Introduce cron_admin interface

---
Changes from v1:
allow admin of cronjob_t domain.
user cronjob domains are unchanged and not allowed

 cron.if | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)

cron.if +53 -0

index cc225d1..a76e902 100644
@@ -838,3 +838,56 @@ interface(`cron_dontaudit_write_system_job_tmp_files',`
 
 	dontaudit $1 system_cronjob_tmp_t:file write_file_perms;
 ')
+
+########################################
+## <summary>
+##	All of the rules required to
+##	administrate a cron environment.
+## </summary>
+## <param name="domain">
+##	<summary>
+##	Domain allowed access.
+##	</summary>
+## </param>
+## <param name="role">
+##	<summary>
+##	Role allowed access.
+##	</summary>
+## </param>
+## <rolecap/>
+#
+interface(`cron_admin',`
+	gen_require(`
+		type crond_t, cronjob_t, crond_initrc_exec_t;
+		type cron_var_lib_t, system_cronjob_var_lib_t;
+		type crond_tmp_t, admin_crontab_tmp_t;
+		type crontab_tmp_t, system_cronjob_tmp_t;
+		type cron_var_run_t, system_cronjob_var_run_t, crond_var_run_t;
+		type cron_log_t, system_cronjob_lock_t, user_cron_spool_log_t;
+		attribute cron_spool_type;
+	')
+
+	allow $1 { crond_t cronjob_t }:process { ptrace signal_perms };
+	ps_process_pattern($1, { crond_t cronjob_t })
+
+	init_startstop_service($1, $2, crond_t, crond_initrc_exec_t)
+
+	files_search_var_lib($1)
+	admin_pattern($1, { cron_var_lib_t system_cronjob_var_lib_t })
+
+	files_search_tmp($1)
+	admin_pattern($1, { crond_tmp_t admin_crontab_tmp_t })
+	admin_pattern($1, { crontab_tmp_t system_cronjob_tmp_t })
+
+	files_search_pids($1)
+	admin_pattern($1, { cron_var_run_t crond_var_run_t system_cronjob_var_run_t })
+
+	files_search_locks($1)
+	admin_pattern($1, system_cronjob_lock_t)
+
+	logging_search_logs($1)
+	admin_pattern($1, { cron_log_t user_cron_spool_log_t })
+
+	files_search_spool($1)
+	admin_pattern($1, cron_spool_type)
+')