457 lines
12 KiB
C
457 lines
12 KiB
C
/*
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* Copyright (c) 1994, Paul Richards.
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*
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* All rights reserved.
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*
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* This software may be used, modified, copied, distributed, and
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* sold, in both source and binary form provided that the above
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* copyright and these terms are retained, verbatim, as the first
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* lines of this file. Under no circumstances is the author
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* responsible for the proper functioning of this software, nor does
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* the author assume any responsibility for damages incurred with
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* its use.
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*/
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#include <stdio.h>
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#include <unistd.h>
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#include <dialog.h>
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#include <fcntl.h>
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#include <fstab.h>
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#ifdef __i386__ /* temp measure delete nov 15 1994 */
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#define i386 1
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#else
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#warning FOO
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#endif
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#include <sys/types.h>
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#include <sys/devconf.h>
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#include <sys/disklabel.h>
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#include <sys/uio.h>
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#include "sysinstall.h"
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#include "disk.h"
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#include "editor.h"
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#include "mbr.h"
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char *part_type(int);
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int write_mbr(char *, struct mbr *);
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int read_mbr(char *, struct mbr *);
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void show_mbr(struct mbr *);
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int clear_mbr(struct mbr *, char *);
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int build_mbr(struct mbr *, char *, struct disklabel *);
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extern char boot1[];
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extern struct disk disk_list[];
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struct part_type part_types[] = PARTITION_TYPES
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struct field *last_field;
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char *
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part_type(int type)
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{
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int num_types = (sizeof(part_types)/sizeof(struct part_type));
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int next_type = 0;
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struct part_type *ptr = part_types;
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while (next_type < num_types) {
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if(ptr->type == type)
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return(ptr->name);
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ptr++;
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next_type++;
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}
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return("Unknown");
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}
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int
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read_mbr(char *device, struct mbr *mbr)
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{
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int fd;
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if ((fd = open(device, O_RDONLY)) == -1) {
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sprintf(errmsg,
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"Couldn't open device %s to read master boot record\n",
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device);
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return(-1);
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}
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if (lseek(fd, 0, SEEK_SET) == -1) {
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sprintf(errmsg,
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"Couldn't seek to track 0 of device %s to read master boot record\n",
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device);
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return(-1);
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}
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if (read(fd, &(mbr->bootcode), MBRSIZE) == -1) {
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sprintf(errmsg, "Failed to read master boot record from device %s\n",
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device);
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return(-1);
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}
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if (close(fd) == -1) {
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sprintf(errmsg,
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"Couldn't close device %s after reading master boot record\n",
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device);
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return(-1);
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}
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return(0);
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}
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int
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write_mbr(char *device, struct mbr *mbr)
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{
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int fd;
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if ((fd = open(device, O_WRONLY)) == -1) {
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sprintf(errmsg,
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"Couldn't open device %s to write master boot record\n",
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device);
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return(-1);
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}
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if (lseek(fd, 0, SEEK_SET) == -1) {
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sprintf(errmsg,
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"Couldn't seek to track 0 of device %s to write master boot record\n",
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device);
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return(-1);
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}
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if (enable_label(fd) == -1) {
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sprintf(errmsg,
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"Couldn't write enable MBR area of device %s\n",
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device);
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return(-1);
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}
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if (write(fd, mbr->bootcode, MBRSIZE) == -1) {
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sprintf(errmsg, "Failed to write master boot record to device %s\n",
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device);
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return(-1);
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}
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if (disable_label(fd) == -1) {
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sprintf(errmsg,
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"Couldn't write disable MBR area of device %s\n",
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device);
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return(-1);
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}
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if (close(fd) == -1) {
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sprintf(errmsg,
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"Couldn't close device %s after reading master boot record\n",
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device);
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return(-1);
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}
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return(0);
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}
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int
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clear_mbr(struct mbr *mbr, char *bootcode)
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{
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int i;
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int fd;
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/*
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* Must replace any old bootcode that was read
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* from disk with our bootblocks.
