NAME
bdf — report number of free disk blocks (Berkeley version)
SYNOPSIS
/usr/bin/bdf
[-b]
[-i]
[-l]
[-s]
[-t
type
|
[filesystem|file]
... ]
DESCRIPTION
The
bdf
command displays the amount of free disk space available either
on the specified
filesystem
(/dev/dsk/c0d0s0,
for example) or on the file system in which the specified
file
(such as
$HOME),
is contained.
If no file system is specified,
the free space on all of the normally mounted file systems is printed.
The reported numbers are in kilobytes.
Options
The
bdf
command recognizes the following options:
- -b
Display information regarding file system swapping.
- -i
Report the number of used and free inodes.
- -l
Display information for local file systems only (for example,
HFS and CDFS file systems).
- -s
Do not sync the file system data on the disk before reporting the usage.
Note that the data reported by
bdf
may not be up to date.
- -t type
Report on the file systems of a given
type
(for example,
nfs
or
hfs).
RETURN VALUE
The
bdf
command returns 0 on success (able to get status on all file systems),
or returns 1 on failure (unable to get status on one or more file systems).
WARNINGS
If file system names are too long,
the output for a given entry is displayed on two lines.
The
bdf
command does not account for any disk space
reserved for swap space, or used for the HFS
boot block (8 KB, 1 per file system), HFS
superblocks (8 KB each, 1 per disk cylinder), HFS
cylinder group blocks (1 KB - 8 KB each, 1 per cylinder group),
and inodes (currently 128 bytes reserved for each inode).
Non-HFS
file systems may have other items not accounted for by this command.
AUTHOR
bdf
was developed by the University of California, Berkeley.
FILES
- /etc/fstab
Static information about the file systems.
- /etc/mnttab
Mounted file system table.
- /dev/dsk/*
File system devices.
Printable version
