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ndbm.h - definitions for ndbm database operations
The <ndbm.h> header shall define the datum type as a structure that
includes at least the following members:
void *dptr A pointer to the application’s data.
size_t dsize The size of the object pointed to by dptr.
The size_t type shall be defined as described in <stddef.h> .
The <ndbm.h> header shall define the DBM type.
The following constants shall be defined as possible values for the
store_mode argument to dbm_store():
Insertion of new entries only.
Allow replacing existing entries.
The following shall be declared as functions and may also be defined as
macros. Function prototypes shall be provided.
int dbm_clearerr(DBM *);
void dbm_close(DBM *);
int dbm_delete(DBM *, datum);
int dbm_error(DBM *);
datum dbm_fetch(DBM *, datum);
datum dbm_firstkey(DBM *);
datum dbm_nextkey(DBM *);
DBM *dbm_open(const char *, int, mode_t);
int dbm_store(DBM *, datum, datum, int);
The mode_t type shall be defined through typedef as described in
The following sections are informative.
<stddef.h> , <sys/types.h> , the System Interfaces volume of
IEEE Std 1003.1-2001, dbm_clearerr()
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group. In the
event of any discrepancy between this version and the original IEEE and
The Open Group Standard, the original IEEE and The Open Group Standard
is the referee document. The original Standard can be obtained online
at http://www.opengroup.org/unix/online.html .