GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libc/gen/getbsize.c Lines: 0 24 0.0 %
Date: 2017-11-13 Branches: 0 28 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: getbsize.c,v 1.11 2015/08/31 02:53:57 guenther Exp $ */
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/*-
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 * Copyright (c) 1991, 1993
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 *	The Regents of the University of California.  All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. Neither the name of the University nor the names of its contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 */
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#include <err.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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char *
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getbsize(int *headerlenp, long *blocksizep)
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{
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	static char header[20];
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	long n, max, mul, blocksize;
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	char *ep, *p, *form;
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#define	KB	(1024)
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#define	MB	(1024 * 1024)
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#define	GB	(1024 * 1024 * 1024)
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#define	MAXB	GB		/* No tera, peta, nor exa. */
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	form = "";
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	if ((p = getenv("BLOCKSIZE")) != NULL && *p != '\0') {
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		if ((n = strtol(p, &ep, 10)) < 0)
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			goto underflow;
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		if (n == 0)
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			n = 1;
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		if (*ep && ep[1])
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			goto fmterr;
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		switch (*ep) {
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		case 'G': case 'g':
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			form = "G";
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			max = MAXB / GB;
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			mul = GB;
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			break;
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		case 'K': case 'k':
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			form = "K";
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			max = MAXB / KB;
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			mul = KB;
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			break;
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		case 'M': case 'm':
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			form = "M";
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			max = MAXB / MB;
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			mul = MB;
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			break;
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		case '\0':
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			max = MAXB;
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			mul = 1;
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			break;
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		default:
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fmterr:			warnx("%s: unknown blocksize", p);
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			n = 512;
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			max = MAXB;
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			mul = 1;
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			break;
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		}
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		if (n > max) {
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			warnx("maximum blocksize is %dG", MAXB / GB);
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			n = max;
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		}
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		if ((blocksize = n * mul) < 512) {
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underflow:		warnx("%s: minimum blocksize is 512", p);
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			form = "";
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			blocksize = n = 512;
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		}
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	} else
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		blocksize = n = 512;
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	*headerlenp = snprintf(header, sizeof(header), "%ld%s-blocks", n, form);
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	if (*headerlenp < 0)
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		*headerlenp = 0;
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	else if (*headerlenp >= sizeof(header))
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		*headerlenp = sizeof(header) - 1;
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	*blocksizep = blocksize;
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	return (header);
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}