BSD 4_4_Lite2 release

[unix-history] / usr / src / bin / df / df.1

diff --git a/usr/src/bin/df/df.1 b/usr/src/bin/df/df.1
index a7dcbea..ab41e96 100644 (file)
--- a/usr/src/bin/df/df.1
+++ b/usr/src/bin/df/df.1
@@ -1,11 +1,37 @@
-.\" Copyright (c) 1989, 1990 The Regents of the University of California.
-.\" All rights reserved.
+.\" Copyright (c) 1989, 1990, 1993
+.\"    The Regents of the University of California.  All rights reserved.

 .\"
 .\"

-.\" %sccs.include.redist.man%
+.\" 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. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"    This product includes software developed by the University of
+.\"    California, Berkeley and its contributors.
+.\" 4. 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.

 .\"
 .\"

-.\"     @(#)df.1       6.7 (Berkeley) %G%
+.\" 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.

 .\"
 .\"

-.Dd 
+.\"     @(#)df.1       8.3 (Berkeley) 5/8/95
+.\"
+.Dd May 8, 1995

 .Dt DF 1
 .Os BSD 4
 .Sh NAME
 .Dt DF 1
 .Os BSD 4
 .Sh NAME


@@ -13,41 +39,76 @@
 .Nd display free disk space
 .Sh SYNOPSIS
 .Nm df
 .Nd display free disk space
 .Sh SYNOPSIS
 .Nm df

-.Op Fl ikn
-.Op Ar file Li \&| Ar filesystem \&...
+.Op Fl in
+.Op Fl t Ar type
+.Op Ar file | Ar filesystem ...

 .Sh DESCRIPTION
 .Nm Df
 .Sh DESCRIPTION
 .Nm Df

-displays statistics about the amount of free disk space on the
-filesystem
+displays statistics about the amount of free disk space on the specified

 .Ar filesystem
 or on the filesystem of which
 .Ar file
 is a part.
 .Ar filesystem
 or on the filesystem of which
 .Ar file
 is a part.

-If neither a file or a filesystem argument is given,
-statistics for every filesystem mounted is displayed.
+Values are displayed in 512-byte per block block counts.
+If neither a file or a filesystem operand is specified,
+statistics for all mounted filesystems are displayed
+(subject to the
+.Fl t
+option below).

 .Pp
 The following options are available:
 .Pp
 The following options are available:

-.Tw Ds
-.Tp Fl i
+.Bl -tag -width Ds
+.It Fl i

 Include statistics on the number of free inodes.
 Include statistics on the number of free inodes.

-.Tp Fl k
-By default, all reported numbers are in 512-byte blocks.
-This causes the numbers to be reported in kilobytes.
-.Tp Fl n
+.It Fl n

 Print out the previously obtained statistics from the filesystems.
 Print out the previously obtained statistics from the filesystems.

-This option should be used
-if it is possible that one or more filesystems are
-in a state such that they will not be able
-to provide statistics without a long delay.
+This option should be used if it is possible that one or more
+filesystems are in a state such that they will not be able to provide
+statistics without a long delay.

 When this option is specified,
 .Nm df
 When this option is specified,
 .Nm df

-will not request new statistics from the filesystems,
-but will respond with the possibly stale statistics
-that were previously obtained.
+will not request new statistics from the filesystems, but will respond
+with the possibly stale statistics that were previously obtained.
+.It Fl t
+Only print out statistics for filesystems of the specified types.
+More than one type may be specified in a comma separated list.
+The list of filesystem types can be prefixed with
+.Dq no
+to specify the filesystem types for which action should
+.Em not
+be taken.
+For example, the
+.Nm df
+command:
+.Bd -literal -offset indent
+df -t nonfs,mfs
+.Ed
+.Pp
+lists all filesystems except those of type
+.Tn NFS
+and
+.Tn MFS .
+The
+.Xr sysctl 8
+command can be used to find out the types of filesystems
+that are available on the system:
+.Bd -literal -offset indent
+sysctl vfs
+.Ed
+.El
+.Sh ENVIRONMENTAL VARIABLES
+.Bl -tag -width BLOCKSIZE
+.It Ev BLOCKSIZE
+If the environmental variable
+.Ev BLOCKSIZE
+is set, the block counts will be displayed in units of that size block.
+.El

 .Sh BUGS
 The
 .Fl n
 .Sh BUGS
 The
 .Fl n

-flag is ignored if a file or filesystem is specified.
+and
+.Fl t
+flags are ignored if a file or filesystem is specified.

 .Sh SEE ALSO
 .Xr quota 1 ,
 .Xr statfs 2 ,
 .Sh SEE ALSO
 .Xr quota 1 ,
 .Xr statfs 2 ,


@@ -56,11 +117,10 @@ flag is ignored if a file or filesystem is specified.
 .Xr getmntinfo 3 ,
 .Xr fstab 5 ,
 .Xr mount 8 ,
 .Xr getmntinfo 3 ,
 .Xr fstab 5 ,
 .Xr mount 8 ,

-.Xr quot 8
+.Xr quot 8 ,
+.Xr sysctl 8

 .Sh HISTORY
 A
 .Nm df
 .Sh HISTORY
 A
 .Nm df

-command appeared in Version 6 AT&T Unix as
-df(8) and in Version 7 AT&T Unix as df(1m).
-.\" Just for posterity and perspective, the date on the Version 6
-.\" release manual page was 1/20/73.
+command appeared in
+.At v6 .