Update modem status state on errors

If modemmonitor crash for some reason, status bar is not updated. The
reason is that statusbar check if modemmonitor is running, which it is
when trying to shutdown itself.

We change the way modemmonitor is detected using a single modem state
file. If the file is not present, then the monitor is considered not
running.

This single file permit to add more state in the future, without adding
any more files.

We also add a sleep 1, look like it is required to have instand status
bar update.

Signed-off-by: Stacy Harper <contact@stacyharper.net>
Signed-off-by: Maarten van Gompel <proycon@anaproy.nl>

scripts/core/sxmo_common.sh

@@ -17,6 +17,8 @@ export CACHEDIR="$XDG_CACHE_HOME"/sxmo
 export LOGDIR="$XDG_DATA_HOME"/sxmo/modem
 # shellcheck disable=SC2034
 export CONTACTFILE="$XDG_CONFIG_HOME/sxmo/contacts.tsv"
+# shellcheck disable=SC2034
+export MODEMSTATEFILE="$XDG_RUNTIME_DIR/sxmo.modem.state"
 
 command -v "$KEYBOARD" > /dev/null || export KEYBOARD=svkbd-mobile-intl
 

scripts/core/sxmo_statusbar.sh

@@ -30,14 +30,16 @@ update() {
 
 	# M symbol if modem monitoring is on & modem present
 	MODEMMON=""
-	pgrep -f sxmo_modemmonitor.sh && MODEMMON=""
-	if [ -n "$MODEMMON" ]; then
-		if [ -f /tmp/modem.locked.state ]; then
+	if [ -f "$MODEMSTATEFILE" ]; then
+		MODEMSTATE="$(cat "$MODEMSTATEFILE")"
+		if [ locked = "$MODEMSTATE" ]; then
 			MODEMMON=""
-		elif [ -f /tmp/modem.registered.state ]; then
+		elif [ registered = "$MODEMSTATE" ]; then
 			MODEMMON=""
-		elif [ -f /tmp/modem.connected.state ]; then
+		elif [ connected = "$MODEMSTATE" ]; then
 			MODEMMON=""
+		else
+			MODEMMON=""
 		fi
 	fi
 

scripts/modem/sxmo_modemmonitor.sh

@@ -12,6 +12,9 @@ err() {
 }
 
 gracefulexit() {
+	rm "$MODEMSTATEFILE"
+	sxmo_statusbarupdate.sh
+	sleep 1
 	echo "sxmo_modemmonitor: gracefully exiting (on signal or after error)">&2
 	kill -9 0
 }
@@ -183,15 +186,17 @@ checkfornewtexts() {
 }
 
 initialmodemstatus() {
-	rm /tmp/modem.*.state 2>/dev/null
+	touch "$MODEMSTATEFILE"
 	state=$(mmcli -m "$(modem_n)")
 	if echo "$state" | grep -q -E "^.*state:.*connected.*$"; then
-		touch /tmp/modem.connected.state
+		echo connected > "$MODEMSTATEFILE"
 	elif echo "$state" | grep -q -E "^.*state:.*registered.*$"; then
-		touch /tmp/modem.registered.state
+		echo registered > "$MODEMSTATEFILE"
 	elif echo "$state" | grep -q -E "^.*state:.*locked.*$"; then
-		touch /tmp/modem.locked.state
+		echo locked > "$MODEMSTATEFILE"
 		pidof sxmo_unlocksim.sh || sxmo_unlocksim.sh &
+	else
+		echo unknown > "$MODEMSTATEFILE"
 	fi
 }
 
@@ -228,21 +233,22 @@ mainloop() {
 	dbus-monitor --system "interface='org.freedesktop.ModemManager1.Modem',type='signal',member='StateChanged'" | \
 		while read -r line; do
 			if echo "$line" | grep -E "^signal.*StateChanged"; then
-				rm /tmp/modem.*.state 2>/dev/null
 				# shellcheck disable=SC2034
 				read -r oldstate #unused but we need to read past it
 				read -r newstate
 				if echo "$newstate" | grep "int32 2"; then
-					touch /tmp/modem.locked.state
+					echo locked > "$MODEMSTATEFILE"
 					pidof sxmo_unlocksim.sh || sxmo_unlocksim.sh &
 				elif echo "$newstate" | grep "int32 8"; then
-					touch /tmp/modem.registered.state
+					echo registered > "$MODEMSTATEFILE"
 					checkforfinishedcalls
 					checkforincomingcalls
 					checkfornewtexts
 				elif echo "$newstate" | grep "int32 11"; then
-					touch /tmp/modem.connected.state
+					echo connected > "$MODEMSTATEFILE"
 					#3G/2G/4G available
+				else
+					echo unknown > "$MODEMSTATEFILE"
 				fi
 				sxmo_statusbarupdate.sh
 			fi
@@ -253,7 +259,7 @@ mainloop() {
 	wait
 	wait
 
-	rm /tmp/modem.*.state 2>/dev/null
+	rm "$MODEMSTATEFILE" 2>/dev/null
 	sxmo_statusbarupdate.sh
 }