291 lines
7.4 KiB
Groff
291 lines
7.4 KiB
Groff
.\" $NetBSD: df.1,v 1.58 2022/08/09 08:13:56 wiz 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 August 8, 2022
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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 aclnW
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.Op Fl G | Fl bkP | Fl bfgHhikmN
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.Op Fl t Ar type
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.Oo Ar file | Ar file_system Oc Ns ...
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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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By default, all sizes are reported in 512-byte 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,
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and not hidden (i.e.: not mounted with
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.Dv MNT_IGNORE ) ,
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file systems are displayed
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(subject to the
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.Fl a ,
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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 file system 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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If no
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.Ar file ,
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or
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.Ar file_system
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arguments are givem, show all mount points,
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including those that were mounted with the
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.Dv MNT_IGNORE
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flag.
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Note that for file systems specified on the command
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line, that mount option is never considered.
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.It Fl b
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Show space as units of basic blocks (512 bytes).
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This is normally the default; this option can be used to
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override a conflicting setting in the environment variable
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.Ev BLOCKSIZE .
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.It Fl c
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Display a grand total for all shown mount points.
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When combined with
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.Fl f
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only the total for the mount points which otherwise
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would be included is shown, not the individual entries.
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.It Fl f
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Display only the available free space (or with
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.Fl i ,
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free inodes) in a minimal format.
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When there is to be only one line of output, only the value
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is shown, otherwise the value and the mount point,
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separated by a single space, are printed.
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For free space, the
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.Fl b ,
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.Fl g ,
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.Fl H ,
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.Fl h ,
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.Fl k
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and
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.Fl m
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options, and
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.Ev BLOCKSIZE
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are all used as normal.
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This option implies
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.Fl N
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and is incompatible with
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.Fl P
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and
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.Fl G .
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.It Fl G
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Display all the fields of the structure(s) returned by
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.Xr statvfs 2 .
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This option cannot be used with the
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.Fl f ,
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.Fl i
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or
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.Fl P
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options, and is modelled after the Solaris
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.Fl g
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option.
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This option will override the
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.Fl b ,
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.Fl g ,
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.Fl H ,
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.Fl h ,
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.Fl k
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and
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.Fl m
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options, as well as any setting of
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.Ev BLOCKSIZE .
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.It Fl g
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The
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.Fl g
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option causes size 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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Use
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.Dq human-readable
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output for space data.
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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 H
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As with
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.Fl h
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but using powers of 10 (1000) rather than 2 (1024).
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.It Fl i
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Include statistics on the number of free inodes.
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When combined with
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.Fl f
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only the number of free inodes is shown.
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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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unless the
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.Ev BLOCKSIZE
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environment variable is set.
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The
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.Fl k
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option causes the size 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 size numbers to be reported in megabytes (1024*1024 bytes).
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.It Fl N
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Suppress the header line normally output.
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This option is ignored with
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.Fl G
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which has no header line to ignore,
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and with
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.Fl P
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which requires the header line to maintain
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the portable format it is designed to emulate.
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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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The output will be preceded by the following header line:
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.Bd -literal
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"Filesystem <blksize>-blocks Used Available Capacity Mounted on\en"
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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\en", <file system name>, <total space>,
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<space used>, <space free>, <percentage used>,
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<file system root>
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.Ed
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.Pp
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Note that the
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.Fl i
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option may not be specified with
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.Fl P ,
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and the
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.Ar blksize
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is required to be 512 or 1024.
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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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file systems 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 file system types can be prefixed with
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.Dq no
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to specify the file system 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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.It Fl W
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Print the wedge name instead of the mounted from device for wedges.
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The wedge name is prefixed with
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.Dq NAME=
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as in
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.Xr fstab 5 .
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If the wedge information cannot be obtained for one or more
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file systems, the
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.Fl W
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option is silently ignored for those file systems.
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.El
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.Pp
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If more than one of
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.Fl b ,
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.Fl g ,
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.Fl H ,
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.Fl h ,
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.Fl k
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or
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.Fl m
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is given, the last of those specified is used.
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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 none of the
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.Fl b ,
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.Fl g ,
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.Fl H ,
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.Fl h ,
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.Fl k
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and
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.Fl m
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options are specified,
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the block counts will be displayed in units of that 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 fstatvfs 2 ,
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.Xr getvfsstat 2 ,
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.Xr statvfs 2 ,
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.Xr getbsize 3 ,
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.Xr getmntinfo 3 ,
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.Xr humanize_number 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 v1 .
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The
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.Fl f
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option was added in
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.Nx 10 .
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