182 lines
5.4 KiB
Groff
182 lines
5.4 KiB
Groff
.\" $NetBSD: df.1,v 1.33 2003/08/07 09:05:11 agc Exp $
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.\"
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.\" Copyright (c) 1989, 1990, 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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.\" @(#)df.1 8.2 (Berkeley) 1/13/92
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.\"
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.Dd April 18, 2003
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.Dt DF 1
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.Os
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.Sh NAME
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.Nm df
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.Nd display free disk space
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.Sh SYNOPSIS
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.Nm
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.Op Fl ahiklmnP
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.Op Fl t Ar type
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.Op Ar file | Ar file_system ...
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.Sh DESCRIPTION
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.Nm
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displays statistics about the amount of free disk space on the specified
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.Ar file_system
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or on the file system of which
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.Ar file
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is a part.
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Values are displayed in 512-byte per block block counts.
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If neither a file or a
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.Ar file_system
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operand is specified,
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statistics for all mounted file systems are displayed
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(subject to the
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.Fl l
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and
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.Fl t
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options below).
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.Pp
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Note that the printed count of available blocks takes
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.Va minfree
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into account, and thus will be negative when the number of free blocks
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on the filesystem is less than
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.Va minfree .
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.Pp
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The following options are available:
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.Bl -tag -width Ds
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.It Fl a
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Show all filesystems.
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By default only filesystems mounted with the
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.Dv MNT_IGNORE
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flag clear are shown.
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.It Fl g
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The
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.Fl g
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option causes the numbers to be reported in gigabytes (1024*1024*1024
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bytes).
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.It Fl h
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"Human-readable" output.
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Use unit suffixes: Byte, Kilobyte, Megabyte,
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Gigabyte, Terabyte, Petabyte, Exabyte in order to reduce the number of
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digits to four or less.
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.It Fl i
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Include statistics on the number of free inodes.
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.It Fl k
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By default, all sizes are reported in 512-byte block counts.
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The
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.Fl k
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option causes the numbers to be reported in kilobytes (1024 bytes).
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.It Fl l
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Display statistics only about mounted file systems with the
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.Dv MNT_LOCAL
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flag set.
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If a non-local file system is given as an argument, a
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warning is issued and no information is given on that file system.
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.It Fl m
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The
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.Fl m
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option causes the numbers to be reported in megabytes (1024*1024 bytes).
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.It Fl n
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Print out the previously obtained statistics from the file systems.
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This option should be used if it is possible that one or more
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file systems are in a state such that they will not be able to provide
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statistics without a long delay.
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When this option is specified,
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.Nm
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will not request new statistics from the file systems, but will respond
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with the possibly stale statistics that were previously obtained.
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.It Fl P
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Produce output in the following portable format:
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.Pp
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If both the
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.Fl P
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and
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.Fl k
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option are specified, the output will be preceded by the following header
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line, formatted to match the data following it:
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.Bd -literal
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"Filesystem 1024-blocks Used Available Capacity Mounted on\\n"
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.Ed
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.Pp
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If the
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.Fl P
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option is specified without the
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.Fl k
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options, the output will be preceded by the following header line,
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formatted to match the data following it:
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.Bd -literal
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"Filesystem \*[Lt]blksize\*[Gt]-blocks Used Available Capacity Mounted on\\n"
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.Ed
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.Pp
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The header line is followed by data formatted as follows:
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.Bd -literal
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"%s %d %d %d %d%% %s\\n", \*[Lt]file system name\*[Gt], \*[Lt]total space\*[Gt],
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\*[Lt]space used\*[Gt], \*[Lt]space free\*[Gt], \*[Lt]percentage used\*[Gt],
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\*[Lt]file system root\*[Gt]
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.Ed
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.It Fl t Ar type
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Is used to indicate the actions should only be taken on
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filesystems of the specified type.
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More than one type may be specified in a comma separated list.
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The list of filesystem types can be prefixed with
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.Dq no
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to specify the filesystem types for which action should
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.Em not
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be taken.
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If a file system is given on the command line that is not of
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the specified type, a warning is issued and no information is given on
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that file system.
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.El
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.Sh ENVIRONMENT
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.Bl -tag -width BLOCKSIZE
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.It Ev BLOCKSIZE
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If the environment variable
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.Ev BLOCKSIZE
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is set, and the
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.Fl k ,
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.Fl m
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and
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.Fl g
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options are not specified, the block counts will be displayed in units of that
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size block.
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.El
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.Sh SEE ALSO
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.Xr quota 1 ,
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.Xr fstatfs 2 ,
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.Xr getfsstat 2 ,
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.Xr statfs 2 ,
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.Xr getbsize 3 ,
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.Xr getmntinfo 3 ,
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.Xr fs 5 ,
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.Xr fstab 5 ,
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.Xr mount 8 ,
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.Xr quot 8 ,
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.Xr tunefs 8
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.Sh HISTORY
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A
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.Nm
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utility appeared in
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.At v6 .
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