GETBSIZE(3) MachTen Programmer’s Manual GETBSIZE(3)

NAME
getbsize - get user block size

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-terminated string de-
scribing the block size, something like ‘‘1K-blocks’’. The memory refer-
enced by headerlenp is filled in with the length of the string (not in-
cluding 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 call appeared in 4.4BSD.

4.4BSD June 4, 1993 1