PostgreSQL Source Code  git master
postinit.c File Reference
#include "postgres.h"
#include <ctype.h>
#include <fcntl.h>
#include <unistd.h>
#include "access/genam.h"
#include "access/heapam.h"
#include "access/htup_details.h"
#include "access/session.h"
#include "access/sysattr.h"
#include "access/tableam.h"
#include "access/xact.h"
#include "access/xlog.h"
#include "catalog/catalog.h"
#include "catalog/indexing.h"
#include "catalog/namespace.h"
#include "catalog/pg_authid.h"
#include "catalog/pg_database.h"
#include "catalog/pg_db_role_setting.h"
#include "catalog/pg_tablespace.h"
#include "libpq/auth.h"
#include "libpq/libpq-be.h"
#include "mb/pg_wchar.h"
#include "miscadmin.h"
#include "pgstat.h"
#include "postmaster/autovacuum.h"
#include "postmaster/postmaster.h"
#include "replication/walsender.h"
#include "storage/bufmgr.h"
#include "storage/fd.h"
#include "storage/ipc.h"
#include "storage/lmgr.h"
#include "storage/proc.h"
#include "storage/procarray.h"
#include "storage/procsignal.h"
#include "storage/sinvaladt.h"
#include "storage/smgr.h"
#include "storage/sync.h"
#include "tcop/tcopprot.h"
#include "utils/acl.h"
#include "utils/fmgroids.h"
#include "utils/guc.h"
#include "utils/memutils.h"
#include "utils/pg_locale.h"
#include "utils/portal.h"
#include "utils/ps_status.h"
#include "utils/snapmgr.h"
#include "utils/syscache.h"
#include "utils/timeout.h"
Include dependency graph for postinit.c:

Go to the source code of this file.

Functions

static HeapTuple GetDatabaseTuple (const char *dbname)
 
static HeapTuple GetDatabaseTupleByOid (Oid dboid)
 
static void PerformAuthentication (Port *port)
 
static void CheckMyDatabase (const char *name, bool am_superuser, bool override_allow_connections)
 
static void InitCommunication (void)
 
static void ShutdownPostgres (int code, Datum arg)
 
static void StatementTimeoutHandler (void)
 
static void LockTimeoutHandler (void)
 
static void IdleInTransactionSessionTimeoutHandler (void)
 
static bool ThereIsAtLeastOneRole (void)
 
static void process_startup_options (Port *port, bool am_superuser)
 
static void process_settings (Oid databaseid, Oid roleid)
 
void pg_split_opts (char **argv, int *argcp, const char *optstr)
 
void InitializeMaxBackends (void)
 
void BaseInit (void)
 
void InitPostgres (const char *in_dbname, Oid dboid, const char *username, Oid useroid, char *out_dbname, bool override_allow_connections)
 

Function Documentation

◆ BaseInit()

void BaseInit ( void  )

Definition at line 547 of file postinit.c.

References DebugFileOpen(), InitBufferPoolAccess(), InitCommunication(), InitFileAccess(), InitSync(), and smgrinit().

Referenced by AutoVacLauncherMain(), AutoVacWorkerMain(), AuxiliaryProcessMain(), PostgresMain(), and StartBackgroundWorker().

548 {
549  /*
550  * Attach to shared memory and semaphores, and initialize our
551  * input/output/debugging file descriptors.
552  */
554  DebugFileOpen();
555 
556  /* Do local initialization of file, storage and buffer managers */
557  InitFileAccess();
558  InitSync();
559  smgrinit();
561 }
static void InitCommunication(void)
Definition: postinit.c:439
void InitBufferPoolAccess(void)
Definition: bufmgr.c:2455
void DebugFileOpen(void)
Definition: elog.c:1953
void smgrinit(void)
Definition: smgr.c:110
void InitSync(void)
Definition: sync.c:106
void InitFileAccess(void)
Definition: fd.c:821

◆ CheckMyDatabase()

static void CheckMyDatabase ( const char *  name,
bool  am_superuser,
bool  override_allow_connections 
)
static

Definition at line 316 of file postinit.c.

References ACL_CONNECT, ACLCHECK_OK, check_strxfrm_bug(), CountDBConnections(), DATABASEOID, elog, ereport, errcode(), errdetail(), errhint(), errmsg(), ERROR, FATAL, GetDatabaseEncodingName(), GETSTRUCT, GetUserId(), HeapTupleIsValid, IsAutoVacuumWorkerProcess(), IsUnderPostmaster, MyDatabaseId, NameStr, ObjectIdGetDatum, pg_database_aclcheck(), pg_perm_setlocale(), PGC_BACKEND, PGC_INTERNAL, PGC_S_DYNAMIC_DEFAULT, PGC_S_OVERRIDE, ReleaseSysCache(), SearchSysCache1(), SetConfigOption(), and SetDatabaseEncoding().

Referenced by InitPostgres().

