#!/bin/sh
### BEGIN INIT INFO
# Provides:          %%PROVIDES%%
# Required-Start:    $network $remote_fs $local_fs 
# Required-Stop:     $network $remote_fs $local_fs
# Default-Start:     %%DEFAULTSTART%%
# Default-Stop:      %%DEFAULTSTOP%%
# Short-Description: Stop/start nginx
### END INIT INFO

# Author: Sergey Budnevitch <sb@nginx.com>

PATH=/sbin:/usr/sbin:/bin:/usr/bin

if [ -L $0 ]; then
    SCRIPTNAME=`/bin/readlink -f $0`
else
    SCRIPTNAME=$0
fi

sysconfig=`/usr/bin/basename $SCRIPTNAME`

[ -r /etc/default/$sysconfig ] && . /etc/default/$sysconfig

DESC=${DESC-%%PROVIDES%%}
NAME=${NAME-%%PROVIDES%%}
CONFFILE=${CONFFILE-/etc/nginx/nginx.conf}
DAEMON=${DAEMON-/usr/sbin/%%PROVIDES%%}
PIDFILE=${PIDFILE-/var/run/nginx.pid}
SLEEPSEC=1
UPGRADEWAITLOOPS=5
CHECKSLEEP=${CHECKSLEEP-3}

[ -x $DAEMON ] || exit 0

DAEMON_ARGS="-c $CONFFILE $DAEMON_ARGS"

. /lib/init/vars.sh

. /lib/lsb/init-functions

do_start()
{
    start-stop-daemon --start --quiet --pidfile $PIDFILE --exec $DAEMON -- \
        $DAEMON_ARGS
    RETVAL="$?"
    return "$RETVAL"
}

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 --oknodo --retry=TERM/30/KILL/5 --pidfile $PIDFILE
    RETVAL="$?"
    rm -f $PIDFILE
    return "$RETVAL"
}

do_reload() {
    #
    start-stop-daemon --stop --signal HUP --quiet --pidfile $PIDFILE
    RETVAL="$?"
    return "$RETVAL"
}

do_configtest() {
    if [ "$#" -ne 0 ]; then
        case "$1" in
            -q)
                FLAG=$1
                ;;
            *)
                ;;
        esac
        shift
    fi
    $DAEMON -t $FLAG -c $CONFFILE
    RETVAL="$?"
    return $RETVAL
}

do_upgrade() {
    OLDBINPIDFILE=$PIDFILE.oldbin

    do_configtest -q || return 6
    start-stop-daemon --stop --signal USR2 --quiet --pidfile $PIDFILE
    RETVAL="$?"
    
    for i in `/usr/bin/seq  $UPGRADEWAITLOOPS`; do
        sleep $SLEEPSEC
        if [ -f $OLDBINPIDFILE -a -f $PIDFILE ]; then
            start-stop-daemon --stop --signal QUIT --quiet --pidfile $OLDBINPIDFILE
            RETVAL="$?"
            return
        fi
    done

    echo $"Upgrade failed!"
    RETVAL=1
    return $RETVAL
}

do_checkreload() {
    templog=`/bin/mktemp --tmpdir nginx-check-reload-XXXXXX.log`
    trap '/bin/rm -f $templog' 0
    /usr/bin/tail --pid=$$ -n 0 --follow=name /var/log/nginx/error.log > $templog &
    /bin/sleep 1
    start-stop-daemon --stop --signal HUP --quiet --pidfile $PIDFILE
    /bin/sleep $CHECKSLEEP
    /bin/grep -E "\[emerg\]|\[alert\]" $templog
}

case "$1" in
    start)
        [ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC " "$NAME"
        do_start
        case "$?" in
            0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
            2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
        esac
        ;;
    stop)
        [ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME"
        do_stop
        case "$?" in
            0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
            2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
        esac
        ;;
  status)
        status_of_proc -p "$PIDFILE" "$DAEMON" "$NAME" && exit 0 || exit $?
        ;;
  configtest)
        do_configtest
        ;;
  upgrade)
        do_upgrade
        ;;
  reload|force-reload)
        log_daemon_msg "Reloading $DESC" "$NAME"
        do_reload
        log_end_msg $?
        ;;
  restart|force-reload)
        log_daemon_msg "Restarting $DESC" "$NAME"
        do_configtest -q || exit $RETVAL
        do_stop
        case "$?" 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
        ;;
    check-reload)
        do_checkreload
        RETVAL=0
        ;;
    *)
        echo "Usage: $SCRIPTNAME {start|stop|status|restart|reload|force-reload|upgrade|configtest|check-reload}" >&2
        exit 3
        ;;
esac

exit $RETVAL