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1338 lines
32 KiB
1338 lines
32 KiB
/*++
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Copyright (c) 1991 Microsoft Corporation
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Module Name:
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parsboot.c
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Abstract:
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Parses the boot.ini file, displays a menu, and provides a kernel
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path and name to be passed to osloader.
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Author:
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John Vert (jvert) 22-Jul-1991
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Revision History:
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--*/
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#include "bldrx86.h"
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#include "msg.h"
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#include "ntdddisk.h"
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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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#define ENTER_KEY 0x0d
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#define MAX_SELECTIONS 10
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#define MAX_TITLE_LENGTH 71
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#define WIN95_DOS 1
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#define DOS_WIN95 2
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typedef struct _MENU_OPTION {
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PCHAR Title;
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PCHAR Path;
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BOOLEAN EnableDebug;
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ULONG MaxMemory;
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PCHAR LoadOptions;
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int ForcedScsiOrdinal;
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int Win95;
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} MENU_OPTION, *PMENU_OPTION;
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int ForcedScsiOrdinal = -1;
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//
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// Private function prototypes
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//
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VOID
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BlpRebootDOS(
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IN PCHAR BootSectorImage OPTIONAL
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);
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PCHAR
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BlpNextLine(
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IN PCHAR String
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);
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VOID
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BlpTranslateDosToArc(
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IN PCHAR DosName,
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OUT PCHAR ArcName
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);
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VOID
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BlpTruncateMemory(
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IN ULONG MaxMemory
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);
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ULONG
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BlpPresentMenu(
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IN PMENU_OPTION MenuOptions,
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IN ULONG NumberSelections,
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IN ULONG Default,
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IN LONG Timeout
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);
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PCHAR *
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BlpFileToLines(
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IN PCHAR File,
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OUT PULONG LineCount
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);
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PCHAR *
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BlpFindSection(
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IN PCHAR SectionName,
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IN PCHAR *BootFile,
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IN ULONG BootFileLines,
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OUT PULONG NumberLines
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);
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VOID
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BlpRenameWin95Files(
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IN ULONG DriveId,
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IN ULONG Type
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);
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PCHAR
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BlSelectKernel(
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IN ULONG DriveId,
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IN PCHAR BootFile,
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OUT PCHAR *LoadOptions,
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IN BOOLEAN UseTimeOut
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)
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/*++
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Routine Description:
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Parses the boot.txt file and determines the fully-qualified name of
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the kernel to be booted.
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Arguments:
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BootFile - Pointer to the beginning of the loaded boot.txt file
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Debugger - Returns the enable/disable state of the kernel debugger
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UseTimeOut - Supplies whether the boot menu should time out or not.
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Return Value:
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Pointer to the name of a kernel to boot.
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--*/
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{
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PCHAR *MbLines;
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PCHAR *OsLines;
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PCHAR *FileLines;
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#if DBG
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PCHAR *DebugLines;
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ULONG DebugLineCount;
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#endif
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ULONG FileLineCount;
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ULONG OsLineCount;
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ULONG MbLineCount;
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PCHAR pCurrent;
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PCHAR Option;
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MENU_OPTION MenuOption[MAX_SELECTIONS+1];
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ULONG NumberSystems=0;
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ULONG i;
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LONG Timeout;
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ULONG Selection;
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ULONG DefaultSelection=0;
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static CHAR Kernel[128];
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CHAR DosName[3];
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PCHAR DefaultPath="C:\\winnt\\";
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PCHAR DefaultTitle="NT (default)";
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PCHAR p;
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*LoadOptions = NULL;
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if (*BootFile == '\0') {
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//
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// No boot.ini file, so we boot the default.
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//
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BlPrint(BlFindMessage(BL_INVALID_BOOT_INI),DefaultPath);
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MenuOption[0].Path = DefaultPath;
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MenuOption[0].Title = DefaultTitle;
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MenuOption[0].MaxMemory = 0;
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MenuOption[0].LoadOptions = NULL;
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MenuOption[0].Win95 = 0;
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NumberSystems = 1;
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DefaultSelection = 0;
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MbLineCount = 0;
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OsLineCount = 0;
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MenuOption[0].EnableDebug = FALSE;
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#if DBG
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DebugLineCount = 0;
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#endif
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} else {
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FileLines = BlpFileToLines(BootFile, &FileLineCount);
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MbLines = BlpFindSection("[boot loader]",
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FileLines,
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FileLineCount,
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&MbLineCount);
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if (MbLines==NULL) {
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MbLines = BlpFindSection("[flexboot]",
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FileLines,
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FileLineCount,
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&MbLineCount);
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if (MbLines==NULL) {
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MbLines = BlpFindSection("[multiboot]",
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FileLines,
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FileLineCount,
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&MbLineCount);
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}
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}
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OsLines = BlpFindSection("[operating systems]",
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FileLines,
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FileLineCount,
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&OsLineCount);
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if (OsLineCount == 0) {
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BlPrint(BlFindMessage(BL_INVALID_BOOT_INI),DefaultPath);
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MenuOption[0].Path = DefaultPath;
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MenuOption[0].Title = DefaultTitle;
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MenuOption[0].MaxMemory = 0;
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MenuOption[0].LoadOptions = NULL;
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MenuOption[0].Win95 = 0;
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NumberSystems = 1;
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DefaultSelection = 0;
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}
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#if DBG
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DebugLines = BlpFindSection("[debug]",
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FileLines,
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FileLineCount,
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&DebugLineCount);
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#endif
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}
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//
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// Parse the [operating systems] section
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//
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for (i=0; i<OsLineCount; i++) {
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if (NumberSystems == MAX_SELECTIONS) {
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break;
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}
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pCurrent = OsLines[i];
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//
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// Throw away any leading whitespace
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//
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pCurrent += strspn(pCurrent, " \t");
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if (*pCurrent == '\0') {
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//
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// This is a blank line, so we just throw it away.
