1.\" Copyright (c) 2000 Paul Saab <ps@FreeBSD.org> 2.\" 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. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 13.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 14.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 17.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23.\" SUCH DAMAGE. 24.\" 25.\" $FreeBSD$ 26.\" 27.Dd January 25, 2005 28.Dt FSYNC 1 29.Os 30.Sh NAME 31.Nm fsync 32.Nd synchronize a file's in-core state with that on disk 33.Sh SYNOPSIS 34.Nm 35.Ar 36.Sh DESCRIPTION 37The 38.Nm 39utility causes all the modified data and meta-data of 40all the files named on the command line 41to be written to a permanent storage device. 42.Pp 43The 44.Nm 45utility uses the 46.Xr fsync 2 47function call. 48.Sh EXIT STATUS 49If an error occurs, the 50.Nm 51utility proceeds to the next file, and exits >0. 52Otherwise, it exits 0. 53.Sh SEE ALSO 54.Xr fsync 2 , 55.Xr sync 2 , 56.Xr syncer 4 , 57.Xr halt 8 , 58.Xr reboot 8 59.Sh HISTORY 60The 61.Nm 62command first appeared in 63.Fx 4.3 . 64