1 /*-------------------------------------------------------------------------
4 * A utility to "zero out" the xlog when it's corrupt beyond recovery.
5 * Can also rebuild pg_control if needed.
7 * The theory of operation is fairly simple:
8 * 1. Read the existing pg_control (which will include the last
9 * checkpoint record). If it is an old format then update to
11 * 2. If pg_control is corrupt, attempt to intuit reasonable values,
12 * by scanning the old xlog if necessary.
13 * 3. Modify pg_control to reflect a "shutdown" state with a checkpoint
14 * record at the start of xlog.
15 * 4. Flush the existing xlog files and write a new segment with
16 * just a checkpoint record in it. The new segment is positioned
17 * just past the end of the old xlog, so that existing LSNs in
18 * data pages will appear to be "in the past".
19 * This is all pretty straightforward except for the intuition part of
23 * Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group
24 * Portions Copyright (c) 1994, Regents of the University of California
26 * src/bin/pg_resetxlog/pg_resetxlog.c
28 *-------------------------------------------------------------------------
32 * We have to use postgres.h not postgres_fe.h here, because there's so much
33 * backend-only stuff in the XLOG include files we need. But we need a
34 * frontend-ish environment otherwise. Hence this ugly hack.
51 #include "access/transam.h"
52 #include "access/tuptoaster.h"
53 #include "access/multixact.h"
54 #include "access/xlog_internal.h"
55 #include "catalog/catversion.h"
56 #include "catalog/pg_control.h"
62 static ControlFileData ControlFile; /* pg_control values */
63 static XLogSegNo newXlogSegNo; /* new XLOG segment # */
64 static bool guessed = false; /* T if we had to guess at any values */
65 static const char *progname;
67 static bool ReadControlFile(void);
68 static void GuessControlValues(void);
69 static void PrintControlValues(bool guessed);
70 static void RewriteControlFile(void);
71 static void FindEndOfXLOG(void);
72 static void KillExistingXLOG(void);
73 static void KillExistingArchiveStatus(void);
74 static void WriteEmptyXLOG(void);
75 static void usage(void);
79 main(int argc, char *argv[])
83 bool noupdate = false;
84 uint32 set_xid_epoch = (uint32) -1;
85 TransactionId set_xid = 0;
87 MultiXactId set_mxid = 0;
88 MultiXactOffset set_mxoff = (MultiXactOffset) -1;
89 uint32 minXlogTli = 0;
90 XLogSegNo minXlogSegNo = 0;
96 set_pglocale_pgservice(argv[0], PG_TEXTDOMAIN("pg_resetxlog"));
98 progname = get_progname(argv[0]);
102 if (strcmp(argv[1], "--help") == 0 || strcmp(argv[1], "-?") == 0)
107 if (strcmp(argv[1], "--version") == 0 || strcmp(argv[1], "-V") == 0)
109 puts("pg_resetxlog (PostgreSQL) " PG_VERSION);
115 while ((c = getopt(argc, argv, "fl:m:no:O:x:e:")) != -1)
128 set_xid_epoch = strtoul(optarg, &endptr, 0);
129 if (endptr == optarg || *endptr != '\0')
131 fprintf(stderr, _("%s: invalid argument for option -e\n"), progname);
132 fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
135 if (set_xid_epoch == -1)
137 fprintf(stderr, _("%s: transaction ID epoch (-e) must not be -1\n"), progname);
143 set_xid = strtoul(optarg, &endptr, 0);
144 if (endptr == optarg || *endptr != '\0')
146 fprintf(stderr, _("%s: invalid argument for option -x\n"), progname);
147 fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
152 fprintf(stderr, _("%s: transaction ID (-x) must not be 0\n"), progname);
158 set_oid = strtoul(optarg, &endptr, 0);
159 if (endptr == optarg || *endptr != '\0')
161 fprintf(stderr, _("%s: invalid argument for option -o\n"), progname);
162 fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
167 fprintf(stderr, _("%s: OID (-o) must not be 0\n"), progname);
173 set_mxid = strtoul(optarg, &endptr, 0);
174 if (endptr == optarg || *endptr != '\0')
176 fprintf(stderr, _("%s: invalid argument for option -m\n"), progname);
177 fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
182 fprintf(stderr, _("%s: multitransaction ID (-m) must not be 0\n"), progname);
188 set_mxoff = strtoul(optarg, &endptr, 0);
189 if (endptr == optarg || *endptr != '\0')
191 fprintf(stderr, _("%s: invalid argument for option -O\n"), progname);
192 fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
197 fprintf(stderr, _("%s: multitransaction offset (-O) must not be -1\n"), progname);
203 if (strspn(optarg, "01234567890ABCDEFabcdef") != 24)
205 fprintf(stderr, _("%s: invalid argument for option -l\n"), progname);
206 fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
209 XLogFromFileName(optarg, &minXlogTli, &minXlogSegNo);
213 fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
220 fprintf(stderr, _("%s: no data directory specified\n"), progname);
221 fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
226 * Don't allow pg_resetxlog to be run as root, to avoid overwriting the
227 * ownership of files in the data directory. We need only check for root
228 * -- any other user won't have sufficient permissions to modify files in
229 * the data directory.
