This patch imports the unmodified current version of NetBSD libc. The NetBSD includes are in /nbsd_include, while the libc code itself is split between lib/nbsd_libc and common/lib/libc.
178 lines
4.4 KiB
Groff
178 lines
4.4 KiB
Groff
.\" $NetBSD: statvfs.2,v 1.5 2010/05/31 12:16:20 njoly Exp $
|
|
.\"
|
|
.\" Copyright (c) 1989, 1991, 1993
|
|
.\" The Regents of the University of California. 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.
|
|
.\" 3. Neither the name of the University nor the names of its contributors
|
|
.\" may be used to endorse or promote products derived from this software
|
|
.\" without specific prior written permission.
|
|
.\"
|
|
.\" 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.
|
|
.\"
|
|
.\" @(#)statfs.2 8.5 (Berkeley) 5/24/95
|
|
.\"
|
|
.Dd April 14, 2004
|
|
.Dt STATVFS 2
|
|
.Os
|
|
.Sh NAME
|
|
.Nm statvfs ,
|
|
.Nm statvfs1 ,
|
|
.Nm fstatvfs ,
|
|
.Nm fstatvfs1
|
|
.Nd get file system statistics
|
|
.Sh LIBRARY
|
|
.Lb libc
|
|
.Sh SYNOPSIS
|
|
.In sys/statvfs.h
|
|
.Ft int
|
|
.Fn statvfs "const char *path" "struct statvfs *buf"
|
|
.Ft int
|
|
.Fn statvfs1 "const char *path" "struct statvfs *buf" "int flags"
|
|
.Ft int
|
|
.Fn fstatvfs "int fd" "struct statvfs *buf"
|
|
.Ft int
|
|
.Fn fstatvfs1 "int fd" "struct statvfs *buf" "int flags"
|
|
.Sh DESCRIPTION
|
|
.Fn statvfs
|
|
and
|
|
.Fn statvfs1
|
|
return information about a mounted file system.
|
|
.Fa path
|
|
is the path name of any file within the mounted file system.
|
|
.Fa buf
|
|
is a pointer to a
|
|
.Nm statvfs
|
|
structure defined in
|
|
.Xr statvfs 5 .
|
|
.Pp
|
|
.Fn fstatvfs
|
|
and
|
|
.Fn fstatvfs1
|
|
return the same information about an open file referenced by descriptor
|
|
.Fa fd .
|
|
.Pp
|
|
The
|
|
.Fn statvfs1
|
|
and
|
|
.Fn fstatvfs1
|
|
functions allow an extra
|
|
.Fa flags
|
|
argument which can be
|
|
.Dv ST_WAIT
|
|
and
|
|
.Dv ST_NOWAIT .
|
|
When
|
|
.Dv ST_NOWAIT
|
|
is specified, then only cached statistics are returned.
|
|
This can result in significant savings on non-local filesystems, where
|
|
gathering statistics involves a network communication.
|
|
.Pp
|
|
The
|
|
.Fn statvfs
|
|
and
|
|
.Fn fstatvfs
|
|
calls are equivalent to the respective
|
|
.Fn statvfs1
|
|
and
|
|
.Fn fstatvfs1
|
|
calls with
|
|
.Dv ST_WAIT
|
|
specified as the
|
|
.Fa flags
|
|
argument.
|
|
.Sh RETURN VALUES
|
|
Upon successful completion, a value of 0 is returned.
|
|
Otherwise, \-1 is returned and the global variable
|
|
.Va errno
|
|
is set to indicate the error.
|
|
.Sh ERRORS
|
|
.Fn statvfs
|
|
and
|
|
.Fn statvfs1
|
|
fail if one or more of the following are true:
|
|
.Bl -tag -width Er
|
|
.It Bq Er ENOTDIR
|
|
A component of the path prefix of
|
|
.Fa path
|
|
is not a directory.
|
|
.It Bq Er ENAMETOOLONG
|
|
The length of a component of
|
|
.Fa path
|
|
exceeds
|
|
.Brq Dv NAME_MAX
|
|
characters, or the length of
|
|
.Fa path
|
|
exceeds
|
|
.Brq Dv PATH_MAX
|
|
characters.
|
|
.It Bq Er ENOENT
|
|
The file referred to by
|
|
.Fa path
|
|
does not exist.
|
|
.It Bq Er EACCES
|
|
Search permission is denied for a component of the path prefix of
|
|
.Fa path .
|
|
.It Bq Er ELOOP
|
|
Too many symbolic links were encountered in translating
|
|
.Fa path .
|
|
.It Bq Er EFAULT
|
|
.Fa buf
|
|
or
|
|
.Fa path
|
|
points to an invalid address.
|
|
.It Bq Er EIO
|
|
An
|
|
.Tn I/O
|
|
error occurred while reading from or writing to the file system.
|
|
.El
|
|
.Pp
|
|
.Fn fstatvfs
|
|
and
|
|
.Fn fstatvfs1
|
|
fail if one or more of the following are true:
|
|
.Bl -tag -width Er
|
|
.It Bq Er EBADF
|
|
.Fa fd
|
|
is not a valid open file descriptor.
|
|
.It Bq Er EFAULT
|
|
.Fa buf
|
|
points to an invalid address.
|
|
.It Bq Er EIO
|
|
An
|
|
.Tn I/O
|
|
error occurred while reading from or writing to the file system.
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr statvfs 5
|
|
.Sh HISTORY
|
|
The
|
|
.Fn statvfs ,
|
|
.Fn statvfs1 ,
|
|
.Fn fstatvfs ,
|
|
and
|
|
.Fn fstatvfs1
|
|
functions first appeared in
|
|
.Nx 3.0
|
|
to replace
|
|
the
|
|
.Fn statfs
|
|
family of functions which first appeared in
|
|
.Bx 4.4 .
|