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#!/bin/bash
# This file is part of GNU TALER.
# Copyright (C) 2023 Taler Systems SA
#
# TALER is free software; you can redistribute it and/or modify it under the
# terms of the GNU Lesser General Public License as published by the Free Software
# Foundation; either version 2.1, or (at your option) any later version.
#
# TALER is distributed in the hope that it will be useful, but WITHOUT ANY
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
# A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License along with
# TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
#
# @author Christian Grothoff
#
#
# Error checking on
set -eu
RESET_DB=0
SKIP_DBINIT=0
FORCE_PERMS=0
DBUSER="taler-exchange-httpd"
DBGROUP="taler-exchange-db"
CFGFILE="/etc/taler/taler.conf"
# Parse command-line options
while getopts 'c:g:hprsu:' OPTION; do
case "$OPTION" in
c)
CFGFILE="$OPTARG"
;;
h)
echo 'Supported options:'
echo " -c FILENAME -- use configuration FILENAME (default: $CFGFILE)"
echo " -g GROUP -- taler-exchange to be run by GROUP (default: $DBGROUP)"
echo " -h -- print this help text"
echo " -r -- reset database (dangerous)"
echo " -p -- force permission setup even without database initialization"
echo " -s -- skip database initialization"
echo " -u USER -- taler-exchange to be run by USER (default: $DBUSER)"
exit 0
;;
p)
FORCE_PERMS="1"
;;
r)
RESET_DB="1"
;;
s)
SKIP_DBINIT="1"
;;
u)
DBUSER="$OPTARG"
;;
?)
echo "Unrecognized command line option" 1>&2
exit 1
;;
esac
done
if ! id postgres >/dev/null; then
echo "Could not find 'postgres' user. Please install Postgresql first"
exit 1
fi
if [ "$(id -u)" -ne 0 ]; then
echo "This script must be run as root"
exit 1
fi
if [ 0 = "$SKIP_DBINIT" ]; then
if ! taler-exchange-dbinit -v 2>/dev/null; then
echo "Required 'taler-exchange-dbinit' not found. Please fix your installation."
exit 1
fi
DBINIT=$(which taler-exchange-dbinit)
fi
if ! id "$DBUSER" >/dev/null; then
echo "Could not find '$DBUSER' user. Please set it up first"
exit 1
fi
echo "Setting up database user '$DBUSER'." 1>&2
if ! sudo -i -u postgres createuser "$DBUSER" 2>/dev/null; then
echo "Database user '$DBUSER' already existed. Continuing anyway." 1>&2
fi
DBPATH=$(taler-config \
-c "$CFGFILE" \
-s exchangedb-postgres \
-o CONFIG)
if ! echo "$DBPATH" | grep "postgres://" >/dev/null; then
echo "Invalid database configuration value '$DBPATH'." 1>&2
exit 1
fi
DBNAME=$(echo "$DBPATH" |
sed \
-e "s/postgres:\/\/.*\///" \
-e "s/?.*//")
if sudo -i -u postgres psql "$DBNAME" </dev/null 2>/dev/null; then
if [ 1 = "$RESET_DB" ]; then
echo "Deleting existing database '$DBNAME'." 1>&2
if ! sudo -i -u postgres dropdb "$DBNAME"; then
echo "Failed to delete existing database '$DBNAME'"
exit 1
fi
DO_CREATE=1
else
echo "Database '$DBNAME' already exists, continuing anyway."
DO_CREATE=0
fi
else
DO_CREATE=1
fi
if [ 1 = "$DO_CREATE" ]; then
echo "Creating database '$DBNAME'." 1>&2
if ! sudo -i -u postgres createdb -O "$DBUSER" "$DBNAME"; then
echo "Failed to create database '$DBNAME'"
exit 1
fi
fi
if [ 0 = "$SKIP_DBINIT" ]; then
echo "Initializing database '$DBNAME'." 1>&2
if ! sudo -u "$DBUSER" "$DBINIT" -c "$CFGFILE"; then
echo "Failed to initialize database schema"
exit 1
fi
fi
if [ 0 = "$SKIP_DBINIT" ] || [ 1 = "$FORCE_PERMS" ]; then
DB_GRP="$(getent group "$DBGROUP" | sed -e "s/.*://g" -e "s/,/ /g")"
echo "Initializing permissions for '$DB_GRP'." 1>&2
for GROUPIE in $DB_GRP; do
if [ "$GROUPIE" != "$DBUSER" ]; then
if ! sudo -i -u postgres createuser "$GROUPIE" 2>/dev/null; then
echo "Database user '$GROUPIE' already existed. Continuing anyway." 1>&2
fi
echo -e 'GRANT SELECT,INSERT,UPDATE,DELETE ON ALL TABLES IN SCHEMA exchange TO "'"$GROUPIE"'";\n' \
'GRANT USAGE ON ALL SEQUENCES IN SCHEMA exchange TO "'"$GROUPIE"'";\n' |
sudo -u "$DBUSER" psql "$DBNAME"
echo -e 'GRANT USAGE ON SCHEMA exchange TO "'"$GROUPIE"'"' |
sudo -u "$DBUSER" psql "$DBNAME"
# FIXME: double-check the following GRANTs
echo -e 'GRANT USAGE ON SCHEMA _v TO "'"$GROUPIE"'"' |
sudo -u "$DBUSER" psql "$DBNAME"
echo -e 'GRANT ALL PRIVILEGES ON ALL TABLES IN SCHEMA _v TO "'"$GROUPIE"'"' |
sudo -u "$DBUSER" psql "$DBNAME"
fi
done
fi
echo "Database configuration finished." 1>&2
exit 0
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