POSIX sh empty value check compatibility - part 1

# Conflicts:
#	debian/resources/switch/package-all.sh
#	debian/resources/switch/package-release.sh

debian/install.sh

@@ -6,41 +6,41 @@ cd "$(dirname "$0")"
 . ./resources/colors.sh
 . ./resources/arguments.sh
 
-if [ $CPU_CHECK = true ] && [ $USE_SWITCH_SOURCE = false ]; then
+if [ .$CPU_CHECK = .true ] && [ .$USE_SWITCH_SOURCE = .false ]; then
 	#check what the CPU and OS are
 	OS_test=$(uname -m)
 	CPU_arch='unknown'
 	OS_bits='unknown'
 	CPU_bits='unknown'
-	if [ $OS_test = 'armv7l' ]; then
+	if [ .$OS_test = .'armv7l' ]; then
 		OS_bits='32'
 		CPU_bits='32'
 		# RaspberryPi 3 is actually armv8l but current Raspbian reports the cpu as armv7l and no Raspbian 64Bit has been released at this time
 		CPU_arch='arm'
-	elif [ $OS_test = 'armv8l' ]; then
+	elif [ .$OS_test = .'armv8l' ]; then
 		# We currently have no test case for armv8l
 		OS_bits='unknown'
 		CPU_bits='64'
 		CPU_arch='arm'
-	elif [ $OS_test = 'i386' ]; then
+	elif [ .$OS_test = .'i386' ]; then
 		OS_bits='32'
-	if [ "$(grep -o -w 'lm' /proc/cpuinfo)" = 'lm' ]; then
+	if [ .$(grep -o -w 'lm' /proc/cpuinfo | head -n 1) = .'lm' ]; then
 			CPU_bits='64'
 		else
 			CPU_bits='32'
 		fi
 		CPU_arch='x86'
-	elif [ $OS_test = 'i686' ]; then
+	elif [ .$OS_test = .'i686' ]; then
 		OS_bits='32'
-		if [ $(grep -o -w 'lm' /proc/cpuinfo) = 'lm' ]; then
+		if [ .$(grep -o -w 'lm' /proc/cpuinfo | head -n 1) = .'lm' ]; then
 			CPU_bits='64'
 		else
 			CPU_bits='32'
 		fi
 		CPU_arch='x86'
-	elif [ $OS_test = 'x86_64' ]; then
+	elif [ .$OS_test = .'x86_64' ]; then
 		OS_bits='64'
-		if [ $(grep -o -w 'lm' /proc/cpuinfo) = 'lm' ]; then
+		if [ .$(grep -o -w 'lm' /proc/cpuinfo | head -n 1) = .'lm' ]; then
 			CPU_bits='64'
 		else
 			CPU_bits='32'
@@ -48,11 +48,11 @@ if [ $CPU_CHECK = true ] && [ $USE_SWITCH_SOURCE = false ]; then
 		CPU_arch='x86'
 	fi
 	
-	if [ $CPU_arch = 'arm' ]; then
-		if [ $OS_bits = '32' ]; then
+	if [ .$CPU_arch = .'arm' ]; then
+		if [ .$OS_bits = .'32' ]; then
 			export USE_SWITCH_PACKAGE_UNOFFICIAL_ARM=true
 			verbose "Correct CPU/OS detected, using unofficial arm repo"
-		elif [ $OS_bits = '64' ]; then
+		elif [ .$OS_bits = .'64' ]; then
 			error "You are using a 64bit arm OS this is unsupported"
 			warning " please rerun with --use-switch-source"
 			exit 3
@@ -61,15 +61,15 @@ if [ $CPU_CHECK = true ] && [ $USE_SWITCH_SOURCE = false ]; then
 			warning " please rerun with --use-switch-source"
 			exit 3
 		fi
-	elif [ $CPU_arch = 'x86' ]; then
-		if [ $OS_bits = '32' ]; then
+	elif [ .$CPU_arch = .'x86' ]; then
+		if [ .$OS_bits = .'32' ]; then
 			error "You are using a 32bit OS this is unsupported"
-			if [ $CPU_bits = '64' ]; then
+			if [ .$CPU_bits = .'64' ]; then
 				warning " Your CPU is 64bit you should consider reinstalling with a 64bit OS"
 			fi
 			warning " please rerun with --use-switch-source"
 			exit 3
-		elif [ $OS_bits = '64' ]; then
+		elif [ .$OS_bits = .'64' ]; then
 			verbose "Correct CPU/OS detected"
 		else
 			error "Unknown OS_bits $OS_bits this is unsupported"
@@ -104,8 +104,8 @@ resources/php.sh
 resources/fail2ban.sh
 
