1 /* ldbm.c - ldap dbm compatibility routines */
3 /* Patched for Berkeley DB version 2.0; /KSp; 98/02/23
5 * - DB version 2.6.4b ; 1998/12/28, /KSp
6 * - DB_DBT_MALLOC ; 1998/03/22, /KSp
7 * - basic implementation; 1998/02/23, /KSp
16 #include <ac/string.h>
20 #include "ldap_pvt_thread.h"
24 ldbm_datum_free( LDBM ldbm, Datum data )
28 memset( &data, 0, sizeof( Datum ));
34 ldbm_datum_dup( LDBM ldbm, Datum data )
38 ldbm_datum_init( dup );
40 if ( data.dsize == 0 ) {
46 dup.dsize = data.dsize;
47 if ( (dup.dptr = (char *) malloc( data.dsize )) != NULL )
48 memcpy( dup.dptr, data.dptr, data.dsize );
53 static int ldbm_initialized = 0;
55 #ifndef HAVE_BERKELEY_DB2
56 /* Everything but DB2 is non-reentrant */
58 static ldap_pvt_thread_mutex_t ldbm_big_mutex;
59 #define LDBM_LOCK (ldap_pvt_thread_mutex_lock(&ldbm_big_mutex))
60 #define LDBM_UNLOCK (ldap_pvt_thread_mutex_unlock(&ldbm_big_mutex))
62 int ldbm_initialize( void )
64 if(ldbm_initialized++) return 1;
66 ldap_pvt_thread_mutex_init( &ldbm_big_mutex );
71 int ldbm_shutdown( void )
73 if( !ldbm_initialized ) return 1;
75 ldap_pvt_thread_mutex_destroy( &ldbm_big_mutex );
87 extern int syslog(int, char*, ...);
91 ldbm_malloc( size_t size )
93 return( calloc( 1, size ));
97 ldbm_db_errcall( const char *prefix, char *message )
99 syslog( LOG_INFO, "ldbm_db_errcall(): %s %s", prefix, message );
102 /* a dbEnv for BERKELEYv2 */
103 static DB_ENV ldbm_Env_internal;
104 DB_ENV *ldbm_Env = NULL;
106 /* Berkeley DB 2.x is reentrant */
107 #define LDBM_LOCK ((void)0)
108 #define LDBM_UNLOCK ((void)0)
110 int ldbm_initialize( void )
115 if(ldbm_initialized++) return 1;
117 memset( &ldbm_Env_internal, 0, sizeof( DB_ENV ));
118 ldbm_Env = &ldbm_Env_internal;
120 ldbm_Env->db_errcall = ldbm_db_errcall;
121 ldbm_Env->db_errpfx = "==>";
123 envFlags = DB_CREATE | DB_THREAD;
125 if ( ( err = db_appinit( NULL, NULL, ldbm_Env, envFlags )) ) {
129 sprintf( error, "%ld\n", (long) err );
131 sprintf( error, "%s\n", strerror( err ));
135 "ldbm_initialize(): FATAL error in db_appinit() : %s\n",
143 int ldbm_shutdown( void )
145 if( !ldbm_initialized ) return 1;
147 db_appexit( ldbm_Env );
154 #if defined( LDBM_USE_DBHASH ) || defined( LDBM_USE_DBBTREE )
156 /*****************************************************************
158 * use berkeley db hash or btree package *
160 *****************************************************************/
163 ldbm_open( char *name, int rw, int mode, int dbcachesize )
167 #ifdef HAVE_BERKELEY_DB2
170 memset( &dbinfo, 0, sizeof( dbinfo ));
171 if (( ldbm_Env == NULL ) || ( ldbm_Env->mp_info == NULL ))
