#!/bin/bash
#
# Startup script for the Apache Web Server
#
# chkconfig: 345 92 8
# description: Apache is a World Wide Web server. It is used to serve \
#	       HTML files and CGI.
# processname: httpd
# pidfile: /var/run/httpd.pid

### BEGIN INIT INFO
# Provides: httpd
# Required-Start: $network $mysqld $postgresql $radiusd $ldap
# Requires-Stop: $network $mysqld $postgresql $radiusd $ldap
# Default-Start: 3 4 5
# Short-Description: The Apache Web Server.
# Description: Apache is a World Wide Web server. It is used to serve
#	       HTML files and CGI.
### END INIT INFO

# nuke the environment
for i in `env | sed -e '/^[[:blank:]]/d' | cut -d= -f1 | grep "[A-Z]"`; do
    unset $i;
done

# Source function library.
. /etc/rc.d/init.d/functions

# Source the /etc/sysconfig/httpd file.
if [ -f /etc/sysconfig/httpd ]; then
    . /etc/sysconfig/httpd
fi

# Start httpd in the C locale by default.
export LC_ALL=${HTTPD_LANG-"C"}
export LC_CTYPE=${HTTPD_LANG-"C"}
export LANG=${HTTPD_LANG-"C"}

# Use a safe temp directory
export TMP=${HTTPD_TMP:-"/tmp"}
export TMPDIR=${HTTPD_TMPDIR:-"/tmp"}

# Start with defaults
httpdpid=${HTTPDPID:-"/var/run/httpd.pid"}
options=${OPTIONS-""}
httpd=${HTTPD:-"/usr/sbin/httpd"}
statusurl=${STATUSURL:-"http://localhost/server-status"}

## Number of times to try to start Apache in case of error
#times_start="1 2 3"
times_start="1"
sleep_time="1 2 3 4"

# Change the major functions into functions.
moduleargs() {
	moduleargs=
	for module in $1/*.so ; do
		if [ -x ${module} ] ; then
			module=`echo ${module} | awk '{
				gsub(".*/","");
				gsub("^mod_","");
				gsub("^lib","");
				gsub(".so$","");
				print toupper($0)}'`
			moduleargs="${moduleargs} -DHAVE_$module"
		fi
	done
	echo ${moduleargs}
}

# Get the extra modules so only the main server gets them
extramoduleargs() {
	extramoduleargs=
	for extramodule in $1/*.so ; do
		if [ -x ${extramodule} ] ; then
			extramodule=`echo ${extramodule} | awk '{
				gsub(".*/","");
				gsub("^mod_","");
				gsub("^lib","");
				gsub(".so$","");
				print toupper($0)}'`
			extramoduleargs="${extramoduleargs} -DHAVE_$extramodule" 
		fi
	done
	echo ${extramoduleargs}
}

# NOTE: detect/detectlib must be call before any use of $libdir !
detectlib() {
   local is_64bit=no
   case `/usr/bin/file /bin/bash` in
   *"ELF 64"*)
     is_64bit=yes
     ;;
   esac
   libdir="/usr/lib"
   case `uname -m`:$is_64bit in
   powerpc64:yes | s390x:yes | sparc64:yes | x86_64:yes) libdir="/usr/lib64";;
   esac
}

detect() {
   detectlib
   httpdconf=${HTTPDCONF:-"-f /etc/httpd/conf/httpd.conf"}
   extramodules="-DAPACHE2 `extramoduleargs /etc/httpd/extramodules`"
   modules=`moduleargs /etc/httpd/modules`
   debug=${DEBUG:-"-DNO_DETACH -DONE_PROCESS -DDEBUG"}
}

