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

PROLOG
       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.

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,	 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 <std‐
       def.h>.

       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.

APPLICATION USAGE
       None.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       <stddef.h>, <sys_types.h>

       The System Interfaces volume of POSIX.1‐2008, dbm_clearerr()

COPYRIGHT
       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 Electri‐
       cal  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  https://www.ker‐
       nel.org/doc/man-pages/reporting_bugs.html .

IEEE/The Open Group		     2013			    ndbm.h(0P)
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