Remove world-writability from per-user directories

'nix-daemon' now creates subdirectories for users when they first
connect.

Fixes #509 (CVE-2019-17365).
Should also fix #3127.

(cherry picked from commit 5a303093dcae1e5ce9212616ef18f2ca51020b0d)

1 files changed, 3 insertions, 0 deletions

diff --git a/src/libstore/store-api.hh b/src/libstore/store-api.hh
index 7fb568602091..ba8990755675 100644
--- a/src/libstore/store-api.hh
+++ b/src/libstore/store-api.hh
@@ -628,6 +628,9 @@ public:
         return storePath;
     }
 
+    virtual void createUser(const std::string & userName, uid_t userId)
+    { }
+
 protected:
 
     Stats stats;