#!/bin/bash
#
# This file is part of 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 General Public License as
# published by the Free Software Foundation; either version 3, 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public
# License along with TALER; see the file COPYING. If not, see
#
#
# Author: Christian Grothoff
#
# This script configures and launches various GNU Taler services.
# Which ones depend on command-line options. Use "-h" to find out.
# Prints "<>" on a separate line once all requested services
# are running. Close STDIN (or input 'NEWLINE') to stop all started
# services again.
#
set -eu
# Exit, with status code "skip" (no 'real' failure)
function exit_skip() {
echo " SKIP: " "$@" >&2
exit 77
}
# Exit, with error message (hard failure)
function exit_fail() {
echo " FAIL: " "$@" >&2
exit 1
}
# Cleanup to run whenever we exit
function cleanup()
{
echo "Taler unified setup terminating!" >&2
for n in $(jobs -p)
do
kill $n 2> /dev/null || true
done
wait
rm -f libeufin-nexus.pid libeufin-sandbox.pid
}
# Install cleanup handler (except for kill -9)
trap cleanup EXIT
WAIT_FOR_SIGNAL=0
START_AUDITOR=0
START_BACKUP=0
START_EXCHANGE=0
START_FAKEBANK=0
START_AGGREGATOR=0
START_MERCHANT=0
START_NEXUS=0
START_SANDBOX=0
START_TRANSFER=0
START_WIREWATCH=0
USE_ACCOUNT="exchange-account-1"
USE_VALGRIND=""
WIRE_DOMAIN="x-taler-bank"
CONF_ORIG="~/.config/taler.conf"
LOGLEVEL="DEBUG"
DEFAULT_SLEEP="0.2"
# Parse command-line options
while getopts ':abc:d:efghL:mnr:stu:vwW' OPTION; do
case "$OPTION" in
a)
START_AUDITOR="1"
;;
b)
START_BACKUP="1"
;;
c)
CONF_ORIG="$OPTARG"
;;
d)
WIRE_DOMAIN="$OPTARG"
;;
e)
START_EXCHANGE="1"
;;
f)
START_FAKEBANK="1"
;;
h)
echo 'Supported options:'
echo ' -a -- start auditor'
echo ' -b -- start backup/sync'
echo ' -c $CONF -- set configuration'
echo ' -d $METHOD -- use wire method (default: x-taler-bank)'
echo ' -e -- start exchange'
echo ' -f -- start fakebank'
echo ' -g -- start aggregator'
echo ' -h -- print this help'
echo ' -L $LOGLEVEL -- set log level'
echo ' -m -- start merchant'
echo ' -n -- start nexus'
echo ' -r $MEX -- which exchange to use at the merchant (optional)'
echo ' -s -- start sandbox'
echo ' -t -- start transfer'
echo ' -u $SECTION -- exchange account to use'
echo ' -v -- use valgrind'
echo ' -w -- start wirewatch'
exit 0
;;
g)
START_AGGREGATOR="1"
;;
L)
LOGLEVEL="$OPTARG"
;;
m)
START_MERCHANT="1"
;;
n)
START_NEXUS="1"
;;
r)
USE_MERCHANT_EXCHANGE="$OPTARG"
;;
s)
START_SANDBOX="1"
;;
t)
START_TRANSFER="1"
;;
u)
USE_ACCOUNT="$OPTARG"
;;
v)
USE_VALGRIND="valgrind --leak-check=yes"
DEFAULT_SLEEP="2"
;;
w)
START_WIREWATCH="1"
;;
W)
WAIT_FOR_SIGNAL="1"
;;
?)
exit_fail "Unrecognized command line option"
;;
esac
done
echo "Starting with configuration file at: $CONF_ORIG"
CONF="$CONF_ORIG.edited"
cp "${CONF_ORIG}" "${CONF}"
echo -n "Testing for jq"
jq -h > /dev/null || exit_skip " jq required"
echo " FOUND"
if [ "1" = "$START_EXCHANGE" ]
then
echo -n "Testing for Taler exchange"
taler-exchange-httpd -h > /dev/null || exit_skip " taler-exchange-httpd required"
echo " FOUND"
fi
if [ "1" = "$START_MERCHANT" ]
then
echo -n "Testing for Taler merchant"
taler-merchant-httpd -h > /dev/null || exit_skip " taler-merchant-httpd required"
echo " FOUND"
fi
if [ "1" = "$START_BACKUP" ]
then
echo -n "Testing for sync-httpd"
sync-httpd -h > /dev/null || exit_skip " sync-httpd required"
echo " FOUND"
fi
if [ "1" = "$START_NEXUS" ]
then
echo -n "Testing for libeufin-cli"
libeufin-cli --help >/dev/null needs a fix!
