Header]
+		then
+			iniSection=$(echo $line | sed 's/^\[\(.*\)\]$/\1/' | sed 's/[ -]//g')
+		elif echo $line | grep '^.*=.*$' >/dev/null # Key=Value pair
+		then
+			iniKey=$(echo $line | sed 's/\(.*\)=.*$/\1/')
+			iniValue=$(echo $line | sed 's/.*=\(.*\)$/\1/')
+			echo $iniSection$iniKey=\"$iniValue\" # print the result in a specific format
+		else # hopefully we'll never get here, but you never know!
+			continue
+		fi
+	done
+) 
+eval $foo
+
+# fix filepath if it doesn't end with a /
+[[ "$(echo ${LogFilePath: -1})" != "/" ]] && LogFilePath="$LogFilePath/"
+
+currentDate=foo # dummy current date variable to kick off the 1st tail!
+shuttingDown=0
+
+while true # main outer loop (run this forever!)
+do
+	checkDate=$(date -u +%Y-%m-%d)
+	if [ "$checkDate" != "$currentDate" ]
+	then
+		kill $tailPID 2>/dev/null
+		currentDate=$checkDate
+		logFile=$LogFilePath$LogFileRoot-$currentDate.log
+
+		tail -n 0 -F $logFile | while read line # inner loop to tail the logfile
+		do
+			# only react to sysop callsign ...
+			foo=$(echo $line | grep "received RF voice header from $sysopCallsign to TG")
+	
+			if [ $? = 0 ]
+			then
+				TG=$(echo $line | sed "s/.*TG\(.*\)$/\1/g")
+	
+				if [ $TG -eq $shutdownTG ] && [ $shuttingDown -eq 0 ] && [ $allowShutdown -eq 1 ]
+				then
+					# shutdown in 1 minute ...
+					shutdown -h +1 >/dev/null 2>&1 && shuttingDown=1
+				elif [ $TG -eq $rebootTG ] && [ $shuttingDown -eq 0 ] && [ $allowReboot -eq 1 ]
+				then
+					# reboot in 1 minute ...
+					shutdown -r +1 >/dev/null 2>&1 && shuttingDown=1
+				elif [ $shuttingDown -eq 1 ]
+				then
+					# cancel shutdown or reboot if sysop tx any TG in 1 min grace period ...
+					shutdown -c && shuttingDown=0
+				fi
+			fi	
+		done & 2>/dev/null # inner loop is run in background so we can periodically check if the date's changed
+		tailPID=$(($! - 1)) # save the PID of the inner loop so we can kill it when the date rolls over
+	fi
+	sleep 1 # check every second for date rollover (reduces cpu load)
+done