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|
{ config, lib, pkgs, ... }:
with lib;
let
uid = config.ids.uids.gpsd;
gid = config.ids.gids.gpsd;
cfg = config.services.gpsd;
in
{
###### interface
options = {
services.gpsd = {
enable = mkOption {
type = types.bool;
default = false;
description = ''
Whether to enable `gpsd', a GPS service daemon.
'';
};
device = mkOption {
type = types.str;
default = "/dev/ttyUSB0";
description = ''
A device may be a local serial device for GPS input, or a URL of the form:
<literal>[{dgpsip|ntrip}://][user:passwd@]host[:port][/stream]</literal>
in which case it specifies an input source for DGPS or ntrip data.
'';
};
readonly = mkOption {
type = types.bool;
default = true;
description = ''
Whether to enable the broken-device-safety, otherwise
known as read-only mode. Some popular bluetooth and USB
receivers lock up or become totally inaccessible when
probed or reconfigured. This switch prevents gpsd from
writing to a receiver. This means that gpsd cannot
configure the receiver for optimal performance, but it
also means that gpsd cannot break the receiver. A better
solution would be for Bluetooth to not be so fragile. A
platform independent method to identify
serial-over-Bluetooth devices would also be nice.
'';
};
nowait = mkOption {
type = types.bool;
default = false;
description = ''
don't wait for client connects to poll GPS
'';
};
port = mkOption {
type = types.port;
default = 2947;
description = ''
The port where to listen for TCP connections.
'';
};
debugLevel = mkOption {
type = types.int;
default = 0;
description = ''
The debugging level.
'';
};
};
};
###### implementation
config = mkIf cfg.enable {
users.users.gpsd =
{ inherit uid;
group = "gpsd";
description = "gpsd daemon user";
home = "/var/empty";
};
users.groups.gpsd = { inherit gid; };
systemd.services.gpsd = {
description = "GPSD daemon";
wantedBy = [ "multi-user.target" ];
after = [ "network.target" ];
serviceConfig = {
Type = "forking";
ExecStart = ''
${pkgs.gpsd}/sbin/gpsd -D "${toString cfg.debugLevel}" \
-S "${toString cfg.port}" \
${optionalString cfg.readonly "-b"} \
${optionalString cfg.nowait "-n"} \
"${cfg.device}"
'';
};
};
};
}
|