#!/bin/bash
#
# --- BEGIN COPYRIGHT BLOCK ---
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation;
# version 2.1 of the License.
# 
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# Lesser General Public License for more details.
# 
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor,
# Boston, MA  02110-1301  USA 
# 
# Copyright (C) 2007 Red Hat, Inc.
# All rights reserved.
# --- END COPYRIGHT BLOCK ---
#
#
# [INSTANCE_ID]    Startup script for the Apache HTTP Server
#
# chkconfig:    - 85 15
# description:  Apache is a World Wide Web server.  It is used to serve \
#               HTML files and CGI.
# processname:  httpd
# config:       [HTTPD_CONF]
# pidfile:      [SERVER_ROOT]/logs/[INSTANCE_ID].pid

# Check to insure that this script's original invocation directory
# has not been deleted!
CWD=`/bin/pwd > /dev/null 2>&1`
if [ $? -ne 0 ] ; then
	echo "Cannot invoke '$0' from non-existent directory!"
	exit 255
fi

# Check to insure that at least one PKI subsystem
# currently resides on this system.
if	[ ! -x /usr/bin/pkiarch   ] ||
	[ ! -x /usr/bin/pkiflavor ] ||
	[ ! -x /usr/bin/pkiname   ]; then
	echo "This machine is missing all PKI subsystems!"
	exit 255
fi

# Check to insure that this script's associated PKI
# subsystem currently resides on this system.
SUBSYSTEM_TYPE=[SUBSYSTEM_TYPE]
if [ ! -d /usr/share/`pkiflavor`/${SUBSYSTEM_TYPE} ] ; then
	echo "This machine is missing the '${SUBSYSTEM_TYPE}' subsystem!"
	exit 255
fi

# Obtain the operating system upon which this script is being executed
OS=`pkiname`
ARCHITECTURE=`pkiarch`

# Time to wait in seconds, before killing process
#
#     NOTE:  Defined in "tomcat5.conf" for other PKI Subsystems.
#
STARTUP_WAIT=30
SHUTDOWN_WAIT=30

# This script must be run as root!
RV=0
if [ ${OS} = "Linux" ] ; then
	if [ `id -u` -ne 0 ] ; then
		echo "Must be 'root' to execute '$0'!"
		exit 1
	fi
elif [ ${OS} = "SunOS" ] ; then
	if [ `/usr/xpg4/bin/id -u` -ne 0 ] ; then
		echo "Must be 'root' to execute '$0'!"
		exit 1
	fi
else
	echo "Unsupported OS '${OS}'!"
	exit 1
fi

# Initialize environment variables
LD_LIBRARY_PATH=[SYSTEM_USER_LIBRARIES]:[SYSTEM_LIBRARIES]:${LD_LIBRARY_PATH}
LD_LIBRARY_PATH=[SECURITY_LIBRARIES]:${LD_LIBRARY_PATH}
export LD_LIBRARY_PATH

# Source function library.
if [ -x /etc/init.d/functions ]; then
	. /etc/init.d/functions
else
	# The checkpid() function is provided for platforms that do not
	# contain the "/etc/init.d/functions" file (e. g. - Solaris) . . .

	# Check if $pid (could be plural) are running (keep count)
	checkpid()
	{
		rv=0
		for i in $* ; do
			ps -p $i > /dev/null 2>&1 ;
			if [ $? -ne 0 ] ; then
				rv=`expr $rv + 1`
			else
				rv=`expr $rv + 0`
			fi
		done
		# echo "rv=$rv"
		return $rv
	}

	# Create the following directories on platforms
	# where they do not exist (e. g. - Solaris) . . .
	if [ ! -d /var/lock/subsys ] ; then
		mkdir -p /var/lock/subsys
	fi
fi

########################################################################
#   This section contains modified content of "/etc/sysconfig/httpd"   #
########################################################################
# Configuration file for the [INSTANCE_ID] service.

