/etc/init.d/apache2 - Ubuntu 18.04 LTS (Bionic Beaver)

This is the default example configuration of apache2 provided by Apache. This config file was generated by Apache running on Ubuntu 18.04.

It is located under: /etc/init.d/apache2

    #!/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
#  This script will start the apache2 web server.
### END INIT INFO

DESC="Apache httpd 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

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="$ENV apache2ctl"
PIDFILE=$(. $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

	if [ $STATUS != 0 ] ; then
	        return $STATUS
	fi
	while : ; do
	        PIDTMP=$(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
	local METH=$2

	if [ $STATUS != 0 ] ; then
	        return $STATUS
	fi

	PIDTMP=$(pidofproc -p $PIDFILE $DAEMON)
	if [ -n "${PIDTMP:-}" ] && kill -0 "${PIDTMP:-}" 2> /dev/null; then
	        if [ "$METH" = "kill" ]; then
	            killproc -p $PIDFILE $DAEMON
	        else
	            $APACHE2CTL $METH > /dev/null 2>&1
	        fi

	        local i=0
	        while kill -0 "${PIDTMP:-}" 2> /dev/null;  do
	                if [ $i = '60' ]; then
	                        STATUS=2
	                        break
	                fi
	                [ "$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
	        apache_wait_stop $? $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!"
	                apache_wait_stop $? "kill"
	                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
}


# 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


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"
	        ;;
		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

	;;
  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|stop-htcacheclean)
	echo "Use 'service apache-htcacheclean' instead"
	;;
  *)
	echo "Usage: $SCRIPTNAME {start|stop|graceful-stop|restart|reload|force-reload}" >&2
	exit 3
	;;
esac

exit 0

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