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streamutil.c
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1 /*-------------------------------------------------------------------------
2  *
3  * streamutil.c - utility functions for pg_basebackup, pg_receivewal and
4  * pg_recvlogical
5  *
6  * Author: Magnus Hagander <magnus@hagander.net>
7  *
8  * Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
9  *
10  * IDENTIFICATION
11  * src/bin/pg_basebackup/streamutil.c
12  *-------------------------------------------------------------------------
13  */
14 
15 #include "postgres_fe.h"
16 
17 #include <sys/time.h>
18 #include <unistd.h>
19 
20 #include "access/xlog_internal.h"
21 #include "common/connect.h"
22 #include "common/fe_memutils.h"
23 #include "common/file_perm.h"
24 #include "common/logging.h"
25 #include "common/string.h"
26 #include "datatype/timestamp.h"
27 #include "port/pg_bswap.h"
28 #include "pqexpbuffer.h"
29 #include "receivelog.h"
30 #include "streamutil.h"
31 
32 #define ERRCODE_DUPLICATE_OBJECT "42710"
33 
35 
37 
38 /* SHOW command for replication connection was introduced in version 10 */
39 #define MINIMUM_VERSION_FOR_SHOW_CMD 100000
40 
41 /*
42  * Group access is supported from version 11.
43  */
44 #define MINIMUM_VERSION_FOR_GROUP_ACCESS 110000
45 
46 const char *progname;
47 char *connection_string = NULL;
48 char *dbhost = NULL;
49 char *dbuser = NULL;
50 char *dbport = NULL;
51 char *dbname = NULL;
52 int dbgetpassword = 0; /* 0=auto, -1=never, 1=always */
53 static char *password = NULL;
54 PGconn *conn = NULL;
55 
56 /*
57  * Connect to the server. Returns a valid PGconn pointer if connected,
58  * or NULL on non-permanent error. On permanent error, the function will
59  * call exit(1) directly.
60  */
61 PGconn *
63 {
64  PGconn *tmpconn;
65  int argcount = 7; /* dbname, replication, fallback_app_name,
66  * host, user, port, password */
67  int i;
68  const char **keywords;
69  const char **values;
70  const char *tmpparam;
71  bool need_password;
72  PQconninfoOption *conn_opts = NULL;
73  PQconninfoOption *conn_opt;
74  char *err_msg = NULL;
75 
76  /* pg_recvlogical uses dbname only; others use connection_string only. */
77  Assert(dbname == NULL || connection_string == NULL);
78 
79  /*
80  * Merge the connection info inputs given in form of connection string,
81  * options and default values (dbname=replication, replication=true, etc.)
82  */
83  i = 0;
85  {
86  conn_opts = PQconninfoParse(connection_string, &err_msg);
87  if (conn_opts == NULL)
88  pg_fatal("%s", err_msg);
89 
90  for (conn_opt = conn_opts; conn_opt->keyword != NULL; conn_opt++)
91  {
92  if (conn_opt->val != NULL && conn_opt->val[0] != '\0')
93  argcount++;
94  }
95 
96  keywords = pg_malloc0((argcount + 1) * sizeof(*keywords));
97  values = pg_malloc0((argcount + 1) * sizeof(*values));
98 
99  /*
100  * Set dbname here already, so it can be overridden by a dbname in the
101  * connection string.
