getbsize(3)

NAME

getbsize - get user block size

LIBRARY

Standard C Library (libc, -lc)

SYNOPSIS

#include <stdlib.h>
char *
getbsize(int *headerlenp, long *blocksizep);

DESCRIPTION

The getbsize() function determines the user's preferred

block size based
on the value of the ``BLOCKSIZE'' environment variable; see

environ(7)
for details on its use and format.

The getbsize() function returns a pointer to a null-termi

nated 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.

If the user's block size is unreasonable, a warning message

is written to
standard error and the returned information reflects a block

size of 512
bytes.

SEE ALSO

df(1), du(1), ls(1), systat(1), environ(7)

HISTORY

The getbsize() function first appeared in 4.4BSD.

BSD June 4, 1993

BSD