328 lines
8.1 KiB
C
328 lines
8.1 KiB
C
/* $NetBSD: mbr.c,v 1.6 1998/02/24 05:36:03 jonathan Exp $ */
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/*
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* Copyright 1997 Piermont Information Systems Inc.
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* All rights reserved.
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* * Copyright 1997 Piermont Information Systems Inc.
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* All rights reserved.
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*
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* Written by Philip A. Nelson for Piermont Information Systems Inc.
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software develooped for the NetBSD Project by
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* Piermont Information Systems Inc.
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* 4. The name of Piermont Information Systems Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY PIERMONT INFORMATION SYSTEMS INC. ``AS IS''
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* AND 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 PIERMONT INFORMATION SYSTEMS INC. BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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/* mbr.c -- DOS Master Boot Record editing code */
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#include <stdio.h>
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#include <util.h>
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#include "defs.h"
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#include "md.h"
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#include "msg_defs.h"
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#include "menu_defs.h"
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struct part_id {
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int id;
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char *name;
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} part_ids[] = {
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{0, "unused"},
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{1, "Primary DOS, 12 bit FAT"},
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{4, "Primary DOS, 16 bit FAT <32M"},
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{5, "Extended DOS"},
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{6, "Primary DOS, 16-bit FAT >32MB"},
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{7, "NTFS"},
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{131, "Linux native"},
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{131, "Linux swap"},
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{165, "NetBSD/FreeBSD/386bsd"},
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{169, "new NetBSD"},
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{-1, "Unknown"},
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};
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/*
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* Define symbolic name for MBR IDs if undefined, for backwards
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* source compatibility.
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*/
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#ifndef DOSPTYP_NETBSD
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#define DOSPTYP_NETBSD 0xa9
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#endif
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#ifndef DOSPTYP_386BSD
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#define DOSPTYP_386BSD 0xa5
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#endif
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/*
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* Which MBR partition ID to use for a newly-created NetBSD partition.
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* Left patchable as we're in the middle of changing partition IDs.
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*/
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#ifdef notyet
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#define DOSPTYP_OURS DOSPTYP_NETBSD /* NetBSD >= 1.3D */
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#else
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#define DOSPTYP_OURS DOSPTYP_386BSD /* 386bsd, FreeBSD, old NetBSD */
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#endif
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int dosptyp_nbsd = DOSPTYP_OURS;
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/* prototypes */
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int otherpart(int id);
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int ourpart(int id);
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int edit_mbr __P((void));
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/*
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* First, geometry stuff...
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*/
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int check_geom (void)
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{
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return bcyl <= 1024 && bsec < 64 && bcyl > 0 && bhead > 0 && bsec > 0;
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}
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/*
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* get C/H/S geometry from user via menu interface and
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* store in globals.
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*/
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void set_fdisk_geom (void)
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{
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char res[80];
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msg_display_add(MSG_setbiosgeom);
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disp_cur_geom();
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msg_printf_add ("\n");
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msg_prompt_add (MSG_cylinders, NULL, res, 80);
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bcyl = atoi(res);
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msg_prompt_add (MSG_heads, NULL, res, 80);
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bhead = atoi(res);
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msg_prompt_add (MSG_sectors, NULL, res, 80);
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bsec = atoi(res);
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bstuffset = 1;
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}
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void disp_cur_geom (void)
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{
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msg_display_add(MSG_realgeom, dlcyl, dlhead, dlsec);
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msg_display_add(MSG_biosgeom, bcyl, bhead, bsec);
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}
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/*
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* Then, the partition stuff...
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*/
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int
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otherpart(int id)
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{
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return (id != 0 && id != DOSPTYP_386BSD && id != DOSPTYP_NETBSD);
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}
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int
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ourpart(int id)
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{
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return (id != 0 && (id == DOSPTYP_386BSD || id == DOSPTYP_NETBSD));
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}
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/*
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* Let user change incore Master Boot Record partitions via menu.
