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Sweden-Number/dlls/kernel32/file.c

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/*
* File handling functions
*
* Copyright 1993 John Burton
* Copyright 1996, 2004 Alexandre Julliard
* Copyright 2008 Jeff Zaroyko
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <stdarg.h>
#include <stdio.h>
#include <errno.h>
#define NONAMELESSUNION
#define NONAMELESSSTRUCT
#include "winerror.h"
#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "windef.h"
#include "winbase.h"
#include "winternl.h"
#include "winioctl.h"
#include "wincon.h"
#include "ddk/ntddk.h"
#include "kernel_private.h"
#include "fileapi.h"
#include "shlwapi.h"
#include "wine/exception.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(file);
/***********************************************************************
* create_file_OF
*
* Wrapper for CreateFile that takes OF_* mode flags.
*/
static HANDLE create_file_OF( LPCSTR path, INT mode )
{
DWORD access, sharing, creation;
if (mode & OF_CREATE)
{
creation = CREATE_ALWAYS;
access = GENERIC_READ | GENERIC_WRITE;
}
else
{
creation = OPEN_EXISTING;
switch(mode & 0x03)
{
case OF_READ: access = GENERIC_READ; break;
case OF_WRITE: access = GENERIC_WRITE; break;
case OF_READWRITE: access = GENERIC_READ | GENERIC_WRITE; break;
default: access = 0; break;
}
}
switch(mode & 0x70)
{
case OF_SHARE_EXCLUSIVE: sharing = 0; break;
case OF_SHARE_DENY_WRITE: sharing = FILE_SHARE_READ; break;
case OF_SHARE_DENY_READ: sharing = FILE_SHARE_WRITE; break;
case OF_SHARE_DENY_NONE:
case OF_SHARE_COMPAT:
default: sharing = FILE_SHARE_READ | FILE_SHARE_WRITE; break;
}
return CreateFileA( path, access, sharing, NULL, creation, FILE_ATTRIBUTE_NORMAL, 0 );
}
/***********************************************************************
* FILE_name_AtoW
*
* Convert a file name to Unicode, taking into account the OEM/Ansi API mode.
*
* If alloc is FALSE uses the TEB static buffer, so it can only be used when
* there is no possibility for the function to do that twice, taking into
* account any called function.
*/
WCHAR *FILE_name_AtoW( LPCSTR name, BOOL alloc )
{
ANSI_STRING str;
UNICODE_STRING strW, *pstrW;
NTSTATUS status;
RtlInitAnsiString( &str, name );
pstrW = alloc ? &strW : &NtCurrentTeb()->StaticUnicodeString;
if (!AreFileApisANSI())
status = RtlOemStringToUnicodeString( pstrW, &str, alloc );
else
status = RtlAnsiStringToUnicodeString( pstrW, &str, alloc );
if (status == STATUS_SUCCESS) return pstrW->Buffer;
if (status == STATUS_BUFFER_OVERFLOW)
SetLastError( ERROR_FILENAME_EXCED_RANGE );
else
SetLastError( RtlNtStatusToDosError(status) );
return NULL;
}
/***********************************************************************
* FILE_name_WtoA
*
* Convert a file name back to OEM/Ansi. Returns number of bytes copied.