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//
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continue;
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}
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MenuOption[NumberSystems].Path = pCurrent;
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//
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// The first space or '=' character indicates the end of the
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// path specifier, so we need to replace it with a '\0'
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//
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while ((*pCurrent != ' ')&&
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(*pCurrent != '=')&&
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(*pCurrent != '\0')) {
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++pCurrent;
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}
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*pCurrent = '\0';
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//
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// The next character that is not space, equals, or double-quote
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// is the start of the title.
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//
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++pCurrent;
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while ((*pCurrent == ' ') ||
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(*pCurrent == '=') ||
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(*pCurrent == '"')) {
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++pCurrent;
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}
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if (pCurrent=='\0') {
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//
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// No title was found, so just use the path as the title.
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//
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MenuOption[NumberSystems].Title = MenuOption[NumberSystems].Path;
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} else {
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MenuOption[NumberSystems].Title = pCurrent;
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}
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//
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// The next character that is either a double-quote or a \0
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// indicates the end of the title.
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//
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while ((*pCurrent != '\0')&&
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(*pCurrent != '"')) {
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++pCurrent;
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}
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//
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// Look for a scsi(x) ordinal to use for opens on scsi ARC paths.
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// This spec must immediately follow the title and is not part
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// of the load options.
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//
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MenuOption[NumberSystems].ForcedScsiOrdinal = -1;
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if(p=strstr(pCurrent,"/SCSIORDINAL:")) {
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*pCurrent = 0;
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pCurrent = p + sizeof("/SCSIORDINAL:") - 1;
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MenuOption[NumberSystems].ForcedScsiOrdinal = atoi(pCurrent);
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// pCurrent is adjusted adequately for the code that follows.
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}
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//
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// If there is a DEBUG parameter after the description, then
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// we need to pass the DEBUG option to the osloader.
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//
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MenuOption[NumberSystems].MaxMemory=0;
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MenuOption[NumberSystems].EnableDebug = FALSE;
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MenuOption[NumberSystems].LoadOptions = NULL;
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MenuOption[NumberSystems].Win95 = 0;
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if (strchr(pCurrent,'/') != NULL) {
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*pCurrent = '\0';
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pCurrent = strchr(pCurrent+1,'/');
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MenuOption[NumberSystems].LoadOptions = pCurrent;
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_strupr(pCurrent);
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if (pCurrent != NULL) {
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if (Option = strstr(pCurrent,"/MAXMEM")) {
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MenuOption[NumberSystems].MaxMemory = atoi(Option+8);
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}
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if (strstr(pCurrent, "/WIN95DOS")) {
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MenuOption[NumberSystems].Win95 = WIN95_DOS;
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} else if (strstr(pCurrent, "/WIN95")) {
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MenuOption[NumberSystems].Win95 = DOS_WIN95;
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}
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//
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// As long as /nodebug is specified, this is NO debug system
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// If /NODEBUG is not specified, and either one of the
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// DEBUGPORT or BAUDRATE is specified, this is debug system.
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//
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if (strstr(pCurrent, "/NODEBUG") == NULL) {
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if (strstr(pCurrent, "/DEBUG") ||
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strstr(pCurrent, "/BAUDRATE")) {
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if (_stricmp(MenuOption[NumberSystems].Path, "C:\\")==0) {
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MenuOption[NumberSystems].EnableDebug = FALSE;
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} else {
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MenuOption[NumberSystems].EnableDebug = TRUE;
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}
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}
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}
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}
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} else {
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*pCurrent = '\0';
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}
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++NumberSystems;
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}
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//
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// Set default timeout value
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//
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if (UseTimeOut) {
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Timeout = 0;
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} else {
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Timeout = -1;
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}
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//
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// Parse the [boot loader] section
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//
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for (i=0; i<MbLineCount; i++) {
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pCurrent = MbLines[i];
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//
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// Throw away any leading whitespace
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//
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pCurrent += strspn(pCurrent, " \t");
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if (*pCurrent == '\0') {
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//
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// This is a blank line, so we just throw it away.
