pg_controldata.c File Reference

#include "postgres.h"
#include <time.h>
#include "access/transam.h"
#include "access/xlog.h"
#include "access/xlog_internal.h"
#include "catalog/pg_control.h"
#include "common/controldata_utils.h"
#include "common/logging.h"
#include "getopt_long.h"
#include "pg_getopt.h"

Include dependency graph for pg_controldata.c:

Go to the source code of this file.

Macros
#define	FRONTEND   1

Functions
static void	usage (const char *progname)
static const char *	dbState (DBState state)
static const char *	wal_level_str (WalLevel wal_level)
int	main (int argc, char *argv[])

Macro Definition Documentation

FRONTEND

#define FRONTEND   1

Definition at line 17 of file pg_controldata.c.

Function Documentation

dbState()

static const char * dbState ( DBState  state )

static

Definition at line 50 of file pg_controldata.c.

{
    switch (state)
    {
        case DB_STARTUP:
            return _("starting up");
        case DB_SHUTDOWNED:
            return _("shut down");
        case DB_SHUTDOWNED_IN_RECOVERY:
            return _("shut down in recovery");
        case DB_SHUTDOWNING:
            return _("shutting down");
        case DB_IN_CRASH_RECOVERY:
            return _("in crash recovery");
        case DB_IN_ARCHIVE_RECOVERY:
            return _("in archive recovery");
        case DB_IN_PRODUCTION:
            return _("in production");
    }
    return _("unrecognized status code");
}

References _, DB_IN_ARCHIVE_RECOVERY, DB_IN_CRASH_RECOVERY, DB_IN_PRODUCTION, DB_SHUTDOWNED, DB_SHUTDOWNED_IN_RECOVERY, DB_SHUTDOWNING, and DB_STARTUP.

Referenced by main().

main()

int main	(	int	argc,
		char *	argv[]
	)

Definition at line 89 of file pg_controldata.c.

{
    static struct option long_options[] = {
        {"pgdata", required_argument, NULL, 'D'},
        {NULL, 0, NULL, 0}
    };
 
    ControlFileData *ControlFile;
    bool        crc_ok;
    char       *DataDir = NULL;
    time_t      time_tmp;
    struct tm  *tm_tmp;
    char        pgctime_str[128];
    char        ckpttime_str[128];
    char        mock_auth_nonce_str[MOCK_AUTH_NONCE_LEN * 2 + 1];
    const char *strftime_fmt = "%c";
    const char *progname;
    char        xlogfilename[MAXFNAMELEN];
    int         c;
    int         i;
    int         WalSegSz;
 
    pg_logging_init(argv[0]);
    set_pglocale_pgservice(argv[0], PG_TEXTDOMAIN("pg_controldata"));
    progname = get_progname(argv[0]);
 
    if (argc > 1)
    {
        if (strcmp(argv[1], "--help") == 0 || strcmp(argv[1], "-?") == 0)
        {
            usage(progname);
            exit(0);
        }
        if (strcmp(argv[1], "--version") == 0 || strcmp(argv[1], "-V") == 0)
        {
            puts("pg_controldata (PostgreSQL) " PG_VERSION);
            exit(0);
        }
    }
 
    while ((c = getopt_long(argc, argv, "D:", long_options, NULL)) != -1)
    {
        switch (c)
        {
            case 'D':
                DataDir = optarg;
                break;
 
            default:
                /* getopt_long already emitted a complaint */
                pg_log_error_hint("Try \"%s --help\" for more information.", progname);
                exit(1);
        }
    }
 
    if (DataDir == NULL)
    {
        if (optind < argc)
            DataDir = argv[optind++];
        else
            DataDir = getenv("PGDATA");
    }
 
    /* Complain if any arguments remain */
    if (optind < argc)
    {
        pg_log_error("too many command-line arguments (first is \"%s\")",
                     argv[optind]);
        pg_log_error_hint("Try \"%s --help\" for more information.", progname);
        exit(1);
    }
 
    if (DataDir == NULL)
    {
        pg_log_error("no data directory specified");
        pg_log_error_hint("Try \"%s --help\" for more information.", progname);
        exit(1);
    }
 
