add directory Minix
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361
Minix/1.7.5/DOSUTILS/FIPS/SOURCE/CHECK.CPP
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361
Minix/1.7.5/DOSUTILS/FIPS/SOURCE/CHECK.CPP
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/*
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FIPS - the First nondestructive Interactive Partition Splitting program
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Module check.cpp
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RCS - Header:
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$Header: c:/daten/fips/source/main/RCS/check.cpp 1.4 1995/01/19 00:20:41 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 <stdlib.h>
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#include "hdstruct.h"
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#include "global.h"
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#include "fipsspec.h"
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#include "input.h"
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/* ----------------------------------------------------------------------- */
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/* Consistency check of root sector / partition table */
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/* ----------------------------------------------------------------------- */
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void fips_partition_table::correct_physical (const drive_geometry &geometry)
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{
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for (int i = 0; i < 4; i++)
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{
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if (partition_info[i].system)
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{
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physical_sector_no start
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(
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partition_info[i].start_sector_abs,
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geometry
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);
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partition_info[i].start_cylinder = start.cylinder;
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partition_info[i].start_head = start.head;
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partition_info[i].start_sector = start.sector;
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// recalculate 'physical' start sector
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physical_sector_no end
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(
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partition_info[i].start_sector_abs
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+ partition_info[i].no_of_sectors_abs
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- 1,
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geometry
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);
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partition_info[i].end_cylinder = end.cylinder;
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partition_info[i].end_head = end.head;
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partition_info[i].end_sector = end.sector;
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// recalculate 'physical' end sector
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}
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}
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}
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void fips_harddrive::check (boolean final_check)
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{
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int i,j,k;
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boolean bootable = false;
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boolean do_correct = false;
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byte *root_sector = harddrive::root_sector->data;
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partition_info *parts = partition_table().partition_info;
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int order[4] = {-1,-1,-1,-1};
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printx ("\nChecking root sector ... ");
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if ((root_sector[510] != 0x55) || (root_sector[511] != 0xaa))
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error ("Invalid root sector signature: %02X %02X", root_sector[510], root_sector[511]);
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for (i = 0; i < 4; i++)
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{
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if (parts[i].bootable == 0x80)
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{
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if (bootable)
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{
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warning (false, "More than one active partition");
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printx ("Continue (y/n)? ");
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if (ask_yes_no () == 'n') exit (-1);
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}
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else bootable = true;
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}
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else if (parts[i].bootable != 0)
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{
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warning (false, "Invalid active flag: partition %u: %02Xh",i+1,parts[i].bootable);
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// must be 0 or 80h
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printx ("Do you want to set the flag to zero (y/n)? ");
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if (ask_yes_no () == 'y') parts[i].bootable = 0;
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}
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if (parts[i].system)
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{
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if ((parts[i].start_sector == 0) || (parts[i].start_sector > geometry.sectors))
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{
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if (final_check)
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error ("Calculation error: Invalid start sector partition %u: %u", i + 1, parts[i].start_sector);
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infomsg ("Partition table inconsistency");
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do_correct = true;
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}
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if ((parts[i].end_sector == 0) || (parts[i].end_sector > geometry.sectors))
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{
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if (final_check)
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error ("Calculation error: Invalid end sector partition %u: %u", i + 1, parts[i].end_sector);
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if (!do_correct)
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{
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infomsg ("Partition table inconsistency");
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do_correct = true;
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}
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}
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if
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(
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(parts[i].start_head > (geometry.heads - 1)) ||
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(parts[i].end_head > (geometry.heads - 1)) ||
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(parts[i].start_sector_abs !=
