<ndbm.h>(0P)                                        POSIX Programmer's Manual                                       <ndbm.h>(0P)



NAME
       ndbm.h - definitions for ndbm database operations

SYNOPSIS
       #include <ndbm.h>

DESCRIPTION
       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():

       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 mode_t type shall be defined through typedef as described in <sys/types.h> .

       The following sections are informative.

APPLICATION USAGE
       None.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       <stddef.h>, <sys/types.h>, the System Interfaces volume of IEEE Std 1003.1-2001, dbm_clearerr()

COPYRIGHT
       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,  Copy-
       right (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.open-
       group.org/unix/online.html .



IEEE/The Open Group                                           2003                                                  <ndbm.h>(0P)