#! /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 <teg@redhat.com>
# use functions, add conditional restart

# Version 7.0.3 Lamar Owen <lamar@postgresql.org>
# 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 <lamar@postgresql.org>
# initdb parameters have changed.

# Version 7.1.2 Trond Eivind Glomsrd <teg@redhat.com>
# 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 <lamar.owen@wgcr.org>
# sync up.
# Karl's fixes for some quoting issues.

# Version 7.2b2 Lamar Owen <lamar.owen@wgcr.org>
# version change.

# Version 7.2 final.  Lamar Owen <lamar.owen@wgcr.org>
# 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 <lamar.owen@ramifordistat.net>
# Multiple postmasters, courtesy Karl DeBisschop

# PGVERSION is:
PGVERSION=7.4

# Source function library.
INITD=/etc/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
# export PGOPTS

# 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 $PGDATA/PG_VERSION` != '7.4' ]
    then
      SYSDOCDIR="(Your System's documentation directory)"
      if [ -d /usr/doc/postgresql-$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-$PGVERSION ]
      then
        SYSDOCDIR=/usr/share/doc/packages
      fi
      echo
      echo "An old version of the database format was found."
      echo "You need to upgrade the data format before using PostgreSQL."
      echo "See \$SYSDOCDIR/postgresql-$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 --no-locale > /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
