517 lines
12 KiB
C
517 lines
12 KiB
C
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/*++
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Copyright (c) 1995 Microsoft Corporation
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Module Name:
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vdm.c
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Abstract:
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Routines to configure the MS-DOS subsystem.
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Author:
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Ted Miller (tedm) 27-Apr-1995
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Revision History:
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--*/
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#include "setupp.h"
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#pragma hdrstop
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//
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// Keywords whose presence in config.sys indicate OS/2.
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//
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PCSTR Os2ConfigSysKeywords[] = { "DISKCACHE", "LIBPATH", "PAUSEONERROR",
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"RMSIZE", "RUN", "SWAPPATH",
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"IOPL", "MAXWAIT", "MEMMAN",
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"PRIORITY", "PROTSHELL", "PROTECTONLY",
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"THREADS", "TIMESLICE", "TRACE",
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"TRACEBUF", "DEVINFO", NULL
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};
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//
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// Keywords we migrate from the user's existing DOS config.sys
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// into config.nt.
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//
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#define NUM_DOS_KEYWORDS 4
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PCSTR DosConfigSysKeywords[NUM_DOS_KEYWORDS] = { "FCBS","BREAK","LASTDRIVE","FILES" };
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BOOL
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DosConfigSysExists(
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IN PCWSTR Filename
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);
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BOOL
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CreateConfigNt(
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IN PCWSTR ConfigDos,
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IN PCWSTR ConfigTmp,
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IN PCWSTR ConfigNt
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);
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PSTR
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IsolateFirstField(
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IN PSTR Line,
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OUT PSTR *End,
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OUT PCHAR Terminator
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);
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BOOL
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ConfigureMsDosSubsystem(
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VOID
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)
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/*++
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Routine Description:
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Configure the 16-bit MS-DOS subsystem.
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Currently this means creating config.nt and autoexec.nt.
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It also means creating empty config.sys, autoexec.bat, io.sys and msdos.sys
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if these files don't already exist.
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On the upgrade, the only thing that we do is to create the empty files,
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if they don't already exist.
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Arguments:
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None.
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Return Value:
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Boolean value indicating outcome.
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--*/
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{
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WCHAR ConfigDos[] = L"?:\\CONFIG.SYS";
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WCHAR ConfigTmp[MAX_PATH];
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WCHAR ConfigNt[MAX_PATH];
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WCHAR AutoexecDos[] = L"?:\\AUTOEXEC.BAT";
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WCHAR AutoexecTmp[MAX_PATH];
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WCHAR AutoexecNt[MAX_PATH];
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WCHAR IoSysFile[] = L"?:\\IO.SYS";
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WCHAR MsDosSysFile[] = L"?:\\MSDOS.SYS";
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WCHAR ControlIniFile[MAX_PATH];
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BOOL b;
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DWORD Result;
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ULONG i;
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HANDLE FileHandle;
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PWSTR DosFileNames[] = {
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ConfigDos,
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AutoexecDos,
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IoSysFile,
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MsDosSysFile,
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ControlIniFile
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};
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DWORD DosFileAttributes[] = {
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FILE_ATTRIBUTE_NORMAL,
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FILE_ATTRIBUTE_NORMAL,
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FILE_ATTRIBUTE_SYSTEM | FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_READONLY,
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FILE_ATTRIBUTE_SYSTEM | FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_READONLY,
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FILE_ATTRIBUTE_NORMAL
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};
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//
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// Fill in drive letter of system partition.
