.\" SCCSID: @(#)sync.2	8.2	1/28/91.TH sync 2.SH Namesync \- update super-block.SH Syntax.B void sync().SH Description.NXR "sync system call".NXR "file system" "examining"The.PN syncsystem call causes all information in memory that should be on disk to be written out.This includes modified superblocks,modified i-nodes, and delayed block I/O..PPPrograms that examine a file system,for example,.PN "fsck"or.PN "df,"use the .PN syncsystem call.The writing, although scheduled, is not necessarilycomplete upon return from .PN sync ..SH See Alsosync(1), fsync(2), update(8)