139 lines
3.7 KiB
C
139 lines
3.7 KiB
C
/*
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* pg_controldata
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*
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* reads the data from $PGDATA/global/pg_control
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*
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* copyright (c) Oliver Elphick <olly@lfix.co.uk>, 2001;
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* licence: BSD
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*
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* $Header: /cvsroot/pgsql/contrib/pg_controldata/Attic/pg_controldata.c,v 1.4 2001/09/06 10:49:29 petere Exp $
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*/
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#include "postgres.h"
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#include <unistd.h>
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#include <time.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include "catalog/pg_control.h"
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static const char *
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dbState(DBState state)
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{
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switch (state)
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{
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case DB_STARTUP:
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return "STARTUP";
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case DB_SHUTDOWNED:
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return "SHUTDOWNED";
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case DB_SHUTDOWNING:
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return "SHUTDOWNING";
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case DB_IN_RECOVERY:
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return "IN_RECOVERY";
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case DB_IN_PRODUCTION:
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return "IN_PRODUCTION";
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}
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return "unrecognized status code";
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}
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int
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main(int argc, char *argv[])
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{
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ControlFileData ControlFile;
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int fd;
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char ControlFilePath[MAXPGPATH];
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char *DataDir;
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crc64 crc;
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char pgctime_str[32];
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char ckpttime_str[32];
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if (argc > 1)
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DataDir = argv[1];
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else
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DataDir = getenv("PGDATA");
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if (DataDir == NULL)
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{
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fprintf(stderr, "no data directory specified\n");
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exit(1);
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}
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snprintf(ControlFilePath, MAXPGPATH, "%s/global/pg_control", DataDir);
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if ((fd = open(ControlFilePath, O_RDONLY)) == -1)
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{
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perror("Failed to open $PGDATA/global/pg_control for reading");
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exit(2);
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}
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if (read(fd, &ControlFile, sizeof(ControlFileData)) != sizeof(ControlFileData))
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{
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perror("Failed to read $PGDATA/global/pg_control");
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exit(2);
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}
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close(fd);
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/* Check the CRC. */
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INIT_CRC64(crc);
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COMP_CRC64(crc,
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(char *) &ControlFile + sizeof(crc64),
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sizeof(ControlFileData) - sizeof(crc64));
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FIN_CRC64(crc);
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if (!EQ_CRC64(crc, ControlFile.crc))
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printf("WARNING: Calculated CRC checksum does not match value stored in file.\n"
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"Either the file is corrupt, or it has a different layout than this program\n"
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"is expecting. The results below are untrustworthy.\n\n");
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strftime(pgctime_str, 32, "%c",
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localtime(&(ControlFile.time)));
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strftime(ckpttime_str, 32, "%c",
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localtime(&(ControlFile.checkPointCopy.time)));
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printf("pg_control version number: %u\n"
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"Catalog version number: %u\n"
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"Database state: %s\n"
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"pg_control last modified: %s\n"
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"Current log file id: %u\n"
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"Next log file segment: %u\n"
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"Latest checkpoint location: %X/%X\n"
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"Prior checkpoint location: %X/%X\n"
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"Latest checkpoint's REDO location: %X/%X\n"
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"Latest checkpoint's UNDO location: %X/%X\n"
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"Latest checkpoint's StartUpID: %u\n"
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"Latest checkpoint's NextXID: %u\n"
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"Latest checkpoint's NextOID: %u\n"
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"Time of latest checkpoint: %s\n"
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"Database block size: %u\n"
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"Blocks per segment of large relation: %u\n"
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"LC_COLLATE: %s\n"
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"LC_CTYPE: %s\n",
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ControlFile.pg_control_version,
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ControlFile.catalog_version_no,
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dbState(ControlFile.state),
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pgctime_str,
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ControlFile.logId,
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ControlFile.logSeg,
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ControlFile.checkPoint.xlogid,
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ControlFile.checkPoint.xrecoff,
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ControlFile.prevCheckPoint.xlogid,
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ControlFile.prevCheckPoint.xrecoff,
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ControlFile.checkPointCopy.redo.xlogid,
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ControlFile.checkPointCopy.redo.xrecoff,
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ControlFile.checkPointCopy.undo.xlogid,
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ControlFile.checkPointCopy.undo.xrecoff,
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ControlFile.checkPointCopy.ThisStartUpID,
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ControlFile.checkPointCopy.nextXid,
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ControlFile.checkPointCopy.nextOid,
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ckpttime_str,
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ControlFile.blcksz,
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ControlFile.relseg_size,
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ControlFile.lc_collate,
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ControlFile.lc_ctype);
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return (0);
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}
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