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#!/usr/bin/sh
#
# SPDX-License-Identifier: Apache-2.0
# SPDX-FileType: SOURCE
#
# SPDX-FileCopyrightText: 2024 Frederik “Freso” S. Olesen <https://freso.dk/>
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
INSTALL_DIR=/opt/steamtokendumper
CONFIG_DIR="${XDG_CONFIG_HOME:=$HOME/.config}"/SteamTokenDumper
RUN_DIR="$XDG_RUNTIME_DIR"/SteamTokenDumper
EXEC_DIR="$INSTALL_DIR"
unionfs_exists() {
unionfs --version > /dev/null 2>&1
return $?
}
unionfs_setup() {
echo "Setting up UnionFS user writable directory '$CONFIG_DIR'."
# Directories potentially containing Steam login cookie
# should not be world readable, but we don’t care about
# parent directories’ permissions.
# shellcheck disable=SC2174
mkdir -p -m700 "$CONFIG_DIR" "$RUN_DIR"
unionfs -o cow,relaxed_permissions "$CONFIG_DIR=RW:$INSTALL_DIR=RO" "$RUN_DIR"
export EXEC_DIR="$RUN_DIR"
}
unionfs_cleanup() {
if test -e "$RUN_DIR"; then
echo
echo "Cleaning up '$RUN_DIR'…"
fusermount -uzq "$RUN_DIR" > /dev/null 2>&1
rmdir "$RUN_DIR" > /dev/null 2>&1
fi
}
trap unionfs_cleanup INT
if unionfs_exists; then
unionfs_setup
echo "Running SteamTokenDumper from '$EXEC_DIR'."
else
echo "UnionFS not detected; running without user writable directory."
fi
"$EXEC_DIR"/SteamTokenDumper
_exit_code=$?
unionfs_cleanup
exit $_exit_code
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