234 fprintf(stderr, _("%s: cannot be executed by \"root\"\n"),
236 fprintf(stderr, _("You must run %s as the PostgreSQL superuser.\n"),
242 DataDir = argv[optind];
244 if (chdir(DataDir) < 0)
246 fprintf(stderr, _("%s: could not change directory to \"%s\": %s\n"),
247 progname, DataDir, strerror(errno));
252 * Check for a postmaster lock file --- if there is one, refuse to
253 * proceed, on grounds we might be interfering with a live installation.
255 snprintf(path, MAXPGPATH, "%s/postmaster.pid", DataDir);
257 if ((fd = open(path, O_RDONLY, 0)) < 0)
261 fprintf(stderr, _("%s: could not open file \"%s\" for reading: %s\n"), progname, path, strerror(errno));
267 fprintf(stderr, _("%s: lock file \"%s\" exists\n"
268 "Is a server running? If not, delete the lock file and try again.\n"),
274 * Attempt to read the existing pg_control file
276 if (!ReadControlFile())
277 GuessControlValues();
280 * Also look at existing segment files to set up newXlogSegNo
285 * Adjust fields if required by switches. (Do this now so that printout,
286 * if any, includes these values.)
288 if (set_xid_epoch != -1)
289 ControlFile.checkPointCopy.nextXidEpoch = set_xid_epoch;
293 ControlFile.checkPointCopy.nextXid = set_xid;
296 * For the moment, just set oldestXid to a value that will force
297 * immediate autovacuum-for-wraparound. It's not clear whether adding
298 * user control of this is useful, so let's just do something that's
299 * reasonably safe. The magic constant here corresponds to the
300 * maximum allowed value of autovacuum_freeze_max_age.
302 ControlFile.checkPointCopy.oldestXid = set_xid - 2000000000;
303 if (ControlFile.checkPointCopy.oldestXid < FirstNormalTransactionId)
304 ControlFile.checkPointCopy.oldestXid += FirstNormalTransactionId;
305 ControlFile.checkPointCopy.oldestXidDB = InvalidOid;
309 ControlFile.checkPointCopy.nextOid = set_oid;
312 ControlFile.checkPointCopy.nextMulti = set_mxid;
315 ControlFile.checkPointCopy.nextMultiOffset = set_mxoff;
317 if (minXlogTli > ControlFile.checkPointCopy.ThisTimeLineID)
318 ControlFile.checkPointCopy.ThisTimeLineID = minXlogTli;
320 if (minXlogSegNo > newXlogSegNo)
321 newXlogSegNo = minXlogSegNo;
324 * If we had to guess anything, and -f was not given, just print the
325 * guessed values and exit. Also print if -n is given.
327 if ((guessed && !force) || noupdate)
329 PrintControlValues(guessed);
332 printf(_("\nIf these values seem acceptable, use -f to force reset.\n"));
340 * Don't reset from a dirty pg_control without -f, either.
342 if (ControlFile.state != DB_SHUTDOWNED && !force)
344 printf(_("The database server was not shut down cleanly.\n"
345 "Resetting the transaction log might cause data to be lost.\n"
346 "If you want to proceed anyway, use -f to force reset.\n"));
351 * Else, do the dirty deed.
353 RewriteControlFile();
355 KillExistingArchiveStatus();
358 printf(_("Transaction log reset\n"));
364 * Try to read the existing pg_control file.