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(parts[i].start_cylinder * geometry.heads * geometry.sectors +
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parts[i].start_head * geometry.sectors + parts[i].start_sector - 1)) ||
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// physical start sector does not match logical start sector
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((parts[i].start_sector_abs + parts[i].no_of_sectors_abs - 1) !=
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(parts[i].end_cylinder * geometry.heads * geometry.sectors +
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parts[i].end_head * geometry.sectors + parts[i].end_sector - 1))
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// physical end sector does not match logical end sector
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)
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{
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if (final_check)
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error ("Calculation error: Inconsistent table entry for partition %u", i + 1);
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if (!do_correct)
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{
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infomsg ("Partition table inconsistency");
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do_correct = true;
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}
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}
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for (j = 0; j < 4; j++) // insert partition in ordered table
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{
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if (order[j] == -1)
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{
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order[j] = i;
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break;
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}
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else if (parts[i].start_sector_abs < parts[order[j]].start_sector_abs)
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{
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for (k=3;k>j;k--) order[k] = order[k-1];
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order[j] = i;
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break;
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}
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}
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}
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else // system = 0
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{
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for (j = 0; j < 16; j++)
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{
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if (root_sector[0x1be + 16 * i + j] != 0)
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{
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warning (false, "Invalid partition entry: partition %u", i+1);
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printx ("Do you want to delete this entry (y/n)? ");
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if (ask_yes_no () == 'y')
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{
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parts[i].bootable = 0;
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parts[i].start_head = 0;
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parts[i].start_cylinder = 0;
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parts[i].start_sector = 0;
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parts[i].end_head = 0;
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parts[i].end_cylinder = 0;
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parts[i].end_sector = 0;
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parts[i].start_sector_abs = 0;
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parts[i].no_of_sectors_abs = 0;
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}
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break;
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}
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}
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}
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}
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if (do_correct)
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{
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pr_partition_table.correct_physical (geometry);
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printx ("\nPartition table adapted to the current drive geometry:\n\n");
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pr_partition_table.print();
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}
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if (!bootable && number == 0x80) warning (true, "No active partition");
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for (i = 0; i < 4; i++)
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{
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if ((k = order[i]) != -1) // valid partition
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{
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if ((parts[k].end_sector != geometry.sectors) || (parts[k].end_head != (geometry.heads - 1)))
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warning (true, "Partition does not end on cylinder boundary: partition %u", k + 1);
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if (i != 0) if ((parts[k].start_sector != 1) || (parts[k].start_head != 0))
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warning (true, "Partition does not begin on cylinder boundary: partition %u", k + 1);
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if (i < 3) if ((j = order[i + 1]) != -1) // following valid partition
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{
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if ((parts[k].start_sector_abs + parts[k].no_of_sectors_abs) > parts[j].start_sector_abs)
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error ("Overlapping partitions: %u and %u", k + 1, j + 1);
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if ((parts[k].start_sector_abs + parts[k].no_of_sectors_abs) < parts[j].start_sector_abs)
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warning (true, "Free space between partitions: %u and %u", k + 1, j + 1);
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}
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}
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}
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printx ("OK\n");
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}
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void fips_partition::check (void)
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{
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printx ("Checking boot sector ... ");
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byte *boot_sector = partition::boot_sector->data;
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if (boot_sector[0] == 0xeb)
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{
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if (boot_sector[2] != 0x90)
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error ("Invalid jump instruction in boot sector: %02X %02X %02X", boot_sector[0], boot_sector[1], boot_sector[2]);
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}
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else if (boot_sector[0] != 0xe9)
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error ("Invalid jump instruction in boot sector: %02X %02X %02X", boot_sector[0], boot_sector[1], boot_sector[2]);
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if ((boot_sector[510] != 0x55) || (boot_sector[511] != 0xaa))
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error ("Invalid boot sector: %02X %02X", boot_sector[510], boot_sector[511]);
