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xlogarchive.c
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1 /*-------------------------------------------------------------------------
2  *
3  * xlogarchive.c
4  * Functions for archiving WAL files and restoring from the archive.
5  *
6  *
7  * Portions Copyright (c) 1996-2017, PostgreSQL Global Development Group
8  * Portions Copyright (c) 1994, Regents of the University of California
9  *
10  * src/backend/access/transam/xlogarchive.c
11  *
12  *-------------------------------------------------------------------------
13  */
14 
15 #include "postgres.h"
16 
17 #include <sys/stat.h>
18 #include <sys/wait.h>
19 #include <signal.h>
20 #include <unistd.h>
21 
22 #include "access/xlog.h"
23 #include "access/xlog_internal.h"
24 #include "miscadmin.h"
25 #include "postmaster/startup.h"
26 #include "replication/walsender.h"
27 #include "storage/fd.h"
28 #include "storage/ipc.h"
29 #include "storage/lwlock.h"
30 #include "storage/pmsignal.h"
31 
32 /*
33  * Attempt to retrieve the specified file from off-line archival storage.
34  * If successful, fill "path" with its complete path (note that this will be
35  * a temp file name that doesn't follow the normal naming convention), and
36  * return TRUE.
37  *
38  * If not successful, fill "path" with the name of the normal on-line file
39  * (which may or may not actually exist, but we'll try to use it), and return
40  * FALSE.
41  *
42  * For fixed-size files, the caller may pass the expected size as an
43  * additional crosscheck on successful recovery. If the file size is not
44  * known, set expectedSize = 0.
45  *
46  * When 'cleanupEnabled' is false, refrain from deleting any old WAL segments
47  * in the archive. This is used when fetching the initial checkpoint record,
48  * when we are not yet sure how far back we need the WAL.
49  */
50 bool
51 RestoreArchivedFile(char *path, const char *xlogfname,
52  const char *recovername, off_t expectedSize,
53  bool cleanupEnabled)
54 {
55  char xlogpath[MAXPGPATH];
56  char xlogRestoreCmd[MAXPGPATH];
57  char lastRestartPointFname[MAXPGPATH];
58  char *dp;
59  char *endp;
60  const char *sp;
61  int rc;
62  bool signaled;
63  struct stat stat_buf;
64  XLogSegNo restartSegNo;
65  XLogRecPtr restartRedoPtr;
66  TimeLineID restartTli;
67 
68  /* In standby mode, restore_command might not be supplied */
70  goto not_available;
71 
72  /*
73  * When doing archive recovery, we always prefer an archived log file even
74  * if a file of the same name exists in XLOGDIR. The reason is that the
75  * file in XLOGDIR could be an old, un-filled or partly-filled version
76  * that was copied and restored as part of backing up $PGDATA.
77  *
78  * We could try to optimize this slightly by checking the local copy
79  * lastchange timestamp against the archived copy, but we have no API to
80  * do this, nor can we guarantee that the lastchange timestamp was
81  * preserved correctly when we copied to archive. Our aim is robustness,
82  * so we elect not to do this.
83  *
84  * If we cannot obtain the log file from the archive, however, we will try
85  * to use the XLOGDIR file if it exists. This is so that we can make use
86  * of log segments that weren't yet transferred to the archive.
87  *
88  * Notice that we don't actually overwrite any files when we copy back
89  * from archive because the restore_command may inadvertently restore
90  * inappropriate xlogs, or they may be corrupt, so we may wish to fallback
91  * to the segments remaining in current XLOGDIR later. The
92  * copy-from-archive filename is always the same, ensuring that we don't
93  * run out of disk space on long recoveries.
94  */
95  snprintf(xlogpath, MAXPGPATH, XLOGDIR "/%s", recovername);
96 
97  /*
98  * Make sure there is no existing file named recovername.
99  */
100  if (stat(xlogpath, &stat_buf) != 0)
101  {
102  if (errno != ENOENT)
103  ereport(FATAL,
105  errmsg("could not stat file \"%s\": %m",
106  xlogpath)));
107  }
108  else
109  {
110  if (unlink(xlogpath) != 0)
111  ereport(FATAL,
113  errmsg("could not remove file \"%s\": %m",
114  xlogpath)));
115  }
116 
117  /*
118  * Calculate the archive file cutoff point for use during log shipping
119  * replication. All files earlier than this point can be deleted from the
120  * archive, though there is no requirement to do so.
