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openldap/servers/slapd/back-ldbm/ldbm.c
Kurt Zeilenga 13accb8b28 Not sure why autoheader isn't doing its job...
2005-08-12 06:17:24 +00:00

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/* ldbm.c - ldap dbm compatibility routines */
/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 1998-2005 The OpenLDAP Foundation.
* Portions Copyright 1998-2003 Kurt D. Zeilenga.
* Portions Copyright 1998-2001 Net Boolean Incorporated.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted only as authorized by the OpenLDAP
* Public License.
*
* A copy of this license is available in the file LICENSE in the
* top-level directory of the distribution or, alternatively, at
* <http://www.OpenLDAP.org/license.html>.
*/
/* ACKNOWLEDGEMENTS:
* This work was originally developed by the University of Michigan
* (as part of U-MICH LDAP). Additional significant contributors
* include:
* Gary Williams
* Howard Chu
* Juan Gomez
* Kurt D. Zeilenga
* Kurt Spanier
* Mark Whitehouse
* Randy Kundee
*/
#include "portable.h"
#ifdef SLAPD_LDBM
#include <stdio.h>
#include <ac/stdlib.h>
#include <ac/string.h>
#include <ac/errno.h>
#include "ldbm.h"
#include "ldap_pvt_thread.h"
void
ldbm_datum_free( LDBM ldbm, Datum data )
{
if ( data.dptr ) {
free( data.dptr );
memset( &data, '\0', sizeof( Datum ));
data.dptr = NULL;
}
}
Datum
ldbm_datum_dup( LDBM ldbm, Datum data )
{
Datum dup;
ldbm_datum_init( dup );
if ( data.dsize == 0 ) {
dup.dsize = 0;
dup.dptr = NULL;
return( dup );
}
dup.dsize = data.dsize;
if ( (dup.dptr = (char *) malloc( data.dsize )) != NULL ) {
AC_MEMCPY( dup.dptr, data.dptr, data.dsize );
}
return( dup );
}
static int ldbm_initialized = 0;
#if defined( USE_BERKELEY_CDB )
/* not currently supported */
#define LDBM_RWLOCK_INIT ((void) 0)
#define LDBM_RWLOCK_DESTROY ((void) 0)
#define LDBM_WLOCK ((void) 0)
#define LDBM_WUNLOCK ((void) 0)
#define LDBM_RLOCK ((void) 0)
#define LDBM_RUNLOCK ((void) 0)
#elif defined( HAVE_BERKELEY_DB_THREAD )
static ldap_pvt_thread_rdwr_t ldbm_big_rdwr;
#define LDBM_RWLOCK_INIT (ldap_pvt_thread_rdwr_init( &ldbm_big_rdwr ))
#define LDBM_RWLOCK_DESTROY (ldap_pvt_thread_rdwr_destroy( &ldbm_big_rdwr ))
#define LDBM_WLOCK (ldap_pvt_thread_rdwr_wlock(&ldbm_big_rdwr))
#define LDBM_WUNLOCK (ldap_pvt_thread_rdwr_wunlock(&ldbm_big_rdwr))
#define LDBM_RLOCK (ldap_pvt_thread_rdwr_rlock(&ldbm_big_rdwr))
#define LDBM_RUNLOCK (ldap_pvt_thread_rdwr_runlock(&ldbm_big_rdwr))
#else
static ldap_pvt_thread_mutex_t ldbm_big_mutex;
#define LDBM_RWLOCK_INIT (ldap_pvt_thread_mutex_init( &ldbm_big_mutex ))
#define LDBM_RWLOCK_DESTROY (ldap_pvt_thread_mutex_destroy( &ldbm_big_mutex ))
#define LDBM_WLOCK (ldap_pvt_thread_mutex_lock(&ldbm_big_mutex))
#define LDBM_WUNLOCK (ldap_pvt_thread_mutex_unlock(&ldbm_big_mutex))
