GETBSIZE(3) BSD Programmer's Manual GETBSIZE(3)
getbsize - get user block size
getbsize(int *headerlenp, long *blocksizep);
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
df(1), du(1), ls(1), systat(1), environ(7)
The getbsize function call appeared in 4.4BSD.
4.4BSD June 4, 1993 1