317 {
318  HeapTuple tup;
319  Form_pg_database dbform;
320  char *collate;
321  char *ctype;
322 
323  /* Fetch our pg_database row normally, via syscache */
325  if (!HeapTupleIsValid(tup))
326  elog(ERROR, "cache lookup failed for database %u", MyDatabaseId);
327  dbform = (Form_pg_database) GETSTRUCT(tup);
328 
329  /* This recheck is strictly paranoia */
330  if (strcmp(name, NameStr(dbform->datname)) != 0)
331  ereport(FATAL,
332  (errcode(ERRCODE_UNDEFINED_DATABASE),
333  errmsg("database \"%s\" has disappeared from pg_database",
334  name),
335  errdetail("Database OID %u now seems to belong to \"%s\".",
336  MyDatabaseId, NameStr(dbform->datname))));
337 
338  /*
339  * Check permissions to connect to the database.
340  *
341  * These checks are not enforced when in standalone mode, so that there is
342  * a way to recover from disabling all access to all databases, for
343  * example "UPDATE pg_database SET datallowconn = false;".
344  *
345  * We do not enforce them for autovacuum worker processes either.
346  */
348  {
349  /*
350  * Check that the database is currently allowing connections.
351  */
352  if (!dbform->datallowconn && !override_allow_connections)
353  ereport(FATAL,
354  (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
355  errmsg("database \"%s\" is not currently accepting connections",
356  name)));
357 
358  /*
359  * Check privilege to connect to the database. (The am_superuser test
360  * is redundant, but since we have the flag, might as well check it
361  * and save a few cycles.)
362  */
363  if (!am_superuser &&
366  ereport(FATAL,
367  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
368  errmsg("permission denied for database \"%s\"", name),
369  errdetail("User does not have CONNECT privilege.")));
370 
371  /*
372  * Check connection limit for this database.
373  *
374  * There is a race condition here --- we create our PGPROC before
375  * checking for other PGPROCs. If two backends did this at about the
376  * same time, they might both think they were over the limit, while
377  * ideally one should succeed and one fail. Getting that to work
378  * exactly seems more trouble than it is worth, however; instead we
379  * just document that the connection limit is approximate.
380  */
381  if (dbform->datconnlimit >= 0 &&
382  !am_superuser &&
383  CountDBConnections(MyDatabaseId) > dbform->datconnlimit)
384  ereport(FATAL,
385  (errcode(ERRCODE_TOO_MANY_CONNECTIONS),
386  errmsg("too many connections for database \"%s\"",
387  name)));
388  }
389 
390  /*
391  * OK, we're golden. Next to-do item is to save the encoding info out of
392  * the pg_database tuple.
393  */
394  SetDatabaseEncoding(dbform->encoding);
395  /* Record it as a GUC internal option, too */
396  SetConfigOption("server_encoding", GetDatabaseEncodingName(),
398  /* If we have no other source of client_encoding, use server encoding */
399  SetConfigOption("client_encoding", GetDatabaseEncodingName(),
401 
402  /* assign locale variables */
403  collate = NameStr(dbform->datcollate);
404  ctype = NameStr(dbform->datctype);
405 
406  if (pg_perm_setlocale(LC_COLLATE, collate) == NULL)
407  ereport(FATAL,
408  (errmsg("database locale is incompatible with operating system"),
409  errdetail("The database was initialized with LC_COLLATE \"%s\", "
410  " which is not recognized by setlocale().", collate),
411  errhint("Recreate the database with another locale or install the missing locale.")));
412 
413  if (pg_perm_setlocale(LC_CTYPE, ctype) == NULL)
414  ereport(FATAL,
415  (errmsg("database locale is incompatible with operating system"),
416  errdetail("The database was initialized with LC_CTYPE \"%s\", "
417  " which is not recognized by setlocale().", ctype),
418  errhint("Recreate the database with another locale or install the missing locale.")));
419 
420  /* Make the locale settings visible as GUC variables, too */
421  SetConfigOption("lc_collate", collate, PGC_INTERNAL, PGC_S_OVERRIDE);
422  SetConfigOption("lc_ctype", ctype, PGC_INTERNAL, PGC_S_OVERRIDE);
423 
425 
426  ReleaseSysCache(tup);
427 }
int errhint(const char *fmt,...)
Definition: elog.c:1069
#define GETSTRUCT(TUP)
Definition: htup_details.h:655
Oid GetUserId(void)
Definition: miscinit.c:380
FormData_pg_database * Form_pg_database
Definition: pg_database.h:81
int errcode(int sqlerrcode)
Definition: elog.c:608
char * pg_perm_setlocale(int category, const char *locale)
Definition: pg_locale.c:160
int CountDBConnections(Oid databaseid)
Definition: procarray.c:2788
#define ObjectIdGetDatum(X)
Definition: postgres.h:507
#define ERROR
Definition: elog.h:43
#define FATAL
Definition: elog.h:52
void check_strxfrm_bug(void)
Definition: pg_locale.c:1041
void SetConfigOption(const char *name, const char *value, GucContext context, GucSource source)
Definition: guc.c:7563
bool IsUnderPostmaster
Definition: globals.c:109
int errdetail(const char *fmt,...)
Definition: elog.c:955
bool IsAutoVacuumWorkerProcess(void)
Definition: autovacuum.c:3278
#define ereport(elevel, rest)
Definition: elog.h:141
#define ACL_CONNECT
Definition: parsenodes.h:86
HeapTuple SearchSysCache1(int cacheId, Datum key1)
Definition: syscache.c:1116
void SetDatabaseEncoding(int encoding)
Definition: mbutils.c:940
void ReleaseSysCache(HeapTuple tuple)
Definition: syscache.c:1164
Oid MyDatabaseId
Definition: globals.c:85
#define HeapTupleIsValid(tuple)
Definition: htup.h:78
AclResult pg_database_aclcheck(Oid db_oid, Oid roleid, AclMode mode)
Definition: aclchk.c:4641
const char * GetDatabaseEncodingName(void)
Definition: mbutils.c:1052
const char * name
Definition: encode.c:521
int errmsg(const char *fmt,...)
Definition: elog.c:822
#define elog(elevel,...)
Definition: elog.h:228
#define NameStr(name)
Definition: c.h:616

◆ GetDatabaseTuple()

static HeapTuple GetDatabaseTuple ( const char *  dbname)
static

Definition at line 96 of file postinit.c.

References AccessShareLock, BTEqualStrategyNumber, criticalSharedRelcachesBuilt, CStringGetDatum, DatabaseNameIndexId, heap_copytuple(), HeapTupleIsValid, sort-test::key, ScanKeyInit(), systable_beginscan(), systable_endscan(), systable_getnext(), table_close(), and table_open().

Referenced by InitPostgres().

97 {
98  HeapTuple tuple;
99  Relation relation;
100  SysScanDesc scan;
101  ScanKeyData key[1];
102 
103  /*
104  * form a scan key
105  */
106  ScanKeyInit(&key[0],
107  Anum_pg_database_datname,
108  BTEqualStrategyNumber, F_NAMEEQ,
110 
111  /*
112  * Open pg_database and fetch a tuple. Force heap scan if we haven't yet
113  * built the critical shared relcache entries (i.e., we're starting up
114  * without a shared relcache cache file).
115  */
116  relation = table_open(DatabaseRelationId, AccessShareLock);
117  scan = systable_beginscan(relation, DatabaseNameIndexId,
119  NULL,
120  1, key);
121 
122  tuple = systable_getnext(scan);
123 
124  /* Must copy tuple before releasing buffer */
125  if (HeapTupleIsValid(tuple))
126  tuple = heap_copytuple(tuple);
127 
128  /* all done */
129  systable_endscan(scan);
130  table_close(relation, AccessShareLock);
131 
132  return tuple;
133 }
HeapTuple heap_copytuple(HeapTuple tuple)
Definition: heaptuple.c:680
void table_close(Relation relation, LOCKMODE lockmode)
Definition: table.c:133
void systable_endscan(SysScanDesc sysscan)
Definition: genam.c:525
#define AccessShareLock
Definition: lockdefs.h:36
bool criticalSharedRelcachesBuilt
Definition: relcache.c:141
SysScanDesc systable_beginscan(Relation heapRelation, Oid indexId, bool indexOK, Snapshot snapshot, int nkeys, ScanKey key)
Definition: genam.c:352
HeapTuple systable_getnext(SysScanDesc sysscan)
Definition: genam.c:444
#define CStringGetDatum(X)
Definition: postgres.h:578
#define HeapTupleIsValid(tuple)
Definition: htup.h:78
char * dbname
Definition: streamutil.c:50
#define DatabaseNameIndexId
Definition: indexing.h:144
void ScanKeyInit(ScanKey entry, AttrNumber attributeNumber, StrategyNumber strategy, RegProcedure procedure, Datum argument)
Definition: scankey.c:76
Relation table_open(Oid relationId, LOCKMODE lockmode)
Definition: table.c:39
#define BTEqualStrategyNumber
Definition: stratnum.h:31

◆ GetDatabaseTupleByOid()

static HeapTuple GetDatabaseTupleByOid ( Oid  dboid)
static

Definition at line 139 of file postinit.c.

References AccessShareLock, BTEqualStrategyNumber, criticalSharedRelcachesBuilt, DatabaseOidIndexId, heap_copytuple(), HeapTupleIsValid, sort-test::key, ObjectIdGetDatum, ScanKeyInit(), systable_beginscan(), systable_endscan(), systable_getnext(), table_close(), and table_open().

Referenced by InitPostgres().

