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jrd.cpp
6747 lines (5676 loc) · 159 KB
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jrd.cpp
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/*
* PROGRAM: JRD Access Method
* MODULE: jrd.cpp
* DESCRIPTION: User visible entrypoints
*
* The contents of this file are subject to the Interbase Public
* License Version 1.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy
* of the License at http://www.Inprise.com/IPL.html
*
* Software distributed under the License is distributed on an
* "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express
* or implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code was created by Inprise Corporation
* and its predecessors. Portions created by Inprise Corporation are
* Copyright (C) Inprise Corporation.
*
* All Rights Reserved.
* Contributor(s): ______________________________________.
*
* 2001.07.06 Sean Leyne - Code Cleanup, removed "#ifdef READONLY_DATABASE"
* conditionals, as the engine now fully supports
* readonly databases.
* 2001.07.09 Sean Leyne - Restore default setting to Force Write = "On", for
* Windows NT platform, for new database files. This was changed
* with IB 6.0 to OFF and has introduced many reported database
* corruptions.
*
* 2002.10.29 Sean Leyne - Removed obsolete "Netware" port
* Claudio Valderrama C.
* Adriano dos Santos Fernandes
*
*/
#include "firebird.h"
#include "../jrd/common.h"
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "../jrd/common.h"
#include "../jrd/ThreadStart.h"
#include "../jrd/os/thd_priority.h"
#include <stdarg.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_PWD_H
#include <pwd.h>
#endif
#include <errno.h>
#include "../jrd/ibase.h"
#include "../jrd/jrd.h"
#include "../jrd/irq.h"
#include "../jrd/drq.h"
#include "../jrd/req.h"
#include "../jrd/tra.h"
#include "../jrd/blb.h"
#include "../jrd/lck.h"
#include "../jrd/nbak.h"
#include "../jrd/scl.h"
#include "../jrd/os/pio.h"
#include "../jrd/ods.h"
#include "../jrd/exe.h"
#include "../jrd/extds/ExtDS.h"
#include "../jrd/val.h"
#include "../jrd/rse.h"
#include "../jrd/fil.h"
#include "../jrd/intl.h"
#include "../jrd/sbm.h"
#include "../jrd/svc.h"
#include "../jrd/sdw.h"
#include "../jrd/lls.h"
#include "../jrd/cch.h"
#include "../intl/charsets.h"
#include "../jrd/sort.h"
#include "../jrd/PreparedStatement.h"
#include "../jrd/blb_proto.h"
#include "../jrd/cch_proto.h"
#include "../jrd/cmp_proto.h"
#include "../jrd/dbg_proto.h"
#include "../jrd/dyn_proto.h"
#include "../jrd/err_proto.h"
#include "../jrd/exe_proto.h"
#include "../jrd/ext_proto.h"
#include "../jrd/fun_proto.h"
#include "../jrd/gds_proto.h"
#include "../jrd/inf_proto.h"
#include "../jrd/ini_proto.h"
#include "../jrd/intl_proto.h"
#include "../jrd/isc_f_proto.h"
#include "../jrd/isc_proto.h"
#include "../jrd/jrd_proto.h"
#include "../jrd/lck_proto.h"
#include "../jrd/met_proto.h"
#include "../jrd/mov_proto.h"
#include "../jrd/pag_proto.h"
#include "../jrd/par_proto.h"
#include "../jrd/os/pio_proto.h"
#include "../jrd/scl_proto.h"
#include "../jrd/sdw_proto.h"
