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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) 1996-2021, 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  * Explicitly discard any dbname value in the connection string;
83  * otherwise, PQconnectdbParams() would interpret that value as being
84  * itself a connection string.
85  */
86  i = 0;
88  {
89  conn_opts = PQconninfoParse(connection_string, &err_msg);
90  if (conn_opts == NULL)
91  {
92  pg_log_error("%s", err_msg);
93  exit(1);
94  }
95 
96  for (conn_opt = conn_opts; conn_opt->keyword != NULL; conn_opt++)
97  {
98  if (conn_opt->val != NULL && conn_opt->val[0] != '\0' &&
99  strcmp(conn_opt->keyword, "dbname") != 0)
100  argcount++;
101  }
102 
103  keywords = pg_malloc0((argcount + 1) * sizeof(*keywords));
104  values = pg_malloc0((argcount + 1) * sizeof(*values));
105 
106  for (conn_opt = conn_opts; conn_opt->keyword != NULL; conn_opt++)
107  {
108  if (conn_opt->val != NULL && conn_opt->val[0] != '\0' &&
109  strcmp(conn_opt->keyword, "dbname") != 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  }
122 
123  keywords[i] = "dbname";
124  values[i] = dbname == NULL ? "replication" : dbname;
125  i++;
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  if (password)
161  free(password);
162  password = simple_prompt("Password: ", false);
163  need_password = false;
164  }
165 
166  /* Use (or reuse, on a subsequent connection) password if we have it */
167  if (password)
168  {
169  keywords[i] = "password";
170  values[i] = password;
171  }
172  else
173  {
174  keywords[i] = NULL;
175  values[i] = NULL;
176  }
177 
178  tmpconn = PQconnectdbParams(keywords, values, true);
179 
180  /*
181  * If there is too little memory even to allocate the PGconn object
182  * and PQconnectdbParams returns NULL, we call exit(1) directly.
183  */
184  if (!tmpconn)
185  {
186  pg_log_error("could not connect to server");
187  exit(1);
188  }
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  if (conn_opts)
208  PQconninfoFree(conn_opts);
209  return NULL;
210  }
211 
212  /* Connection ok! */
213  free(values);
214  free(keywords);
215  if (conn_opts)
216  PQconninfoFree(conn_opts);
217 
218  /*
219  * Set always-secure search path, so malicious users can't get control.
220  * The capacity to run normal SQL queries was added in PostgreSQL 10, so
221  * the search path cannot be changed (by us or attackers) on earlier
222  * versions.
223  */
224  if (dbname != NULL && PQserverVersion(tmpconn) >= 100000)
225  {
226  PGresult *res;
227 
228  res = PQexec(tmpconn, ALWAYS_SECURE_SEARCH_PATH_SQL);
229  if (PQresultStatus(res) != PGRES_TUPLES_OK)
230  {
231  pg_log_error("could not clear search_path: %s",
232  PQerrorMessage(tmpconn));
233  PQclear(res);
234  PQfinish(tmpconn);
235  exit(1);
236  }
237  PQclear(res);
238  }
239 
240  /*
241  * Ensure we have the same value of integer_datetimes (now always "on") as
242  * the server we are connecting to.
243  */
244  tmpparam = PQparameterStatus(tmpconn, "integer_datetimes");
245  if (!tmpparam)
246  {
247  pg_log_error("could not determine server setting for integer_datetimes");
248  PQfinish(tmpconn);
249  exit(1);
250  }
251 
252  if (strcmp(tmpparam, "on") != 0)
253  {
254  pg_log_error("integer_datetimes compile flag does not match server");
255  PQfinish(tmpconn);
256  exit(1);
257  }
258 
259  /*
260  * Retrieve the source data directory mode and use it to construct a umask
261  * for creating directories and files.
262  */
263  if (!RetrieveDataDirCreatePerm(tmpconn))
264  {
265  PQfinish(tmpconn);
266  exit(1);
267  }
268 
269  return tmpconn;
270 }
271 
272 /*
273  * From version 10, explicitly set wal segment size using SHOW wal_segment_size
274  * since ControlFile is not accessible here.
