#! /bin/sh
# postgresql	This is the init script for starting up the PostgreSQL
#		server
#
# chkconfig: - 85 15
# description: Starts and stops the PostgreSQL backend daemon that handles \
#	       all database requests.
# processname: postmaster
# pidfile: /var/run/postmaster.pid

# Version 6.5.3-2 Lamar Owen
# Added code to determine if PGDATA exists, whether it is current version
#     or not, and initdb if no PGDATA (initdb will not overwrite a database).

# Version 7.0 Lamar Owen
# Added logging code
# Changed PGDATA.
#

# Version 7.0.2 Trond Eivind Glomsrd 
# use functions, add conditional restart
          
# Version 7.0.3 Lamar Owen 
# Check for the existence of functions before blindly using them 
# in particular -- check for success () and failure () before using.
# More Cross-distribution support -- PGVERSION variable, and docdir checks.

# Version 7.1 Release Candidate Lamar Owen 
# initdb parameters have changed.

# Version 7.1.2 Trond Eivind Glomsrd 
# Specify shell for su
# Handle stop better - kill unwanted output, make it wait until the database is ready
# Handle locales slightly differently - always using "C" isn't a valid option 
# Kill output from database initialization 
# Mark messages for translation

# Version 7.1.2-2.PGDG Lamar Owen 
# sync up.
# Karl's fixes for some quoting issues.

# Version 7.2b2 Lamar Owen 
# version change.

# Version 7.2 final.  Lamar Owen 
# reload from Peter E.
# Eliminate the pidof postmaster test in stop -- we're using pg_ctl so we don't need pidof.
# Tested the $? return for the stop script -- it does in fact propagate.
# TODO: multiple postmasters.

# VErsion 7.3 Lamar OWen 
# Multiple postmasters, courtesy Karl DeBisschop

# PGVERSION is:
PGVERSION=7.3

# Source function library.
INITD=/etc/rc.d/init.d
. $INITD/functions

# Get function listing for cross-distribution logic.
TYPESET=`typeset -f|grep "declare"`

# Get config.
. /etc/sysconfig/network

# Find the name of the script
NAME=`basename $0`
if [ ${NAME:0:1} = "S" -o ${NAME:0:1} = "K" ]
then
	NAME=${NAME:3}
fi


# Set defaults for port and database directory
PGPORT=5432
export PGDATA=/var/lib/pgsql
if [ -f $PGDATA/PG_VERSION ] && [ -d $PGDATA/base/template1 ]
then
	echo "Using old-style directory structure"
else
	export PGDATA=/var/lib/pgsql/data
fi

# Override defaults from /etc/sysconfig/pgsql if file is present
[ -f /etc/sysconfig/pgsql/${NAME} ] && . /etc/sysconfig/pgsql/${NAME}
export PGDATA
export PGPORT

# Check that networking is up.
# Pretty much need it for postmaster.
[ "${NETWORKING}" = "no" ] && exit 0

[ -f /usr/bin/postmaster ] || exit 0

start(){
	PSQL_START=$"Starting ${NAME} service: "

	# Check for the PGDATA structure
	if [ -f $PGDATA/PG_VERSION ] && [ -d $PGDATA/base ]
	then
	# Check version of existing PGDATA

		if [ `cat $PGDATA/PG_VERSION` != '7.3' ]
		then
			SYSDOCDIR="(Your System's documentation directory)"
			if [ -d /usr/doc/postgresql-$PGVERSION ]
			then
				SYSDOCDIR=/usr/doc
			fi
			if [ -d /usr/share/doc/postgresql-$PGVERSION ]
			then
				SYSDOCDIR=/usr/share/doc
			fi
			if [ -d /usr/doc/packages/postgresql-$PGVERSION ]
			then
				SYSDOCDIR=/usr/doc/packages
			fi
			if [ -d /usr/share/doc/packages/postgresql-$PGVERSION ]
			then
				SYSDOCDIR=/usr/share/doc/packages
			fi
			echo
			echo $"An old version of the database format was found.\nYou need to upgrade the data format before using PostgreSQL.\nSee $SYSDOCDIR/postgresql-$PGVERSION/README.rpm-dist for more information."
			exit 1
#                       This doesn't seem to do anything useful...
#		else
#			if echo "$TYPESET"|grep "declare -f success ()" >/dev/null
#			then
#				success "$PSQL_CHECK"
#			else
#				echo "  [ OK ]"
#			fi
#			echo
		fi

