03/15/85  read_write_allowed_


Entry points in read_write_allowed_:
   (List is generated by the help command)


:Entry:  read_write_allowed_:  03/15/85  read_write_allowed_


Function:
The read_write_allowed_ function determines whether a subject of
specified authorization can read, append, modify, and destroy data in
an object of specified access class.


Syntax:
declare read_write_allowed_ entry (bit(72) aligned, bit(72) aligned)
     returns (bit(1) aligned);
returned_bit = read_write_allowed_ (authorization, access_class);


Arguments:
authorization
   is the authorization of the subject.  (Input)
access_class
   is the access class of the object.  (Input)
returned_bit
   indicates whether the subject is allowed to both read and write the
   object.  (Output)
   "1"b read and write are allowed.
   "0"b read and write are not allowed.


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Historical Background

This edition of the Multics software materials and documentation is provided and donated
to Massachusetts Institute of Technology by Group BULL including BULL HN Information Systems Inc. 
as a contribution to computer science knowledge.  
This donation is made also to give evidence of the common contributions of Massachusetts Institute of Technology,
Bell Laboratories, General Electric, Honeywell Information Systems Inc., Honeywell BULL Inc., Groupe BULL
and BULL HN Information Systems Inc. to the development of this operating system. 
Multics development was initiated by Massachusetts Institute of Technology Project MAC (1963-1970),
renamed the MIT Laboratory for Computer Science and Artificial Intelligence in the mid 1970s, under the leadership
of Professor Fernando Jose Corbato. Users consider that Multics provided the best software architecture 
for managing computer hardware properly and for executing programs. Many subsequent operating systems 
incorporated Multics principles.
Multics was distributed in 1975 to 2000 by Group Bull in Europe , and in the U.S. by Bull HN Information Systems Inc., 
as successor in interest by change in name only to Honeywell Bull Inc. and Honeywell Information Systems Inc. .

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Permission to use, copy, modify, and distribute these programs and their documentation for any purpose and without
fee is hereby granted,provided that the below copyright notice and historical background appear in all copies
and that both the copyright notice and historical background and this permission notice appear in supporting
documentation, and that the names of MIT, HIS, BULL or BULL HN not be used in advertising or publicity pertaining
to distribution of the programs without specific prior written permission.
    Copyright 1972 by Massachusetts Institute of Technology and Honeywell Information Systems Inc.
    Copyright 2006 by BULL HN Information Systems Inc.
    Copyright 2006 by Bull SAS
    All Rights Reserved