    /* get a copy of the control file */
    ControlFile = get_controlfile(DataDir, &crc_ok);
    if (ControlFile->pg_control_version != PG_CONTROL_VERSION)
    {
        pg_log_warning("control file version (%u) does not match the version understood by this program (%u)",
                       ControlFile->pg_control_version, PG_CONTROL_VERSION);
        pg_log_warning_detail("Either the control file has been created with a different version of PostgreSQL, "
                              "or it is corrupt.  The results below are untrustworthy.");
    }
    else if (!crc_ok)
    {
        pg_log_warning("calculated CRC checksum does not match value stored in control file");
        pg_log_warning_detail("Either the control file is corrupt, or it has a different layout than this program "
                              "is expecting.  The results below are untrustworthy.");
    }
 
    /* set wal segment size */
    WalSegSz = ControlFile->xlog_seg_size;
 
    if (!IsValidWalSegSize(WalSegSz))
    {
        pg_log_warning(ngettext("invalid WAL segment size in control file (%d byte)",
                                "invalid WAL segment size in control file (%d bytes)",
                                WalSegSz),
                       WalSegSz);
        pg_log_warning_detail("The WAL segment size must be a power of two between 1 MB and 1 GB.");
        pg_log_warning_detail("The file is corrupt and the results below are untrustworthy.");
    }
 
    /*
     * This slightly-chintzy coding will work as long as the control file
     * timestamps are within the range of time_t; that should be the case in
     * all foreseeable circumstances, so we don't bother importing the
     * backend's timezone library into pg_controldata.
     *
     * Use variable for format to suppress overly-anal-retentive gcc warning
     * about %c
     */
    time_tmp = (time_t) ControlFile->time;
    tm_tmp = localtime(&time_tmp);
 
    if (tm_tmp != NULL)
        strftime(pgctime_str, sizeof(pgctime_str), strftime_fmt, tm_tmp);
    else
        snprintf(pgctime_str, sizeof(pgctime_str), _("???"));
 
    time_tmp = (time_t) ControlFile->checkPointCopy.time;
    tm_tmp = localtime(&time_tmp);
 
    if (tm_tmp != NULL)
        strftime(ckpttime_str, sizeof(ckpttime_str), strftime_fmt, tm_tmp);
    else
        snprintf(ckpttime_str, sizeof(ckpttime_str), _("???"));
 
    /*
     * Calculate name of the WAL file containing the latest checkpoint's REDO
     * start point.
     *
     * A corrupted control file could report a WAL segment size of 0 or
     * negative value, and to guard against division by zero, we need to treat
     * that specially.
     */
    if (WalSegSz > 0)
    {
        XLogSegNo   segno;
 
        XLByteToSeg(ControlFile->checkPointCopy.redo, segno, WalSegSz);
        XLogFileName(xlogfilename, ControlFile->checkPointCopy.ThisTimeLineID,
                     segno, WalSegSz);
    }
    else
        strcpy(xlogfilename, _("???"));
 
    for (i = 0; i < MOCK_AUTH_NONCE_LEN; i++)
        snprintf(&mock_auth_nonce_str[i * 2], 3, "%02x",
                 (unsigned char) ControlFile->mock_authentication_nonce[i]);
 
