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#! /bin/sh
### BEGIN INIT INFO
# Provides:          boinc boinc-client
# Required-Start:    $local_fs $remote_fs
# Required-Stop:     $local_fs $remote_fs
# Should-Start:      x11-common network-manager x-display-manager gdm kdm xdm wdm ldm sdm nodm dbus lightdm
# Should-Stop:       x11-common
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: BOINC core client
# Description:       core client for the BOINC distributed computing
#                    infrastructure
### END INIT INFO

# Debian init.d script for the BOINC core client
# Copyright © 2005, 2006, 2007, 2008
# Debian BOINC Maintainers <pkg-boinc-devel@lists.alioth.debian.org>
#
# This file is licensed under the terms of the GNU General Public License,
# Version 2 or any later version published by the Free Software Foundation.

set -e
. /lib/lsb/init-functions

# Default values for the variables that are also set in the defaults file.
ENABLED=0
SCHEDULE=0
BOINC_USER=boinc
BOINC_DIR=/var/lib/boinc-client
BOINC_CLIENT=/usr/bin/boinc
BOINC_OOM_ADJ=15
BOINC_OOM_SCORE_ADJ=1000

#VALGRIND_OPTIONS="-v --log-file=/tmp/valgrind_boinc.log "
VALGRIND_OPTIONS=""

# nice levels
BOINC_NICE_CLIENT=10
BOINC_NICE_APP_DEFAULT=19    # minimal
#BOINC_NICE_APP_GPU=5        # less than regular, not yet used

# ionice classes
BOINC_IONICE_CLIENT=3        # idle
#BOINC_IONICE_APP_DEFAULT=3  # idle, not yet used
#BOINC_IONICE_APP_GPU=2      # best effort, not yet used


# Source defaults file. Edit that file to configure this script.
if [ -e /etc/default/boinc-client ]; then
  . /etc/default/boinc-client
fi

# Quit quietly, if $ENABLED is 0.
test "$ENABLED" != "0" || exit 0

if [ "$BOINC_CLIENT" = "/usr/bin/boinc" ]; then
  test -x "$BOINC_CLIENT" || exit 0
elif [ ! -x "$BOINC_CLIENT" ]; then
  log_failure_msg "BOINC client '$BOINC_CLIENT' does not exist or is not" \
    "executable."
  exit 5
fi

if [ ! -d "$BOINC_DIR" ]; then
  log_failure_msg "BOINC data directory '$BOINC_DIR' does not exist."
  exit 6
fi

if [ -z "$BOINC_USER" ]; then
  log_failure_msg "BOINC_USER variable is empty. Set it to a user to run" \
    "the BOINC core client."
  exit 6
fi

if [ ! -z "$BOINC_OPTS" ]; then
	(echo $BOINC_OPTS | grep -- '--daemon' 1>/dev/null) &&
		log_warning_msg "\`--daemon' option detected \
			on /etc/default/boinc-client, this \
			can cause problems on boinc. The option \
			will be suppressed"
		BOINC_OPTS=`echo "$BOINC_OPTS" | sed 's/--daemon//g'`
fi

PIDFILE=/var/run/boinc.pid
DESC="BOINC core client"
NAME=`basename $BOINC_CLIENT`
BOINC_OPTS="--check_all_logins --redirectio --dir $BOINC_DIR $BOINC_OPTS"

is_running()
{
  retval=1
  if [ -r $PIDFILE ]; then
    pid=`cat $PIDFILE`
    if [ -e /proc/$pid ]; then
      procname=`/bin/ps h -p $pid`
      [ -n "$procname" ] && retval=0
    fi
  fi
  return $retval
}

start()
{
  log_begin_msg "Starting $DESC: $NAME"
  if is_running; then
    log_progress_msg "already running"
  else
    if [ -n "$DISPLAY" -a -x /usr/bin/xhost ]; then
       # grant the boinc client to perform GPU computing
       xhost +si:localuser:$BOINC_USER || echo -n "xhost error ignored, GPU computing may not be possible"
    fi
    if [ -n "$VALGRIND_OPTIONS" ]; then
      start-stop-daemon --start --quiet --background --pidfile $PIDFILE \
         --make-pidfile --user $BOINC_USER --chuid $BOINC_USER \
         --chdir $BOINC_DIR --exec /usr/bin/valgrind -- $VALGRIND_OPTIONS $BOINC_CLIENT $BOINC_OPTS
    else
      start-stop-daemon --start --quiet --background --pidfile $PIDFILE \
         --make-pidfile --user $BOINC_USER --chuid $BOINC_USER \
         --chdir $BOINC_DIR --exec $BOINC_CLIENT -- $BOINC_OPTS
    fi
  fi
  log_end_msg 0

  if [ "$SCHEDULE" = "1" ]; then
    schedule
  fi
}

stop()
{
  log_begin_msg "Stopping $DESC: $NAME"
  if ! is_running; then
    log_progress_msg "not running"
  else
    start-stop-daemon --stop --quiet --oknodo --pidfile $PIDFILE \
      --user $BOINC_USER --exec $BOINC_CLIENT

