/etc/init.d/apache2 (new server)

#!/bin/sh
### BEGIN INIT INFO
# Provides:          apache2
# Required-Start:    $local_fs $remote_fs $network $syslog $named
# Required-Stop:     $local_fs $remote_fs $network $syslog $named
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# X-Interactive:     true
# Short-Description: Apache2 web server
# Description:       Start the web server and associated helpers
#  This script will start apache2, and possibly all associated instances.
#  Moreover, it will set-up temporary directories and helper tools such as
#  htcacheclean when required by the configuration.
### END INIT INFO

DESC="web server"
NAME=apache2
DAEMON=/usr/sbin/$NAME

SCRIPTNAME="${0##*/}"
SCRIPTNAME="${SCRIPTNAME##[KS][0-9][0-9]}"
if [ -n "$APACHE_CONFDIR" ] ; then
    if [ "${APACHE_CONFDIR##/etc/apache2-}" != "${APACHE_CONFDIR}" ] ; then
            DIR_SUFFIX="${APACHE_CONFDIR##/etc/apache2-}"
    else
            DIR_SUFFIX=
    fi
elif [ "${SCRIPTNAME##apache2-}" != "$SCRIPTNAME" ] ; then
    DIR_SUFFIX="-${SCRIPTNAME##apache2-}"
    APACHE_CONFDIR=/etc/apache2$DIR_SUFFIX
else
    DIR_SUFFIX=
    APACHE_CONFDIR=/etc/apache2
fi
if [ -z "$APACHE_ENVVARS" ] ; then
    APACHE_ENVVARS=$APACHE_CONFDIR/envvars
fi
export APACHE_CONFDIR APACHE_ENVVARS

ENV="env -i LANG=C PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
if [ "$APACHE_CONFDIR" != /etc/apache2 ] ; then
    ENV="$ENV APACHE_CONFDIR=$APACHE_CONFDIR"
fi
if [ "$APACHE_ENVVARS" != "$APACHE_CONFDIR/envvars" ] ; then
    ENV="$ENV APACHE_ENVVARS=$APACHE_ENVVARS"
fi


#edit /etc/default/apache2 to change this.
HTCACHECLEAN_RUN=auto
HTCACHECLEAN_MODE=daemon
HTCACHECLEAN_SIZE=300M
HTCACHECLEAN_DAEMON_INTERVAL=120
HTCACHECLEAN_PATH=/var/cache/apache2$DIR_SUFFIX/mod_cache_disk
HTCACHECLEAN_OPTIONS=""

# Read configuration variable file if it is present
if [ -f /etc/default/apache2$DIR_SUFFIX ] ; then
    . /etc/default/apache2$DIR_SUFFIX
elif [ -f /etc/default/apache2 ] ; then
    . /etc/default/apache2
fi

PIDFILE=$(. $APACHE_ENVVARS && echo $APACHE_PID_FILE)

VERBOSE=no
if [ -f /etc/default/rcS ]; then
    . /etc/default/rcS
fi
. /lib/lsb/init-functions


# Now, set defaults:
APACHE2CTL="$ENV apache2ctl"
HTCACHECLEAN="$ENV htcacheclean"
PIDFILE=$(. $APACHE_ENVVARS && echo $APACHE_PID_FILE)
APACHE2_INIT_MESSAGE=""

CONFTEST_OUTFILE=
cleanup() {
    if [ -n "$CONFTEST_OUTFILE" ] ; then
        rm -f "$CONFTEST_OUTFILE"
    fi
}
trap cleanup 0  # "0" means "EXIT", but "EXIT" is not portable


apache_conftest() {
    [ -z "$CONFTEST_OUTFILE" ] || rm -f "$CONFTEST_OUTFILE"
    CONFTEST_OUTFILE=$(mktemp)
    if ! $APACHE2CTL configtest > "$CONFTEST_OUTFILE" 2>&1 ; then
        return 1
    else
        rm -f "$CONFTEST_OUTFILE"
        CONFTEST_OUTFILE=
        return 0
    fi
}

clear_error_msg() {
    [ -z "$CONFTEST_OUTFILE" ] || rm -f "$CONFTEST_OUTFILE"
    CONFTEST_OUTFILE=
    APACHE2_INIT_MESSAGE=
}

