diff options
Diffstat (limited to 'lib/libc/gen/getbsize.c')
| -rw-r--r-- | lib/libc/gen/getbsize.c | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/lib/libc/gen/getbsize.c b/lib/libc/gen/getbsize.c new file mode 100644 index 0000000..fc7b123 --- /dev/null +++ b/lib/libc/gen/getbsize.c @@ -0,0 +1,106 @@ +/*- + * 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. + */ + +#ifndef lint +static char sccsid[] = "@(#)getbsize.c 8.1 (Berkeley) 6/4/93"; +#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("minimum blocksize is 512"); + form = ""; + blocksize = n = 512; + } + } else + blocksize = n = 512; + + (void)snprintf(header, sizeof(header), "%d%s-blocks", n, form); + *headerlenp = strlen(header); + *blocksizep = blocksize; + return (header); +} |