102  */
103  keywords[i] = "dbname";
104  values[i] = "replication";
105  i++;
106 
107  for (conn_opt = conn_opts; conn_opt->keyword != NULL; conn_opt++)
108  {
109  if (conn_opt->val != NULL && conn_opt->val[0] != '\0')
110  {
111  keywords[i] = conn_opt->keyword;
112  values[i] = conn_opt->val;
113  i++;
114  }
115  }
116  }
117  else
118  {
119  keywords = pg_malloc0((argcount + 1) * sizeof(*keywords));
120  values = pg_malloc0((argcount + 1) * sizeof(*values));
121  keywords[i] = "dbname";
122  values[i] = dbname;
123  i++;
124  }
125 
126  keywords[i] = "replication";
127  values[i] = dbname == NULL ? "true" : "database";
128  i++;
129  keywords[i] = "fallback_application_name";
130  values[i] = progname;
131  i++;
132 
133  if (dbhost)
134  {
135  keywords[i] = "host";
136  values[i] = dbhost;
137  i++;
138  }
139  if (dbuser)
140  {
141  keywords[i] = "user";
142  values[i] = dbuser;
143  i++;
144  }
145  if (dbport)
146  {
147  keywords[i] = "port";
148  values[i] = dbport;
149  i++;
150  }
151 
152  /* If -W was given, force prompt for password, but only the first time */
153  need_password = (dbgetpassword == 1 && !password);
154 
155  do
156  {
157  /* Get a new password if appropriate */
158  if (need_password)
159  {
160  free(password);
161  password = simple_prompt("Password: ", false);
162  need_password = false;
163  }
164 
165  /* Use (or reuse, on a subsequent connection) password if we have it */
166  if (password)
167  {
168  keywords[i] = "password";
169  values[i] = password;
170  }
171  else
172  {
173  keywords[i] = NULL;
174  values[i] = NULL;
175  }
176 
177  /*
178  * Only expand dbname when we did not already parse the argument as a
179  * connection string ourselves.
180  */
181  tmpconn = PQconnectdbParams(keywords, values, !connection_string);
182 
183  /*
184  * If there is too little memory even to allocate the PGconn object
185  * and PQconnectdbParams returns NULL, we call exit(1) directly.
186  */
187  if (!tmpconn)
188  pg_fatal("could not connect to server");
189 
190  /* If we need a password and -w wasn't given, loop back and get one */
191  if (PQstatus(tmpconn) == CONNECTION_BAD &&
192  PQconnectionNeedsPassword(tmpconn) &&
193  dbgetpassword != -1)
194  {
195  PQfinish(tmpconn);
196  need_password = true;
197  }
198  }
199  while (need_password);
200 
201  if (PQstatus(tmpconn) != CONNECTION_OK)
202  {
203  pg_log_error("%s", PQerrorMessage(tmpconn));
204  PQfinish(tmpconn);
205  free(values);
206  free(keywords);
207  PQconninfoFree(conn_opts);
208  return NULL;
209  }
210 
211  /* Connection ok! */
212  free(values);
213  free(keywords);
214  PQconninfoFree(conn_opts);
215 
216  /*
217  * Set always-secure search path, so malicious users can't get control.
218  * The capacity to run normal SQL queries was added in PostgreSQL 10, so
219  * the search path cannot be changed (by us or attackers) on earlier
220  * versions.
221  */
222  if (dbname != NULL && PQserverVersion(tmpconn) >= 100000)
223  {
224  PGresult *res;
225 
228  {
229  pg_log_error("could not clear search_path: %s",
230  PQerrorMessage(tmpconn));
231  PQclear(res);
232  PQfinish(tmpconn);
233  exit(1);
234  }
235  PQclear(res);
236  }
237 
238  /*
239  * Ensure we have the same value of integer_datetimes (now always "on") as
240  * the server we are connecting to.
241  */
242  tmpparam = PQparameterStatus(tmpconn, "integer_datetimes");
243  if (!tmpparam)
244  {
245  pg_log_error("could not determine server setting for integer_datetimes");
246  PQfinish(tmpconn);
247  exit(1);
248  }
249 
250  if (strcmp(tmpparam, "on") != 0)
251  {
252  pg_log_error("integer_datetimes compile flag does not match server");
253  PQfinish(tmpconn);
254  exit(1);
255  }
256 
257  /*
258  * Retrieve the source data directory mode and use it to construct a umask
259  * for creating directories and files.
260  */
261  if (!RetrieveDataDirCreatePerm(tmpconn))
262  {
263  PQfinish(tmpconn);
264  exit(1);
265  }
266 
267  return tmpconn;
268 }
269 
270 /*
271  * From version 10, explicitly set wal segment size using SHOW wal_segment_size
272  * since ControlFile is not accessible here.
