add directory Minix
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285
Minix/CD-ROM-2.0/DOSUTILS/FIPS/SOURCE/FIPSSPEC.CPP
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285
Minix/CD-ROM-2.0/DOSUTILS/FIPS/SOURCE/FIPSSPEC.CPP
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/*
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FIPS - the First nondestructive Interactive Partition Splitting program
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Module fipsspec.cpp
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RCS - Header:
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$Header: c:/daten/fips/source/main/RCS/fipsspec.cpp 1.4 1995/01/19 00:00:53 schaefer Exp schaefer $
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Copyright (C) 1993 Arno Schaefer
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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Report problems and direct all questions to:
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schaefer@rbg.informatik.th-darmstadt.de
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*/
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#include <dos.h>
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#include "fipsspec.h"
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#include "global.h"
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#include "input.h"
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#define FIRST_CHECK false
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#define FINAL_CHECK true
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#define DISK_INT 0x13
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#define RESET_DISK 0
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#define GET_DRIVE_PARAMS 8
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void fips_bpb::print (void)
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{
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printx ("Bytes per sector: %u\n",bytes_per_sector);
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printx ("Sectors per cluster: %u\n",sectors_per_cluster);
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printx ("Reserved sectors: %u\n",reserved_sectors);
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printx ("Number of FATs: %u\n",no_of_fats);
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printx ("Number of rootdirectory entries: %u\n",no_of_rootdir_entries);
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printx ("Number of sectors (short): %u\n",no_of_sectors);
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printx ("Media descriptor byte: %02Xh\n",media_descriptor);
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printx ("Sectors per FAT: %u\n",sectors_per_fat);
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printx ("Sectors per track: %u\n",sectors_per_track);
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printx ("Drive heads: %u\n",drive_heads);
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printx ("Hidden sectors: %lu\n",hidden_sectors);
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printx ("Number of sectors (long): %lu\n",no_of_sectors_long);
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printx ("Physical drive number: %02Xh\n",phys_drive_no);
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printx ("Signature: %02Xh\n\n",signature);
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}
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void fips_partition_table::print (void)
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{
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printx (" | | Start | | End | Start |Number of|\n");
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printx ("Part.|bootable|Head Cyl. Sector|System|Head Cyl. Sector| Sector |Sectors | MB\n");
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printx ("-----+--------+----------------+------+----------------+--------+---------+----\n");
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for (int i=0;i<4;i++)
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{
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printx ("%u | %s |%4u %4u %4u| %02Xh|%4u %4u %4u|%8lu| %8lu|%4lu\n",i+1,
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partition_info[i].bootable ? "yes" : " no",
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partition_info[i].start_head,partition_info[i].start_cylinder,partition_info[i].start_sector,
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partition_info[i].system,partition_info[i].end_head,partition_info[i].end_cylinder,partition_info[i].end_sector,
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partition_info[i].start_sector_abs,partition_info[i].no_of_sectors_abs,partition_info[i].no_of_sectors_abs / 2048);
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}
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}
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void fips_harddrive::get_geometry (void)
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{
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union REGS regs;
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regs.h.ah = GET_DRIVE_PARAMS;
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regs.h.dl = number;
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int86 (DISK_INT,®s,®s);
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if (global.debug_mode)
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{
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fprintf (global.debugfile,"\nRegisters after call to int 13h 08h (drive %02Xh):\n\n",number);
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fprintf (global.debugfile," 00 sc/cl hd\n");
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fprintf (global.debugfile,"al ah bl bh cl ch dl dh si di cflgs flags\n");
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hexwrite ((byte *) ®s,16,global.debugfile);
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}
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if ((errorcode = regs.h.ah) != 0) return;
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geometry.heads = (dword) regs.h.dh + 1;
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geometry.sectors = (dword) regs.h.cl & 0x3f;
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geometry.cylinders = ((dword) regs.h.ch | (((dword) regs.h.cl << 2) & 0x300)) + 1;
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if (global.debug_mode)
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{
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fprintf (global.debugfile, "\nGeometry reported by BIOS:\n");
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fprintf
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(
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global.debugfile,
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"%ld cylinders, %ld heads, %ld sectors\n",
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geometry.cylinders,
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geometry.heads,
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geometry.sectors
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);
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}
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}
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void fips_harddrive::reset (void)
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{
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union REGS regs;
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regs.h.ah = RESET_DISK;
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regs.h.dl = number;
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int86 (DISK_INT,®s,®s);
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if (global.debug_mode)
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{
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fprintf (global.debugfile,"\nRegisters after call to int 13h 00h (drive %02Xh):\n\n",number);
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fprintf (global.debugfile,"al ah bl bh cl ch dl dh si di cflgs flags\n");
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hexwrite ((byte *) ®s,16,global.debugfile);
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}
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errorcode = regs.h.ah;
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}
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void fips_logdrive_info::put_debug_info (void)
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{
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fprintf (global.debugfile,"Calculated Partition Characteristica:\n\n");
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fprintf (global.debugfile,"Start of FAT 1: %lu\n",start_fat1);
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fprintf (global.debugfile,"Start of FAT 2: %lu\n",start_fat2);