#define LDBM_RLOCK LDBM_WLOCK
#define LDBM_RUNLOCK LDBM_WUNLOCK
#endif
#if !defined( HAVE_BERKELEY_DB ) || (DB_VERSION_MAJOR < 3)
/* a dbEnv for BERKELEYv2 */
DB_ENV *ldbm_Env = NULL; /* real or fake, depending on db and version */
#endif
/* Let's make the version comparisons a little easier... */
#undef DB_VERSION_X
#ifdef HAVE_BERKELEY_DB
#define DB_VERSION_X ((DB_VERSION_MAJOR<<16)|(DB_VERSION_MINOR<<8)|DB_VERSION_PATCH)
#endif
/*******************************************************************
* *
* Create some special functions to initialize Berkeley DB for *
* versions greater than 2. *
* *
*******************************************************************/
#if defined( HAVE_BERKELEY_DB ) && (DB_VERSION_MAJOR >= 2)
void *
ldbm_malloc( size_t size )
{
/* likely should use ber_mem* routines */
return( calloc( 1, size ) );
}
#ifdef LDAP_SYSLOG
#include <ac/syslog.h>
#endif
static void
#if DB_VERSION_X < 0x040300
ldbm_db_errcall( const char *prefix, char *message )
#else
ldbm_db_errcall( const DB_ENV *env, const char *prefix, char *message )
#endif
{
#ifdef LDAP_SYSLOG
syslog( LOG_INFO, "ldbm: %s %s", prefix, message );
#endif
}
int ldbm_initialize( const char* home )
{
#if DB_VERSION_MAJOR < 3
int err;
u_int32_t envFlags;
#endif
if(ldbm_initialized++) return 1;
{
char *version;
#ifdef HAVE_EBCDIC
char v2[1024];
#endif
int major, minor, patch;
version = db_version( &major, &minor, &patch );
#ifdef HAVE_EBCDIC
strcpy( v2, version );
__etoa( v2 );
version = v2;
#endif
if( major != DB_VERSION_MAJOR ||
minor < DB_VERSION_MINOR )
{
#ifdef LDAP_SYSLOG
syslog( LOG_INFO,
"ldbm_initialize(): version mismatch\nexpected: %s\ngot: %s\n",
DB_VERSION_STRING, version );
#endif
return 1;
}
}
#if DB_VERSION_MAJOR < 3
ldbm_Env = calloc( 1, sizeof( DB_ENV ));
if( ldbm_Env == NULL ) return 1;
ldbm_Env->db_errcall = ldbm_db_errcall;
ldbm_Env->db_errpfx = "==>";
envFlags = DB_CREATE | DB_USE_ENVIRON;
/* add optional flags */
#ifdef DB_PRIVATE
envFlags |= DB_PRIVATE;
#endif
#ifdef HAVE_BERKELEY_DB_THREAD
envFlags |= DB_THREAD;
#endif
err = db_appinit( home, NULL, ldbm_Env, envFlags );
if ( err ) {
#ifdef LDAP_SYSLOG
syslog( LOG_INFO, "ldbm_initialize(): "
"FATAL error (%d) in db_appinit()\n", err );
#endif
return( 1 );
}
#endif
LDBM_RWLOCK_INIT;
return 0;
}
int ldbm_shutdown( void )
{
if( !ldbm_initialized ) return 1;
#if DB_VERSION_MAJOR < 3
db_appexit( ldbm_Env );
#endif
LDBM_RWLOCK_DESTROY;
return 0;
}
#else /* some DB other than Berkeley V2 or greater */
int ldbm_initialize( const char * home )
{
if(ldbm_initialized++) return 1;
LDBM_RWLOCK_INIT;
return 0;
}
int ldbm_shutdown( void )
{
if( !ldbm_initialized ) return 1;
LDBM_RWLOCK_DESTROY;
return 0;
}
#endif /* HAVE_BERKELEY_DB */
#if defined( HAVE_BERKELEY_DB ) && (DB_VERSION_MAJOR >= 3)
DB_ENV *ldbm_initialize_env(const char *home, int dbcachesize, int *envdirok)