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*/
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TellEm("Loading MBR code from %s", bootcode);
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fd = open(bootcode, O_RDONLY);
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if (fd < 0) {
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sprintf(errmsg, "Couldn't open boot file %s\n", bootcode);
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return(-1);
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}
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if (read(fd, mbr->bootcode, MBRSIZE) < 0) {
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sprintf(errmsg, "Couldn't read from boot file %s\n", bootcode);
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return(-1);
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}
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if (close(fd) == -1) {
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sprintf(errmsg, "Couldn't close boot file %s\n", bootcode);
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return(-1);
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}
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/* Create an empty partition table */
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for (i=0; i < NDOSPART; i++) {
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mbr->dospart[i].dp_flag = 0;
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mbr->dospart[i].dp_shd = 0;
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mbr->dospart[i].dp_ssect = 0;
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mbr->dospart[i].dp_scyl = 0;
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mbr->dospart[i].dp_typ = 0;
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mbr->dospart[i].dp_ehd = 0;
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mbr->dospart[i].dp_esect = 0;
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mbr->dospart[i].dp_ecyl = 0;
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mbr->dospart[i].dp_start = 0;
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mbr->dospart[i].dp_size = 0;
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}
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mbr->magic = MBR_MAGIC;
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dialog_clear();
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return(0);
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}
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int
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dedicated_mbr(struct mbr *mbr, char *bootcode, struct disklabel *lbl)
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{
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struct dos_partition *dp = &mbr->dospart[0];
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if (clear_mbr(mbr, bootcode) == -1)
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return(-1);
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dp->dp_scyl = 0;
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dp->dp_shd = 1;
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dp->dp_ssect = 1;
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dp->dp_ecyl = lbl->d_ncylinders - 1;
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dp->dp_ehd = lbl->d_ntracks - 1;
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dp->dp_esect = lbl->d_nsectors;
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dp->dp_start = (dp->dp_scyl * lbl->d_ntracks * lbl->d_nsectors) +
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(dp->dp_shd * lbl->d_nsectors) +
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dp->dp_ssect - 1;
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dp->dp_size =
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(lbl->d_nsectors * lbl->d_ntracks * lbl->d_ncylinders) - dp->dp_start;
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dp->dp_typ = MBR_PTYPE_FreeBSD;
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dp->dp_flag = ACTIVE;
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return(0);
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}
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int
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get_geom_values(int disk)
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{
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WINDOW *window;
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struct disklabel *lbl = &disk_list[disk].lbl;
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int key = 0;
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int cur_field = 0;
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int next = 0;
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int done=0;
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struct field field[] = {
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{2, 28, 06, 10, 01, 04, 01, 4, 01, "Unset", F_EDIT, 0, 0},
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{4, 28, 06, 10, 02, 00, 02, 0, 02, "Unset", F_EDIT, 0, 0},
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{6, 28, 06, 10, 03, 01, 03, 1, 03, "Unset", F_EDIT, 0, 0},
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{10, 7, 2, 2, 4, 2, 4, 2, 4, "OK", F_BUTTON, 0, 0},
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{10, 20, 6, 6, 0, 3, 0, 3, 0, "Cancel", F_BUTTON, 0, 0},
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{0, 07, 24, 24, -1, -1, -1, -1, -1, "BIOS geometry parameters", F_TITLE, 0, 0},
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{2, 02, 20, 20, -1, -1, -1, -1, -1, "Number of cylinders:", F_TITLE, 0, 0},
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{4, 02, 25, 25, -1, -1, -1, -1, -1, "Number of tracks (heads):", F_TITLE, 0, 0},
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{6, 02, 18, 18, -1, -1, -1, -1, -1, "Number of sectors:", F_TITLE, 0, 0}
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};
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if (!(window = newwin(14, 40, 5, 20))) {
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sprintf(errmsg, "Failed to open window for geometry editor");
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return (-1);
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};
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keypad(window, TRUE);
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dialog_clear_norefresh();
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draw_box(window, 0, 0, 14, 40, dialog_attr, border_attr);
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done = 0;
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while (!done && (key != ESC)) {
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sprintf(field[0].field, "%ld", lbl->d_ncylinders);
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sprintf(field[1].field, "%ld", lbl->d_ntracks);
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sprintf(field[2].field, "%ld", lbl->d_nsectors);
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disp_fields(window, field, sizeof(field)/sizeof(struct field));
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switch (field[cur_field].type) {
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case F_EDIT:
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key = line_edit(window, field[cur_field].y, field[cur_field].x,
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field[cur_field].width, field[cur_field].maxlen,