275  */
276 bool
278 {
279  PGresult *res;
280  char xlog_unit[3];
281  int xlog_val,
282  multiplier = 1;
283 
284  /* check connection existence */
285  Assert(conn != NULL);
286 
287  /* for previous versions set the default xlog seg size */
289  {
291  return true;
292  }
293 
294  res = PQexec(conn, "SHOW wal_segment_size");
295  if (PQresultStatus(res) != PGRES_TUPLES_OK)
296  {
297  pg_log_error("could not send replication command \"%s\": %s",
298  "SHOW wal_segment_size", PQerrorMessage(conn));
299 
300  PQclear(res);
301  return false;
302  }
303  if (PQntuples(res) != 1 || PQnfields(res) < 1)
304  {
305  pg_log_error("could not fetch WAL segment size: got %d rows and %d fields, expected %d rows and %d or more fields",
306  PQntuples(res), PQnfields(res), 1, 1);
307 
308  PQclear(res);
309  return false;
310  }
311 
312  /* fetch xlog value and unit from the result */
313  if (sscanf(PQgetvalue(res, 0, 0), "%d%2s", &xlog_val, xlog_unit) != 2)
314  {
315  pg_log_error("WAL segment size could not be parsed");
316  PQclear(res);
317  return false;
318  }
319 
320  PQclear(res);
321 
322  /* set the multiplier based on unit to convert xlog_val to bytes */
323  if (strcmp(xlog_unit, "MB") == 0)
324  multiplier = 1024 * 1024;
325  else if (strcmp(xlog_unit, "GB") == 0)
326  multiplier = 1024 * 1024 * 1024;
327 
328  /* convert and set WalSegSz */
329  WalSegSz = xlog_val * multiplier;
330 
332  {
333  pg_log_error(ngettext("WAL segment size must be a power of two between 1 MB and 1 GB, but the remote server reported a value of %d byte",
334  "WAL segment size must be a power of two between 1 MB and 1 GB, but the remote server reported a value of %d bytes",
335  WalSegSz),
336  WalSegSz);
337  return false;
338  }
339 
340  return true;
341 }
342 
343 /*
344  * RetrieveDataDirCreatePerm
345  *
346  * This function is used to determine the privileges on the server's PG data
347  * directory and, based on that, set what the permissions will be for
348  * directories and files we create.
349  *
350  * PG11 added support for (optionally) group read/execute rights to be set on
351  * the data directory. Prior to PG11, only the owner was allowed to have rights
352  * on the data directory.
353  */
354 static bool
356 {
357  PGresult *res;
359 
360  /* check connection existence */
361  Assert(conn != NULL);
362 
363  /* for previous versions leave the default group access */
365  return true;
366 
367  res = PQexec(conn, "SHOW data_directory_mode");
368  if (PQresultStatus(res) != PGRES_TUPLES_OK)
369  {
370  pg_log_error("could not send replication command \"%s\": %s",
371  "SHOW data_directory_mode", PQerrorMessage(conn));
372 
373  PQclear(res);
374  return false;
375  }
376  if (PQntuples(res) != 1 || PQnfields(res) < 1)
377  {
378  pg_log_error("could not fetch group access flag: got %d rows and %d fields, expected %d rows and %d or more fields",
379  PQntuples(res), PQnfields(res), 1, 1);
380 
381  PQclear(res);
382  return false;
383  }
384 
385  if (sscanf(PQgetvalue(res, 0, 0), "%o", &data_directory_mode) != 1)
386  {
387  pg_log_error("group access flag could not be parsed: %s",
388  PQgetvalue(res, 0, 0));
389 
390  PQclear(res);
391  return false;
392  }
393 
394  SetDataDirectoryCreatePerm(data_directory_mode);
395 
396  PQclear(res);
397  return true;
398 }
399 
400 /*
401  * Run IDENTIFY_SYSTEM through a given connection and give back to caller
402  * some result information if requested:
403  * - System identifier
404  * - Current timeline ID
405  * - Start LSN position
406  * - Database name (NULL in servers prior to 9.4)
407  */
408 bool
409 RunIdentifySystem(PGconn *conn, char **sysid, TimeLineID *starttli,
410  XLogRecPtr *startpos, char **db_name)
411 {
412  PGresult *res;
413  uint32 hi,
414  lo;
415 
416  /* Check connection existence */
417  Assert(conn != NULL);
418 
419  res = PQexec(conn, "IDENTIFY_SYSTEM");
420  if (PQresultStatus(res) != PGRES_TUPLES_OK)
421  {
422  pg_log_error("could not send replication command \"%s\": %s",
423  "IDENTIFY_SYSTEM", PQerrorMessage(conn));
424 
425  PQclear(res);
426  return false;
427  }
428  if (PQntuples(res) != 1 || PQnfields(res) < 3)
429  {
430  pg_log_error("could not identify system: got %d rows and %d fields, expected %d rows and %d or more fields",
431  PQntuples(res), PQnfields(res), 1, 3);
432 
433  PQclear(res);
