diff options
Diffstat (limited to 'src/backend/utils/init/postinit.c')
| -rw-r--r-- | src/backend/utils/init/postinit.c | 1064 |
1 files changed, 546 insertions, 518 deletions
diff --git a/src/backend/utils/init/postinit.c b/src/backend/utils/init/postinit.c index fb21e51a492..5a8a1a83d4d 100644 --- a/src/backend/utils/init/postinit.c +++ b/src/backend/utils/init/postinit.c @@ -1,28 +1,28 @@ /*------------------------------------------------------------------------- * * postinit.c-- - * postgres initialization utilities + * postgres initialization utilities * * Copyright (c) 1994, Regents of the University of California * * * IDENTIFICATION - * $Header: /cvsroot/pgsql/src/backend/utils/init/postinit.c,v 1.12 1997/08/27 03:48:39 momjian Exp $ + * $Header: /cvsroot/pgsql/src/backend/utils/init/postinit.c,v 1.13 1997/09/07 04:53:50 momjian Exp $ * * NOTES - * InitPostgres() is the function called from PostgresMain - * which does all non-trival initialization, mainly by calling - * all the other initialization functions. InitPostgres() - * is only used within the "postgres" backend and so that routine - * is in tcop/postgres.c InitPostgres() is needed in cinterface.a - * because things like the bootstrap backend program need it. Hence - * you find that in this file... + * InitPostgres() is the function called from PostgresMain + * which does all non-trival initialization, mainly by calling + * all the other initialization functions. InitPostgres() + * is only used within the "postgres" backend and so that routine + * is in tcop/postgres.c InitPostgres() is needed in cinterface.a + * because things like the bootstrap backend program need it. Hence + * you find that in this file... * - * If you feel the need to add more initialization code, it should be - * done in InitPostgres() or someplace lower. Do not start - * putting stuff in PostgresMain - if you do then someone - * will have to clean it up later, and it's not going to be me! - * -cim 10/3/90 + * If you feel the need to add more initialization code, it should be + * done in InitPostgres() or someplace lower. Do not start + * putting stuff in PostgresMain - if you do then someone + * will have to clean it up later, and it's not going to be me! + * -cim 10/3/90 * *------------------------------------------------------------------------- */ @@ -47,22 +47,22 @@ #include "access/heapam.h" #include "access/xact.h" #include "storage/bufmgr.h" -#include "access/transam.h" /* XXX dependency problem */ +#include "access/transam.h" /* XXX dependency problem */ #include "utils/tqual.h" #include "utils/syscache.h" -#include "storage/bufpage.h" /* for page layout, for InitMyDatabaseId() */ +#include "storage/bufpage.h" /* for page layout, for InitMyDatabaseId() */ #include "storage/sinval.h" #include "storage/sinvaladt.h" #include "storage/lmgr.h" -#include "miscadmin.h" /* for global decls */ -#include "utils/portal.h" /* for EnablePortalManager, etc. */ +#include "miscadmin.h" /* for global decls */ +#include "utils/portal.h" /* for EnablePortalManager, etc. */ -#include "utils/exc.h" /* for EnableExceptionHandling, etc. */ -#include "fmgr.h" /* for EnableDynamicFunctionManager, etc. */ +#include "utils/exc.h" /* for EnableExceptionHandling, etc. */ +#include "fmgr.h" /* for EnableDynamicFunctionManager, etc. */ #include "utils/elog.h" #include "utils/palloc.h" -#include "utils/mcxt.h" /* for EnableMemoryContext, etc. */ +#include "utils/mcxt.h" /* for EnableMemoryContext, etc. */ #include "catalog/catname.h" #include "catalog/pg_database.h" @@ -70,584 +70,612 @@ #include "port-protos.h" #include "libpq/libpq-be.h" -static void InitCommunication(void); -static void InitMyDatabaseId(void); -static void InitStdio(void); -static void InitUserid(void); +static void InitCommunication(void); +static void InitMyDatabaseId(void); +static void InitStdio(void); +static void InitUserid(void); -static IPCKey PostgresIpcKey; +static IPCKey PostgresIpcKey; /* ---------------------------------------------------------------- - * InitPostgres support + * InitPostgres support * ---------------------------------------------------------------- */ /* -------------------------------- - * InitMyDatabaseId() -- Find and record the OID of the database we are - * to open. + * InitMyDatabaseId() -- Find