Recreate /etc/resolv.conf if NetworkManager screwed it up (#1475279)

dhclient-script

@@ -85,7 +85,7 @@ eventually_add_hostnames_domain_to_search() {
        done
 
        if [ "${is_in}" = "false" ]; then
-          # Add domain name to search list (#637763)
+           # Add domain name to search list (#637763)
           sed -i -e "s/${search}/${search} ${domain}/" "${RESOLVCONF}"
        fi
     fi
@@ -728,6 +728,20 @@ get_hwaddr ()
     fi
 }
 
+validate_resolv_conf()
+{
+    # It's possible to have broken symbolic link $RESOLVCONF -> <some_nm_dir>
+    # https://bugzilla.redhat.com/1475279
+    # Remove broken link and hope NM will survive
+    if [ -h "${RESOLVCONF}" -a ! -e "${RESOLVCONF}" ];
+    then
+        logmessage "${RESOLVCONF) is broken symlink. Recreating..."
+        unlink "${RESOLVCONF}"
+        touch "${RESOLVCONF}"
+    fi;
+}
+
+
 get_config_by_hwaddr ()
 {
     LANG=C grep -il "^[[:space:]]*HWADDR=\"\?${1}\"\?\([[:space:]#]\|$\)" /etc/sysconfig/network-scripts/ifcfg-* \
@@ -787,6 +801,8 @@ source_config ()
 run_hook "${ETCDIR}/dhclient-enter-hooks" || exit $?
 run_hookdir "${ETCDIR}/dhclient-enter-hooks.d" || exit $?
 
+[ "${PEERDNS}" = "no" ] || validate_resilv_conf()
+
 if [ -f /etc/sysconfig/network ]; then
     . /etc/sysconfig/network
 fi

dhcp.spec

@@ -20,7 +20,7 @@ Summary:  Dynamic host configuration protocol software
 Name:     dhcp
 Version:  4.3.6
 %global VERSION %%{version}%%{prever}
-Release:  2%{?dist}
+Release:  3%{?dist}
 # NEVER CHANGE THE EPOCH on this package.  The previous maintainer (prior to
 # dcantrell maintaining the package) made incorrect use of the epoch and
 # that's why it is at 12 now.  It should have never been used, but it was.
@@ -661,9 +661,14 @@ done
 %endif
 
 %changelog
+
+* Thu Jul 27 2017 Pavel Zhukov <pzhukov@redhat.com> - 12:4.3.6-3
+- Recreate /etc/resolv.conf if NetworkManager screwed it up (#1475279)
+
 * Wed Jul 26 2017 Fedora Release Engineering <releng@fedoraproject.org> - 12:4.3.6-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_27_Mass_Rebuild
 
+
 * Fri Jul 14 2017 Pavel Zhukov <pzhukov@redhat.com> - 12:4.3.6-1
 - New version 4.3.6