140 {
141  HeapTuple tuple;
142  Relation relation;
143  SysScanDesc scan;
144  ScanKeyData key[1];
145 
146  /*
147  * form a scan key
148  */
149  ScanKeyInit(&key[0],
150  Anum_pg_database_oid,
151  BTEqualStrategyNumber, F_OIDEQ,
152  ObjectIdGetDatum(dboid));
153 
154  /*
155  * Open pg_database and fetch a tuple. Force heap scan if we haven't yet
156  * built the critical shared relcache entries (i.e., we're starting up
157  * without a shared relcache cache file).
158  */
159  relation = table_open(DatabaseRelationId, AccessShareLock);
160  scan = systable_beginscan(relation, DatabaseOidIndexId,
162  NULL,
163  1, key);
164 
165  tuple = systable_getnext(scan);
166 
167  /* Must copy tuple before releasing buffer */
168  if (HeapTupleIsValid(tuple))
169  tuple = heap_copytuple(tuple);
170 
171  /* all done */
172  systable_endscan(scan);
173  table_close(relation, AccessShareLock);
174 
175  return tuple;
176 }
HeapTuple heap_copytuple(HeapTuple tuple)
Definition: heaptuple.c:680
void table_close(Relation relation, LOCKMODE lockmode)
Definition: table.c:133
void systable_endscan(SysScanDesc sysscan)
Definition: genam.c:525
#define AccessShareLock
Definition: lockdefs.h:36
bool criticalSharedRelcachesBuilt
Definition: relcache.c:141
SysScanDesc systable_beginscan(Relation heapRelation, Oid indexId, bool indexOK, Snapshot snapshot, int nkeys, ScanKey key)
Definition: genam.c:352
HeapTuple systable_getnext(SysScanDesc sysscan)
Definition: genam.c:444
#define ObjectIdGetDatum(X)
Definition: postgres.h:507
#define DatabaseOidIndexId
Definition: indexing.h:146
#define HeapTupleIsValid(tuple)
Definition: htup.h:78
void ScanKeyInit(ScanKey entry, AttrNumber attributeNumber, StrategyNumber strategy, RegProcedure procedure, Datum argument)
Definition: scankey.c:76
Relation table_open(Oid relationId, LOCKMODE lockmode)
Definition: table.c:39
#define BTEqualStrategyNumber
Definition: stratnum.h:31

◆ IdleInTransactionSessionTimeoutHandler()

static void IdleInTransactionSessionTimeoutHandler ( void  )
static

Definition at line 1236 of file postinit.c.

References IdleInTransactionSessionTimeoutPending, InterruptPending, MyLatch, and SetLatch().

Referenced by InitPostgres().

1237 {
1239  InterruptPending = true;
1240  SetLatch(MyLatch);
1241 }
void SetLatch(Latch *latch)
Definition: latch.c:436
volatile sig_atomic_t IdleInTransactionSessionTimeoutPending
Definition: globals.c:34
volatile sig_atomic_t InterruptPending
Definition: globals.c:30
struct Latch * MyLatch
Definition: globals.c:54

◆ InitCommunication()

static void InitCommunication ( void  )
static

Definition at line 439 of file postinit.c.

References CreateSharedMemoryAndSemaphores(), and IsUnderPostmaster.

Referenced by BaseInit().

440 {
441  /*
442  * initialize shared memory and semaphores appropriately.
443  */
444  if (!IsUnderPostmaster) /* postmaster already did this */
445  {
446  /*
447  * We're running a postgres bootstrap process or a standalone backend,
448  * so we need to set up shmem.
449  */
451  }
452 }
bool IsUnderPostmaster
Definition: globals.c:109
void CreateSharedMemoryAndSemaphores(void)
Definition: ipci.c:94

◆ InitializeMaxBackends()

void InitializeMaxBackends ( void  )

Definition at line 525 of file postinit.c.

References Assert, autovacuum_max_workers, elog, ERROR, MAX_BACKENDS, max_wal_senders, max_worker_processes, MaxBackends, and MaxConnections.

Referenced by AuxiliaryProcessMain(), PostgresMain(), and PostmasterMain().

526 {
527  Assert(MaxBackends == 0);
528 
529  /* the extra unit accounts for the autovacuum launcher */
532 
533  /* internal error because the values were all checked previously */
535  elog(ERROR, "too many backends configured");
536 }
#define ERROR
Definition: elog.h:43
#define MAX_BACKENDS
Definition: postmaster.h:75
int MaxBackends
Definition: globals.c:135
int max_wal_senders
Definition: walsender.c:121
int MaxConnections
Definition: globals.c:132
int autovacuum_max_workers
Definition: autovacuum.c:115
#define Assert(condition)
Definition: c.h:739
#define elog(elevel,...)
Definition: elog.h:228
int max_worker_processes
Definition: globals.c:133

◆ InitPostgres()

void InitPostgres ( const char *  in_dbname,
Oid  dboid,
const char *  username,
Oid  useroid,
char *  out_dbname,
bool  override_allow_connections 
)

Definition at line 589 of file postinit.c.

References am_db_walsender, am_walsender, Assert, before_shmem_exit(), CAC_WAITBACKUP, Port::canAcceptConnections, CheckDeadLockAlert(), CheckMyDatabase(), CommitTransactionCommand(), CreateAuxProcessResourceOwner(), CurrentResourceOwner, PGPROC::databaseId, dbname, DEADLOCK_TIMEOUT, DEBUG3, elog, EnablePortalManager(), ereport, errcode(), errcode_for_file_access(), errdetail(), errhint(), errmsg(), FATAL, GetDatabasePath(), GetDatabaseTuple(), GetDatabaseTupleByOid(), GetSessionUserId(), GETSTRUCT, GetTransactionSnapshot(), GetUserId(), has_rolreplication(), HaveNFreeProcs(), HeapTupleIsValid, IDLE_IN_TRANSACTION_SESSION_TIMEOUT, IdleInTransactionSessionTimeoutHandler(), InitBufferPoolBackend(), InitCatalogCache(), initialize_acl(), InitializeClientEncoding(), InitializeSearchPath(), InitializeSession(), InitializeSessionUserId(), InitializeSessionUserIdStandalone(), InitPlanCache(), InitProcessPhase2(), InvalidateCatalogSnapshot(), InvalidBackendId, IsAutoVacuumLauncherProcess(), IsAutoVacuumWorkerProcess(), IsBackgroundWorker, IsBinaryUpgrade, IsBootstrapProcessingMode, IsUnderPostmaster, LOCK_TIMEOUT, LockSharedObject(), LockTimeoutHandler(), MaxBackends, MyBackendId, MyDatabaseId, MyDatabaseTableSpace, MyProc, MyProcPort, NAMEDATALEN, NameStr, OidIsValid, on_shmem_exit(), PerformAuthentication(), pg_usleep(), pgstat_bestart(), pgstat_initialize(), PostAuthDelay, process_settings(), process_startup_options(), ProcSignalInit(), RecoveryInProgress(), RegisterTimeout(), RelationCacheInitialize(), RelationCacheInitializePhase2(), RelationCacheInitializePhase3(), ReleaseAuxProcessResources(), ReservedBackends, RowExclusiveLock, SetCurrentStatementStartTimestamp(), SetDatabasePath(), SharedInvalBackendInit(), ShutdownPostgres(), ShutdownXLOG(), StartTransactionCommand(), StartupXLOG(), STATEMENT_TIMEOUT, StatementTimeoutHandler(), strlcpy(), superuser(), ThereIsAtLeastOneRole(), ValidatePgVersion(), WARNING, XACT_READ_COMMITTED, and XactIsoLevel.

Referenced by AutoVacLauncherMain(), AutoVacWorkerMain(), BackgroundWorkerInitializeConnection(), BackgroundWorkerInitializeConnectionByOid(), BootstrapModeMain(), and PostgresMain().

