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Try to implement the OF_SHARE_XXX options.

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Move the mode translations to functions.
This commit is contained in:
Uwe Bonnes 1998-10-18 14:48:31 +00:00 • committed by Alexandre Julliard
parent 75175345ae
commit e6b5e38bbc
1 changed files with 320 additions and 29 deletions
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349
files/file.c
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@ -88,6 +88,7 @@ HFILE32 FILE_Alloc( FILE_OBJECT **file )
(*file)->unix_name = NULL;
(*file)->type = FILE_TYPE_DISK;
(*file)->pos = 0;
(*file)->mode = 0;
handle = HANDLE_Alloc( PROCESS_Current(), &(*file)->header,
FILE_ALL_ACCESS | GENERIC_READ |
@ -228,6 +229,259 @@ int FILE_GetUnixHandle( HFILE32 hFile )
return ret;
}
/***********************************************************************
* FILE_UnixToDosMode
*
* PARAMS
* unixmode[I]
* RETURNS
* dosmode
*/
static int FILE_UnixToDosMode(int unixMode)
{
int dosMode;
switch(unixMode & 3)
{
case O_WRONLY:
dosMode = OF_WRITE;
break;
case O_RDWR:
dosMode =OF_READWRITE;
break;
case O_RDONLY:
default:
dosMode = OF_READ;
break;
}
return dosMode;
}
/***********************************************************************
* FILE_DOSToUnixMode
*
* PARAMS
* dosMode[I]
* RETURNS
* unixmode
*/
static int FILE_DOSToUnixMode(int dosMode)
{
int unixMode;
switch(dosMode & 3)
{
case OF_WRITE:
unixMode = O_WRONLY; break;
case OF_READWRITE:
unixMode = O_RDWR; break;
case OF_READ:
default:
unixMode = O_RDONLY; break;
}
return unixMode;
}
/***********************************************************************
* FILE_ShareDeny
*
* PARAMS
* oldmode[I] mode how file was first opened
* mode[I] mode how the file should get opened
* RETURNS
* TRUE: deny open
* FALSE: allow open
*
* Look what we have to do with the given SHARE modes
*
* Ralph Brown's interrupt list gives following explication, I guess
* the same holds for Windows, DENY ALL should be OF_SHARE_COMPAT
*
* FIXME: Validate this function
========from Ralph Brown's list =========
(Table 0750)
Values of DOS file sharing behavior:
| Second and subsequent Opens
First |Compat Deny Deny Deny Deny
Open | All Write Read None
|R W RW R W RW R W RW R W RW R W RW
- - - - -| - - - - - - - - - - - - - - - - -
Compat R |Y Y Y N N N 1 N N N N N 1 N N
W |Y Y Y N N N N N N N N N N N N
RW|Y Y Y N N N N N N N N N N N N
- - - - -|
Deny R |C C C N N N N N N N N N N N N
All W |C C C N N N N N N N N N N N N
RW|C C C N N N N N N N N N N N N
- - - - -|
Deny R |2 C C N N N Y N N N N N Y N N
Write W |C C C N N N N N N Y N N Y N N
RW|C C C N N N N N N N N N Y N N
- - - - -|
Deny R |C C C N N N N Y N N N N N Y N
Read W |C C C N N N N N N N Y N N Y N
RW|C C C N N N N N N N N N N Y N
- - - - -|
Deny R |2 C C N N N Y Y Y N N N Y Y Y
None W |C C C N N N N N N Y Y Y Y Y Y
RW|C C C N N N N N N N N N Y Y Y
Legend: Y = open succeeds, N = open fails with error code 05h
C = open fails, INT 24 generated
1 = open succeeds if file read-only, else fails with error code
2 = open succeeds if file read-only, else fails with INT 24
========end of description from Ralph Brown's List =====
For every "Y" in the table we return FALSE
For every "N" we set the DOS_ERROR and return TRUE
For all other cases we barf,set the DOS_ERROR and return TRUE
*/
static BOOL32 FILE_ShareDeny( int mode, int oldmode)
{
int oldsharemode = oldmode & 0x70;
int sharemode = mode & 0x70;
int oldopenmode = oldmode & 3;
int openmode = mode & 3;
switch (oldsharemode)
{
case OF_SHARE_COMPAT:
if (sharemode == OF_SHARE_COMPAT) return FALSE;
if (openmode == OF_READ) goto test_ro_err05 ;
goto fail_error05;
case OF_SHARE_EXCLUSIVE:
if (sharemode == OF_SHARE_COMPAT) goto fail_int24;
goto fail_error05;
case OF_SHARE_DENY_WRITE:
if (openmode != OF_READ)
{
if (sharemode == OF_SHARE_COMPAT) goto fail_int24;
goto fail_error05;
}
switch (sharemode)
{
case OF_SHARE_COMPAT:
if (oldopenmode == OF_READ) goto test_ro_int24 ;
goto fail_int24;
case OF_SHARE_DENY_NONE :
return FALSE;
case OF_SHARE_DENY_WRITE :
if (oldopenmode == OF_READ) return FALSE;
case OF_SHARE_DENY_READ :
if (oldopenmode == OF_WRITE) return FALSE;
case OF_SHARE_EXCLUSIVE:
default:
goto fail_error05;
}
break;
case OF_SHARE_DENY_READ:
if (openmode != OF_WRITE)
{
if (sharemode == OF_SHARE_COMPAT) goto fail_int24;
goto fail_error05;
}
switch (sharemode)
{
case OF_SHARE_COMPAT:
goto fail_int24;
case OF_SHARE_DENY_NONE :
return FALSE;
case OF_SHARE_DENY_WRITE :
if (oldopenmode == OF_READ) return FALSE;
case OF_SHARE_DENY_READ :
if (oldopenmode == OF_WRITE) return FALSE;
case OF_SHARE_EXCLUSIVE:
default:
goto fail_error05;
}
break;
case OF_SHARE_DENY_NONE:
switch (sharemode)
{
case OF_SHARE_COMPAT:
goto fail_int24;
case OF_SHARE_DENY_NONE :
return FALSE;
case OF_SHARE_DENY_WRITE :
if (oldopenmode == OF_READ) return FALSE;
case OF_SHARE_DENY_READ :
if (oldopenmode == OF_WRITE) return FALSE;
case OF_SHARE_EXCLUSIVE:
default:
goto fail_error05;
}
default:
ERR(file,"unknown mode\n");
}
ERR(file,"shouldn't happen\n");
ERR(file,"Please report to bon@elektron.ikp.physik.tu-darmstadt.de\n");
return TRUE;
test_ro_int24:
FIXME(file,"test if file is RO missing\n");
/* Fall through */
fail_int24:
FIXME(file,"generate INT24 missing\n");
/* Is this the right error? */
DOS_ERROR( ER_AccessDenied, EC_AccessDenied, SA_Abort, EL_Disk );
return TRUE;
test_ro_err05:
FIXME(file,"test if file is RO missing\n");
/* fall through */
fail_error05:
DOS_ERROR( ER_AccessDenied, EC_AccessDenied, SA_Abort, EL_Disk );
return TRUE;
}
/***********************************************************************
*
*
* Look if the File is in Use For the OF_SHARE_XXX options
*
* PARAMS
* name [I]: full unix name of the file that should be opened
* mode [O]: mode how the file was first opened
* RETURNS
* TRUE if the file was opened before
* FALSE if we open the file exclusive for this process
*
* Scope of the files we look for is only the current pdb
* Could we use /proc/self/? on Linux for this?
* Should we use flock? Should we create another structure?
* Searching through all files seem quite expensive for me, but
* I don't see any other way.
*
* FIXME: Extend scope to the whole Wine process
*
*/
static BOOL32 FILE_InUse(char * name, int * mode)
{
FILE_OBJECT *file;
int i;
HGLOBAL16 hPDB = GetCurrentPDB();
PDB *pdb = (PDB *)GlobalLock16( hPDB );
if (!pdb) return 0;
for (i=0;i<pdb->nbFiles;i++)
{
file =FILE_GetFile( (HFILE32) i);
if(file)
{
if(file->unix_name)
{
TRACE(file,"got %s at %d\n",file->unix_name,i);
if(!lstrcmp32A(file->unix_name,name))
{
*mode = file->mode;
FILE_ReleaseFile(file);
return TRUE;
}
FILE_ReleaseFile(file);
}
}
}
return FALSE;
}
/***********************************************************************
* FILE_SetDosError
@ -354,6 +608,11 @@ HFILE32 FILE_Open( LPCSTR path, INT32 mode )
{
DOS_FULL_NAME full_name;
const char *unixName;
int oldMode, dosMode; /* FIXME: Do we really need unixmode as argument for
FILE_Open */
FILE_OBJECT *file;
HFILE32 hFileRet;
BOOL32 fileInUse = FALSE;
TRACE(file, "'%s' %04x\n", path, mode );
@ -380,7 +639,23 @@ HFILE32 FILE_Open( LPCSTR path, INT32 mode )
return HFILE_ERROR32;
unixName = full_name.long_name;
}
return FILE_OpenUnixFile( unixName, mode );
dosMode = FILE_UnixToDosMode(mode);
fileInUse = FILE_InUse(full_name.long_name,&oldMode);
if(fileInUse)
{
TRACE(file, "found another instance with mode 0x%02x\n",oldMode&0x70);
if (FILE_ShareDeny(dosMode,oldMode)) return HFILE_ERROR32;
}
hFileRet = FILE_OpenUnixFile( unixName, mode );
/* we need to save the mode, but only if it is not in use yet*/