#include "../jrd/shut_proto.h"
#include "../jrd/sort_proto.h"
#include "../jrd/thread_proto.h"
#include "../jrd/tra_proto.h"
#include "../jrd/val_proto.h"
#include "../jrd/vio_proto.h"
#include "../jrd/file_params.h"
#include "../jrd/event_proto.h"
#include "../jrd/why_proto.h"
#include "../jrd/flags.h"
#include "../jrd/Database.h"
#include "../common/config/config.h"
#include "../common/config/dir_list.h"
#include "../jrd/db_alias.h"
#include "../jrd/trace/TraceManager.h"
#include "../jrd/trace/TraceObjects.h"
#include "../jrd/trace/TraceJrdHelpers.h"
#include "../jrd/IntlManager.h"
#include "../common/classes/fb_tls.h"
#include "../common/classes/ClumpletReader.h"
#include "../common/classes/RefMutex.h"
#include "../common/utils_proto.h"
#include "../jrd/DebugInterface.h"
#include "../dsql/dsql.h"
#include "../dsql/dsql_proto.h"
using namespace Jrd;
using namespace Firebird;
const SSHORT WAIT_PERIOD = -1;
#ifdef SUPPORT_RAW_DEVICES
#define unlink PIO_unlink
#endif
#ifdef DEV_BUILD
int debug;
#endif
namespace
{
Database* databases = NULL;
GlobalPtr<Mutex> databases_mutex;
bool engineShuttingDown = false;
class EngineStartup
{
public:
static void init()
{
IbUtil::initialize();
IntlManager::initialize();
}
static void cleanup()
{
}
};
InitMutex<EngineStartup> engineStartup;
inline void validateHandle(thread_db* tdbb, Attachment* const attachment)
{
if (!attachment->checkHandle() || !attachment->att_database->checkHandle())
{
status_exception::raise(Arg::Gds(isc_bad_db_handle));
}
tdbb->setAttachment(attachment);
tdbb->setDatabase(attachment->att_database);
}
inline void validateHandle(thread_db* tdbb, jrd_tra* const transaction)
{
if (!transaction->checkHandle())
status_exception::raise(Arg::Gds(isc_bad_trans_handle));
validateHandle(tdbb, transaction->tra_attachment);
tdbb->setTransaction(transaction);
}
inline void validateHandle(thread_db* tdbb, jrd_req* const request)
{
if (!request->checkHandle())
status_exception::raise(Arg::Gds(isc_bad_req_handle));
validateHandle(tdbb, request->req_attachment);
}
inline void validateHandle(thread_db* tdbb, dsql_req* const statement)
{
if (!statement->checkHandle())
status_exception::raise(Arg::Gds(isc_bad_req_handle));
validateHandle(tdbb, statement->req_dbb->dbb_attachment);
}
inline void validateHandle(thread_db* tdbb, blb* blob)
{
if (!blob->checkHandle())
status_exception::raise(Arg::Gds(isc_bad_segstr_handle));
validateHandle(tdbb, blob->blb_transaction);
validateHandle(tdbb, blob->blb_attachment);
}
inline void validateHandle(Service* service)
{
if (!service->checkHandle())
status_exception::raise(Arg::Gds(isc_bad_svc_handle));
}
class AttachmentHolder
{
public:
AttachmentHolder(thread_db* arg, bool lockAtt)
: tdbb(arg)
{
Attachment* attachment = tdbb->getAttachment();
if (lockAtt && attachment)
{
if (engineShuttingDown)
status_exception::raise(Arg::Gds(isc_att_shutdown));
attachment->att_mutex.enter();
attLocked = true;
}
else
attLocked = false;
}
~AttachmentHolder()
{
Attachment* attachment = tdbb->getAttachment();
if (attLocked && attachment)
attachment->att_mutex.leave();
}
private:
thread_db* tdbb;
bool attLocked;
private:
// copying is prohibited
AttachmentHolder(const AttachmentHolder&);
AttachmentHolder& operator =(const AttachmentHolder&);
};
class DatabaseContextHolder : public AttachmentHolder, Database::SyncGuard,
public Jrd::ContextPoolHolder
{
public:
explicit DatabaseContextHolder(thread_db* arg, bool lockAtt = true)
: AttachmentHolder(arg, lockAtt),
Database::SyncGuard(arg->getDatabase()),
Jrd::ContextPoolHolder(arg, arg->getDatabase()->dbb_permanent),
tdbb(arg)
{
Database* dbb = tdbb->getDatabase();
++dbb->dbb_use_count;
}
~DatabaseContextHolder()
{
Database* dbb = tdbb->getDatabase();
if (dbb->checkHandle())
{
--dbb->dbb_use_count;
}
}
private:
// copying is prohibited
DatabaseContextHolder(const DatabaseContextHolder&);
DatabaseContextHolder& operator=(const DatabaseContextHolder&);
thread_db* tdbb;
};
void validateAccess(const Attachment* attachment)
{
if (!attachment->locksmith())
{
ERR_post(Arg::Gds(isc_adm_task_denied));
}
}
} // anonymous
#ifdef WIN_NT
#include <windows.h>
// these should stop a most annoying warning
#undef TEXT
#define TEXT SCHAR
#endif // WIN_NT
void Jrd::Trigger::compile(thread_db* tdbb)
{
if (!request /*&& !compile_in_progress*/)
{
SET_TDBB(tdbb);
Database* dbb = tdbb->getDatabase();
Database::CheckoutLockGuard guard(dbb, dbb->dbb_meta_mutex);
if (request)
{
return;
}
compile_in_progress = true;
// Allocate statement memory pool
MemoryPool* new_pool = dbb->createPool();
// Trigger request is not compiled yet. Lets do it now
USHORT par_flags = (USHORT) (flags & TRG_ignore_perm) ? csb_ignore_perm : 0;
if (type & 1)
par_flags |= csb_pre_trigger;
else
par_flags |= csb_post_trigger;
CompilerScratch* csb = NULL;
try {
Jrd::ContextPoolHolder context(tdbb, new_pool);
csb = CompilerScratch::newCsb(*tdbb->getDefaultPool(), 5);
csb->csb_g_flags |= par_flags;
if (!dbg_blob_id.isEmpty())
DBG_parse_debug_info(tdbb, &dbg_blob_id, csb->csb_dbg_info);
PAR_blr(tdbb, relation, blr.begin(), (ULONG) blr.getCount(), NULL, &csb, &request,
(relation ? true : false), par_flags);
delete csb;
}
catch (const Exception&)
{
compile_in_progress = false;
delete csb;
csb = NULL;
if (request)
{
CMP_release(tdbb, request);
request = NULL;
}
else {
dbb->deletePool(new_pool);
}
throw;
}
request->req_trg_name = name;
if (sys_trigger)
{
request->req_flags |= req_sys_trigger;
}
if (flags & TRG_ignore_perm)
{
request->req_flags |= req_ignore_perm;
}
compile_in_progress = false;
}
}
void Jrd::Trigger::release(thread_db* tdbb)
{
if (blr.getCount() == 0 || !request || CMP_clone_is_active(request))
{
return; // FALSE;
}
CMP_release(tdbb, request);
request = NULL;
return; // TRUE;
}
// Option block for database parameter block
class DatabaseOptions
{
public:
USHORT dpb_wal_action;
SLONG dpb_sweep_interval;
ULONG dpb_page_buffers;
bool dpb_set_page_buffers;
ULONG dpb_buffers;
USHORT dpb_verify;
USHORT dpb_sweep;
USHORT dpb_dbkey_scope;
USHORT dpb_page_size;
bool dpb_activate_shadow;
bool dpb_delete_shadow;
bool dpb_no_garbage;
USHORT dpb_shutdown;
SSHORT dpb_shutdown_delay;
USHORT dpb_online;
bool dpb_force_write;
