514 lines
14 KiB
C
514 lines
14 KiB
C
/*
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* Copyright (c) 1983, 1988, 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 <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT("@(#) Copyright (c) 1983, 1988, 1993\
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The Regents of the University of California. All rights reserved.");
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "from: @(#)diskpart.c 8.3 (Berkeley) 11/30/94";
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#else
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__RCSID("$NetBSD: diskpart.c,v 1.19 2011/08/30 10:12:06 joerg Exp $");
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#endif
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#endif /* not lint */
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/*
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* Program to calculate standard disk partition sizes.
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*/
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#include <sys/param.h>
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#define DKTYPENAMES
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#include <sys/disklabel.h>
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#include <ctype.h>
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#include <disktab.h>
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#include <limits.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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#include <unistd.h>
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#define for_now /* show all of `c' partition for disklabel */
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#define NPARTITIONS 8
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#define PART(x) (x - 'a')
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/*
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* Default partition sizes, where they exist.
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*/
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#define NDEFAULTS 4
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static int defpart[NDEFAULTS][NPARTITIONS] = {
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{ 15884, 66880, 0, 15884, 307200, 0, 0, 291346 }, /* ~ 356+ Mbytes */
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{ 15884, 33440, 0, 15884, 55936, 0, 0, 291346 }, /* ~ 206-355 Mbytes */
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{ 15884, 33440, 0, 15884, 55936, 0, 0, 0 }, /* ~ 61-205 Mbytes */
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{ 15884, 10032, 0, 15884, 0, 0, 0, 0 }, /* ~ 20-60 Mbytes */
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};
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/*
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* Each array defines a layout for a disk;
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* that is, the collection of partitions totally
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* covers the physical space on a disk.
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*/
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#define NLAYOUTS 3
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static char layouts[NLAYOUTS][NPARTITIONS] = {
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{ 'a', 'b', 'h', 'g' },
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{ 'a', 'b', 'h', 'd', 'e', 'f' },
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{ 'c' },
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};
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/*
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* Default disk block and disk block fragment
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* sizes for each file system. Those file systems
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* with zero block and frag sizes are special cases
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* (e.g. swap areas or for access to the entire device).
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*/
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static struct partition defparam[NPARTITIONS] = {
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{ 0, 0, { 1024 }, FS_UNUSED, 8, { 0 }, }, /* a */
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{ 0, 0, { 1024 }, FS_SWAP, 8, { 0 }, }, /* b */
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{ 0, 0, { 1024 }, FS_UNUSED, 8, { 0 }, }, /* c */
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{ 0, 0, { 512 }, FS_UNUSED, 8, { 0 }, }, /* d */
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{ 0, 0, { 1024 }, FS_UNUSED, 8, { 0 }, }, /* e */
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{ 0, 0, { 1024 }, FS_UNUSED, 8, { 0 }, }, /* f */
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{ 0, 0, { 1024 }, FS_UNUSED, 8, { 0 }, }, /* g */
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{ 0, 0, { 1024 }, FS_UNUSED, 8, { 0 }, } /* h */
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};
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/*
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* Each disk has some space reserved for a bad sector
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* forwarding table. DEC standard 144 uses the first
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* 5 even numbered sectors in the last track of the
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* last cylinder for replicated storage of the bad sector
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* table; another 126 sectors past this is needed as a
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* pool of replacement sectors.
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*/
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static int badsecttable = 126; /* # sectors */
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static int pflag; /* print device driver partition tables */
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static int dflag; /* print disktab entry */
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static int gettype(const char *, const char *const *);
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static struct disklabel *promptfordisk(const char *);
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__dead static void usage(void);
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int
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main(int argc, char *argv[])
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{
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struct disklabel *dp;
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int spc, def, part, layout, j, ch;
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uint32_t curcyl;
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int threshhold, numcyls[NPARTITIONS], startcyl[NPARTITIONS];
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off_t totsize = 0;
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const char *tyname;
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char *lp;
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while ((ch = getopt(argc, argv, "pds:")) != -1) {
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switch (ch) {
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case 'd':
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dflag++;
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break;
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case 'p':
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pflag++;
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break;
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case 's':
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totsize = strtoul(optarg, &lp, 10);
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if (*lp != '\0')
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usage();
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break;
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case '?':
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default:
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usage();
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/* NOTREACHED */
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}
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}
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argc -= optind;
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argv += optind;
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if (argc != 1) {
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usage();
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/* NOTREACHED */
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}
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dp = getdiskbyname(*argv);
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if (dp == NULL) {
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if (isatty(0))
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dp = promptfordisk(*argv);
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if (dp == NULL) {
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fprintf(stderr, "%s: unknown disk type\n", *argv);
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exit(1);
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}
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}
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if (dp->d_flags & D_REMOVABLE)
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tyname = "removable";
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else if (dp->d_flags & D_RAMDISK)
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tyname = "simulated";
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else
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tyname = "winchester";
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spc = dp->d_secpercyl;
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/*
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* Bad sector table contains one track for the replicated
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* copies of the table and enough full tracks preceding
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* the last track to hold the pool of free blocks to which
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* bad sectors are mapped.
