Age Owner Branch data TLA Line data Source code
1 : : /*-------------------------------------------------------------------------
2 : : *
3 : : * postinit.c
4 : : * postgres initialization utilities
5 : : *
6 : : * Portions Copyright (c) 1996-2026, PostgreSQL Global Development Group
7 : : * Portions Copyright (c) 1994, Regents of the University of California
8 : : *
9 : : *
10 : : * IDENTIFICATION
11 : : * src/backend/utils/init/postinit.c
12 : : *
13 : : *
14 : : *-------------------------------------------------------------------------
15 : : */
16 : : #include "postgres.h"
17 : :
18 : : #include <ctype.h>
19 : : #include <fcntl.h>
20 : : #include <unistd.h>
21 : :
22 : : #include "access/genam.h"
23 : : #include "access/heapam.h"
24 : : #include "access/htup_details.h"
25 : : #include "access/session.h"
26 : : #include "access/tableam.h"
27 : : #include "access/xact.h"
28 : : #include "access/xlog.h"
29 : : #include "access/xloginsert.h"
30 : : #include "catalog/namespace.h"
31 : : #include "catalog/pg_authid.h"
32 : : #include "catalog/pg_collation.h"
33 : : #include "catalog/pg_database.h"
34 : : #include "catalog/pg_db_role_setting.h"
35 : : #include "catalog/pg_tablespace.h"
36 : : #include "libpq/auth.h"
37 : : #include "libpq/libpq-be.h"
38 : : #include "mb/pg_wchar.h"
39 : : #include "miscadmin.h"
40 : : #include "pgstat.h"
41 : : #include "port/pg_bitutils.h"
42 : : #include "postmaster/autovacuum.h"
43 : : #include "postmaster/postmaster.h"
44 : : #include "replication/slot.h"
45 : : #include "replication/slotsync.h"
46 : : #include "replication/walsender.h"
47 : : #include "storage/aio_subsys.h"
48 : : #include "storage/bufmgr.h"
49 : : #include "storage/fd.h"
50 : : #include "storage/ipc.h"
51 : : #include "storage/lmgr.h"
52 : : #include "storage/proc.h"
53 : : #include "storage/procarray.h"
54 : : #include "storage/procnumber.h"
55 : : #include "storage/procsignal.h"
56 : : #include "storage/sinvaladt.h"
57 : : #include "storage/smgr.h"
58 : : #include "storage/sync.h"
59 : : #include "tcop/backend_startup.h"
60 : : #include "tcop/tcopprot.h"
61 : : #include "utils/acl.h"
62 : : #include "utils/builtins.h"
63 : : #include "utils/fmgroids.h"
64 : : #include "utils/guc_hooks.h"
65 : : #include "utils/injection_point.h"
66 : : #include "utils/memutils.h"
67 : : #include "utils/pg_locale.h"
68 : : #include "utils/portal.h"
69 : : #include "utils/ps_status.h"
70 : : #include "utils/snapmgr.h"
71 : : #include "utils/syscache.h"
72 : : #include "utils/timeout.h"
73 : :
74 : : /* has this backend called EmitConnectionWarnings()? */
75 : : static bool ConnectionWarningsEmitted;
76 : :
77 : : /* content of warnings to send via EmitConnectionWarnings() */
78 : : static List *ConnectionWarningMessages;
79 : : static List *ConnectionWarningDetails;
80 : :
81 : : static HeapTuple GetDatabaseTuple(const char *dbname);
82 : : static HeapTuple GetDatabaseTupleByOid(Oid dboid);
83 : : static void PerformAuthentication(Port *port);
84 : : static void CheckMyDatabase(const char *name, bool am_superuser, bool override_allow_connections);
85 : : static void ShutdownPostgres(int code, Datum arg);
86 : : static void StatementTimeoutHandler(void);
87 : : static void LockTimeoutHandler(void);
88 : : static void IdleInTransactionSessionTimeoutHandler(void);
89 : : static void TransactionTimeoutHandler(void);
90 : : static void IdleSessionTimeoutHandler(void);
91 : : static void IdleStatsUpdateTimeoutHandler(void);
92 : : static void ClientCheckTimeoutHandler(void);
93 : : static bool ThereIsAtLeastOneRole(void);
94 : : static void process_startup_options(Port *port, bool am_superuser);
95 : : static void process_settings(Oid databaseid, Oid roleid);
96 : : static void EmitConnectionWarnings(void);
97 : :
98 : :
99 : : /*** InitPostgres support ***/
100 : :
101 : :
102 : : /*
103 : : * GetDatabaseTuple -- fetch the pg_database row for a database
104 : : *
105 : : * This is used during backend startup when we don't yet have any access to
106 : : * system catalogs in general. In the worst case, we can seqscan pg_database
107 : : * using nothing but the hard-wired descriptor that relcache.c creates for
108 : : * pg_database. In more typical cases, relcache.c was able to load
109 : : * descriptors for both pg_database and its indexes from the shared relcache
110 : : * cache file, and so we can do an indexscan. criticalSharedRelcachesBuilt
111 : : * tells whether we got the cached descriptors.
112 : : */
113 : : static HeapTuple
6135 tgl@sss.pgh.pa.us 114 :CBC 14302 : GetDatabaseTuple(const char *dbname)
115 : : {
116 : : HeapTuple tuple;
117 : : Relation relation;
118 : : SysScanDesc scan;
119 : : ScanKeyData key[1];
120 : :
121 : : /*
122 : : * form a scan key
123 : : */
124 : 14302 : ScanKeyInit(&key[0],
125 : : Anum_pg_database_datname,
126 : : BTEqualStrategyNumber, F_NAMEEQ,
127 : : CStringGetDatum(dbname));
128 : :
129 : : /*
130 : : * Open pg_database and fetch a tuple. Force heap scan if we haven't yet
131 : : * built the critical shared relcache entries (i.e., we're starting up
132 : : * without a shared relcache cache file).
133 : : */
2686 andres@anarazel.de 134 : 14302 : relation = table_open(DatabaseRelationId, AccessShareLock);
6135 tgl@sss.pgh.pa.us 135 : 14302 : scan = systable_beginscan(relation, DatabaseNameIndexId,
136 : : criticalSharedRelcachesBuilt,
137 : : NULL,
138 : : 1, key);
139 : :
140 : 14302 : tuple = systable_getnext(scan);
141 : :
142 : : /* Must copy tuple before releasing buffer */
143 [ + + ]: 14302 : if (HeapTupleIsValid(tuple))
144 : 14296 : tuple = heap_copytuple(tuple);
145 : :
146 : : /* all done */
147 : 14302 : systable_endscan(scan);
2686 andres@anarazel.de 148 : 14302 : table_close(relation, AccessShareLock);
149 : :
6135 tgl@sss.pgh.pa.us 150 : 14302 : return tuple;
151 : : }
152 : :
153 : : /*
154 : : * GetDatabaseTupleByOid -- as above, but search by database OID
155 : : */
156 : : static HeapTuple
157 : 16992 : GetDatabaseTupleByOid(Oid dboid)
158 : : {
159 : : HeapTuple tuple;
160 : : Relation relation;
161 : : SysScanDesc scan;
162 : : ScanKeyData key[1];
163 : :
164 : : /*
165 : : * form a scan key
166 : : */
167 : 16992 : ScanKeyInit(&key[0],
168 : : Anum_pg_database_oid,
169 : : BTEqualStrategyNumber, F_OIDEQ,
170 : : ObjectIdGetDatum(dboid));
171 : :
172 : : /*
173 : : * Open pg_database and fetch a tuple. Force heap scan if we haven't yet
174 : : * built the critical shared relcache entries (i.e., we're starting up
175 : : * without a shared relcache cache file).
176 : : */
2686 andres@anarazel.de 177 : 16992 : relation = table_open(DatabaseRelationId, AccessShareLock);
6135 tgl@sss.pgh.pa.us 178 : 16992 : scan = systable_beginscan(relation, DatabaseOidIndexId,
179 : : criticalSharedRelcachesBuilt,
180 : : NULL,
181 : : 1, key);
182 : :
183 : 16992 : tuple = systable_getnext(scan);
184 : :
185 : : /* Must copy tuple before releasing buffer */
186 [ + - ]: 16992 : if (HeapTupleIsValid(tuple))
187 : 16992 : tuple = heap_copytuple(tuple);
188 : :
189 : : /* all done */
190 : 16992 : systable_endscan(scan);
2686 andres@anarazel.de 191 : 16992 : table_close(relation, AccessShareLock);
192 : :
6135 tgl@sss.pgh.pa.us 193 : 16992 : return tuple;
194 : : }
195 : :
196 : :
197 : : /*
198 : : * PerformAuthentication -- authenticate a remote client
199 : : *
200 : : * returns: nothing. Will not return at all if there's any failure.
201 : : */
202 : : static void
6118 203 : 14946 : PerformAuthentication(Port *port)
204 : : {
205 : : /* This should be set already, but let's make sure */
206 : 14946 : ClientAuthInProgress = true; /* limit visibility of log messages */
207 : :
208 : : /*
209 : : * In EXEC_BACKEND case, we didn't inherit the contents of pg_hba.conf
210 : : * etcetera from the postmaster, and have to load them ourselves.
211 : : *
212 : : * FIXME: [fork/exec] Ugh. Is there a way around this overhead?
213 : : */
214 : : #ifdef EXEC_BACKEND
215 : :
216 : : /*
217 : : * load_hba() and load_ident() want to work within the PostmasterContext,
218 : : * so create that if it doesn't exist (which it won't). We'll delete it
219 : : * again later, in PostgresMain.
220 : : */
221 : : if (PostmasterContext == NULL)
222 : : PostmasterContext = AllocSetContextCreate(TopMemoryContext,
223 : : "Postmaster",
224 : : ALLOCSET_DEFAULT_SIZES);
225 : :
226 : : if (!load_hba())
227 : : {
228 : : /*
229 : : * It makes no sense to continue if we fail to load the HBA file,
230 : : * since there is no way to connect to the database in this case.