bool dpb_set_force_write;
bool dpb_no_reserve;
bool dpb_set_no_reserve;
SSHORT dpb_interp;
bool dpb_single_user;
bool dpb_overwrite;
bool dpb_sec_attach;
bool dpb_disable_wal;
bool dpb_gsec_attach;
SLONG dpb_connect_timeout;
SLONG dpb_dummy_packet_interval;
bool dpb_db_readonly;
bool dpb_set_db_readonly;
bool dpb_gfix_attach;
bool dpb_gstat_attach;
USHORT dpb_sql_dialect;
USHORT dpb_set_db_sql_dialect;
SLONG dpb_remote_pid;
bool dpb_no_db_triggers;
bool dpb_gbak_attach;
bool dpb_trusted_role;
bool dpb_utf8_filename;
ULONG dpb_ext_call_depth;
ULONG dpb_flags; // to OR'd with dbb_flags
// here begin compound objects
// for constructor to work properly dpb_sys_user_name
// MUST be FIRST
string dpb_sys_user_name;
string dpb_user_name;
string dpb_password;
string dpb_password_enc;
string dpb_role_name;
string dpb_journal;
string dpb_key;
string dpb_lc_ctype;
PathName dpb_working_directory;
string dpb_set_db_charset;
string dpb_network_protocol;
string dpb_remote_address;
string dpb_trusted_login;
PathName dpb_remote_process;
PathName dpb_org_filename;
public:
DatabaseOptions()
{
memset(this, 0,
reinterpret_cast<char*>(&this->dpb_sys_user_name) - reinterpret_cast<char*>(this));
}
void get(const UCHAR*, USHORT, bool&);
private:
void getPath(ClumpletReader& reader, PathName& s)
{
reader.getPath(s);
if (!dpb_utf8_filename)
ISC_systemToUtf8(s);
ISC_unescape(s);
}
void getString(ClumpletReader& reader, string& s)
{
reader.getString(s);
if (!dpb_utf8_filename)
ISC_systemToUtf8(s);
ISC_unescape(s);
}
};
/// trace manager support
class TraceFailedConnection : public TraceConnection
{
public:
TraceFailedConnection(const char* filename, const DatabaseOptions* options) :
m_filename(filename),
m_options(options)
{}
virtual int getConnectionID() { return 0; }
virtual int getProcessID() { return m_options->dpb_remote_pid; }
virtual const char* getDatabaseName() { return m_filename; }
virtual const char* getUserName()
{
if (m_options->dpb_user_name.empty())
return m_options->dpb_trusted_login.c_str();
return m_options->dpb_user_name.c_str();
}
virtual const char* getRoleName() { return m_options->dpb_role_name.c_str(); }
virtual const char* getRemoteProtocol() { return m_options->dpb_network_protocol.c_str(); }
virtual const char* getRemoteAddress() { return m_options->dpb_remote_address.c_str(); }
virtual int getRemoteProcessID() { return m_options->dpb_remote_pid; }
virtual const char* getRemoteProcessName() { return m_options->dpb_remote_process.c_str(); }
private:
const char* m_filename;
const DatabaseOptions* m_options;
};
static void cancel_attachments();
static void check_database(thread_db* tdbb);
static void check_transaction(thread_db*, jrd_tra*);
static void commit(thread_db*, jrd_tra*, const bool);
static bool drop_files(const jrd_file*);
static void find_intl_charset(thread_db*, Attachment*, const DatabaseOptions*);
static jrd_tra* find_transaction(thread_db*, ISC_STATUS);
static void init_database_locks(thread_db*);
static ISC_STATUS handle_error(ISC_STATUS*, ISC_STATUS);
static void run_commit_triggers(thread_db* tdbb, jrd_tra* transaction);