366 * This routine is also responsible for updating old pg_control versions
367 * to the current format. (Currently we don't do anything of the sort.)
370 ReadControlFile(void)
377 if ((fd = open(XLOG_CONTROL_FILE, O_RDONLY | PG_BINARY, 0)) < 0)
380 * If pg_control is not there at all, or we can't read it, the odds
381 * are we've been handed a bad DataDir path, so give up. User can do
382 * "touch pg_control" to force us to proceed.
384 fprintf(stderr, _("%s: could not open file \"%s\" for reading: %s\n"),
385 progname, XLOG_CONTROL_FILE, strerror(errno));
387 fprintf(stderr, _("If you are sure the data directory path is correct, execute\n"
394 /* Use malloc to ensure we have a maxaligned buffer */
395 buffer = (char *) malloc(PG_CONTROL_SIZE);
397 len = read(fd, buffer, PG_CONTROL_SIZE);
400 fprintf(stderr, _("%s: could not read file \"%s\": %s\n"),
401 progname, XLOG_CONTROL_FILE, strerror(errno));
406 if (len >= sizeof(ControlFileData) &&
407 ((ControlFileData *) buffer)->pg_control_version == PG_CONTROL_VERSION)
413 offsetof(ControlFileData, crc));
416 if (EQ_CRC32(crc, ((ControlFileData *) buffer)->crc))
419 memcpy(&ControlFile, buffer, sizeof(ControlFile));
423 fprintf(stderr, _("%s: pg_control exists but has invalid CRC; proceed with caution\n"),
425 /* We will use the data anyway, but treat it as guessed. */
426 memcpy(&ControlFile, buffer, sizeof(ControlFile));
431 /* Looks like it's a mess. */
432 fprintf(stderr, _("%s: pg_control exists but is broken or unknown version; ignoring it\n"),
439 * Guess at pg_control values when we can't read the old ones.
442 GuessControlValues(void)
444 uint64 sysidentifier;
448 * Set up a completely default set of pg_control values.
451 memset(&ControlFile, 0, sizeof(ControlFile));
453 ControlFile.pg_control_version = PG_CONTROL_VERSION;
454 ControlFile.catalog_version_no = CATALOG_VERSION_NO;
457 * Create a new unique installation identifier, since we can no longer use
458 * any old XLOG records. See notes in xlog.c about the algorithm.
460 gettimeofday(&tv, NULL);
461 sysidentifier = ((uint64) tv.tv_sec) << 32;
462 sysidentifier |= (uint32) (tv.tv_sec | tv.tv_usec);
464 ControlFile.system_identifier = sysidentifier;
466 ControlFile.checkPointCopy.redo.xlogid = 0;
467 ControlFile.checkPointCopy.redo.xrecoff = SizeOfXLogLongPHD;
468 ControlFile.checkPointCopy.ThisTimeLineID = 1;
469 ControlFile.checkPointCopy.fullPageWrites = false;
470 ControlFile.checkPointCopy.nextXidEpoch = 0;
471 ControlFile.checkPointCopy.nextXid = FirstNormalTransactionId;
472 ControlFile.checkPointCopy.nextOid = FirstBootstrapObjectId;
473 ControlFile.checkPointCopy.nextMulti = FirstMultiXactId;
474 ControlFile.checkPointCopy.nextMultiOffset = 0;
475 ControlFile.checkPointCopy.oldestXid = FirstNormalTransactionId;
476 ControlFile.checkPointCopy.oldestXidDB = InvalidOid;
477 ControlFile.checkPointCopy.time = (pg_time_t) time(NULL);
478 ControlFile.checkPointCopy.oldestActiveXid = InvalidTransactionId;
480 ControlFile.state = DB_SHUTDOWNED;
481 ControlFile.time = (pg_time_t) time(NULL);
482 ControlFile.checkPoint = ControlFile.checkPointCopy.redo;
484 /* minRecoveryPoint, backupStartPoint and backupEndPoint can be left zero */
486 ControlFile.wal_level = WAL_LEVEL_MINIMAL;
487 ControlFile.MaxConnections = 100;
488 ControlFile.max_prepared_xacts = 0;
489 ControlFile.max_locks_per_xact = 64;
491 ControlFile.maxAlign = MAXIMUM_ALIGNOF;
492 ControlFile.floatFormat = FLOATFORMAT_VALUE;
493 ControlFile.blcksz = BLCKSZ;
494 ControlFile.relseg_size = RELSEG_SIZE;
495 ControlFile.xlog_blcksz = XLOG_BLCKSZ;
496 ControlFile.xlog_seg_size = XLOG_SEG_SIZE;
497 ControlFile.nameDataLen = NAMEDATALEN;
498 ControlFile.indexMaxKeys = INDEX_MAX_KEYS;
499 ControlFile.toast_max_chunk_size = TOAST_MAX_CHUNK_SIZE;
500 #ifdef HAVE_INT64_TIMESTAMP
501 ControlFile.enableIntTimes = true;
503 ControlFile.enableIntTimes = false;
505 ControlFile.float4ByVal = FLOAT4PASSBYVAL;
506 ControlFile.float8ByVal = FLOAT8PASSBYVAL;
509 * XXX eventually, should try to grovel through old XLOG to develop more
510 * accurate values for TimeLineID, nextXID, etc.