121  *
122  * If cleanup is not enabled, initialise this with the filename of
123  * InvalidXLogRecPtr, which will prevent the deletion of any WAL files
124  * from the archive because of the alphabetic sorting property of WAL
125  * filenames.
126  *
127  * Once we have successfully located the redo pointer of the checkpoint
128  * from which we start recovery we never request a file prior to the redo
129  * pointer of the last restartpoint. When redo begins we know that we have
130  * successfully located it, so there is no need for additional status
131  * flags to signify the point when we can begin deleting WAL files from
132  * the archive.
133  */
134  if (cleanupEnabled)
135  {
136  GetOldestRestartPoint(&restartRedoPtr, &restartTli);
137  XLByteToSeg(restartRedoPtr, restartSegNo);
138  XLogFileName(lastRestartPointFname, restartTli, restartSegNo);
139  /* we shouldn't need anything earlier than last restart point */
140  Assert(strcmp(lastRestartPointFname, xlogfname) <= 0);
141  }
142  else
143  XLogFileName(lastRestartPointFname, 0, 0L);
144 
145  /*
146  * construct the command to be executed
147  */
148  dp = xlogRestoreCmd;
149  endp = xlogRestoreCmd + MAXPGPATH - 1;
150  *endp = '\0';
151 
152  for (sp = recoveryRestoreCommand; *sp; sp++)
153  {
154  if (*sp == '%')
155  {
156  switch (sp[1])
157  {
158  case 'p':
159  /* %p: relative path of target file */
160  sp++;
161  StrNCpy(dp, xlogpath, endp - dp);
162  make_native_path(dp);
163  dp += strlen(dp);
164  break;
165  case 'f':
166  /* %f: filename of desired file */
167  sp++;
168  StrNCpy(dp, xlogfname, endp - dp);
169  dp += strlen(dp);
170  break;
171  case 'r':
172  /* %r: filename of last restartpoint */
173  sp++;
174  StrNCpy(dp, lastRestartPointFname, endp - dp);
175  dp += strlen(dp);
176  break;
177  case '%':
178  /* convert %% to a single % */
179  sp++;
180  if (dp < endp)
181  *dp++ = *sp;
182  break;
183  default:
184  /* otherwise treat the % as not special */
185  if (dp < endp)
186  *dp++ = *sp;
187  break;
188  }
189  }
190  else
191  {
192  if (dp < endp)
193  *dp++ = *sp;
194  }
195  }
196  *dp = '\0';
197 
198  ereport(DEBUG3,
199  (errmsg_internal("executing restore command \"%s\"",
200  xlogRestoreCmd)));
201 
202  /*
203  * Check signals before restore command and reset afterwards.
204  */
206 
207  /*
208  * Copy xlog from archival storage to XLOGDIR
209  */
210  rc = system(xlogRestoreCmd);
211 
213 
214  if (rc == 0)
215  {
216  /*
217  * command apparently succeeded, but let's make sure the file is
218  * really there now and has the correct size.
219  */
220  if (stat(xlogpath, &stat_buf) == 0)
221  {
222  if (expectedSize > 0 && stat_buf.st_size != expectedSize)
223  {
224  int elevel;
225 
226  /*
227  * If we find a partial file in standby mode, we assume it's
228  * because it's just being copied to the archive, and keep
229  * trying.
230  *
231  * Otherwise treat a wrong-sized file as FATAL to ensure the
232  * DBA would notice it, but is that too strong? We could try
233  * to plow ahead with a local copy of the file ... but the
234  * problem is that there probably isn't one, and we'd
235  * incorrectly conclude we've reached the end of WAL and we're
236  * done recovering ...
237  */
238  if (StandbyMode && stat_buf.st_size < expectedSize)
239  elevel = DEBUG1;
240  else
241  elevel = FATAL;
242  ereport(elevel,
243  (errmsg("archive file \"%s\" has wrong size: %lu instead of %lu",
244  xlogfname,
245  (unsigned long) stat_buf.st_size,
246  (unsigned long) expectedSize)));
247  return false;
248  }
249  else
250  {
251  ereport(LOG,
252  (errmsg("restored log file \"%s\" from archive",
253  xlogfname)));
254  strcpy(path, xlogpath);
255  return true;
256  }
257  }
258  else
259  {
260  /* stat failed */
261  if (errno != ENOENT)
262  ereport(FATAL,
264  errmsg("could not stat file \"%s\": %m",
265  xlogpath)));
266  }
267  }
268 
269  /*
270  * Remember, we rollforward UNTIL the restore fails so failure here is
271  * just part of the process... that makes it difficult to determine
272  * whether the restore failed because there isn't an archive to restore,
273  * or because the administrator has specified the restore program
274  * incorrectly. We have to assume the former.
