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ebb0a20149
that search loops only have to scan that far and not through all maxBackends entries. This eliminates a performance penalty for setting maxBackends much higher than the average number of active backends. Also, eliminate no-longer-used 'backend tag' concept. Remove setting of environment variables at backend start (except for CYR_RECODE), since none of them are being examined by the backend any longer.
236 lines
6.9 KiB
C
236 lines
6.9 KiB
C
/*-------------------------------------------------------------------------
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*
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* miscadmin.h
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* this file contains general postgres administration and initialization
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* stuff that used to be spread out between the following files:
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* globals.h global variables
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* pdir.h directory path crud
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* pinit.h postgres initialization
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* pmod.h processing modes
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*
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*
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* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $Id: miscadmin.h,v 1.70 2000/11/12 20:51:52 tgl Exp $
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*
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* NOTES
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* some of the information in this file will be moved to
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* other files.
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef MISCADMIN_H
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#define MISCADMIN_H
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#include <sys/types.h> /* For pid_t */
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#include "postgres.h"
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#include "storage/ipc.h"
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/*****************************************************************************
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* globals.h -- *
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*****************************************************************************/
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/*
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* from postmaster/postmaster.c
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*/
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extern int PostmasterMain(int argc, char *argv[]);
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/*
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* from utils/init/globals.c
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*/
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extern bool Noversion;
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extern bool Quiet;
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extern bool QueryCancel;
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extern char *DataDir;
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extern int MyProcPid;
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extern struct Port *MyProcPort;
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extern long MyCancelKey;
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extern char OutputFileName[];
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/*
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* done in storage/backendid.h for now.
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*
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* extern BackendId MyBackendId;
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*/
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extern bool MyDatabaseIdIsInitialized;
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extern Oid MyDatabaseId;
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extern bool TransactionInitWasProcessed;
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extern bool IsUnderPostmaster;
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extern int DebugLvl;
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/* Date/Time Configuration
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*
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* Constants to pass info from runtime environment:
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* USE_POSTGRES_DATES specifies traditional postgres format for output.
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* USE_ISO_DATES specifies ISO-compliant format for output.
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* USE_SQL_DATES specified Oracle/Ingres-compliant format for output.
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* USE_GERMAN_DATES specifies German-style dd.mm/yyyy date format.
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*
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* DateStyle specifies preference for date formatting for output.
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* EuroDates if client prefers dates interpreted and written w/European conventions.
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*
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* HasCTZSet if client timezone is specified by client.
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* CDayLight is the apparent daylight savings time status.
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* CTimeZone is the timezone offset in seconds.
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* CTZName is the timezone label.
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*/
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#define MAXTZLEN 10 /* max TZ name len, not counting tr. null */
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#define USE_POSTGRES_DATES 0
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#define USE_ISO_DATES 1
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#define USE_SQL_DATES 2
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#define USE_GERMAN_DATES 3
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extern int DateStyle;
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extern bool EuroDates;
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extern bool HasCTZSet;
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extern bool CDayLight;
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extern int CTimeZone;
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extern char CTZName[];
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extern char FloatFormat[];
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extern char DateFormat[];
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extern bool enableFsync;
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extern bool allowSystemTableMods;
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extern int SortMem;
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/* a few postmaster startup options are exported here so the
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configuration file processor has access to them */
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extern bool NetServer;
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extern bool EnableSSL;
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extern bool SilentMode;
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extern int MaxBackends;
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extern int NBuffers;
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extern int PostPortName;
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/*****************************************************************************
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* pdir.h -- *
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* POSTGRES directory path definitions. *
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*****************************************************************************/
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extern char *DatabaseName;
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extern char *DatabasePath;
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/* in utils/misc/database.c */
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extern void GetRawDatabaseInfo(const char *name, Oid *db_id, char *path);
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extern char *ExpandDatabasePath(const char *path);
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/* now in utils/init/miscinit.c */
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extern void SetDatabaseName(const char *name);
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extern void SetDatabasePath(const char *path);
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extern char *GetUserName(Oid userid);
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extern Oid GetUserId(void);
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extern void SetUserId(Oid userid);
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extern Oid GetSessionUserId(void);
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extern void SetSessionUserId(Oid userid);
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extern void SetSessionUserIdFromUserName(const char *username);
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extern void SetDataDir(const char *dir);
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extern int FindExec(char *full_path, const char *argv0, const char *binary_name);
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extern int CheckPathAccess(char *path, char *name, int open_mode);
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/*****************************************************************************
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* pmod.h -- *
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* POSTGRES processing mode definitions. *
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*****************************************************************************/
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/*
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* Description:
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* There are three processing modes in POSTGRES. They are
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* "BootstrapProcessing or "bootstrap," InitProcessing or
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* "initialization," and NormalProcessing or "normal."
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*
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* The first two processing modes are used during special times. When the
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* system state indicates bootstrap processing, transactions are all given
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* transaction id "one" and are consequently guarenteed to commit. This mode
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* is used during the initial generation of template databases.
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*
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* Initialization mode until all normal initialization is complete.
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* Some code behaves differently when executed in this mode to enable
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* system bootstrapping.
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*
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* If a POSTGRES binary is in normal mode, then all code may be executed
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* normally.
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*/
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typedef enum ProcessingMode
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{
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BootstrapProcessing, /* bootstrap creation of template database */
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InitProcessing, /* initializing system */
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NormalProcessing /* normal processing */
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} ProcessingMode;
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/*****************************************************************************
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* pinit.h -- *
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* POSTGRES initialization and cleanup definitions. *
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*****************************************************************************/
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/*
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* Note:
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* XXX AddExitHandler not defined yet.
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*/
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typedef int16 ExitStatus;
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#define NormalExitStatus (0)
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#define FatalExitStatus (127)
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/* XXX are there any other meaningful exit codes? */
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/* in utils/init/postinit.c */
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extern int lockingOff;
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extern void InitPostgres(const char *dbname, const char *username);
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extern void BaseInit(void);
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/* one of the ways to get out of here */
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#define ExitPostgres(status) proc_exec(status)
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/* processing mode support stuff */
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extern ProcessingMode Mode;
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#define IsBootstrapProcessingMode() ((bool)(Mode == BootstrapProcessing))
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#define IsInitProcessingMode() ((bool)(Mode == InitProcessing))
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#define IsNormalProcessingMode() ((bool)(Mode == NormalProcessing))
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#define SetProcessingMode(mode) \
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do { \
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AssertArg(mode == BootstrapProcessing || mode == InitProcessing || \
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mode == NormalProcessing); \
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Mode = mode; \
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} while(0)
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#define GetProcessingMode() Mode
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extern void IgnoreSystemIndexes(bool mode);
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extern bool IsIgnoringSystemIndexes(void);
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extern bool IsCacheInitialized(void);
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extern void SetWaitingForLock(bool);
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/*
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* "postmaster.pid" is a file containing postmaster's pid, being
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* created uder $PGDATA upon postmaster's starting up. When postmaster
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* shuts down, it will be unlinked.
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*/
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#define PIDFNAME "postmaster.pid"
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extern void SetPidFname(char *datadir);
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extern void UnlinkPidFile(void);
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extern int SetPidFile(pid_t pid);
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extern void ValidatePgVersion(const char *path);
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#endif /* MISCADMIN_H */
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