aa12cea2cc
Although groff_mdoc(7) gives another impression, this is the ordering most widely used and also required by mdocml/mandoc. Reviewed by: ru Approved by: philip, ed (mentors)
117 lines
3.5 KiB
Groff
117 lines
3.5 KiB
Groff
.\" -*- nroff -*-
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.\"
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.\" Copyright (c) 1996 Doug Rabson
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.\"
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.\" All rights reserved.
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.\"
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.\" This program is free software.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd May 23, 2009
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.Dt VFS_STATFS 9
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.Os
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.Sh NAME
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.Nm VFS_STATFS
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.Nd return file system status
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.Sh SYNOPSIS
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.In sys/param.h
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.In sys/mount.h
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.In sys/vnode.h
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.Ft int
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.Fn VFS_STATFS "struct mount *mp" "struct statfs *sbp"
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.Sh DESCRIPTION
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The
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.Fn VFS_STATFS
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macro returns various pieces of information about the file system,
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including recommended I/O sizes, free space, free inodes, etc.
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.Pp
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The arguments it expects are:
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.Bl -tag -width sbp
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.It Fa mp
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The file system.
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.It Fa sbp
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A
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.Vt statfs
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structure, as defined by
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.In sys/mount.h ,
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into which information is placed about the file system.
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.El
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.Pp
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The fields of
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.Vt "struct statfs"
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related to the file system are as follows:
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.Bl -tag -width ".Va f_mntfromname"
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.It Va f_type
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Type of file system.
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.It Va f_flags
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A copy of mount exported flags.
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.It Va f_bsize
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Fragment size.
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.It Va f_iosize
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Optimal transfer block size.
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.It Va f_blocks
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The total number of data blocks in the file system.
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.It Va f_bfree
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The number of free blocks in the file system.
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.It Va f_bavail
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The number of free blocks available to non-superuser processes.
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.It Va f_files
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The total number of file nodes in the file system.
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.It Va f_ffree
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The number of free nodes available to non-superuser processes.
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.It Va f_syncwrites
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The number of synchronous writes since the file system was mounted.
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.It Va f_asyncwrites
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The number of asynchronous writes since the file system was mounted.
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.It Va f_syncreads
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The number of synchronous reads since the file system was mounted.
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.It Va f_asyncreads
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The number of asynchronous reads since the file system was mounted.
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.It Va f_namemax
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The maximum file name length for this file system.
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.It Va f_owner
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The user ID of the user that mounted the file system.
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.It Va f_fsid
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Unique file system ID.
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.It Va f_fstypename
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The file system type name; a string of at most
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.Dv MFSNAMELEN
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bytes.
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.It Va f_mntfromname
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The device name the file system was mounted from; a string of at most
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.Dv MNAMELEN
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bytes.
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.It Va f_mntonname
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The name of the directory on which the file system is mounted;
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a string of at most
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.Dv MNAMELEN
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bytes.
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.El
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.Sh SEE ALSO
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.Xr VFS 9 ,
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.Xr vnode 9
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.Sh AUTHORS
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This manual page was written by
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.An Doug Rabson .
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