Radix cross Linux

#!/bin/bash

# PostgreSQL startup script for Radix Linux
#
# $Revision: 6804ca7db709 $
# $Date: 2015/03/13 21:57:14 $
#
# Copyright 2007-2015 Adis Nezirovic <adis_at_linux.org.ba>
# All rights reserved.
#
# Redistribution and use of this script, with or without modification, is
# permitted provided that the following conditions are met:
#
# 1. Redistributions of this script must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
#
#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED
#  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
#  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
#  EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
#  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
#  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
#  OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
#  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
#  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
#  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

# Do not source this script (since it contains exit() calls)
#
# Since version 9.3 this startup script can run multiple PostgreSQL
# versions on different ports and with different data dirs.
#
# e.g. PG_VERSION=14.1 PG_PORT=6432 /etc/rc.d/rc.@PKGNAME@ start

PG_VERSION=${PG_VERSION:-@PG_VERSION@}
PG_PORT=${PG_PORT:-@PG_PORT@}
LIBDIRSUFFIX="@LIBDIRSUFFIX@"
LOGFILE=/var/log/@PKGNAME@-$PG_VERSION
DATADIR=/var/lib/pgsql/$PG_VERSION/data
RUNDIR=/var/run/pgsql
POSTGRES=/usr/lib${LIBDIRSUFFIX}/@PKGNAME@/$PG_VERSION/bin/postgres
PG_CTL=/usr/lib${LIBDIRSUFFIX}/@PKGNAME@/$PG_VERSION/bin/pg_ctl
PIDFILE=$DATADIR/postmaster.pid

# oom-killer score
#
# https://www.postgresql.org/docs/14/kernel-resources.html#LINUX-MEMORY-OVERCOMMIT
PG_OOM_ADJUST_FILE=/proc/self/oom_score_adj
PG_MASTER_OOM_SCORE_ADJ=-1000
PG_CHILD_OOM_SCORE_ADJ=0
PG_ENV="PG_OOM_ADJUST_FILE=$PG_OOM_ADJUST_FILE PG_OOM_ADJUST_VALUE=$PG_CHILD_OOM_SCORE_ADJ"

# Return values (according to LSB):
# 0 - success
# 1 - generic or unspecified error
# 2 - invalid or excess argument(s)
# 3 - unimplemented feature (e.g. "reload")
# 4 - insufficient privilege
# 5 - program is not installed
# 6 - program is not configured
# 7 - program is not running

pg_ctl()
{
  CMD="$PG_CTL -o '-p $PG_PORT' $@"
  su - postgres -c "$CMD"
}

if [ ! -f $POSTGRES ]; then
  echo "Could not find 'postgres' binary. Maybe PostgreSQL is not installed properly?"
  exit 5
fi

case "$1" in

  "start")
    echo "Starting PostgreSQL"
    touch $LOGFILE
    chown postgres:wheel $LOGFILE
    chmod 0640 $LOGFILE
    mkdir -p $RUNDIR
    chown -R postgres:postgres $RUNDIR

    if [ ! -e $DATADIR/PG_VERSION ]; then
      echo "You should initialize the PostgreSQL database at location $DATADIR"
      echo "e.g. su postgres -c \"initdb -D $DATADIR --locale=en_US.UTF-8 -A md5 -W\""
      exit 6
    fi

    if [ $(pgrep -f $POSTGRES) ]; then

      echo "PostgreSQL daemon already running"
      if [ ! -f $PIDFILE ]; then
        echo "Warning: Missing pid file $PIDFILE"
      fi
      exit 1

    else
      test -e "$PG_OOM_ADJUST_FILE" && echo "$PG_MASTER_OOM_SCORE_ADJ" > "$PG_OOM_ADJUST_FILE"
      pg_ctl start -w -l $LOGFILE -D $DATADIR
      exit 0
    fi
  ;;

  "stop")
    echo "Shutting down PostgreSQL..."
    pg_ctl stop -l $LOGFILE -D $DATADIR -m smart
  ;;

  "force-stop")
    # Take care! This will kill _all_ client connections
    # and rollback current transactions.
    echo "Shutting down PostgreSQL (fast)..."
    pg_ctl stop -l $LOGFILE -D $DATADIR -m fast
  ;;

  "unclean-stop")
    # Take care! This will abort server process itself
    # resulting with database recovery on next start.
    echo "Shutting down PostgreSQL (immediate)..."
    pg_ctl stop -l $LOGFILE -D $DATADIR -m immediate
  ;;

  "restart")
    echo "Restarting PostgreSQL..."
    test -e "$PG_OOM_ADJUST_FILE" && echo "$PG_MASTER_OOM_SCORE_ADJ" > "$PG_OOM_ADJUST_FILE"
    pg_ctl restart -l $LOGFILE -D $DATADIR -m smart
  ;;

  "force-restart")
    # Take care! This will kill _all_ client connections
    # and rollback current transactions.
    echo "Restarting PostgreSQL (fast)..."
    pg_ctl restart -l $LOGFILE -D $DATADIR -m fast
  ;;

  "unclean-restart")
    # Take care: This will abort server process itself
    # resulting with database recovery on start.
    echo "Restarting PostgreSQL (immediate)..."
    pg_ctl restart -l $LOGFILE -D $DATADIR -m immediate
  ;;

  "reload")
    echo "Reloading configuration for PostgreSQL..."
    pg_ctl reload -l $LOGFILE -D $DATADIR -m smart
  ;;

  "status")
    if [ $(pgrep -f $POSTGRES) ]; then
      echo "PostgreSQL is running"

      if [ ! -e $PIDFILE ]; then
        echo "Warning: Missing pid file $PIDFILE"
      fi

      exit 0
    else
      echo "PostgreSQL is stopped"

      if [ -e $PIDFILE ]; then
        echo "Detected stale pid file $PIDFILE"
      fi

      exit 0
    fi
  ;;

  *)
    # unclean-stop and unclean-restart are not documented on purpose.
    echo "Usage: $0 {start|stop|force-stop|status|restart|force-restart|reload}"
    exit 1
  ;;
esac