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//
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continue;
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}
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//
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// Check for "timeout" line
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//
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if (_strnicmp(pCurrent,"timeout",7) == 0) {
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pCurrent = strchr(pCurrent,'=');
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if (pCurrent != NULL) {
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if (UseTimeOut) {
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Timeout = atoi(++pCurrent);
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}
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}
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}
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//
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// Check for "default" line
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//
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else if (_strnicmp(pCurrent,"default",7) == 0) {
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pCurrent = strchr(pCurrent,'=');
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if (pCurrent != NULL) {
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DefaultPath = ++pCurrent;
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DefaultPath += strspn(DefaultPath," \t");
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}
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}
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}
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#if DBG
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//
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// Parse the [debug] section
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//
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for (i=0; i<DebugLineCount; i++) {
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extern ULONG ScsiDebug;
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pCurrent = DebugLines[i];
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//
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// Throw away leading whitespace
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//
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pCurrent += strspn(pCurrent, " \t");
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if (*pCurrent == '\0') {
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//
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// throw away blank lines
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//
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continue;
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}
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if (_strnicmp(pCurrent,"scsidebug",9) == 0) {
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pCurrent = strchr(pCurrent,'=');
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if (pCurrent != NULL) {
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ScsiDebug = atoi(++pCurrent);
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}
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}
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}
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#endif
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//
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// Now look for a Title entry from the [operating systems] section
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// that matches the default entry from the [multiboot] section. This
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// will give us a title. If no entry matches, we will add an entry
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// at the end of the list and provide a default Title.
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//
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i=0;
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while (_stricmp(MenuOption[i].Path,DefaultPath) != 0) {
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++i;
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if (i==NumberSystems) {
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//
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// Create a default entry in the Title and Path arrays
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//
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MenuOption[NumberSystems].Path = DefaultPath;
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MenuOption[NumberSystems].Title = DefaultTitle;
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MenuOption[NumberSystems].EnableDebug = FALSE;
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MenuOption[NumberSystems].MaxMemory = 0;
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MenuOption[NumberSystems].LoadOptions = NULL;
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MenuOption[NumberSystems].Win95 = 0;
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++NumberSystems;
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}
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}
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DefaultSelection = i;
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//
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// Display the menu of choices
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//
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TextClearDisplay();
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TextSetCursorPosition(0,0);
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Selection = BlpPresentMenu( MenuOption,
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NumberSystems,
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DefaultSelection,
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Timeout);
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if (MenuOption[Selection].Win95) {
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BlpRenameWin95Files( DriveId, MenuOption[Selection].Win95 );
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}
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if (_strnicmp(MenuOption[Selection].Path,"C:\\",3) == 0) {
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//
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// This syntax means that we are booting a root-based os
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// from an alternate boot sector image.
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// If no file name is specified, BlpRebootDos will default to
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// \bootsect.dos.
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//
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BlpRebootDOS(MenuOption[Selection].Path[3] ? &MenuOption[Selection].Path[2] : NULL);
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//
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// If this returns, it means that the file does not exist as a bootsector.
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// This allows c:\winnt35 to work as a boot path specifier as opposed to
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// a boot sector image filename specifier.
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//
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}
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if (MenuOption[Selection].Path[1]==':') {
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//
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// We need to translate the DOS name into an ARC name
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//
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DosName[0] = MenuOption[Selection].Path[0];
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DosName[1] = MenuOption[Selection].Path[1];
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DosName[2] = '\0';
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BlpTranslateDosToArc(DosName,Kernel);
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strcat(Kernel,MenuOption[Selection].Path+2);
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} else {
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strcpy(Kernel,MenuOption[Selection].Path);
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}
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pCurrent = MenuOption[Selection].LoadOptions;
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if (pCurrent != NULL) {
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//
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// Remove '/' from LoadOptions string.
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//
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*LoadOptions = pCurrent + 1;
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while (*pCurrent != '\0') {
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if (*pCurrent == '/') {
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*pCurrent = ' ';
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}
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++pCurrent;
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}
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} else {
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*LoadOptions = NULL;
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}
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//
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// Make sure there is no trailing slash
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//
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if (Kernel[strlen(Kernel)-1] == '\\') {
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Kernel[strlen(Kernel)-1] = '\0';
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}
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|
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//
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// If MaxMemory is not zero, adjust the memory descriptors to eliminate
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// memory above the boundary line
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//
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BlpTruncateMemory(MenuOption[Selection].MaxMemory);
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ForcedScsiOrdinal = MenuOption[Selection].ForcedScsiOrdinal;
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return(Kernel);
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}
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|
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|
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PCHAR *
|
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BlpFileToLines(
|
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IN PCHAR File,
|
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OUT PULONG LineCount
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)
|
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|
|
/*++
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|
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Routine Description:
|
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|
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This routine converts the loaded BOOT.INI file into an array of
|
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pointers to NULL-terminated ASCII strings.
