Hello,

Generally the mcstransd works well on mls enabled system, but if 
"restart daemon" triggered, it will fail to trans the mls levels.

* To reproduce the issue:
1) apply attached patch: force-to-reload-translations.patch
2) build mcstransd and replace the one: "/sbin/mcstransd"
3) start the daemon and check results:

   $ run_init /etc/init.d/mcstrans start
   $ id -Z
   staff_u:lspp_test_r:lspp_harness_t:s0-s15:c0.c1023

   $ ps aux|grep mcs
   root      3004  0.0  0.0  14884   668 ?        Ss   09:37   0:00 
mcstransd
   root      3116  0.0  0.0 103252   832 pts/1    S+   10:39   0:00 grep mcs

   $ grep mcs /var/log/messages
   Jul 17 09:37:05 localhost mcstransd: mcstransd starting
   Jul 17 09:37:05 localhost mcstransd: Failed to initialize color 
translations
   Jul 17 09:37:05 localhost mcstransd: No color information will be 
available
   Jul 17 09:37:05 localhost mcstransd: mcstransd initialized
   Jul 17 09:37:05 localhost mcstransd: Reload Translations
   Jul 17 09:37:05 localhost mcstransd: cache sizes: tr = 26, rt = 26
   Jul 17 09:37:05 localhost mcstransd: Failed to initialize color 
translations
   Jul 17 09:37:05 localhost mcstransd: No color information will be 
available

I tested this on CentOS 6.5 with mls policy enabled.

* Why does it fail?

Check process_trans() in mcstrans.c:

  723 process_trans(char *buffer) {
  724         static domain_t *domain;
  [snip] ...
  784         if (!domain) {
  785                 domain = create_domain("Default");
  786                 if (!domain)
  787                         return -1;
  788                 group = NULL;
  789         }

As I think, the static pointer "domain" will be initialized when the 
daemon is starting, it will work well if that's all; But if "restart 
daemon" triggered after that, the point "domain" will have an old value 
but not NULL, this will prevent the create_domain() from running. In 
this case, an empty "domains" causes the translation failed.

I have a workaround to get it works: workaround-for-mcstransd.patch, but 
it's a bit ugly, I hope someone could give a better fix for it:)

Thanks
Wenzong