591 {
592  bool bootstrap = IsBootstrapProcessingMode();
593  bool am_superuser;
594  char *fullpath;
595  char dbname[NAMEDATALEN];
596 
597  elog(DEBUG3, "InitPostgres");
598 
599  /*
600  * Add my PGPROC struct to the ProcArray.
601  *
602  * Once I have done this, I am visible to other backends!
603  */
605 
606  /*
607  * Initialize my entry in the shared-invalidation manager's array of
608  * per-backend data.
609  *
610  * Sets up MyBackendId, a unique backend identifier.
611  */
613 
614  SharedInvalBackendInit(false);
615 
616  if (MyBackendId > MaxBackends || MyBackendId <= 0)
617  elog(FATAL, "bad backend ID: %d", MyBackendId);
618 
619  /* Now that we have a BackendId, we can participate in ProcSignal */
621 
622  /*
623  * Also set up timeout handlers needed for backend operation. We need
624  * these in every case except bootstrap.
625  */
626  if (!bootstrap)
627  {
633  }
634 
635  /*
636  * bufmgr needs another initialization call too
637  */
639 
640  /*
641  * Initialize local process's access to XLOG.
642  */
643  if (IsUnderPostmaster)
644  {
645  /*
646  * The postmaster already started the XLOG machinery, but we need to
647  * call InitXLOGAccess(), if the system isn't in hot-standby mode.
648  * This is handled by calling RecoveryInProgress and ignoring the
649  * result.
650  */
651  (void) RecoveryInProgress();
652  }
653  else
654  {
655  /*
656  * We are either a bootstrap process or a standalone backend. Either
657  * way, start up the XLOG machinery, and register to have it closed
658  * down at exit.
659  *
660  * We don't yet have an aux-process resource owner, but StartupXLOG
661  * and ShutdownXLOG will need one. Hence, create said resource owner
662  * (and register a callback to clean it up after ShutdownXLOG runs).
663  */
665 
666  StartupXLOG();
667  /* Release (and warn about) any buffer pins leaked in StartupXLOG */
669  /* Reset CurrentResourceOwner to nothing for the moment */
670  CurrentResourceOwner = NULL;
671 
673  }
674 
675  /*
676  * Initialize the relation cache and the system catalog caches. Note that
677  * no catalog access happens here; we only set up the hashtable structure.
678  * We must do this before starting a transaction because transaction abort
679  * would try to touch these hashtables.
680  */
683  InitPlanCache();
684 
685  /* Initialize portal manager */
687 
688  /* Initialize stats collection --- must happen before first xact */
689  if (!bootstrap)
691 
692  /*
693  * Load relcache entries for the shared system catalogs. This must create
694  * at least entries for pg_database and catalogs used for authentication.
695  */
697 
698  /*
699  * Set up process-exit callback to do pre-shutdown cleanup. This is the
700  * first before_shmem_exit callback we register; thus, this will be the
701  * last thing we do before low-level modules like the buffer manager begin
702  * to close down. We need to have this in place before we begin our first
703  * transaction --- if we fail during the initialization transaction, as is
704  * entirely possible, we need the AbortTransaction call to clean up.
705  */
707 
708  /* The autovacuum launcher is done here */
710  {
711  /* report this backend in the PgBackendStatus array */
712  pgstat_bestart();
713 
714  return;
715  }
716 
717  /*
718  * Start a new transaction here before first access to db, and get a
719  * snapshot. We don't have a use for the snapshot itself, but we're
720  * interested in the secondary effect that it sets RecentGlobalXmin. (This
721  * is critical for anything that reads heap pages, because HOT may decide
722  * to prune them even if the process doesn't attempt to modify any
723  * tuples.)
724  */
725  if (!bootstrap)
726  {
727  /* statement_timestamp must be set for timeouts to work correctly */
730 
731  /*
732  * transaction_isolation will have been set to the default by the
733  * above. If the default is "serializable", and we are in hot
734  * standby, we will fail if we don't change it to something lower.
735  * Fortunately, "read committed" is plenty good enough.
736  */
738 
739  (void) GetTransactionSnapshot();
740  }
741 
742  /*
743  * Perform client authentication if necessary, then figure out our
744  * postgres user ID, and see if we are a superuser.
745  *
746  * In standalone mode and in autovacuum worker processes, we use a fixed
747  * ID, otherwise we figure it out from the authenticated user name.
748  */
749  if (bootstrap || IsAutoVacuumWorkerProcess())
750  {
752  am_superuser = true;
753  }
754  else if (!IsUnderPostmaster)
755  {
757  am_superuser = true;
758  if (!ThereIsAtLeastOneRole())
760  (errcode(ERRCODE_UNDEFINED_OBJECT),
761  errmsg("no roles are defined in this database system"),
762  errhint("You should immediately run CREATE USER \"%s\" SUPERUSER;.",
763  username != NULL ? username : "postgres")));
764  }
765  else if (IsBackgroundWorker)
766  {
767  if (username == NULL && !OidIsValid(useroid))
768  {
770  am_superuser = true;
771  }
772  else
773  {
775  am_superuser = superuser();
776  }
777  }
778  else
779  {
780  /* normal multiuser case */
781  Assert(MyProcPort != NULL);
784  am_superuser = superuser();
785  }
786 
787  /*
788  * If we're trying to shut down, only superusers can connect, and new
789  * replication connections are not allowed.
790  */
791  if ((!am_superuser || am_walsender) &&
792  MyProcPort != NULL &&
794  {
795  if (am_walsender)
796  ereport(FATAL,
797  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
798  errmsg("new replication connections are not allowed during database shutdown")));
799  else
800  ereport(FATAL,
801  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
802  errmsg("must be superuser to connect during database shutdown")));
803  }
804 
805  /*
806  * Binary upgrades only allowed super-user connections
807  */
808  if (IsBinaryUpgrade && !am_superuser)
809  {
810  ereport(FATAL,
811  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
812  errmsg("must be superuser to connect in binary upgrade mode")));
813  }
814 
815  /*
816  * The last few connection slots are reserved for superusers. Replication
817  * connections are drawn from slots reserved with max_wal_senders and not
818  * limited by max_connections or superuser_reserved_connections.
819  */
820  if (!am_superuser && !am_walsender &&
821  ReservedBackends > 0 &&
823  ereport(FATAL,
824  (errcode(ERRCODE_TOO_MANY_CONNECTIONS),
825  errmsg("remaining connection slots are reserved for non-replication superuser connections")));
826 
827  /* Check replication permissions needed for walsender processes. */
828  if (am_walsender)
829  {
830  Assert(!bootstrap);
831 
832  if (!superuser() && !has_rolreplication(GetUserId()))
833  ereport(FATAL,
834  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
835  errmsg("must be superuser or replication role to start walsender")));
836  }
837 
838  /*
839  * If this is a plain walsender only supporting physical replication, we
840  * don't want to connect to any particular database. Just finish the
841  * backend startup by processing any options from the startup packet, and
842  * we're done.
843  */
845  {
846  /* process any options passed in the startup packet */
847  if (MyProcPort != NULL)
848  process_startup_options(MyProcPort, am_superuser);
849 
850  /* Apply PostAuthDelay as soon as we've read all options */
851  if (PostAuthDelay > 0)
852  pg_usleep(PostAuthDelay * 1000000L);
853 
854  /* initialize client encoding */
856 
857  /* report this backend in the PgBackendStatus array */
858  pgstat_bestart();
859 
860  /* close the transaction we started above */
862 
863  return;
864  }
865 
866  /*
867  * Set up the global variables holding database id and default tablespace.
868  * But note we won't actually try to touch the database just yet.
869  *
870  * We take a shortcut in the bootstrap case, otherwise we have to look up
871  * the db's entry in pg_database.
872  */
873  if (bootstrap)
874  {
875  MyDatabaseId = TemplateDbOid;
876  MyDatabaseTableSpace = DEFAULTTABLESPACE_OID;
877  }
878  else if (in_dbname != NULL)
879  {
880  HeapTuple tuple;
881  Form_pg_database dbform;
882 
883  tuple = GetDatabaseTuple(in_dbname);
884  if (!HeapTupleIsValid(tuple))
885  ereport(FATAL,
886  (errcode(ERRCODE_UNDEFINED_DATABASE),
887  errmsg("database \"%s\" does not exist", in_dbname)));
888  dbform = (Form_pg_database) GETSTRUCT(tuple);
889  MyDatabaseId = dbform->oid;
890  MyDatabaseTableSpace = dbform->dattablespace;
891  /* take database name from the caller, just for paranoia */
892  strlcpy(dbname, in_dbname, sizeof(dbname));
893  }
894  else if (OidIsValid(dboid))
895  {
896  /* caller specified database by OID */
897  HeapTuple tuple;
898  Form_pg_database dbform;
899 
900  tuple = GetDatabaseTupleByOid(dboid);
901  if (!HeapTupleIsValid(tuple))
902  ereport(FATAL,
903  (errcode(ERRCODE_UNDEFINED_DATABASE),
904  errmsg("database %u does not exist", dboid)));
905  dbform = (Form_pg_database) GETSTRUCT(tuple);
906  MyDatabaseId = dbform->oid;
907  MyDatabaseTableSpace = dbform->dattablespace;
908  Assert(MyDatabaseId == dboid);
909  strlcpy(dbname, NameStr(dbform->datname), sizeof(dbname));
910  /* pass the database name back to the caller */
911  if (out_dbname)
912  strcpy(out_dbname, dbname);
913  }
914  else
915  {
916  /*
917  * If this is a background worker not bound to any particular
918  * database, we're done now. Everything that follows only makes sense
919  * if we are bound to a specific database. We do need to close the
920  * transaction we started before returning.
921  */
922  if (!bootstrap)
923  {
924  pgstat_bestart();
926  }
927  return;
928  }
929 
930  /*
931  * Now, take a writer's lock on the database we are trying to connect to.
932  * If there is a concurrently running DROP DATABASE on that database, this
933  * will block us until it finishes (and has committed its update of
934  * pg_database).
935  *
936  * Note that the lock is not held long, only until the end of this startup
937  * transaction. This is OK since we will advertise our use of the
938  * database in the ProcArray before dropping the lock (in fact, that's the
939  * next thing to do). Anyone trying a DROP DATABASE after this point will
940  * see us in the array once they have the lock. Ordering is important for
941  * this because we don't want to advertise ourselves as being in this