273  */
274 bool
276 {
277  PGresult *res;
278  char xlog_unit[3];
279  int xlog_val,
280  multiplier = 1;
281 
282  /* check connection existence */
283  Assert(conn != NULL);
284 
285  /* for previous versions set the default xlog seg size */
287  {
289  return true;
290  }
291 
292  res = PQexec(conn, "SHOW wal_segment_size");
294  {
295  pg_log_error("could not send replication command \"%s\": %s",
296  "SHOW wal_segment_size", PQerrorMessage(conn));
297 
298  PQclear(res);
299  return false;
300  }
301  if (PQntuples(res) != 1 || PQnfields(res) < 1)
302  {
303  pg_log_error("could not fetch WAL segment size: got %d rows and %d fields, expected %d rows and %d or more fields",
304  PQntuples(res), PQnfields(res), 1, 1);
305 
306  PQclear(res);
307  return false;
308  }
309 
310  /* fetch xlog value and unit from the result */
311  if (sscanf(PQgetvalue(res, 0, 0), "%d%2s", &xlog_val, xlog_unit) != 2)
312  {
313  pg_log_error("WAL segment size could not be parsed");
314  PQclear(res);
315  return false;
316  }
317 
318  PQclear(res);
319 
320  /* set the multiplier based on unit to convert xlog_val to bytes */
321  if (strcmp(xlog_unit, "MB") == 0)
322  multiplier = 1024 * 1024;
323  else if (strcmp(xlog_unit, "GB") == 0)
324  multiplier = 1024 * 1024 * 1024;
325 
326  /* convert and set WalSegSz */
327  WalSegSz = xlog_val * multiplier;
328 
330  {
331  pg_log_error(ngettext("remote server reported invalid WAL segment size (%d byte)",
332  "remote server reported invalid WAL segment size (%d bytes)",
333  WalSegSz),
334  WalSegSz);
335  pg_log_error_detail("The WAL segment size must be a power of two between 1 MB and 1 GB.");
336  return false;
337  }
338 
339  return true;
340 }
341 
342 /*
343  * RetrieveDataDirCreatePerm
344  *
345  * This function is used to determine the privileges on the server's PG data
346  * directory and, based on that, set what the permissions will be for
347  * directories and files we create.
348  *
349  * PG11 added support for (optionally) group read/execute rights to be set on
350  * the data directory. Prior to PG11, only the owner was allowed to have rights
351  * on the data directory.
352  */
353 static bool
355 {
356  PGresult *res;
358 
359  /* check connection existence */
360  Assert(conn != NULL);
361 
362  /* for previous versions leave the default group access */
364  return true;
365 
366  res = PQexec(conn, "SHOW data_directory_mode");
368  {
369  pg_log_error("could not send replication command \"%s\": %s",
370  "SHOW data_directory_mode", PQerrorMessage(conn));
371 
372  PQclear(res);
373  return false;
374  }
375  if (PQntuples(res) != 1 || PQnfields(res) < 1)
376  {
377  pg_log_error("could not fetch group access flag: got %d rows and %d fields, expected %d rows and %d or more fields",
378  PQntuples(res), PQnfields(res), 1, 1);
379 
380  PQclear(res);
381  return false;
382  }
383 
384  if (sscanf(PQgetvalue(res, 0, 0), "%o", &data_directory_mode) != 1)
385  {
386  pg_log_error("group access flag could not be parsed: %s",
387  PQgetvalue(res, 0, 0));
388 
389  PQclear(res);
390  return false;
391  }
392 
394 
395  PQclear(res);
396  return true;
397 }
398 
399 /*
400  * Run IDENTIFY_SYSTEM through a given connection and give back to caller
401  * some result information if requested:
402  * - System identifier
403  * - Current timeline ID
404  * - Start LSN position
405  * - Database name (NULL in servers prior to 9.4)
406  */
407 bool
408 RunIdentifySystem(PGconn *conn, char **sysid, TimeLineID *starttli,
409  XLogRecPtr *startpos, char **db_name)
410 {
411  PGresult *res;
412  uint32 hi,
413  lo;
414 
415  /* Check connection existence */
416  Assert(conn != NULL);
417 
418  res = PQexec(conn, "IDENTIFY_SYSTEM");
420  {
421  pg_log_error("could not send replication command \"%s\": %s",
422  "IDENTIFY_SYSTEM", PQerrorMessage(conn));
423 
424  PQclear(res);
425  return false;
426  }
427  if (PQntuples(res) != 1 || PQnfields(res) < 3)
428  {
429  pg_log_error("could not identify system: got %d rows and %d fields, expected %d rows and %d or more fields",
430  PQntuples(res), PQnfields(res), 1, 3);