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|
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Arguments:
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File - supplies a pointer to the in-memory image of the BOOT.INI file.
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This will be converted in place by turning CR/LF pairs into
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null terminators.
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LineCount - Returns the number of lines in the BOOT.INI file.
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Return Value:
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A pointer to an array of pointers to ASCIIZ strings. The array will
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have LineCount elements.
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NULL if the function did not succeed for some reason.
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|
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--*/
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|
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{
|
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ULONG Line;
|
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PCHAR *LineArray;
|
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PCHAR p;
|
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PCHAR Space;
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|
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p = File;
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|
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//
|
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// First count the number of lines in the file so we know how large
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// an array to allocate.
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//
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*LineCount=1;
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while (*p != '\0') {
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p=strchr(p, '\n');
|
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if (p==NULL) {
|
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break;
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}
|
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++p;
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|
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//
|
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// See if there's any text following the CR/LF.
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//
|
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if (*p=='\0') {
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break;
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}
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|
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*LineCount += 1;
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}
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|
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LineArray = BlAllocateHeap(*LineCount * sizeof(PCHAR));
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|
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//
|
|
// Now step through the file again, replacing CR/LF with \0\0 and
|
|
// filling in the array of pointers.
|
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//
|
|
p=File;
|
|
for (Line=0; Line < *LineCount; Line++) {
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LineArray[Line] = p;
|
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p=strchr(p, '\r');
|
|
if (p != NULL) {
|
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*p = '\0';
|
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++p;
|
|
if (*p=='\n') {
|
|
*p = '\0';
|
|
++p;
|
|
}
|
|
} else {
|
|
p=strchr(LineArray[Line], '\n');
|
|
if (p != NULL) {
|
|
*p = '\0';
|
|
++p;
|
|
}
|
|
}
|
|
|
|
//
|
|
// remove trailing white space
|
|
//
|
|
Space = LineArray[Line] + strlen(LineArray[Line])-1;
|
|
while ((*Space == ' ') || (*Space == '\t')) {
|
|
*Space = '\0';
|
|
--Space;
|
|
}
|
|
}
|
|
|
|
return(LineArray);
|
|
}
|
|
|
|
|
|
PCHAR *
|
|
BlpFindSection(
|
|
IN PCHAR SectionName,
|
|
IN PCHAR *BootFile,
|
|
IN ULONG BootFileLines,
|
|
OUT PULONG NumberLines
|
|
)
|
|
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
Finds a section ([multiboot], [operating systems], etc) in the boot.ini
|
|
file and returns a pointer to its first line. The search will be
|
|
case-insensitive.
|
|
|
|
Arguments:
|
|
|
|
SectionName - Supplies the name of the section. No brackets.
|
|
|
|
BootFile - Supplies the array of pointers to lines of the ini file.
|
|
|
|
BootFileLines - Supplies the number of lines in the ini file.
|
|
|
|
NumberLines - Returns the number of lines in the section.
|
|
|
|
Return Value:
|
|
|
|
Pointer to an array of ASCIIZ strings, one entry per line.
|
|
|
|
NULL, if the section was not found.
|
|
|
|
--*/
|
|
|
|
{
|
|
ULONG cnt;
|
|
ULONG StartLine;
|
|
|
|
for (cnt=0; cnt<BootFileLines; cnt++) {
|
|
|
|
//
|
|
// Check to see if this is the line we are looking for
|
|
//
|
|
if (_stricmp(BootFile[cnt],SectionName) == 0) {
|
|
|
|
//
|
|
// found it
|
|
//
|
|
break;
|
|
}
|
|
}
|
|
if (cnt==BootFileLines) {
|
|
//
|
|
// We ran out of lines, never found the right section.
|
|
//
|
|
*NumberLines = 0;
|
|
return(NULL);
|
|
}
|
|
|
|
StartLine = cnt+1;
|
|
|
|
//
|
|
// Find end of section
|
|
//
|
|
for (cnt=StartLine; cnt<BootFileLines; cnt++) {
|
|
if (BootFile[cnt][0] == '[') {
|
|
break;
|
|
}
|
|
}
|
|
|
|
*NumberLines = cnt-StartLine;
|
|
|
|
return(&BootFile[StartLine]);
|
|
}
|
|
|
|
PCHAR
|
|
BlpNextLine(
|
|
IN PCHAR String
|
|
)
|
|
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
Finds the beginning of the next text line
|
|
|
|
Arguments:
|
|
|
|
String - Supplies a pointer to a null-terminated string
|
|
|
|
Return Value:
|
|
|
|
Pointer to the character following the first CR/LF found in String
|
|
|
|
- or -
|
|
|
|
NULL - No CR/LF found before the end of the string.