{
DB_ENV *env = NULL;
int err;
u_int32_t envFlags;
#ifdef HAVE_EBCDIC
char n2[2048];
#endif
err = db_env_create( &env, 0 );
if ( err ) {
#ifdef LDAP_SYSLOG
syslog( LOG_INFO, "ldbm_initialize_env(): "
"FATAL error in db_env_create() : %s (%d)\n",
db_strerror( err ), err );
#endif
return NULL;
}
#if DB_VERSION_X >= 0x030300
/* This interface appeared in 3.3 */
env->set_alloc( env, ldbm_malloc, NULL, NULL );
#endif
env->set_errcall( env, ldbm_db_errcall );
env->set_errpfx( env, "==>" );
if (dbcachesize) {
env->set_cachesize( env, 0, dbcachesize, 0 );
}
envFlags = DB_CREATE | DB_INIT_MPOOL | DB_USE_ENVIRON;
#ifdef DB_PRIVATE
envFlags |= DB_PRIVATE;
#endif
#ifdef DB_MPOOL_PRIVATE
envFlags |= DB_MPOOL_PRIVATE;
#endif
#ifdef HAVE_BERKELEY_DB_THREAD
envFlags |= DB_THREAD;
#endif
#ifdef HAVE_EBCDIC
strncpy(n2, home, sizeof(n2)-1);
n2[sizeof(n2)-1] = '\0';
__atoe(n2);
home = n2;
#endif
#if DB_VERSION_X >= 0x030100
err = env->open( env, home, envFlags, 0 );
#else
/* 3.0.x requires an extra argument */
err = env->open( env, home, NULL, envFlags, 0 );
#endif
if ( err != 0 ) {
#ifdef LDAP_SYSLOG
syslog( LOG_INFO, "ldbm_initialize_env(): "
"FATAL error in dbEnv->open() : %s (%d)\n",
db_strerror( err ), err );
#endif
env->close( env, 0 );
return NULL;
}
*envdirok = 1;
return env;
}
void ldbm_shutdown_env(DB_ENV *env)
{
env->close( env, 0 );
}
#else
DB_ENV *ldbm_initialize_env(const char *home, int dbcachesize, int *envdirok)
{
return ldbm_Env;
}
void ldbm_shutdown_env(DB_ENV *env)
{
}
#endif
#if defined( LDBM_USE_DBHASH ) || defined( LDBM_USE_DBBTREE )
/*****************************************************************
* *
* use berkeley db hash or btree package *
* *
*****************************************************************/
LDBM
ldbm_open( DB_ENV *env, char *name, int rw, int mode, int dbcachesize )
{
LDBM ret = NULL;
#ifdef HAVE_EBCDIC
char n2[2048];
#endif
#if DB_VERSION_MAJOR >= 3
int err;
LDBM_WLOCK;
err = db_create( &ret, env, 0 );
if ( err != 0 ) {
(void)ret->close(ret, 0);
LDBM_WUNLOCK;
return NULL;
}
#if DB_VERSION_X < 0x030300
ret->set_malloc( ret, ldbm_malloc );
#endif
ret->set_pagesize( ret, DEFAULT_DB_PAGE_SIZE );
/* likely should use ber_mem* routines */
#ifdef HAVE_EBCDIC
strncpy(n2, name, sizeof(n2)-1);
n2[sizeof(n2)-1] = '\0';
__atoe(n2);
name = n2;
#endif
#if DB_VERSION_X >= 0x040111
err = ret->open( ret, NULL, name, NULL, DB_TYPE, rw, mode);
#else
err = ret->open( ret, name, NULL, DB_TYPE, rw, mode);
#endif
if ( err != 0 ) {
int tmp = errno;
(void)ret->close(ret, 0);
errno = tmp;
LDBM_WUNLOCK;
return NULL;
}
LDBM_WUNLOCK;
#elif DB_VERSION_MAJOR >= 2
DB_INFO dbinfo;
memset( &dbinfo, '\0', sizeof( dbinfo ));
#if DB_VERSION_MAJOR == 2 && DB_VERSION_MINOR == 4
/*
* BerkeleyDB 2.4 do not allow db_cachesize
* to be specified if an DB_ENV is.