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if (bpb().bytes_per_sector != 512)
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error ("Can't handle number of bytes per sector: %u",bpb().bytes_per_sector);
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switch (bpb().sectors_per_cluster)
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{
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case 1:case 2:case 4:case 8:case 16:case 32:case 64:case 128: break;
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default:
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error ("Number of sectors per cluster must be a power of 2: actually it is %u",bpb().sectors_per_cluster);
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}
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if (bpb().reserved_sectors != 1)
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{
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warning (false, "Number of reserved sectors should be 1: actually it is %u",bpb().reserved_sectors);
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if (ask_correction () == 'y') bpb().reserved_sectors = 1;
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}
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if (bpb().no_of_fats != 2)
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error ("Partition must have 2 FATs: actually it has %u",bpb().no_of_fats);
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if (bpb().no_of_rootdir_entries % 16)
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{
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warning (false, "Number of root directory entries must be multiple of 16: actually it is %u",bpb().no_of_rootdir_entries);
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printx ("Do you want to set the number to the next multiple of 16 (y/n)? ");
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if (ask_yes_no () == 'y')
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bpb().no_of_rootdir_entries += (16 - bpb().no_of_rootdir_entries % 16);
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}
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if (bpb().no_of_rootdir_entries == 0)
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error ("Number of root directory entries must not be zero");
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if (bpb().media_descriptor != 0xf8)
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{
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warning (false, "Wrong media descriptor byte in boot sector: %02X",bpb().media_descriptor);
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if (ask_correction () == 'y') bpb().media_descriptor = 0xf8;
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}
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if (bpb().sectors_per_fat > 256)
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{
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warning (false, "FAT too large: %u sectors",bpb().sectors_per_fat);
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printx ("Continue (y/n)? ");
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if (ask_yes_no () == 'n') exit (-1);
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}
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if (bpb().sectors_per_fat < (info().no_of_clusters + 1) / 256 + 1)
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{
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warning (false, "FAT too small: %u sectors (should be %u)",bpb().sectors_per_fat, (unsigned int) ((info().no_of_clusters + 1) / 256 + 1));
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printx ("Continue (y/n)? ");
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if (ask_yes_no () == 'n') exit (-1);
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}
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if (bpb().sectors_per_track != drive->geometry.sectors)
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{
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warning (false, "Sectors per track incorrect: %u instead of %u",bpb().sectors_per_track,(int) drive->geometry.sectors);
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if (ask_correction () == 'y') bpb().sectors_per_track = drive->geometry.sectors;
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}
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if (bpb().drive_heads != drive->geometry.heads)
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{
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warning (false, "Number of drive heads incorrect: %u instead of %u",bpb().drive_heads,(int) drive->geometry.heads);
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if (ask_correction () == 'y') bpb().drive_heads = drive->geometry.heads;
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}
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if (bpb().hidden_sectors != partition_info->start_sector_abs)
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error ("Number of hidden sectors incorrect: %lu instead of %lu",bpb().hidden_sectors,partition_info->start_sector_abs);
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if (info().no_of_clusters <= 4084)
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error ("12-bit FAT not supported: number of clusters is %u",(int) info().no_of_clusters);
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if (bpb().no_of_sectors)
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{
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if (partition_info->no_of_sectors_abs > 0xffff)
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error ("Number of sectors (short) must be zero");
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if (bpb().no_of_sectors != partition_info->no_of_sectors_abs)
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error ("Number of sectors (short) does not match partition info:\n%u instead of %lu",bpb().no_of_sectors,partition_info->no_of_sectors_abs);
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if (partition_info->system != 4)
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{
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warning (true, "Wrong system indicator byte: %u instead of 4",partition_info->system);
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if (ask_correction () == 'y') partition_info->system = 4;
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}
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}
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else
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{
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if (bpb().no_of_sectors_long != partition_info->no_of_sectors_abs)
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error ("Number of sectors (long) does not match partition info:\n%lu instead of %lu",bpb().no_of_sectors_long,partition_info->no_of_sectors_abs);
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if (bpb().signature != 0x29)
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{
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warning (false, "Wrong signature: %02Xh",bpb().signature);
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if (ask_correction () == 'y') bpb().signature = 0x29;
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}
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if (partition_info->system != 6)
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{
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warning (true, "Wrong system indicator byte: %u instead of 6",partition_info->system);
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if (ask_correction () == 'y') partition_info->system = 6;
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}
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}
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printx ("OK\n");
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}
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