172 dbinfo.db_cachesize = dbcachesize;
173 dbinfo.db_pagesize = DEFAULT_DB_PAGE_SIZE;
174 dbinfo.db_malloc = ldbm_malloc;
177 (void) db_open( name, DB_TYPE, rw, mode, ldbm_Env, &dbinfo, &ret );
185 if ( DB_TYPE == DB_HASH ) {
186 memset( (char *) &hinfo, '\0', sizeof(hinfo) );
187 hinfo.cachesize = dbcachesize;
189 } else if ( DB_TYPE == DB_BTREE ) {
190 memset( (char *) &binfo, '\0', sizeof(binfo) );
191 binfo.cachesize = dbcachesize;
198 ret = dbopen( name, rw, mode, DB_TYPE, info );
207 ldbm_close( LDBM ldbm )
210 #ifdef HAVE_BERKELEY_DB2
211 (*ldbm->close)( ldbm, 0 );
213 (*ldbm->close)( ldbm );
219 ldbm_sync( LDBM ldbm )
222 (*ldbm->sync)( ldbm, 0 );
227 ldbm_fetch( LDBM ldbm, Datum key )
234 #ifdef HAVE_BERKELEY_DB2
235 ldbm_datum_init( data );
237 data.flags = DB_DBT_MALLOC;
239 if ( (rc = (*ldbm->get)( ldbm, NULL, &key, &data, 0 )) != 0 ) {
240 ldbm_datum_free( ldbm, data );
242 if ( (rc = (*ldbm->get)( ldbm, &key, &data, 0 )) == 0 ) {
243 /* Berkeley DB 1.85 don't malloc the data for us */
244 /* duplicate it for to ensure reentrancy */
245 data = ldbm_datum_dup( ldbm, data );
258 ldbm_store( LDBM ldbm, Datum key, Datum data, int flags )
264 #ifdef HAVE_BERKELEY_DB2
265 rc = (*ldbm->put)( ldbm, NULL, &key, &data, flags & ~LDBM_SYNC );
268 rc = (*ldbm->put)( ldbm, &key, &data, flags & ~LDBM_SYNC );
271 if ( flags & LDBM_SYNC )
272 (*ldbm->sync)( ldbm, 0 );
280 ldbm_delete( LDBM ldbm, Datum key )
286 #ifdef HAVE_BERKELEY_DB2
287 rc = (*ldbm->del)( ldbm, NULL, &key, 0 );
290 rc = (*ldbm->del)( ldbm, &key, 0 );
292 (*ldbm->sync)( ldbm, 0 );
300 #ifdef HAVE_BERKELEY_DB2
301 ldbm_firstkey( LDBM ldbm, DBC **dbch )
303 ldbm_firstkey( LDBM ldbm )
308 #ifdef HAVE_BERKELEY_DB2
311 ldbm_datum_init( key );
312 ldbm_datum_init( data );
314 key.flags = data.flags = DB_DBT_MALLOC;
318 /* acquire a cursor for the DB */
320 # if defined( DB_VERSION_MAJOR ) && defined( DB_VERSION_MINOR ) && \
321 DB_VERSION_MAJOR == 2 && DB_VERSION_MINOR < 6
323 if ( (*ldbm->cursor)( ldbm, NULL, &dbci ))
326 if ( (*ldbm->cursor)( ldbm, NULL, &dbci, 0 ))
333 if ( (*dbci->c_get)( dbci, &key, &data, DB_NEXT ) == 0 ) {
334 ldbm_datum_free( ldbm, data );
342 if ( (rc = (*ldbm->seq)( ldbm, &key, &data, R_FIRST )) == 0 ) {
343 key = ldbm_datum_dup( ldbm, key );
351 #ifdef HAVE_BERKELEY_DB2
361 #ifdef HAVE_BERKELEY_DB2
362 ldbm_nextkey( LDBM ldbm, Datum key, DBC *dbcp )
364 ldbm_nextkey( LDBM ldbm, Datum key )
369 #ifdef HAVE_BERKELEY_DB2
370 ldbm_datum_init( data );
372 ldbm_datum_free( ldbm, key );
373 key.flags = data.flags = DB_DBT_MALLOC;