static void verify_request_synchronization(jrd_req*& request, SSHORT level);
static unsigned int purge_transactions(thread_db*, Attachment*, const bool, const ULONG);
namespace {
enum VdnResult {VDN_FAIL, VDN_OK, VDN_SECURITY};
}
static VdnResult verifyDatabaseName(const PathName&, ISC_STATUS*, bool);
static ISC_STATUS unwindAttach(const Exception& ex,
ISC_STATUS* userStatus,
thread_db* tdbb,
Attachment* attachment,
Database* dbb);
#ifdef WIN_NT
static void ExtractDriveLetter(const TEXT*, ULONG*);
#endif
static Database* init(thread_db*, const PathName&, bool);
static void prepare(thread_db*, jrd_tra*, USHORT, const UCHAR*);
static void release_attachment(thread_db*, Attachment*);
static void detachLocksFromAttachment(Attachment*);
static void rollback(thread_db*, jrd_tra*, const bool);
static void shutdown_database(Database*, const bool);
static void strip_quotes(string&);
static void purge_attachment(thread_db*, Attachment*, const bool);
static void getUserInfo(UserId&, const DatabaseOptions&);
static bool shutdown_dbb(thread_db*, Database*);
static THREAD_ENTRY_DECLARE shutdown_thread(THREAD_ENTRY_PARAM);
static void cancel_attachments()
{
MutexLockGuard guard(databases_mutex);
engineShuttingDown = true;
for (Database* dbb = databases; dbb; dbb = dbb->dbb_next)
{
if ( !(dbb->dbb_flags & (DBB_bugcheck | DBB_not_in_use | DBB_security_db)) )
{
Database::SyncGuard dsGuard(dbb);
Attachment* lockedAtt = NULL;
Attachment* att = dbb->dbb_attachments;
while (att)
{
// Try to cancel attachment and lock it. Handle case when attachment
// deleted while waiting for lock.
while (true)
{
if (att->att_mutex.tryEnter() || (att->att_flags & ATT_purge_error))
{
lockedAtt = att;
break;
}
{
const bool cancel_disable = (att->att_flags & ATT_cancel_disable);
Database::Checkout dcoHolder(dbb);
if (!cancel_disable)
{
ISC_STATUS_ARRAY status;
jrd8_cancel_operation(status, &att, fb_cancel_enable);
jrd8_cancel_operation(status, &att, fb_cancel_raise);
}
THREAD_YIELD();
}
// check if attachment still exist
if (lockedAtt && lockedAtt->att_next != att) {
break;
}
if (dbb->dbb_attachments != att) {
break;
}
}
att = lockedAtt ? lockedAtt->att_next : dbb->dbb_attachments;
}
}
}
}
//____________________________________________________________
//
// check whether we need to perform an autocommit;
// do it here to prevent committing every record update
// in a statement
//
static void check_autocommit(jrd_req* request, thread_db* tdbb)
{
// dimitr: we should ignore autocommit for requests
// created by EXECUTE STATEMENT
// AP: also do nothing if request is cancelled and
// transaction is already missing
if ((!request->req_transaction) || (request->req_transaction->tra_callback_count > 0))
return;
if (request->req_transaction->tra_flags & TRA_perform_autocommit)
{
if (!(tdbb->getAttachment()->att_flags & ATT_no_db_triggers) &&
!(request->req_transaction->tra_flags & TRA_prepared))
{
// run ON TRANSACTION COMMIT triggers
run_commit_triggers(tdbb, request->req_transaction);
}
request->req_transaction->tra_flags &= ~TRA_perform_autocommit;
TRA_commit(tdbb, request->req_transaction, true);
