Added rpl_status. This is a midway commit to be able to pull so I can save

myself a run of compile-pentium-debug. I have not even tried to compile the 
new code

sql/Makefile.am

@@ -82,7 +82,7 @@ mysqld_SOURCES =	sql_lex.cc sql_handler.cc \
 			sql_udf.cc sql_analyse.cc sql_analyse.h sql_cache.cc \
 			slave.cc sql_repl.cc sql_union.cc \
 			mini_client.cc mini_client_errors.c \
-			stacktrace.c 
+			stacktrace.c repl_failsafe.h repl_failsafe.cc
 gen_lex_hash_SOURCES =	gen_lex_hash.cc
 gen_lex_hash_LDADD =	$(LDADD) $(CXXLDFLAGS)
 

sql/mysqld.cc

@@ -21,6 +21,7 @@
 #include "sql_acl.h"
 #include "slave.h"
 #include "sql_repl.h"
+#include "repl_failsafe.h"
 #include "stacktrace.h"
 #ifdef HAVE_BERKELEY_DB
 #include "ha_berkeley.h"
@@ -1698,6 +1699,7 @@ int main(int argc, char **argv)
   (void) pthread_mutex_init(&LOCK_slave, MY_MUTEX_INIT_FAST);
   (void) pthread_mutex_init(&LOCK_server_id, MY_MUTEX_INIT_FAST);
   (void) pthread_mutex_init(&LOCK_user_conn, MY_MUTEX_INIT_FAST);
+  (void) pthread_mutex_init(&LOCK_rpl_status, MY_MUTEX_INIT_FAST);
   (void) pthread_cond_init(&COND_thread_count,NULL);
   (void) pthread_cond_init(&COND_refresh,NULL);
   (void) pthread_cond_init(&COND_thread_cache,NULL);
@@ -1706,6 +1708,7 @@ int main(int argc, char **argv)
   (void) pthread_cond_init(&COND_binlog_update, NULL);
   (void) pthread_cond_init(&COND_slave_stopped, NULL);
   (void) pthread_cond_init(&COND_slave_start, NULL);
+  (void) pthread_cond_init(&COND_rpl_status, NULL);
   init_signals();
 
   if (set_default_charset_by_name(default_charset, MYF(MY_WME)))
@@ -2652,6 +2655,7 @@ static struct option long_options[] = {
   {"gemini-recovery",	    required_argument, 0, (int) OPT_GEMINI_RECOVER},
   {"gemini-unbuffered-io",  no_argument,       0, (int) OPT_GEMINI_UNBUFFERED_IO},
 #endif
+  {"init-rpl-role", required_argument, 0, (int) OPT_INIT_RPL_ROLE},
   /* We must always support this option to make scripts like mysqltest easier
      to do */
   {"innodb_data_file_path", required_argument, 0,
@@ -3101,6 +3105,8 @@ struct show_var_st status_vars[]= {
   {"Open_streams",             (char*) &my_stream_opened,       SHOW_INT_CONST},
   {"Opened_tables",            (char*) &opened_tables,          SHOW_LONG},
   {"Questions",                (char*) 0,                       SHOW_QUESTION},
+  {"Rpl_status",               (char*) 0,
+   SHOW_RPL_STATUS},
   {"Select_full_join",         (char*) &select_full_join_count, SHOW_LONG},
   {"Select_full_range_join",   (char*) &select_full_range_join_count, SHOW_LONG},
   {"Select_range",             (char*) &select_range_count, 	SHOW_LONG},
@@ -3548,6 +3554,17 @@ static void get_options(int argc,char **argv)
       opt_log_slave_updates = 1;
       break;
 
+    case (int) OPT_INIT_RPL_ROLE:
+    {
+      int role;
+      if ((role=find_type(optarg, &rpl_role_typelib, 2)) <= 0)
+      {
+	fprintf(stderr, "Unknown replication role: %s\n", optarg);
+	exit(1);
+      }
+      rpl_status = (rpl_role == 1) ?  RPL_AUTH_MASTER : RPL_IDLE_SLAVE;
+      break;
+    }
     case (int)OPT_REPLICATE_IGNORE_DB:
       {
 	i_string *db = new i_string(optarg);

sql/repl_failsafe.cc

@@ -0,0 +1,36 @@
+/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB & Sasha
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
+
+// Sasha Pachev <sasha@mysql.com> is currently in charge of this file
+
+#include "mysql_priv.h"
+#include "repl_failsafe.h"
+
+RPL_STATUS rpl_status=RPL_NULL;
+pthread_mutex_t LOCK_rpl_status;
+pthread_cond_t COND_rpl_status;
+
+const char *rpl_role_type[] = {"","MASTER","SLAVE",NullS};
+TYPELIB rpl_role_typelib = {array_elements(rpl_role_type)-4,"",
+			    rpl_role_type+1};
+
+const char* rpl_status_type[] = {"AUTH_MASTER","ACTIVE_SLAVE","IDLE_SLAVE",
+				 "LOST_SOLDIER","TROOP_SOLDIER",
+				 "RECOVERY_CAPTAIN","NULL",NullS};
+TYPELIB rpl_status_typelib= {array_elements(rpl_status_type)-1,"",
+			     rpl_status_type};
+
+

sql/repl_failsafe.h

@@ -0,0 +1,13 @@
+#ifndef REPL_FAILSAFE_H
+#define REPL_FAILSAFE_H
+
+typedef enum {RPL_AUTH_MASTER=0,RPL_ACTIVE_SLAVE,RPL_IDLE_SLAVE,
+	      RPL_LOST_SOLDIER,RPL_TROOP_SOLDIER,
+	      RPL_RECOVERY_CAPTAIN,RPL_NULL} RPL_STATUS;
+extern RPL_STATUS rpl_status;
+
+extern pthread_mutex_t LOCK_rpl_status;
+extern pthread_cond_t COND_rpl_status;
+extern TYPELIB rpl_role_typelib, rpl_status_typelib;
+extern char* rpl_role_type[], *rpl_status_type;
+#endif

sql/sql_show.cc

@@ -1164,6 +1164,9 @@ int mysqld_show(THD *thd, const char *wild, show_var_st *variables)
       case SHOW_QUESTION:
         net_store_data(&packet2,(uint32) thd->query_id);
         break;
+      case SHOW_RPL_STATUS:
+	net_store_data(&packet2, rpl_status_type[(int)rpl_status]);
+	break;
       case SHOW_OPENTABLES:
         net_store_data(&packet2,(uint32) cached_tables());
         break;

sql/structs.h

@@ -140,6 +140,7 @@ enum SHOW_TYPE { SHOW_LONG,SHOW_CHAR,SHOW_INT,SHOW_CHAR_PTR,SHOW_BOOL,
 		 ,SHOW_SSL_CTX_SESS_TIMEOUTS, SHOW_SSL_CTX_SESS_CACHE_FULL
 		 ,SHOW_SSL_GET_CIPHER_LIST
 #endif /* HAVE_OPENSSL */
+		 ,SHOW_RPL_STATUS
 };
 
 enum SHOW_COMP_OPTION { SHOW_OPTION_YES, SHOW_OPTION_NO, SHOW_OPTION_DISABLED};