'\" te
.\" Copyright (c) 2003, Sun Microsystems, Inc. All Rights Reserved.
.\" Copyright 1989 AT&T
.\" Portions Copyright (c) 1992, X/Open Company Limited All Rights Reserved Portions
.\" Sun Microsystems, Inc. gratefully acknowledges The Open Group for permission to reproduce portions of its copyrighted documentation. Original documentation from The Open Group can be obtained online at  http://www.opengroup.org/bookstore/.
.\" The Institute of Electrical and Electronics Engineers and The Open Group, have given us permission to reprint portions of their documentation. In the following statement, the phrase "this text" refers to portions of the system documentation. Portions of this text
.\" are reprinted and reproduced in electronic form in the Sun OS Reference Manual, from IEEE Std 1003.1, 2004 Edition, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2004 by the Institute of Electrical
.\" and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between these versions and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html.
.\"  This notice shall appear on any product containing this material.
.\" The contents of this file are subject to the terms of the Common Development and Distribution License (the "License"). You may not use this file except in compliance with the License. You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing.
.\" See the License for the specific language governing permissions and limitations under the License. When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE. If applicable, add the following below this CDDL HEADER, with the
.\" fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
.TH DF 1M "Jul 26, 2009"
.SH NAME
df \- displays number of free disk blocks and free files
.SH SYNOPSIS
.LP
.nf
\fB/usr/bin/df\fR [\fB-F\fR \fIFSType\fR] [\fB-abeghklntVvZ\fR]
     [\fB-o\fR \fIFSType-specific_options\fR]
     [\fIblock_device\fR | \fIdirectory\fR | \fIfile\fR | \fIresource\fR ...]
.fi

.LP
.nf
\fB/usr/xpg4/bin/df\fR [\fB-F\fR \fIFSType\fR] [\fB-abeghklnPtVZ\fR]
     [\fB-o\fR \fIFSType-specific_options\fR]
     [\fIblock_device\fR | \fIdirectory\fR | \fIfile\fR | \fIresource\fR ...]
.fi

.SH DESCRIPTION
.sp
.LP
The \fBdf\fR utility displays the amount of disk space occupied by mounted or
unmounted file systems, the amount of used and available space, and how much of
the file system's total capacity has been used. The file system is specified by
device, or by referring to a file or directory on the specified file system.
.sp
.LP
Used without operands or options, \fBdf\fR reports on all mounted file systems.
.sp
.LP
\fBdf\fR may not be supported for all \fIFSTypes\fR.
.sp
.LP
If \fBdf\fR is run on a networked mount point that the automounter has not yet
mounted, the file system size will be reported as zero. As soon as the
automounter mounts the file system, the sizes will be reported correctly.
.SH OPTIONS
.sp
.LP
The following options are supported for both \fB/usr/bin/df\fR and
\fB/usr/xpg4/bin/df\fR:
.sp
.ne 2
.na
\fB\fB-a\fR\fR
.ad
.sp .6
.RS 4n
Reports on all file systems including ones whose entries in \fB/etc/mnttab\fR
(see \fBmnttab\fR(4)) have the \fBignore\fR option set.
.RE

.sp
.ne 2
.na
\fB\fB-b\fR\fR
.ad
.sp .6
.RS 4n
Prints the total number of kilobytes free.
.RE

.sp
.ne 2
.na
\fB\fB-e\fR\fR
.ad
.sp .6
.RS 4n
Prints only the number of files free.
.RE

.sp
.ne 2
.na
\fB\fB-F\fR \fIFSType\fR\fR
.ad
.sp .6
.RS 4n
Specifies the \fIFSType\fR on which to operate. The \fB-F\fR option is intended
for use with unmounted file systems. The \fIFSType\fR should be specified here
or be determinable from \fB/etc/vfstab\fR (see \fBvfstab\fR(4)) by matching the
\fIdirectory\fR, \fIblock_device\fR, or \fIresource\fR with an entry in the
table, or by consulting \fB/etc/default/fs\fR. See \fBdefault_fs\fR(4).
.RE