*/
DWORD FILE_name_WtoA( LPCWSTR src, INT srclen, LPSTR dest, INT destlen )
{
DWORD ret;
if (srclen < 0) srclen = lstrlenW( src ) + 1;
if (!destlen)
{
if (!AreFileApisANSI())
{
UNICODE_STRING strW;
strW.Buffer = (WCHAR *)src;
strW.Length = srclen * sizeof(WCHAR);
ret = RtlUnicodeStringToOemSize( &strW ) - 1;
}
else
RtlUnicodeToMultiByteSize( &ret, src, srclen * sizeof(WCHAR) );
}
else
{
if (!AreFileApisANSI())
RtlUnicodeToOemN( dest, destlen, &ret, src, srclen * sizeof(WCHAR) );
else
RtlUnicodeToMultiByteN( dest, destlen, &ret, src, srclen * sizeof(WCHAR) );
}
return ret;
}
/***********************************************************************
* _hread (KERNEL32.@)
*/
LONG WINAPI _hread( HFILE hFile, LPVOID buffer, LONG count)
{
return _lread( hFile, buffer, count );
}
/***********************************************************************
* _hwrite (KERNEL32.@)
*
* experimentation yields that _lwrite:
* o truncates the file at the current position with
* a 0 len write
* o returns 0 on a 0 length write
* o works with console handles
*
*/
LONG WINAPI _hwrite( HFILE handle, LPCSTR buffer, LONG count )
{
DWORD result;
TRACE("%d %p %d\n", handle, buffer, count );
if (!count)
{
/* Expand or truncate at current position */
if (!SetEndOfFile( LongToHandle(handle) )) return HFILE_ERROR;
return 0;
}
if (!WriteFile( LongToHandle(handle), buffer, count, &result, NULL ))
return HFILE_ERROR;
return result;
}
/***********************************************************************
* _lclose (KERNEL32.@)
*/
HFILE WINAPI _lclose( HFILE hFile )
{
TRACE("handle %d\n", hFile );
return CloseHandle( LongToHandle(hFile) ) ? 0 : HFILE_ERROR;
}
/***********************************************************************
* _lcreat (KERNEL32.@)
*/
HFILE WINAPI _lcreat( LPCSTR path, INT attr )
{
HANDLE hfile;
/* Mask off all flags not explicitly allowed by the doc */
attr &= FILE_ATTRIBUTE_READONLY | FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM;
TRACE("%s %02x\n", path, attr );
hfile = CreateFileA( path, GENERIC_READ | GENERIC_WRITE,
FILE_SHARE_READ | FILE_SHARE_WRITE, NULL,
CREATE_ALWAYS, attr, 0 );
return HandleToLong(hfile);
}
/***********************************************************************
* _lopen (KERNEL32.@)
*/
HFILE WINAPI _lopen( LPCSTR path, INT mode )
{
HANDLE hfile;
TRACE("(%s,%04x)\n", debugstr_a(path), mode );
hfile = create_file_OF( path, mode & ~OF_CREATE );
return HandleToLong(hfile);
}
/***********************************************************************
* _lread (KERNEL32.@)
*/
UINT WINAPI _lread( HFILE handle, LPVOID buffer, UINT count )
{
DWORD result;
if (!ReadFile( LongToHandle(handle), buffer, count, &result, NULL ))
return HFILE_ERROR;
return result;
}
/***********************************************************************
* _llseek (KERNEL32.@)
*/
LONG WINAPI _llseek( HFILE hFile, LONG lOffset, INT nOrigin )
{
return SetFilePointer( LongToHandle(hFile), lOffset, NULL, nOrigin );
}
/***********************************************************************
* _lwrite (KERNEL32.@)
*/
UINT WINAPI _lwrite( HFILE hFile, LPCSTR buffer, UINT count )
{
return (UINT)_hwrite( hFile, buffer, (LONG)count );
}
/**************************************************************************
* SetFileCompletionNotificationModes (KERNEL32.@)
*/
BOOL WINAPI SetFileCompletionNotificationModes( HANDLE file, UCHAR flags )
{
FILE_IO_COMPLETION_NOTIFICATION_INFORMATION info;
