/* ldbm.c - ldap dbm compatibility routines */
+/* $OpenLDAP$ */
+/*
+ * Copyright 1998-2000 The OpenLDAP Foundation, All Rights Reserved.
+ * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
+ */
-#include <stdio.h>
-#include "ldbm.h"
+/* Patched for Berkeley DB version 2.0; /KSp; 98/02/23
+ *
+ * - DB version 2.6.4b ; 1998/12/28, /KSp
+ * - DB_DBT_MALLOC ; 1998/03/22, /KSp
+ * - basic implementation; 1998/02/23, /KSp
+ */
-#ifdef LDBM_USE_GDBM
-
-#include <sys/types.h>
-#include <sys/stat.h>
+#include "portable.h"
-/*****************************************************************
- * *
- * use gdbm *
- * *
- *****************************************************************/
-
-LDBM
-ldbm_open( char *name, int rw, int mode, int dbcachesize )
-{
- LDBM db;
- struct stat st;
-
- if ( (db = gdbm_open( name, 0, rw | GDBM_FAST, mode, 0 )) == NULL ) {
- return( NULL );
- }
- if ( dbcachesize > 0 && stat( name, &st ) == 0 ) {
- dbcachesize = (dbcachesize / st.st_blksize);
- gdbm_setopt( db, GDBM_CACHESIZE, &dbcachesize, sizeof(int) );
- }
+#ifdef SLAPD_LDBM
- return( db );
-}
+#include <stdio.h>
-void
-ldbm_close( LDBM ldbm )
-{
- gdbm_close( ldbm );
-}
+#include <ac/stdlib.h>
+#include <ac/string.h>
+#include <ac/errno.h>
-void
-ldbm_sync( LDBM ldbm )
-{
- gdbm_sync( ldbm );
-}
+#include "ldbm.h"
+#include "ldap_pvt_thread.h"
void
ldbm_datum_free( LDBM ldbm, Datum data )
{
- free( data.dptr );
+ 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 ) )
- memcpy( dup.dptr, data.dptr, data.dsize );
+
+ if ( (dup.dptr = (char *) malloc( data.dsize )) != NULL ) {
+ AC_MEMCPY( dup.dptr, data.dptr, data.dsize );
+ }
return( dup );
}
-Datum
-ldbm_fetch( LDBM ldbm, Datum key )
+static int ldbm_initialized = 0;
+
+#ifdef HAVE_BERKELEY_DB_THREAD
+#define LDBM_LOCK ((void) 0)
+#define LDBM_UNLOCK ((void) 0)
+#else
+static ldap_pvt_thread_mutex_t ldbm_big_mutex;
+#define LDBM_LOCK (ldap_pvt_thread_mutex_lock(&ldbm_big_mutex))
+#define LDBM_UNLOCK (ldap_pvt_thread_mutex_unlock(&ldbm_big_mutex))
+#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 )
{
- return( gdbm_fetch( ldbm, key ) );
+ return( calloc( 1, size ));
}
-int
-ldbm_store( LDBM ldbm, Datum key, Datum data, int flags )
-{
- int rc;
+#ifdef LDAP_SYSLOG
+#include <ac/syslog.h>
+#endif
- rc = gdbm_store( ldbm, key, data, flags & ~LDBM_SYNC );
- if ( flags & LDBM_SYNC )
- gdbm_sync( ldbm );
- return( rc );
+static void
+ldbm_db_errcall( const char *prefix, char *message )
+{
+#ifdef LDAP_SYSLOG
+ syslog( LOG_INFO, "ldbm: %s %s", prefix, message );
+#endif
}
-int
-ldbm_delete( LDBM ldbm, Datum key )
+/* a dbEnv for BERKELEYv2 */
+DB_ENV *ldbm_Env = NULL;
+
+int ldbm_initialize( const char* home )
{
- int rc;
+ int err;
+ u_int32_t envFlags;
- rc = gdbm_delete( ldbm, key );
- gdbm_sync( ldbm );
- return( rc );
+ if(ldbm_initialized++) return 1;
+
+ {
+ char *version;
+ int major, minor, patch;
+ version = db_version( &major, &minor, &patch );
+
+ if( major != DB_VERSION_MAJOR ||
+ minor < DB_VERSION_MINOR )
+ {
+#ifdef LDAP_SYSLOG
+ char error[BUFSIZ];
+
+ sprintf( error, "%s (%d)\n", STRERROR( err ), err );
+
+ syslog( LOG_INFO,
+ "ldbm_initialize(): version mismatch\nexpected: %s\ngot: %s\n",
+ DB_VERSION_STRING,
+ version );
+#endif
+
+ return 1;
+ }