.sp
.ne 2
.na
\fB\fB-g\fR\fR
.ad
.sp .6
.RS 4n
Prints the entire \fBstatvfs\fR(2) structure. This option is used only for
mounted file systems. It can not be used with the \fB-o\fR option. This option
overrides the \fB-b\fR, \fB-e\fR, \fB-k\fR, \fB-n\fR, \fB-P\fR, and \fB-t\fR
options.
.RE

.sp
.ne 2
.na
\fB\fB-h\fR\fR
.ad
.sp .6
.RS 4n
Like \fB-k\fR, except that sizes are in a more human readable format. The
output consists of one line of information for each specified file system. This
information includes the file system name, the total space allocated in the
file system, the amount of space allocated to existing files, the total amount
of space available for the creation of new files by unprivileged users, and the
percentage of normally available space that is currently allocated to all files
on the file system. All sizes are scaled to a human readable format, for
example, \fB14K\fR, \fB234M\fR, \fB2.7G\fR, or \fB3.0T\fR. Scaling is done by
repetitively dividing by \fB1024\fR.
.sp
This option overrides the \fB-b\fR, \fB-e\fR, \fB-g\fR, \fB-k\fR, \fB-n\fR,
\fB-t\fR, and \fB-V\fR options. This option only works on mounted filesystems
and can not be used together with \fB-o\fR option.
.RE

.sp
.ne 2
.na
\fB\fB-k\fR\fR
.ad
.sp .6
.RS 4n
Prints the allocation in kbytes. The output consists of one line of information
for each specified file system. This information includes the file system name,
the total space allocated in the file system, the amount of space allocated to
existing files, the total amount of space available for the creation of new
files by unprivileged users, and the percentage of normally available space
that is currently allocated to all files on the file system. This option
overrides the \fB-b\fR, \fB-e\fR, \fB-n\fR, and \fB-t\fR options.
.RE

.sp
.ne 2
.na
\fB\fB-l\fR\fR
.ad
.sp .6
.RS 4n
Reports on local file systems only. This option is used only for mounted file
systems. It can not be used with the \fB-o\fR option.
.RE

.sp
.ne 2
.na
\fB\fB-n\fR\fR
.ad
.sp .6
.RS 4n
Prints only the \fIFSType\fR name. Invoked with no operands, this option prints
a list of mounted file system types. This option is used only for mounted file
systems. It can not be used with the \fB-o\fR option.
.RE

.sp
.ne 2
.na
\fB\fB-o\fR \fIFSType-specific_options\fR\fR
.ad
.sp .6
.RS 4n
Specifies \fIFSType-specific\fR options. These options are comma-separated,
with no intervening spaces. See the manual page for the \fIFSType-specific\fR
command for details.
.RE

.sp
.ne 2
.na
\fB\fB-t\fR\fR
.ad
.sp .6
.RS 4n
Prints full listings with totals. This option overrides the \fB-b\fR, \fB-e\fR,
and \fB-n\fR options.
.RE

.sp
.ne 2
.na
\fB\fB-V\fR\fR
.ad
.sp .6
.RS 4n
Echoes the complete set of file system specific command lines, but does not
execute them. The command line is generated by using the options and operands
provided by the user and adding to them information derived from
\fB/etc/mnttab\fR, \fB/etc/vfstab\fR, or \fB/etc/default/fs\fR. This option may
be used to verify and validate the command line.
.RE

.sp
.ne 2
.na
\fB\fB-Z\fR\fR
.ad
.sp .6
.RS 4n
Displays mounts in all visible zones. By default, \fBdf\fR only displays mounts
located within the current zone. This option has no effect in a non-global
zone.
.RE