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*/
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int edit_mbr()
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{
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int i, j;
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/* Ask full/part */
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msg_display (MSG_fullpart, diskdev);
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process_menu (MENU_fullpart);
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/* DOS fdisk label checking and value setting. */
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if (usefull) {
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int otherparts = 0;
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int ourparts = 0;
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int i;
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/* Count nonempty, non-BSD partitions. */
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for (i = 0; i < 4; i++) {
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otherparts += otherpart(part[0][ID]);
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/* check for dualboot *bsd too */
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ourparts += ourpart(part[0][ID]);
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}
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/* Ask if we really want to blow away non-NetBSD stuff */
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if (otherparts != 0 || ourparts > 1) {
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msg_display (MSG_ovrwrite);
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process_menu (MENU_noyes);
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if (!yesno) {
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endwin();
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return 0;
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}
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}
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/* Set the partition information for full disk usage. */
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part[0][ID] = part[0][SIZE] = 0;
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part[0][SET] = 1;
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part[1][ID] = part[1][SIZE] = 0;
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part[1][SET] = 1;
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part[2][ID] = part[2][SIZE] = 0;
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part[2][SET] = 1;
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part[3][ID] = dosptyp_nbsd;
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part[3][SIZE] = bsize - bsec;
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part[3][START] = bsec;
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part[3][FLAG] = 0x80;
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part[3][SET] = 1;
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ptstart = bsec;
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ptsize = bsize - bsec;
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fsdsize = dlsize;
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fsptsize = dlsize - bsec;
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fsdmb = fsdsize / MEG;
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activepart = 3;
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} else {
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int numbsd, overlap;
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int numfreebsd, freebsdpart; /* dual-boot */
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/* Ask for sizes, which partitions, ... */
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ask_sizemult();
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bsdpart = freebsdpart = -1;
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activepart = -1;
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for (i=0; i<4; i++)
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if (part[i][FLAG] != 0)
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activepart = i;
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do {
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process_menu (MENU_editparttable);
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numbsd = 0;
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bsdpart = -1;
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freebsdpart = -1;
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numfreebsd = 0;
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overlap = 0;
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yesno = 0;
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for (i=0; i<4; i++) {
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/* Count 386bsd/FreeBSD/NetBSD partitions */
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if (part[i][ID] == DOSPTYP_386BSD) {
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freebsdpart = i;
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numfreebsd++;
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}
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/* Count NetBSD-only partitions */
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if (part[i][ID] == DOSPTYP_NETBSD) {
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bsdpart = i;
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numbsd++;
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}
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for (j = i+1; j<4; j++)
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if (partsoverlap(i,j))
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overlap = 1;
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}
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/* If no new-NetBSD partition, use 386bsd instead */
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if (numbsd == 0 && numfreebsd > 0) {
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numbsd = numfreebsd;
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bsdpart = freebsdpart;
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/* XXX check partition type? */
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}
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/* Check for overlap or multiple native partitions */
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if (overlap || numbsd != 1) {
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msg_display (MSG_reeditpart);
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process_menu (MENU_yesno);
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}
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} while (yesno && (numbsd != 1 || overlap));
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if (numbsd == 0) {
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msg_display (MSG_nobsdpart);
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process_menu (MENU_ok);
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return 0;
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}
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if (numbsd > 1) {
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msg_display (MSG_multbsdpart, bsdpart);
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process_menu (MENU_ok);
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}
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ptstart = part[bsdpart][START];
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ptsize = part[bsdpart][SIZE];
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fsdsize = dlsize;
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if (ptstart + ptsize < bsize)
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fsptsize = ptsize;
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else
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fsptsize = dlsize - ptstart;
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fsdmb = fsdsize / MEG;
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/* Ask if a boot selector is wanted. XXXX */
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}
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/* Compute minimum NetBSD partition sizes (in sectors). */
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minfsdmb = (80 + 4*rammb) * (MEG / sectorsize);
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if (usefull)
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swapadj = bsec;
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return 1;
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}
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int partsoverlap(int i, int j)
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{
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if (part[i][SIZE] == 0 || part[j][SIZE] == 0)
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return 0;
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return
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(part[i][START] < part[j][START] &&
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part[i][START] + part[i][SIZE] > part[j][START])
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||
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(part[i][START] > part[j][START] &&
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part[i][START] < part[j][START] + part[j][SIZE])
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||
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(part[i][START] == part[j][START]);
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}
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void disp_cur_part(int sel, int disp)
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{
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int i, j, start, stop, rsize, rend;
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if (disp < 0)
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start = 0, stop = 4;
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else
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start = disp, stop = disp+1;
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msg_display_add (MSG_part_head, multname, multname, multname);
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for (i=start; i<stop; i++) {
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if (sel == i) msg_standout();
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if (part[i][SIZE] == 0 && part[i][START] == 0)
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msg_printf_add ("%d %36s ", i, "");
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else {
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rsize = part[i][SIZE] / sizemult;
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if (part[i][SIZE] % sizemult)
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rsize++;
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rend = (part[i][START] + part[i][SIZE]) / sizemult;
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if ((part[i][SIZE] + part[i][SIZE]) % sizemult)
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rend++;
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msg_printf_add("%d %12d%12d%12d ", i,
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part[i][START] / sizemult,
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rsize, rend);
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}
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for (j = 0; part_ids[j].id != -1 &&
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part_ids[j].id != part[i][ID]; j++);
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msg_printf_add ("%s\n", part_ids[j].name);
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if (sel == i) msg_standend();
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}
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}
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