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 ));
35 ldbm_datum_dup( LDBM ldbm, Datum data )
39 ldbm_datum_init( dup );
41 if ( data.dsize == 0 ) {
47 dup.dsize = data.dsize;
48 if ( (dup.dptr = (char *) malloc( data.dsize )) != NULL )
49 memcpy( dup.dptr, data.dptr, data.dsize );
54 static int ldbm_initialized = 0;
56 #ifndef HAVE_BERKELEY_DB2
57 /* Everything but DB2 is non-reentrant */
59 static ldap_pvt_thread_mutex_t ldbm_big_mutex;
60 #define LDBM_LOCK (ldap_pvt_thread_mutex_lock(&ldbm_big_mutex))
61 #define LDBM_UNLOCK (ldap_pvt_thread_mutex_unlock(&ldbm_big_mutex))
63 int ldbm_initialize( void )
65 if(ldbm_initialized++) return 1;
67 ldap_pvt_thread_mutex_init( &ldbm_big_mutex );
72 int ldbm_shutdown( void )
74 if( !ldbm_initialized ) return 1;
76 ldap_pvt_thread_mutex_destroy( &ldbm_big_mutex );
84 ldbm_malloc( size_t size )
86 return( calloc( 1, size ));
90 #include <ac/syslog.h>
94 ldbm_db_errcall( const char *prefix, char *message )
97 syslog( LOG_INFO, "ldbm_db_errcall(): %s %s", prefix, message );
101 /* a dbEnv for BERKELEYv2 */
102 static DB_ENV ldbm_Env_internal;
103 DB_ENV *ldbm_Env = NULL;
105 /* Berkeley DB 2.x is reentrant */
106 #define LDBM_LOCK ((void)0)
107 #define LDBM_UNLOCK ((void)0)
109 int ldbm_initialize( void )
114 if(ldbm_initialized++) return 1;
116 memset( &ldbm_Env_internal, 0, sizeof( DB_ENV ));
117 ldbm_Env = &ldbm_Env_internal;
119 ldbm_Env->db_errcall = ldbm_db_errcall;
120 ldbm_Env->db_errpfx = "==>";
122 envFlags = DB_CREATE | DB_THREAD;
124 if ( ( err = db_appinit( NULL, NULL, ldbm_Env, envFlags )) ) {
128 sprintf( error, "%ld\n", (long) err );
130 sprintf( error, "%s\n", strerror( err ));
135 "ldbm_initialize(): FATAL error in db_appinit() : %s\n",
144 int ldbm_shutdown( void )
146 if( !ldbm_initialized ) return 1;
148 db_appexit( ldbm_Env );
155 #if defined( LDBM_USE_DBHASH ) || defined( LDBM_USE_DBBTREE )
157 /*****************************************************************
159 * use berkeley db hash or btree package *
161 *****************************************************************/
164 ldbm_open( char *name, int rw, int mode, int dbcachesize )
168 #ifdef HAVE_BERKELEY_DB2
171 memset( &dbinfo, 0, sizeof( dbinfo ));
172 if (( ldbm_Env == NULL ) || ( ldbm_Env->mp_info == NULL ))
173 dbinfo.db_cachesize = dbcachesize;
174 dbinfo.db_pagesize = DEFAULT_DB_PAGE_SIZE;
175 dbinfo.db_malloc = ldbm_malloc;
178 (void) db_open( name, DB_TYPE, rw, mode, ldbm_Env, &dbinfo, &ret );
186 if ( DB_TYPE == DB_HASH ) {
187 memset( (char *) &hinfo, '\0', sizeof(hinfo) );
