int
main(int argc, char *argv[])
{
int c;
bool force = false;
bool noupdate = false;
uint32 set_xid_epoch = (uint32) -1;
TransactionId set_xid = 0;
Oid set_oid = 0;
MultiXactId set_mxid = 0;
MultiXactOffset set_mxoff = (MultiXactOffset) -1;
uint32 minXlogTli = 0,
minXlogId = 0,
minXlogSeg = 0;
char *endptr;
char *endptr2;
char *endptr3;
char *DataDir;
int fd;
char path[MAXPGPATH];
set_pglocale_pgservice(argv[0], PG_TEXTDOMAIN("pg_resetxlog"));
progname = get_progname(argv[0]);
if (argc > 1)
{
if (strcmp(argv[1], "--help") == 0 || strcmp(argv[1], "-?") == 0)
{
usage();
exit(0);
}
if (strcmp(argv[1], "--version") == 0 || strcmp(argv[1], "-V") == 0)
{
puts("pg_resetxlog (Greenplum Database) " PG_VERSION);
exit(0);
}
if (strcmp(argv[1], "--gp-version") == 0)
{
puts("pg_resetxlog (Greenplum Database) " GP_VERSION);
exit(0);
}
}
while ((c = getopt(argc, argv, "fl:m:no:O:x:e:")) != -1)
{
switch (c)
{
case 'f':
force = true;
break;
case 'n':
noupdate = true;
break;
case 'e':
set_xid_epoch = strtoul(optarg, &endptr, 0);
if (endptr == optarg || *endptr != '\0')
{
fprintf(stderr, _("%s: invalid argument for option -e\n"), progname);
fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
exit(1);
}
if (set_xid_epoch == -1)
{
fprintf(stderr, _("%s: transaction ID epoch (-e) must not be -1\n"), progname);
exit(1);
}
break;
case 'x':
set_xid = strtoul(optarg, &endptr, 0);
if (endptr == optarg || *endptr != '\0')
{
fprintf(stderr, _("%s: invalid argument for option -x\n"), progname);
fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
exit(1);
}
if (set_xid == 0)
{
fprintf(stderr, _("%s: transaction ID (-x) must not be 0\n"), progname);
exit(1);
}
break;
case 'o':
set_oid = strtoul(optarg, &endptr, 0);
if (endptr == optarg || *endptr != '\0')
{
fprintf(stderr, _("%s: invalid argument for option -o\n"), progname);
fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
exit(1);
}
if (set_oid == 0)
{
fprintf(stderr, _("%s: OID (-o) must not be 0\n"), progname);
exit(1);
}
break;
case 'm':
set_mxid = strtoul(optarg, &endptr, 0);
if (endptr == optarg || *endptr != '\0')
{
fprintf(stderr, _("%s: invalid argument for option -m\n"), progname);
fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
exit(1);
}
if (set_mxid == 0)
{
fprintf(stderr, _("%s: multitransaction ID (-m) must not be 0\n"), progname);
exit(1);
}
break;
case 'O':
set_mxoff = strtoul(optarg, &endptr, 0);
if (endptr == optarg || *endptr != '\0')
{
fprintf(stderr, _("%s: invalid argument for option -O\n"), progname);
fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
exit(1);
}
if (set_mxoff == -1)
{
fprintf(stderr, _("%s: multitransaction offset (-O) must not be -1\n"), progname);
exit(1);
}
break;
case 'l':
minXlogTli = strtoul(optarg, &endptr, 0);
if (endptr == optarg || *endptr != ',')
{
fprintf(stderr, _("%s: invalid argument for option -l\n"), progname);
fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
exit(1);
}
minXlogId = strtoul(endptr + 1, &endptr2, 0);
if (endptr2 == endptr + 1 || *endptr2 != ',')
{
fprintf(stderr, _("%s: invalid argument for option -l\n"), progname);
fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
exit(1);
}
minXlogSeg = strtoul(endptr2 + 1, &endptr3, 0);
if (endptr3 == endptr2 + 1 || *endptr3 != '\0')
{
fprintf(stderr, _("%s: invalid argument for option -l\n"), progname);
fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
exit(1);
}
break;
default:
fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
exit(1);
}
}
if (optind == argc)
{
fprintf(stderr, _("%s: no data directory specified\n"), progname);
fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
exit(1);
}
/*
* Don't allow pg_resetxlog to be run as root, to avoid overwriting the
* ownership of files in the data directory. We need only check for root
* -- any other user won't have sufficient permissions to modify files in
* the data directory.