434  return false;
435  }
436 
437  /* Get system identifier */
438  if (sysid != NULL)
439  *sysid = pg_strdup(PQgetvalue(res, 0, 0));
440 
441  /* Get timeline ID to start streaming from */
442  if (starttli != NULL)
443  *starttli = atoi(PQgetvalue(res, 0, 1));
444 
445  /* Get LSN start position if necessary */
446  if (startpos != NULL)
447  {
448  if (sscanf(PQgetvalue(res, 0, 2), "%X/%X", &hi, &lo) != 2)
449  {
450  pg_log_error("could not parse write-ahead log location \"%s\"",
451  PQgetvalue(res, 0, 2));
452 
453  PQclear(res);
454  return false;
455  }
456  *startpos = ((uint64) hi) << 32 | lo;
457  }
458 
459  /* Get database name, only available in 9.4 and newer versions */
460  if (db_name != NULL)
461  {
462  *db_name = NULL;
463  if (PQserverVersion(conn) >= 90400)
464  {
465  if (PQnfields(res) < 4)
466  {
467  pg_log_error("could not identify system: got %d rows and %d fields, expected %d rows and %d or more fields",
468  PQntuples(res), PQnfields(res), 1, 4);
469 
470  PQclear(res);
471  return false;
472  }
473  if (!PQgetisnull(res, 0, 3))
474  *db_name = pg_strdup(PQgetvalue(res, 0, 3));
475  }
476  }
477 
478  PQclear(res);
479  return true;
480 }
481 
482 /*
483  * Create a replication slot for the given connection. This function
484  * returns true in case of success.
485  */
486 bool
487 CreateReplicationSlot(PGconn *conn, const char *slot_name, const char *plugin,
488  bool is_temporary, bool is_physical, bool reserve_wal,
489  bool slot_exists_ok, bool two_phase)
490 {
491  PQExpBuffer query;
492  PGresult *res;
493  bool use_new_option_syntax = (PQserverVersion(conn) >= 150000);
494 
495  query = createPQExpBuffer();
496 
497  Assert((is_physical && plugin == NULL) ||
498  (!is_physical && plugin != NULL));
499  Assert(!(two_phase && is_physical));
500  Assert(slot_name != NULL);
501 
502  /* Build base portion of query */
503  appendPQExpBuffer(query, "CREATE_REPLICATION_SLOT \"%s\"", slot_name);
504  if (is_temporary)
505  appendPQExpBufferStr(query, " TEMPORARY");
506  if (is_physical)
507  appendPQExpBufferStr(query, " PHYSICAL");
508  else
509  appendPQExpBuffer(query, " LOGICAL \"%s\"", plugin);
510 
511  /* Add any requested options */
512  if (use_new_option_syntax)
513  appendPQExpBufferStr(query, " (");
514  if (is_physical)
515  {
516  if (reserve_wal)
517  AppendPlainCommandOption(query, use_new_option_syntax,
518  "RESERVE_WAL");
519  }
520  else
521  {
522  if (two_phase && PQserverVersion(conn) >= 150000)
523  AppendPlainCommandOption(query, use_new_option_syntax,
524  "TWO_PHASE");
525 
526  if (PQserverVersion(conn) >= 100000)
527  {
528  /* pg_recvlogical doesn't use an exported snapshot, so suppress */
529  if (use_new_option_syntax)
530  AppendStringCommandOption(query, use_new_option_syntax,
531  "SNAPSHOT", "nothing");
532  else
533  AppendPlainCommandOption(query, use_new_option_syntax,
534  "NOEXPORT_SNAPSHOT");
535  }
536  }
537  if (use_new_option_syntax)
538  {
539  /* Suppress option list if it would be empty, otherwise terminate */
540  if (query->data[query->len - 1] == '(')
541  {
542  query->len -= 2;
543  query->data[query->len] = '\0';
544  }
545  else
546  appendPQExpBufferChar(query, ')');
547  }
548 
549  /* Now run the query */
550  res = PQexec(conn, query->data);
551  if (PQresultStatus(res) != PGRES_TUPLES_OK)
552  {
553  const char *sqlstate = PQresultErrorField(res, PG_DIAG_SQLSTATE);
554 
555  if (slot_exists_ok &&
556  sqlstate &&
557  strcmp(sqlstate, ERRCODE_DUPLICATE_OBJECT) == 0)
558  {
559  destroyPQExpBuffer(query);
560  PQclear(res);
561  return true;
562  }
563  else
564  {
565  pg_log_error("could not send replication command \"%s\": %s",
566  query->data, PQerrorMessage(conn));
567 
568  destroyPQExpBuffer(query);
569  PQclear(res);
570  return false;
571  }
572  }
573 
574  if (PQntuples(res) != 1 || PQnfields(res) != 4)
575  {
576  pg_log_error("could not create replication slot \"%s\": got %d rows and %d fields, expected %d rows and %d fields",
577  slot_name,
578  PQntuples(res), PQnfields(res), 1, 4);
579 
580  destroyPQExpBuffer(query);
581  PQclear(res);
582  return false;
583  }
584 
585  destroyPQExpBuffer(query);
586  PQclear(res);
587  return true;
588 }
589 
590 /*
591  * Drop a replication slot for the given connection. This function
592  * returns true in case of success.
