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From 108c060c5521309b9448e3a7905b50dd505f36a8 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 | 4 ++++
 tmpfiles.d/etc.conf.m4 | 3 ---
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/resolve/resolved.c b/src/resolve/resolved.c
index deb75f9ae5..914d3b8a2d 100644
--- a/src/resolve/resolved.c
+++ b/src/resolve/resolved.c
@@ -67,6 +67,10 @@ int main(int argc, char *argv[]) {
                 goto finish;
         }
 
+        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 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.m4 b/tmpfiles.d/etc.conf.m4
index 064eae94f1..928105ea8d 100644
--- a/tmpfiles.d/etc.conf.m4
+++ b/tmpfiles.d/etc.conf.m4
@@ -13,9 +13,6 @@ L+ /etc/mtab - - - - ../proc/self/mounts
 m4_ifdef(`HAVE_SMACK_RUN_LABEL',
 t /etc/mtab - - - - security.SMACK64=_
 )m4_dnl
-m4_ifdef(`ENABLE_RESOLVED',
-L! /etc/resolv.conf - - - - ../usr/lib/systemd/resolv.conf
-)m4_dnl
 C /etc/nsswitch.conf - - - -
 m4_ifdef(`HAVE_PAM',
 C /etc/pam.d - - - -
-- 
2.9.2