431 
432  PQclear(res);
433  return false;
434  }
435 
436  /* Get system identifier */
437  if (sysid != NULL)
438  *sysid = pg_strdup(PQgetvalue(res, 0, 0));
439 
440  /* Get timeline ID to start streaming from */
441  if (starttli != NULL)
442  *starttli = atoi(PQgetvalue(res, 0, 1));
443 
444  /* Get LSN start position if necessary */
445  if (startpos != NULL)
446  {
447  if (sscanf(PQgetvalue(res, 0, 2), "%X/%X", &hi, &lo) != 2)
448  {
449  pg_log_error("could not parse write-ahead log location \"%s\"",
450  PQgetvalue(res, 0, 2));
451 
452  PQclear(res);
453  return false;
454  }
455  *startpos = ((uint64) hi) << 32 | lo;
456  }
457 
458  /* Get database name, only available in 9.4 and newer versions */
459  if (db_name != NULL)
460  {
461  *db_name = NULL;
462  if (PQserverVersion(conn) >= 90400)
463  {
464  if (PQnfields(res) < 4)
465  {
466  pg_log_error("could not identify system: got %d rows and %d fields, expected %d rows and %d or more fields",
467  PQntuples(res), PQnfields(res), 1, 4);
468 
469  PQclear(res);
470  return false;
471  }
472  if (!PQgetisnull(res, 0, 3))
473  *db_name = pg_strdup(PQgetvalue(res, 0, 3));
474  }
475  }
476 
477  PQclear(res);
478  return true;
479 }
480 
481 /*
482  * Run READ_REPLICATION_SLOT through a given connection and give back to
483  * caller some result information if requested for this slot:
484  * - Start LSN position, InvalidXLogRecPtr if unknown.
485  * - Current timeline ID, 0 if unknown.
486  * Returns false on failure, and true otherwise.
487  */
488 bool
489 GetSlotInformation(PGconn *conn, const char *slot_name,
490  XLogRecPtr *restart_lsn, TimeLineID *restart_tli)
491 {
492  PGresult *res;
493  PQExpBuffer query;
494  XLogRecPtr lsn_loc = InvalidXLogRecPtr;
495  TimeLineID tli_loc = 0;
496 
497  if (restart_lsn)
498  *restart_lsn = lsn_loc;
499  if (restart_tli)
500  *restart_tli = tli_loc;
501 
502  query = createPQExpBuffer();
503  appendPQExpBuffer(query, "READ_REPLICATION_SLOT %s", slot_name);
504  res = PQexec(conn, query->data);
505  destroyPQExpBuffer(query);
506 
508  {
509  pg_log_error("could not send replication command \"%s\": %s",
510  "READ_REPLICATION_SLOT", PQerrorMessage(conn));
511  PQclear(res);
512  return false;
513  }
514 
515  /* The command should always return precisely one tuple and three fields */
516  if (PQntuples(res) != 1 || PQnfields(res) != 3)
517  {
518  pg_log_error("could not read replication slot \"%s\": got %d rows and %d fields, expected %d rows and %d fields",
519  slot_name, PQntuples(res), PQnfields(res), 1, 3);
520  PQclear(res);
521  return false;
522  }
523 
524  /*
525  * When the slot doesn't exist, the command returns a tuple with NULL
526  * values. This checks only the slot type field.
527  */
528  if (PQgetisnull(res, 0, 0))
529  {
530  pg_log_error("replication slot \"%s\" does not exist", slot_name);
531  PQclear(res);
532  return false;
533  }
534 
535  /*
536  * Note that this cannot happen as READ_REPLICATION_SLOT supports only
537  * physical slots, but play it safe.
538  */
539  if (strcmp(PQgetvalue(res, 0, 0), "physical") != 0)
540  {
541  pg_log_error("expected a physical replication slot, got type \"%s\" instead",
542  PQgetvalue(res, 0, 0));
543  PQclear(res);
544  return false;
545  }
546 
547  /* restart LSN */
548  if (!PQgetisnull(res, 0, 1))
549  {
550  uint32 hi,
551  lo;
552 
553  if (sscanf(PQgetvalue(res, 0, 1), "%X/%X", &hi, &lo) != 2)
554  {
555  pg_log_error("could not parse restart_lsn \"%s\" for replication slot \"%s\"",
556  PQgetvalue(res, 0, 1), slot_name);
557  PQclear(res);
558  return false;
559  }
560  lsn_loc = ((uint64) hi) << 32 | lo;
561  }
562 
563  /* current TLI */
564  if (!PQgetisnull(res, 0, 2))
565  tli_loc = (TimeLineID) atol(PQgetvalue(res, 0, 2));
566 
567  PQclear(res);
568 
569  /* Assign results if requested */
570  if (restart_lsn)
571  *restart_lsn = lsn_loc;
572  if (restart_tli)
573  *restart_tli = tli_loc;
574 
575  return true;
576 }
577 
578 /*
579  * Create a replication slot for the given connection. This function
580  * returns true in case of success.
