Octave's password database functions return information in a structure with the following fields.
In the descriptions of the following functions, this data structure is referred to as a pw_struct.
Return a structure containing an entry from the password database, opening it if necessary. Once the end of the data has been reached,
Return a structure containing the first entry from the password database with the user ID uid. If the user ID does not exist in the database,
Return a structure containing the first entry from the password database with the user name name. If the user name does not exist in the database,
Return the internal pointer to the beginning of the password database.