}
}
static ISC_STATUS successful_completion(ISC_STATUS* status, ISC_STATUS return_code = FB_SUCCESS)
{
fb_assert(status);
// This assert validates whether we really have a successful status vector
fb_assert(status[0] != isc_arg_gds || status[1] == FB_SUCCESS);
// Clear the status vector if it doesn't contain a warning
if (status[0] != isc_arg_gds || status[1] != FB_SUCCESS || status[2] != isc_arg_warning)
{
fb_utils::init_status(status);
}
return return_code;
}
const int SWEEP_INTERVAL = 20000;
const char DBL_QUOTE = '\042';
const char SINGLE_QUOTE = '\'';
#define GDS_ATTACH_DATABASE jrd8_attach_database
#define GDS_BLOB_INFO jrd8_blob_info
#define GDS_CANCEL_BLOB jrd8_cancel_blob
#define GDS_CANCEL_EVENTS jrd8_cancel_events
#define FB_CANCEL_OPERATION jrd8_cancel_operation
#define GDS_CLOSE_BLOB jrd8_close_blob
#define GDS_COMMIT jrd8_commit_transaction
#define GDS_COMMIT_RETAINING jrd8_commit_retaining
#define GDS_COMPILE jrd8_compile_request
#define GDS_CREATE_BLOB2 jrd8_create_blob2
#define GDS_CREATE_DATABASE jrd8_create_database
#define GDS_DATABASE_INFO jrd8_database_info
#define GDS_DDL jrd8_ddl
#define GDS_DETACH jrd8_detach_database
#define GDS_DROP_DATABASE jrd8_drop_database
#define GDS_GET_SEGMENT jrd8_get_segment
#define GDS_GET_SLICE jrd8_get_slice
#define GDS_OPEN_BLOB2 jrd8_open_blob2
#define GDS_PREPARE jrd8_prepare_transaction
#define GDS_PUT_SEGMENT jrd8_put_segment
#define GDS_PUT_SLICE jrd8_put_slice
#define GDS_QUE_EVENTS jrd8_que_events
#define GDS_RECONNECT jrd8_reconnect_transaction
#define GDS_RECEIVE jrd8_receive
#define GDS_RELEASE_REQUEST jrd8_release_request
#define GDS_REQUEST_INFO jrd8_request_info
#define GDS_ROLLBACK jrd8_rollback_transaction
#define GDS_ROLLBACK_RETAINING jrd8_rollback_retaining
#define GDS_SEEK_BLOB jrd8_seek_blob
#define GDS_SEND jrd8_send
#define GDS_SERVICE_ATTACH jrd8_service_attach
#define GDS_SERVICE_DETACH jrd8_service_detach
#define GDS_SERVICE_QUERY jrd8_service_query
#define GDS_SERVICE_START jrd8_service_start
#define GDS_START_AND_SEND jrd8_start_and_send
#define GDS_START jrd8_start_request
#define GDS_START_MULTIPLE jrd8_start_multiple
#define GDS_START_TRANSACTION jrd8_start_transaction
#define GDS_TRANSACT_REQUEST jrd8_transact_request
#define GDS_TRANSACTION_INFO jrd8_transaction_info
#define GDS_UNWIND jrd8_unwind_request
#define GDS_SHUTDOWN jrd8_shutdown_all
#define GDS_PING jrd8_ping_attachment
#define GDS_DSQL_ALLOCATE jrd8_allocate_statement
#define GDS_DSQL_EXECUTE jrd8_execute
#define GDS_DSQL_EXECUTE_IMMEDIATE jrd8_execute_immediate
#define GDS_DSQL_FETCH jrd8_fetch
#define GDS_DSQL_FREE jrd8_free_statement
#define GDS_DSQL_INSERT jrd8_insert
#define GDS_DSQL_PREPARE jrd8_prepare
#define GDS_DSQL_SET_CURSOR jrd8_set_cursor
#define GDS_DSQL_SQL_INFO jrd8_sql_info
// External hook definitions
/* dimitr: just uncomment the following line to use this feature.
Requires support from the PIO modules. Only Win32 is 100% ready
for this so far. Note that the database encryption code in the
PIO layer seems to be incompatible with the SUPERSERVER_V2 code.
