[apple/libc.git] / gen / FreeBSD / getbsize.c

/*-
 * 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)
static char sccsid[] = "@(#)getbsize.c	8.1 (Berkeley) 6/4/93";
#endif /* LIBC_SCCS and not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/lib/libc/gen/getbsize.c,v 1.7 2002/12/30 19:04:06 obrien Exp $");

#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;
	const char *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 %ldG", MAXB / GB);
			n = max;
		}
		if ((blocksize = n * mul) < 512) {
underflow:		warnx("minimum blocksize is 512");
			form = "";
			blocksize = n = 512;
		}
	} else
		blocksize = n = 512;

	(void)snprintf(header, sizeof(header), "%ld%s-blocks", n, form);
	*headerlenp = strlen(header);
	*blocksizep = blocksize;
	return (header);
}
Commit	Line	Data
9385eb3d	1	/*-
e9ce8d39 A	2	* Copyright (c) 1991, 1993
	3	* The Regents of the University of California. All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
	13	* 3. All advertising materials mentioning features or use of this software
	14	* must display the following acknowledgement:
	15	* This product includes software developed by the University of
	16	* California, Berkeley and its contributors.
	17	* 4. Neither the name of the University nor the names of its contributors
	18	* may be used to endorse or promote products derived from this software
	19	* without specific prior written permission.
	20	*
	21	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	22	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	23	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	24	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	25	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	26	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	27	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	28	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	29	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	30	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	31	* SUCH DAMAGE.
	32	*/
	33
9385eb3d A	34	#if defined(LIBC_SCCS) && !defined(lint)
	35	static char sccsid[] = "@(#)getbsize.c 8.1 (Berkeley) 6/4/93";
	36	#endif /* LIBC_SCCS and not lint */
	37	#include <sys/cdefs.h>
	38	__FBSDID("$FreeBSD: src/lib/libc/gen/getbsize.c,v 1.7 2002/12/30 19:04:06 obrien Exp $");
e9ce8d39 A	39
	40	#include <err.h>
	41	#include <stdio.h>
	42	#include <stdlib.h>
	43	#include <string.h>
	44
	45	char *
	46	getbsize(headerlenp, blocksizep)
	47	int *headerlenp;
	48	long *blocksizep;
	49	{
	50	static char header[20];
	51	long n, max, mul, blocksize;
9385eb3d A	52	char ep, p;
9385eb3d A	53	const char *form;
e9ce8d39 A	54
	55	#define KB (1024L)
	56	#define MB (1024L * 1024L)
	57	#define GB (1024L * 1024L * 1024L)
	58	#define MAXB GB /* No tera, peta, nor exa. */
	59	form = "";
	60	if ((p = getenv("BLOCKSIZE")) != NULL && *p != '\0') {
	61	if ((n = strtol(p, &ep, 10)) < 0)
	62	goto underflow;
	63	if (n == 0)
	64	n = 1;
	65	if (*ep && ep[1])
	66	goto fmterr;
	67	switch (*ep) {
	68	case 'G': case 'g':
	69	form = "G";
	70	max = MAXB / GB;
	71	mul = GB;
	72	break;
	73	case 'K': case 'k':
	74	form = "K";
	75	max = MAXB / KB;
	76	mul = KB;
	77	break;
	78	case 'M': case 'm':
	79	form = "M";
	80	max = MAXB / MB;
	81	mul = MB;
	82	break;
	83	case '\0':
	84	max = MAXB;
	85	mul = 1;
	86	break;
	87	default:
	88	fmterr: warnx("%s: unknown blocksize", p);
	89	n = 512;
	90	mul = 1;
	91	break;
	92	}
	93	if (n > max) {
9385eb3d	94	warnx("maximum blocksize is %ldG", MAXB / GB);
e9ce8d39 A	95	n = max;
	96	}
	97	if ((blocksize = n * mul) < 512) {
	98	underflow: warnx("minimum blocksize is 512");
	99	form = "";
	100	blocksize = n = 512;
	101	}
	102	} else
	103	blocksize = n = 512;
	104
9385eb3d	105	(void)snprintf(header, sizeof(header), "%ld%s-blocks", n, form);
e9ce8d39 A	106	*headerlenp = strlen(header);
	107	*blocksizep = blocksize;
	108	return (header);
	109	}