 #FreeSWITCH
-if [ $USE_SWITCH_SOURCE = true ]; then
-	if [ $USE_SWITCH_MASTER = true ]; then
+if [ .$USE_SWITCH_SOURCE = .true ]; then
+	if [ .$USE_SWITCH_MASTER = .true ]; then
 		resources/switch/source-master.sh
 	else
 		resources/switch/source-release.sh
@@ -121,14 +121,14 @@ if [ $USE_SWITCH_SOURCE = true ]; then
 	resources/switch/source-systemd.sh
 
 else
-	if [ $USE_SWITCH_MASTER = true ]; then
-		if [ $USE_SWITCH_PACKAGE_ALL = true ]; then
+	if [ .$USE_SWITCH_MASTER = .true ]; then
+		if [ .$USE_SWITCH_PACKAGE_ALL = .true ]; then
 			resources/switch/package-master-all.sh
 		else
 			resources/switch/package-master.sh
 		fi
 	else
-		if [ $USE_SWITCH_PACKAGE_ALL = true ]; then
+		if [ .$USE_SWITCH_PACKAGE_ALL = .true ]; then
 			resources/switch/package-all.sh
 		else
 			resources/switch/package-release.sh

debian/resources/arguments.sh

@@ -31,7 +31,7 @@ if [ -z "$CPU_CHECK" ]; then
 	  esac
 	done
 	
-	if [ $HELP = true ]; then
+	if [ .$HELP = .true ]; then
 		warning "Debian installer script"
 		warning "	--use-switch-source will use freeswitch from source rather than ${green}(default:packages)"
 		warning "	--use-switch-package-all if using packages use the meta-all package"

debian/resources/fail2ban.sh

@@ -23,7 +23,7 @@ cp fail2ban/nginx-dos.conf /etc/fail2ban/filter.d/nginx-dos.conf
 cp fail2ban/jail.local /etc/fail2ban/jail.local
 
 #update config if source is being used
-if [ $USE_FREESWITCH_SOURCE = true ]; then
+if [ .$USE_FREESWITCH_SOURCE = .true ]; then
 	sed 's#var/log/freeswitch#usr/local/freeswitch/log#g' -i /etc/fail2ban/jail.local
 fi
 

debian/resources/fusionpbx.sh

@@ -13,7 +13,7 @@ verbose "Installing FusionPBX"
 apt-get install -y --force-yes vim git dbus haveged ssl-cert
 apt-get install -y --force-yes ghostscript libtiff5-dev libtiff-tools
 
-if [ $USE_SYSTEM_MASTER = true ]; then
+if [ .$USE_SYSTEM_MASTER = .true ]; then
 	verbose "Using master"
 	BRANCH=""
 else

debian/resources/reboot_phones.sh

@@ -24,7 +24,7 @@ INPUT=$FILE
 #Loop through the registrations and reboot
 [ ! -f $INPUT ] &while read reg_user realm extra
 do
-        if [ "$realm" = "$domain" ]; then
+        if [ ."$realm" = ."$domain" ]; then
                 eval 'fs_cli -x "luarun app.lua event_notify internal reboot $reg_user@$realm $vendor"'
 		if [ "$pausetime" > 0 ]; then
 			sleep $pausetime