142 lines
3.8 KiB
Nix
142 lines
3.8 KiB
Nix
{ config, lib, pkgs, utils, ... }:
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let
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uid = config.ids.uids.gpsd;
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gid = config.ids.gids.gpsd;
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cfg = config.services.gpsd;
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in {
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###### interface
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imports = [
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(lib.mkRemovedOptionModule [ "services" "gpsd" "device" ]
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"Use `services.gpsd.devices` instead.")
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];
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options = {
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services.gpsd = {
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enable = lib.mkOption {
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type = lib.types.bool;
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default = false;
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description = ''
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Whether to enable `gpsd`, a GPS service daemon.
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'';
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};
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devices = lib.mkOption {
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type = lib.types.listOf lib.types.str;
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default = [ "/dev/ttyUSB0" ];
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description = ''
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List of devices that `gpsd` should subscribe to.
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A device may be a local serial device for GPS input, or a
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URL of the form:
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`[{dgpsip|ntrip}://][user:passwd@]host[:port][/stream]` in
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which case it specifies an input source for DGPS or ntrip
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data.
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'';
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};
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readonly = lib.mkOption {
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type = lib.types.bool;
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default = true;
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description = ''
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Whether to enable the broken-device-safety, otherwise
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known as read-only mode. Some popular bluetooth and USB
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receivers lock up or become totally inaccessible when
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probed or reconfigured. This switch prevents gpsd from
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writing to a receiver. This means that gpsd cannot
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configure the receiver for optimal performance, but it
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also means that gpsd cannot break the receiver. A better
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solution would be for Bluetooth to not be so fragile. A
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platform independent method to identify
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serial-over-Bluetooth devices would also be nice.
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'';
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};
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nowait = lib.mkOption {
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type = lib.types.bool;
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default = false;
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description = ''
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don't wait for client connects to poll GPS
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'';
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};
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port = lib.mkOption {
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type = lib.types.port;
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default = 2947;
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description = ''
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The port where to listen for TCP connections.
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'';
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};
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debugLevel = lib.mkOption {
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type = lib.types.int;
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default = 0;
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description = ''
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The debugging level.
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'';
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};
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listenany = lib.mkOption {
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type = lib.types.bool;
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default = false;
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description = ''
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Listen on all addresses rather than just loopback.
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'';
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};
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extraArgs = lib.mkOption {
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type = lib.types.listOf lib.types.str;
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default = [ ];
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example = [ "-r" "-s" "19200" ];
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description = ''
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A list of extra command line arguments to pass to gpsd.
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Check gpsd(8) mangpage for possible arguments.
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'';
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};
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};
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};
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###### implementation
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config = lib.mkIf cfg.enable {
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users.users.gpsd = {
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inherit uid;
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group = "gpsd";
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description = "gpsd daemon user";
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home = "/var/empty";
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};
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users.groups.gpsd = { inherit gid; };
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systemd.services.gpsd = {
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description = "GPSD daemon";
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wantedBy = [ "multi-user.target" ];
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after = [ "network.target" ];
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serviceConfig = {
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Type = "forking";
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ExecStart = let
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devices = utils.escapeSystemdExecArgs cfg.devices;
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extraArgs = utils.escapeSystemdExecArgs cfg.extraArgs;
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in ''
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${pkgs.gpsd}/sbin/gpsd -D "${toString cfg.debugLevel}" \
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-S "${toString cfg.port}" \
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${lib.optionalString cfg.readonly "-b"} \
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${lib.optionalString cfg.nowait "-n"} \
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${lib.optionalString cfg.listenany "-G"} \
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${extraArgs} \
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${devices}
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'';
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};
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};
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};
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}
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