|
|
|
|
--*/
|
|
|
|
{
|
|
PCHAR p;
|
|
|
|
p=strchr(String, '\n');
|
|
if (p==NULL) {
|
|
return(p);
|
|
}
|
|
|
|
++p;
|
|
|
|
//
|
|
// If there is no text following the CR/LF, there is no next line
|
|
//
|
|
if (*p=='\0') {
|
|
return(NULL);
|
|
} else {
|
|
return(p);
|
|
}
|
|
}
|
|
|
|
VOID
|
|
BlpRebootDOS(
|
|
IN PCHAR BootSectorImage OPTIONAL
|
|
)
|
|
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
Loads up the bootstrap sectors and executes them (thereby rebooting
|
|
into DOS or OS/2)
|
|
|
|
Arguments:
|
|
|
|
BootSectorImage - If specified, supplies name of file on the C: drive
|
|
that contains the boot sector image. In this case, this routine
|
|
will return if that file cannot be opened (for example, if it's
|
|
a directory). If not specified, then default to \bootsect.dos,
|
|
and this routine will never return.
|
|
|
|
Return Value:
|
|
|
|
None.
|
|
|
|
--*/
|
|
|
|
{
|
|
ULONG SectorId;
|
|
ARC_STATUS Status;
|
|
ULONG Read;
|
|
ULONG DriveId;
|
|
ULONG BootType;
|
|
LARGE_INTEGER SeekPosition;
|
|
extern UCHAR BootPartitionName[];
|
|
|
|
//
|
|
// HACKHACK John Vert (jvert)
|
|
// Some SCSI drives get really confused and return zeroes when
|
|
// you use the BIOS to query their size after the AHA driver has
|
|
// initialized. This can completely tube OS/2 or DOS. So here
|
|
// we try and open both BIOS-accessible hard drives. Our open
|
|
// code is smart enough to retry if it gets back zeros, so hopefully
|
|
// this will give the SCSI drives a chance to get their act together.
|
|
//
|
|
Status = ArcOpen("multi(0)disk(0)rdisk(0)partition(0)",
|
|
ArcOpenReadOnly,
|
|
&DriveId);
|
|
if (Status == ESUCCESS) {
|
|
ArcClose(DriveId);
|
|
}
|
|
|
|
Status = ArcOpen("multi(0)disk(0)rdisk(1)partition(0)",
|
|
ArcOpenReadOnly,
|
|
&DriveId);
|
|
if (Status == ESUCCESS) {
|
|
ArcClose(DriveId);
|
|
}
|
|
|
|
//
|
|
// Load the boot sector at address 0x7C00 (expected by Reboot callback)
|
|
//
|
|
Status = ArcOpen(BootPartitionName,
|
|
ArcOpenReadOnly,
|
|
&DriveId);
|
|
if (Status != ESUCCESS) {
|
|
BlPrint(BlFindMessage(BL_REBOOT_IO_ERROR),BootPartitionName);
|
|
while (1) {
|
|
GET_KEY();
|
|
}
|
|
}
|
|
Status = BlOpen( DriveId,
|
|
BootSectorImage ? BootSectorImage : "\\bootsect.dos",
|
|
ArcOpenReadOnly,
|
|
&SectorId );
|
|
|
|
if (Status != ESUCCESS) {
|
|
if(BootSectorImage) {
|
|
//
|
|
// The boot sector image might actually be a directory.
|
|
// Return to the caller to attempt standard boot.
|
|
//
|
|
BlClose(DriveId);
|
|
return;
|
|
}
|
|
BlPrint(BlFindMessage(BL_REBOOT_IO_ERROR),BootPartitionName);
|
|
while (1) {
|
|
}
|
|
}
|
|
|
|
Status = BlRead( SectorId,
|
|
(PVOID)0x7c00,
|
|
SECTOR_SIZE,
|
|
&Read );
|
|
|
|
if (Status != ESUCCESS) {
|
|
BlPrint(BlFindMessage(BL_REBOOT_IO_ERROR),BootPartitionName);
|
|
while (1) {
|
|
}
|
|
}
|
|
|
|
//
|
|
// The FAT boot code is only one sector long so we just want
|
|
// to load it up and jump to it.
|
|
//
|
|
// For HPFS and NTFS, we can't do this because the first sector
|
|
// loads the rest of the boot sectors -- but we want to use
|
|
// the boot code in the boot sector image file we loaded.
|
|
//
|
|
// For HPFS, we load the first 20 sectors (boot code + super and
|
|
// space blocks) into d00:200. Fortunately this works for both
|
|
// NT and OS/2.
|
|
//
|
|
// For NTFS, we load the first 16 sectors and jump to d00:256.
|
|
// If the OEM field of the boot sector starts with NTFS, we
|
|
// assume it's NTFS boot code.
|
|
//
|
|
|
|
//
|
|
// Try to read 8K from the boot code image.
|
|
// If this succeeds, we have either HPFS or NTFS.