593  */
594 bool
595 DropReplicationSlot(PGconn *conn, const char *slot_name)
596 {
597  PQExpBuffer query;
598  PGresult *res;
599 
600  Assert(slot_name != NULL);
601 
602  query = createPQExpBuffer();
603 
604  /* Build query */
605  appendPQExpBuffer(query, "DROP_REPLICATION_SLOT \"%s\"",
606  slot_name);
607  res = PQexec(conn, query->data);
608  if (PQresultStatus(res) != PGRES_COMMAND_OK)
609  {
610  pg_log_error("could not send replication command \"%s\": %s",
611  query->data, PQerrorMessage(conn));
612 
613  destroyPQExpBuffer(query);
614  PQclear(res);
615  return false;
616  }
617 
618  if (PQntuples(res) != 0 || PQnfields(res) != 0)
619  {
620  pg_log_error("could not drop replication slot \"%s\": got %d rows and %d fields, expected %d rows and %d fields",
621  slot_name,
622  PQntuples(res), PQnfields(res), 0, 0);
623 
624  destroyPQExpBuffer(query);
625  PQclear(res);
626  return false;
627  }
628 
629  destroyPQExpBuffer(query);
630  PQclear(res);
631  return true;
632 }
633 
634 /*
635  * Append a "plain" option - one with no value - to a server command that
636  * is being constructed.
637  *
638  * In the old syntax, all options were parser keywords, so you could just
639  * write things like SOME_COMMAND OPTION1 OPTION2 'opt2value' OPTION3 42. The
640  * new syntax uses a comma-separated list surrounded by parentheses, so the
641  * equivalent is SOME_COMMAND (OPTION1, OPTION2 'optvalue', OPTION3 42).
642  */
643 void
644 AppendPlainCommandOption(PQExpBuffer buf, bool use_new_option_syntax,
645  char *option_name)
646 {
647  if (buf->len > 0 && buf->data[buf->len - 1] != '(')
648  {
649  if (use_new_option_syntax)
650  appendPQExpBufferStr(buf, ", ");
651  else
652  appendPQExpBufferChar(buf, ' ');
653  }
654 
655  appendPQExpBuffer(buf, " %s", option_name);
656 }
657 
658 /*
659  * Append an option with an associated string value to a server command that
660  * is being constructed.
661  *
662  * See comments for AppendPlainCommandOption, above.
663  */
664 void
665 AppendStringCommandOption(PQExpBuffer buf, bool use_new_option_syntax,
666  char *option_name, char *option_value)
667 {
668  AppendPlainCommandOption(buf, use_new_option_syntax, option_name);
669 
670  if (option_value != NULL)
671  {
672  size_t length = strlen(option_value);
673  char *escaped_value = palloc(1 + 2 * length);
674 
675  PQescapeStringConn(conn, escaped_value, option_value, length, NULL);
676  appendPQExpBuffer(buf, " '%s'", escaped_value);
677  pfree(escaped_value);
678  }
679 }
680 
681 /*
682  * Append an option with an associated integer value to a server command
683  * is being constructed.
684  *
685  * See comments for AppendPlainCommandOption, above.