275  *
276  * However, if the failure was due to any sort of signal, it's best to
277  * punt and abort recovery. (If we "return false" here, upper levels will
278  * assume that recovery is complete and start up the database!) It's
279  * essential to abort on child SIGINT and SIGQUIT, because per spec
280  * system() ignores SIGINT and SIGQUIT while waiting; if we see one of
281  * those it's a good bet we should have gotten it too.
282  *
283  * On SIGTERM, assume we have received a fast shutdown request, and exit
284  * cleanly. It's pure chance whether we receive the SIGTERM first, or the
285  * child process. If we receive it first, the signal handler will call
286  * proc_exit, otherwise we do it here. If we or the child process received
287  * SIGTERM for any other reason than a fast shutdown request, postmaster
288  * will perform an immediate shutdown when it sees us exiting
289  * unexpectedly.
290  *
291  * Per the Single Unix Spec, shells report exit status > 128 when a called
292  * command died on a signal. Also, 126 and 127 are used to report
293  * problems such as an unfindable command; treat those as fatal errors
294  * too.
295  */
296  if (WIFSIGNALED(rc) && WTERMSIG(rc) == SIGTERM)
297  proc_exit(1);
298 
299  signaled = WIFSIGNALED(rc) || WEXITSTATUS(rc) > 125;
300 
301  ereport(signaled ? FATAL : DEBUG2,
302  (errmsg("could not restore file \"%s\" from archive: %s",
303  xlogfname, wait_result_to_str(rc))));
304 
305 not_available:
306 
307  /*
308  * if an archived file is not available, there might still be a version of
309  * this file in XLOGDIR, so return that as the filename to open.
310  *
311  * In many recovery scenarios we expect this to fail also, but if so that
312  * just means we've reached the end of WAL.
313  */
314  snprintf(path, MAXPGPATH, XLOGDIR "/%s", xlogfname);
315  return false;
316 }
317 
318 /*
319  * Attempt to execute an external shell command during recovery.
320  *
321  * 'command' is the shell command to be executed, 'commandName' is a
322  * human-readable name describing the command emitted in the logs. If
323  * 'failOnSignal' is true and the command is killed by a signal, a FATAL
324  * error is thrown. Otherwise a WARNING is emitted.
325  *
326  * This is currently used for recovery_end_command and archive_cleanup_command.
327  */
328 void
329 ExecuteRecoveryCommand(char *command, char *commandName, bool failOnSignal)
330 {
331  char xlogRecoveryCmd[MAXPGPATH];
332  char lastRestartPointFname[MAXPGPATH];
333  char *dp;
334  char *endp;
335  const char *sp;
336  int rc;
337  bool signaled;
338  XLogSegNo restartSegNo;
339  XLogRecPtr restartRedoPtr;
340  TimeLineID restartTli;
341 
342  Assert(command && commandName);
343 
344  /*
345  * Calculate the archive file cutoff point for use during log shipping
346  * replication. All files earlier than this point can be deleted from the
347  * archive, though there is no requirement to do so.
