sync(2)                          UNIX System V                          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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