01/03: environment: container: Work around read-only /etc/resolv.conf issue.

[David Thompson]

davexunit pushed a commit to branch master
in repository guix.

commit fe463dbcf7093746af541f85af4081c766e0cbed
Author: David Thompson <address@hidden>
Date:   Thu Mar 31 15:43:18 2016 -0400

    environment: container: Work around read-only /etc/resolv.conf issue.
    
    * guix/scripts/environment.scm (launch-environment/container): Mount
    /etc/resolv.conf as a writable file.
---
 guix/scripts/environment.scm |   10 +++++++++-
 1 files changed, 9 insertions(+), 1 deletions(-)

diff --git a/guix/scripts/environment.scm b/guix/scripts/environment.scm
index 0ec2c5d..d4c09ef 100644
--- a/guix/scripts/environment.scm
+++ b/guix/scripts/environment.scm
@@ -406,7 +406,15 @@ host file systems to mount inside the container."
                                             (file-system-mapping
                                              (source file)
                                              (target file)
-                                             (writable? #f))))
+                                             ;; XXX: On some GNU/Linux
+                                             ;; systems, /etc/resolv.conf is a
+                                             ;; symlink to a file in a tmpfs
+                                             ;; which, for an unknown reason,
+                                             ;; cannot be bind mounted
+                                             ;; read-only within the
+                                             ;; container.
+                                             (writable?
+                                              (string=? "/etc/resolv.conf")))))
                                      %network-configuration-files)
                          '())
                      ;; Mappings for the union closure of all inputs.