and record the OID of the database we are + * to open. * - * The database's oid forms half of the unique key for the system - * caches and lock tables. We therefore want it initialized before - * we open any relations, since opening relations puts things in the - * cache. To get around this problem, this code opens and scans the - * pg_database relation by hand. + * The database's oid forms half of the unique key for the system + * caches and lock tables. We therefore want it initialized before + * we open any relations, since opening relations puts things in the + * cache. To get around this problem, this code opens and scans the + * pg_database relation by hand. * - * This algorithm relies on the fact that first attribute in the - * pg_database relation schema is the database name. It also knows - * about the internal format of tuples on disk and the length of - * the datname attribute. It knows the location of the pg_database - * file. + * This algorithm relies on the fact that first attribute in the + * pg_database relation schema is the database name. It also knows + * about the internal format of tuples on disk and the length of + * the datname attribute. It knows the location of the pg_database + * file. * - * This code is called from InitDatabase(), after we chdir() to the - * database directory but before we open any relations. + * This code is called from InitDatabase(), after we chdir() to the + * database directory but before we open any relations. * -------------------------------- */ static void InitMyDatabaseId() { - int dbfd; - int fileflags; - int nbytes; - int max, i; - HeapTuple tup; - Page pg; - PageHeader ph; - char *dbfname; - Form_pg_database tup_db; - - /* - * At bootstrap time, we don't need to check the oid of the database - * in use, since we're not using shared memory. This is lucky, since - * the database may not be in the tables yet. - */ - - if (IsBootstrapProcessingMode()) { - LockDisable(true); - return; - } - - dbfname = (char *) palloc(strlen(DataDir) + strlen("pg_database") + 2); - sprintf(dbfname, "%s%cpg_database", DataDir, SEP_CHAR); - fileflags = O_RDONLY; - - if ((dbfd = open(dbfname, O_RDONLY, 0)) < 0) - elog(FATAL, "Cannot open %s", dbfname); - - pfree(dbfname); - - /* ---------------- - * read and examine every page in pg_database - * - * Raw I/O! Read those tuples the hard way! Yow! - * - * Why don't we use the access methods or move this code - * someplace else? This is really pg_database schema dependent - * code. Perhaps it should go in lib/catalog/pg_database? - * -cim 10/3/90 - * - * mao replies 4 apr 91: yeah, maybe this should be moved to - * lib/catalog. however, we CANNOT use the access methods since - * those use the buffer cache, which uses the relation cache, which - * requires that the dbid be set, which is what we're trying to do - * here. - * ---------------- - */ - pg = (Page) palloc(BLCKSZ); - ph = (PageHeader) pg; - - while ((nbytes = read(dbfd, pg, BLCKSZ)) == BLCKSZ) { - max = PageGetMaxOffsetNumber(pg); - - /* look at each tuple on the page */ - for (i = 0; i <= max; i++) { - int offset; - - /* if it's a freed tuple, ignore it */ - if (!(ph->pd_linp[i].lp_flags & LP_USED)) - continue; - - /* get a pointer to the tuple itself */ - offset = (int) ph->pd_linp[i].lp_off; - tup = (HeapTuple) (((char *) pg) + offset); - - /* - * if the tuple has been deleted (the database was destroyed), - * skip this tuple. XXX warning, will robinson: violation of - * transaction semantics happens right here. we should check - * to be sure that the xact that deleted this tuple actually - * committed. only way to do this at init time is to paw over - * the log relation by hand, too. let's be optimistic. - * - * XXX This is an evil type cast. tup->t_xmax is char[5] while - * TransactionId is struct * { char data[5] }. It works but - * if data is ever moved and no longer the first field this - * will be broken!! -mer 11 Nov 1991. - */ - if (TransactionIdIsValid((TransactionId)tup->t_xmax)) - continue; - - /* - * Okay, see if this is the one we want. - * XXX 1 july 91: mao and mer discover that tuples now squash - * t_bits. Why is this? - * - * 24 july 92: mer realizes that the t_bits field is only - * used in the event of null values. If no - * fields are null we reduce the header size - * by doing the squash. t_hoff tells you exactly - * how big the header actually is. use the PC - * means of getting at sys cat attrs. - */ - tup_db = (Form_pg_database)GETSTRUCT(tup); - - if (strncmp(GetDatabaseName(), - &(tup_db->datname.data[0]), - 16) == 0) - { - MyDatabaseId = tup->t_oid; - goto done; - } - } - } - - done: - close(dbfd); - pfree(pg); - - if (!OidIsValid(MyDatabaseId)) - elog(FATAL, - "Database %s does not exist in %s", - GetDatabaseName(), - DatabaseRelationName); + int dbfd; + int fileflags; + int nbytes; + int max, + i; + HeapTuple tup; + Page pg; + PageHeader ph; + char *dbfname; + Form_pg_database tup_db; + + /* + * At bootstrap time, we don't need to check the oid of the database + * in use, since we're not using shared memory. This is lucky, since + * the database may not be in the tables yet. + */ + + if (IsBootstrapProcessingMode()) + { + LockDisable(true); + return; + } + + dbfname = (char *) palloc(strlen(DataDir) + strlen("pg_database") + 2); + sprintf(dbfname, "%s%cpg_database", DataDir, SEP_CHAR); + fileflags = O_RDONLY; + + if ((dbfd = open(dbfname, O_RDONLY, 0)) < 0) + elog(FATAL, "Cannot open %s", dbfname); + + pfree(dbfname); + + /* ---------------- + * read and examine every page in pg_database + * + * Raw I/O! Read those tuples the hard way! Yow! + * + * Why don't we use the access methods or move this code + * someplace else? This is really pg_database schema dependent + * code. Perhaps it should go in lib/catalog/pg_database? + * -cim 10/3/90 + * + * mao replies 4 apr 91: yeah, maybe this should be moved to + * lib/catalog. however, we CANNOT use the access methods since + * those use the buffer cache, which uses the relation cache, which + * requires that the dbid be set, which is what we're trying to do + * here. + * ---------------- + */ + pg = (Page) palloc(BLCKSZ); + ph = (PageHeader) pg; + + while ((nbytes = read(dbfd, pg, BLCKSZ)) == BLCKSZ) + { + max = PageGetMaxOffsetNumber(pg); + + /* look at each tuple on the page */ + for (i = 0; i <= max; i++) + { + int offset; + + /* if it's a freed tuple, ignore it */ + if (!(ph->pd_linp[i].lp_flags & LP_USED)) + continue; + + /* get a pointer to the tuple itself */ + offset = (int) ph->pd_linp[i].lp_off; + tup = (HeapTuple) (((char *) pg) + offset); + + /* + * if the tuple has been deleted (the database was destroyed), + * skip this tuple. XXX warning, will robinson: violation of + * transaction semantics happens right here. we should check + * to be sure that the xact that deleted this tuple actually + * committed. only way to do this at init time is to paw over + * the log relation by hand, too. let's be optimistic. + * + * XXX This is an evil type cast. tup->t_xmax is char[5] while + * TransactionId is struct * { char data[5] }. It works but + * if data is ever moved and no longer the first field this + * will be broken!! -mer 11 Nov 1991. + */ + if (TransactionIdIsValid((TransactionId) tup->t_xmax)) + continue; + + /* + * Okay, see if this is the one we want. XXX 1 july 91: mao + * and mer discover that tuples now squash t_bits. Why is + * this? + * + * 24 july 92: mer realizes that the t_bits field is only used + * in the event of null values. If no fields are null we + * reduce the header size by doing the squash. t_hoff tells + * you exactly how big the header actually is. use the PC + * means of getting at sys cat attrs. + */ + tup_db = (Form_pg_database) GETSTRUCT(tup); + + if (strncmp(GetDatabaseName(), + &(tup_db->datname.data[0]), + 16) == 0) + { + MyDatabaseId = tup->t_oid; + goto done; + } + } + } + +done: + close(dbfd); + pfree(pg); + + if (!OidIsValid(MyDatabaseId)) + elog(FATAL, + "Database %s does not exist in %s", + GetDatabaseName(), + DatabaseRelationName); } /* * DoChdirAndInitDatabaseNameAndPath -- - * Set current directory to the database directory for the database - * named <name>. - * Also set global variables DatabasePath and DatabaseName to those - * values. Also check for proper version of database system and - * database. Exit program via elog() if anything doesn't check out. + * Set current directory to the database directory for the database + * named <name>. + * Also set global variables DatabasePath and DatabaseName to those + * values. Also check for proper version of database system and + * database. Exit program via elog() if anything doesn't check out. * * Arguments: - * Path and name are invalid if it invalid as a string. - * Path is "badly formated" if it is not a string containing a path - * to a writable directory. - * Name is "badly formated" if it contains more than 16 characters or if - * it is a bad file name (e.g., it contains a '/' or an 8-bit character). + * Path and name are invalid if it invalid as a string. + * Path is "badly formated" if it is not a string containing a path + * to a writable directory. + * Name is "badly formated" if it contains more than 16 characters or if + * it is a bad file name (e.g., it contains a '/' or an 8-bit character). * * Exceptions: - * BadState if called more than once. - * BadArg if both path and name are "badly formated" or invalid. - * BadArg if path and name are both "inconsistent" and valid. + * BadState if called more than once. + * BadArg if both path and name are "badly formated" or invalid. + * BadArg if path and name are both "inconsistent" and valid. * - * This routine is inappropriate in bootstrap mode, since the directories - * and version files need not exist yet if we're in bootstrap mode. + * This routine is inappropriate in bootstrap mode, since the directories + * and version files need not exist yet if we're in bootstrap mode. */ static void -DoChdirAndInitDatabaseNameAndPath(char *name) { - char *reason; - /* Failure reason returned by some function. NULL if no failure */ - int fd; - char errormsg[1000]; - - if ((fd = open(DataDir, O_RDONLY,0)) == -1) - sprintf(errormsg, "Database system does not exist. " - "PGDATA directory '%s' not found. Normally, you " - "create a database system by running initdb.", - DataDir); - else { - char myPath[MAXPGPATH]; /* DatabasePath points here! */ - - close(fd); - if (strlen(DataDir) + strlen(name) + 10 > sizeof(myPath)) - sprintf(errormsg, "Internal error in postinit.c: database " - "pathname exceeds maximum allowable length."); - else { - sprintf(myPath, "%s/base/%s", DataDir, name); - - if ((fd = open(myPath, O_RDONLY,0)) == -1) - sprintf(errormsg, - "Database '%s' does not exist. " - "(We know this because the directory '%s' " - "does not exist). You can create a database " - "with the SQL command CREATE DATABASE. To see " - "what databases exist, look at the subdirectories " - "of '%s/base/'.", - name, myPath, DataDir); - else { - close(fd); - ValidatePgVersion(DataDir, &reason); - if (reason != NULL) - sprintf(errormsg, - "InitPostgres could not validate that the database " - "system version is compatible with this level of " - "Postgres. You may need to run initdb to create " - "a new database system. %s", - reason); - else { - ValidatePgVersion(myPath, &reason); - if (reason != NULL) - sprintf(errormsg, - "InitPostgres could not validate that the " - "database version is compatible with this level " - "of Postgres, even though the database system " - "as a whole appears to be at a compatible level. " - "You may need to recreate the database with SQL " - "commands DROP DATABASE and CREATE DATABASE. " - "%s", - reason); - else { - /* The directories and PG_VERSION files are in order.*/ - int rc; /* return code from some function we call */ - - SetDatabasePath(myPath); - SetDatabaseName(name); - rc = chdir(myPath); - if (rc < 0) - sprintf(errormsg, - "InitPostgres unable to change " - "current directory to '%s', errno = %s (%d).", - myPath, strerror(errno), errno); - else errormsg[0] = '\0'; - } - } - } - } - } - if (errormsg[0] != '\0') - elog(FATAL, errormsg); - /* Above does not return */ +DoChdirAndInitDatabaseNameAndPath(char *name) +{ + char *reason; + + /* Failure reason returned by some function. NULL if no failure */ + int fd; + char errormsg[1000]; + + if ((fd = open(DataDir, O_RDONLY, 0)) == -1) + sprintf(errormsg, "Database system does not exist. " + "PGDATA directory '%s' not found. Normally, you " + "create a database system by running initdb.", + DataDir); + else + { + char myPath[MAXPGPATH]; /* DatabasePath points + * here! */ + + close(fd); + if (strlen(DataDir) + strlen(name) + 10 > sizeof(myPath)) + sprintf(errormsg, "Internal error in postinit.c: database " + "pathname exceeds maximum allowable