#! /bin/sh
### BEGIN INIT INFO
# Provides:          dovecot
# Required-Start:    $local_fs $remote_fs $network $syslog $time
# Required-Stop:     $local_fs $remote_fs $network $syslog
# Should-Start:      postgresql mysql slapd winbind nslcd
# Should-Stop:       postgresql mysql slapd winbind nslcd
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Dovecot init script
# Description:       Init script for dovecot services
### END INIT INFO

# Author: Miquel van Smoorenburg <miquels@cistron.nl>.
#         Modified for Debian GNU/Linux
#         by Ian Murdock <imurdock@gnu.ai.mit.edu>.
#

# Do NOT "set -e"

# PATH should only include /usr/* if it runs after the mountnfs.sh script
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
DESC="IMAP/POP3 mail server"
NAME=dovecot
DAEMON=/usr/sbin/dovecot
DAEMON_ARGS=""
SCRIPTNAME=/etc/init.d/$NAME
CONF=/etc/dovecot/${NAME}.conf

# Read configuration variable file if it is present
[ -r /etc/default/$NAME ] && . /etc/default/$NAME

# Exit if the package is not installed
[ -x "$DAEMON" ] || exit 0

# Exit if the configuration file doesn't exist
[ -f "$CONF" ] || exit 0

# Exit if explicitly told to
[ "$ENABLED" != "0" ] || exit 0

# Allow core dumps if requested
[ "$ALLOW_COREDUMPS" != "1" ] || ulimit -c unlimited

# Define LSB log_* functions.
# Depend on lsb-base (>= 3.0-6) to ensure that this file is present.
. /lib/lsb/init-functions

# conf file readable?
if [ ! -r ${CONF} ]; then
  log_daemon_msg "${CONF}: not readable" "$NAME" && log_end_msg 1;
  exit 1;
fi

# dont check for inetd.conf if its not installed
if [ -f /etc/inetd.conf ]; then
  # The init script should do nothing if dovecot or another imap/pop3 server
  # is being run from inetd, and dovecot is configured to run as an imap or
  # pop3 service
  for p in `sed -r "s/^ *(([^:]+|\[[^]]+]|\*):)?(pop3s?|imaps?)[ \t].*/\3/;t;d" \
    /etc/inetd.conf`
  do
    for q in `doveconf -n -h protocols`
    do
      if [ $p = $q ]; then
        log_daemon_msg "protocol ${p} configured both in inetd and in dovecot" "$NAME" && log_end_msg 1
        exit 0
      fi
    done
  done
fi

# determine the location of the PID file
# override by setting base_dir in conf file or PIDBASE in /etc/defaults/$NAME
PIDBASE=${PIDBASE:-`doveconf -n -c ${CONF} -h base_dir`}
PIDFILE=${PIDBASE:-/var/run/dovecot}/master.pid

#
# Function that starts the daemon/service
#
do_start()
{
    # Return
    #   0 if daemon has been started
    #   1 if daemon was already running
    #   2 if daemon could not be started
    start-stop-daemon --start --quiet --pidfile $PIDFILE --exec $DAEMON --test -- -c ${CONF} > /dev/null \
        || return 1
    start-stop-daemon --start --quiet --pidfile $PIDFILE --exec $DAEMON -- -c ${CONF} \
        $DAEMON_ARGS \
        || return 2
}

#
# Function that stops the daemon/service
#
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
    start-stop-daemon --stop --quiet --retry=TERM/30/KILL/5 --pidfile $PIDFILE --name ${DAEMON##*/}
    RETVAL="$?"
    [ "$RETVAL" = 2 ] && return 2
    # Wait for children to finish too if this is a daemon that forks
    # and if the daemon is only ever run from this initscript.
    # If the above conditions are not satisfied then add some other code
    # that waits for the process to drop all resources that could be
    # needed by services started subsequently.  A last resort is to
    # sleep for some time.
    start-stop-daemon --stop --quiet --oknodo --retry=0/30/KILL/5 --pidfile $PIDFILE --name ${DAEMON##*/}
    [ "$?" = 2 ] && return 2
    # Many daemons don't delete their pidfiles when they exit.
    rm -f $PIDFILE
    return "$RETVAL"
}

#
# 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 HUP --quiet --pidfile $PIDFILE --name $NAME
    return 0
}


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
    ;;
  reload|force-reload)
    log_daemon_msg "Reloading $DESC" "$NAME"
    do_reload
    log_end_msg $?
    ;;
  restart)
    #
    # 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)
    status_of_proc -p $PIDFILE $DAEMON $NAME && exit 0 || exit $?
    ;;
  *)
    echo "Usage: $SCRIPTNAME {start|stop|restart|force-reload|status}" >&2
    exit 3
    ;;
esac
