143 lines
5.2 KiB
C
143 lines
5.2 KiB
C
/* $NetBSD: fdisk.c,v 1.11 1999/01/23 06:11:51 garbled 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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*
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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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/* fdisk.c -- routines to deal with /sbin/fdisk ... */
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#include <stdio.h>
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#include "defs.h"
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#include "md.h"
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#include "txtwalk.h"
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#include "msg_defs.h"
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#include "menu_defs.h"
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struct lookfor fdiskbuf[] = {
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{"DLCYL", "DLCYL=%d", "a $0", &dlcyl, 1, 0, NULL},
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{"DLHEAD", "DLHEAD=%d", "a $0", &dlhead, 1, 0, NULL},
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{"DLSEC", "DLSEC=%d", "a $0", &dlsec, 1, 0, NULL},
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{"BCYL", "BCYL=%d", "a $0", &bcyl, 1, 0, NULL},
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{"BHEAD", "BHEAD=%d", "a $0", &bhead, 1, 0, NULL},
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{"BSEC", "BSEC=%d", "a $0", &bsec, 1, 0, NULL},
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{"PART0ID", "PART0ID=%d", "a $0", &part[0][ID], 1, 0, NULL},
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{"PART0SIZE", "PART0SIZE=%d", "a $0", &part[0][SIZE], 1, 0, NULL},
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{"PART0START", "PART0START=%d", "a $0", &part[0][START], 1, 0, NULL},
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{"PART0FLAG", "PART0FLAG=0x%d", "a $0", &part[0][FLAG], 1, 0, NULL},
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{"PART1ID", "PART1ID=%d", "a $0", &part[1][ID], 1, 0, NULL},
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{"PART1SIZE", "PART1SIZE=%d", "a $0", &part[1][SIZE], 1, 0, NULL},
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{"PART1START", "PART1START=%d", "a $0", &part[1][START], 1, 0, NULL},
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{"PART1FLAG", "PART1FLAG=0x%d", "a $0", &part[1][FLAG], 1, 0, NULL},
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{"PART2ID", "PART2ID=%d", "a $0", &part[2][ID], 1, 0, NULL},
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{"PART2SIZE", "PART2SIZE=%d", "a $0", &part[2][SIZE], 1, 0, NULL},
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{"PART2START", "PART2START=%d", "a $0", &part[2][START], 1, 0, NULL},
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{"PART2FLAG", "PART2FLAG=0x%d", "a $0", &part[2][FLAG], 1, 0, NULL},
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{"PART3ID", "PART3ID=%d", "a $0", &part[3][ID], 1, 0, NULL},
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{"PART3SIZE", "PART3SIZE=%d", "a $0", &part[3][SIZE], 1, 0, NULL},
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{"PART3START", "PART3START=%d", "a $0", &part[3][START], 1, 0, NULL},
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{"PART3FLAG", "PART3FLAG=0x%d", "a $0", &part[3][FLAG], 1, 0, NULL}
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};
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int numfdiskbuf = sizeof(fdiskbuf) / sizeof(struct lookfor);
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/*
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* Fetch current MBR from disk into core by parsing /sbin/fdisk output.
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*/
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void
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get_fdisk_info()
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{
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char *textbuf;
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int textsize;
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int t1, t2;
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/* Get Fdisk information */
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textsize = collect(T_OUTPUT, &textbuf,
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"/sbin/fdisk -S /dev/r%sd 2>/dev/null", diskdev);
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if (textsize < 0) {
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(void)fprintf(stderr, "Could not run fdisk.");
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if (logging)
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(void)fprintf(log, "Aborting: Could not run fdisk.\n");
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exit (1);
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}
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walk(textbuf, textsize, fdiskbuf, numfdiskbuf);
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free(textbuf);
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/*
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* A common failure of fdisk is to get the number of cylinders
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* wrong and the number of sectors and heads right. This makes
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* a disk look very big. In this case, we can just recompute
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* the number of cylinders and things should work just fine.
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* Also, fdisk may correctly indentify the settings to include
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* a cylinder total > 1024, because translation mode is not used.
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* Check for it.
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*/
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/* XXX should warn user about this, and maybe ask! */
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if (bcyl > 1024 && disk->geom[1] == bhead && disk->geom[2] == bsec)
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bcyl = 1024;
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else if (bcyl > 1024 && bsec < 64) {
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t1 = disk->geom[0] * disk->geom[1] * disk->geom[2];
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t2 = bhead * bsec;
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if (bcyl * t2 > t1) {
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t2 = t1 / t2;
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if (t2 < 1024)
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bcyl = t2;
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}
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}
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}
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/*
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* Write incore MBR geometry and partition info to disk
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* using /sbin/fdisk.
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*/
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void
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set_fdisk_info()
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{
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int i;
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for (i = 0; i < 4; i++)
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if (part[i][SET])
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run_prog(0, 1, "/sbin/fdisk -u -f -%d -b %d/%d/%d "
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"-s %d/%d/%d /dev/r%sd",
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i, bcyl, bhead, bsec,
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part[i][ID], part[i][START],
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part[i][SIZE], diskdev);
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if (activepart >= 0)
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run_prog(0, 1, "/sbin/fdisk -a -%d -f /dev/r%s",
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activepart, diskdev);
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}
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