112 lines
3.4 KiB
C
112 lines
3.4 KiB
C
/* $NetBSD: getbsize.c,v 1.7 1995/06/16 07:12:41 jtc Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1991, 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.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 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.
|
|
*/
|
|
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
|
#if 0
|
|
static char sccsid[] = "@(#)getbsize.c 8.1 (Berkeley) 6/4/93";
|
|
#else
|
|
static char rcsid[] = "$NetBSD: getbsize.c,v 1.7 1995/06/16 07:12:41 jtc Exp $";
|
|
#endif
|
|
#endif /* not lint */
|
|
|
|
#include <err.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
char *
|
|
getbsize(headerlenp, blocksizep)
|
|
int *headerlenp;
|
|
long *blocksizep;
|
|
{
|
|
static char header[20];
|
|
long n, max, mul, blocksize;
|
|
char *ep, *p, *form;
|
|
|
|
#define KB (1024L)
|
|
#define MB (1024L * 1024L)
|
|
#define GB (1024L * 1024L * 1024L)
|
|
#define MAXB GB /* No tera, peta, nor exa. */
|
|
form = "";
|
|
if ((p = getenv("BLOCKSIZE")) != NULL && *p != '\0') {
|
|
if ((n = strtol(p, &ep, 10)) < 0)
|
|
goto underflow;
|
|
if (n == 0)
|
|
n = 1;
|
|
if (*ep && ep[1])
|
|
goto fmterr;
|
|
switch (*ep) {
|
|
case 'G': case 'g':
|
|
form = "G";
|
|
max = MAXB / GB;
|
|
mul = GB;
|
|
break;
|
|
case 'K': case 'k':
|
|
form = "K";
|
|
max = MAXB / KB;
|
|
mul = KB;
|
|
break;
|
|
case 'M': case 'm':
|
|
form = "M";
|
|
max = MAXB / MB;
|
|
mul = MB;
|
|
break;
|
|
case '\0':
|
|
max = MAXB;
|
|
mul = 1;
|
|
break;
|
|
default:
|
|
fmterr: _warnx("%s: unknown blocksize", p);
|
|
n = 512;
|
|
mul = 1;
|
|
break;
|
|
}
|
|
if (n > max) {
|
|
_warnx("maximum blocksize is %dG", MAXB / GB);
|
|
n = max;
|
|
}
|
|
if ((blocksize = n * mul) < 512) {
|
|
underflow: _warnx("%s: minimum blocksize is 512");
|
|
form = "";
|
|
blocksize = n = 512;
|
|
}
|
|
} else
|
|
blocksize = n = 512;
|
|
|
|
*headerlenp = snprintf(header, sizeof(header), "%d%s-blocks", n, form);
|
|
*blocksizep = blocksize;
|
|
return (header);
|
|
}
|