term% cat index.txt SYNC(2) System Calls Manual 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.
It should be used by programs which examine a file system, for example
icheck, df, etc. It is mandatory before a boot.
SEE ALSO
sync(1), update(8)
BUGS
The writing, although scheduled, is not necessarily complete upon re‐
turn from sync.
ASSEMBLER
(sync = 36.)
sys sync
SYNC(2)