+ }
+
+#ifndef HAVE_BERKELEY_DB_THREAD
+ ldap_pvt_thread_mutex_init( &ldbm_big_mutex );
+#endif
+
+#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 = "==>";
+#else
+ ldbm_Env = NULL;
+#endif
+
+ envFlags = DB_CREATE;
+
+ /* add optional flags */
+#ifdef DB_PRIVATE
+ envFlags |= DB_PRIVATE;
+#endif
+
+#ifdef HAVE_BERKELEY_DB_THREAD
+ envFlags |= DB_THREAD | DB_INIT_CDB | DB_INIT_MPOOL;
+#ifdef DB_MPOOL_PRIVATE
+ envFlags |= DB_MPOOL_PRIVATE;
+#endif
+#endif
+
+#if DB_VERSION_MAJOR >= 3
+ err = db_env_create( &ldbm_Env, 0 );
+#else
+ envFlags |= DB_USE_ENVIRON;
+ err = db_appinit( home, NULL, ldbm_Env, envFlags );
+#endif
+
+ if ( err ) {
+#ifdef LDAP_SYSLOG
+ char error[BUFSIZ];
+
+ sprintf( error, "%s (%d)\n", STRERROR( err ), err );
+
+ syslog( LOG_INFO,
+#if DB_VERSION_MAJOR >= 3
+ "ldbm_initialize(): FATAL error in db_env_create() : %s\n",
+#else
+ "ldbm_initialize(): FATAL error in db_appinit() : %s\n",
+#endif
+ error );
+#endif
+ return( 1 );
+ }
+
+#if DB_VERSION_MAJOR > 2
+ ldbm_Env->set_errcall( ldbm_Env, ldbm_db_errcall );
+ ldbm_Env->set_errpfx( ldbm_Env, "==>" );
+
+#ifdef HAVE_BERKELEY_DB_THREAD
+ envFlags |= DB_INIT_CDB | DB_INIT_MPOOL;
+#endif
+ envFlags |= DB_USE_ENVIRON;
+
+#if (DB_VERSION_MAJOR > 3) || (DB_VERSION_MINOR >= 1)
+ err = ldbm_Env->open( ldbm_Env, home, envFlags, 0 );
+#else
+ err = ldbm_Env->open( ldbm_Env, home, NULL, envFlags, 0 );
+#endif
+
+ if ( err != 0 ) {
+#ifdef LDAP_SYSLOG
+ char error[BUFSIZ];
+
+ sprintf( error, "%s (%d)\n", STRERROR( err ), err );
+ syslog( LOG_INFO,
+ "ldbm_initialize(): FATAL error in dbEnv->open() : %s\n",
+ error );
+#endif
+ ldbm_Env->close( ldbm_Env, 0 );
+ return( 1 );
+ }
+#endif
+
+ return 0;
}
-Datum
-ldbm_firstkey( LDBM ldbm )
+int ldbm_shutdown( void )
{
- return( gdbm_firstkey( ldbm ) );
+ if( !ldbm_initialized ) return 1;
+
+#if DB_VERSION_MAJOR >= 3
+ ldbm_Env->close( ldbm_Env, 0 );
+#else
+ db_appexit( ldbm_Env );
+#endif
+
+#ifndef HAVE_BERKELEY_DB_THREAD
+ ldap_pvt_thread_mutex_destroy( &ldbm_big_mutex );
+#endif
+
+ return 0;
}
-Datum
-ldbm_nextkey( LDBM ldbm, Datum key )
+#else /* some DB other than Berkeley V2 or greater */
+
+int ldbm_initialize( const char * home )
{
- return( gdbm_nextkey( ldbm, key ) );
+ if(ldbm_initialized++) return 1;
+
+ ldap_pvt_thread_mutex_init( &ldbm_big_mutex );
+
+ return 0;
}
-int
-ldbm_errno( LDBM ldbm )
+int ldbm_shutdown( void )
{
- return( (int) gdbm_errno );
+ if( !ldbm_initialized ) return 1;
+
+ ldap_pvt_thread_mutex_destroy( &ldbm_big_mutex );
+
+ return 0;
}
-#else
+#endif /* HAVE_BERKELEY_DB */
+
+
#if defined( LDBM_USE_DBHASH ) || defined( LDBM_USE_DBBTREE )
/*****************************************************************
LDBM
ldbm_open( char *name, int rw, int mode, int dbcachesize )
{
- LDBM ret;
+ LDBM ret = NULL;
+
+#if DB_VERSION_MAJOR >= 3
+ int err;
+
+ LDBM_LOCK;
+
+ err = db_create( &ret, ldbm_Env, 0 );
+ if ( err != 0 ) {
+ (void)ret->close(ret, 0);
+ LDBM_UNLOCK;
+
+ return NULL;
+ }
+
+ ret->set_pagesize( ret, DEFAULT_DB_PAGE_SIZE );
+ ret->set_malloc( ret, ldbm_malloc );
+
+ err = ret->open( ret, name, NULL, DB_TYPE, rw, mode);
+
+ if ( err != 0 ) {
+ int tmp = errno;
+ (void)ret->close(ret, 0);
+ errno = tmp;
+
+ LDBM_UNLOCK;
+ return NULL;
+ }
+
