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#!/bin/bash
# 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.
if test -z "$1"; then
echo "Maintainer error: $0 must be run with one argument"
exit 1
fi
service_name="$1"
if [ -z "$PGDATA" ]; then
echo $"You try to start '$service_name' service"
echo $"but the required \$PGDATA environment variable is not set."
echo $"You should use the @userunitsdir@/$service_name.service.d/ANYTHING.conf"
echo $"configuration file to set \$PGDATA. For more info see"
echo $"the @README_DIST@ file."
exit 1
fi
# Warn the user that the configuration should be adjusted via drop-in, in case
# the $PGDATA variable is set different way (and non-default service name is
# used).
conf_dir="@userunitsdir@/$service_name.service.d"
if [[ "$service_name" == *@* ]] && test ! -d "$conf_dir"; then
echo >&2 $"WARNING: Note that the '$conf_dir'"
echo >&2 $"directory does not exist while you are using non-default service"
echo >&2 $"name '$service_name'. You are encouraged to use the"
echo >&2 $"$conf_dir directory for systemd configuration according"
echo >&2 $"to @README_DIST@ documentation."
fi
# Full PostgreSQL version, e.g. 9.0.2
PGVERSION=@PGVERSION@
# Major version of PostgreSQL, e.g. 9.0
PGMAJORVERSION=@PGMAJORVERSION@
# Previous major version, e.g., 8.4, for upgrades
PREVMAJORVERSION=@PREVMAJORVERSION@
# Distribution README file
README_DIST=@README_DIST@
# Check for the PGDATA structure
if [ -f "$PGDATA/PG_VERSION" ] && [ -d "$PGDATA/base" ]
then
# Check version of existing PGDATA
if [ x`cat "$PGDATA/PG_VERSION"` = x"$PGMAJORVERSION" ]
then
: A-OK
elif [ x`cat "$PGDATA/PG_VERSION"` = x"$PREVMAJORVERSION" ]
then
echo $"An old version of the database format was found."
echo $"Use \"postgresql-setup --upgrade\" to upgrade to version $PGMAJORVERSION."
echo $"See $README_DIST for more information."
exit 1
else
echo $"An old version of the database format was found."
echo $"You need to dump and reload before using PostgreSQL $PGMAJORVERSION."
echo $"See $README_DIST for more information."
exit 1
fi
else
# No existing PGDATA! Warn the user to initdb it.
echo $"\"$PGDATA\" is missing or empty."
echo $"Use \"postgresql-setup --initdb\" to initialize the database cluster."
echo $"See $README_DIST for more information."
exit 1
fi
exit 0
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