IO_STATUS_BLOCK io;
info.Flags = flags;
return set_ntstatus( NtSetInformationFile( file, &io, &info, sizeof(info),
FileIoCompletionNotificationInformation ));
}
/*************************************************************************
* SetHandleCount (KERNEL32.@)
*/
UINT WINAPI SetHandleCount( UINT count )
{
return count;
}
/***********************************************************************
* DosDateTimeToFileTime (KERNEL32.@)
*/
BOOL WINAPI DosDateTimeToFileTime( WORD fatdate, WORD fattime, FILETIME *ft )
{
TIME_FIELDS fields;
LARGE_INTEGER time;
fields.Year = (fatdate >> 9) + 1980;
fields.Month = ((fatdate >> 5) & 0x0f);
fields.Day = (fatdate & 0x1f);
fields.Hour = (fattime >> 11);
fields.Minute = (fattime >> 5) & 0x3f;
fields.Second = (fattime & 0x1f) * 2;
fields.Milliseconds = 0;
if (!RtlTimeFieldsToTime( &fields, &time )) return FALSE;
ft->dwLowDateTime = time.u.LowPart;
ft->dwHighDateTime = time.u.HighPart;
return TRUE;
}
/***********************************************************************
* FileTimeToDosDateTime (KERNEL32.@)
*/
BOOL WINAPI FileTimeToDosDateTime( const FILETIME *ft, WORD *fatdate, WORD *fattime )
{
TIME_FIELDS fields;
LARGE_INTEGER time;
if (!fatdate || !fattime)
{
SetLastError( ERROR_INVALID_PARAMETER );
return FALSE;
}
time.u.LowPart = ft->dwLowDateTime;
time.u.HighPart = ft->dwHighDateTime;
RtlTimeToTimeFields( &time, &fields );
if (fields.Year < 1980)
{
SetLastError( ERROR_INVALID_PARAMETER );
return FALSE;
}
*fattime = (fields.Hour << 11) + (fields.Minute << 5) + (fields.Second / 2);
*fatdate = ((fields.Year - 1980) << 9) + (fields.Month << 5) + fields.Day;
return TRUE;
}
/**************************************************************************
* Operations on file names *
**************************************************************************/
/**************************************************************************
* ReplaceFileA (KERNEL32.@)
*/
BOOL WINAPI ReplaceFileA(LPCSTR lpReplacedFileName,LPCSTR lpReplacementFileName,
LPCSTR lpBackupFileName, DWORD dwReplaceFlags,
LPVOID lpExclude, LPVOID lpReserved)
{
WCHAR *replacedW, *replacementW, *backupW = NULL;
BOOL ret;
/* This function only makes sense when the first two parameters are defined */
if (!lpReplacedFileName || !(replacedW = FILE_name_AtoW( lpReplacedFileName, TRUE )))
{
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
if (!lpReplacementFileName || !(replacementW = FILE_name_AtoW( lpReplacementFileName, TRUE )))
{
HeapFree( GetProcessHeap(), 0, replacedW );
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
/* The backup parameter, however, is optional */
if (lpBackupFileName)
{
if (!(backupW = FILE_name_AtoW( lpBackupFileName, TRUE )))
{
HeapFree( GetProcessHeap(), 0, replacedW );
HeapFree( GetProcessHeap(), 0, replacementW );
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
}
ret = ReplaceFileW( replacedW, replacementW, backupW, dwReplaceFlags, lpExclude, lpReserved );
HeapFree( GetProcessHeap(), 0, replacedW );
HeapFree( GetProcessHeap(), 0, replacementW );
HeapFree( GetProcessHeap(), 0, backupW );
return ret;
}
/***********************************************************************
* OpenVxDHandle (KERNEL32.@)
*
* This function is supposed to return the corresponding Ring 0
* ("kernel") handle for a Ring 3 handle in Win9x.
* Evidently, Wine will have problems with this. But we try anyway,
* maybe it helps...