2003.02.09 */
//#define ISC_DATABASE_ENCRYPTION
static const char* CRYPT_IMAGE = "fbcrypt";
static const char* ENCRYPT = "encrypt";
static const char* DECRYPT = "decrypt";
void trace_failed_attach(TraceManager* traceManager, const char* filename,
const DatabaseOptions& options, bool create, bool no_priv)
{
// Report to Trace API that attachment has not been created
const char* origFilename = filename;
if (options.dpb_org_filename.hasData())
origFilename = options.dpb_org_filename.c_str();
if (!traceManager)
{
TraceManager tempMgr(origFilename);
if (tempMgr.needs().event_attach)
{
TraceFailedConnection conn(origFilename, &options);
tempMgr.event_attach(&conn, create, no_priv ? res_unauthorized : res_failed);
}
}
else
{
if (traceManager->needs().event_attach)
{
TraceFailedConnection conn(origFilename, &options);
traceManager->event_attach(&conn, create, no_priv ? res_unauthorized : res_failed);
}
}
}
ISC_STATUS GDS_ATTACH_DATABASE(ISC_STATUS* user_status,
const TEXT* filename,
Attachment** handle,
SSHORT dpb_length,
const UCHAR* dpb)
{
/**************************************
*
* g d s _ $ a t t a c h _ d a t a b a s e
*
**************************************
*
* Functional description
* Attach a moldy, grungy, old database
* sullied by user data.
*
**************************************/
ThreadContextHolder tdbb(user_status);
if (*handle)
{
return handle_error(user_status, isc_bad_db_handle);
}
UserId userId;
DatabaseOptions options;
bool invalid_client_SQL_dialect = false;
SecurityDatabase::InitHolder siHolder;
try
{
// Process database parameter block
options.get(dpb, dpb_length, invalid_client_SQL_dialect);
// Check for correct credentials supplied
getUserInfo(userId, options);
}
catch (const DelayFailedLogin& ex)
{
trace_failed_attach(NULL, filename, options, false, true);
ex.sleep();
return ex.stuff_exception(user_status);
}
catch (const Exception& ex)
{
trace_failed_attach(NULL, filename, options, false, true);
return ex.stuff_exception(user_status);
}
PathName file_name;
if (options.dpb_org_filename.hasData())
file_name = options.dpb_org_filename;
else
{
file_name = filename;
if (!options.dpb_utf8_filename)
ISC_systemToUtf8(file_name);
ISC_unescape(file_name);
}
ISC_utf8ToSystem(file_name);
PathName expanded_name;
// Resolve given alias name
const bool is_alias = ResolveDatabaseAlias(file_name, expanded_name);
if (is_alias)
{
ISC_systemToUtf8(expanded_name);
ISC_unescape(expanded_name);
ISC_utf8ToSystem(expanded_name);
ISC_expand_filename(expanded_name, false);
}
else
{
expanded_name = filename;
if (!options.dpb_utf8_filename)
ISC_systemToUtf8(expanded_name);
ISC_unescape(expanded_name);
ISC_utf8ToSystem(expanded_name);
}
// Check database against conf file.
