master register: create repmgr extension

dbutils.h

@@ -82,10 +82,21 @@ typedef struct s_event_info
   NULL \
 }
 
+
+/*
+ * Struct to store list of conninfo keywords and values
+ */
+typedef struct
+{
+	int    size;
+	char **keywords;
+	char **values;
+} t_conninfo_param_list;
+
+
 /*
  * Struct to store replication slot information
  */
-
 typedef struct s_replication_slot
 {
 	char slot_name[MAXLEN];
@@ -98,6 +109,22 @@ typedef struct s_replication_slot
 PGconn *establish_db_connection(const char *conninfo,
 								const bool exit_on_error);
 
+PGconn *establish_db_connection_as_user(const char *conninfo,
+										const char *user,
+										const bool exit_on_error);
+
+PGconn *establish_db_connection_by_params(const char *keywords[],
+										  const char *values[],
+										  const bool exit_on_error);
+
+
+/* conninfo manipulation functions */
+void initialize_conninfo_params(t_conninfo_param_list *param_list, bool set_defaults);
+void copy_conninfo_params(t_conninfo_param_list *dest_list, t_conninfo_param_list *source_list);
+void conn_to_param_list(PGconn *conn, t_conninfo_param_list *param_list);
+void param_set(t_conninfo_param_list *param_list, const char *param, const char *value);
+char *param_get(t_conninfo_param_list *param_list, const char *param);
+bool parse_conninfo_string(const char *conninfo_str, t_conninfo_param_list *param_list, char *errmsg, bool ignore_application_name);
 
 /* GUC manipulation functions */
 bool		set_config(PGconn *conn, const char *config_param,  const char *config_value);
@@ -105,6 +132,7 @@ bool		set_config_bool(PGconn *conn, const char *config_param, bool state);
 
 /* Server information functions */
 int			get_server_version(PGconn *conn, char *server_version);
+int			is_standby(PGconn *conn);
 
 #endif