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BSD 2.11 - man page for sync (bsd section 2)

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SYNC(2) 										  SYNC(2)

NAME
       sync - update super-block

SYNOPSIS
       sync()

DESCRIPTION
       Sync causes all information in core 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, for	example  fsck,	df,  etc.
       Sync is mandatory before a boot.

SEE ALSO
       fsync(2), sync(8), update(8)

BUGS
       The writing, although scheduled, is not necessarily complete upon return from sync.

4th Berkeley Distribution		  June 30, 1985 				  SYNC(2)
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