+ LDBM_UNLOCK;
+
+#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_LOCK;
+ (void) db_open( name, DB_TYPE, rw, mode, ldbm_Env, &dbinfo, &ret );
+ LDBM_UNLOCK;
+
+#else
void *info;
BTREEINFO binfo;
HASHINFO hinfo;
} else {
info = NULL;
}
+
+ LDBM_LOCK;
ret = dbopen( name, rw, mode, DB_TYPE, info );
- return( ret );
+ LDBM_UNLOCK;
+#endif
+
+ return ret;
}
void
ldbm_close( LDBM ldbm )
{
+ LDBM_LOCK;
+#if DB_VERSION_MAJOR >= 3
+ ldbm->close( ldbm, 0 );
+#elif DB_VERSION_MAJOR >= 2
+ (*ldbm->close)( ldbm, 0 );
+#else
(*ldbm->close)( ldbm );
+#endif
+ LDBM_UNLOCK;
}
void
ldbm_sync( LDBM ldbm )
{
+ LDBM_LOCK;
(*ldbm->sync)( ldbm, 0 );
-}
-
-void
-ldbm_datum_free( LDBM ldbm, Datum data )
-{
- free( data.dptr );
+ LDBM_UNLOCK;
}
Datum
-ldbm_datum_dup( LDBM ldbm, Datum data )
+ldbm_fetch( LDBM ldbm, Datum key )
{
- Datum dup;
+ Datum data;
+ int rc;
- if ( data.dsize == 0 ) {
- dup.dsize = 0;
- dup.dptr = NULL;
+ LDBM_LOCK;
- return( dup );
+#if DB_VERSION_MAJOR >= 3
+ 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;
}
- dup.dsize = data.dsize;
- if ( dup.dptr = (char *) malloc( data.dsize ) )
- memcpy( dup.dptr, data.dptr, data.dsize );
- return( dup );
-}
+#elif DB_VERSION_MAJOR >= 2
+ ldbm_datum_init( data );
-Datum
-ldbm_fetch( LDBM ldbm, Datum key )
-{
- Datum data;
- int rc;
+ 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_UNLOCK;
return( data );
}
{
int rc;
+ LDBM_LOCK;
+
+#if DB_VERSION_MAJOR >= 3
+ rc = ldbm->put( ldbm, NULL, &key, &data, flags & ~LDBM_SYNC );
+ rc = (-1) * rc;
+
+#elif 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_UNLOCK;
+
return( rc );
}
{
int rc;
+ LDBM_LOCK;
+
+#if DB_VERSION_MAJOR >= 3
+ rc = ldbm->del( ldbm, NULL, &key, 0 );
+ rc = (-1) * rc;
+#elif 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_UNLOCK;
+
return( rc );
}
Datum
-ldbm_firstkey( LDBM ldbm )
+ldbm_firstkey( LDBM ldbm, LDBMCursor **dbch )
{
Datum key, data;
+
+#if DB_VERSION_MAJOR >= 2
+ LDBMCursor *dbci;
+
+ ldbm_datum_init( key );
+ ldbm_datum_init( data );
+
+ key.flags = data.flags = DB_DBT_MALLOC;
+
+ LDBM_LOCK;
+
+ /* acquire a cursor for the DB */
+# if DB_VERSION_MAJOR >= 3
+ if ( ldbm->cursor( ldbm, NULL, &dbci, 0 ) )
+# elif defined( DB_VERSION_MAJOR ) && defined( DB_VERSION_MINOR ) && \
+ (DB_VERSION_MAJOR == 2 && DB_VERSION_MINOR < 6)
+
+ if ( (*ldbm->cursor)( ldbm, NULL, &dbci ))
+
+# else
+ if ( (*ldbm->cursor)( ldbm, NULL, &dbci, 0 ))
+# endif
+ {
+ key.dptr = NULL;
+ return( key );
+ } else {
+ *dbch = dbci;
+ if ( (*dbci->c_get)( dbci, &key, &data, DB_NEXT ) == 0 ) {
+ ldbm_datum_free( ldbm, data );
+ }
+ else {
+#else
int rc;
+ LDBM_LOCK;
+
if ( (rc = (*ldbm->seq)( ldbm, &key, &data, R_FIRST )) == 0 ) {
key = ldbm_datum_dup( ldbm, key );
- } else {
+ }
+ else {
+#endif
key.dptr = NULL;
key.dsize = 0;
}
+
+#if DB_VERSION_MAJOR >= 2
+ }
+#endif
+
+ LDBM_UNLOCK;
+
return( key );
}
Datum
-ldbm_nextkey( LDBM ldbm, Datum key )
+ldbm_nextkey( LDBM ldbm, Datum key, LDBMCursor *dbcp )
{
Datum data;
+
+#if DB_VERSION_MAJOR >= 2
+ ldbm_datum_init( data );
+
+ ldbm_datum_free( ldbm, key );
+ key.flags = data.flags = DB_DBT_MALLOC;
+
+ LDBM_LOCK;
+
+ if ( (*dbcp->c_get)( dbcp, &key, &data, DB_NEXT ) == 0 ) {
+ ldbm_datum_free( ldbm, data );
+ }
+ else {
+#else
int rc;
+ LDBM_LOCK;
+
