/* ** An SQL user-function registered to do the work of an ATTACH statement. The ** three arguments to the function come directly from an attach statement: ** ** ATTACH DATABASE x AS y KEY z ** ** SELECT sqlite_attach(x, y, z) ** ** If the optional "KEY z" syntax is omitted, an SQL NULL is passed as the ** third argument. */ static void attachFunc( sqlite3_context *context, int NotUsed, sqlite3_value **argv ){ int i; int rc = 0; sqlite3 *db = sqlite3_context_db_handle(context); const char *zName; const char *zFile; char *zPath = 0; char *zErr = 0; unsigned int flags; Db *aNew; char *zErrDyn = 0; sqlite3_vfs *pVfs; UNUSED_PARAMETER(NotUsed); zFile = (const char *)sqlite3_value_text(argv[0]); zName = (const char *)sqlite3_value_text(argv[1]); if( zFile==0 ) zFile = ""; if( zName==0 ) zName = ""; /* Check for the following errors: ** ** * Too many attached databases, ** * Transaction currently open ** * Specified database name already being used. */ if( db->nDb>=db->aLimit[SQLITE_LIMIT_ATTACHED]+2 ){ zErrDyn = sqlite3MPrintf(db, "too many attached databases - max %d", db->aLimit[SQLITE_LIMIT_ATTACHED] ); goto attach_error; } if( !db->autoCommit ){ zErrDyn = sqlite3MPrintf(db, "cannot ATTACH database within transaction"); goto attach_error; } for(i=0; i<db->nDb; i++){ char *z = db->aDb[i].zName; assert( z && zName ); if( sqlite3StrICmp(z, zName)==0 ){ zErrDyn = sqlite3MPrintf(db, "database %s is already in use", zName); goto attach_error; } } /* Allocate the new entry in the db->aDb[] array and initialize the schema ** hash tables. */ if( db->aDb==db->aDbStatic ){ aNew = sqlite3DbMallocRaw(db, sizeof(db->aDb[0])*3 ); if( aNew==0 ) return; memcpy(aNew, db->aDb, sizeof(db->aDb[0])*2); }else{ aNew = sqlite3DbRealloc(db, db->aDb, sizeof(db->aDb[0])*(db->nDb+1) ); if( aNew==0 ) return; } db->aDb = aNew; aNew = &db->aDb[db->nDb]; memset(aNew, 0, sizeof(*aNew)); /* Open the database file. If the btree is successfully opened, use ** it to obtain the database schema. At this point the schema may ** or may not be initialized. */ flags = db->openFlags; rc = sqlite3ParseUri(db->pVfs->zName, zFile, &flags, &pVfs, &zPath, &zErr); if( rc!=SQLITE_OK ){ if( rc==SQLITE_NOMEM ) db->mallocFailed = 1; sqlite3_result_error(context, zErr, -1); sqlite3_free(zErr); return; } assert( pVfs ); flags |= SQLITE_OPEN_MAIN_DB; rc = sqlite3BtreeOpen(pVfs, zPath, db, &aNew->pBt, 0, flags); sqlite3_free( zPath ); db->nDb++; if( rc==SQLITE_CONSTRAINT ){ rc = SQLITE_ERROR; zErrDyn = sqlite3MPrintf(db, "database is already attached"); }else if( rc==SQLITE_OK ){ Pager *pPager; aNew->pSchema = sqlite3SchemaGet(db, aNew->pBt); if( !aNew->pSchema ){ rc = SQLITE_NOMEM; }else if( aNew->pSchema->file_format && aNew->pSchema->enc!