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 );
88 extern int syslog(int, char*, ...);
93 ldbm_malloc( size_t size )
95 return( calloc( 1, size ));
99 ldbm_db_errcall( const char *prefix, char *message )
102 syslog( LOG_INFO, "ldbm_db_errcall(): %s %s", prefix, message );
106 /* a dbEnv for BERKELEYv2 */
107 static DB_ENV ldbm_Env_internal;
108 DB_ENV *ldbm_Env = NULL;
110 /* Berkeley DB 2.x is reentrant */
111 #define LDBM_LOCK ((void)0)
112 #define LDBM_UNLOCK ((void)0)
114 int ldbm_initialize( void )
119 if(ldbm_initialized++) return 1;
121 memset( &ldbm_Env_internal, 0, sizeof( DB_ENV ));
122 ldbm_Env = &ldbm_Env_internal;
124 ldbm_Env->db_errcall = ldbm_db_errcall;
125 ldbm_Env->db_errpfx = "==>";
127 envFlags = DB_CREATE | DB_THREAD;
129 if ( ( err = db_appinit( NULL, NULL, ldbm_Env, envFlags )) ) {
133 sprintf( error, "%ld\n", (long) err );
135 sprintf( error, "%s\n", strerror( err ));
140 "ldbm_initialize(): FATAL error in db_appinit() : %s\n",
149 int ldbm_shutdown( void )
151 if( !ldbm_initialized ) return 1;
153 db_appexit( ldbm_Env );
160 #if defined( LDBM_USE_DBHASH ) || defined( LDBM_USE_DBBTREE )
162 /*****************************************************************
164 * use berkeley db hash or btree package *
166 *****************************************************************/
169 ldbm_open( char *name, int rw, int mode, int dbcachesize )
173 #ifdef HAVE_BERKELEY_DB2
176 memset( &dbinfo, 0, sizeof( dbinfo ));
177 if (( ldbm_Env == NULL ) || ( ldbm_Env->mp_info == NULL ))
178 dbinfo.db_cachesize = dbcachesize;
179 dbinfo.db_pagesize = DEFAULT_DB_PAGE_SIZE;
180 dbinfo.db_malloc = ldbm_malloc;
183 (void) db_open( name, DB_TYPE, rw, mode, ldbm_Env, &dbinfo, &ret );
191 if ( DB_TYPE == DB_HASH ) {
192 memset( (char *) &hinfo, '\0', sizeof(hinfo) );
193 hinfo.cachesize = dbcachesize;
195 } else if ( DB_TYPE == DB_BTREE ) {
196 memset( (char *) &binfo, '\0', sizeof(binfo) );
197 binfo.cachesize = dbcachesize;
204 ret = dbopen( name, rw, mode, DB_TYPE, info );
213 ldbm_close( LDBM ldbm )
216 #ifdef HAVE_BERKELEY_DB2
217 (*ldbm->close)( ldbm, 0 );
219 (*ldbm->close)( ldbm );
225 ldbm_sync( LDBM ldbm )
228 (*ldbm->sync)( ldbm, 0 );
233 ldbm_fetch( LDBM ldbm, Datum key )
240 #ifdef HAVE_BERKELEY_DB2
241 ldbm_datum_init( data );
243 data.flags = DB_DBT_MALLOC;
245 if ( (rc = (*ldbm->get)( ldbm, NULL, &key, &data, 0 )) != 0 ) {
246 ldbm_datum_free( ldbm, data );
248 if ( (rc = (*ldbm->get)( ldbm, &key, &data, 0 )) == 0 ) {
249 /* Berkeley DB 1.85 don't malloc the data for us */
250 /* duplicate it for to ensure reentrancy */
251 data = ldbm_datum_dup( ldbm, data );
264 ldbm_store( LDBM ldbm, Datum key, Datum data, int flags )
270 #ifdef HAVE_BERKELEY_DB2
271 rc = (*ldbm->put)( ldbm, NULL, &key, &data, flags & ~LDBM_SYNC );
274 rc = (*ldbm->put)( ldbm, &key, &data, flags & ~LDBM_SYNC );
277 if ( flags & LDBM_SYNC )
278 (*ldbm->sync)( ldbm, 0 );
286 ldbm_delete( LDBM ldbm, Datum key )
292 #ifdef HAVE_BERKELEY_DB2
293 rc = (*ldbm->del)( ldbm, NULL, &key, 0 );
296 rc = (*ldbm->del)( ldbm, &key, 0 );
298 (*ldbm->sync)( ldbm, 0 );
306 #ifdef HAVE_BERKELEY_DB2
307 ldbm_firstkey( LDBM ldbm, DBC **dbch )
309 ldbm_firstkey( LDBM ldbm )
314 #ifdef HAVE_BERKELEY_DB2
317 ldbm_datum_init( key );
318 ldbm_datum_init( data );
320 key.flags = data.flags = DB_DBT_MALLOC;