if ((hFileRet) && (!fileInUse) && ((file =FILE_GetFile(hFileRet))))
{
file->mode=dosMode;
FILE_ReleaseFile(file);
}
return hFileRet;
}
@ -392,6 +667,9 @@ static HFILE32 FILE_Create( LPCSTR path, int mode, int unique )
HFILE32 handle;
FILE_OBJECT *file;
DOS_FULL_NAME full_name;
BOOL32 fileInUse = FALSE;
int oldMode,dosMode; /* FIXME: Do we really need unixmode as argument for
FILE_Create */;
TRACE(file, "'%s' %04x %d\n", path, mode, unique );
@ -412,6 +690,15 @@ static HFILE32 FILE_Create( LPCSTR path, int mode, int unique )
CloseHandle( handle );
return INVALID_HANDLE_VALUE32;
}
dosMode = FILE_UnixToDosMode(mode);
fileInUse = FILE_InUse(full_name.long_name,&oldMode);
if(fileInUse)
{
TRACE(file, "found another instance with mode 0x%02x\n",oldMode&0x70);
if (FILE_ShareDeny(dosMode,oldMode)) return INVALID_HANDLE_VALUE32;
}
if ((file->unix_handle = open( full_name.long_name,
O_CREAT | O_TRUNC | O_RDWR | (unique ? O_EXCL : 0),
mode )) == -1)
@ -424,6 +711,7 @@ static HFILE32 FILE_Create( LPCSTR path, int mode, int unique )
/* File created OK, now fill the FILE_OBJECT */
file->unix_name = HEAP_strdupA( SystemHeap, 0, full_name.long_name );
file->mode = dosMode;
return handle;
}
@ -739,7 +1027,9 @@ static HFILE32 FILE_DoOpenFile( LPCSTR name, OFSTRUCT *ofs, UINT32 mode,
WORD filedatetime[2];
DOS_FULL_NAME full_name;
char *p;
int unixMode;
int unixMode, oldMode;
FILE_OBJECT *file;
BOOL32 fileInUse = FALSE;
if (!ofs) return HFILE_ERROR32;
@ -805,20 +1095,33 @@ found:
lstrcpyn32A( ofs->szPathName, full_name.short_name,
sizeof(ofs->szPathName) );
fileInUse = FILE_InUse(full_name.long_name,&oldMode);
if(fileInUse)
{
TRACE(file, "found another instance with mode 0x%02x\n",oldMode&0x70);
if (FILE_ShareDeny(mode,oldMode)) return HFILE_ERROR32;
}
if (mode & OF_SHARE_EXCLUSIVE)
/* Some InstallShield version uses OF_SHARE_EXCLUSIVE
on the file <tempdir>/_ins0432._mp to determine how
far installation has proceeded.
_ins0432._mp is an executable and while running the
application expects the open with OF_SHARE_ to fail*/
/* Probable FIXME:
As our loader closes the files after loading the executable,
we can't find the running executable with FILE_InUse.
Perhaps the loader should keep the file open.
Recheck against how Win handles that case */
{
char *last = strrchr(full_name.long_name,'/');
if (!last)
last = full_name.long_name - 1;
/* Some InstallShield version uses OF_SHARE_EXCLUSIVE
on the file <tempdir>/_ins0432._mp to determine how
far installation has proceeded*/
if (GetModuleHandle16(last+1))
{
TRACE(file,"Denying shared open for %s\n",full_name.long_name);
return HFILE_ERROR32;
}
FIXME(file,"OF_SHARE_EXCLUSIVE only partial implemented\n");
}
if (mode & OF_DELETE)
@ -828,19 +1131,17 @@ found:
return 1;
}
switch(mode & 3)
{
case OF_WRITE:
unixMode = O_WRONLY; break;
case OF_READWRITE:
unixMode = O_RDWR; break;
case OF_READ:
default:
unixMode = O_RDONLY; break;
}
unixMode=FILE_DOSToUnixMode(mode);
hFileRet = FILE_OpenUnixFile( full_name.long_name, unixMode );
if (hFileRet == HFILE_ERROR32) goto not_found;
/* we need to save the mode, but only if it is not in use yet*/
if( (!fileInUse) &&(file =FILE_GetFile(hFileRet)))
{
file->mode=mode;
FILE_ReleaseFile(file);
}
GetFileTime( hFileRet, NULL, NULL, &filetime );
FileTimeToDosDateTime( &filetime, &filedatetime[0], &filedatetime[1] );
if ((mode & OF_VERIFY) && (mode & OF_REOPEN))
@ -1107,19 +1408,9 @@ HFILE32 WINAPI _lopen32( LPCSTR path, INT32 mode )
TRACE(file, "('%s',%04x)\n", path, mode );
switch(mode & 3)
{
case OF_WRITE:
unixMode = O_WRONLY;
break;
case OF_READWRITE:
unixMode = O_RDWR;
break;
case OF_READ:
default:
unixMode = O_RDONLY;
break;
}
unixMode= FILE_DOSToUnixMode(mode);
unixMode |= (mode &0x70); /* transfer the OF_SHARE options to handle
them in FILE_Open*/
return FILE_Open( path, unixMode );
}