if ( (rc = (*ldbm->seq)( ldbm, &key, &data, R_NEXT )) == 0 ) {
key = ldbm_datum_dup( ldbm, key );
- } else {
+ }
+ else {
+#endif
key.dptr = NULL;
key.dsize = 0;
}
+
+ LDBM_UNLOCK;
+
return( key );
}
return( errno );
}
-#else
+/******************************************************************
+ * *
+ * END Berkeley section *
+ * *
+ ******************************************************************/
-#ifdef LDBM_USE_NDBM
+#elif defined( HAVE_GDBM )
+
+#ifdef HAVE_ST_BLKSIZE
+#include <sys/stat.h>
+#endif
/*****************************************************************
* *
- * if no gdbm, fall back to using ndbm, the standard unix thing *
+ * use gdbm *
* *
*****************************************************************/
-/* ARGSUSED */
LDBM
ldbm_open( char *name, int rw, int mode, int dbcachesize )
{
- return( dbm_open( name, rw, mode ) );
+ LDBM db;
+#ifdef HAVE_ST_BLKSIZE
+ struct stat st;
+#endif
+
+ LDBM_LOCK;
+
+ if ( (db = gdbm_open( name, 0, rw | GDBM_FAST, mode, 0 )) == NULL ) {
+ LDBM_UNLOCK;
+ return( NULL );
+ }
+
+#ifdef HAVE_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_UNLOCK;
+
+ return( db );
}
void
ldbm_close( LDBM ldbm )
{
- dbm_close( ldbm );
+ LDBM_LOCK;
+ gdbm_close( ldbm );
+ LDBM_UNLOCK;
}
-/* ARGSUSED */
void
ldbm_sync( LDBM ldbm )
{
- return;
+ LDBM_LOCK;
+ gdbm_sync( ldbm );
+ LDBM_UNLOCK;
+}
+
+Datum
+ldbm_fetch( LDBM ldbm, Datum key )
+{
+ Datum d;
+
+ LDBM_LOCK;
+ d = gdbm_fetch( ldbm, key );
+ LDBM_UNLOCK;
+
+ return d;
+}
+
+int
+ldbm_store( LDBM ldbm, Datum key, Datum data, int flags )
+{
+ int rc;
+
+ LDBM_LOCK;
+ rc = gdbm_store( ldbm, key, data, flags & ~LDBM_SYNC );
+ if ( flags & LDBM_SYNC )
+ gdbm_sync( ldbm );
+ LDBM_UNLOCK;
+
+ return( rc );
+}
+
+int
+ldbm_delete( LDBM ldbm, Datum key )
+{
+ int rc;
+
+ LDBM_LOCK;
+ rc = gdbm_delete( ldbm, key );
+ gdbm_sync( ldbm );
+ LDBM_UNLOCK;
+
+ return( rc );
+}
+
+Datum
+ldbm_firstkey( LDBM ldbm, LDBMCursor **dbcp )
+{
+ Datum d;
+
+ LDBM_LOCK;
+ d = gdbm_firstkey( ldbm );
+ LDBM_UNLOCK;
+
+ 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_LOCK;
+ d = gdbm_nextkey( ldbm, *dbcp );
+ LDBM_UNLOCK;
+
+ 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_LOCK;
+ err = gdbm_errno;
+ LDBM_UNLOCK;
+
+ 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( 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_LOCK; /* 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_UNLOCK;
+#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_UNLOCK;
+
+#ifdef MDBM_DEBUG
+ fprintf( stdout, "<==(mdbm)ldbm_open(db=%p)\n", db );
+ fflush( stdout );
+#endif
+
+ return( db );
+
}
+
+
+
void
-ldbm_datum_free( LDBM ldbm, Datum data )
+ldbm_close( LDBM ldbm )
{
- return;
+
+ /* 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_LOCK;
+ mdbm_close( ldbm );
+ LDBM_UNLOCK;
+
+#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_LOCK;
+ mdbm_sync( ldbm );
+ LDBM_UNLOCK;
+}
+
+
+#define MAX_MDBM_RETRY 5
+
Datum
-ldbm_datum_dup( LDBM ldbm, Datum data )
+ldbm_fetch( LDBM ldbm, Datum key )
{
- Datum dup;
+ Datum d;
+ kvpair k;
+ int retry = 0;
- if ( data.dsize == 0 ) {
- dup.dsize = 0;
- dup.dptr = NULL;
+ /* This hack is needed because MDBM does not take keys
+ * which begin with NULL when working in the chaining
+ * mode.
