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-rw-r--r--gnu/system/dmd.scm30
1 files changed, 28 insertions, 2 deletions
diff --git a/gnu/system/dmd.scm b/gnu/system/dmd.scm
index df38172def..aec7d03759 100644
--- a/gnu/system/dmd.scm
+++ b/gnu/system/dmd.scm
@@ -266,10 +266,13 @@ true, it must be a string specifying the default network gateway."
'())))))))
-(define (dmd-configuration-file services)
- "Return the dmd configuration file for SERVICES."
+(define (dmd-configuration-file services etc)
+ "Return the dmd configuration file for SERVICES, that initializes /etc from
+ETC on startup."
(define config
`(begin
+ (use-modules (ice-9 ftw))
+
(register-services
,@(map (match-lambda
(($ <service> documentation provision requirement
@@ -282,6 +285,29 @@ true, it must be a string specifying the default network gateway."
#:start ,start
#:stop ,stop)))
services))
+
+ ;; /etc is a mixture of static and dynamic settings. Here is where we
+ ;; initialize it from the static part.
+ (format #t "populating /etc from ~a...~%" ,etc)
+ (let ((rm-f (lambda (f)
+ (false-if-exception (delete-file f)))))
+ (rm-f "/etc/static")
+ (symlink ,etc "/etc/static")
+ (for-each (lambda (file)
+ ;; TODO: Handle 'shadow' specially so that changed
+ ;; password aren't lost.
+ (let ((target (string-append "/etc/" file))
+ (source (string-append "/etc/static/" file)))
+ (rm-f target)
+ (symlink source target)))
+ (scandir ,etc
+ (lambda (file)
+ (not (member file '("." ".."))))))
+
+ ;; Prevent ETC from being GC'd.
+ (symlink ,etc "/var/nix/gcroots/etc-directory"))
+
+ (format #t "starting services...~%")
(for-each start ',(append-map service-provision services))))
(text-file "dmd.conf" (object->string config)))