11/13/84 dm_lock_status

Syntax:  dm_lock_status {-control_args}


Function:  This command displays the status of all of the locks
currently held or awaited by all transactions.


Control arguments:
-all_transactions, -atxn
   displays lock data for all transactions.
-current_transaction, -ctxn
   displays lock data for the current transaction in the user's
   process.  (DEFAULT)
-file_locks, -flk
   displays file-level locks.  (DEFAULT)
-no_file_locks, -nflk
   suppresses the display of file-level locks.
-control_interval_locks, -cilk
   displays control-interval-level locks.  (DEFAULT)
-no_control_interval_locks, -ncilk
   suppresses the display of control-interval-level locks.
-header, -he
   displays data from the header of the lock database.
-no_header, -nhe
   suppresses the display of data from the header of the lock database.
   (DEFAULT)


Notes:  This command requires e (execute) access to the dm_admin_gate_.


Examples:
 !  dm_lock_status

    Spratt.Multics 017400343566  Transaction 000000000326
         Lock  UID=000000000001 CI=-1
        Owner Spratt.Multics 017400343566  Mode  IX



 !  dm_lock_status -he

    lock_seg
       header
          lock=                  142970279124797489152
          n_lock_segments=       1
          lock_seg_size=         4096
          max_lock_segments=     100
          n_transaction_table_entries= 32
          n_hash_table_entries=  256
          hash_mask=             377o
          free_list_ptr
             seg_inx=            1
             offset=             578
          transaction_table_offset= 16
          hash_table_offset=     272
          n_lock_blocks=         588
          lock_array_offset=     566



    Spratt.Multics 017400343566  Transaction 000000000326
         Lock  UID=000000000001 CI=-1
        Owner Spratt.Multics 017400343566  Mode  IX





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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