## Hack for ApacheJServ that takes forever to shut down and restart
snooze() {
	for count in 1 2 3 4 5 6 7 8 9 ; do echo "."; sleep 1; done
	echo
}

conftest() {
        detect
	badconf=0
	if [ -x $httpd ]; then
		action "Checking configuration sanity for apache: " \
			$httpd -t $httpdconf $extramodules $modules $options
		badconf=$?
	fi
	return $badconf
}

conftest_vhosts() {
        detect
	badconf=0
	if [ -x $httpd ]; then
		action "Checking configuration sanity for apache: " \
			$httpd -t $httpdconf $extramodules $modules $options -D DUMP_VHOSTS
		badconf=$?
	fi
	return $badconf
}

sanitizer() {
	# OE: 20040515 delete corrupt files
	ssl_scache_file="/var/cache/httpd/mod_ssl/ssl_scache"
	if [ -f "$ssl_scache_file" ]; then
	    echo "Unclean shutdown detected, $ssl_scache_file exists and is probably corrupted, deleting..."
		rm -f "$ssl_scache_file"
	    echo
	fi
}

semdetect() {
	# OE: 20040609 detect dead semaphores
	apache_semid=`ipcs -s|grep apache|grep '^0x00000000'|awk '{ print $2 }'`
	if ! [ -z "$apache_semid" ]; then
	    number_of_dead_semid=`echo $apache_semid|wc -w`
	    echo "Unclean shutdown detected/something made apache segfault leaving $number_of_dead_semid possible dead semaphores (arrays)."
	    echo "A possible solution could be to tune the kernel using sysctl, check these values:"
	    echo "kernel.shmall, kernel.shmmax, kernel.shmmni, kernel.sem and kernel.msgmni"
	    echo "You may have to start apache with the \"semcleanrestart\" switch."
	fi
}

semkill() {
	# OE: 20040609 kill dead semaphores
	# OE: 20040610 ipcclean from the postgresql-server package does a much nicer job,
	# should we use that one instead?
	apache_semid=`ipcs -s|grep apache|grep '^0x00000000'|awk '{ print $2 }'`
	if ! [ -z "$apache_semid" ]; then
	    echo -n "Killing semid: "
		for dead_semid in $apache_semid; do
		    ipcrm -s $dead_semid; echo -n "$dead_semid "
		done
	    echo
	fi
}

# check for 2.2 configuration
check22() {
	HTTPD_ROOT=`$httpd -V | grep HTTPD_ROOT | cut -d\" -f2`
	CONFFILES=`find $HTTPD_ROOT/modules.d $HTTPD_ROOT/conf.d $HTTPD_ROOT/conf/webapps.d $HTTPD_ROOT/conf/vhosts.d -name '*.conf'`
	HTTPD_CONFFILE=`echo $httpdconf | sed -e 's/-f//'`
	GONE="(mod_access.c|mod_auth.c|mod_auth_ldap.c|mod_imap.c)"
	if LANG=C grep -HEin "[[:space:]]*($GONE)" $CONFFILES $HTTPD_CONFFILE ; then
		echo
		echo 1>&2 " Obsolete apache 2.0 configuration directives were found as shown above designated by filename:line number:directive."
		echo 1>&2 " Please read the /usr/share/doc/apache-base-*/new_features*.txt, /usr/share/doc/apache-conf-*/README.urpmi file and"
		echo 1>&2 " the online apache 2.2 documentation at http://httpd.apache.org/docs/2.2/"
		echo 1>&2 " The following example statement does not work with apache 2.2.0:"
		echo 1>&2 ""
		echo 1>&2 " <Directory /my/secure/files>"
		echo 1>&2 "   Options -All -Multiviews"
		echo 1>&2 "   AllowOverride None"
		echo 1>&2 "   <IfModule mod_access.c> <- REMOVE THIS LINE"
		echo 1>&2 "     Order deny,allow"
		echo 1>&2 "     Deny from all"
		echo 1>&2 "   </IfModule>             <- REMOVE THIS LINE"
		echo 1>&2 " </Directory>"
		echo 1>&2 ""
		failure "Apache 2.0 config directives test"
		echo
		exit 1
	fi
}