324 /* acquire a cursor for the DB */
326 # if defined( DB_VERSION_MAJOR ) && defined( DB_VERSION_MINOR ) && \
327 DB_VERSION_MAJOR == 2 && DB_VERSION_MINOR < 6
329 if ( (*ldbm->cursor)( ldbm, NULL, &dbci ))
332 if ( (*ldbm->cursor)( ldbm, NULL, &dbci, 0 ))
339 if ( (*dbci->c_get)( dbci, &key, &data, DB_NEXT ) == 0 ) {
340 ldbm_datum_free( ldbm, data );
348 if ( (rc = (*ldbm->seq)( ldbm, &key, &data, R_FIRST )) == 0 ) {
349 key = ldbm_datum_dup( ldbm, key );
357 #ifdef HAVE_BERKELEY_DB2
367 #ifdef HAVE_BERKELEY_DB2
368 ldbm_nextkey( LDBM ldbm, Datum key, DBC *dbcp )
370 ldbm_nextkey( LDBM ldbm, Datum key )
375 #ifdef HAVE_BERKELEY_DB2
376 ldbm_datum_init( data );
378 ldbm_datum_free( ldbm, key );
379 key.flags = data.flags = DB_DBT_MALLOC;
383 if ( (*dbcp->c_get)( dbcp, &key, &data, DB_NEXT ) == 0 ) {
384 ldbm_datum_free( ldbm, data );
392 if ( (rc = (*ldbm->seq)( ldbm, &key, &data, R_NEXT )) == 0 ) {
393 key = ldbm_datum_dup( ldbm, key );
407 ldbm_errno( LDBM ldbm )
412 #elif defined( HAVE_GDBM )
414 #include <sys/stat.h>
416 /*****************************************************************
420 *****************************************************************/
423 ldbm_open( char *name, int rw, int mode, int dbcachesize )
430 if ( (db = gdbm_open( name, 0, rw | GDBM_FAST, mode, 0 )) == NULL ) {
434 if ( dbcachesize > 0 && stat( name, &st ) == 0 ) {
435 dbcachesize = (dbcachesize / st.st_blksize);
436 gdbm_setopt( db, GDBM_CACHESIZE, &dbcachesize, sizeof(int) );
445 ldbm_close( LDBM ldbm )
453 ldbm_sync( LDBM ldbm )
461 ldbm_fetch( LDBM ldbm, Datum key )
466 d = gdbm_fetch( ldbm, key );
473 ldbm_store( LDBM ldbm, Datum key, Datum data, int flags )
478 rc = gdbm_store( ldbm, key, data, flags & ~LDBM_SYNC );
479 if ( flags & LDBM_SYNC )
487 ldbm_delete( LDBM ldbm, Datum key )
492 rc = gdbm_delete( ldbm, key );
500 ldbm_firstkey( LDBM ldbm )
505 d = gdbm_firstkey( ldbm );
512 ldbm_nextkey( LDBM ldbm, Datum key )
517 d = gdbm_nextkey( ldbm, key );
524 ldbm_errno( LDBM ldbm )
537 /* MMAPED DBM HASHING DATABASE */
542 /* #define MDBM_DEBUG */
549 /* #define MDBM_CHAIN */
556 #define mdbm_store mdbm_chain_store
557 #define mdbm_fetch mdbm_chain_fetch
558 #define mdbm_delete mdbm_chain_delete
559 #define mdbm_first mdbm_chain_first
560 #define mdbm_next mdbm_chain_next
564 #define MDBM_PG_SZ (4*1024)
566 /*****************************************************************
570 *****************************************************************/
573 ldbm_open( char *name, int rw, int mode, int dbcachesize )
579 "==>(mdbm)ldbm_open(name=%s,rw=%x,mode=%x,cachesize=%d)\n",
580 name ? name : "NULL", rw, mode, dbcachesize );
584 LDBM_LOCK; /* We need locking here, this is the only non-thread
585 * safe function we have.
588 if ( (db = mdbm_open( name, rw, mode, MDBM_PG_SZ )) == NULL ) {
592 fprintf( stdout, "<==(mdbm)ldbm_open(db=NULL)\n" );
600 (void)mdbm_set_chain(db);
606 fprintf( stdout, "<==(mdbm)ldbm_open(db=%p)\n", db );
612 }/* LDBM ldbm_open() */
618 ldbm_close( LDBM ldbm )
621 /* Open and close are not reentrant so we need to use locks here */
625 "==>(mdbm)ldbm_close(db=%p)\n", ldbm );
634 fprintf( stdout, "<==(mdbm)ldbm_close()\n" );
638 }/* void ldbm_close() */
644 ldbm_sync( LDBM ldbm )
647 /* XXX: Not sure if this is re-entrant need to check code, if so
648 * you can leave LOCKS out.