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* If disk size was specified explicitly, use specified size.
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*/
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if (dp->d_type == DTYPE_SMD && dp->d_flags & D_BADSECT &&
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totsize == 0) {
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badsecttable = dp->d_nsectors +
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roundup(badsecttable, dp->d_nsectors);
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threshhold = howmany(spc, badsecttable);
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} else {
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badsecttable = 0;
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threshhold = 0;
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}
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/*
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* If disk size was specified, recompute number of cylinders
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* that may be used, and set badsecttable to any remaining
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* fraction of the last cylinder.
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*/
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if (totsize != 0) {
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dp->d_ncylinders = howmany(totsize, spc);
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badsecttable = spc * dp->d_ncylinders - totsize;
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}
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/*
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* Figure out if disk is large enough for
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* expanded swap area and 'd', 'e', and 'f'
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* partitions. Otherwise, use smaller defaults
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* based on RK07.
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*/
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for (def = 0; def < NDEFAULTS; def++) {
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curcyl = 0;
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for (part = PART('a'); part < NPARTITIONS; part++)
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curcyl += howmany(defpart[def][part], spc);
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if (curcyl < dp->d_ncylinders - threshhold)
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break;
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}
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if (def >= NDEFAULTS) {
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fprintf(stderr, "%s: disk too small, calculate by hand\n",
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*argv);
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exit(1);
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}
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/*
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* Calculate number of cylinders allocated to each disk
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* partition. We may waste a bit of space here, but it's
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* in the interest of (very backward) compatibility
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* (for mixed disk systems).
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*/
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for (curcyl = 0, part = PART('a'); part < NPARTITIONS; part++) {
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numcyls[part] = 0;
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if (defpart[def][part] != 0) {
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numcyls[part] = howmany(defpart[def][part], spc);
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curcyl += numcyls[part];
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}
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}
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numcyls[PART('f')] = dp->d_ncylinders - curcyl;
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numcyls[PART('g')] =
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numcyls[PART('d')] + numcyls[PART('e')] + numcyls[PART('f')];
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numcyls[PART('c')] = dp->d_ncylinders;
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defpart[def][PART('f')] = numcyls[PART('f')] * spc - badsecttable;
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defpart[def][PART('g')] = numcyls[PART('g')] * spc - badsecttable;
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defpart[def][PART('c')] = numcyls[PART('c')] * spc;
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#ifndef for_now
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if (totsize || !pflag)
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#else
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if (totsize)
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#endif
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defpart[def][PART('c')] -= badsecttable;
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/*
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* Calculate starting cylinder number for each partition.
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* Note the 'h' partition is physically located before the
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* 'g' or 'd' partition. This is reflected in the layout
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* arrays defined above.
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*/
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for (layout = 0; layout < NLAYOUTS; layout++) {
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curcyl = 0;
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for (lp = layouts[layout]; *lp != 0; lp++) {
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startcyl[PART(*lp)] = curcyl;
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curcyl += numcyls[PART(*lp)];
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}
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}
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if (pflag) {
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printf("}, %s_sizes[%d] = {\n", dp->d_typename, NPARTITIONS);
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for (part = PART('a'); part < NPARTITIONS; part++) {
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if (numcyls[part] == 0) {
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printf("\t0,\t0,\n");
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continue;
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}
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if (dp->d_type != DTYPE_MSCP) {
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printf("\t%d,\t%d,\t\t/* %c=cyl %d thru %d */\n",
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defpart[def][part], startcyl[part],
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'A' + part, startcyl[part],
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startcyl[part] + numcyls[part] - 1);
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continue;
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}
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printf("\t%d,\t%d,\t\t/* %c=sectors %d thru %d */\n",
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defpart[def][part], spc * startcyl[part],
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'A' + part, spc * startcyl[part],
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spc * startcyl[part] + defpart[def][part] - 1);
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}
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exit(0);
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}
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if (dflag) {
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int nparts;
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/*
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* In case the disk is in the ``in-between'' range
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* where the 'g' partition is smaller than the 'h'
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* partition, reverse the frag sizes so the /usr partition
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* is always set up with a frag size larger than the
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* user's partition.
