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.
The <ndbm.h> 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.
The <ndbm.h> header shall define the size_t type as described in
The <ndbm.h> header shall define the DBM type.
The <ndbm.h> header shall define the following symbolic constants as
possible values for the store_mode argument to dbm_store():
DBM_INSERT Insertion of new entries only.
DBM_REPLACE 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 <ndbm.h> header shall define the mode_t type through typedef, as
described in <sys/types.h>.
The following sections are informative.
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 .
Any typographical or formatting errors that appear in this page are
most likely to have been introduced during the conversion of the
source files to man page format. To report such errors, see
IEEE/The Open Group 2013 ndbm.h(0P)