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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
*
* $PostgreSQL: pgsql/src/bin/pg_controldata/pg_controldata.c,v 1.13 2004/02/11 22:55:25 tgl Exp $
*/
#include "postgres.h"
#include <unistd.h>
#include <time.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <locale.h>
#include <errno.h>
#include "catalog/pg_control.h"
#define _(x) gettext((x))
static void
usage(const char *progname)
{
printf(_("%s displays control information of a PostgreSQL database cluster.\n\n"), progname);
printf
(
_(
"Usage:\n"
" %s [OPTION]\n\n"
"Options:\n"
" DATADIR show cluster control information for DATADIR\n"
" --help show this help, then exit\n"
" --version output version information, then exit\n"
),
progname
);
printf(_("\nIf no data directory is specified, the environment variable PGDATA\nis used.\n\n"));
printf(_("Report bugs to <pgsql-bugs@postgresql.org>.\n"));
}
static const char *
dbState(DBState state)
{
switch (state)
{
case DB_STARTUP:
return _("starting up");
case DB_SHUTDOWNED:
return _("shut down");
case DB_SHUTDOWNING:
return _("shutting down");
case DB_IN_RECOVERY:
return _("in recovery");
case DB_IN_PRODUCTION:
return _("in production");
}
return _("unrecognized status code");
}
int
main(int argc, char *argv[])
{
ControlFileData ControlFile;
int fd;
char ControlFilePath[MAXPGPATH];
char *DataDir;
crc64 crc;
char pgctime_str[32];
char ckpttime_str[32];
char sysident_str[32];
char *strftime_fmt = "%c";
char *progname;
setlocale(LC_ALL, "");
#ifdef ENABLE_NLS
bindtextdomain("pg_controldata", LOCALEDIR);
textdomain("pg_controldata");
#endif
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);
}
}
if (argc > 1)
DataDir = argv[1];
else
DataDir = getenv("PGDATA");
if (DataDir == NULL)
{
fprintf(stderr, _("%s: no data directory specified\n"), progname);
fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
exit(1);
}
snprintf(ControlFilePath, MAXPGPATH, "%s/global/pg_control", DataDir);
if ((fd = open(ControlFilePath, O_RDONLY)) == -1)
{
fprintf(stderr, _("%s: could not open file \"%s\" for reading: %s\n"),
progname, ControlFilePath, strerror(errno));
exit(2);
}
if (read(fd, &ControlFile, sizeof(ControlFileData)) != sizeof(ControlFileData))
{
fprintf(stderr, _("%s: could not read file \"%s\": %s\n"),
progname, ControlFilePath, strerror(errno));
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"));
/*
* Use variable for format to suppress overly-anal-retentive gcc
* warning about %c
*/
strftime(pgctime_str, sizeof(pgctime_str), strftime_fmt,
localtime(&(ControlFile.time)));
strftime(ckpttime_str, sizeof(ckpttime_str), strftime_fmt,
localtime(&(ControlFile.checkPointCopy.time)));
/*
* Format system_identifier separately to keep platform-dependent format
* code out of the translatable message string.
*/
snprintf(sysident_str, sizeof(sysident_str), UINT64_FORMAT,
ControlFile.system_identifier);
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: %s\n"), sysident_str);
printf(_("Database cluster state: %s\n"), dbState(ControlFile.state));
printf(_("pg_control last modified: %s\n"), pgctime_str);
printf(_("Current log file ID: %u\n"), ControlFile.logId);
printf(_("Next log file segment: %u\n"), ControlFile.logSeg);
printf(_("Latest checkpoint location: %X/%X\n"),
ControlFile.checkPoint.xlogid, ControlFile.checkPoint.xrecoff);
printf(_("Prior checkpoint location: %X/%X\n"),
ControlFile.prevCheckPoint.xlogid, ControlFile.prevCheckPoint.xrecoff);
printf(_("Latest checkpoint's REDO location: %X/%X\n"),
ControlFile.checkPointCopy.redo.xlogid, ControlFile.checkPointCopy.redo.xrecoff);
printf(_("Latest checkpoint's UNDO location: %X/%X\n"),
ControlFile.checkPointCopy.undo.xlogid, ControlFile.checkPointCopy.undo.xrecoff);
printf(_("Latest checkpoint's StartUpID: %u\n"), ControlFile.checkPointCopy.ThisStartUpID);
printf(_("Latest checkpoint's NextXID: %u\n"), ControlFile.checkPointCopy.nextXid);
printf(_("Latest checkpoint's NextOID: %u\n"), ControlFile.checkPointCopy.nextOid);
printf(_("Time of latest checkpoint: %s\n"), ckpttime_str);
printf(_("Database block size: %u\n"), ControlFile.blcksz);
printf(_("Blocks per segment of large relation: %u\n"), ControlFile.relseg_size);
printf(_("Bytes per WAL segment: %u\n"), ControlFile.xlog_seg_size);
printf(_("Maximum length of identifiers: %u\n"), ControlFile.nameDataLen);
printf(_("Maximum number of function arguments: %u\n"), ControlFile.funcMaxArgs);
printf(_("Date/time type storage: %s\n"),
(ControlFile.enableIntTimes ? _("64-bit integers") : _("floating-point numbers")));
printf(_("Maximum length of locale name: %u\n"), ControlFile.localeBuflen);
printf(_("LC_COLLATE: %s\n"), ControlFile.lc_collate);
printf(_("LC_CTYPE: %s\n"), ControlFile.lc_ctype);
return 0;
}
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