231 : : */
232 : : ereport(FATAL,
233 : : /* translator: %s is a configuration file */
234 : : (errmsg("could not load %s", HbaFileName)));
235 : : }
236 : :
237 : : if (!load_ident())
238 : : {
239 : : /*
240 : : * It is ok to continue if we fail to load the IDENT file, although it
241 : : * means that you cannot log in using any of the authentication
242 : : * methods that need a user name mapping. load_ident() already logged
243 : : * the details of error to the log.
244 : : */
245 : : }
246 : : #endif
247 : :
248 : : /* Capture authentication start time for logging */
444 melanieplageman@gmai 249 : 14946 : conn_timing.auth_start = GetCurrentTimestamp();
250 : :
251 : : /*
252 : : * Set up a timeout in case a buggy or malicious client fails to respond
253 : : * during authentication. Since we're inside a transaction and might do
254 : : * database access, we have to use the statement_timeout infrastructure.
255 : : */
5066 alvherre@alvh.no-ip. 256 : 14946 : enable_timeout_after(STATEMENT_TIMEOUT, AuthenticationTimeout * 1000);
257 : :
258 : : /*
259 : : * Now perform authentication exchange.
260 : : */
2271 peter@eisentraut.org 261 : 14946 : set_ps_display("authentication");
6118 tgl@sss.pgh.pa.us 262 : 14946 : ClientAuthentication(port); /* might not return, if failure */
263 : :
264 : : /*
265 : : * Done with authentication. Disable the timeout, and log if needed.
266 : : */
5066 alvherre@alvh.no-ip. 267 : 14739 : disable_timeout(STATEMENT_TIMEOUT, false);
268 : :
269 : : /* Capture authentication end time for logging */
444 melanieplageman@gmai 270 : 14739 : conn_timing.auth_end = GetCurrentTimestamp();
271 : :
272 [ + + ]: 14739 : if (log_connections & LOG_CONNECTION_AUTHORIZATION)
273 : : {
274 : : StringInfoData logmsg;
275 : :
2005 sfrost@snowman.net 276 : 408 : initStringInfo(&logmsg);
5611 magnus@hagander.net 277 [ - + ]: 408 : if (am_walsender)
2005 sfrost@snowman.net 278 :UBC 0 : appendStringInfo(&logmsg, _("replication connection authorized: user=%s"),
279 : : port->user_name);
280 : : else
2005 sfrost@snowman.net 281 :CBC 408 : appendStringInfo(&logmsg, _("connection authorized: user=%s"),
282 : : port->user_name);
283 [ + - ]: 408 : if (!am_walsender)
284 : 408 : appendStringInfo(&logmsg, _(" database=%s"), port->database_name);
285 : :
286 [ + + ]: 408 : if (port->application_name != NULL)
287 : 405 : appendStringInfo(&logmsg, _(" application_name=%s"),
288 : : port->application_name);
289 : :
290 : : #ifdef USE_SSL
291 [ + + ]: 408 : if (port->ssl_in_use)
1908 michael@paquier.xyz 292 : 128 : appendStringInfo(&logmsg, _(" SSL enabled (protocol=%s, cipher=%s, bits=%d)"),
293 : : be_tls_get_version(port),
294 : : be_tls_get_cipher(port),
295 : : be_tls_get_cipher_bits(port));
296 : : #endif
297 : : #ifdef ENABLE_GSS
1979 tgl@sss.pgh.pa.us 298 [ + + ]: 408 : if (port->gss)
299 : : {
300 : 90 : const char *princ = be_gssapi_get_princ(port);
301 : :
302 [ + + ]: 90 : if (princ)
303 [ + + + + : 117 : appendStringInfo(&logmsg,
+ - ]
1105 304 : 39 : _(" GSS (authenticated=%s, encrypted=%s, delegated_credentials=%s, principal=%s)"),
1979 305 : 78 : be_gssapi_get_auth(port) ? _("yes") : _("no"),
306 : 78 : be_gssapi_get_enc(port) ? _("yes") : _("no"),
1106 bruce@momjian.us 307 : 78 : be_gssapi_get_delegation(port) ? _("yes") : _("no"),
308 : : princ);
309 : : else
1979 tgl@sss.pgh.pa.us 310 [ - + + - : 153 : appendStringInfo(&logmsg,
- + ]
1105 311 : 51 : _(" GSS (authenticated=%s, encrypted=%s, delegated_credentials=%s)"),
1979 312 : 102 : be_gssapi_get_auth(port) ? _("yes") : _("no"),
1143 sfrost@snowman.net 313 : 102 : be_gssapi_get_enc(port) ? _("yes") : _("no"),
1106 bruce@momjian.us 314 : 102 : be_gssapi_get_delegation(port) ? _("yes") : _("no"));
315 : : }
316 : : #endif
317 : :
2005 sfrost@snowman.net 318 [ + - ]: 408 : ereport(LOG, errmsg_internal("%s", logmsg.data));
319 : 408 : pfree(logmsg.data);
320 : : }
321 : :
2271 peter@eisentraut.org 322 : 14739 : set_ps_display("startup");
323 : :
3265 tgl@sss.pgh.pa.us 324 : 14739 : ClientAuthInProgress = false; /* client_min_messages is active now */
6118 325 : 14739 : }
326 : :
327 : :
328 : : /*
329 : : * CheckMyDatabase -- fetch information from the pg_database entry for our DB
330 : : */
331 : : static void
2977 magnus@hagander.net 332 : 16984 : CheckMyDatabase(const char *name, bool am_superuser, bool override_allow_connections)
333 : : {
334 : : HeapTuple tup;
335 : : Form_pg_database dbform;
336 : : Datum datum;
337 : : bool isnull;
338 : : char *collate;
339 : : char *ctype;
340 : :
341 : : /* Fetch our pg_database row normally, via syscache */
5949 rhaas@postgresql.org 342 : 16984 : tup = SearchSysCache1(DATABASEOID, ObjectIdGetDatum(MyDatabaseId));
7331 tgl@sss.pgh.pa.us 343 [ - + ]: 16984 : if (!HeapTupleIsValid(tup))
7331 tgl@sss.pgh.pa.us 344 [ # # ]:UBC 0 : elog(ERROR, "cache lookup failed for database %u", MyDatabaseId);
7331 tgl@sss.pgh.pa.us 345 :CBC 16984 : dbform = (Form_pg_database) GETSTRUCT(tup);
346 : :
347 : : /* This recheck is strictly paranoia */
348 [ - + ]: 16984 : if (strcmp(name, NameStr(dbform->datname)) != 0)
8345 tgl@sss.pgh.pa.us 349 [ # # ]:UBC 0 : ereport(FATAL,
350 : : (errcode(ERRCODE_UNDEFINED_DATABASE),
351 : : errmsg("database \"%s\" has disappeared from pg_database",
352 : : name),
353 : : errdetail("Database OID %u now seems to belong to \"%s\".",
354 : : MyDatabaseId, NameStr(dbform->datname))));
355 : :
356 : : /*
357 : : * Check permissions to connect to the database.
358 : : *
359 : : * These checks are not enforced when in standalone mode, so that there is
360 : : * a way to recover from disabling all access to all databases, for
361 : : * example "UPDATE pg_database SET datallowconn = false;".
362 : : */
518 tgl@sss.pgh.pa.us 363 [ + + ]:CBC 16984 : if (IsUnderPostmaster)
364 : : {
365 : : /*
366 : : * Check that the database is currently allowing connections.
367 : : * (Background processes can override this test and the next one by
368 : : * setting override_allow_connections.)
369 : : */
2977 magnus@hagander.net 370 [ + + + + ]: 16908 : if (!dbform->datallowconn && !override_allow_connections)
7608 tgl@sss.pgh.pa.us 371 [ + - ]: 1 : ereport(FATAL,
372 : : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
373 : : errmsg("database \"%s\" is not currently accepting connections",
374 : : name)));
375 : :
376 : : /*
377 : : * Check privilege to connect to the database. (The am_superuser test
378 : : * is redundant, but since we have the flag, might as well check it
379 : : * and save a few cycles.)
380 : : */
518 381 [ + + + + : 17355 : if (!am_superuser && !override_allow_connections &&
- + ]
1294 peter@eisentraut.org 382 : 448 : object_aclcheck(DatabaseRelationId, MyDatabaseId, GetUserId(),
383 : : ACL_CONNECT) != ACLCHECK_OK)
7335 tgl@sss.pgh.pa.us 384 [ # # ]:UBC 0 : ereport(FATAL,
385 : : (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
386 : : errmsg("permission denied for database \"%s\"", name),
387 : : errdetail("User does not have CONNECT privilege.")));
388 : :
389 : : /*
390 : : * Check connection limit for this database. We enforce the limit
391 : : * only for regular backends, since other process types have their own
392 : : * PGPROC pools.
393 : : *
394 : : * There is a race condition here --- we create our PGPROC before
395 : : * checking for other PGPROCs. If two backends did this at about the
396 : : * same time, they might both think they were over the limit, while
397 : : * ideally one should succeed and one fail. Getting that to work
398 : : * exactly seems more trouble than it is worth, however; instead we
399 : : * just document that the connection limit is approximate.
400 : : */
7608 tgl@sss.pgh.pa.us 401 [ - + ]:CBC 16907 : if (dbform->datconnlimit >= 0 &&
518 tgl@sss.pgh.pa.us 402 [ # # ]:UBC 0 : AmRegularBackendProcess() &&
7335 403 [ # # ]: 0 : !am_superuser &&
3405 andrew@dunslane.net 404 [ # # ]: 0 : CountDBConnections(MyDatabaseId) > dbform->datconnlimit)
7608 tgl@sss.pgh.pa.us 405 [ # # ]: 0 : ereport(FATAL,
406 : : (errcode(ERRCODE_TOO_MANY_CONNECTIONS),
407 : : errmsg("too many connections for database \"%s\"",
408 : : name)));
409 : : }
410 : :
411 : : /*
412 : : * OK, we're golden. Next to-do item is to save the encoding info out of
413 : : * the pg_database tuple.
