gsmd: Work on stopping the respawn script and children

This is using some brute force. Make the shell script write a PID
file and on stop kill the respawn script and then all process names
that are spawned. For the stop we need to know that this is a bash
script.

recipes-openmoko/openmoko-gsmd/files/cell-log

@@ -7,11 +7,13 @@
 # processname: cell_log
 
 PATH=/bin:/usr/bin:/sbin:/usr/sbin
+PIDFILE=/var/run/cell_log.pid
 
 case "$1" in
     start)
         echo -n "Starting cell-log: "
-        start-stop-daemon -S -b -x /etc/gsmd-respawn.sh /usr/bin/cell_log
+        start-stop-daemon -S -b -p $PIDFILE \
+		-x /etc/gsmd-respawn.sh /usr/bin/cell_log
 
         if [ $? = 0 ]; then
             echo "cell-log"
@@ -21,7 +23,7 @@ case "$1" in
         ;;
     stop)
         echo -n "Stopping GSM daemon: "
-        start-stop-daemon -K -x /usr/bin/cell_log
+        start-stop-daemon -K -x bash -p $PIDFILE
         echo "cell-log."
         ;;
     restart|force-reload)

recipes-openmoko/openmoko-gsmd/files/gsmd

@@ -7,6 +7,7 @@
 # processname: gsmd
 
 PATH=/bin:/usr/bin:/sbin:/usr/sbin
+PIDFILE=/var/run/gsmd.pid
 
 [ -f /etc/default/rcS ] && . /etc/default/rcS
 [ -f /etc/default/gsmd ] && . /etc/default/gsmd
@@ -19,7 +20,8 @@ case "$1" in
         [ -n "$GSM_RES" ] && ( echo "0" >$GSM_RES; sleep 2 )
 
         echo -n "Starting GSM daemon: "
-        start-stop-daemon -S -b -x /etc/gsmd-respawn.sh /usr/sbin/gsmd -- gsmd -p $GSM_DEV $GSMD_OPTS -l syslog
+        start-stop-daemon -S -p $PIDFILE -b \
+		-x /etc/gsmd-respawn.sh /usr/sbin/gsmd -- gsmd -p $GSM_DEV $GSMD_OPTS -l syslog
 
         if [ $? = 0 ]; then
             echo "gsmd."
@@ -31,7 +33,7 @@ case "$1" in
         [ -n "$GSM_POW" ] && echo "0" >$GSM_POW
 
         echo -n "Stopping GSM daemon: "
-        start-stop-daemon -K -x /usr/sbin/gsmd
+        start-stop-daemon -K -x bash -p $PIDFILE
         echo "gsmd."
         ;;
     restart|force-reload)

recipes-openmoko/openmoko-gsmd/files/gsmd-respawn.sh

@@ -1,5 +1,12 @@
 #!/usr/bin/env bash
 
+NAME=`basename $1`
+PIDFILE="/var/run/$NAME.pid"
+PID=$$
+echo "$PID" > $PIDFILE
+
+trap "{ rm -f $PIDFILE ; killall -9 $NAME; }" EXIT
+
 while true;
 do
 	echo "Restarting not dealing well with spaces.."