Returns the first key in a database.
C Library (libc.a)
#include <ndbm.h>
datum dbm_firstkey ( db)
DBM *db;
The dbm_firstkey subroutine returns the first key in a database.
| Item | Description |
|---|---|
| db | Specifies the database to access. |
Upon successful completion, this subroutine returns a datum structure containing the value returned for the specified key. If the subroutine is unsuccessful, a null value is indicated in the dptr field of the datum structure.