getbsize man page on FreeBSD

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GETBSIZE(3)		 BSD Library Functions Manual		   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-terminated string
     describing the block size, something like “1K-blocks”.  The memory refer‐
     enced 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
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