From 0c670fec00f3d5c103d9b7415d4e0510c61ad006 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
Date: Fri, 11 Mar 2016 17:06:17 -0500
Subject: [PATCH] resolved: create /etc/resolv.conf symlink at runtime

If the symlink doesn't exists, and we are being started, let's
create it to provie name resolution.

If it exists, do nothing. In particular, if it is a broken symlink,
we cannot really know if the administator configured it to point to
a location used by some service that hasn't started yet, so we
don't touch it in that case either.
  
https://bugzilla.redhat.com/show_bug.cgi?id=1313085
---
 src/resolve/resolved.c | 5 +++++
 tmpfiles.d/etc.conf.in | 3 ---
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/resolve/resolved.c b/src/resolve/resolved.c
index 50989a6b0a..95a51a574a 100644
--- a/src/resolve/resolved.c
+++ b/src/resolve/resolved.c
@@ -58,6 +58,11 @@ static int run(int argc, char *argv[]) {
                 if (r < 0)
                         return log_error_errno(r, "Could not create runtime directory: %m");
 
+                r = symlink("../run/systemd/resolve/resolv.conf", "/etc/resolv.conf");
+                if (r < 0 && errno != EEXIST)
+                        log_warning_errno(errno,
+                                          "Could not create /etc/resolv.conf symlink: %m");
+
                 /* Drop privileges, but keep three caps. Note that we drop two of those too, later on (see below) */
                 r = drop_privileges(uid, gid,
                                     (UINT64_C(1) << CAP_NET_RAW)|          /* needed for SO_BINDTODEVICE */
diff --git a/tmpfiles.d/etc.conf.in b/tmpfiles.d/etc.conf.in
index f82e0b82ce..66a777bdb2 100644
--- a/tmpfiles.d/etc.conf.in
+++ b/tmpfiles.d/etc.conf.in
@@ -12,9 +12,6 @@ L+ /etc/mtab - - - - ../proc/self/mounts
 {% if HAVE_SMACK_RUN_LABEL %}
 t /etc/mtab - - - - security.SMACK64=_
 {% endif %}
-{% if ENABLE_RESOLVE %}
-L! /etc/resolv.conf - - - - ../run/systemd/resolve/stub-resolv.conf
-{% endif %}
 C! /etc/nsswitch.conf - - - -
 {% if HAVE_PAM %}
 C! /etc/pam.d - - - -
-- 
2.23.0

