PWB1/usr/man/man1/df.1

.th DF I 5/31/77
.sh NAME
df \*- report disk free space
.sh SYNOPSIS
.bd df
[\c
.bd \-uqs
] [\c
.bd \-t\c
number] [arg ...]
.sh DESCRIPTION
.it Df
prints the number of free blocks on a file system.
If no
.it args
are specified, the free counts of all the
mounted file systems are printed.
.sp
The
.bd \-u
flag prints the total block size, number of blocks
allocated for system information, number of free blocks, number of blocks
used and the number of free inodes.
.sp
The
.bd \-q
flag determines and prints the number of free blocks
on a file system by  extracting the free count directly
from the file system's superblock.
.sp
The
.bd \-s
flag is a silent option which prohibits  printing
of any results. Error messages and exit status are not effected.
.sp
The
.bd \-t
flag followed by a decimal 
.it number
(5 digit maximum)
is compared with the number of free blocks.
The result of the comparison returns the file system's major
and minor device numbers and a single character either
.bd Y
or
.bd N,
to indicate if the number of free blocks is
greater or less than the requested
.it number,
respectively (e.g., df \-t 1000 /u8
returns "0 12 Y").
An exit status of 0 is returned for
.bd Y
and 1 for
.bd N.
.sp
The
.it arg
can be specified as either the root name of the
.bd mounted
file system, e.g., "/u8" or the
name of the special file
corresponding to the particular device (must refer to a disk),
e.g., "/dev/rp14".
.sh FILES
/dev/rf?, /dev/rk?, /dev/rp?, /etc/mnttab
.sh "SEE ALSO"
icheck(VIII)