/*
FIPS - the First nondestructive Interactive Partition Splitting program
Module fipsspec.cpp
RCS - Header:
$Header: c:/daten/fips/source/main/RCS/fipsspec.cpp 1.4 1995/01/19 00:00:53 schaefer Exp schaefer $
Copyright (C) 1993 Arno Schaefer
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program 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
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
Report problems and direct all questions to:
[email protected]
*/
#include <dos.h>
#include "fipsspec.h"
#include "global.h"
#include "input.h"
#define FIRST_CHECK false
#define FINAL_CHECK true
#define DISK_INT 0x13
#define RESET_DISK 0
#define GET_DRIVE_PARAMS 8
void fips_bpb::print (void)
{
printx ("Bytes per sector: %u\n",bytes_per_sector);
printx ("Sectors per cluster: %u\n",sectors_per_cluster);
printx ("Reserved sectors: %u\n",reserved_sectors);
printx ("Number of FATs: %u\n",no_of_fats);
printx ("Number of rootdirectory entries: %u\n",no_of_rootdir_entries);
printx ("Number of sectors (short): %u\n",no_of_sectors);
printx ("Media descriptor byte: %02Xh\n",media_descriptor);
printx ("Sectors per FAT: %u\n",sectors_per_fat);
printx ("Sectors per track: %u\n",sectors_per_track);
printx ("Drive heads: %u\n",drive_heads);
printx ("Hidden sectors: %lu\n",hidden_sectors);
printx ("Number of sectors (long): %lu\n",no_of_sectors_long);
printx ("Physical drive number: %02Xh\n",phys_drive_no);
printx ("Signature: %02Xh\n\n",signature);
}
void fips_partition_table::print (void)
{
printx (" | | Start | | End | Start |Number of|\n");
printx ("Part.|bootable|Head Cyl. Sector|System|Head Cyl. Sector| Sector |Sectors | MB\n");
printx ("-----+--------+----------------+------+----------------+--------+---------+----\n");
for (int i=0;i<4;i++)
{
printx ("%u | %s |%4u %4u %4u| %02Xh|%4u %4u %4u|%8lu| %8lu|%4lu\n",i+1,
partition_info[i].bootable ? "yes" : " no",
partition_info[i].start_head,partition_info[i].start_cylinder,partition_info[i].start_sector,
partition_info[i].system,partition_info[i].end_head,partition_info[i].end_cylinder,partition_info[i].end_sector,
partition_info[i].start_sector_abs,partition_info[i].no_of_sectors_abs,partition_info[i].no_of_sectors_abs / 2048);
}
}
void fips_harddrive::get_geometry (void)
{
union REGS regs;
regs.h.ah = GET_DRIVE_PARAMS;
regs.h.dl = number;
int86 (DISK_INT,®s,®s);
if (global.debug_mode)
{
fprintf (global.debugfile,"\nRegisters after call to int 13h 08h (drive %02Xh):\n\n",number);
fprintf (global.debugfile," 00 sc/cl hd\n");
fprintf (global.debugfile,"al ah bl bh cl ch dl dh si di cflgs flags\n");
hexwrite ((byte *) ®s,16,global.debugfile);
}
if ((errorcode = regs.h.ah) != 0) return;
geometry.heads = (dword) regs.h.dh + 1;
geometry.sectors = (dword) regs.h.cl & 0x3f;
geometry.cylinders = ((dword) regs.h.ch | (((dword) regs.h.cl << 2) & 0x300)) + 1;
if (global.debug_mode)
{
fprintf (global.debugfile, "\nGeometry reported by BIOS:\n");
fprintf
(
global.debugfile,
"%ld cylinders, %ld heads, %ld sectors\n",
geometry.cylinders,
geometry.heads,
geometry.sectors
);
}
}
void fips_harddrive::reset (void)
{
union REGS regs;
regs.h.ah = RESET_DISK;
regs.h.dl = number;
int86 (DISK_INT,®s,®s);
if (global.debug_mode)
{
fprintf (global.debugfile,"\nRegisters after call to int 13h 00h (drive %02Xh):\n\n",number);
fprintf (global.debugfile,"al ah bl bh cl ch dl dh si di cflgs flags\n");
hexwrite ((byte *) ®s,16,global.debugfile);
}
errorcode = regs.h.ah;
}
void fips_logdrive_info::put_debug_info (void)
{
fprintf (global.debugfile,"Calculated Partition Characteristica:\n\n");
fprintf (global.debugfile,"Start of FAT 1: %lu\n",start_fat1);
fprintf (global.debugfile,"Start of FAT 2: %lu\n",start_fat2);
fprintf (global.debugfile,"Start of Rootdirectory: %lu\n",start_rootdir);
fprintf (global.debugfile,"Start of Data: %lu\n",start_data);
fprintf (global.debugfile,"Number of Clusters: %lu\n",no_of_clusters);
}
dword fips_partition::min_cylinder (fat16 fat, drive_geometry geometry)
{
dword new_part_min_sector =
info().start_data
+ (dword) 4085
* bpb().sectors_per_cluster;
dword new_part_min_cylinder =
(
new_part_min_sector
+ partition_info->start_sector_abs
- 1
)
/ (geometry.heads * geometry.sectors)
+ 1;
if (new_part_min_cylinder > partition_info->end_cylinder)