516 * Print the guessed pg_control values when we had to guess.
518 * NB: this display should be just those fields that will not be
519 * reset by RewriteControlFile().
522 PrintControlValues(bool guessed)
524 char sysident_str[32];
525 char fname[MAXFNAMELEN];
528 printf(_("Guessed pg_control values:\n\n"));
530 printf(_("pg_control values:\n\n"));
533 * Format system_identifier separately to keep platform-dependent format
534 * code out of the translatable message string.
536 snprintf(sysident_str, sizeof(sysident_str), UINT64_FORMAT,
537 ControlFile.system_identifier);
539 XLogFileName(fname, ControlFile.checkPointCopy.ThisTimeLineID, newXlogSegNo);
541 printf(_("First log segment after reset: %s\n"),
543 printf(_("pg_control version number: %u\n"),
544 ControlFile.pg_control_version);
545 printf(_("Catalog version number: %u\n"),
546 ControlFile.catalog_version_no);
547 printf(_("Database system identifier: %s\n"),
549 printf(_("Latest checkpoint's TimeLineID: %u\n"),
550 ControlFile.checkPointCopy.ThisTimeLineID);
551 printf(_("Latest checkpoint's full_page_writes: %s\n"),
552 ControlFile.checkPointCopy.fullPageWrites ? _("on") : _("off"));
553 printf(_("Latest checkpoint's NextXID: %u/%u\n"),
554 ControlFile.checkPointCopy.nextXidEpoch,
555 ControlFile.checkPointCopy.nextXid);
556 printf(_("Latest checkpoint's NextOID: %u\n"),
557 ControlFile.checkPointCopy.nextOid);
558 printf(_("Latest checkpoint's NextMultiXactId: %u\n"),
559 ControlFile.checkPointCopy.nextMulti);
560 printf(_("Latest checkpoint's NextMultiOffset: %u\n"),
561 ControlFile.checkPointCopy.nextMultiOffset);
562 printf(_("Latest checkpoint's oldestXID: %u\n"),
563 ControlFile.checkPointCopy.oldestXid);
564 printf(_("Latest checkpoint's oldestXID's DB: %u\n"),
565 ControlFile.checkPointCopy.oldestXidDB);
566 printf(_("Latest checkpoint's oldestActiveXID: %u\n"),
567 ControlFile.checkPointCopy.oldestActiveXid);
568 printf(_("Maximum data alignment: %u\n"),
569 ControlFile.maxAlign);
570 /* we don't print floatFormat since can't say much useful about it */
571 printf(_("Database block size: %u\n"),
573 printf(_("Blocks per segment of large relation: %u\n"),
574 ControlFile.relseg_size);
575 printf(_("WAL block size: %u\n"),
576 ControlFile.xlog_blcksz);
577 printf(_("Bytes per WAL segment: %u\n"),
578 ControlFile.xlog_seg_size);
579 printf(_("Maximum length of identifiers: %u\n"),
580 ControlFile.nameDataLen);
581 printf(_("Maximum columns in an index: %u\n"),
582 ControlFile.indexMaxKeys);
583 printf(_("Maximum size of a TOAST chunk: %u\n"),
584 ControlFile.toast_max_chunk_size);
585 printf(_("Date/time type storage: %s\n"),
586 (ControlFile.enableIntTimes ? _("64-bit integers") : _("floating-point numbers")));
587 printf(_("Float4 argument passing: %s\n"),
588 (ControlFile.float4ByVal ? _("by value") : _("by reference")));
589 printf(_("Float8 argument passing: %s\n"),
590 (ControlFile.float8ByVal ? _("by value") : _("by reference")));
595 * Write out the new pg_control file.