686  */
687 void
688 AppendIntegerCommandOption(PQExpBuffer buf, bool use_new_option_syntax,
689  char *option_name, int32 option_value)
690 {
691  AppendPlainCommandOption(buf, use_new_option_syntax, option_name);
692 
693  appendPQExpBuffer(buf, " %d", option_value);
694 }
695 
696 /*
697  * Frontend version of GetCurrentTimestamp(), since we are not linked with
698  * backend code.
699  */
702 {
703  TimestampTz result;
704  struct timeval tp;
705 
706  gettimeofday(&tp, NULL);
707 
708  result = (TimestampTz) tp.tv_sec -
710  result = (result * USECS_PER_SEC) + tp.tv_usec;
711 
712  return result;
713 }
714 
715 /*
716  * Frontend version of TimestampDifference(), since we are not linked with
717  * backend code.
718  */
719 void
721  long *secs, int *microsecs)
722 {
723  TimestampTz diff = stop_time - start_time;
724 
725  if (diff <= 0)
726  {
727  *secs = 0;
728  *microsecs = 0;
729  }
730  else
731  {
732  *secs = (long) (diff / USECS_PER_SEC);
733  *microsecs = (int) (diff % USECS_PER_SEC);
734  }
735 }
736 
737 /*
738  * Frontend version of TimestampDifferenceExceeds(), since we are not
739  * linked with backend code.
740  */
741 bool
743  TimestampTz stop_time,
744  int msec)
745 {
746  TimestampTz diff = stop_time - start_time;
747 
748  return (diff >= msec * INT64CONST(1000));
749 }
750 
751 /*
752  * Converts an int64 to network byte order.
753  */
754 void
755 fe_sendint64(int64 i, char *buf)
756 {
757  uint64 n64 = pg_hton64(i);
758 
759  memcpy(buf, &n64, sizeof(n64));
760 }
761 
762 /*
763  * Converts an int64 from network byte order to native format.
764  */
765 int64
767 {
768  uint64 n64;
769 
770  memcpy(&n64, buf, sizeof(n64));
771 
772  return pg_ntoh64(n64);
773 }
#define IsValidWalSegSize(size)
Definition: xlog_internal.h:96
static const char * plugin
int PQnfields(const PGresult *res)
Definition: fe-exec.c:3256
char * PQerrorMessage(const PGconn *conn)
Definition: fe-connect.c:6744
int gettimeofday(struct timeval *tp, struct timezone *tzp)
Definition: gettimeofday.c:104
uint32 TimeLineID
Definition: xlogdefs.h:59
TimestampTz feGetCurrentTimestamp(void)
Definition: streamutil.c:701
char * PQgetvalue(const PGresult *res, int tup_num, int field_num)
Definition: fe-exec.c:3642
const char * PQparameterStatus(const PGconn *conn, const char *paramName)
Definition: fe-connect.c:6709
#define pg_hton64(x)
Definition: pg_bswap.h:122
#define USECS_PER_SEC
Definition: timestamp.h:94
int64 TimestampTz
Definition: timestamp.h:39
#define pg_log_error(...)
Definition: logging.h:80
void appendPQExpBufferStr(PQExpBuffer str, const char *data)
Definition: pqexpbuffer.c:369
#define DEFAULT_XLOG_SEG_SIZE
bool RunIdentifySystem(PGconn *conn, char **sysid, TimeLineID *starttli, XLogRecPtr *startpos, char **db_name)
Definition: streamutil.c:409
void AppendStringCommandOption(PQExpBuffer buf, bool use_new_option_syntax, char *option_name, char *option_value)
Definition: streamutil.c:665
void PQfinish(PGconn *conn)
Definition: fe-connect.c:4231
char * simple_prompt(const char *prompt, bool echo)
Definition: sprompt.c:38
int PQserverVersion(const PGconn *conn)
Definition: fe-connect.c:6734
int PQntuples(const PGresult *res)
Definition: fe-exec.c:3248
#define PG_DIAG_SQLSTATE
Definition: postgres_ext.h:57
bool feTimestampDifferenceExceeds(TimestampTz start_time, TimestampTz stop_time, int msec)
Definition: streamutil.c:742
ExecStatusType PQresultStatus(const PGresult *res)
Definition: fe-exec.c:3178
PGconn * PQconnectdbParams(const char *const *keywords, const char *const *values, int expand_dbname)
Definition: fe-connect.c:657
static time_t start_time
Definition: pg_ctl.c:99
signed int int32
Definition: c.h:429
#define MINIMUM_VERSION_FOR_SHOW_CMD
Definition: streamutil.c:39
static bool slot_exists_ok
Definition: pg_receivewal.c:43
void destroyPQExpBuffer(PQExpBuffer str)
Definition: pqexpbuffer.c:116
PQconninfoOption * PQconninfoParse(const char *conninfo, char **errmsg)
Definition: fe-connect.c:5337
void pfree(void *pointer)
Definition: mcxt.c:1169
char * connection_string
Definition: streamutil.c:47
#define SECS_PER_DAY
Definition: timestamp.h:86
bool RetrieveWalSegSize(PGconn *conn)
Definition: streamutil.c:277
void * pg_malloc0(size_t size)
Definition: fe_memutils.c:53
PGconn * conn
Definition: streamutil.c:54
void appendPQExpBuffer(PQExpBuffer str, const char *fmt,...)