414 : : */
9328 tgl@sss.pgh.pa.us 415 :CBC 16983 : SetDatabaseEncoding(dbform->encoding);
416 : : /* Record it as a GUC internal option, too */
8436 417 : 16983 : SetConfigOption("server_encoding", GetDatabaseEncodingName(),
418 : : PGC_INTERNAL, PGC_S_DYNAMIC_DEFAULT);
419 : : /* If we have no other source of client_encoding, use server encoding */
8779 420 : 16983 : SetConfigOption("client_encoding", GetDatabaseEncodingName(),
421 : : PGC_BACKEND, PGC_S_DYNAMIC_DEFAULT);
422 : :
423 : : /* assign locale variables */
1162 dgustafsson@postgres 424 : 16983 : datum = SysCacheGetAttrNotNull(DATABASEOID, tup, Anum_pg_database_datcollate);
1584 peter@eisentraut.org 425 : 16983 : collate = TextDatumGetCString(datum);
1162 dgustafsson@postgres 426 : 16983 : datum = SysCacheGetAttrNotNull(DATABASEOID, tup, Anum_pg_database_datctype);
1584 peter@eisentraut.org 427 : 16983 : ctype = TextDatumGetCString(datum);
428 : :
429 : : /*
430 : : * Historically, we set LC_COLLATE from datcollate, as well. That's no
431 : : * longer necessary because all collation behavior is handled through
432 : : * pg_locale_t.
433 : : */
434 : :
6170 heikki.linnakangas@i 435 [ - + ]: 16983 : if (pg_perm_setlocale(LC_CTYPE, ctype) == NULL)
6197 bruce@momjian.us 436 [ # # ]:UBC 0 : ereport(FATAL,
437 : : (errmsg("database locale is incompatible with operating system"),
438 : : errdetail("The database was initialized with LC_CTYPE \"%s\", "
439 : : " which is not recognized by setlocale().", ctype),
440 : : errhint("Recreate the database with another locale or install the missing locale.")));
441 : :
671 jdavis@postgresql.or 442 :CBC 16983 : init_database_collation();
443 : :
444 : : /*
445 : : * Check collation version. See similar code in
446 : : * pg_newlocale_from_collation(). Note that here we warn instead of error
447 : : * in any case, so that we don't prevent connecting.
448 : : */
1566 peter@eisentraut.org 449 : 16981 : datum = SysCacheGetAttr(DATABASEOID, tup, Anum_pg_database_datcollversion,
450 : : &isnull);
451 [ + + ]: 16981 : if (!isnull)
452 : : {
453 : : char *actual_versionstr;
454 : : char *collversionstr;
455 : : char *locale;
456 : :
457 : 928 : collversionstr = TextDatumGetCString(datum);
458 : :
808 jdavis@postgresql.or 459 [ - + ]: 928 : if (dbform->datlocprovider == COLLPROVIDER_LIBC)
808 jdavis@postgresql.or 460 :UBC 0 : locale = collate;
461 : : else
462 : : {
671 jdavis@postgresql.or 463 :CBC 928 : datum = SysCacheGetAttrNotNull(DATABASEOID, tup, Anum_pg_database_datlocale);
464 : 928 : locale = TextDatumGetCString(datum);
465 : : }
466 : :
808 467 : 928 : actual_versionstr = get_collation_actual_version(dbform->datlocprovider, locale);
1566 peter@eisentraut.org 468 [ - + ]: 928 : if (!actual_versionstr)
469 : : /* should not happen */
1361 alvherre@alvh.no-ip. 470 [ # # ]:UBC 0 : elog(WARNING,
471 : : "database \"%s\" has no actual collation version, but a version was recorded",
472 : : name);
1559 peter@eisentraut.org 473 [ - + ]:CBC 928 : else if (strcmp(actual_versionstr, collversionstr) != 0)
1566 peter@eisentraut.org 474 [ # # ]:UBC 0 : ereport(WARNING,
475 : : (errmsg("database \"%s\" has a collation version mismatch",
476 : : name),
477 : : errdetail("The database was created using collation version %s, "
478 : : "but the operating system provides version %s.",
479 : : collversionstr, actual_versionstr),
480 : : errhint("Rebuild all objects in this database that use the default collation and run "
481 : : "ALTER DATABASE %s REFRESH COLLATION VERSION, "
482 : : "or build PostgreSQL with the right library version.",
483 : : quote_identifier(name))));
484 : : }
485 : :
7331 tgl@sss.pgh.pa.us 486 :CBC 16981 : ReleaseSysCache(tup);
9745 487 : 16981 : }
488 : :
489 : :
490 : : /*
491 : : * pg_split_opts -- split a string of options and append it to an argv array
492 : : *
493 : : * The caller is responsible for ensuring the argv array is large enough. The
494 : : * maximum possible number of arguments added by this routine is
495 : : * (strlen(optstr) + 1) / 2.
496 : : *
497 : : * Because some option values can contain spaces we allow escaping using
498 : : * backslashes, with \\ representing a literal backslash.
499 : : */
500 : : void
3988 501 : 4219 : pg_split_opts(char **argv, int *argcp, const char *optstr)
502 : : {
503 : : StringInfoData s;
504 : :
4293 andres@anarazel.de 505 : 4219 : initStringInfo(&s);
506 : :
6118 tgl@sss.pgh.pa.us 507 [ + + ]: 15454 : while (*optstr)
508 : : {
4277 509 : 11235 : bool last_was_escape = false;
510 : :
4293 andres@anarazel.de 511 : 11235 : resetStringInfo(&s);
512 : :
513 : : /* skip over leading space */
6118 tgl@sss.pgh.pa.us 514 [ + + ]: 21470 : while (isspace((unsigned char) *optstr))
515 : 10235 : optstr++;
516 : :
517 [ - + ]: 11235 : if (*optstr == '\0')
6118 tgl@sss.pgh.pa.us 518 :UBC 0 : break;
519 : :
520 : : /*
521 : : * Parse a single option, stopping at the first space, unless it's
522 : : * escaped.
523 : : */
4293 andres@anarazel.de 524 [ + + ]:CBC 171703 : while (*optstr)
525 : : {
4289 tgl@sss.pgh.pa.us 526 [ + + + + ]: 167484 : if (isspace((unsigned char) *optstr) && !last_was_escape)
4293 andres@anarazel.de 527 : 7016 : break;
528 : :
529 [ + + + + ]: 160468 : if (!last_was_escape && *optstr == '\\')
530 : 20 : last_was_escape = true;
531 : : else
532 : : {
533 : 160448 : last_was_escape = false;
534 : 160448 : appendStringInfoChar(&s, *optstr);
535 : : }
536 : :
6118 tgl@sss.pgh.pa.us 537 : 160468 : optstr++;
538 : : }
539 : :
540 : : /* now store the option in the next argv[] position */
4293 andres@anarazel.de 541 : 11235 : argv[(*argcp)++] = pstrdup(s.data);
542 : : }
543 : :
3988 tgl@sss.pgh.pa.us 544 : 4219 : pfree(s.data);
6118 545 : 4219 : }
546 : :
547 : : /*
548 : : * Initialize MaxBackends value from config options.
549 : : *
550 : : * This must be called after modules have had the chance to alter GUCs in
551 : : * shared_preload_libraries and before shared memory size is determined.
552 : : *
553 : : * Note that in EXEC_BACKEND environment, the value is passed down from
554 : : * postmaster to subprocesses via BackendParameters in SubPostmasterMain; only
555 : : * postmaster itself and processes not under postmaster control should call
556 : : * this.
557 : : */
558 : : void
4896 alvherre@alvh.no-ip. 559 : 1246 : InitializeMaxBackends(void)
560 : : {
1509 rhaas@postgresql.org 561 [ - + ]: 1246 : Assert(MaxBackends == 0);
562 : :
563 : : /* Note that this does not include "auxiliary" processes */
509 nathan@postgresql.or 564 : 1246 : MaxBackends = MaxConnections + autovacuum_worker_slots +
518 tgl@sss.pgh.pa.us 565 : 1246 : max_worker_processes + max_wal_senders + NUM_SPECIAL_WORKER_PROCS;
566 : :
1509 rhaas@postgresql.org 567 [ - + ]: 1246 : if (MaxBackends > MAX_BACKENDS)
694 nathan@postgresql.or 568 [ # # ]:UBC 0 : ereport(ERROR,
569 : : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
570 : : errmsg("too many server processes configured"),
571 : : errdetail("\"max_connections\" (%d) plus \"autovacuum_worker_slots\" (%d) plus \"max_worker_processes\" (%d) plus \"max_wal_senders\" (%d) must be less than %d.",
572 : : MaxConnections, autovacuum_worker_slots,
573 : : max_worker_processes, max_wal_senders,
574 : : MAX_BACKENDS - (NUM_SPECIAL_WORKER_PROCS - 1))));
1355 tgl@sss.pgh.pa.us 575 :CBC 1246 : }
576 : :
577 : : /*
578 : : * Initialize the number of fast-path lock slots in PGPROC.
579 : : *
580 : : * This must be called after modules have had the chance to alter GUCs in
581 : : * shared_preload_libraries and before shared memory size is determined.
582 : : */
583 : : void
616 tomas.vondra@postgre 584 : 1246 : InitializeFastPathLocks(void)
585 : : {
586 : : /* Should be initialized only once. */
587 [ - + ]: 1246 : Assert(FastPathLockGroupsPerBackend == 0);
588 : :
589 : : /*
590 : : * Based on the max_locks_per_transaction GUC, as that's a good indicator
591 : : * of the expected number of locks, figure out the value for
592 : : * FastPathLockGroupsPerBackend. This must be a power-of-two. We cap the
593 : : * value at FP_LOCK_GROUPS_PER_BACKEND_MAX and insist the value is at
594 : : * least 1.
