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73 lines
2.1 KiB
Nix
73 lines
2.1 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfgFile = pkgs.writeText "reader.conf" config.services.pcscd.readerConfig;
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pluginEnv = pkgs.buildEnv {
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name = "pcscd-plugins";
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paths = map (p: "${p}/pcsc/drivers") config.services.pcscd.plugins;
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};
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in
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{
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###### interface
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options.services.pcscd = {
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enable = mkEnableOption (lib.mdDoc "PCSC-Lite daemon");
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plugins = mkOption {
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type = types.listOf types.package;
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default = [ pkgs.ccid ];
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defaultText = literalExpression "[ pkgs.ccid ]";
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example = literalExpression "[ pkgs.pcsc-cyberjack ]";
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description = lib.mdDoc "Plugin packages to be used for PCSC-Lite.";
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};
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readerConfig = mkOption {
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type = types.lines;
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default = "";
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example = ''
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FRIENDLYNAME "Some serial reader"
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DEVICENAME /dev/ttyS0
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LIBPATH /path/to/serial_reader.so
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CHANNELID 1
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'';
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description = lib.mdDoc ''
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Configuration for devices that aren't hotpluggable.
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See {manpage}`reader.conf(5)` for valid options.
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'';
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};
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};
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###### implementation
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config = mkIf config.services.pcscd.enable {
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environment.etc."reader.conf".source = cfgFile;
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environment.systemPackages = [ pkgs.pcsclite ];
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systemd.packages = [ (getBin pkgs.pcsclite) ];
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systemd.sockets.pcscd.wantedBy = [ "sockets.target" ];
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systemd.services.pcscd = {
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environment.PCSCLITE_HP_DROPDIR = pluginEnv;
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restartTriggers = [ "/etc/reader.conf" ];
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# If the cfgFile is empty and not specified (in which case the default
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# /etc/reader.conf is assumed), pcscd will happily start going through the
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# entire confdir (/etc in our case) looking for a config file and try to
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# parse everything it finds. Doesn't take a lot of imagination to see how
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# well that works. It really shouldn't do that to begin with, but to work
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# around it, we force the path to the cfgFile.
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#
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# https://github.com/NixOS/nixpkgs/issues/121088
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serviceConfig.ExecStart = [ "" "${getBin pkgs.pcsclite}/bin/pcscd -f -x -c ${cfgFile}" ];
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};
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};
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}
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