188 hinfo.cachesize = dbcachesize;
190 } else if ( DB_TYPE == DB_BTREE ) {
191 memset( (char *) &binfo, '\0', sizeof(binfo) );
192 binfo.cachesize = dbcachesize;
199 ret = dbopen( name, rw, mode, DB_TYPE, info );
208 ldbm_close( LDBM ldbm )
211 #ifdef HAVE_BERKELEY_DB2
212 (*ldbm->close)( ldbm, 0 );
214 (*ldbm->close)( ldbm );
220 ldbm_sync( LDBM ldbm )
223 (*ldbm->sync)( ldbm, 0 );
228 ldbm_fetch( LDBM ldbm, Datum key )
235 #ifdef HAVE_BERKELEY_DB2
236 ldbm_datum_init( data );
238 data.flags = DB_DBT_MALLOC;
240 if ( (rc = (*ldbm->get)( ldbm, NULL, &key, &data, 0 )) != 0 ) {
241 ldbm_datum_free( ldbm, data );
243 if ( (rc = (*ldbm->get)( ldbm, &key, &data, 0 )) == 0 ) {
244 /* Berkeley DB 1.85 don't malloc the data for us */
245 /* duplicate it for to ensure reentrancy */
246 data = ldbm_datum_dup( ldbm, data );
259 ldbm_store( LDBM ldbm, Datum key, Datum data, int flags )
265 #ifdef HAVE_BERKELEY_DB2
266 rc = (*ldbm->put)( ldbm, NULL, &key, &data, flags & ~LDBM_SYNC );
269 rc = (*ldbm->put)( ldbm, &key, &data, flags & ~LDBM_SYNC );
272 if ( flags & LDBM_SYNC )
273 (*ldbm->sync)( ldbm, 0 );
281 ldbm_delete( LDBM ldbm, Datum key )
287 #ifdef HAVE_BERKELEY_DB2
288 rc = (*ldbm->del)( ldbm, NULL, &key, 0 );
291 rc = (*ldbm->del)( ldbm, &key, 0 );
293 (*ldbm->sync)( ldbm, 0 );
301 #ifdef HAVE_BERKELEY_DB2
302 ldbm_firstkey( LDBM ldbm, DBC **dbch )
304 ldbm_firstkey( LDBM ldbm )
309 #ifdef HAVE_BERKELEY_DB2
312 ldbm_datum_init( key );
313 ldbm_datum_init( data );
315 key.flags = data.flags = DB_DBT_MALLOC;
319 /* acquire a cursor for the DB */
321 # if defined( DB_VERSION_MAJOR ) && defined( DB_VERSION_MINOR ) && \
322 DB_VERSION_MAJOR == 2 && DB_VERSION_MINOR < 6
324 if ( (*ldbm->cursor)( ldbm, NULL, &dbci ))
327 if ( (*ldbm->cursor)( ldbm, NULL, &dbci, 0 ))
334 if ( (*dbci->c_get)( dbci, &key, &data, DB_NEXT ) == 0 ) {
335 ldbm_datum_free( ldbm, data );
343 if ( (rc = (*ldbm->seq)( ldbm, &key, &data, R_FIRST )) == 0 ) {
344 key = ldbm_datum_dup( ldbm, key );
352 #ifdef HAVE_BERKELEY_DB2
362 #ifdef HAVE_BERKELEY_DB2
363 ldbm_nextkey( LDBM ldbm, Datum key, DBC *dbcp )
365 ldbm_nextkey( LDBM ldbm, Datum key )
370 #ifdef HAVE_BERKELEY_DB2
371 ldbm_datum_init( data );
373 ldbm_datum_free( ldbm, key );
374 key.flags = data.flags = DB_DBT_MALLOC;
378 if ( (*dbcp->c_get)( dbcp, &key, &data, DB_NEXT ) == 0 ) {
379 ldbm_datum_free( ldbm, data );
387 if ( (rc = (*ldbm->seq)( ldbm, &key, &data, R_NEXT )) == 0 ) {
388 key = ldbm_datum_dup( ldbm, key );
402 ldbm_errno( LDBM ldbm )