595 : : *
596 : : * The default max_locks_per_transaction = 128 means 8 groups by default.
597 : : */
398 drowley@postgresql.o 598 : 1246 : FastPathLockGroupsPerBackend =
599 [ + - + - : 1246 : Max(Min(pg_nextpower2_32(max_locks_per_xact) / FP_LOCK_SLOTS_PER_GROUP,
+ - ]
600 : : FP_LOCK_GROUPS_PER_BACKEND_MAX), 1);
601 : :
602 : : /* Validate we did get a power-of-two */
603 [ - + ]: 1246 : Assert(FastPathLockGroupsPerBackend ==
604 : : pg_nextpower2_32(FastPathLockGroupsPerBackend));
616 tomas.vondra@postgre 605 : 1246 : }
606 : :
607 : : /*
608 : : * Early initialization of a backend (either standalone or under postmaster).
609 : : * This happens even before InitPostgres.
610 : : *
611 : : * This is separate from InitPostgres because it is also called by auxiliary
612 : : * processes, such as the background writer process, which may not call
613 : : * InitPostgres at all.
614 : : */
615 : : void
9294 tgl@sss.pgh.pa.us 616 : 23199 : BaseInit(void)
617 : : {
1759 andres@anarazel.de 618 [ - + ]: 23199 : Assert(MyProc != NULL);
619 : :
620 : : /*
621 : : * Initialize our input/output/debugging file descriptors.
622 : : */
9294 tgl@sss.pgh.pa.us 623 : 23199 : DebugFileOpen();
624 : :
625 : : /*
626 : : * Initialize file access. Done early so other subsystems can access
627 : : * files.
628 : : */
1757 andres@anarazel.de 629 : 23199 : InitFileAccess();
630 : :
631 : : /*
632 : : * Initialize statistics reporting. This needs to happen early to ensure
633 : : * that pgstat's shutdown callback runs after the shutdown callbacks of
634 : : * all subsystems that can produce stats (like e.g. transaction commits
635 : : * can).
636 : : */
1758 637 : 23199 : pgstat_initialize();
638 : :
639 : : /*
640 : : * Initialize AIO before infrastructure that might need to actually
641 : : * execute AIO.
642 : : */
439 643 : 23199 : pgaio_init_backend();
644 : :
645 : : /* Do local initialization of storage and buffer managers */
2613 tmunro@postgresql.or 646 : 23199 : InitSync();
9294 tgl@sss.pgh.pa.us 647 : 23199 : smgrinit();
639 heikki.linnakangas@i 648 : 23199 : InitBufferManagerAccess();
649 : :
650 : : /*
651 : : * Initialize temporary file access after pgstat, so that the temporary
652 : : * file shutdown hook can report temporary file statistics.
653 : : */
1757 andres@anarazel.de 654 : 23199 : InitTemporaryFileAccess();
655 : :
656 : : /*
657 : : * Initialize local buffers for WAL record construction, in case we ever
658 : : * try to insert XLOG.
659 : : */
1656 rhaas@postgresql.org 660 : 23199 : InitXLogInsert();
661 : :
662 : : /* Initialize lock manager's local structs */
639 heikki.linnakangas@i 663 : 23199 : InitLockManagerAccess();
664 : :
665 : : /*
666 : : * Initialize replication slots after pgstat. The exit hook might need to
667 : : * drop ephemeral slots, which in turn triggers stats reporting.
668 : : */
1566 andres@anarazel.de 669 : 23199 : ReplicationSlotInitialize();
9294 tgl@sss.pgh.pa.us 670 : 23199 : }
671 : :
672 : :
673 : : /* --------------------------------
674 : : * InitPostgres
675 : : * Initialize POSTGRES.
676 : : *
677 : : * Parameters:
678 : : * in_dbname, dboid: specify database to connect to, as described below
679 : : * username, useroid: specify role to connect as, as described below
680 : : * flags:
681 : : * - INIT_PG_LOAD_SESSION_LIBS to honor [session|local]_preload_libraries.
682 : : * - INIT_PG_OVERRIDE_ALLOW_CONNS to connect despite !datallowconn.
683 : : * - INIT_PG_OVERRIDE_ROLE_LOGIN to connect despite !rolcanlogin.
684 : : * out_dbname: optional output parameter, see below; pass NULL if not used
685 : : *
686 : : * The database can be specified by name, using the in_dbname parameter, or by
687 : : * OID, using the dboid parameter. Specify NULL or InvalidOid respectively
688 : : * for the unused parameter. If dboid is provided, the actual database
689 : : * name can be returned to the caller in out_dbname. If out_dbname isn't
690 : : * NULL, it must point to a buffer of size NAMEDATALEN.
691 : : *
692 : : * Similarly, the role can be passed by name, using the username parameter,
693 : : * or by OID using the useroid parameter.
694 : : *
695 : : * In bootstrap mode the database and username parameters are NULL/InvalidOid.
696 : : * The autovacuum launcher process doesn't specify these parameters either,
697 : : * because it only goes far enough to be able to read pg_database; it doesn't
698 : : * connect to any particular database. An autovacuum worker specifies a
699 : : * database but not a username; conversely, a physical walsender specifies
700 : : * username but not database.
701 : : *
702 : : * By convention, INIT_PG_LOAD_SESSION_LIBS should be passed in "flags" in
703 : : * "interactive" sessions (including standalone backends), but not in
704 : : * background processes such as autovacuum. Note in particular that it
705 : : * shouldn't be true in parallel worker processes; those have another
706 : : * mechanism for replicating their leader's set of loaded libraries.
707 : : *
708 : : * We expect that InitProcess() was already called, so we already have a
709 : : * PGPROC struct ... but it's not completely filled in yet.
710 : : *
711 : : * Note:
712 : : * Be very careful with the order of calls in the InitPostgres function.
713 : : * --------------------------------
714 : : */
715 : : void
1405 716 : 18793 : InitPostgres(const char *in_dbname, Oid dboid,
717 : : const char *username, Oid useroid,
718 : : uint32 flags,
719 : : char *out_dbname)
720 : : {
9634 peter_e@gmx.net 721 : 18793 : bool bootstrap = IsBootstrapProcessingMode();
722 : : bool am_superuser;
723 : : char *fullpath;
724 : : char dbname[NAMEDATALEN];
1226 rhaas@postgresql.org 725 : 18793 : int nfree = 0;
726 : :
6118 tgl@sss.pgh.pa.us 727 [ + + ]: 18793 : elog(DEBUG3, "InitPostgres");
728 : :
729 : : /*
730 : : * Add my PGPROC struct to the ProcArray.
731 : : *
732 : : * Once I have done this, I am visible to other backends!
733 : : */
7451 734 : 18793 : InitProcessPhase2();
735 : :
736 : : /* Initialize status reporting */
452 michael@paquier.xyz 737 : 18793 : pgstat_beinit();
738 : :
739 : : /*
740 : : * And initialize an entry in the PgBackendStatus array. That way, if
741 : : * LWLocks or third-party authentication should happen to hang, it is
742 : : * possible to retrieve some information about what is going on.
743 : : */
744 [ + + ]: 18793 : if (!bootstrap)
745 : : {
746 : 18736 : pgstat_bestart_initial();
385 747 : 18736 : INJECTION_POINT("init-pre-auth", NULL);
748 : : }
749 : :
750 : : /*
751 : : * Initialize my entry in the shared-invalidation manager's array of
752 : : * per-backend data.
753 : : */
6006 simon@2ndQuadrant.co 754 : 18793 : SharedInvalBackendInit(false);
755 : :
756 : : /*
757 : : * Prevent consuming interrupts between setting ProcSignalInit and setting
758 : : * the initial local data checksum value. If a barrier is emitted, and
759 : : * absorbed, before local cached state is initialized the state transition
760 : : * can be invalid.
761 : : */
30 dgustafsson@postgres 762 :GNC 18793 : HOLD_INTERRUPTS();
763 : :
423 heikki.linnakangas@i 764 :CBC 18793 : ProcSignalInit(MyCancelKey, MyCancelKeyLength);
765 : :
766 : : /*
767 : : * Initialize a local cache of the data_checksum_version, to be updated by
768 : : * the procsignal-based barriers.
769 : : *
770 : : * This intentionally happens after initializing the procsignal, otherwise
771 : : * we might miss a state change. This means we can get a barrier for the
772 : : * state we've just initialized.
773 : : *
774 : : * The postmaster (which is what gets forked into the new child process)
775 : : * does not handle barriers, therefore it may not have the current value
776 : : * of LocalDataChecksumState value (it'll have the value read from the
777 : : * control file, which may be arbitrarily old).
778 : : *
779 : : * NB: Even if the postmaster handled barriers, the value might still be
780 : : * stale, as it might have changed after this process forked.
781 : : */
57 dgustafsson@postgres 782 :GNC 18793 : InitLocalDataChecksumState();
783 : :
30 784 [ - + ]: 18793 : RESUME_INTERRUPTS();
785 : :
786 : : /*
787 : : * Also set up timeout handlers needed for backend operation. We need
788 : : * these in every case except bootstrap.