print_error_msg() {
    [ -z "$APACHE2_INIT_MESSAGE" ] || log_warning_msg "$APACHE2_INIT_MESSAGE"
    if [ -n "$CONFTEST_OUTFILE" ] ; then
        echo "Output of config test was:" >&2
        cat "$CONFTEST_OUTFILE" >&2
        rm -f "$CONFTEST_OUTFILE"
        CONFTEST_OUTFILE=
    fi
}

apache_wait_start() {
    local STATUS=$1
    local i=0
    while : ; do
            PIDTMP=$(pidofproc -p $PIDFILE $DAEMON)
            if [ -n "${PIDTMP:-}" ] && kill -0 "${PIDTMP:-}" 2> /dev/null; then
                    return $STATUS
            fi

            if [ $i = "20" ] ; then
                    APACHE2_INIT_MESSAGE="The apache2$DIR_SUFFIX instance did not start within 20 seconds. Please read the log files to discover problems"
                    return 2
            fi

            [ "$VERBOSE" != no ] && log_progress_msg "."
            sleep 1
            i=$(($i+1))
    done
}

apache_wait_stop() {
    local STATUS=$1

    PIDTMP=$(pidofproc -p $PIDFILE $DAEMON)
    if [ -n "${PIDTMP:-}" ] && kill -0 "${PIDTMP:-}" 2> /dev/null; then
            local i=0
            while kill -0 "${PIDTMP:-}" 2> /dev/null;  do
                    if [ $i = '60' ]; then
                            break
                            STATUS=2
                    fi
                    [ "$VERBOSE" != no ] && log_progress_msg "."
                    sleep 1
                    i=$(($i+1))
            done
            return $STATUS
    else
        return $STATUS
    fi
}


#
# 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

    if pidofproc -p $PIDFILE "$DAEMON" > /dev/null 2>&1 ; then
            return 1
    fi

    if apache_conftest ; then
            $APACHE2CTL start
            apache_wait_start $?
            return $?
    else
            APACHE2_INIT_MESSAGE="The apache2$DIR_SUFFIX configtest failed."
            return 2
    fi
}

#
# 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

    # either "stop" or "graceful-stop"
    local STOP=$1
    # can't use pidofproc from LSB here
    local AP_RET=0

    if pidof $DAEMON > /dev/null 2>&1 ; then
            if [ -e $PIDFILE ] && pidof $DAEMON | tr ' ' '\n' | grep -w $(cat $PIDFILE) > /dev/null 2>&1 ; then
                    AP_RET=2
            else
                    AP_RET=1
            fi
    else
        AP_RET=0
    fi

    # AP_RET is:
    # 0 if Apache (whichever) is not running
    # 1 if Apache (whichever) is running
    # 2 if Apache from the PIDFILE is running

    if [ $AP_RET = 0 ] ; then
            return 1
    fi

    if [ $AP_RET = 2 ] && apache_conftest ; then
            $APACHE2CTL $STOP > /dev/null 2>&1
            apache_wait_stop $?
            return $?
    else
            if [ $AP_RET = 2 ]; then
                    clear_error_msg
                    APACHE2_INIT_MESSAGE="The apache2$DIR_SUFFIX configtest failed, so we are trying to kill it manually. This is almost certainly suboptimal, so please make sure your system is working as you'd expect now!"
                    killproc -p $PIDFILE $DAEMON
                    apache_wait_stop $?
                    return $?
            elif [ $AP_RET = 1 ] ; then
                    APACHE2_INIT_MESSAGE="There are processes named 'apache2' running which do not match your pid file which are left untouched in the name of safety, Please review the situation by hand".
                    return 2
            fi
    fi

}


#
# Function that sends a SIGHUP to the daemon/service
#
do_reload() {
    if apache_conftest; then
            if ! pidofproc -p $PIDFILE "$DAEMON" > /dev/null 2>&1 ; then
                    APACHE2_INIT_MESSAGE="Apache2 is not running"
                    return 2
            fi
            $APACHE2CTL graceful > /dev/null 2>&1
            return $?
    else
            APACHE2_INIT_MESSAGE="The apache2$DIR_SUFFIX configtest failed. Not doing anything."
            return 2
    fi
}


check_htcacheclean() {
    [ "$HTCACHECLEAN_MODE" = "daemon" ] || return 1
    [ "$HTCACHECLEAN_RUN"  = "yes"    ] && return 0