*/
HANDLE WINAPI OpenVxDHandle(HANDLE hHandleRing3)
{
FIXME( "(%p), stub! (returning Ring 3 handle instead of Ring 0)\n", hHandleRing3);
return hHandleRing3;
}
/****************************************************************************
* DeviceIoControl (KERNEL32.@)
*/
BOOL WINAPI DeviceIoControl(HANDLE hDevice, DWORD dwIoControlCode,
LPVOID lpvInBuffer, DWORD cbInBuffer,
LPVOID lpvOutBuffer, DWORD cbOutBuffer,
LPDWORD lpcbBytesReturned,
LPOVERLAPPED lpOverlapped)
{
NTSTATUS status;
TRACE( "(%p,%x,%p,%d,%p,%d,%p,%p)\n",
hDevice,dwIoControlCode,lpvInBuffer,cbInBuffer,
lpvOutBuffer,cbOutBuffer,lpcbBytesReturned,lpOverlapped );
/* Check if this is a user defined control code for a VxD */
if (HIWORD( dwIoControlCode ) == 0 && (GetVersion() & 0x80000000))
{
typedef BOOL (WINAPI *DeviceIoProc)(DWORD, LPVOID, DWORD, LPVOID, DWORD, LPDWORD, LPOVERLAPPED);
static DeviceIoProc (*vxd_get_proc)(HANDLE);
DeviceIoProc proc = NULL;
if (!vxd_get_proc) vxd_get_proc = (void *)GetProcAddress( GetModuleHandleW(L"krnl386.exe16"),
"__wine_vxd_get_proc" );
if (vxd_get_proc) proc = vxd_get_proc( hDevice );
if (proc) return proc( dwIoControlCode, lpvInBuffer, cbInBuffer,
lpvOutBuffer, cbOutBuffer, lpcbBytesReturned, lpOverlapped );
}
/* Not a VxD, let ntdll handle it */
if (lpOverlapped)
{
LPVOID cvalue = ((ULONG_PTR)lpOverlapped->hEvent & 1) ? NULL : lpOverlapped;
lpOverlapped->Internal = STATUS_PENDING;
lpOverlapped->InternalHigh = 0;
if (HIWORD(dwIoControlCode) == FILE_DEVICE_FILE_SYSTEM)
status = NtFsControlFile(hDevice, lpOverlapped->hEvent,
NULL, cvalue, (PIO_STATUS_BLOCK)lpOverlapped,
dwIoControlCode, lpvInBuffer, cbInBuffer,
lpvOutBuffer, cbOutBuffer);
else
status = NtDeviceIoControlFile(hDevice, lpOverlapped->hEvent,
NULL, cvalue, (PIO_STATUS_BLOCK)lpOverlapped,
dwIoControlCode, lpvInBuffer, cbInBuffer,
lpvOutBuffer, cbOutBuffer);
if (lpcbBytesReturned) *lpcbBytesReturned = lpOverlapped->InternalHigh;
}
else
{
IO_STATUS_BLOCK iosb;
if (HIWORD(dwIoControlCode) == FILE_DEVICE_FILE_SYSTEM)
status = NtFsControlFile(hDevice, NULL, NULL, NULL, &iosb,
dwIoControlCode, lpvInBuffer, cbInBuffer,
lpvOutBuffer, cbOutBuffer);
else
status = NtDeviceIoControlFile(hDevice, NULL, NULL, NULL, &iosb,
dwIoControlCode, lpvInBuffer, cbInBuffer,
lpvOutBuffer, cbOutBuffer);
if (lpcbBytesReturned) *lpcbBytesReturned = iosb.Information;
}
return set_ntstatus( status );
}
/***********************************************************************
* OpenFile (KERNEL32.@)
*/
HFILE WINAPI OpenFile( LPCSTR name, OFSTRUCT *ofs, UINT mode )
{
HANDLE handle;
FILETIME filetime;
WORD filedatetime[2];
DWORD len;
if (!ofs) return HFILE_ERROR;
TRACE("%s %s %s %s%s%s%s%s%s%s%s%s\n",name,
((mode & 0x3 )==OF_READ)?"OF_READ":
((mode & 0x3 )==OF_WRITE)?"OF_WRITE":
((mode & 0x3 )==OF_READWRITE)?"OF_READWRITE":"unknown",
((mode & 0x70 )==OF_SHARE_COMPAT)?"OF_SHARE_COMPAT":
((mode & 0x70 )==OF_SHARE_DENY_NONE)?"OF_SHARE_DENY_NONE":