789 : : */
5066 alvherre@alvh.no-ip. 790 [ + + ]:CBC 18793 : if (!bootstrap)
791 : : {
4134 andres@anarazel.de 792 : 18736 : RegisterTimeout(DEADLOCK_TIMEOUT, CheckDeadLockAlert);
5066 alvherre@alvh.no-ip. 793 : 18736 : RegisterTimeout(STATEMENT_TIMEOUT, StatementTimeoutHandler);
4823 tgl@sss.pgh.pa.us 794 : 18736 : RegisterTimeout(LOCK_TIMEOUT, LockTimeoutHandler);
3727 rhaas@postgresql.org 795 : 18736 : RegisterTimeout(IDLE_IN_TRANSACTION_SESSION_TIMEOUT,
796 : : IdleInTransactionSessionTimeoutHandler);
835 akorotkov@postgresql 797 : 18736 : RegisterTimeout(TRANSACTION_TIMEOUT, TransactionTimeoutHandler);
1970 tgl@sss.pgh.pa.us 798 : 18736 : RegisterTimeout(IDLE_SESSION_TIMEOUT, IdleSessionTimeoutHandler);
1883 tmunro@postgresql.or 799 : 18736 : RegisterTimeout(CLIENT_CONNECTION_CHECK_TIMEOUT, ClientCheckTimeoutHandler);
1515 andres@anarazel.de 800 : 18736 : RegisterTimeout(IDLE_STATS_UPDATE_TIMEOUT,
801 : : IdleStatsUpdateTimeoutHandler);
802 : : }
803 : :
804 : : /*
805 : : * If this is either a bootstrap process or a standalone backend, start up
806 : : * the XLOG machinery, and register to have it closed down at exit. In
807 : : * other cases, the startup process is responsible for starting up the
808 : : * XLOG machinery, and the checkpointer for closing it down.
809 : : */
1629 rhaas@postgresql.org 810 [ + + ]: 18793 : if (!IsUnderPostmaster)
811 : : {
812 : : /*
813 : : * We don't yet have an aux-process resource owner, but StartupXLOG
814 : : * and ShutdownXLOG will need one. Hence, create said resource owner
815 : : * (and register a callback to clean it up after ShutdownXLOG runs).
816 : : */
2873 tgl@sss.pgh.pa.us 817 : 133 : CreateAuxProcessResourceOwner();
818 : :
5884 819 : 133 : StartupXLOG();
820 : : /* Release (and warn about) any buffer pins leaked in StartupXLOG */
2873 821 : 133 : ReleaseAuxProcessResources(true);
822 : : /* Reset CurrentResourceOwner to nothing for the moment */
823 : 133 : CurrentResourceOwner = NULL;
824 : :
825 : : /*
826 : : * Use before_shmem_exit() so that ShutdownXLOG() can rely on DSM
827 : : * segments etc to work (which in turn is required for pgstats).
828 : : */
1515 andres@anarazel.de 829 : 133 : before_shmem_exit(pgstat_before_server_shutdown, 0);
1891 830 : 133 : before_shmem_exit(ShutdownXLOG, 0);
831 : : }
832 : :
833 : : /*
834 : : * Initialize the process-local logical info WAL logging state.
835 : : *
836 : : * This must be called after ProcSignalInit() so that the process can
837 : : * participate in procsignal-based barriers that update this state.
838 : : * Furthermore, in !IsUnderPostmaster cases, this must occur after
839 : : * StartupXLOG() where the shared state is first established.
840 : : */
23 msawada@postgresql.o 841 :GNC 18793 : InitializeProcessXLogLogicalInfo();
842 : :
843 : : /*
844 : : * Initialize the relation cache and the system catalog caches. Note that
845 : : * no catalog access happens here; we only set up the hashtable structure.
846 : : * We must do this before starting a transaction because transaction abort
847 : : * would try to touch these hashtables.
848 : : */
9044 tgl@sss.pgh.pa.us 849 :CBC 18793 : RelationCacheInitialize();
10492 bruce@momjian.us 850 : 18793 : InitCatalogCache();
7018 tgl@sss.pgh.pa.us 851 : 18793 : InitPlanCache();
852 : :
853 : : /* Initialize portal manager */
9114 854 : 18793 : EnablePortalManager();
855 : :
856 : : /*
857 : : * Load relcache entries for the shared system catalogs. This must create
858 : : * at least entries for pg_database and catalogs used for authentication.
859 : : */
6116 860 : 18793 : RelationCacheInitializePhase2();
861 : :
862 : : /*
863 : : * Set up process-exit callback to do pre-shutdown cleanup. This is one
864 : : * of the first before_shmem_exit callbacks we register; thus, this will
865 : : * be one of the last things we do before low-level modules like the
866 : : * buffer manager begin to close down. We need to have this in place
867 : : * before we begin our first transaction --- if we fail during the
868 : : * initialization transaction, as is entirely possible, we need the
869 : : * AbortTransaction call to clean up.
870 : : */
4546 rhaas@postgresql.org 871 : 18793 : before_shmem_exit(ShutdownPostgres, 0);
872 : :
873 : : /* The autovacuum launcher is done here */
817 heikki.linnakangas@i 874 [ + + ]: 18793 : if (AmAutoVacuumLauncherProcess())
875 : : {
876 : : /* fill in the remainder of this entry in the PgBackendStatus array */
452 michael@paquier.xyz 877 : 480 : pgstat_bestart_final();
878 : :
6115 tgl@sss.pgh.pa.us 879 : 1523 : return;
880 : : }
881 : :
882 : : /*
883 : : * Start a new transaction here before first access to db.
884 : : */
9656 inoue@tpf.co.jp 885 [ + + ]: 18313 : if (!bootstrap)
886 : : {
887 : : /* statement_timestamp must be set for timeouts to work correctly */
5404 tgl@sss.pgh.pa.us 888 : 18256 : SetCurrentStatementStartTimestamp();
8417 889 : 18256 : StartTransactionCommand();
890 : :
891 : : /*
892 : : * transaction_isolation will have been set to the default by the
893 : : * above. If the default is "serializable", and we are in hot
894 : : * standby, we will fail if we don't change it to something lower.
895 : : * Fortunately, "read committed" is plenty good enough.
896 : : */
5027 897 : 18256 : XactIsoLevel = XACT_READ_COMMITTED;
898 : : }
899 : :
900 : : /*
901 : : * Perform client authentication if necessary, then figure out our
902 : : * postgres user ID, and see if we are a superuser.
903 : : *
904 : : * In standalone mode, autovacuum worker processes and slot sync worker
905 : : * process, we use a fixed ID, otherwise we figure it out from the
906 : : * authenticated user name.
907 : : */
817 heikki.linnakangas@i 908 [ + + + + : 18313 : if (bootstrap || AmAutoVacuumWorkerProcess() || AmLogicalSlotSyncWorkerProcess())
+ + ]
909 : : {
5884 tgl@sss.pgh.pa.us 910 : 126 : InitializeSessionUserIdStandalone();
911 : 126 : am_superuser = true;
912 : : }
913 [ + + ]: 18187 : else if (!IsUnderPostmaster)
914 : : {
915 : 76 : InitializeSessionUserIdStandalone();
916 : 76 : am_superuser = true;
917 [ - + ]: 76 : if (!ThereIsAtLeastOneRole())
5884 tgl@sss.pgh.pa.us 918 [ # # # # ]:UBC 0 : ereport(WARNING,
919 : : (errcode(ERRCODE_UNDEFINED_OBJECT),
920 : : errmsg("no roles are defined in this database system"),
921 : : errhint("You should immediately run CREATE USER \"%s\" SUPERUSER;.",
922 : : username != NULL ? username : "postgres")));
923 : : }
57 dgustafsson@postgres 924 [ + + + + :GNC 18111 : else if (AmBackgroundWorkerProcess() || AmDataChecksumsWorkerProcess())
+ + ]
925 : : {
4135 rhaas@postgresql.org 926 [ + - + + ]:CBC 3165 : if (username == NULL && !OidIsValid(useroid))
927 : : {
4923 alvherre@alvh.no-ip. 928 : 560 : InitializeSessionUserIdStandalone();
929 : 560 : am_superuser = true;
930 : : }
931 : : else
932 : : {
961 michael@paquier.xyz 933 : 2605 : InitializeSessionUserId(username, useroid,
934 : 2605 : (flags & INIT_PG_OVERRIDE_ROLE_LOGIN) != 0);
518 tgl@sss.pgh.pa.us 935 : 2603 : am_superuser = superuser();
936 : : }
937 : : }
938 : : else
939 : : {
940 : : /* normal multiuser case */
5884 941 [ - + ]: 14946 : Assert(MyProcPort != NULL);
942 : 14946 : PerformAuthentication(MyProcPort);
961 michael@paquier.xyz 943 : 14739 : InitializeSessionUserId(username, useroid, false);
944 : : /* ensure that auth_method is actually valid, aka authn_id is not NULL */
1339 945 [ + + ]: 14735 : if (MyClientConnectionInfo.authn_id)
946 : 192 : InitializeSystemUser(MyClientConnectionInfo.authn_id,
947 : : hba_authname(MyClientConnectionInfo.auth_method));
5884 tgl@sss.pgh.pa.us 948 : 14735 : am_superuser = superuser();
949 : : }
950 : :
951 : : /* Report any SSL/GSS details for the session. */
452 michael@paquier.xyz 952 [ + + ]: 18100 : if (MyProcPort != NULL)
953 : : {
954 [ - + ]: 14735 : Assert(!bootstrap);
955 : :
956 : 14735 : pgstat_bestart_security();
957 : : }
958 : :
959 : : /*
960 : : * Binary upgrades only allowed super-user connections
961 : : */
5514 bruce@momjian.us 962 [ + + - + ]: 18100 : if (IsBinaryUpgrade && !am_superuser)
963 : : {
5469 bruce@momjian.us 964 [ # # ]:UBC 0 : ereport(FATAL,
965 : : (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
966 : : errmsg("must be superuser to connect in binary upgrade mode")));
967 : : }
968 : :
969 : : /*
970 : : * The last few regular connection slots are reserved for superusers and
971 : : * roles with privileges of pg_use_reserved_connections. We do not apply
972 : : * these limits to background processes, since they all have their own
973 : : * pools of PGPROC slots.
974 : : *
975 : : * Note: At this point, the new backend has already claimed a proc struct,
976 : : * so we must check whether the number of free slots is strictly less than
977 : : * the reserved connection limits.
