diff options
author | mpp <mpp@FreeBSD.org> | 1996-02-12 00:45:47 +0000 |
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committer | mpp <mpp@FreeBSD.org> | 1996-02-12 00:45:47 +0000 |
commit | 1d267ab1ce64a53fcecd133f0ab0666fb6d7bd60 (patch) | |
tree | c63852f4eea28a623ec1d6830c9dc0ff72ab167f /share | |
parent | 3ad82b58d696d3c45fce0b0e63be5aacbca13e2f (diff) | |
download | FreeBSD-src-1d267ab1ce64a53fcecd133f0ab0666fb6d7bd60.zip FreeBSD-src-1d267ab1ce64a53fcecd133f0ab0666fb6d7bd60.tar.gz |
Added a update(4) man page to describe the kernel initiated update
process and changed all of the old references to update(8) to update(4).
Diffstat (limited to 'share')
-rw-r--r-- | share/man/man4/Makefile | 2 | ||||
-rw-r--r-- | share/man/man4/update.4 | 73 |
2 files changed, 74 insertions, 1 deletions
diff --git a/share/man/man4/Makefile b/share/man/man4/Makefile index ff41e7f..c15d1d6 100644 --- a/share/man/man4/Makefile +++ b/share/man/man4/Makefile @@ -5,7 +5,7 @@ MAN4= bpf.4 cd.4 ch.4 clnp.4 cltp.4 ddb.4 drum.4 esis.4 fd.4 fpa.4 \ lkm.4 lo.4 netintro.4 ns.4 \ nsip.4 null.4 pt.4 pty.4 route.4 \ scsi.4 sd.4 snp.4 spp.4 st.4 su.4 tcp.4 \ - ttcp.4 termios.4 tp.4 tty.4 udp.4 uk.4 unix.4 worm.4 yp.4 + ttcp.4 termios.4 tp.4 tty.4 udp.4 uk.4 update.4 unix.4 worm.4 yp.4 MLINKS+=fd.4 stderr.4 fd.4 stdin.4 fd.4 stdout.4 MLINKS+=netintro.4 networking.4 MLINKS+=ipfirewall.4 ipacct.4 ipfirewall.4 ipfw.4 ipfirewall.4 ipaccounting.4 diff --git a/share/man/man4/update.4 b/share/man/man4/update.4 new file mode 100644 index 0000000..f78fcef --- /dev/null +++ b/share/man/man4/update.4 @@ -0,0 +1,73 @@ +.\" Copyright (c) 1996 +.\" Mike Pritchard <mpp@FreeBSD.org>. All rights reserved. +.\" +.\" Copyright (c) 1991, 1993 +.\" The Regents of the University of California. All rights reserved. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" 3. All advertising materials mentioning features or use of this software +.\" must display the following acknowledgement: +.\" This product includes software developed by the University of +.\" California, Berkeley and its contributors. +.\" 4. Neither the name of the University nor the names of its contributors +.\" may be used to endorse or promote products derived from this software +.\" without specific prior written permission. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND +.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE +.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +.\" SUCH DAMAGE. +.\" +.Dd February 11, 1996 +.Dt UPDATE 4 +.Os FreeBSD +.Sh NAME +.Nm update +.Nd flush internal filesystem caches to disk frequently +.Sh SYNOPSIS +.Nm update +.Sh DESCRIPTION +The +.Nm update +kernel process helps protect the integrity of disk volumes +by flushing +volatile cached filesystem data +to disk at thirty second intervals. +.Nm Update +does the equivalent of the +.Xr sync 2 +function call to do the task. +.Sh SEE ALSO +.Xr sync 2 , +.Xr fsck 8 , +.Xr init 8 , +.Xr rc 8 , +.Xr sync 8 +.Sh BUGS +It is possible on some systems that a +.Xr sync +occurring simultaneously with a crash may cause +file system damage. See +.Xr fsck 8 . +.Sh HISTORY +An +.Nm update +command appeared in +.At v6 , +and was usually started by /etc/rc when the system went multi-user. +.Nm Update +was turned into a kernel initiated process in FreeBSD 2.0. |