581  */
582 bool
583 CreateReplicationSlot(PGconn *conn, const char *slot_name, const char *plugin,
584  bool is_temporary, bool is_physical, bool reserve_wal,
585  bool slot_exists_ok, bool two_phase)
586 {
587  PQExpBuffer query;
588  PGresult *res;
589  bool use_new_option_syntax = (PQserverVersion(conn) >= 150000);
590 
591  query = createPQExpBuffer();
592 
593  Assert((is_physical && plugin == NULL) ||
594  (!is_physical && plugin != NULL));
595  Assert(!(two_phase && is_physical));
596  Assert(slot_name != NULL);
597 
598  /* Build base portion of query */
599  appendPQExpBuffer(query, "CREATE_REPLICATION_SLOT \"%s\"", slot_name);
600  if (is_temporary)
601  appendPQExpBufferStr(query, " TEMPORARY");
602  if (is_physical)
603  appendPQExpBufferStr(query, " PHYSICAL");
604  else
605  appendPQExpBuffer(query, " LOGICAL \"%s\"", plugin);
606 
607  /* Add any requested options */
608  if (use_new_option_syntax)
609  appendPQExpBufferStr(query, " (");
610  if (is_physical)
611  {
612  if (reserve_wal)
613  AppendPlainCommandOption(query, use_new_option_syntax,
614  "RESERVE_WAL");
615  }
616  else
617  {
618  if (two_phase && PQserverVersion(conn) >= 150000)
619  AppendPlainCommandOption(query, use_new_option_syntax,
620  "TWO_PHASE");
621 
622  if (PQserverVersion(conn) >= 100000)
623  {
624  /* pg_recvlogical doesn't use an exported snapshot, so suppress */
625  if (use_new_option_syntax)
626  AppendStringCommandOption(query, use_new_option_syntax,
627  "SNAPSHOT", "nothing");
628  else
629  AppendPlainCommandOption(query, use_new_option_syntax,
630  "NOEXPORT_SNAPSHOT");
631  }
632  }
633  if (use_new_option_syntax)
634  {
635  /* Suppress option list if it would be empty, otherwise terminate */
636  if (query->data[query->len - 1] == '(')
637  {
638  query->len -= 2;
639  query->data[query->len] = '\0';
640  }
641  else
642  appendPQExpBufferChar(query, ')');
643  }
644 
645  /* Now run the query */
646  res = PQexec(conn, query->data);
648  {
649  const char *sqlstate = PQresultErrorField(res, PG_DIAG_SQLSTATE);
650 
651  if (slot_exists_ok &&
652  sqlstate &&
653  strcmp(sqlstate, ERRCODE_DUPLICATE_OBJECT) == 0)
654  {
655  destroyPQExpBuffer(query);
656  PQclear(res);
657  return true;
658  }
659  else
660  {
661  pg_log_error("could not send replication command \"%s\": %s",
662  query->data, PQerrorMessage(conn));
663 
664  destroyPQExpBuffer(query);
665  PQclear(res);
666  return false;
667  }
668  }
669 
670  if (PQntuples(res) != 1 || PQnfields(res) != 4)
671  {
672  pg_log_error("could not create replication slot \"%s\": got %d rows and %d fields, expected %d rows and %d fields",
673  slot_name,
674  PQntuples(res), PQnfields(res), 1, 4);
675 
676  destroyPQExpBuffer(query);
677  PQclear(res);
678  return false;
679  }
680 
681  destroyPQExpBuffer(query);
682  PQclear(res);
683  return true;
684 }
685 
686 /*
687  * Drop a replication slot for the given connection. This function
688  * returns true in case of success.