978 : : */
518 tgl@sss.pgh.pa.us 979 [ + + + + ]:CBC 18100 : if (AmRegularBackendProcess() && !am_superuser &&
1226 rhaas@postgresql.org 980 [ + - ]: 415 : (SuperuserReservedConnections + ReservedConnections) > 0 &&
981 [ + + ]: 415 : !HaveNFreeProcs(SuperuserReservedConnections + ReservedConnections, &nfree))
982 : : {
983 [ + + ]: 4 : if (nfree < SuperuserReservedConnections)
984 [ + - ]: 1 : ereport(FATAL,
985 : : (errcode(ERRCODE_TOO_MANY_CONNECTIONS),
986 : : errmsg("remaining connection slots are reserved for roles with the %s attribute",
987 : : "SUPERUSER")));
988 : :
989 [ + + ]: 3 : if (!has_privs_of_role(GetUserId(), ROLE_PG_USE_RESERVED_CONNECTIONS))
990 [ + - ]: 1 : ereport(FATAL,
991 : : (errcode(ERRCODE_TOO_MANY_CONNECTIONS),
992 : : errmsg("remaining connection slots are reserved for roles with privileges of the \"%s\" role",
993 : : "pg_use_reserved_connections")));
994 : : }
995 : :
996 : : /* Check replication permissions needed for walsender processes. */
5884 tgl@sss.pgh.pa.us 997 [ + + ]: 18098 : if (am_walsender)
998 : : {
999 [ - + ]: 1291 : Assert(!bootstrap);
1000 : :
1171 peter@eisentraut.org 1001 [ - + ]: 1291 : if (!has_rolreplication(GetUserId()))
5883 tgl@sss.pgh.pa.us 1002 [ # # ]:UBC 0 : ereport(FATAL,
1003 : : (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
1004 : : errmsg("permission denied to start WAL sender"),
1005 : : errdetail("Only roles with the %s attribute may start a WAL sender process.",
1006 : : "REPLICATION")));
1007 : : }
1008 : :
1009 : : /*
1010 : : * If this is a plain walsender only supporting physical replication, we
1011 : : * don't want to connect to any particular database. Just finish the
1012 : : * backend startup by processing any options from the startup packet, and
1013 : : * we're done.
1014 : : */
4464 rhaas@postgresql.org 1015 [ + + + + ]:CBC 18098 : if (am_walsender && !am_db_walsender)
1016 : : {
1017 : : /* process any options passed in the startup packet */
5738 heikki.linnakangas@i 1018 [ + - ]: 513 : if (MyProcPort != NULL)
1019 : 513 : process_startup_options(MyProcPort, am_superuser);
1020 : :
1021 : : /* Apply PostAuthDelay as soon as we've read all options */
1022 [ - + ]: 513 : if (PostAuthDelay > 0)
5738 heikki.linnakangas@i 1023 :UBC 0 : pg_usleep(PostAuthDelay * 1000000L);
1024 : :
1025 : : /* initialize client encoding */
5738 heikki.linnakangas@i 1026 :CBC 513 : InitializeClientEncoding();
1027 : :
1028 : : /* fill in the remainder of this entry in the PgBackendStatus array */
452 michael@paquier.xyz 1029 : 513 : pgstat_bestart_final();
1030 : :
1031 : : /* close the transaction we started above */
5884 tgl@sss.pgh.pa.us 1032 : 513 : CommitTransactionCommand();
1033 : :
1034 : : /* send any WARNINGs we've accumulated during initialization */
108 nathan@postgresql.or 1035 :GNC 513 : EmitConnectionWarnings();
1036 : :
5884 tgl@sss.pgh.pa.us 1037 :CBC 513 : return;
1038 : : }
1039 : :
1040 : : /*
1041 : : * Set up the global variables holding database id and default tablespace.
1042 : : * But note we won't actually try to touch the database just yet.
1043 : : *
1044 : : * We take a shortcut in the bootstrap case, otherwise we have to look up
1045 : : * the db's entry in pg_database.
1046 : : */
1047 [ + + ]: 17585 : if (bootstrap)
1048 : : {
999 michael@paquier.xyz 1049 : 57 : dboid = Template1DbOid;
6135 tgl@sss.pgh.pa.us 1050 : 57 : MyDatabaseTableSpace = DEFAULTTABLESPACE_OID;
1051 : : }
1052 [ + + ]: 17528 : else if (in_dbname != NULL)
1053 : : {
1054 : : HeapTuple tuple;
1055 : : Form_pg_database dbform;
1056 : :
1057 : 14302 : tuple = GetDatabaseTuple(in_dbname);
1058 [ + + ]: 14302 : if (!HeapTupleIsValid(tuple))
1059 [ + - ]: 6 : ereport(FATAL,
1060 : : (errcode(ERRCODE_UNDEFINED_DATABASE),
1061 : : errmsg("database \"%s\" does not exist", in_dbname)));
1062 : 14296 : dbform = (Form_pg_database) GETSTRUCT(tuple);
999 michael@paquier.xyz 1063 : 14296 : dboid = dbform->oid;
1064 : : }
1065 [ + + ]: 3226 : else if (!OidIsValid(dboid))
1066 : : {
1067 : : /*
1068 : : * If this is a background worker not bound to any particular
1069 : : * database, we're done now. Everything that follows only makes sense
1070 : : * if we are bound to a specific database. We do need to close the
1071 : : * transaction we started before returning.
1072 : : */
3992 rhaas@postgresql.org 1073 [ + - ]: 530 : if (!bootstrap)
1074 : : {
452 michael@paquier.xyz 1075 : 530 : pgstat_bestart_final();
3992 rhaas@postgresql.org 1076 : 530 : CommitTransactionCommand();
1077 : : }
1078 : 530 : return;
1079 : : }
1080 : :
1081 : : /*
1082 : : * Now, take a writer's lock on the database we are trying to connect to.
1083 : : * If there is a concurrently running DROP DATABASE on that database, this
1084 : : * will block us until it finishes (and has committed its update of
1085 : : * pg_database).
1086 : : *
1087 : : * Note that the lock is not held long, only until the end of this startup
1088 : : * transaction. This is OK since we will advertise our use of the
1089 : : * database in the ProcArray before dropping the lock (in fact, that's the
1090 : : * next thing to do). Anyone trying a DROP DATABASE after this point will
1091 : : * see us in the array once they have the lock. Ordering is important for
1092 : : * this because we don't want to advertise ourselves as being in this
1093 : : * database until we have the lock; otherwise we create what amounts to a
1094 : : * deadlock with CountOtherDBBackends().
1095 : : *
1096 : : * Note: use of RowExclusiveLock here is reasonable because we envision
1097 : : * our session as being a concurrent writer of the database. If we had a
1098 : : * way of declaring a session as being guaranteed-read-only, we could use
1099 : : * AccessShareLock for such sessions and thereby not conflict against
1100 : : * CREATE DATABASE.
1101 : : */
5884 tgl@sss.pgh.pa.us 1102 [ + + ]: 17049 : if (!bootstrap)
999 michael@paquier.xyz 1103 : 16992 : LockSharedObject(DatabaseRelationId, dboid, 0, RowExclusiveLock);
1104 : :
1105 : : /*
1106 : : * Recheck pg_database to make sure the target database hasn't gone away.
1107 : : * If there was a concurrent DROP DATABASE, this ensures we will die
1108 : : * cleanly without creating a mess.
1109 : : */
1110 [ + + ]: 17049 : if (!bootstrap)
1111 : : {
1112 : : HeapTuple tuple;
1113 : : Form_pg_database datform;
1114 : :
1115 : 16992 : tuple = GetDatabaseTupleByOid(dboid);
1116 [ + - ]: 16992 : if (HeapTupleIsValid(tuple))
1117 : 16992 : datform = (Form_pg_database) GETSTRUCT(tuple);
1118 : :
1119 [ + - + + ]: 16992 : if (!HeapTupleIsValid(tuple) ||
1120 [ - + ]: 14296 : (in_dbname && namestrcmp(&datform->datname, in_dbname)))
1121 : : {
999 michael@paquier.xyz 1122 [ # # ]:UBC 0 : if (in_dbname)
1123 [ # # ]: 0 : ereport(FATAL,
1124 : : (errcode(ERRCODE_UNDEFINED_DATABASE),
1125 : : errmsg("database \"%s\" does not exist", in_dbname),
1126 : : errdetail("It seems to have just been dropped or renamed.")));
1127 : : else
1128 [ # # ]: 0 : ereport(FATAL,
1129 : : (errcode(ERRCODE_UNDEFINED_DATABASE),
1130 : : errmsg("database %u does not exist", dboid)));
1131 : : }
1132 : :
999 michael@paquier.xyz 1133 :CBC 16992 : strlcpy(dbname, NameStr(datform->datname), sizeof(dbname));
1134 : :
1135 [ + + ]: 16992 : if (database_is_invalid_form(datform))
1136 : : {
1137 [ + - ]: 5 : ereport(FATAL,
1138 : : errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1139 : : errmsg("cannot connect to invalid database \"%s\"", dbname),
1140 : : errhint("Use DROP DATABASE to drop invalid databases."));
1141 : : }
1142 : :
1143 : 16987 : MyDatabaseTableSpace = datform->dattablespace;
957 akorotkov@postgresql 1144 : 16987 : MyDatabaseHasLoginEventTriggers = datform->dathasloginevt;
1145 : : /* pass the database name back to the caller */
999 michael@paquier.xyz 1146 [ + + ]: 16987 : if (out_dbname)
1147 : 63 : strcpy(out_dbname, dbname);
1148 : : }
1149 : :
1150 : : /*
1151 : : * Now that we rechecked, we are certain to be connected to a database and
1152 : : * thus can set MyDatabaseId.
1153 : : *
1154 : : * It is important that MyDatabaseId only be set once we are sure that the
1155 : : * target database can no longer be concurrently dropped or renamed. For
1156 : : * example, without this guarantee, pgstat_update_dbstats() could create
1157 : : * entries for databases that were just dropped in the pgstat shutdown
1158 : : * callback, which could confuse other code paths like the autovacuum
1159 : : * scheduler.
