Using the CLI$PRESENT and CLI$GET_VALUE routines, the UTIL$CQUAL_
    FILE_PARSE routine searches the command line for the qualifiers
    specified in the flags longword. When command line parsing
    finishes, UTIL$CQUAL_FILE_PARSE returns a pointer to the common
    file qualifier value in the context parameter.

    The context parameter must be used when calling either the
    UTIL$CQUAL_FILE_MATCH or UTIL$CQUAL_FILE_END routines. If a
    third parameter is specified, UTIL$CQUAL_FILE_PARSE returns a
    longword of flags indicating which qualifiers were found during
    the command line parse. The mask and field specifiers are listed
    in UTIL$CQUAL_FILE_PARSE Flags and Masks.