*/
#ifndef WIN32
if (geteuid() == 0)
{
fprintf(stderr, _("%s: cannot be executed by \"root\"\n"),
progname);
fprintf(stderr, _("You must run %s as the PostgreSQL superuser.\n"),
progname);
exit(1);
}
#endif
DataDir = argv[optind];
if (chdir(DataDir) < 0)
{
fprintf(stderr, _("%s: could not change directory to \"%s\": %s\n"),
progname, DataDir, strerror(errno));
exit(1);
}
/*
* Check for a postmaster lock file --- if there is one, refuse to
* proceed, on grounds we might be interfering with a live installation.
*/
snprintf(path, MAXPGPATH, "%s/postmaster.pid", DataDir);
if ((fd = open(path, O_RDONLY, 0)) < 0)
{
if (errno != ENOENT)
{
fprintf(stderr, _("%s: could not open file \"%s\" for reading: %s\n"), progname, path, strerror(errno));
exit(1);
}
}
else
{
fprintf(stderr, _("%s: lock file \"%s\" exists\n"
"Is a server running? If not, delete the lock file and try again.\n"),
progname, path);
exit(1);
}
/*
* Attempt to read the existing pg_control file
*/
if (!ReadControlFile())
GuessControlValues();
/*
* Adjust fields if required by switches. (Do this now so that printout,
* if any, includes these values.)
*/
if (set_xid_epoch != -1)
ControlFile.checkPointCopy.nextXidEpoch = set_xid_epoch;
if (set_xid != 0)
ControlFile.checkPointCopy.nextXid = set_xid;
if (set_oid != 0)
ControlFile.checkPointCopy.nextOid = set_oid;
if (set_mxid != 0)
ControlFile.checkPointCopy.nextMulti = set_mxid;
if (set_mxoff != -1)
ControlFile.checkPointCopy.nextMultiOffset = set_mxoff;
if (minXlogTli > ControlFile.checkPointCopy.ThisTimeLineID)
ControlFile.checkPointCopy.ThisTimeLineID = minXlogTli;
if (minXlogId > ControlFile.logId ||
(minXlogId == ControlFile.logId &&
minXlogSeg > ControlFile.logSeg))
{
ControlFile.logId = minXlogId;
ControlFile.logSeg = minXlogSeg;
}
/*
* If we had to guess anything, and -f was not given, just print the
* guessed values and exit. Also print if -n is given.
*/
if ((guessed && !force) || noupdate)
{
PrintControlValues(guessed);
if (!noupdate)
{
printf(_("\nIf these values seem acceptable, use -f to force reset.\n"));
exit(1);
}
else
exit(0);
}
/*
* Don't reset from a dirty pg_control without -f, either.
*/
if (ControlFile.state != DB_SHUTDOWNED && !force)
{
printf(_("The database server was not shut down cleanly.\n"
"Resetting the transaction log might cause data to be lost.\n"
"If you want to proceed anyway, use -f to force reset.\n"));
exit(1);
}
/*
* Else, do the dirty deed.