1160 : : */
1161 : 17044 : MyDatabaseId = dboid;
1162 : :
1163 : : /*
1164 : : * Now we can mark our PGPROC entry with the database ID.
1165 : : *
1166 : : * We assume this is an atomic store so no lock is needed; though actually
1167 : : * things would work fine even if it weren't atomic. Anyone searching the
1168 : : * ProcArray for this database's ID should hold the database lock, so they
1169 : : * would not be executing concurrently with this store. A process looking
1170 : : * for another database's ID could in theory see a chance match if it read
1171 : : * a partially-updated databaseId value; but as long as all such searches
1172 : : * wait and retry, as in CountOtherDBBackends(), they will certainly see
1173 : : * the correct value on their next try.
1174 : : */
4012 tgl@sss.pgh.pa.us 1175 : 17044 : MyProc->databaseId = MyDatabaseId;
1176 : :
1177 : : /*
1178 : : * We established a catalog snapshot while reading pg_authid and/or
1179 : : * pg_database; but until we have set up MyDatabaseId, we won't react to
1180 : : * incoming sinval messages for unshared catalogs, so we won't realize it
1181 : : * if the snapshot has been invalidated. Assume it's no good anymore.
1182 : : */
1183 : 17044 : InvalidateCatalogSnapshot();
1184 : :
1185 : : /*
1186 : : * Now we should be able to access the database directory safely. Verify
1187 : : * it's there and looks reasonable.
1188 : : */
6135 1189 : 17044 : fullpath = GetDatabasePath(MyDatabaseId, MyDatabaseTableSpace);
1190 : :
5884 1191 [ + + ]: 17044 : if (!bootstrap)
1192 : : {
7331 1193 [ - + ]: 16987 : if (access(fullpath, F_OK) == -1)
1194 : : {
7331 tgl@sss.pgh.pa.us 1195 [ # # ]:UBC 0 : if (errno == ENOENT)
1196 [ # # ]: 0 : ereport(FATAL,
1197 : : (errcode(ERRCODE_UNDEFINED_DATABASE),
1198 : : errmsg("database \"%s\" does not exist",
1199 : : dbname),
1200 : : errdetail("The database subdirectory \"%s\" is missing.",
1201 : : fullpath)));
1202 : : else
1203 [ # # ]: 0 : ereport(FATAL,
1204 : : (errcode_for_file_access(),
1205 : : errmsg("could not access directory \"%s\": %m",
1206 : : fullpath)));
1207 : : }
1208 : :
7331 tgl@sss.pgh.pa.us 1209 :CBC 16987 : ValidatePgVersion(fullpath);
1210 : : }
1211 : :
6135 1212 : 17044 : SetDatabasePath(fullpath);
1496 alvherre@alvh.no-ip. 1213 : 17044 : pfree(fullpath);
1214 : :
1215 : : /*
1216 : : * It's now possible to do real access to the system catalogs.
1217 : : *
1218 : : * Load relcache entries for the system catalogs. This must create at
1219 : : * least the minimum set of "nailed-in" cache entries.
1220 : : */
6135 tgl@sss.pgh.pa.us 1221 : 17044 : RelationCacheInitializePhase3();
1222 : :
1223 : : /* set up ACL framework (so CheckMyDatabase can check permissions) */
7335 1224 : 17041 : initialize_acl();
1225 : :
1226 : : /*
1227 : : * Re-read the pg_database row for our database, check permissions and set
1228 : : * up database-specific GUC settings. We can't do this until all the
1229 : : * database-access infrastructure is up. (Also, it wants to know if the
1230 : : * user is a superuser, so the above stuff has to happen first.)
1231 : : */
5884 1232 [ + + ]: 17041 : if (!bootstrap)
962 michael@paquier.xyz 1233 : 16984 : CheckMyDatabase(dbname, am_superuser,
1234 : 16984 : (flags & INIT_PG_OVERRIDE_ALLOW_CONNS) != 0);
1235 : :
1236 : : /*
1237 : : * Now process any command-line switches and any additional GUC variable
1238 : : * settings passed in the startup packet. We couldn't do this before
1239 : : * because we didn't know if client is a superuser.
1240 : : */
5738 heikki.linnakangas@i 1241 [ + + ]: 17038 : if (MyProcPort != NULL)
1242 : 14209 : process_startup_options(MyProcPort, am_superuser);
1243 : :
1244 : : /* Process pg_db_role_setting options */
1245 : 17038 : process_settings(MyDatabaseId, GetSessionUserId());
1246 : :
1247 : : /* Apply PostAuthDelay as soon as we've read all options */
1248 [ - + ]: 17035 : if (PostAuthDelay > 0)
5738 heikki.linnakangas@i 1249 :UBC 0 : pg_usleep(PostAuthDelay * 1000000L);
1250 : :
1251 : : /*
1252 : : * Initialize various default states that can't be set up until we've
1253 : : * selected the active user and gotten the right GUC settings.
1254 : : */
1255 : :
1256 : : /* set default namespace search path */
5738 heikki.linnakangas@i 1257 :CBC 17035 : InitializeSearchPath();
1258 : :
1259 : : /* initialize client encoding */
1260 : 17035 : InitializeClientEncoding();
1261 : :
1262 : : /* Initialize this backend's session state. */
3180 andres@anarazel.de 1263 : 17035 : InitializeSession();
1264 : :
1265 : : /*
1266 : : * If this is an interactive session, load any libraries that should be
1267 : : * preloaded at backend start. Since those are determined by GUCs, this
1268 : : * can't happen until GUC settings are complete, but we want it to happen
1269 : : * during the initial transaction in case anything that requires database
1270 : : * access needs to be done.
1271 : : */
962 michael@paquier.xyz 1272 [ + + ]: 17035 : if ((flags & INIT_PG_LOAD_SESSION_LIBS) != 0)
1405 tgl@sss.pgh.pa.us 1273 : 13505 : process_session_preload_libraries();
1274 : :
1275 : : /* fill in the remainder of this entry in the PgBackendStatus array */
5738 heikki.linnakangas@i 1276 [ + + ]: 17035 : if (!bootstrap)
452 michael@paquier.xyz 1277 : 16978 : pgstat_bestart_final();
1278 : :
1279 : : /* close the transaction we started above */
5738 heikki.linnakangas@i 1280 [ + + ]: 17035 : if (!bootstrap)
1281 : 16978 : CommitTransactionCommand();
1282 : :
1283 : : /* send any WARNINGs we've accumulated during initialization */
108 nathan@postgresql.or 1284 :GNC 17035 : EmitConnectionWarnings();
1285 : : }
1286 : :
1287 : : /*
1288 : : * Process any command-line switches and any additional GUC variable
1289 : : * settings passed in the startup packet.
1290 : : */
1291 : : static void
5738 heikki.linnakangas@i 1292 :CBC 14722 : process_startup_options(Port *port, bool am_superuser)
1293 : : {
1294 : : GucContext gucctx;
1295 : : ListCell *gucopts;
1296 : :
4277 tgl@sss.pgh.pa.us 1297 [ + + ]: 14722 : gucctx = am_superuser ? PGC_SU_BACKEND : PGC_BACKEND;
1298 : :
1299 : : /*
1300 : : * First process any command-line switches that were included in the
1301 : : * startup packet, if we are in a regular backend.
1302 : : */
5738 heikki.linnakangas@i 1303 [ + + ]: 14722 : if (port->cmdline_options != NULL)
1304 : : {
1305 : : /*
1306 : : * The maximum possible number of commandline arguments that could
1307 : : * come from port->cmdline_options is (strlen + 1) / 2; see
1308 : : * pg_split_opts().
1309 : : */
1310 : : char **av;
1311 : : int maxac;
1312 : : int ac;
1313 : :
1314 : 4219 : maxac = 2 + (strlen(port->cmdline_options) + 1) / 2;
1315 : :
171 michael@paquier.xyz 1316 :GNC 4219 : av = palloc_array(char *, maxac);
6115 tgl@sss.pgh.pa.us 1317 :CBC 4219 : ac = 0;
1318 : :
1319 : 4219 : av[ac++] = "postgres";
1320 : :
5738 heikki.linnakangas@i 1321 : 4219 : pg_split_opts(av, &ac, port->cmdline_options);
1322 : :
6115 tgl@sss.pgh.pa.us 1323 : 4219 : av[ac] = NULL;
1324 : :
1325 [ - + ]: 4219 : Assert(ac < maxac);
1326 : :
4807 1327 : 4219 : (void) process_postgres_switches(ac, av, gucctx, NULL);
1328 : : }
1329 : :
1330 : : /*
1331 : : * Process any additional GUC variable settings passed in startup packet.
1332 : : * These are handled exactly like command-line variables.
1333 : : */
5738 heikki.linnakangas@i 1334 : 14722 : gucopts = list_head(port->guc_options);
1335 [ + + ]: 35351 : while (gucopts)
1336 : : {
1337 : : char *name;
1338 : : char *value;
1339 : :
1340 : 20629 : name = lfirst(gucopts);
2511 tgl@sss.pgh.pa.us 1341 : 20629 : gucopts = lnext(port->guc_options, gucopts);
1342 : :
5738 heikki.linnakangas@i 1343 : 20629 : value = lfirst(gucopts);
2511 tgl@sss.pgh.pa.us 1344 : 20629 : gucopts = lnext(port->guc_options, gucopts);
1345 : :
5738 heikki.linnakangas@i 1346 : 20629 : SetConfigOption(name, value, gucctx, PGC_S_CLIENT);
1347 : : }
9294 tgl@sss.pgh.pa.us 1348 : 14722 : }
1349 : :
1350 : : /*
1351 : : * Load GUC settings from pg_db_role_setting.