|
|
//
|
|
SeekPosition.QuadPart = 0;
|
|
BlSeek(SectorId,&SeekPosition,SeekAbsolute);
|
|
BlRead(SectorId,(PVOID)0xd000,SECTOR_SIZE*16,&Read);
|
|
|
|
if(Read == SECTOR_SIZE*16) {
|
|
|
|
if(memcmp((PVOID)0x7c03,"NTFS",4)) {
|
|
|
|
//
|
|
// HPFS -- we need to load the super block.
|
|
//
|
|
BootType = 1; // HPFS
|
|
|
|
SeekPosition.QuadPart = 16*SECTOR_SIZE;
|
|
ArcSeek(DriveId,&SeekPosition,SeekAbsolute);
|
|
ArcRead(DriveId,(PVOID)0xf000,SECTOR_SIZE*4,&Read);
|
|
|
|
} else {
|
|
|
|
//
|
|
// NTFS -- we've loaded everything we need to load.
|
|
//
|
|
BootType = 2; // NTFS
|
|
}
|
|
} else {
|
|
|
|
BootType = 0; // FAT
|
|
}
|
|
|
|
//
|
|
// DX must be the drive to boot from
|
|
//
|
|
|
|
_asm {
|
|
mov dx, 0x80
|
|
}
|
|
REBOOT(BootType);
|
|
|
|
}
|
|
|
|
|
|
ULONG
|
|
BlpPresentMenu(
|
|
IN PMENU_OPTION MenuOption,
|
|
IN ULONG NumberSelections,
|
|
IN ULONG Default,
|
|
IN LONG Timeout
|
|
)
|
|
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
Displays the menu of boot options and allows the user to select one
|
|
by using the arrow keys.
|
|
|
|
Arguments:
|
|
|
|
MenuOption - Supplies array of menu options
|
|
|
|
NumberSelections - Supplies the number of entries in the MenuOption array.
|
|
|
|
Default - Supplies the index of the default operating system choice.
|
|
|
|
Timeout - Supplies the timeout (in seconds) before the highlighted
|
|
operating system choice is booted. If this value is -1,
|
|
the menu will never timeout.
|
|
|
|
Return Value:
|
|
|
|
ULONG - The index of the operating system choice selected.
|
|
|
|
--*/
|
|
|
|
{
|
|
ULONG i;
|
|
ULONG Selection;
|
|
ULONG StartTime;
|
|
ULONG LastTime;
|
|
ULONG BiasTime=0;
|
|
ULONG CurrentTime;
|
|
LONG SecondsLeft;
|
|
ULONG EndTime;
|
|
ULONG Key;
|
|
ULONG MaxLength;
|
|
ULONG CurrentLength;
|
|
PCHAR SelectOs;
|
|
PCHAR MoveHighlight;
|
|
PCHAR TimeoutCountdown;
|
|
PCHAR EnabledKd;
|
|
PCHAR p;
|
|
BOOLEAN Moved;
|
|
|
|
//
|
|
// Get the strings we'll need to display.
|
|
//
|
|
SelectOs = BlFindMessage(BL_SELECT_OS);
|
|
MoveHighlight = BlFindMessage(BL_MOVE_HIGHLIGHT);
|
|
TimeoutCountdown = BlFindMessage(BL_TIMEOUT_COUNTDOWN);
|
|
EnabledKd = BlFindMessage(BL_ENABLED_KD_TITLE);
|
|
if ((SelectOs == NULL) ||
|
|
(MoveHighlight == NULL) ||
|
|
(EnabledKd == NULL) ||
|
|
(TimeoutCountdown==NULL)) {
|
|
|
|
return(Default);
|
|
}
|
|
|
|
p=strchr(TimeoutCountdown,'\r');
|
|
if (p!=NULL) {
|
|
*p='\0';
|
|
}
|
|
p=strchr(EnabledKd,'\r');
|
|
if (p!=NULL) {
|
|
*p='\0';
|
|
}
|
|
|
|
if (NumberSelections<=1) {
|
|
|
|
//
|
|
// No menu if there's only one choice.
|
|
//
|
|
|
|
return(0);
|
|
}
|
|
if (Timeout==0) {
|
|
|
|
//
|
|
// If the timeout is zero, immediately boot the default
|
|
//
|
|
|
|
return(Default);
|
|
}
|
|
|
|
//
|
|
// Find the longest string in the selections, so we know how long to
|
|
// make the highlight bar.
|
|
//
|
|
|
|
MaxLength=0;
|
|
for (i=0; i<NumberSelections; i++) {
|
|
CurrentLength = strlen(MenuOption[i].Title);
|
|
if (MenuOption[i].EnableDebug == TRUE) {
|
|
CurrentLength += strlen(EnabledKd);
|
|
}
|
|
if (CurrentLength > MAX_TITLE_LENGTH) {
|
|
//
|
|
// This title is too long to fit on one line, so we have to
|
|
// truncate it.