length."); + else + { + sprintf(myPath, "%s/base/%s", DataDir, name); + + if ((fd = open(myPath, O_RDONLY, 0)) == -1) + sprintf(errormsg, + "Database '%s' does not exist. " + "(We know this because the directory '%s' " + "does not exist). You can create a database " + "with the SQL command CREATE DATABASE. To see " + "what databases exist, look at the subdirectories " + "of '%s/base/'.", + name, myPath, DataDir); + else + { + close(fd); + ValidatePgVersion(DataDir, &reason); + if (reason != NULL) + sprintf(errormsg, + "InitPostgres could not validate that the database " + "system version is compatible with this level of " + "Postgres. You may need to run initdb to create " + "a new database system. %s", + reason); + else + { + ValidatePgVersion(myPath, &reason); + if (reason != NULL) + sprintf(errormsg, + "InitPostgres could not validate that the " + "database version is compatible with this level " + "of Postgres, even though the database system " + "as a whole appears to be at a compatible level. " + "You may need to recreate the database with SQL " + "commands DROP DATABASE and CREATE DATABASE. " + "%s", + reason); + else + { + + /* + * The directories and PG_VERSION files are in + * order. + */ + int rc; /* return code from some + * function we call */ + + SetDatabasePath(myPath); + SetDatabaseName(name); + rc = chdir(myPath); + if (rc < 0) + sprintf(errormsg, + "InitPostgres unable to change " + "current directory to '%s', errno = %s (%d).", + myPath, strerror(errno), errno); + else + errormsg[0] = '\0'; + } + } + } + } + } + if (errormsg[0] != '\0') + elog(FATAL, errormsg); + /* Above does not return */ } /* -------------------------------- - * InitUserid + * InitUserid * - * initializes crap associated with the user id. + * initializes crap associated with the user id. * -------------------------------- */ static void InitUserid() { - setuid(geteuid()); - SetUserId(); + setuid(geteuid()); + SetUserId(); } /* -------------------------------- - * InitCommunication + * InitCommunication * - * This routine initializes stuff needed for ipc, locking, etc. - * it should be called something more informative. + * This routine initializes stuff needed for ipc, locking, etc. + * it should be called something more informative. * * Note: - * This does not set MyBackendId. MyBackendTag is set, however. + * This does not set MyBackendId. MyBackendTag is set, however. * -------------------------------- */ static void InitCommunication() { - char *postid; - char *postport; - IPCKey key = 0; - - /* ---------------- - * try and get the backend tag from POSTID - * ---------------- - */ - MyBackendId = -1; - - postid = getenv("POSTID"); - if (!PointerIsValid(postid)) { - MyBackendTag = -1; - } else { - MyBackendTag = atoi(postid); - Assert(MyBackendTag >= 0); - } - - /* ---------------- - * try and get the ipc key from POSTPORT - * ---------------- - */ - postport = getenv("POSTPORT"); - - if (PointerIsValid(postport)) { - SystemPortAddress address = atoi(postport); - - if (address == 0) - elog(FATAL, "InitCommunication: invalid POSTPORT"); - - if (MyBackendTag == -1) - elog(FATAL, "InitCommunication: missing POSTID"); - - key = SystemPortAddressCreateIPCKey(address); - - /* - * Enable this if you are trying to force the backend to run as if it - * is running under the postmaster. - * - * This goto forces Postgres to attach to shared memory instead of - * using malloc'ed memory (which is the normal behavior if run - * directly). - * - * To enable emulation, run the following shell commands (in addition - * to enabling this goto) - * - * % setenv POSTID 1 - * % setenv POSTPORT 4321 - * % postmaster & - * % kill -9 %1 - * - * Upon doing this, Postmaster will have allocated the shared memory - * resources that Postgres will attach to if you enable - * EMULATE_UNDER_POSTMASTER. - * - * This comment may well age with time - it is current as of - * 8 January 1990 - * - * Greg - */ - + char *postid; + char *postport; + IPCKey key = 0; + + /* ---------------- + * try and get the backend tag from POSTID + * ---------------- + */ + MyBackendId = -1; + + postid = getenv("POSTID"); + if (!PointerIsValid(postid)) + { + MyBackendTag = -1; + } + else + { + MyBackendTag = atoi(postid); + Assert(MyBackendTag >= 