942  * database until we have the lock; otherwise we create what amounts to a
943  * deadlock with CountOtherDBBackends().
944  *
945  * Note: use of RowExclusiveLock here is reasonable because we envision
946  * our session as being a concurrent writer of the database. If we had a
947  * way of declaring a session as being guaranteed-read-only, we could use
948  * AccessShareLock for such sessions and thereby not conflict against
949  * CREATE DATABASE.
950  */
951  if (!bootstrap)
952  LockSharedObject(DatabaseRelationId, MyDatabaseId, 0,
954 
955  /*
956  * Now we can mark our PGPROC entry with the database ID.
957  *
958  * We assume this is an atomic store so no lock is needed; though actually
959  * things would work fine even if it weren't atomic. Anyone searching the
960  * ProcArray for this database's ID should hold the database lock, so they
961  * would not be executing concurrently with this store. A process looking
962  * for another database's ID could in theory see a chance match if it read
963  * a partially-updated databaseId value; but as long as all such searches
964  * wait and retry, as in CountOtherDBBackends(), they will certainly see
965  * the correct value on their next try.
966  */
968 
969  /*
970  * We established a catalog snapshot while reading pg_authid and/or
971  * pg_database; but until we have set up MyDatabaseId, we won't react to
972  * incoming sinval messages for unshared catalogs, so we won't realize it
973  * if the snapshot has been invalidated. Assume it's no good anymore.
974  */
976 
977  /*
978  * Recheck pg_database to make sure the target database hasn't gone away.
979  * If there was a concurrent DROP DATABASE, this ensures we will die
980  * cleanly without creating a mess.
981  */
982  if (!bootstrap)
983  {
984  HeapTuple tuple;
985 
986  tuple = GetDatabaseTuple(dbname);
987  if (!HeapTupleIsValid(tuple) ||
988  MyDatabaseId != ((Form_pg_database) GETSTRUCT(tuple))->oid ||
989  MyDatabaseTableSpace != ((Form_pg_database) GETSTRUCT(tuple))->dattablespace)
990  ereport(FATAL,
991  (errcode(ERRCODE_UNDEFINED_DATABASE),
992  errmsg("database \"%s\" does not exist", dbname),
993  errdetail("It seems to have just been dropped or renamed.")));
994  }
995 
996  /*
997  * Now we should be able to access the database directory safely. Verify
998  * it's there and looks reasonable.
999  */
1001 
1002  if (!bootstrap)
1003  {
1004  if (access(fullpath, F_OK) == -1)
1005  {
1006  if (errno == ENOENT)
1007  ereport(FATAL,
1008  (errcode(ERRCODE_UNDEFINED_DATABASE),
1009  errmsg("database \"%s\" does not exist",
1010  dbname),
1011  errdetail("The database subdirectory \"%s\" is missing.",
1012  fullpath)));
1013  else
1014  ereport(FATAL,
1016  errmsg("could not access directory \"%s\": %m",
1017  fullpath)));
1018  }
1019 
1020  ValidatePgVersion(fullpath);
1021  }
1022 
1023  SetDatabasePath(fullpath);
1024 
1025  /*
1026  * It's now possible to do real access to the system catalogs.
1027  *
1028  * Load relcache entries for the system catalogs. This must create at
1029  * least the minimum set of "nailed-in" cache entries.
1030  */
1032 
1033  /* set up ACL framework (so CheckMyDatabase can check permissions) */
1034  initialize_acl();
1035 
1036  /*
1037  * Re-read the pg_database row for our database, check permissions and set
1038  * up database-specific GUC settings. We can't do this until all the
1039  * database-access infrastructure is up. (Also, it wants to know if the
1040  * user is a superuser, so the above stuff has to happen first.)
1041  */
1042  if (!bootstrap)
1043  CheckMyDatabase(dbname, am_superuser, override_allow_connections);
1044 
1045  /*
1046  * Now process any command-line switches and any additional GUC variable
1047  * settings passed in the startup packet. We couldn't do this before
1048  * because we didn't know if client is a superuser.
1049  */
1050  if (MyProcPort != NULL)
1051  process_startup_options(MyProcPort, am_superuser);
1052 
1053  /* Process pg_db_role_setting options */
1055 
1056  /* Apply PostAuthDelay as soon as we've read all options */
1057  if (PostAuthDelay > 0)
1058  pg_usleep(PostAuthDelay * 1000000L);
1059 
1060  /*
1061  * Initialize various default states that can't be set up until we've
1062  * selected the active user and gotten the right GUC settings.
1063  */
1064 
1065  /* set default namespace search path */
1067 
1068  /* initialize client encoding */
1070 
1071  /* Initialize this backend's session state. */
1073 
1074  /* report this backend in the PgBackendStatus array */
1075  if (!bootstrap)
1076  pgstat_bestart();
1077 
1078  /* close the transaction we started above */
1079  if (!bootstrap)
1081 }
int errhint(const char *fmt,...)
Definition: elog.c:1069
BackendId MyBackendId
Definition: globals.c:81
#define GETSTRUCT(TUP)
Definition: htup_details.h:655
struct Port * MyProcPort
Definition: globals.c:43
CAC_state canAcceptConnections
Definition: libpq-be.h:133
void SharedInvalBackendInit(bool sendOnly)
Definition: sinvaladt.c:257
#define DEBUG3
Definition: elog.h:23
Oid GetUserId(void)
Definition: miscinit.c:380
FormData_pg_database * Form_pg_database
Definition: pg_database.h:81
PGPROC * MyProc
Definition: proc.c:67
static HeapTuple GetDatabaseTuple(const char *dbname)
Definition: postinit.c:96
ResourceOwner CurrentResourceOwner
Definition: resowner.c:142
void CommitTransactionCommand(void)
Definition: xact.c:2898
void ReleaseAuxProcessResources(bool isCommit)
Definition: resowner.c:855
void InitializeSession(void)
Definition: session.c:54
void ValidatePgVersion(const char *path)
Definition: miscinit.c:1454
void RelationCacheInitializePhase2(void)
Definition: relcache.c:3619
static void PerformAuthentication(Port *port)
Definition: postinit.c:185
static void LockTimeoutHandler(void)
Definition: postinit.c:1226
int errcode(int sqlerrcode)
Definition: elog.c:608
bool superuser(void)
Definition: superuser.c:46
void initialize_acl(void)
Definition: acl.c:4681
bool RecoveryInProgress(void)
Definition: xlog.c:7930
Snapshot GetTransactionSnapshot(void)
Definition: snapmgr.c:306
#define OidIsValid(objectId)
Definition: c.h:645
Oid GetSessionUserId(void)
Definition: miscinit.c:414
bool HaveNFreeProcs(int n)
Definition: proc.c:671
static void CheckMyDatabase(const char *name, bool am_superuser, bool override_allow_connections)
Definition: postinit.c:316
bool IsBinaryUpgrade
Definition: globals.c:110
Oid MyDatabaseTableSpace
Definition: globals.c:87
bool IsBackgroundWorker
Definition: globals.c:111
void RelationCacheInitializePhase3(void)
Definition: relcache.c:3678
#define NAMEDATALEN
bool am_walsender
Definition: walsender.c:115
void pg_usleep(long microsec)
Definition: signal.c:53
int ReservedBackends
Definition: postmaster.c:214
#define FATAL
Definition: elog.h:52
void InitializeSearchPath(void)
Definition: namespace.c:4247
int MaxBackends
Definition: globals.c:135
void on_shmem_exit(pg_on_exit_callback function, Datum arg)
Definition: ipc.c:361
bool IsUnderPostmaster
Definition: globals.c:109
#define RowExclusiveLock
Definition: lockdefs.h:38
int errdetail(const char *fmt,...)
Definition: elog.c:955
int errcode_for_file_access(void)
Definition: elog.c:631
static void IdleInTransactionSessionTimeoutHandler(void)
Definition: postinit.c:1236
void before_shmem_exit(pg_on_exit_callback function, Datum arg)
Definition: ipc.c:333
Oid databaseId
Definition: proc.h:114
void pgstat_initialize(void)
Definition: pgstat.c:2808
static bool ThereIsAtLeastOneRole(void)
Definition: postinit.c:1247
void StartupXLOG(void)
Definition: xlog.c:6200
bool IsAutoVacuumWorkerProcess(void)
Definition: autovacuum.c:3278
#define ereport(elevel, rest)
Definition: elog.h:141
void InvalidateCatalogSnapshot(void)
Definition: snapmgr.c:512
char * GetDatabasePath(Oid dbNode, Oid spcNode)
Definition: relpath.c:107
void SetDatabasePath(const char *path)
Definition: miscinit.c:86
#define WARNING
Definition: elog.h:40
void ShutdownXLOG(int code, Datum arg)
Definition: xlog.c:8326
static HeapTuple GetDatabaseTupleByOid(Oid dboid)
Definition: postinit.c:139
#define InvalidBackendId
Definition: backendid.h:23
bool am_db_walsender
Definition: walsender.c:118
Oid MyDatabaseId
Definition: globals.c:85
int PostAuthDelay
Definition: postgres.c:102
void LockSharedObject(Oid classid, Oid objid, uint16 objsubid, LOCKMODE lockmode)
Definition: lmgr.c:1002
void EnablePortalManager(void)
Definition: portalmem.c:104
static void ShutdownPostgres(int code, Datum arg)
Definition: postinit.c:1187
static char * username
Definition: initdb.c:133
size_t strlcpy(char *dst, const char *src, size_t siz)
Definition: strlcpy.c:45
TimeoutId RegisterTimeout(TimeoutId id, timeout_handler_proc handler)
Definition: timeout.c:380
bool IsAutoVacuumLauncherProcess(void)
Definition: autovacuum.c:3272
#define HeapTupleIsValid(tuple)
Definition: htup.h:78
#define Assert(condition)
Definition: c.h:739
void InitializeSessionUserIdStandalone(void)
Definition: miscinit.c:682
void StartTransactionCommand(void)
Definition: xact.c:2797
void CreateAuxProcessResourceOwner(void)
Definition: resowner.c:834
#define XACT_READ_COMMITTED
Definition: xact.h:37
void InitializeSessionUserId(const char *rolename, Oid roleid)
Definition: miscinit.c:579
char * dbname
Definition: streamutil.c:50
static void process_startup_options(Port *port, bool am_superuser)
Definition: postinit.c:1088
int XactIsoLevel
Definition: xact.c:74
bool has_rolreplication(Oid roleid)
Definition: miscinit.c:561
void InitializeClientEncoding(void)
Definition: mbutils.c:274
void InitPlanCache(void)
Definition: plancache.c:127
void InitProcessPhase2(void)
Definition: proc.c:480
#define IsBootstrapProcessingMode()
Definition: miscadmin.h:372
void RelationCacheInitialize(void)
Definition: relcache.c:3582
void ProcSignalInit(int pss_idx)
Definition: procsignal.c:151
void InitCatalogCache(void)
Definition: syscache.c:1010
static void StatementTimeoutHandler(void)
Definition: postinit.c:1204
void SetCurrentStatementStartTimestamp(void)
Definition: xact.c:817
int errmsg(const char *fmt,...)
Definition: elog.c:822
void pgstat_bestart(void)
Definition: pgstat.c:2850
#define elog(elevel,...)
Definition: elog.h:228
#define NameStr(name)
Definition: c.h:616
static void process_settings(Oid databaseid, Oid roleid)
Definition: postinit.c:1153
void CheckDeadLockAlert(void)
Definition: proc.c:1771
void InitBufferPoolBackend(void)
Definition: bufmgr.c:2479