    printf(_("pg_control version number:            %u\n"),
           ControlFile->pg_control_version);
    printf(_("Catalog version number:               %u\n"),
           ControlFile->catalog_version_no);
    printf(_("Database system identifier:           %" PRIu64 "\n"),
           ControlFile->system_identifier);
    printf(_("Database cluster state:               %s\n"),
           dbState(ControlFile->state));
    printf(_("pg_control last modified:             %s\n"),
           pgctime_str);
    printf(_("Latest checkpoint location:           %X/%08X\n"),
           LSN_FORMAT_ARGS(ControlFile->checkPoint));
    printf(_("Latest checkpoint's REDO location:    %X/%08X\n"),
           LSN_FORMAT_ARGS(ControlFile->checkPointCopy.redo));
    printf(_("Latest checkpoint's REDO WAL file:    %s\n"),
           xlogfilename);
    printf(_("Latest checkpoint's TimeLineID:       %u\n"),
           ControlFile->checkPointCopy.ThisTimeLineID);
    printf(_("Latest checkpoint's PrevTimeLineID:   %u\n"),
           ControlFile->checkPointCopy.PrevTimeLineID);
    printf(_("Latest checkpoint's full_page_writes: %s\n"),
           ControlFile->checkPointCopy.fullPageWrites ? _("on") : _("off"));
    printf(_("Latest checkpoint's NextXID:          %u:%u\n"),
           EpochFromFullTransactionId(ControlFile->checkPointCopy.nextXid),
           XidFromFullTransactionId(ControlFile->checkPointCopy.nextXid));
    printf(_("Latest checkpoint's NextOID:          %u\n"),
           ControlFile->checkPointCopy.nextOid);
    printf(_("Latest checkpoint's NextMultiXactId:  %u\n"),
           ControlFile->checkPointCopy.nextMulti);
    printf(_("Latest checkpoint's NextMultiOffset:  %u\n"),
           ControlFile->checkPointCopy.nextMultiOffset);
    printf(_("Latest checkpoint's oldestXID:        %u\n"),
           ControlFile->checkPointCopy.oldestXid);
    printf(_("Latest checkpoint's oldestXID's DB:   %u\n"),
           ControlFile->checkPointCopy.oldestXidDB);
    printf(_("Latest checkpoint's oldestActiveXID:  %u\n"),
           ControlFile->checkPointCopy.oldestActiveXid);
    printf(_("Latest checkpoint's oldestMultiXid:   %u\n"),
           ControlFile->checkPointCopy.oldestMulti);
    printf(_("Latest checkpoint's oldestMulti's DB: %u\n"),
           ControlFile->checkPointCopy.oldestMultiDB);
    printf(_("Latest checkpoint's oldestCommitTsXid:%u\n"),
           ControlFile->checkPointCopy.oldestCommitTsXid);
    printf(_("Latest checkpoint's newestCommitTsXid:%u\n"),
           ControlFile->checkPointCopy.newestCommitTsXid);
    printf(_("Time of latest checkpoint:            %s\n"),
           ckpttime_str);
    printf(_("Fake LSN counter for unlogged rels:   %X/%08X\n"),
           LSN_FORMAT_ARGS(ControlFile->unloggedLSN));
    printf(_("Minimum recovery ending location:     %X/%08X\n"),
           LSN_FORMAT_ARGS(ControlFile->minRecoveryPoint));
    printf(_("Min recovery ending loc's timeline:   %u\n"),
           ControlFile->minRecoveryPointTLI);
    printf(_("Backup start location:                %X/%08X\n"),
           LSN_FORMAT_ARGS(ControlFile->backupStartPoint));
    printf(_("Backup end location:                  %X/%08X\n"),
           LSN_FORMAT_ARGS(ControlFile->backupEndPoint));
    printf(_("End-of-backup record required:        %s\n"),
           ControlFile->backupEndRequired ? _("yes") : _("no"));
    printf(_("wal_level setting:                    %s\n"),
           wal_level_str(ControlFile->wal_level));
    printf(_("wal_log_hints setting:                %s\n"),
           ControlFile->wal_log_hints ? _("on") : _("off"));
    printf(_("max_connections setting:              %d\n"),
           ControlFile->MaxConnections);
    printf(_("max_worker_processes setting:         %d\n"),
           ControlFile->max_worker_processes);
    printf(_("max_wal_senders setting:              %d\n"),
           ControlFile->max_wal_senders);
    printf(_("max_prepared_xacts setting:           %d\n"),
           ControlFile->max_prepared_xacts);
    printf(_("max_locks_per_xact setting:           %d\n"),
           ControlFile->max_locks_per_xact);
    printf(_("track_commit_timestamp setting:       %s\n"),
           ControlFile->track_commit_timestamp ? _("on") : _("off"));
    printf(_("Maximum data alignment:               %u\n"),
           ControlFile->maxAlign);
    /* we don't print floatFormat since can't say much useful about it */
    printf(_("Database block size:                  %u\n"),
           ControlFile->blcksz);
    printf(_("Blocks per segment of large relation: %u\n"),
           ControlFile->relseg_size);
    printf(_("Pages per SLRU segment:               %u\n"),
           ControlFile->slru_pages_per_segment);
    printf(_("WAL block size:                       %u\n"),
           ControlFile->xlog_blcksz);
    printf(_("Bytes per WAL segment:                %u\n"),
           ControlFile->xlog_seg_size);
    printf(_("Maximum length of identifiers:        %u\n"),
           ControlFile->nameDataLen);
    printf(_("Maximum columns in an index:          %u\n"),
           ControlFile->indexMaxKeys);
    printf(_("Maximum size of a TOAST chunk:        %u\n"),
           ControlFile->toast_max_chunk_size);
    printf(_("Size of a large-object chunk:         %u\n"),
           ControlFile->loblksize);
    /* This is no longer configurable, but users may still expect to see it: */
    printf(_("Date/time type storage:               %s\n"),
           _("64-bit integers"));
    printf(_("Float8 argument passing:              %s\n"),
           (ControlFile->float8ByVal ? _("by value") : _("by reference")));
    printf(_("Data page checksum version:           %u\n"),
           ControlFile->data_checksum_version);
    printf(_("Default char data signedness:         %s\n"),
           (ControlFile->default_char_signedness ? _("signed") : _("unsigned")));
    printf(_("Mock authentication nonce:            %s\n"),
           mock_auth_nonce_str);
    return 0;
}

