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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2018 Arun Isaac <arunisaac@systemreboot.net>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Guix is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
(define-module (gnu services security-token)
#:use-module (gnu services)
#:use-module (gnu services shepherd)
#:use-module (gnu packages admin)
#:use-module (gnu packages base)
#:use-module (gnu packages security-token)
#:use-module (gnu system shadow)
#:use-module (guix gexp)
#:use-module (guix modules)
#:use-module (guix records)
#:use-module (ice-9 match)
#:use-module (srfi srfi-26)
#:export (pcscd-configuration
pcscd-configuration?
pcscd-configuration-pcsc-lite
pcscd-configuration-usb-drivers
pcscd-service-type))
;;;
;;; PC/SC Smart Card Daemon
;;;
(define-record-type* <pcscd-configuration>
pcscd-configuration make-pcscd-configuration pcscd-configuration?
(pcsc-lite pcscd-configuration-pcsc-lite
(default pcsc-lite))
(usb-drivers pcscd-configuration-usb-drivers
(default (list ccid))))
(define pcscd-shepherd-service
(match-lambda
(($ <pcscd-configuration> pcsc-lite)
(with-imported-modules (source-module-closure
'((gnu build shepherd)))
(shepherd-service
(documentation "PC/SC Smart Card Daemon")
(provision '(pcscd))
(requirement '(syslogd))
(modules '((gnu build shepherd)))
(start #~(lambda _
(invoke #$(file-append pcsc-lite "/sbin/pcscd"))
(call-with-input-file "/var/run/pcscd/pcscd.pid" read)))
(stop #~(make-kill-destructor)))))))
(define pcscd-activation
(match-lambda
(($ <pcscd-configuration> pcsc-lite usb-drivers)
(with-imported-modules (source-module-closure
'((guix build utils)))
#~(begin
(use-modules (guix build utils))
;; XXX: We can't use (guix utils) because it requires a
;; dynamically-linked Guile, hence the duplicate switch-symlinks.
(define (switch-symlinks link target)
(let ((pivot (string-append link ".new")))
(symlink target pivot)
(rename-file pivot link)))
(mkdir-p "/var/lib")
(switch-symlinks "/var/lib/pcsc"
#$(directory-union
"pcsc"
(map (cut file-append <> "/pcsc")
usb-drivers))))))))
(define pcscd-service-type
(service-type
(name 'pcscd)
(description
"Run @command{pcscd}, the PC/SC smart card daemon.")
(extensions
(list (service-extension shepherd-root-service-type
(compose list pcscd-shepherd-service))
(service-extension activation-service-type
pcscd-activation)))
(default-value (pcscd-configuration))))
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