services: Add samba service.

* gnu/services/samba.scm: New file.
* gnu/tests/samba.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add them.
* po/guix/POTFILES.in Add 'gnu/services/samba.scm'.
* doc/guix.texi: Document it.

Signed-off-by: Lars-Dominik Braun <lars@6xq.net>

3 files changed, 342 insertions, 0 deletions

diff --git a/gnu/local.mk b/gnu/local.mk
index d99c650d1a..140845a7c6 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -682,6 +682,7 @@ GNU_SYSTEM_MODULES =				\
   %D%/services/herd.scm				\
   %D%/services/pm.scm				\
   %D%/services/rsync.scm			\
+  %D%/services/samba.scm			\
   %D%/services/sddm.scm				\
   %D%/services/spice.scm				\
   %D%/services/ssh.scm				\
@@ -761,6 +762,7 @@ GNU_SYSTEM_MODULES =				\
   %D%/tests/package-management.scm		\
   %D%/tests/reconfigure.scm			\
   %D%/tests/rsync.scm				\
+  %D%/tests/samba.scm				\
   %D%/tests/security.scm			\
   %D%/tests/security-token.scm			\
   %D%/tests/singularity.scm			\
diff --git a/gnu/services/samba.scm b/gnu/services/samba.scm
new file mode 100644
index 0000000000..2c9e52a0b0
--- /dev/null
+++ b/gnu/services/samba.scm
@@ -0,0 +1,182 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2022 Simon Streit <simon@netpanic.org>
+;;;
+;;; 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 samba)
+
+  #:use-module (gnu packages)
+  #:use-module (gnu packages base)
+  #:use-module (gnu packages admin)
+  #:use-module (gnu packages samba)
+
+  #:use-module (gnu services)
+  #:use-module (gnu services configuration)
+  #:use-module (gnu services shepherd)
+  #:use-module (gnu services base)
+  #:use-module (gnu system shadow)
+
+  #:use-module (guix gexp)
+  #:use-module (guix packages)
+  #:use-module (guix modules)
+  #:use-module (guix records)
+
+  #:use-module (ice-9 format)
+  #:use-module (ice-9 match)
+  #:use-module (ice-9 textual-ports)
+  #:use-module (srfi srfi-1)
+
+  #:export (samba-service-type
+            samba-configuration
+            samba-smb-conf))
+
+(define %smb-conf
+  (plain-file "smb.conf" "[global]
+    workgroup = WORKGROUP
+    server string = Samba Server
+    server role = standalone server
+    log file = /var/log/samba/log.%m
+    logging = file
+"))
+
+(define-record-type* <samba-configuration>
+  samba-configuration
+  make-samba-configuration
+  samba-configuration?
+  (package              samba-configuration-package
+                        (default samba))
+  (config-file          samba-configuration-config-file
+                        (default #f))
+  (enable-samba?        samba-configuration-enable-samba?
+                        (default #f))
+  (enable-smbd?         samba-configuration-enable-smbd?
+                        (default #t))
+  (enable-nmbd?         samba-configuration-enable-nmbd?
+                        (default #t))
+  (enable-winbindd?     samba-configuration-enable-winbindd?