348  */
349  GetOldestRestartPoint(&restartRedoPtr, &restartTli);
350  XLByteToSeg(restartRedoPtr, restartSegNo);
351  XLogFileName(lastRestartPointFname, restartTli, restartSegNo);
352 
353  /*
354  * construct the command to be executed
355  */
356  dp = xlogRecoveryCmd;
357  endp = xlogRecoveryCmd + MAXPGPATH - 1;
358  *endp = '\0';
359 
360  for (sp = command; *sp; sp++)
361  {
362  if (*sp == '%')
363  {
364  switch (sp[1])
365  {
366  case 'r':
367  /* %r: filename of last restartpoint */
368  sp++;
369  StrNCpy(dp, lastRestartPointFname, endp - dp);
370  dp += strlen(dp);
371  break;
372  case '%':
373  /* convert %% to a single % */
374  sp++;
375  if (dp < endp)
376  *dp++ = *sp;
377  break;
378  default:
379  /* otherwise treat the % as not special */
380  if (dp < endp)
381  *dp++ = *sp;
382  break;
383  }
384  }
385  else
386  {
387  if (dp < endp)
388  *dp++ = *sp;
389  }
390  }
391  *dp = '\0';
392 
393  ereport(DEBUG3,
394  (errmsg_internal("executing %s \"%s\"", commandName, command)));
395 
396  /*
397  * execute the constructed command
398  */
399  rc = system(xlogRecoveryCmd);
400  if (rc != 0)
401  {
402  /*
403  * If the failure was due to any sort of signal, it's best to punt and
404  * abort recovery. See also detailed comments on signals in
405  * RestoreArchivedFile().
406  */
407  signaled = WIFSIGNALED(rc) || WEXITSTATUS(rc) > 125;
408 
409  ereport((signaled && failOnSignal) ? FATAL : WARNING,
410  /*------
411  translator: First %s represents a recovery.conf parameter name like
412  "recovery_end_command", the 2nd is the value of that parameter, the
413  third an already translated error message. */
414  (errmsg("%s \"%s\": %s", commandName,
415  command, wait_result_to_str(rc))));
416  }
417 }
418 
419 
420 /*
421  * A file was restored from the archive under a temporary filename (path),
422  * and now we want to keep it. Rename it under the permanent filename in
423  * in pg_wal (xlogfname), replacing any existing file with the same name.
424  */
425 void
426 KeepFileRestoredFromArchive(char *path, char *xlogfname)
427 {
428  char xlogfpath[MAXPGPATH];
429  bool reload = false;
430  struct stat statbuf;
431 
432  snprintf(xlogfpath, MAXPGPATH, XLOGDIR "/%s", xlogfname);
433 
434  if (stat(xlogfpath, &statbuf) == 0)
435  {
436  char oldpath[MAXPGPATH];
437 
438 #ifdef WIN32
439  static unsigned int deletedcounter = 1;
440 
441  /*
442  * On Windows, if another process (e.g a walsender process) holds the
443  * file open in FILE_SHARE_DELETE mode, unlink will succeed, but the
444  * file will still show up in directory listing until the last handle
445  * is closed, and we cannot rename the new file in its place until
446  * that. To avoid that problem, rename the old file to a temporary
447  * name first. Use a counter to create a unique filename, because the
448  * same file might be restored from the archive multiple times, and a
449  * walsender could still be holding onto an old deleted version of it.
450  */
451  snprintf(oldpath, MAXPGPATH, "%s.deleted%u",
452  xlogfpath, deletedcounter++);
453  if (rename(xlogfpath, oldpath) != 0)
454  {
455  ereport(ERROR,
457  errmsg("could not rename file \"%s\" to \"%s\": %m",
458  xlogfpath, oldpath)));
459  }
460 #else
461  /* same-size buffers, so this never truncates */
462  strlcpy(oldpath, xlogfpath, MAXPGPATH);
463 #endif
464  if (unlink(oldpath) != 0)
465  ereport(FATAL,
467  errmsg("could not remove file \"%s\": %m",
468  xlogfpath)));
469  reload = true;
470  }
471 
472  durable_rename(path, xlogfpath, ERROR);
473 
474  /*
475  * Create .done file forcibly to prevent the restored segment from being
476  * archived again later.
477  */
479  XLogArchiveForceDone(xlogfname);
480  else
481  XLogArchiveNotify(xlogfname);
482 
483  /*
484  * If the existing file was replaced, since walsenders might have it open,
485  * request them to reload a currently-open segment. This is only required
486  * for WAL segments, walsenders don't hold other files open, but there's
487  * no harm in doing this too often, and we don't know what kind of a file
488  * we're dealing with here.
489  */
490  if (reload)
492 
493  /*
494  * Signal walsender that new WAL has arrived. Again, this isn't necessary
495  * if we restored something other than a WAL segment, but it does no harm
496  * either.
