NAME¶

tdb_open - Open a tdb database.

SYNOPSIS¶

#include <tdb.h>

TDB_CONTEXT *tdb_open(const char *pathname, int hash_size,
        int tdb_flags, int open_flags, mode_t mode );

DESCRIPTION¶

Open the database, creating it if necessary. The hash size is advisory, use zero for a default value. tdb_flags can be one of

TDB_CLEAR_IF_FIRST

Clear database if we are the only one with it open.

TDB_INTERNAL

Don't use a file, instead store the data in memory. The pathname , open_flags , and mode are ignored in this case. This is useful if you need a quick associative array or map.

TDB_NOLOCK

Don't do any locking (this is always turned on for read-only file descriptors)

TDB_NOMMAP

Don't use mmap.

TDB_CONVERT

Create a database in the reverse of native endian: normally when the database is created (or cleared with TDB_CLEAR_IF_FIRST), it is created in native endian order. This flag is set (or unset) automatically for existing databases.

The open_flags and mode are passed straight to the open call on the database file. A flags value of O_WRONLY is invalid.

RETURN VALUE¶

On success a pointer to an opaque data structure, a TDB_CONTEXT is returned. On error a NULL is returned.

AUTHORS¶

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

SEE ALSO¶

open(2), gdbm(3), tdb(3)