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#!/bin/sh
# This script verifies that the postgresql data directory has been correctly
# initialized. We do not want to automatically initdb it, because that has
# a risk of catastrophic failure (ie, overwriting a valuable database) in
# corner cases, such as a remotely mounted database on a volume that's a
# bit slow to mount. But we can at least emit a message advising newbies
# what to do.
PGDATA="$1"
if [ -z "$PGDATA" ]
then
echo "Usage: $0 database-path"
exit 1
fi
# get PostgreSQL major version automatically
PGMAJORVERSION=$(psql -V | cut -d' ' -f 3 | sed -r 's/[^0-9].*$//')
# Check for the PGDATA structure
if [ -f "$PGDATA/PG_VERSION" ] && [ -d "$PGDATA/base" ]
then
# Check version of existing PGDATA
if [ x`cat "$PGDATA/PG_VERSION"` = x"$PGMAJORVERSION" ]
then
exit 0
else
echo $"An old version of the database format was found."
echo $"You need to dump and reload before using PostgreSQL $PGMAJORVERSION."
echo $"See http://www.postgresql.org/docs/$PGMAJORVERSION/static/upgrading.html"
exit 1
fi
else
# No existing PGDATA! Warn the user to initdb it.
echo $"\"$PGDATA\" is missing or empty. Use a command like"
echo $" su - postgres -c \"initdb --locale en_US.UTF-8 -D '$PGDATA'\""
echo $"with relevant options, to initialize the database cluster."
exit 1
fi
exit 0
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