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item_selected_attr, 1, field[cur_field].field);
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break;
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case F_BUTTON:
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key = button_press(window, field[cur_field]);
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if (!key && !strcmp(field[cur_field].field, "OK")) {
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done = 1;
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continue;
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}
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if (!key && !strcmp(field[cur_field].field, "Cancel")) {
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sprintf(errmsg, "\nUser aborted.\n");
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dialog_clear_norefresh();
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return (-1);
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}
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case F_TOGGLE:
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case F_TITLE:
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default:
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break;
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}
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next = change_field(field[cur_field], key);
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if (next == -1)
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beep();
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else
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cur_field = next;
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lbl->d_ncylinders = atoi(field[0].field);
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lbl->d_ntracks = atoi(field[1].field);
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lbl->d_nsectors = atoi(field[2].field);
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}
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delwin(window);
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refresh();
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return (0);
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}
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int
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edit_mbr(int disk)
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{
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WINDOW *window;
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int cur_field;
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int i;
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int ok;
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int next;
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int key = 0;
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struct mbr *mbr = &disk_list[disk].mbr;
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/* Confirm disk parameters */
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#ifdef 0
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dialog_msgbox("\nBIOS disk geometry values", "In order to setup the boot area of the disk it is necessary to know the BIOS values for the disk geometry i.e. the number of cylinders, heads and sectors. These values may be different form the real geometry of the disk, depending on whether or not your system uses geometry translation. At this stage it is the entries from the BIOS that are needed. If you do not know these they can be found by rebooting the machine and entering th BIOS setup routine. See you BIOS manual for details.\n", -1, -1, 1)
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#endif
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if (get_geom_values(disk) == -1)
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return(-1);
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/* Read MBR from disk */
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sprintf(scratch, "/dev/r%s%dd", disk_list[disk].devconf->dc_name,
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disk_list[disk].devconf->dc_unit);
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if (read_mbr(scratch, &disk_list[disk].mbr) == -1) {
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sprintf(scratch, "The following error occured while trying\nto read the master boot record:\n\n%s\nIn order to install FreeBSD a new master boot record\nwill have to be written which will mean all current\ndata on the hard disk will be lost.", errmsg);
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ok = 0;
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while (!ok) {
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AskAbort(scratch);
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if (!dialog_yesno(TITLE,
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"\nAre you sure you wish to proceed ?\n",
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-1, -1)) {
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dialog_clear();
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if (dedicated_mbr(mbr, boot1, &disk_list[disk].lbl) == -1) {
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sprintf(scratch, "\nCouldn't create new master boot record.\n\n%s", errmsg);
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return(-1);
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}
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ok = 1;
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}
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}
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}
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sprintf(scratch, "\nDo you wish to dedicate the whole disk to FreeBSD?\n\nDoing so will overwrite any existing data on the disk.\n");
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dialog_clear_norefresh();
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if (!dialog_yesno(TITLE, scratch, -1, -1))
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if (dedicated_mbr(mbr, boot1, &disk_list[disk].lbl) == -1) {
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sprintf(scratch, "\nCouldn't dedicate disk to FreeBSD.\n\n %s", errmsg);
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return(-1);
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}
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if (!(window = newwin(LINES, COLS, 0, 0))) {
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sprintf(errmsg, "Failed to open window for MBR editor\n");
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return (-1);
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};
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keypad(window, TRUE);
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dialog_clear_norefresh();
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draw_box(window, 0, 0, LINES, COLS, dialog_attr, border_attr);
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cur_field = 1;
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ok = 0;
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while (!ok && (key != ESC)) {
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for (i=0; i < NDOSPART; i++) {
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sprintf(mbr_field[(i*12)+1].field, "%d", mbr->dospart[i].dp_typ);
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sprintf(mbr_field[(i*12)+2].field, "%ld", mbr->dospart[i].dp_start);