rm -f *.sqlite3
EXCHANGE_URL=$(taler-config -c "$CONF" -s "EXCHANGE" -o "BASE_URL")
CURRENCY=$(taler-config -c "$CONF" -s "TALER" -o "CURRENCY")
register_sandbox_account() {
export LIBEUFIN_SANDBOX_USERNAME="$1"
export LIBEUFIN_SANDBOX_PASSWORD="$2"
# FIXME-MS: delete should be removed after we make 'register' idempotent!
libeufin-cli sandbox \
demobank \
delete \
--bank-account "$1" &> /dev/null || true
MAYBE_IBAN="${4:-}"
if test -n "$MAYBE_IBAN"; then
libeufin-cli sandbox \
demobank \
register --name "$3" --iban "$MAYBE_IBAN"
else
libeufin-cli sandbox \
demobank \
register --name "$3"
fi
unset LIBEUFIN_SANDBOX_USERNAME
unset LIBEUFIN_SANDBOX_PASSWORD
}
if [[ "1" = "$START_NEXUS" || "1" = "$START_FAKEBANK" ]]
then
BANK_PORT=$(taler-config -c "$CONF" -s "BANK" -o "HTTP_PORT")
if [ "1" = "$START_NEXUS" ]
then
NEXUS_PORT="$BANK_PORT"
SANDBOX_PORT="1$BANK_PORT"
else
NEXUS_PORT="0"
SANDBOX_PORT="1$BANK_PORT"
fi
else
if [ "1" = "$START_SANDBOX" ]
then
BANK_PORT=$(taler-config -c "$CONF" -s "BANK" -o "HTTP_PORT")
SANDBOX_PORT="$BANK_PORT"
fi
fi
if [ "1" = "$START_SANDBOX" ]
then
export LIBEUFIN_SANDBOX_DB_CONNECTION=$(taler-config -c "$CONF" -s "libeufin-sandbox" -o "DB_CONNECTION")
# Create the default demobank.
echo -n "Configuring sandbox "
libeufin-sandbox config \
--currency "$CURRENCY" \
--users-debt-limit 99999999 \
--bank-debt-limit 99999999 \
default &> libeufin-sandbox-config.log
echo "DONE"
echo -n "Launching sandbox ... "
export LIBEUFIN_SANDBOX_ADMIN_PASSWORD="secret"
libeufin-sandbox serve \
--port "$SANDBOX_PORT" \
> libeufin-sandbox-stdout.log \
2> libeufin-sandbox-stderr.log &
echo $! > libeufin-sandbox.pid
echo "DONE"
export LIBEUFIN_SANDBOX_URL="http://localhost:$SANDBOX_PORT/"
OK="0"
echo -n "Waiting for Sandbox ..."
for n in $(seq 1 100); do
echo -n "."
sleep "$DEFAULT_SLEEP"
wget --timeout=1 \
--tries=3 \
--waitretry=0 \
-o /dev/null \
-O /dev/null \
"$LIBEUFIN_SANDBOX_URL" || continue
OK="1"
break
done
if [ "1" != "$OK" ]
then
exit_skip "Failed to launch services (sandbox)"
fi
echo "OK"
echo -n "Register Sandbox users ..."
