usr/src/lib/libc/sys/sync.2

.\" Copyright (c) 1980 Regents of the University of California.
.\" All rights reserved.  The Berkeley software License Agreement
.\" specifies the terms and conditions for redistribution.
.\"
.\"     @(#)sync.2      4.1 (Berkeley) %G%
.\"
.TH SYNC 2
.UC 4
.SH NAME
sync \- update super-block
.SH SYNOPSIS
.B sync()
.SH DESCRIPTION
.I 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.
.PP
It should be used by programs which examine a file system,
for example
.I "icheck, df,"
etc.
It is mandatory before a boot.
.SH "SEE ALSO"
sync(1), update(8)
.SH BUGS
The writing, although scheduled, is not necessarily
complete upon return from
.IR sync .
.SH "ASSEMBLER (PDP-11)"
(sync = 36.)
.br
.B sys sync