#
# The default processing model (MPM) is the process-based
# 'prefork' model.  A thread-based model, 'worker', is also
# available, but does not work with some modules (such as PHP).
# The service must be stopped before changing this variable.
#
HTTPD=[FORTITUDE_DIR]/sbin/httpd.worker

#
# To pass additional options (for instance, -D definitions) to the
# httpd binary at startup, set OPTIONS here.
#
OPTIONS="-f [HTTPD_CONF]"

#
# By default, the httpd process is started in the C locale; to 
# change the locale in which the server runs, the HTTPD_LANG
# variable can be set.
#
HTTPD_LANG=C
########################################################################
#                                                                      #
########################################################################

# This will prevent initlog from swallowing up a pass-phrase prompt if
# mod_ssl needs a pass-phrase from the user.
INITLOG_ARGS=""

# Set HTTPD=/usr/sbin/httpd.worker in /etc/sysconfig/httpd to use a server
# with the thread-based "worker" MPM; BE WARNED that some modules may not
# work correctly with a thread-based MPM; notably PHP will refuse to start.

# Path to the server binary and short-form for messages.
httpd=${HTTPD:-[FORTITUDE_DIR]/sbin/httpd}
prog=[INSTANCE_ID]
pidfile=${PIDFILE:-[SERVER_ROOT]/logs/[INSTANCE_ID].pid}
lockfile=${LOCKFILE:-/var/lock/subsys/[INSTANCE_ID]}
RETVAL=0

# see if httpd is linked with the openldap libraries - we need to override them
if [ ${OS} = "Linux" ]; then
	hasopenldap=0

	/usr/bin/ldd $httpd 2>&1 | grep libldap- > /dev/null 2>&1 && hasopenldap=1

	if [ $hasopenldap -eq 1 ] ; then
		LD_PRELOAD="[SYSTEM_USER_LIBRARIES]/libldap60.so"
		LD_PRELOAD="[SYSTEM_USER_LIBRARIES]/libssl3.so:${LD_PRELOAD}"
		export LD_PRELOAD
	fi
elif [ ${OS} = "SunOS" ] ; then
	LD_PRELOAD_64="[SYSTEM_USER_LIBRARIES]/libldap60.so"
	LD_PRELOAD_64="[SYSTEM_USER_LIBRARIES]/libssl3.so:${LD_PRELOAD_64}"
	export LD_PRELOAD_64
fi

get_pki_secure_port()
{
	# establish well-known strings
	listen_statement="Listen"

	# first check to see that an instance-specific "nss.conf" file exists
	if [ ! -f [NSS_CONF] ] ; then
		echo "File '[NSS_CONF]' does not exist!"
		exit 255
	fi

	# read this instance-specific "nss.conf" file line-by-line
	# to obtain the current value of the PKI secure port
	exec < [NSS_CONF]
	while read line; do
		# look for the listen statement
		head=`echo $line | cut -b1-6`
		if [ "$head" == "$listen_statement" ] ; then
			# once the listen statement has been found,
			# extract the numeric port information
			port=`echo $line | cut -d: -f2`
			SECURE_PORT=$port
			return 0
		fi
	done

	return 255
}

# The semantics of these two functions differ from the way apachectl does
# things -- attempting to start while running is a failure, and shutdown
# when not running is also a failure.  So we just do it the way init scripts
# are expected to behave here.
start() {
	echo -n $"Starting $prog: "

	if [ -f ${lockfile} ] ; then
		if [ -f ${pidfile} ]; then
			read kpid < ${pidfile}
			if checkpid $kpid 2>&1; then
				echo
				echo "process already running"
				return -1
			else
				echo
				echo -n "lock file found but no process "
				echo -n "running for pid $kpid, continuing"
				echo
				echo
			fi
		fi
	fi

	if [ -x /etc/init.d/functions ]; then
		/usr/sbin/selinuxenabled
		RETVAL=$?
		if [ $RETVAL = 0 ] ; then	
			# start Apache in unconfined mode in SELinux-enabled RHEL4
			if [ ${ARCHITECTURE} = "i386" ] ; then
				LANG=$HTTPD_LANG daemon runcon -t unconfined_t -- $httpd $OPTIONS
				# overwrite output from "daemon"
				echo -n $"Starting $prog:                                        "
			elif [ ${ARCHITECTURE} = "x86_64" ] ; then
				# NOTE:  "daemon" is incompatible with "httpd"
				#        on 64-bit architectures
				LANG=$HTTPD_LANG runcon -t unconfined_t -- $httpd $OPTIONS
			fi
		else
			LANG=$HTTPD_LANG daemon $httpd $OPTIONS
			# overwrite output from "daemon"
			echo -n $"Starting $prog:                                        "
		fi
	else
		LANG=$HTTPD_LANG $httpd $OPTIONS -k start
	fi

