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/*
* pg_controldata
*
* reads the data from $PGDATA/global/pg_control
*
* copyright (c) Oliver Elphick <olly@lfix.co.uk>, 2001;
* licence: BSD
*
* $Header: /cvsroot/pgsql/contrib/pg_controldata/Attic/pg_controldata.c,v 1.3 2001/03/22 03:59:09 momjian Exp $
*/
#include "postgres.h"
#include <unistd.h>
#include <time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include "catalog/pg_control.h"
static const char *
dbState(DBState state)
{
switch (state)
{
case DB_STARTUP:
return "STARTUP";
case DB_SHUTDOWNED:
return "SHUTDOWNED";
case DB_SHUTDOWNING:
return "SHUTDOWNING";
case DB_IN_RECOVERY:
return "IN_RECOVERY";
case DB_IN_PRODUCTION:
return "IN_PRODUCTION";
}
return "unrecognized status code";
}
int
main()
{
ControlFileData ControlFile;
int fd;
char ControlFilePath[MAXPGPATH];
char *DataDir;
crc64 crc;
char pgctime_str[32];
char ckpttime_str[32];
DataDir = getenv("PGDATA");
if (DataDir == NULL)
{
fprintf(stderr, "PGDATA is not defined\n");
exit(1);
}
snprintf(ControlFilePath, MAXPGPATH, "%s/global/pg_control", DataDir);
if ((fd = open(ControlFilePath, O_RDONLY)) == -1)
{
perror("Failed to open $PGDATA/global/pg_control for reading");
exit(2);
}
if (read(fd, &ControlFile, sizeof(ControlFileData)) != sizeof(ControlFileData))
{
perror("Failed to read $PGDATA/global/pg_control");
exit(2);
}
close(fd);
/* Check the CRC. */
INIT_CRC64(crc);
COMP_CRC64(crc,
(char *) &ControlFile + sizeof(crc64),
sizeof(ControlFileData) - sizeof(crc64));
FIN_CRC64(crc);
if (!EQ_CRC64(crc, ControlFile.crc))
printf("WARNING: Calculated CRC checksum does not match value stored in file.\n"
"Either the file is corrupt, or it has a different layout than this program\n"
"is expecting. The results below are untrustworthy.\n\n");
strftime(pgctime_str, 32, "%c",
localtime(&(ControlFile.time)));
strftime(ckpttime_str, 32, "%c",
localtime(&(ControlFile.checkPointCopy.time)));
printf("pg_control version number: %u\n"
"Catalog version number: %u\n"
"Database state: %s\n"
"pg_control last modified: %s\n"
"Current log file id: %u\n"
"Next log file segment: %u\n"
"Latest checkpoint location: %X/%X\n"
"Prior checkpoint location: %X/%X\n"
"Latest checkpoint's REDO location: %X/%X\n"
"Latest checkpoint's UNDO location: %X/%X\n"
"Latest checkpoint's StartUpID: %u\n"
"Latest checkpoint's NextXID: %u\n"
"Latest checkpoint's NextOID: %u\n"
"Time of latest checkpoint: %s\n"
"Database block size: %u\n"
"Blocks per segment of large relation: %u\n"
"LC_COLLATE: %s\n"
"LC_CTYPE: %s\n",
ControlFile.pg_control_version,
ControlFile.catalog_version_no,
dbState(ControlFile.state),
pgctime_str,
ControlFile.logId,
ControlFile.logSeg,
ControlFile.checkPoint.xlogid,
ControlFile.checkPoint.xrecoff,
ControlFile.prevCheckPoint.xlogid,
ControlFile.prevCheckPoint.xrecoff,
ControlFile.checkPointCopy.redo.xlogid,
ControlFile.checkPointCopy.redo.xrecoff,
ControlFile.checkPointCopy.undo.xlogid,
ControlFile.checkPointCopy.undo.xrecoff,
ControlFile.checkPointCopy.ThisStartUpID,
ControlFile.checkPointCopy.nextXid,
ControlFile.checkPointCopy.nextOid,
ckpttime_str,
ControlFile.blcksz,
ControlFile.relseg_size,
ControlFile.lc_collate,
ControlFile.lc_ctype);
return (0);
}
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