2fe8fb192f
There is important information about booting non-ack images in docs/UPDATING. ack/aout-format images can't be built any more, and booting clang/ELF-format ones is a little different. Updating to the new boot monitor is recommended. Changes in this commit: . drop boot monitor -> allowing dropping ack support . facility to copy ELF boot files to /boot so that old boot monitor can still boot fairly easily, see UPDATING . no more ack-format libraries -> single-case libraries . some cleanup of OBJECT_FMT, COMPILER_TYPE, etc cases . drop several ack toolchain commands, but not all support commands (e.g. aal is gone but acksize is not yet). . a few libc files moved to netbsd libc dir . new /bin/date as minix date used code in libc/ . test compile fix . harmonize includes . /usr/lib is no longer special: without ack, /usr/lib plays no kind of special bootstrapping role any more and bootstrapping is done exclusively through packages, so releases depend even less on the state of the machine making them now. . rename nbsd_lib* to lib* . reduce mtree
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 $
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.\"
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.\" Copyright (c) 1989, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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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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.\" 3. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)statfs.2 8.5 (Berkeley) 5/24/95
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.\"
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.Dd April 14, 2004
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.Dt STATVFS 2
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.Os
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.Sh NAME
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.Nm statvfs ,
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.Nm statvfs1 ,
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.Nm fstatvfs ,
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.Nm fstatvfs1
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.Nd get file system statistics
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.In sys/statvfs.h
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.Ft int
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.Fn statvfs "const char *path" "struct statvfs *buf"
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.Ft int
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.Fn statvfs1 "const char *path" "struct statvfs *buf" "int flags"
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.Ft int
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.Fn fstatvfs "int fd" "struct statvfs *buf"
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.Ft int
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.Fn fstatvfs1 "int fd" "struct statvfs *buf" "int flags"
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.Sh DESCRIPTION
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.Fn statvfs
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and
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.Fn statvfs1
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return information about a mounted file system.
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.Fa path
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is the path name of any file within the mounted file system.
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.Fa buf
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is a pointer to a
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.Nm statvfs
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structure defined in
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.Xr statvfs 5 .
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.Pp
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.Fn fstatvfs
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and
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.Fn fstatvfs1
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return the same information about an open file referenced by descriptor
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.Fa fd .
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.Pp
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The
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.Fn statvfs1
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and
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.Fn fstatvfs1
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functions allow an extra
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.Fa flags
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argument which can be
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.Dv ST_WAIT
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and
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.Dv ST_NOWAIT .
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When
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.Dv ST_NOWAIT
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is specified, then only cached statistics are returned.
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This can result in significant savings on non-local filesystems, where
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gathering statistics involves a network communication.
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.Pp
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The
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.Fn statvfs
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and
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.Fn fstatvfs
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calls are equivalent to the respective
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.Fn statvfs1
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and
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.Fn fstatvfs1
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calls with
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.Dv ST_WAIT
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specified as the
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.Fa flags
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argument.
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.Sh RETURN VALUES
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Upon successful completion, a value of 0 is returned.
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Otherwise, \-1 is returned and the global variable
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.Va errno
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is set to indicate the error.
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.Sh ERRORS
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.Fn statvfs
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and
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.Fn statvfs1
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fail if one or more of the following are true:
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.Bl -tag -width Er
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.It Bq Er ENOTDIR
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A component of the path prefix of
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.Fa path
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is not a directory.
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.It Bq Er ENAMETOOLONG
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The length of a component of
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.Fa path
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exceeds
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.Brq Dv NAME_MAX
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characters, or the length of
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.Fa path
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exceeds
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.Brq Dv PATH_MAX
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characters.
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.It Bq Er ENOENT
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The file referred to by
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.Fa path
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does not exist.
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.It Bq Er EACCES
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Search permission is denied for a component of the path prefix of
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.Fa path .
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.It Bq Er ELOOP
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Too many symbolic links were encountered in translating
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.Fa path .
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.It Bq Er EFAULT
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.Fa buf
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or
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.Fa path
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points to an invalid address.
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.It Bq Er EIO
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An
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.Tn I/O
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error occurred while reading from or writing to the file system.
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.El
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.Pp
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.Fn fstatvfs
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and
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.Fn fstatvfs1
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fail if one or more of the following are true:
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.Bl -tag -width Er
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.It Bq Er EBADF
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.Fa fd
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is not a valid open file descriptor.
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.It Bq Er EFAULT
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.Fa buf
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points to an invalid address.
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.It Bq Er EIO
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An
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.Tn I/O
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error occurred while reading from or writing to the file system.
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.El
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.Sh SEE ALSO
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.Xr statvfs 5
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.Sh HISTORY
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The
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.Fn statvfs ,
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.Fn statvfs1 ,
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.Fn fstatvfs ,
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and
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.Fn fstatvfs1
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functions first appeared in
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.Nx 3.0
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to replace
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the
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.Fn statfs
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family of functions which first appeared in
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.Bx 4.4 .
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