655 }/* void ldbm_sync() */
658 #define MAX_MDBM_RETRY 5
661 ldbm_fetch( LDBM ldbm, Datum key )
667 /* This hack is needed because MDBM does not take keys
668 * which begin with NULL when working in the chaining
675 k.key.dsize = key.dsize + 1;
676 k.key.dptr = alloca(k.key.dsize);
678 memcpy( (void *)(k.key.dptr + 1), key.dptr, key.dsize );
688 d = mdbm_fetch( ldbm, k );
692 if ( k.val.dptr != NULL ) {
698 if ( (k.val.dptr = malloc( d.dsize )) != NULL ) {
700 k.val.dsize = d.dsize;
701 d = mdbm_fetch( ldbm, k );
710 }/* if ( d.dsize > 0 ) */
712 } while ((d.dsize > k.val.dsize) && (++retry < MAX_MDBM_RETRY));
718 }/* Datum ldbm_fetch() */
724 ldbm_store( LDBM ldbm, Datum key, Datum data, int flags )
727 Datum int_key; /* Internal key */
731 "==>(mdbm)ldbm_store(db=%p, key(dptr=%p,sz=%d), data(dptr=%p,sz=%d), flags=%x)\n",
732 ldbm, key.dptr, key.dsize, data.dptr, data.dsize, flags );
739 int_key.dsize = key.dsize + 1;
740 int_key.dptr = alloca( int_key.dsize );
741 *(int_key.dptr) = 'l'; /* Must not be NULL !*/
742 memcpy( (void *)(int_key.dptr + 1), key.dptr, key.dsize );
747 rc = mdbm_store( ldbm, int_key, data, flags );
748 if ( flags & LDBM_SYNC ) {
755 fprintf( stdout, "<==(mdbm)ldbm_store(rc=%d)\n", rc );
761 }/* int ldbm_store() */
767 ldbm_delete( LDBM ldbm, Datum key )
775 int_key.dsize = key.dsize + 1;
776 int_key.dptr = alloca(int_key.dsize);
777 *(int_key.dptr) = 'l';
778 memcpy( (void *)(int_key.dptr + 1), key.dptr, key.dsize );
783 rc = mdbm_delete( ldbm, int_key );
789 }/* int ldbm_delete() */
795 ldbm_get_next( LDBM ldbm, kvpair (*fptr)(MDBM *, kvpair) )
801 size_t sz = MDBM_PAGE_SIZE(ldbm);
810 in.key.dsize = sz; /* Assume first key in one pg */
811 in.key.dptr = alloca(sz);
813 in.val.dptr = NULL; /* Don't need data just key */
819 out = fptr( ldbm, in );
821 if (out.key.dsize > 0) {
823 ret.dsize = out.key.dsize - delta;
824 if ((ret.dptr = (char *)malloc(ret.dsize)) == NULL) {
831 memcpy(ret.dptr, (void *)(out.key.dptr + delta),
842 }/* static Datum ldbm_get_next() */
848 ldbm_firstkey( LDBM ldbm )
851 return ldbm_get_next( ldbm, mdbm_first );
853 }/* Datum ldbm_firstkey() */
859 ldbm_nextkey( LDBM ldbm, Datum key )
863 * don't know if this will affect the LDAP server opertaion
864 * but mdbm cannot take and input key.
867 return ldbm_get_next( ldbm, mdbm_next );
869 }/* Datum ldbm_nextkey() */
872 ldbm_errno( LDBM ldbm )
874 /* XXX: best we can do with current mdbm interface */
877 }/* int ldbm_errno() */
882 #elif defined( HAVE_NDBM )
884 /*****************************************************************
886 * if no gdbm or mdbm, fall back to using ndbm, the standard unix thing *
888 *****************************************************************/
892 ldbm_open( char *name, int rw, int mode, int dbcachesize )
897 ldbm = dbm_open( name, rw, mode );
904 ldbm_close( LDBM ldbm )
913 ldbm_sync( LDBM ldbm )
919 ldbm_fetch( LDBM ldbm, Datum key )
924 d = ldbm_datum_dup( ldbm, dbm_fetch( ldbm, key ) );
931 ldbm_store( LDBM ldbm, Datum key, Datum data, int flags )
936 rc = dbm_store( ldbm, key, data, flags );
943 ldbm_delete( LDBM ldbm, Datum key )
948 rc = dbm_delete( ldbm, key );
955 ldbm_firstkey( LDBM ldbm )
960 d = dbm_firstkey( ldbm );
967 ldbm_nextkey( LDBM ldbm, Datum key )
972 d = dbm_nextkey( ldbm );
979 ldbm_errno( LDBM ldbm )
984 err = dbm_error( ldbm );