sync(2)								       sync(2)

NAME    [Toc]    [Back]

     sync - update super block

SYNOPSIS    [Toc]    [Back]

     #include <unistd.h>

     void sync(void);

DESCRIPTION    [Toc]    [Back]

     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    [Toc]    [Back]

     fsync(2)


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