# The specified IBAN and name must match the ones hard-coded into
# the C helper for the add-incoming call. Without this value,
# Sandbox won't find the target account to debit along a /add-incoming
# call.
register_sandbox_account fortytwo x "User42" FR7630006000011234567890189
register_sandbox_account fortythree x "Forty Three"
register_sandbox_account exchange x "Exchange Company"
register_sandbox_account tor x "Tor Project"
register_sandbox_account gnunet x "GNUnet"
register_sandbox_account tutorial x "Tutorial"
register_sandbox_account survey x "Survey"
echo " DONE"
echo -n "Fixing up exchange's PAYTO_URI in the config ..."
export LIBEUFIN_SANDBOX_USERNAME="exchange"
export LIBEUFIN_SANDBOX_PASSWORD="x"
EXCHANGE_PAYTO=$(libeufin-cli sandbox demobank info --bank-account exchange | jq --raw-output '.paytoUri')
taler-config -c "$CONF" -s "$USE_ACCOUNT" -o "PAYTO_URI" -V "$EXCHANGE_PAYTO"
echo " OK"
echo -n "Setting this exchange as the bank's default ..."
libeufin-sandbox default-exchange "$EXCHANGE_URL" "$EXCHANGE_PAYTO"
echo " OK"
# Prepare EBICS: create Ebics host and Exchange subscriber.
# Shortly becoming admin to setup Ebics.
export LIBEUFIN_SANDBOX_USERNAME="admin"
export LIBEUFIN_SANDBOX_PASSWORD="secret"
echo -n "Create EBICS host at Sandbox.."
# FIXME-MS: || true should be removed after we make 'create' idempotent!
libeufin-cli sandbox \
--sandbox-url "$LIBEUFIN_SANDBOX_URL" \
ebicshost create --host-id talerebics &> libeufin-sandbox-ebicshost-create.log || true
echo "OK"
echo -n "Create exchange EBICS subscriber at Sandbox.."
# FIXME-MS: || true should be removed after we make 'new-ebicssubscriber' idempotent!
libeufin-cli sandbox \
demobank new-ebicssubscriber --host-id talerebics \
--user-id exchangeebics --partner-id talerpartner \
--bank-account exchange &> libeufin-sandbox-ebicsscubscriber.log || true
# that's a username _and_ a bank account name
echo "OK"
unset LIBEUFIN_SANDBOX_USERNAME
unset LIBEUFIN_SANDBOX_PASSWORD
fi
if [ "1" = "$START_NEXUS" ]
then
echo "Setting up Nexus ..."
# Prepare Nexus, which is the side actually talking
# to the exchange.
export LIBEUFIN_NEXUS_DB_CONNECTION=$(taler-config -c "$CONF" -s "libeufin-nexus" -o "DB_CONNECTION")
# For convenience, username and password are
# identical to those used at the Sandbox.
echo -n "Create exchange Nexus user ..."
libeufin-nexus superuser exchange --password x
echo "OK"
libeufin-nexus serve --port "$NEXUS_PORT" \
2> libeufin-nexus-stderr.log \
> libeufin-nexus-stdout.log &
echo $! > libeufin-nexus.pid
export LIBEUFIN_NEXUS_URL="http://localhost:$NEXUS_PORT"
echo -n "Waiting for Nexus ..."
OK="0"
for n in $(seq 1 100); do
echo -n "."
sleep "$DEFAULT_SLEEP"
wget --timeout=1 \
--tries=3 \
--waitretry=0 \
-o /dev/null \
-O /dev/null \
"$LIBEUFIN_NEXUS_URL" || continue
OK="1"
break
done
if [ "1" != "$OK" ]
then
exit_skip "Failed to launch services (bank)"
fi
echo " OK"
export LIBEUFIN_NEXUS_USERNAME=exchange
export LIBEUFIN_NEXUS_PASSWORD=x
echo -n "Creating a EBICS connection at Nexus ..."
# FIXME-MS: '||true' should be removed after we make 'new-ebics-connection' idempotent!
libeufin-cli connections new-ebics-connection \
--ebics-url "http://localhost:$SANDBOX_PORT/ebicsweb" \
--host-id talerebics \
--partner-id talerpartner \
--ebics-user-id exchangeebics \
talerconn
echo "OK"
echo -n "Setup EBICS keying ..."
libeufin-cli connections connect talerconn
echo "OK"
echo -n "Download bank account name from Sandbox ..."
libeufin-cli connections download-bank-accounts talerconn
echo "OK"
echo -n "Importing bank account info into Nexus ..."
libeufin-cli connections import-bank-account \
--offered-account-id exchange \
--nexus-bank-account-id exchange-nexus \
talerconn
echo "OK"
echo -n "Setup payments submission task..."
