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 .