689  */
690 bool
691 DropReplicationSlot(PGconn *conn, const char *slot_name)
692 {
693  PQExpBuffer query;
694  PGresult *res;
695 
696  Assert(slot_name != NULL);
697 
698  query = createPQExpBuffer();
699 
700  /* Build query */
701  appendPQExpBuffer(query, "DROP_REPLICATION_SLOT \"%s\"",
702  slot_name);
703  res = PQexec(conn, query->data);
705  {
706  pg_log_error("could not send replication command \"%s\": %s",
707  query->data, PQerrorMessage(conn));
708 
709  destroyPQExpBuffer(query);
710  PQclear(res);
711  return false;
712  }
713 
714  if (PQntuples(res) != 0 || PQnfields(res) != 0)
715  {
716  pg_log_error("could not drop replication slot \"%s\": got %d rows and %d fields, expected %d rows and %d fields",
717  slot_name,
718  PQntuples(res), PQnfields(res), 0, 0);
719 
720  destroyPQExpBuffer(query);
721  PQclear(res);
722  return false;
723  }
724 
725  destroyPQExpBuffer(query);
726  PQclear(res);
727  return true;
728 }
729 
730 /*
731  * Append a "plain" option - one with no value - to a server command that
732  * is being constructed.
733  *
734  * In the old syntax, all options were parser keywords, so you could just
735  * write things like SOME_COMMAND OPTION1 OPTION2 'opt2value' OPTION3 42. The
736  * new syntax uses a comma-separated list surrounded by parentheses, so the
737  * equivalent is SOME_COMMAND (OPTION1, OPTION2 'optvalue', OPTION3 42).
738  */
739 void
740 AppendPlainCommandOption(PQExpBuffer buf, bool use_new_option_syntax,
741  char *option_name)
742 {
743  if (buf->len > 0 && buf->data[buf->len - 1] != '(')
744  {
745  if (use_new_option_syntax)
746  appendPQExpBufferStr(buf, ", ");
747  else
749  }
750 
751  appendPQExpBuffer(buf, " %s", option_name);
752 }
753 
754 /*
755  * Append an option with an associated string value to a server command that
756  * is being constructed.
757  *
758  * See comments for AppendPlainCommandOption, above.
759  */
760 void
761 AppendStringCommandOption(PQExpBuffer buf, bool use_new_option_syntax,
762  char *option_name, char *option_value)
763 {
764  AppendPlainCommandOption(buf, use_new_option_syntax, option_name);
765 
766  if (option_value != NULL)
767  {
768  size_t length = strlen(option_value);
769  char *escaped_value = palloc(1 + 2 * length);
770 
771  PQescapeStringConn(conn, escaped_value, option_value, length, NULL);
772  appendPQExpBuffer(buf, " '%s'", escaped_value);
773  pfree(escaped_value);
774  }
775 }
776 
777 /*
778  * Append an option with an associated integer value to a server command
779  * is being constructed.
780  *
781  * See comments for AppendPlainCommandOption, above.
782  */
783 void
784 AppendIntegerCommandOption(PQExpBuffer buf, bool use_new_option_syntax,
785  char *option_name, int32 option_value)
786 {
787  AppendPlainCommandOption(buf, use_new_option_syntax, option_name);
788 
789  appendPQExpBuffer(buf, " %d", option_value);
790 }
791 
792 /*
793  * Frontend version of GetCurrentTimestamp(), since we are not linked with
794  * backend code.
795  */
798 {
799  TimestampTz result;
800  struct timeval tp;
801 
802  gettimeofday(&tp, NULL);
803 
804  result = (TimestampTz) tp.tv_sec -
806  result = (result * USECS_PER_SEC) + tp.tv_usec;
807 
808  return result;
809 }
810 
811 /*
812  * Frontend version of TimestampDifference(), since we are not linked with
813  * backend code.
814  */
815 void
817  long *secs, int *microsecs)
818 {
819  TimestampTz diff = stop_time - start_time;
820 
821  if (diff <= 0)
822  {
823  *secs = 0;
824  *microsecs = 0;
825  }
826  else
827  {
828  *secs = (long) (diff / USECS_PER_SEC);
829  *microsecs = (int) (diff % USECS_PER_SEC);
830  }
831 }
832 
833 /*
834  * Frontend version of TimestampDifferenceExceeds(), since we are not
835  * linked with backend code.
