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/*
* Copyright (c) 1994, Paul Richards.
*
* All rights reserved.
*
* This software may be used, modified, copied, distributed, and
* sold, in both source and binary form provided that the above
* copyright and these terms are retained, verbatim, as the first
* lines of this file. Under no circumstances is the author
* responsible for the proper functioning of this software, nor does
* the author assume any responsibility for damages incurred with
* its use.
*/
#include <stdio.h>
#include <sys/types.h>
#include <sys/disklabel.h>
#include <sys/uio.h>
#include <unistd.h>
#include <dialog.h>
#include "mbr.h"
extern struct mbr *mbr;
extern char *errmsg;
extern int inst_part;
struct part_type part_types[] = PARTITION_TYPES
char *
part_type(int type)
{
int num_types = (sizeof(part_types)/sizeof(struct part_type));
int next_type = 0;
struct part_type *ptr = part_types;
while (next_type < num_types) {
if(ptr->type == type)
return(ptr->name);
ptr++;
next_type++;
}
return("Uknown");
}
int
read_mbr(int fd, struct mbr *mbr)
{
if (lseek(fd, 0, SEEK_SET) == -1) {
sprintf(errmsg, "Couldn't seek for master boot record read\n");
return(-1);
}
if (read(fd, &(mbr->bootcode), 512) == -1) {
sprintf(errmsg, "Failed to read master boot record\n");
return(-1);
}
/* Validate the master boot record */
if (mbr->magic != MBR_MAGIC) {
sprintf(errmsg, "Master boot record is invalid\n");
return(-1);
}
return(0);
}
int
write_mbr(int fd, struct mbr *mbr)
{
if (lseek(fd, 0, SEEK_SET) == -1) {
sprintf(errmsg, "Couldn't seek for master boot record write\n");
return(-1);
}
if (write(fd, mbr->bootcode, MBRSIZE) == -1) {
sprintf(errmsg, "Failed to write master boot record\n");
return(-1);
}
return(0);
}
void
show_mbr(struct mbr *mbr)
{
int i, j, key = 0;
int x, y;
WINDOW *window;
window = newwin(LINES, COLS, 0, 0);
keypad(window, TRUE);
draw_box(window, 0, 0, LINES - 1, COLS - 1,
COLOR_PAIR(COLOR_YELLOW), COLOR_PAIR(COLOR_BLUE));
for (i=0; i<NDOSPART/2; i++) {
for (j=0; j<NDOSPART/2; j++) {
x = (j * 38) + 3;
y = (i * 11) + 2;
mvwprintw(window, y, x, "Partition %d: flags = %x",
(i*2)+j, mbr->dospart[(i*2)+j].dp_flag);
mvwprintw(window, y+1, x, "Starting at (H%d, S%d, C%d)",
mbr->dospart[(i*2)+j].dp_shd,
mbr->dospart[(i*2)+j].dp_ssect,
mbr->dospart[(i*2)+j].dp_scyl);
mvwprintw(window, y+2, x, "Type: %s (%x)",
part_type(mbr->dospart[(i*2)+j].dp_typ),
mbr->dospart[(i*2)+j].dp_typ);
mvwprintw(window, y+3, x, "Ending at (H%d, S%d, C%d)",
mbr->dospart[(i*2)+j].dp_shd,
mbr->dospart[(i*2)+j].dp_esect,
mbr->dospart[(i*2)+j].dp_ecyl);
mvwprintw(window, y+4, x, "Absolute start sector %ld",
mbr->dospart[(i*2)+j].dp_start);
mvwprintw(window, y+5, x, "Size %ld", mbr->dospart[(i*2)+j].dp_size);
}
}
refresh();
while (key != '\n')
key = wgetch(window);
delwin(window);
}
void
clear_mbr(struct mbr *mbr)
{
int i;
/* Create an empty partition table */
for (i=0; i < NDOSPART; i++) {
mbr->dospart[i].dp_flag = 0;
mbr->dospart[i].dp_shd = 0;
mbr->dospart[i].dp_ssect = 0;
mbr->dospart[i].dp_scyl = 0;
mbr->dospart[i].dp_typ = 0;
mbr->dospart[i].dp_ehd = 0;
mbr->dospart[i].dp_esect = 0;
mbr->dospart[i].dp_ecyl = 0;
mbr->dospart[i].dp_start = 0;
mbr->dospart[i].dp_size = 0;
}
}
int
build_mbr(struct mbr *mbr, struct disklabel *label)
{
int i;
/*
* This is the biggie, need to spend some time getting all
* the different possibilities sorted out.
*/
if (inst_part == -1) {
/* Install to entire disk */
clear_mbr(mbr);
mbr->dospart[0].dp_flag = ACTIVE;
mbr->dospart[0].dp_shd = 1;
mbr->dospart[0].dp_ssect = 0;
mbr->dospart[0].dp_scyl = 0;
mbr->dospart[0].dp_typ = DOSPTYP_386BSD ;
mbr->dospart[0].dp_ehd = label->d_ntracks;
mbr->dospart[0].dp_esect = label->d_nsectors;
mbr->dospart[0].dp_ecyl = label->d_ncylinders;
mbr->dospart[0].dp_start = 0;
mbr->dospart[0].dp_size =
label->d_ntracks * label->d_nsectors * label->d_ncylinders;
return(1);
} else {
/* Validate partition - XXX need to spend some time making this robust */
if ((inst_part) && (!mbr->dospart[inst_part].dp_start)) {
strcpy(errmsg, "The start address of the selected partition is 0\n");
return(0);
}
}
/* Set partition type to FreeBSD and make it the only active partition */
for (i=0; i < NDOSPART; i++)
mbr->dospart[i].dp_flag &= ~ACTIVE;
mbr->dospart[inst_part].dp_typ = DOSPTYP_386BSD;
mbr->dospart[inst_part].dp_flag = ACTIVE;
return(1);
}
void
edit_mbr(struct mbr *mbr, struct disklabel *label)
{
dialog_msgbox("DOS partition table editor",
"This editor is still under construction :-)", 10, 75, 1);
show_mbr(mbr);
}
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