377 if ( (*dbcp->c_get)( dbcp, &key, &data, DB_NEXT ) == 0 ) {
378 ldbm_datum_free( ldbm, data );
386 if ( (rc = (*ldbm->seq)( ldbm, &key, &data, R_NEXT )) == 0 ) {
387 key = ldbm_datum_dup( ldbm, key );
401 ldbm_errno( LDBM ldbm )
406 #elif defined( HAVE_GDBM )
408 #include <sys/stat.h>
410 /*****************************************************************
414 *****************************************************************/
417 ldbm_open( char *name, int rw, int mode, int dbcachesize )
424 if ( (db = gdbm_open( name, 0, rw | GDBM_FAST, mode, 0 )) == NULL ) {
428 if ( dbcachesize > 0 && stat( name, &st ) == 0 ) {
429 dbcachesize = (dbcachesize / st.st_blksize);
430 gdbm_setopt( db, GDBM_CACHESIZE, &dbcachesize, sizeof(int) );
439 ldbm_close( LDBM ldbm )
447 ldbm_sync( LDBM ldbm )
455 ldbm_fetch( LDBM ldbm, Datum key )
460 d = gdbm_fetch( ldbm, key );
467 ldbm_store( LDBM ldbm, Datum key, Datum data, int flags )
472 rc = gdbm_store( ldbm, key, data, flags & ~LDBM_SYNC );
473 if ( flags & LDBM_SYNC )
481 ldbm_delete( LDBM ldbm, Datum key )
486 rc = gdbm_delete( ldbm, key );
494 ldbm_firstkey( LDBM ldbm )
499 d = gdbm_firstkey( ldbm );
506 ldbm_nextkey( LDBM ldbm, Datum key )
511 d = gdbm_nextkey( ldbm, key );
518 ldbm_errno( LDBM ldbm )
531 /* MMAPED DBM HASHING DATABASE */
536 /* #define MDBM_DEBUG */
543 /* #define MDBM_CHAIN */
550 #define mdbm_store mdbm_chain_store
551 #define mdbm_fetch mdbm_chain_fetch
552 #define mdbm_delete mdbm_chain_delete
553 #define mdbm_first mdbm_chain_first
554 #define mdbm_next mdbm_chain_next
558 #define MDBM_PG_SZ (4*1024)
560 /*****************************************************************
564 *****************************************************************/
567 ldbm_open( char *name, int rw, int mode, int dbcachesize )
573 "==>(mdbm)ldbm_open(name=%s,rw=%x,mode=%x,cachesize=%d)\n",
574 name ? name : "NULL", rw, mode, dbcachesize );
578 LDBM_LOCK; /* We need locking here, this is the only non-thread
579 * safe function we have.
582 if ( (db = mdbm_open( name, rw, mode, MDBM_PG_SZ )) == NULL ) {
586 fprintf( stdout, "<==(mdbm)ldbm_open(db=NULL)\n" );
594 (void)mdbm_set_chain(db);
600 fprintf( stdout, "<==(mdbm)ldbm_open(db=%p)\n", db );
606 }/* LDBM ldbm_open() */
612 ldbm_close( LDBM ldbm )
615 /* Open and close are not reentrant so we need to use locks here */
619 "==>(mdbm)ldbm_close(db=%p)\n", ldbm );
628 fprintf( stdout, "<==(mdbm)ldbm_close()\n" );
632 }/* void ldbm_close() */
638 ldbm_sync( LDBM ldbm )
641 /* XXX: Not sure if this is re-entrant need to check code, if so
642 * you can leave LOCKS out.
