samba_dnsupdate: Do not rewrite krb5.conf in selftest

The samba_dnsupdate script is responsible to provision the DNS entries.
The private krb5.conf uses dns lookups to find the KDC to acquire a
Kerberos ticket.  Obviously this will fail because currently we are are
in the process of adding the DNS entries for the KDC.

If we are inside of selftest we need to use the krb5.conf created by
selftest itself.

Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlet <abartlet@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>

diff --git a/source4/scripting/bin/samba_dnsupdate b/source4/scripting/bin/samba_dnsupdate
index f9e835bc5c3bc6a3f07d5fdeed2b123332779d76..d382758168b68e645db2548ad820a87a6a2f2dac 100755 (executable)
--- a/source4/scripting/bin/samba_dnsupdate
+++ b/source4/scripting/bin/samba_dnsupdate
@@ -662,10 +662,13 @@ if opts.update_cache:
 else:
     dns_update_cache = lp.private_path('dns_update_cache')
 
-# use our private krb5.conf to avoid problems with the wrong domain
-# bind9 nsupdate wants the default domain set
-krb5conf = lp.private_path('krb5.conf')
-os.environ['KRB5_CONFIG'] = krb5conf
+krb5conf = None
+# only change the krb5.conf if we are not in selftest
+if 'SOCKET_WRAPPER_DIR' not in os.environ:
+    # use our private krb5.conf to avoid problems with the wrong domain
+    # bind9 nsupdate wants the default domain set
+    krb5conf = lp.private_path('krb5.conf')
+    os.environ['KRB5_CONFIG'] = krb5conf
 
 file = open(dns_update_list, "r")