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@ -1,87 +1,54 @@ |
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/* pg_controldata
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/*
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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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*/ |
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* $Header: /cvsroot/pgsql/contrib/pg_controldata/Attic/pg_controldata.c,v 1.2 2001/03/13 01:17:40 tgl Exp $ |
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*/ |
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#include "postgres.h" |
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#include <stdio.h> |
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#include <stdlib.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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typedef unsigned int uint32; |
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#include "config.h" |
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#include "access/xlogdefs.h" |
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/*
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* #include "access/xlog.h" |
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* #include "c.h" |
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*/ |
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/* The following definitions are extracted from access/xlog.h and its
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* recursive includes. There is too much initialisation needed if |
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* they are included direct. Perhaps someone more knowledgeable can |
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* fix that. |
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*/ |
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typedef struct crc64 |
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{ |
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uint32 crc1; |
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uint32 crc2; |
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} crc64; |
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#define LOCALE_NAME_BUFLEN 128 |
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typedef enum DBState |
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static const char * |
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dbState(DBState state) |
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{ |
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DB_STARTUP = 0, |
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DB_SHUTDOWNED, |
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DB_SHUTDOWNING, |
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DB_IN_RECOVERY, |
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DB_IN_PRODUCTION |
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} DBState; |
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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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typedef struct ControlFileData |
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int |
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main() |
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{ |
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crc64 crc; |
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uint32 logId; /* current log file id */ |
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uint32 logSeg; /* current log file segment (1-based) */ |
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struct
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XLogRecPtr checkPoint; /* last check point record ptr */ |
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time_t time; /* time stamp of last modification */ |
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DBState state; /* see enum above */ |
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/*
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* this data is used to make sure that configuration of this DB is |
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* compatible with the backend executable |
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*/ |
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uint32 blcksz; /* block size for this DB */ |
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uint32 relseg_size; /* blocks per segment of large relation */ |
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uint32 catalog_version_no; /* internal version number */ |
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/* active locales --- "C" if compiled without USE_LOCALE: */ |
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char lc_collate[LOCALE_NAME_BUFLEN]; |
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char lc_ctype[LOCALE_NAME_BUFLEN]; |
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/*
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* important directory locations |
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*/ |
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char archdir[MAXPGPATH]; /* where to move offline log files */ |
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} ControlFileData; |
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int main() { |
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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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char tmdt[32]; |
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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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DataDir = getenv("PGDATA"); |
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if ( DataDir == NULL ) { |
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@ -91,33 +58,77 @@ int main() { |
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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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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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read(fd, &ControlFile, sizeof(ControlFileData)); |
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strftime(tmdt, 32, "%c", localtime(&(ControlFile.time))); |
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printf("Log file id: %u\n" |
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"Log file segment: %u\n" |
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"Last modified: %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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"Catalog version number: %u\n" |
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"LC_COLLATE: %s\n" |
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"LC_CTYPE: %s\n" |
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"Log archive directory: %s\n", |
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ControlFile.logId, |
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ControlFile.logSeg, |
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tmdt, |
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ControlFile.blcksz, |
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ControlFile.relseg_size, |
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ControlFile.catalog_version_no, |
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ControlFile.lc_collate, |
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ControlFile.lc_ctype, |
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ControlFile.archdir); |
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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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Tom Lane
25 years ago