The
getbsize()
function returns a preferred block size for reporting by system utilities
df(1),
du(1)
and
ls(1),
based on the value of the
BLOCKSIZE
environment variable.
BLOCKSIZE
may be specified directly in bytes, or in multiples of a kilobyte by
specifying a number followed by ``K'' or ``k'', in multiples of a
megabyte by specifying a number followed by ``M'' or ``m'' or in
multiples of a gigabyte by specifying a number followed by ``G'' or
``g''.
Multiples must be integers.
Valid values of
BLOCKSIZE
are 512 bytes to 1 gigabyte.
Sizes less than 512 bytes are rounded up to 512 bytes, and sizes
greater than 1 GB are rounded down to 1 GB.
In each case
getbsize()
produces a warning message via
warnx(3).
The
getbsize()
function returns a pointer to a null-terminated string describing
the block size, something like
"1K-blocks".
The memory referenced by
headerlenp
is filled in with the length of the string (not including the
terminating null).
The memory referenced by
blocksizep
is filled in with block size, in bytes.