*/
#else
/* set db_cachesize of MPOOL is NOT being used. */
if (( ldbm_Env == NULL ) || ( ldbm_Env->mp_info == NULL )) {
dbinfo.db_cachesize = dbcachesize;
}
#endif
dbinfo.db_pagesize = DEFAULT_DB_PAGE_SIZE;
dbinfo.db_malloc = ldbm_malloc;
LDBM_WLOCK;
(void) db_open( name, DB_TYPE, rw, mode, ldbm_Env, &dbinfo, &ret );
LDBM_WUNLOCK;
#else
void *info;
BTREEINFO binfo;
HASHINFO hinfo;
if ( DB_TYPE == DB_HASH ) {
memset( (char *) &hinfo, '\0', sizeof(hinfo) );
hinfo.cachesize = dbcachesize;
info = &hinfo;
} else if ( DB_TYPE == DB_BTREE ) {
memset( (char *) &binfo, '\0', sizeof(binfo) );
binfo.cachesize = dbcachesize;
info = &binfo;
} else {
info = NULL;
}
LDBM_WLOCK;
ret = dbopen( name, rw, mode, DB_TYPE, info );
LDBM_WUNLOCK;
#endif
return ret;
}
void
ldbm_close( LDBM ldbm )
{
LDBM_WLOCK;
#if DB_VERSION_MAJOR >= 2
ldbm->close( ldbm, 0 );
#else
ldbm->close( ldbm );
#endif
LDBM_WUNLOCK;
}
void
ldbm_sync( LDBM ldbm )
{
LDBM_WLOCK;
(*ldbm->sync)( ldbm, 0 );
LDBM_WUNLOCK;
}
Datum
ldbm_fetch( LDBM ldbm, Datum key )
{
Datum data;
int rc;
LDBM_RLOCK;
#if DB_VERSION_MAJOR >= 2
ldbm_datum_init( data );
data.flags = DB_DBT_MALLOC;
if ( (rc = ldbm->get( ldbm, NULL, &key, &data, 0 )) != 0 ) {
ldbm_datum_free( ldbm, data );
data.dptr = NULL;
data.dsize = 0;
}
#else
if ( (rc = ldbm->get( ldbm, &key, &data, 0 )) == 0 ) {
/* Berkeley DB 1.85 don't malloc the data for us */
/* duplicate it for to ensure reentrancy */
data = ldbm_datum_dup( ldbm, data );
} else {
data.dptr = NULL;
data.dsize = 0;
}
#endif
LDBM_RUNLOCK;
return( data );
}
int
ldbm_store( LDBM ldbm, Datum key, Datum data, int flags )
{
int rc;
LDBM_WLOCK;
#if DB_VERSION_MAJOR >= 2
rc = ldbm->put( ldbm, NULL, &key, &data, flags & ~LDBM_SYNC );
rc = (-1) * rc;
#else
rc = ldbm->put( ldbm, &key, &data, flags & ~LDBM_SYNC );
#endif
if ( flags & LDBM_SYNC )
ldbm->sync( ldbm, 0 );
LDBM_WUNLOCK;
return( rc );
}
int
ldbm_delete( LDBM ldbm, Datum key )
{
int rc;
LDBM_WLOCK;
#if DB_VERSION_MAJOR >= 2
rc = ldbm->del( ldbm, NULL, &key, 0 );
rc = (-1) * rc;
#else
rc = ldbm->del( ldbm, &key, 0 );
#endif
ldbm->sync( ldbm, 0 );
LDBM_WUNLOCK;
return( rc );
}
Datum
ldbm_firstkey( LDBM ldbm, LDBMCursor **dbch )
{
Datum key, data;
int rc;
#if DB_VERSION_MAJOR >= 2
LDBMCursor *dbci;
ldbm_datum_init( key );
ldbm_datum_init( data );
key.flags = data.flags = DB_DBT_MALLOC;
LDBM_RLOCK;
/* acquire a cursor for the DB */
# if DB_VERSION_X >= 0x020600
rc = ldbm->cursor( ldbm, NULL, &dbci, 0 );
# else
rc = ldbm->cursor( ldbm, NULL, &dbci );
# endif
if( rc ) {
key.dptr = NULL;
} else {
*dbch = dbci;