.SS "/usr/bin/df"
.sp
.LP
The following option is supported for \fB/usr/bin/df\fR only:
.sp
.ne 2
.na
\fB\fB-v\fR\fR
.ad
.sp .6
.RS 4n
Like \fB-k\fR, except that sizes are displayed in multiples of the smallest
block size supported by each specified file system.
.sp
The output consists of one line of information for each file system. This one
line of information includes the following:
.RS +4
.TP
.ie t \(bu
.el o
the file system's mount point
.RE
.RS +4
.TP
.ie t \(bu
.el o
the file system's name
.RE
.RS +4
.TP
.ie t \(bu
.el o
the total number of blocks allocated to the file system
.RE
.RS +4
.TP
.ie t \(bu
.el o
the number of blocks allocated to existing files
.RE
.RS +4
.TP
.ie t \(bu
.el o
the number of blocks available for the creation of new files by unprivileged
users
.RE
.RS +4
.TP
.ie t \(bu
.el o
the percentage of blocks in use by files
.RE
.RE

.SS "/usr/xpg4/bin/df"
.sp
.LP
The following option is supported for \fB/usr/xpg4/bin/df\fR only:
.sp
.ne 2
.na
\fB\fB-P\fR\fR
.ad
.sp .6
.RS 4n
Same as \fB-h\fR except in 512-byte units.
.RE

.SH OPERANDS
.sp
.LP
The \fBdf\fR utility interprets operands according to the following precedence:
\fIblock_device\fR, \fIdirectory\fR, \fIfile\fR. The following operands are
supported:
.sp
.ne 2
.na
\fB\fIblock_device\fR\fR
.ad
.sp .6
.RS 4n
Represents a block special device (for example, \fB/dev/dsk/c1d0s7\fR).
.RE

.sp
.ne 2
.na
\fB\fIdirectory\fR\fR
.ad
.sp .6
.RS 4n
Represents a valid directory name. \fBdf\fR reports on the file system that
contains \fIdirectory\fR.
.RE

.sp
.ne 2
.na
\fB\fIfile\fR\fR
.ad
.sp .6
.RS 4n
Represents a valid file name. \fBdf\fR reports on the file system that contains
\fIfile\fR.
.RE

.sp
.ne 2
.na
\fB\fIresource\fR\fR
.ad
.sp .6
.RS 4n
Represents an \fBNFS\fR resource name.
.RE

.SH USAGE
.sp
.LP
See \fBlargefile\fR(5) for the description of the behavior of \fBdf\fR when
encountering files greater than or equal to 2 Gbyte ( 2^31 bytes).
.SH EXAMPLES
.LP
\fBExample 1 \fRExecuting the \fBdf\fR command
.sp
.LP
The following example shows the \fBdf\fR command and its output:

.sp
.in +2
.nf
example% \fB/usr/bin/df\fR

/                  (/dev/dsk/c0t0d0s0 ):  287530 blocks    92028 files
/system/contract   (ctfs              ):       0 blocks 2147483572 files
/system/object     (objfs             ):       0 blocks 2147483511 files
/usr               (/dev/dsk/c0t0d0s6 ): 1020214 blocks   268550 files
/proc              (/proc             ):       0 blocks      878 files
/dev/fd            (fd                ):       0 blocks        0 files
/etc/mnttab        (mnttab            ):       0 blocks        0 files
/var/run           (swap              ):  396016 blocks     9375 files
/tmp               (swap              ):  396016 blocks     9375 files
/opt               (/dev/dsk/c0t0d0s5 ):  381552 blocks    96649 files
/export/home       (/dev/dsk/c0t0d0s7 ):  434364 blocks   108220 files
.fi
.in -2
.sp

.sp
.LP
where the columns represent the mount point, device (or "filesystem", according
to \fBdf\fR \fB-k\fR), free blocks, and free files, respectively. For contract
file systems, \fB/system/contract\fR is the mount point, \fBctfs\fR is the
contract file system (used by \fBSMF\fR) with 0 free blocks and
2147483582(\fBINTMAX\fR-1) free files. For object file systems,
\fB/system/object\fR is the mount point, \fBobjfs\fR is the object file system
(see \fBobjfs\fR(7FS)) with 0 free blocks and 2147483511 free files.
.LP
\fBExample 2 \fRWriting Portable Information About the \fB/usr\fR File System
.sp
.LP
The following example writes portable information about the \fB/usr\fR file
system:

.sp
.in +2
.nf
example% \fB/usr/xpg4/bin/df -P /usr\fR
.fi
.in -2
.sp

.LP
\fBExample 3 \fRWriting Portable Information About the \fB/usr/src\fR file
System
.sp
.LP
Assuming that \fB/usr/src\fR is part of the \fB/usr\fR file system, the
following example writes portable information :

.sp
.in +2
.nf
example% \fB/usr/xpg4/bin/df -P /usr/src\fR
.fi
.in -2
.sp

.LP
\fBExample 4 \fRUsing \fBdf\fR to Display Inode Usage
.sp
.LP
The following example displays inode usage on all \fBufs\fR file systems:

.sp
.in +2
.nf
example%\fB/usr/bin/df -F ufs -o i\fR
.fi
.in -2
.sp

.SH ENVIRONMENT VARIABLES
.sp
.ne 2
.na
\fB\fBSYSV3\fR\fR
.ad
.sp .6
.RS 4n
This variable is used to override the default behavior of \fBdf\fR and provide
compatibility with INTERACTIVE UNIX System and \fBSCO\fR UNIX installation
scripts. As the \fBSYSV3\fR variable is provided for compatibility purposes
only, it should not be used in new scripts.
.RE

.sp
.LP
When set, any header which normally displays "files" will now display "nodes".
See \fBenviron\fR(5) for descriptions of the following environment variables
that affect the execution of \fBdf\fR: \fBLANG\fR, \fBLC_ALL\fR,
\fBLC_CTYPE\fR, \fBLC_MESSAGES\fR, and \fBNLSPATH\fR.
.SH EXIT STATUS
.sp
.LP
The following exit values are returned:
.sp
.ne 2
.na
\fB\fB0\fR\fR
.ad
.sp .6
.RS 4n
Successful completion.
.RE

.sp
.ne 2
.na
\fB\fB>0\fR\fR
.ad
.sp .6
.RS 4n
An error occurred.
.RE

.SH FILES
.sp
.ne 2
.na
\fB\fB/dev/dsk/*\fR\fR
.ad
.sp .6
.RS 4n
Disk devices
.RE

.sp
.ne 2
.na
\fB\fB/etc/default/fs\fR\fR
.ad
.sp .6
.RS 4n
Default local file system type. Default values can be set for the following
flags in \fB/etc/default/fs\fR. For example: \fBLOCAL=ufs\fR, where \fBLOCAL\fR
is the default partition for a command if no FSType is specified.
.RE

.sp
.ne 2
.na
\fB\fB/etc/mnttab\fR\fR
.ad
.sp .6
.RS 4n
Mount table
.RE

.sp
.ne 2
.na
\fB\fB/etc/vfstab\fR\fR
.ad
.sp .6
.RS 4n
List of default parameters for each file system
.RE

.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(5) for descriptions of the following attributes:
.SS "/usr/xpg4/bin/df"
.sp

.sp
.TS
box;
c | c
l | l .
ATTRIBUTE TYPE	ATTRIBUTE VALUE
_
Interface Stability	Standard
.TE

.SH SEE ALSO
.sp
.LP
\fBfind\fR(1), \fBdf_ufs\fR(1M), \fBmount\fR(1M), \fBstatvfs\fR(2),
\fBdefault_fs\fR(4), \fBmnttab\fR(4), \fBvfstab\fR(4), \fBattributes\fR(5),
\fBenviron\fR(5), \fBlargefile\fR(5), \fBstandards\fR(5), \fBobjfs\fR(7FS)
.SH NOTES
.sp
.LP
If \fBUFS\fR logging is enabled on a file system, the disk space used for the
log is reflected in the \fBdf\fR report. The log is allocated from free blocks
on the file system, and it is sized approximately \fB1\fR Mbyte per \fB1\fR
Gbyte of file system, up to 256 Mbytes. The log size may be larger  (up to a
maximum of 512 Mbytes) depending on the number of  cylinder groups present in
the file system.