DBOPEN (3)
database access methods
SYNOPSIS
B
#include <sys/types.h>
#include <limits.h>
#include <db.h>
DB *
dbopen(const char *file, int flags, int mode, DBTYPE type,
const void *openinfo);
R
DESCRIPTION
Dbopen
is the library interface to database files.
The supported file formats are btree, hashed and UNIX file oriented.
The btree format is a representation of a sorted, balanced tree structure.
The hashed format is an extensible, dynamic hashing scheme.
The flat-file format is a byte stream file with fixed or variable length
records.
The formats and file format specific information are described in detail
in their respective manual pages
btree (3),
hash (3)
and
recno (3).
Dbopen opens
file
for reading and/or writing.
Files never intended to be preserved on disk may be created by setting
the file parameter to NULL.
The
flags
and
mode arguments
are as specified to the
open (2)
routine, however, only the O_CREAT, O_EXCL, O_EXLOCK, O_NONBLOCK,
O_RDONLY, O_RDWR, O_SHLOCK and O_TRUNC flags are meaningful.
(Note, opening a database file O_WRONLY is not possible.)
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