stud

#!/bin/sh

### BEGIN INIT INFO
# Provides:          stud
# Required-Start:    $remote_fs $network $local_fs
# Required-Stop:     $remote_fs $network $local_fs
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: The Scalable TLS Unwrapping Daemon
# Description:       stud is a network proxy that terminates TLS/SSL
#                    connections and forwards the unencrypted traffic
#                    to some backend.
### END INIT INFO

# Author: Christo Buschek <crito@30loops.net>
# PATH should only include /usr/* if it runs after the mountnfs.sh script

PATH=/sbin:/usr/sbin:/bin:/usr/bin
DESC=stud
NAME=stud
DAEMON=/usr/bin/stud
SCRIPTNAME=/etc/init.d/$NAME
FILES="/etc/stud/*.conf"
USER="_stud"

[ -r /etc/default/$NAME ] && . /etc/default/$NAME
[ -x $DAEMON ] || exit 0

stat -t $FILES > /dev/null 2>&1 || exit 0

. /lib/init/vars.sh
. /lib/lsb/init-functions

do_chroot() {
  oldumask=$(umask)
  umask 022
  [ -d $CHROOT ] || mkdir -p $CHROOT
  umask $oldumask
}

do_start()
{
  # Return
  #   0 if daemon has been started
  #   1 if daemon was already running
  #   2 if daemon could not be started
  do_chroot
  notfound=1
  for conf in $FILES; do
    if test -f $conf; then
      BASE=$(basename $conf)
      PIDFILE=/var/run/stud.${BASE}.pid
      . $conf
      if ! start-stop-daemon --start --quiet --pidfile $PIDFILE \
        --exec $DAEMON --test > /dev/null; then
        log_progress_msg "[Already running: ${BASE}]"
      else
        start-stop-daemon --start --quiet --pidfile $PIDFILE \
          --exec $DAEMON -b -m -- \
          $COMMON_OPTIONS $OPTIONS $CERT \
        || {
          log_progress_msg "[Failed: ${BASE}]"
          return 2
        }
        log_progress_msg "[Started: ${BASE}]"
        notfound=0
      fi
    fi
  done
  return $notfound
}

do_stop()
{
  # Return
  #   0 if daemon has been stopped
  #   1 if daemon was already stopped
  #   2 if daemon could not be stopped
  #   other if a failure occurred
  notfound=1
  notstopped=0
  for conf in $FILES; do
    if test -f $conf; then
      BASE=$(basename $conf)
      PIDFILE=/var/run/stud.${BASE}.pid
      . $conf
      start-stop-daemon --stop --quiet --retry=TERM/10/KILL/5 \
        --pidfile $PIDFILE --name $NAME
      RETVAL="$?"
      if [ "$RETVAL" = 2 ]; then
        log_progress_msg "[Unable to stop: ${BASE}]"
        notstopped=1
      else
        log_progress_msg "[Stop: ${BASE}]"
        rm -f $PIDFILE
      fi
    fi
  done
  [ $notstopped -eq 1 ] && return 2
  [ $notfound -eq 1 ] && return 1
  return 0
}

#
# Function that sends a SIGHUP to the daemon/service
#
do_reload() {
  #
  # If the daemon can reload its configuration without
  # restarting (for example, when it is sent a SIGHUP),
  # then implement that here.
  #
  start-stop-daemon --stop --signal 1 --quiet --pidfile $PIDFILE --name $NAME
  return 0
}

#
# Get the status of each daemon
#
do_status() {
  RETVAL=0
  for conf in $FILES; do
    if test -f $conf; then
      BASE=$(basename $conf)
      PIDFILE=/var/run/stud.${BASE}.pid
      . $conf
      status=0
      pidofproc -p $PIDFILE $DAEMON > /dev/null || status="$?"
      case "$status" in
        0)
          log_progress_msg "[${BASE}: ok]"
          ;;
        4)
          log_progress_msg "[${BASE}: cannot read PID file]"
          RETVAL=$status
          ;;
        *)
          log_progress_msg "[${BASE}: not running]"
          RETVAL=$status
          ;;
      esac
    fi
  done
  return $RETVAL
}
case "$1" in
  start)
   log_daemon_msg "Starting $DESC" "$NAME"
  do_start
  case "$?" in
    0|1) log_end_msg 0 ;;
    2) log_end_msg 1 ;;
  esac
  ;;
  stop)
   log_daemon_msg "Stopping $DESC" "$NAME"
  do_stop
  case "$?" in
    0|1) log_end_msg 0 ;;
    2) log_end_msg 1 ;;
  esac
  ;;
  restart|force-reload)
  #
  # If the "reload" option is implemented then remove the
  # 'force-reload' alias
  #
  log_daemon_msg "Restarting $DESC" "$NAME"
  do_stop
  case "$?" in
    0|1)
    do_start
    case "$?" in
      0) log_end_msg 0 ;;
      1) log_end_msg 1 ;; # Old process is still running
      *) log_end_msg 1 ;; # Failed to start
    esac
    ;;
    *)
      # Failed to stop
    log_end_msg 1
    ;;
  esac
  ;;
  status)
  log_daemon_msg "Checking status of $DESC" "$NAME"
        do_status
  log_end_msg "$?"
  exit "$?"
  ;;
  *)
  echo "Usage: $SCRIPTNAME {start|stop|restart|force-reload|status}" >&2
  exit 3
  ;;
esac

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