1 03/18/76   set_acl, sa
 2 
 3 Function:  sets the access control lists (ACLs) of files.
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 5 
 6 Syntax:  sa file_name mode1 {User_id1 ... modeN User_idN}
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 8 
 9 Arguments:
10 file_name  name of file; star convention can be used.
11 modei  access mode; can be any or all of the letters rew (or
12  null, n, or "" for null access).
13 User_idi  access control name of the form Person_id.Project_id.tag.
14  If the last modei has no following User_id, user's Person_id and
15  Project_id are assumed.