# Tries every second.
libeufin-cli accounts task-schedule \
--task-type submit \
--task-name exchange-payments \
--task-cronspec "* * *" \
exchange-nexus
echo "OK"
# Tries every second. Ask C52
echo -n "Setup history fetch task..."
libeufin-cli accounts task-schedule \
--task-type fetch \
--task-name exchange-history \
--task-cronspec "* * *" \
--task-param-level report \
--task-param-range-type latest \
exchange-nexus
echo "OK"
# create Taler facade.
echo -n "Create the Taler facade at Nexus..."
libeufin-cli facades \
new-taler-wire-gateway-facade \
--currency TESTKUDOS --facade-name test-facade \
talerconn exchange-nexus
echo "OK"
# Facade schema: http://localhost:$NEXUS_PORT/facades/test-facade/taler-wire-gateway/
# FIXME: set the above URL automatically in the configuration?
fi
if [ "1" = "$START_FAKEBANK" ]
then
echo "Setting up fakebank ..."
$USE_VALGRIND taler-fakebank-run -c "$CONF" -L "$LOGLEVEL" 2> taler-fakebank-run.log &
fi
if [ "1" = "$START_EXCHANGE" ]
then
echo -n "Starting exchange ..."
EXCHANGE_PORT=$(taler-config -c "$CONF" -s EXCHANGE -o PORT)
EXCHANGE_URL="http://localhost:${EXCHANGE_PORT}/"
MASTER_PRIV_FILE=$(taler-config -f -c "${CONF}" -s "EXCHANGE-OFFLINE" -o "MASTER_PRIV_FILE")
MASTER_PRIV_DIR=$(dirname "$MASTER_PRIV_FILE")
mkdir -p "${MASTER_PRIV_DIR}"
if [ ! -e "$MASTER_PRIV_FILE" ]
then
gnunet-ecc -g1 "$MASTER_PRIV_FILE" > /dev/null 2> /dev/null
echo -n "."
fi
MASTER_PUB=$(gnunet-ecc -p "${MASTER_PRIV_FILE}")
MPUB=$(taler-config -c "$CONF" -s exchange -o MASTER_PUBLIC_KEY)
if [ "$MPUB" != "$MASTER_PUB" ]
then
echo -n " patching master_pub ($MASTER_PUB)..."
taler-config -c "$CONF" -s exchange -o MASTER_PUBLIC_KEY -V "$MASTER_PUB"
fi
taler-exchange-dbinit -c "$CONF" --reset
$USE_VALGRIND taler-exchange-secmod-eddsa -c "$CONF" -L "$LOGLEVEL" 2> taler-exchange-secmod-eddsa.log &
$USE_VALGRIND taler-exchange-secmod-rsa -c "$CONF" -L "$LOGLEVEL" 2> taler-exchange-secmod-rsa.log &
$USE_VALGRIND taler-exchange-secmod-cs -c "$CONF" -L "$LOGLEVEL" 2> taler-exchange-secmod-cs.log &
$USE_VALGRIND taler-exchange-httpd -c "$CONF" -L "$LOGLEVEL" 2> taler-exchange-httpd.log &
EXCHANGE_HTTPD_PID=$!
echo " DONE"
fi
if [ "1" = "$START_WIREWATCH" ]
then
echo -n "Starting wirewatch ..."
$USE_VALGRIND taler-exchange-wirewatch \
--account="$USE_ACCOUNT" \
-c "$CONF" \
--longpoll-timeout="1 s" \
2> taler-exchange-wirewatch.log &
WIREWATCH_PID=$!
echo " DONE"
fi
if [ "1" = "$START_AGGREGATOR" ]
then
echo -n "Starting aggregator ..."
$USE_VALGRIND taler-exchange-aggregator -c "$CONF" 2> taler-exchange-aggregator.log &
AGGREGATOR_PID=$!
echo " DONE"
fi
if [ "1" = "$START_TRANSFER" ]
then
echo -n "Starting transfer ..."
