This manual page is part of the POSIX Programmer's Manual. The Linux
implementation of this interface may differ (consult the corresponding Linux
manual page for details of Linux behavior), or the interface may not be
implemented on Linux.
ndbm.h — definitions for ndbm database operations
header shall define the datum
type as a
structure, which shall include 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.
header shall define the size_t
described in <stddef.h>
header shall define the DBM
header shall define the following symbolic constants
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);
header shall define the mode_t
, as described in <sys/types.h>
The following sections are informative.
The System Interfaces volume of POSIX.1‐2008,
Portions of this text are reprinted and reproduced in electronic form from IEEE
Std 1003.1, 2013 Edition, Standard for Information Technology -- Portable
Operating System Interface (POSIX), The Open Group Base Specifications Issue
7, Copyright (C) 2013 by the Institute of Electrical and Electronics
Engineers, Inc and The Open Group. (This is POSIX.1-2008 with the 2013
Technical Corrigendum 1 applied.) 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.unix.org/online.html .
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