if ( dbci->c_get( dbci, &key, &data, DB_NEXT ) == 0 ) {
ldbm_datum_free( ldbm, data );
} else {
key.dptr = NULL;
key.dsize = 0;
}
}
LDBM_RUNLOCK;
#else
LDBM_RLOCK;
rc = ldbm->seq( ldbm, &key, &data, R_FIRST );
if ( rc == 0 ) {
key = ldbm_datum_dup( ldbm, key );
} else {
key.dptr = NULL;
key.dsize = 0;
}
LDBM_RUNLOCK;
#endif
return( key );
}
Datum
ldbm_nextkey( LDBM ldbm, Datum key, LDBMCursor *dbcp )
{
int rc;
Datum data;
LDBM_RLOCK;
#if DB_VERSION_MAJOR >= 2
ldbm_datum_init( data );
ldbm_datum_free( ldbm, key );
key.flags = data.flags = DB_DBT_MALLOC;
rc = dbcp->c_get( dbcp, &key, &data, DB_NEXT );
if ( rc == 0 ) {
ldbm_datum_free( ldbm, data );
} else
#else
rc = ldbm->seq( ldbm, &key, &data, R_NEXT );
if ( rc == 0 ) {
key = ldbm_datum_dup( ldbm, key );
} else
#endif
{
key.dptr = NULL;
key.dsize = 0;
}
LDBM_RUNLOCK;
return( key );
}
int
ldbm_errno( LDBM ldbm )
{
return( errno );
}
/******************************************************************
* *
* END Berkeley section *
* *
******************************************************************/
#elif defined( HAVE_GDBM )
#ifdef HAVE_STRUCT_STAT_ST_BLKSIZE
#include <sys/stat.h>
#endif
/*****************************************************************
* *
* use gdbm *
* *
*****************************************************************/
LDBM
ldbm_open( DB_ENV *env, char *name, int rw, int mode, int dbcachesize )
{
LDBM db;
#ifdef HAVE_STRUCT_STAT_ST_BLKSIZE
struct stat st;
#endif
#ifdef HAVE_EBCDIC
char n2[2048];
strncpy(n2, name, sizeof(n2)-1);
n2[sizeof(n2)-1] = '\0';
__atoe(n2);
name = n2;
#endif
LDBM_WLOCK;
if ( (db = gdbm_open( name, 0, rw | GDBM_FAST, mode, 0 )) == NULL ) {
LDBM_WUNLOCK;
return( NULL );
}
#ifdef HAVE_STRUCT_STAT_ST_BLKSIZE
if ( dbcachesize > 0 && stat( name, &st ) == 0 ) {
dbcachesize /= st.st_blksize;
if( dbcachesize == 0 ) dbcachesize = 1;
gdbm_setopt( db, GDBM_CACHESIZE, &dbcachesize, sizeof(int) );
}
#else
if ( dbcachesize > 0 ) {
dbcachesize /= 4096;
if( dbcachesize == 0 ) dbcachesize = 1;
gdbm_setopt( db, GDBM_CACHESIZE, &dbcachesize, sizeof(int) );
}
#endif
LDBM_WUNLOCK;
return( db );
}
void
ldbm_close( LDBM ldbm )
{
LDBM_WLOCK;
gdbm_close( ldbm );
LDBM_WUNLOCK;
}
void
ldbm_sync( LDBM ldbm )
{
LDBM_WLOCK;
gdbm_sync( ldbm );
LDBM_WUNLOCK;
}
Datum
ldbm_fetch( LDBM ldbm, Datum key )
{
Datum d;
LDBM_RLOCK;
d = gdbm_fetch( ldbm, key );
LDBM_RUNLOCK;
return d;
}
int
ldbm_store( LDBM ldbm, Datum key, Datum data, int flags )
{
int rc;
LDBM_WLOCK;
rc = gdbm_store( ldbm, key, data, flags & ~LDBM_SYNC );
if ( flags & LDBM_SYNC )
