+stop ()
+{
+ if mounted $PLC_ROOT ; then
+ chroot $PLC_ROOT /sbin/service plc $PLC_OPTIONS stop $*
+ check
+ fi
+
+ # Stopped everything
+ if [ -z "$1" ] ; then
+ umount_plc
+ fi
+}
+
+mountstatus_plc ()
+{
+ for dir in $PLC_ROOT/proc $PLC_ROOT/data $PLC_ROOT ; do
+ if mounted $dir ; then
+ echo $dir
+ fi
+ done
+}
+
+# safestop : tries to stop normally; if that fails, kills processes that are still using /plc
+# needs the lsof rpm in the root context (should be a dependency of the myplc spec)
+function check_command ()
+{
+ command=$1; shift
+ found=$(type -p $command)
+ if [ -z "$found" ] ; then
+ echo "$COMMAND : requires command $command, was not found - exiting"
+ exit 1
+ fi
+}
+
+
+### when process stil use /plc/root, we cannot umount it
+function kill_all ()
+{
+ [ -n "$DEBUG" ] && set -x
+ check_command lsof
+
+ echo -n "Killing processes using $PLC_ROOT and $PLC_DATA: "
+ # initialize process list
+ former_process_list="unlikely"
+
+ # we ignore unknown uids for now, since we run in the chroot jail anyway
+ # not too sure about that though,
+ while true; do
+ # get the list of processes - collapse and remove empty lines
+ process_list=$(lsof -t +D $PLC_ROOT +D $PLC_DATA)
+ if [ -z "$process_list" ] ; then
+ # we are done, let's bail out
+ success "$PLC_ROOT clear" ; echo ; return
+ fi
+ if [ "$process_list" = "$former_process_list" ] ; then
+ # we are stuck, no progress since last time : exit on error
+ failure "$PLC_ROOT locked" ; echo ; return
+ fi
+ # record for next loop
+ former_process_list="$process_list"
+ # kill them
+ kill $process_list
+ sleep 2
+ # check there are dead
+ for pid in $process_list ; do
+ ps -o pid $pid &> /dev/null
+ if [ "$?" = 0 ] ; then
+ [ -n "$DEBUG" ] && echo "$pid survived kill - forcing kill -9"
+ kill -9 $pid
+ fi
+ done
+ done
+}
+
+# Get command
+shift $(($OPTIND - 1))
+command=$1
+
+# Get step(s)
+shift 1
+
+case "$command" in