((mode & 0x70 )==OF_SHARE_DENY_READ)?"OF_SHARE_DENY_READ":
((mode & 0x70 )==OF_SHARE_DENY_WRITE)?"OF_SHARE_DENY_WRITE":
((mode & 0x70 )==OF_SHARE_EXCLUSIVE)?"OF_SHARE_EXCLUSIVE":"unknown",
((mode & OF_PARSE )==OF_PARSE)?"OF_PARSE ":"",
((mode & OF_DELETE )==OF_DELETE)?"OF_DELETE ":"",
((mode & OF_VERIFY )==OF_VERIFY)?"OF_VERIFY ":"",
((mode & OF_SEARCH )==OF_SEARCH)?"OF_SEARCH ":"",
((mode & OF_CANCEL )==OF_CANCEL)?"OF_CANCEL ":"",
((mode & OF_CREATE )==OF_CREATE)?"OF_CREATE ":"",
((mode & OF_PROMPT )==OF_PROMPT)?"OF_PROMPT ":"",
((mode & OF_EXIST )==OF_EXIST)?"OF_EXIST ":"",
((mode & OF_REOPEN )==OF_REOPEN)?"OF_REOPEN ":""
);
ofs->cBytes = sizeof(OFSTRUCT);
ofs->nErrCode = 0;
if (mode & OF_REOPEN) name = ofs->szPathName;
if (!name) return HFILE_ERROR;
TRACE("%s %04x\n", name, mode );
/* the watcom 10.6 IDE relies on a valid path returned in ofs->szPathName
Are there any cases where getting the path here is wrong?
Uwe Bonnes 1997 Apr 2 */
len = GetFullPathNameA( name, sizeof(ofs->szPathName), ofs->szPathName, NULL );
if (!len) goto error;
if (len >= sizeof(ofs->szPathName))
{
SetLastError(ERROR_INVALID_DATA);
goto error;
}
/* OF_PARSE simply fills the structure */
if (mode & OF_PARSE)
{
ofs->fFixedDisk = (GetDriveTypeA( ofs->szPathName ) != DRIVE_REMOVABLE);
TRACE("(%s): OF_PARSE, res = '%s'\n", name, ofs->szPathName );
return 0;
}
/* OF_CREATE is completely different from all other options, so
handle it first */
if (mode & OF_CREATE)
{
if ((handle = create_file_OF( name, mode )) == INVALID_HANDLE_VALUE)
goto error;
}
else
{
/* Now look for the file */
len = SearchPathA( NULL, name, NULL, sizeof(ofs->szPathName), ofs->szPathName, NULL );
if (!len) goto error;
if (len >= sizeof(ofs->szPathName))
{
SetLastError(ERROR_INVALID_DATA);
goto error;
}
TRACE("found %s\n", debugstr_a(ofs->szPathName) );
if (mode & OF_DELETE)
{
if (!DeleteFileA( ofs->szPathName )) goto error;
TRACE("(%s): OF_DELETE return = OK\n", name);
return TRUE;
}
handle = LongToHandle(_lopen( ofs->szPathName, mode ));
if (handle == INVALID_HANDLE_VALUE) goto error;
GetFileTime( handle, NULL, NULL, &filetime );
FileTimeToDosDateTime( &filetime, &filedatetime[0], &filedatetime[1] );
if ((mode & OF_VERIFY) && (mode & OF_REOPEN))
{
if (ofs->Reserved1 != filedatetime[0] || ofs->Reserved2 != filedatetime[1] )
{
CloseHandle( handle );
WARN("(%s): OF_VERIFY failed\n", name );
/* FIXME: what error here? */
SetLastError( ERROR_FILE_NOT_FOUND );
goto error;
}
}
ofs->Reserved1 = filedatetime[0];
ofs->Reserved2 = filedatetime[1];
}
TRACE("(%s): OK, return = %p\n", name, handle );
if (mode & OF_EXIST) /* Return TRUE instead of a handle */
{
CloseHandle( handle );
return TRUE;
}
return HandleToLong(handle);
error: /* We get here if there was an error opening the file */
ofs->nErrCode = GetLastError();
WARN("(%s): return = HFILE_ERROR error= %d\n", name,ofs->nErrCode );
return HFILE_ERROR;
}
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