const VdnResult vdn = verifyDatabaseName(expanded_name, user_status, is_alias);
if (!is_alias && vdn == VDN_FAIL)
{
trace_failed_attach(NULL, filename, options, false, false);
return user_status[1];
}
Database* dbb = NULL;
MutexEnsureUnlock guardDatabases(databases_mutex);
guardDatabases.enter();
try
{
// Unless we're already attached, do some initialization
dbb = init(tdbb, expanded_name, true);
}
catch (const Exception& ex)
{
return ex.stuff_exception(user_status);
}
fb_assert(dbb);
tdbb->setDatabase(dbb);
DatabaseContextHolder dbbHolder(tdbb);
dbb->dbb_flags |= DBB_being_opened;
// Initialize special error handling
Attachment* attachment = NULL;
bool initing_security = false;
try {
#ifndef NO_NFS
// Don't check nfs if single user
if (!options.dpb_single_user)
#endif
{
// Check to see if the database is truly local or if it just looks
// that way
if (ISC_check_if_remote(expanded_name, true)) {
ERR_post(Arg::Gds(isc_unavailable));
}
}
/* If database to be opened is security database, then only
gsec or SecurityDatabase may open it. This protects from use
of old gsec to write wrong password hashes into it. */
if (vdn == VDN_SECURITY && !options.dpb_gsec_attach && !options.dpb_sec_attach)
{
ERR_post(Arg::Gds(isc_no_priv) << Arg::Str("direct") <<
Arg::Str("security database") <<
Arg::Str(file_name));
}
// Worry about encryption key
if (dbb->dbb_decrypt)
{
if (dbb->dbb_filename.hasData() &&
(dbb->dbb_encrypt_key.hasData() || options.dpb_key.hasData()))
{
if ((dbb->dbb_encrypt_key.hasData() && options.dpb_key.isEmpty()) ||
(dbb->dbb_encrypt_key.empty() && options.dpb_key.hasData()) ||
(dbb->dbb_encrypt_key != options.dpb_key))
{
ERR_post(Arg::Gds(isc_no_priv) << Arg::Str("encryption") <<
Arg::Str("database") <<
Arg::Str(file_name));
}
}
else if (options.dpb_key.hasData())
{
dbb->dbb_encrypt_key = options.dpb_key;
}
}
attachment = Attachment::create(dbb);
tdbb->setAttachment(attachment);
attachment->att_filename = is_alias ? file_name : expanded_name;
attachment->att_network_protocol = options.dpb_network_protocol;
attachment->att_remote_address = options.dpb_remote_address;
attachment->att_remote_pid = options.dpb_remote_pid;
attachment->att_remote_process = options.dpb_remote_process;
attachment->att_next = dbb->dbb_attachments;
attachment->att_ext_call_depth = options.dpb_ext_call_depth;
dbb->dbb_attachments = attachment;
dbb->dbb_flags &= ~DBB_being_opened;
dbb->dbb_sys_trans->tra_attachment = attachment;
attachment->att_charset = options.dpb_interp;
if (options.dpb_no_garbage)
attachment->att_flags |= ATT_no_cleanup;
if (options.dpb_gbak_attach)
attachment->att_flags |= ATT_gbak_attachment;
if (options.dpb_gstat_attach)
attachment->att_flags |= ATT_gstat_attachment;
if (options.dpb_gfix_attach)
attachment->att_flags |= ATT_gfix_attachment;
if (options.dpb_working_directory.hasData()) {
attachment->att_working_directory = options.dpb_working_directory;
}
// If we're a not a secondary attachment, initialize some stuff
bool first = false;
if (dbb->dbb_filename.empty())
{
#if defined(DEV_BUILD) && defined(SUPERSERVER)
// make sure we do not reopen same DB twice
for (Database* d = databases; d; d = d->dbb_next)
{
if (d->dbb_filename == expanded_name)
{
fatal_exception::raise(("Attempt to reopen " + expanded_name).c_str());
}
}
#endif
first = true;
dbb->dbb_filename = expanded_name;
dbb->dbb_flags |= options.dpb_flags;
// NS: Use alias as database ID only if accessing database using file name is not possible.
//
// This way we:
// 1. Ensure uniqueness of ID even in presence of multiple processes
// 2. Make sure that ID value can be used to connect back to database
//
if (is_alias && vdn == VDN_FAIL)
dbb->dbb_database_name = file_name;
else
dbb->dbb_database_name = expanded_name;
PageSpace* pageSpace = dbb->dbb_page_manager.findPageSpace(DB_PAGE_SPACE);
pageSpace->file = PIO_open(dbb, expanded_name, file_name, false);
// Initialize the lock manager
dbb->dbb_lock_mgr = LockManager::create(dbb->getUniqueFileId());
LCK_init(tdbb, LCK_OWNER_database);
dbb->dbb_flags |= DBB_lck_init_done;
LCK_init(tdbb, LCK_OWNER_attachment);