◆ LockTimeoutHandler()

static void LockTimeoutHandler ( void  )
static

Definition at line 1226 of file postinit.c.

References kill, and MyProcPid.

Referenced by InitPostgres().

1227 {
1228 #ifdef HAVE_SETSID
1229  /* try to signal whole process group */
1230  kill(-MyProcPid, SIGINT);
1231 #endif
1232  kill(MyProcPid, SIGINT);
1233 }
int MyProcPid
Definition: globals.c:40
#define kill(pid, sig)
Definition: win32_port.h:426

◆ PerformAuthentication()

static void PerformAuthentication ( Port port)
static

Definition at line 185 of file postinit.c.

References _, ALLOCSET_DEFAULT_SIZES, AllocSetContextCreate, am_walsender, Port::application_name, AuthenticationTimeout, be_tls_get_cipher(), be_tls_get_cipher_bits(), be_tls_get_compression(), be_tls_get_version(), ClientAuthentication(), ClientAuthInProgress, Port::database_name, disable_timeout(), enable_timeout_after(), ereport, errmsg(), FATAL, load_hba(), load_ident(), LOG, Log_connections, PostmasterContext, set_ps_display(), Port::ssl_in_use, STATEMENT_TIMEOUT, TopMemoryContext, and Port::user_name.

Referenced by InitPostgres().

