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.Dd January 25, 2005 26.Dt FSYNC 1 27.Os 28.Sh NAME 29.Nm fsync 30.Nd synchronize a file's in-core state with that on disk 31.Sh SYNOPSIS 32.Nm 33.Ar 34.Sh DESCRIPTION 35The 36.Nm 37utility causes all the modified data and meta-data of 38all the files named on the command line 39to be written to a permanent storage device. 40.Pp 41The 42.Nm 43utility uses the 44.Xr fsync 2 45function call. 46.Sh EXIT STATUS 47If an error occurs, the 48.Nm 49utility proceeds to the next file, and exits >0. 50Otherwise, it exits 0. 51.Sh SEE ALSO 52.Xr fsync 2 , 53.Xr sync 2 , 54.Xr syncer 4 , 55.Xr halt 8 , 56.Xr reboot 8 57.Sh HISTORY 58The 59.Nm 60command first appeared in 61.Fx 4.3 . 62