/*
* Start the log streaming
*/
static void
StreamLog(void)
{
PGresult *res;
uint32 timeline;
XLogRecPtr startpos;
int minServerMajor,
maxServerMajor;
int serverMajor;
/*
* Connect in replication mode to the server
*/
conn = GetConnection();
if (!conn)
/* Error message already written in GetConnection() */
return;
/*
* Check server version. IDENTIFY_SYSTEM didn't return the current xlog
* position before 9.1, so we can't work with servers older than 9.1. And
* we don't support servers newer than the client.
*/
minServerMajor = 901;
maxServerMajor = PG_VERSION_NUM / 100;
serverMajor = PQserverVersion(conn) / 100;
if (serverMajor < minServerMajor || serverMajor > maxServerMajor)
{
fprintf(stderr, _("%s: unsupported server version %s\n"),
progname, PQparameterStatus(conn, "server_version"));
disconnect_and_exit(1);
}
/*
* Run IDENTIFY_SYSTEM so we can get the timeline and current xlog
* position.
*/
res = PQexec(conn, "IDENTIFY_SYSTEM");
if (PQresultStatus(res) != PGRES_TUPLES_OK)
{
fprintf(stderr, _("%s: could not send replication command \"%s\": %s"),
progname, "IDENTIFY_SYSTEM", PQerrorMessage(conn));
disconnect_and_exit(1);
}
if (PQntuples(res) != 1 || PQnfields(res) != 3)
{
fprintf(stderr,
_("%s: could not identify system: got %d rows and %d fields, expected %d rows and %d fields\n"),
progname, PQntuples(res), PQnfields(res), 1, 3);
disconnect_and_exit(1);
}
timeline = atoi(PQgetvalue(res, 0, 1));
if (sscanf(PQgetvalue(res, 0, 2), "%X/%X", &startpos.xlogid, &startpos.xrecoff) != 2)
{
fprintf(stderr,
_("%s: could not parse transaction log location \"%s\"\n"),
progname, PQgetvalue(res, 0, 2));
disconnect_and_exit(1);
}
PQclear(res);
/*
* Figure out where to start streaming.
*/
startpos = FindStreamingStart(startpos, timeline);
/*
* Always start streaming at the beginning of a segment
*/
startpos.xrecoff -= startpos.xrecoff % XLOG_SEG_SIZE;
/*
* Start the replication
*/
if (verbose)
fprintf(stderr,
_("%s: starting log streaming at %X/%X (timeline %u)\n"),
progname, startpos.xlogid, startpos.xrecoff, timeline);
ReceiveXlogStream(conn, startpos, timeline, NULL, basedir,
stop_streaming, standby_message_timeout, false);
PQfinish(conn);
}
/*
* Start the log streaming
*/
static void
StreamLog(void)
{
PGresult *res;
uint32 timeline;
XLogRecPtr startpos;
/*
* Connect in replication mode to the server
*/
conn = GetConnection();
if (!conn)
/* Error message already written in GetConnection() */
return;
/*
* Run IDENTIFY_SYSTEM so we can get the timeline and current xlog
* position.
*/
res = PQexec(conn, "IDENTIFY_SYSTEM");
if (PQresultStatus(res) != PGRES_TUPLES_OK)
{
fprintf(stderr, _("%s: could not identify system: %s\n"),
progname, PQerrorMessage(conn));
disconnect_and_exit(1);
}
if (PQntuples(res) != 1 || PQnfields(res) != 3)
{
fprintf(stderr, _("%s: could not identify system, got %d rows and %d fields\n"),
progname, PQntuples(res), PQnfields(res));
disconnect_and_exit(1);
}
timeline = atoi(PQgetvalue(res, 0, 1));
if (sscanf(PQgetvalue(res, 0, 2), "%X/%X", &startpos.xlogid, &startpos.xrecoff) != 2)
{
fprintf(stderr, _("%s: could not parse log start position from value \"%s\"\n"),
progname, PQgetvalue(res, 0, 2));
disconnect_and_exit(1);
}
PQclear(res);
/*
* Figure out where to start streaming.
*/
startpos = FindStreamingStart(startpos, timeline);
/*
* Always start streaming at the beginning of a segment
*/
startpos.xrecoff -= startpos.xrecoff % XLOG_SEG_SIZE;
/*
* Start the replication
*/
if (verbose)
fprintf(stderr, _("%s: starting log streaming at %X/%X (timeline %u)\n"),
progname, startpos.xlogid, startpos.xrecoff, timeline);
ReceiveXlogStream(conn, startpos, timeline, NULL, basedir,
stop_streaming,
standby_message_timeout, false);
PQfinish(conn);
}
