NDBM_File(3pm)

Tied access to ndbm files

NAME

NDBM_File - Tied access to ndbm files

 use NDBM_File;
 use Fcntl;       # for O_ constants

 tie(%h, 'NDBM_File', 'Op.dbmx', O_RDWR⎪O_CREAT, 0640);

 untie %h;

See the tie entry in the perlfunc manpage