From: Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>
Date: Fri, 11 Mar 2016 22:06:17 +0000 (-0500)
Subject: resolved: create /etc/resolv.conf symlink at runtime
X-Git-Tag: v239-8
X-Git-Url: http://git.ipfire.org/gitweb/?a=commitdiff_plain;h=e0f2dd42fb02aa5767d38714c95ac10fb683ad67;p=thirdparty%2Fsystemd.git

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
---

diff --git a/src/resolve/resolved.c b/src/resolve/resolved.c
index c01e53e9daf..f3d96df4589 100644
--- a/src/resolve/resolved.c
+++ b/src/resolve/resolved.c
@@ -53,6 +53,10 @@ int main(int argc, char *argv[]) {
         /* Drop privileges, but only if we have been started as root. If we are not running as root we assume all
          * privileges are already dropped. */
         if (getuid() == 0) {
+                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,
diff --git a/tmpfiles.d/etc.conf.m4 b/tmpfiles.d/etc.conf.m4
index df8d42101ca..928105ea8dc 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_RESOLVE',
-L! /etc/resolv.conf - - - - ../run/systemd/resolve/stub-resolv.conf
-)m4_dnl
 C /etc/nsswitch.conf - - - -
 m4_ifdef(`HAVE_PAM',
 C /etc/pam.d - - - -