186 {
187  /* This should be set already, but let's make sure */
188  ClientAuthInProgress = true; /* limit visibility of log messages */
189 
190  /*
191  * In EXEC_BACKEND case, we didn't inherit the contents of pg_hba.conf
192  * etcetera from the postmaster, and have to load them ourselves.
193  *
194  * FIXME: [fork/exec] Ugh. Is there a way around this overhead?
195  */
196 #ifdef EXEC_BACKEND
197 
198  /*
199  * load_hba() and load_ident() want to work within the PostmasterContext,
200  * so create that if it doesn't exist (which it won't). We'll delete it
201  * again later, in PostgresMain.
202  */
203  if (PostmasterContext == NULL)
205  "Postmaster",
207 
208  if (!load_hba())
209  {
210  /*
211  * It makes no sense to continue if we fail to load the HBA file,
212  * since there is no way to connect to the database in this case.
213  */
214  ereport(FATAL,
215  (errmsg("could not load pg_hba.conf")));
216  }
217 
218  if (!load_ident())
219  {
220  /*
221  * It is ok to continue if we fail to load the IDENT file, although it
222  * means that you cannot log in using any of the authentication
223  * methods that need a user name mapping. load_ident() already logged
224  * the details of error to the log.
225  */
226  }
227 #endif
228 
229  /*
230  * Set up a timeout in case a buggy or malicious client fails to respond
231  * during authentication. Since we're inside a transaction and might do
232  * database access, we have to use the statement_timeout infrastructure.
233  */
235 
236  /*
237  * Now perform authentication exchange.
238  */
239  ClientAuthentication(port); /* might not return, if failure */
240 
241  /*
242  * Done with authentication. Disable the timeout, and log if needed.
243  */
245 
246  if (Log_connections)
247  {
248  if (am_walsender)
249  {
250 #ifdef USE_SSL
251  if (port->ssl_in_use)
252  ereport(LOG,
253  (port->application_name != NULL
254  ? errmsg("replication connection authorized: user=%s application_name=%s SSL enabled (protocol=%s, cipher=%s, bits=%d, compression=%s)",
255  port->user_name,
256  port->application_name,
257  be_tls_get_version(port),
258  be_tls_get_cipher(port),
260  be_tls_get_compression(port) ? _("on") : _("off"))
261  : errmsg("replication connection authorized: user=%s SSL enabled (protocol=%s, cipher=%s, bits=%d, compression=%s)",
262  port->user_name,
263  be_tls_get_version(port),
264  be_tls_get_cipher(port),
266  be_tls_get_compression(port) ? _("on") : _("off"))));
267  else
268 #endif
269  ereport(LOG,
270  (port->application_name != NULL
271  ? errmsg("replication connection authorized: user=%s application_name=%s",
272  port->user_name,
273  port->application_name)
274  : errmsg("replication connection authorized: user=%s",
275  port->user_name)));
276  }
277  else
278  {
279 #ifdef USE_SSL
280  if (port->ssl_in_use)
281  ereport(LOG,
282  (port->application_name != NULL
283  ? errmsg("connection authorized: user=%s database=%s application_name=%s SSL enabled (protocol=%s, cipher=%s, bits=%d, compression=%s)",
284  port->user_name, port->database_name, port->application_name,
285  be_tls_get_version(port),
286  be_tls_get_cipher(port),
288  be_tls_get_compression(port) ? _("on") : _("off"))
289  : errmsg("connection authorized: user=%s database=%s SSL enabled (protocol=%s, cipher=%s, bits=%d, compression=%s)",
290  port->user_name, port->database_name,
291  be_tls_get_version(port),
292  be_tls_get_cipher(port),
294  be_tls_get_compression(port) ? _("on") : _("off"))));
295  else
296 #endif
297  ereport(LOG,
298  (port->application_name != NULL
299  ? errmsg("connection authorized: user=%s database=%s application_name=%s",
300  port->user_name, port->database_name, port->application_name)
301  : errmsg("connection authorized: user=%s database=%s",
302  port->user_name, port->database_name)));
303  }
304  }
305 
306  set_ps_display("startup", false);
307 
308  ClientAuthInProgress = false; /* client_min_messages is active now */
309 }
#define AllocSetContextCreate
Definition: memutils.h:170
void ClientAuthentication(Port *port)
Definition: auth.c:346
void set_ps_display(const char *activity, bool force)
Definition: ps_status.c:335
bool ssl_in_use
Definition: libpq-be.h:190
#define LOG
Definition: elog.h:26
bool Log_connections
Definition: postmaster.c:242
bool load_ident(void)
Definition: hba.c:2977
int AuthenticationTimeout
Definition: postmaster.c:239
bool ClientAuthInProgress
Definition: postmaster.c:352
bool am_walsender
Definition: walsender.c:115
bool be_tls_get_compression(Port *port)
#define FATAL
Definition: elog.h:52
#define ALLOCSET_DEFAULT_SIZES
Definition: memutils.h:192
bool load_hba(void)
Definition: hba.c:2183
char * user_name
Definition: libpq-be.h:141
#define ereport(elevel, rest)
Definition: elog.h:141
MemoryContext TopMemoryContext
Definition: mcxt.c:44
int be_tls_get_cipher_bits(Port *port)
void enable_timeout_after(TimeoutId id, int delay_ms)
Definition: timeout.c:435
char * application_name
Definition: libpq-be.h:150
const char * be_tls_get_version(Port *port)
int errmsg(const char *fmt,...)
Definition: elog.c:822
const char * be_tls_get_cipher(Port *port)
void disable_timeout(TimeoutId id, bool keep_indicator)
Definition: timeout.c:532
char * database_name
Definition: libpq-be.h:140
#define _(x)
Definition: elog.c:87
MemoryContext PostmasterContext
Definition: mcxt.c:46

◆ pg_split_opts()

void pg_split_opts ( char **  argv,
int *  argcp,
const char *  optstr 
)

Definition at line 466 of file postinit.c.

References appendStringInfoChar(), StringInfoData::data, initStringInfo(), pfree(), pstrdup(), and resetStringInfo().

Referenced by BackendRun(), and process_startup_options().

467 {
468  StringInfoData s;
469 
470  initStringInfo(&s);
471 
472  while (*optstr)
473  {
474  bool last_was_escape = false;
475 
476  resetStringInfo(&s);
477 
478  /* skip over leading space */
479  while (isspace((unsigned char) *optstr))
480  optstr++;
481 
482  if (*optstr == '\0')
483  break;
484 
485  /*
486  * Parse a single option, stopping at the first space, unless it's
487  * escaped.
488  */
489  while (*optstr)
490  {
491  if (isspace((unsigned char) *optstr) && !last_was_escape)
492  break;
493 
494  if (!last_was_escape && *optstr == '\\')
495  last_was_escape = true;
496  else
497  {
498  last_was_escape = false;
499  appendStringInfoChar(&s, *optstr);
500  }
501 
502  optstr++;
503  }
504 
505  /* now store the option in the next argv[] position */
506  argv[(*argcp)++] = pstrdup(s.data);
507  }
508 
509  pfree(s.data);
510 }
char * pstrdup(const char *in)
Definition: mcxt.c:1186
void pfree(void *pointer)
Definition: mcxt.c:1056
void resetStringInfo(StringInfo str)
Definition: stringinfo.c:75
void appendStringInfoChar(StringInfo str, char ch)
Definition: stringinfo.c:188
void initStringInfo(StringInfo str)
Definition: stringinfo.c:59

◆ process_settings()

static void process_settings ( Oid  databaseid,
Oid  roleid 
)
static

Definition at line 1153 of file postinit.c.

References AccessShareLock, ApplySetting(), GetCatalogSnapshot(), InvalidOid, IsUnderPostmaster, PGC_S_DATABASE, PGC_S_DATABASE_USER, PGC_S_GLOBAL, PGC_S_USER, RegisterSnapshot(), table_close(), table_open(), and UnregisterSnapshot().

Referenced by InitPostgres().