Definition: pqexpbuffer.c:267
void feTimestampDifference(TimestampTz start_time, TimestampTz stop_time, long *secs, int *microsecs)
Definition: streamutil.c:720
static char * buf
Definition: pg_test_fsync.c:68
void PQconninfoFree(PQconninfoOption *connOptions)
Definition: fe-connect.c:6572
char * pg_strdup(const char *in)
Definition: fe_memutils.c:85
size_t PQescapeStringConn(PGconn *conn, char *to, const char *from, size_t length, int *error)
Definition: fe-exec.c:3910
unsigned int uint32
Definition: c.h:441
static char * password
Definition: streamutil.c:53
int dbgetpassword
Definition: streamutil.c:52
#define ngettext(s, p, n)
Definition: c.h:1182
PQExpBuffer createPQExpBuffer(void)
Definition: pqexpbuffer.c:74
void appendPQExpBufferChar(PQExpBuffer str, char ch)
Definition: pqexpbuffer.c:380
static bool two_phase
char * dbport
Definition: streamutil.c:50
void PQclear(PGresult *res)
Definition: fe-exec.c:694
#define free(a)
Definition: header.h:65
void AppendIntegerCommandOption(PQExpBuffer buf, bool use_new_option_syntax, char *option_name, int32 option_value)
Definition: streamutil.c:688
const char * progname
Definition: streamutil.c:46
char * PQresultErrorField(const PGresult *res, int fieldcode)
Definition: fe-exec.c:3233
uint64 XLogRecPtr
Definition: xlogdefs.h:21
#define Assert(condition)
Definition: c.h:804
char * dbhost
Definition: streamutil.c:48
char * dbname
Definition: streamutil.c:51
static XLogRecPtr startpos
void AppendPlainCommandOption(PQExpBuffer buf, bool use_new_option_syntax, char *option_name)
Definition: streamutil.c:644
#define ALWAYS_SECURE_SEARCH_PATH_SQL
Definition: connect.h:25
uint32 WalSegSz
Definition: streamutil.c:34
static Datum values[MAXATTR]
Definition: bootstrap.c:156
#define MINIMUM_VERSION_FOR_GROUP_ACCESS
Definition: streamutil.c:44
int PQconnectionNeedsPassword(const PGconn *conn)
Definition: fe-connect.c:6795
void * palloc(Size size)
Definition: mcxt.c:1062
int64 fe_recvint64(char *buf)
Definition: streamutil.c:766
char * dbuser
Definition: streamutil.c:49
int data_directory_mode
Definition: globals.c:71
void SetDataDirectoryCreatePerm(int dataDirMode)
Definition: file_perm.c:34
int i
PGresult * PQexec(PGconn *conn, const char *query)
Definition: fe-exec.c:2193
bool DropReplicationSlot(PGconn *conn, const char *slot_name)
Definition: streamutil.c:595
#define UNIX_EPOCH_JDATE
Definition: timestamp.h:162
#define POSTGRES_EPOCH_JDATE
Definition: timestamp.h:163
static bool RetrieveDataDirCreatePerm(PGconn *conn)
Definition: streamutil.c:355
void fe_sendint64(int64 i, char *buf)
Definition: streamutil.c:755
PGconn * GetConnection(void)
Definition: streamutil.c:62
int PQgetisnull(const PGresult *res, int tup_num, int field_num)
Definition: fe-exec.c:3667
ConnStatusType PQstatus(const PGconn *conn)
Definition: fe-connect.c:6691
#define ERRCODE_DUPLICATE_OBJECT
Definition: streamutil.c:32
#define pg_ntoh64(x)
Definition: pg_bswap.h:126
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:487