649 }/* void ldbm_sync() */
652 #define MAX_MDBM_RETRY 5
655 ldbm_fetch( LDBM ldbm, Datum key )
661 /* This hack is needed because MDBM does not take keys
662 * which begin with NULL when working in the chaining
669 k.key.dsize = key.dsize + 1;
670 k.key.dptr = alloca(k.key.dsize);
672 memcpy( (void *)(k.key.dptr + 1), key.dptr, key.dsize );
682 d = mdbm_fetch( ldbm, k );
686 if ( k.val.dptr != NULL ) {
692 if ( (k.val.dptr = malloc( d.dsize )) != NULL ) {
694 k.val.dsize = d.dsize;
695 d = mdbm_fetch( ldbm, k );
704 }/* if ( d.dsize > 0 ) */
706 } while ((d.dsize > k.val.dsize) && (++retry < MAX_MDBM_RETRY));
712 }/* Datum ldbm_fetch() */
718 ldbm_store( LDBM ldbm, Datum key, Datum data, int flags )
721 Datum int_key; /* Internal key */
725 "==>(mdbm)ldbm_store(db=%p, key(dptr=%p,sz=%d), data(dptr=%p,sz=%d), flags=%x)\n",
726 ldbm, key.dptr, key.dsize, data.dptr, data.dsize, flags );
733 int_key.dsize = key.dsize + 1;
734 int_key.dptr = alloca( int_key.dsize );
735 *(int_key.dptr) = 'l'; /* Must not be NULL !*/
736 memcpy( (void *)(int_key.dptr + 1), key.dptr, key.dsize );
741 rc = mdbm_store( ldbm, int_key, data, flags );
742 if ( flags & LDBM_SYNC ) {
749 fprintf( stdout, "<==(mdbm)ldbm_store(rc=%d)\n", rc );
755 }/* int ldbm_store() */
761 ldbm_delete( LDBM ldbm, Datum key )
769 int_key.dsize = key.dsize + 1;
770 int_key.dptr = alloca(int_key.dsize);
771 *(int_key.dptr) = 'l';
772 memcpy( (void *)(int_key.dptr + 1), key.dptr, key.dsize );
777 rc = mdbm_delete( ldbm, int_key );
783 }/* int ldbm_delete() */
789 ldbm_get_next( LDBM ldbm, kvpair (*fptr)(MDBM *, kvpair) )
795 size_t sz = MDBM_PAGE_SIZE(ldbm);
804 in.key.dsize = sz; /* Assume first key in one pg */
805 in.key.dptr = alloca(sz);
807 in.val.dptr = NULL; /* Don't need data just key */
813 out = fptr( ldbm, in );
815 if (out.key.dsize > 0) {
817 ret.dsize = out.key.dsize - delta;
818 if ((ret.dptr = (char *)malloc(ret.dsize)) == NULL) {
825 memcpy(ret.dptr, (void *)(out.key.dptr + delta),
836 }/* static Datum ldbm_get_next() */
842 ldbm_firstkey( LDBM ldbm )
845 return ldbm_get_next( ldbm, mdbm_first );
847 }/* Datum ldbm_firstkey() */
853 ldbm_nextkey( LDBM ldbm, Datum key )
857 * don't know if this will affect the LDAP server opertaion
858 * but mdbm cannot take and input key.
861 return ldbm_get_next( ldbm, mdbm_next );
863 }/* Datum ldbm_nextkey() */
866 ldbm_errno( LDBM ldbm )
868 /* XXX: best we can do with current mdbm interface */
871 }/* int ldbm_errno() */
876 #elif defined( HAVE_NDBM )
878 /*****************************************************************
880 * if no gdbm or mdbm, fall back to using ndbm, the standard unix thing *
882 *****************************************************************/
886 ldbm_open( char *name, int rw, int mode, int dbcachesize )
891 ldbm = dbm_open( name, rw, mode );
898 ldbm_close( LDBM ldbm )
907 ldbm_sync( LDBM ldbm )
913 ldbm_fetch( LDBM ldbm, Datum key )
918 d = ldbm_datum_dup( ldbm, dbm_fetch( ldbm, key ) );
925 ldbm_store( LDBM ldbm, Datum key, Datum data, int flags )
930 rc = dbm_store( ldbm, key, data, flags );
937 ldbm_delete( LDBM ldbm, Datum key )
942 rc = dbm_delete( ldbm, key );
949 ldbm_firstkey( LDBM ldbm )
954 d = dbm_firstkey( ldbm );
961 ldbm_nextkey( LDBM ldbm, Datum key )
966 d = dbm_nextkey( ldbm );
973 ldbm_errno( LDBM ldbm )
978 err = dbm_error( ldbm );