    MODSDIR=$(. $APACHE_ENVVARS && echo $APACHE_MODS_ENABLED)
            [ "$HTCACHECLEAN_RUN"  = "auto" \
                    -a -e ${MODSDIR:-$APACHE_CONFDIR/mods-enabled}/cache_disk.load ] && \
                    return 0
    return 1
}

start_htcacheclean() {
       $HTCACHECLEAN $HTCACHECLEAN_OPTIONS -d$HTCACHECLEAN_DAEMON_INTERVAL \
            -i -p$HTCACHECLEAN_PATH -l$HTCACHECLEAN_SIZE
}

stop_htcacheclean() {
    pkill -P 1 -f "htcacheclean.* -p$HTCACHECLEAN_PATH " 2> /dev/null || return 1
}


# Sanity checks. They need to occur after function declarations
[ -x $DAEMON ] || exit 0

if [ ! -x $DAEMON ] ; then
    echo "No apache-bin package installed"
    exit 0
fi

if [ -z "$PIDFILE" ] ; then
    echo ERROR: APACHE_PID_FILE needs to be defined in $APACHE_ENVVARS >&2
    exit 2
fi

if check_htcacheclean ; then
    if [ ! -d "$HTCACHECLEAN_PATH" ] ; then
            echo "htcacheclean is configured, but directory $HTCACHECLEAN_PATH does not exist!" >&2
            exit 2
    fi
fi



case "$1" in
  start)
    log_daemon_msg "Starting $DESC" "$NAME"
    do_start
    RET_STATUS=$?
    case "$RET_STATUS" in
        0|1)
            log_success_msg
            [ "$VERBOSE" != no ] && [ $RET_STATUS = 1 ] && log_warning_msg "Server was already running"
            if check_htcacheclean ; then
                [ "$VERBOSE" != no ] && log_daemon_msg "Starting HTTP cache cleaning daemon" "htcacheclean"
                start_htcacheclean
                [ "$VERBOSE" != no ] && log_end_msg $?
            fi
            ;;
        2)
            log_failure_msg
            print_error_msg
            exit 1
            ;;
    esac
    ;;
  stop|graceful-stop)
    log_daemon_msg "Stopping $DESC" "$NAME"
    do_stop "$1"
    RET_STATUS=$?
    case "$RET_STATUS" in
        0|1)
            log_success_msg
            [ "$VERBOSE" != no ] && [ $RET_STATUS = 1 ] && log_warning_msg "Server was not running"
            ;;
        2)
            log_failure_msg
            print_error_msg
            exit 1
            ;;
    esac
    print_error_msg

    if check_htcacheclean ; then
        [ "$VERBOSE" != no ] && log_daemon_msg "Stopping HTTP cache cleaning daemon" "htcacheclean"
        stop_htcacheclean
        [ "$VERBOSE" != no ] && log_end_msg $?
    fi

    ;;
  status)
    status_of_proc -p $PIDFILE "apache2" "$NAME"
    exit $?
    ;;
  reload|force-reload|graceful)
    log_daemon_msg "Reloading $DESC" "$NAME"
    do_reload
    RET_STATUS=$?
    case "$RET_STATUS" in
        0|1)
            log_success_msg
            [ "$VERBOSE" != no ] && [ $RET_STATUS = 1 ] && log_warning_msg "Server was already running"
            ;;
        2)
            log_failure_msg
            print_error_msg
            exit 1
            ;;
    esac
    print_error_msg
    ;;
  restart)
    log_daemon_msg "Restarting $DESC" "$NAME"
    do_stop stop
    case "$?" in
        0|1)
            do_start
            case "$?" in
                0)
                    log_end_msg 0
                    ;;
                1|*)
                    log_end_msg 1 # Old process is still or failed to running
                    print_error_msg
                    exit 1
                    ;;
            esac
            ;;
        *)
            # Failed to stop
            log_end_msg 1
            print_error_msg
            exit 1
            ;;
    esac
    ;;
  start-htcacheclean)
    log_daemon_msg "Starting htcacheclean"
    start_htcacheclean
    log_end_msg $?
    exit $?
    ;;
  stop-htcacheclean)
    log_daemon_msg "Stopping htcacheclean"
    stop_htcacheclean
    log_end_msg $?
    exit $?
    ;;
  *)
    echo "Usage: $SCRIPTNAME {start|stop|graceful-stop|restart|reload|force-reload|start-htcacheclean|stop-htcacheclean}" >&2
    exit 3
    ;;
esac

exit 0

# vim: syntax=sh ts=4 sw=4 sts=4 sr noet