497  */
498  WalSndWakeup();
499 }
500 
501 /*
502  * XLogArchiveNotify
503  *
504  * Create an archive notification file
505  *
506  * The name of the notification file is the message that will be picked up
507  * by the archiver, e.g. we write 0000000100000001000000C6.ready
508  * and the archiver then knows to archive XLOGDIR/0000000100000001000000C6,
509  * then when complete, rename it to 0000000100000001000000C6.done
510  */
511 void
512 XLogArchiveNotify(const char *xlog)
513 {
514  char archiveStatusPath[MAXPGPATH];
515  FILE *fd;
516 
517  /* insert an otherwise empty file called <XLOG>.ready */
518  StatusFilePath(archiveStatusPath, xlog, ".ready");
519  fd = AllocateFile(archiveStatusPath, "w");
520  if (fd == NULL)
521  {
522  ereport(LOG,
524  errmsg("could not create archive status file \"%s\": %m",
525  archiveStatusPath)));
526  return;
527  }
528  if (FreeFile(fd))
529  {
530  ereport(LOG,
532  errmsg("could not write archive status file \"%s\": %m",
533  archiveStatusPath)));
534  return;
535  }
536 
537  /* Notify archiver that it's got something to do */
538  if (IsUnderPostmaster)
540 }
541 
542 /*
543  * Convenience routine to notify using segment number representation of filename
544  */
545 void
547 {
548  char xlog[MAXFNAMELEN];
549 
550  XLogFileName(xlog, ThisTimeLineID, segno);
551  XLogArchiveNotify(xlog);
552 }
553 
554 /*
555  * XLogArchiveForceDone
556  *
557  * Emit notification forcibly that an XLOG segment file has been successfully
558  * archived, by creating <XLOG>.done regardless of whether <XLOG>.ready
559  * exists or not.
560  */
561 void
562 XLogArchiveForceDone(const char *xlog)
563 {
564  char archiveReady[MAXPGPATH];
565  char archiveDone[MAXPGPATH];
566  struct stat stat_buf;
567  FILE *fd;
568 
569  /* Exit if already known done */
570  StatusFilePath(archiveDone, xlog, ".done");
571  if (stat(archiveDone, &stat_buf) == 0)
572  return;
573 
574  /* If .ready exists, rename it to .done */
575  StatusFilePath(archiveReady, xlog, ".ready");
576  if (stat(archiveReady, &stat_buf) == 0)
577  {
578  (void) durable_rename(archiveReady, archiveDone, WARNING);
579  return;
580  }
581 
582  /* insert an otherwise empty file called <XLOG>.done */
583  fd = AllocateFile(archiveDone, "w");
584  if (fd == NULL)
585  {
586  ereport(LOG,
588  errmsg("could not create archive status file \"%s\": %m",
589  archiveDone)));
590  return;
591  }
592  if (FreeFile(fd))
593  {
594  ereport(LOG,
596  errmsg("could not write archive status file \"%s\": %m",
597  archiveDone)));
598  return;
599  }
600 }
601 
602 /*
603  * XLogArchiveCheckDone
604  *
605  * This is called when we are ready to delete or recycle an old XLOG segment
606  * file or backup history file. If it is okay to delete it then return true.
607  * If it is not time to delete it, make sure a .ready file exists, and return
608  * false.
609  *
610  * If <XLOG>.done exists, then return true; else if <XLOG>.ready exists,
611  * then return false; else create <XLOG>.ready and return false.
612  *
613  * The reason we do things this way is so that if the original attempt to
614  * create <XLOG>.ready fails, we'll retry during subsequent checkpoints.
615  */
616 bool
617 XLogArchiveCheckDone(const char *xlog)
618 {
619  char archiveStatusPath[MAXPGPATH];
620  struct stat stat_buf;
621 
622  /* Always deletable if archiving is off */
623  if (!XLogArchivingActive())
624  return true;
625 
626  /* First check for .done --- this means archiver is done with it */
627  StatusFilePath(archiveStatusPath, xlog, ".done");
628  if (stat(archiveStatusPath, &stat_buf) == 0)
629  return true;
630 
631  /* check for .ready --- this means archiver is still busy with it */
632  StatusFilePath(archiveStatusPath, xlog, ".ready");
633  if (stat(archiveStatusPath, &stat_buf) == 0)
634  return false;
635 
636  /* Race condition --- maybe archiver just finished, so recheck */
637  StatusFilePath(archiveStatusPath, xlog, ".done");
638  if (stat(archiveStatusPath, &stat_buf) == 0)
639  return true;
640 
641  /* Retry creation of the .ready file */
642  XLogArchiveNotify(xlog);
643  return false;
644 }
645 
646 /*
647  * XLogArchiveIsBusy
648  *
649  * Check to see if an XLOG segment file is still unarchived.
