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SYNC(2)                       System Calls Manual                      SYNC(2)



NAME
       sync - update super-block

SYNOPSIS
       sync( )

DESCRIPTION
       Sync causes all information in core memory that should be on disk to be
       written out.  This includes modified super  blocks,  modified  i-nodes,
       and delayed block I/O.

       It  should be used by programs which examine a file system, for example
       icheck, df, etc.  It is mandatory before a boot.

SEE ALSO
       sync(1), update(8)

BUGS
       The writing, although  scheduled,  is  not  necessarily  complete  upon
       return from sync.

ASSEMBLER
       (sync = 36.)
       sys sync



                                                                       SYNC(2)