error ("Partition too small - can't split");
dword min_free_cluster = fat.min_free_cluster ();
dword min_free_sector =
info().start_data
+ (min_free_cluster - 2)
* (dword) bpb().sectors_per_cluster;
dword min_free_cylinder =
(
min_free_sector
+ partition_info->start_sector_abs
- 1
)
/ (geometry.heads * geometry.sectors)
+ 1;
if (min_free_cylinder > partition_info->end_cylinder)
error ("Last cylinder is not free");
if (new_part_min_cylinder < min_free_cylinder)
new_part_min_cylinder = min_free_cylinder;
return (new_part_min_cylinder);
}
dword fips_partition::min_cylinder (fat32 fat, drive_geometry geometry)
{
dword new_part_min_sector = info().start_data;
dword new_part_min_cylinder =
(
new_part_min_sector
+ partition_info->start_sector_abs
- 1
)
/ (geometry.heads * geometry.sectors)
+ 1;
if (new_part_min_cylinder > partition_info->end_cylinder)
error ("Partition too small - can't split");
dword min_free_cluster = fat.min_free_cluster ();
dword min_free_sector =
info().start_data
+ (min_free_cluster - 2)
* (dword) bpb().sectors_per_cluster;
dword min_free_cylinder =
(
min_free_sector
+ partition_info->start_sector_abs
- 1
)
/ (geometry.heads * geometry.sectors)
+ 1;
if (min_free_cylinder > partition_info->end_cylinder)
error ("Last cylinder is not free");
if (new_part_min_cylinder < min_free_cylinder)
new_part_min_cylinder = min_free_cylinder;
return (new_part_min_cylinder);
}
boolean fips_partition::split (fips_harddrive hd)
{
if (read_boot_sector ())
error ("Error reading boot sector");
if (global.debug_mode)
{
fprintf
(
global.debugfile,
"\nBoot sector drive %02Xh, partition %u:\n\n",
hd.number,
number + 1
);
hexwrite
(
boot_sector->data,
512,
global.debugfile
);
}
get_bpb ();
if (bpb().sectors_per_fat16 == 0)
if (read_fsinfo_sector ())
error ("Error reading FAT32 fsinfo sector");
printx ("\nBoot sector:\n\n");
print_bpb ();
get_info ();
if (global.debug_mode)
write_info_debugfile ();
check ();
dword new_start_cylinder;
if (bpb().sectors_per_fat16 != 0) {
fat16 fat1 (this,1);
fat16 fat2 (this,2);
fat1.check_against (&fat2);
dword new_part_min_cylinder =
min_cylinder (fat2, hd.geometry);
if (ask_if_save()) save_root_and_boot(&hd,this);
new_start_cylinder =
ask_for_new_start_cylinder(
partition_info->start_cylinder,
new_part_min_cylinder,
partition_info->end_cylinder,
hd.geometry.heads * hd.geometry.sectors
);
fat2.check_empty(new_start_cylinder
* hd.geometry.heads
* hd.geometry.sectors
- partition_info->start_sector_abs
);
} else {
fat32 fat1 (this,1);
fat32 fat2 (this,2);
fat1.check_against (&fat2);
dword new_part_min_cylinder =
min_cylinder (fat2, hd.geometry);
if (ask_if_save()) save_root_and_boot(&hd,this);
new_start_cylinder =
ask_for_new_start_cylinder(
partition_info->start_cylinder,
new_part_min_cylinder,
partition_info->end_cylinder,
hd.geometry.heads * hd.geometry.sectors
);
fat2.check_empty(new_start_cylinder
* hd.geometry.heads
* hd.geometry.sectors
- partition_info->start_sector_abs
);
}
hd.calculate_new_root (new_start_cylinder, this);
hd.put_partition_table();
hd.get_partition_table();
printx ("\nNew partition table:\n\n");
hd.print_partition_table ();
hd.check (FINAL_CHECK);
if (ask_if_continue () == false)
{
return (false);
}
calculate_new_boot ();
if (bpb().sectors_per_fat16 == 0)
{
dword clusters = info().no_of_clusters;
fsinfo_sector->data[0x1e8] = clusters & 0xffL;
fsinfo_sector->data[0x1e9] = (clusters & 0xff00L) >> 8;
fsinfo_sector->data[0x1ea] = (clusters & 0xff0000L) >> 16;
fsinfo_sector->data[0x1eb] = (clusters & 0xff000000L) >> 24;
fsinfo_sector->data[0x1ec] = 0xff;
fsinfo_sector->data[0x1ed] = 0xff;
fsinfo_sector->data[0x1ee] = 0xff;
fsinfo_sector->data[0x1ef] = 0xff;
}
put_bpb ();
get_bpb ();
printx ("\nNew boot sector:\n\n");
print_bpb ();
get_info ();
if (global.debug_mode)
write_info_debugfile ();
check();
if (!global.test_mode)
{
ask_for_write_permission ();
if (hd.write_root_sector ())
error ("Error writing root sector");
if (write_boot_sector ())
error ("Error writing boot sector");
if (bpb().sectors_per_fat16 == 0)
if (write_fsinfo_sector ())
error ("Error writing FAT32 fsinfo sector");
printx ("Repartitioning complete\n");
if (bpb().sectors_per_fat16 == 0)
printx ("With FAT32 partitions, you should now run scandisk on the shortened partition.\n");
}
return (true);
}