1154 {
1155  Relation relsetting;
1156  Snapshot snapshot;
1157 
1158  if (!IsUnderPostmaster)
1159  return;
1160 
1161  relsetting = table_open(DbRoleSettingRelationId, AccessShareLock);
1162 
1163  /* read all the settings under the same snapshot for efficiency */
1164  snapshot = RegisterSnapshot(GetCatalogSnapshot(DbRoleSettingRelationId));
1165 
1166  /* Later settings are ignored if set earlier. */
1167  ApplySetting(snapshot, databaseid, roleid, relsetting, PGC_S_DATABASE_USER);
1168  ApplySetting(snapshot, InvalidOid, roleid, relsetting, PGC_S_USER);
1169  ApplySetting(snapshot, databaseid, InvalidOid, relsetting, PGC_S_DATABASE);
1170  ApplySetting(snapshot, InvalidOid, InvalidOid, relsetting, PGC_S_GLOBAL);
1171 
1172  UnregisterSnapshot(snapshot);
1173  table_close(relsetting, AccessShareLock);
1174 }
void table_close(Relation relation, LOCKMODE lockmode)
Definition: table.c:133
Snapshot RegisterSnapshot(Snapshot snapshot)
Definition: snapmgr.c:865
Snapshot GetCatalogSnapshot(Oid relid)
Definition: snapmgr.c:442
#define AccessShareLock
Definition: lockdefs.h:36
bool IsUnderPostmaster
Definition: globals.c:109
void UnregisterSnapshot(Snapshot snapshot)
Definition: snapmgr.c:907
#define InvalidOid
Definition: postgres_ext.h:36
void ApplySetting(Snapshot snapshot, Oid databaseid, Oid roleid, Relation relsetting, GucSource source)
Relation table_open(Oid relationId, LOCKMODE lockmode)
Definition: table.c:39

◆ process_startup_options()

static void process_startup_options ( Port port,
bool  am_superuser 
)
static

Definition at line 1088 of file postinit.c.

References Assert, av, Port::cmdline_options, Port::guc_options, lfirst, list_head(), lnext(), name, palloc(), pg_split_opts(), PGC_BACKEND, PGC_S_CLIENT, PGC_SU_BACKEND, process_postgres_switches(), SetConfigOption(), and value.

Referenced by InitPostgres().

1089 {
1090  GucContext gucctx;
1091  ListCell *gucopts;
1092 
1093  gucctx = am_superuser ? PGC_SU_BACKEND : PGC_BACKEND;
1094 
1095  /*
1096  * First process any command-line switches that were included in the
1097  * startup packet, if we are in a regular backend.
1098  */
1099  if (port->cmdline_options != NULL)
1100  {
1101  /*
1102  * The maximum possible number of commandline arguments that could
1103  * come from port->cmdline_options is (strlen + 1) / 2; see
1104  * pg_split_opts().
1105  */
1106  char **av;
1107  int maxac;
1108  int ac;
1109 
1110  maxac = 2 + (strlen(port->cmdline_options) + 1) / 2;
1111 
1112  av = (char **) palloc(maxac * sizeof(char *));
1113  ac = 0;
1114 
1115  av[ac++] = "postgres";
1116 
1117  pg_split_opts(av, &ac, port->cmdline_options);
1118 
1119  av[ac] = NULL;
1120 
1121  Assert(ac < maxac);
1122 
1123  (void) process_postgres_switches(ac, av, gucctx, NULL);
1124  }
1125 
1126  /*
1127  * Process any additional GUC variable settings passed in startup packet.
1128  * These are handled exactly like command-line variables.
1129  */
1130  gucopts = list_head(port->guc_options);
1131  while (gucopts)
1132  {
1133  char *name;
1134  char *value;
1135 
1136  name = lfirst(gucopts);
1137  gucopts = lnext(port->guc_options, gucopts);
1138 
1139  value = lfirst(gucopts);
1140  gucopts = lnext(port->guc_options, gucopts);
1141 
1142  SetConfigOption(name, value, gucctx, PGC_S_CLIENT);
1143  }
1144 }
GucContext
Definition: guc.h:68
static ListCell * lnext(const List *l, const ListCell *c)
Definition: pg_list.h:321
static struct @145 value
List * guc_options
Definition: libpq-be.h:143
void SetConfigOption(const char *name, const char *value, GucContext context, GucSource source)
Definition: guc.c:7563
void pg_split_opts(char **argv, int *argcp, const char *optstr)
Definition: postinit.c:466
static ListCell * list_head(const List *l)
Definition: pg_list.h:125
struct @18::@19 av[32]
#define Assert(condition)
Definition: c.h:739
#define lfirst(lc)
Definition: pg_list.h:190
const char * name
Definition: encode.c:521
void * palloc(Size size)
Definition: mcxt.c:949
char * cmdline_options
Definition: libpq-be.h:142
void process_postgres_switches(int argc, char *argv[], GucContext ctx, const char **dbname)
Definition: postgres.c:3494

◆ ShutdownPostgres()

static void ShutdownPostgres ( int  code,
Datum  arg 
)
static

Definition at line 1187 of file postinit.c.

References AbortOutOfAnyTransaction(), LockReleaseAll(), and USER_LOCKMETHOD.

Referenced by InitPostgres().

1188 {
1189  /* Make sure we've killed any active transaction */
1191 
1192  /*
1193  * User locks are not released by transaction end, so be sure to release
1194  * them explicitly.
1195  */
1197 }
void AbortOutOfAnyTransaction(void)
Definition: xact.c:4531
#define USER_LOCKMETHOD
Definition: lock.h:128
void LockReleaseAll(LOCKMETHODID lockmethodid, bool allLocks)
Definition: lock.c:2087

◆ StatementTimeoutHandler()

static void StatementTimeoutHandler ( void  )
static

Definition at line 1204 of file postinit.c.

References ClientAuthInProgress, kill, MyProcPid, and sig.

Referenced by InitPostgres().

1205 {
1206  int sig = SIGINT;
1207 
1208  /*
1209  * During authentication the timeout is used to deal with
1210  * authentication_timeout - we want to quit in response to such timeouts.
1211  */
1213  sig = SIGTERM;
1214 
1215 #ifdef HAVE_SETSID
1216  /* try to signal whole process group */
1217  kill(-MyProcPid, sig);
1218 #endif
1219  kill(MyProcPid, sig);
1220 }
int MyProcPid
Definition: globals.c:40
#define kill(pid, sig)
Definition: win32_port.h:426
bool ClientAuthInProgress
Definition: postmaster.c:352
static int sig
Definition: pg_ctl.c:84

◆ ThereIsAtLeastOneRole()

static bool ThereIsAtLeastOneRole ( void  )
static

Definition at line 1247 of file postinit.c.

References AccessShareLock, ForwardScanDirection, heap_getnext(), table_beginscan_catalog(), table_close(), table_endscan(), and table_open().

Referenced by InitPostgres().

1248 {
1249  Relation pg_authid_rel;
1250  TableScanDesc scan;
1251  bool result;
1252 
1253  pg_authid_rel = table_open(AuthIdRelationId, AccessShareLock);
1254 
1255  scan = table_beginscan_catalog(pg_authid_rel, 0, NULL);
1256  result = (heap_getnext(scan, ForwardScanDirection) != NULL);
1257 
1258  table_endscan(scan);
1259  table_close(pg_authid_rel, AccessShareLock);
1260 
1261  return result;
1262 }
void table_close(Relation relation, LOCKMODE lockmode)
Definition: table.c:133
TableScanDesc table_beginscan_catalog(Relation relation, int nkeys, struct ScanKeyData *key)
Definition: tableam.c:98
#define AccessShareLock
Definition: lockdefs.h:36
HeapTuple heap_getnext(TableScanDesc sscan, ScanDirection direction)
Definition: heapam.c:1290
static void table_endscan(TableScanDesc scan)
Definition: tableam.h:849
Relation table_open(Oid relationId, LOCKMODE lockmode)
Definition: table.c:39