=ENC(db) ){ zErrDyn = sqlite3MPrintf(db, "attached databases must use the same text encoding as main database"); rc = SQLITE_ERROR; } sqlite3BtreeEnter(aNew->pBt); pPager = sqlite3BtreePager(aNew->pBt); sqlite3PagerLockingMode(pPager, db->dfltLockMode); sqlite3BtreeSecureDelete(aNew->pBt, sqlite3BtreeSecureDelete(db->aDb[0].pBt,-1) ); #ifndef SQLITE_OMIT_PAGER_PRAGMAS sqlite3BtreeSetPagerFlags(aNew->pBt, 3 | (db->flags & PAGER_FLAGS_MASK)); #endif sqlite3BtreeLeave(aNew->pBt); } aNew->safety_level = 3; aNew->zName = sqlite3DbStrDup(db, zName); if( rc==SQLITE_OK && aNew->zName==0 ){ rc = SQLITE_NOMEM; } #ifdef SQLITE_HAS_CODEC if( rc==SQLITE_OK ){ extern int sqlite3CodecAttach(sqlite3*, int, const void*, int); extern void sqlite3CodecGetKey(sqlite3*, int, void**, int*); int nKey; char *zKey; int t = sqlite3_value_type(argv[2]); switch( t ){ case SQLITE_INTEGER: case SQLITE_FLOAT: zErrDyn = sqlite3DbStrDup(db, "Invalid key value"); rc = SQLITE_ERROR; break; case SQLITE_TEXT: case SQLITE_BLOB: nKey = sqlite3_value_bytes(argv[2]); zKey = (char *)sqlite3_value_blob(argv[2]); rc = sqlite3CodecAttach(db, db->nDb-1, zKey, nKey); break; case SQLITE_NULL: /* No key specified. Use the key from the main database */ sqlite3CodecGetKey(db, 0, (void**)&zKey, &nKey); if( nKey>0 || sqlite3BtreeGetOptimalReserve(db->aDb[0].pBt)>0 ){ rc = sqlite3CodecAttach(db, db->nDb-1, zKey, nKey); } break; } } #endif /* If the file was opened successfully, read the schema for the new database. ** If this fails, or if opening the file failed, then close the file and ** remove the entry from the db->aDb[] array. i.e. put everything back the way ** we found it. */ if( rc==SQLITE_OK ){ sqlite3BtreeEnterAll(db); rc = sqlite3Init(db, &zErrDyn); sqlite3BtreeLeaveAll(db); } #ifdef SQLITE_USER_AUTHENTICATION if( rc==SQLITE_OK ){ u8 newAuth = 0; rc = sqlite3UserAuthCheckLogin(db, zName, &newAuth); if( newAuth<db->auth.authLevel ){ rc = SQLITE_AUTH_USER; } } #endif if( rc ){ int iDb = db->nDb - 1; assert( iDb>=2 ); if( db->aDb[iDb].pBt ){ sqlite3BtreeClose(db->aDb[iDb].pBt); db->aDb[iDb].pBt = 0; db->aDb[iDb].pSchema = 0; } sqlite3ResetAllSchemasOfConnection(db); db->nDb = iDb; if( rc==SQLITE_NOMEM || rc==SQLITE_IOERR_NOMEM ){ db->mallocFailed = 1; sqlite3DbFree(db, zErrDyn); zErrDyn = sqlite3MPrintf(db, "out of memory"); }else if( zErrDyn==0 ){ zErrDyn = sqlite3MPrintf(db, "unable to open database: %s", zFile); } goto attach_error; } return; attach_error: /* Return an error if we get here */ if( zErrDyn ){ sqlite3_result_error(context, zErrDyn, -1); sqlite3DbFree(db, zErrDyn); } if( rc ) sqlite3_result_error_code(context, rc); }