References _, ControlFileData::backupEndPoint, ControlFileData::backupEndRequired, ControlFileData::backupStartPoint, ControlFileData::blcksz, ControlFileData::catalog_version_no, ControlFileData::checkPoint, ControlFileData::checkPointCopy, ControlFile, ControlFileData::data_checksum_version, DataDir, dbState(), ControlFileData::default_char_signedness, EpochFromFullTransactionId, ControlFileData::float8ByVal, CheckPoint::fullPageWrites, get_controlfile(), get_progname(), getopt_long(), i, ControlFileData::indexMaxKeys, IsValidWalSegSize, ControlFileData::loblksize, LSN_FORMAT_ARGS, ControlFileData::max_locks_per_xact, ControlFileData::max_prepared_xacts, ControlFileData::max_wal_senders, ControlFileData::max_worker_processes, ControlFileData::maxAlign, ControlFileData::MaxConnections, MAXFNAMELEN, ControlFileData::minRecoveryPoint, ControlFileData::minRecoveryPointTLI, MOCK_AUTH_NONCE_LEN, ControlFileData::mock_authentication_nonce, ControlFileData::nameDataLen, CheckPoint::newestCommitTsXid, CheckPoint::nextMulti, CheckPoint::nextMultiOffset, CheckPoint::nextOid, CheckPoint::nextXid, ngettext, CheckPoint::oldestActiveXid, CheckPoint::oldestCommitTsXid, CheckPoint::oldestMulti, CheckPoint::oldestMultiDB, CheckPoint::oldestXid, CheckPoint::oldestXidDB, optarg, optind, PG_CONTROL_VERSION, ControlFileData::pg_control_version, pg_log_error, pg_log_error_hint, pg_log_warning, pg_log_warning_detail, pg_logging_init(), PG_TEXTDOMAIN, CheckPoint::PrevTimeLineID, printf, progname, CheckPoint::redo, ControlFileData::relseg_size, required_argument, set_pglocale_pgservice(), ControlFileData::slru_pages_per_segment, snprintf, ControlFileData::state, ControlFileData::system_identifier, CheckPoint::ThisTimeLineID, CheckPoint::time, ControlFileData::time, tm, ControlFileData::toast_max_chunk_size, ControlFileData::track_commit_timestamp, ControlFileData::unloggedLSN, usage(), ControlFileData::wal_level, wal_level_str(), ControlFileData::wal_log_hints, WalSegSz, XidFromFullTransactionId, XLByteToSeg, ControlFileData::xlog_blcksz, ControlFileData::xlog_seg_size, and XLogFileName().

usage()

static void usage ( const char *  progname )

static

Definition at line 33 of file pg_controldata.c.

{
    printf(_("%s displays control information of a PostgreSQL database cluster.\n\n"), progname);
    printf(_("Usage:\n"));
    printf(_("  %s [OPTION] [DATADIR]\n"), progname);
    printf(_("\nOptions:\n"));
    printf(_(" [-D, --pgdata=]DATADIR  data directory\n"));
    printf(_("  -V, --version          output version information, then exit\n"));
    printf(_("  -?, --help             show this help, then exit\n"));
    printf(_("\nIf no data directory (DATADIR) is specified, "
             "the environment variable PGDATA\nis used.\n\n"));
    printf(_("Report bugs to <%s>.\n"), PACKAGE_BUGREPORT);
    printf(_("%s home page: <%s>\n"), PACKAGE_NAME, PACKAGE_URL);
}

References _, printf, and progname.

Referenced by main().

wal_level_str()

static const char * wal_level_str ( WalLevel  wal_level )

static

Definition at line 73 of file pg_controldata.c.

{
    switch (wal_level)
    {
        case WAL_LEVEL_MINIMAL:
            return "minimal";
        case WAL_LEVEL_REPLICA:
            return "replica";
        case WAL_LEVEL_LOGICAL:
            return "logical";
    }
    return _("unrecognized \"wal_level\"");
}

References _, wal_level, WAL_LEVEL_LOGICAL, WAL_LEVEL_MINIMAL, and WAL_LEVEL_REPLICA.

Referenced by get_wal_level_string(), main(), and xlog_desc().