650  * This is almost but not quite the inverse of XLogArchiveCheckDone: in
651  * the first place we aren't chartered to recreate the .ready file, and
652  * in the second place we should consider that if the file is already gone
653  * then it's not busy. (This check is needed to handle the race condition
654  * that a checkpoint already deleted the no-longer-needed file.)
655  */
656 bool
657 XLogArchiveIsBusy(const char *xlog)
658 {
659  char archiveStatusPath[MAXPGPATH];
660  struct stat stat_buf;
661 
662  /* First check for .done --- this means archiver is done with it */
663  StatusFilePath(archiveStatusPath, xlog, ".done");
664  if (stat(archiveStatusPath, &stat_buf) == 0)
665  return false;
666 
667  /* check for .ready --- this means archiver is still busy with it */
668  StatusFilePath(archiveStatusPath, xlog, ".ready");
669  if (stat(archiveStatusPath, &stat_buf) == 0)
670  return true;
671 
672  /* Race condition --- maybe archiver just finished, so recheck */
673  StatusFilePath(archiveStatusPath, xlog, ".done");
674  if (stat(archiveStatusPath, &stat_buf) == 0)
675  return false;
676 
677  /*
678  * Check to see if the WAL file has been removed by checkpoint, which
679  * implies it has already been archived, and explains why we can't see a
680  * status file for it.
681  */
682  snprintf(archiveStatusPath, MAXPGPATH, XLOGDIR "/%s", xlog);
683  if (stat(archiveStatusPath, &stat_buf) != 0 &&
684  errno == ENOENT)
685  return false;
686 
687  return true;
688 }
689 
690 /*
691  * XLogArchiveIsReadyOrDone
692  *
693  * Check to see if an XLOG segment file has a .ready or .done file.
694  * This is similar to XLogArchiveIsBusy(), but returns true if the file
695  * is already archived or is about to be archived.
696  *
697  * This is currently only used at recovery. During normal operation this
698  * would be racy: the file might get removed or marked with .ready as we're
699  * checking it, or immediately after we return.
700  */
701 bool
702 XLogArchiveIsReadyOrDone(const char *xlog)
703 {
704  char archiveStatusPath[MAXPGPATH];
705  struct stat stat_buf;
706 
707  /* First check for .done --- this means archiver is done with it */
708  StatusFilePath(archiveStatusPath, xlog, ".done");
709  if (stat(archiveStatusPath, &stat_buf) == 0)
710  return true;
711 
712  /* check for .ready --- this means archiver is still busy with it */
713  StatusFilePath(archiveStatusPath, xlog, ".ready");
714  if (stat(archiveStatusPath, &stat_buf) == 0)
715  return true;
716 
717  /* Race condition --- maybe archiver just finished, so recheck */
718  StatusFilePath(archiveStatusPath, xlog, ".done");
719  if (stat(archiveStatusPath, &stat_buf) == 0)
720  return true;
721 
722  return false;
723 }
724 
725 /*
726  * XLogArchiveIsReady
727  *
728  * Check to see if an XLOG segment file has an archive notification (.ready)
729  * file.
