Description: integrity of the file system simulation basic functions (1) Multi-user (2) Multi-level directory : with the tree structure; (3) having a login (user login) and user authentication functions; (4) Documentation of the founders : create (5) documents the open : open (6) the documents read : read (7) of the document reads : write (8) documents Close : close (9) delete the file : delete (12) provides directory : dir (listed directory to list name, physical address and length of documents) (13) withdrew : logout (14) document protection mechanisms
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