khanat-opennel-code/code/ryzom/server/patchman_cfg/admin_install/patchman/service_launcher.sh

#!/bin/sh

# the objective is to make a launcher script that works with a command file to determine when to launch the application that it is responsible for

DOMAIN=$(pwd |sed "s%/srv/core/%%" | sed "s%/.*%%")
NAME_BASE=$(pwd | sed 's/\/srv\/core\///' | sed 's/^.*\///')

#if [ _$DOMAIN == _pre_live ]
#    then
    CTRL_FILE=${NAME_BASE}.launch_ctrl
    NEXT_CTRL_FILE=${NAME_BASE}.deferred_launch_ctrl
#elif [ _$DOMAIN == _pre_pre_live ]
#    then
#    CTRL_FILE=${NAME_BASE}.launch_ctrl
#    NEXT_CTRL_FILE=${NAME_BASE}.deferred_launch_ctrl
#else
#    CTRL_FILE=${NAME_BASE}_immediate.launch_ctrl
#    NEXT_CTRL_FILE=${NAME_BASE}_waiting.launch_ctrl
#fi
STATE_FILE=${NAME_BASE}.state
START_COUNTER_FILE=${NAME_BASE}.start_count
CTRL_CMDLINE=$*
CTRL_COMMAND=""

echo
echo ---------------------------------------------------------------------------------
echo Starting service launcher
echo ---------------------------------------------------------------------------------
printf "%-16s = " CMDLINE         ; echo $CTRL_CMDLINE
printf "%-16s = " CTRL_FILE       ; echo $CTRL_FILE
printf "%-16s = " NEXT_CTRL_FILE  ; echo $NEXT_CTRL_FILE
printf "%-16s = " STATE_FILE      ; echo $STATE_FILE
echo ---------------------------------------------------------------------------------
echo

# reinit the start counter
echo 0 > $START_COUNTER_FILE
START_COUNTER=0

# always give ras a first run
if [ "${NAME_BASE}" = "ras" ]
then
    echo Force admin service first startup
    printf LAUNCH > $CTRL_FILE
fi

echo Press ENTER to launch program
while true
do

  # see if the conditions are right to launch the app
  if [ -e $CTRL_FILE ]
      then

      # a control file exists so read it's contents
      CTRL_COMMAND=$(cat $CTRL_FILE)

      # do we have a 'launch' command?
      if [ "$CTRL_COMMAND" = "LAUNCH" ]
          then

          # update the start counter
          START_COUNTER=$(( $START_COUNTER + 1 ))
          echo $START_COUNTER > $START_COUNTER_FILE

          # big nasty hack to deal with the special cases of ryzom_naming_service and ryzom_admin_service who have badly names cfg files
          for f in ryzom_*cfg
            do
            cp $f $(echo $f | sed "s/ryzom_//")
          done

          # we have a launch command so prepare, launch, wait for exit and do the housekeeping
          echo -----------------------------------------------------------------------
          echo Launching ...
          echo
          printf RUNNING > $STATE_FILE

              $CTRL_CMDLINE

          echo -----------------------------------------------------------------------
          printf STOPPED > $STATE_FILE

          # consume (remove) the control file to allow start once
          rm $CTRL_FILE

          echo Press ENTER to relaunch
       fi
  fi

  # either we haven't launched the app yet or we have launched and it has exitted
  if [ -e $NEXT_CTRL_FILE ]
  then
      # we have some kind of relaunch directive lined up so deal with it
      mv $NEXT_CTRL_FILE $CTRL_FILE
  else
      # give the terminal user a chance to press enter to provoke a re-launch
      HOLD=`sh -ic '{ read a; echo "ENTER" 1>&3; kill 0; } | { sleep 2; kill 0; }' 3>&1 2>/dev/null`
      if [ "${HOLD}" = "ENTER" ]
      then
          printf LAUNCH > $CTRL_FILE
      fi
  fi

done