836  */
837 bool
839  TimestampTz stop_time,
840  int msec)
841 {
842  TimestampTz diff = stop_time - start_time;
843 
844  return (diff >= msec * INT64CONST(1000));
845 }
846 
847 /*
848  * Converts an int64 to network byte order.
849  */
850 void
851 fe_sendint64(int64 i, char *buf)
852 {
853  uint64 n64 = pg_hton64(i);
854 
855  memcpy(buf, &n64, sizeof(n64));
856 }
857 
858 /*
859  * Converts an int64 from network byte order to native format.
860  */
861 int64
863 {
864  uint64 n64;
865 
866  memcpy(&n64, buf, sizeof(n64));
867 
868  return pg_ntoh64(n64);
869 }
static Datum values[MAXATTR]
Definition: bootstrap.c:156
unsigned int uint32
Definition: c.h:495
signed int int32
Definition: c.h:483
#define ngettext(s, p, n)
Definition: c.h:1170
#define ALWAYS_SECURE_SEARCH_PATH_SQL
Definition: connect.h:25
int64 TimestampTz
Definition: timestamp.h:39
#define USECS_PER_SEC
Definition: timestamp.h:134
#define UNIX_EPOCH_JDATE
Definition: timestamp.h:234
#define SECS_PER_DAY
Definition: timestamp.h:126
#define POSTGRES_EPOCH_JDATE
Definition: timestamp.h:235
const char * PQparameterStatus(const PGconn *conn, const char *paramName)
Definition: fe-connect.c:6806
int PQserverVersion(const PGconn *conn)
Definition: fe-connect.c:6831
PQconninfoOption * PQconninfoParse(const char *conninfo, char **errmsg)
Definition: fe-connect.c:5422
PGconn * PQconnectdbParams(const char *const *keywords, const char *const *values, int expand_dbname)
Definition: fe-connect.c:669
void PQconninfoFree(PQconninfoOption *connOptions)
Definition: fe-connect.c:6674
int PQconnectionNeedsPassword(const PGconn *conn)
Definition: fe-connect.c:6892
char * PQerrorMessage(const PGconn *conn)
Definition: fe-connect.c:6841
ConnStatusType PQstatus(const PGconn *conn)
Definition: fe-connect.c:6788
void PQfinish(PGconn *conn)
Definition: fe-connect.c:4562
size_t PQescapeStringConn(PGconn *conn, char *to, const char *from, size_t length, int *error)
Definition: fe-exec.c:4105
ExecStatusType PQresultStatus(const PGresult *res)
Definition: fe-exec.c:3371
int PQntuples(const PGresult *res)
Definition: fe-exec.c:3441
PGresult * PQexec(PGconn *conn, const char *query)
Definition: fe-exec.c:2224
char * PQgetvalue(const PGresult *res, int tup_num, int field_num)
Definition: fe-exec.c:3836
int PQgetisnull(const PGresult *res, int tup_num, int field_num)
Definition: fe-exec.c:3861
char * PQresultErrorField(const PGresult *res, int fieldcode)
Definition: fe-exec.c:3426
int PQnfields(const PGresult *res)
Definition: fe-exec.c:3449
void * pg_malloc0(size_t size)
Definition: fe_memutils.c:53
char * pg_strdup(const char *in)
Definition: fe_memutils.c:85
void SetDataDirectoryCreatePerm(int dataDirMode)
Definition: file_perm.c:34
int data_directory_mode
Definition: globals.c:73
#define free(a)
Definition: header.h:65
int i
Definition: isn.c:73
@ CONNECTION_BAD
Definition: libpq-fe.h:61
@ CONNECTION_OK
Definition: libpq-fe.h:60
@ PGRES_COMMAND_OK
Definition: libpq-fe.h:97
@ PGRES_TUPLES_OK
Definition: libpq-fe.h:100
Assert(fmt[strlen(fmt) - 1] !='\n')
exit(1)
#define pg_log_error(...)
Definition: logging.h:106
#define pg_log_error_detail(...)
Definition: logging.h:109
void pfree(void *pointer)
Definition: mcxt.c:1431
void * palloc(Size size)
Definition: mcxt.c:1201
#define pg_fatal(...)