	RETVAL=$?
	[ $RETVAL = 0 ] && touch ${lockfile}

	if [ $RETVAL = 0 ] ; then
		count=0;

		let swait=$STARTUP_WAIT
		until	[ ! -s ${pidfile} ] ||
				[ $count -gt $swait ]
		do
			sleep 1
			let count=$count+1;
		done

		if [ -x /etc/init.d/functions ]; then
			echo_success > /etc/rhgb/temp/rhgb-console
			cat /etc/rhgb/temp/rhgb-console
			echo
		else
			echo "                                       [  OK  ]"
		fi

		get_pki_secure_port
		if [ $? -ne 0 ] ; then
			SECURE_PORT="<Port Undefined>"
		fi

		echo
		echo -n "PKI service(s) are available at "
		echo -n "https://[SERVER_NAME]:$SECURE_PORT"
		echo
		echo
	else
		if [ -x /etc/init.d/functions ]; then
			echo_failure > /etc/rhgb/temp/rhgb-console
			cat /etc/rhgb/temp/rhgb-console
			echo
		else
			echo "                                       [  FAILED  ]"
		fi
	fi

	if [ ${OS} = "Linux" ] ; then
		sleep 5
	elif [ ${OS} = "SunOS" ] ; then
		sleep 20
	fi
	return $RETVAL
}

stop() {
	echo -n "Stopping $prog: "

	if [ -f ${lockfile} ] ; then
		$httpd $OPTIONS -k stop

		RETVAL=$?

		if [ $RETVAL = 0 ]; then
			count=0;

			if [ -f ${pidfile} ]; then
				read kpid < ${pidfile}
				let kwait=$SHUTDOWN_WAIT

				until	[ `ps -p $kpid | grep -c $kpid` = '0' ] ||
						[ $count -gt $kwait ]
				do
					sleep 1
					let count=$count+1;
				done

				if [ $count -gt $kwait ]; then
					kill -9 $kpid
				fi
			fi

			rm -f ${lockfile}
			rm -f ${pidfile}

			if [ -x /etc/init.d/functions ]; then
				echo_success > /etc/rhgb/temp/rhgb-console
				cat /etc/rhgb/temp/rhgb-console
				echo
			else
				echo "                                       [  OK  ]"
			fi
		else
			if [ -x /etc/init.d/functions ]; then
				echo_failure > /etc/rhgb/temp/rhgb-console
				cat /etc/rhgb/temp/rhgb-console
				echo
			else
				echo "                                       [  FAILED  ]"
			fi
		fi
	else
		echo
		echo "process already stopped"
	fi
}

reload() {
	echo -n $"Reloading $prog: "

	if ! LANG=$HTTPD_LANG $httpd $OPTIONS -t >&/dev/null; then
		RETVAL=$?
		echo $"not reloading due to configuration syntax error"
		if [ -x /etc/init.d/functions ]; then
			failure $"not reloading $httpd due to configuration syntax error"
		else
			echo $"not reloading $httpd due to configuration syntax error"
		fi
	else
		if [ -x /etc/init.d/functions ]; then
			killproc $httpd -HUP
			# overwrite output from "killproc"
			echo -n $"Stopping $prog:                                        "
		else
			if [ -f ${lockfile} ] ; then
				if [ -f ${pidfile} ]; then
					read kpid < ${pidfile}
					if checkpid $kpid 2>&1; then
						kill -HUP $kpid
					fi
				else
					echo
					echo -n "lock file found but no process "
					echo -n "running for pid $kpid, continuing"
					echo
					echo
				fi
			fi
		fi
	fi
	echo
}

# See how we were called.
case "$1" in
	start)
		start
		;;
	stop)
		stop
		;;
	status)
		status $httpd
		RETVAL=$?
		;;
	restart)
		stop
		sleep 2
		start
		;;
	condrestart)
		if [ -f ${pidfile} ] ; then
			stop
			sleep 2
			start
		else
			echo -n "Unable to restart process since "
			echo -n "'${pidfile}' does not exist!"
			echo
		fi
		;;
	reload)
		reload
		;;
	*)
		echo $"Usage: $prog {start|stop|restart|condrestart|reload|status|fullstatus|graceful|help|configtest}"
		exit 1
esac

exit $RETVAL