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Add fsync(8). This becomes useful with the advent of MAP_NOSYNC etc.

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Reviewed by:	peter
This commit is contained in:
ps 2000-07-19 08:38:18 +00:00
parent 37dc146239
commit 70a9f15ed6
4 changed files with 124 additions and 0 deletions
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1
usr.bin/Makefile
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@ -49,6 +49,7 @@ SUBDIR= apply \
fold \
from \
fstat \
fsync \
ftp \
genassym \
gencat \

6
usr.bin/fsync/Makefile Normal file
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@ -0,0 +1,6 @@
# $FreeBSD$
PROG= fsync
MAN8= fsync.8
.include <bsd.prog.mk>

55
usr.bin/fsync/fsync.1 Normal file
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@ -0,0 +1,55 @@
.\" Copyright (c) 2000 Paul Saab <ps@FreeBSD.org>
.\" 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.
.\"
.\" 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.
.\"
.\" $FreeBSD$
.\"
.Dd June 15, 2000
.Dt FSYNC 8
.Os
.Sh NAME
.Nm fsync
.Nd synchronize a file's in-core state with that on disk
.Sh SYNOPSIS
.Nm fsync
.Ar file ...
.Sh DESCRIPTION
.Nm Fsync
causes all modified data and meta-data of
a file to be written to a permanent storage device.
.Pp
.Nm Fync
utilizes the
.Xr fync 2
function call.
.Sh SEE ALSO
.Xr fsync 2 ,
.Xr sync 2 ,
.Xr update 4 ,
.Xr halt 8 ,
.Xr reboot 8
.Sh HISTORY
The
.Nm
command first appeared in
.Fx 5.0 .

62
usr.bin/fsync/fsync.c Normal file
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@ -0,0 +1,62 @@
/*-
* Copyright (c) 2000 Paul Saab <ps@FreeBSD.org>
* 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.
*
* 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.
*
* $FreeBSD$
*/
#include <err.h>
#include <fcntl.h>
#include <stdio.h>
#include <sysexits.h>
#include <unistd.h>
void usage(void);
int
main(int argc, char *argv[])
{
int fd;
int i;
if (argc < 2)
usage();
for (i = 1; i < argc; ++i) {
if ((fd = open(argv[i], O_RDONLY)) < 0)
err(1, "open %s", argv[i]);
if (fsync(fd) != 0)
err(1, "fsync %s", argv[1]);
close(fd);
}
return(0);
}
void
usage()
{
fprintf(stderr, "usaged: fsync file ...\n");
exit(EX_USAGE);
}