  ,        ,  -
,       -
     .

       
  ,     . , 
  ,    .

write(f, Sbuf, len);

    len       &buf 
,     f,     .
        sys_write (),
         ,  
 ,   f.    
  ,      -
         (   -
,       ).  . 12.2 -
    ,    
write ()       .   
  ,   VFS    -
      .

  Unix

  ,   Unix   , -
   : ,   (directory entry), -
 (inode)    (mount point).

        -
.    ,    -
 .  ,     -
,    (create),  (delete)   (mount).   Unix
         -
',     (namespace).    -
      2.

 (file)     .    -
 ,      .    -
 ,      ,   .
     (read),  (write),  (create)
  (delete).

    Linux       -
 , ..      .    
     ,  ,  
   .

    ,    ,  :.  -
      ,    -
   .      , 
          .

                                                     267