static int openDatabase( const char *zFilename, /* Database filename UTF-8 encoded */ sqlite3 **ppDb, /* OUT: Returned database handle */ unsigned int flags, /* Operational flags */ const char *zVfs /* Name of the VFS to use */ ){ sqlite3 *db; /* Store allocated handle here */ int rc; /* Return code */ int isThreadsafe; /* True for threadsafe connections */ char *zOpen = 0; /* Filename argument to pass to BtreeOpen() */ char *zErrMsg = 0; /* Error message from sqlite3ParseUri() */ #ifdef SQLITE_ENABLE_API_ARMOR if( ppDb==0 ) return SQLITE_MISUSE_BKPT; #endif *ppDb = 0; #ifndef SQLITE_OMIT_AUTOINIT rc = sqlite3_initialize(); if( rc ) return rc; #endif /* Only allow sensible combinations of bits in the flags argument. ** Throw an error if any non-sense combination is used. If we ** do not block illegal combinations here, it could trigger ** assert() statements in deeper layers. Sensible combinations ** are: ** ** 1: SQLITE_OPEN_READONLY ** 2: SQLITE_OPEN_READWRITE ** 6: SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE */ assert( SQLITE_OPEN_READONLY == 0x01 ); assert( SQLITE_OPEN_READWRITE == 0x02 ); assert( SQLITE_OPEN_CREATE == 0x04 ); testcase( (1<<(flags&7))==0x02 ); /* READONLY */ testcase( (1<<(flags&7))==0x04 ); /* READWRITE */ testcase( (1<<(flags&7))==0x40 ); /* READWRITE | CREATE */ if( ((1<<(flags&7)) & 0x46)==0 ){ return SQLITE_MISUSE_BKPT; /* IMP: R-65497-44594 */ } if( sqlite3GlobalConfig.bCoreMutex==0 ){ isThreadsafe = 0; }else if( flags & SQLITE_OPEN_NOMUTEX ){ isThreadsafe = 0; }else if( flags & SQLITE_OPEN_FULLMUTEX ){ isThreadsafe = 1; }else{ isThreadsafe = sqlite3GlobalConfig.bFullMutex; } if( flags & SQLITE_OPEN_PRIVATECACHE ){ flags &= ~SQLITE_OPEN_SHAREDCACHE; }else if( sqlite3GlobalConfig.sharedCacheEnabled ){ flags |= SQLITE_OPEN_SHAREDCACHE; } /* Remove harmful bits from the flags parameter ** ** The SQLITE_OPEN_NOMUTEX and SQLITE_OPEN_FULLMUTEX flags were ** dealt with in the previous code block. Besides these, the only ** valid input flags for sqlite3_open_v2() are SQLITE_OPEN_READONLY, ** SQLITE_OPEN_READWRITE, SQLITE_OPEN_CREATE, SQLITE_OPEN_SHAREDCACHE, ** SQLITE_OPEN_PRIVATECACHE, and some reserved bits. Silently mask ** off all other flags. */ flags &= ~( SQLITE_OPEN_DELETEONCLOSE | SQLITE_OPEN_EXCLUSIVE | SQLITE_OPEN_MAIN_DB | SQLITE_OPEN_TEMP_DB | SQLITE_OPEN_TRANSIENT_DB | SQLITE_OPEN_MAIN_JOURNAL | SQLITE_OPEN_TEMP_JOURNAL | SQLITE_OPEN_SUBJOURNAL | SQLITE_OPEN_MASTER_JOURNAL | SQLITE_OPEN_NOMUTEX | SQLITE_OPEN_FULLMUTEX | SQLITE_OPEN_WAL ); /* Allocate the sqlite data structure */ db = sqlite3MallocZero( sizeof(sqlite3) ); if( db==0 ) goto opendb_out; if( isThreadsafe ){ db->mutex = sqlite3MutexAlloc(SQLITE_MUTEX_RECURSIVE); if( db->mutex==0 ){ sqlite3_free(db); db = 0; goto opendb_out; } } sqlite3_mutex_enter(db->mutex); db->errMask = 0xff; db->nDb = 2; db->magic = SQLITE_MAGIC_BUSY; db->aDb = db->aDbStatic; assert( sizeof(db->aLimit)==sizeof(aHardLimit) ); memcpy(db->aLimit, aHardLimit, sizeof(db->aLimit)); db->aLimit[SQLITE_LIMIT_WORKER_THREADS] = SQLITE_DEFAULT_WORKER_THREADS; db->autoCommit = 1; db->nextAutovac = -1; db->szMmap = sqlite3GlobalConfig.szMmap; db->nextPagesize = 0; db->nMaxSorterMmap = 0x7FFFFFFF; db->flags |= SQLITE_ShortColNames | SQLITE_EnableTrigger | SQLITE_CacheSpill #if !defined(SQLITE_DEFAULT_AUTOMATIC_INDEX) || SQLITE_DEFAULT_AUTOMATIC_INDEX | SQLITE_AutoIndex #endif #if SQLITE_DEFAULT_CKPTFULLFSYNC | SQLITE_CkptFullFSync #endif #if SQLITE_DEFAULT_FILE_FORMAT<4 | SQLITE_LegacyFileFmt #endif #ifdef SQLITE_ENABLE_LOAD_EXTENSION | SQLITE_LoadExtension #endif #if SQLITE_DEFAULT_RECURSIVE_TRIGGERS | SQLITE_RecTriggers #endif #if defined(SQLITE_DEFAULT_FOREIGN_KEYS) && SQLITE_DEFAULT_FOREIGN_KEYS | SQLITE_ForeignKeys #endif #if defined(SQLITE_REVERSE_UNORDERED_SELECTS) | SQLITE_ReverseOrder #endif ; sqlite3HashInit(&db->aCollSeq); #ifndef SQLITE_OMIT_VIRTUALTABLE sqlite3HashInit(&db->aModule); #endif /* Add the default collation sequence BINARY. BINARY works for both UTF-8 ** and UTF-16, so add a version for each to avoid any unnecessary ** conversions. The only error that can occur here is a malloc() failure. ** ** EVIDENCE-OF: R-52786-44878 SQLite defines three built-in collating ** functions: */ createCollation(db, "BINARY", SQLITE_UTF8, 0, binCollFunc, 0); createCollation(db, "BINARY", SQLITE_UTF16BE, 0, binCollFunc, 0); createCollation(db, "BINARY", SQLITE_UTF16LE, 0, binCollFunc, 0); createCollation(db, "NOCASE", SQLITE_UTF8, 0, nocaseCollatingFunc, 0); createCollation(db, "RTRIM", SQLITE_UTF8, (void*)1, binCollFunc, 0); if( db->mallocFailed ){ goto opendb_out; } /* EVIDENCE-OF: R-08308-17224 The default collating function for all ** strings is BINARY. */ db->pDfltColl = sqlite3FindCollSeq(db, SQLITE_UTF8, "BINARY", 0); assert( db->pDfltColl!=0 ); /* Parse the filename/URI argument. */ db->openFlags = flags; rc = sqlite3ParseUri(zVfs, zFilename, &flags, &db->pVfs, &zOpen, &zErrMsg); if( rc!=SQLITE_OK ){ if( rc==SQLITE_NOMEM ) db->mallocFailed = 1; sqlite3ErrorWithMsg(db, rc, zErrMsg ? "%s" : 0, zErrMsg); sqlite3_free(zErrMsg); goto opendb_out; } /* Open the backend database driver */ rc = sqlite3BtreeOpen(db->pVfs, zOpen, db, &db->aDb[0].pBt, 0, flags | SQLITE_OPEN_MAIN_DB); if( rc!