tdb(3) [debian man page]

TDB(3)							     Linux Programmer's Manual							    TDB(3)

NAME

       tdb - trivial database

SYNOPSIS

       A database similar to gdbm which allows multiple simultaneous writers.

DESCRIPTION

       This is a simple database API. It was inspired by the realisation that in Samba we have several ad-hoc bits of code that essentially imple-
       ment small databases for sharing structures between parts of Samba. As I was about to add another I realised that a generic database module
       was called for to replace all the ad-hoc bits.

       I based the interface on gdbm. I couldn't use gdbm as we need to be able to have multiple writers to the databases at one time.

AUTHORS

       Software: Andrew Tridgell <tridge@linuxcare.com> and Luke Kenneth Casson Leighton Man page: Ben Woodard <ben@valinux.com>

SEE ALSO

       gdbm(3),  tdb_open(3),  tdb_close(3),  tdb_delete(3),  tdb_error(3),  tdb_exists(3),  tdb_fetch(3), tdb_firstkey(3), tdb_store(3), tdb_tra-
       verse(3), tdb_lockall(3), tdb_lockkeys(3), tdb_chainlock(3)

Samba								   Aug 16, 2000 							    TDB(3)

TDB_TRAVERSE(3) 					     Linux Programmer's Manual						   TDB_TRAVERSE(3)

NAME

       tdb_traverse - visit every element in a tdb database

SYNOPSIS

       #include <tdb.h>

       int tdb_traverse(TDB_CONTEXT *tdb,
	       int (*fn)(TDB_CONTEXT *,TDB_DATA,TDB_DATA,void *),
	       void *state);

DESCRIPTION

       tdb_traverse  is  the only sure way to visit all the items within a given database, tdb Because this function has intimate knowledge of the
       internals of the database, it is able to cope with writers touching the database at the same time it is trying to traverse it.

       If fn is supplied it will be called with the state parameter for each element in the database, as the forth argument. The First argument is
       the  database  tdb  the second is the key and the third is the data. If this function call returns anything but 0, the traversal will stop.
       Unlike in tdb_fetch() the programmer is not required to free either the pointer from either the key or data parameters that are passed into
       the function. The fn function should have the prototype:
	  int (*tdb_traverse_func)(TDB_CONTEXT *, TDB_DATA, TDB_DATA, void *);

       Calling tdb_traverse with a NULL fn parameter is the appropriate way to count the number of elements in the database.

RETURN VALUE

       The return value is the number of elements traversed or -1 if there was an error.

AUTHORS

       Software: Andrew Tridgell <tridge@linuxcare.com> and Luke Kenneth Casson Leighton Man page: Ben Woodard <ben@valinux.com>

SEE ALSO

       gdbm(3), tdb(3)

Samba								   Aug 16, 2000 						   TDB_TRAVERSE(3)