gdbm_sync( ldbm );
LDBM_WUNLOCK;
return( rc );
}
int
ldbm_delete( LDBM ldbm, Datum key )
{
int rc;
LDBM_WLOCK;
rc = gdbm_delete( ldbm, key );
gdbm_sync( ldbm );
LDBM_WUNLOCK;
return( rc );
}
Datum
ldbm_firstkey( LDBM ldbm, LDBMCursor **dbcp )
{
Datum d;
LDBM_RLOCK;
d = gdbm_firstkey( ldbm );
LDBM_RUNLOCK;
if ( d.dptr != NULL ) {
*dbcp = (Datum *) malloc( sizeof( Datum ) );
**dbcp = ldbm_datum_dup( ldbm, d );
}
return d;
}
Datum
ldbm_nextkey( LDBM ldbm, Datum key, LDBMCursor *dbcp )
{
Datum d;
LDBM_RLOCK;
d = gdbm_nextkey( ldbm, *dbcp );
LDBM_RUNLOCK;
ldbm_datum_free( ldbm, *dbcp );
if ( d.dptr != NULL ) {
*dbcp = ldbm_datum_dup( ldbm, d );
} else {
free( dbcp );
}
return d;
}
int
ldbm_errno( LDBM ldbm )
{
int err;
LDBM_WLOCK;
err = gdbm_errno;
LDBM_WUNLOCK;
return( err );
}
#elif HAVE_MDBM
/* MMAPED DBM HASHING DATABASE */
#include <ac/string.h>
/* #define MDBM_DEBUG */
#ifdef MDBM_DEBUG
#include <stdio.h>
#endif
#define NO_NULL_KEY
/* #define MDBM_CHAIN */
#ifdef MDBM_CHAIN
/* Use chaining */
#define mdbm_store mdbm_chain_store
#define mdbm_fetch mdbm_chain_fetch
#define mdbm_delete mdbm_chain_delete
#define mdbm_first mdbm_chain_first
#define mdbm_next mdbm_chain_next
#endif
#define MDBM_PG_SZ (4*1024)
/*****************************************************************
* *
* use mdbm *
* *
*****************************************************************/
LDBM
ldbm_open( DB_ENV *env, char *name, int rw, int mode, int dbcachesize )
{
LDBM db;
#ifdef MDBM_DEBUG
fprintf( stdout,
"==>(mdbm)ldbm_open(name=%s,rw=%x,mode=%x,cachesize=%d)\n",
name ? name : "NULL", rw, mode, dbcachesize );
fflush( stdout );
#endif
LDBM_WLOCK; /* We need locking here, this is the only non-thread
* safe function we have. */
if ( (db = mdbm_open( name, rw, mode, MDBM_PG_SZ )) == NULL ) {
LDBM_WUNLOCK;
#ifdef MDBM_DEBUG
fprintf( stdout, "<==(mdbm)ldbm_open(db=NULL)\n" );
fflush( stdout );
#endif
return( NULL );
}
#ifdef MDBM_CHAIN
(void)mdbm_set_chain(db);
#endif
LDBM_WUNLOCK;
#ifdef MDBM_DEBUG
fprintf( stdout, "<==(mdbm)ldbm_open(db=%p)\n", db );
fflush( stdout );
#endif
return( db );
}
void
ldbm_close( LDBM ldbm )
{
/* Open and close are not reentrant so we need to use locks here */
#ifdef MDBM_DEBUG
fprintf( stdout,
"==>(mdbm)ldbm_close(db=%p)\n", ldbm );
fflush( stdout );
#endif
LDBM_WLOCK;
mdbm_close( ldbm );
LDBM_WUNLOCK;
#ifdef MDBM_DEBUG
fprintf( stdout, "<==(mdbm)ldbm_close()\n" );
fflush( stdout );
#endif
}
void
ldbm_sync( LDBM ldbm )
{
/* XXX: Not sure if this is re-entrant need to check code, if so
* you can leave LOCKS out.
