Work without `bc` (fixes issue 3566)

When installing the JRE, show a pulsating progress bar if possible (gnome) else just show a "Please wait..." rather than showing nothing. (Fixes issue 1742)

Change-Id: Icd1aac2972371880362d2938ff350af4182dba36
Reviewed-on: http://gerrit.dmdirc.com/561
Automatic-Compile: Chris Smith <chris@dmdirc.com>
Reviewed-by: Chris Smith <chris@dmdirc.com>

installer/linux/getjre.sh

 	length=`${CURL} -# -I ${URL} 2>&1 | grep "Content-Length:"| awk '{print $2}'`
 fi;
 
-# Convert the length from Bytes to something user-friendly
-if [ ${actualLength} -ge 1048576 ]; then
+# Convert the length from Bytes to something user-friendly is possible.
+BC=`which bc`
+if [ "${BC}" = "" ]; then
+	niceLength=${actualLength}"B"
+elif [ ${actualLength} -ge 1048576 ]; then
 	niceLength=`echo "scale=2; ${actualLength}/1048576" | bc`"MB"
 elif [ ${actualLength} -ge 1024 ]; then
 	niceLength=`echo "scale=2; ${actualLength}/1024" | bc`"KB"
 else
-	niceLength=`echo "scale=2; ${actualLength}/1024" | bc`"B"
+	niceLength=`echo "scale=2; ${actualLength}" | bc`"B"
 fi;
 
 if [ "${actualLength}" = "6" ]; then
 			exit 1;
 		fi;
 	done;
+	/bin/sh ${PWD}/progressbar.sh --watchdog ${progressbarpid}
 	wgetpid=""
 	if [ "${ISFREEBSD}" != "" -o "${ISAINFO}" != "" ]; then
 		echo "Killing progressbar"

installer/linux/installjre.sh

 			STARTLINE=${STARTLINE%%:*}
 			# Location of license end
 			ENDLINE=`grep ${GREPOPTS} "Do you agree to the above license terms?" jre.bin`
-			ENDLINE=$((${ENDLINE%%:*} - 4))
+			ENDLINE=$((${ENDLINE%%:*} - 2))
 			# Location of checksum start
 			CSSTARTLINE=`grep ${GREPOPTS} "^if \[ -x /usr/bin/sum \]; then$" jre.bin`
 			CSSTARTLINE=${CSSTARTLINE%%:*}
 			tail ${TAILOPTS}$((${ENDLINE})) jre.bin | head -n $((${CSSTARTLINE} -1 - ${ENDLINE})) >> jre.bin.tmp
 			echo "tail \${tail_args} +${SCENDLINE} \"\$0\" > \$outname" >> jre.bin.tmp
 			tail ${TAILOPTS}$((${CSENDLINE})) jre.bin >> jre.bin.tmp
-		
-			yes | sh jre.bin.tmp
-			rm -Rf jre.bin.tmp
+
+			PIPE=`mktemp installprogresspipe.XXXXXXXXXXXXXX`
+			/bin/sh ${PWD}/progressbar.sh --pulsate "Installing JRE. Please wait.." 100 ${PIPE} &
+			sleep 1;
+			echo "-1" > ${PIPE}
+			# This is supposed to write to the pipe as it does stuff, but it appears
+			# not to work properly.
+			yes | sh jre.bin.tmp | egrep --line-buffered -i "(extracting|inflating):" > ${PIPE};
+			echo "quit" > ${PIPE}
+			# rm -Rf jre.bin.tmp
 		fi;
 		
 		mv ${JREJAVAHOME} ${installdir}
-		
+
 		if [ "0" = "${UID}" ]; then
 			# Add to global path.
 			if [ -e "/usr/bin/java" ]; then
 else
 	errordialog "Java Install" "You must agree to the license before java can be installed"
 fi;
-exit 1;
+exit 1;

installer/linux/progressbar.sh

 QDBUS=`which qdbus`
 DBUSSEND=`which dbus-send`
 DCOP=`which dcop`
+BC=`which bc`
 KDETYPE=""
 if [ "${ISKDE}" != "" -o "${ZENITY}" = "" ]; then
 	# Check to see if we have the dcop or dbus binaries needed..
 	exit 1;
 fi;
 