*/
RewriteControlFile();
KillExistingXLOG();
WriteEmptyXLOG();
printf(_("Transaction log reset\n"));
return 0;
}
int
main(int argc, char *argv[])
{
int c;
bool force = false;
bool noupdate = false;
MultiXactId set_oldestmxid = 0;
char *endptr;
char *endptr2;
char *DataDir = NULL;
int fd;
set_pglocale_pgservice(argv[0], PG_TEXTDOMAIN("pg_resetxlog"));
progname = get_progname(argv[0]);
if (argc > 1)
{
if (strcmp(argv[1], "--help") == 0 || strcmp(argv[1], "-?") == 0)
{
usage();
exit(0);
}
if (strcmp(argv[1], "--version") == 0 || strcmp(argv[1], "-V") == 0)
{
puts("pg_resetxlog (PostgreSQL) " PG_VERSION);
exit(0);
}
}
while ((c = getopt(argc, argv, "D:fl:m:no:O:x:e:")) != -1)
{
switch (c)
{
case 'D':
DataDir = optarg;
break;
case 'f':
force = true;
break;
case 'n':
noupdate = true;
break;
case 'e':
set_xid_epoch = strtoul(optarg, &endptr, 0);
if (endptr == optarg || *endptr != '\0')
{
fprintf(stderr, _("%s: invalid argument for option -e\n"), progname);
fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
exit(1);
}
if (set_xid_epoch == -1)
{
fprintf(stderr, _("%s: transaction ID epoch (-e) must not be -1\n"), progname);
exit(1);
}
break;
case 'x':
set_xid = strtoul(optarg, &endptr, 0);
if (endptr == optarg || *endptr != '\0')
{
fprintf(stderr, _("%s: invalid argument for option -x\n"), progname);
fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
exit(1);
}
if (set_xid == 0)
{
fprintf(stderr, _("%s: transaction ID (-x) must not be 0\n"), progname);
exit(1);
}
break;
case 'o':
set_oid = strtoul(optarg, &endptr, 0);
if (endptr == optarg || *endptr != '\0')
{
fprintf(stderr, _("%s: invalid argument for option -o\n"), progname);
fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
exit(1);
}
if (set_oid == 0)
{
fprintf(stderr, _("%s: OID (-o) must not be 0\n"), progname);
exit(1);
}
break;
case 'm':
set_mxid = strtoul(optarg, &endptr, 0);
if (endptr == optarg || *endptr != ',')
{
fprintf(stderr, _("%s: invalid argument for option -m\n"), progname);
fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
exit(1);
}
set_oldestmxid = strtoul(endptr + 1, &endptr2, 0);
if (endptr2 == endptr + 1 || *endptr2 != '\0')
{
fprintf(stderr, _("%s: invalid argument for option -m\n"), progname);
fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
exit(1);
}
if (set_mxid == 0)
{
fprintf(stderr, _("%s: multitransaction ID (-m) must not be 0\n"), progname);
exit(1);
}
/*
* XXX It'd be nice to have more sanity checks here, e.g. so
* that oldest is not wrapped around w.r.t. nextMulti.
*/
if (set_oldestmxid == 0)
{
fprintf(stderr, _("%s: oldest multitransaction ID (-m) must not be 0\n"),
progname);
exit(1);
}
break;
case 'O':
set_mxoff = strtoul(optarg, &endptr, 0);
if (endptr == optarg || *endptr != '\0')
{
fprintf(stderr, _("%s: invalid argument for option -O\n"), progname);
fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
exit(1);
}
if (set_mxoff == -1)
{
fprintf(stderr, _("%s: multitransaction offset (-O) must not be -1\n"), progname);
exit(1);
}
break;
case 'l':
if (strspn(optarg, "01234567890ABCDEFabcdef") != 24)
{
fprintf(stderr, _("%s: invalid argument for option -l\n"), progname);
fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
exit(1);
}
XLogFromFileName(optarg, &minXlogTli, &minXlogSegNo);
break;
default:
fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
exit(1);
}
}
if (DataDir == NULL && optind == argc)
{
fprintf(stderr, _("%s: no data directory specified\n"), progname);
fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
exit(1);
}
if (DataDir == NULL)
DataDir = argv[optind];
/*
* Don't allow pg_resetxlog to be run as root, to avoid overwriting the
* ownership of files in the data directory. We need only check for root
* -- any other user won't have sufficient permissions to modify files in
* the data directory.