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//
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#ifdef _X86_
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ConfigDos[0] = x86SystemPartitionDrive;
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AutoexecDos[0] = x86SystemPartitionDrive;
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IoSysFile[0] = x86SystemPartitionDrive;
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MsDosSysFile[0] = x86SystemPartitionDrive;
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#else
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ConfigDos[0] = L'C';
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AutoexecDos[0] = L'C';
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IoSysFile[0] = L'C';
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MsDosSysFile[0] = L'C';
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#endif
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//
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// Build path to control.ini file
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//
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Result = GetWindowsDirectory(ControlIniFile,MAX_PATH);
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if( Result == 0) {
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MYASSERT(FALSE);
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return FALSE;
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}
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pSetupConcatenatePaths(ControlIniFile,L"control.ini",MAX_PATH,NULL);
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//
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// Create empty config.sys, autoexec.bat, io.sys, msdos.sys and control.ini
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// if they don't exist. This is because some 16-bit apps depend on
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// these files and SudeepB wants this moved from VDM to setup.
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//
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for( i = 0; i < sizeof( DosFileNames ) / sizeof( PWSTR ); i++ ) {
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FileHandle = CreateFile( DosFileNames[i],
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GENERIC_READ | GENERIC_WRITE,
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0, // File is not to be shared
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NULL, // No security attributes
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CREATE_NEW, // Create only if it doesn't exist
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DosFileAttributes[i],
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NULL ); // No extended attributes
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if( FileHandle != INVALID_HANDLE_VALUE ) {
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CloseHandle( FileHandle );
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}
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}
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if( Upgrade ) {
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return( TRUE );
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}
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//
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// Form filenames.
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//
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GetSystemDirectory(ConfigTmp,MAX_PATH);
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lstrcpy(ConfigNt,ConfigTmp);
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lstrcpy(AutoexecNt,ConfigTmp);
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lstrcpy(AutoexecTmp,ConfigTmp);
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pSetupConcatenatePaths(ConfigTmp,L"CONFIG.TMP",MAX_PATH,NULL);
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pSetupConcatenatePaths(ConfigNt,L"CONFIG.NT",MAX_PATH,NULL);
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pSetupConcatenatePaths(AutoexecTmp,L"AUTOEXEC.TMP",MAX_PATH,NULL);
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pSetupConcatenatePaths(AutoexecNt,L"AUTOEXEC.NT",MAX_PATH,NULL);
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//
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// If the temp files don't exist, we're done.
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// If they do, set their attributes so that we can delete them later.
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//
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if(!FileExists(ConfigTmp,NULL) || !FileExists(AutoexecTmp,NULL)) {
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return(TRUE);
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}
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SetFileAttributes(ConfigTmp,FILE_ATTRIBUTE_NORMAL);
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SetFileAttributes(AutoexecTmp,FILE_ATTRIBUTE_NORMAL);
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//
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// Get rid of any existing nt config files. We don't support
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// merging/upgrading them; we support only ooverwriting them.
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//
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SetFileAttributes(ConfigNt,FILE_ATTRIBUTE_NORMAL);
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SetFileAttributes(AutoexecNt,FILE_ATTRIBUTE_NORMAL);
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DeleteFile(ConfigNt);
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DeleteFile(AutoexecNt);
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//
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// If a DOS config.sys exists, merge the template config.sys
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// and the dos config.sys to form the nt config.sys.
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// Otherwise move the config.sys template over to be the
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// nt config file.
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//
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if(DosConfigSysExists(ConfigDos)) {
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b = CreateConfigNt(ConfigDos,ConfigTmp,ConfigNt);
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} else {
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b = MoveFile(ConfigTmp,ConfigNt);
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}
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//
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// We don't do anything special with autoexec.bat.
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// Just move the template over to be the nt file.
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//
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if(!MoveFile(AutoexecTmp,AutoexecNt)) {
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b = FALSE;
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}
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return(b);
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}
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BOOL
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DosConfigSysExists(
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IN PCWSTR Filename
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)
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/*++
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Routine Description:
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Determine whether a given file is a DOS config.sys.
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Arguments:
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Filename - supplies name of file to check.
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Return Value:
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TRUE if the file exists and is not an OS/2 config.sys.
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FALSE if the file does not exist or is an OS/2 config.sys.