0); + } + + /* ---------------- + * try and get the ipc key from POSTPORT + * ---------------- + */ + postport = getenv("POSTPORT"); + + if (PointerIsValid(postport)) + { + SystemPortAddress address = atoi(postport); + + if (address == 0) + elog(FATAL, "InitCommunication: invalid POSTPORT"); + + if (MyBackendTag == -1) + elog(FATAL, "InitCommunication: missing POSTID"); + + key = SystemPortAddressCreateIPCKey(address); + + /* + * Enable this if you are trying to force the backend to run as if + * it is running under the postmaster. + * + * This goto forces Postgres to attach to shared memory instead of + * using malloc'ed memory (which is the normal behavior if run + * directly). + * + * To enable emulation, run the following shell commands (in addition + * to enabling this goto) + * + * % setenv POSTID 1 % setenv POSTPORT 4321 % postmaster & % kill -9 + * %1 + * + * Upon doing this, Postmaster will have allocated the shared memory + * resources that Postgres will attach to if you enable + * EMULATE_UNDER_POSTMASTER. + * + * This comment may well age with time - it is current as of 8 + * January 1990 + * + * Greg + */ + #ifdef EMULATE_UNDER_POSTMASTER - - goto forcesharedmemory; - + + goto forcesharedmemory; + #endif - - } else if (IsUnderPostmaster) { - elog(FATAL, - "InitCommunication: under postmaster and POSTPORT not set"); - } else { - /* ---------------- - * assume we're running a postgres backend by itself with - * no front end or postmaster. - * ---------------- - */ - if (MyBackendTag == -1) { - MyBackendTag = 1; - } - - key = PrivateIPCKey; - } - - /* ---------------- - * initialize shared memory and semaphores appropriately. - * ---------------- - */ + + } + else if (IsUnderPostmaster) + { + elog(FATAL, + "InitCommunication: under postmaster and POSTPORT not set"); + } + else + { + /* ---------------- + * assume we're running a postgres backend by itself with + * no front end or postmaster. + * ---------------- + */ + if (MyBackendTag == -1) + { + MyBackendTag = 1; + } + + key = PrivateIPCKey; + } + + /* ---------------- + * initialize shared memory and semaphores appropriately. + * ---------------- + */ #ifdef EMULATE_UNDER_POSTMASTER - - forcesharedmemory: - + +forcesharedmemory: + #endif - - PostgresIpcKey = key; - AttachSharedMemoryAndSemaphores(key); + + PostgresIpcKey = key; + AttachSharedMemoryAndSemaphores(key); } /* -------------------------------- - * InitStdio + * InitStdio * - * this routine consists of a bunch of code fragments - * that used to be randomly scattered through cinit(). - * they all seem to do stuff associated with io. + * this routine consists of a bunch of code fragments + * that used to be randomly scattered through cinit(). + * they all seem to do stuff associated with io. * -------------------------------- */ static void InitStdio() { - DebugFileOpen(); + DebugFileOpen(); } /* -------------------------------- * InitPostgres -- - * Initialize POSTGRES. + * Initialize POSTGRES. * * Note: - * Be very careful with the order of calls in the InitPostgres function. + * Be very careful with the order of calls in the InitPostgres function. * -------------------------------- */ -bool PostgresIsInitialized = false; -extern int NBuffers; +bool PostgresIsInitialized = false; +extern int NBuffers; /* - * this global is used by wei for testing his code, but must be declared - * here rather than in postgres.c so that it's defined for cinterface.a - * applications. + * this global is used by wei for testing his code, but must be declared + * here rather than in postgres.c so that it's defined for cinterface.a + * applications. */ -/*int testFlag = 0;*/ -int lockingOff = 0; +/*int testFlag = 0;*/ +int lockingOff = 0; /* */ void -InitPostgres(char *name) /* database name */ +InitPostgres(char *name) /* database name */ { - bool bootstrap; /* true if BootstrapProcessing */ - - /* ---------------- - * see if we're running in BootstrapProcessing mode - * ---------------- - */ - bootstrap = IsBootstrapProcessingMode(); - - /* ---------------- - * turn on the exception handler. Note: we cannot use elog, Assert, - * AssertState, etc. until after exception handling is on. - * ---------------- - */ - EnableExceptionHandling(true); - - /* ---------------- - * A stupid check to make sure we don't call this