Quelle  streamutil.h

/*-------------------------------------------------------------------------
 *
 * streamutil.h
 *
 * Portions Copyright (c) 1996-2025, PostgreSQL Global Development Group
 *
 * IDENTIFICATION
 *    src/bin/pg_basebackup/streamutil.h
 *-------------------------------------------------------------------------
 */

#ifndef STREAMUTIL_H
#define STREAMUTIL_H

#include "access/xlogdefs.h"
#include "datatype/timestamp.h"
#include "libpq-fe.h"
#include "pqexpbuffer.h"

extern const char *progname;
extern char *connection_string;
extern char *dbhost;
extern char *dbuser;
extern char *dbport;
extern char *dbname;
extern int dbgetpassword;
extern int WalSegSz;

/* Connection kept global so we can disconnect easily */
extern PGconn *conn;

extern PGconn *GetConnection(void);

/* Replication commands */
extern bool CreateReplicationSlot(PGconn *conn, const char *slot_name,
          const char *plugin, bool is_temporary,
          bool is_physical, bool reserve_wal,
          bool slot_exists_ok, bool two_phase,
          bool failover);
extern bool DropReplicationSlot(PGconn *conn, const char *slot_name);
extern bool RunIdentifySystem(PGconn *conn, char **sysid,
         TimeLineID *starttli,
         XLogRecPtr *startpos,
         char **db_name);

extern void AppendPlainCommandOption(PQExpBuffer buf,
          bool use_new_option_syntax,
          char *option_name);
extern void AppendStringCommandOption(PQExpBuffer buf,
           bool use_new_option_syntax,
           char *option_name, char *option_value);
extern void AppendIntegerCommandOption(PQExpBuffer buf,
            bool use_new_option_syntax,
            char *option_name, int32 option_value);

extern bool GetSlotInformation(PGconn *conn, const char *slot_name,
          XLogRecPtr *restart_lsn,
          TimeLineID *restart_tli);
extern bool RetrieveWalSegSize(PGconn *conn);
extern TimestampTz feGetCurrentTimestamp(void);
extern void feTimestampDifference(TimestampTz start_time, TimestampTz stop_time,
          long *secs, int *microsecs);

extern bool feTimestampDifferenceExceeds(TimestampTz start_time, TimestampTz stop_time,
           int msec);
extern void fe_sendint64(int64 i, char *buf);
extern int64 fe_recvint64(char *buf);

#endif       /* STREAMUTIL_H */