$USE_VALGRIND taler-exchange-transfer -c "$CONF" 2> taler-exchange-transfer.log &
TRANSFER_PID=$!
echo " DONE"
fi
if [ "1" = "$START_MERCHANT" ]
then
echo -n "Starting merchant ..."
if [ ! -z "${USE_MERCHANT_EXCHANGE+x}" ]
then
MEPUB=$(taler-config -c "$CONF" -s "${USE_MERCHANT_EXCHANGE}" -o MASTER_KEY)
MXPUB=${MASTER_PUB:-$(taler-config -c "$CONF" -s exchange -o MASTER_PUBLIC_KEY)}
if [ "$MEPUB" != "$MXPUB" ]
then
echo -n " patching master_pub ($MXPUB)..."
taler-config -c "$CONF" -s "${USE_MERCHANT_EXCHANGE}" -o MASTER_KEY -V "$MXPUB"
fi
fi
MERCHANT_PORT=$(taler-config -c "$CONF" -s MERCHANT -o PORT)
MERCHANT_URL="http://localhost:${MERCHANT_PORT}/"
taler-merchant-dbinit -c "$CONF" -L "$LOGLEVEL" --reset &> taler-merchant-dbinit.log
$USE_VALGRIND taler-merchant-httpd -c "$CONF" -L "$LOGLEVEL" 2> taler-merchant-httpd.log &
MERCHANT_HTTPD_PID=$!
$USE_VALGRIND taler-merchant-webhook -c "$CONF" -L "$LOGLEVEL" 2> taler-merchant-webhook.log &
MERCHANT_WEBHOOK_PID=$!
echo " DONE"
fi
if [ "1" = "$START_BACKUP" ]
then
echo -n "Starting sync ..."
SYNC_PORT=$(taler-config -c "$CONF" -s SYNC -o PORT)
SYNC_URL="http://localhost:${SYNC_PORT}/"
sync-dbinit -c "$CONF" --reset
$USE_VALGRIND sync-httpd -c "$CONF" -L "$LOGLEVEL" 2> sync-httpd.log &
echo " DONE"
fi
if [ "1" = "$START_AUDITOR" ]
then
echo -n "Starting auditor ..."
AUDITOR_URL=$(taler-config -c "$CONF" -s AUDITOR -o BASE_URL)
AUDITOR_PRIV_FILE=$(taler-config -f -c "$CONF" -s AUDITOR -o AUDITOR_PRIV_FILE)
AUDITOR_PRIV_DIR=$(dirname "$AUDITOR_PRIV_FILE")
mkdir -p "$AUDITOR_PRIV_DIR"
if [ ! -e "$AUDITOR_PRIV_FILE" ]
then
gnunet-ecc -g1 "$AUDITOR_PRIV_FILE" > /dev/null 2> /dev/null
echo -n "."
fi
AUDITOR_PUB=$(gnunet-ecc -p "${AUDITOR_PRIV_FILE}")
MAPUB=${MASTER_PUB:-$(taler-config -c "$CONF" -s exchange -o MASTER_PUBLIC_KEY)}
taler-auditor-dbinit -c "$CONF" --reset
taler-auditor-exchange -c "$CONF" -m "$MAPUB" -u "$EXCHANGE_URL"
$USE_VALGRIND taler-auditor-httpd -L "$LOGLEVEL" -c "$CONF" 2> taler-auditor-httpd.log &
echo " DONE"
fi
if [[ "1" = "$START_NEXUS" || "1" = "$START_FAKEBANK" ]]
then
echo -n "Waiting for the bank"
# Wait for bank to be available (usually the slowest)
OK="0"
for n in $(seq 1 300)
do
echo -n "."
sleep "$DEFAULT_SLEEP"
# bank
wget --tries=1 \
--waitretry=0 \
--timeout=1 \
--user admin \
--password secret \
"http://localhost:8082/" \
-o /dev/null \
-O /dev/null >/dev/null || continue
OK="1"
break
done
if [ "1" != "$OK" ]
then
exit_skip "Failed to launch services (bank)"
fi
echo " OK"
fi
echo -n "Waiting for Taler services ..."