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fprintf (global.debugfile,"Start of Rootdirectory: %lu\n",start_rootdir);
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fprintf (global.debugfile,"Start of Data: %lu\n",start_data);
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fprintf (global.debugfile,"Number of Clusters: %lu\n",no_of_clusters);
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}
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dword fips_partition::min_cylinder (fat16 fat, drive_geometry geometry)
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{
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dword new_part_min_sector =
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info().start_data
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+ (dword) 4085
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* bpb().sectors_per_cluster;
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dword new_part_min_cylinder =
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(
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new_part_min_sector
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+ partition_info->start_sector_abs
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- 1
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)
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/ (geometry.heads * geometry.sectors)
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+ 1;
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if (new_part_min_cylinder > partition_info->end_cylinder)
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error ("Partition too small - can't split");
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dword min_free_cluster = fat.min_free_cluster ();
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dword min_free_sector =
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info().start_data
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+ (min_free_cluster - 2)
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* (dword) bpb().sectors_per_cluster;
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dword min_free_cylinder =
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(
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min_free_sector
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+ partition_info->start_sector_abs
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- 1
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)
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/ (geometry.heads * geometry.sectors)
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+ 1;
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if (min_free_cylinder > partition_info->end_cylinder)
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error ("Last cylinder is not free");
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if (new_part_min_cylinder < min_free_cylinder)
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new_part_min_cylinder = min_free_cylinder;
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return (new_part_min_cylinder);
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}
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boolean fips_partition::split (fips_harddrive hd)
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{
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if (read_boot_sector ())
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error ("Error reading boot sector");
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if (global.debug_mode)
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{
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fprintf
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(
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global.debugfile,
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"\nBoot sector drive %02Xh, partition %u:\n\n",
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hd.number,
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number + 1
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);
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hexwrite
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(
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boot_sector->data,
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512,
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global.debugfile
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);
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}
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get_bpb ();
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printx ("\nBoot sector:\n\n");
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print_bpb ();
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get_info ();
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if (global.debug_mode)
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write_info_debugfile ();
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check ();
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fat16 fat1 (this,1);
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fat16 fat2 (this,2);
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fat1.check_against (&fat2);
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dword new_part_min_cylinder =
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min_cylinder (fat2, hd.geometry);
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if (ask_if_save()) save_root_and_boot(&hd,this);
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dword new_start_cylinder =
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ask_for_new_start_cylinder
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(
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partition_info->start_cylinder,
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new_part_min_cylinder,
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partition_info->end_cylinder,
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hd.geometry.heads * hd.geometry.sectors
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);
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fat2.check_empty
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(
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new_start_cylinder
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* hd.geometry.heads
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* hd.geometry.sectors
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- partition_info->start_sector_abs
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);
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hd.calculate_new_root (new_start_cylinder, this);
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hd.put_partition_table();
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hd.get_partition_table();
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printx ("\nNew partition table:\n\n");
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hd.print_partition_table ();
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hd.check (FINAL_CHECK);
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if (ask_if_continue () == false)
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{
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return (false);
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}
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calculate_new_boot ();
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put_bpb ();
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get_bpb ();
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printx ("\nNew boot sector:\n\n");
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print_bpb ();
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get_info ();
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if (global.debug_mode)
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write_info_debugfile ();
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check();
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if (!global.test_mode)
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{
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ask_for_write_permission ();
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if (hd.write_root_sector ())
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error ("Error writing root sector");
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if (write_boot_sector ())
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error ("Error writing boot sector");
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printx ("Repartitioning complete\n");
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}
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return (true);
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}
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