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/*
* Copyright (c) 1996, 1998 University of Utah and the Flux Group.
* All rights reserved.
*
* This file is part of the Flux OSKit. The OSKit is free software, also known
* as "open source;" you can redistribute it and/or modify it under the terms
* of the GNU General Public License (GPL), version 2, as published by the Free
* Software Foundation (FSF). To explore alternate licensing terms, contact
* the University of Utah at csl-dist@cs.utah.edu or +1-801-585-3271.
*
* The OSKit is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GPL for more details. You should have
* received a copy of the GPL along with the OSKit; see the file COPYING. If
* not, write to the FSF, 59 Temple Place #330, Boston, MA 02111-1307, USA.
*/
/*
* This contains the code that searches a disk for partitions.
* It is possible (and straightforward) to modify this code to find every
* possible combination of nestings, to any depth.
* However, this functionality was not currently required.
*
* The future plan is to have it recursivly search all partitions found
* for any partitions of any type.
*/
#include <sys/types.h>
#include <stdio.h>
#include <oskit/diskpart/diskpart.h>
#include <oskit/diskpart/pcbios.h> /*XXX*/
/* I check the return type after each call to get partition information */
#define diskpart_check_get(w) { if ((w < 0) || (w > array_size)) return(w); }
/* array is a pointer to an array of partition_info structures */
/* array_size is the number of pre-allocated entries there are */
int
diskpart_get_partition(void *driver_info, int (*bottom_read_fun)(),
struct diskpart *array, int array_size,
int disk_size)
{
char buff[SECTOR_SIZE];
int i,n,cnt;
int arrsize;
/* first fill in the entire disk stuff */
/* or should the calling routine do that already? */
diskpart_fill_entry(array, 0, disk_size, NULL, 0, -1, -1);
arrsize = array_size -1; /* 1 for whole disk */
/* search for dos partition table */
/* find all the partitions (including logical) */
n = diskpart_get_dos(&array[1], buff, 0,
driver_info, (bottom_read_fun), arrsize);
diskpart_check_get(n);
if (n > 0) { /* whole drive is DOS type */
diskpart_fill_entry(array, 0, disk_size, &array[1], n,
DISKPART_DOS, 256+DISKPART_DOS);
arrsize -= n;
/* search each one for a BSD disklabel (iff BSDOS) */
/* note: searching logical partitions as well */
for (i = 0; i < n; i++)
if (array[i+1].fsys == BSDOS) {
cnt = diskpart_get_disklabel(&array[n+1], buff,
array[i+1].start,
driver_info, (bottom_read_fun),
arrsize);
diskpart_check_get(cnt);
if (cnt > 0) {
arrsize -= cnt;
diskpart_fill_entry(&array[i+1],
array[i+1].start,
array[i+1].size, &array[n+1],
cnt, DISKPART_BSD,
array[i+1].fsys);
}
n += cnt;
}
/* search for VTOC -- in a DOS partition as well */
for (i = 0; i < n; i++)
if (array[i+1].fsys == UNIXOS) {
cnt = diskpart_get_vtoc(&array[n+1], buff,
array[i+1].start,
driver_info, (bottom_read_fun),
arrsize);
diskpart_check_get(cnt);
if (cnt > 0) {
arrsize -= cnt;
diskpart_fill_entry(&array[i+1],
array[i+1].start,
array[i+1].size, &array[n+1],
cnt, DISKPART_VTOC,
array[i+1].fsys);
}
n += cnt;
}
}
/* search for only disklabel */
if (n == 0) {
diskpart_fill_entry(array, 0, disk_size, &array[1], n,
DISKPART_BSD, 256+DISKPART_BSD);
n = diskpart_get_disklabel(&array[1], buff, 0, driver_info,
(bottom_read_fun), arrsize);
diskpart_check_get(n);
if (n == 0) { /* HP-BSD labels ... */
n = diskpart_get_disklabel(&array[1], buff, 1,
driver_info, (bottom_read_fun), arrsize);
diskpart_check_get(n);
}
if (n > 0) {
diskpart_fill_entry(array, 0, disk_size, &array[1], n,
DISKPART_BSD, 256+DISKPART_BSD);
}
}
/* search for only VTOC -- NOT TESTED! */
if (n == 0) {
diskpart_fill_entry(array, 0, disk_size, &array[1], n,
DISKPART_VTOC, 256+DISKPART_VTOC);
n = diskpart_get_vtoc(&array[1], buff, 0, driver_info,
(bottom_read_fun), arrsize);
diskpart_check_get(n);
if (n > 0) {
diskpart_fill_entry(array, 0, disk_size, &array[1], n,
DISKPART_VTOC, 256+DISKPART_VTOC);
}
}
#if 0
/* search for only omron -- NOT TESTED! */
if (n == 0) {
diskpart_fill_entry(array, 0, disk_size, &array[1], n,
DISKPART_OMRON, 256+DISKPART_OMRON);
n = diskpart_get_omron(&array[1], buff, 0,driver_info,
(bottom_read_fun), arrsize);
diskpart_check_get(n);
}
/* search for only dec -- NOT TESTED! */
if (n == 0) {
diskpart_fill_entry(array, 0, disk_size, &array[1], n,
DISKPART_DEC, 256+DISKPART_DEC);
n = diskpart_get_dec(&array[1], buff, 0, driver_info,
(bottom_read_fun), arrsize);
diskpart_check_get(n);
}
#endif 0
return(n);
}
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