valheim-server

#!/bin/bash
# valheim-server starts the Valheim server
# binary either vanilla from /opt/valheim/server
# or if VALHEIM_PLUS=true with the ValheimPlus mod
# from /opt/valheim/plus

# Include defaults and common functions
. /usr/local/etc/valheim/defaults
. /usr/local/etc/valheim/common

export SteamAppId=892970

valheim_server_pid=-1
timeout=29
kill_signal=TERM
password_args=(-password "$SERVER_PASS")

if [ "$VALHEIM_PLUS" = true ]; then
    cd "$vp_install_path"
    rm -rf "$vp_install_path.old"
    export DOORSTOP_ENABLE=TRUE
    export DOORSTOP_INVOKE_DLL_PATH="./BepInEx/core/BepInEx.Preloader.dll"
    export DOORSTOP_CORLIB_OVERRIDE_PATH="./unstripped_corlib"
    export LD_LIBRARY_PATH="$vp_install_path/linux64/:$vp_install_path/doorstop_libs/"
    export LD_PRELOAD=libdoorstop_x64.so
    valheim_server="$vp_install_path/valheim_server.x86_64"
    [ -z "$SERVER_PASS" ] && password_args=()
else
    cd "$valheim_install_path"
    export LD_LIBRARY_PATH="$valheim_install_path/linux64/"
    valheim_server="$valheim_install_path/valheim_server.x86_64"
fi


main() {
    wait_for_server_download
    run_server
}


wait_for_server_download() {
    while :; do
        if [ -f "$valheim_server" ]; then
            break
        else
            debug "Valheim Server is not yet downloaded - waiting"
            sleep 7
        fi
    done
}


# This runs after server start and waits for the
# config files to either exist or for the server
# to create them so their access permissions can
# be adjusted to the proper values.
ensure_permissions_after_start() {
    while :; do
        if [ -f "/config/adminlist.txt" ]; then
            ensure_permissions
            break
        else
            sleep 4
        fi
    done
}


run_server() {
    info "Running Valheim Server"
    "$valheim_server" -nographics -batchmode -name "$SERVER_NAME" -port "$SERVER_PORT" -world "$WORLD_NAME" -public "$SERVER_PUBLIC" "${password_args[@]}" > >(filter stdout)  2> >(filter stderr >&2) &
    valheim_server_pid=$!
    unset LD_LIBRARY_PATH
    unset LD_PRELOAD
    echo $valheim_server_pid > "$valheim_server_pidfile"
    ensure_permissions_after_start &
    permissions_wait_pid=$!
    wait $valheim_server_pid
    [ -d "/proc/$permissions_wait_pid" ] && kill -TERM $permissions_wait_pid
    clear_lock "$valheim_server_pidfile"
    exit 0
}


# This function gets the servers stdout/stderr
# output piped into. It allows for filtering
# of unwanted debug log messages.
filter() {
    unset LD_LIBRARY_PATH
    unset LD_PRELOAD
    case $1 in
        stdout)
            log_filter=$SERVER_LOG_STDOUT_FILTER
            ;;
        stderr)
            log_filter=$SERVER_LOG_STDERR_FILTER
            ;;
    esac
    eval $log_filter
}


shutdown() {
    unset LD_LIBRARY_PATH
    unset LD_PRELOAD
    if [ $valheim_server_pid -eq -1 ]; then
        debug "Valheim server is not running yet - aborting startup"
        exit
    fi
    info "Shutting down Valheim Server with PID $valheim_server_pid"
    kill -INT $valheim_server_pid
    shutdown_timeout=$(($(date +%s)+$timeout))
    while [ -d "/proc/$valheim_server_pid" ]; do
        if [ $(date +%s) -gt $shutdown_timeout ]; then
            shutdown_timeout=$(($(date +%s)+$timeout))
            warn "Timeout while waiting for server to shutdown - sending SIG$kill_signal to PID $valheim_server_pid"
            kill -$kill_signal $valheim_server_pid
            case "$kill_signal" in
                INT)
                    kill_signal=TERM
                    ;;
                *)
                    kill_signal=KILL
            esac
        fi
        debug "Waiting for Valheim Server with PID $valheim_server_pid to shutdown"
        sleep 6
    done
    info "Shutdown complete"
    exit
}


trap shutdown SIGINT SIGTERM
main