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--*/
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{
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BOOL b;
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FILE *f;
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CHAR Line[512];
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UINT i;
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PCHAR p;
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CHAR c;
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PSTR End;
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PSTR filename;
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filename = pSetupUnicodeToAnsi(Filename);
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if(!filename) {
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return(FALSE);
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}
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b = FALSE;
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if(FileExists(Filename,NULL)) {
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b = TRUE;
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if(f = fopen(filename,"rt")) {
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while(b && fgets(Line,sizeof(Line),f)) {
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if(p = IsolateFirstField(Line,&End,&c)) {
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for(i=0; b && Os2ConfigSysKeywords[i]; i++) {
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if(!lstrcmpiA(p,Os2ConfigSysKeywords[i])) {
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b = FALSE;
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}
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}
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}
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}
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fclose(f);
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}
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}
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MyFree(filename);
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return(b);
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}
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BOOL
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CreateConfigNt(
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IN PCWSTR ConfigDos,
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IN PCWSTR ConfigTmp,
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IN PCWSTR ConfigNt
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)
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/*++
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Routine Description:
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Create config.nt. This is done by merging config.tmp (copied during setup)
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and the user's existing DOS config.sys. We migrate certain lines from
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the DOS config.sys into config.nt.
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Arguments:
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ConfigDos - supplies filename of DOS config.sys.
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ConfigTmp - supplies filename of template config.sys.
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ConfigNt - supplies filename of config.nt to be created.
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Return Value:
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Boolean value indicating outcome.
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--*/
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{
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FILE *DosFile;
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FILE *NtFile;
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FILE *TmpFile;
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BOOL b;
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CHAR Line[512];
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PCHAR p;
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BOOL Found;
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BOOL SawKeyword[NUM_DOS_KEYWORDS];
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PCSTR FoundKeyword[NUM_DOS_KEYWORDS];
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PSTR FoundLine[NUM_DOS_KEYWORDS];
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UINT KeywordsFound;
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CHAR c;
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PSTR End;
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PCSTR configDos,configTmp,configNt;
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UINT i;
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//
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// Open the dos file for reading.
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// Create the nt file for writing.
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// Open the template file for reading.
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//
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b = FALSE;
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if(configDos = pSetupUnicodeToAnsi(ConfigDos)) {
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DosFile = fopen(configDos,"rt");
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MyFree(configDos);
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if(!DosFile) {
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goto err0;
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}
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} else {
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goto err0;
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}
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if(configNt = pSetupUnicodeToAnsi(ConfigNt)) {
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NtFile = fopen(configNt,"wt");
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MyFree(configNt);
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if(!NtFile) {
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goto err1;
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}
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} else {
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goto err1;
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}
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if(configTmp = pSetupUnicodeToAnsi(ConfigTmp)) {
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TmpFile = fopen(configTmp,"rt");
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MyFree(configTmp);
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if(!TmpFile) {
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goto err2;
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}
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} else {
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goto err2;
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}
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//
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// Process the DOS file. Read each line and see if it's one
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// we care about. If so, save it for later.
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//
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ZeroMemory(SawKeyword,sizeof(SawKeyword));
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KeywordsFound = 0;
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while(fgets(Line,sizeof(Line),DosFile)) {
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//
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// Isolate the first field.
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//
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if(p = IsolateFirstField(Line,&End,&c)) {
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//
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// See if we care about this line.
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//
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for(i=0; i<NUM_DOS_KEYWORDS; i++) {
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if(!SawKeyword[i] && !lstrcmpiA(p,DosConfigSysKeywords[i])) {
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//
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// Remember that we saw this line and save away
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// the rest of the line for later.
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//
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*End = c;
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SawKeyword[i] = TRUE;
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FoundKeyword[KeywordsFound] = DosConfigSysKeywords[i];
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FoundLine[KeywordsFound] = MyMalloc(lstrlenA(p)+1);
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if(!FoundLine[KeywordsFound]) {
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goto err3;
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}
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lstrcpyA(FoundLine[KeywordsFound],p);
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KeywordsFound++;
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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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//
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// Look at each line in the template file.