RETVAL=0

# See how we were called.
case "$1" in
  start)
	# set safe temp
	for tries in $times_start; do
	  if [ -x $httpd -a ! -e $httpdpid ]; then 
		if [ $tries -eq 1 ]; then echo -n "Starting httpd: "; fi
		check22 || exit 1
		detect; sanitizer; semdetect
		$httpd $httpdconf $extramodules $modules $options && success || failure
		RETVAL=$?
		echo
		if [ $RETVAL -eq 0 ]; then
		    for wait in $sleep_time; do
			if [ ! -e $httpdpid ]; then sleep 1; fi
		    done
		fi
		[ $RETVAL -eq 0 ] && touch /var/lock/subsys/httpd
	  fi
	done
	;;
  stop)
	if [ -e $httpdpid ]; then 
		echo -n "Shutting down httpd: "
		killproc httpd
		if [ -e $libdir/apache-extramodules/mod_jserv.so ]; then
			snooze
			while [ -e $httpdpid ]; do
				echo "Trying harder"
				snooze
				killproc httpd
			done
		fi
	fi
	RETVAL=$?
	echo
	[ $RETVAL -eq 0 ] && rm -f /var/lock/subsys/httpd $httpdpid
	;;
  debug)
	echo -n "Starting httpd (debug mode and in the foreground): "
	detect
	$httpd $httpdconf $debug \
	    -c "Pidfile /tmp/httpd-debug.pid" \
	    -c "LogLevel debug" \
	    -c "ErrorLog /dev/stdout" \
	    -c "CustomLog /dev/stdout common" \
	    $extramodules $modules $options
	RETVAL=$?
	echo
	[ $RETVAL -eq 0 ] && rm -f /var/lock/subsys/httpd /tmp/httpd-debug.pid
	;;
  extendedstatus)
        detect
	if [ -e $httpdpid ]; then 
	    lynx -dump $statusurl | awk ' /process$/ { print; exit } { print } '
	    echo
	    echo "#######################################"
	    echo "#######################################"
	fi
	if [ ! -e $httpdpid ]; then	
		echo "Apache is *not* running."
		echo
		RETVAL=3
	fi
	;;
  status)
        detect
	if [ -e $httpdpid ]; then 
		echo "Apache is running."
		echo "httpd: `pidof httpd`"
		echo
	fi
	if [ ! -e $httpdpid ]; then	
		echo "Apache is *not* running."
		echo
		RETVAL=3
	fi
	echo "Use $0 extendedstatus for more information."
	echo
	;;
  restart)
	$0 stop
	$0 start
	RETVAL=$?
	;;
  update|condrestart)
	if [ -e $httpdpid ]; then
	    $0 stop
	    conftest || exit $?
	    $0 start
	    RETVAL=$?
	fi
	;;
  reload|graceful|condreload)
	# in doubt, check both possible library dirs
	if [ -e $libdir/apache-extramodules/mod_jserv.so ]; then
	    $0 stop
	    $0 start
	else
                detect
		if [ -e $httpdpid ]; then 
			echo -n "Reloading httpd: "
			killproc httpd -USR1
			echo
		fi
	fi
	;;
  closelogs)
        detect
	if [ -e $httpdpid ]; then 
		echo -n "Sending HUP to httpd: "
		killproc httpd -HUP
		echo
	fi
	;;
  configtest)
        conftest
	exit $?
	;;
  configtest_vhosts)
        conftest_vhosts
	exit $?
	;;
  show_defines)
	# OE 20041013 make it spit out all those -D variables to make it
	# easier to use something like:
	# httpd -f /etc/httpd/conf/httpd.conf `/etc/rc.d/init.d/httpd define` -t
        detect
	echo "$extramodules $modules $options"
	exit $?
	;;
  semcleanrestart)
	if ! [ -e $httpdpid ]; then
	    semkill; detect; stop; detect; start
	fi
	;;
  *)
	echo "Usage: $0 {start|stop|restart|reload|graceful|condreload|closelogs|update|condrestart|status|extendedstatus|configtest|configtest_vhosts|semcleanrestart|debug|show_defines}"
	exit 1
esac

exit $RETVAL