initdb.sh

关系型数据库 Postgresql 6.5.2

#!/bin/sh
#-------------------------------------------------------------------------
#
# initdb.sh--
#     Create (initialize) a Postgres database system.  
# 
#     A database system is a collection of Postgres databases all managed
#     by the same postmaster.  
#
#     To create the database system, we create the directory that contains
#     all its data, create the files that hold the global classes, create
#     a few other control files for it, and create one database:  the
#     template database.
#
#     The template database is an ordinary Postgres database.  Its data
#     never changes, though.  It exists to make it easy for Postgres to 
#     create other databases -- it just copies.
#
#     Optionally, we can skip creating the database system and just create
#     (or replace) the template database.
#
#     To create all those classes, we run the postgres (backend) program and
#     feed it data from bki files that are in the Postgres library directory.
#
# Copyright (c) 1994, Regents of the University of California
#
#
# IDENTIFICATION
#    $Header: /usr/local/cvsroot/pgsql/src/bin/initdb/initdb.sh,v 1.60 1999/05/20 16:50:06 wieck Exp $
#
#-------------------------------------------------------------------------

# ----------------
#       The OPT_..._PARAM gets set when the script is built (with make)
#       from parameters set in the make file.
#
# ----------------

CMDNAME=`basename $0`
MULTIBYTEID=0

MULTIBYTE=__MULTIBYTE__
if [  -n "$MULTIBYTE" ];then
	MULTIBYTEID=`pg_encoding $MULTIBYTE`
fi

# Find the default PGLIB directory (the directory that contains miscellaneous 
# files that are part of Postgres).  The user-written program postconfig
# outputs variable settings like "PGLIB=/usr/lib/whatever".  If it doesn't
# output a PGLIB value, then there is no default and the user must
# specify the pglib option.  Postconfig may validly not exist, in which case
# our invocation of it silently fails.

# The 2>/dev/null is to swallow the "postconfig: not found" message if there
# is no postconfig.

postconfig_result="`sh -c postconfig 2>/dev/null`"
if [ ! -z "$postconfig_result" ]; then
  set -a   # Make the following variable assignment exported to environment
  eval "$postconfig_result"
  set +a   # back to normal
fi

# Set defaults:
debug=0
noclean=0
template_only=0
POSTGRES_SUPERUSERNAME=$USER

while [ "$#" -gt 0 ]
do
# ${ARG#--username=} is not reliable or available on all platforms

    case "$1" in
        --debug|-d)
                debug=1
                echo "Running with debug mode on."
                ;;
        --noclean|-n)
                noclean=1
                echo "Running with noclean mode on. "
                     "Mistakes will not be cleaned up."
                ;;
        --template|-t)
                template_only=1
                echo "updating template1 database only."
                ;;
        --username=*)
                POSTGRES_SUPERUSERNAME="`echo $1 | sed 's/^--username=//'`"
                ;;
        -u)
                shift
                POSTGRES_SUPERUSERNAME="$1"
                ;;
        -u*)
                POSTGRES_SUPERUSERNAME="`echo $1 | sed 's/^-u//'`"
                ;;
        --pgdata=*)
                PGDATA="`echo $1 | sed 's/^--pgdata=//'`"
                ;;
        -r)
                shift
                PGDATA="$1"
                ;;
        -r*)
                PGDATA="`echo $1 | sed 's/^-r//'`"
                ;;
        --pglib=*)
                PGLIB="`echo $1 | sed 's/^--pglib=//'`"
                ;;
        -l)
                shift
                PGLIB="$1"
                ;;
        -l*)
                PGLIB="`echo $1 | sed 's/^-l//'`"
                ;;

