bug#25850: [PATCH] services: Create /var/log upon activation

[Christopher Baines]

When launching a container created with guix system container, the
attempt to create /var/log/wtmp would fail, as /var/log did not exist.

* gnu/services.scm (activation-script): Create /var/log
---
 gnu/services.scm | 1 +
 1 file changed, 1 insertion(+)

diff --git a/gnu/services.scm b/gnu/services.scm
index 6ac4f1322..15a0f2f89 100644
--- a/gnu/services.scm
+++ b/gnu/services.scm
@@ -345,6 +345,7 @@ ACTIVATION-SCRIPT-TYPE."
 
                       ;; Same for 'wtmp', which is populated by mingetty et
                       ;; al.
+                      (if (not (file-exists? "/var/log")) (mkdir "/var/log"))
                       (close-port (open-file "/var/log/wtmp" "a0"))
 
                       ;; Set up /run/current-system.  Among other things this
-- 
2.11.1