|
|
//
|
|
if (MenuOption[i].EnableDebug == TRUE) {
|
|
MenuOption[i].Title[MAX_TITLE_LENGTH - strlen(EnabledKd)] = '\0';
|
|
} else {
|
|
MenuOption[i].Title[MAX_TITLE_LENGTH] = '\0';
|
|
}
|
|
CurrentLength = MAX_TITLE_LENGTH;
|
|
}
|
|
if (CurrentLength > MaxLength) {
|
|
MaxLength = CurrentLength;
|
|
}
|
|
}
|
|
|
|
Selection = Default;
|
|
StartTime = GET_COUNTER();
|
|
EndTime = StartTime + (Timeout * 182) / 10;
|
|
BlPrint("OS Loader V4.00\n");
|
|
TextSetCurrentAttribute(0x07);
|
|
Moved = TRUE;
|
|
do {
|
|
TextSetCursorPosition(0,2);
|
|
BlPrint(SelectOs);
|
|
|
|
if(Moved) {
|
|
for (i=0; i<NumberSelections; i++) {
|
|
TextSetCursorPosition(0,5+i);
|
|
if (i==Selection) {
|
|
TextFillAttribute(0x70,MaxLength+8);
|
|
TextSetCurrentAttribute(0x70);
|
|
}
|
|
BlPrint( " %s", MenuOption[i].Title);
|
|
|
|
if (MenuOption[i].EnableDebug == TRUE) {
|
|
BlPrint(EnabledKd);
|
|
}
|
|
TextSetCurrentAttribute(0x07);
|
|
}
|
|
Moved = FALSE;
|
|
} else {
|
|
TextSetCursorPosition(0,5+NumberSelections-1);
|
|
}
|
|
BlPrint(MoveHighlight);
|
|
if (Timeout != -1) {
|
|
LastTime = CurrentTime;
|
|
CurrentTime = GET_COUNTER();
|
|
|
|
//
|
|
// deal with wraparound at midnight
|
|
// We can't do it the easy way because there are not exactly
|
|
// 18.2 * 60 * 60 * 24 tics/day. (just approximately)
|
|
//
|
|
if (CurrentTime < StartTime) {
|
|
if (BiasTime == 0) {
|
|
BiasTime = LastTime + 1;
|
|
}
|
|
CurrentTime += BiasTime;
|
|
}
|
|
BlPrint(TimeoutCountdown);
|
|
|
|
SecondsLeft = ((LONG)(EndTime - CurrentTime) * 10) / 182;
|
|
|
|
if (SecondsLeft < 0) {
|
|
|
|
//
|
|
// Note that if the user hits the PAUSE key, the counter stops
|
|
// and, as a result, SecondsLeft can become < 0.
|
|
//
|
|
|
|
SecondsLeft = 0;
|
|
}
|
|
|
|
BlPrint(" %d \n",SecondsLeft);
|
|
} else {
|
|
BlPrint(" \n");
|
|
}
|
|
|
|
//
|
|
// Poll for a key stroke. Any key disables the countdown
|
|
// timer.
|
|
//
|
|
|
|
Key = GET_KEY();
|
|
if (Key != 0) {
|
|
Timeout = -1;
|
|
}
|
|
|
|
if ( (Key==UP_ARROW) ||
|
|
(Key==DOWN_ARROW) ||
|
|
(Key==HOME_KEY) ||
|
|
(Key==END_KEY)
|
|
) {
|
|
Moved = TRUE;
|
|
TextSetCursorPosition(0,5+Selection);
|
|
TextFillAttribute(0x07,MaxLength+8);
|
|
if (Key==DOWN_ARROW) {
|
|
Selection = (Selection+1) % NumberSelections;
|
|
} else if (Key==UP_ARROW) {
|
|
Selection = (Selection == 0) ? (NumberSelections-1)
|
|
: (Selection - 1);
|
|
} else if (Key==HOME_KEY) {
|
|
Selection = 0;
|
|
} else if (Key==END_KEY) {
|
|
Selection = NumberSelections-1;
|
|
}
|
|
}
|
|
|
|
} while ( ((Key&(ULONG)0xff) != ENTER_KEY) &&
|
|
((CurrentTime < EndTime) || (Timeout == -1)) );
|
|
|
|
return(Selection);
|
|
}
|
|
|
|
|
|
|
|
VOID
|
|
BlpTruncateMemory(
|
|
IN ULONG MaxMemory
|
|
)
|
|
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
Eliminates all the memory descriptors above a given boundary
|
|
|
|
Arguments:
|
|
|
|
MaxMemory - Supplies the maximum memory boundary in megabytes
|
|
|
|
Return Value:
|
|
|
|
None.
|
|
|
|
--*/
|
|
|
|
{
|
|
extern MEMORY_DESCRIPTOR MDArray[];
|
|
extern ULONG NumberDescriptors;
|
|
ULONG Current = 0;
|
|
ULONG MaxPage = MaxMemory * 256; // Convert Mb to pages
|
|
|
|
if (MaxMemory == 0) {
|
|
return;
|
|
}
|
|
|
|
while (Current < NumberDescriptors) {
|
|
if (MDArray[Current].BasePage >= MaxPage) {
|
|
//
|
|
// This memory descriptor lies entirely above the boundary,
|
|
// eliminate it.
