109 lines
2.7 KiB
Nix
109 lines
2.7 KiB
Nix
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{pkgs, config, ...}:
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###### interface
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let
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inherit (pkgs.lib) mkOption mkIf;
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uid = (import ../system/ids.nix).uids.gpsd;
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gid = (import ../system/ids.nix).gids.gpsd;
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options = {
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services = {
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gpsd = {
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enable = mkOption {
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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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device = mkOption {
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default = "/dev/ttyUSB0";
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description = ''
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A device may be a local serial device for GPS input, or a URL of the form:
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<literal>[{dgpsip|ntrip}://][user:passwd@]host[:port][/stream]</literal>
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in which case it specifies an input source for DGPS or ntrip data.
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'';
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};
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readonly = mkOption {
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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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port = mkOption {
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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 = mkOption {
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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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};
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};
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};
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in
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###### implementation
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mkIf config.services.gpsd.enable {
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require = [
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options
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];
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users = {
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extraUsers = [
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{ name = "gpsd";
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inherit uid;
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description = "gpsd daemon user";
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home = "/var/empty";
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}
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];
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extraGroups = [
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{ name = "gpsd";
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inherit gid;
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}
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];
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};
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services =
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let cfg = config.services.gpsd; in {
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extraJobs = [{
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name = "gpsd";
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job =
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let gpsd = pkgs.gpsd;
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in ''
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description "GPSD daemon"
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start on network-interfaces/started
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stop on network-interfaces/stop
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respawn ${gpsd}/sbin/gpsd -D "${toString cfg.debugLevel}" \
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-S "${toString cfg.port}" \
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${if cfg.readonly then "-b" else ""} \
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"${cfg.device}"
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'';
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}];
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};
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}
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