sync(2)                                                             sync(2)


   NAME
         sync - update super block

   SYNOPSIS
         #include <unistd.h>

         void sync(void);

   DESCRIPTION
         sync causes all information in 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 that examine a file system, such as
         fsck(1M), df(1M), etc.  It is mandatory before a re-boot.

         The writing, although scheduled, is not necessarily completed before
         sync returns.  The fsync system call completes the writing before it
         returns.

   SEE ALSO
         fsync(2)































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