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*/
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if (defpart[def][PART('g')] < defpart[def][PART('h')]) {
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int temp;
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temp = defparam[PART('h')].p_fsize;
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defparam[PART('h')].p_fsize =
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defparam[PART('g')].p_fsize;
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defparam[PART('g')].p_fsize = temp;
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}
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printf("%s:\\\n", dp->d_typename);
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printf("\t:ty=%s:ns#%d:nt#%d:nc#%d:", tyname,
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dp->d_nsectors, dp->d_ntracks, dp->d_ncylinders);
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if (dp->d_secpercyl != dp->d_nsectors * dp->d_ntracks)
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printf("sc#%d:", dp->d_secpercyl);
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if (dp->d_type == DTYPE_SMD && dp->d_flags & D_BADSECT)
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printf("sf:");
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printf("\\\n\t:dt=%s:", dktypenames[dp->d_type]);
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for (part = NDDATA - 1; part >= 0; part--)
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if (dp->d_drivedata[part])
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break;
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for (j = 0; j <= part; j++)
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printf("d%d#%d:", j, dp->d_drivedata[j]);
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printf("\\\n");
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for (nparts = 0, part = PART('a'); part < NPARTITIONS; part++)
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if (defpart[def][part] != 0)
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nparts++;
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for (part = PART('a'); part < NPARTITIONS; part++) {
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if (defpart[def][part] == 0)
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continue;
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printf("\t:p%c#%d:", 'a' + part, defpart[def][part]);
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printf("o%c#%d:b%c#%d:f%c#%d:",
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'a' + part, spc * startcyl[part],
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'a' + part,
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defparam[part].p_frag * defparam[part].p_fsize,
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'a' + part, defparam[part].p_fsize);
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if (defparam[part].p_fstype == FS_SWAP)
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printf("t%c=swap:", 'a' + part);
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nparts--;
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printf("%s\n", nparts > 0 ? "\\" : "");
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}
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#ifdef for_now
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defpart[def][PART('c')] -= badsecttable;
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part = PART('c');
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printf("#\t:p%c#%d:", 'a' + part, defpart[def][part]);
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printf("o%c#%d:b%c#%d:f%c#%d:\n",
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'a' + part, spc * startcyl[part],
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'a' + part,
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defparam[part].p_frag * defparam[part].p_fsize,
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'a' + part, defparam[part].p_fsize);
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#endif
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exit(0);
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}
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printf("%s: #sectors/track=%d, #tracks/cylinder=%d #cylinders=%d\n",
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dp->d_typename, dp->d_nsectors, dp->d_ntracks,
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dp->d_ncylinders);
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printf("\n Partition\t Size\t Offset\t Range\n");
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for (part = PART('a'); part < NPARTITIONS; part++) {
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printf("\t%c\t", 'a' + part);
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if (numcyls[part] == 0) {
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printf(" unused\n");
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continue;
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}
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printf("%7d\t%7d\t%4d - %d%s\n",
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defpart[def][part], startcyl[part] * spc,
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startcyl[part], startcyl[part] + numcyls[part] - 1,
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defpart[def][part] % spc ? "*" : "");
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}
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exit(0);
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}
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static struct disklabel disk;
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static struct field {
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const char *f_name;
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const char *f_defaults;
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u_int32_t *f_location;
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} fields[] = {
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{ "sector size", "512", &disk.d_secsize },
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{ "#sectors/track", NULL, &disk.d_nsectors },
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{ "#tracks/cylinder", NULL, &disk.d_ntracks },
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{ "#cylinders", NULL, &disk.d_ncylinders },
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{ NULL, NULL, 0 },
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};
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static struct disklabel *
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promptfordisk(const char *name)
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{
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struct disklabel *dp = &disk;
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struct field *fp;
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int i;
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const char *const *tp;
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char buf[BUFSIZ], *cp;
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strncpy(dp->d_typename, name, sizeof(dp->d_typename));
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fprintf(stderr,
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"%s: unknown disk type, want to supply parameters (y/n)? ",