+                        (default #t)))
+
+(define (samba-activation config)
+  (let ((package (samba-configuration-package config))
+        (config-file (samba-configuration-config-file config)))
+    (with-imported-modules '((guix build utils))
+      (let ((lib-dir "/var/lib/samba")
+            (log-dir "/var/log/samba")
+            (run-dir "/var/run/samba")
+            (lock-dir "/var/lock/samba")
+            (cache-dir "/var/cache/samba")
+            (etc-dir "/etc/samba")
+            (smb.conf "/etc/samba/smb.conf"))
+        #~(begin
+            (use-modules (guix build utils))
+            (mkdir-p #$etc-dir)
+            (mkdir-p #$lib-dir)
+            (mkdir-p/perms (string-append #$lib-dir "/private")
+                           (getpwnam "root") #o700)
+            (mkdir-p #$log-dir)
+            (mkdir-p #$run-dir)
+            (mkdir-p #$lock-dir)
+            (mkdir-p #$cache-dir)
+            (copy-file #$config-file #$smb.conf)
+            (invoke #$(file-append package "/bin/testparm")
+                    "--suppress-prompt" #$smb.conf))))))
+
+(define (samba-samba-shepherd-service config)
+  (let ((package (samba-configuration-package config))
+        (config-file (samba-configuration-config-file config)))
+       (list (shepherd-service
+              (documentation "Run Samba")
+              (provision '(samba-samba))
+              (requirement '(networking))
+              (start #~(make-forkexec-constructor
+                        (list #$(file-append package "/sbin/samba")
+                              (string-append "--configfile=" #$config-file)
+                              "--foreground"
+                              "--no-process-group")))
+              (stop #~(make-kill-destructor))))))
+
+(define (samba-nmbd-shepherd-service config)
+  (let ((package (samba-configuration-package config))
+        (config-file (samba-configuration-config-file config)))
+       (list (shepherd-service
+              (documentation "Run NMBD")
+              (provision '(samba-nmbd))
+              (requirement '(networking))
+              (start #~(make-forkexec-constructor
+                        (list #$(file-append package "/sbin/nmbd")
+                              (string-append "--configfile=" #$config-file)
+                              "--foreground"
+                              "--no-process-group")))
+              (stop #~(make-kill-destructor))))))
+
+(define (samba-smbd-shepherd-service config)
+  (let ((package (samba-configuration-package config))
+        (config-file (samba-configuration-config-file config)))
+       (list (shepherd-service
+              (documentation "Run SMBD")
+              (provision '(samba-smbd))
+              (requirement '(networking))
+              (start #~(make-forkexec-constructor
+                        (list #$(file-append package "/sbin/smbd")
+                              (string-append "--configfile=" #$config-file)
+                              "--foreground"
+                              "--no-process-group")))
+              (stop #~(make-kill-destructor))))))
+
+(define (samba-winbindd-shepherd-service config)
+  (let ((package (samba-configuration-package config))
+        (config-file (samba-configuration-config-file config)))
+       (list (shepherd-service
+              (documentation "Run Winnbindd for Name Service Switch")
+              (provision '(samba-winbindd))
+              (requirement '(networking))
+              (start #~(make-forkexec-constructor
+                        (list #$(file-append package "/sbin/winbindd")
+                              (string-append "--configfile=" #$config-file)
+                              "--foreground"
+                              "--no-process-group")))
+              (stop #~(make-kill-destructor))))))
+
+(define (samba-shepherd-services config)
+  (append (if (samba-configuration-enable-samba? config)
+              (samba-samba-shepherd-service config)
+              '())
+          (if (samba-configuration-enable-nmbd? config)
+              (samba-nmbd-shepherd-service config)
+              '())
+          (if (samba-configuration-enable-smbd? config)
+              (samba-smbd-shepherd-service config)
+              '())
+          (if (samba-configuration-enable-winbindd? config)
+              (samba-winbindd-shepherd-service config)
+              '())))
+
+(define samba-service-type
+  (service-type
+   (name 'samba)
+   (description "Run @uref{https://www.samba.org/, Samba}, a network file and
+print service for all clients using the SMB/CIFS protocol.  Samba is an
+important component to seamlessly integrate Linux/Unix Servers and Desktops
+into Active Directory environments.  It can function both as a domain
+controller or as a regular domain member.")
+   (extensions
+    (list (service-extension shepherd-root-service-type
+                             samba-shepherd-services)
+          (service-extension activation-service-type
+                             samba-activation)
+          (service-extension profile-service-type
+                             (compose list samba-configuration-package))))
+   (default-value (samba-configuration))))
diff --git a/gnu/tests/samba.scm b/gnu/tests/samba.scm
new file mode 100644
index 0000000000..27d7ea49c3
--- /dev/null
+++ b/gnu/tests/samba.scm
@@ -0,0 +1,158 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2022 Simon Streit <simon@netpanic.org>
+;;;
+;;; 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 tests samba)
+  #:use-module (gnu tests)
+  #:use-module (gnu system)
+  #:use-module (gnu system vm)
+  #:use-module (gnu services)
+  #:use-module (gnu services networking)
+  #:use-module (gnu services samba)
+  #:use-module (gnu packages samba)
+  #:use-module (guix gexp)
+  #:use-module (guix store)
+  #:export (%test-samba))
+
+
+;;;
+;;; The Samba service.
