vms_filespec

    The address of a null-terminated string containing a name in
    OpenVMS file specification format.

 action_routine

    The address of a routine that takes as its only argument a null-
    terminated string containing the translation of the given OpenVMS
    filename to a valid UNIX style filename.

    If the action_routine returns a nonzero value (TRUE), file
    translation continues. If it returns a zero value (FALSE), no
    further file translation takes place.

 wild_flag

    Either 0 or 1, passed by value. If a 0 is specified, wildcards
    found in vms_filespec are not expanded. Otherwise, wildcards
    are expanded and each one is passed to action_routine. Only
    expanded filenames that correspond to existing UNIX style files
    are included.