1352 : : *
1353 : : * We try specific settings for the database/role combination, as well as
1354 : : * general for this database and for this user.
1355 : : */
1356 : : static void
6079 alvherre@alvh.no-ip. 1357 : 17038 : process_settings(Oid databaseid, Oid roleid)
1358 : : {
1359 : : Relation relsetting;
1360 : : Snapshot snapshot;
1361 : :
1362 [ + + ]: 17038 : if (!IsUnderPostmaster)
1363 : 131 : return;
1364 : :
2686 andres@anarazel.de 1365 : 16907 : relsetting = table_open(DbRoleSettingRelationId, AccessShareLock);
1366 : :
1367 : : /* read all the settings under the same snapshot for efficiency */
4715 rhaas@postgresql.org 1368 : 16907 : snapshot = RegisterSnapshot(GetCatalogSnapshot(DbRoleSettingRelationId));
1369 : :
1370 : : /* Later settings are ignored if set earlier. */
1371 : 16907 : ApplySetting(snapshot, databaseid, roleid, relsetting, PGC_S_DATABASE_USER);
1372 : 16904 : ApplySetting(snapshot, InvalidOid, roleid, relsetting, PGC_S_USER);
1373 : 16904 : ApplySetting(snapshot, databaseid, InvalidOid, relsetting, PGC_S_DATABASE);
1374 : 16904 : ApplySetting(snapshot, InvalidOid, InvalidOid, relsetting, PGC_S_GLOBAL);
1375 : :
1376 : 16904 : UnregisterSnapshot(snapshot);
2686 andres@anarazel.de 1377 : 16904 : table_close(relsetting, AccessShareLock);
1378 : : }
1379 : :
1380 : : /*
1381 : : * Backend-shutdown callback. Do cleanup that we want to be sure happens
1382 : : * before all the supporting modules begin to nail their doors shut via
1383 : : * their own callbacks.
1384 : : *
1385 : : * User-level cleanup, such as temp-relation removal and UNLISTEN, happens
1386 : : * via separate callbacks that execute before this one. We don't combine the
1387 : : * callbacks because we still want this one to happen if the user-level
1388 : : * cleanup fails.
1389 : : */
1390 : : static void
8205 peter_e@gmx.net 1391 : 18793 : ShutdownPostgres(int code, Datum arg)
1392 : : {
1393 : : /* Make sure we've killed any active transaction */
7600 tgl@sss.pgh.pa.us 1394 : 18793 : AbortOutOfAnyTransaction();
1395 : :
1396 : : /*
1397 : : * User locks are not released by transaction end, so be sure to release
1398 : : * them explicitly.
1399 : : */
1400 : 18793 : LockReleaseAll(USER_LOCKMETHOD, true);
9733 vadim4o@yahoo.com 1401 : 18793 : }
1402 : :
1403 : :
1404 : : /*
1405 : : * STATEMENT_TIMEOUT handler: trigger a query-cancel interrupt.
1406 : : */
1407 : : static void
5066 alvherre@alvh.no-ip. 1408 : 6 : StatementTimeoutHandler(void)
1409 : : {
4025 bruce@momjian.us 1410 : 6 : int sig = SIGINT;
1411 : :
1412 : : /*
1413 : : * During authentication the timeout is used to deal with
1414 : : * authentication_timeout - we want to quit in response to such timeouts.
1415 : : */
4134 andres@anarazel.de 1416 [ - + ]: 6 : if (ClientAuthInProgress)
4134 andres@anarazel.de 1417 :UBC 0 : sig = SIGTERM;
1418 : :
1419 : : #ifdef HAVE_SETSID
1420 : : /* try to signal whole process group */
4134 andres@anarazel.de 1421 :CBC 6 : kill(-MyProcPid, sig);
1422 : : #endif
1423 : 6 : kill(MyProcPid, sig);
5066 alvherre@alvh.no-ip. 1424 : 6 : }
1425 : :
1426 : : /*
1427 : : * LOCK_TIMEOUT handler: trigger a query-cancel interrupt.
1428 : : */
1429 : : static void
4823 tgl@sss.pgh.pa.us 1430 : 4 : LockTimeoutHandler(void)
1431 : : {
1432 : : #ifdef HAVE_SETSID
1433 : : /* try to signal whole process group */
1434 : 4 : kill(-MyProcPid, SIGINT);
1435 : : #endif
1436 : 4 : kill(MyProcPid, SIGINT);
1437 : 4 : }
1438 : :
1439 : : static void
835 akorotkov@postgresql 1440 : 1 : TransactionTimeoutHandler(void)
1441 : : {
1442 : 1 : TransactionTimeoutPending = true;
1443 : 1 : InterruptPending = true;
1444 : 1 : SetLatch(MyLatch);
1445 : 1 : }
1446 : :
1447 : : static void
3727 rhaas@postgresql.org 1448 : 1 : IdleInTransactionSessionTimeoutHandler(void)
1449 : : {
1450 : 1 : IdleInTransactionSessionTimeoutPending = true;
1451 : 1 : InterruptPending = true;
1452 : 1 : SetLatch(MyLatch);
1453 : 1 : }
1454 : :
1455 : : static void
1970 tgl@sss.pgh.pa.us 1456 : 1 : IdleSessionTimeoutHandler(void)
1457 : : {
1458 : 1 : IdleSessionTimeoutPending = true;
1459 : 1 : InterruptPending = true;
1460 : 1 : SetLatch(MyLatch);
1461 : 1 : }
1462 : :
1463 : : static void
1515 andres@anarazel.de 1464 : 26 : IdleStatsUpdateTimeoutHandler(void)
1465 : : {
1466 : 26 : IdleStatsUpdateTimeoutPending = true;
1467 : 26 : InterruptPending = true;
1468 : 26 : SetLatch(MyLatch);
1469 : 26 : }
1470 : :
1471 : : static void
1883 tmunro@postgresql.or 1472 :UBC 0 : ClientCheckTimeoutHandler(void)
1473 : : {
1474 : 0 : CheckClientConnectionPending = true;
1475 : 0 : InterruptPending = true;
1476 : 0 : SetLatch(MyLatch);
1477 : 0 : }
1478 : :
1479 : : /*
1480 : : * Returns true if at least one role is defined in this database cluster.
1481 : : */
1482 : : static bool
7641 tgl@sss.pgh.pa.us 1483 :CBC 76 : ThereIsAtLeastOneRole(void)
1484 : : {
1485 : : Relation pg_authid_rel;
1486 : : TableScanDesc scan;
1487 : : bool result;
1488 : :
2686 andres@anarazel.de 1489 : 76 : pg_authid_rel = table_open(AuthIdRelationId, AccessShareLock);
1490 : :
2637 1491 : 76 : scan = table_beginscan_catalog(pg_authid_rel, 0, NULL);
8776 tgl@sss.pgh.pa.us 1492 : 76 : result = (heap_getnext(scan, ForwardScanDirection) != NULL);
1493 : :
2637 andres@anarazel.de 1494 : 76 : table_endscan(scan);
2686 1495 : 76 : table_close(pg_authid_rel, AccessShareLock);
1496 : :
9030 peter_e@gmx.net 1497 : 76 : return result;
1498 : : }
1499 : :
1500 : : /*
1501 : : * Stores a warning message to be sent later via EmitConnectionWarnings().
1502 : : * Both msg and detail must be non-NULL.
1503 : : *
1504 : : * NB: Caller should ensure the strings are allocated in a long-lived context
1505 : : * like TopMemoryContext.
1506 : : */
1507 : : void
108 nathan@postgresql.or 1508 :GNC 2 : StoreConnectionWarning(char *msg, char *detail)
1509 : : {
1510 : : MemoryContext oldcontext;
1511 : :
1512 [ - + ]: 2 : Assert(msg);
1513 [ - + ]: 2 : Assert(detail);
1514 : :
1515 [ - + ]: 2 : if (ConnectionWarningsEmitted)
108 nathan@postgresql.or 1516 [ # # ]:UNC 0 : elog(ERROR, "StoreConnectionWarning() called after EmitConnectionWarnings()");
1517 : :
108 nathan@postgresql.or 1518 :GNC 2 : oldcontext = MemoryContextSwitchTo(TopMemoryContext);
1519 : :
1520 : 2 : ConnectionWarningMessages = lappend(ConnectionWarningMessages, msg);
1521 : 2 : ConnectionWarningDetails = lappend(ConnectionWarningDetails, detail);
1522 : :
1523 : 2 : MemoryContextSwitchTo(oldcontext);
1524 : 2 : }
1525 : :
1526 : : /*
1527 : : * Sends the warning messages saved via StoreConnectionWarning() and frees the
1528 : : * strings and lists.
1529 : : *
1530 : : * NB: This can only be called once per backend.
1531 : : */
1532 : : static void
1533 : 17548 : EmitConnectionWarnings(void)
1534 : : {
1535 : : ListCell *lc_msg;
1536 : : ListCell *lc_detail;
1537 : :
1538 [ - + ]: 17548 : if (ConnectionWarningsEmitted)
108 nathan@postgresql.or 1539 [ # # ]:UNC 0 : elog(ERROR, "EmitConnectionWarnings() called more than once");
1540 : : else
108 nathan@postgresql.or 1541 :GNC 17548 : ConnectionWarningsEmitted = true;
1542 : :
1543 : 17550 : forboth(lc_msg, ConnectionWarningMessages,
[ + + + +
+ + + + +
+ + - +
+ ]
1544 : : lc_detail, ConnectionWarningDetails)
1545 : : {
1546 [ + - ]: 2 : ereport(WARNING,
1547 : : (errmsg("%s", (char *) lfirst(lc_msg)),
1548 : : errdetail("%s", (char *) lfirst(lc_detail))));
1549 : : }
1550 : :
1551 : 17548 : list_free_deep(ConnectionWarningMessages);
1552 : 17548 : list_free_deep(ConnectionWarningDetails);
1553 : 17548 : }
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