#define pg_hton64(x)
Definition: pg_bswap.h:122
#define pg_ntoh64(x)
Definition: pg_bswap.h:126
#define DEFAULT_XLOG_SEG_SIZE
static time_t start_time
Definition: pg_ctl.c:94
static bool slot_exists_ok
Definition: pg_receivewal.c:50
static bool two_phase
static const char * plugin
static XLogRecPtr startpos
static char * buf
Definition: pg_test_fsync.c:73
#define PG_DIAG_SQLSTATE
Definition: postgres_ext.h:56
PQExpBuffer createPQExpBuffer(void)
Definition: pqexpbuffer.c:72
void appendPQExpBuffer(PQExpBuffer str, const char *fmt,...)
Definition: pqexpbuffer.c:265
void destroyPQExpBuffer(PQExpBuffer str)
Definition: pqexpbuffer.c:114
void appendPQExpBufferChar(PQExpBuffer str, char ch)
Definition: pqexpbuffer.c:378
void appendPQExpBufferStr(PQExpBuffer str, const char *data)
Definition: pqexpbuffer.c:367
char * simple_prompt(const char *prompt, bool echo)
Definition: sprompt.c:38
void AppendIntegerCommandOption(PQExpBuffer buf, bool use_new_option_syntax, char *option_name, int32 option_value)
Definition: streamutil.c:784
int dbgetpassword
Definition: streamutil.c:52
bool RetrieveWalSegSize(PGconn *conn)
Definition: streamutil.c:275
#define ERRCODE_DUPLICATE_OBJECT
Definition: streamutil.c:32
int WalSegSz
Definition: streamutil.c:34
#define MINIMUM_VERSION_FOR_SHOW_CMD
Definition: streamutil.c:39
char * dbhost
Definition: streamutil.c:48
int64 fe_recvint64(char *buf)
Definition: streamutil.c:862
bool CreateReplicationSlot(PGconn *conn, const char *slot_name, const char *plugin, bool is_temporary, bool is_physical, bool reserve_wal, bool slot_exists_ok, bool two_phase)
Definition: streamutil.c:583
static char * password
Definition: streamutil.c:53
TimestampTz feGetCurrentTimestamp(void)
Definition: streamutil.c:797
char * dbport
Definition: streamutil.c:50
#define MINIMUM_VERSION_FOR_GROUP_ACCESS
Definition: streamutil.c:44
void feTimestampDifference(TimestampTz start_time, TimestampTz stop_time, long *secs, int *microsecs)
Definition: streamutil.c:816
void AppendPlainCommandOption(PQExpBuffer buf, bool use_new_option_syntax, char *option_name)
Definition: streamutil.c:740
void AppendStringCommandOption(PQExpBuffer buf, bool use_new_option_syntax, char *option_name, char *option_value)
Definition: streamutil.c:761
void fe_sendint64(int64 i, char *buf)
Definition: streamutil.c:851
char * connection_string
Definition: streamutil.c:47
PGconn * GetConnection(void)
Definition: streamutil.c:62
bool feTimestampDifferenceExceeds(TimestampTz start_time, TimestampTz stop_time, int msec)
Definition: streamutil.c:838
bool GetSlotInformation(PGconn *conn, const char *slot_name, XLogRecPtr *restart_lsn, TimeLineID *restart_tli)
Definition: streamutil.c:489
const char * progname
Definition: streamutil.c:46
static bool RetrieveDataDirCreatePerm(PGconn *conn)
Definition: streamutil.c:354
bool DropReplicationSlot(PGconn *conn, const char *slot_name)
Definition: streamutil.c:691
char * dbname
Definition: streamutil.c:51
PGconn * conn
Definition: streamutil.c:54
bool RunIdentifySystem(PGconn *conn, char **sysid, TimeLineID *starttli, XLogRecPtr *startpos, char **db_name)
Definition: streamutil.c:408
char * dbuser
Definition: streamutil.c:49
int gettimeofday(struct timeval *tp, void *tzp)
#define IsValidWalSegSize(size)
Definition: xlog_internal.h:96
uint64 XLogRecPtr
Definition: xlogdefs.h:21
#define InvalidXLogRecPtr
Definition: xlogdefs.h:28
uint32 TimeLineID
Definition: xlogdefs.h:59