598 RewriteControlFile(void)
601 char buffer[PG_CONTROL_SIZE]; /* need not be aligned */
604 * Adjust fields as needed to force an empty XLOG starting at
607 XLogSegNoOffsetToRecPtr(newXlogSegNo, SizeOfXLogLongPHD,
608 ControlFile.checkPointCopy.redo);
609 ControlFile.checkPointCopy.time = (pg_time_t) time(NULL);
611 ControlFile.state = DB_SHUTDOWNED;
612 ControlFile.time = (pg_time_t) time(NULL);
613 ControlFile.checkPoint = ControlFile.checkPointCopy.redo;
614 ControlFile.prevCheckPoint.xlogid = 0;
615 ControlFile.prevCheckPoint.xrecoff = 0;
616 ControlFile.minRecoveryPoint.xlogid = 0;
617 ControlFile.minRecoveryPoint.xrecoff = 0;
618 ControlFile.backupStartPoint.xlogid = 0;
619 ControlFile.backupStartPoint.xrecoff = 0;
620 ControlFile.backupEndPoint.xlogid = 0;
621 ControlFile.backupEndPoint.xrecoff = 0;
622 ControlFile.backupEndRequired = false;
625 * Force the defaults for max_* settings. The values don't really matter
626 * as long as wal_level='minimal'; the postmaster will reset these fields
629 ControlFile.wal_level = WAL_LEVEL_MINIMAL;
630 ControlFile.MaxConnections = 100;
631 ControlFile.max_prepared_xacts = 0;
632 ControlFile.max_locks_per_xact = 64;
634 /* Now we can force the recorded xlog seg size to the right thing. */
635 ControlFile.xlog_seg_size = XLogSegSize;
637 /* Contents are protected with a CRC */
638 INIT_CRC32(ControlFile.crc);
639 COMP_CRC32(ControlFile.crc,
640 (char *) &ControlFile,
641 offsetof(ControlFileData, crc));
642 FIN_CRC32(ControlFile.crc);
645 * We write out PG_CONTROL_SIZE bytes into pg_control, zero-padding the
646 * excess over sizeof(ControlFileData). This reduces the odds of
647 * premature-EOF errors when reading pg_control. We'll still fail when we
648 * check the contents of the file, but hopefully with a more specific
649 * error than "couldn't read pg_control".
651 if (sizeof(ControlFileData) > PG_CONTROL_SIZE)
654 _("%s: internal error -- sizeof(ControlFileData) is too large ... fix PG_CONTROL_SIZE\n"),
659 memset(buffer, 0, PG_CONTROL_SIZE);
660 memcpy(buffer, &ControlFile, sizeof(ControlFileData));
662 unlink(XLOG_CONTROL_FILE);
664 fd = open(XLOG_CONTROL_FILE,
665 O_RDWR | O_CREAT | O_EXCL | PG_BINARY,
669 fprintf(stderr, _("%s: could not create pg_control file: %s\n"),
670 progname, strerror(errno));
675 if (write(fd, buffer, PG_CONTROL_SIZE) != PG_CONTROL_SIZE)
677 /* if write didn't set errno, assume problem is no disk space */
680 fprintf(stderr, _("%s: could not write pg_control file: %s\n"),
681 progname, strerror(errno));
687 fprintf(stderr, _("%s: fsync error: %s\n"), progname, strerror(errno));
696 * Scan existing XLOG files and determine the highest existing WAL address
698 * On entry, ControlFile.checkPointCopy.redo and ControlFile.xlog_seg_size
699 * are assumed valid (note that we allow the old xlog seg size to differ
700 * from what we're using). On exit, newXlogId and newXlogSeg are set to
701 * suitable values for the beginning of replacement WAL (in our seg size).
708 uint64 segs_per_xlogid;
712 * Initialize the max() computation using the last checkpoint address from
713 * old pg_control. Note that for the moment we are working with segment
714 * numbering according to the old xlog seg size.