+ */
- return( dup );
+ /* LDBM_LOCK; */
+
+#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;
+
+ 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_UNLOCK; */
+
+#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_LOCK; */
+
+#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 );
}
- dup.dsize = data.dsize;
- if ( dup.dptr = (char *) malloc( data.dsize ) )
- memcpy( dup.dptr, data.dptr, data.dsize );
- return( dup );
+ /* LDBM_UNLOCK; */
+
+#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_LOCK; */
+
+#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_UNLOCK; */
+#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_LOCK; */
+
+ 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_UNLOCK; */
+
+ 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( char *name, int rw, int mode, int dbcachesize )
+{
+ LDBM ldbm;
+
+ LDBM_LOCK;
+ ldbm = dbm_open( name, rw, mode );
+ LDBM_UNLOCK;
+
+ return( ldbm );
+}
+
+void
+ldbm_close( LDBM ldbm )
+{
+ LDBM_LOCK;
+ dbm_close( ldbm );
+ LDBM_UNLOCK;
+}
+
+/* ARGSUSED */
+void
+ldbm_sync( LDBM ldbm )
+{
+ return;
}
Datum
ldbm_fetch( LDBM ldbm, Datum key )
{
- return( ldbm_datum_dup( ldbm, dbm_fetch( ldbm, key ) ) );
+ Datum d;
+
+ LDBM_LOCK;
+ d = ldbm_datum_dup( ldbm, dbm_fetch( ldbm, key ) );
+ LDBM_UNLOCK;
+
+ return d;
}
int
ldbm_store( LDBM ldbm, Datum key, Datum data, int flags )
{
- return( dbm_store( ldbm, key, data, flags ) );
+ int rc;
+
+ LDBM_LOCK;
+ rc = dbm_store( ldbm, key, data, flags );
+ LDBM_UNLOCK;
+
+ return rc;
}
int
ldbm_delete( LDBM ldbm, Datum key )
{
- return( dbm_delete( ldbm, key ) );
+ int rc;
+
+ LDBM_LOCK;
+ rc = dbm_delete( ldbm, key );
+ LDBM_UNLOCK;
+
+ return rc;
}
Datum
-ldbm_firstkey( LDBM ldbm )
+ldbm_firstkey( LDBM ldbm, LDBMCursor **dbcp )
{
- return( dbm_firstkey( ldbm ) );
+ Datum d;
+
+ LDBM_LOCK;
+ d = dbm_firstkey( ldbm );
+ LDBM_UNLOCK;
+
+ return d;
}
Datum
-ldbm_nextkey( LDBM ldbm, Datum key )
+ldbm_nextkey( LDBM ldbm, Datum key, LDBMCursor *dbcp )
{
- return( dbm_nextkey( ldbm ) );
+ Datum d;
+
+ LDBM_LOCK;
+ d = dbm_nextkey( ldbm );
+ LDBM_UNLOCK;
+
+ return d;
}
int
ldbm_errno( LDBM ldbm )
{
- return( dbm_error( ldbm ) );
+ int err;
+
+ LDBM_LOCK;
+ err = dbm_error( ldbm );
+ LDBM_UNLOCK;
+
+ return err;
}
#endif /* ndbm */
-#endif /* db */
-#endif /* gdbm */
+#endif /* ldbm */