more than once. - * But things like ReinitPostgres() get around this by just diddling - * the PostgresIsInitialized flag. - * ---------------- - */ - AssertState(!PostgresIsInitialized); - - /* ---------------- - * Memory system initialization. - * (we may call palloc after EnableMemoryContext()) - * - * Note EnableMemoryContext() must happen before EnablePortalManager(). - * ---------------- - */ - EnableMemoryContext(true); /* initializes the "top context" */ - EnablePortalManager(true); /* memory for portal/transaction stuff */ - - /* ---------------- - * initialize the backend local portal stack used by - * internal PQ function calls. see src/lib/libpq/be-dumpdata.c - * This is different from the "portal manager" so this goes here. - * -cim 2/12/91 - * ---------------- - */ - be_portalinit(); - - /* ---------------- - * attach to shared memory and semaphores, and initialize our - * input/output/debugging file descriptors. - * ---------------- - */ - InitCommunication(); - InitStdio(); - - /* - * initialize the local buffer manager - */ - InitLocalBuffer(); - - if (!TransactionFlushEnabled()) - on_exitpg(FlushBufferPool, (caddr_t) NULL); - - if (bootstrap) { - SetDatabasePath("."); - SetDatabaseName(name); - } else { - DoChdirAndInitDatabaseNameAndPath(name); - } - - /* ******************************** - * code after this point assumes we are in the proper directory! - * ******************************** - */ - - /* ---------------- - * initialize the database id used for system caches and lock tables - * ---------------- - */ - InitMyDatabaseId(); - - smgrinit(); - - /* ---------------- - * initialize the transaction system and the relation descriptor - * cache. Note we have to make certain the lock manager is off while - * we do this. - * ---------------- - */ - AmiTransactionOverride(IsBootstrapProcessingMode()); - LockDisable(true); - - /* - * Part of the initialization processing done here sets a read - * lock on pg_log. Since locking is disabled the set doesn't have - * intended effect of locking out writers, but this is ok, since - * we only lock it to examine AMI transaction status, and this is - * never written after initdb is done. -mer 15 June 1992 - */ - RelationInitialize(); /* pre-allocated reldescs created here */ - InitializeTransactionSystem(); /* pg_log,etc init/crash recovery here */ - - LockDisable(false); - - /* ---------------- - * anyone knows what this does? something having to do with - * system catalog cache invalidation in the case of multiple - * backends, I think -cim 10/3/90 - * Sets up MyBackendId a unique backend identifier. - * ---------------- - */ - InitSharedInvalidationState(); - - /* ---------------- - * Set up a per backend process in shared memory. Must be done after - * InitSharedInvalidationState() as it relies on MyBackendId being - * initialized already. XXX -mer 11 Aug 1991 - * ---------------- - */ - InitProcess(PostgresIpcKey); - - if (MyBackendId > MaxBackendId || MyBackendId <= 0) { - elog(FATAL, "cinit2: bad backend id %d (%d)", - MyBackendTag, - MyBackendId); - } - - /* ---------------- - * initialize the access methods. - * ---------------- - */ - initam(); - - /* ---------------- - * initialize all the system catalog caches. - * ---------------- - */ - zerocaches(); - InitCatalogCache(); - - /* ---------------- - * set ourselves to the proper user id and figure out our postgres - * user id. If we ever add security so that we check for valid - * postgres users, we might do it here. - * ---------------- - */ - InitUserid(); - - /* ---------------- - * ok, all done, now let's make sure we don't do it again. - * ---------------- - */ - PostgresIsInitialized = true; -/* on_exitpg(DestroyLocalRelList, (caddr_t) NULL); */ - - /* ---------------- - * Done with "InitPostgres", now change to NormalProcessing unless - * we're in BootstrapProcessing mode. - * ---------------- - */ - if (!bootstrap) - SetProcessingMode(NormalProcessing); -/* if (testFlag || lockingOff) */ - if (lockingOff) - LockDisable(true); -} + bool bootstrap; /* true if BootstrapProcessing */ + + /* ---------------- + * see if we're running in BootstrapProcessing mode + * ---------------- + */ + bootstrap = IsBootstrapProcessingMode(); + + /* ---------------- + * turn on the exception