	# No existing PGDATA! Initdb it.

	else
	        echo -n $"Initializing database: "
                if [ ! -d $PGDATA ]
		then
			mkdir -p $PGDATA
			chown postgres.postgres $PGDATA
			chmod go-rwx $PGDATA
		fi
		# Make sure the locale from the initdb is preserved for later startups...
		[ -f /etc/sysconfig/i18n ] && cp /etc/sysconfig/i18n $PGDATA/../initdb.i18n
		# Just in case no locale was set, use en_US
		[ ! -f /etc/sysconfig/i18n ] && echo "LANG=en_US" > $PGDATA/../initdb.i18n 
		# Is expanded this early to be used in the command su runs
		echo "export LANG LC_ALL LC_CTYPE LC_COLLATE LC_NUMERIC LC_CTYPE LC_TIME" >> $PGDATA/../initdb.i18n
		# Initialize the database
		su -l postgres -s /bin/sh -c "/usr/bin/initdb --pgdata=$PGDATA > /dev/null 2>&1" < /dev/null
		[ -f $PGDATA/PG_VERSION ] && echo_success
		[ ! -f $PGDATA/PG_VERSION ] && echo_failure
		echo
 	fi

	# Check for postmaster already running...
  # note that pg_ctl only looks at the data structures in PGDATA
  # you really do need the pidof()
	pid=`pidof -s /usr/bin/postmaster`
	if [ $pid ] && /usr/bin/pg_ctl status -D $PGDATA > /dev/null 2>&1
	then
		echo $"Postmaster already running."
	else
		#all systems go -- remove any stale lock files
		rm -f /tmp/.s.PGSQL.${PGPORT} > /dev/null
		echo -n "$PSQL_START"
		su -l postgres -s /bin/sh -c "/usr/bin/pg_ctl  -D $PGDATA -p /usr/bin/postmaster -o '-p ${PGPORT}' start  > /dev/null 2>&1" < /dev/null
 		sleep 1
 		pid=`pidof -s /usr/bin/postmaster`
 		if [ $pid ]
		then
			success "$PSQL_START"
			touch /var/lock/subsys/${NAME}
			echo $pid > /var/run/postmaster.${PGPORT}.pid
			echo
		else
			failure "$PSQL_START"
			echo
		fi
	fi
}

stop(){
	echo -n $"Stopping ${NAME} service: "
	su -l postgres -s /bin/sh -c "/usr/bin/pg_ctl stop -D $PGDATA -s -m fast" > /dev/null 2>&1
	ret=$? 
	if [ $ret -eq 0 ]
	then
		echo_success
	else
		echo_failure
	fi
	echo
	rm -f /var/run/postmaster.${PGPORT}.pid
	rm -f /var/lock/subsys/${NAME}
}

restart(){
    stop
    start
}

condrestart(){
    [ -e /var/lock/subsys/${NAME} ] && restart
}

reload(){
    su -l postgres -s /bin/sh -c "/usr/bin/pg_ctl reload -D $PGDATA -s" > /dev/null 2>&1
}

# This script is slightly unusual in that the name of the daemon (postmaster)
# is not the same as the name of the subsystem (postgresql)

# See how we were called.
case "$1" in
  start)
	start
	;;
  stop)
	stop
	;;
  status)
	status postmaster
	;;
  restart)
	restart
	;;
  condrestart)
	condrestart
	;;
  reload|force-reload)
	reload
	;;
  *)
	echo $"Usage: $0 {start|stop|status|restart|condrestart|reload|force-reload}"
	exit 1
esac

exit 0