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| GETBSIZE(3) | FreeBSD Library Functions Manual | GETBSIZE(3) |
NAME
getbsize —
LIBRARY
Standard C Library (libc, -lc)SYNOPSIS
#include <stdlib.h>
char *
getbsize(int
*headerlenp, long
*blocksizep);
DESCRIPTION
Thegetbsize() function returns a preferred block size
for reporting by system utilities
df(1),
du(1) and
ls(1), based
on the value of the BLOCKSIZE environment variable.
BLOCKSIZE may be specified directly in bytes, or in
multiples of a kilobyte by specifying a number followed by ``K'' or ``k'', in
multiples of a megabyte by specifying a number followed by ``M'' or ``m'' or
in multiples of a gigabyte by specifying a number followed by ``G'' or ``g''.
Multiples must be integers.
Valid values of BLOCKSIZE are 512 bytes to
1 gigabyte. Sizes less than 512 bytes are rounded up to 512 bytes, and sizes
greater than 1 GB are rounded down to 1 GB. In each case
getbsize() produces a warning message via
warnx(3).
The getbsize() function returns a pointer
to a null-terminated 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.
SEE ALSO
df(1), du(1), ls(1), systat(1), environ(7)HISTORY
Thegetbsize() function first appeared in
4.4BSD.
| June 11, 2017 | FreeBSD 13.1-RELEASE |
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