		# Wait until really stopped - $pid is set from is_running
		# (waiting for max 60s (600 cycles at 100ms))
		i=0
		while kill -0 "$pid" 2> /dev/null;  do
			if [ $i = '600' ]; then
				break;
			else
				if [ $i = '0' ]; then
					echo -n " ... waiting "
				elif [ $(($i%10)) = 0 ]; then
					echo -n "."
				fi
				i=$(($i+1))
				sleep .1
			fi
		done
  fi

  rm -f "$BOINC_DIR/lockfile"
  rm -f $PIDFILE
  log_end_msg 0
}

chrt_many()
{
   POLICY="$1"
   PRIO="$2"
   NICE="$3"
   shift 3
   for i in "$@"; do
     chrt -p $POLICY $PRIO $i || return
     # increasing compatibility with older versions of renice
     # in reaction to bug report #600134
     renice $NICE -p $i > /dev/null || renice -n $NICE -p $i
   done
}

schedule()
{
  log_begin_msg "Setting up scheduling for $DESC and children:"
  if ! is_running; then
    log_progress_msg "$NAME not running"
  else
    if [ ! -x "`which ionice 2>/dev/null`" ]; then
      log_progress_msg "ionice not found,"
    else
      if ionice -c $BOINC_IONICE_CLIENT -p $pid 2>/dev/null; then
        log_progress_msg "idle,"
      else
        log_progress_msg "ionice failed,"
      fi
    fi

    children=`ps --ppid $pid -o pid= | tr '\n' ' '`

    if [ ! -x "`which chrt 2>/dev/null`" ]; then
      log_progress_msg "chrt not found"
    else
      # BOINC client needs higher priority than scientific apps
      renice $BOINC_NICE_CLIENT -p $pid > /dev/null || renice -n $BOINC_NICE_CLIENT -p $pid
      # Apps receive minimal priority
      if [ -n "$children" ]; then
        (chrt_many --idle 0 $BOINC_NICE_APP_DEFAULT $children >/dev/null \
          && log_progress_msg "idleprio") || \
        (chrt_many --batch 0 $BOINC_NICE_APP_DEFAULT $children >/dev/null \
          && log_progress_msg "batch") || \
        (chrt_many --other 0 $BOINC_NICE_APP_DEFAULT $children >/dev/null \
          && log_progress_msg "normal") || \
        log_progress_msg "chrt failed"
      fi
    fi
    for BPID in ${pid} ${children}; do
      # Fallback to old oom_adj if oom_score_adj doesn't exist
      if [ -w /proc/${BPID}/oom_score_adj ]; then
        echo ${BOINC_OOM_SCORE_ADJ} > /proc/${BPID}/oom_score_adj 2>/dev/null || true
      elif [ -w /proc/${BPID}/oom_adj ]; then
        echo ${BOINC_OOM_ADJ} > /proc/${BPID}/oom_adj 2>/dev/null || true
      else
        echo "Could not adjust oom_score of task"
      fi
    done
  fi
  log_end_msg 0
}

status()
{
  STATUS="Status of $DESC:"
  if is_running; then
    log_success_msg "$STATUS running"
    children=`ps --ppid $pid -o pid= | tr '\n' ' '`
    if [ -x "`which chrt 2>/dev/null`" ]; then
      log_success_msg "Scheduling of $DESC: $pid"
      chrt -p $pid

      if [ -n "$children" ]; then
        log_success_msg "Scheduling of $DESC's children: $children"
        for i in $children; do
          chrt -p $i
        done
      fi
    fi
    log_success_msg "OOM killer status for $DESC:"
    for BPID in ${pid} ${children}; do
      echo -n "PID ${BPID}: "
      if [ ! -d "/proc/${BPID}" ]; then
        echo "/proc/${BPID} not found"
        continue
      fi

      echo -n "adj "
      if [  -r "/proc/${BPID}/oom_adj" ]; then
        cat /proc/${BPID}/oom_adj
      else 
        echo "?"
      fi
      echo ", score "

      if [  -r "/proc/${BPID}/oom_adj" ]; then
        cat /proc/${BPID}/oom_score
      else
        echo -n "?"
      fi

      echo
    done

    # Display $BOINC_USER's cpu_share:
    uid=`id -u $BOINC_USER`
    cpu_share_file="/sys/kernel/uids/$uid/cpu_share"
    if [ -f "$cpu_share_file" ]; then
      log_success_msg "cpu_share: `cat "$cpu_share_file"`"
    fi
  else
    log_success_msg "$STATUS stopped"
  fi
}

case "$1" in
  start)
    start
    ;;

  stop)
    stop
    ;;

  restart|force-reload)
    stop
    sleep 1
    start
    ;;

  status)
    status
    ;;

  schedule)
    schedule
    ;;

  *)
    log_success_msg "Usage: $0 {start|stop|restart|force-reload|status|schedule}" >&2
    exit 1
    ;;
esac

exit 0

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