[unix-history] / 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	6.2 (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
.I Sync
should be used by programs that examine a file system,
for example
.I "fsck, df,"
etc.
.I Sync
is mandatory before a boot.
.SH "SEE ALSO"
fsync(2), sync(8), update(8)
.SH BUGS
The writing, although scheduled, is not necessarily
complete upon return from 
.IR sync .
Commit	Line	Data
5f440b1e KM	1	.\" Copyright (c) 1980 Regents of the University of California.
	2	.\" All rights reserved. The Berkeley software License Agreement
	3	.\" specifies the terms and conditions for redistribution.
	4	.\"
eff6446c	5	.\" @(#)sync.2 6.2 (Berkeley) %G%
5f440b1e	6	.\"
b7bb0a6a	7	.TH SYNC 2 ""
5f440b1e KM	8	.UC 4
	9	.SH NAME
	10	sync \- update super-block
	11	.SH SYNOPSIS
	12	.B sync()
	13	.SH DESCRIPTION
	14	.I Sync
	15	causes all information in core
	16	memory that should be on disk to be written out.
	17	This includes modified super blocks,
	18	modified i-nodes, and delayed block I/O.
	19	.PP
0175ba9c	20	.I Sync
eff6446c	21	should be used by programs that examine a file system,
5f440b1e	22	for example
0175ba9c	23	.I "fsck, df,"
5f440b1e	24	etc.
0175ba9c KM	25	.I Sync
0175ba9c KM	26	is mandatory before a boot.
5f440b1e	27	.SH "SEE ALSO"
0175ba9c	28	fsync(2), sync(8), update(8)
5f440b1e KM	29	.SH BUGS
	30	The writing, although scheduled, is not necessarily
	31	complete upon return from
	32	.IR sync .