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name);
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if ((fgets(buf, BUFSIZ, stdin) == NULL) || buf[0] != 'y')
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return ((struct disklabel *)0);
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for (;;) {
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fprintf(stderr, "Disk/controller type (%s)? ", dktypenames[1]);
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if (fgets(buf, BUFSIZ, stdin) == NULL)
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return ((struct disklabel *)0);
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if ((cp = strchr(buf, '\n')) != NULL)
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*cp = '\0';
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if (buf[0] == '\0') {
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dp->d_type = 1;
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break;
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}
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if ((i = gettype(buf, dktypenames)) >= 0) {
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dp->d_type = i;
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break;
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}
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fprintf(stderr, "%s: unrecognized controller type\n", buf);
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fprintf(stderr, "use one of:\n");
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for (tp = dktypenames; *tp; tp++)
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if (strchr(*tp, ' ') == 0)
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fprintf(stderr, "\t%s\n", *tp);
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}
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gettype:
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dp->d_flags = 0;
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fprintf(stderr, "type (winchester|removable|simulated)? ");
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if (fgets(buf, BUFSIZ, stdin) == NULL)
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return ((struct disklabel *)0);
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if ((cp = strchr(buf, '\n')) != NULL)
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*cp = '\0';
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if (buf[0] == '\0')
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goto gettype;
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switch (buf[0]) {
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case 'r':
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dp->d_flags = D_REMOVABLE;
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break;
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case 's':
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dp->d_flags = D_RAMDISK;
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break;
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case 'w':
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break;
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default:
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fprintf(stderr, "%s: bad disk type\n", buf);
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/* FALLTHROUGH */
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case '\0':
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goto gettype;
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}
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fprintf(stderr, "(type <cr> to get default value, if only one)\n");
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if (dp->d_type == DTYPE_SMD) {
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fprintf(stderr,
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"Do '%s' disks support bad144 bad block forwarding (yes)? ",
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dp->d_typename);
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if (fgets(buf, BUFSIZ, stdin) == NULL)
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return ((struct disklabel *)0);
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if (buf[0] != 'n')
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dp->d_flags |= D_BADSECT;
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}
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for (fp = fields; fp->f_name != NULL; fp++) {
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again:
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fprintf(stderr, "%s ", fp->f_name);
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if (fp->f_defaults != NULL)
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fprintf(stderr, "(%s)", fp->f_defaults);
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fprintf(stderr, "? ");
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if (fgets(buf, BUFSIZ, stdin) == NULL)
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return ((struct disklabel *)0);
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if ((cp = strchr(buf, '\n')) != NULL)
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*cp = '\0';
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cp = buf;
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if (*cp == '\0') {
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if (fp->f_defaults == NULL) {
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fprintf(stderr, "no default value\n");
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goto again;
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}
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/* XXX __UNCONST */
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cp = __UNCONST(fp->f_defaults);
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}
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*fp->f_location = atol(cp);
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if (*fp->f_location == 0) {
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fprintf(stderr, "%s: bad value\n", cp);
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goto again;
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}
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}
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fprintf(stderr, "sectors/cylinder (%d)? ",
|
|
dp->d_nsectors * dp->d_ntracks);
|
|
if (fgets(buf, BUFSIZ, stdin) == NULL)
|
|
return ((struct disklabel *)0);
|
|
if ((cp = strchr(buf, '\n')) != NULL)
|
|
*cp = '\0';
|
|
if (buf[0] == 0)
|
|
dp->d_secpercyl = dp->d_nsectors * dp->d_ntracks;
|
|
else
|
|
dp->d_secpercyl = atol(buf);
|
|
fprintf(stderr, "Drive-type-specific parameters, <cr> to terminate:\n");
|
|
for (i = 0; i < NDDATA; i++) {
|
|
fprintf(stderr, "d%d? ", i);
|
|
if (fgets(buf, BUFSIZ, stdin) == NULL)
|
|
return ((struct disklabel *)0);
|
|
if ((cp = strchr(buf, '\n')) != NULL)
|
|
*cp = '\0';
|
|
if (buf[0] == 0)
|
|
break;
|
|
dp->d_drivedata[i] = atol(buf);
|
|
}
|
|
return (dp);
|
|
}
|
|
|
|
static int
|
|
gettype(const char *t, const char *const *names)
|
|
{
|
|
const char *const *nm;
|
|
|
|
for (nm = names; *nm; nm++)
|
|
if (strcasecmp(t, *nm) == 0)
|
|
return (nm - names);
|
|
if (isdigit((unsigned char)*t))
|
|
return (atoi(t));
|
|
return (-1);
|
|
}
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
(void)fprintf(stderr, "usage: diskpart [-dp] [-s size] disk-type\n");
|
|
exit(1);
|
|
}
|