407 #elif defined( HAVE_GDBM )
409 #ifdef HAVE_ST_BLKSIZE
410 #include <sys/stat.h>
413 /*****************************************************************
417 *****************************************************************/
420 ldbm_open( char *name, int rw, int mode, int dbcachesize )
423 #ifdef HAVE_ST_BLKSIZE
429 if ( (db = gdbm_open( name, 0, rw | GDBM_FAST, mode, 0 )) == NULL ) {
434 #ifdef HAVE_ST_BLKSIZE
435 if ( dbcachesize > 0 && stat( name, &st ) == 0 ) {
436 dbcachesize = (dbcachesize / st.st_blksize);
437 gdbm_setopt( db, GDBM_CACHESIZE, &dbcachesize, sizeof(int) );
440 dbcachesize = (dbcachesize / 4096);
441 gdbm_setopt( db, GDBM_CACHESIZE, &dbcachesize, sizeof(int) );
450 ldbm_close( LDBM ldbm )
458 ldbm_sync( LDBM ldbm )
466 ldbm_fetch( LDBM ldbm, Datum key )
471 d = gdbm_fetch( ldbm, key );
478 ldbm_store( LDBM ldbm, Datum key, Datum data, int flags )
483 rc = gdbm_store( ldbm, key, data, flags & ~LDBM_SYNC );
484 if ( flags & LDBM_SYNC )
492 ldbm_delete( LDBM ldbm, Datum key )
497 rc = gdbm_delete( ldbm, key );
505 ldbm_firstkey( LDBM ldbm )
510 d = gdbm_firstkey( ldbm );
517 ldbm_nextkey( LDBM ldbm, Datum key )
522 d = gdbm_nextkey( ldbm, key );
529 ldbm_errno( LDBM ldbm )
542 /* MMAPED DBM HASHING DATABASE */
547 /* #define MDBM_DEBUG */
554 /* #define MDBM_CHAIN */
561 #define mdbm_store mdbm_chain_store
562 #define mdbm_fetch mdbm_chain_fetch
563 #define mdbm_delete mdbm_chain_delete
564 #define mdbm_first mdbm_chain_first
565 #define mdbm_next mdbm_chain_next
569 #define MDBM_PG_SZ (4*1024)
571 /*****************************************************************
575 *****************************************************************/
578 ldbm_open( char *name, int rw, int mode, int dbcachesize )
584 "==>(mdbm)ldbm_open(name=%s,rw=%x,mode=%x,cachesize=%d)\n",
585 name ? name : "NULL", rw, mode, dbcachesize );
589 LDBM_LOCK; /* We need locking here, this is the only non-thread
590 * safe function we have.
593 if ( (db = mdbm_open( name, rw, mode, MDBM_PG_SZ )) == NULL ) {
597 fprintf( stdout, "<==(mdbm)ldbm_open(db=NULL)\n" );
605 (void)mdbm_set_chain(db);
611 fprintf( stdout, "<==(mdbm)ldbm_open(db=%p)\n", db );
617 }/* LDBM ldbm_open() */
623 ldbm_close( LDBM ldbm )
626 /* Open and close are not reentrant so we need to use locks here */
630 "==>(mdbm)ldbm_close(db=%p)\n", ldbm );
639 fprintf( stdout, "<==(mdbm)ldbm_close()\n" );
643 }/* void ldbm_close() */
649 ldbm_sync( LDBM ldbm )
652 /* XXX: Not sure if this is re-entrant need to check code, if so
653 * you can leave LOCKS out.