716 segs_per_xlogid = (0x100000000L / ControlFile.xlog_seg_size);
717 newXlogSegNo = ((uint64) ControlFile.checkPointCopy.redo.xlogid) * segs_per_xlogid
718 + (ControlFile.checkPointCopy.redo.xrecoff / ControlFile.xlog_seg_size);
721 * Scan the pg_xlog directory to find existing WAL segment files. We
722 * assume any present have been used; in most scenarios this should be
723 * conservative, because of xlog.c's attempts to pre-create files.
725 xldir = opendir(XLOGDIR);
728 fprintf(stderr, _("%s: could not open directory \"%s\": %s\n"),
729 progname, XLOGDIR, strerror(errno));
734 while ((xlde = readdir(xldir)) != NULL)
736 if (strlen(xlde->d_name) == 24 &&
737 strspn(xlde->d_name, "0123456789ABCDEF") == 24)
744 sscanf(xlde->d_name, "%08X%08X%08X", &tli, &log, &seg);
745 segno = ((uint64) log) * segs_per_xlogid + seg;
748 * Note: we take the max of all files found, regardless of their
749 * timelines. Another possibility would be to ignore files of
750 * timelines other than the target TLI, but this seems safer.
751 * Better too large a result than too small...
753 if (segno > newXlogSegNo)
754 newXlogSegNo = segno;
761 * This fix is in mingw cvs (runtime/mingwex/dirent.c rev 1.4), but not in
764 if (GetLastError() == ERROR_NO_MORE_FILES)
770 fprintf(stderr, _("%s: could not read from directory \"%s\": %s\n"),
771 progname, XLOGDIR, strerror(errno));
777 * Finally, convert to new xlog seg size, and advance by one to ensure we
778 * are in virgin territory.
780 xlogbytepos = newXlogSegNo * ControlFile.xlog_seg_size;
781 newXlogSegNo = (xlogbytepos + XLogSegSize - 1) / XLogSegSize;
787 * Remove existing XLOG files
790 KillExistingXLOG(void)
794 char path[MAXPGPATH];
796 xldir = opendir(XLOGDIR);
799 fprintf(stderr, _("%s: could not open directory \"%s\": %s\n"),
800 progname, XLOGDIR, strerror(errno));
805 while ((xlde = readdir(xldir)) != NULL)
807 if (strlen(xlde->d_name) == 24 &&
808 strspn(xlde->d_name, "0123456789ABCDEF") == 24)
810 snprintf(path, MAXPGPATH, "%s/%s", XLOGDIR, xlde->d_name);
811 if (unlink(path) < 0)
813 fprintf(stderr, _("%s: could not delete file \"%s\": %s\n"),
814 progname, path, strerror(errno));
823 * This fix is in mingw cvs (runtime/mingwex/dirent.c rev 1.4), but not in
826 if (GetLastError() == ERROR_NO_MORE_FILES)
832 fprintf(stderr, _("%s: could not read from directory \"%s\": %s\n"),
833 progname, XLOGDIR, strerror(errno));
841 * Remove existing archive status files
844 KillExistingArchiveStatus(void)
848 char path[MAXPGPATH];
850 #define ARCHSTATDIR XLOGDIR "/archive_status"
852 xldir = opendir(ARCHSTATDIR);
855 fprintf(stderr, _("%s: could not open directory \"%s\": %s\n"),
856 progname, ARCHSTATDIR, strerror(errno));
861 while ((xlde = readdir(xldir)) != NULL)
863 if (strspn(xlde->d_name, "0123456789ABCDEF") == 24 &&
864 (strcmp(xlde->d_name + 24, ".ready") == 0 ||
865 strcmp(xlde->d_name + 24, ".done") == 0))
867 snprintf(path, MAXPGPATH, "%s/%s", ARCHSTATDIR, xlde->d_name);
868 if (unlink(path) < 0)
870 fprintf(stderr, _("%s: could not delete file \"%s\": %s\n"),
871 progname, path, strerror(errno));
880 * This fix is in mingw cvs (runtime/mingwex/dirent.c rev 1.4), but not in
883 if (GetLastError() == ERROR_NO_MORE_FILES)
889 fprintf(stderr, _("%s: could not read from directory \"%s\": %s\n"),
890 progname, ARCHSTATDIR, strerror(errno));
898 * Write an empty XLOG file, containing only the checkpoint record
899 * already set up in ControlFile.