+if [ "${1}" = "--pulsate" ]; then
+	shift;
+	PULSATE="1"
+else
+	PULSATE="0"
+fi;
+
 CAPTION=${1}
 FILESIZE=${2}
-WGETPID=${3}
+WGETPID=${4}
 progresswindow=""
 TYPE=""
 PIPE="progresspipe_${$}"
 				break;
 			fi;
 		fi;
+		
 		input=`cat "${PIPE}" | tail ${TAILOPTS}1`
 		if [ "${input}" = "quit" ]; then
 			break;
 		elif [ "${input}" != "" ]; then
 			data=${input}
 			input=""
-			res=`echo "scale=4 ; (${data}/${FILESIZE})*100" | bc`
-			val=${res%%.*}
-			if [ "${val}" = "" ]; then
-				val=0
+			if [ "${PULSATE}" = "1" ]; then
+				val=-1
+				
+				if [ "${data}" != "-1" ]; then
+					if [ "${TYPE}" = "KDE" ]; then
+						if [ "${KDETYPE}" = "dcop" ]; then
+							${DCOP} ${progresswindow} setLabelText "${data}"
+						elif [ "${KDETYPE}" = "qdbus" ]; then
+							${QDBUS} ${progresswindow} org.kde.kdialog.ProgressDialog.setLabelText "${data}"
+						elif [ "${KDETYPE}" = "dbussend" ]; then
+							${DBUSSEND} --print-reply --dest=${progresswindow} org.kde.kdialog.ProgressDialog.setLabelText "string:\'${data}\'" > /dev/null
+						fi;
+					elif [ "${TYPE}" = "GNOME" ]; then
+						echo "${data}" | sed 's/^/# /g'
+					else
+						echo "${data}"
+					fi;
+				fi;
+				
+			else
+				if [ "${BC}" != "" ]; then
+					res=`echo "scale=4 ; (${data}/${FILESIZE})*100" | bc`;
+				else
+					# Note, this will return 0 or 100, nothing else, better than spamming
+					# errors and never closing tho.
+					res=`echo $(( (${data}/${FILESIZE})*100 ))`;
+				fi;
+				val=${res%%.*}
+				if [ "${val}" = "" ]; then
+					val=0
+				fi;
 			fi;
 			if [ "${TYPE}" = "KDE" ]; then
 				if [ "${KDETYPE}" = "dcop" ]; then
 					echo "-> "${val}"%"
 				fi;
 			fi;
+			echo "Val: ${val}";
 			if [ "${val}" = "100" ]; then
 				retval="0"
 				CONTINUE="0"
 	fi;
 	echo "Exiting with value: $retval"
 	if [ "${WGETPID}" != "" ]; then
-		echo "Attempting to kill wget"
+		echo "Attempting to kill wget (${WGETPID})"
 		kill -9 ${WGETPID}
 	fi;
 	
 if [ "" != "${KDIALOG}" -a "" != "${DISPLAY}" -a "" = "${ISGNOME}" -a "${USEKDIALOG}" = "1" ]; then
 	echo "Progress dialog on Display: ${DISPLAY}"
 	progresswindow=`${KDIALOG} --title "DMDirc: ${CAPTION}" --progressbar "${CAPTION}" 100`
+	if [ "${PULSATE}" = "1" ]; then
+		SHOWCANCEL="false"
+	else
+		SHOWCANCEL="true"
+	fi;
 	if [ "${KDETYPE}" = "dcop" ]; then
 		${DCOP} ${progresswindow} setAutoClose true
-		${DCOP} ${progresswindow} showCancelButton true
+		${DCOP} ${progresswindow} showCancelButton ${SHOWCANCEL}
 	elif [ "${KDETYPE}" = "qdbus" ]; then
 		${QDBUS} ${progresswindow} org.freedesktop.DBus.Properties.Set org.kde.kdialog.ProgressDialog autoClose true
-		${QDBUS} ${progresswindow} org.kde.kdialog.ProgressDialog.showCancelButton true
+		${QDBUS} ${progresswindow} org.kde.kdialog.ProgressDialog.showCancelButton ${SHOWCANCEL}
 	elif [ "${KDETYPE}" = "dbussend" ]; then
-		${DBUSSEND} --print-reply --dest=${progresswindow} org.kde.kdialog.ProgressDialog.showCancelButton boolean:true >/dev/null
+		${DBUSSEND} --print-reply --dest=${progresswindow} org.kde.kdialog.ProgressDialog.showCancelButton boolean:${SHOWCANCEL} >/dev/null
 		${DBUSSEND} --print-reply --dest=${progresswindow} org.freedesktop.DBus.Properties.Set string:'org.kde.kdialog.ProgressDialog' string:'autoClose' variant:boolean:true > /dev/null
 	fi;
 	TYPE="KDE"
 	readprogress
 	CONTINUE="0"
 	echo "Progress Bar Complete"
-elif [ "" != "${ZENITY}" -a "" != "${DISPLAY}" ]; then
+elif [ "" ! "${ZENITY}" -a "" != "${DISPLAY}" ]; then
 	# Else, if zenity exists and we have a display
 	echo "Progress dialog on Display: ${DISPLAY}"
 	TYPE="GNOME"
-	readprogress | ${ZENITY} --progress --auto-close --auto-kill --title "DMDirc: ${CAPTION}" --text "${CAPTION}"
+	if [ "${PULSATE}" = "1" ]; then
+		readprogress | ${ZENITY} --progress --pulsate --auto-close --title "DMDirc: ${CAPTION}" --text "${CAPTION}"
+	else
+		readprogress | ${ZENITY} --progress --auto-close --auto-kill --title "DMDirc: ${CAPTION}" --text "${CAPTION}"
+	fi;
 	CONTINUE="0"
 	echo "Progress Bar Complete"
 else