handler. Note: we cannot use elog, Assert, + * AssertState, etc. until after exception handling is on. + * ---------------- + */ + EnableExceptionHandling(true); + + /* ---------------- + * A stupid check to make sure we don't call this more than once. + * But things like ReinitPostgres() get around this by just diddling + * the PostgresIsInitialized flag. + * ---------------- + */ + AssertState(!PostgresIsInitialized); + + /* ---------------- + * Memory system initialization. + * (we may call palloc after EnableMemoryContext()) + * + * Note EnableMemoryContext() must happen before EnablePortalManager(). + * ---------------- + */ + EnableMemoryContext(true); /* initializes the "top context" */ + EnablePortalManager(true); /* memory for portal/transaction stuff */ + + /* ---------------- + * initialize the backend local portal stack used by + * internal PQ function calls. see src/lib/libpq/be-dumpdata.c + * This is different from the "portal manager" so this goes here. + * -cim 2/12/91 + * ---------------- + */ + be_portalinit(); + + /* ---------------- + * attach to shared memory and semaphores, and initialize our + * input/output/debugging file descriptors. + * ---------------- + */ + InitCommunication(); + InitStdio(); + + /* + * initialize the local buffer manager + */ + InitLocalBuffer(); + if (!TransactionFlushEnabled()) + on_exitpg(FlushBufferPool, (caddr_t) NULL); + if (bootstrap) + { + SetDatabasePath("."); + SetDatabaseName(name); + } + else + { + DoChdirAndInitDatabaseNameAndPath(name); + } + + /* + * ******************************** code after this point assumes we + * are in the proper directory! ******************************** + * + */ + + /* ---------------- + * initialize the database id used for system caches and lock tables + * ---------------- + */ + InitMyDatabaseId(); + + smgrinit(); + + /* ---------------- + * initialize the transaction system and the relation descriptor + * cache. Note we have to make certain the lock manager is off while + * we do this. + * ---------------- + */ + AmiTransactionOverride(IsBootstrapProcessingMode()); + LockDisable(true); + + /* + * Part of the initialization processing done here sets a read lock on + * pg_log. Since locking is disabled the set doesn't have intended + * effect of locking out writers, but this is ok, since we only lock + * it to examine AMI transaction status, and this is never written + * after initdb is done. -mer 15 June 1992 + */ + RelationInitialize(); /* pre-allocated reldescs created here */ + InitializeTransactionSystem(); /* pg_log,etc init/crash recovery + * here */ + + LockDisable(false); + + /* ---------------- + * anyone knows what this does? something having to do with + * system catalog cache invalidation in the case of multiple + * backends, I think -cim 10/3/90 + * Sets up MyBackendId a unique backend identifier. + * ---------------- + */ + InitSharedInvalidationState(); + + /* ---------------- + * Set up a per backend process in shared memory. Must be done after + * InitSharedInvalidationState() as it relies on MyBackendId being + * initialized already. XXX -mer 11 Aug 1991 + * ---------------- + */ + InitProcess(PostgresIpcKey); + + if (MyBackendId > MaxBackendId || MyBackendId <= 0) + { + elog(FATAL, "cinit2: bad backend id %d (%d)", + MyBackendTag, + MyBackendId); + } + + /* ---------------- + * initialize the access methods. + * ---------------- + */ + initam(); + + /* ---------------- + * initialize all the system catalog caches. + * ---------------- + */ + zerocaches(); + InitCatalogCache(); + + /* ---------------- + * set ourselves to the proper user id and figure out our postgres + * user id. If we ever add security so that we check for valid + * postgres users, we might do it here. + * ---------------- + */ + InitUserid(); + + /* ---------------- + * ok, all done, now let's make sure we don't do it again. + * ---------------- + */ + PostgresIsInitialized = true; +/* on_exitpg(DestroyLocalRelList, (caddr_t) NULL); */ + + /* ---------------- + * Done with "InitPostgres", now change to NormalProcessing unless + * we're in BootstrapProcessing mode. + * ---------------- + */ + if (!bootstrap) + SetProcessingMode(NormalProcessing); +/* if (testFlag || lockingOff) */ + if (lockingOff) + LockDisable(true); +} |