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nixpkgs/nixos/modules/services/hardware/pcscd.nix
aszlig 9720e16adc
nixos/pcscd: Improve and clean up module
So far the module only allowed for the ccid driver, but there are a lot
of other PCSC driver modules out there, so let's add an option called
"plugins", which boils down to a store path that links together all the
paths specified.

We don't need to create stuff in /var/lib/pcsc anymore, because we
patched pcsclite to allow setting PCSCLITE_HP_DROPDIR.

Another new option is readerConfig, which is especially useful for
non-USB readers that aren't autodetected.

The systemd service now is no longer Type=forking, because we're now
passing the -f (foreground) option to pcscd.

Tested against a YubiKey 4, SCR335 and a REINER SCT USB reader.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>
Cc: @wkennington
2016-06-04 16:39:19 +02:00

70 lines
1.7 KiB
Nix

{ config, lib, pkgs, ... }:
with lib;
let
cfgFile = pkgs.writeText "reader.conf" config.services.pcscd.readerConfig;
pluginEnv = pkgs.buildEnv {
name = "pcscd-plugins";
paths = map (p: "${p}/pcsc/drivers") config.services.pcscd.plugins;
};
in {
###### interface
options = {
services.pcscd = {
enable = mkEnableOption "PCSC-Lite daemon";
plugins = mkOption {
type = types.listOf types.package;
default = [ pkgs.ccid ];
defaultText = "[ pkgs.ccid ]";
example = literalExample "[ pkgs.pcsc-cyberjack ]";
description = "Plugin packages to be used for PCSC-Lite.";
};
readerConfig = mkOption {
type = types.lines;
default = "";
example = ''
FRIENDLYNAME "Some serial reader"
DEVICENAME /dev/ttyS0
LIBPATH /path/to/serial_reader.so
CHANNELID 1
'';
description = ''
Configuration for devices that aren't hotpluggable.
See <citerefentry><refentrytitle>reader.conf</refentrytitle>
<manvolnum>5</manvolnum></citerefentry> for valid options.
'';
};
};
};
###### implementation
config = mkIf config.services.pcscd.enable {
systemd.sockets.pcscd = {
description = "PCSC-Lite Socket";
wantedBy = [ "sockets.target" ];
before = [ "multi-user.target" ];
socketConfig.ListenStream = "/run/pcscd/pcscd.comm";
};
systemd.services.pcscd = {
description = "PCSC-Lite daemon";
environment.PCSCLITE_HP_DROPDIR = pluginEnv;
serviceConfig = {
ExecStart = "${pkgs.pcsclite}/sbin/pcscd -f -x -c ${cfgFile}";
ExecReload = "${pkgs.pcsclite}/sbin/pcscd -H";
};
};
};
}