ndbm.h(3)                  POSIX Programmer's Manual                 ndbm.h(3)



PPRROOLLOOGG
       This manual page is part of the POSIX Programmer's Manual.  The OS
       implementation of this interface may differ (consult the corresponding
       OS manual page for details of OS behavior), or the interface may not be
       implemented on OS.

NNAAMMEE
       ndbm.h -- definitions for ndbm database operations

SSYYNNOOPPSSIISS
       #include <ndbm.h>

DDEESSCCRRIIPPTTIIOONN
       The _<_n_d_b_m_._h_> header shall define the ddaattuumm 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 _d_p_t_r_.

       The _<_n_d_b_m_._h_> header shall define the ssiizzee__tt type as described in
       _<_s_t_d_d_e_f_._h_>.

       The _<_n_d_b_m_._h_> header shall define the DDBBMM type.

       The _<_n_d_b_m_._h_> header shall define the following symbolic constants as
       possible values for the _s_t_o_r_e___m_o_d_e argument to _d_b_m___s_t_o_r_e():

       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 _<_n_d_b_m_._h_> header shall define the mmooddee__tt type through ttyyppeeddeeff, as
       described in _<_s_y_s_/_t_y_p_e_s_._h_>.

       _T_h_e _f_o_l_l_o_w_i_n_g _s_e_c_t_i_o_n_s _a_r_e _i_n_f_o_r_m_a_t_i_v_e_.

AAPPPPLLIICCAATTIIOONN UUSSAAGGEE
       None.

RRAATTIIOONNAALLEE
       None.

FFUUTTUURREE DDIIRREECCTTIIOONNSS
       None.

SSEEEE AALLSSOO
       <<ssttddddeeff..hh>>, <<ssyyss__ttyyppeess..hh>>

       The System Interfaces volume of POSIX.1-2017, _d_b_m___c_l_e_a_r_e_r_r()

CCOOPPYYRRIIGGHHTT
       Portions of this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1-2017, Standard for Information Technology --
       Portable Operating System Interface (POSIX), The Open Group Base
       Specifications Issue 7, 2018 Edition, Copyright (C) 2018 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 .

       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
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .



IEEE/The Open Group                  2017                            ndbm.h(3)
