Initial database functions

dbutils.h

@@ -0,0 +1,110 @@
+/*
+ * dbutils.h
+ *
+ * Copyright (c) 2ndQuadrant, 2010-2017
+ */
+
+
+
+#ifndef _REPMGR_DBUTILS_H_
+#define _REPMGR_DBUTILS_H_
+
+#include "access/xlogdefs.h"
+#include "pqexpbuffer.h"
+
+#include "config.h"
+#include "strutil.h"
+
+
+typedef enum {
+	UNKNOWN = 0,
+	MASTER,
+	STANDBY,
+	WITNESS,
+	BDR
+} t_server_type;
+
+/*
+ * Struct to store node information
+ */
+typedef struct s_node_info
+{
+	int			  node_id;
+	int			  upstream_node_id;
+	t_server_type type;
+	char		  name[MAXLEN];
+	char		  conninfo[MAXLEN];
+	char		  slot_name[MAXLEN];
+	int			  priority;
+	bool		  active;
+	bool		  is_ready;
+	bool		  is_visible;
+	XLogRecPtr	  xlog_location;
+}	t_node_info;
+
+
+#define T_NODE_INFO_INITIALIZER { \
+  NODE_NOT_FOUND, \
+  NO_UPSTREAM_NODE, \
+  UNKNOWN, \
+  "", \
+  "", \
+  "", \
+  DEFAULT_PRIORITY, \
+  true, \
+  false, \
+  false, \
+  InvalidXLogRecPtr \
+}
+
+
+typedef struct NodeInfoListCell
+{
+	struct NodeInfoListCell *next;
+	t_node_info *node_info;
+} NodeInfoListCell;
+
+typedef struct NodeInfoList
+{
+	NodeInfoListCell *head;
+	NodeInfoListCell *tail;
+} NodeInfoList;
+
+
+typedef struct s_event_info
+{
+	char		  *node_name;
+	char		  *conninfo_str;
+}   t_event_info;
+
+#define T_EVENT_INFO_INITIALIZER { \
+  NULL, \
+  NULL \
+}
+
+/*
+ * Struct to store replication slot information
+ */
+
+typedef struct s_replication_slot
+{
+	char slot_name[MAXLEN];
+    char slot_type[MAXLEN];
+	bool active;
+}   t_replication_slot;
+
+
+/* connection functions */
+PGconn *establish_db_connection(const char *conninfo,
+								const bool exit_on_error);
+
+
+/* GUC manipulation functions */
+bool		set_config(PGconn *conn, const char *config_param,  const char *config_value);
+bool		set_config_bool(PGconn *conn, const char *config_param, bool state);
+
+/* Server information functions */
+int			get_server_version(PGconn *conn, char *server_version);
+
+#endif
+