*/
LDBM_WLOCK;
mdbm_sync( ldbm );
LDBM_WUNLOCK;
}
#define MAX_MDBM_RETRY 5
Datum
ldbm_fetch( LDBM ldbm, Datum key )
{
Datum d;
kvpair k;
int retry = 0;
/* This hack is needed because MDBM does not take keys
* which begin with NULL when working in the chaining
* mode.
*/
#ifdef NO_NULL_KEY
k.key.dsize = key.dsize + 1;
k.key.dptr = malloc(k.key.dsize);
*(k.key.dptr) = 'l';
AC_MEMCPY( (void *)(k.key.dptr + 1), key.dptr, key.dsize );
#else
k.key = key;
#endif
k.val.dptr = NULL;
k.val.dsize = 0;
/* LDBM_RLOCK; */
do {
d = mdbm_fetch( ldbm, k );
if ( d.dsize > 0 ) {
if ( k.val.dptr != NULL ) {
free( k.val.dptr );
}
if ( (k.val.dptr = malloc( d.dsize )) != NULL ) {
k.val.dsize = d.dsize;
d = mdbm_fetch( ldbm, k );
} else {
d.dsize = 0;
break;
}
}/* if ( d.dsize > 0 ) */
} while ((d.dsize > k.val.dsize) && (++retry < MAX_MDBM_RETRY));
/* LDBM_RUNLOCK; */
#ifdef NO_NULL_KEY
free(k.key.dptr);
#endif
return d;
}
int
ldbm_store( LDBM ldbm, Datum key, Datum data, int flags )
{
int rc;
Datum int_key; /* Internal key */
#ifdef MDBM_DEBUG
fprintf( stdout,
"==>(mdbm)ldbm_store(db=%p, key(dptr=%p,sz=%d), data(dptr=%p,sz=%d), flags=%x)\n",
ldbm, key.dptr, key.dsize, data.dptr, data.dsize, flags );
fflush( stdout );
#endif
/* LDBM_WLOCK; */
#ifdef NO_NULL_KEY
int_key.dsize = key.dsize + 1;
int_key.dptr = malloc( int_key.dsize );
*(int_key.dptr) = 'l'; /* Must not be NULL !*/
AC_MEMCPY( (void *)(int_key.dptr + 1), key.dptr, key.dsize );
#else
int_key = key;
#endif
rc = mdbm_store( ldbm, int_key, data, flags );
if ( flags & LDBM_SYNC ) {
mdbm_sync( ldbm );
}
/* LDBM_WUNLOCK; */
#ifdef MDBM_DEBUG
fprintf( stdout, "<==(mdbm)ldbm_store(rc=%d)\n", rc );
fflush( stdout );
#endif
#ifdef NO_NULL_KEY
free(int_key.dptr);
#endif
return( rc );
}
int
ldbm_delete( LDBM ldbm, Datum key )
{
int rc;
Datum int_key;
/* LDBM_WLOCK; */
#ifdef NO_NULL_KEY
int_key.dsize = key.dsize + 1;
int_key.dptr = malloc(int_key.dsize);
*(int_key.dptr) = 'l';
AC_MEMCPY( (void *)(int_key.dptr + 1), key.dptr, key.dsize );
#else
int_key = key;
#endif
rc = mdbm_delete( ldbm, int_key );
/* LDBM_WUNLOCK; */
#ifdef NO_NULL_KEY
free(int_key.dptr);
#endif
return( rc );
}
static Datum
ldbm_get_next( LDBM ldbm, kvpair (*fptr)(MDBM *, kvpair) )
{
kvpair out;
kvpair in;
Datum ret;
size_t sz = MDBM_PAGE_SIZE(ldbm);
#ifdef NO_NULL_KEY
int delta = 1;
#else
int delta = 0;
#endif
