| sync.2 (50476) | sync.2 (57686) |
|---|---|
| 1.\" Copyright (c) 1980, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. --- 16 unchanged lines hidden (view full) --- 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" @(#)sync.2 8.1 (Berkeley) 6/4/93 | 1.\" Copyright (c) 1980, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. --- 16 unchanged lines hidden (view full) --- 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" @(#)sync.2 8.1 (Berkeley) 6/4/93 |
| 33.\" $FreeBSD: head/lib/libc/sys/sync.2 50476 1999-08-28 00:22:10Z peter $ | 33.\" $FreeBSD: head/lib/libc/sys/sync.2 57686 2000-03-02 09:14:21Z sheldonh $ |
| 34.\" 35.Dd June 4, 1993 36.Dt SYNC 2 37.Os BSD 4 38.Sh NAME 39.Nm sync 40.Nd "synchronize disk block in-core status with that on disk" 41.Sh SYNOPSIS 42.Fd #include <unistd.h> 43.Ft void 44.Fn sync void 45.Sh DESCRIPTION 46The 47.Fn sync 48function forces a write of dirty (modified) buffers 49in the block buffer cache out | 34.\" 35.Dd June 4, 1993 36.Dt SYNC 2 37.Os BSD 4 38.Sh NAME 39.Nm sync 40.Nd "synchronize disk block in-core status with that on disk" 41.Sh SYNOPSIS 42.Fd #include <unistd.h> 43.Ft void 44.Fn sync void 45.Sh DESCRIPTION 46The 47.Fn sync 48function forces a write of dirty (modified) buffers 49in the block buffer cache out |
| 50to disk. The kernel keeps this information in core to reduce | 50to disk. 51The kernel keeps this information in core to reduce |
| 51the number of disk I/O transfers required by the system. 52As information in the cache is lost after a system crash a 53.Fn sync 54call is issued 55frequently 56by the user process 57.Xr update 4 58(about every 30 seconds). --- 17 unchanged lines hidden --- | 52the number of disk I/O transfers required by the system. 53As information in the cache is lost after a system crash a 54.Fn sync 55call is issued 56frequently 57by the user process 58.Xr update 4 59(about every 30 seconds). --- 17 unchanged lines hidden --- |