sync(2)                   SYSTEM CALLS                    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  com-
     pleted before sync returns.  The fsync system call completes
     the writing before it returns.

SEE ALSO
     fsync(2)
































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