# Wait for all other taler services to be available
for n in $(seq 1 20)
do
sleep "$DEFAULT_SLEEP"
OK="0"
if [ "1" = "$START_EXCHANGE" ]
then
echo -n "E"
wget \
--tries=1 \
--timeout=1 \
"${EXCHANGE_URL}config" \
-o /dev/null \
-O /dev/null >/dev/null || continue
fi
if [ "1" = "$START_MERCHANT" ]
then
echo -n "M"
wget \
--tries=1 \
--timeout=1 \
"${MERCHANT_URL}config" \
-o /dev/null \
-O /dev/null >/dev/null || continue
fi
if [ "1" = "$START_BACKUP" ]
then
echo -n "S"
wget \
--tries=1 \
--timeout=1 \
"${SYNC_URL}config" \
-o /dev/null \
-O /dev/null >/dev/null || continue
fi
if [ "1" = "$START_AUDITOR" ]
then
echo -n "A"
wget \
--tries=1 \
--timeout=1 \
"${AUDITOR_URL}config" \
-o /dev/null \
-O /dev/null >/dev/null || continue
fi
OK="1"
break
done
if [ 1 != "$OK" ]
then
exit_skip "Failed to launch (some) Taler services"
fi
echo " OK"
if [ "1" = "$START_EXCHANGE" ]
then
echo -n "Wait for exchange /management/keys to be ready "
OK="0"
LAST_RESPONSE=$(mktemp tmp-last-response.XXXXXXXX)
for n in $(seq 1 50)
do
echo -n "."
sleep "$DEFAULT_SLEEP"
# exchange
wget \
--tries=3 \
--waitretry=0 \
--timeout=1 \
"http://localhost:8081/management/keys"\
-o /dev/null \
-O "$LAST_RESPONSE" \
>/dev/null || continue
OK="1"
break;
done
if [ "1" != "$OK" ]
then
cat "$LAST_RESPONSE"
exit_fail "Failed to setup exchange keys, check secmod logs"
fi
rm "$LAST_RESPONSE"
echo " OK"
echo -n "Setting up exchange keys ..."
taler-exchange-offline -c "$CONF" \
download \
sign \
wire-fee now "$WIRE_DOMAIN" "$CURRENCY:0.01" "$CURRENCY:0.01" \
global-fee now "$CURRENCY:0.01" "$CURRENCY:0.01" "$CURRENCY:0.01" 1h 1year 5 \
upload &> taler-exchange-offline.log
echo "OK"
ENABLED=$(taler-config -c "$CONF" -s "$USE_ACCOUNT" -o "ENABLE_CREDIT")
if [ "YES" = "$ENABLED" ]
then
echo -n "Configuring bank account $USE_ACCOUNT ..."
EXCHANGE_PAYTO_URI=$(taler-config -c "$CONF" -s "$USE_ACCOUNT" -o "PAYTO_URI")
taler-exchange-offline -c "$CONF" \
enable-account "$EXCHANGE_PAYTO_URI" \
upload &> "taler-exchange-offline-account.log"
echo " OK"
else
echo "WARNING: Account ${USE_ACCOUNT} not enabled (set to: '$ENABLED')"
fi
if [ "1" = "$START_AUDITOR" ]
then
echo -n "Enabling auditor ..."
taler-exchange-offline -c "$CONF" \
enable-auditor $AUDITOR_PUB $AUDITOR_URL "$CURRENCY Auditor" \
upload &> taler-exchange-offline-auditor.log
echo "OK"
fi
echo -n "Checking /keys "
OK="0"
LAST_RESPONSE=$(mktemp tmp-last-response.XXXXXXXX)
for n in $(seq 1 10)
do
echo -n "."
sleep "$DEFAULT_SLEEP"
wget \
--tries=1 \
--timeout=1 \
"http://localhost:8081/keys" \
-o /dev/null \
-O "$LAST_RESPONSE" \
>/dev/null || continue
OK="1"
break
done
if [ "1" != "$OK" ]
then
cat "$LAST_RESPONSE"
exit_fail " Failed to setup keys"
fi
rm "$LAST_RESPONSE"
echo " OK"
fi
if [ "1" = "$START_AUDITOR" ]
then
echo -n "Setting up auditor signatures ..."
timeout 15 taler-auditor-offline -c "$CONF" \
download \
sign \
upload &> taler-auditor-offline.log
echo " OK"
fi
# Signal caller that we are ready.
echo "<>"
if [ "1" = "$WAIT_FOR_SIGNAL" ]
then
while true
do
sleep 0.1
done
else
# Wait until caller stops us.
read
fi
echo "Taler unified setup terminating!" >&2
exit 0