/* LDBM_RLOCK; */
in.key.dsize = sz; /* Assume first key in one pg */
in.key.dptr = malloc(sz);
in.val.dptr = NULL; /* Don't need data just key */
in.val.dsize = 0;
ret.dptr = NULL;
ret.dsize = NULL;
out = fptr( ldbm, in );
if (out.key.dsize > 0) {
ret.dsize = out.key.dsize - delta;
if ((ret.dptr = (char *)malloc(ret.dsize)) == NULL) {
ret.dsize = 0;
ret.dptr = NULL;
} else {
AC_MEMCPY(ret.dptr, (void *)(out.key.dptr + delta),
ret.dsize );
}
}
/* LDBM_RUNLOCK; */
free(in.key.dptr);
return ret;
}
Datum
ldbm_firstkey( LDBM ldbm, LDBMCursor **dbcp )
{
return ldbm_get_next( ldbm, mdbm_first );
}
Datum
ldbm_nextkey( LDBM ldbm, Datum key, LDBMCursor *dbcp )
{
/* XXX:
* don't know if this will affect the LDAP server operation
* but mdbm cannot take and input key.
*/
return ldbm_get_next( ldbm, mdbm_next );
}
int
ldbm_errno( LDBM ldbm )
{
/* XXX: best we can do with current mdbm interface */
return( errno );
}
#elif defined( HAVE_NDBM )
/*****************************************************************
* *
* if no gdbm or mdbm, fall back to using ndbm, the standard unix thing *
* *
*****************************************************************/
/* ARGSUSED */
LDBM
ldbm_open( DB_ENV *env, char *name, int rw, int mode, int dbcachesize )
{
LDBM ldbm;
LDBM_WLOCK;
ldbm = dbm_open( name, rw, mode );
LDBM_WUNLOCK;
return( ldbm );
}
void
ldbm_close( LDBM ldbm )
{
LDBM_WLOCK;
dbm_close( ldbm );
LDBM_WUNLOCK;
}
/* ARGSUSED */
void
ldbm_sync( LDBM ldbm )
{
return;
}
Datum
ldbm_fetch( LDBM ldbm, Datum key )
{
Datum d;
LDBM_RLOCK;
d = ldbm_datum_dup( ldbm, dbm_fetch( ldbm, key ) );
LDBM_RUNLOCK;
return d;
}
int
ldbm_store( LDBM ldbm, Datum key, Datum data, int flags )
{
int rc;
LDBM_WLOCK;
rc = dbm_store( ldbm, key, data, flags );
LDBM_WUNLOCK;
return rc;
}
int
ldbm_delete( LDBM ldbm, Datum key )
{
int rc;
LDBM_WLOCK;
rc = dbm_delete( ldbm, key );
LDBM_WUNLOCK;
return rc;
}
Datum
ldbm_firstkey( LDBM ldbm, LDBMCursor **dbcp )
{
Datum d;
LDBM_RLOCK;
d = dbm_firstkey( ldbm );
LDBM_RUNLOCK;
return d;
}
Datum
ldbm_nextkey( LDBM ldbm, Datum key, LDBMCursor *dbcp )
{
Datum d;
LDBM_RLOCK;
d = dbm_nextkey( ldbm );
LDBM_RUNLOCK;
return d;
}
int
ldbm_errno( LDBM ldbm )
{
int err;
LDBM_WLOCK;
err = dbm_error( ldbm );
LDBM_WUNLOCK;
return err;
}
#endif /* ndbm */
#endif /* ldbm */
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