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// If it's a line with a value we respect, make sure the line
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// does not exist in the DOS file. If it exists in the DOS file
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// use the DOS value instead.
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//
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while(fgets(Line,sizeof(Line),TmpFile)) {
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//
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||
|
|
// Isolate the first field in the template line and
|
||
|
|
// check against those we found in the DOS file.
|
||
|
|
//
|
||
|
|
Found = FALSE;
|
||
|
|
if(p = IsolateFirstField(Line,&End,&c)) {
|
||
|
|
for(i=0; i<KeywordsFound; i++) {
|
||
|
|
if(!lstrcmpiA(FoundKeyword[i],p)) {
|
||
|
|
Found = TRUE;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
*End = c;
|
||
|
|
if(Found) {
|
||
|
|
//
|
||
|
|
// Use value we found in the dos file.
|
||
|
|
//
|
||
|
|
fputs(FoundLine[i],NtFile);
|
||
|
|
} else {
|
||
|
|
//
|
||
|
|
// Use line from template file as-is.
|
||
|
|
//
|
||
|
|
fputs(Line,NtFile);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
b = TRUE;
|
||
|
|
|
||
|
|
err3:
|
||
|
|
for(i=0; i<KeywordsFound; i++) {
|
||
|
|
MyFree(FoundLine[i]);
|
||
|
|
}
|
||
|
|
fclose(TmpFile);
|
||
|
|
err2:
|
||
|
|
fclose(NtFile);
|
||
|
|
err1:
|
||
|
|
fclose(DosFile);
|
||
|
|
err0:
|
||
|
|
return(b);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
PSTR
|
||
|
|
IsolateFirstField(
|
||
|
|
IN PSTR Line,
|
||
|
|
OUT PSTR *End,
|
||
|
|
OUT PCHAR Terminator
|
||
|
|
)
|
||
|
|
|
||
|
|
/*++
|
||
|
|
|
||
|
|
Routine Description:
|
||
|
|
|
||
|
|
Isolate the first token in a line of config.sys. The first field
|
||
|
|
starts at the first non-space/tab character, and is terminated
|
||
|
|
by a space/tab, newline, or equals.
|
||
|
|
|
||
|
|
Arguments:
|
||
|
|
|
||
|
|
Line - supplies pointer to line whose first field is desired.
|
||
|
|
|
||
|
|
End - receives a pointer to the character that termianted the first
|
||
|
|
field. That character will have been overwritten with a nul byte.
|
||
|
|
|
||
|
|
Terminator - receives the character that terminated the first field,
|
||
|
|
before we overwrote it with a nul byte.
|
||
|
|
|
||
|
|
Return Value:
|
||
|
|
|
||
|
|
Pointer to the first field. If the line is blank, the return value
|
||
|
|
will be NULL.
|
||
|
|
|
||
|
|
--*/
|
||
|
|
|
||
|
|
{
|
||
|
|
PSTR p,q;
|
||
|
|
|
||
|
|
//
|
||
|
|
// Get start of first field.
|
||
|
|
//
|
||
|
|
p = Line;
|
||
|
|
while((*p == ' ') || (*p == '\t')) {
|
||
|
|
p++;
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// If line is empty or bogus, we're done.
|
||
|
|
//
|
||
|
|
if((*p == 0) || (*p == '\r') || (*p == '\n') || (*p == '=')) {
|
||
|
|
return(NULL);
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Find end of field.
|
||
|
|
//
|
||
|
|
q = p;
|
||
|
|
while(*q && !strchr("\r\n \t=",*q)) {
|
||
|
|
q++;
|
||
|
|
}
|
||
|
|
*End = q;
|
||
|
|
*Terminator = *q;
|
||
|
|
*q = 0;
|
||
|
|
|
||
|
|
return(p);
|
||
|
|
}
|