*/
#ifndef WIN32
if (geteuid() == 0)
{
fprintf(stderr, _("%s: cannot be executed by \"root\"\n"),
progname);
fprintf(stderr, _("You must run %s as the PostgreSQL superuser.\n"),
progname);
exit(1);
}
#endif
if (chdir(DataDir) < 0)
{
fprintf(stderr, _("%s: could not change directory to \"%s\": %s\n"),
progname, DataDir, strerror(errno));
exit(1);
}
/*
* Check for a postmaster lock file --- if there is one, refuse to
* proceed, on grounds we might be interfering with a live installation.
*/
if ((fd = open("postmaster.pid", O_RDONLY, 0)) < 0)
{
if (errno != ENOENT)
{
fprintf(stderr, _("%s: could not open file \"%s\" for reading: %s\n"),
progname, "postmaster.pid", strerror(errno));
exit(1);
}
}
else
{
fprintf(stderr, _("%s: lock file \"%s\" exists\n"
"Is a server running? If not, delete the lock file and try again.\n"),
progname, "postmaster.pid");
exit(1);
}
/*
* Attempt to read the existing pg_control file
*/
if (!ReadControlFile())
GuessControlValues();
/*
* Also look at existing segment files to set up newXlogSegNo
*/
FindEndOfXLOG();
/*
* If we're not going to proceed with the reset, print the current control
* file parameters.
*/
if ((guessed && !force) || noupdate)
PrintControlValues(guessed);
/*
* Adjust fields if required by switches. (Do this now so that printout,
* if any, includes these values.)
*/
if (set_xid_epoch != -1)
ControlFile.checkPointCopy.nextXidEpoch = set_xid_epoch;
if (set_xid != 0)
{
ControlFile.checkPointCopy.nextXid = set_xid;
/*
* For the moment, just set oldestXid to a value that will force
* immediate autovacuum-for-wraparound. It's not clear whether adding
* user control of this is useful, so let's just do something that's
* reasonably safe. The magic constant here corresponds to the
* maximum allowed value of autovacuum_freeze_max_age.
*/
ControlFile.checkPointCopy.oldestXid = set_xid - 2000000000;
if (ControlFile.checkPointCopy.oldestXid < FirstNormalTransactionId)
ControlFile.checkPointCopy.oldestXid += FirstNormalTransactionId;
ControlFile.checkPointCopy.oldestXidDB = InvalidOid;
}
if (set_oid != 0)
ControlFile.checkPointCopy.nextOid = set_oid;
if (set_mxid != 0)
{
ControlFile.checkPointCopy.nextMulti = set_mxid;
ControlFile.checkPointCopy.oldestMulti = set_oldestmxid;
if (ControlFile.checkPointCopy.oldestMulti < FirstMultiXactId)
ControlFile.checkPointCopy.oldestMulti += FirstMultiXactId;
ControlFile.checkPointCopy.oldestMultiDB = InvalidOid;
}
if (set_mxoff != -1)
ControlFile.checkPointCopy.nextMultiOffset = set_mxoff;
if (minXlogTli > ControlFile.checkPointCopy.ThisTimeLineID)
{
ControlFile.checkPointCopy.ThisTimeLineID = minXlogTli;
ControlFile.checkPointCopy.PrevTimeLineID = minXlogTli;
}
if (minXlogSegNo > newXlogSegNo)
newXlogSegNo = minXlogSegNo;
/*
* If we had to guess anything, and -f was not given, just print the
* guessed values and exit. Also print if -n is given.
*/
if ((guessed && !force) || noupdate)
{
PrintNewControlValues();
if (!noupdate)
{
printf(_("\nIf these values seem acceptable, use -f to force reset.\n"));
exit(1);
}
else
exit(0);
}
/*
* Don't reset from a dirty pg_control without -f, either.
*/
if (ControlFile.state != DB_SHUTDOWNED && !force)
{
printf(_("The database server was not shut down cleanly.\n"
"Resetting the transaction log might cause data to be lost.\n"
"If you want to proceed anyway, use -f to force reset.\n"));
exit(1);
}
/*
* Else, do the dirty deed.
*/
RewriteControlFile();
KillExistingXLOG();
KillExistingArchiveStatus();
WriteEmptyXLOG();
printf(_("Transaction log reset\n"));
return 0;
}