        --pgencoding=*)
		if [ -z "$MULTIBYTE" ];then
			echo "MULTIBYTE support seems to be disabled"
			exit 100
		fi
                mb="`echo $1 | sed 's/^--pgencoding=//'`"
		MULTIBYTEID=`pg_encoding $mb`
		if [ -z "$MULTIBYTEID" ];then
			echo "$mb is not a valid encoding name"
			exit 100
		fi
                ;;
        -e)
		if [ -z "$MULTIBYTE" ];then
			echo "MULTIBYTE support seems to be disabled"
			exit 100
		fi
                shift
		MULTIBYTEID=`pg_encoding $1`
		if [ -z "$MULTIBYTEID" ];then
			echo "$1 is not a valid encoding name"
			exit 100
		fi
                ;;
        -e*)
		if [ -z "$MULTIBYTE" ];then
			echo "MULTIBYTE support seems to be disabled"
			exit 100
		fi
                mb="`echo $1 | sed 's/^-e//'`"
		MULTIBYTEID=`pg_encoding $mb`
		if [ -z "$MULTIBYTEID" ];then
			echo "$mb is not a valid encoding name"
			exit 100
		fi
                ;;
        *)
                echo "Unrecognized option '$1'.  Syntax is:"
		if [ -z "$MULTIBYTE" ];then
                echo "initdb [-t | --template] [-d | --debug]" \
                     "[-n | --noclean]" \
                     "[-u SUPERUSER | --username=SUPERUSER]" \
                     "[-r DATADIR | --pgdata=DATADIR]" \
                     "[-l LIBDIR | --pglib=LIBDIR]"
		else
                echo "initdb [-t | --template] [-d | --debug]" \
                     "[-n | --noclean]" \
                     "[-u SUPERUSER | --username=SUPERUSER]" \
                     "[-r DATADIR | --pgdata=DATADIR]" \
                     "[-l LIBDIR | --pglib=LIBDIR]" \
                     "[-e ENCODING | --pgencoding=ENCODING]"
		fi
                exit 100
        esac
        shift
done

#-------------------------------------------------------------------------
# Make sure he told us where to find the Postgres files.
#-------------------------------------------------------------------------
if [ -z "$PGLIB" ]; then
    echo "$CMDNAME does not know where to find the files that make up "
    echo "Postgres (the PGLIB directory).  You must identify the PGLIB "
    echo "directory either with a --pglib invocation option, or by "
    echo "setting the PGLIB environment variable, or by having a program "
    echo "called 'postconfig' in your search path that outputs an asignment "
    echo "for PGLIB."
    exit 20
fi

#-------------------------------------------------------------------------
# Make sure he told us where to build the database system
#-------------------------------------------------------------------------

if [ -z "$PGDATA" ]; then
    echo "$CMDNAME: You must identify the PGDATA directory, where the data"
    echo "for this database system will reside.  Do this with either a"
    echo "--pgdata invocation option or a PGDATA environment variable."
    echo
    exit 20
fi

TEMPLATE=$PGLIB/local1_template1.bki.source
GLOBAL=$PGLIB/global1.bki.source
TEMPLATE_DESCR=$PGLIB/local1_template1.description
GLOBAL_DESCR=$PGLIB/global1.description
PG_HBA_SAMPLE=$PGLIB/pg_hba.conf.sample
PG_GEQO_SAMPLE=$PGLIB/pg_geqo.sample


#-------------------------------------------------------------------------
# Find the input files
#-------------------------------------------------------------------------

for PREREQ_FILE in $TEMPLATE $GLOBAL $PG_HBA_SAMPLE; do
    if [ ! -f $PREREQ_FILE ]; then 
        echo "$CMDNAME does not find the file '$PREREQ_FILE'."
        echo "This means you have identified an invalid PGLIB directory."
        echo "You specify a PGLIB directory with a --pglib invocation "
        echo "option, a PGLIB environment variable, or a postconfig program."
        exit 1
    fi
done

[ "$debug" -ne 0 ] && echo "$CMDNAME: using $TEMPLATE as input to create the template database."
if [ $template_only -eq 0 ]; then
    [ "$debug" -ne 0 ] && echo "$CMDNAME: using $GLOBAL as input to create the global classes."
    [ "$debug" -ne 0 ] && echo "$CMDNAME: using $PG_HBA_SAMPLE as the host-based authentication" \
         "control file."
    echo
fi  

#---------------------------------------------------------------------------
# Figure out who the Postgres superuser for the new database system will be.
#---------------------------------------------------------------------------

if [ -z "$POSTGRES_SUPERUSERNAME" ]; then 
    echo "Can't tell what username to use.  You don't have the USER"
    echo "environment variable set to your username and didn't specify the "
    echo "--username option"
    exit 1
fi

POSTGRES_SUPERUID=`pg_id $POSTGRES_SUPERUSERNAME`

if [ ${POSTGRES_SUPERUID:=-1} -eq -1 ]; then
    echo "Unable to determine a valid username.  If you are running"
    echo "initdb without an explicit username specified, then there"
    echo "may be a problem with finding the Postgres shared library"
    echo "and/or the pg_id utility."
    exit 10
fi