+;;;
+
+(define %samba-os
+  (let ((base-os (simple-operating-system
+                  (simple-service 'create-target-directory activation-service-type
+                                  #~(begin
+                                      (mkdir-p "/srv/samba/guest")
+                                      (chown "/srv/samba/guest"
+                                             (passwd:uid (getpw "nobody"))
+                                             (passwd:gid (getpw "nobody")))))
+                  (service dhcp-client-service-type)
+                  (service samba-service-type
+                           (samba-configuration
+                            (config-file (plain-file "smb.conf" "
+[global]
+    workgroup = WORKGROUP
+    server string = Samba Server
+    server role = standalone server
+    log file = /var/log/samba/log.%m
+    logging = file
+
+[guest]
+    path = /srv/samba/guest
+    read only = no
+    guest ok = yes
+    guest only = yes
+")))))))
+    (operating-system
+      (inherit base-os)
+      (packages (cons samba (operating-system-packages base-os))))))
+
+(define* (run-samba-test)
+  "Return a test of an OS running Samba service."
+
+  (define vm
+    (virtual-machine
+     (operating-system (marionette-operating-system
+                        %samba-os
+                        #:imported-modules '((gnu services herd))))
+     (port-forwardings '((8135 . 135)
+                         (8137 . 137)
+                         (8138 . 138)
+                         (8445 . 445)))))
+
+  (define test
+    (with-imported-modules '((gnu build marionette))
+      #~(begin
+          (use-modules (gnu build marionette)
+                       (srfi srfi-26)
+                       (srfi srfi-64))
+
+          (define marionette
+            (make-marionette '(#$vm)))
+
+          (test-runner-current (system-test-runner #$output))
+          (test-begin "samba")
+
+          (test-assert "samba-smbd running"
+            (marionette-eval
+             '(begin
+                (use-modules (gnu services herd))
+                (start-service 'samba-smbd))
+             marionette))
+
+          (test-assert "samba-nmbd running"
+            (marionette-eval
+             '(begin
+                (use-modules (gnu services herd))
+                (start-service 'samba-nmbd))
+             marionette))
+
+          (test-assert "samba-winbindd running"
+            (marionette-eval
+             '(begin
+                (use-modules (gnu services herd))
+                (start-service 'samba-winbindd))
+             marionette))
+
+          (test-assert "smbd service process id"
+            (let ((pid
+                   (number->string (wait-for-file "/var/run/samba/smbd.pid"
+                                                  marionette))))
+              (marionette-eval `(file-exists? (string-append "/proc/" ,pid))
+                               marionette)))
+
+          (test-assert "nmbd service process id"
+            (let ((pid
+                   (number->string (wait-for-file "/var/run/samba/nmbd.pid"
+                                                  marionette))))
+              (marionette-eval `(file-exists? (string-append "/proc/" ,pid))
+                               marionette)))
+
+          (test-assert "winbindd service process id"
+            (let ((pid
+                   (number->string (wait-for-file "/var/run/samba/winbindd.pid"
+                                                  marionette))))
+              (marionette-eval `(file-exists? (string-append "/proc/" ,pid))
+                               marionette)))
+
+          (test-assert "samba-smbd is listening for peers"
+            (wait-for-tcp-port 445 marionette))
+
+          (test-equal "smbclient connect"
+            0
+            (marionette-eval
+             '(system* #$(file-append samba "/bin/smbclient")
+                       "--list=localhost" "--no-pass")
+             marionette))
+
+          (test-equal "smbclient connect"
+            0
+            (marionette-eval
+             '(system* #$(file-append samba "/bin/smbclient")
+                       "--list=localhost" "--no-pass")
+             marionette))
+
+          (test-end))))
+
+  (gexp->derivation "samba-test" test))
+
+(define %test-samba
+  (system-test
+   (name "samba")
+   (description "Connect to a running Samba daemon.")
+   (value (run-samba-test))))