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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,  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 .