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sprintf(mbr_field[(i*12)+3].field, "%d", mbr->dospart[i].dp_scyl);
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sprintf(mbr_field[(i*12)+4].field, "%d", mbr->dospart[i].dp_shd);
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sprintf(mbr_field[(i*12)+5].field, "%d", mbr->dospart[i].dp_ssect);
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sprintf(mbr_field[(i*12)+6].field, "%d", 0);
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sprintf(mbr_field[(i*12)+7].field, "%d", mbr->dospart[i].dp_ecyl);
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sprintf(mbr_field[(i*12)+8].field, "%d", mbr->dospart[i].dp_ehd);
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sprintf(mbr_field[(i*12)+9].field, "%d", mbr->dospart[i].dp_esect);
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sprintf(mbr_field[(i*12)+10].field, "%ld", mbr->dospart[i].dp_size);
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sprintf(mbr_field[(i*12)+11].field, "%d", sectstoMb(mbr->dospart[i].dp_size, 512));
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sprintf(mbr_field[(i*12)+12].field, "%d", mbr->dospart[i].dp_flag);
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}
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disp_fields(window, mbr_field, sizeof(mbr_field)/sizeof(struct field));
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switch (mbr_field[cur_field].type) {
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case F_EDIT:
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key = line_edit(window, mbr_field[cur_field].y,
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mbr_field[cur_field].x,
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mbr_field[cur_field].width,
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mbr_field[cur_field].maxlen,
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item_selected_attr, 1,
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mbr_field[cur_field].field);
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/* Propagate changes to MBR */
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for (i=0; i < NDOSPART; i++) {
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mbr->dospart[i].dp_typ = atoi(mbr_field[(i*12)+1].field);
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mbr->dospart[i].dp_start = atoi(mbr_field[(i*12)+2].field);
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mbr->dospart[i].dp_scyl = atoi(mbr_field[(i*12)+3].field);
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mbr->dospart[i].dp_shd = atoi(mbr_field[(i*12)+4].field);
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mbr->dospart[i].dp_ssect = atoi(mbr_field[(i*12)+5].field);
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mbr->dospart[i].dp_ecyl = atoi(mbr_field[(i*12)+7].field);
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mbr->dospart[i].dp_ehd = atoi(mbr_field[(i*12)+8].field);
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mbr->dospart[i].dp_esect = atoi(mbr_field[(i*12)+9].field);
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mbr->dospart[i].dp_size = atoi(mbr_field[(i*12)+10].field);
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}
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break;
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case F_BUTTON:
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key = button_press(window, mbr_field[cur_field]);
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if (!key && !strcmp(mbr_field[cur_field].field, "OK")) {
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ok = 1;
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continue;
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}
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if (!key && !strcmp(mbr_field[cur_field].field, "Cancel")) {
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sprintf(errmsg, "\nUser aborted.\n");
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dialog_clear_norefresh();
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return (-1);
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}
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break;
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case F_TOGGLE:
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case F_TITLE:
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default:
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break;
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}
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next = change_field(mbr_field[cur_field], key);
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if (next == -1)
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beep();
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else
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cur_field = next;
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}
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/* Clear active flags */
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for (i=0; i < NDOSPART; i++)
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mbr->dospart[i].dp_flag = 0;
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/* Find first FreeBSD partition and make it active */
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disk_list[disk].inst_part = -1;
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for (i=0; i < NDOSPART; i++)
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if (mbr->dospart[i].dp_typ == MBR_PTYPE_FreeBSD) {
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disk_list[disk].inst_part = i;
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mbr->dospart[i].dp_flag = ACTIVE;
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break;
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}
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sprintf(scratch, "\nWriting a new master boot record can erase the current disk contents.\n\n Are you sure you want to write the new MBR?\n");
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dialog_clear_norefresh();
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if (!dialog_yesno("Write new MBR?", scratch, -1, -1)) {
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sprintf(scratch, "/dev/r%s%dd", disk_list[disk].devconf->dc_name,
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disk_list[disk].devconf->dc_unit);
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if (write_mbr(scratch, mbr) == -1) {
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sprintf(scratch, "\nThe following error occured while trying to write the new MBR.\n\n%s", errmsg);
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return(-1);
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}
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}
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if (disk_list[disk].inst_part == -1) {
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sprintf(errmsg, "\nThere is no space allocated to FreeBSD on %s\n",
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diskname(disk));
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return (-1);
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}
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delwin(window);
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dialog_clear();
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return (0);
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}
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