906 XLogLongPageHeader longpage;
909 char path[MAXPGPATH];
913 /* Use malloc() to ensure buffer is MAXALIGNED */
914 buffer = (char *) malloc(XLOG_BLCKSZ);
915 page = (XLogPageHeader) buffer;
916 memset(buffer, 0, XLOG_BLCKSZ);
918 /* Set up the XLOG page header */
919 page->xlp_magic = XLOG_PAGE_MAGIC;
920 page->xlp_info = XLP_LONG_HEADER;
921 page->xlp_tli = ControlFile.checkPointCopy.ThisTimeLineID;
922 page->xlp_pageaddr.xlogid =
923 ControlFile.checkPointCopy.redo.xlogid;
924 page->xlp_pageaddr.xrecoff =
925 ControlFile.checkPointCopy.redo.xrecoff - SizeOfXLogLongPHD;
926 longpage = (XLogLongPageHeader) page;
927 longpage->xlp_sysid = ControlFile.system_identifier;
928 longpage->xlp_seg_size = XLogSegSize;
929 longpage->xlp_xlog_blcksz = XLOG_BLCKSZ;
931 /* Insert the initial checkpoint record */
932 record = (XLogRecord *) ((char *) page + SizeOfXLogLongPHD);
933 record->xl_prev.xlogid = 0;
934 record->xl_prev.xrecoff = 0;
935 record->xl_xid = InvalidTransactionId;
936 record->xl_tot_len = SizeOfXLogRecord + sizeof(CheckPoint);
937 record->xl_len = sizeof(CheckPoint);
938 record->xl_info = XLOG_CHECKPOINT_SHUTDOWN;
939 record->xl_rmid = RM_XLOG_ID;
940 memcpy(XLogRecGetData(record), &ControlFile.checkPointCopy,
944 COMP_CRC32(crc, &ControlFile.checkPointCopy, sizeof(CheckPoint));
945 COMP_CRC32(crc, (char *) record + sizeof(pg_crc32),
946 SizeOfXLogRecord - sizeof(pg_crc32));
948 record->xl_crc = crc;
950 /* Write the first page */
951 XLogFilePath(path, ControlFile.checkPointCopy.ThisTimeLineID, newXlogSegNo);
955 fd = open(path, O_RDWR | O_CREAT | O_EXCL | PG_BINARY,
959 fprintf(stderr, _("%s: could not open file \"%s\": %s\n"),
960 progname, path, strerror(errno));
965 if (write(fd, buffer, XLOG_BLCKSZ) != XLOG_BLCKSZ)
967 /* if write didn't set errno, assume problem is no disk space */
970 fprintf(stderr, _("%s: could not write file \"%s\": %s\n"),
971 progname, path, strerror(errno));
975 /* Fill the rest of the file with zeroes */
976 memset(buffer, 0, XLOG_BLCKSZ);
977 for (nbytes = XLOG_BLCKSZ; nbytes < XLogSegSize; nbytes += XLOG_BLCKSZ)
980 if (write(fd, buffer, XLOG_BLCKSZ) != XLOG_BLCKSZ)
984 fprintf(stderr, _("%s: could not write file \"%s\": %s\n"),
985 progname, path, strerror(errno));
992 fprintf(stderr, _("%s: fsync error: %s\n"), progname, strerror(errno));
1003 printf(_("%s resets the PostgreSQL transaction log.\n\n"), progname);
1004 printf(_("Usage:\n %s [OPTION]... DATADIR\n\n"), progname);
1005 printf(_("Options:\n"));
1006 printf(_(" -e XIDEPOCH set next transaction ID epoch\n"));
1007 printf(_(" -f force update to be done\n"));
1008 printf(_(" -l TLI,FILE,SEG force minimum WAL starting location for new transaction log\n"));
1009 printf(_(" -m XID set next multitransaction ID\n"));
1010 printf(_(" -n no update, just show extracted control values (for testing)\n"));
1011 printf(_(" -o OID set next OID\n"));
1012 printf(_(" -O OFFSET set next multitransaction offset\n"));
1013 printf(_(" -V, --version output version information, then exit\n"));
1014 printf(_(" -x XID set next transaction ID\n"));
1015 printf(_(" -?, --help show this help, then exit\n"));
1016 printf(_("\nReport bugs to <pgsql-bugs@postgresql.org>.\n"));