|
|
//
|
|
RtlMoveMemory(MDArray+Current,
|
|
MDArray+Current+1,
|
|
sizeof(MEMORY_DESCRIPTOR)*
|
|
(NumberDescriptors-Current-1));
|
|
--NumberDescriptors;
|
|
} else if (MDArray[Current].BasePage + MDArray[Current].PageCount > MaxPage) {
|
|
//
|
|
// This memory descriptor crosses the boundary, truncate it.
|
|
//
|
|
MDArray[Current].PageCount = MaxPage - MDArray[Current].BasePage;
|
|
++Current;
|
|
} else {
|
|
//
|
|
// This one's ok, keep it.
|
|
//
|
|
++Current;
|
|
}
|
|
}
|
|
|
|
|
|
}
|
|
|
|
ARC_STATUS
|
|
BlpRenameWin95SystemFile(
|
|
IN ULONG DriveId,
|
|
IN ULONG Type,
|
|
IN PCHAR FileName,
|
|
IN PCHAR Ext,
|
|
IN PCHAR NewName
|
|
)
|
|
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
Renames a file from one name to another.
|
|
|
|
Arguments:
|
|
|
|
DriveId - Open drive identifier
|
|
Type - WIN95_DOS or DOS_WIN95
|
|
FileName - Base file name
|
|
Ext - Base extension
|
|
NewName - Non-NULL value causes an override of a generated name
|
|
|
|
Return Value:
|
|
|
|
Arc status of the failed opperation or E_SUCCESS.
|
|
|
|
--*/
|
|
|
|
{
|
|
ARC_STATUS Status;
|
|
ULONG FileId;
|
|
ULONG FileIdCur;
|
|
CHAR Fname[16];
|
|
CHAR FnameCur[16];
|
|
CHAR FnameNew[16];
|
|
|
|
|
|
if (Type == WIN95_DOS) {
|
|
sprintf( Fname, "%s.dos", FileName );
|
|
} else {
|
|
if (NewName) {
|
|
strcpy( Fname, NewName );
|
|
} else {
|
|
sprintf( Fname, "%s.w40", FileName );
|
|
}
|
|
}
|
|
|
|
Status = BlOpen(
|
|
DriveId,
|
|
Fname,
|
|
ArcOpenReadOnly,
|
|
&FileId
|
|
);
|
|
if (Status != ESUCCESS) {
|
|
return Status;
|
|
}
|
|
|
|
sprintf( FnameCur, "%s.%s", FileName, Ext );
|
|
|
|
Status = BlOpen(
|
|
DriveId,
|
|
FnameCur,
|
|
ArcOpenReadOnly,
|
|
&FileIdCur
|
|
);
|
|
if (Status != ESUCCESS) {
|
|
BlClose( FileId );
|
|
return Status;
|
|
}
|
|
|
|
if (Type == WIN95_DOS) {
|
|
if (NewName) {
|
|
strcpy( FnameNew, NewName );
|
|
} else {
|
|
sprintf( FnameNew, "%s.w40", FileName );
|
|
}
|
|
} else {
|
|
sprintf( FnameNew, "%s.dos", FileName );
|
|
}
|
|
|
|
Status = BlRename(
|
|
FileIdCur,
|
|
FnameNew
|
|
);
|
|
|
|
BlClose( FileIdCur );
|
|
|
|
if (Status != ESUCCESS) {
|
|
BlClose( FileId );
|
|
return Status;
|
|
}
|
|
|
|
Status = BlRename(
|
|
FileId,
|
|
FnameCur
|
|
);
|
|
|
|
BlClose( FileId );
|
|
|
|
return Status;
|
|
}
|
|
|
|
|
|
VOID
|
|
BlpRenameWin95Files(
|
|
IN ULONG DriveId,
|
|
IN ULONG Type
|
|
)
|
|
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
Renames all Windows 95 system files from either their
|
|
Win95 DOS names to their Win95 name or the reverse.
|
|
|
|
Arguments:
|
|
|
|
DriveId - Open drive identifier
|
|
Type - 1=dos to win95, 2=win95 to dos
|
|
|
|
Return Value:
|
|
|
|
None.
|
|
|
|
--*/
|
|
|
|
{
|
|
BlpRenameWin95SystemFile( DriveId, Type, "command", "com", NULL );
|
|
BlpRenameWin95SystemFile( DriveId, Type, "msdos", "sys", NULL );
|
|
BlpRenameWin95SystemFile( DriveId, Type, "io", "sys", "winboot.sys" );
|
|
BlpRenameWin95SystemFile( DriveId, Type, "autoexec", "bat", NULL );
|
|
BlpRenameWin95SystemFile( DriveId, Type, "config", "sys", NULL );
|
|
}
|