[bug#73927] [PATCH 04/16] system: hurd: Add swap-services to hurd-default-essential-services.

[Janneke Nieuwenhuizen]

* gnu/services/base.scm (swap-service-type): Do not include 'udev' requirement
for the Hurd.  Use system* with "swapon", "swapoff" for the Hurd.
* gnu/system.scm (hurd-default-essential-services): Add swap-services.
* gnu/services/base.scm (swap-service-type):
---
 gnu/services/base.scm | 20 +++++++++++++-------
 gnu/system.scm        | 13 +++++++------
 2 files changed, 20 insertions(+), 13 deletions(-)

diff --git a/gnu/services/base.scm b/gnu/services/base.scm
index 819d063673..7c50bc45b1 100644
--- a/gnu/services/base.scm
+++ b/gnu/services/base.scm
@@ -43,6 +43,7 @@ (define-module (gnu services base)
   #:autoload   (guix diagnostics) (warning formatted-message &fix-hint)
   #:autoload   (guix i18n) (G_)
   #:use-module (guix combinators)
+  #:use-module (guix utils)
   #:use-module (gnu services)
   #:use-module (gnu services admin)
   #:use-module (gnu services shepherd)
@@ -2644,7 +2645,7 @@ (define swap-service-type
      (with-imported-modules (source-module-closure '((gnu build file-systems)))
        (shepherd-service
         (provision (list (swap->shepherd-service-name swap)))
-        (requirement `(udev ,@requirements))
+        (requirement `(,@(if (target-hurd?) '() '(udev)) ,@requirements))
         (documentation "Enable the given swap space.")
         (modules `((gnu build file-systems)
                    ,@%default-modules))
@@ -2652,16 +2653,21 @@ (define swap-service-type
                    (let ((device #$device-lookup))
                      (and device
                           (begin
-                            (restart-on-EINTR (swapon device
-                                                      #$(if (swap-space? swap)
-                                                            
(swap-space->flags-bit-mask
-                                                             swap)
-                                                            0)))
+                            #$(if (target-hurd?)
+                                  #~(system* "swapon" device)
+                                  #~(restart-on-EINTR
+                                     (swapon device
+                                             #$(if (swap-space? swap)
+                                                   (swap-space->flags-bit-mask
+                                                    swap)
+                                                   0))))
                             #t)))))
         (stop #~(lambda _
                   (let ((device #$device-lookup))
                     (when device
-                      (restart-on-EINTR (swapoff device)))
+                      #$(if (target-hurd?)
+                            #~(system* "swapoff" device)
+                            #~(restart-on-EINTR (swapoff device))))
                     #f)))
         (respawn? #f))))
    (description "Turn on the virtual memory swap area.")))
diff --git a/gnu/system.scm b/gnu/system.scm
index 44f93f91d1..187a72cbf5 100644
--- a/gnu/system.scm
+++ b/gnu/system.scm
@@ -843,11 +843,11 @@ (define (hurd-default-essential-services os)
   (let ((host-name    (operating-system-host-name os))
         (hosts-file   (%operating-system-hosts-file os))
         (entries      (operating-system-directory-base-entries os)))
-    (list (service system-service-type entries)
-          %boot-service
-          %hurd-startup-service
-          %activation-service
-          (service shepherd-root-service-type)
+    (cons* (service system-service-type entries)
+           %boot-service
+           %hurd-startup-service
+           %activation-service
+           (service shepherd-root-service-type)
 
           (service user-processes-service-type)
           (account-service (append (operating-system-accounts os)
@@ -869,7 +869,8 @@ (define (hurd-default-essential-services os)
           (service privileged-program-service-type
                    (append (operating-system-privileged-programs os)
                            (operating-system-setuid-programs os)))
-          (service profile-service-type (operating-system-packages os)))))
+          (service profile-service-type (operating-system-packages os))
+          (swap-services os))))
 
 (define* (operating-system-services os)
   "Return all the services of OS, including \"essential\" services."
-- 
2.46.0