The Open Group Base Specifications Issue 7
IEEE Std 1003.1-2008, 2016 Edition
Copyright © 2001-2016 The IEEE and The Open Group

#### NAME

> ndbm.h - definitions for ndbm database operations

#### SYNOPSIS

> `[XSI] #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 <stddef.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>

> XSH dbm_clearerr

#### CHANGE HISTORY

> First released in Issue 4, Version 2.

#### Issue 5

> References to the definitions of size_t and mode_t are added to the DESCRIPTION.

#### Issue 7

> This reference page is clarified with respect to macros and symbolic constants.

End of informative text.

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