diff options
| -rw-r--r-- | bin/sync/sync.8 | 6 | ||||
| -rw-r--r-- | lib/libc/sys/fsync.2 | 4 | ||||
| -rw-r--r-- | lib/libc/sys/sync.2 | 6 | ||||
| -rw-r--r-- | share/man/man4/Makefile | 2 | ||||
| -rw-r--r-- | share/man/man4/update.4 | 73 |
5 files changed, 82 insertions, 9 deletions
diff --git a/bin/sync/sync.8 b/bin/sync/sync.8 index 1dafffd..513b701 100644 --- a/bin/sync/sync.8 +++ b/bin/sync/sync.8 @@ -30,7 +30,7 @@ .\" SUCH DAMAGE. .\" .\" @(#)sync.8 8.1 (Berkeley) 5/31/93 -.\" $Id$ +.\" $Id: sync.8,v 1.2 1994/09/24 02:59:08 davidg Exp $ .\" .Dd May 31, 1993 .Dt SYNC 8 @@ -64,9 +64,9 @@ function call. .Sh SEE ALSO .Xr sync 2 , .Xr fsync 2 , +.Xr update 4 , .Xr halt 8 , -.Xr reboot 8 , -.Xr update 8 +.Xr reboot 8 .Sh HISTORY A .Nm sync diff --git a/lib/libc/sys/fsync.2 b/lib/libc/sys/fsync.2 index 1116cf9..313b4c7 100644 --- a/lib/libc/sys/fsync.2 +++ b/lib/libc/sys/fsync.2 @@ -94,8 +94,8 @@ An I/O error occurred while reading from or writing to the file system. .El .Sh SEE ALSO .Xr sync 2 , -.Xr sync 8 , -.Xr update 8 +.Xr update 4 , +.Xr sync 8 .Sh HISTORY The .Nm diff --git a/lib/libc/sys/sync.2 b/lib/libc/sys/sync.2 index 5e79fef..6309c18c 100644 --- a/lib/libc/sys/sync.2 +++ b/lib/libc/sys/sync.2 @@ -53,7 +53,7 @@ As information in the cache is lost after a system crash a call is issued frequently by the user process -.Xr update 8 +.Xr update 4 (about every 30 seconds). .Pp The function @@ -62,8 +62,8 @@ may be used to synchronize individual file descriptor attributes. .Sh SEE ALSO .Xr fsync 2 , -.Xr sync 8 , -.Xr update 8 +.Xr update 4 , +.Xr sync 8 .Sh BUGS .Fn Sync may return before the buffers are completely flushed. 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. |
