02/22/85  set_ring_brackets, srb

Syntax as a command:  srb path {ring_numbers}


Function: allows you to modify the ring brackets of a specified
segment, multisegment file (MSF), data management (DM) file, or
extended entry.


Arguments:
path
   is the relative or absolute pathname of the segment, MSF, DM file,
   or extended entry whose ring brackets are to be modified.
ring_numbers
   are the numbers that represent the ring brackets of the segment,
   MSF, DM file, or extended entry.  For a segment or MSF there are
   three ring brackets (rb1 rb2 rb3).  The ring brackets must be in the
   allowable range 0 through 7 and must have the ordering
      rb1 <= rb2 <= rb3


   If you omit rb1, rb2, and rb3, they are set to your current
   validation level.  The rb1 ring bracket is the number to be used as
   the first ring bracket of the segment; if omitted, you can't give
   rb2 and rb3 and rb1, rb2, and rb3 are set to your current validation
   level.  The rb2 ring bracket is the number to be used as the second
   ring bracket of the segment; if omitted, you can't give rb3, and it
   is set, by default, to rb1.  The rb3 ring bracket is the number to
   be used as the third ring bracket of the segment; if omitted, it is
   set to rb2.

   For a DM file there are only two ring brackets (rb1 rb2).  They have
   the same properties as rb1 and rb2 for segments.

   For an extended entry the ring brackets you can give depend on the
   entry type (see describe_entry_type).


Notes: Your process must have a validation level less than or equal to
rb1.  Ring brackets and validation levels are discussed in
"Intraprocess Access Control" of the Programmer's Reference Manual.


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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