1994-05-27 05:00:24 +00:00
|
|
|
.\" Copyright (c) 1993
|
|
|
|
|
.\" The Regents of the University of California. All rights reserved.
|
|
|
|
|
.\"
|
|
|
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
|
|
|
.\" modification, are permitted provided that the following conditions
|
|
|
|
|
.\" are met:
|
|
|
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
|
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
|
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
|
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
|
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
|
|
|
.\" 4. Neither the name of the University nor the names of its contributors
|
|
|
|
|
.\" may be used to endorse or promote products derived from this software
|
|
|
|
|
.\" without specific prior written permission.
|
|
|
|
|
.\"
|
|
|
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
|
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
|
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
|
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
|
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
|
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
|
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
|
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
|
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
|
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
|
|
|
.\" SUCH DAMAGE.
|
|
|
|
|
.\"
|
|
|
|
|
.\" @(#)getbsize.3 8.1 (Berkeley) 6/4/93
|
1999-08-28 00:22:10 +00:00
|
|
|
.\" $FreeBSD$
|
1994-05-27 05:00:24 +00:00
|
|
|
.\"
|
|
|
|
|
.Dd June 4, 1993
|
|
|
|
|
.Dt GETBSIZE 3
|
2001-07-10 13:41:46 +00:00
|
|
|
.Os
|
1994-05-27 05:00:24 +00:00
|
|
|
.Sh NAME
|
|
|
|
|
.Nm getbsize
|
|
|
|
|
.Nd get user block size
|
2000-04-21 09:42:15 +00:00
|
|
|
.Sh LIBRARY
|
|
|
|
|
.Lb libc
|
1994-05-27 05:00:24 +00:00
|
|
|
.Sh SYNOPSIS
|
2001-10-01 16:09:29 +00:00
|
|
|
.In stdlib.h
|
1994-05-27 05:00:24 +00:00
|
|
|
.Ft char *
|
2002-12-30 11:12:16 +00:00
|
|
|
.Fn getbsize "int *headerlenp" "long *blocksizep"
|
1994-05-27 05:00:24 +00:00
|
|
|
.Sh DESCRIPTION
|
|
|
|
|
The
|
1996-08-22 22:05:59 +00:00
|
|
|
.Fn getbsize
|
1994-05-27 05:00:24 +00:00
|
|
|
function determines the user's preferred block size based on the value of the
|
|
|
|
|
.Dq BLOCKSIZE
|
|
|
|
|
environment variable; see
|
|
|
|
|
.Xr environ 7
|
|
|
|
|
for details on its use and format.
|
|
|
|
|
.Pp
|
|
|
|
|
The
|
1996-08-22 22:05:59 +00:00
|
|
|
.Fn getbsize
|
1994-05-27 05:00:24 +00:00
|
|
|
function returns a pointer to a null-terminated string describing
|
|
|
|
|
the block size, something like
|
|
|
|
|
.Dq 1K-blocks .
|
|
|
|
|
The memory referenced by
|
|
|
|
|
.Fa headerlenp
|
|
|
|
|
is filled in with the length of the string (not including the
|
|
|
|
|
terminating null).
|
|
|
|
|
The memory referenced by
|
|
|
|
|
.Fa blocksizep
|
|
|
|
|
is filled in with block size, in bytes.
|
|
|
|
|
.Pp
|
|
|
|
|
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.
|
|
|
|
|
.Sh SEE ALSO
|
|
|
|
|
.Xr df 1 ,
|
|
|
|
|
.Xr du 1 ,
|
|
|
|
|
.Xr ls 1 ,
|
|
|
|
|
.Xr systat 1 ,
|
|
|
|
|
.Xr environ 7
|
|
|
|
|
.Sh HISTORY
|
|
|
|
|
The
|
1996-08-22 22:05:59 +00:00
|
|
|
.Fn getbsize
|
1996-05-23 01:05:25 +00:00
|
|
|
function first appeared in
|
1994-05-27 05:00:24 +00:00
|
|
|
.Bx 4.4 .
|