730  */
731 bool
732 XLogArchiveIsReady(const char *xlog)
733 {
734  char archiveStatusPath[MAXPGPATH];
735  struct stat stat_buf;
736 
737  StatusFilePath(archiveStatusPath, xlog, ".ready");
738  if (stat(archiveStatusPath, &stat_buf) == 0)
739  return true;
740 
741  return false;
742 }
743 
744 /*
745  * XLogArchiveCleanup
746  *
747  * Cleanup archive notification file(s) for a particular xlog segment
748  */
749 void
750 XLogArchiveCleanup(const char *xlog)
751 {
752  char archiveStatusPath[MAXPGPATH];
753 
754  /* Remove the .done file */
755  StatusFilePath(archiveStatusPath, xlog, ".done");
756  unlink(archiveStatusPath);
757  /* should we complain about failure? */
758 
759  /* Remove the .ready file if present --- normally it shouldn't be */
760  StatusFilePath(archiveStatusPath, xlog, ".ready");
761  unlink(archiveStatusPath);
762  /* should we complain about failure? */
763 }
#define StatusFilePath(path, xlog, suffix)
bool XLogArchiveIsReadyOrDone(const char *xlog)
Definition: xlogarchive.c:702
bool StandbyMode
Definition: xlog.c:277
#define DEBUG1
Definition: elog.h:25
uint32 TimeLineID
Definition: xlogdefs.h:45
#define DEBUG3
Definition: elog.h:23
void KeepFileRestoredFromArchive(char *path, char *xlogfname)
Definition: xlogarchive.c:426
void make_native_path(char *path)
Definition: path.c:166
void GetOldestRestartPoint(XLogRecPtr *oldrecptr, TimeLineID *oldtli)
Definition: xlog.c:11112
#define XLogFileName(fname, tli, logSegNo)
bool RestoreArchivedFile(char *path, const char *xlogfname, const char *recovername, off_t expectedSize, bool cleanupEnabled)
Definition: xlogarchive.c:51
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Definition: ipc.c:99
int snprintf(char *str, size_t count, const char *fmt,...) pg_attribute_printf(3
#define LOG
Definition: elog.h:26
char * wait_result_to_str(int exitstatus)
Definition: wait_error.c:32
static int fd(const char *x, int i)
Definition: preproc-init.c:105
void XLogArchiveCleanup(const char *xlog)
Definition: xlogarchive.c:750
void XLogArchiveNotify(const char *xlog)
Definition: xlogarchive.c:512
void WalSndRqstFileReload(void)
Definition: walsender.c:2796
void PostRestoreCommand(void)
Definition: startup.c:241
#define ERROR
Definition: elog.h:43
#define WIFSIGNALED(w)
Definition: win32.h:181
bool XLogArchiveCheckDone(const char *xlog)
Definition: xlogarchive.c:617
#define FATAL
Definition: elog.h:52
#define MAXPGPATH
char * recoveryRestoreCommand
Definition: xlog.c:257
#define DEBUG2
Definition: elog.h:24
bool IsUnderPostmaster
Definition: globals.c:100
uint64 XLogSegNo
Definition: xlogdefs.h:34
int XLogArchiveMode
Definition: xlog.c:94
int errcode_for_file_access(void)
Definition: elog.c:598
FILE * AllocateFile(const char *name, const char *mode)
Definition: fd.c:2094
int unlink(const char *filename)
#define ereport(elevel, rest)
Definition: elog.h:122
int durable_rename(const char *oldfile, const char *newfile, int elevel)
Definition: fd.c:593
void ExecuteRecoveryCommand(char *command, char *commandName, bool failOnSignal)
Definition: xlogarchive.c:329
bool XLogArchiveIsReady(const char *xlog)
Definition: xlogarchive.c:732
#define WARNING
Definition: elog.h:40
#define MAXFNAMELEN
static int elevel
Definition: vacuumlazy.c:137
void XLogArchiveForceDone(const char *xlog)
Definition: xlogarchive.c:562
#define XLOGDIR
static char xlogfpath[MAXPGPATH]
Definition: parsexlog.c:43
TimeLineID ThisTimeLineID
Definition: xlog.c:179
size_t strlcpy(char *dst, const char *src, size_t siz)
Definition: strlcpy.c:45
int errmsg_internal(const char *fmt,...)
Definition: elog.c:827
#define XLByteToSeg(xlrp, logSegNo)
bool XLogArchiveIsBusy(const char *xlog)
Definition: xlogarchive.c:657
#define WEXITSTATUS(w)
Definition: win32.h:182
#define NULL
Definition: c.h:229
uint64 XLogRecPtr
Definition: xlogdefs.h:21
#define Assert(condition)
Definition: c.h:675
#define StrNCpy(dst, src, len)
Definition: c.h:830
#define XLogArchivingActive()
Definition: xlog.h:134
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Definition: fd.c:2277
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Definition: startup.c:227
int errmsg(const char *fmt,...)
Definition: elog.c:797
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Definition: xlogarchive.c:546
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Definition: pmsignal.c:113
#define WTERMSIG(w)
Definition: win32.h:183
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Definition: walsender.c:2928
static volatile sig_atomic_t signaled
Definition: pg_standby.c:51