660 }/* void ldbm_sync() */
663 #define MAX_MDBM_RETRY 5
666 ldbm_fetch( LDBM ldbm, Datum key )
672 /* This hack is needed because MDBM does not take keys
673 * which begin with NULL when working in the chaining
680 k.key.dsize = key.dsize + 1;
681 k.key.dptr = alloca(k.key.dsize);
683 memcpy( (void *)(k.key.dptr + 1), key.dptr, key.dsize );
693 d = mdbm_fetch( ldbm, k );
697 if ( k.val.dptr != NULL ) {
703 if ( (k.val.dptr = malloc( d.dsize )) != NULL ) {
705 k.val.dsize = d.dsize;
706 d = mdbm_fetch( ldbm, k );
715 }/* if ( d.dsize > 0 ) */
717 } while ((d.dsize > k.val.dsize) && (++retry < MAX_MDBM_RETRY));
723 }/* Datum ldbm_fetch() */
729 ldbm_store( LDBM ldbm, Datum key, Datum data, int flags )
732 Datum int_key; /* Internal key */
736 "==>(mdbm)ldbm_store(db=%p, key(dptr=%p,sz=%d), data(dptr=%p,sz=%d), flags=%x)\n",
737 ldbm, key.dptr, key.dsize, data.dptr, data.dsize, flags );
744 int_key.dsize = key.dsize + 1;
745 int_key.dptr = alloca( int_key.dsize );
746 *(int_key.dptr) = 'l'; /* Must not be NULL !*/
747 memcpy( (void *)(int_key.dptr + 1), key.dptr, key.dsize );
752 rc = mdbm_store( ldbm, int_key, data, flags );
753 if ( flags & LDBM_SYNC ) {
760 fprintf( stdout, "<==(mdbm)ldbm_store(rc=%d)\n", rc );
766 }/* int ldbm_store() */
772 ldbm_delete( LDBM ldbm, Datum key )
780 int_key.dsize = key.dsize + 1;
781 int_key.dptr = alloca(int_key.dsize);
782 *(int_key.dptr) = 'l';
783 memcpy( (void *)(int_key.dptr + 1), key.dptr, key.dsize );
788 rc = mdbm_delete( ldbm, int_key );
794 }/* int ldbm_delete() */
800 ldbm_get_next( LDBM ldbm, kvpair (*fptr)(MDBM *, kvpair) )
806 size_t sz = MDBM_PAGE_SIZE(ldbm);
815 in.key.dsize = sz; /* Assume first key in one pg */
816 in.key.dptr = alloca(sz);
818 in.val.dptr = NULL; /* Don't need data just key */
824 out = fptr( ldbm, in );
826 if (out.key.dsize > 0) {
828 ret.dsize = out.key.dsize - delta;
829 if ((ret.dptr = (char *)malloc(ret.dsize)) == NULL) {
836 memcpy(ret.dptr, (void *)(out.key.dptr + delta),
847 }/* static Datum ldbm_get_next() */
853 ldbm_firstkey( LDBM ldbm )
856 return ldbm_get_next( ldbm, mdbm_first );
858 }/* Datum ldbm_firstkey() */
864 ldbm_nextkey( LDBM ldbm, Datum key )
868 * don't know if this will affect the LDAP server opertaion
869 * but mdbm cannot take and input key.
872 return ldbm_get_next( ldbm, mdbm_next );
874 }/* Datum ldbm_nextkey() */
877 ldbm_errno( LDBM ldbm )
879 /* XXX: best we can do with current mdbm interface */
882 }/* int ldbm_errno() */
887 #elif defined( HAVE_NDBM )
889 /*****************************************************************
891 * if no gdbm or mdbm, fall back to using ndbm, the standard unix thing *
893 *****************************************************************/
897 ldbm_open( char *name, int rw, int mode, int dbcachesize )
902 ldbm = dbm_open( name, rw, mode );
909 ldbm_close( LDBM ldbm )
918 ldbm_sync( LDBM ldbm )
924 ldbm_fetch( LDBM ldbm, Datum key )
929 d = ldbm_datum_dup( ldbm, dbm_fetch( ldbm, key ) );
936 ldbm_store( LDBM ldbm, Datum key, Datum data, int flags )
941 rc = dbm_store( ldbm, key, data, flags );
948 ldbm_delete( LDBM ldbm, Datum key )
953 rc = dbm_delete( ldbm, key );
960 ldbm_firstkey( LDBM ldbm )
965 d = dbm_firstkey( ldbm );
972 ldbm_nextkey( LDBM ldbm, Datum key )
977 d = dbm_nextkey( ldbm );
984 ldbm_errno( LDBM ldbm )
989 err = dbm_error( ldbm );