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.

     sync() should be used by programs that examine a file system, such as
     fsck(1M) or df(1). sync() 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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