ndbm.h(0p) — Linux manual page


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

PROLOG         top

       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         top

       ndbm.h — definitions for ndbm database operations

SYNOPSIS         top

       #include <ndbm.h>

DESCRIPTION         top

       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

       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.



RATIONALE         top




SEE ALSO         top

       stddef.h(0p), sys_types.h(0p)

       The System Interfaces volume of POSIX.1‐2017, dbm_clearerr(3p)

COPYRIGHT         top

       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(0P)

Pages that refer to this page: dbm_clearerr(3p)