=SQLITE_OK ){ if( rc==SQLITE_IOERR_NOMEM ){ rc = SQLITE_NOMEM; } sqlite3Error(db, rc); goto opendb_out; } sqlite3BtreeEnter(db->aDb[0].pBt); db->aDb[0].pSchema = sqlite3SchemaGet(db, db->aDb[0].pBt); if( !db->mallocFailed ) ENC(db) = SCHEMA_ENC(db); sqlite3BtreeLeave(db->aDb[0].pBt); db->aDb[1].pSchema = sqlite3SchemaGet(db, 0); /* The default safety_level for the main database is 'full'; for the temp ** database it is 'NONE'. This matches the pager layer defaults. */ db->aDb[0].zName = "main"; db->aDb[0].safety_level = 3; db->aDb[1].zName = "temp"; db->aDb[1].safety_level = 1; db->magic = SQLITE_MAGIC_OPEN; if( db->mallocFailed ){ goto opendb_out; } /* Register all built-in functions, but do not attempt to read the ** database schema yet. This is delayed until the first time the database ** is accessed. */ sqlite3Error(db, SQLITE_OK); sqlite3RegisterBuiltinFunctions(db); /* Load automatic extensions - extensions that have been registered ** using the sqlite3_automatic_extension() API. */ rc = sqlite3_errcode(db); if( rc==SQLITE_OK ){ sqlite3AutoLoadExtensions(db); rc = sqlite3_errcode(db); if( rc!=SQLITE_OK ){ goto opendb_out; } } #ifdef SQLITE_ENABLE_FTS1 if( !db->mallocFailed ){ extern int sqlite3Fts1Init(sqlite3*); rc = sqlite3Fts1Init(db); } #endif #ifdef SQLITE_ENABLE_FTS2 if( !db->mallocFailed && rc==SQLITE_OK ){ extern int sqlite3Fts2Init(sqlite3*); rc = sqlite3Fts2Init(db); } #endif #ifdef SQLITE_ENABLE_FTS3 if( !db->mallocFailed && rc==SQLITE_OK ){ rc = sqlite3Fts3Init(db); } #endif #ifdef SQLITE_ENABLE_ICU if( !db->mallocFailed && rc==SQLITE_OK ){ rc = sqlite3IcuInit(db); } #endif #ifdef SQLITE_ENABLE_RTREE if( !db->mallocFailed && rc==SQLITE_OK){ rc = sqlite3RtreeInit(db); } #endif #ifdef SQLITE_ENABLE_DBSTAT_VTAB if( !db->mallocFailed && rc==SQLITE_OK){ int sqlite3_dbstat_register(sqlite3*); rc = sqlite3_dbstat_register(db); } #endif /* -DSQLITE_DEFAULT_LOCKING_MODE=1 makes EXCLUSIVE the default locking ** mode. -DSQLITE_DEFAULT_LOCKING_MODE=0 make NORMAL the default locking ** mode. Doing nothing at all also makes NORMAL the default. */ #ifdef SQLITE_DEFAULT_LOCKING_MODE db->dfltLockMode = SQLITE_DEFAULT_LOCKING_MODE; sqlite3PagerLockingMode(sqlite3BtreePager(db->aDb[0].pBt), SQLITE_DEFAULT_LOCKING_MODE); #endif if( rc ) sqlite3Error(db, rc); /* Enable the lookaside-malloc subsystem */ setupLookaside(db, 0, sqlite3GlobalConfig.szLookaside, sqlite3GlobalConfig.nLookaside); sqlite3_wal_autocheckpoint(db, SQLITE_DEFAULT_WAL_AUTOCHECKPOINT); opendb_out: sqlite3_free(zOpen); if( db ){ assert( db->mutex!=0 || isThreadsafe==0 || sqlite3GlobalConfig.bFullMutex==0 ); sqlite3_mutex_leave(db->mutex); } rc = sqlite3_errcode(db); assert( db!=0 || rc==SQLITE_NOMEM ); if( rc==SQLITE_NOMEM ){ sqlite3_close(db); db = 0; }else if( rc!=SQLITE_OK ){ db->magic = SQLITE_MAGIC_SICK; } *ppDb = db; #ifdef SQLITE_ENABLE_SQLLOG if( sqlite3GlobalConfig.xSqllog ){ /* Opening a db handle. Fourth parameter is passed 0. */ void *pArg = sqlite3GlobalConfig.pSqllogArg; sqlite3GlobalConfig.xSqllog(pArg, db, zFilename, 0); } #endif return sqlite3ApiExit(0, rc); }