Consolidate generation of various server control commands

This is needed for better switchover control, so we can instruct
the remote repmgr to issue the appropriate server command rather
than trying to work out what it should be from the local node.

repmgr-client-global.h

@@ -50,12 +50,12 @@ typedef struct
 	char		remote_user[MAXLEN];
 	char		superuser[MAXLEN];
 
-	/* node options */
+	/* general node options */
 	int			node_id;
 	char		node_name[MAXLEN];
 	char		data_dir[MAXPGPATH];
 
-	/* standby clone options */
+	/* "standby clone" options */
 	bool		copy_external_config_files;
 	int			copy_external_config_files_destination;
 	bool		fast_checkpoint;
@@ -69,11 +69,16 @@ typedef struct
 	char		wal_keep_segments[MAXLEN];
 	bool		without_barman;
 
-	/* standby register options */
+	/* "standby register" options */
 	bool		wait_register_sync;
 	int			wait_register_sync_seconds;
 
-	/* event options */
+	/* "node service" options */
+	char		action[MAXLEN];
+	bool		check;
+	bool		list;
+
+	/* "cluster event" options */
 	bool		all;
 	char		event[MAXLEN];
 	int			limit;
@@ -97,11 +102,13 @@ typedef struct
 		"",	"",				  \
 		/* node options */ \
 		UNKNOWN_NODE_ID, "", "", \
-		/* standby clone options */ \
+		/* "standby clone" options */ \
 		false, CONFIG_FILE_SAMEPATH, false, false, false, "", "", "", NO_UPSTREAM_NODE, false, "", false, \
-		/* standby register options */ \
+		/* "standby register" options */ \
 		false, 0, \
-		/* event options */ \
+		/* "node service" options */ \
+		"", false, false, \
+		/* "cluster event" options */ \
 		false, "", CLUSTER_EVENT_LIMIT,	\
 		"/tmp" \
 }
@@ -112,6 +119,17 @@ typedef enum {
 	pg_basebackup
 }	standy_clone_mode;
 
+typedef enum {
+	ACTION_UNKNOWN = -1,
+	ACTION_NONE,
+	ACTION_START,
+	ACTION_STOP,
+	ACTION_RESTART,
+	ACTION_RELOAD,
+	ACTION_PROMOTE
+} t_server_action;
+
+
 
 /* global configuration structures */
 extern t_runtime_options runtime_options;
@@ -149,4 +167,8 @@ extern void get_superuser_connection(PGconn **conn, PGconn **superuser_conn, PGc
 
 extern bool remote_command(const char *host, const char *user, const char *command, PQExpBufferData *outputbuf);
 
+/* server control functions */
+extern void get_server_action(t_server_action action, char *script, char *data_dir);
+
+
 #endif